Fri, 18 Jul 2014 19:56:02 +0200
8051378: AIX: Change "8030763: Validate global memory allocation" breaks the HotSpot build
Reviewed-by: kvn
simonis@6465 | 1 | /* |
simonis@6465 | 2 | * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
goetz@6515 | 3 | * Copyright 2012, 2014 SAP AG. All rights reserved. |
simonis@6465 | 4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
simonis@6465 | 5 | * |
simonis@6465 | 6 | * This code is free software; you can redistribute it and/or modify it |
simonis@6465 | 7 | * under the terms of the GNU General Public License version 2 only, as |
simonis@6465 | 8 | * published by the Free Software Foundation. |
simonis@6465 | 9 | * |
simonis@6465 | 10 | * This code is distributed in the hope that it will be useful, but WITHOUT |
simonis@6465 | 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
simonis@6465 | 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
simonis@6465 | 13 | * version 2 for more details (a copy is included in the LICENSE file that |
simonis@6465 | 14 | * accompanied this code). |
simonis@6465 | 15 | * |
simonis@6465 | 16 | * You should have received a copy of the GNU General Public License version |
simonis@6465 | 17 | * 2 along with this work; if not, write to the Free Software Foundation, |
simonis@6465 | 18 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
simonis@6465 | 19 | * |
simonis@6465 | 20 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
simonis@6465 | 21 | * or visit www.oracle.com if you need additional information or have any |
simonis@6465 | 22 | * questions. |
simonis@6465 | 23 | * |
simonis@6465 | 24 | */ |
simonis@6465 | 25 | |
simonis@6465 | 26 | // According to the AIX OS doc #pragma alloca must be used |
simonis@6465 | 27 | // with C++ compiler before referencing the function alloca() |
simonis@6465 | 28 | #pragma alloca |
simonis@6465 | 29 | |
simonis@6465 | 30 | // no precompiled headers |
simonis@6465 | 31 | #include "classfile/classLoader.hpp" |
simonis@6465 | 32 | #include "classfile/systemDictionary.hpp" |
simonis@6465 | 33 | #include "classfile/vmSymbols.hpp" |
simonis@6465 | 34 | #include "code/icBuffer.hpp" |
simonis@6465 | 35 | #include "code/vtableStubs.hpp" |
simonis@6465 | 36 | #include "compiler/compileBroker.hpp" |
simonis@6465 | 37 | #include "interpreter/interpreter.hpp" |
simonis@6465 | 38 | #include "jvm_aix.h" |
simonis@6465 | 39 | #include "libperfstat_aix.hpp" |
simonis@6465 | 40 | #include "loadlib_aix.hpp" |
simonis@6465 | 41 | #include "memory/allocation.inline.hpp" |
simonis@6465 | 42 | #include "memory/filemap.hpp" |
simonis@6465 | 43 | #include "mutex_aix.inline.hpp" |
simonis@6465 | 44 | #include "oops/oop.inline.hpp" |
simonis@6465 | 45 | #include "os_share_aix.hpp" |
simonis@6465 | 46 | #include "porting_aix.hpp" |
simonis@6465 | 47 | #include "prims/jniFastGetField.hpp" |
simonis@6465 | 48 | #include "prims/jvm.h" |
simonis@6465 | 49 | #include "prims/jvm_misc.hpp" |
simonis@6465 | 50 | #include "runtime/arguments.hpp" |
simonis@6465 | 51 | #include "runtime/extendedPC.hpp" |
simonis@6465 | 52 | #include "runtime/globals.hpp" |
simonis@6465 | 53 | #include "runtime/interfaceSupport.hpp" |
simonis@6465 | 54 | #include "runtime/java.hpp" |
simonis@6465 | 55 | #include "runtime/javaCalls.hpp" |
simonis@6465 | 56 | #include "runtime/mutexLocker.hpp" |
simonis@6465 | 57 | #include "runtime/objectMonitor.hpp" |
simonis@6465 | 58 | #include "runtime/osThread.hpp" |
simonis@6465 | 59 | #include "runtime/perfMemory.hpp" |
simonis@6465 | 60 | #include "runtime/sharedRuntime.hpp" |
simonis@6465 | 61 | #include "runtime/statSampler.hpp" |
simonis@6465 | 62 | #include "runtime/stubRoutines.hpp" |
goetz@6556 | 63 | #include "runtime/thread.inline.hpp" |
simonis@6465 | 64 | #include "runtime/threadCritical.hpp" |
simonis@6465 | 65 | #include "runtime/timer.hpp" |
simonis@6465 | 66 | #include "services/attachListener.hpp" |
simonis@6465 | 67 | #include "services/runtimeService.hpp" |
simonis@6465 | 68 | #include "utilities/decoder.hpp" |
simonis@6465 | 69 | #include "utilities/defaultStream.hpp" |
simonis@6465 | 70 | #include "utilities/events.hpp" |
simonis@6465 | 71 | #include "utilities/growableArray.hpp" |
simonis@6465 | 72 | #include "utilities/vmError.hpp" |
simonis@6465 | 73 | |
simonis@6465 | 74 | // put OS-includes here (sorted alphabetically) |
simonis@6465 | 75 | #include <errno.h> |
simonis@6465 | 76 | #include <fcntl.h> |
simonis@6465 | 77 | #include <inttypes.h> |
simonis@6465 | 78 | #include <poll.h> |
simonis@6465 | 79 | #include <procinfo.h> |
simonis@6465 | 80 | #include <pthread.h> |
simonis@6465 | 81 | #include <pwd.h> |
simonis@6465 | 82 | #include <semaphore.h> |
simonis@6465 | 83 | #include <signal.h> |
simonis@6465 | 84 | #include <stdint.h> |
simonis@6465 | 85 | #include <stdio.h> |
simonis@6465 | 86 | #include <string.h> |
simonis@6465 | 87 | #include <unistd.h> |
simonis@6465 | 88 | #include <sys/ioctl.h> |
simonis@6465 | 89 | #include <sys/ipc.h> |
simonis@6465 | 90 | #include <sys/mman.h> |
simonis@6465 | 91 | #include <sys/resource.h> |
simonis@6465 | 92 | #include <sys/select.h> |
simonis@6465 | 93 | #include <sys/shm.h> |
simonis@6465 | 94 | #include <sys/socket.h> |
simonis@6465 | 95 | #include <sys/stat.h> |
simonis@6465 | 96 | #include <sys/sysinfo.h> |
simonis@6465 | 97 | #include <sys/systemcfg.h> |
simonis@6465 | 98 | #include <sys/time.h> |
simonis@6465 | 99 | #include <sys/times.h> |
simonis@6465 | 100 | #include <sys/types.h> |
simonis@6465 | 101 | #include <sys/utsname.h> |
simonis@6465 | 102 | #include <sys/vminfo.h> |
simonis@6465 | 103 | #include <sys/wait.h> |
simonis@6465 | 104 | |
simonis@6465 | 105 | // Add missing declarations (should be in procinfo.h but isn't until AIX 6.1). |
simonis@6465 | 106 | #if !defined(_AIXVERSION_610) |
simonis@6465 | 107 | extern "C" { |
simonis@6465 | 108 | int getthrds64(pid_t ProcessIdentifier, |
simonis@6465 | 109 | struct thrdentry64* ThreadBuffer, |
simonis@6465 | 110 | int ThreadSize, |
simonis@6465 | 111 | tid64_t* IndexPointer, |
simonis@6465 | 112 | int Count); |
simonis@6465 | 113 | } |
simonis@6465 | 114 | #endif |
simonis@6465 | 115 | |
simonis@6465 | 116 | // Excerpts from systemcfg.h definitions newer than AIX 5.3 |
simonis@6465 | 117 | #ifndef PV_7 |
simonis@6465 | 118 | # define PV_7 0x200000 // Power PC 7 |
simonis@6465 | 119 | # define PV_7_Compat 0x208000 // Power PC 7 |
simonis@6465 | 120 | #endif |
simonis@6465 | 121 | |
simonis@6465 | 122 | #define MAX_PATH (2 * K) |
simonis@6465 | 123 | |
simonis@6465 | 124 | // for timer info max values which include all bits |
simonis@6465 | 125 | #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) |
simonis@6465 | 126 | // for multipage initialization error analysis (in 'g_multipage_error') |
simonis@6465 | 127 | #define ERROR_MP_OS_TOO_OLD 100 |
simonis@6465 | 128 | #define ERROR_MP_EXTSHM_ACTIVE 101 |
simonis@6465 | 129 | #define ERROR_MP_VMGETINFO_FAILED 102 |
simonis@6465 | 130 | #define ERROR_MP_VMGETINFO_CLAIMS_NO_SUPPORT_FOR_64K 103 |
simonis@6465 | 131 | |
simonis@6465 | 132 | // the semantics in this file are thus that codeptr_t is a *real code ptr* |
simonis@6465 | 133 | // This means that any function taking codeptr_t as arguments will assume |
simonis@6465 | 134 | // a real codeptr and won't handle function descriptors (eg getFuncName), |
simonis@6465 | 135 | // whereas functions taking address as args will deal with function |
simonis@6465 | 136 | // descriptors (eg os::dll_address_to_library_name) |
simonis@6465 | 137 | typedef unsigned int* codeptr_t; |
simonis@6465 | 138 | |
simonis@6465 | 139 | // typedefs for stackslots, stack pointers, pointers to op codes |
simonis@6465 | 140 | typedef unsigned long stackslot_t; |
simonis@6465 | 141 | typedef stackslot_t* stackptr_t; |
simonis@6465 | 142 | |
simonis@6465 | 143 | // query dimensions of the stack of the calling thread |
simonis@6465 | 144 | static void query_stack_dimensions(address* p_stack_base, size_t* p_stack_size); |
simonis@6465 | 145 | |
simonis@6465 | 146 | // function to check a given stack pointer against given stack limits |
simonis@6465 | 147 | inline bool is_valid_stackpointer(stackptr_t sp, stackptr_t stack_base, size_t stack_size) { |
simonis@6465 | 148 | if (((uintptr_t)sp) & 0x7) { |
simonis@6465 | 149 | return false; |
simonis@6465 | 150 | } |
simonis@6465 | 151 | if (sp > stack_base) { |
simonis@6465 | 152 | return false; |
simonis@6465 | 153 | } |
simonis@6465 | 154 | if (sp < (stackptr_t) ((address)stack_base - stack_size)) { |
simonis@6465 | 155 | return false; |
simonis@6465 | 156 | } |
simonis@6465 | 157 | return true; |
simonis@6465 | 158 | } |
simonis@6465 | 159 | |
simonis@6465 | 160 | // returns true if function is a valid codepointer |
simonis@6465 | 161 | inline bool is_valid_codepointer(codeptr_t p) { |
simonis@6465 | 162 | if (!p) { |
simonis@6465 | 163 | return false; |
simonis@6465 | 164 | } |
simonis@6465 | 165 | if (((uintptr_t)p) & 0x3) { |
simonis@6465 | 166 | return false; |
simonis@6465 | 167 | } |
simonis@6465 | 168 | if (LoadedLibraries::find_for_text_address((address)p) == NULL) { |
simonis@6465 | 169 | return false; |
simonis@6465 | 170 | } |
simonis@6465 | 171 | return true; |
simonis@6465 | 172 | } |
simonis@6465 | 173 | |
simonis@6465 | 174 | // macro to check a given stack pointer against given stack limits and to die if test fails |
simonis@6465 | 175 | #define CHECK_STACK_PTR(sp, stack_base, stack_size) { \ |
simonis@6465 | 176 | guarantee(is_valid_stackpointer((stackptr_t)(sp), (stackptr_t)(stack_base), stack_size), "Stack Pointer Invalid"); \ |
simonis@6465 | 177 | } |
simonis@6465 | 178 | |
simonis@6465 | 179 | // macro to check the current stack pointer against given stacklimits |
simonis@6465 | 180 | #define CHECK_CURRENT_STACK_PTR(stack_base, stack_size) { \ |
simonis@6465 | 181 | address sp; \ |
simonis@6465 | 182 | sp = os::current_stack_pointer(); \ |
simonis@6465 | 183 | CHECK_STACK_PTR(sp, stack_base, stack_size); \ |
simonis@6465 | 184 | } |
simonis@6465 | 185 | |
simonis@6465 | 186 | //////////////////////////////////////////////////////////////////////////////// |
simonis@6465 | 187 | // global variables (for a description see os_aix.hpp) |
simonis@6465 | 188 | |
simonis@6465 | 189 | julong os::Aix::_physical_memory = 0; |
simonis@6465 | 190 | pthread_t os::Aix::_main_thread = ((pthread_t)0); |
simonis@6465 | 191 | int os::Aix::_page_size = -1; |
simonis@6465 | 192 | int os::Aix::_on_pase = -1; |
simonis@6465 | 193 | int os::Aix::_os_version = -1; |
simonis@6465 | 194 | int os::Aix::_stack_page_size = -1; |
simonis@6465 | 195 | size_t os::Aix::_shm_default_page_size = -1; |
simonis@6465 | 196 | int os::Aix::_can_use_64K_pages = -1; |
simonis@6465 | 197 | int os::Aix::_can_use_16M_pages = -1; |
simonis@6465 | 198 | int os::Aix::_xpg_sus_mode = -1; |
simonis@6465 | 199 | int os::Aix::_extshm = -1; |
simonis@6465 | 200 | int os::Aix::_logical_cpus = -1; |
simonis@6465 | 201 | |
simonis@6465 | 202 | //////////////////////////////////////////////////////////////////////////////// |
simonis@6465 | 203 | // local variables |
simonis@6465 | 204 | |
simonis@6465 | 205 | static int g_multipage_error = -1; // error analysis for multipage initialization |
simonis@6465 | 206 | static jlong initial_time_count = 0; |
simonis@6465 | 207 | static int clock_tics_per_sec = 100; |
simonis@6465 | 208 | static sigset_t check_signal_done; // For diagnostics to print a message once (see run_periodic_checks) |
simonis@6465 | 209 | static bool check_signals = true; |
simonis@6465 | 210 | static pid_t _initial_pid = 0; |
simonis@6465 | 211 | static int SR_signum = SIGUSR2; // Signal used to suspend/resume a thread (must be > SIGSEGV, see 4355769) |
simonis@6465 | 212 | static sigset_t SR_sigset; |
simonis@6465 | 213 | static pthread_mutex_t dl_mutex; // Used to protect dlsym() calls */ |
simonis@6465 | 214 | |
simonis@6465 | 215 | julong os::available_memory() { |
simonis@6465 | 216 | return Aix::available_memory(); |
simonis@6465 | 217 | } |
simonis@6465 | 218 | |
simonis@6465 | 219 | julong os::Aix::available_memory() { |
simonis@6471 | 220 | os::Aix::meminfo_t mi; |
simonis@6471 | 221 | if (os::Aix::get_meminfo(&mi)) { |
simonis@6471 | 222 | return mi.real_free; |
simonis@6471 | 223 | } else { |
simonis@6471 | 224 | return 0xFFFFFFFFFFFFFFFFLL; |
simonis@6471 | 225 | } |
simonis@6465 | 226 | } |
simonis@6465 | 227 | |
simonis@6465 | 228 | julong os::physical_memory() { |
simonis@6465 | 229 | return Aix::physical_memory(); |
simonis@6465 | 230 | } |
simonis@6465 | 231 | |
simonis@6465 | 232 | //////////////////////////////////////////////////////////////////////////////// |
simonis@6465 | 233 | // environment support |
simonis@6465 | 234 | |
simonis@6465 | 235 | bool os::getenv(const char* name, char* buf, int len) { |
simonis@6465 | 236 | const char* val = ::getenv(name); |
simonis@6465 | 237 | if (val != NULL && strlen(val) < (size_t)len) { |
simonis@6465 | 238 | strcpy(buf, val); |
simonis@6465 | 239 | return true; |
simonis@6465 | 240 | } |
simonis@6465 | 241 | if (len > 0) buf[0] = 0; // return a null string |
simonis@6465 | 242 | return false; |
simonis@6465 | 243 | } |
simonis@6465 | 244 | |
simonis@6465 | 245 | |
simonis@6465 | 246 | // Return true if user is running as root. |
simonis@6465 | 247 | |
simonis@6465 | 248 | bool os::have_special_privileges() { |
simonis@6465 | 249 | static bool init = false; |
simonis@6465 | 250 | static bool privileges = false; |
simonis@6465 | 251 | if (!init) { |
simonis@6465 | 252 | privileges = (getuid() != geteuid()) || (getgid() != getegid()); |
simonis@6465 | 253 | init = true; |
simonis@6465 | 254 | } |
simonis@6465 | 255 | return privileges; |
simonis@6465 | 256 | } |
simonis@6465 | 257 | |
simonis@6465 | 258 | // Helper function, emulates disclaim64 using multiple 32bit disclaims |
simonis@6465 | 259 | // because we cannot use disclaim64() on AS/400 and old AIX releases. |
simonis@6465 | 260 | static bool my_disclaim64(char* addr, size_t size) { |
simonis@6465 | 261 | |
simonis@6465 | 262 | if (size == 0) { |
simonis@6465 | 263 | return true; |
simonis@6465 | 264 | } |
simonis@6465 | 265 | |
simonis@6465 | 266 | // Maximum size 32bit disclaim() accepts. (Theoretically 4GB, but I just do not trust that.) |
simonis@6465 | 267 | const unsigned int maxDisclaimSize = 0x80000000; |
simonis@6465 | 268 | |
simonis@6465 | 269 | const unsigned int numFullDisclaimsNeeded = (size / maxDisclaimSize); |
simonis@6465 | 270 | const unsigned int lastDisclaimSize = (size % maxDisclaimSize); |
simonis@6465 | 271 | |
simonis@6465 | 272 | char* p = addr; |
simonis@6465 | 273 | |
simonis@6465 | 274 | for (int i = 0; i < numFullDisclaimsNeeded; i ++) { |
simonis@6465 | 275 | if (::disclaim(p, maxDisclaimSize, DISCLAIM_ZEROMEM) != 0) { |
simonis@6465 | 276 | //if (Verbose) |
simonis@6465 | 277 | fprintf(stderr, "Cannot disclaim %p - %p (errno %d)\n", p, p + maxDisclaimSize, errno); |
simonis@6465 | 278 | return false; |
simonis@6465 | 279 | } |
simonis@6465 | 280 | p += maxDisclaimSize; |
simonis@6465 | 281 | } |
simonis@6465 | 282 | |
simonis@6465 | 283 | if (lastDisclaimSize > 0) { |
simonis@6465 | 284 | if (::disclaim(p, lastDisclaimSize, DISCLAIM_ZEROMEM) != 0) { |
simonis@6465 | 285 | //if (Verbose) |
simonis@6465 | 286 | fprintf(stderr, "Cannot disclaim %p - %p (errno %d)\n", p, p + lastDisclaimSize, errno); |
simonis@6465 | 287 | return false; |
simonis@6465 | 288 | } |
simonis@6465 | 289 | } |
simonis@6465 | 290 | |
simonis@6465 | 291 | return true; |
simonis@6465 | 292 | } |
simonis@6465 | 293 | |
simonis@6465 | 294 | // Cpu architecture string |
simonis@6465 | 295 | #if defined(PPC32) |
simonis@6465 | 296 | static char cpu_arch[] = "ppc"; |
simonis@6465 | 297 | #elif defined(PPC64) |
simonis@6465 | 298 | static char cpu_arch[] = "ppc64"; |
simonis@6465 | 299 | #else |
simonis@6465 | 300 | #error Add appropriate cpu_arch setting |
simonis@6465 | 301 | #endif |
simonis@6465 | 302 | |
simonis@6465 | 303 | |
simonis@6465 | 304 | // Given an address, returns the size of the page backing that address. |
simonis@6465 | 305 | size_t os::Aix::query_pagesize(void* addr) { |
simonis@6465 | 306 | |
simonis@6465 | 307 | vm_page_info pi; |
simonis@6465 | 308 | pi.addr = (uint64_t)addr; |
simonis@6465 | 309 | if (::vmgetinfo(&pi, VM_PAGE_INFO, sizeof(pi)) == 0) { |
simonis@6465 | 310 | return pi.pagesize; |
simonis@6465 | 311 | } else { |
simonis@6465 | 312 | fprintf(stderr, "vmgetinfo failed to retrieve page size for address %p (errno %d).\n", addr, errno); |
simonis@6465 | 313 | assert(false, "vmgetinfo failed to retrieve page size"); |
simonis@6465 | 314 | return SIZE_4K; |
simonis@6465 | 315 | } |
simonis@6465 | 316 | |
simonis@6465 | 317 | } |
simonis@6465 | 318 | |
simonis@6465 | 319 | // Returns the kernel thread id of the currently running thread. |
simonis@6465 | 320 | pid_t os::Aix::gettid() { |
simonis@6465 | 321 | return (pid_t) thread_self(); |
simonis@6465 | 322 | } |
simonis@6465 | 323 | |
simonis@6465 | 324 | void os::Aix::initialize_system_info() { |
simonis@6465 | 325 | |
simonis@6465 | 326 | // get the number of online(logical) cpus instead of configured |
simonis@6465 | 327 | os::_processor_count = sysconf(_SC_NPROCESSORS_ONLN); |
simonis@6465 | 328 | assert(_processor_count > 0, "_processor_count must be > 0"); |
simonis@6465 | 329 | |
simonis@6465 | 330 | // retrieve total physical storage |
simonis@6465 | 331 | os::Aix::meminfo_t mi; |
simonis@6465 | 332 | if (!os::Aix::get_meminfo(&mi)) { |
simonis@6465 | 333 | fprintf(stderr, "os::Aix::get_meminfo failed.\n"); fflush(stderr); |
simonis@6465 | 334 | assert(false, "os::Aix::get_meminfo failed."); |
simonis@6465 | 335 | } |
simonis@6465 | 336 | _physical_memory = (julong) mi.real_total; |
simonis@6465 | 337 | } |
simonis@6465 | 338 | |
simonis@6465 | 339 | // Helper function for tracing page sizes. |
simonis@6465 | 340 | static const char* describe_pagesize(size_t pagesize) { |
simonis@6465 | 341 | switch (pagesize) { |
simonis@6465 | 342 | case SIZE_4K : return "4K"; |
simonis@6465 | 343 | case SIZE_64K: return "64K"; |
simonis@6465 | 344 | case SIZE_16M: return "16M"; |
simonis@6465 | 345 | case SIZE_16G: return "16G"; |
simonis@6465 | 346 | default: |
simonis@6465 | 347 | assert(false, "surprise"); |
simonis@6465 | 348 | return "??"; |
simonis@6465 | 349 | } |
simonis@6465 | 350 | } |
simonis@6465 | 351 | |
simonis@6465 | 352 | // Retrieve information about multipage size support. Will initialize |
simonis@6465 | 353 | // Aix::_page_size, Aix::_stack_page_size, Aix::_can_use_64K_pages, |
simonis@6465 | 354 | // Aix::_can_use_16M_pages. |
simonis@6465 | 355 | // Must be called before calling os::large_page_init(). |
simonis@6465 | 356 | void os::Aix::query_multipage_support() { |
simonis@6465 | 357 | |
simonis@6465 | 358 | guarantee(_page_size == -1 && |
simonis@6465 | 359 | _stack_page_size == -1 && |
simonis@6465 | 360 | _can_use_64K_pages == -1 && |
simonis@6465 | 361 | _can_use_16M_pages == -1 && |
simonis@6465 | 362 | g_multipage_error == -1, |
simonis@6465 | 363 | "do not call twice"); |
simonis@6465 | 364 | |
simonis@6465 | 365 | _page_size = ::sysconf(_SC_PAGESIZE); |
simonis@6465 | 366 | |
simonis@6465 | 367 | // This really would surprise me. |
simonis@6465 | 368 | assert(_page_size == SIZE_4K, "surprise!"); |
simonis@6465 | 369 | |
simonis@6465 | 370 | |
goetz@6556 | 371 | // Query default data page size (default page size for C-Heap, pthread stacks and .bss). |
simonis@6465 | 372 | // Default data page size is influenced either by linker options (-bdatapsize) |
simonis@6465 | 373 | // or by environment variable LDR_CNTRL (suboption DATAPSIZE). If none is given, |
simonis@6465 | 374 | // default should be 4K. |
simonis@6465 | 375 | size_t data_page_size = SIZE_4K; |
simonis@6465 | 376 | { |
simonis@6465 | 377 | void* p = ::malloc(SIZE_16M); |
goetz@6556 | 378 | guarantee(p != NULL, "malloc failed"); |
simonis@6465 | 379 | data_page_size = os::Aix::query_pagesize(p); |
simonis@6465 | 380 | ::free(p); |
simonis@6465 | 381 | } |
simonis@6465 | 382 | |
simonis@6465 | 383 | // query default shm page size (LDR_CNTRL SHMPSIZE) |
simonis@6465 | 384 | { |
simonis@6465 | 385 | const int shmid = ::shmget(IPC_PRIVATE, 1, IPC_CREAT | S_IRUSR | S_IWUSR); |
simonis@6465 | 386 | guarantee(shmid != -1, "shmget failed"); |
simonis@6465 | 387 | void* p = ::shmat(shmid, NULL, 0); |
simonis@6465 | 388 | ::shmctl(shmid, IPC_RMID, NULL); |
simonis@6465 | 389 | guarantee(p != (void*) -1, "shmat failed"); |
simonis@6465 | 390 | _shm_default_page_size = os::Aix::query_pagesize(p); |
simonis@6465 | 391 | ::shmdt(p); |
simonis@6465 | 392 | } |
simonis@6465 | 393 | |
simonis@6465 | 394 | // before querying the stack page size, make sure we are not running as primordial |
simonis@6465 | 395 | // thread (because primordial thread's stack may have different page size than |
simonis@6465 | 396 | // pthread thread stacks). Running a VM on the primordial thread won't work for a |
simonis@6465 | 397 | // number of reasons so we may just as well guarantee it here |
simonis@6465 | 398 | guarantee(!os::Aix::is_primordial_thread(), "Must not be called for primordial thread"); |
simonis@6465 | 399 | |
simonis@6465 | 400 | // query stack page size |
simonis@6465 | 401 | { |
simonis@6465 | 402 | int dummy = 0; |
simonis@6465 | 403 | _stack_page_size = os::Aix::query_pagesize(&dummy); |
simonis@6465 | 404 | // everything else would surprise me and should be looked into |
simonis@6465 | 405 | guarantee(_stack_page_size == SIZE_4K || _stack_page_size == SIZE_64K, "Wrong page size"); |
simonis@6465 | 406 | // also, just for completeness: pthread stacks are allocated from C heap, so |
simonis@6465 | 407 | // stack page size should be the same as data page size |
simonis@6465 | 408 | guarantee(_stack_page_size == data_page_size, "stack page size should be the same as data page size"); |
simonis@6465 | 409 | } |
simonis@6465 | 410 | |
simonis@6465 | 411 | // EXTSHM is bad: among other things, it prevents setting pagesize dynamically |
simonis@6465 | 412 | // for system V shm. |
simonis@6465 | 413 | if (Aix::extshm()) { |
simonis@6465 | 414 | if (Verbose) { |
simonis@6465 | 415 | fprintf(stderr, "EXTSHM is active - will disable large page support.\n" |
simonis@6465 | 416 | "Please make sure EXTSHM is OFF for large page support.\n"); |
simonis@6465 | 417 | } |
simonis@6465 | 418 | g_multipage_error = ERROR_MP_EXTSHM_ACTIVE; |
simonis@6465 | 419 | _can_use_64K_pages = _can_use_16M_pages = 0; |
simonis@6465 | 420 | goto query_multipage_support_end; |
simonis@6465 | 421 | } |
simonis@6465 | 422 | |
simonis@6465 | 423 | // now check which page sizes the OS claims it supports, and of those, which actually can be used. |
simonis@6465 | 424 | { |
simonis@6465 | 425 | const int MAX_PAGE_SIZES = 4; |
simonis@6465 | 426 | psize_t sizes[MAX_PAGE_SIZES]; |
simonis@6465 | 427 | const int num_psizes = ::vmgetinfo(sizes, VMINFO_GETPSIZES, MAX_PAGE_SIZES); |
simonis@6465 | 428 | if (num_psizes == -1) { |
simonis@6465 | 429 | if (Verbose) { |
simonis@6465 | 430 | fprintf(stderr, "vmgetinfo(VMINFO_GETPSIZES) failed (errno: %d)\n", errno); |
simonis@6465 | 431 | fprintf(stderr, "disabling multipage support.\n"); |
simonis@6465 | 432 | } |
simonis@6465 | 433 | g_multipage_error = ERROR_MP_VMGETINFO_FAILED; |
simonis@6465 | 434 | _can_use_64K_pages = _can_use_16M_pages = 0; |
simonis@6465 | 435 | goto query_multipage_support_end; |
simonis@6465 | 436 | } |
simonis@6465 | 437 | guarantee(num_psizes > 0, "vmgetinfo(.., VMINFO_GETPSIZES, ...) failed."); |
simonis@6465 | 438 | assert(num_psizes <= MAX_PAGE_SIZES, "Surprise! more than 4 page sizes?"); |
simonis@6465 | 439 | if (Verbose) { |
simonis@6465 | 440 | fprintf(stderr, "vmgetinfo(.., VMINFO_GETPSIZES, ...) returns %d supported page sizes: ", num_psizes); |
simonis@6465 | 441 | for (int i = 0; i < num_psizes; i ++) { |
simonis@6465 | 442 | fprintf(stderr, " %s ", describe_pagesize(sizes[i])); |
simonis@6465 | 443 | } |
simonis@6465 | 444 | fprintf(stderr, " .\n"); |
simonis@6465 | 445 | } |
simonis@6465 | 446 | |
simonis@6465 | 447 | // Can we use 64K, 16M pages? |
simonis@6465 | 448 | _can_use_64K_pages = 0; |
simonis@6465 | 449 | _can_use_16M_pages = 0; |
simonis@6465 | 450 | for (int i = 0; i < num_psizes; i ++) { |
simonis@6465 | 451 | if (sizes[i] == SIZE_64K) { |
simonis@6465 | 452 | _can_use_64K_pages = 1; |
simonis@6465 | 453 | } else if (sizes[i] == SIZE_16M) { |
simonis@6465 | 454 | _can_use_16M_pages = 1; |
simonis@6465 | 455 | } |
simonis@6465 | 456 | } |
simonis@6465 | 457 | |
simonis@6465 | 458 | if (!_can_use_64K_pages) { |
simonis@6465 | 459 | g_multipage_error = ERROR_MP_VMGETINFO_CLAIMS_NO_SUPPORT_FOR_64K; |
simonis@6465 | 460 | } |
simonis@6465 | 461 | |
simonis@6465 | 462 | // Double-check for 16M pages: Even if AIX claims to be able to use 16M pages, |
simonis@6465 | 463 | // there must be an actual 16M page pool, and we must run with enough rights. |
simonis@6465 | 464 | if (_can_use_16M_pages) { |
simonis@6465 | 465 | const int shmid = ::shmget(IPC_PRIVATE, SIZE_16M, IPC_CREAT | S_IRUSR | S_IWUSR); |
simonis@6465 | 466 | guarantee(shmid != -1, "shmget failed"); |
simonis@6465 | 467 | struct shmid_ds shm_buf = { 0 }; |
simonis@6465 | 468 | shm_buf.shm_pagesize = SIZE_16M; |
simonis@6465 | 469 | const bool can_set_pagesize = ::shmctl(shmid, SHM_PAGESIZE, &shm_buf) == 0 ? true : false; |
simonis@6465 | 470 | const int en = errno; |
simonis@6465 | 471 | ::shmctl(shmid, IPC_RMID, NULL); |
simonis@6465 | 472 | if (!can_set_pagesize) { |
simonis@6465 | 473 | if (Verbose) { |
simonis@6465 | 474 | fprintf(stderr, "Failed to allocate even one misely 16M page. shmctl failed with %d (%s).\n" |
simonis@6465 | 475 | "Will deactivate 16M support.\n", en, strerror(en)); |
simonis@6465 | 476 | } |
simonis@6465 | 477 | _can_use_16M_pages = 0; |
simonis@6465 | 478 | } |
simonis@6465 | 479 | } |
simonis@6465 | 480 | |
simonis@6465 | 481 | } // end: check which pages can be used for shared memory |
simonis@6465 | 482 | |
simonis@6465 | 483 | query_multipage_support_end: |
simonis@6465 | 484 | |
simonis@6465 | 485 | guarantee(_page_size != -1 && |
simonis@6465 | 486 | _stack_page_size != -1 && |
simonis@6465 | 487 | _can_use_64K_pages != -1 && |
simonis@6465 | 488 | _can_use_16M_pages != -1, "Page sizes not properly initialized"); |
simonis@6465 | 489 | |
simonis@6465 | 490 | if (_can_use_64K_pages) { |
simonis@6465 | 491 | g_multipage_error = 0; |
simonis@6465 | 492 | } |
simonis@6465 | 493 | |
simonis@6465 | 494 | if (Verbose) { |
simonis@6465 | 495 | fprintf(stderr, "Data page size (C-Heap, bss, etc): %s\n", describe_pagesize(data_page_size)); |
simonis@6465 | 496 | fprintf(stderr, "Thread stack page size (pthread): %s\n", describe_pagesize(_stack_page_size)); |
simonis@6465 | 497 | fprintf(stderr, "Default shared memory page size: %s\n", describe_pagesize(_shm_default_page_size)); |
simonis@6465 | 498 | fprintf(stderr, "Can use 64K pages dynamically with shared meory: %s\n", (_can_use_64K_pages ? "yes" :"no")); |
simonis@6465 | 499 | fprintf(stderr, "Can use 16M pages dynamically with shared memory: %s\n", (_can_use_16M_pages ? "yes" :"no")); |
simonis@6465 | 500 | fprintf(stderr, "Multipage error details: %d\n", g_multipage_error); |
simonis@6465 | 501 | } |
simonis@6465 | 502 | |
simonis@6465 | 503 | } // end os::Aix::query_multipage_support() |
simonis@6465 | 504 | |
goetz@6556 | 505 | // The code for this method was initially derived from the version in os_linux.cpp. |
simonis@6465 | 506 | void os::init_system_properties_values() { |
goetz@6556 | 507 | |
simonis@6465 | 508 | #define DEFAULT_LIBPATH "/usr/lib:/lib" |
simonis@6465 | 509 | #define EXTENSIONS_DIR "/lib/ext" |
simonis@6465 | 510 | #define ENDORSED_DIR "/lib/endorsed" |
simonis@6465 | 511 | |
goetz@6556 | 512 | // Buffer that fits several sprintfs. |
goetz@6556 | 513 | // Note that the space for the trailing null is provided |
goetz@6556 | 514 | // by the nulls included by the sizeof operator. |
goetz@6556 | 515 | const size_t bufsize = |
goetz@6556 | 516 | MAX3((size_t)MAXPATHLEN, // For dll_dir & friends. |
goetz@6556 | 517 | (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR), // extensions dir |
goetz@6556 | 518 | (size_t)MAXPATHLEN + sizeof(ENDORSED_DIR)); // endorsed dir |
goetz@6556 | 519 | char *buf = (char *)NEW_C_HEAP_ARRAY(char, bufsize, mtInternal); |
goetz@6556 | 520 | |
simonis@6465 | 521 | // sysclasspath, java_home, dll_dir |
goetz@6556 | 522 | { |
goetz@6556 | 523 | char *pslash; |
goetz@6556 | 524 | os::jvm_path(buf, bufsize); |
goetz@6556 | 525 | |
goetz@6556 | 526 | // Found the full path to libjvm.so. |
goetz@6556 | 527 | // Now cut the path to <java_home>/jre if we can. |
goetz@6556 | 528 | *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so. |
simonis@6465 | 529 | pslash = strrchr(buf, '/'); |
simonis@6465 | 530 | if (pslash != NULL) { |
goetz@6556 | 531 | *pslash = '\0'; // Get rid of /{client|server|hotspot}. |
goetz@6556 | 532 | } |
goetz@6556 | 533 | Arguments::set_dll_dir(buf); |
goetz@6556 | 534 | |
goetz@6556 | 535 | if (pslash != NULL) { |
simonis@6465 | 536 | pslash = strrchr(buf, '/'); |
simonis@6465 | 537 | if (pslash != NULL) { |
goetz@6556 | 538 | *pslash = '\0'; // Get rid of /<arch>. |
goetz@6556 | 539 | pslash = strrchr(buf, '/'); |
goetz@6556 | 540 | if (pslash != NULL) { |
goetz@6556 | 541 | *pslash = '\0'; // Get rid of /lib. |
goetz@6556 | 542 | } |
simonis@6465 | 543 | } |
simonis@6465 | 544 | } |
goetz@6556 | 545 | Arguments::set_java_home(buf); |
goetz@6556 | 546 | set_boot_path('/', ':'); |
goetz@6556 | 547 | } |
goetz@6556 | 548 | |
goetz@6556 | 549 | // Where to look for native libraries. |
goetz@6556 | 550 | |
goetz@6556 | 551 | // On Aix we get the user setting of LIBPATH. |
simonis@6465 | 552 | // Eventually, all the library path setting will be done here. |
goetz@6556 | 553 | // Get the user setting of LIBPATH. |
goetz@6556 | 554 | const char *v = ::getenv("LIBPATH"); |
goetz@6556 | 555 | const char *v_colon = ":"; |
goetz@6556 | 556 | if (v == NULL) { v = ""; v_colon = ""; } |
goetz@6556 | 557 | |
goetz@6556 | 558 | // Concatenate user and invariant part of ld_library_path. |
goetz@6556 | 559 | // That's +1 for the colon and +1 for the trailing '\0'. |
goetz@6556 | 560 | char *ld_library_path = (char *)NEW_C_HEAP_ARRAY(char, strlen(v) + 1 + sizeof(DEFAULT_LIBPATH) + 1, mtInternal); |
goetz@6556 | 561 | sprintf(ld_library_path, "%s%s" DEFAULT_LIBPATH, v, v_colon); |
simonis@6465 | 562 | Arguments::set_library_path(ld_library_path); |
goetz@6556 | 563 | FREE_C_HEAP_ARRAY(char, ld_library_path, mtInternal); |
goetz@6556 | 564 | |
goetz@6556 | 565 | // Extensions directories. |
goetz@6556 | 566 | sprintf(buf, "%s" EXTENSIONS_DIR, Arguments::get_java_home()); |
goetz@6556 | 567 | Arguments::set_ext_dirs(buf); |
simonis@6465 | 568 | |
simonis@6465 | 569 | // Endorsed standards default directory. |
goetz@6556 | 570 | sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); |
goetz@6556 | 571 | Arguments::set_endorsed_dirs(buf); |
goetz@6556 | 572 | |
goetz@6556 | 573 | FREE_C_HEAP_ARRAY(char, buf, mtInternal); |
goetz@6556 | 574 | |
simonis@6465 | 575 | #undef DEFAULT_LIBPATH |
simonis@6465 | 576 | #undef EXTENSIONS_DIR |
simonis@6465 | 577 | #undef ENDORSED_DIR |
simonis@6465 | 578 | } |
simonis@6465 | 579 | |
simonis@6465 | 580 | //////////////////////////////////////////////////////////////////////////////// |
simonis@6465 | 581 | // breakpoint support |
simonis@6465 | 582 | |
simonis@6465 | 583 | void os::breakpoint() { |
simonis@6465 | 584 | BREAKPOINT; |
simonis@6465 | 585 | } |
simonis@6465 | 586 | |
simonis@6465 | 587 | extern "C" void breakpoint() { |
simonis@6465 | 588 | // use debugger to set breakpoint here |
simonis@6465 | 589 | } |
simonis@6465 | 590 | |
simonis@6465 | 591 | //////////////////////////////////////////////////////////////////////////////// |
simonis@6465 | 592 | // signal support |
simonis@6465 | 593 | |
simonis@6465 | 594 | debug_only(static bool signal_sets_initialized = false); |
simonis@6465 | 595 | static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; |
simonis@6465 | 596 | |
simonis@6465 | 597 | bool os::Aix::is_sig_ignored(int sig) { |
simonis@6465 | 598 | struct sigaction oact; |
simonis@6465 | 599 | sigaction(sig, (struct sigaction*)NULL, &oact); |
simonis@6465 | 600 | void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) |
simonis@6465 | 601 | : CAST_FROM_FN_PTR(void*, oact.sa_handler); |
simonis@6465 | 602 | if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) |
simonis@6465 | 603 | return true; |
simonis@6465 | 604 | else |
simonis@6465 | 605 | return false; |
simonis@6465 | 606 | } |
simonis@6465 | 607 | |
simonis@6465 | 608 | void os::Aix::signal_sets_init() { |
simonis@6465 | 609 | // Should also have an assertion stating we are still single-threaded. |
simonis@6465 | 610 | assert(!signal_sets_initialized, "Already initialized"); |
simonis@6465 | 611 | // Fill in signals that are necessarily unblocked for all threads in |
simonis@6465 | 612 | // the VM. Currently, we unblock the following signals: |
simonis@6465 | 613 | // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden |
simonis@6465 | 614 | // by -Xrs (=ReduceSignalUsage)); |
simonis@6465 | 615 | // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all |
simonis@6465 | 616 | // other threads. The "ReduceSignalUsage" boolean tells us not to alter |
simonis@6465 | 617 | // the dispositions or masks wrt these signals. |
simonis@6465 | 618 | // Programs embedding the VM that want to use the above signals for their |
simonis@6465 | 619 | // own purposes must, at this time, use the "-Xrs" option to prevent |
simonis@6465 | 620 | // interference with shutdown hooks and BREAK_SIGNAL thread dumping. |
simonis@6465 | 621 | // (See bug 4345157, and other related bugs). |
simonis@6465 | 622 | // In reality, though, unblocking these signals is really a nop, since |
simonis@6465 | 623 | // these signals are not blocked by default. |
simonis@6465 | 624 | sigemptyset(&unblocked_sigs); |
simonis@6465 | 625 | sigemptyset(&allowdebug_blocked_sigs); |
simonis@6465 | 626 | sigaddset(&unblocked_sigs, SIGILL); |
simonis@6465 | 627 | sigaddset(&unblocked_sigs, SIGSEGV); |
simonis@6465 | 628 | sigaddset(&unblocked_sigs, SIGBUS); |
simonis@6465 | 629 | sigaddset(&unblocked_sigs, SIGFPE); |
simonis@6465 | 630 | sigaddset(&unblocked_sigs, SIGTRAP); |
simonis@6465 | 631 | sigaddset(&unblocked_sigs, SIGDANGER); |
simonis@6465 | 632 | sigaddset(&unblocked_sigs, SR_signum); |
simonis@6465 | 633 | |
simonis@6465 | 634 | if (!ReduceSignalUsage) { |
simonis@6465 | 635 | if (!os::Aix::is_sig_ignored(SHUTDOWN1_SIGNAL)) { |
simonis@6465 | 636 | sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); |
simonis@6465 | 637 | sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); |
simonis@6465 | 638 | } |
simonis@6465 | 639 | if (!os::Aix::is_sig_ignored(SHUTDOWN2_SIGNAL)) { |
simonis@6465 | 640 | sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); |
simonis@6465 | 641 | sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); |
simonis@6465 | 642 | } |
simonis@6465 | 643 | if (!os::Aix::is_sig_ignored(SHUTDOWN3_SIGNAL)) { |
simonis@6465 | 644 | sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); |
simonis@6465 | 645 | sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); |
simonis@6465 | 646 | } |
simonis@6465 | 647 | } |
simonis@6465 | 648 | // Fill in signals that are blocked by all but the VM thread. |
simonis@6465 | 649 | sigemptyset(&vm_sigs); |
simonis@6465 | 650 | if (!ReduceSignalUsage) |
simonis@6465 | 651 | sigaddset(&vm_sigs, BREAK_SIGNAL); |
simonis@6465 | 652 | debug_only(signal_sets_initialized = true); |
simonis@6465 | 653 | } |
simonis@6465 | 654 | |
simonis@6465 | 655 | // These are signals that are unblocked while a thread is running Java. |
simonis@6465 | 656 | // (For some reason, they get blocked by default.) |
simonis@6465 | 657 | sigset_t* os::Aix::unblocked_signals() { |
simonis@6465 | 658 | assert(signal_sets_initialized, "Not initialized"); |
simonis@6465 | 659 | return &unblocked_sigs; |
simonis@6465 | 660 | } |
simonis@6465 | 661 | |
simonis@6465 | 662 | // These are the signals that are blocked while a (non-VM) thread is |
simonis@6465 | 663 | // running Java. Only the VM thread handles these signals. |
simonis@6465 | 664 | sigset_t* os::Aix::vm_signals() { |
simonis@6465 | 665 | assert(signal_sets_initialized, "Not initialized"); |
simonis@6465 | 666 | return &vm_sigs; |
simonis@6465 | 667 | } |
simonis@6465 | 668 | |
simonis@6465 | 669 | // These are signals that are blocked during cond_wait to allow debugger in |
simonis@6465 | 670 | sigset_t* os::Aix::allowdebug_blocked_signals() { |
simonis@6465 | 671 | assert(signal_sets_initialized, "Not initialized"); |
simonis@6465 | 672 | return &allowdebug_blocked_sigs; |
simonis@6465 | 673 | } |
simonis@6465 | 674 | |
simonis@6465 | 675 | void os::Aix::hotspot_sigmask(Thread* thread) { |
simonis@6465 | 676 | |
simonis@6465 | 677 | //Save caller's signal mask before setting VM signal mask |
simonis@6465 | 678 | sigset_t caller_sigmask; |
simonis@6465 | 679 | pthread_sigmask(SIG_BLOCK, NULL, &caller_sigmask); |
simonis@6465 | 680 | |
simonis@6465 | 681 | OSThread* osthread = thread->osthread(); |
simonis@6465 | 682 | osthread->set_caller_sigmask(caller_sigmask); |
simonis@6465 | 683 | |
simonis@6465 | 684 | pthread_sigmask(SIG_UNBLOCK, os::Aix::unblocked_signals(), NULL); |
simonis@6465 | 685 | |
simonis@6465 | 686 | if (!ReduceSignalUsage) { |
simonis@6465 | 687 | if (thread->is_VM_thread()) { |
simonis@6465 | 688 | // Only the VM thread handles BREAK_SIGNAL ... |
simonis@6465 | 689 | pthread_sigmask(SIG_UNBLOCK, vm_signals(), NULL); |
simonis@6465 | 690 | } else { |
simonis@6465 | 691 | // ... all other threads block BREAK_SIGNAL |
simonis@6465 | 692 | pthread_sigmask(SIG_BLOCK, vm_signals(), NULL); |
simonis@6465 | 693 | } |
simonis@6465 | 694 | } |
simonis@6465 | 695 | } |
simonis@6465 | 696 | |
simonis@6465 | 697 | // retrieve memory information. |
simonis@6465 | 698 | // Returns false if something went wrong; |
simonis@6465 | 699 | // content of pmi undefined in this case. |
simonis@6465 | 700 | bool os::Aix::get_meminfo(meminfo_t* pmi) { |
simonis@6465 | 701 | |
simonis@6465 | 702 | assert(pmi, "get_meminfo: invalid parameter"); |
simonis@6465 | 703 | |
simonis@6465 | 704 | memset(pmi, 0, sizeof(meminfo_t)); |
simonis@6465 | 705 | |
simonis@6465 | 706 | if (os::Aix::on_pase()) { |
simonis@6465 | 707 | |
simonis@6465 | 708 | Unimplemented(); |
simonis@6465 | 709 | return false; |
simonis@6465 | 710 | |
simonis@6465 | 711 | } else { |
simonis@6465 | 712 | |
simonis@6465 | 713 | // On AIX, I use the (dynamically loaded) perfstat library to retrieve memory statistics |
simonis@6465 | 714 | // See: |
simonis@6465 | 715 | // http://publib.boulder.ibm.com/infocenter/systems/index.jsp |
simonis@6465 | 716 | // ?topic=/com.ibm.aix.basetechref/doc/basetrf1/perfstat_memtot.htm |
simonis@6465 | 717 | // http://publib.boulder.ibm.com/infocenter/systems/index.jsp |
simonis@6465 | 718 | // ?topic=/com.ibm.aix.files/doc/aixfiles/libperfstat.h.htm |
simonis@6465 | 719 | |
simonis@6465 | 720 | perfstat_memory_total_t psmt; |
simonis@6465 | 721 | memset (&psmt, '\0', sizeof(psmt)); |
simonis@6465 | 722 | const int rc = libperfstat::perfstat_memory_total(NULL, &psmt, sizeof(psmt), 1); |
simonis@6465 | 723 | if (rc == -1) { |
simonis@6465 | 724 | fprintf(stderr, "perfstat_memory_total() failed (errno=%d)\n", errno); |
simonis@6465 | 725 | assert(0, "perfstat_memory_total() failed"); |
simonis@6465 | 726 | return false; |
simonis@6465 | 727 | } |
simonis@6465 | 728 | |
simonis@6465 | 729 | assert(rc == 1, "perfstat_memory_total() - weird return code"); |
simonis@6465 | 730 | |
simonis@6465 | 731 | // excerpt from |
simonis@6465 | 732 | // http://publib.boulder.ibm.com/infocenter/systems/index.jsp |
simonis@6465 | 733 | // ?topic=/com.ibm.aix.files/doc/aixfiles/libperfstat.h.htm |
simonis@6465 | 734 | // The fields of perfstat_memory_total_t: |
simonis@6465 | 735 | // u_longlong_t virt_total Total virtual memory (in 4 KB pages). |
simonis@6465 | 736 | // u_longlong_t real_total Total real memory (in 4 KB pages). |
simonis@6465 | 737 | // u_longlong_t real_free Free real memory (in 4 KB pages). |
simonis@6465 | 738 | // u_longlong_t pgsp_total Total paging space (in 4 KB pages). |
simonis@6465 | 739 | // u_longlong_t pgsp_free Free paging space (in 4 KB pages). |
simonis@6465 | 740 | |
simonis@6465 | 741 | pmi->virt_total = psmt.virt_total * 4096; |
simonis@6465 | 742 | pmi->real_total = psmt.real_total * 4096; |
simonis@6465 | 743 | pmi->real_free = psmt.real_free * 4096; |
simonis@6465 | 744 | pmi->pgsp_total = psmt.pgsp_total * 4096; |
simonis@6465 | 745 | pmi->pgsp_free = psmt.pgsp_free * 4096; |
simonis@6465 | 746 | |
simonis@6465 | 747 | return true; |
simonis@6465 | 748 | |
simonis@6465 | 749 | } |
simonis@6465 | 750 | } // end os::Aix::get_meminfo |
simonis@6465 | 751 | |
simonis@6465 | 752 | // Retrieve global cpu information. |
simonis@6465 | 753 | // Returns false if something went wrong; |
simonis@6465 | 754 | // the content of pci is undefined in this case. |
simonis@6465 | 755 | bool os::Aix::get_cpuinfo(cpuinfo_t* pci) { |
simonis@6465 | 756 | assert(pci, "get_cpuinfo: invalid parameter"); |
simonis@6465 | 757 | memset(pci, 0, sizeof(cpuinfo_t)); |
simonis@6465 | 758 | |
simonis@6465 | 759 | perfstat_cpu_total_t psct; |
simonis@6465 | 760 | memset (&psct, '\0', sizeof(psct)); |
simonis@6465 | 761 | |
simonis@6465 | 762 | if (-1 == libperfstat::perfstat_cpu_total(NULL, &psct, sizeof(perfstat_cpu_total_t), 1)) { |
simonis@6465 | 763 | fprintf(stderr, "perfstat_cpu_total() failed (errno=%d)\n", errno); |
simonis@6465 | 764 | assert(0, "perfstat_cpu_total() failed"); |
simonis@6465 | 765 | return false; |
simonis@6465 | 766 | } |
simonis@6465 | 767 | |
simonis@6465 | 768 | // global cpu information |
simonis@6465 | 769 | strcpy (pci->description, psct.description); |
simonis@6465 | 770 | pci->processorHZ = psct.processorHZ; |
simonis@6465 | 771 | pci->ncpus = psct.ncpus; |
simonis@6465 | 772 | os::Aix::_logical_cpus = psct.ncpus; |
simonis@6465 | 773 | for (int i = 0; i < 3; i++) { |
simonis@6465 | 774 | pci->loadavg[i] = (double) psct.loadavg[i] / (1 << SBITS); |
simonis@6465 | 775 | } |
simonis@6465 | 776 | |
simonis@6465 | 777 | // get the processor version from _system_configuration |
simonis@6465 | 778 | switch (_system_configuration.version) { |
simonis@6465 | 779 | case PV_7: |
simonis@6465 | 780 | strcpy(pci->version, "Power PC 7"); |
simonis@6465 | 781 | break; |
simonis@6465 | 782 | case PV_6_1: |
simonis@6465 | 783 | strcpy(pci->version, "Power PC 6 DD1.x"); |
simonis@6465 | 784 | break; |
simonis@6465 | 785 | case PV_6: |
simonis@6465 | 786 | strcpy(pci->version, "Power PC 6"); |
simonis@6465 | 787 | break; |
simonis@6465 | 788 | case PV_5: |
simonis@6465 | 789 | strcpy(pci->version, "Power PC 5"); |
simonis@6465 | 790 | break; |
simonis@6465 | 791 | case PV_5_2: |
simonis@6465 | 792 | strcpy(pci->version, "Power PC 5_2"); |
simonis@6465 | 793 | break; |
simonis@6465 | 794 | case PV_5_3: |
simonis@6465 | 795 | strcpy(pci->version, "Power PC 5_3"); |
simonis@6465 | 796 | break; |
simonis@6465 | 797 | case PV_5_Compat: |
simonis@6465 | 798 | strcpy(pci->version, "PV_5_Compat"); |
simonis@6465 | 799 | break; |
simonis@6465 | 800 | case PV_6_Compat: |
simonis@6465 | 801 | strcpy(pci->version, "PV_6_Compat"); |
simonis@6465 | 802 | break; |
simonis@6465 | 803 | case PV_7_Compat: |
simonis@6465 | 804 | strcpy(pci->version, "PV_7_Compat"); |
simonis@6465 | 805 | break; |
simonis@6465 | 806 | default: |
simonis@6465 | 807 | strcpy(pci->version, "unknown"); |
simonis@6465 | 808 | } |
simonis@6465 | 809 | |
simonis@6465 | 810 | return true; |
simonis@6465 | 811 | |
simonis@6465 | 812 | } //end os::Aix::get_cpuinfo |
simonis@6465 | 813 | |
simonis@6465 | 814 | ////////////////////////////////////////////////////////////////////////////// |
simonis@6465 | 815 | // detecting pthread library |
simonis@6465 | 816 | |
simonis@6465 | 817 | void os::Aix::libpthread_init() { |
simonis@6465 | 818 | return; |
simonis@6465 | 819 | } |
simonis@6465 | 820 | |
simonis@6465 | 821 | ////////////////////////////////////////////////////////////////////////////// |
simonis@6465 | 822 | // create new thread |
simonis@6465 | 823 | |
simonis@6465 | 824 | // Thread start routine for all newly created threads |
simonis@6465 | 825 | static void *java_start(Thread *thread) { |
simonis@6465 | 826 | |
simonis@6465 | 827 | // find out my own stack dimensions |
simonis@6465 | 828 | { |
simonis@6465 | 829 | // actually, this should do exactly the same as thread->record_stack_base_and_size... |
simonis@6465 | 830 | address base = 0; |
simonis@6465 | 831 | size_t size = 0; |
simonis@6465 | 832 | query_stack_dimensions(&base, &size); |
simonis@6465 | 833 | thread->set_stack_base(base); |
simonis@6465 | 834 | thread->set_stack_size(size); |
simonis@6465 | 835 | } |
simonis@6465 | 836 | |
simonis@6465 | 837 | // Do some sanity checks. |
simonis@6465 | 838 | CHECK_CURRENT_STACK_PTR(thread->stack_base(), thread->stack_size()); |
simonis@6465 | 839 | |
simonis@6465 | 840 | // Try to randomize the cache line index of hot stack frames. |
simonis@6465 | 841 | // This helps when threads of the same stack traces evict each other's |
simonis@6465 | 842 | // cache lines. The threads can be either from the same JVM instance, or |
simonis@6465 | 843 | // from different JVM instances. The benefit is especially true for |
simonis@6465 | 844 | // processors with hyperthreading technology. |
simonis@6465 | 845 | |
simonis@6465 | 846 | static int counter = 0; |
simonis@6465 | 847 | int pid = os::current_process_id(); |
simonis@6465 | 848 | alloca(((pid ^ counter++) & 7) * 128); |
simonis@6465 | 849 | |
simonis@6465 | 850 | ThreadLocalStorage::set_thread(thread); |
simonis@6465 | 851 | |
simonis@6465 | 852 | OSThread* osthread = thread->osthread(); |
simonis@6465 | 853 | |
simonis@6465 | 854 | // thread_id is kernel thread id (similar to Solaris LWP id) |
simonis@6465 | 855 | osthread->set_thread_id(os::Aix::gettid()); |
simonis@6465 | 856 | |
simonis@6465 | 857 | // initialize signal mask for this thread |
simonis@6465 | 858 | os::Aix::hotspot_sigmask(thread); |
simonis@6465 | 859 | |
simonis@6465 | 860 | // initialize floating point control register |
simonis@6465 | 861 | os::Aix::init_thread_fpu_state(); |
simonis@6465 | 862 | |
simonis@6465 | 863 | assert(osthread->get_state() == RUNNABLE, "invalid os thread state"); |
simonis@6465 | 864 | |
simonis@6465 | 865 | // call one more level start routine |
simonis@6465 | 866 | thread->run(); |
simonis@6465 | 867 | |
simonis@6465 | 868 | return 0; |
simonis@6465 | 869 | } |
simonis@6465 | 870 | |
simonis@6465 | 871 | bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { |
simonis@6465 | 872 | |
simonis@6465 | 873 | // We want the whole function to be synchronized. |
simonis@6465 | 874 | ThreadCritical cs; |
simonis@6465 | 875 | |
simonis@6465 | 876 | assert(thread->osthread() == NULL, "caller responsible"); |
simonis@6465 | 877 | |
simonis@6465 | 878 | // Allocate the OSThread object |
simonis@6465 | 879 | OSThread* osthread = new OSThread(NULL, NULL); |
simonis@6465 | 880 | if (osthread == NULL) { |
simonis@6465 | 881 | return false; |
simonis@6465 | 882 | } |
simonis@6465 | 883 | |
simonis@6465 | 884 | // set the correct thread state |
simonis@6465 | 885 | osthread->set_thread_type(thr_type); |
simonis@6465 | 886 | |
simonis@6465 | 887 | // Initial state is ALLOCATED but not INITIALIZED |
simonis@6465 | 888 | osthread->set_state(ALLOCATED); |
simonis@6465 | 889 | |
simonis@6465 | 890 | thread->set_osthread(osthread); |
simonis@6465 | 891 | |
simonis@6465 | 892 | // init thread attributes |
simonis@6465 | 893 | pthread_attr_t attr; |
simonis@6465 | 894 | pthread_attr_init(&attr); |
simonis@6465 | 895 | guarantee(pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED) == 0, "???"); |
simonis@6465 | 896 | |
simonis@6465 | 897 | // Make sure we run in 1:1 kernel-user-thread mode. |
simonis@6465 | 898 | if (os::Aix::on_aix()) { |
simonis@6465 | 899 | guarantee(pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM) == 0, "???"); |
simonis@6465 | 900 | guarantee(pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED) == 0, "???"); |
simonis@6465 | 901 | } // end: aix |
simonis@6465 | 902 | |
simonis@6465 | 903 | // Start in suspended state, and in os::thread_start, wake the thread up. |
simonis@6465 | 904 | guarantee(pthread_attr_setsuspendstate_np(&attr, PTHREAD_CREATE_SUSPENDED_NP) == 0, "???"); |
simonis@6465 | 905 | |
simonis@6465 | 906 | // calculate stack size if it's not specified by caller |
simonis@6465 | 907 | if (os::Aix::supports_variable_stack_size()) { |
simonis@6465 | 908 | if (stack_size == 0) { |
simonis@6465 | 909 | stack_size = os::Aix::default_stack_size(thr_type); |
simonis@6465 | 910 | |
simonis@6465 | 911 | switch (thr_type) { |
simonis@6465 | 912 | case os::java_thread: |
simonis@6465 | 913 | // Java threads use ThreadStackSize whose default value can be changed with the flag -Xss. |
simonis@6465 | 914 | assert(JavaThread::stack_size_at_create() > 0, "this should be set"); |
simonis@6465 | 915 | stack_size = JavaThread::stack_size_at_create(); |
simonis@6465 | 916 | break; |
simonis@6465 | 917 | case os::compiler_thread: |
simonis@6465 | 918 | if (CompilerThreadStackSize > 0) { |
simonis@6465 | 919 | stack_size = (size_t)(CompilerThreadStackSize * K); |
simonis@6465 | 920 | break; |
simonis@6465 | 921 | } // else fall through: |
simonis@6465 | 922 | // use VMThreadStackSize if CompilerThreadStackSize is not defined |
simonis@6465 | 923 | case os::vm_thread: |
simonis@6465 | 924 | case os::pgc_thread: |
simonis@6465 | 925 | case os::cgc_thread: |
simonis@6465 | 926 | case os::watcher_thread: |
simonis@6465 | 927 | if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); |
simonis@6465 | 928 | break; |
simonis@6465 | 929 | } |
simonis@6465 | 930 | } |
simonis@6465 | 931 | |
simonis@6465 | 932 | stack_size = MAX2(stack_size, os::Aix::min_stack_allowed); |
simonis@6465 | 933 | pthread_attr_setstacksize(&attr, stack_size); |
simonis@6465 | 934 | } //else let thread_create() pick the default value (96 K on AIX) |
simonis@6465 | 935 | |
simonis@6465 | 936 | pthread_t tid; |
simonis@6465 | 937 | int ret = pthread_create(&tid, &attr, (void* (*)(void*)) java_start, thread); |
simonis@6465 | 938 | |
simonis@6465 | 939 | pthread_attr_destroy(&attr); |
simonis@6465 | 940 | |
simonis@6465 | 941 | if (ret != 0) { |
simonis@6465 | 942 | if (PrintMiscellaneous && (Verbose || WizardMode)) { |
simonis@6465 | 943 | perror("pthread_create()"); |
simonis@6465 | 944 | } |
simonis@6465 | 945 | // Need to clean up stuff we've allocated so far |
simonis@6465 | 946 | thread->set_osthread(NULL); |
simonis@6465 | 947 | delete osthread; |
simonis@6465 | 948 | return false; |
simonis@6465 | 949 | } |
simonis@6465 | 950 | |
simonis@6465 | 951 | // Store pthread info into the OSThread |
simonis@6465 | 952 | osthread->set_pthread_id(tid); |
simonis@6465 | 953 | |
simonis@6465 | 954 | return true; |
simonis@6465 | 955 | } |
simonis@6465 | 956 | |
simonis@6465 | 957 | ///////////////////////////////////////////////////////////////////////////// |
simonis@6465 | 958 | // attach existing thread |
simonis@6465 | 959 | |
simonis@6465 | 960 | // bootstrap the main thread |
simonis@6465 | 961 | bool os::create_main_thread(JavaThread* thread) { |
simonis@6465 | 962 | assert(os::Aix::_main_thread == pthread_self(), "should be called inside main thread"); |
simonis@6465 | 963 | return create_attached_thread(thread); |
simonis@6465 | 964 | } |
simonis@6465 | 965 | |
simonis@6465 | 966 | bool os::create_attached_thread(JavaThread* thread) { |
simonis@6465 | 967 | #ifdef ASSERT |
simonis@6465 | 968 | thread->verify_not_published(); |
simonis@6465 | 969 | #endif |
simonis@6465 | 970 | |
simonis@6465 | 971 | // Allocate the OSThread object |
simonis@6465 | 972 | OSThread* osthread = new OSThread(NULL, NULL); |
simonis@6465 | 973 | |
simonis@6465 | 974 | if (osthread == NULL) { |
simonis@6465 | 975 | return false; |
simonis@6465 | 976 | } |
simonis@6465 | 977 | |
simonis@6465 | 978 | // Store pthread info into the OSThread |
simonis@6465 | 979 | osthread->set_thread_id(os::Aix::gettid()); |
simonis@6465 | 980 | osthread->set_pthread_id(::pthread_self()); |
simonis@6465 | 981 | |
simonis@6465 | 982 | // initialize floating point control register |
simonis@6465 | 983 | os::Aix::init_thread_fpu_state(); |
simonis@6465 | 984 | |
simonis@6465 | 985 | // some sanity checks |
simonis@6465 | 986 | CHECK_CURRENT_STACK_PTR(thread->stack_base(), thread->stack_size()); |
simonis@6465 | 987 | |
simonis@6465 | 988 | // Initial thread state is RUNNABLE |
simonis@6465 | 989 | osthread->set_state(RUNNABLE); |
simonis@6465 | 990 | |
simonis@6465 | 991 | thread->set_osthread(osthread); |
simonis@6465 | 992 | |
simonis@6465 | 993 | if (UseNUMA) { |
simonis@6465 | 994 | int lgrp_id = os::numa_get_group_id(); |
simonis@6465 | 995 | if (lgrp_id != -1) { |
simonis@6465 | 996 | thread->set_lgrp_id(lgrp_id); |
simonis@6465 | 997 | } |
simonis@6465 | 998 | } |
simonis@6465 | 999 | |
simonis@6465 | 1000 | // initialize signal mask for this thread |
simonis@6465 | 1001 | // and save the caller's signal mask |
simonis@6465 | 1002 | os::Aix::hotspot_sigmask(thread); |
simonis@6465 | 1003 | |
simonis@6465 | 1004 | return true; |
simonis@6465 | 1005 | } |
simonis@6465 | 1006 | |
simonis@6465 | 1007 | void os::pd_start_thread(Thread* thread) { |
simonis@6465 | 1008 | int status = pthread_continue_np(thread->osthread()->pthread_id()); |
simonis@6465 | 1009 | assert(status == 0, "thr_continue failed"); |
simonis@6465 | 1010 | } |
simonis@6465 | 1011 | |
simonis@6465 | 1012 | // Free OS resources related to the OSThread |
simonis@6465 | 1013 | void os::free_thread(OSThread* osthread) { |
simonis@6465 | 1014 | assert(osthread != NULL, "osthread not set"); |
simonis@6465 | 1015 | |
simonis@6465 | 1016 | if (Thread::current()->osthread() == osthread) { |
simonis@6465 | 1017 | // Restore caller's signal mask |
simonis@6465 | 1018 | sigset_t sigmask = osthread->caller_sigmask(); |
simonis@6465 | 1019 | pthread_sigmask(SIG_SETMASK, &sigmask, NULL); |
simonis@6465 | 1020 | } |
simonis@6465 | 1021 | |
simonis@6465 | 1022 | delete osthread; |
simonis@6465 | 1023 | } |
simonis@6465 | 1024 | |
simonis@6465 | 1025 | ////////////////////////////////////////////////////////////////////////////// |
simonis@6465 | 1026 | // thread local storage |
simonis@6465 | 1027 | |
simonis@6465 | 1028 | int os::allocate_thread_local_storage() { |
simonis@6465 | 1029 | pthread_key_t key; |
simonis@6465 | 1030 | int rslt = pthread_key_create(&key, NULL); |
simonis@6465 | 1031 | assert(rslt == 0, "cannot allocate thread local storage"); |
simonis@6465 | 1032 | return (int)key; |
simonis@6465 | 1033 | } |
simonis@6465 | 1034 | |
simonis@6465 | 1035 | // Note: This is currently not used by VM, as we don't destroy TLS key |
simonis@6465 | 1036 | // on VM exit. |
simonis@6465 | 1037 | void os::free_thread_local_storage(int index) { |
simonis@6465 | 1038 | int rslt = pthread_key_delete((pthread_key_t)index); |
simonis@6465 | 1039 | assert(rslt == 0, "invalid index"); |
simonis@6465 | 1040 | } |
simonis@6465 | 1041 | |
simonis@6465 | 1042 | void os::thread_local_storage_at_put(int index, void* value) { |
simonis@6465 | 1043 | int rslt = pthread_setspecific((pthread_key_t)index, value); |
simonis@6465 | 1044 | assert(rslt == 0, "pthread_setspecific failed"); |
simonis@6465 | 1045 | } |
simonis@6465 | 1046 | |
simonis@6465 | 1047 | extern "C" Thread* get_thread() { |
simonis@6465 | 1048 | return ThreadLocalStorage::thread(); |
simonis@6465 | 1049 | } |
simonis@6465 | 1050 | |
simonis@6465 | 1051 | //////////////////////////////////////////////////////////////////////////////// |
simonis@6465 | 1052 | // time support |
simonis@6465 | 1053 | |
simonis@6465 | 1054 | // Time since start-up in seconds to a fine granularity. |
simonis@6465 | 1055 | // Used by VMSelfDestructTimer and the MemProfiler. |
simonis@6465 | 1056 | double os::elapsedTime() { |
simonis@6465 | 1057 | return (double)(os::elapsed_counter()) * 0.000001; |
simonis@6465 | 1058 | } |
simonis@6465 | 1059 | |
simonis@6465 | 1060 | jlong os::elapsed_counter() { |
simonis@6465 | 1061 | timeval time; |
simonis@6465 | 1062 | int status = gettimeofday(&time, NULL); |
simonis@6465 | 1063 | return jlong(time.tv_sec) * 1000 * 1000 + jlong(time.tv_usec) - initial_time_count; |
simonis@6465 | 1064 | } |
simonis@6465 | 1065 | |
simonis@6465 | 1066 | jlong os::elapsed_frequency() { |
simonis@6465 | 1067 | return (1000 * 1000); |
simonis@6465 | 1068 | } |
simonis@6465 | 1069 | |
simonis@6465 | 1070 | // For now, we say that linux does not support vtime. I have no idea |
simonis@6465 | 1071 | // whether it can actually be made to (DLD, 9/13/05). |
simonis@6465 | 1072 | |
simonis@6465 | 1073 | bool os::supports_vtime() { return false; } |
simonis@6465 | 1074 | bool os::enable_vtime() { return false; } |
simonis@6465 | 1075 | bool os::vtime_enabled() { return false; } |
simonis@6465 | 1076 | double os::elapsedVTime() { |
simonis@6465 | 1077 | // better than nothing, but not much |
simonis@6465 | 1078 | return elapsedTime(); |
simonis@6465 | 1079 | } |
simonis@6465 | 1080 | |
simonis@6465 | 1081 | jlong os::javaTimeMillis() { |
simonis@6465 | 1082 | timeval time; |
simonis@6465 | 1083 | int status = gettimeofday(&time, NULL); |
simonis@6465 | 1084 | assert(status != -1, "aix error at gettimeofday()"); |
simonis@6465 | 1085 | return jlong(time.tv_sec) * 1000 + jlong(time.tv_usec / 1000); |
simonis@6465 | 1086 | } |
simonis@6465 | 1087 | |
simonis@6465 | 1088 | // We need to manually declare mread_real_time, |
simonis@6465 | 1089 | // because IBM didn't provide a prototype in time.h. |
simonis@6465 | 1090 | // (they probably only ever tested in C, not C++) |
simonis@6465 | 1091 | extern "C" |
simonis@6465 | 1092 | int mread_real_time(timebasestruct_t *t, size_t size_of_timebasestruct_t); |
simonis@6465 | 1093 | |
simonis@6465 | 1094 | jlong os::javaTimeNanos() { |
simonis@6465 | 1095 | if (os::Aix::on_pase()) { |
simonis@6465 | 1096 | Unimplemented(); |
simonis@6465 | 1097 | return 0; |
simonis@6465 | 1098 | } |
simonis@6465 | 1099 | else { |
simonis@6465 | 1100 | // On AIX use the precision of processors real time clock |
simonis@6465 | 1101 | // or time base registers. |
simonis@6465 | 1102 | timebasestruct_t time; |
simonis@6465 | 1103 | int rc; |
simonis@6465 | 1104 | |
simonis@6465 | 1105 | // If the CPU has a time register, it will be used and |
simonis@6465 | 1106 | // we have to convert to real time first. After convertion we have following data: |
simonis@6465 | 1107 | // time.tb_high [seconds since 00:00:00 UTC on 1.1.1970] |
simonis@6465 | 1108 | // time.tb_low [nanoseconds after the last full second above] |
simonis@6465 | 1109 | // We better use mread_real_time here instead of read_real_time |
simonis@6465 | 1110 | // to ensure that we will get a monotonic increasing time. |
simonis@6465 | 1111 | if (mread_real_time(&time, TIMEBASE_SZ) != RTC_POWER) { |
simonis@6465 | 1112 | rc = time_base_to_time(&time, TIMEBASE_SZ); |
simonis@6465 | 1113 | assert(rc != -1, "aix error at time_base_to_time()"); |
simonis@6465 | 1114 | } |
simonis@6465 | 1115 | return jlong(time.tb_high) * (1000 * 1000 * 1000) + jlong(time.tb_low); |
simonis@6465 | 1116 | } |
simonis@6465 | 1117 | } |
simonis@6465 | 1118 | |
simonis@6465 | 1119 | void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { |
simonis@6465 | 1120 | { |
simonis@6465 | 1121 | // gettimeofday - based on time in seconds since the Epoch thus does not wrap |
simonis@6465 | 1122 | info_ptr->max_value = ALL_64_BITS; |
simonis@6465 | 1123 | |
simonis@6465 | 1124 | // gettimeofday is a real time clock so it skips |
simonis@6465 | 1125 | info_ptr->may_skip_backward = true; |
simonis@6465 | 1126 | info_ptr->may_skip_forward = true; |
simonis@6465 | 1127 | } |
simonis@6465 | 1128 | |
simonis@6465 | 1129 | info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time |
simonis@6465 | 1130 | } |
simonis@6465 | 1131 | |
simonis@6465 | 1132 | // Return the real, user, and system times in seconds from an |
simonis@6465 | 1133 | // arbitrary fixed point in the past. |
simonis@6465 | 1134 | bool os::getTimesSecs(double* process_real_time, |
simonis@6465 | 1135 | double* process_user_time, |
simonis@6465 | 1136 | double* process_system_time) { |
goetz@6501 | 1137 | struct tms ticks; |
goetz@6501 | 1138 | clock_t real_ticks = times(&ticks); |
goetz@6501 | 1139 | |
goetz@6501 | 1140 | if (real_ticks == (clock_t) (-1)) { |
goetz@6501 | 1141 | return false; |
goetz@6501 | 1142 | } else { |
goetz@6501 | 1143 | double ticks_per_second = (double) clock_tics_per_sec; |
goetz@6501 | 1144 | *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; |
goetz@6501 | 1145 | *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; |
goetz@6501 | 1146 | *process_real_time = ((double) real_ticks) / ticks_per_second; |
goetz@6501 | 1147 | |
goetz@6501 | 1148 | return true; |
goetz@6501 | 1149 | } |
simonis@6465 | 1150 | } |
simonis@6465 | 1151 | |
simonis@6465 | 1152 | |
simonis@6465 | 1153 | char * os::local_time_string(char *buf, size_t buflen) { |
simonis@6465 | 1154 | struct tm t; |
simonis@6465 | 1155 | time_t long_time; |
simonis@6465 | 1156 | time(&long_time); |
simonis@6465 | 1157 | localtime_r(&long_time, &t); |
simonis@6465 | 1158 | jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", |
simonis@6465 | 1159 | t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, |
simonis@6465 | 1160 | t.tm_hour, t.tm_min, t.tm_sec); |
simonis@6465 | 1161 | return buf; |
simonis@6465 | 1162 | } |
simonis@6465 | 1163 | |
simonis@6465 | 1164 | struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { |
simonis@6465 | 1165 | return localtime_r(clock, res); |
simonis@6465 | 1166 | } |
simonis@6465 | 1167 | |
simonis@6465 | 1168 | //////////////////////////////////////////////////////////////////////////////// |
simonis@6465 | 1169 | // runtime exit support |
simonis@6465 | 1170 | |
simonis@6465 | 1171 | // Note: os::shutdown() might be called very early during initialization, or |
simonis@6465 | 1172 | // called from signal handler. Before adding something to os::shutdown(), make |
simonis@6465 | 1173 | // sure it is async-safe and can handle partially initialized VM. |
simonis@6465 | 1174 | void os::shutdown() { |
simonis@6465 | 1175 | |
simonis@6465 | 1176 | // allow PerfMemory to attempt cleanup of any persistent resources |
simonis@6465 | 1177 | perfMemory_exit(); |
simonis@6465 | 1178 | |
simonis@6465 | 1179 | // needs to remove object in file system |
simonis@6465 | 1180 | AttachListener::abort(); |
simonis@6465 | 1181 | |
simonis@6465 | 1182 | // flush buffered output, finish log files |
simonis@6465 | 1183 | ostream_abort(); |
simonis@6465 | 1184 | |
simonis@6465 | 1185 | // Check for abort hook |
simonis@6465 | 1186 | abort_hook_t abort_hook = Arguments::abort_hook(); |
simonis@6465 | 1187 | if (abort_hook != NULL) { |
simonis@6465 | 1188 | abort_hook(); |
simonis@6465 | 1189 | } |
simonis@6465 | 1190 | |
simonis@6465 | 1191 | } |
simonis@6465 | 1192 | |
simonis@6465 | 1193 | // Note: os::abort() might be called very early during initialization, or |
simonis@6465 | 1194 | // called from signal handler. Before adding something to os::abort(), make |
simonis@6465 | 1195 | // sure it is async-safe and can handle partially initialized VM. |
simonis@6465 | 1196 | void os::abort(bool dump_core) { |
simonis@6465 | 1197 | os::shutdown(); |
simonis@6465 | 1198 | if (dump_core) { |
simonis@6465 | 1199 | #ifndef PRODUCT |
simonis@6465 | 1200 | fdStream out(defaultStream::output_fd()); |
simonis@6465 | 1201 | out.print_raw("Current thread is "); |
simonis@6465 | 1202 | char buf[16]; |
simonis@6465 | 1203 | jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); |
simonis@6465 | 1204 | out.print_raw_cr(buf); |
simonis@6465 | 1205 | out.print_raw_cr("Dumping core ..."); |
simonis@6465 | 1206 | #endif |
simonis@6465 | 1207 | ::abort(); // dump core |
simonis@6465 | 1208 | } |
simonis@6465 | 1209 | |
simonis@6465 | 1210 | ::exit(1); |
simonis@6465 | 1211 | } |
simonis@6465 | 1212 | |
simonis@6465 | 1213 | // Die immediately, no exit hook, no abort hook, no cleanup. |
simonis@6465 | 1214 | void os::die() { |
simonis@6465 | 1215 | ::abort(); |
simonis@6465 | 1216 | } |
simonis@6465 | 1217 | |
simonis@6465 | 1218 | // This method is a copy of JDK's sysGetLastErrorString |
simonis@6465 | 1219 | // from src/solaris/hpi/src/system_md.c |
simonis@6465 | 1220 | |
simonis@6465 | 1221 | size_t os::lasterror(char *buf, size_t len) { |
simonis@6465 | 1222 | |
simonis@6465 | 1223 | if (errno == 0) return 0; |
simonis@6465 | 1224 | |
simonis@6465 | 1225 | const char *s = ::strerror(errno); |
simonis@6465 | 1226 | size_t n = ::strlen(s); |
simonis@6465 | 1227 | if (n >= len) { |
simonis@6465 | 1228 | n = len - 1; |
simonis@6465 | 1229 | } |
simonis@6465 | 1230 | ::strncpy(buf, s, n); |
simonis@6465 | 1231 | buf[n] = '\0'; |
simonis@6465 | 1232 | return n; |
simonis@6465 | 1233 | } |
simonis@6465 | 1234 | |
simonis@6465 | 1235 | intx os::current_thread_id() { return (intx)pthread_self(); } |
simonis@6465 | 1236 | int os::current_process_id() { |
simonis@6465 | 1237 | |
simonis@6465 | 1238 | // This implementation returns a unique pid, the pid of the |
simonis@6465 | 1239 | // launcher thread that starts the vm 'process'. |
simonis@6465 | 1240 | |
simonis@6465 | 1241 | // Under POSIX, getpid() returns the same pid as the |
simonis@6465 | 1242 | // launcher thread rather than a unique pid per thread. |
simonis@6465 | 1243 | // Use gettid() if you want the old pre NPTL behaviour. |
simonis@6465 | 1244 | |
simonis@6465 | 1245 | // if you are looking for the result of a call to getpid() that |
simonis@6465 | 1246 | // returns a unique pid for the calling thread, then look at the |
simonis@6465 | 1247 | // OSThread::thread_id() method in osThread_linux.hpp file |
simonis@6465 | 1248 | |
simonis@6465 | 1249 | return (int)(_initial_pid ? _initial_pid : getpid()); |
simonis@6465 | 1250 | } |
simonis@6465 | 1251 | |
simonis@6465 | 1252 | // DLL functions |
simonis@6465 | 1253 | |
simonis@6465 | 1254 | const char* os::dll_file_extension() { return ".so"; } |
simonis@6465 | 1255 | |
simonis@6465 | 1256 | // This must be hard coded because it's the system's temporary |
simonis@6465 | 1257 | // directory not the java application's temp directory, ala java.io.tmpdir. |
simonis@6465 | 1258 | const char* os::get_temp_directory() { return "/tmp"; } |
simonis@6465 | 1259 | |
simonis@6465 | 1260 | static bool file_exists(const char* filename) { |
simonis@6465 | 1261 | struct stat statbuf; |
simonis@6465 | 1262 | if (filename == NULL || strlen(filename) == 0) { |
simonis@6465 | 1263 | return false; |
simonis@6465 | 1264 | } |
simonis@6465 | 1265 | return os::stat(filename, &statbuf) == 0; |
simonis@6465 | 1266 | } |
simonis@6465 | 1267 | |
simonis@6465 | 1268 | bool os::dll_build_name(char* buffer, size_t buflen, |
simonis@6465 | 1269 | const char* pname, const char* fname) { |
simonis@6465 | 1270 | bool retval = false; |
simonis@6465 | 1271 | // Copied from libhpi |
simonis@6465 | 1272 | const size_t pnamelen = pname ? strlen(pname) : 0; |
simonis@6465 | 1273 | |
simonis@6465 | 1274 | // Return error on buffer overflow. |
simonis@6465 | 1275 | if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { |
simonis@6465 | 1276 | *buffer = '\0'; |
simonis@6465 | 1277 | return retval; |
simonis@6465 | 1278 | } |
simonis@6465 | 1279 | |
simonis@6465 | 1280 | if (pnamelen == 0) { |
simonis@6465 | 1281 | snprintf(buffer, buflen, "lib%s.so", fname); |
simonis@6465 | 1282 | retval = true; |
simonis@6465 | 1283 | } else if (strchr(pname, *os::path_separator()) != NULL) { |
simonis@6465 | 1284 | int n; |
simonis@6465 | 1285 | char** pelements = split_path(pname, &n); |
simonis@6465 | 1286 | for (int i = 0; i < n; i++) { |
simonis@6465 | 1287 | // Really shouldn't be NULL, but check can't hurt |
simonis@6465 | 1288 | if (pelements[i] == NULL || strlen(pelements[i]) == 0) { |
simonis@6465 | 1289 | continue; // skip the empty path values |
simonis@6465 | 1290 | } |
simonis@6465 | 1291 | snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); |
simonis@6465 | 1292 | if (file_exists(buffer)) { |
simonis@6465 | 1293 | retval = true; |
simonis@6465 | 1294 | break; |
simonis@6465 | 1295 | } |
simonis@6465 | 1296 | } |
simonis@6465 | 1297 | // release the storage |
simonis@6465 | 1298 | for (int i = 0; i < n; i++) { |
simonis@6465 | 1299 | if (pelements[i] != NULL) { |
simonis@6465 | 1300 | FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal); |
simonis@6465 | 1301 | } |
simonis@6465 | 1302 | } |
simonis@6465 | 1303 | if (pelements != NULL) { |
simonis@6465 | 1304 | FREE_C_HEAP_ARRAY(char*, pelements, mtInternal); |
simonis@6465 | 1305 | } |
simonis@6465 | 1306 | } else { |
simonis@6465 | 1307 | snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); |
simonis@6465 | 1308 | retval = true; |
simonis@6465 | 1309 | } |
simonis@6465 | 1310 | return retval; |
simonis@6465 | 1311 | } |
simonis@6465 | 1312 | |
simonis@6465 | 1313 | // Check if addr is inside libjvm.so. |
simonis@6465 | 1314 | bool os::address_is_in_vm(address addr) { |
simonis@6465 | 1315 | |
simonis@6465 | 1316 | // Input could be a real pc or a function pointer literal. The latter |
simonis@6465 | 1317 | // would be a function descriptor residing in the data segment of a module. |
simonis@6465 | 1318 | |
simonis@6465 | 1319 | const LoadedLibraryModule* lib = LoadedLibraries::find_for_text_address(addr); |
simonis@6465 | 1320 | if (lib) { |
simonis@6465 | 1321 | if (strcmp(lib->get_shortname(), "libjvm.so") == 0) { |
simonis@6465 | 1322 | return true; |
simonis@6465 | 1323 | } else { |
simonis@6465 | 1324 | return false; |
simonis@6465 | 1325 | } |
simonis@6465 | 1326 | } else { |
simonis@6465 | 1327 | lib = LoadedLibraries::find_for_data_address(addr); |
simonis@6465 | 1328 | if (lib) { |
simonis@6465 | 1329 | if (strcmp(lib->get_shortname(), "libjvm.so") == 0) { |
simonis@6465 | 1330 | return true; |
simonis@6465 | 1331 | } else { |
simonis@6465 | 1332 | return false; |
simonis@6465 | 1333 | } |
simonis@6465 | 1334 | } else { |
simonis@6465 | 1335 | return false; |
simonis@6465 | 1336 | } |
simonis@6465 | 1337 | } |
simonis@6465 | 1338 | } |
simonis@6465 | 1339 | |
simonis@6465 | 1340 | // Resolve an AIX function descriptor literal to a code pointer. |
simonis@6465 | 1341 | // If the input is a valid code pointer to a text segment of a loaded module, |
simonis@6465 | 1342 | // it is returned unchanged. |
simonis@6465 | 1343 | // If the input is a valid AIX function descriptor, it is resolved to the |
simonis@6465 | 1344 | // code entry point. |
simonis@6465 | 1345 | // If the input is neither a valid function descriptor nor a valid code pointer, |
simonis@6465 | 1346 | // NULL is returned. |
simonis@6465 | 1347 | static address resolve_function_descriptor_to_code_pointer(address p) { |
simonis@6465 | 1348 | |
simonis@6465 | 1349 | const LoadedLibraryModule* lib = LoadedLibraries::find_for_text_address(p); |
simonis@6465 | 1350 | if (lib) { |
simonis@6465 | 1351 | // its a real code pointer |
simonis@6465 | 1352 | return p; |
simonis@6465 | 1353 | } else { |
simonis@6465 | 1354 | lib = LoadedLibraries::find_for_data_address(p); |
simonis@6465 | 1355 | if (lib) { |
simonis@6465 | 1356 | // pointer to data segment, potential function descriptor |
simonis@6465 | 1357 | address code_entry = (address)(((FunctionDescriptor*)p)->entry()); |
simonis@6465 | 1358 | if (LoadedLibraries::find_for_text_address(code_entry)) { |
simonis@6465 | 1359 | // Its a function descriptor |
simonis@6465 | 1360 | return code_entry; |
simonis@6465 | 1361 | } |
simonis@6465 | 1362 | } |
simonis@6465 | 1363 | } |
simonis@6465 | 1364 | return NULL; |
simonis@6465 | 1365 | } |
simonis@6465 | 1366 | |
simonis@6465 | 1367 | bool os::dll_address_to_function_name(address addr, char *buf, |
simonis@6465 | 1368 | int buflen, int *offset) { |
simonis@6465 | 1369 | if (offset) { |
simonis@6465 | 1370 | *offset = -1; |
simonis@6465 | 1371 | } |
simonis@6465 | 1372 | if (buf) { |
simonis@6465 | 1373 | buf[0] = '\0'; |
simonis@6465 | 1374 | } |
simonis@6465 | 1375 | |
simonis@6465 | 1376 | // Resolve function ptr literals first. |
simonis@6465 | 1377 | addr = resolve_function_descriptor_to_code_pointer(addr); |
simonis@6465 | 1378 | if (!addr) { |
simonis@6465 | 1379 | return false; |
simonis@6465 | 1380 | } |
simonis@6465 | 1381 | |
simonis@6465 | 1382 | // Go through Decoder::decode to call getFuncName which reads the name from the traceback table. |
simonis@6465 | 1383 | return Decoder::decode(addr, buf, buflen, offset); |
simonis@6465 | 1384 | } |
simonis@6465 | 1385 | |
simonis@6465 | 1386 | static int getModuleName(codeptr_t pc, // [in] program counter |
simonis@6465 | 1387 | char* p_name, size_t namelen, // [out] optional: function name |
simonis@6465 | 1388 | char* p_errmsg, size_t errmsglen // [out] optional: user provided buffer for error messages |
simonis@6465 | 1389 | ) { |
simonis@6465 | 1390 | |
simonis@6465 | 1391 | // initialize output parameters |
simonis@6465 | 1392 | if (p_name && namelen > 0) { |
simonis@6465 | 1393 | *p_name = '\0'; |
simonis@6465 | 1394 | } |
simonis@6465 | 1395 | if (p_errmsg && errmsglen > 0) { |
simonis@6465 | 1396 | *p_errmsg = '\0'; |
simonis@6465 | 1397 | } |
simonis@6465 | 1398 | |
simonis@6465 | 1399 | const LoadedLibraryModule* const lib = LoadedLibraries::find_for_text_address((address)pc); |
simonis@6465 | 1400 | if (lib) { |
simonis@6465 | 1401 | if (p_name && namelen > 0) { |
simonis@6465 | 1402 | sprintf(p_name, "%.*s", namelen, lib->get_shortname()); |
simonis@6465 | 1403 | } |
simonis@6465 | 1404 | return 0; |
simonis@6465 | 1405 | } |
simonis@6465 | 1406 | |
simonis@6465 | 1407 | if (Verbose) { |
simonis@6465 | 1408 | fprintf(stderr, "pc outside any module"); |
simonis@6465 | 1409 | } |
simonis@6465 | 1410 | |
simonis@6465 | 1411 | return -1; |
simonis@6465 | 1412 | |
simonis@6465 | 1413 | } |
simonis@6465 | 1414 | |
simonis@6465 | 1415 | bool os::dll_address_to_library_name(address addr, char* buf, |
simonis@6465 | 1416 | int buflen, int* offset) { |
simonis@6465 | 1417 | if (offset) { |
simonis@6465 | 1418 | *offset = -1; |
simonis@6465 | 1419 | } |
simonis@6465 | 1420 | if (buf) { |
simonis@6465 | 1421 | buf[0] = '\0'; |
simonis@6465 | 1422 | } |
simonis@6465 | 1423 | |
simonis@6465 | 1424 | // Resolve function ptr literals first. |
simonis@6465 | 1425 | addr = resolve_function_descriptor_to_code_pointer(addr); |
simonis@6465 | 1426 | if (!addr) { |
simonis@6465 | 1427 | return false; |
simonis@6465 | 1428 | } |
simonis@6465 | 1429 | |
simonis@6465 | 1430 | if (::getModuleName((codeptr_t) addr, buf, buflen, 0, 0) == 0) { |
simonis@6465 | 1431 | return true; |
simonis@6465 | 1432 | } |
simonis@6465 | 1433 | return false; |
simonis@6465 | 1434 | } |
simonis@6465 | 1435 | |
simonis@6465 | 1436 | // Loads .dll/.so and in case of error it checks if .dll/.so was built |
simonis@6465 | 1437 | // for the same architecture as Hotspot is running on |
simonis@6465 | 1438 | void *os::dll_load(const char *filename, char *ebuf, int ebuflen) { |
simonis@6465 | 1439 | |
simonis@6465 | 1440 | if (ebuf && ebuflen > 0) { |
simonis@6465 | 1441 | ebuf[0] = '\0'; |
simonis@6465 | 1442 | ebuf[ebuflen - 1] = '\0'; |
simonis@6465 | 1443 | } |
simonis@6465 | 1444 | |
simonis@6465 | 1445 | if (!filename || strlen(filename) == 0) { |
simonis@6465 | 1446 | ::strncpy(ebuf, "dll_load: empty filename specified", ebuflen - 1); |
simonis@6465 | 1447 | return NULL; |
simonis@6465 | 1448 | } |
simonis@6465 | 1449 | |
simonis@6465 | 1450 | // RTLD_LAZY is currently not implemented. The dl is loaded immediately with all its dependants. |
simonis@6465 | 1451 | void * result= ::dlopen(filename, RTLD_LAZY); |
simonis@6465 | 1452 | if (result != NULL) { |
simonis@6465 | 1453 | // Reload dll cache. Don't do this in signal handling. |
simonis@6465 | 1454 | LoadedLibraries::reload(); |
simonis@6465 | 1455 | return result; |
simonis@6465 | 1456 | } else { |
simonis@6465 | 1457 | // error analysis when dlopen fails |
simonis@6465 | 1458 | const char* const error_report = ::dlerror(); |
simonis@6465 | 1459 | if (error_report && ebuf && ebuflen > 0) { |
simonis@6465 | 1460 | snprintf(ebuf, ebuflen - 1, "%s, LIBPATH=%s, LD_LIBRARY_PATH=%s : %s", |
simonis@6465 | 1461 | filename, ::getenv("LIBPATH"), ::getenv("LD_LIBRARY_PATH"), error_report); |
simonis@6465 | 1462 | } |
simonis@6465 | 1463 | } |
simonis@6465 | 1464 | return NULL; |
simonis@6465 | 1465 | } |
simonis@6465 | 1466 | |
simonis@6465 | 1467 | // Glibc-2.0 libdl is not MT safe. If you are building with any glibc, |
simonis@6465 | 1468 | // chances are you might want to run the generated bits against glibc-2.0 |
simonis@6465 | 1469 | // libdl.so, so always use locking for any version of glibc. |
simonis@6465 | 1470 | void* os::dll_lookup(void* handle, const char* name) { |
simonis@6465 | 1471 | pthread_mutex_lock(&dl_mutex); |
simonis@6465 | 1472 | void* res = dlsym(handle, name); |
simonis@6465 | 1473 | pthread_mutex_unlock(&dl_mutex); |
simonis@6465 | 1474 | return res; |
simonis@6465 | 1475 | } |
simonis@6465 | 1476 | |
simonis@6514 | 1477 | void* os::get_default_process_handle() { |
simonis@6514 | 1478 | return (void*)::dlopen(NULL, RTLD_LAZY); |
simonis@6514 | 1479 | } |
simonis@6514 | 1480 | |
simonis@6465 | 1481 | void os::print_dll_info(outputStream *st) { |
simonis@6465 | 1482 | st->print_cr("Dynamic libraries:"); |
simonis@6465 | 1483 | LoadedLibraries::print(st); |
simonis@6465 | 1484 | } |
simonis@6465 | 1485 | |
simonis@6465 | 1486 | void os::print_os_info(outputStream* st) { |
simonis@6465 | 1487 | st->print("OS:"); |
simonis@6465 | 1488 | |
simonis@6465 | 1489 | st->print("uname:"); |
simonis@6465 | 1490 | struct utsname name; |
simonis@6465 | 1491 | uname(&name); |
simonis@6465 | 1492 | st->print(name.sysname); st->print(" "); |
simonis@6465 | 1493 | st->print(name.nodename); st->print(" "); |
simonis@6465 | 1494 | st->print(name.release); st->print(" "); |
simonis@6465 | 1495 | st->print(name.version); st->print(" "); |
simonis@6465 | 1496 | st->print(name.machine); |
simonis@6465 | 1497 | st->cr(); |
simonis@6465 | 1498 | |
simonis@6465 | 1499 | // rlimit |
simonis@6465 | 1500 | st->print("rlimit:"); |
simonis@6465 | 1501 | struct rlimit rlim; |
simonis@6465 | 1502 | |
simonis@6465 | 1503 | st->print(" STACK "); |
simonis@6465 | 1504 | getrlimit(RLIMIT_STACK, &rlim); |
simonis@6465 | 1505 | if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); |
simonis@6465 | 1506 | else st->print("%uk", rlim.rlim_cur >> 10); |
simonis@6465 | 1507 | |
simonis@6465 | 1508 | st->print(", CORE "); |
simonis@6465 | 1509 | getrlimit(RLIMIT_CORE, &rlim); |
simonis@6465 | 1510 | if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); |
simonis@6465 | 1511 | else st->print("%uk", rlim.rlim_cur >> 10); |
simonis@6465 | 1512 | |
simonis@6465 | 1513 | st->print(", NPROC "); |
simonis@6465 | 1514 | st->print("%d", sysconf(_SC_CHILD_MAX)); |
simonis@6465 | 1515 | |
simonis@6465 | 1516 | st->print(", NOFILE "); |
simonis@6465 | 1517 | getrlimit(RLIMIT_NOFILE, &rlim); |
simonis@6465 | 1518 | if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); |
simonis@6465 | 1519 | else st->print("%d", rlim.rlim_cur); |
simonis@6465 | 1520 | |
simonis@6465 | 1521 | st->print(", AS "); |
simonis@6465 | 1522 | getrlimit(RLIMIT_AS, &rlim); |
simonis@6465 | 1523 | if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); |
simonis@6465 | 1524 | else st->print("%uk", rlim.rlim_cur >> 10); |
simonis@6465 | 1525 | |
simonis@6465 | 1526 | // Print limits on DATA, because it limits the C-heap. |
simonis@6465 | 1527 | st->print(", DATA "); |
simonis@6465 | 1528 | getrlimit(RLIMIT_DATA, &rlim); |
simonis@6465 | 1529 | if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); |
simonis@6465 | 1530 | else st->print("%uk", rlim.rlim_cur >> 10); |
simonis@6465 | 1531 | st->cr(); |
simonis@6465 | 1532 | |
simonis@6465 | 1533 | // load average |
simonis@6465 | 1534 | st->print("load average:"); |
simonis@6465 | 1535 | double loadavg[3] = {-1.L, -1.L, -1.L}; |
simonis@6465 | 1536 | os::loadavg(loadavg, 3); |
simonis@6465 | 1537 | st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]); |
simonis@6465 | 1538 | st->cr(); |
simonis@6465 | 1539 | } |
simonis@6465 | 1540 | |
simonis@6465 | 1541 | void os::print_memory_info(outputStream* st) { |
simonis@6465 | 1542 | |
simonis@6465 | 1543 | st->print_cr("Memory:"); |
simonis@6465 | 1544 | |
simonis@6465 | 1545 | st->print_cr(" default page size: %s", describe_pagesize(os::vm_page_size())); |
simonis@6465 | 1546 | st->print_cr(" default stack page size: %s", describe_pagesize(os::vm_page_size())); |
simonis@6465 | 1547 | st->print_cr(" default shm page size: %s", describe_pagesize(os::Aix::shm_default_page_size())); |
simonis@6465 | 1548 | st->print_cr(" can use 64K pages dynamically: %s", (os::Aix::can_use_64K_pages() ? "yes" :"no")); |
simonis@6465 | 1549 | st->print_cr(" can use 16M pages dynamically: %s", (os::Aix::can_use_16M_pages() ? "yes" :"no")); |
simonis@6465 | 1550 | if (g_multipage_error != 0) { |
simonis@6465 | 1551 | st->print_cr(" multipage error: %d", g_multipage_error); |
simonis@6465 | 1552 | } |
simonis@6465 | 1553 | |
simonis@6465 | 1554 | // print out LDR_CNTRL because it affects the default page sizes |
simonis@6465 | 1555 | const char* const ldr_cntrl = ::getenv("LDR_CNTRL"); |
simonis@6465 | 1556 | st->print_cr(" LDR_CNTRL=%s.", ldr_cntrl ? ldr_cntrl : "<unset>"); |
simonis@6465 | 1557 | |
simonis@6465 | 1558 | const char* const extshm = ::getenv("EXTSHM"); |
simonis@6465 | 1559 | st->print_cr(" EXTSHM=%s.", extshm ? extshm : "<unset>"); |
simonis@6465 | 1560 | |
simonis@6465 | 1561 | // Call os::Aix::get_meminfo() to retrieve memory statistics. |
simonis@6465 | 1562 | os::Aix::meminfo_t mi; |
simonis@6465 | 1563 | if (os::Aix::get_meminfo(&mi)) { |
simonis@6465 | 1564 | char buffer[256]; |
simonis@6465 | 1565 | if (os::Aix::on_aix()) { |
simonis@6465 | 1566 | jio_snprintf(buffer, sizeof(buffer), |
simonis@6465 | 1567 | " physical total : %llu\n" |
simonis@6465 | 1568 | " physical free : %llu\n" |
simonis@6465 | 1569 | " swap total : %llu\n" |
simonis@6465 | 1570 | " swap free : %llu\n", |
simonis@6465 | 1571 | mi.real_total, |
simonis@6465 | 1572 | mi.real_free, |
simonis@6465 | 1573 | mi.pgsp_total, |
simonis@6465 | 1574 | mi.pgsp_free); |
simonis@6465 | 1575 | } else { |
simonis@6465 | 1576 | Unimplemented(); |
simonis@6465 | 1577 | } |
simonis@6465 | 1578 | st->print_raw(buffer); |
simonis@6465 | 1579 | } else { |
simonis@6465 | 1580 | st->print_cr(" (no more information available)"); |
simonis@6465 | 1581 | } |
simonis@6465 | 1582 | } |
simonis@6465 | 1583 | |
simonis@6465 | 1584 | void os::pd_print_cpu_info(outputStream* st) { |
simonis@6465 | 1585 | // cpu |
simonis@6465 | 1586 | st->print("CPU:"); |
simonis@6465 | 1587 | st->print("total %d", os::processor_count()); |
simonis@6465 | 1588 | // It's not safe to query number of active processors after crash |
simonis@6465 | 1589 | // st->print("(active %d)", os::active_processor_count()); |
simonis@6465 | 1590 | st->print(" %s", VM_Version::cpu_features()); |
simonis@6465 | 1591 | st->cr(); |
simonis@6465 | 1592 | } |
simonis@6465 | 1593 | |
simonis@6465 | 1594 | void os::print_siginfo(outputStream* st, void* siginfo) { |
simonis@6465 | 1595 | // Use common posix version. |
simonis@6465 | 1596 | os::Posix::print_siginfo_brief(st, (const siginfo_t*) siginfo); |
simonis@6465 | 1597 | st->cr(); |
simonis@6465 | 1598 | } |
simonis@6465 | 1599 | |
simonis@6465 | 1600 | |
simonis@6465 | 1601 | static void print_signal_handler(outputStream* st, int sig, |
simonis@6465 | 1602 | char* buf, size_t buflen); |
simonis@6465 | 1603 | |
simonis@6465 | 1604 | void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { |
simonis@6465 | 1605 | st->print_cr("Signal Handlers:"); |
simonis@6465 | 1606 | print_signal_handler(st, SIGSEGV, buf, buflen); |
simonis@6465 | 1607 | print_signal_handler(st, SIGBUS , buf, buflen); |
simonis@6465 | 1608 | print_signal_handler(st, SIGFPE , buf, buflen); |
simonis@6465 | 1609 | print_signal_handler(st, SIGPIPE, buf, buflen); |
simonis@6465 | 1610 | print_signal_handler(st, SIGXFSZ, buf, buflen); |
simonis@6465 | 1611 | print_signal_handler(st, SIGILL , buf, buflen); |
simonis@6465 | 1612 | print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); |
simonis@6465 | 1613 | print_signal_handler(st, SR_signum, buf, buflen); |
simonis@6465 | 1614 | print_signal_handler(st, SHUTDOWN1_SIGNAL, buf, buflen); |
simonis@6465 | 1615 | print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); |
simonis@6465 | 1616 | print_signal_handler(st, SHUTDOWN3_SIGNAL , buf, buflen); |
simonis@6465 | 1617 | print_signal_handler(st, BREAK_SIGNAL, buf, buflen); |
simonis@6465 | 1618 | print_signal_handler(st, SIGTRAP, buf, buflen); |
simonis@6465 | 1619 | print_signal_handler(st, SIGDANGER, buf, buflen); |
simonis@6465 | 1620 | } |
simonis@6465 | 1621 | |
simonis@6465 | 1622 | static char saved_jvm_path[MAXPATHLEN] = {0}; |
simonis@6465 | 1623 | |
simonis@6465 | 1624 | // Find the full path to the current module, libjvm.so or libjvm_g.so |
simonis@6465 | 1625 | void os::jvm_path(char *buf, jint buflen) { |
simonis@6465 | 1626 | // Error checking. |
simonis@6465 | 1627 | if (buflen < MAXPATHLEN) { |
simonis@6465 | 1628 | assert(false, "must use a large-enough buffer"); |
simonis@6465 | 1629 | buf[0] = '\0'; |
simonis@6465 | 1630 | return; |
simonis@6465 | 1631 | } |
simonis@6465 | 1632 | // Lazy resolve the path to current module. |
simonis@6465 | 1633 | if (saved_jvm_path[0] != 0) { |
simonis@6465 | 1634 | strcpy(buf, saved_jvm_path); |
simonis@6465 | 1635 | return; |
simonis@6465 | 1636 | } |
simonis@6465 | 1637 | |
simonis@6465 | 1638 | Dl_info dlinfo; |
simonis@6465 | 1639 | int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); |
simonis@6465 | 1640 | assert(ret != 0, "cannot locate libjvm"); |
simonis@6465 | 1641 | char* rp = realpath((char *)dlinfo.dli_fname, buf); |
simonis@6465 | 1642 | assert(rp != NULL, "error in realpath(): maybe the 'path' argument is too long?"); |
simonis@6465 | 1643 | |
simonis@6465 | 1644 | strcpy(saved_jvm_path, buf); |
simonis@6465 | 1645 | } |
simonis@6465 | 1646 | |
simonis@6465 | 1647 | void os::print_jni_name_prefix_on(outputStream* st, int args_size) { |
simonis@6465 | 1648 | // no prefix required, not even "_" |
simonis@6465 | 1649 | } |
simonis@6465 | 1650 | |
simonis@6465 | 1651 | void os::print_jni_name_suffix_on(outputStream* st, int args_size) { |
simonis@6465 | 1652 | // no suffix required |
simonis@6465 | 1653 | } |
simonis@6465 | 1654 | |
simonis@6465 | 1655 | //////////////////////////////////////////////////////////////////////////////// |
simonis@6465 | 1656 | // sun.misc.Signal support |
simonis@6465 | 1657 | |
simonis@6465 | 1658 | static volatile jint sigint_count = 0; |
simonis@6465 | 1659 | |
simonis@6465 | 1660 | static void |
simonis@6465 | 1661 | UserHandler(int sig, void *siginfo, void *context) { |
simonis@6465 | 1662 | // 4511530 - sem_post is serialized and handled by the manager thread. When |
simonis@6465 | 1663 | // the program is interrupted by Ctrl-C, SIGINT is sent to every thread. We |
simonis@6465 | 1664 | // don't want to flood the manager thread with sem_post requests. |
simonis@6465 | 1665 | if (sig == SIGINT && Atomic::add(1, &sigint_count) > 1) |
simonis@6465 | 1666 | return; |
simonis@6465 | 1667 | |
simonis@6465 | 1668 | // Ctrl-C is pressed during error reporting, likely because the error |
simonis@6465 | 1669 | // handler fails to abort. Let VM die immediately. |
simonis@6465 | 1670 | if (sig == SIGINT && is_error_reported()) { |
simonis@6465 | 1671 | os::die(); |
simonis@6465 | 1672 | } |
simonis@6465 | 1673 | |
simonis@6465 | 1674 | os::signal_notify(sig); |
simonis@6465 | 1675 | } |
simonis@6465 | 1676 | |
simonis@6465 | 1677 | void* os::user_handler() { |
simonis@6465 | 1678 | return CAST_FROM_FN_PTR(void*, UserHandler); |
simonis@6465 | 1679 | } |
simonis@6465 | 1680 | |
simonis@6465 | 1681 | extern "C" { |
simonis@6465 | 1682 | typedef void (*sa_handler_t)(int); |
simonis@6465 | 1683 | typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); |
simonis@6465 | 1684 | } |
simonis@6465 | 1685 | |
simonis@6465 | 1686 | void* os::signal(int signal_number, void* handler) { |
simonis@6465 | 1687 | struct sigaction sigAct, oldSigAct; |
simonis@6465 | 1688 | |
simonis@6465 | 1689 | sigfillset(&(sigAct.sa_mask)); |
simonis@6465 | 1690 | |
simonis@6465 | 1691 | // Do not block out synchronous signals in the signal handler. |
simonis@6465 | 1692 | // Blocking synchronous signals only makes sense if you can really |
simonis@6465 | 1693 | // be sure that those signals won't happen during signal handling, |
simonis@6465 | 1694 | // when the blocking applies. Normal signal handlers are lean and |
simonis@6465 | 1695 | // do not cause signals. But our signal handlers tend to be "risky" |
simonis@6465 | 1696 | // - secondary SIGSEGV, SIGILL, SIGBUS' may and do happen. |
simonis@6465 | 1697 | // On AIX, PASE there was a case where a SIGSEGV happened, followed |
simonis@6465 | 1698 | // by a SIGILL, which was blocked due to the signal mask. The process |
simonis@6465 | 1699 | // just hung forever. Better to crash from a secondary signal than to hang. |
simonis@6465 | 1700 | sigdelset(&(sigAct.sa_mask), SIGSEGV); |
simonis@6465 | 1701 | sigdelset(&(sigAct.sa_mask), SIGBUS); |
simonis@6465 | 1702 | sigdelset(&(sigAct.sa_mask), SIGILL); |
simonis@6465 | 1703 | sigdelset(&(sigAct.sa_mask), SIGFPE); |
simonis@6465 | 1704 | sigdelset(&(sigAct.sa_mask), SIGTRAP); |
simonis@6465 | 1705 | |
simonis@6465 | 1706 | sigAct.sa_flags = SA_RESTART|SA_SIGINFO; |
simonis@6465 | 1707 | |
simonis@6465 | 1708 | sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); |
simonis@6465 | 1709 | |
simonis@6465 | 1710 | if (sigaction(signal_number, &sigAct, &oldSigAct)) { |
simonis@6465 | 1711 | // -1 means registration failed |
simonis@6465 | 1712 | return (void *)-1; |
simonis@6465 | 1713 | } |
simonis@6465 | 1714 | |
simonis@6465 | 1715 | return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); |
simonis@6465 | 1716 | } |
simonis@6465 | 1717 | |
simonis@6465 | 1718 | void os::signal_raise(int signal_number) { |
simonis@6465 | 1719 | ::raise(signal_number); |
simonis@6465 | 1720 | } |
simonis@6465 | 1721 | |
simonis@6465 | 1722 | // |
simonis@6465 | 1723 | // The following code is moved from os.cpp for making this |
simonis@6465 | 1724 | // code platform specific, which it is by its very nature. |
simonis@6465 | 1725 | // |
simonis@6465 | 1726 | |
simonis@6465 | 1727 | // Will be modified when max signal is changed to be dynamic |
simonis@6465 | 1728 | int os::sigexitnum_pd() { |
simonis@6465 | 1729 | return NSIG; |
simonis@6465 | 1730 | } |
simonis@6465 | 1731 | |
simonis@6465 | 1732 | // a counter for each possible signal value |
simonis@6465 | 1733 | static volatile jint pending_signals[NSIG+1] = { 0 }; |
simonis@6465 | 1734 | |
simonis@6465 | 1735 | // Linux(POSIX) specific hand shaking semaphore. |
simonis@6465 | 1736 | static sem_t sig_sem; |
simonis@6465 | 1737 | |
simonis@6465 | 1738 | void os::signal_init_pd() { |
simonis@6465 | 1739 | // Initialize signal structures |
simonis@6465 | 1740 | ::memset((void*)pending_signals, 0, sizeof(pending_signals)); |
simonis@6465 | 1741 | |
simonis@6465 | 1742 | // Initialize signal semaphore |
simonis@6465 | 1743 | int rc = ::sem_init(&sig_sem, 0, 0); |
simonis@6465 | 1744 | guarantee(rc != -1, "sem_init failed"); |
simonis@6465 | 1745 | } |
simonis@6465 | 1746 | |
simonis@6465 | 1747 | void os::signal_notify(int sig) { |
simonis@6465 | 1748 | Atomic::inc(&pending_signals[sig]); |
simonis@6465 | 1749 | ::sem_post(&sig_sem); |
simonis@6465 | 1750 | } |
simonis@6465 | 1751 | |
simonis@6465 | 1752 | static int check_pending_signals(bool wait) { |
simonis@6465 | 1753 | Atomic::store(0, &sigint_count); |
simonis@6465 | 1754 | for (;;) { |
simonis@6465 | 1755 | for (int i = 0; i < NSIG + 1; i++) { |
simonis@6465 | 1756 | jint n = pending_signals[i]; |
simonis@6465 | 1757 | if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { |
simonis@6465 | 1758 | return i; |
simonis@6465 | 1759 | } |
simonis@6465 | 1760 | } |
simonis@6465 | 1761 | if (!wait) { |
simonis@6465 | 1762 | return -1; |
simonis@6465 | 1763 | } |
simonis@6465 | 1764 | JavaThread *thread = JavaThread::current(); |
simonis@6465 | 1765 | ThreadBlockInVM tbivm(thread); |
simonis@6465 | 1766 | |
simonis@6465 | 1767 | bool threadIsSuspended; |
simonis@6465 | 1768 | do { |
simonis@6465 | 1769 | thread->set_suspend_equivalent(); |
simonis@6465 | 1770 | // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() |
simonis@6465 | 1771 | |
simonis@6465 | 1772 | ::sem_wait(&sig_sem); |
simonis@6465 | 1773 | |
simonis@6465 | 1774 | // were we externally suspended while we were waiting? |
simonis@6465 | 1775 | threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); |
simonis@6465 | 1776 | if (threadIsSuspended) { |
simonis@6465 | 1777 | // |
simonis@6465 | 1778 | // The semaphore has been incremented, but while we were waiting |
simonis@6465 | 1779 | // another thread suspended us. We don't want to continue running |
simonis@6465 | 1780 | // while suspended because that would surprise the thread that |
simonis@6465 | 1781 | // suspended us. |
simonis@6465 | 1782 | // |
simonis@6465 | 1783 | ::sem_post(&sig_sem); |
simonis@6465 | 1784 | |
simonis@6465 | 1785 | thread->java_suspend_self(); |
simonis@6465 | 1786 | } |
simonis@6465 | 1787 | } while (threadIsSuspended); |
simonis@6465 | 1788 | } |
simonis@6465 | 1789 | } |
simonis@6465 | 1790 | |
simonis@6465 | 1791 | int os::signal_lookup() { |
simonis@6465 | 1792 | return check_pending_signals(false); |
simonis@6465 | 1793 | } |
simonis@6465 | 1794 | |
simonis@6465 | 1795 | int os::signal_wait() { |
simonis@6465 | 1796 | return check_pending_signals(true); |
simonis@6465 | 1797 | } |
simonis@6465 | 1798 | |
simonis@6465 | 1799 | //////////////////////////////////////////////////////////////////////////////// |
simonis@6465 | 1800 | // Virtual Memory |
simonis@6465 | 1801 | |
simonis@6465 | 1802 | // AddrRange describes an immutable address range |
simonis@6465 | 1803 | // |
simonis@6465 | 1804 | // This is a helper class for the 'shared memory bookkeeping' below. |
simonis@6465 | 1805 | class AddrRange { |
simonis@6465 | 1806 | friend class ShmBkBlock; |
simonis@6465 | 1807 | |
simonis@6465 | 1808 | char* _start; |
simonis@6465 | 1809 | size_t _size; |
simonis@6465 | 1810 | |
simonis@6465 | 1811 | public: |
simonis@6465 | 1812 | |
simonis@6465 | 1813 | AddrRange(char* start, size_t size) |
simonis@6465 | 1814 | : _start(start), _size(size) |
simonis@6465 | 1815 | {} |
simonis@6465 | 1816 | |
simonis@6465 | 1817 | AddrRange(const AddrRange& r) |
simonis@6465 | 1818 | : _start(r.start()), _size(r.size()) |
simonis@6465 | 1819 | {} |
simonis@6465 | 1820 | |
simonis@6465 | 1821 | char* start() const { return _start; } |
simonis@6465 | 1822 | size_t size() const { return _size; } |
simonis@6465 | 1823 | char* end() const { return _start + _size; } |
simonis@6465 | 1824 | bool is_empty() const { return _size == 0 ? true : false; } |
simonis@6465 | 1825 | |
simonis@6465 | 1826 | static AddrRange empty_range() { return AddrRange(NULL, 0); } |
simonis@6465 | 1827 | |
simonis@6465 | 1828 | bool contains(const char* p) const { |
simonis@6465 | 1829 | return start() <= p && end() > p; |
simonis@6465 | 1830 | } |
simonis@6465 | 1831 | |
simonis@6465 | 1832 | bool contains(const AddrRange& range) const { |
simonis@6465 | 1833 | return start() <= range.start() && end() >= range.end(); |
simonis@6465 | 1834 | } |
simonis@6465 | 1835 | |
simonis@6465 | 1836 | bool intersects(const AddrRange& range) const { |
simonis@6465 | 1837 | return (range.start() <= start() && range.end() > start()) || |
simonis@6465 | 1838 | (range.start() < end() && range.end() >= end()) || |
simonis@6465 | 1839 | contains(range); |
simonis@6465 | 1840 | } |
simonis@6465 | 1841 | |
simonis@6465 | 1842 | bool is_same_range(const AddrRange& range) const { |
simonis@6465 | 1843 | return start() == range.start() && size() == range.size(); |
simonis@6465 | 1844 | } |
simonis@6465 | 1845 | |
simonis@6465 | 1846 | // return the closest inside range consisting of whole pages |
simonis@6465 | 1847 | AddrRange find_closest_aligned_range(size_t pagesize) const { |
simonis@6465 | 1848 | if (pagesize == 0 || is_empty()) { |
simonis@6465 | 1849 | return empty_range(); |
simonis@6465 | 1850 | } |
simonis@6465 | 1851 | char* const from = (char*)align_size_up((intptr_t)_start, pagesize); |
simonis@6465 | 1852 | char* const to = (char*)align_size_down((intptr_t)end(), pagesize); |
simonis@6465 | 1853 | if (from > to) { |
simonis@6465 | 1854 | return empty_range(); |
simonis@6465 | 1855 | } |
simonis@6465 | 1856 | return AddrRange(from, to - from); |
simonis@6465 | 1857 | } |
simonis@6465 | 1858 | }; |
simonis@6465 | 1859 | |
simonis@6465 | 1860 | //////////////////////////////////////////////////////////////////////////// |
simonis@6465 | 1861 | // shared memory bookkeeping |
simonis@6465 | 1862 | // |
simonis@6465 | 1863 | // the os::reserve_memory() API and friends hand out different kind of memory, depending |
simonis@6465 | 1864 | // on need and circumstances. Memory may be allocated with mmap() or with shmget/shmat. |
simonis@6465 | 1865 | // |
simonis@6465 | 1866 | // But these memory types have to be treated differently. For example, to uncommit |
simonis@6465 | 1867 | // mmap-based memory, msync(MS_INVALIDATE) is needed, to uncommit shmat-based memory, |
simonis@6465 | 1868 | // disclaim64() is needed. |
simonis@6465 | 1869 | // |
simonis@6465 | 1870 | // Therefore we need to keep track of the allocated memory segments and their |
simonis@6465 | 1871 | // properties. |
simonis@6465 | 1872 | |
simonis@6465 | 1873 | // ShmBkBlock: base class for all blocks in the shared memory bookkeeping |
simonis@6465 | 1874 | class ShmBkBlock { |
simonis@6465 | 1875 | |
simonis@6465 | 1876 | ShmBkBlock* _next; |
simonis@6465 | 1877 | |
simonis@6465 | 1878 | protected: |
simonis@6465 | 1879 | |
simonis@6465 | 1880 | AddrRange _range; |
simonis@6465 | 1881 | const size_t _pagesize; |
simonis@6465 | 1882 | const bool _pinned; |
simonis@6465 | 1883 | |
simonis@6465 | 1884 | public: |
simonis@6465 | 1885 | |
simonis@6465 | 1886 | ShmBkBlock(AddrRange range, size_t pagesize, bool pinned) |
simonis@6465 | 1887 | : _range(range), _pagesize(pagesize), _pinned(pinned) , _next(NULL) { |
simonis@6465 | 1888 | |
simonis@6465 | 1889 | assert(_pagesize == SIZE_4K || _pagesize == SIZE_64K || _pagesize == SIZE_16M, "invalid page size"); |
simonis@6465 | 1890 | assert(!_range.is_empty(), "invalid range"); |
simonis@6465 | 1891 | } |
simonis@6465 | 1892 | |
simonis@6465 | 1893 | virtual void print(outputStream* st) const { |
simonis@6465 | 1894 | st->print("0x%p ... 0x%p (%llu) - %d %s pages - %s", |
simonis@6465 | 1895 | _range.start(), _range.end(), _range.size(), |
simonis@6465 | 1896 | _range.size() / _pagesize, describe_pagesize(_pagesize), |
simonis@6465 | 1897 | _pinned ? "pinned" : ""); |
simonis@6465 | 1898 | } |
simonis@6465 | 1899 | |
simonis@6465 | 1900 | enum Type { MMAP, SHMAT }; |
simonis@6465 | 1901 | virtual Type getType() = 0; |
simonis@6465 | 1902 | |
simonis@6465 | 1903 | char* base() const { return _range.start(); } |
simonis@6465 | 1904 | size_t size() const { return _range.size(); } |
simonis@6465 | 1905 | |
simonis@6465 | 1906 | void setAddrRange(AddrRange range) { |
simonis@6465 | 1907 | _range = range; |
simonis@6465 | 1908 | } |
simonis@6465 | 1909 | |
simonis@6465 | 1910 | bool containsAddress(const char* p) const { |
simonis@6465 | 1911 | return _range.contains(p); |
simonis@6465 | 1912 | } |
simonis@6465 | 1913 | |
simonis@6465 | 1914 | bool containsRange(const char* p, size_t size) const { |
simonis@6465 | 1915 | return _range.contains(AddrRange((char*)p, size)); |
simonis@6465 | 1916 | } |
simonis@6465 | 1917 | |
simonis@6465 | 1918 | bool isSameRange(const char* p, size_t size) const { |
simonis@6465 | 1919 | return _range.is_same_range(AddrRange((char*)p, size)); |
simonis@6465 | 1920 | } |
simonis@6465 | 1921 | |
simonis@6465 | 1922 | virtual bool disclaim(char* p, size_t size) = 0; |
simonis@6465 | 1923 | virtual bool release() = 0; |
simonis@6465 | 1924 | |
simonis@6465 | 1925 | // blocks live in a list. |
simonis@6465 | 1926 | ShmBkBlock* next() const { return _next; } |
simonis@6465 | 1927 | void set_next(ShmBkBlock* blk) { _next = blk; } |
simonis@6465 | 1928 | |
simonis@6465 | 1929 | }; // end: ShmBkBlock |
simonis@6465 | 1930 | |
simonis@6465 | 1931 | |
simonis@6465 | 1932 | // ShmBkMappedBlock: describes an block allocated with mmap() |
simonis@6465 | 1933 | class ShmBkMappedBlock : public ShmBkBlock { |
simonis@6465 | 1934 | public: |
simonis@6465 | 1935 | |
simonis@6465 | 1936 | ShmBkMappedBlock(AddrRange range) |
simonis@6465 | 1937 | : ShmBkBlock(range, SIZE_4K, false) {} // mmap: always 4K, never pinned |
simonis@6465 | 1938 | |
simonis@6465 | 1939 | void print(outputStream* st) const { |
simonis@6465 | 1940 | ShmBkBlock::print(st); |
simonis@6465 | 1941 | st->print_cr(" - mmap'ed"); |
simonis@6465 | 1942 | } |
simonis@6465 | 1943 | |
simonis@6465 | 1944 | Type getType() { |
simonis@6465 | 1945 | return MMAP; |
simonis@6465 | 1946 | } |
simonis@6465 | 1947 | |
simonis@6465 | 1948 | bool disclaim(char* p, size_t size) { |
simonis@6465 | 1949 | |
simonis@6465 | 1950 | AddrRange r(p, size); |
simonis@6465 | 1951 | |
simonis@6465 | 1952 | guarantee(_range.contains(r), "invalid disclaim"); |
simonis@6465 | 1953 | |
simonis@6465 | 1954 | // only disclaim whole ranges. |
simonis@6465 | 1955 | const AddrRange r2 = r.find_closest_aligned_range(_pagesize); |
simonis@6465 | 1956 | if (r2.is_empty()) { |
simonis@6465 | 1957 | return true; |
simonis@6465 | 1958 | } |
simonis@6465 | 1959 | |
simonis@6465 | 1960 | const int rc = ::msync(r2.start(), r2.size(), MS_INVALIDATE); |
simonis@6465 | 1961 | |
simonis@6465 | 1962 | if (rc != 0) { |
simonis@6465 | 1963 | warning("msync(0x%p, %llu, MS_INVALIDATE) failed (%d)\n", r2.start(), r2.size(), errno); |
simonis@6465 | 1964 | } |
simonis@6465 | 1965 | |
simonis@6465 | 1966 | return rc == 0 ? true : false; |
simonis@6465 | 1967 | } |
simonis@6465 | 1968 | |
simonis@6465 | 1969 | bool release() { |
simonis@6465 | 1970 | // mmap'ed blocks are released using munmap |
simonis@6465 | 1971 | if (::munmap(_range.start(), _range.size()) != 0) { |
simonis@6465 | 1972 | warning("munmap(0x%p, %llu) failed (%d)\n", _range.start(), _range.size(), errno); |
simonis@6465 | 1973 | return false; |
simonis@6465 | 1974 | } |
simonis@6465 | 1975 | return true; |
simonis@6465 | 1976 | } |
simonis@6465 | 1977 | }; // end: ShmBkMappedBlock |
simonis@6465 | 1978 | |
simonis@6465 | 1979 | // ShmBkShmatedBlock: describes an block allocated with shmget/shmat() |
simonis@6465 | 1980 | class ShmBkShmatedBlock : public ShmBkBlock { |
simonis@6465 | 1981 | public: |
simonis@6465 | 1982 | |
simonis@6465 | 1983 | ShmBkShmatedBlock(AddrRange range, size_t pagesize, bool pinned) |
simonis@6465 | 1984 | : ShmBkBlock(range, pagesize, pinned) {} |
simonis@6465 | 1985 | |
simonis@6465 | 1986 | void print(outputStream* st) const { |
simonis@6465 | 1987 | ShmBkBlock::print(st); |
simonis@6465 | 1988 | st->print_cr(" - shmat'ed"); |
simonis@6465 | 1989 | } |
simonis@6465 | 1990 | |
simonis@6465 | 1991 | Type getType() { |
simonis@6465 | 1992 | return SHMAT; |
simonis@6465 | 1993 | } |
simonis@6465 | 1994 | |
simonis@6465 | 1995 | bool disclaim(char* p, size_t size) { |
simonis@6465 | 1996 | |
simonis@6465 | 1997 | AddrRange r(p, size); |
simonis@6465 | 1998 | |
simonis@6465 | 1999 | if (_pinned) { |
simonis@6465 | 2000 | return true; |
simonis@6465 | 2001 | } |
simonis@6465 | 2002 | |
simonis@6465 | 2003 | // shmat'ed blocks are disclaimed using disclaim64 |
simonis@6465 | 2004 | guarantee(_range.contains(r), "invalid disclaim"); |
simonis@6465 | 2005 | |
simonis@6465 | 2006 | // only disclaim whole ranges. |
simonis@6465 | 2007 | const AddrRange r2 = r.find_closest_aligned_range(_pagesize); |
simonis@6465 | 2008 | if (r2.is_empty()) { |
simonis@6465 | 2009 | return true; |
simonis@6465 | 2010 | } |
simonis@6465 | 2011 | |
simonis@6465 | 2012 | const bool rc = my_disclaim64(r2.start(), r2.size()); |
simonis@6465 | 2013 | |
simonis@6465 | 2014 | if (Verbose && !rc) { |
simonis@6465 | 2015 | warning("failed to disclaim shm %p-%p\n", r2.start(), r2.end()); |
simonis@6465 | 2016 | } |
simonis@6465 | 2017 | |
simonis@6465 | 2018 | return rc; |
simonis@6465 | 2019 | } |
simonis@6465 | 2020 | |
simonis@6465 | 2021 | bool release() { |
simonis@6465 | 2022 | bool rc = false; |
simonis@6465 | 2023 | if (::shmdt(_range.start()) != 0) { |
simonis@6465 | 2024 | warning("shmdt(0x%p) failed (%d)\n", _range.start(), errno); |
simonis@6465 | 2025 | } else { |
simonis@6465 | 2026 | rc = true; |
simonis@6465 | 2027 | } |
simonis@6465 | 2028 | return rc; |
simonis@6465 | 2029 | } |
simonis@6465 | 2030 | |
simonis@6465 | 2031 | }; // end: ShmBkShmatedBlock |
simonis@6465 | 2032 | |
simonis@6465 | 2033 | static ShmBkBlock* g_shmbk_list = NULL; |
simonis@6465 | 2034 | static volatile jint g_shmbk_table_lock = 0; |
simonis@6465 | 2035 | |
simonis@6465 | 2036 | // keep some usage statistics |
simonis@6465 | 2037 | static struct { |
simonis@6465 | 2038 | int nodes; // number of nodes in list |
simonis@6465 | 2039 | size_t bytes; // reserved - not committed - bytes. |
simonis@6465 | 2040 | int reserves; // how often reserve was called |
simonis@6465 | 2041 | int lookups; // how often a lookup was made |
simonis@6465 | 2042 | } g_shmbk_stats = { 0, 0, 0, 0 }; |
simonis@6465 | 2043 | |
simonis@6465 | 2044 | // add information about a shared memory segment to the bookkeeping |
simonis@6465 | 2045 | static void shmbk_register(ShmBkBlock* p_block) { |
simonis@6465 | 2046 | guarantee(p_block, "logic error"); |
simonis@6465 | 2047 | p_block->set_next(g_shmbk_list); |
simonis@6465 | 2048 | g_shmbk_list = p_block; |
simonis@6465 | 2049 | g_shmbk_stats.reserves ++; |
simonis@6465 | 2050 | g_shmbk_stats.bytes += p_block->size(); |
simonis@6465 | 2051 | g_shmbk_stats.nodes ++; |
simonis@6465 | 2052 | } |
simonis@6465 | 2053 | |
simonis@6465 | 2054 | // remove information about a shared memory segment by its starting address |
simonis@6465 | 2055 | static void shmbk_unregister(ShmBkBlock* p_block) { |
simonis@6465 | 2056 | ShmBkBlock* p = g_shmbk_list; |
simonis@6465 | 2057 | ShmBkBlock* prev = NULL; |
simonis@6465 | 2058 | while (p) { |
simonis@6465 | 2059 | if (p == p_block) { |
simonis@6465 | 2060 | if (prev) { |
simonis@6465 | 2061 | prev->set_next(p->next()); |
simonis@6465 | 2062 | } else { |
simonis@6465 | 2063 | g_shmbk_list = p->next(); |
simonis@6465 | 2064 | } |
simonis@6465 | 2065 | g_shmbk_stats.nodes --; |
simonis@6465 | 2066 | g_shmbk_stats.bytes -= p->size(); |
simonis@6465 | 2067 | return; |
simonis@6465 | 2068 | } |
simonis@6465 | 2069 | prev = p; |
simonis@6465 | 2070 | p = p->next(); |
simonis@6465 | 2071 | } |
simonis@6465 | 2072 | assert(false, "should not happen"); |
simonis@6465 | 2073 | } |
simonis@6465 | 2074 | |
simonis@6465 | 2075 | // given a pointer, return shared memory bookkeeping record for the segment it points into |
simonis@6465 | 2076 | // using the returned block info must happen under lock protection |
simonis@6465 | 2077 | static ShmBkBlock* shmbk_find_by_containing_address(const char* addr) { |
simonis@6465 | 2078 | g_shmbk_stats.lookups ++; |
simonis@6465 | 2079 | ShmBkBlock* p = g_shmbk_list; |
simonis@6465 | 2080 | while (p) { |
simonis@6465 | 2081 | if (p->containsAddress(addr)) { |
simonis@6465 | 2082 | return p; |
simonis@6465 | 2083 | } |
simonis@6465 | 2084 | p = p->next(); |
simonis@6465 | 2085 | } |
simonis@6465 | 2086 | return NULL; |
simonis@6465 | 2087 | } |
simonis@6465 | 2088 | |
simonis@6465 | 2089 | // dump all information about all memory segments allocated with os::reserve_memory() |
simonis@6465 | 2090 | void shmbk_dump_info() { |
simonis@6465 | 2091 | tty->print_cr("-- shared mem bookkeeping (alive: %d segments, %llu bytes, " |
simonis@6465 | 2092 | "total reserves: %d total lookups: %d)", |
simonis@6465 | 2093 | g_shmbk_stats.nodes, g_shmbk_stats.bytes, g_shmbk_stats.reserves, g_shmbk_stats.lookups); |
simonis@6465 | 2094 | const ShmBkBlock* p = g_shmbk_list; |
simonis@6465 | 2095 | int i = 0; |
simonis@6465 | 2096 | while (p) { |
simonis@6465 | 2097 | p->print(tty); |
simonis@6465 | 2098 | p = p->next(); |
simonis@6465 | 2099 | i ++; |
simonis@6465 | 2100 | } |
simonis@6465 | 2101 | } |
simonis@6465 | 2102 | |
simonis@6465 | 2103 | #define LOCK_SHMBK { ThreadCritical _LOCK_SHMBK; |
simonis@6465 | 2104 | #define UNLOCK_SHMBK } |
simonis@6465 | 2105 | |
simonis@6465 | 2106 | // End: shared memory bookkeeping |
simonis@6465 | 2107 | //////////////////////////////////////////////////////////////////////////////////////////////////// |
simonis@6465 | 2108 | |
simonis@6465 | 2109 | int os::vm_page_size() { |
simonis@6465 | 2110 | // Seems redundant as all get out |
simonis@6465 | 2111 | assert(os::Aix::page_size() != -1, "must call os::init"); |
simonis@6465 | 2112 | return os::Aix::page_size(); |
simonis@6465 | 2113 | } |
simonis@6465 | 2114 | |
simonis@6465 | 2115 | // Aix allocates memory by pages. |
simonis@6465 | 2116 | int os::vm_allocation_granularity() { |
simonis@6465 | 2117 | assert(os::Aix::page_size() != -1, "must call os::init"); |
simonis@6465 | 2118 | return os::Aix::page_size(); |
simonis@6465 | 2119 | } |
simonis@6465 | 2120 | |
simonis@6465 | 2121 | int os::Aix::commit_memory_impl(char* addr, size_t size, bool exec) { |
simonis@6465 | 2122 | |
simonis@6465 | 2123 | // Commit is a noop. There is no explicit commit |
simonis@6465 | 2124 | // needed on AIX. Memory is committed when touched. |
simonis@6465 | 2125 | // |
simonis@6465 | 2126 | // Debug : check address range for validity |
simonis@6465 | 2127 | #ifdef ASSERT |
simonis@6465 | 2128 | LOCK_SHMBK |
simonis@6465 | 2129 | ShmBkBlock* const block = shmbk_find_by_containing_address(addr); |
simonis@6465 | 2130 | if (!block) { |
simonis@6465 | 2131 | fprintf(stderr, "invalid pointer: " INTPTR_FORMAT "\n", addr); |
simonis@6465 | 2132 | shmbk_dump_info(); |
simonis@6465 | 2133 | assert(false, "invalid pointer"); |
simonis@6465 | 2134 | return false; |
simonis@6465 | 2135 | } else if (!block->containsRange(addr, size)) { |
simonis@6465 | 2136 | fprintf(stderr, "invalid range: " INTPTR_FORMAT " .. " INTPTR_FORMAT "\n", addr, addr + size); |
simonis@6465 | 2137 | shmbk_dump_info(); |
simonis@6465 | 2138 | assert(false, "invalid range"); |
simonis@6465 | 2139 | return false; |
simonis@6465 | 2140 | } |
simonis@6465 | 2141 | UNLOCK_SHMBK |
simonis@6465 | 2142 | #endif // ASSERT |
simonis@6465 | 2143 | |
simonis@6465 | 2144 | return 0; |
simonis@6465 | 2145 | } |
simonis@6465 | 2146 | |
simonis@6465 | 2147 | bool os::pd_commit_memory(char* addr, size_t size, bool exec) { |
simonis@6465 | 2148 | return os::Aix::commit_memory_impl(addr, size, exec) == 0; |
simonis@6465 | 2149 | } |
simonis@6465 | 2150 | |
simonis@6465 | 2151 | void os::pd_commit_memory_or_exit(char* addr, size_t size, bool exec, |
simonis@6465 | 2152 | const char* mesg) { |
simonis@6465 | 2153 | assert(mesg != NULL, "mesg must be specified"); |
simonis@6465 | 2154 | os::Aix::commit_memory_impl(addr, size, exec); |
simonis@6465 | 2155 | } |
simonis@6465 | 2156 | |
simonis@6465 | 2157 | int os::Aix::commit_memory_impl(char* addr, size_t size, |
simonis@6465 | 2158 | size_t alignment_hint, bool exec) { |
simonis@6465 | 2159 | return os::Aix::commit_memory_impl(addr, size, exec); |
simonis@6465 | 2160 | } |
simonis@6465 | 2161 | |
simonis@6465 | 2162 | bool os::pd_commit_memory(char* addr, size_t size, size_t alignment_hint, |
simonis@6465 | 2163 | bool exec) { |
simonis@6465 | 2164 | return os::Aix::commit_memory_impl(addr, size, alignment_hint, exec) == 0; |
simonis@6465 | 2165 | } |
simonis@6465 | 2166 | |
simonis@6465 | 2167 | void os::pd_commit_memory_or_exit(char* addr, size_t size, |
simonis@6465 | 2168 | size_t alignment_hint, bool exec, |
simonis@6465 | 2169 | const char* mesg) { |
simonis@6465 | 2170 | os::Aix::commit_memory_impl(addr, size, alignment_hint, exec); |
simonis@6465 | 2171 | } |
simonis@6465 | 2172 | |
simonis@6465 | 2173 | bool os::pd_uncommit_memory(char* addr, size_t size) { |
simonis@6465 | 2174 | |
simonis@6465 | 2175 | // Delegate to ShmBkBlock class which knows how to uncommit its memory. |
simonis@6465 | 2176 | |
simonis@6465 | 2177 | bool rc = false; |
simonis@6465 | 2178 | LOCK_SHMBK |
simonis@6465 | 2179 | ShmBkBlock* const block = shmbk_find_by_containing_address(addr); |
simonis@6465 | 2180 | if (!block) { |
simonis@6465 | 2181 | fprintf(stderr, "invalid pointer: 0x%p.\n", addr); |
simonis@6465 | 2182 | shmbk_dump_info(); |
simonis@6465 | 2183 | assert(false, "invalid pointer"); |
simonis@6465 | 2184 | return false; |
simonis@6465 | 2185 | } else if (!block->containsRange(addr, size)) { |
simonis@6465 | 2186 | fprintf(stderr, "invalid range: 0x%p .. 0x%p.\n", addr, addr + size); |
simonis@6465 | 2187 | shmbk_dump_info(); |
simonis@6465 | 2188 | assert(false, "invalid range"); |
simonis@6465 | 2189 | return false; |
simonis@6465 | 2190 | } |
simonis@6465 | 2191 | rc = block->disclaim(addr, size); |
simonis@6465 | 2192 | UNLOCK_SHMBK |
simonis@6465 | 2193 | |
simonis@6465 | 2194 | if (Verbose && !rc) { |
simonis@6465 | 2195 | warning("failed to disclaim 0x%p .. 0x%p (0x%llX bytes).", addr, addr + size, size); |
simonis@6465 | 2196 | } |
simonis@6465 | 2197 | return rc; |
simonis@6465 | 2198 | } |
simonis@6465 | 2199 | |
simonis@6465 | 2200 | bool os::pd_create_stack_guard_pages(char* addr, size_t size) { |
simonis@6465 | 2201 | return os::guard_memory(addr, size); |
simonis@6465 | 2202 | } |
simonis@6465 | 2203 | |
simonis@6465 | 2204 | bool os::remove_stack_guard_pages(char* addr, size_t size) { |
simonis@6465 | 2205 | return os::unguard_memory(addr, size); |
simonis@6465 | 2206 | } |
simonis@6465 | 2207 | |
simonis@6465 | 2208 | void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { |
simonis@6465 | 2209 | } |
simonis@6465 | 2210 | |
simonis@6465 | 2211 | void os::pd_free_memory(char *addr, size_t bytes, size_t alignment_hint) { |
simonis@6465 | 2212 | } |
simonis@6465 | 2213 | |
simonis@6465 | 2214 | void os::numa_make_global(char *addr, size_t bytes) { |
simonis@6465 | 2215 | } |
simonis@6465 | 2216 | |
simonis@6465 | 2217 | void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { |
simonis@6465 | 2218 | } |
simonis@6465 | 2219 | |
simonis@6465 | 2220 | bool os::numa_topology_changed() { |
simonis@6465 | 2221 | return false; |
simonis@6465 | 2222 | } |
simonis@6465 | 2223 | |
simonis@6465 | 2224 | size_t os::numa_get_groups_num() { |
simonis@6465 | 2225 | return 1; |
simonis@6465 | 2226 | } |
simonis@6465 | 2227 | |
simonis@6465 | 2228 | int os::numa_get_group_id() { |
simonis@6465 | 2229 | return 0; |
simonis@6465 | 2230 | } |
simonis@6465 | 2231 | |
simonis@6465 | 2232 | size_t os::numa_get_leaf_groups(int *ids, size_t size) { |
simonis@6465 | 2233 | if (size > 0) { |
simonis@6465 | 2234 | ids[0] = 0; |
simonis@6465 | 2235 | return 1; |
simonis@6465 | 2236 | } |
simonis@6465 | 2237 | return 0; |
simonis@6465 | 2238 | } |
simonis@6465 | 2239 | |
simonis@6465 | 2240 | bool os::get_page_info(char *start, page_info* info) { |
simonis@6465 | 2241 | return false; |
simonis@6465 | 2242 | } |
simonis@6465 | 2243 | |
simonis@6465 | 2244 | char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { |
simonis@6465 | 2245 | return end; |
simonis@6465 | 2246 | } |
simonis@6465 | 2247 | |
simonis@6465 | 2248 | // Flags for reserve_shmatted_memory: |
simonis@6465 | 2249 | #define RESSHM_WISHADDR_OR_FAIL 1 |
simonis@6465 | 2250 | #define RESSHM_TRY_16M_PAGES 2 |
simonis@6465 | 2251 | #define RESSHM_16M_PAGES_OR_FAIL 4 |
simonis@6465 | 2252 | |
simonis@6465 | 2253 | // Result of reserve_shmatted_memory: |
simonis@6465 | 2254 | struct shmatted_memory_info_t { |
simonis@6465 | 2255 | char* addr; |
simonis@6465 | 2256 | size_t pagesize; |
simonis@6465 | 2257 | bool pinned; |
simonis@6465 | 2258 | }; |
simonis@6465 | 2259 | |
simonis@6465 | 2260 | // Reserve a section of shmatted memory. |
simonis@6465 | 2261 | // params: |
simonis@6465 | 2262 | // bytes [in]: size of memory, in bytes |
simonis@6465 | 2263 | // requested_addr [in]: wish address. |
simonis@6465 | 2264 | // NULL = no wish. |
simonis@6465 | 2265 | // If RESSHM_WISHADDR_OR_FAIL is set in flags and wish address cannot |
simonis@6465 | 2266 | // be obtained, function will fail. Otherwise wish address is treated as hint and |
simonis@6465 | 2267 | // another pointer is returned. |
simonis@6465 | 2268 | // flags [in]: some flags. Valid flags are: |
simonis@6465 | 2269 | // RESSHM_WISHADDR_OR_FAIL - fail if wish address is given and cannot be obtained. |
simonis@6465 | 2270 | // RESSHM_TRY_16M_PAGES - try to allocate from 16M page pool |
simonis@6465 | 2271 | // (requires UseLargePages and Use16MPages) |
simonis@6465 | 2272 | // RESSHM_16M_PAGES_OR_FAIL - if you cannot allocate from 16M page pool, fail. |
simonis@6465 | 2273 | // Otherwise any other page size will do. |
simonis@6465 | 2274 | // p_info [out] : holds information about the created shared memory segment. |
simonis@6465 | 2275 | static bool reserve_shmatted_memory(size_t bytes, char* requested_addr, int flags, shmatted_memory_info_t* p_info) { |
simonis@6465 | 2276 | |
simonis@6465 | 2277 | assert(p_info, "parameter error"); |
simonis@6465 | 2278 | |
simonis@6465 | 2279 | // init output struct. |
simonis@6465 | 2280 | p_info->addr = NULL; |
simonis@6465 | 2281 | |
simonis@6465 | 2282 | // neither should we be here for EXTSHM=ON. |
simonis@6465 | 2283 | if (os::Aix::extshm()) { |
simonis@6465 | 2284 | ShouldNotReachHere(); |
simonis@6465 | 2285 | } |
simonis@6465 | 2286 | |
simonis@6465 | 2287 | // extract flags. sanity checks. |
simonis@6465 | 2288 | const bool wishaddr_or_fail = |
simonis@6465 | 2289 | flags & RESSHM_WISHADDR_OR_FAIL; |
simonis@6465 | 2290 | const bool try_16M_pages = |
simonis@6465 | 2291 | flags & RESSHM_TRY_16M_PAGES; |
simonis@6465 | 2292 | const bool f16M_pages_or_fail = |
simonis@6465 | 2293 | flags & RESSHM_16M_PAGES_OR_FAIL; |
simonis@6465 | 2294 | |
simonis@6465 | 2295 | // first check: if a wish address is given and it is mandatory, but not aligned to segment boundary, |
simonis@6465 | 2296 | // shmat will fail anyway, so save some cycles by failing right away |
simonis@6465 | 2297 | if (requested_addr && ((uintptr_t)requested_addr % SIZE_256M == 0)) { |
simonis@6465 | 2298 | if (wishaddr_or_fail) { |
simonis@6465 | 2299 | return false; |
simonis@6465 | 2300 | } else { |
simonis@6465 | 2301 | requested_addr = NULL; |
simonis@6465 | 2302 | } |
simonis@6465 | 2303 | } |
simonis@6465 | 2304 | |
simonis@6465 | 2305 | char* addr = NULL; |
simonis@6465 | 2306 | |
simonis@6465 | 2307 | // Align size of shm up to the largest possible page size, to avoid errors later on when we try to change |
simonis@6465 | 2308 | // pagesize dynamically. |
simonis@6465 | 2309 | const size_t size = align_size_up(bytes, SIZE_16M); |
simonis@6465 | 2310 | |
simonis@6465 | 2311 | // reserve the shared segment |
simonis@6465 | 2312 | int shmid = shmget(IPC_PRIVATE, size, IPC_CREAT | S_IRUSR | S_IWUSR); |
simonis@6465 | 2313 | if (shmid == -1) { |
simonis@6465 | 2314 | warning("shmget(.., %lld, ..) failed (errno: %d).", size, errno); |
simonis@6465 | 2315 | return false; |
simonis@6465 | 2316 | } |
simonis@6465 | 2317 | |
simonis@6465 | 2318 | // Important note: |
simonis@6465 | 2319 | // It is very important that we, upon leaving this function, do not leave a shm segment alive. |
simonis@6465 | 2320 | // We must right after attaching it remove it from the system. System V shm segments are global and |
simonis@6465 | 2321 | // survive the process. |
simonis@6465 | 2322 | // So, from here on: Do not assert. Do not return. Always do a "goto cleanup_shm". |
simonis@6465 | 2323 | |
simonis@6465 | 2324 | // try forcing the page size |
simonis@6465 | 2325 | size_t pagesize = -1; // unknown so far |
simonis@6465 | 2326 | |
simonis@6465 | 2327 | if (UseLargePages) { |
simonis@6465 | 2328 | |
simonis@6465 | 2329 | struct shmid_ds shmbuf; |
simonis@6465 | 2330 | memset(&shmbuf, 0, sizeof(shmbuf)); |
simonis@6465 | 2331 | |
simonis@6465 | 2332 | // First, try to take from 16M page pool if... |
simonis@6465 | 2333 | if (os::Aix::can_use_16M_pages() // we can ... |
simonis@6465 | 2334 | && Use16MPages // we are not explicitly forbidden to do so (-XX:-Use16MPages).. |
simonis@6465 | 2335 | && try_16M_pages) { // caller wants us to. |
simonis@6465 | 2336 | shmbuf.shm_pagesize = SIZE_16M; |
simonis@6465 | 2337 | if (shmctl(shmid, SHM_PAGESIZE, &shmbuf) == 0) { |
simonis@6465 | 2338 | pagesize = SIZE_16M; |
simonis@6465 | 2339 | } else { |
simonis@6465 | 2340 | warning("Failed to allocate %d 16M pages. 16M page pool might be exhausted. (shmctl failed with %d)", |
simonis@6465 | 2341 | size / SIZE_16M, errno); |
simonis@6465 | 2342 | if (f16M_pages_or_fail) { |
simonis@6465 | 2343 | goto cleanup_shm; |
simonis@6465 | 2344 | } |
simonis@6465 | 2345 | } |
simonis@6465 | 2346 | } |
simonis@6465 | 2347 | |
simonis@6465 | 2348 | // Nothing yet? Try setting 64K pages. Note that I never saw this fail, but in theory it might, |
simonis@6465 | 2349 | // because the 64K page pool may also be exhausted. |
simonis@6465 | 2350 | if (pagesize == -1) { |
simonis@6465 | 2351 | shmbuf.shm_pagesize = SIZE_64K; |
simonis@6465 | 2352 | if (shmctl(shmid, SHM_PAGESIZE, &shmbuf) == 0) { |
simonis@6465 | 2353 | pagesize = SIZE_64K; |
simonis@6465 | 2354 | } else { |
simonis@6465 | 2355 | warning("Failed to allocate %d 64K pages. (shmctl failed with %d)", |
simonis@6465 | 2356 | size / SIZE_64K, errno); |
simonis@6465 | 2357 | // here I give up. leave page_size -1 - later, after attaching, we will query the |
simonis@6465 | 2358 | // real page size of the attached memory. (in theory, it may be something different |
simonis@6465 | 2359 | // from 4K if LDR_CNTRL SHM_PSIZE is set) |
simonis@6465 | 2360 | } |
simonis@6465 | 2361 | } |
simonis@6465 | 2362 | } |
simonis@6465 | 2363 | |
simonis@6465 | 2364 | // sanity point |
simonis@6465 | 2365 | assert(pagesize == -1 || pagesize == SIZE_16M || pagesize == SIZE_64K, "wrong page size"); |
simonis@6465 | 2366 | |
simonis@6465 | 2367 | // Now attach the shared segment. |
simonis@6465 | 2368 | addr = (char*) shmat(shmid, requested_addr, 0); |
simonis@6465 | 2369 | if (addr == (char*)-1) { |
simonis@6465 | 2370 | // How to handle attach failure: |
simonis@6465 | 2371 | // If it failed for a specific wish address, tolerate this: in that case, if wish address was |
simonis@6465 | 2372 | // mandatory, fail, if not, retry anywhere. |
simonis@6465 | 2373 | // If it failed for any other reason, treat that as fatal error. |
simonis@6465 | 2374 | addr = NULL; |
simonis@6465 | 2375 | if (requested_addr) { |
simonis@6465 | 2376 | if (wishaddr_or_fail) { |
simonis@6465 | 2377 | goto cleanup_shm; |
simonis@6465 | 2378 | } else { |
simonis@6465 | 2379 | addr = (char*) shmat(shmid, NULL, 0); |
simonis@6465 | 2380 | if (addr == (char*)-1) { // fatal |
simonis@6465 | 2381 | addr = NULL; |
simonis@6465 | 2382 | warning("shmat failed (errno: %d)", errno); |
simonis@6465 | 2383 | goto cleanup_shm; |
simonis@6465 | 2384 | } |
simonis@6465 | 2385 | } |
simonis@6465 | 2386 | } else { // fatal |
simonis@6465 | 2387 | addr = NULL; |
simonis@6465 | 2388 | warning("shmat failed (errno: %d)", errno); |
simonis@6465 | 2389 | goto cleanup_shm; |
simonis@6465 | 2390 | } |
simonis@6465 | 2391 | } |
simonis@6465 | 2392 | |
simonis@6465 | 2393 | // sanity point |
simonis@6465 | 2394 | assert(addr && addr != (char*) -1, "wrong address"); |
simonis@6465 | 2395 | |
simonis@6465 | 2396 | // after successful Attach remove the segment - right away. |
simonis@6465 | 2397 | if (::shmctl(shmid, IPC_RMID, NULL) == -1) { |
simonis@6465 | 2398 | warning("shmctl(%u, IPC_RMID) failed (%d)\n", shmid, errno); |
simonis@6465 | 2399 | guarantee(false, "failed to remove shared memory segment!"); |
simonis@6465 | 2400 | } |
simonis@6465 | 2401 | shmid = -1; |
simonis@6465 | 2402 | |
simonis@6465 | 2403 | // query the real page size. In case setting the page size did not work (see above), the system |
simonis@6465 | 2404 | // may have given us something other then 4K (LDR_CNTRL) |
simonis@6465 | 2405 | { |
simonis@6465 | 2406 | const size_t real_pagesize = os::Aix::query_pagesize(addr); |
simonis@6465 | 2407 | if (pagesize != -1) { |
simonis@6465 | 2408 | assert(pagesize == real_pagesize, "unexpected pagesize after shmat"); |
simonis@6465 | 2409 | } else { |
simonis@6465 | 2410 | pagesize = real_pagesize; |
simonis@6465 | 2411 | } |
simonis@6465 | 2412 | } |
simonis@6465 | 2413 | |
simonis@6465 | 2414 | // Now register the reserved block with internal book keeping. |
simonis@6465 | 2415 | LOCK_SHMBK |
simonis@6465 | 2416 | const bool pinned = pagesize >= SIZE_16M ? true : false; |
simonis@6465 | 2417 | ShmBkShmatedBlock* const p_block = new ShmBkShmatedBlock(AddrRange(addr, size), pagesize, pinned); |
simonis@6465 | 2418 | assert(p_block, ""); |
simonis@6465 | 2419 | shmbk_register(p_block); |
simonis@6465 | 2420 | UNLOCK_SHMBK |
simonis@6465 | 2421 | |
simonis@6465 | 2422 | cleanup_shm: |
simonis@6465 | 2423 | |
simonis@6465 | 2424 | // if we have not done so yet, remove the shared memory segment. This is very important. |
simonis@6465 | 2425 | if (shmid != -1) { |
simonis@6465 | 2426 | if (::shmctl(shmid, IPC_RMID, NULL) == -1) { |
simonis@6465 | 2427 | warning("shmctl(%u, IPC_RMID) failed (%d)\n", shmid, errno); |
simonis@6465 | 2428 | guarantee(false, "failed to remove shared memory segment!"); |
simonis@6465 | 2429 | } |
simonis@6465 | 2430 | shmid = -1; |
simonis@6465 | 2431 | } |
simonis@6465 | 2432 | |
simonis@6465 | 2433 | // trace |
simonis@6465 | 2434 | if (Verbose && !addr) { |
simonis@6465 | 2435 | if (requested_addr != NULL) { |
goetz@6501 | 2436 | warning("failed to shm-allocate 0x%llX bytes at wish address 0x%p.", size, requested_addr); |
simonis@6465 | 2437 | } else { |
simonis@6465 | 2438 | warning("failed to shm-allocate 0x%llX bytes at any address.", size); |
simonis@6465 | 2439 | } |
simonis@6465 | 2440 | } |
simonis@6465 | 2441 | |
simonis@6465 | 2442 | // hand info to caller |
simonis@6465 | 2443 | if (addr) { |
simonis@6465 | 2444 | p_info->addr = addr; |
simonis@6465 | 2445 | p_info->pagesize = pagesize; |
simonis@6465 | 2446 | p_info->pinned = pagesize == SIZE_16M ? true : false; |
simonis@6465 | 2447 | } |
simonis@6465 | 2448 | |
simonis@6465 | 2449 | // sanity test: |
simonis@6465 | 2450 | if (requested_addr && addr && wishaddr_or_fail) { |
simonis@6465 | 2451 | guarantee(addr == requested_addr, "shmat error"); |
simonis@6465 | 2452 | } |
simonis@6465 | 2453 | |
simonis@6465 | 2454 | // just one more test to really make sure we have no dangling shm segments. |
simonis@6465 | 2455 | guarantee(shmid == -1, "dangling shm segments"); |
simonis@6465 | 2456 | |
simonis@6465 | 2457 | return addr ? true : false; |
simonis@6465 | 2458 | |
simonis@6465 | 2459 | } // end: reserve_shmatted_memory |
simonis@6465 | 2460 | |
simonis@6465 | 2461 | // Reserve memory using mmap. Behaves the same as reserve_shmatted_memory(): |
simonis@6465 | 2462 | // will return NULL in case of an error. |
simonis@6465 | 2463 | static char* reserve_mmaped_memory(size_t bytes, char* requested_addr) { |
simonis@6465 | 2464 | |
simonis@6465 | 2465 | // if a wish address is given, but not aligned to 4K page boundary, mmap will fail. |
simonis@6465 | 2466 | if (requested_addr && ((uintptr_t)requested_addr % os::vm_page_size() != 0)) { |
simonis@6465 | 2467 | warning("Wish address 0x%p not aligned to page boundary.", requested_addr); |
simonis@6465 | 2468 | return NULL; |
simonis@6465 | 2469 | } |
simonis@6465 | 2470 | |
simonis@6465 | 2471 | const size_t size = align_size_up(bytes, SIZE_4K); |
simonis@6465 | 2472 | |
simonis@6465 | 2473 | // Note: MAP_SHARED (instead of MAP_PRIVATE) needed to be able to |
simonis@6465 | 2474 | // msync(MS_INVALIDATE) (see os::uncommit_memory) |
simonis@6465 | 2475 | int flags = MAP_ANONYMOUS | MAP_SHARED; |
simonis@6465 | 2476 | |
simonis@6465 | 2477 | // MAP_FIXED is needed to enforce requested_addr - manpage is vague about what |
simonis@6465 | 2478 | // it means if wishaddress is given but MAP_FIXED is not set. |
simonis@6465 | 2479 | // |
simonis@6465 | 2480 | // Note however that this changes semantics in SPEC1170 mode insofar as MAP_FIXED |
simonis@6465 | 2481 | // clobbers the address range, which is probably not what the caller wants. That's |
simonis@6465 | 2482 | // why I assert here (again) that the SPEC1170 compat mode is off. |
simonis@6465 | 2483 | // If we want to be able to run under SPEC1170, we have to do some porting and |
simonis@6465 | 2484 | // testing. |
simonis@6465 | 2485 | if (requested_addr != NULL) { |
simonis@6465 | 2486 | assert(!os::Aix::xpg_sus_mode(), "SPEC1170 mode not allowed."); |
simonis@6465 | 2487 | flags |= MAP_FIXED; |
simonis@6465 | 2488 | } |
simonis@6465 | 2489 | |
simonis@6465 | 2490 | char* addr = (char*)::mmap(requested_addr, size, PROT_READ|PROT_WRITE|PROT_EXEC, flags, -1, 0); |
simonis@6465 | 2491 | |
simonis@6465 | 2492 | if (addr == MAP_FAILED) { |
simonis@6465 | 2493 | // attach failed: tolerate for specific wish addresses. Not being able to attach |
simonis@6465 | 2494 | // anywhere is a fatal error. |
simonis@6465 | 2495 | if (requested_addr == NULL) { |
simonis@6465 | 2496 | // It's ok to fail here if the machine has not enough memory. |
simonis@6465 | 2497 | warning("mmap(NULL, 0x%llX, ..) failed (%d)", size, errno); |
simonis@6465 | 2498 | } |
simonis@6465 | 2499 | addr = NULL; |
simonis@6465 | 2500 | goto cleanup_mmap; |
simonis@6465 | 2501 | } |
simonis@6465 | 2502 | |
simonis@6465 | 2503 | // If we did request a specific address and that address was not available, fail. |
simonis@6465 | 2504 | if (addr && requested_addr) { |
simonis@6465 | 2505 | guarantee(addr == requested_addr, "unexpected"); |
simonis@6465 | 2506 | } |
simonis@6465 | 2507 | |
simonis@6465 | 2508 | // register this mmap'ed segment with book keeping |
simonis@6465 | 2509 | LOCK_SHMBK |
simonis@6465 | 2510 | ShmBkMappedBlock* const p_block = new ShmBkMappedBlock(AddrRange(addr, size)); |
simonis@6465 | 2511 | assert(p_block, ""); |
simonis@6465 | 2512 | shmbk_register(p_block); |
simonis@6465 | 2513 | UNLOCK_SHMBK |
simonis@6465 | 2514 | |
simonis@6465 | 2515 | cleanup_mmap: |
simonis@6465 | 2516 | |
goetz@6501 | 2517 | // trace |
goetz@6501 | 2518 | if (Verbose) { |
goetz@6501 | 2519 | if (addr) { |
simonis@6465 | 2520 | fprintf(stderr, "mmap-allocated 0x%p .. 0x%p (0x%llX bytes)\n", addr, addr + bytes, bytes); |
simonis@6465 | 2521 | } |
goetz@6501 | 2522 | else { |
goetz@6501 | 2523 | if (requested_addr != NULL) { |
goetz@6501 | 2524 | warning("failed to mmap-allocate 0x%llX bytes at wish address 0x%p.", bytes, requested_addr); |
goetz@6501 | 2525 | } else { |
goetz@6501 | 2526 | warning("failed to mmap-allocate 0x%llX bytes at any address.", bytes); |
goetz@6501 | 2527 | } |
simonis@6465 | 2528 | } |
simonis@6465 | 2529 | } |
simonis@6465 | 2530 | |
simonis@6465 | 2531 | return addr; |
simonis@6465 | 2532 | |
simonis@6465 | 2533 | } // end: reserve_mmaped_memory |
simonis@6465 | 2534 | |
simonis@6465 | 2535 | // Reserves and attaches a shared memory segment. |
simonis@6465 | 2536 | // Will assert if a wish address is given and could not be obtained. |
simonis@6465 | 2537 | char* os::pd_reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) { |
simonis@6465 | 2538 | return os::attempt_reserve_memory_at(bytes, requested_addr); |
simonis@6465 | 2539 | } |
simonis@6465 | 2540 | |
simonis@6465 | 2541 | bool os::pd_release_memory(char* addr, size_t size) { |
simonis@6465 | 2542 | |
simonis@6465 | 2543 | // delegate to ShmBkBlock class which knows how to uncommit its memory. |
simonis@6465 | 2544 | |
simonis@6465 | 2545 | bool rc = false; |
simonis@6465 | 2546 | LOCK_SHMBK |
simonis@6465 | 2547 | ShmBkBlock* const block = shmbk_find_by_containing_address(addr); |
simonis@6465 | 2548 | if (!block) { |
simonis@6465 | 2549 | fprintf(stderr, "invalid pointer: 0x%p.\n", addr); |
simonis@6465 | 2550 | shmbk_dump_info(); |
simonis@6465 | 2551 | assert(false, "invalid pointer"); |
simonis@6465 | 2552 | return false; |
simonis@6465 | 2553 | } |
simonis@6465 | 2554 | else if (!block->isSameRange(addr, size)) { |
simonis@6465 | 2555 | if (block->getType() == ShmBkBlock::MMAP) { |
simonis@6465 | 2556 | // Release only the same range or a the beginning or the end of a range. |
simonis@6465 | 2557 | if (block->base() == addr && size < block->size()) { |
simonis@6465 | 2558 | ShmBkMappedBlock* const b = new ShmBkMappedBlock(AddrRange(block->base() + size, block->size() - size)); |
simonis@6465 | 2559 | assert(b, ""); |
simonis@6465 | 2560 | shmbk_register(b); |
simonis@6465 | 2561 | block->setAddrRange(AddrRange(addr, size)); |
simonis@6465 | 2562 | } |
simonis@6465 | 2563 | else if (addr > block->base() && addr + size == block->base() + block->size()) { |
simonis@6465 | 2564 | ShmBkMappedBlock* const b = new ShmBkMappedBlock(AddrRange(block->base(), block->size() - size)); |
simonis@6465 | 2565 | assert(b, ""); |
simonis@6465 | 2566 | shmbk_register(b); |
simonis@6465 | 2567 | block->setAddrRange(AddrRange(addr, size)); |
simonis@6465 | 2568 | } |
simonis@6465 | 2569 | else { |
simonis@6465 | 2570 | fprintf(stderr, "invalid mmap range: 0x%p .. 0x%p.\n", addr, addr + size); |
simonis@6465 | 2571 | shmbk_dump_info(); |
simonis@6465 | 2572 | assert(false, "invalid mmap range"); |
simonis@6465 | 2573 | return false; |
simonis@6465 | 2574 | } |
simonis@6465 | 2575 | } |
simonis@6465 | 2576 | else { |
simonis@6465 | 2577 | // Release only the same range. No partial release allowed. |
simonis@6465 | 2578 | // Soften the requirement a bit, because the user may think he owns a smaller size |
simonis@6465 | 2579 | // than the block is due to alignment etc. |
simonis@6465 | 2580 | if (block->base() != addr || block->size() < size) { |
simonis@6465 | 2581 | fprintf(stderr, "invalid shmget range: 0x%p .. 0x%p.\n", addr, addr + size); |
simonis@6465 | 2582 | shmbk_dump_info(); |
simonis@6465 | 2583 | assert(false, "invalid shmget range"); |
simonis@6465 | 2584 | return false; |
simonis@6465 | 2585 | } |
simonis@6465 | 2586 | } |
simonis@6465 | 2587 | } |
simonis@6465 | 2588 | rc = block->release(); |
simonis@6465 | 2589 | assert(rc, "release failed"); |
simonis@6465 | 2590 | // remove block from bookkeeping |
simonis@6465 | 2591 | shmbk_unregister(block); |
simonis@6465 | 2592 | delete block; |
simonis@6465 | 2593 | UNLOCK_SHMBK |
simonis@6465 | 2594 | |
simonis@6465 | 2595 | if (!rc) { |
simonis@6465 | 2596 | warning("failed to released %lu bytes at 0x%p", size, addr); |
simonis@6465 | 2597 | } |
simonis@6465 | 2598 | |
simonis@6465 | 2599 | return rc; |
simonis@6465 | 2600 | } |
simonis@6465 | 2601 | |
simonis@6465 | 2602 | static bool checked_mprotect(char* addr, size_t size, int prot) { |
simonis@6465 | 2603 | |
simonis@6465 | 2604 | // Little problem here: if SPEC1170 behaviour is off, mprotect() on AIX will |
simonis@6465 | 2605 | // not tell me if protection failed when trying to protect an un-protectable range. |
simonis@6465 | 2606 | // |
simonis@6465 | 2607 | // This means if the memory was allocated using shmget/shmat, protection wont work |
simonis@6465 | 2608 | // but mprotect will still return 0: |
simonis@6465 | 2609 | // |
simonis@6465 | 2610 | // See http://publib.boulder.ibm.com/infocenter/pseries/v5r3/index.jsp?topic=/com.ibm.aix.basetechref/doc/basetrf1/mprotect.htm |
simonis@6465 | 2611 | |
simonis@6465 | 2612 | bool rc = ::mprotect(addr, size, prot) == 0 ? true : false; |
simonis@6465 | 2613 | |
simonis@6465 | 2614 | if (!rc) { |
simonis@6465 | 2615 | const char* const s_errno = strerror(errno); |
simonis@6465 | 2616 | warning("mprotect(" PTR_FORMAT "-" PTR_FORMAT ", 0x%X) failed (%s).", addr, addr + size, prot, s_errno); |
simonis@6465 | 2617 | return false; |
simonis@6465 | 2618 | } |
simonis@6465 | 2619 | |
simonis@6465 | 2620 | // mprotect success check |
simonis@6465 | 2621 | // |
simonis@6465 | 2622 | // Mprotect said it changed the protection but can I believe it? |
simonis@6465 | 2623 | // |
simonis@6465 | 2624 | // To be sure I need to check the protection afterwards. Try to |
simonis@6465 | 2625 | // read from protected memory and check whether that causes a segfault. |
simonis@6465 | 2626 | // |
simonis@6465 | 2627 | if (!os::Aix::xpg_sus_mode()) { |
simonis@6465 | 2628 | |
simonis@6465 | 2629 | if (StubRoutines::SafeFetch32_stub()) { |
simonis@6465 | 2630 | |
simonis@6465 | 2631 | const bool read_protected = |
simonis@6465 | 2632 | (SafeFetch32((int*)addr, 0x12345678) == 0x12345678 && |
simonis@6465 | 2633 | SafeFetch32((int*)addr, 0x76543210) == 0x76543210) ? true : false; |
simonis@6465 | 2634 | |
simonis@6465 | 2635 | if (prot & PROT_READ) { |
simonis@6465 | 2636 | rc = !read_protected; |
simonis@6465 | 2637 | } else { |
simonis@6465 | 2638 | rc = read_protected; |
simonis@6465 | 2639 | } |
simonis@6465 | 2640 | } |
simonis@6465 | 2641 | } |
simonis@6465 | 2642 | if (!rc) { |
simonis@6465 | 2643 | assert(false, "mprotect failed."); |
simonis@6465 | 2644 | } |
simonis@6465 | 2645 | return rc; |
simonis@6465 | 2646 | } |
simonis@6465 | 2647 | |
simonis@6465 | 2648 | // Set protections specified |
simonis@6465 | 2649 | bool os::protect_memory(char* addr, size_t size, ProtType prot, bool is_committed) { |
simonis@6465 | 2650 | unsigned int p = 0; |
simonis@6465 | 2651 | switch (prot) { |
simonis@6465 | 2652 | case MEM_PROT_NONE: p = PROT_NONE; break; |
simonis@6465 | 2653 | case MEM_PROT_READ: p = PROT_READ; break; |
simonis@6465 | 2654 | case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; |
simonis@6465 | 2655 | case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; |
simonis@6465 | 2656 | default: |
simonis@6465 | 2657 | ShouldNotReachHere(); |
simonis@6465 | 2658 | } |
simonis@6465 | 2659 | // is_committed is unused. |
simonis@6465 | 2660 | return checked_mprotect(addr, size, p); |
simonis@6465 | 2661 | } |
simonis@6465 | 2662 | |
simonis@6465 | 2663 | bool os::guard_memory(char* addr, size_t size) { |
simonis@6465 | 2664 | return checked_mprotect(addr, size, PROT_NONE); |
simonis@6465 | 2665 | } |
simonis@6465 | 2666 | |
simonis@6465 | 2667 | bool os::unguard_memory(char* addr, size_t size) { |
simonis@6465 | 2668 | return checked_mprotect(addr, size, PROT_READ|PROT_WRITE|PROT_EXEC); |
simonis@6465 | 2669 | } |
simonis@6465 | 2670 | |
simonis@6465 | 2671 | // Large page support |
simonis@6465 | 2672 | |
simonis@6465 | 2673 | static size_t _large_page_size = 0; |
simonis@6465 | 2674 | |
simonis@6465 | 2675 | // Enable large page support if OS allows that. |
simonis@6465 | 2676 | void os::large_page_init() { |
simonis@6465 | 2677 | |
simonis@6465 | 2678 | // Note: os::Aix::query_multipage_support must run first. |
simonis@6465 | 2679 | |
simonis@6465 | 2680 | if (!UseLargePages) { |
simonis@6465 | 2681 | return; |
simonis@6465 | 2682 | } |
simonis@6465 | 2683 | |
simonis@6465 | 2684 | if (!Aix::can_use_64K_pages()) { |
simonis@6465 | 2685 | assert(!Aix::can_use_16M_pages(), "64K is a precondition for 16M."); |
simonis@6465 | 2686 | UseLargePages = false; |
simonis@6465 | 2687 | return; |
simonis@6465 | 2688 | } |
simonis@6465 | 2689 | |
simonis@6465 | 2690 | if (!Aix::can_use_16M_pages() && Use16MPages) { |
simonis@6465 | 2691 | fprintf(stderr, "Cannot use 16M pages. Please ensure that there is a 16M page pool " |
simonis@6465 | 2692 | " and that the VM runs with CAP_BYPASS_RAC_VMM and CAP_PROPAGATE capabilities.\n"); |
simonis@6465 | 2693 | } |
simonis@6465 | 2694 | |
simonis@6465 | 2695 | // Do not report 16M page alignment as part of os::_page_sizes if we are |
simonis@6465 | 2696 | // explicitly forbidden from using 16M pages. Doing so would increase the |
simonis@6465 | 2697 | // alignment the garbage collector calculates with, slightly increasing |
simonis@6465 | 2698 | // heap usage. We should only pay for 16M alignment if we really want to |
simonis@6465 | 2699 | // use 16M pages. |
simonis@6465 | 2700 | if (Use16MPages && Aix::can_use_16M_pages()) { |
simonis@6465 | 2701 | _large_page_size = SIZE_16M; |
simonis@6465 | 2702 | _page_sizes[0] = SIZE_16M; |
simonis@6465 | 2703 | _page_sizes[1] = SIZE_64K; |
simonis@6465 | 2704 | _page_sizes[2] = SIZE_4K; |
simonis@6465 | 2705 | _page_sizes[3] = 0; |
simonis@6465 | 2706 | } else if (Aix::can_use_64K_pages()) { |
simonis@6465 | 2707 | _large_page_size = SIZE_64K; |
simonis@6465 | 2708 | _page_sizes[0] = SIZE_64K; |
simonis@6465 | 2709 | _page_sizes[1] = SIZE_4K; |
simonis@6465 | 2710 | _page_sizes[2] = 0; |
simonis@6465 | 2711 | } |
simonis@6465 | 2712 | |
simonis@6465 | 2713 | if (Verbose) { |
simonis@6465 | 2714 | ("Default large page size is 0x%llX.", _large_page_size); |
simonis@6465 | 2715 | } |
simonis@6465 | 2716 | } // end: os::large_page_init() |
simonis@6465 | 2717 | |
simonis@6465 | 2718 | char* os::reserve_memory_special(size_t bytes, size_t alignment, char* req_addr, bool exec) { |
simonis@6465 | 2719 | // "exec" is passed in but not used. Creating the shared image for |
simonis@6465 | 2720 | // the code cache doesn't have an SHM_X executable permission to check. |
simonis@6465 | 2721 | Unimplemented(); |
simonis@6465 | 2722 | return 0; |
simonis@6465 | 2723 | } |
simonis@6465 | 2724 | |
simonis@6465 | 2725 | bool os::release_memory_special(char* base, size_t bytes) { |
simonis@6465 | 2726 | // detaching the SHM segment will also delete it, see reserve_memory_special() |
simonis@6465 | 2727 | Unimplemented(); |
simonis@6465 | 2728 | return false; |
simonis@6465 | 2729 | } |
simonis@6465 | 2730 | |
simonis@6465 | 2731 | size_t os::large_page_size() { |
simonis@6465 | 2732 | return _large_page_size; |
simonis@6465 | 2733 | } |
simonis@6465 | 2734 | |
simonis@6465 | 2735 | bool os::can_commit_large_page_memory() { |
simonis@6465 | 2736 | // Well, sadly we cannot commit anything at all (see comment in |
simonis@6465 | 2737 | // os::commit_memory) but we claim to so we can make use of large pages |
simonis@6465 | 2738 | return true; |
simonis@6465 | 2739 | } |
simonis@6465 | 2740 | |
simonis@6465 | 2741 | bool os::can_execute_large_page_memory() { |
simonis@6465 | 2742 | // We can do that |
simonis@6465 | 2743 | return true; |
simonis@6465 | 2744 | } |
simonis@6465 | 2745 | |
simonis@6465 | 2746 | // Reserve memory at an arbitrary address, only if that area is |
simonis@6465 | 2747 | // available (and not reserved for something else). |
simonis@6465 | 2748 | char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { |
simonis@6465 | 2749 | |
simonis@6465 | 2750 | bool use_mmap = false; |
simonis@6465 | 2751 | |
simonis@6465 | 2752 | // mmap: smaller graining, no large page support |
simonis@6465 | 2753 | // shm: large graining (256M), large page support, limited number of shm segments |
simonis@6465 | 2754 | // |
simonis@6465 | 2755 | // Prefer mmap wherever we either do not need large page support or have OS limits |
simonis@6465 | 2756 | |
simonis@6465 | 2757 | if (!UseLargePages || bytes < SIZE_16M) { |
simonis@6465 | 2758 | use_mmap = true; |
simonis@6465 | 2759 | } |
simonis@6465 | 2760 | |
simonis@6465 | 2761 | char* addr = NULL; |
simonis@6465 | 2762 | if (use_mmap) { |
simonis@6465 | 2763 | addr = reserve_mmaped_memory(bytes, requested_addr); |
simonis@6465 | 2764 | } else { |
simonis@6465 | 2765 | // shmat: wish address is mandatory, and do not try 16M pages here. |
simonis@6465 | 2766 | shmatted_memory_info_t info; |
simonis@6465 | 2767 | const int flags = RESSHM_WISHADDR_OR_FAIL; |
simonis@6465 | 2768 | if (reserve_shmatted_memory(bytes, requested_addr, flags, &info)) { |
simonis@6465 | 2769 | addr = info.addr; |
simonis@6465 | 2770 | } |
simonis@6465 | 2771 | } |
simonis@6465 | 2772 | |
simonis@6465 | 2773 | return addr; |
simonis@6465 | 2774 | } |
simonis@6465 | 2775 | |
simonis@6465 | 2776 | size_t os::read(int fd, void *buf, unsigned int nBytes) { |
simonis@6465 | 2777 | return ::read(fd, buf, nBytes); |
simonis@6465 | 2778 | } |
simonis@6465 | 2779 | |
simonis@6465 | 2780 | #define NANOSECS_PER_MILLISEC 1000000 |
simonis@6465 | 2781 | |
simonis@6465 | 2782 | int os::sleep(Thread* thread, jlong millis, bool interruptible) { |
simonis@6465 | 2783 | assert(thread == Thread::current(), "thread consistency check"); |
simonis@6465 | 2784 | |
simonis@6465 | 2785 | // Prevent nasty overflow in deadline calculation |
simonis@6465 | 2786 | // by handling long sleeps similar to solaris or windows. |
simonis@6465 | 2787 | const jlong limit = INT_MAX; |
simonis@6465 | 2788 | int result; |
simonis@6465 | 2789 | while (millis > limit) { |
simonis@6465 | 2790 | if ((result = os::sleep(thread, limit, interruptible)) != OS_OK) { |
simonis@6465 | 2791 | return result; |
simonis@6465 | 2792 | } |
simonis@6465 | 2793 | millis -= limit; |
simonis@6465 | 2794 | } |
simonis@6465 | 2795 | |
simonis@6465 | 2796 | ParkEvent * const slp = thread->_SleepEvent; |
simonis@6465 | 2797 | slp->reset(); |
simonis@6465 | 2798 | OrderAccess::fence(); |
simonis@6465 | 2799 | |
simonis@6465 | 2800 | if (interruptible) { |
simonis@6465 | 2801 | jlong prevtime = javaTimeNanos(); |
simonis@6465 | 2802 | |
simonis@6465 | 2803 | // Prevent precision loss and too long sleeps |
simonis@6465 | 2804 | jlong deadline = prevtime + millis * NANOSECS_PER_MILLISEC; |
simonis@6465 | 2805 | |
simonis@6465 | 2806 | for (;;) { |
simonis@6465 | 2807 | if (os::is_interrupted(thread, true)) { |
simonis@6465 | 2808 | return OS_INTRPT; |
simonis@6465 | 2809 | } |
simonis@6465 | 2810 | |
simonis@6465 | 2811 | jlong newtime = javaTimeNanos(); |
simonis@6465 | 2812 | |
simonis@6465 | 2813 | assert(newtime >= prevtime, "time moving backwards"); |
simonis@6465 | 2814 | // Doing prevtime and newtime in microseconds doesn't help precision, |
simonis@6465 | 2815 | // and trying to round up to avoid lost milliseconds can result in a |
simonis@6465 | 2816 | // too-short delay. |
simonis@6465 | 2817 | millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC; |
simonis@6465 | 2818 | |
simonis@6465 | 2819 | if (millis <= 0) { |
simonis@6465 | 2820 | return OS_OK; |
simonis@6465 | 2821 | } |
simonis@6465 | 2822 | |
simonis@6465 | 2823 | // Stop sleeping if we passed the deadline |
simonis@6465 | 2824 | if (newtime >= deadline) { |
simonis@6465 | 2825 | return OS_OK; |
simonis@6465 | 2826 | } |
simonis@6465 | 2827 | |
simonis@6465 | 2828 | prevtime = newtime; |
simonis@6465 | 2829 | |
simonis@6465 | 2830 | { |
simonis@6465 | 2831 | assert(thread->is_Java_thread(), "sanity check"); |
simonis@6465 | 2832 | JavaThread *jt = (JavaThread *) thread; |
simonis@6465 | 2833 | ThreadBlockInVM tbivm(jt); |
simonis@6465 | 2834 | OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); |
simonis@6465 | 2835 | |
simonis@6465 | 2836 | jt->set_suspend_equivalent(); |
simonis@6465 | 2837 | |
simonis@6465 | 2838 | slp->park(millis); |
simonis@6465 | 2839 | |
simonis@6465 | 2840 | // were we externally suspended while we were waiting? |
simonis@6465 | 2841 | jt->check_and_wait_while_suspended(); |
simonis@6465 | 2842 | } |
simonis@6465 | 2843 | } |
simonis@6465 | 2844 | } else { |
simonis@6465 | 2845 | OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); |
simonis@6465 | 2846 | jlong prevtime = javaTimeNanos(); |
simonis@6465 | 2847 | |
simonis@6465 | 2848 | // Prevent precision loss and too long sleeps |
simonis@6465 | 2849 | jlong deadline = prevtime + millis * NANOSECS_PER_MILLISEC; |
simonis@6465 | 2850 | |
simonis@6465 | 2851 | for (;;) { |
simonis@6465 | 2852 | // It'd be nice to avoid the back-to-back javaTimeNanos() calls on |
simonis@6465 | 2853 | // the 1st iteration ... |
simonis@6465 | 2854 | jlong newtime = javaTimeNanos(); |
simonis@6465 | 2855 | |
simonis@6465 | 2856 | if (newtime - prevtime < 0) { |
simonis@6465 | 2857 | // time moving backwards, should only happen if no monotonic clock |
simonis@6465 | 2858 | // not a guarantee() because JVM should not abort on kernel/glibc bugs |
simonis@6465 | 2859 | // - HS14 Commented out as not implemented. |
simonis@6465 | 2860 | // - TODO Maybe we should implement it? |
simonis@6465 | 2861 | //assert(!Aix::supports_monotonic_clock(), "time moving backwards"); |
simonis@6465 | 2862 | } else { |
simonis@6465 | 2863 | millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC; |
simonis@6465 | 2864 | } |
simonis@6465 | 2865 | |
simonis@6465 | 2866 | if (millis <= 0) break; |
simonis@6465 | 2867 | |
simonis@6465 | 2868 | if (newtime >= deadline) { |
simonis@6465 | 2869 | break; |
simonis@6465 | 2870 | } |
simonis@6465 | 2871 | |
simonis@6465 | 2872 | prevtime = newtime; |
simonis@6465 | 2873 | slp->park(millis); |
simonis@6465 | 2874 | } |
simonis@6465 | 2875 | return OS_OK; |
simonis@6465 | 2876 | } |
simonis@6465 | 2877 | } |
simonis@6465 | 2878 | |
goetz@6519 | 2879 | void os::naked_short_sleep(jlong ms) { |
goetz@6519 | 2880 | struct timespec req; |
goetz@6519 | 2881 | |
goetz@6519 | 2882 | assert(ms < 1000, "Un-interruptable sleep, short time use only"); |
goetz@6519 | 2883 | req.tv_sec = 0; |
goetz@6519 | 2884 | if (ms > 0) { |
goetz@6519 | 2885 | req.tv_nsec = (ms % 1000) * 1000000; |
goetz@6519 | 2886 | } |
goetz@6519 | 2887 | else { |
goetz@6519 | 2888 | req.tv_nsec = 1; |
goetz@6519 | 2889 | } |
goetz@6519 | 2890 | |
goetz@6519 | 2891 | nanosleep(&req, NULL); |
goetz@6519 | 2892 | |
goetz@6519 | 2893 | return; |
simonis@6465 | 2894 | } |
simonis@6465 | 2895 | |
simonis@6465 | 2896 | // Sleep forever; naked call to OS-specific sleep; use with CAUTION |
simonis@6465 | 2897 | void os::infinite_sleep() { |
simonis@6465 | 2898 | while (true) { // sleep forever ... |
simonis@6465 | 2899 | ::sleep(100); // ... 100 seconds at a time |
simonis@6465 | 2900 | } |
simonis@6465 | 2901 | } |
simonis@6465 | 2902 | |
simonis@6465 | 2903 | // Used to convert frequent JVM_Yield() to nops |
simonis@6465 | 2904 | bool os::dont_yield() { |
simonis@6465 | 2905 | return DontYieldALot; |
simonis@6465 | 2906 | } |
simonis@6465 | 2907 | |
simonis@6465 | 2908 | void os::yield() { |
simonis@6465 | 2909 | sched_yield(); |
simonis@6465 | 2910 | } |
simonis@6465 | 2911 | |
simonis@6465 | 2912 | os::YieldResult os::NakedYield() { sched_yield(); return os::YIELD_UNKNOWN; } |
simonis@6465 | 2913 | |
simonis@6465 | 2914 | void os::yield_all(int attempts) { |
simonis@6465 | 2915 | // Yields to all threads, including threads with lower priorities |
simonis@6465 | 2916 | // Threads on Linux are all with same priority. The Solaris style |
simonis@6465 | 2917 | // os::yield_all() with nanosleep(1ms) is not necessary. |
simonis@6465 | 2918 | sched_yield(); |
simonis@6465 | 2919 | } |
simonis@6465 | 2920 | |
simonis@6465 | 2921 | // Called from the tight loops to possibly influence time-sharing heuristics |
simonis@6465 | 2922 | void os::loop_breaker(int attempts) { |
simonis@6465 | 2923 | os::yield_all(attempts); |
simonis@6465 | 2924 | } |
simonis@6465 | 2925 | |
simonis@6465 | 2926 | //////////////////////////////////////////////////////////////////////////////// |
simonis@6465 | 2927 | // thread priority support |
simonis@6465 | 2928 | |
simonis@6465 | 2929 | // From AIX manpage to pthread_setschedparam |
simonis@6465 | 2930 | // (see: http://publib.boulder.ibm.com/infocenter/pseries/v5r3/index.jsp? |
simonis@6465 | 2931 | // topic=/com.ibm.aix.basetechref/doc/basetrf1/pthread_setschedparam.htm): |
simonis@6465 | 2932 | // |
simonis@6465 | 2933 | // "If schedpolicy is SCHED_OTHER, then sched_priority must be in the |
simonis@6465 | 2934 | // range from 40 to 80, where 40 is the least favored priority and 80 |
simonis@6465 | 2935 | // is the most favored." |
simonis@6465 | 2936 | // |
simonis@6465 | 2937 | // (Actually, I doubt this even has an impact on AIX, as we do kernel |
simonis@6465 | 2938 | // scheduling there; however, this still leaves iSeries.) |
simonis@6465 | 2939 | // |
simonis@6465 | 2940 | // We use the same values for AIX and PASE. |
simonis@6465 | 2941 | int os::java_to_os_priority[CriticalPriority + 1] = { |
simonis@6465 | 2942 | 54, // 0 Entry should never be used |
simonis@6465 | 2943 | |
simonis@6465 | 2944 | 55, // 1 MinPriority |
simonis@6465 | 2945 | 55, // 2 |
simonis@6465 | 2946 | 56, // 3 |
simonis@6465 | 2947 | |
simonis@6465 | 2948 | 56, // 4 |
simonis@6465 | 2949 | 57, // 5 NormPriority |
simonis@6465 | 2950 | 57, // 6 |
simonis@6465 | 2951 | |
simonis@6465 | 2952 | 58, // 7 |
simonis@6465 | 2953 | 58, // 8 |
simonis@6465 | 2954 | 59, // 9 NearMaxPriority |
simonis@6465 | 2955 | |
simonis@6465 | 2956 | 60, // 10 MaxPriority |
simonis@6465 | 2957 | |
simonis@6465 | 2958 | 60 // 11 CriticalPriority |
simonis@6465 | 2959 | }; |
simonis@6465 | 2960 | |
simonis@6465 | 2961 | OSReturn os::set_native_priority(Thread* thread, int newpri) { |
simonis@6465 | 2962 | if (!UseThreadPriorities) return OS_OK; |
simonis@6465 | 2963 | pthread_t thr = thread->osthread()->pthread_id(); |
simonis@6465 | 2964 | int policy = SCHED_OTHER; |
simonis@6465 | 2965 | struct sched_param param; |
simonis@6465 | 2966 | param.sched_priority = newpri; |
simonis@6465 | 2967 | int ret = pthread_setschedparam(thr, policy, ¶m); |
simonis@6465 | 2968 | |
simonis@6465 | 2969 | if (Verbose) { |
simonis@6465 | 2970 | if (ret == 0) { |
simonis@6465 | 2971 | fprintf(stderr, "changed priority of thread %d to %d\n", (int)thr, newpri); |
simonis@6465 | 2972 | } else { |
simonis@6465 | 2973 | fprintf(stderr, "Could not changed priority for thread %d to %d (error %d, %s)\n", |
simonis@6465 | 2974 | (int)thr, newpri, ret, strerror(ret)); |
simonis@6465 | 2975 | } |
simonis@6465 | 2976 | } |
simonis@6465 | 2977 | return (ret == 0) ? OS_OK : OS_ERR; |
simonis@6465 | 2978 | } |
simonis@6465 | 2979 | |
simonis@6465 | 2980 | OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { |
simonis@6465 | 2981 | if (!UseThreadPriorities) { |
simonis@6465 | 2982 | *priority_ptr = java_to_os_priority[NormPriority]; |
simonis@6465 | 2983 | return OS_OK; |
simonis@6465 | 2984 | } |
simonis@6465 | 2985 | pthread_t thr = thread->osthread()->pthread_id(); |
simonis@6465 | 2986 | int policy = SCHED_OTHER; |
simonis@6465 | 2987 | struct sched_param param; |
simonis@6465 | 2988 | int ret = pthread_getschedparam(thr, &policy, ¶m); |
simonis@6465 | 2989 | *priority_ptr = param.sched_priority; |
simonis@6465 | 2990 | |
simonis@6465 | 2991 | return (ret == 0) ? OS_OK : OS_ERR; |
simonis@6465 | 2992 | } |
simonis@6465 | 2993 | |
simonis@6465 | 2994 | // Hint to the underlying OS that a task switch would not be good. |
simonis@6465 | 2995 | // Void return because it's a hint and can fail. |
simonis@6465 | 2996 | void os::hint_no_preempt() {} |
simonis@6465 | 2997 | |
simonis@6465 | 2998 | //////////////////////////////////////////////////////////////////////////////// |
simonis@6465 | 2999 | // suspend/resume support |
simonis@6465 | 3000 | |
simonis@6465 | 3001 | // the low-level signal-based suspend/resume support is a remnant from the |
simonis@6465 | 3002 | // old VM-suspension that used to be for java-suspension, safepoints etc, |
simonis@6465 | 3003 | // within hotspot. Now there is a single use-case for this: |
simonis@6465 | 3004 | // - calling get_thread_pc() on the VMThread by the flat-profiler task |
simonis@6465 | 3005 | // that runs in the watcher thread. |
simonis@6465 | 3006 | // The remaining code is greatly simplified from the more general suspension |
simonis@6465 | 3007 | // code that used to be used. |
simonis@6465 | 3008 | // |
simonis@6465 | 3009 | // The protocol is quite simple: |
simonis@6465 | 3010 | // - suspend: |
simonis@6465 | 3011 | // - sends a signal to the target thread |
simonis@6465 | 3012 | // - polls the suspend state of the osthread using a yield loop |
simonis@6465 | 3013 | // - target thread signal handler (SR_handler) sets suspend state |
simonis@6465 | 3014 | // and blocks in sigsuspend until continued |
simonis@6465 | 3015 | // - resume: |
simonis@6465 | 3016 | // - sets target osthread state to continue |
simonis@6465 | 3017 | // - sends signal to end the sigsuspend loop in the SR_handler |
simonis@6465 | 3018 | // |
simonis@6465 | 3019 | // Note that the SR_lock plays no role in this suspend/resume protocol. |
simonis@6465 | 3020 | // |
simonis@6465 | 3021 | |
simonis@6465 | 3022 | static void resume_clear_context(OSThread *osthread) { |
simonis@6465 | 3023 | osthread->set_ucontext(NULL); |
simonis@6465 | 3024 | osthread->set_siginfo(NULL); |
simonis@6465 | 3025 | } |
simonis@6465 | 3026 | |
simonis@6465 | 3027 | static void suspend_save_context(OSThread *osthread, siginfo_t* siginfo, ucontext_t* context) { |
simonis@6465 | 3028 | osthread->set_ucontext(context); |
simonis@6465 | 3029 | osthread->set_siginfo(siginfo); |
simonis@6465 | 3030 | } |
simonis@6465 | 3031 | |
simonis@6465 | 3032 | // |
simonis@6465 | 3033 | // Handler function invoked when a thread's execution is suspended or |
simonis@6465 | 3034 | // resumed. We have to be careful that only async-safe functions are |
simonis@6465 | 3035 | // called here (Note: most pthread functions are not async safe and |
simonis@6465 | 3036 | // should be avoided.) |
simonis@6465 | 3037 | // |
simonis@6465 | 3038 | // Note: sigwait() is a more natural fit than sigsuspend() from an |
simonis@6465 | 3039 | // interface point of view, but sigwait() prevents the signal hander |
simonis@6465 | 3040 | // from being run. libpthread would get very confused by not having |
simonis@6465 | 3041 | // its signal handlers run and prevents sigwait()'s use with the |
simonis@6465 | 3042 | // mutex granting granting signal. |
simonis@6465 | 3043 | // |
simonis@6465 | 3044 | // Currently only ever called on the VMThread and JavaThreads (PC sampling). |
simonis@6465 | 3045 | // |
simonis@6465 | 3046 | static void SR_handler(int sig, siginfo_t* siginfo, ucontext_t* context) { |
simonis@6465 | 3047 | // Save and restore errno to avoid confusing native code with EINTR |
simonis@6465 | 3048 | // after sigsuspend. |
simonis@6465 | 3049 | int old_errno = errno; |
simonis@6465 | 3050 | |
simonis@6465 | 3051 | Thread* thread = Thread::current(); |
simonis@6465 | 3052 | OSThread* osthread = thread->osthread(); |
simonis@6465 | 3053 | assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread"); |
simonis@6465 | 3054 | |
simonis@6465 | 3055 | os::SuspendResume::State current = osthread->sr.state(); |
simonis@6465 | 3056 | if (current == os::SuspendResume::SR_SUSPEND_REQUEST) { |
simonis@6465 | 3057 | suspend_save_context(osthread, siginfo, context); |
simonis@6465 | 3058 | |
simonis@6465 | 3059 | // attempt to switch the state, we assume we had a SUSPEND_REQUEST |
simonis@6465 | 3060 | os::SuspendResume::State state = osthread->sr.suspended(); |
simonis@6465 | 3061 | if (state == os::SuspendResume::SR_SUSPENDED) { |
simonis@6465 | 3062 | sigset_t suspend_set; // signals for sigsuspend() |
simonis@6465 | 3063 | |
simonis@6465 | 3064 | // get current set of blocked signals and unblock resume signal |
simonis@6465 | 3065 | pthread_sigmask(SIG_BLOCK, NULL, &suspend_set); |
simonis@6465 | 3066 | sigdelset(&suspend_set, SR_signum); |
simonis@6465 | 3067 | |
simonis@6465 | 3068 | // wait here until we are resumed |
simonis@6465 | 3069 | while (1) { |
simonis@6465 | 3070 | sigsuspend(&suspend_set); |
simonis@6465 | 3071 | |
simonis@6465 | 3072 | os::SuspendResume::State result = osthread->sr.running(); |
simonis@6465 | 3073 | if (result == os::SuspendResume::SR_RUNNING) { |
simonis@6465 | 3074 | break; |
simonis@6465 | 3075 | } |
simonis@6465 | 3076 | } |
simonis@6465 | 3077 | |
simonis@6465 | 3078 | } else if (state == os::SuspendResume::SR_RUNNING) { |
simonis@6465 | 3079 | // request was cancelled, continue |
simonis@6465 | 3080 | } else { |
simonis@6465 | 3081 | ShouldNotReachHere(); |
simonis@6465 | 3082 | } |
simonis@6465 | 3083 | |
simonis@6465 | 3084 | resume_clear_context(osthread); |
simonis@6465 | 3085 | } else if (current == os::SuspendResume::SR_RUNNING) { |
simonis@6465 | 3086 | // request was cancelled, continue |
simonis@6465 | 3087 | } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) { |
simonis@6465 | 3088 | // ignore |
simonis@6465 | 3089 | } else { |
simonis@6465 | 3090 | ShouldNotReachHere(); |
simonis@6465 | 3091 | } |
simonis@6465 | 3092 | |
simonis@6465 | 3093 | errno = old_errno; |
simonis@6465 | 3094 | } |
simonis@6465 | 3095 | |
simonis@6465 | 3096 | |
simonis@6465 | 3097 | static int SR_initialize() { |
simonis@6465 | 3098 | struct sigaction act; |
simonis@6465 | 3099 | char *s; |
simonis@6465 | 3100 | // Get signal number to use for suspend/resume |
simonis@6465 | 3101 | if ((s = ::getenv("_JAVA_SR_SIGNUM")) != 0) { |
simonis@6465 | 3102 | int sig = ::strtol(s, 0, 10); |
simonis@6465 | 3103 | if (sig > 0 || sig < NSIG) { |
simonis@6465 | 3104 | SR_signum = sig; |
simonis@6465 | 3105 | } |
simonis@6465 | 3106 | } |
simonis@6465 | 3107 | |
simonis@6465 | 3108 | assert(SR_signum > SIGSEGV && SR_signum > SIGBUS, |
simonis@6465 | 3109 | "SR_signum must be greater than max(SIGSEGV, SIGBUS), see 4355769"); |
simonis@6465 | 3110 | |
simonis@6465 | 3111 | sigemptyset(&SR_sigset); |
simonis@6465 | 3112 | sigaddset(&SR_sigset, SR_signum); |
simonis@6465 | 3113 | |
simonis@6465 | 3114 | // Set up signal handler for suspend/resume. |
simonis@6465 | 3115 | act.sa_flags = SA_RESTART|SA_SIGINFO; |
simonis@6465 | 3116 | act.sa_handler = (void (*)(int)) SR_handler; |
simonis@6465 | 3117 | |
simonis@6465 | 3118 | // SR_signum is blocked by default. |
simonis@6465 | 3119 | // 4528190 - We also need to block pthread restart signal (32 on all |
simonis@6465 | 3120 | // supported Linux platforms). Note that LinuxThreads need to block |
simonis@6465 | 3121 | // this signal for all threads to work properly. So we don't have |
simonis@6465 | 3122 | // to use hard-coded signal number when setting up the mask. |
simonis@6465 | 3123 | pthread_sigmask(SIG_BLOCK, NULL, &act.sa_mask); |
simonis@6465 | 3124 | |
simonis@6465 | 3125 | if (sigaction(SR_signum, &act, 0) == -1) { |
simonis@6465 | 3126 | return -1; |
simonis@6465 | 3127 | } |
simonis@6465 | 3128 | |
simonis@6465 | 3129 | // Save signal flag |
simonis@6465 | 3130 | os::Aix::set_our_sigflags(SR_signum, act.sa_flags); |
simonis@6465 | 3131 | return 0; |
simonis@6465 | 3132 | } |
simonis@6465 | 3133 | |
simonis@6465 | 3134 | static int SR_finalize() { |
simonis@6465 | 3135 | return 0; |
simonis@6465 | 3136 | } |
simonis@6465 | 3137 | |
simonis@6465 | 3138 | static int sr_notify(OSThread* osthread) { |
simonis@6465 | 3139 | int status = pthread_kill(osthread->pthread_id(), SR_signum); |
simonis@6465 | 3140 | assert_status(status == 0, status, "pthread_kill"); |
simonis@6465 | 3141 | return status; |
simonis@6465 | 3142 | } |
simonis@6465 | 3143 | |
simonis@6465 | 3144 | // "Randomly" selected value for how long we want to spin |
simonis@6465 | 3145 | // before bailing out on suspending a thread, also how often |
simonis@6465 | 3146 | // we send a signal to a thread we want to resume |
simonis@6465 | 3147 | static const int RANDOMLY_LARGE_INTEGER = 1000000; |
simonis@6465 | 3148 | static const int RANDOMLY_LARGE_INTEGER2 = 100; |
simonis@6465 | 3149 | |
simonis@6465 | 3150 | // returns true on success and false on error - really an error is fatal |
simonis@6465 | 3151 | // but this seems the normal response to library errors |
simonis@6465 | 3152 | static bool do_suspend(OSThread* osthread) { |
simonis@6465 | 3153 | assert(osthread->sr.is_running(), "thread should be running"); |
simonis@6465 | 3154 | // mark as suspended and send signal |
simonis@6465 | 3155 | |
simonis@6465 | 3156 | if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) { |
simonis@6465 | 3157 | // failed to switch, state wasn't running? |
simonis@6465 | 3158 | ShouldNotReachHere(); |
simonis@6465 | 3159 | return false; |
simonis@6465 | 3160 | } |
simonis@6465 | 3161 | |
simonis@6465 | 3162 | if (sr_notify(osthread) != 0) { |
simonis@6465 | 3163 | // try to cancel, switch to running |
simonis@6465 | 3164 | |
simonis@6465 | 3165 | os::SuspendResume::State result = osthread->sr.cancel_suspend(); |
simonis@6465 | 3166 | if (result == os::SuspendResume::SR_RUNNING) { |
simonis@6465 | 3167 | // cancelled |
simonis@6465 | 3168 | return false; |
simonis@6465 | 3169 | } else if (result == os::SuspendResume::SR_SUSPENDED) { |
simonis@6465 | 3170 | // somehow managed to suspend |
simonis@6465 | 3171 | return true; |
simonis@6465 | 3172 | } else { |
simonis@6465 | 3173 | ShouldNotReachHere(); |
simonis@6465 | 3174 | return false; |
simonis@6465 | 3175 | } |
simonis@6465 | 3176 | } |
simonis@6465 | 3177 | |
simonis@6465 | 3178 | // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED |
simonis@6465 | 3179 | |
simonis@6465 | 3180 | for (int n = 0; !osthread->sr.is_suspended(); n++) { |
simonis@6465 | 3181 | for (int i = 0; i < RANDOMLY_LARGE_INTEGER2 && !osthread->sr.is_suspended(); i++) { |
simonis@6465 | 3182 | os::yield_all(i); |
simonis@6465 | 3183 | } |
simonis@6465 | 3184 | |
simonis@6465 | 3185 | // timeout, try to cancel the request |
simonis@6465 | 3186 | if (n >= RANDOMLY_LARGE_INTEGER) { |
simonis@6465 | 3187 | os::SuspendResume::State cancelled = osthread->sr.cancel_suspend(); |
simonis@6465 | 3188 | if (cancelled == os::SuspendResume::SR_RUNNING) { |
simonis@6465 | 3189 | return false; |
simonis@6465 | 3190 | } else if (cancelled == os::SuspendResume::SR_SUSPENDED) { |
simonis@6465 | 3191 | return true; |
simonis@6465 | 3192 | } else { |
simonis@6465 | 3193 | ShouldNotReachHere(); |
simonis@6465 | 3194 | return false; |
simonis@6465 | 3195 | } |
simonis@6465 | 3196 | } |
simonis@6465 | 3197 | } |
simonis@6465 | 3198 | |
simonis@6465 | 3199 | guarantee(osthread->sr.is_suspended(), "Must be suspended"); |
simonis@6465 | 3200 | return true; |
simonis@6465 | 3201 | } |
simonis@6465 | 3202 | |
simonis@6465 | 3203 | static void do_resume(OSThread* osthread) { |
simonis@6465 | 3204 | //assert(osthread->sr.is_suspended(), "thread should be suspended"); |
simonis@6465 | 3205 | |
simonis@6465 | 3206 | if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) { |
simonis@6465 | 3207 | // failed to switch to WAKEUP_REQUEST |
simonis@6465 | 3208 | ShouldNotReachHere(); |
simonis@6465 | 3209 | return; |
simonis@6465 | 3210 | } |
simonis@6465 | 3211 | |
simonis@6465 | 3212 | while (!osthread->sr.is_running()) { |
simonis@6465 | 3213 | if (sr_notify(osthread) == 0) { |
simonis@6465 | 3214 | for (int n = 0; n < RANDOMLY_LARGE_INTEGER && !osthread->sr.is_running(); n++) { |
simonis@6465 | 3215 | for (int i = 0; i < 100 && !osthread->sr.is_running(); i++) { |
simonis@6465 | 3216 | os::yield_all(i); |
simonis@6465 | 3217 | } |
simonis@6465 | 3218 | } |
simonis@6465 | 3219 | } else { |
simonis@6465 | 3220 | ShouldNotReachHere(); |
simonis@6465 | 3221 | } |
simonis@6465 | 3222 | } |
simonis@6465 | 3223 | |
simonis@6465 | 3224 | guarantee(osthread->sr.is_running(), "Must be running!"); |
simonis@6465 | 3225 | } |
simonis@6465 | 3226 | |
simonis@6465 | 3227 | //////////////////////////////////////////////////////////////////////////////// |
simonis@6465 | 3228 | // interrupt support |
simonis@6465 | 3229 | |
simonis@6465 | 3230 | void os::interrupt(Thread* thread) { |
simonis@6465 | 3231 | assert(Thread::current() == thread || Threads_lock->owned_by_self(), |
simonis@6465 | 3232 | "possibility of dangling Thread pointer"); |
simonis@6465 | 3233 | |
simonis@6465 | 3234 | OSThread* osthread = thread->osthread(); |
simonis@6465 | 3235 | |
simonis@6465 | 3236 | if (!osthread->interrupted()) { |
simonis@6465 | 3237 | osthread->set_interrupted(true); |
simonis@6465 | 3238 | // More than one thread can get here with the same value of osthread, |
simonis@6465 | 3239 | // resulting in multiple notifications. We do, however, want the store |
simonis@6465 | 3240 | // to interrupted() to be visible to other threads before we execute unpark(). |
simonis@6465 | 3241 | OrderAccess::fence(); |
simonis@6465 | 3242 | ParkEvent * const slp = thread->_SleepEvent; |
simonis@6465 | 3243 | if (slp != NULL) slp->unpark(); |
simonis@6465 | 3244 | } |
simonis@6465 | 3245 | |
simonis@6465 | 3246 | // For JSR166. Unpark even if interrupt status already was set |
simonis@6465 | 3247 | if (thread->is_Java_thread()) |
simonis@6465 | 3248 | ((JavaThread*)thread)->parker()->unpark(); |
simonis@6465 | 3249 | |
simonis@6465 | 3250 | ParkEvent * ev = thread->_ParkEvent; |
simonis@6465 | 3251 | if (ev != NULL) ev->unpark(); |
simonis@6465 | 3252 | |
simonis@6465 | 3253 | } |
simonis@6465 | 3254 | |
simonis@6465 | 3255 | bool os::is_interrupted(Thread* thread, bool clear_interrupted) { |
simonis@6465 | 3256 | assert(Thread::current() == thread || Threads_lock->owned_by_self(), |
simonis@6465 | 3257 | "possibility of dangling Thread pointer"); |
simonis@6465 | 3258 | |
simonis@6465 | 3259 | OSThread* osthread = thread->osthread(); |
simonis@6465 | 3260 | |
simonis@6465 | 3261 | bool interrupted = osthread->interrupted(); |
simonis@6465 | 3262 | |
simonis@6465 | 3263 | if (interrupted && clear_interrupted) { |
simonis@6465 | 3264 | osthread->set_interrupted(false); |
simonis@6465 | 3265 | // consider thread->_SleepEvent->reset() ... optional optimization |
simonis@6465 | 3266 | } |
simonis@6465 | 3267 | |
simonis@6465 | 3268 | return interrupted; |
simonis@6465 | 3269 | } |
simonis@6465 | 3270 | |
simonis@6465 | 3271 | /////////////////////////////////////////////////////////////////////////////////// |
simonis@6465 | 3272 | // signal handling (except suspend/resume) |
simonis@6465 | 3273 | |
simonis@6465 | 3274 | // This routine may be used by user applications as a "hook" to catch signals. |
simonis@6465 | 3275 | // The user-defined signal handler must pass unrecognized signals to this |
simonis@6465 | 3276 | // routine, and if it returns true (non-zero), then the signal handler must |
simonis@6465 | 3277 | // return immediately. If the flag "abort_if_unrecognized" is true, then this |
simonis@6465 | 3278 | // routine will never retun false (zero), but instead will execute a VM panic |
simonis@6465 | 3279 | // routine kill the process. |
simonis@6465 | 3280 | // |
simonis@6465 | 3281 | // If this routine returns false, it is OK to call it again. This allows |
simonis@6465 | 3282 | // the user-defined signal handler to perform checks either before or after |
simonis@6465 | 3283 | // the VM performs its own checks. Naturally, the user code would be making |
simonis@6465 | 3284 | // a serious error if it tried to handle an exception (such as a null check |
simonis@6465 | 3285 | // or breakpoint) that the VM was generating for its own correct operation. |
simonis@6465 | 3286 | // |
simonis@6465 | 3287 | // This routine may recognize any of the following kinds of signals: |
simonis@6465 | 3288 | // SIGBUS, SIGSEGV, SIGILL, SIGFPE, SIGQUIT, SIGPIPE, SIGXFSZ, SIGUSR1. |
simonis@6465 | 3289 | // It should be consulted by handlers for any of those signals. |
simonis@6465 | 3290 | // |
simonis@6465 | 3291 | // The caller of this routine must pass in the three arguments supplied |
simonis@6465 | 3292 | // to the function referred to in the "sa_sigaction" (not the "sa_handler") |
simonis@6465 | 3293 | // field of the structure passed to sigaction(). This routine assumes that |
simonis@6465 | 3294 | // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. |
simonis@6465 | 3295 | // |
simonis@6465 | 3296 | // Note that the VM will print warnings if it detects conflicting signal |
simonis@6465 | 3297 | // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". |
simonis@6465 | 3298 | // |
simonis@6465 | 3299 | extern "C" JNIEXPORT int |
simonis@6465 | 3300 | JVM_handle_aix_signal(int signo, siginfo_t* siginfo, void* ucontext, int abort_if_unrecognized); |
simonis@6465 | 3301 | |
simonis@6465 | 3302 | // Set thread signal mask (for some reason on AIX sigthreadmask() seems |
simonis@6465 | 3303 | // to be the thing to call; documentation is not terribly clear about whether |
simonis@6465 | 3304 | // pthread_sigmask also works, and if it does, whether it does the same. |
simonis@6465 | 3305 | bool set_thread_signal_mask(int how, const sigset_t* set, sigset_t* oset) { |
simonis@6465 | 3306 | const int rc = ::pthread_sigmask(how, set, oset); |
simonis@6465 | 3307 | // return value semantics differ slightly for error case: |
simonis@6465 | 3308 | // pthread_sigmask returns error number, sigthreadmask -1 and sets global errno |
simonis@6465 | 3309 | // (so, pthread_sigmask is more theadsafe for error handling) |
simonis@6465 | 3310 | // But success is always 0. |
simonis@6465 | 3311 | return rc == 0 ? true : false; |
simonis@6465 | 3312 | } |
simonis@6465 | 3313 | |
simonis@6465 | 3314 | // Function to unblock all signals which are, according |
simonis@6465 | 3315 | // to POSIX, typical program error signals. If they happen while being blocked, |
simonis@6465 | 3316 | // they typically will bring down the process immediately. |
simonis@6465 | 3317 | bool unblock_program_error_signals() { |
simonis@6465 | 3318 | sigset_t set; |
simonis@6465 | 3319 | ::sigemptyset(&set); |
simonis@6465 | 3320 | ::sigaddset(&set, SIGILL); |
simonis@6465 | 3321 | ::sigaddset(&set, SIGBUS); |
simonis@6465 | 3322 | ::sigaddset(&set, SIGFPE); |
simonis@6465 | 3323 | ::sigaddset(&set, SIGSEGV); |
simonis@6465 | 3324 | return set_thread_signal_mask(SIG_UNBLOCK, &set, NULL); |
simonis@6465 | 3325 | } |
simonis@6465 | 3326 | |
simonis@6465 | 3327 | // Renamed from 'signalHandler' to avoid collision with other shared libs. |
simonis@6465 | 3328 | void javaSignalHandler(int sig, siginfo_t* info, void* uc) { |
simonis@6465 | 3329 | assert(info != NULL && uc != NULL, "it must be old kernel"); |
simonis@6465 | 3330 | |
simonis@6465 | 3331 | // Never leave program error signals blocked; |
simonis@6465 | 3332 | // on all our platforms they would bring down the process immediately when |
simonis@6465 | 3333 | // getting raised while being blocked. |
simonis@6465 | 3334 | unblock_program_error_signals(); |
simonis@6465 | 3335 | |
simonis@6465 | 3336 | JVM_handle_aix_signal(sig, info, uc, true); |
simonis@6465 | 3337 | } |
simonis@6465 | 3338 | |
simonis@6465 | 3339 | |
simonis@6465 | 3340 | // This boolean allows users to forward their own non-matching signals |
simonis@6465 | 3341 | // to JVM_handle_aix_signal, harmlessly. |
simonis@6465 | 3342 | bool os::Aix::signal_handlers_are_installed = false; |
simonis@6465 | 3343 | |
simonis@6465 | 3344 | // For signal-chaining |
simonis@6465 | 3345 | struct sigaction os::Aix::sigact[MAXSIGNUM]; |
simonis@6465 | 3346 | unsigned int os::Aix::sigs = 0; |
simonis@6465 | 3347 | bool os::Aix::libjsig_is_loaded = false; |
simonis@6465 | 3348 | typedef struct sigaction *(*get_signal_t)(int); |
simonis@6465 | 3349 | get_signal_t os::Aix::get_signal_action = NULL; |
simonis@6465 | 3350 | |
simonis@6465 | 3351 | struct sigaction* os::Aix::get_chained_signal_action(int sig) { |
simonis@6465 | 3352 | struct sigaction *actp = NULL; |
simonis@6465 | 3353 | |
simonis@6465 | 3354 | if (libjsig_is_loaded) { |
simonis@6465 | 3355 | // Retrieve the old signal handler from libjsig |
simonis@6465 | 3356 | actp = (*get_signal_action)(sig); |
simonis@6465 | 3357 | } |
simonis@6465 | 3358 | if (actp == NULL) { |
simonis@6465 | 3359 | // Retrieve the preinstalled signal handler from jvm |
simonis@6465 | 3360 | actp = get_preinstalled_handler(sig); |
simonis@6465 | 3361 | } |
simonis@6465 | 3362 | |
simonis@6465 | 3363 | return actp; |
simonis@6465 | 3364 | } |
simonis@6465 | 3365 | |
simonis@6465 | 3366 | static bool call_chained_handler(struct sigaction *actp, int sig, |
simonis@6465 | 3367 | siginfo_t *siginfo, void *context) { |
goetz@6501 | 3368 | // Call the old signal handler |
goetz@6501 | 3369 | if (actp->sa_handler == SIG_DFL) { |
goetz@6501 | 3370 | // It's more reasonable to let jvm treat it as an unexpected exception |
goetz@6501 | 3371 | // instead of taking the default action. |
goetz@6501 | 3372 | return false; |
goetz@6501 | 3373 | } else if (actp->sa_handler != SIG_IGN) { |
goetz@6501 | 3374 | if ((actp->sa_flags & SA_NODEFER) == 0) { |
goetz@6501 | 3375 | // automaticlly block the signal |
goetz@6501 | 3376 | sigaddset(&(actp->sa_mask), sig); |
goetz@6501 | 3377 | } |
goetz@6501 | 3378 | |
goetz@6501 | 3379 | sa_handler_t hand = NULL; |
goetz@6501 | 3380 | sa_sigaction_t sa = NULL; |
goetz@6501 | 3381 | bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; |
goetz@6501 | 3382 | // retrieve the chained handler |
goetz@6501 | 3383 | if (siginfo_flag_set) { |
goetz@6501 | 3384 | sa = actp->sa_sigaction; |
goetz@6501 | 3385 | } else { |
goetz@6501 | 3386 | hand = actp->sa_handler; |
goetz@6501 | 3387 | } |
goetz@6501 | 3388 | |
goetz@6501 | 3389 | if ((actp->sa_flags & SA_RESETHAND) != 0) { |
goetz@6501 | 3390 | actp->sa_handler = SIG_DFL; |
goetz@6501 | 3391 | } |
goetz@6501 | 3392 | |
goetz@6501 | 3393 | // try to honor the signal mask |
goetz@6501 | 3394 | sigset_t oset; |
goetz@6501 | 3395 | pthread_sigmask(SIG_SETMASK, &(actp->sa_mask), &oset); |
goetz@6501 | 3396 | |
goetz@6501 | 3397 | // call into the chained handler |
goetz@6501 | 3398 | if (siginfo_flag_set) { |
goetz@6501 | 3399 | (*sa)(sig, siginfo, context); |
goetz@6501 | 3400 | } else { |
goetz@6501 | 3401 | (*hand)(sig); |
goetz@6501 | 3402 | } |
goetz@6501 | 3403 | |
goetz@6501 | 3404 | // restore the signal mask |
goetz@6501 | 3405 | pthread_sigmask(SIG_SETMASK, &oset, 0); |
goetz@6501 | 3406 | } |
goetz@6501 | 3407 | // Tell jvm's signal handler the signal is taken care of. |
simonis@6465 | 3408 | return true; |
simonis@6465 | 3409 | } |
simonis@6465 | 3410 | |
simonis@6465 | 3411 | bool os::Aix::chained_handler(int sig, siginfo_t* siginfo, void* context) { |
simonis@6465 | 3412 | bool chained = false; |
simonis@6465 | 3413 | // signal-chaining |
simonis@6465 | 3414 | if (UseSignalChaining) { |
simonis@6465 | 3415 | struct sigaction *actp = get_chained_signal_action(sig); |
simonis@6465 | 3416 | if (actp != NULL) { |
simonis@6465 | 3417 | chained = call_chained_handler(actp, sig, siginfo, context); |
simonis@6465 | 3418 | } |
simonis@6465 | 3419 | } |
simonis@6465 | 3420 | return chained; |
simonis@6465 | 3421 | } |
simonis@6465 | 3422 | |
simonis@6465 | 3423 | struct sigaction* os::Aix::get_preinstalled_handler(int sig) { |
simonis@6465 | 3424 | if ((((unsigned int)1 << sig) & sigs) != 0) { |
simonis@6465 | 3425 | return &sigact[sig]; |
simonis@6465 | 3426 | } |
simonis@6465 | 3427 | return NULL; |
simonis@6465 | 3428 | } |
simonis@6465 | 3429 | |
simonis@6465 | 3430 | void os::Aix::save_preinstalled_handler(int sig, struct sigaction& oldAct) { |
simonis@6465 | 3431 | assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); |
simonis@6465 | 3432 | sigact[sig] = oldAct; |
simonis@6465 | 3433 | sigs |= (unsigned int)1 << sig; |
simonis@6465 | 3434 | } |
simonis@6465 | 3435 | |
simonis@6465 | 3436 | // for diagnostic |
simonis@6465 | 3437 | int os::Aix::sigflags[MAXSIGNUM]; |
simonis@6465 | 3438 | |
simonis@6465 | 3439 | int os::Aix::get_our_sigflags(int sig) { |
simonis@6465 | 3440 | assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); |
simonis@6465 | 3441 | return sigflags[sig]; |
simonis@6465 | 3442 | } |
simonis@6465 | 3443 | |
simonis@6465 | 3444 | void os::Aix::set_our_sigflags(int sig, int flags) { |
simonis@6465 | 3445 | assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); |
simonis@6465 | 3446 | sigflags[sig] = flags; |
simonis@6465 | 3447 | } |
simonis@6465 | 3448 | |
simonis@6465 | 3449 | void os::Aix::set_signal_handler(int sig, bool set_installed) { |
simonis@6465 | 3450 | // Check for overwrite. |
simonis@6465 | 3451 | struct sigaction oldAct; |
simonis@6465 | 3452 | sigaction(sig, (struct sigaction*)NULL, &oldAct); |
simonis@6465 | 3453 | |
simonis@6465 | 3454 | void* oldhand = oldAct.sa_sigaction |
simonis@6465 | 3455 | ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) |
simonis@6465 | 3456 | : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); |
simonis@6465 | 3457 | // Renamed 'signalHandler' to avoid collision with other shared libs. |
simonis@6465 | 3458 | if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && |
simonis@6465 | 3459 | oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && |
simonis@6465 | 3460 | oldhand != CAST_FROM_FN_PTR(void*, (sa_sigaction_t)javaSignalHandler)) { |
simonis@6465 | 3461 | if (AllowUserSignalHandlers || !set_installed) { |
simonis@6465 | 3462 | // Do not overwrite; user takes responsibility to forward to us. |
simonis@6465 | 3463 | return; |
simonis@6465 | 3464 | } else if (UseSignalChaining) { |
simonis@6465 | 3465 | // save the old handler in jvm |
simonis@6465 | 3466 | save_preinstalled_handler(sig, oldAct); |
simonis@6465 | 3467 | // libjsig also interposes the sigaction() call below and saves the |
simonis@6465 | 3468 | // old sigaction on it own. |
simonis@6465 | 3469 | } else { |
simonis@6465 | 3470 | fatal(err_msg("Encountered unexpected pre-existing sigaction handler " |
simonis@6465 | 3471 | "%#lx for signal %d.", (long)oldhand, sig)); |
simonis@6465 | 3472 | } |
simonis@6465 | 3473 | } |
simonis@6465 | 3474 | |
simonis@6465 | 3475 | struct sigaction sigAct; |
simonis@6465 | 3476 | sigfillset(&(sigAct.sa_mask)); |
simonis@6465 | 3477 | if (!set_installed) { |
simonis@6465 | 3478 | sigAct.sa_handler = SIG_DFL; |
simonis@6465 | 3479 | sigAct.sa_flags = SA_RESTART; |
simonis@6465 | 3480 | } else { |
simonis@6465 | 3481 | // Renamed 'signalHandler' to avoid collision with other shared libs. |
simonis@6465 | 3482 | sigAct.sa_sigaction = javaSignalHandler; |
simonis@6465 | 3483 | sigAct.sa_flags = SA_SIGINFO|SA_RESTART; |
simonis@6465 | 3484 | } |
simonis@6465 | 3485 | // Save flags, which are set by ours |
simonis@6465 | 3486 | assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); |
simonis@6465 | 3487 | sigflags[sig] = sigAct.sa_flags; |
simonis@6465 | 3488 | |
simonis@6465 | 3489 | int ret = sigaction(sig, &sigAct, &oldAct); |
simonis@6465 | 3490 | assert(ret == 0, "check"); |
simonis@6465 | 3491 | |
simonis@6465 | 3492 | void* oldhand2 = oldAct.sa_sigaction |
simonis@6465 | 3493 | ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) |
simonis@6465 | 3494 | : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); |
simonis@6465 | 3495 | assert(oldhand2 == oldhand, "no concurrent signal handler installation"); |
simonis@6465 | 3496 | } |
simonis@6465 | 3497 | |
simonis@6465 | 3498 | // install signal handlers for signals that HotSpot needs to |
simonis@6465 | 3499 | // handle in order to support Java-level exception handling. |
simonis@6465 | 3500 | void os::Aix::install_signal_handlers() { |
simonis@6465 | 3501 | if (!signal_handlers_are_installed) { |
simonis@6465 | 3502 | signal_handlers_are_installed = true; |
simonis@6465 | 3503 | |
simonis@6465 | 3504 | // signal-chaining |
simonis@6465 | 3505 | typedef void (*signal_setting_t)(); |
simonis@6465 | 3506 | signal_setting_t begin_signal_setting = NULL; |
simonis@6465 | 3507 | signal_setting_t end_signal_setting = NULL; |
simonis@6465 | 3508 | begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, |
simonis@6465 | 3509 | dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); |
simonis@6465 | 3510 | if (begin_signal_setting != NULL) { |
simonis@6465 | 3511 | end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, |
simonis@6465 | 3512 | dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); |
simonis@6465 | 3513 | get_signal_action = CAST_TO_FN_PTR(get_signal_t, |
simonis@6465 | 3514 | dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); |
simonis@6465 | 3515 | libjsig_is_loaded = true; |
simonis@6465 | 3516 | assert(UseSignalChaining, "should enable signal-chaining"); |
simonis@6465 | 3517 | } |
simonis@6465 | 3518 | if (libjsig_is_loaded) { |
simonis@6465 | 3519 | // Tell libjsig jvm is setting signal handlers |
simonis@6465 | 3520 | (*begin_signal_setting)(); |
simonis@6465 | 3521 | } |
simonis@6465 | 3522 | |
simonis@6465 | 3523 | set_signal_handler(SIGSEGV, true); |
simonis@6465 | 3524 | set_signal_handler(SIGPIPE, true); |
simonis@6465 | 3525 | set_signal_handler(SIGBUS, true); |
simonis@6465 | 3526 | set_signal_handler(SIGILL, true); |
simonis@6465 | 3527 | set_signal_handler(SIGFPE, true); |
simonis@6465 | 3528 | set_signal_handler(SIGTRAP, true); |
simonis@6465 | 3529 | set_signal_handler(SIGXFSZ, true); |
simonis@6465 | 3530 | set_signal_handler(SIGDANGER, true); |
simonis@6465 | 3531 | |
simonis@6465 | 3532 | if (libjsig_is_loaded) { |
simonis@6465 | 3533 | // Tell libjsig jvm finishes setting signal handlers |
simonis@6465 | 3534 | (*end_signal_setting)(); |
simonis@6465 | 3535 | } |
simonis@6465 | 3536 | |
simonis@6465 | 3537 | // We don't activate signal checker if libjsig is in place, we trust ourselves |
simonis@6465 | 3538 | // and if UserSignalHandler is installed all bets are off. |
simonis@6465 | 3539 | // Log that signal checking is off only if -verbose:jni is specified. |
simonis@6465 | 3540 | if (CheckJNICalls) { |
simonis@6465 | 3541 | if (libjsig_is_loaded) { |
simonis@6465 | 3542 | tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); |
simonis@6465 | 3543 | check_signals = false; |
simonis@6465 | 3544 | } |
simonis@6465 | 3545 | if (AllowUserSignalHandlers) { |
simonis@6465 | 3546 | tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); |
simonis@6465 | 3547 | check_signals = false; |
simonis@6465 | 3548 | } |
simonis@6465 | 3549 | // need to initialize check_signal_done |
simonis@6465 | 3550 | ::sigemptyset(&check_signal_done); |
simonis@6465 | 3551 | } |
simonis@6465 | 3552 | } |
simonis@6465 | 3553 | } |
simonis@6465 | 3554 | |
simonis@6465 | 3555 | static const char* get_signal_handler_name(address handler, |
simonis@6465 | 3556 | char* buf, int buflen) { |
simonis@6465 | 3557 | int offset; |
simonis@6465 | 3558 | bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); |
simonis@6465 | 3559 | if (found) { |
simonis@6465 | 3560 | // skip directory names |
simonis@6465 | 3561 | const char *p1, *p2; |
simonis@6465 | 3562 | p1 = buf; |
simonis@6465 | 3563 | size_t len = strlen(os::file_separator()); |
simonis@6465 | 3564 | while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; |
simonis@6465 | 3565 | // The way os::dll_address_to_library_name is implemented on Aix |
simonis@6465 | 3566 | // right now, it always returns -1 for the offset which is not |
simonis@6465 | 3567 | // terribly informative. |
simonis@6465 | 3568 | // Will fix that. For now, omit the offset. |
simonis@6465 | 3569 | jio_snprintf(buf, buflen, "%s", p1); |
simonis@6465 | 3570 | } else { |
simonis@6465 | 3571 | jio_snprintf(buf, buflen, PTR_FORMAT, handler); |
simonis@6465 | 3572 | } |
simonis@6465 | 3573 | return buf; |
simonis@6465 | 3574 | } |
simonis@6465 | 3575 | |
simonis@6465 | 3576 | static void print_signal_handler(outputStream* st, int sig, |
simonis@6465 | 3577 | char* buf, size_t buflen) { |
simonis@6465 | 3578 | struct sigaction sa; |
simonis@6465 | 3579 | sigaction(sig, NULL, &sa); |
simonis@6465 | 3580 | |
simonis@6465 | 3581 | st->print("%s: ", os::exception_name(sig, buf, buflen)); |
simonis@6465 | 3582 | |
simonis@6465 | 3583 | address handler = (sa.sa_flags & SA_SIGINFO) |
simonis@6465 | 3584 | ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) |
simonis@6465 | 3585 | : CAST_FROM_FN_PTR(address, sa.sa_handler); |
simonis@6465 | 3586 | |
simonis@6465 | 3587 | if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { |
simonis@6465 | 3588 | st->print("SIG_DFL"); |
simonis@6465 | 3589 | } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { |
simonis@6465 | 3590 | st->print("SIG_IGN"); |
simonis@6465 | 3591 | } else { |
simonis@6465 | 3592 | st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); |
simonis@6465 | 3593 | } |
simonis@6465 | 3594 | |
simonis@6465 | 3595 | // Print readable mask. |
simonis@6465 | 3596 | st->print(", sa_mask[0]="); |
simonis@6465 | 3597 | os::Posix::print_signal_set_short(st, &sa.sa_mask); |
simonis@6465 | 3598 | |
simonis@6465 | 3599 | address rh = VMError::get_resetted_sighandler(sig); |
simonis@6465 | 3600 | // May be, handler was resetted by VMError? |
simonis@6465 | 3601 | if (rh != NULL) { |
simonis@6465 | 3602 | handler = rh; |
simonis@6465 | 3603 | sa.sa_flags = VMError::get_resetted_sigflags(sig); |
simonis@6465 | 3604 | } |
simonis@6465 | 3605 | |
simonis@6465 | 3606 | // Print textual representation of sa_flags. |
simonis@6465 | 3607 | st->print(", sa_flags="); |
simonis@6465 | 3608 | os::Posix::print_sa_flags(st, sa.sa_flags); |
simonis@6465 | 3609 | |
simonis@6465 | 3610 | // Check: is it our handler? |
simonis@6465 | 3611 | if (handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)javaSignalHandler) || |
simonis@6465 | 3612 | handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler)) { |
simonis@6465 | 3613 | // It is our signal handler. |
simonis@6465 | 3614 | // Check for flags, reset system-used one! |
simonis@6465 | 3615 | if ((int)sa.sa_flags != os::Aix::get_our_sigflags(sig)) { |
simonis@6465 | 3616 | st->print(", flags was changed from " PTR32_FORMAT ", consider using jsig library", |
simonis@6465 | 3617 | os::Aix::get_our_sigflags(sig)); |
simonis@6465 | 3618 | } |
simonis@6465 | 3619 | } |
simonis@6465 | 3620 | st->cr(); |
simonis@6465 | 3621 | } |
simonis@6465 | 3622 | |
simonis@6465 | 3623 | |
simonis@6465 | 3624 | #define DO_SIGNAL_CHECK(sig) \ |
simonis@6465 | 3625 | if (!sigismember(&check_signal_done, sig)) \ |
simonis@6465 | 3626 | os::Aix::check_signal_handler(sig) |
simonis@6465 | 3627 | |
simonis@6465 | 3628 | // This method is a periodic task to check for misbehaving JNI applications |
simonis@6465 | 3629 | // under CheckJNI, we can add any periodic checks here |
simonis@6465 | 3630 | |
simonis@6465 | 3631 | void os::run_periodic_checks() { |
simonis@6465 | 3632 | |
simonis@6465 | 3633 | if (check_signals == false) return; |
simonis@6465 | 3634 | |
simonis@6465 | 3635 | // SEGV and BUS if overridden could potentially prevent |
simonis@6465 | 3636 | // generation of hs*.log in the event of a crash, debugging |
simonis@6465 | 3637 | // such a case can be very challenging, so we absolutely |
simonis@6465 | 3638 | // check the following for a good measure: |
simonis@6465 | 3639 | DO_SIGNAL_CHECK(SIGSEGV); |
simonis@6465 | 3640 | DO_SIGNAL_CHECK(SIGILL); |
simonis@6465 | 3641 | DO_SIGNAL_CHECK(SIGFPE); |
simonis@6465 | 3642 | DO_SIGNAL_CHECK(SIGBUS); |
simonis@6465 | 3643 | DO_SIGNAL_CHECK(SIGPIPE); |
simonis@6465 | 3644 | DO_SIGNAL_CHECK(SIGXFSZ); |
simonis@6465 | 3645 | if (UseSIGTRAP) { |
simonis@6465 | 3646 | DO_SIGNAL_CHECK(SIGTRAP); |
simonis@6465 | 3647 | } |
simonis@6465 | 3648 | DO_SIGNAL_CHECK(SIGDANGER); |
simonis@6465 | 3649 | |
simonis@6465 | 3650 | // ReduceSignalUsage allows the user to override these handlers |
simonis@6465 | 3651 | // see comments at the very top and jvm_solaris.h |
simonis@6465 | 3652 | if (!ReduceSignalUsage) { |
simonis@6465 | 3653 | DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); |
simonis@6465 | 3654 | DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); |
simonis@6465 | 3655 | DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); |
simonis@6465 | 3656 | DO_SIGNAL_CHECK(BREAK_SIGNAL); |
simonis@6465 | 3657 | } |
simonis@6465 | 3658 | |
simonis@6465 | 3659 | DO_SIGNAL_CHECK(SR_signum); |
simonis@6465 | 3660 | DO_SIGNAL_CHECK(INTERRUPT_SIGNAL); |
simonis@6465 | 3661 | } |
simonis@6465 | 3662 | |
simonis@6465 | 3663 | typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); |
simonis@6465 | 3664 | |
simonis@6465 | 3665 | static os_sigaction_t os_sigaction = NULL; |
simonis@6465 | 3666 | |
simonis@6465 | 3667 | void os::Aix::check_signal_handler(int sig) { |
simonis@6465 | 3668 | char buf[O_BUFLEN]; |
simonis@6465 | 3669 | address jvmHandler = NULL; |
simonis@6465 | 3670 | |
simonis@6465 | 3671 | struct sigaction act; |
simonis@6465 | 3672 | if (os_sigaction == NULL) { |
simonis@6465 | 3673 | // only trust the default sigaction, in case it has been interposed |
simonis@6465 | 3674 | os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); |
simonis@6465 | 3675 | if (os_sigaction == NULL) return; |
simonis@6465 | 3676 | } |
simonis@6465 | 3677 | |
simonis@6465 | 3678 | os_sigaction(sig, (struct sigaction*)NULL, &act); |
simonis@6465 | 3679 | |
simonis@6465 | 3680 | address thisHandler = (act.sa_flags & SA_SIGINFO) |
simonis@6465 | 3681 | ? CAST_FROM_FN_PTR(address, act.sa_sigaction) |
simonis@6465 | 3682 | : CAST_FROM_FN_PTR(address, act.sa_handler); |
simonis@6465 | 3683 | |
simonis@6465 | 3684 | |
simonis@6465 | 3685 | switch(sig) { |
simonis@6465 | 3686 | case SIGSEGV: |
simonis@6465 | 3687 | case SIGBUS: |
simonis@6465 | 3688 | case SIGFPE: |
simonis@6465 | 3689 | case SIGPIPE: |
simonis@6465 | 3690 | case SIGILL: |
simonis@6465 | 3691 | case SIGXFSZ: |
simonis@6465 | 3692 | // Renamed 'signalHandler' to avoid collision with other shared libs. |
simonis@6465 | 3693 | jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)javaSignalHandler); |
simonis@6465 | 3694 | break; |
simonis@6465 | 3695 | |
simonis@6465 | 3696 | case SHUTDOWN1_SIGNAL: |
simonis@6465 | 3697 | case SHUTDOWN2_SIGNAL: |
simonis@6465 | 3698 | case SHUTDOWN3_SIGNAL: |
simonis@6465 | 3699 | case BREAK_SIGNAL: |
simonis@6465 | 3700 | jvmHandler = (address)user_handler(); |
simonis@6465 | 3701 | break; |
simonis@6465 | 3702 | |
simonis@6465 | 3703 | case INTERRUPT_SIGNAL: |
simonis@6465 | 3704 | jvmHandler = CAST_FROM_FN_PTR(address, SIG_DFL); |
simonis@6465 | 3705 | break; |
simonis@6465 | 3706 | |
simonis@6465 | 3707 | default: |
simonis@6465 | 3708 | if (sig == SR_signum) { |
simonis@6465 | 3709 | jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler); |
simonis@6465 | 3710 | } else { |
simonis@6465 | 3711 | return; |
simonis@6465 | 3712 | } |
simonis@6465 | 3713 | break; |
simonis@6465 | 3714 | } |
simonis@6465 | 3715 | |
simonis@6465 | 3716 | if (thisHandler != jvmHandler) { |
simonis@6465 | 3717 | tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); |
simonis@6465 | 3718 | tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); |
simonis@6465 | 3719 | tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); |
simonis@6465 | 3720 | // No need to check this sig any longer |
simonis@6465 | 3721 | sigaddset(&check_signal_done, sig); |
simonis@6465 | 3722 | } else if (os::Aix::get_our_sigflags(sig) != 0 && (int)act.sa_flags != os::Aix::get_our_sigflags(sig)) { |
simonis@6465 | 3723 | tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); |
simonis@6465 | 3724 | tty->print("expected:" PTR32_FORMAT, os::Aix::get_our_sigflags(sig)); |
simonis@6465 | 3725 | tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); |
simonis@6465 | 3726 | // No need to check this sig any longer |
simonis@6465 | 3727 | sigaddset(&check_signal_done, sig); |
simonis@6465 | 3728 | } |
simonis@6465 | 3729 | |
simonis@6465 | 3730 | // Dump all the signal |
simonis@6465 | 3731 | if (sigismember(&check_signal_done, sig)) { |
simonis@6465 | 3732 | print_signal_handlers(tty, buf, O_BUFLEN); |
simonis@6465 | 3733 | } |
simonis@6465 | 3734 | } |
simonis@6465 | 3735 | |
simonis@6465 | 3736 | extern bool signal_name(int signo, char* buf, size_t len); |
simonis@6465 | 3737 | |
simonis@6465 | 3738 | const char* os::exception_name(int exception_code, char* buf, size_t size) { |
simonis@6465 | 3739 | if (0 < exception_code && exception_code <= SIGRTMAX) { |
simonis@6465 | 3740 | // signal |
simonis@6465 | 3741 | if (!signal_name(exception_code, buf, size)) { |
simonis@6465 | 3742 | jio_snprintf(buf, size, "SIG%d", exception_code); |
simonis@6465 | 3743 | } |
simonis@6465 | 3744 | return buf; |
simonis@6465 | 3745 | } else { |
simonis@6465 | 3746 | return NULL; |
simonis@6465 | 3747 | } |
simonis@6465 | 3748 | } |
simonis@6465 | 3749 | |
simonis@6465 | 3750 | // To install functions for atexit system call |
simonis@6465 | 3751 | extern "C" { |
simonis@6465 | 3752 | static void perfMemory_exit_helper() { |
simonis@6465 | 3753 | perfMemory_exit(); |
simonis@6465 | 3754 | } |
simonis@6465 | 3755 | } |
simonis@6465 | 3756 | |
simonis@6465 | 3757 | // This is called _before_ the most of global arguments have been parsed. |
simonis@6465 | 3758 | void os::init(void) { |
simonis@6465 | 3759 | // This is basic, we want to know if that ever changes. |
simonis@6465 | 3760 | // (shared memory boundary is supposed to be a 256M aligned) |
simonis@6465 | 3761 | assert(SHMLBA == ((uint64_t)0x10000000ULL)/*256M*/, "unexpected"); |
simonis@6465 | 3762 | |
simonis@6465 | 3763 | // First off, we need to know whether we run on AIX or PASE, and |
simonis@6465 | 3764 | // the OS level we run on. |
simonis@6465 | 3765 | os::Aix::initialize_os_info(); |
simonis@6465 | 3766 | |
simonis@6465 | 3767 | // Scan environment (SPEC1170 behaviour, etc) |
simonis@6465 | 3768 | os::Aix::scan_environment(); |
simonis@6465 | 3769 | |
simonis@6465 | 3770 | // Check which pages are supported by AIX. |
simonis@6465 | 3771 | os::Aix::query_multipage_support(); |
simonis@6465 | 3772 | |
simonis@6465 | 3773 | // Next, we need to initialize libo4 and libperfstat libraries. |
simonis@6465 | 3774 | if (os::Aix::on_pase()) { |
simonis@6465 | 3775 | os::Aix::initialize_libo4(); |
simonis@6465 | 3776 | } else { |
simonis@6465 | 3777 | os::Aix::initialize_libperfstat(); |
simonis@6465 | 3778 | } |
simonis@6465 | 3779 | |
simonis@6465 | 3780 | // Reset the perfstat information provided by ODM. |
simonis@6465 | 3781 | if (os::Aix::on_aix()) { |
simonis@6465 | 3782 | libperfstat::perfstat_reset(); |
simonis@6465 | 3783 | } |
simonis@6465 | 3784 | |
simonis@6465 | 3785 | // Now initialze basic system properties. Note that for some of the values we |
simonis@6465 | 3786 | // need libperfstat etc. |
simonis@6465 | 3787 | os::Aix::initialize_system_info(); |
simonis@6465 | 3788 | |
simonis@6465 | 3789 | // Initialize large page support. |
simonis@6465 | 3790 | if (UseLargePages) { |
simonis@6465 | 3791 | os::large_page_init(); |
simonis@6465 | 3792 | if (!UseLargePages) { |
simonis@6465 | 3793 | // initialize os::_page_sizes |
simonis@6465 | 3794 | _page_sizes[0] = Aix::page_size(); |
simonis@6465 | 3795 | _page_sizes[1] = 0; |
simonis@6465 | 3796 | if (Verbose) { |
simonis@6465 | 3797 | fprintf(stderr, "Large Page initialization failed: setting UseLargePages=0.\n"); |
simonis@6465 | 3798 | } |
simonis@6465 | 3799 | } |
simonis@6465 | 3800 | } else { |
simonis@6465 | 3801 | // initialize os::_page_sizes |
simonis@6465 | 3802 | _page_sizes[0] = Aix::page_size(); |
simonis@6465 | 3803 | _page_sizes[1] = 0; |
simonis@6465 | 3804 | } |
simonis@6465 | 3805 | |
simonis@6465 | 3806 | // debug trace |
simonis@6465 | 3807 | if (Verbose) { |
simonis@6465 | 3808 | fprintf(stderr, "os::vm_page_size 0x%llX\n", os::vm_page_size()); |
simonis@6465 | 3809 | fprintf(stderr, "os::large_page_size 0x%llX\n", os::large_page_size()); |
simonis@6465 | 3810 | fprintf(stderr, "os::_page_sizes = ( "); |
simonis@6465 | 3811 | for (int i = 0; _page_sizes[i]; i ++) { |
simonis@6465 | 3812 | fprintf(stderr, " %s ", describe_pagesize(_page_sizes[i])); |
simonis@6465 | 3813 | } |
simonis@6465 | 3814 | fprintf(stderr, ")\n"); |
simonis@6465 | 3815 | } |
simonis@6465 | 3816 | |
simonis@6465 | 3817 | _initial_pid = getpid(); |
simonis@6465 | 3818 | |
simonis@6465 | 3819 | clock_tics_per_sec = sysconf(_SC_CLK_TCK); |
simonis@6465 | 3820 | |
simonis@6465 | 3821 | init_random(1234567); |
simonis@6465 | 3822 | |
simonis@6465 | 3823 | ThreadCritical::initialize(); |
simonis@6465 | 3824 | |
simonis@6465 | 3825 | // Main_thread points to the aboriginal thread. |
simonis@6465 | 3826 | Aix::_main_thread = pthread_self(); |
simonis@6465 | 3827 | |
simonis@6465 | 3828 | initial_time_count = os::elapsed_counter(); |
simonis@6465 | 3829 | pthread_mutex_init(&dl_mutex, NULL); |
simonis@6465 | 3830 | } |
simonis@6465 | 3831 | |
simonis@6465 | 3832 | // this is called _after_ the global arguments have been parsed |
simonis@6465 | 3833 | jint os::init_2(void) { |
simonis@6465 | 3834 | |
simonis@6465 | 3835 | if (Verbose) { |
simonis@6465 | 3836 | fprintf(stderr, "processor count: %d\n", os::_processor_count); |
simonis@6465 | 3837 | fprintf(stderr, "physical memory: %lu\n", Aix::_physical_memory); |
simonis@6465 | 3838 | } |
simonis@6465 | 3839 | |
simonis@6465 | 3840 | // initially build up the loaded dll map |
simonis@6465 | 3841 | LoadedLibraries::reload(); |
simonis@6465 | 3842 | |
simonis@6465 | 3843 | const int page_size = Aix::page_size(); |
simonis@6465 | 3844 | const int map_size = page_size; |
simonis@6465 | 3845 | |
simonis@6465 | 3846 | address map_address = (address) MAP_FAILED; |
simonis@6465 | 3847 | const int prot = PROT_READ; |
simonis@6465 | 3848 | const int flags = MAP_PRIVATE|MAP_ANONYMOUS; |
simonis@6465 | 3849 | |
simonis@6465 | 3850 | // use optimized addresses for the polling page, |
simonis@6465 | 3851 | // e.g. map it to a special 32-bit address. |
simonis@6465 | 3852 | if (OptimizePollingPageLocation) { |
simonis@6465 | 3853 | // architecture-specific list of address wishes: |
simonis@6465 | 3854 | address address_wishes[] = { |
simonis@6465 | 3855 | // AIX: addresses lower than 0x30000000 don't seem to work on AIX. |
simonis@6465 | 3856 | // PPC64: all address wishes are non-negative 32 bit values where |
simonis@6465 | 3857 | // the lower 16 bits are all zero. we can load these addresses |
simonis@6465 | 3858 | // with a single ppc_lis instruction. |
simonis@6465 | 3859 | (address) 0x30000000, (address) 0x31000000, |
simonis@6465 | 3860 | (address) 0x32000000, (address) 0x33000000, |
simonis@6465 | 3861 | (address) 0x40000000, (address) 0x41000000, |
simonis@6465 | 3862 | (address) 0x42000000, (address) 0x43000000, |
simonis@6465 | 3863 | (address) 0x50000000, (address) 0x51000000, |
simonis@6465 | 3864 | (address) 0x52000000, (address) 0x53000000, |
simonis@6465 | 3865 | (address) 0x60000000, (address) 0x61000000, |
simonis@6465 | 3866 | (address) 0x62000000, (address) 0x63000000 |
simonis@6465 | 3867 | }; |
simonis@6465 | 3868 | int address_wishes_length = sizeof(address_wishes)/sizeof(address); |
simonis@6465 | 3869 | |
simonis@6465 | 3870 | // iterate over the list of address wishes: |
simonis@6465 | 3871 | for (int i=0; i<address_wishes_length; i++) { |
simonis@6465 | 3872 | // try to map with current address wish. |
simonis@6465 | 3873 | // AIX: AIX needs MAP_FIXED if we provide an address and mmap will |
simonis@6465 | 3874 | // fail if the address is already mapped. |
simonis@6465 | 3875 | map_address = (address) ::mmap(address_wishes[i] - (ssize_t)page_size, |
simonis@6465 | 3876 | map_size, prot, |
simonis@6465 | 3877 | flags | MAP_FIXED, |
simonis@6465 | 3878 | -1, 0); |
simonis@6465 | 3879 | if (Verbose) { |
simonis@6465 | 3880 | fprintf(stderr, "SafePoint Polling Page address: %p (wish) => %p\n", |
simonis@6465 | 3881 | address_wishes[i], map_address + (ssize_t)page_size); |
simonis@6465 | 3882 | } |
simonis@6465 | 3883 | |
simonis@6465 | 3884 | if (map_address + (ssize_t)page_size == address_wishes[i]) { |
simonis@6465 | 3885 | // map succeeded and map_address is at wished address, exit loop. |
simonis@6465 | 3886 | break; |
simonis@6465 | 3887 | } |
simonis@6465 | 3888 | |
simonis@6465 | 3889 | if (map_address != (address) MAP_FAILED) { |
simonis@6465 | 3890 | // map succeeded, but polling_page is not at wished address, unmap and continue. |
simonis@6465 | 3891 | ::munmap(map_address, map_size); |
simonis@6465 | 3892 | map_address = (address) MAP_FAILED; |
simonis@6465 | 3893 | } |
simonis@6465 | 3894 | // map failed, continue loop. |
simonis@6465 | 3895 | } |
simonis@6465 | 3896 | } // end OptimizePollingPageLocation |
simonis@6465 | 3897 | |
simonis@6465 | 3898 | if (map_address == (address) MAP_FAILED) { |
simonis@6465 | 3899 | map_address = (address) ::mmap(NULL, map_size, prot, flags, -1, 0); |
simonis@6465 | 3900 | } |
simonis@6465 | 3901 | guarantee(map_address != MAP_FAILED, "os::init_2: failed to allocate polling page"); |
simonis@6465 | 3902 | os::set_polling_page(map_address); |
simonis@6465 | 3903 | |
simonis@6465 | 3904 | if (!UseMembar) { |
simonis@6465 | 3905 | address mem_serialize_page = (address) ::mmap(NULL, Aix::page_size(), PROT_READ | PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); |
simonis@6465 | 3906 | guarantee(mem_serialize_page != NULL, "mmap Failed for memory serialize page"); |
simonis@6465 | 3907 | os::set_memory_serialize_page(mem_serialize_page); |
simonis@6465 | 3908 | |
simonis@6465 | 3909 | #ifndef PRODUCT |
simonis@6465 | 3910 | if (Verbose && PrintMiscellaneous) |
simonis@6465 | 3911 | tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); |
simonis@6465 | 3912 | #endif |
simonis@6465 | 3913 | } |
simonis@6465 | 3914 | |
simonis@6465 | 3915 | // initialize suspend/resume support - must do this before signal_sets_init() |
simonis@6465 | 3916 | if (SR_initialize() != 0) { |
simonis@6465 | 3917 | perror("SR_initialize failed"); |
simonis@6465 | 3918 | return JNI_ERR; |
simonis@6465 | 3919 | } |
simonis@6465 | 3920 | |
simonis@6465 | 3921 | Aix::signal_sets_init(); |
simonis@6465 | 3922 | Aix::install_signal_handlers(); |
simonis@6465 | 3923 | |
simonis@6465 | 3924 | // Check minimum allowable stack size for thread creation and to initialize |
simonis@6465 | 3925 | // the java system classes, including StackOverflowError - depends on page |
simonis@6465 | 3926 | // size. Add a page for compiler2 recursion in main thread. |
simonis@6465 | 3927 | // Add in 2*BytesPerWord times page size to account for VM stack during |
simonis@6465 | 3928 | // class initialization depending on 32 or 64 bit VM. |
simonis@6465 | 3929 | os::Aix::min_stack_allowed = MAX2(os::Aix::min_stack_allowed, |
simonis@6465 | 3930 | (size_t)(StackYellowPages+StackRedPages+StackShadowPages + |
simonis@6465 | 3931 | 2*BytesPerWord COMPILER2_PRESENT(+1)) * Aix::page_size()); |
simonis@6465 | 3932 | |
simonis@6465 | 3933 | size_t threadStackSizeInBytes = ThreadStackSize * K; |
simonis@6465 | 3934 | if (threadStackSizeInBytes != 0 && |
simonis@6465 | 3935 | threadStackSizeInBytes < os::Aix::min_stack_allowed) { |
simonis@6465 | 3936 | tty->print_cr("\nThe stack size specified is too small, " |
simonis@6465 | 3937 | "Specify at least %dk", |
simonis@6465 | 3938 | os::Aix::min_stack_allowed / K); |
simonis@6465 | 3939 | return JNI_ERR; |
simonis@6465 | 3940 | } |
simonis@6465 | 3941 | |
simonis@6465 | 3942 | // Make the stack size a multiple of the page size so that |
simonis@6465 | 3943 | // the yellow/red zones can be guarded. |
simonis@6465 | 3944 | // note that this can be 0, if no default stacksize was set |
simonis@6465 | 3945 | JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, vm_page_size())); |
simonis@6465 | 3946 | |
simonis@6465 | 3947 | Aix::libpthread_init(); |
simonis@6465 | 3948 | |
simonis@6465 | 3949 | if (MaxFDLimit) { |
simonis@6465 | 3950 | // set the number of file descriptors to max. print out error |
simonis@6465 | 3951 | // if getrlimit/setrlimit fails but continue regardless. |
simonis@6465 | 3952 | struct rlimit nbr_files; |
simonis@6465 | 3953 | int status = getrlimit(RLIMIT_NOFILE, &nbr_files); |
simonis@6465 | 3954 | if (status != 0) { |
simonis@6465 | 3955 | if (PrintMiscellaneous && (Verbose || WizardMode)) |
simonis@6465 | 3956 | perror("os::init_2 getrlimit failed"); |
simonis@6465 | 3957 | } else { |
simonis@6465 | 3958 | nbr_files.rlim_cur = nbr_files.rlim_max; |
simonis@6465 | 3959 | status = setrlimit(RLIMIT_NOFILE, &nbr_files); |
simonis@6465 | 3960 | if (status != 0) { |
simonis@6465 | 3961 | if (PrintMiscellaneous && (Verbose || WizardMode)) |
simonis@6465 | 3962 | perror("os::init_2 setrlimit failed"); |
simonis@6465 | 3963 | } |
simonis@6465 | 3964 | } |
simonis@6465 | 3965 | } |
simonis@6465 | 3966 | |
simonis@6465 | 3967 | if (PerfAllowAtExitRegistration) { |
simonis@6465 | 3968 | // only register atexit functions if PerfAllowAtExitRegistration is set. |
simonis@6465 | 3969 | // atexit functions can be delayed until process exit time, which |
simonis@6465 | 3970 | // can be problematic for embedded VM situations. Embedded VMs should |
simonis@6465 | 3971 | // call DestroyJavaVM() to assure that VM resources are released. |
simonis@6465 | 3972 | |
simonis@6465 | 3973 | // note: perfMemory_exit_helper atexit function may be removed in |
simonis@6465 | 3974 | // the future if the appropriate cleanup code can be added to the |
simonis@6465 | 3975 | // VM_Exit VMOperation's doit method. |
simonis@6465 | 3976 | if (atexit(perfMemory_exit_helper) != 0) { |
simonis@6465 | 3977 | warning("os::init_2 atexit(perfMemory_exit_helper) failed"); |
simonis@6465 | 3978 | } |
simonis@6465 | 3979 | } |
simonis@6465 | 3980 | |
simonis@6465 | 3981 | return JNI_OK; |
simonis@6465 | 3982 | } |
simonis@6465 | 3983 | |
simonis@6465 | 3984 | // this is called at the end of vm_initialization |
simonis@6465 | 3985 | void os::init_3(void) { |
simonis@6465 | 3986 | return; |
simonis@6465 | 3987 | } |
simonis@6465 | 3988 | |
simonis@6465 | 3989 | // Mark the polling page as unreadable |
simonis@6465 | 3990 | void os::make_polling_page_unreadable(void) { |
simonis@6465 | 3991 | if (!guard_memory((char*)_polling_page, Aix::page_size())) { |
simonis@6465 | 3992 | fatal("Could not disable polling page"); |
simonis@6465 | 3993 | } |
simonis@6465 | 3994 | }; |
simonis@6465 | 3995 | |
simonis@6465 | 3996 | // Mark the polling page as readable |
simonis@6465 | 3997 | void os::make_polling_page_readable(void) { |
simonis@6465 | 3998 | // Changed according to os_linux.cpp. |
simonis@6465 | 3999 | if (!checked_mprotect((char *)_polling_page, Aix::page_size(), PROT_READ)) { |
simonis@6465 | 4000 | fatal(err_msg("Could not enable polling page at " PTR_FORMAT, _polling_page)); |
simonis@6465 | 4001 | } |
simonis@6465 | 4002 | }; |
simonis@6465 | 4003 | |
simonis@6465 | 4004 | int os::active_processor_count() { |
simonis@6465 | 4005 | int online_cpus = ::sysconf(_SC_NPROCESSORS_ONLN); |
simonis@6465 | 4006 | assert(online_cpus > 0 && online_cpus <= processor_count(), "sanity check"); |
simonis@6465 | 4007 | return online_cpus; |
simonis@6465 | 4008 | } |
simonis@6465 | 4009 | |
simonis@6465 | 4010 | void os::set_native_thread_name(const char *name) { |
simonis@6465 | 4011 | // Not yet implemented. |
simonis@6465 | 4012 | return; |
simonis@6465 | 4013 | } |
simonis@6465 | 4014 | |
simonis@6465 | 4015 | bool os::distribute_processes(uint length, uint* distribution) { |
simonis@6465 | 4016 | // Not yet implemented. |
simonis@6465 | 4017 | return false; |
simonis@6465 | 4018 | } |
simonis@6465 | 4019 | |
simonis@6465 | 4020 | bool os::bind_to_processor(uint processor_id) { |
simonis@6465 | 4021 | // Not yet implemented. |
simonis@6465 | 4022 | return false; |
simonis@6465 | 4023 | } |
simonis@6465 | 4024 | |
simonis@6465 | 4025 | void os::SuspendedThreadTask::internal_do_task() { |
simonis@6465 | 4026 | if (do_suspend(_thread->osthread())) { |
simonis@6465 | 4027 | SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext()); |
simonis@6465 | 4028 | do_task(context); |
simonis@6465 | 4029 | do_resume(_thread->osthread()); |
simonis@6465 | 4030 | } |
simonis@6465 | 4031 | } |
simonis@6465 | 4032 | |
simonis@6465 | 4033 | class PcFetcher : public os::SuspendedThreadTask { |
simonis@6465 | 4034 | public: |
simonis@6465 | 4035 | PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {} |
simonis@6465 | 4036 | ExtendedPC result(); |
simonis@6465 | 4037 | protected: |
simonis@6465 | 4038 | void do_task(const os::SuspendedThreadTaskContext& context); |
simonis@6465 | 4039 | private: |
simonis@6465 | 4040 | ExtendedPC _epc; |
simonis@6465 | 4041 | }; |
simonis@6465 | 4042 | |
simonis@6465 | 4043 | ExtendedPC PcFetcher::result() { |
simonis@6465 | 4044 | guarantee(is_done(), "task is not done yet."); |
simonis@6465 | 4045 | return _epc; |
simonis@6465 | 4046 | } |
simonis@6465 | 4047 | |
simonis@6465 | 4048 | void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) { |
simonis@6465 | 4049 | Thread* thread = context.thread(); |
simonis@6465 | 4050 | OSThread* osthread = thread->osthread(); |
simonis@6465 | 4051 | if (osthread->ucontext() != NULL) { |
simonis@6465 | 4052 | _epc = os::Aix::ucontext_get_pc((ucontext_t *) context.ucontext()); |
simonis@6465 | 4053 | } else { |
simonis@6465 | 4054 | // NULL context is unexpected, double-check this is the VMThread. |
simonis@6465 | 4055 | guarantee(thread->is_VM_thread(), "can only be called for VMThread"); |
simonis@6465 | 4056 | } |
simonis@6465 | 4057 | } |
simonis@6465 | 4058 | |
simonis@6465 | 4059 | // Suspends the target using the signal mechanism and then grabs the PC before |
simonis@6465 | 4060 | // resuming the target. Used by the flat-profiler only |
simonis@6465 | 4061 | ExtendedPC os::get_thread_pc(Thread* thread) { |
simonis@6465 | 4062 | // Make sure that it is called by the watcher for the VMThread. |
simonis@6465 | 4063 | assert(Thread::current()->is_Watcher_thread(), "Must be watcher"); |
simonis@6465 | 4064 | assert(thread->is_VM_thread(), "Can only be called for VMThread"); |
simonis@6465 | 4065 | |
simonis@6465 | 4066 | PcFetcher fetcher(thread); |
simonis@6465 | 4067 | fetcher.run(); |
simonis@6465 | 4068 | return fetcher.result(); |
simonis@6465 | 4069 | } |
simonis@6465 | 4070 | |
simonis@6465 | 4071 | // Not neede on Aix. |
simonis@6465 | 4072 | // int os::Aix::safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime) { |
simonis@6465 | 4073 | // } |
simonis@6465 | 4074 | |
simonis@6465 | 4075 | //////////////////////////////////////////////////////////////////////////////// |
simonis@6465 | 4076 | // debug support |
simonis@6465 | 4077 | |
simonis@6465 | 4078 | static address same_page(address x, address y) { |
simonis@6465 | 4079 | intptr_t page_bits = -os::vm_page_size(); |
simonis@6465 | 4080 | if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) |
simonis@6465 | 4081 | return x; |
simonis@6465 | 4082 | else if (x > y) |
simonis@6465 | 4083 | return (address)(intptr_t(y) | ~page_bits) + 1; |
simonis@6465 | 4084 | else |
simonis@6465 | 4085 | return (address)(intptr_t(y) & page_bits); |
simonis@6465 | 4086 | } |
simonis@6465 | 4087 | |
simonis@6465 | 4088 | bool os::find(address addr, outputStream* st) { |
goetz@6501 | 4089 | |
goetz@6501 | 4090 | st->print(PTR_FORMAT ": ", addr); |
goetz@6501 | 4091 | |
goetz@6501 | 4092 | const LoadedLibraryModule* lib = LoadedLibraries::find_for_text_address(addr); |
goetz@6501 | 4093 | if (lib) { |
goetz@6501 | 4094 | lib->print(st); |
goetz@6501 | 4095 | return true; |
goetz@6501 | 4096 | } else { |
goetz@6501 | 4097 | lib = LoadedLibraries::find_for_data_address(addr); |
goetz@6501 | 4098 | if (lib) { |
goetz@6501 | 4099 | lib->print(st); |
goetz@6501 | 4100 | return true; |
goetz@6501 | 4101 | } else { |
goetz@6501 | 4102 | st->print_cr("(outside any module)"); |
goetz@6501 | 4103 | } |
goetz@6501 | 4104 | } |
goetz@6501 | 4105 | |
simonis@6465 | 4106 | return false; |
simonis@6465 | 4107 | } |
simonis@6465 | 4108 | |
simonis@6465 | 4109 | //////////////////////////////////////////////////////////////////////////////// |
simonis@6465 | 4110 | // misc |
simonis@6465 | 4111 | |
simonis@6465 | 4112 | // This does not do anything on Aix. This is basically a hook for being |
simonis@6465 | 4113 | // able to use structured exception handling (thread-local exception filters) |
simonis@6465 | 4114 | // on, e.g., Win32. |
simonis@6465 | 4115 | void |
simonis@6465 | 4116 | os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, |
simonis@6465 | 4117 | JavaCallArguments* args, Thread* thread) { |
simonis@6465 | 4118 | f(value, method, args, thread); |
simonis@6465 | 4119 | } |
simonis@6465 | 4120 | |
simonis@6465 | 4121 | void os::print_statistics() { |
simonis@6465 | 4122 | } |
simonis@6465 | 4123 | |
simonis@6465 | 4124 | int os::message_box(const char* title, const char* message) { |
simonis@6465 | 4125 | int i; |
simonis@6465 | 4126 | fdStream err(defaultStream::error_fd()); |
simonis@6465 | 4127 | for (i = 0; i < 78; i++) err.print_raw("="); |
simonis@6465 | 4128 | err.cr(); |
simonis@6465 | 4129 | err.print_raw_cr(title); |
simonis@6465 | 4130 | for (i = 0; i < 78; i++) err.print_raw("-"); |
simonis@6465 | 4131 | err.cr(); |
simonis@6465 | 4132 | err.print_raw_cr(message); |
simonis@6465 | 4133 | for (i = 0; i < 78; i++) err.print_raw("="); |
simonis@6465 | 4134 | err.cr(); |
simonis@6465 | 4135 | |
simonis@6465 | 4136 | char buf[16]; |
simonis@6465 | 4137 | // Prevent process from exiting upon "read error" without consuming all CPU |
simonis@6465 | 4138 | while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } |
simonis@6465 | 4139 | |
simonis@6465 | 4140 | return buf[0] == 'y' || buf[0] == 'Y'; |
simonis@6465 | 4141 | } |
simonis@6465 | 4142 | |
simonis@6465 | 4143 | int os::stat(const char *path, struct stat *sbuf) { |
simonis@6465 | 4144 | char pathbuf[MAX_PATH]; |
simonis@6465 | 4145 | if (strlen(path) > MAX_PATH - 1) { |
simonis@6465 | 4146 | errno = ENAMETOOLONG; |
simonis@6465 | 4147 | return -1; |
simonis@6465 | 4148 | } |
simonis@6465 | 4149 | os::native_path(strcpy(pathbuf, path)); |
simonis@6465 | 4150 | return ::stat(pathbuf, sbuf); |
simonis@6465 | 4151 | } |
simonis@6465 | 4152 | |
simonis@6465 | 4153 | bool os::check_heap(bool force) { |
simonis@6465 | 4154 | return true; |
simonis@6465 | 4155 | } |
simonis@6465 | 4156 | |
simonis@6465 | 4157 | // int local_vsnprintf(char* buf, size_t count, const char* format, va_list args) { |
simonis@6465 | 4158 | // return ::vsnprintf(buf, count, format, args); |
simonis@6465 | 4159 | // } |
simonis@6465 | 4160 | |
simonis@6465 | 4161 | // Is a (classpath) directory empty? |
simonis@6465 | 4162 | bool os::dir_is_empty(const char* path) { |
goetz@6501 | 4163 | DIR *dir = NULL; |
goetz@6501 | 4164 | struct dirent *ptr; |
goetz@6501 | 4165 | |
goetz@6501 | 4166 | dir = opendir(path); |
goetz@6501 | 4167 | if (dir == NULL) return true; |
goetz@6501 | 4168 | |
goetz@6501 | 4169 | /* Scan the directory */ |
goetz@6501 | 4170 | bool result = true; |
goetz@6501 | 4171 | char buf[sizeof(struct dirent) + MAX_PATH]; |
goetz@6501 | 4172 | while (result && (ptr = ::readdir(dir)) != NULL) { |
goetz@6501 | 4173 | if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { |
goetz@6501 | 4174 | result = false; |
goetz@6501 | 4175 | } |
goetz@6501 | 4176 | } |
goetz@6501 | 4177 | closedir(dir); |
goetz@6501 | 4178 | return result; |
simonis@6465 | 4179 | } |
simonis@6465 | 4180 | |
simonis@6465 | 4181 | // This code originates from JDK's sysOpen and open64_w |
simonis@6465 | 4182 | // from src/solaris/hpi/src/system_md.c |
simonis@6465 | 4183 | |
simonis@6465 | 4184 | #ifndef O_DELETE |
simonis@6465 | 4185 | #define O_DELETE 0x10000 |
simonis@6465 | 4186 | #endif |
simonis@6465 | 4187 | |
simonis@6465 | 4188 | // Open a file. Unlink the file immediately after open returns |
simonis@6465 | 4189 | // if the specified oflag has the O_DELETE flag set. |
simonis@6465 | 4190 | // O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c |
simonis@6465 | 4191 | |
simonis@6465 | 4192 | int os::open(const char *path, int oflag, int mode) { |
simonis@6465 | 4193 | |
simonis@6465 | 4194 | if (strlen(path) > MAX_PATH - 1) { |
simonis@6465 | 4195 | errno = ENAMETOOLONG; |
simonis@6465 | 4196 | return -1; |
simonis@6465 | 4197 | } |
simonis@6465 | 4198 | int fd; |
simonis@6465 | 4199 | int o_delete = (oflag & O_DELETE); |
simonis@6465 | 4200 | oflag = oflag & ~O_DELETE; |
simonis@6465 | 4201 | |
simonis@6465 | 4202 | fd = ::open64(path, oflag, mode); |
simonis@6465 | 4203 | if (fd == -1) return -1; |
simonis@6465 | 4204 | |
goetz@6501 | 4205 | // If the open succeeded, the file might still be a directory. |
simonis@6465 | 4206 | { |
simonis@6465 | 4207 | struct stat64 buf64; |
simonis@6465 | 4208 | int ret = ::fstat64(fd, &buf64); |
simonis@6465 | 4209 | int st_mode = buf64.st_mode; |
simonis@6465 | 4210 | |
simonis@6465 | 4211 | if (ret != -1) { |
simonis@6465 | 4212 | if ((st_mode & S_IFMT) == S_IFDIR) { |
simonis@6465 | 4213 | errno = EISDIR; |
simonis@6465 | 4214 | ::close(fd); |
simonis@6465 | 4215 | return -1; |
simonis@6465 | 4216 | } |
simonis@6465 | 4217 | } else { |
simonis@6465 | 4218 | ::close(fd); |
simonis@6465 | 4219 | return -1; |
simonis@6465 | 4220 | } |
simonis@6465 | 4221 | } |
simonis@6465 | 4222 | |
simonis@6465 | 4223 | // All file descriptors that are opened in the JVM and not |
simonis@6465 | 4224 | // specifically destined for a subprocess should have the |
simonis@6465 | 4225 | // close-on-exec flag set. If we don't set it, then careless 3rd |
simonis@6465 | 4226 | // party native code might fork and exec without closing all |
simonis@6465 | 4227 | // appropriate file descriptors (e.g. as we do in closeDescriptors in |
simonis@6465 | 4228 | // UNIXProcess.c), and this in turn might: |
simonis@6465 | 4229 | // |
simonis@6465 | 4230 | // - cause end-of-file to fail to be detected on some file |
simonis@6465 | 4231 | // descriptors, resulting in mysterious hangs, or |
simonis@6465 | 4232 | // |
simonis@6465 | 4233 | // - might cause an fopen in the subprocess to fail on a system |
simonis@6465 | 4234 | // suffering from bug 1085341. |
simonis@6465 | 4235 | // |
simonis@6465 | 4236 | // (Yes, the default setting of the close-on-exec flag is a Unix |
simonis@6465 | 4237 | // design flaw.) |
simonis@6465 | 4238 | // |
simonis@6465 | 4239 | // See: |
simonis@6465 | 4240 | // 1085341: 32-bit stdio routines should support file descriptors >255 |
simonis@6465 | 4241 | // 4843136: (process) pipe file descriptor from Runtime.exec not being closed |
simonis@6465 | 4242 | // 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 |
simonis@6465 | 4243 | #ifdef FD_CLOEXEC |
simonis@6465 | 4244 | { |
simonis@6465 | 4245 | int flags = ::fcntl(fd, F_GETFD); |
simonis@6465 | 4246 | if (flags != -1) |
simonis@6465 | 4247 | ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); |
simonis@6465 | 4248 | } |
simonis@6465 | 4249 | #endif |
simonis@6465 | 4250 | |
simonis@6465 | 4251 | if (o_delete != 0) { |
simonis@6465 | 4252 | ::unlink(path); |
simonis@6465 | 4253 | } |
simonis@6465 | 4254 | return fd; |
simonis@6465 | 4255 | } |
simonis@6465 | 4256 | |
simonis@6465 | 4257 | |
simonis@6465 | 4258 | // create binary file, rewriting existing file if required |
simonis@6465 | 4259 | int os::create_binary_file(const char* path, bool rewrite_existing) { |
goetz@6501 | 4260 | int oflags = O_WRONLY | O_CREAT; |
goetz@6501 | 4261 | if (!rewrite_existing) { |
goetz@6501 | 4262 | oflags |= O_EXCL; |
goetz@6501 | 4263 | } |
goetz@6501 | 4264 | return ::open64(path, oflags, S_IREAD | S_IWRITE); |
simonis@6465 | 4265 | } |
simonis@6465 | 4266 | |
simonis@6465 | 4267 | // return current position of file pointer |
simonis@6465 | 4268 | jlong os::current_file_offset(int fd) { |
simonis@6465 | 4269 | return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); |
simonis@6465 | 4270 | } |
simonis@6465 | 4271 | |
simonis@6465 | 4272 | // move file pointer to the specified offset |
simonis@6465 | 4273 | jlong os::seek_to_file_offset(int fd, jlong offset) { |
simonis@6465 | 4274 | return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); |
simonis@6465 | 4275 | } |
simonis@6465 | 4276 | |
simonis@6465 | 4277 | // This code originates from JDK's sysAvailable |
simonis@6465 | 4278 | // from src/solaris/hpi/src/native_threads/src/sys_api_td.c |
simonis@6465 | 4279 | |
simonis@6465 | 4280 | int os::available(int fd, jlong *bytes) { |
simonis@6465 | 4281 | jlong cur, end; |
simonis@6465 | 4282 | int mode; |
simonis@6465 | 4283 | struct stat64 buf64; |
simonis@6465 | 4284 | |
simonis@6465 | 4285 | if (::fstat64(fd, &buf64) >= 0) { |
simonis@6465 | 4286 | mode = buf64.st_mode; |
simonis@6465 | 4287 | if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { |
simonis@6465 | 4288 | // XXX: is the following call interruptible? If so, this might |
simonis@6465 | 4289 | // need to go through the INTERRUPT_IO() wrapper as for other |
simonis@6465 | 4290 | // blocking, interruptible calls in this file. |
simonis@6465 | 4291 | int n; |
simonis@6465 | 4292 | if (::ioctl(fd, FIONREAD, &n) >= 0) { |
simonis@6465 | 4293 | *bytes = n; |
simonis@6465 | 4294 | return 1; |
simonis@6465 | 4295 | } |
simonis@6465 | 4296 | } |
simonis@6465 | 4297 | } |
simonis@6465 | 4298 | if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { |
simonis@6465 | 4299 | return 0; |
simonis@6465 | 4300 | } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) { |
simonis@6465 | 4301 | return 0; |
simonis@6465 | 4302 | } else if (::lseek64(fd, cur, SEEK_SET) == -1) { |
simonis@6465 | 4303 | return 0; |
simonis@6465 | 4304 | } |
simonis@6465 | 4305 | *bytes = end - cur; |
simonis@6465 | 4306 | return 1; |
simonis@6465 | 4307 | } |
simonis@6465 | 4308 | |
simonis@6465 | 4309 | int os::socket_available(int fd, jint *pbytes) { |
simonis@6465 | 4310 | // Linux doc says EINTR not returned, unlike Solaris |
simonis@6465 | 4311 | int ret = ::ioctl(fd, FIONREAD, pbytes); |
simonis@6465 | 4312 | |
simonis@6465 | 4313 | //%% note ioctl can return 0 when successful, JVM_SocketAvailable |
simonis@6465 | 4314 | // is expected to return 0 on failure and 1 on success to the jdk. |
simonis@6465 | 4315 | return (ret < 0) ? 0 : 1; |
simonis@6465 | 4316 | } |
simonis@6465 | 4317 | |
simonis@6465 | 4318 | // Map a block of memory. |
simonis@6465 | 4319 | char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, |
simonis@6465 | 4320 | char *addr, size_t bytes, bool read_only, |
simonis@6465 | 4321 | bool allow_exec) { |
simonis@6465 | 4322 | Unimplemented(); |
simonis@6465 | 4323 | return NULL; |
simonis@6465 | 4324 | } |
simonis@6465 | 4325 | |
simonis@6465 | 4326 | |
simonis@6465 | 4327 | // Remap a block of memory. |
simonis@6465 | 4328 | char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, |
simonis@6465 | 4329 | char *addr, size_t bytes, bool read_only, |
simonis@6465 | 4330 | bool allow_exec) { |
simonis@6465 | 4331 | // same as map_memory() on this OS |
simonis@6465 | 4332 | return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, |
simonis@6465 | 4333 | allow_exec); |
simonis@6465 | 4334 | } |
simonis@6465 | 4335 | |
simonis@6465 | 4336 | // Unmap a block of memory. |
simonis@6465 | 4337 | bool os::pd_unmap_memory(char* addr, size_t bytes) { |
simonis@6465 | 4338 | return munmap(addr, bytes) == 0; |
simonis@6465 | 4339 | } |
simonis@6465 | 4340 | |
simonis@6465 | 4341 | // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) |
simonis@6465 | 4342 | // are used by JVM M&M and JVMTI to get user+sys or user CPU time |
simonis@6465 | 4343 | // of a thread. |
simonis@6465 | 4344 | // |
simonis@6465 | 4345 | // current_thread_cpu_time() and thread_cpu_time(Thread*) returns |
simonis@6465 | 4346 | // the fast estimate available on the platform. |
simonis@6465 | 4347 | |
simonis@6465 | 4348 | jlong os::current_thread_cpu_time() { |
simonis@6465 | 4349 | // return user + sys since the cost is the same |
simonis@6465 | 4350 | const jlong n = os::thread_cpu_time(Thread::current(), true /* user + sys */); |
simonis@6465 | 4351 | assert(n >= 0, "negative CPU time"); |
simonis@6465 | 4352 | return n; |
simonis@6465 | 4353 | } |
simonis@6465 | 4354 | |
simonis@6465 | 4355 | jlong os::thread_cpu_time(Thread* thread) { |
simonis@6465 | 4356 | // consistent with what current_thread_cpu_time() returns |
simonis@6465 | 4357 | const jlong n = os::thread_cpu_time(thread, true /* user + sys */); |
simonis@6465 | 4358 | assert(n >= 0, "negative CPU time"); |
simonis@6465 | 4359 | return n; |
simonis@6465 | 4360 | } |
simonis@6465 | 4361 | |
simonis@6465 | 4362 | jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { |
simonis@6465 | 4363 | const jlong n = os::thread_cpu_time(Thread::current(), user_sys_cpu_time); |
simonis@6465 | 4364 | assert(n >= 0, "negative CPU time"); |
simonis@6465 | 4365 | return n; |
simonis@6465 | 4366 | } |
simonis@6465 | 4367 | |
simonis@6465 | 4368 | static bool thread_cpu_time_unchecked(Thread* thread, jlong* p_sys_time, jlong* p_user_time) { |
simonis@6465 | 4369 | bool error = false; |
simonis@6465 | 4370 | |
simonis@6465 | 4371 | jlong sys_time = 0; |
simonis@6465 | 4372 | jlong user_time = 0; |
simonis@6465 | 4373 | |
simonis@6465 | 4374 | // reimplemented using getthrds64(). |
simonis@6465 | 4375 | // |
simonis@6465 | 4376 | // goes like this: |
simonis@6465 | 4377 | // For the thread in question, get the kernel thread id. Then get the |
simonis@6465 | 4378 | // kernel thread statistics using that id. |
simonis@6465 | 4379 | // |
simonis@6465 | 4380 | // This only works of course when no pthread scheduling is used, |
simonis@6465 | 4381 | // ie there is a 1:1 relationship to kernel threads. |
simonis@6465 | 4382 | // On AIX, see AIXTHREAD_SCOPE variable. |
simonis@6465 | 4383 | |
simonis@6465 | 4384 | pthread_t pthtid = thread->osthread()->pthread_id(); |
simonis@6465 | 4385 | |
simonis@6465 | 4386 | // retrieve kernel thread id for the pthread: |
simonis@6465 | 4387 | tid64_t tid = 0; |
simonis@6465 | 4388 | struct __pthrdsinfo pinfo; |
simonis@6465 | 4389 | // I just love those otherworldly IBM APIs which force me to hand down |
simonis@6465 | 4390 | // dummy buffers for stuff I dont care for... |
simonis@6465 | 4391 | char dummy[1]; |
simonis@6465 | 4392 | int dummy_size = sizeof(dummy); |
simonis@6465 | 4393 | if (pthread_getthrds_np(&pthtid, PTHRDSINFO_QUERY_TID, &pinfo, sizeof(pinfo), |
simonis@6465 | 4394 | dummy, &dummy_size) == 0) { |
simonis@6465 | 4395 | tid = pinfo.__pi_tid; |
simonis@6465 | 4396 | } else { |
simonis@6465 | 4397 | tty->print_cr("pthread_getthrds_np failed."); |
simonis@6465 | 4398 | error = true; |
simonis@6465 | 4399 | } |
simonis@6465 | 4400 | |
simonis@6465 | 4401 | // retrieve kernel timing info for that kernel thread |
simonis@6465 | 4402 | if (!error) { |
simonis@6465 | 4403 | struct thrdentry64 thrdentry; |
simonis@6465 | 4404 | if (getthrds64(getpid(), &thrdentry, sizeof(thrdentry), &tid, 1) == 1) { |
simonis@6465 | 4405 | sys_time = thrdentry.ti_ru.ru_stime.tv_sec * 1000000000LL + thrdentry.ti_ru.ru_stime.tv_usec * 1000LL; |
simonis@6465 | 4406 | user_time = thrdentry.ti_ru.ru_utime.tv_sec * 1000000000LL + thrdentry.ti_ru.ru_utime.tv_usec * 1000LL; |
simonis@6465 | 4407 | } else { |
simonis@6465 | 4408 | tty->print_cr("pthread_getthrds_np failed."); |
simonis@6465 | 4409 | error = true; |
simonis@6465 | 4410 | } |
simonis@6465 | 4411 | } |
simonis@6465 | 4412 | |
simonis@6465 | 4413 | if (p_sys_time) { |
simonis@6465 | 4414 | *p_sys_time = sys_time; |
simonis@6465 | 4415 | } |
simonis@6465 | 4416 | |
simonis@6465 | 4417 | if (p_user_time) { |
simonis@6465 | 4418 | *p_user_time = user_time; |
simonis@6465 | 4419 | } |
simonis@6465 | 4420 | |
simonis@6465 | 4421 | if (error) { |
simonis@6465 | 4422 | return false; |
simonis@6465 | 4423 | } |
simonis@6465 | 4424 | |
simonis@6465 | 4425 | return true; |
simonis@6465 | 4426 | } |
simonis@6465 | 4427 | |
simonis@6465 | 4428 | jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { |
simonis@6465 | 4429 | jlong sys_time; |
simonis@6465 | 4430 | jlong user_time; |
simonis@6465 | 4431 | |
simonis@6465 | 4432 | if (!thread_cpu_time_unchecked(thread, &sys_time, &user_time)) { |
simonis@6465 | 4433 | return -1; |
simonis@6465 | 4434 | } |
simonis@6465 | 4435 | |
simonis@6465 | 4436 | return user_sys_cpu_time ? sys_time + user_time : user_time; |
simonis@6465 | 4437 | } |
simonis@6465 | 4438 | |
simonis@6465 | 4439 | void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { |
simonis@6465 | 4440 | info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits |
simonis@6465 | 4441 | info_ptr->may_skip_backward = false; // elapsed time not wall time |
simonis@6465 | 4442 | info_ptr->may_skip_forward = false; // elapsed time not wall time |
simonis@6465 | 4443 | info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned |
simonis@6465 | 4444 | } |
simonis@6465 | 4445 | |
simonis@6465 | 4446 | void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { |
simonis@6465 | 4447 | info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits |
simonis@6465 | 4448 | info_ptr->may_skip_backward = false; // elapsed time not wall time |
simonis@6465 | 4449 | info_ptr->may_skip_forward = false; // elapsed time not wall time |
simonis@6465 | 4450 | info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned |
simonis@6465 | 4451 | } |
simonis@6465 | 4452 | |
simonis@6465 | 4453 | bool os::is_thread_cpu_time_supported() { |
simonis@6465 | 4454 | return true; |
simonis@6465 | 4455 | } |
simonis@6465 | 4456 | |
simonis@6465 | 4457 | // System loadavg support. Returns -1 if load average cannot be obtained. |
simonis@6465 | 4458 | // For now just return the system wide load average (no processor sets). |
simonis@6465 | 4459 | int os::loadavg(double values[], int nelem) { |
simonis@6465 | 4460 | |
simonis@6465 | 4461 | // Implemented using libperfstat on AIX. |
simonis@6465 | 4462 | |
simonis@6465 | 4463 | guarantee(nelem >= 0 && nelem <= 3, "argument error"); |
simonis@6465 | 4464 | guarantee(values, "argument error"); |
simonis@6465 | 4465 | |
simonis@6465 | 4466 | if (os::Aix::on_pase()) { |
simonis@6465 | 4467 | Unimplemented(); |
simonis@6465 | 4468 | return -1; |
simonis@6465 | 4469 | } else { |
simonis@6465 | 4470 | // AIX: use libperfstat |
simonis@6465 | 4471 | // |
simonis@6465 | 4472 | // See also: |
simonis@6465 | 4473 | // http://publib.boulder.ibm.com/infocenter/pseries/v5r3/index.jsp?topic=/com.ibm.aix.basetechref/doc/basetrf1/perfstat_cputot.htm |
simonis@6465 | 4474 | // /usr/include/libperfstat.h: |
simonis@6465 | 4475 | |
simonis@6465 | 4476 | // Use the already AIX version independent get_cpuinfo. |
simonis@6465 | 4477 | os::Aix::cpuinfo_t ci; |
simonis@6465 | 4478 | if (os::Aix::get_cpuinfo(&ci)) { |
simonis@6465 | 4479 | for (int i = 0; i < nelem; i++) { |
simonis@6465 | 4480 | values[i] = ci.loadavg[i]; |
simonis@6465 | 4481 | } |
simonis@6465 | 4482 | } else { |
simonis@6465 | 4483 | return -1; |
simonis@6465 | 4484 | } |
simonis@6465 | 4485 | return nelem; |
simonis@6465 | 4486 | } |
simonis@6465 | 4487 | } |
simonis@6465 | 4488 | |
simonis@6465 | 4489 | void os::pause() { |
simonis@6465 | 4490 | char filename[MAX_PATH]; |
simonis@6465 | 4491 | if (PauseAtStartupFile && PauseAtStartupFile[0]) { |
simonis@6465 | 4492 | jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); |
simonis@6465 | 4493 | } else { |
simonis@6465 | 4494 | jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); |
simonis@6465 | 4495 | } |
simonis@6465 | 4496 | |
simonis@6465 | 4497 | int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); |
simonis@6465 | 4498 | if (fd != -1) { |
simonis@6465 | 4499 | struct stat buf; |
simonis@6465 | 4500 | ::close(fd); |
simonis@6465 | 4501 | while (::stat(filename, &buf) == 0) { |
simonis@6465 | 4502 | (void)::poll(NULL, 0, 100); |
simonis@6465 | 4503 | } |
simonis@6465 | 4504 | } else { |
simonis@6465 | 4505 | jio_fprintf(stderr, |
simonis@6465 | 4506 | "Could not open pause file '%s', continuing immediately.\n", filename); |
simonis@6465 | 4507 | } |
simonis@6465 | 4508 | } |
simonis@6465 | 4509 | |
simonis@6465 | 4510 | bool os::Aix::is_primordial_thread() { |
simonis@6465 | 4511 | if (pthread_self() == (pthread_t)1) { |
simonis@6465 | 4512 | return true; |
simonis@6465 | 4513 | } else { |
simonis@6465 | 4514 | return false; |
simonis@6465 | 4515 | } |
simonis@6465 | 4516 | } |
simonis@6465 | 4517 | |
simonis@6465 | 4518 | // OS recognitions (PASE/AIX, OS level) call this before calling any |
simonis@6465 | 4519 | // one of Aix::on_pase(), Aix::os_version() static |
simonis@6465 | 4520 | void os::Aix::initialize_os_info() { |
simonis@6465 | 4521 | |
simonis@6465 | 4522 | assert(_on_pase == -1 && _os_version == -1, "already called."); |
simonis@6465 | 4523 | |
simonis@6465 | 4524 | struct utsname uts; |
simonis@6465 | 4525 | memset(&uts, 0, sizeof(uts)); |
simonis@6465 | 4526 | strcpy(uts.sysname, "?"); |
simonis@6465 | 4527 | if (::uname(&uts) == -1) { |
simonis@6465 | 4528 | fprintf(stderr, "uname failed (%d)\n", errno); |
simonis@6465 | 4529 | guarantee(0, "Could not determine whether we run on AIX or PASE"); |
simonis@6465 | 4530 | } else { |
simonis@6465 | 4531 | if (Verbose) { |
simonis@6465 | 4532 | fprintf(stderr,"uname says: sysname \"%s\" version \"%s\" release \"%s\" " |
simonis@6465 | 4533 | "node \"%s\" machine \"%s\"\n", |
simonis@6465 | 4534 | uts.sysname, uts.version, uts.release, uts.nodename, uts.machine); |
simonis@6465 | 4535 | } |
simonis@6465 | 4536 | const int major = atoi(uts.version); |
simonis@6465 | 4537 | assert(major > 0, "invalid OS version"); |
simonis@6465 | 4538 | const int minor = atoi(uts.release); |
simonis@6465 | 4539 | assert(minor > 0, "invalid OS release"); |
simonis@6465 | 4540 | _os_version = (major << 8) | minor; |
simonis@6465 | 4541 | if (strcmp(uts.sysname, "OS400") == 0) { |
simonis@6465 | 4542 | Unimplemented(); |
simonis@6465 | 4543 | } else if (strcmp(uts.sysname, "AIX") == 0) { |
simonis@6465 | 4544 | // We run on AIX. We do not support versions older than AIX 5.3. |
simonis@6465 | 4545 | _on_pase = 0; |
simonis@6465 | 4546 | if (_os_version < 0x0503) { |
simonis@6465 | 4547 | fprintf(stderr, "AIX release older than AIX 5.3 not supported.\n"); |
simonis@6465 | 4548 | assert(false, "AIX release too old."); |
simonis@6465 | 4549 | } else { |
simonis@6465 | 4550 | if (Verbose) { |
simonis@6465 | 4551 | fprintf(stderr, "We run on AIX %d.%d\n", major, minor); |
simonis@6465 | 4552 | } |
simonis@6465 | 4553 | } |
simonis@6465 | 4554 | } else { |
simonis@6465 | 4555 | assert(false, "unknown OS"); |
simonis@6465 | 4556 | } |
simonis@6465 | 4557 | } |
simonis@6465 | 4558 | |
simonis@6465 | 4559 | guarantee(_on_pase != -1 && _os_version, "Could not determine AIX/OS400 release"); |
simonis@6465 | 4560 | |
simonis@6465 | 4561 | } // end: os::Aix::initialize_os_info() |
simonis@6465 | 4562 | |
simonis@6465 | 4563 | // Scan environment for important settings which might effect the VM. |
simonis@6465 | 4564 | // Trace out settings. Warn about invalid settings and/or correct them. |
simonis@6465 | 4565 | // |
simonis@6465 | 4566 | // Must run after os::Aix::initialue_os_info(). |
simonis@6465 | 4567 | void os::Aix::scan_environment() { |
simonis@6465 | 4568 | |
simonis@6465 | 4569 | char* p; |
simonis@6465 | 4570 | int rc; |
simonis@6465 | 4571 | |
simonis@6465 | 4572 | // Warn explicity if EXTSHM=ON is used. That switch changes how |
simonis@6465 | 4573 | // System V shared memory behaves. One effect is that page size of |
simonis@6465 | 4574 | // shared memory cannot be change dynamically, effectivly preventing |
simonis@6465 | 4575 | // large pages from working. |
simonis@6465 | 4576 | // This switch was needed on AIX 32bit, but on AIX 64bit the general |
simonis@6465 | 4577 | // recommendation is (in OSS notes) to switch it off. |
simonis@6465 | 4578 | p = ::getenv("EXTSHM"); |
simonis@6465 | 4579 | if (Verbose) { |
simonis@6465 | 4580 | fprintf(stderr, "EXTSHM=%s.\n", p ? p : "<unset>"); |
simonis@6465 | 4581 | } |
simonis@6465 | 4582 | if (p && strcmp(p, "ON") == 0) { |
simonis@6465 | 4583 | fprintf(stderr, "Unsupported setting: EXTSHM=ON. Large Page support will be disabled.\n"); |
simonis@6465 | 4584 | _extshm = 1; |
simonis@6465 | 4585 | } else { |
simonis@6465 | 4586 | _extshm = 0; |
simonis@6465 | 4587 | } |
simonis@6465 | 4588 | |
simonis@6465 | 4589 | // SPEC1170 behaviour: will change the behaviour of a number of POSIX APIs. |
simonis@6465 | 4590 | // Not tested, not supported. |
simonis@6465 | 4591 | // |
simonis@6465 | 4592 | // Note that it might be worth the trouble to test and to require it, if only to |
simonis@6465 | 4593 | // get useful return codes for mprotect. |
simonis@6465 | 4594 | // |
simonis@6465 | 4595 | // Note: Setting XPG_SUS_ENV in the process is too late. Must be set earlier (before |
simonis@6465 | 4596 | // exec() ? before loading the libjvm ? ....) |
simonis@6465 | 4597 | p = ::getenv("XPG_SUS_ENV"); |
simonis@6465 | 4598 | if (Verbose) { |
simonis@6465 | 4599 | fprintf(stderr, "XPG_SUS_ENV=%s.\n", p ? p : "<unset>"); |
simonis@6465 | 4600 | } |
simonis@6465 | 4601 | if (p && strcmp(p, "ON") == 0) { |
simonis@6465 | 4602 | _xpg_sus_mode = 1; |
simonis@6465 | 4603 | fprintf(stderr, "Unsupported setting: XPG_SUS_ENV=ON\n"); |
simonis@6465 | 4604 | // This is not supported. Worst of all, it changes behaviour of mmap MAP_FIXED to |
simonis@6465 | 4605 | // clobber address ranges. If we ever want to support that, we have to do some |
simonis@6465 | 4606 | // testing first. |
simonis@6465 | 4607 | guarantee(false, "XPG_SUS_ENV=ON not supported"); |
simonis@6465 | 4608 | } else { |
simonis@6465 | 4609 | _xpg_sus_mode = 0; |
simonis@6465 | 4610 | } |
simonis@6465 | 4611 | |
simonis@6465 | 4612 | // Switch off AIX internal (pthread) guard pages. This has |
simonis@6465 | 4613 | // immediate effect for any pthread_create calls which follow. |
simonis@6465 | 4614 | p = ::getenv("AIXTHREAD_GUARDPAGES"); |
simonis@6465 | 4615 | if (Verbose) { |
simonis@6465 | 4616 | fprintf(stderr, "AIXTHREAD_GUARDPAGES=%s.\n", p ? p : "<unset>"); |
simonis@6465 | 4617 | fprintf(stderr, "setting AIXTHREAD_GUARDPAGES=0.\n"); |
simonis@6465 | 4618 | } |
simonis@6465 | 4619 | rc = ::putenv("AIXTHREAD_GUARDPAGES=0"); |
simonis@6465 | 4620 | guarantee(rc == 0, ""); |
simonis@6465 | 4621 | |
simonis@6465 | 4622 | } // end: os::Aix::scan_environment() |
simonis@6465 | 4623 | |
simonis@6465 | 4624 | // PASE: initialize the libo4 library (AS400 PASE porting library). |
simonis@6465 | 4625 | void os::Aix::initialize_libo4() { |
simonis@6465 | 4626 | Unimplemented(); |
simonis@6465 | 4627 | } |
simonis@6465 | 4628 | |
simonis@6465 | 4629 | // AIX: initialize the libperfstat library (we load this dynamically |
simonis@6465 | 4630 | // because it is only available on AIX. |
simonis@6465 | 4631 | void os::Aix::initialize_libperfstat() { |
simonis@6465 | 4632 | |
simonis@6465 | 4633 | assert(os::Aix::on_aix(), "AIX only"); |
simonis@6465 | 4634 | |
simonis@6465 | 4635 | if (!libperfstat::init()) { |
simonis@6465 | 4636 | fprintf(stderr, "libperfstat initialization failed.\n"); |
simonis@6465 | 4637 | assert(false, "libperfstat initialization failed"); |
simonis@6465 | 4638 | } else { |
simonis@6465 | 4639 | if (Verbose) { |
simonis@6465 | 4640 | fprintf(stderr, "libperfstat initialized.\n"); |
simonis@6465 | 4641 | } |
simonis@6465 | 4642 | } |
simonis@6465 | 4643 | } // end: os::Aix::initialize_libperfstat |
simonis@6465 | 4644 | |
simonis@6465 | 4645 | ///////////////////////////////////////////////////////////////////////////// |
simonis@6465 | 4646 | // thread stack |
simonis@6465 | 4647 | |
simonis@6465 | 4648 | // function to query the current stack size using pthread_getthrds_np |
simonis@6465 | 4649 | // |
simonis@6465 | 4650 | // ! do not change anything here unless you know what you are doing ! |
simonis@6465 | 4651 | static void query_stack_dimensions(address* p_stack_base, size_t* p_stack_size) { |
simonis@6465 | 4652 | |
simonis@6465 | 4653 | // This only works when invoked on a pthread. As we agreed not to use |
simonis@6465 | 4654 | // primordial threads anyway, I assert here |
simonis@6465 | 4655 | guarantee(!os::Aix::is_primordial_thread(), "not allowed on the primordial thread"); |
simonis@6465 | 4656 | |
simonis@6465 | 4657 | // information about this api can be found (a) in the pthread.h header and |
simonis@6465 | 4658 | // (b) in http://publib.boulder.ibm.com/infocenter/pseries/v5r3/index.jsp?topic=/com.ibm.aix.basetechref/doc/basetrf1/pthread_getthrds_np.htm |
simonis@6465 | 4659 | // |
simonis@6465 | 4660 | // The use of this API to find out the current stack is kind of undefined. |
simonis@6465 | 4661 | // But after a lot of tries and asking IBM about it, I concluded that it is safe |
simonis@6465 | 4662 | // enough for cases where I let the pthread library create its stacks. For cases |
simonis@6465 | 4663 | // where I create an own stack and pass this to pthread_create, it seems not to |
simonis@6465 | 4664 | // work (the returned stack size in that case is 0). |
simonis@6465 | 4665 | |
simonis@6465 | 4666 | pthread_t tid = pthread_self(); |
simonis@6465 | 4667 | struct __pthrdsinfo pinfo; |
simonis@6465 | 4668 | char dummy[1]; // we only need this to satisfy the api and to not get E |
simonis@6465 | 4669 | int dummy_size = sizeof(dummy); |
simonis@6465 | 4670 | |
simonis@6465 | 4671 | memset(&pinfo, 0, sizeof(pinfo)); |
simonis@6465 | 4672 | |
simonis@6465 | 4673 | const int rc = pthread_getthrds_np (&tid, PTHRDSINFO_QUERY_ALL, &pinfo, |
simonis@6465 | 4674 | sizeof(pinfo), dummy, &dummy_size); |
simonis@6465 | 4675 | |
simonis@6465 | 4676 | if (rc != 0) { |
simonis@6465 | 4677 | fprintf(stderr, "pthread_getthrds_np failed (%d)\n", rc); |
simonis@6465 | 4678 | guarantee(0, "pthread_getthrds_np failed"); |
simonis@6465 | 4679 | } |
simonis@6465 | 4680 | |
simonis@6465 | 4681 | guarantee(pinfo.__pi_stackend, "returned stack base invalid"); |
simonis@6465 | 4682 | |
simonis@6465 | 4683 | // the following can happen when invoking pthread_getthrds_np on a pthread running on a user provided stack |
simonis@6465 | 4684 | // (when handing down a stack to pthread create, see pthread_attr_setstackaddr). |
simonis@6465 | 4685 | // Not sure what to do here - I feel inclined to forbid this use case completely. |
simonis@6465 | 4686 | guarantee(pinfo.__pi_stacksize, "returned stack size invalid"); |
simonis@6465 | 4687 | |
simonis@6465 | 4688 | // On AIX, stacks are not necessarily page aligned so round the base and size accordingly |
simonis@6465 | 4689 | if (p_stack_base) { |
simonis@6465 | 4690 | (*p_stack_base) = (address) align_size_up((intptr_t)pinfo.__pi_stackend, os::Aix::stack_page_size()); |
simonis@6465 | 4691 | } |
simonis@6465 | 4692 | |
simonis@6465 | 4693 | if (p_stack_size) { |
simonis@6465 | 4694 | (*p_stack_size) = pinfo.__pi_stacksize - os::Aix::stack_page_size(); |
simonis@6465 | 4695 | } |
simonis@6465 | 4696 | |
simonis@6465 | 4697 | #ifndef PRODUCT |
simonis@6465 | 4698 | if (Verbose) { |
simonis@6465 | 4699 | fprintf(stderr, |
simonis@6465 | 4700 | "query_stack_dimensions() -> real stack_base=" INTPTR_FORMAT ", real stack_addr=" INTPTR_FORMAT |
simonis@6465 | 4701 | ", real stack_size=" INTPTR_FORMAT |
simonis@6465 | 4702 | ", stack_base=" INTPTR_FORMAT ", stack_size=" INTPTR_FORMAT "\n", |
simonis@6465 | 4703 | (intptr_t)pinfo.__pi_stackend, (intptr_t)pinfo.__pi_stackaddr, pinfo.__pi_stacksize, |
simonis@6465 | 4704 | (intptr_t)align_size_up((intptr_t)pinfo.__pi_stackend, os::Aix::stack_page_size()), |
simonis@6465 | 4705 | pinfo.__pi_stacksize - os::Aix::stack_page_size()); |
simonis@6465 | 4706 | } |
simonis@6465 | 4707 | #endif |
simonis@6465 | 4708 | |
simonis@6465 | 4709 | } // end query_stack_dimensions |
simonis@6465 | 4710 | |
simonis@6465 | 4711 | // get the current stack base from the OS (actually, the pthread library) |
simonis@6465 | 4712 | address os::current_stack_base() { |
simonis@6465 | 4713 | address p; |
simonis@6465 | 4714 | query_stack_dimensions(&p, 0); |
simonis@6465 | 4715 | return p; |
simonis@6465 | 4716 | } |
simonis@6465 | 4717 | |
simonis@6465 | 4718 | // get the current stack size from the OS (actually, the pthread library) |
simonis@6465 | 4719 | size_t os::current_stack_size() { |
simonis@6465 | 4720 | size_t s; |
simonis@6465 | 4721 | query_stack_dimensions(0, &s); |
simonis@6465 | 4722 | return s; |
simonis@6465 | 4723 | } |
simonis@6465 | 4724 | |
simonis@6465 | 4725 | // Refer to the comments in os_solaris.cpp park-unpark. |
simonis@6465 | 4726 | // |
simonis@6465 | 4727 | // Beware -- Some versions of NPTL embody a flaw where pthread_cond_timedwait() can |
simonis@6465 | 4728 | // hang indefinitely. For instance NPTL 0.60 on 2.4.21-4ELsmp is vulnerable. |
simonis@6465 | 4729 | // For specifics regarding the bug see GLIBC BUGID 261237 : |
simonis@6465 | 4730 | // http://www.mail-archive.com/debian-glibc@lists.debian.org/msg10837.html. |
simonis@6465 | 4731 | // Briefly, pthread_cond_timedwait() calls with an expiry time that's not in the future |
simonis@6465 | 4732 | // will either hang or corrupt the condvar, resulting in subsequent hangs if the condvar |
simonis@6465 | 4733 | // is used. (The simple C test-case provided in the GLIBC bug report manifests the |
simonis@6465 | 4734 | // hang). The JVM is vulernable via sleep(), Object.wait(timo), LockSupport.parkNanos() |
simonis@6465 | 4735 | // and monitorenter when we're using 1-0 locking. All those operations may result in |
simonis@6465 | 4736 | // calls to pthread_cond_timedwait(). Using LD_ASSUME_KERNEL to use an older version |
simonis@6465 | 4737 | // of libpthread avoids the problem, but isn't practical. |
simonis@6465 | 4738 | // |
simonis@6465 | 4739 | // Possible remedies: |
simonis@6465 | 4740 | // |
simonis@6465 | 4741 | // 1. Establish a minimum relative wait time. 50 to 100 msecs seems to work. |
simonis@6465 | 4742 | // This is palliative and probabilistic, however. If the thread is preempted |
simonis@6465 | 4743 | // between the call to compute_abstime() and pthread_cond_timedwait(), more |
simonis@6465 | 4744 | // than the minimum period may have passed, and the abstime may be stale (in the |
simonis@6465 | 4745 | // past) resultin in a hang. Using this technique reduces the odds of a hang |
simonis@6465 | 4746 | // but the JVM is still vulnerable, particularly on heavily loaded systems. |
simonis@6465 | 4747 | // |
simonis@6465 | 4748 | // 2. Modify park-unpark to use per-thread (per ParkEvent) pipe-pairs instead |
simonis@6465 | 4749 | // of the usual flag-condvar-mutex idiom. The write side of the pipe is set |
simonis@6465 | 4750 | // NDELAY. unpark() reduces to write(), park() reduces to read() and park(timo) |
simonis@6465 | 4751 | // reduces to poll()+read(). This works well, but consumes 2 FDs per extant |
simonis@6465 | 4752 | // thread. |
simonis@6465 | 4753 | // |
simonis@6465 | 4754 | // 3. Embargo pthread_cond_timedwait() and implement a native "chron" thread |
simonis@6465 | 4755 | // that manages timeouts. We'd emulate pthread_cond_timedwait() by enqueuing |
simonis@6465 | 4756 | // a timeout request to the chron thread and then blocking via pthread_cond_wait(). |
simonis@6465 | 4757 | // This also works well. In fact it avoids kernel-level scalability impediments |
simonis@6465 | 4758 | // on certain platforms that don't handle lots of active pthread_cond_timedwait() |
simonis@6465 | 4759 | // timers in a graceful fashion. |
simonis@6465 | 4760 | // |
simonis@6465 | 4761 | // 4. When the abstime value is in the past it appears that control returns |
simonis@6465 | 4762 | // correctly from pthread_cond_timedwait(), but the condvar is left corrupt. |
simonis@6465 | 4763 | // Subsequent timedwait/wait calls may hang indefinitely. Given that, we |
simonis@6465 | 4764 | // can avoid the problem by reinitializing the condvar -- by cond_destroy() |
simonis@6465 | 4765 | // followed by cond_init() -- after all calls to pthread_cond_timedwait(). |
simonis@6465 | 4766 | // It may be possible to avoid reinitialization by checking the return |
simonis@6465 | 4767 | // value from pthread_cond_timedwait(). In addition to reinitializing the |
simonis@6465 | 4768 | // condvar we must establish the invariant that cond_signal() is only called |
simonis@6465 | 4769 | // within critical sections protected by the adjunct mutex. This prevents |
simonis@6465 | 4770 | // cond_signal() from "seeing" a condvar that's in the midst of being |
simonis@6465 | 4771 | // reinitialized or that is corrupt. Sadly, this invariant obviates the |
simonis@6465 | 4772 | // desirable signal-after-unlock optimization that avoids futile context switching. |
simonis@6465 | 4773 | // |
simonis@6465 | 4774 | // I'm also concerned that some versions of NTPL might allocate an auxilliary |
simonis@6465 | 4775 | // structure when a condvar is used or initialized. cond_destroy() would |
simonis@6465 | 4776 | // release the helper structure. Our reinitialize-after-timedwait fix |
simonis@6465 | 4777 | // put excessive stress on malloc/free and locks protecting the c-heap. |
simonis@6465 | 4778 | // |
simonis@6465 | 4779 | // We currently use (4). See the WorkAroundNTPLTimedWaitHang flag. |
simonis@6465 | 4780 | // It may be possible to refine (4) by checking the kernel and NTPL verisons |
simonis@6465 | 4781 | // and only enabling the work-around for vulnerable environments. |
simonis@6465 | 4782 | |
simonis@6465 | 4783 | // utility to compute the abstime argument to timedwait: |
simonis@6465 | 4784 | // millis is the relative timeout time |
simonis@6465 | 4785 | // abstime will be the absolute timeout time |
simonis@6465 | 4786 | // TODO: replace compute_abstime() with unpackTime() |
simonis@6465 | 4787 | |
simonis@6465 | 4788 | static struct timespec* compute_abstime(timespec* abstime, jlong millis) { |
simonis@6465 | 4789 | if (millis < 0) millis = 0; |
simonis@6465 | 4790 | struct timeval now; |
simonis@6465 | 4791 | int status = gettimeofday(&now, NULL); |
simonis@6465 | 4792 | assert(status == 0, "gettimeofday"); |
simonis@6465 | 4793 | jlong seconds = millis / 1000; |
simonis@6465 | 4794 | millis %= 1000; |
simonis@6465 | 4795 | if (seconds > 50000000) { // see man cond_timedwait(3T) |
simonis@6465 | 4796 | seconds = 50000000; |
simonis@6465 | 4797 | } |
simonis@6465 | 4798 | abstime->tv_sec = now.tv_sec + seconds; |
simonis@6465 | 4799 | long usec = now.tv_usec + millis * 1000; |
simonis@6465 | 4800 | if (usec >= 1000000) { |
simonis@6465 | 4801 | abstime->tv_sec += 1; |
simonis@6465 | 4802 | usec -= 1000000; |
simonis@6465 | 4803 | } |
simonis@6465 | 4804 | abstime->tv_nsec = usec * 1000; |
simonis@6465 | 4805 | return abstime; |
simonis@6465 | 4806 | } |
simonis@6465 | 4807 | |
simonis@6465 | 4808 | |
simonis@6465 | 4809 | // Test-and-clear _Event, always leaves _Event set to 0, returns immediately. |
simonis@6465 | 4810 | // Conceptually TryPark() should be equivalent to park(0). |
simonis@6465 | 4811 | |
simonis@6465 | 4812 | int os::PlatformEvent::TryPark() { |
simonis@6465 | 4813 | for (;;) { |
simonis@6465 | 4814 | const int v = _Event; |
simonis@6465 | 4815 | guarantee ((v == 0) || (v == 1), "invariant"); |
simonis@6465 | 4816 | if (Atomic::cmpxchg (0, &_Event, v) == v) return v; |
simonis@6465 | 4817 | } |
simonis@6465 | 4818 | } |
simonis@6465 | 4819 | |
simonis@6465 | 4820 | void os::PlatformEvent::park() { // AKA "down()" |
simonis@6465 | 4821 | // Invariant: Only the thread associated with the Event/PlatformEvent |
simonis@6465 | 4822 | // may call park(). |
simonis@6465 | 4823 | // TODO: assert that _Assoc != NULL or _Assoc == Self |
simonis@6465 | 4824 | int v; |
simonis@6465 | 4825 | for (;;) { |
simonis@6465 | 4826 | v = _Event; |
simonis@6465 | 4827 | if (Atomic::cmpxchg (v-1, &_Event, v) == v) break; |
simonis@6465 | 4828 | } |
simonis@6465 | 4829 | guarantee (v >= 0, "invariant"); |
simonis@6465 | 4830 | if (v == 0) { |
simonis@6465 | 4831 | // Do this the hard way by blocking ... |
simonis@6465 | 4832 | int status = pthread_mutex_lock(_mutex); |
simonis@6465 | 4833 | assert_status(status == 0, status, "mutex_lock"); |
simonis@6465 | 4834 | guarantee (_nParked == 0, "invariant"); |
simonis@6465 | 4835 | ++ _nParked; |
simonis@6465 | 4836 | while (_Event < 0) { |
simonis@6465 | 4837 | status = pthread_cond_wait(_cond, _mutex); |
simonis@6465 | 4838 | assert_status(status == 0 || status == ETIMEDOUT, status, "cond_timedwait"); |
simonis@6465 | 4839 | } |
simonis@6465 | 4840 | -- _nParked; |
simonis@6465 | 4841 | |
simonis@6465 | 4842 | // In theory we could move the ST of 0 into _Event past the unlock(), |
simonis@6465 | 4843 | // but then we'd need a MEMBAR after the ST. |
simonis@6465 | 4844 | _Event = 0; |
simonis@6465 | 4845 | status = pthread_mutex_unlock(_mutex); |
simonis@6465 | 4846 | assert_status(status == 0, status, "mutex_unlock"); |
simonis@6465 | 4847 | } |
simonis@6465 | 4848 | guarantee (_Event >= 0, "invariant"); |
simonis@6465 | 4849 | } |
simonis@6465 | 4850 | |
simonis@6465 | 4851 | int os::PlatformEvent::park(jlong millis) { |
simonis@6465 | 4852 | guarantee (_nParked == 0, "invariant"); |
simonis@6465 | 4853 | |
simonis@6465 | 4854 | int v; |
simonis@6465 | 4855 | for (;;) { |
simonis@6465 | 4856 | v = _Event; |
simonis@6465 | 4857 | if (Atomic::cmpxchg (v-1, &_Event, v) == v) break; |
simonis@6465 | 4858 | } |
simonis@6465 | 4859 | guarantee (v >= 0, "invariant"); |
simonis@6465 | 4860 | if (v != 0) return OS_OK; |
simonis@6465 | 4861 | |
simonis@6465 | 4862 | // We do this the hard way, by blocking the thread. |
simonis@6465 | 4863 | // Consider enforcing a minimum timeout value. |
simonis@6465 | 4864 | struct timespec abst; |
simonis@6465 | 4865 | compute_abstime(&abst, millis); |
simonis@6465 | 4866 | |
simonis@6465 | 4867 | int ret = OS_TIMEOUT; |
simonis@6465 | 4868 | int status = pthread_mutex_lock(_mutex); |
simonis@6465 | 4869 | assert_status(status == 0, status, "mutex_lock"); |
simonis@6465 | 4870 | guarantee (_nParked == 0, "invariant"); |
simonis@6465 | 4871 | ++_nParked; |
simonis@6465 | 4872 | |
simonis@6465 | 4873 | // Object.wait(timo) will return because of |
simonis@6465 | 4874 | // (a) notification |
simonis@6465 | 4875 | // (b) timeout |
simonis@6465 | 4876 | // (c) thread.interrupt |
simonis@6465 | 4877 | // |
simonis@6465 | 4878 | // Thread.interrupt and object.notify{All} both call Event::set. |
simonis@6465 | 4879 | // That is, we treat thread.interrupt as a special case of notification. |
simonis@6465 | 4880 | // The underlying Solaris implementation, cond_timedwait, admits |
simonis@6465 | 4881 | // spurious/premature wakeups, but the JLS/JVM spec prevents the |
simonis@6465 | 4882 | // JVM from making those visible to Java code. As such, we must |
simonis@6465 | 4883 | // filter out spurious wakeups. We assume all ETIME returns are valid. |
simonis@6465 | 4884 | // |
simonis@6465 | 4885 | // TODO: properly differentiate simultaneous notify+interrupt. |
simonis@6465 | 4886 | // In that case, we should propagate the notify to another waiter. |
simonis@6465 | 4887 | |
simonis@6465 | 4888 | while (_Event < 0) { |
simonis@6465 | 4889 | status = pthread_cond_timedwait(_cond, _mutex, &abst); |
simonis@6465 | 4890 | assert_status(status == 0 || status == ETIMEDOUT, |
simonis@6465 | 4891 | status, "cond_timedwait"); |
simonis@6465 | 4892 | if (!FilterSpuriousWakeups) break; // previous semantics |
simonis@6465 | 4893 | if (status == ETIMEDOUT) break; |
simonis@6465 | 4894 | // We consume and ignore EINTR and spurious wakeups. |
simonis@6465 | 4895 | } |
simonis@6465 | 4896 | --_nParked; |
simonis@6465 | 4897 | if (_Event >= 0) { |
simonis@6465 | 4898 | ret = OS_OK; |
simonis@6465 | 4899 | } |
simonis@6465 | 4900 | _Event = 0; |
simonis@6465 | 4901 | status = pthread_mutex_unlock(_mutex); |
simonis@6465 | 4902 | assert_status(status == 0, status, "mutex_unlock"); |
simonis@6465 | 4903 | assert (_nParked == 0, "invariant"); |
simonis@6465 | 4904 | return ret; |
simonis@6465 | 4905 | } |
simonis@6465 | 4906 | |
simonis@6465 | 4907 | void os::PlatformEvent::unpark() { |
simonis@6465 | 4908 | int v, AnyWaiters; |
simonis@6465 | 4909 | for (;;) { |
simonis@6465 | 4910 | v = _Event; |
simonis@6465 | 4911 | if (v > 0) { |
simonis@6465 | 4912 | // The LD of _Event could have reordered or be satisfied |
simonis@6465 | 4913 | // by a read-aside from this processor's write buffer. |
simonis@6465 | 4914 | // To avoid problems execute a barrier and then |
simonis@6465 | 4915 | // ratify the value. |
simonis@6465 | 4916 | OrderAccess::fence(); |
simonis@6465 | 4917 | if (_Event == v) return; |
simonis@6465 | 4918 | continue; |
simonis@6465 | 4919 | } |
simonis@6465 | 4920 | if (Atomic::cmpxchg (v+1, &_Event, v) == v) break; |
simonis@6465 | 4921 | } |
simonis@6465 | 4922 | if (v < 0) { |
simonis@6465 | 4923 | // Wait for the thread associated with the event to vacate |
simonis@6465 | 4924 | int status = pthread_mutex_lock(_mutex); |
simonis@6465 | 4925 | assert_status(status == 0, status, "mutex_lock"); |
simonis@6465 | 4926 | AnyWaiters = _nParked; |
simonis@6465 | 4927 | |
simonis@6465 | 4928 | if (AnyWaiters != 0) { |
simonis@6465 | 4929 | // We intentional signal *after* dropping the lock |
simonis@6465 | 4930 | // to avoid a common class of futile wakeups. |
simonis@6465 | 4931 | status = pthread_cond_signal(_cond); |
simonis@6465 | 4932 | assert_status(status == 0, status, "cond_signal"); |
simonis@6465 | 4933 | } |
simonis@6465 | 4934 | // Mutex should be locked for pthread_cond_signal(_cond). |
simonis@6465 | 4935 | status = pthread_mutex_unlock(_mutex); |
simonis@6465 | 4936 | assert_status(status == 0, status, "mutex_unlock"); |
simonis@6465 | 4937 | } |
simonis@6465 | 4938 | |
simonis@6465 | 4939 | // Note that we signal() _after dropping the lock for "immortal" Events. |
simonis@6465 | 4940 | // This is safe and avoids a common class of futile wakeups. In rare |
simonis@6465 | 4941 | // circumstances this can cause a thread to return prematurely from |
simonis@6465 | 4942 | // cond_{timed}wait() but the spurious wakeup is benign and the victim will |
simonis@6465 | 4943 | // simply re-test the condition and re-park itself. |
simonis@6465 | 4944 | } |
simonis@6465 | 4945 | |
simonis@6465 | 4946 | |
simonis@6465 | 4947 | // JSR166 |
simonis@6465 | 4948 | // ------------------------------------------------------- |
simonis@6465 | 4949 | |
simonis@6465 | 4950 | // |
simonis@6465 | 4951 | // The solaris and linux implementations of park/unpark are fairly |
simonis@6465 | 4952 | // conservative for now, but can be improved. They currently use a |
simonis@6465 | 4953 | // mutex/condvar pair, plus a a count. |
simonis@6465 | 4954 | // Park decrements count if > 0, else does a condvar wait. Unpark |
simonis@6465 | 4955 | // sets count to 1 and signals condvar. Only one thread ever waits |
simonis@6465 | 4956 | // on the condvar. Contention seen when trying to park implies that someone |
simonis@6465 | 4957 | // is unparking you, so don't wait. And spurious returns are fine, so there |
simonis@6465 | 4958 | // is no need to track notifications. |
simonis@6465 | 4959 | // |
simonis@6465 | 4960 | |
simonis@6465 | 4961 | #define MAX_SECS 100000000 |
simonis@6465 | 4962 | // |
simonis@6465 | 4963 | // This code is common to linux and solaris and will be moved to a |
simonis@6465 | 4964 | // common place in dolphin. |
simonis@6465 | 4965 | // |
simonis@6465 | 4966 | // The passed in time value is either a relative time in nanoseconds |
simonis@6465 | 4967 | // or an absolute time in milliseconds. Either way it has to be unpacked |
simonis@6465 | 4968 | // into suitable seconds and nanoseconds components and stored in the |
simonis@6465 | 4969 | // given timespec structure. |
simonis@6465 | 4970 | // Given time is a 64-bit value and the time_t used in the timespec is only |
simonis@6465 | 4971 | // a signed-32-bit value (except on 64-bit Linux) we have to watch for |
simonis@6465 | 4972 | // overflow if times way in the future are given. Further on Solaris versions |
simonis@6465 | 4973 | // prior to 10 there is a restriction (see cond_timedwait) that the specified |
simonis@6465 | 4974 | // number of seconds, in abstime, is less than current_time + 100,000,000. |
simonis@6465 | 4975 | // As it will be 28 years before "now + 100000000" will overflow we can |
simonis@6465 | 4976 | // ignore overflow and just impose a hard-limit on seconds using the value |
simonis@6465 | 4977 | // of "now + 100,000,000". This places a limit on the timeout of about 3.17 |
simonis@6465 | 4978 | // years from "now". |
simonis@6465 | 4979 | // |
simonis@6465 | 4980 | |
simonis@6465 | 4981 | static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { |
simonis@6465 | 4982 | assert (time > 0, "convertTime"); |
simonis@6465 | 4983 | |
simonis@6465 | 4984 | struct timeval now; |
simonis@6465 | 4985 | int status = gettimeofday(&now, NULL); |
simonis@6465 | 4986 | assert(status == 0, "gettimeofday"); |
simonis@6465 | 4987 | |
simonis@6465 | 4988 | time_t max_secs = now.tv_sec + MAX_SECS; |
simonis@6465 | 4989 | |
simonis@6465 | 4990 | if (isAbsolute) { |
simonis@6465 | 4991 | jlong secs = time / 1000; |
simonis@6465 | 4992 | if (secs > max_secs) { |
simonis@6465 | 4993 | absTime->tv_sec = max_secs; |
simonis@6465 | 4994 | } |
simonis@6465 | 4995 | else { |
simonis@6465 | 4996 | absTime->tv_sec = secs; |
simonis@6465 | 4997 | } |
simonis@6465 | 4998 | absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; |
simonis@6465 | 4999 | } |
simonis@6465 | 5000 | else { |
simonis@6465 | 5001 | jlong secs = time / NANOSECS_PER_SEC; |
simonis@6465 | 5002 | if (secs >= MAX_SECS) { |
simonis@6465 | 5003 | absTime->tv_sec = max_secs; |
simonis@6465 | 5004 | absTime->tv_nsec = 0; |
simonis@6465 | 5005 | } |
simonis@6465 | 5006 | else { |
simonis@6465 | 5007 | absTime->tv_sec = now.tv_sec + secs; |
simonis@6465 | 5008 | absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; |
simonis@6465 | 5009 | if (absTime->tv_nsec >= NANOSECS_PER_SEC) { |
simonis@6465 | 5010 | absTime->tv_nsec -= NANOSECS_PER_SEC; |
simonis@6465 | 5011 | ++absTime->tv_sec; // note: this must be <= max_secs |
simonis@6465 | 5012 | } |
simonis@6465 | 5013 | } |
simonis@6465 | 5014 | } |
simonis@6465 | 5015 | assert(absTime->tv_sec >= 0, "tv_sec < 0"); |
simonis@6465 | 5016 | assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); |
simonis@6465 | 5017 | assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); |
simonis@6465 | 5018 | assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); |
simonis@6465 | 5019 | } |
simonis@6465 | 5020 | |
simonis@6465 | 5021 | void Parker::park(bool isAbsolute, jlong time) { |
simonis@6465 | 5022 | // Optional fast-path check: |
simonis@6465 | 5023 | // Return immediately if a permit is available. |
simonis@6465 | 5024 | if (_counter > 0) { |
simonis@6465 | 5025 | _counter = 0; |
simonis@6465 | 5026 | OrderAccess::fence(); |
simonis@6465 | 5027 | return; |
simonis@6465 | 5028 | } |
simonis@6465 | 5029 | |
simonis@6465 | 5030 | Thread* thread = Thread::current(); |
simonis@6465 | 5031 | assert(thread->is_Java_thread(), "Must be JavaThread"); |
simonis@6465 | 5032 | JavaThread *jt = (JavaThread *)thread; |
simonis@6465 | 5033 | |
simonis@6465 | 5034 | // Optional optimization -- avoid state transitions if there's an interrupt pending. |
simonis@6465 | 5035 | // Check interrupt before trying to wait |
simonis@6465 | 5036 | if (Thread::is_interrupted(thread, false)) { |
simonis@6465 | 5037 | return; |
simonis@6465 | 5038 | } |
simonis@6465 | 5039 | |
simonis@6465 | 5040 | // Next, demultiplex/decode time arguments |
simonis@6465 | 5041 | timespec absTime; |
simonis@6465 | 5042 | if (time < 0 || (isAbsolute && time == 0)) { // don't wait at all |
simonis@6465 | 5043 | return; |
simonis@6465 | 5044 | } |
simonis@6465 | 5045 | if (time > 0) { |
simonis@6465 | 5046 | unpackTime(&absTime, isAbsolute, time); |
simonis@6465 | 5047 | } |
simonis@6465 | 5048 | |
simonis@6465 | 5049 | |
simonis@6465 | 5050 | // Enter safepoint region |
simonis@6465 | 5051 | // Beware of deadlocks such as 6317397. |
simonis@6465 | 5052 | // The per-thread Parker:: mutex is a classic leaf-lock. |
simonis@6465 | 5053 | // In particular a thread must never block on the Threads_lock while |
simonis@6465 | 5054 | // holding the Parker:: mutex. If safepoints are pending both the |
simonis@6465 | 5055 | // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. |
simonis@6465 | 5056 | ThreadBlockInVM tbivm(jt); |
simonis@6465 | 5057 | |
simonis@6465 | 5058 | // Don't wait if cannot get lock since interference arises from |
simonis@6465 | 5059 | // unblocking. Also. check interrupt before trying wait |
simonis@6465 | 5060 | if (Thread::is_interrupted(thread, false) || pthread_mutex_trylock(_mutex) != 0) { |
simonis@6465 | 5061 | return; |
simonis@6465 | 5062 | } |
simonis@6465 | 5063 | |
simonis@6465 | 5064 | int status; |
simonis@6465 | 5065 | if (_counter > 0) { // no wait needed |
simonis@6465 | 5066 | _counter = 0; |
simonis@6465 | 5067 | status = pthread_mutex_unlock(_mutex); |
simonis@6465 | 5068 | assert (status == 0, "invariant"); |
simonis@6465 | 5069 | OrderAccess::fence(); |
simonis@6465 | 5070 | return; |
simonis@6465 | 5071 | } |
simonis@6465 | 5072 | |
simonis@6465 | 5073 | #ifdef ASSERT |
simonis@6465 | 5074 | // Don't catch signals while blocked; let the running threads have the signals. |
simonis@6465 | 5075 | // (This allows a debugger to break into the running thread.) |
simonis@6465 | 5076 | sigset_t oldsigs; |
simonis@6465 | 5077 | sigset_t* allowdebug_blocked = os::Aix::allowdebug_blocked_signals(); |
simonis@6465 | 5078 | pthread_sigmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); |
simonis@6465 | 5079 | #endif |
simonis@6465 | 5080 | |
simonis@6465 | 5081 | OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); |
simonis@6465 | 5082 | jt->set_suspend_equivalent(); |
simonis@6465 | 5083 | // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() |
simonis@6465 | 5084 | |
simonis@6465 | 5085 | if (time == 0) { |
simonis@6465 | 5086 | status = pthread_cond_wait (_cond, _mutex); |
simonis@6465 | 5087 | } else { |
simonis@6465 | 5088 | status = pthread_cond_timedwait (_cond, _mutex, &absTime); |
simonis@6465 | 5089 | if (status != 0 && WorkAroundNPTLTimedWaitHang) { |
simonis@6465 | 5090 | pthread_cond_destroy (_cond); |
simonis@6465 | 5091 | pthread_cond_init (_cond, NULL); |
simonis@6465 | 5092 | } |
simonis@6465 | 5093 | } |
simonis@6465 | 5094 | assert_status(status == 0 || status == EINTR || |
simonis@6465 | 5095 | status == ETIME || status == ETIMEDOUT, |
simonis@6465 | 5096 | status, "cond_timedwait"); |
simonis@6465 | 5097 | |
simonis@6465 | 5098 | #ifdef ASSERT |
simonis@6465 | 5099 | pthread_sigmask(SIG_SETMASK, &oldsigs, NULL); |
simonis@6465 | 5100 | #endif |
simonis@6465 | 5101 | |
simonis@6465 | 5102 | _counter = 0; |
simonis@6465 | 5103 | status = pthread_mutex_unlock(_mutex); |
simonis@6465 | 5104 | assert_status(status == 0, status, "invariant"); |
simonis@6465 | 5105 | // If externally suspended while waiting, re-suspend |
simonis@6465 | 5106 | if (jt->handle_special_suspend_equivalent_condition()) { |
simonis@6465 | 5107 | jt->java_suspend_self(); |
simonis@6465 | 5108 | } |
simonis@6465 | 5109 | |
simonis@6465 | 5110 | OrderAccess::fence(); |
simonis@6465 | 5111 | } |
simonis@6465 | 5112 | |
simonis@6465 | 5113 | void Parker::unpark() { |
simonis@6465 | 5114 | int s, status; |
simonis@6465 | 5115 | status = pthread_mutex_lock(_mutex); |
simonis@6465 | 5116 | assert (status == 0, "invariant"); |
simonis@6465 | 5117 | s = _counter; |
simonis@6465 | 5118 | _counter = 1; |
simonis@6465 | 5119 | if (s < 1) { |
simonis@6465 | 5120 | if (WorkAroundNPTLTimedWaitHang) { |
simonis@6465 | 5121 | status = pthread_cond_signal (_cond); |
simonis@6465 | 5122 | assert (status == 0, "invariant"); |
simonis@6465 | 5123 | status = pthread_mutex_unlock(_mutex); |
simonis@6465 | 5124 | assert (status == 0, "invariant"); |
simonis@6465 | 5125 | } else { |
simonis@6465 | 5126 | status = pthread_mutex_unlock(_mutex); |
simonis@6465 | 5127 | assert (status == 0, "invariant"); |
simonis@6465 | 5128 | status = pthread_cond_signal (_cond); |
simonis@6465 | 5129 | assert (status == 0, "invariant"); |
simonis@6465 | 5130 | } |
simonis@6465 | 5131 | } else { |
simonis@6465 | 5132 | pthread_mutex_unlock(_mutex); |
simonis@6465 | 5133 | assert (status == 0, "invariant"); |
simonis@6465 | 5134 | } |
simonis@6465 | 5135 | } |
simonis@6465 | 5136 | |
simonis@6465 | 5137 | |
simonis@6465 | 5138 | extern char** environ; |
simonis@6465 | 5139 | |
simonis@6465 | 5140 | // Run the specified command in a separate process. Return its exit value, |
simonis@6465 | 5141 | // or -1 on failure (e.g. can't fork a new process). |
simonis@6465 | 5142 | // Unlike system(), this function can be called from signal handler. It |
simonis@6465 | 5143 | // doesn't block SIGINT et al. |
simonis@6465 | 5144 | int os::fork_and_exec(char* cmd) { |
simonis@6471 | 5145 | char * argv[4] = {"sh", "-c", cmd, NULL}; |
simonis@6471 | 5146 | |
simonis@6471 | 5147 | pid_t pid = fork(); |
simonis@6471 | 5148 | |
simonis@6471 | 5149 | if (pid < 0) { |
simonis@6471 | 5150 | // fork failed |
simonis@6471 | 5151 | return -1; |
simonis@6471 | 5152 | |
simonis@6471 | 5153 | } else if (pid == 0) { |
simonis@6471 | 5154 | // child process |
simonis@6471 | 5155 | |
simonis@6471 | 5156 | // try to be consistent with system(), which uses "/usr/bin/sh" on AIX |
simonis@6471 | 5157 | execve("/usr/bin/sh", argv, environ); |
simonis@6471 | 5158 | |
simonis@6471 | 5159 | // execve failed |
simonis@6471 | 5160 | _exit(-1); |
simonis@6471 | 5161 | |
simonis@6471 | 5162 | } else { |
simonis@6471 | 5163 | // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't |
simonis@6471 | 5164 | // care about the actual exit code, for now. |
simonis@6471 | 5165 | |
simonis@6471 | 5166 | int status; |
simonis@6471 | 5167 | |
simonis@6471 | 5168 | // Wait for the child process to exit. This returns immediately if |
simonis@6471 | 5169 | // the child has already exited. */ |
simonis@6471 | 5170 | while (waitpid(pid, &status, 0) < 0) { |
simonis@6471 | 5171 | switch (errno) { |
simonis@6471 | 5172 | case ECHILD: return 0; |
simonis@6471 | 5173 | case EINTR: break; |
simonis@6471 | 5174 | default: return -1; |
simonis@6471 | 5175 | } |
simonis@6471 | 5176 | } |
simonis@6471 | 5177 | |
simonis@6471 | 5178 | if (WIFEXITED(status)) { |
simonis@6471 | 5179 | // The child exited normally; get its exit code. |
simonis@6471 | 5180 | return WEXITSTATUS(status); |
simonis@6471 | 5181 | } else if (WIFSIGNALED(status)) { |
simonis@6471 | 5182 | // The child exited because of a signal |
simonis@6471 | 5183 | // The best value to return is 0x80 + signal number, |
simonis@6471 | 5184 | // because that is what all Unix shells do, and because |
simonis@6471 | 5185 | // it allows callers to distinguish between process exit and |
simonis@6471 | 5186 | // process death by signal. |
simonis@6471 | 5187 | return 0x80 + WTERMSIG(status); |
simonis@6471 | 5188 | } else { |
simonis@6471 | 5189 | // Unknown exit code; pass it through |
simonis@6471 | 5190 | return status; |
simonis@6471 | 5191 | } |
simonis@6471 | 5192 | } |
simonis@6471 | 5193 | // Remove warning. |
simonis@6471 | 5194 | return -1; |
simonis@6465 | 5195 | } |
simonis@6465 | 5196 | |
simonis@6465 | 5197 | // is_headless_jre() |
simonis@6465 | 5198 | // |
simonis@6465 | 5199 | // Test for the existence of xawt/libmawt.so or libawt_xawt.so |
simonis@6465 | 5200 | // in order to report if we are running in a headless jre. |
simonis@6465 | 5201 | // |
simonis@6465 | 5202 | // Since JDK8 xawt/libmawt.so is moved into the same directory |
simonis@6465 | 5203 | // as libawt.so, and renamed libawt_xawt.so |
simonis@6465 | 5204 | bool os::is_headless_jre() { |
simonis@6465 | 5205 | struct stat statbuf; |
simonis@6465 | 5206 | char buf[MAXPATHLEN]; |
simonis@6465 | 5207 | char libmawtpath[MAXPATHLEN]; |
simonis@6465 | 5208 | const char *xawtstr = "/xawt/libmawt.so"; |
simonis@6465 | 5209 | const char *new_xawtstr = "/libawt_xawt.so"; |
simonis@6465 | 5210 | |
simonis@6465 | 5211 | char *p; |
simonis@6465 | 5212 | |
simonis@6465 | 5213 | // Get path to libjvm.so |
simonis@6465 | 5214 | os::jvm_path(buf, sizeof(buf)); |
simonis@6465 | 5215 | |
simonis@6465 | 5216 | // Get rid of libjvm.so |
simonis@6465 | 5217 | p = strrchr(buf, '/'); |
simonis@6465 | 5218 | if (p == NULL) return false; |
simonis@6465 | 5219 | else *p = '\0'; |
simonis@6465 | 5220 | |
simonis@6465 | 5221 | // Get rid of client or server |
simonis@6465 | 5222 | p = strrchr(buf, '/'); |
simonis@6465 | 5223 | if (p == NULL) return false; |
simonis@6465 | 5224 | else *p = '\0'; |
simonis@6465 | 5225 | |
simonis@6465 | 5226 | // check xawt/libmawt.so |
simonis@6465 | 5227 | strcpy(libmawtpath, buf); |
simonis@6465 | 5228 | strcat(libmawtpath, xawtstr); |
simonis@6465 | 5229 | if (::stat(libmawtpath, &statbuf) == 0) return false; |
simonis@6465 | 5230 | |
simonis@6465 | 5231 | // check libawt_xawt.so |
simonis@6465 | 5232 | strcpy(libmawtpath, buf); |
simonis@6465 | 5233 | strcat(libmawtpath, new_xawtstr); |
simonis@6465 | 5234 | if (::stat(libmawtpath, &statbuf) == 0) return false; |
simonis@6465 | 5235 | |
simonis@6465 | 5236 | return true; |
simonis@6465 | 5237 | } |
simonis@6465 | 5238 | |
simonis@6465 | 5239 | // Get the default path to the core file |
simonis@6465 | 5240 | // Returns the length of the string |
simonis@6465 | 5241 | int os::get_core_path(char* buffer, size_t bufferSize) { |
simonis@6465 | 5242 | const char* p = get_current_directory(buffer, bufferSize); |
simonis@6465 | 5243 | |
simonis@6465 | 5244 | if (p == NULL) { |
simonis@6465 | 5245 | assert(p != NULL, "failed to get current directory"); |
simonis@6465 | 5246 | return 0; |
simonis@6465 | 5247 | } |
simonis@6465 | 5248 | |
simonis@6465 | 5249 | return strlen(buffer); |
simonis@6465 | 5250 | } |
simonis@6465 | 5251 | |
simonis@6465 | 5252 | #ifndef PRODUCT |
simonis@6465 | 5253 | void TestReserveMemorySpecial_test() { |
simonis@6465 | 5254 | // No tests available for this platform |
simonis@6465 | 5255 | } |
simonis@6465 | 5256 | #endif |