Thu, 27 Dec 2018 11:43:33 +0800
Merge
aoqi@0 | 1 | /* |
dbuck@9289 | 2 | * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * Copyright 2012, 2014 SAP AG. All rights reserved. |
aoqi@0 | 4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 5 | * |
aoqi@0 | 6 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 7 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 8 | * published by the Free Software Foundation. |
aoqi@0 | 9 | * |
aoqi@0 | 10 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 13 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 14 | * accompanied this code). |
aoqi@0 | 15 | * |
aoqi@0 | 16 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 17 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 18 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 19 | * |
aoqi@0 | 20 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 21 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 22 | * questions. |
aoqi@0 | 23 | * |
aoqi@0 | 24 | */ |
aoqi@0 | 25 | |
aoqi@0 | 26 | // According to the AIX OS doc #pragma alloca must be used |
aoqi@0 | 27 | // with C++ compiler before referencing the function alloca() |
aoqi@0 | 28 | #pragma alloca |
aoqi@0 | 29 | |
aoqi@0 | 30 | // no precompiled headers |
aoqi@0 | 31 | #include "classfile/classLoader.hpp" |
aoqi@0 | 32 | #include "classfile/systemDictionary.hpp" |
aoqi@0 | 33 | #include "classfile/vmSymbols.hpp" |
aoqi@0 | 34 | #include "code/icBuffer.hpp" |
aoqi@0 | 35 | #include "code/vtableStubs.hpp" |
aoqi@0 | 36 | #include "compiler/compileBroker.hpp" |
aoqi@0 | 37 | #include "interpreter/interpreter.hpp" |
aoqi@0 | 38 | #include "jvm_aix.h" |
aoqi@0 | 39 | #include "libperfstat_aix.hpp" |
aoqi@0 | 40 | #include "loadlib_aix.hpp" |
aoqi@0 | 41 | #include "memory/allocation.inline.hpp" |
aoqi@0 | 42 | #include "memory/filemap.hpp" |
aoqi@0 | 43 | #include "mutex_aix.inline.hpp" |
aoqi@0 | 44 | #include "oops/oop.inline.hpp" |
aoqi@0 | 45 | #include "os_share_aix.hpp" |
aoqi@0 | 46 | #include "porting_aix.hpp" |
aoqi@0 | 47 | #include "prims/jniFastGetField.hpp" |
aoqi@0 | 48 | #include "prims/jvm.h" |
aoqi@0 | 49 | #include "prims/jvm_misc.hpp" |
aoqi@0 | 50 | #include "runtime/arguments.hpp" |
aoqi@0 | 51 | #include "runtime/extendedPC.hpp" |
aoqi@0 | 52 | #include "runtime/globals.hpp" |
aoqi@0 | 53 | #include "runtime/interfaceSupport.hpp" |
aoqi@0 | 54 | #include "runtime/java.hpp" |
aoqi@0 | 55 | #include "runtime/javaCalls.hpp" |
aoqi@0 | 56 | #include "runtime/mutexLocker.hpp" |
aoqi@0 | 57 | #include "runtime/objectMonitor.hpp" |
goetz@6911 | 58 | #include "runtime/orderAccess.inline.hpp" |
aoqi@0 | 59 | #include "runtime/osThread.hpp" |
aoqi@0 | 60 | #include "runtime/perfMemory.hpp" |
aoqi@0 | 61 | #include "runtime/sharedRuntime.hpp" |
aoqi@0 | 62 | #include "runtime/statSampler.hpp" |
aoqi@0 | 63 | #include "runtime/stubRoutines.hpp" |
aoqi@0 | 64 | #include "runtime/thread.inline.hpp" |
aoqi@0 | 65 | #include "runtime/threadCritical.hpp" |
aoqi@0 | 66 | #include "runtime/timer.hpp" |
aoqi@0 | 67 | #include "services/attachListener.hpp" |
aoqi@0 | 68 | #include "services/runtimeService.hpp" |
aoqi@0 | 69 | #include "utilities/decoder.hpp" |
aoqi@0 | 70 | #include "utilities/defaultStream.hpp" |
aoqi@0 | 71 | #include "utilities/events.hpp" |
aoqi@0 | 72 | #include "utilities/growableArray.hpp" |
aoqi@0 | 73 | #include "utilities/vmError.hpp" |
aoqi@0 | 74 | |
aoqi@0 | 75 | // put OS-includes here (sorted alphabetically) |
aoqi@0 | 76 | #include <errno.h> |
aoqi@0 | 77 | #include <fcntl.h> |
aoqi@0 | 78 | #include <inttypes.h> |
aoqi@0 | 79 | #include <poll.h> |
aoqi@0 | 80 | #include <procinfo.h> |
aoqi@0 | 81 | #include <pthread.h> |
aoqi@0 | 82 | #include <pwd.h> |
aoqi@0 | 83 | #include <semaphore.h> |
aoqi@0 | 84 | #include <signal.h> |
aoqi@0 | 85 | #include <stdint.h> |
aoqi@0 | 86 | #include <stdio.h> |
aoqi@0 | 87 | #include <string.h> |
aoqi@0 | 88 | #include <unistd.h> |
aoqi@0 | 89 | #include <sys/ioctl.h> |
aoqi@0 | 90 | #include <sys/ipc.h> |
aoqi@0 | 91 | #include <sys/mman.h> |
aoqi@0 | 92 | #include <sys/resource.h> |
aoqi@0 | 93 | #include <sys/select.h> |
aoqi@0 | 94 | #include <sys/shm.h> |
aoqi@0 | 95 | #include <sys/socket.h> |
aoqi@0 | 96 | #include <sys/stat.h> |
aoqi@0 | 97 | #include <sys/sysinfo.h> |
aoqi@0 | 98 | #include <sys/systemcfg.h> |
aoqi@0 | 99 | #include <sys/time.h> |
aoqi@0 | 100 | #include <sys/times.h> |
aoqi@0 | 101 | #include <sys/types.h> |
aoqi@0 | 102 | #include <sys/utsname.h> |
aoqi@0 | 103 | #include <sys/vminfo.h> |
aoqi@0 | 104 | #include <sys/wait.h> |
aoqi@0 | 105 | |
aoqi@0 | 106 | // Add missing declarations (should be in procinfo.h but isn't until AIX 6.1). |
aoqi@0 | 107 | #if !defined(_AIXVERSION_610) |
aoqi@0 | 108 | extern "C" { |
aoqi@0 | 109 | int getthrds64(pid_t ProcessIdentifier, |
aoqi@0 | 110 | struct thrdentry64* ThreadBuffer, |
aoqi@0 | 111 | int ThreadSize, |
aoqi@0 | 112 | tid64_t* IndexPointer, |
aoqi@0 | 113 | int Count); |
aoqi@0 | 114 | } |
aoqi@0 | 115 | #endif |
aoqi@0 | 116 | |
aoqi@0 | 117 | #define MAX_PATH (2 * K) |
aoqi@0 | 118 | |
aoqi@0 | 119 | // for timer info max values which include all bits |
aoqi@0 | 120 | #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) |
aoqi@0 | 121 | // for multipage initialization error analysis (in 'g_multipage_error') |
aoqi@0 | 122 | #define ERROR_MP_OS_TOO_OLD 100 |
aoqi@0 | 123 | #define ERROR_MP_EXTSHM_ACTIVE 101 |
aoqi@0 | 124 | #define ERROR_MP_VMGETINFO_FAILED 102 |
aoqi@0 | 125 | #define ERROR_MP_VMGETINFO_CLAIMS_NO_SUPPORT_FOR_64K 103 |
aoqi@0 | 126 | |
goetz@7424 | 127 | // The semantics in this file are thus that codeptr_t is a *real code ptr*. |
aoqi@0 | 128 | // This means that any function taking codeptr_t as arguments will assume |
aoqi@0 | 129 | // a real codeptr and won't handle function descriptors (eg getFuncName), |
aoqi@0 | 130 | // whereas functions taking address as args will deal with function |
goetz@7424 | 131 | // descriptors (eg os::dll_address_to_library_name). |
aoqi@0 | 132 | typedef unsigned int* codeptr_t; |
aoqi@0 | 133 | |
goetz@7424 | 134 | // Typedefs for stackslots, stack pointers, pointers to op codes. |
aoqi@0 | 135 | typedef unsigned long stackslot_t; |
aoqi@0 | 136 | typedef stackslot_t* stackptr_t; |
aoqi@0 | 137 | |
goetz@7424 | 138 | // Excerpts from systemcfg.h definitions newer than AIX 5.3. |
goetz@7424 | 139 | #ifndef PV_7 |
goetz@7424 | 140 | #define PV_7 0x200000 /* Power PC 7 */ |
goetz@7424 | 141 | #define PV_7_Compat 0x208000 /* Power PC 7 */ |
goetz@7424 | 142 | #endif |
goetz@7424 | 143 | #ifndef PV_8 |
goetz@7424 | 144 | #define PV_8 0x300000 /* Power PC 8 */ |
goetz@7424 | 145 | #define PV_8_Compat 0x308000 /* Power PC 8 */ |
goetz@7424 | 146 | #endif |
goetz@7424 | 147 | |
goetz@7424 | 148 | #define trcVerbose(fmt, ...) { /* PPC port */ \ |
goetz@7424 | 149 | if (Verbose) { \ |
goetz@7424 | 150 | fprintf(stderr, fmt, ##__VA_ARGS__); \ |
goetz@7424 | 151 | fputc('\n', stderr); fflush(stderr); \ |
goetz@7424 | 152 | } \ |
goetz@7424 | 153 | } |
goetz@7424 | 154 | #define trc(fmt, ...) /* PPC port */ |
goetz@7424 | 155 | |
goetz@7424 | 156 | #define ERRBYE(s) { \ |
goetz@7424 | 157 | trcVerbose(s); \ |
goetz@7424 | 158 | return -1; \ |
goetz@7424 | 159 | } |
goetz@7424 | 160 | |
aoqi@0 | 161 | // query dimensions of the stack of the calling thread |
aoqi@0 | 162 | static void query_stack_dimensions(address* p_stack_base, size_t* p_stack_size); |
aoqi@0 | 163 | |
aoqi@0 | 164 | // function to check a given stack pointer against given stack limits |
aoqi@0 | 165 | inline bool is_valid_stackpointer(stackptr_t sp, stackptr_t stack_base, size_t stack_size) { |
aoqi@0 | 166 | if (((uintptr_t)sp) & 0x7) { |
aoqi@0 | 167 | return false; |
aoqi@0 | 168 | } |
aoqi@0 | 169 | if (sp > stack_base) { |
aoqi@0 | 170 | return false; |
aoqi@0 | 171 | } |
aoqi@0 | 172 | if (sp < (stackptr_t) ((address)stack_base - stack_size)) { |
aoqi@0 | 173 | return false; |
aoqi@0 | 174 | } |
aoqi@0 | 175 | return true; |
aoqi@0 | 176 | } |
aoqi@0 | 177 | |
aoqi@0 | 178 | // returns true if function is a valid codepointer |
aoqi@0 | 179 | inline bool is_valid_codepointer(codeptr_t p) { |
aoqi@0 | 180 | if (!p) { |
aoqi@0 | 181 | return false; |
aoqi@0 | 182 | } |
aoqi@0 | 183 | if (((uintptr_t)p) & 0x3) { |
aoqi@0 | 184 | return false; |
aoqi@0 | 185 | } |
aoqi@0 | 186 | if (LoadedLibraries::find_for_text_address((address)p) == NULL) { |
aoqi@0 | 187 | return false; |
aoqi@0 | 188 | } |
aoqi@0 | 189 | return true; |
aoqi@0 | 190 | } |
aoqi@0 | 191 | |
goetz@7424 | 192 | // Macro to check a given stack pointer against given stack limits and to die if test fails. |
aoqi@0 | 193 | #define CHECK_STACK_PTR(sp, stack_base, stack_size) { \ |
aoqi@0 | 194 | guarantee(is_valid_stackpointer((stackptr_t)(sp), (stackptr_t)(stack_base), stack_size), "Stack Pointer Invalid"); \ |
aoqi@0 | 195 | } |
aoqi@0 | 196 | |
goetz@7424 | 197 | // Macro to check the current stack pointer against given stacklimits. |
aoqi@0 | 198 | #define CHECK_CURRENT_STACK_PTR(stack_base, stack_size) { \ |
aoqi@0 | 199 | address sp; \ |
aoqi@0 | 200 | sp = os::current_stack_pointer(); \ |
aoqi@0 | 201 | CHECK_STACK_PTR(sp, stack_base, stack_size); \ |
aoqi@0 | 202 | } |
aoqi@0 | 203 | |
aoqi@0 | 204 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 205 | // global variables (for a description see os_aix.hpp) |
aoqi@0 | 206 | |
aoqi@0 | 207 | julong os::Aix::_physical_memory = 0; |
aoqi@0 | 208 | pthread_t os::Aix::_main_thread = ((pthread_t)0); |
aoqi@0 | 209 | int os::Aix::_page_size = -1; |
aoqi@0 | 210 | int os::Aix::_on_pase = -1; |
aoqi@0 | 211 | int os::Aix::_os_version = -1; |
aoqi@0 | 212 | int os::Aix::_stack_page_size = -1; |
aoqi@0 | 213 | size_t os::Aix::_shm_default_page_size = -1; |
aoqi@0 | 214 | int os::Aix::_can_use_64K_pages = -1; |
aoqi@0 | 215 | int os::Aix::_can_use_16M_pages = -1; |
aoqi@0 | 216 | int os::Aix::_xpg_sus_mode = -1; |
aoqi@0 | 217 | int os::Aix::_extshm = -1; |
aoqi@0 | 218 | int os::Aix::_logical_cpus = -1; |
aoqi@0 | 219 | |
aoqi@0 | 220 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 221 | // local variables |
aoqi@0 | 222 | |
aoqi@0 | 223 | static int g_multipage_error = -1; // error analysis for multipage initialization |
aoqi@0 | 224 | static jlong initial_time_count = 0; |
aoqi@0 | 225 | static int clock_tics_per_sec = 100; |
aoqi@0 | 226 | static sigset_t check_signal_done; // For diagnostics to print a message once (see run_periodic_checks) |
aoqi@0 | 227 | static bool check_signals = true; |
aoqi@0 | 228 | static pid_t _initial_pid = 0; |
aoqi@0 | 229 | static int SR_signum = SIGUSR2; // Signal used to suspend/resume a thread (must be > SIGSEGV, see 4355769) |
aoqi@0 | 230 | static sigset_t SR_sigset; |
goetz@7424 | 231 | static pthread_mutex_t dl_mutex; // Used to protect dlsym() calls. |
aoqi@0 | 232 | |
aoqi@0 | 233 | julong os::available_memory() { |
aoqi@0 | 234 | return Aix::available_memory(); |
aoqi@0 | 235 | } |
aoqi@0 | 236 | |
aoqi@0 | 237 | julong os::Aix::available_memory() { |
aoqi@0 | 238 | os::Aix::meminfo_t mi; |
aoqi@0 | 239 | if (os::Aix::get_meminfo(&mi)) { |
aoqi@0 | 240 | return mi.real_free; |
aoqi@0 | 241 | } else { |
aoqi@0 | 242 | return 0xFFFFFFFFFFFFFFFFLL; |
aoqi@0 | 243 | } |
aoqi@0 | 244 | } |
aoqi@0 | 245 | |
aoqi@0 | 246 | julong os::physical_memory() { |
aoqi@0 | 247 | return Aix::physical_memory(); |
aoqi@0 | 248 | } |
aoqi@0 | 249 | |
aoqi@0 | 250 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 251 | // environment support |
aoqi@0 | 252 | |
aoqi@0 | 253 | bool os::getenv(const char* name, char* buf, int len) { |
aoqi@0 | 254 | const char* val = ::getenv(name); |
aoqi@0 | 255 | if (val != NULL && strlen(val) < (size_t)len) { |
aoqi@0 | 256 | strcpy(buf, val); |
aoqi@0 | 257 | return true; |
aoqi@0 | 258 | } |
aoqi@0 | 259 | if (len > 0) buf[0] = 0; // return a null string |
aoqi@0 | 260 | return false; |
aoqi@0 | 261 | } |
aoqi@0 | 262 | |
aoqi@0 | 263 | // Return true if user is running as root. |
aoqi@0 | 264 | |
aoqi@0 | 265 | bool os::have_special_privileges() { |
aoqi@0 | 266 | static bool init = false; |
aoqi@0 | 267 | static bool privileges = false; |
aoqi@0 | 268 | if (!init) { |
aoqi@0 | 269 | privileges = (getuid() != geteuid()) || (getgid() != getegid()); |
aoqi@0 | 270 | init = true; |
aoqi@0 | 271 | } |
aoqi@0 | 272 | return privileges; |
aoqi@0 | 273 | } |
aoqi@0 | 274 | |
aoqi@0 | 275 | // Helper function, emulates disclaim64 using multiple 32bit disclaims |
aoqi@0 | 276 | // because we cannot use disclaim64() on AS/400 and old AIX releases. |
aoqi@0 | 277 | static bool my_disclaim64(char* addr, size_t size) { |
aoqi@0 | 278 | |
aoqi@0 | 279 | if (size == 0) { |
aoqi@0 | 280 | return true; |
aoqi@0 | 281 | } |
aoqi@0 | 282 | |
aoqi@0 | 283 | // Maximum size 32bit disclaim() accepts. (Theoretically 4GB, but I just do not trust that.) |
aoqi@0 | 284 | const unsigned int maxDisclaimSize = 0x80000000; |
aoqi@0 | 285 | |
aoqi@0 | 286 | const unsigned int numFullDisclaimsNeeded = (size / maxDisclaimSize); |
aoqi@0 | 287 | const unsigned int lastDisclaimSize = (size % maxDisclaimSize); |
aoqi@0 | 288 | |
aoqi@0 | 289 | char* p = addr; |
aoqi@0 | 290 | |
aoqi@0 | 291 | for (int i = 0; i < numFullDisclaimsNeeded; i ++) { |
aoqi@0 | 292 | if (::disclaim(p, maxDisclaimSize, DISCLAIM_ZEROMEM) != 0) { |
goetz@7424 | 293 | trc("Cannot disclaim %p - %p (errno %d)\n", p, p + maxDisclaimSize, errno); |
aoqi@0 | 294 | return false; |
aoqi@0 | 295 | } |
aoqi@0 | 296 | p += maxDisclaimSize; |
aoqi@0 | 297 | } |
aoqi@0 | 298 | |
aoqi@0 | 299 | if (lastDisclaimSize > 0) { |
aoqi@0 | 300 | if (::disclaim(p, lastDisclaimSize, DISCLAIM_ZEROMEM) != 0) { |
goetz@7424 | 301 | trc("Cannot disclaim %p - %p (errno %d)\n", p, p + lastDisclaimSize, errno); |
aoqi@0 | 302 | return false; |
aoqi@0 | 303 | } |
aoqi@0 | 304 | } |
aoqi@0 | 305 | |
aoqi@0 | 306 | return true; |
aoqi@0 | 307 | } |
aoqi@0 | 308 | |
aoqi@0 | 309 | // Cpu architecture string |
aoqi@0 | 310 | #if defined(PPC32) |
aoqi@0 | 311 | static char cpu_arch[] = "ppc"; |
aoqi@0 | 312 | #elif defined(PPC64) |
aoqi@0 | 313 | static char cpu_arch[] = "ppc64"; |
aoqi@0 | 314 | #else |
aoqi@0 | 315 | #error Add appropriate cpu_arch setting |
aoqi@0 | 316 | #endif |
aoqi@0 | 317 | |
aoqi@0 | 318 | |
aoqi@0 | 319 | // Given an address, returns the size of the page backing that address. |
aoqi@0 | 320 | size_t os::Aix::query_pagesize(void* addr) { |
aoqi@0 | 321 | |
aoqi@0 | 322 | vm_page_info pi; |
aoqi@0 | 323 | pi.addr = (uint64_t)addr; |
aoqi@0 | 324 | if (::vmgetinfo(&pi, VM_PAGE_INFO, sizeof(pi)) == 0) { |
aoqi@0 | 325 | return pi.pagesize; |
aoqi@0 | 326 | } else { |
aoqi@0 | 327 | fprintf(stderr, "vmgetinfo failed to retrieve page size for address %p (errno %d).\n", addr, errno); |
aoqi@0 | 328 | assert(false, "vmgetinfo failed to retrieve page size"); |
aoqi@0 | 329 | return SIZE_4K; |
aoqi@0 | 330 | } |
aoqi@0 | 331 | |
aoqi@0 | 332 | } |
aoqi@0 | 333 | |
aoqi@0 | 334 | // Returns the kernel thread id of the currently running thread. |
aoqi@0 | 335 | pid_t os::Aix::gettid() { |
aoqi@0 | 336 | return (pid_t) thread_self(); |
aoqi@0 | 337 | } |
aoqi@0 | 338 | |
aoqi@0 | 339 | void os::Aix::initialize_system_info() { |
aoqi@0 | 340 | |
goetz@7424 | 341 | // Get the number of online(logical) cpus instead of configured. |
aoqi@0 | 342 | os::_processor_count = sysconf(_SC_NPROCESSORS_ONLN); |
aoqi@0 | 343 | assert(_processor_count > 0, "_processor_count must be > 0"); |
aoqi@0 | 344 | |
goetz@7424 | 345 | // Retrieve total physical storage. |
aoqi@0 | 346 | os::Aix::meminfo_t mi; |
aoqi@0 | 347 | if (!os::Aix::get_meminfo(&mi)) { |
aoqi@0 | 348 | fprintf(stderr, "os::Aix::get_meminfo failed.\n"); fflush(stderr); |
aoqi@0 | 349 | assert(false, "os::Aix::get_meminfo failed."); |
aoqi@0 | 350 | } |
aoqi@0 | 351 | _physical_memory = (julong) mi.real_total; |
aoqi@0 | 352 | } |
aoqi@0 | 353 | |
aoqi@0 | 354 | // Helper function for tracing page sizes. |
aoqi@0 | 355 | static const char* describe_pagesize(size_t pagesize) { |
aoqi@0 | 356 | switch (pagesize) { |
aoqi@0 | 357 | case SIZE_4K : return "4K"; |
aoqi@0 | 358 | case SIZE_64K: return "64K"; |
aoqi@0 | 359 | case SIZE_16M: return "16M"; |
aoqi@0 | 360 | case SIZE_16G: return "16G"; |
aoqi@0 | 361 | default: |
aoqi@0 | 362 | assert(false, "surprise"); |
aoqi@0 | 363 | return "??"; |
aoqi@0 | 364 | } |
aoqi@0 | 365 | } |
aoqi@0 | 366 | |
aoqi@0 | 367 | // Retrieve information about multipage size support. Will initialize |
aoqi@0 | 368 | // Aix::_page_size, Aix::_stack_page_size, Aix::_can_use_64K_pages, |
aoqi@0 | 369 | // Aix::_can_use_16M_pages. |
aoqi@0 | 370 | // Must be called before calling os::large_page_init(). |
aoqi@0 | 371 | void os::Aix::query_multipage_support() { |
aoqi@0 | 372 | |
aoqi@0 | 373 | guarantee(_page_size == -1 && |
aoqi@0 | 374 | _stack_page_size == -1 && |
aoqi@0 | 375 | _can_use_64K_pages == -1 && |
aoqi@0 | 376 | _can_use_16M_pages == -1 && |
aoqi@0 | 377 | g_multipage_error == -1, |
aoqi@0 | 378 | "do not call twice"); |
aoqi@0 | 379 | |
aoqi@0 | 380 | _page_size = ::sysconf(_SC_PAGESIZE); |
aoqi@0 | 381 | |
aoqi@0 | 382 | // This really would surprise me. |
aoqi@0 | 383 | assert(_page_size == SIZE_4K, "surprise!"); |
aoqi@0 | 384 | |
aoqi@0 | 385 | |
aoqi@0 | 386 | // Query default data page size (default page size for C-Heap, pthread stacks and .bss). |
aoqi@0 | 387 | // Default data page size is influenced either by linker options (-bdatapsize) |
aoqi@0 | 388 | // or by environment variable LDR_CNTRL (suboption DATAPSIZE). If none is given, |
aoqi@0 | 389 | // default should be 4K. |
aoqi@0 | 390 | size_t data_page_size = SIZE_4K; |
aoqi@0 | 391 | { |
aoqi@0 | 392 | void* p = ::malloc(SIZE_16M); |
aoqi@0 | 393 | guarantee(p != NULL, "malloc failed"); |
aoqi@0 | 394 | data_page_size = os::Aix::query_pagesize(p); |
aoqi@0 | 395 | ::free(p); |
aoqi@0 | 396 | } |
aoqi@0 | 397 | |
aoqi@0 | 398 | // query default shm page size (LDR_CNTRL SHMPSIZE) |
aoqi@0 | 399 | { |
aoqi@0 | 400 | const int shmid = ::shmget(IPC_PRIVATE, 1, IPC_CREAT | S_IRUSR | S_IWUSR); |
aoqi@0 | 401 | guarantee(shmid != -1, "shmget failed"); |
aoqi@0 | 402 | void* p = ::shmat(shmid, NULL, 0); |
aoqi@0 | 403 | ::shmctl(shmid, IPC_RMID, NULL); |
aoqi@0 | 404 | guarantee(p != (void*) -1, "shmat failed"); |
aoqi@0 | 405 | _shm_default_page_size = os::Aix::query_pagesize(p); |
aoqi@0 | 406 | ::shmdt(p); |
aoqi@0 | 407 | } |
aoqi@0 | 408 | |
aoqi@0 | 409 | // before querying the stack page size, make sure we are not running as primordial |
aoqi@0 | 410 | // thread (because primordial thread's stack may have different page size than |
aoqi@0 | 411 | // pthread thread stacks). Running a VM on the primordial thread won't work for a |
aoqi@0 | 412 | // number of reasons so we may just as well guarantee it here |
dbuck@9289 | 413 | guarantee(!os::is_primordial_thread(), "Must not be called for primordial thread"); |
aoqi@0 | 414 | |
aoqi@0 | 415 | // query stack page size |
aoqi@0 | 416 | { |
aoqi@0 | 417 | int dummy = 0; |
aoqi@0 | 418 | _stack_page_size = os::Aix::query_pagesize(&dummy); |
aoqi@0 | 419 | // everything else would surprise me and should be looked into |
aoqi@0 | 420 | guarantee(_stack_page_size == SIZE_4K || _stack_page_size == SIZE_64K, "Wrong page size"); |
aoqi@0 | 421 | // also, just for completeness: pthread stacks are allocated from C heap, so |
aoqi@0 | 422 | // stack page size should be the same as data page size |
aoqi@0 | 423 | guarantee(_stack_page_size == data_page_size, "stack page size should be the same as data page size"); |
aoqi@0 | 424 | } |
aoqi@0 | 425 | |
aoqi@0 | 426 | // EXTSHM is bad: among other things, it prevents setting pagesize dynamically |
aoqi@0 | 427 | // for system V shm. |
aoqi@0 | 428 | if (Aix::extshm()) { |
aoqi@0 | 429 | if (Verbose) { |
aoqi@0 | 430 | fprintf(stderr, "EXTSHM is active - will disable large page support.\n" |
aoqi@0 | 431 | "Please make sure EXTSHM is OFF for large page support.\n"); |
aoqi@0 | 432 | } |
aoqi@0 | 433 | g_multipage_error = ERROR_MP_EXTSHM_ACTIVE; |
aoqi@0 | 434 | _can_use_64K_pages = _can_use_16M_pages = 0; |
aoqi@0 | 435 | goto query_multipage_support_end; |
aoqi@0 | 436 | } |
aoqi@0 | 437 | |
aoqi@0 | 438 | // now check which page sizes the OS claims it supports, and of those, which actually can be used. |
aoqi@0 | 439 | { |
aoqi@0 | 440 | const int MAX_PAGE_SIZES = 4; |
aoqi@0 | 441 | psize_t sizes[MAX_PAGE_SIZES]; |
aoqi@0 | 442 | const int num_psizes = ::vmgetinfo(sizes, VMINFO_GETPSIZES, MAX_PAGE_SIZES); |
aoqi@0 | 443 | if (num_psizes == -1) { |
aoqi@0 | 444 | if (Verbose) { |
aoqi@0 | 445 | fprintf(stderr, "vmgetinfo(VMINFO_GETPSIZES) failed (errno: %d)\n", errno); |
aoqi@0 | 446 | fprintf(stderr, "disabling multipage support.\n"); |
aoqi@0 | 447 | } |
aoqi@0 | 448 | g_multipage_error = ERROR_MP_VMGETINFO_FAILED; |
aoqi@0 | 449 | _can_use_64K_pages = _can_use_16M_pages = 0; |
aoqi@0 | 450 | goto query_multipage_support_end; |
aoqi@0 | 451 | } |
aoqi@0 | 452 | guarantee(num_psizes > 0, "vmgetinfo(.., VMINFO_GETPSIZES, ...) failed."); |
aoqi@0 | 453 | assert(num_psizes <= MAX_PAGE_SIZES, "Surprise! more than 4 page sizes?"); |
aoqi@0 | 454 | if (Verbose) { |
aoqi@0 | 455 | fprintf(stderr, "vmgetinfo(.., VMINFO_GETPSIZES, ...) returns %d supported page sizes: ", num_psizes); |
aoqi@0 | 456 | for (int i = 0; i < num_psizes; i ++) { |
aoqi@0 | 457 | fprintf(stderr, " %s ", describe_pagesize(sizes[i])); |
aoqi@0 | 458 | } |
aoqi@0 | 459 | fprintf(stderr, " .\n"); |
aoqi@0 | 460 | } |
aoqi@0 | 461 | |
aoqi@0 | 462 | // Can we use 64K, 16M pages? |
aoqi@0 | 463 | _can_use_64K_pages = 0; |
aoqi@0 | 464 | _can_use_16M_pages = 0; |
aoqi@0 | 465 | for (int i = 0; i < num_psizes; i ++) { |
aoqi@0 | 466 | if (sizes[i] == SIZE_64K) { |
aoqi@0 | 467 | _can_use_64K_pages = 1; |
aoqi@0 | 468 | } else if (sizes[i] == SIZE_16M) { |
aoqi@0 | 469 | _can_use_16M_pages = 1; |
aoqi@0 | 470 | } |
aoqi@0 | 471 | } |
aoqi@0 | 472 | |
aoqi@0 | 473 | if (!_can_use_64K_pages) { |
aoqi@0 | 474 | g_multipage_error = ERROR_MP_VMGETINFO_CLAIMS_NO_SUPPORT_FOR_64K; |
aoqi@0 | 475 | } |
aoqi@0 | 476 | |
aoqi@0 | 477 | // Double-check for 16M pages: Even if AIX claims to be able to use 16M pages, |
aoqi@0 | 478 | // there must be an actual 16M page pool, and we must run with enough rights. |
aoqi@0 | 479 | if (_can_use_16M_pages) { |
aoqi@0 | 480 | const int shmid = ::shmget(IPC_PRIVATE, SIZE_16M, IPC_CREAT | S_IRUSR | S_IWUSR); |
aoqi@0 | 481 | guarantee(shmid != -1, "shmget failed"); |
aoqi@0 | 482 | struct shmid_ds shm_buf = { 0 }; |
aoqi@0 | 483 | shm_buf.shm_pagesize = SIZE_16M; |
aoqi@0 | 484 | const bool can_set_pagesize = ::shmctl(shmid, SHM_PAGESIZE, &shm_buf) == 0 ? true : false; |
aoqi@0 | 485 | const int en = errno; |
aoqi@0 | 486 | ::shmctl(shmid, IPC_RMID, NULL); |
aoqi@0 | 487 | if (!can_set_pagesize) { |
aoqi@0 | 488 | if (Verbose) { |
aoqi@0 | 489 | fprintf(stderr, "Failed to allocate even one misely 16M page. shmctl failed with %d (%s).\n" |
aoqi@0 | 490 | "Will deactivate 16M support.\n", en, strerror(en)); |
aoqi@0 | 491 | } |
aoqi@0 | 492 | _can_use_16M_pages = 0; |
aoqi@0 | 493 | } |
aoqi@0 | 494 | } |
aoqi@0 | 495 | |
aoqi@0 | 496 | } // end: check which pages can be used for shared memory |
aoqi@0 | 497 | |
aoqi@0 | 498 | query_multipage_support_end: |
aoqi@0 | 499 | |
aoqi@0 | 500 | guarantee(_page_size != -1 && |
aoqi@0 | 501 | _stack_page_size != -1 && |
aoqi@0 | 502 | _can_use_64K_pages != -1 && |
aoqi@0 | 503 | _can_use_16M_pages != -1, "Page sizes not properly initialized"); |
aoqi@0 | 504 | |
aoqi@0 | 505 | if (_can_use_64K_pages) { |
aoqi@0 | 506 | g_multipage_error = 0; |
aoqi@0 | 507 | } |
aoqi@0 | 508 | |
aoqi@0 | 509 | if (Verbose) { |
aoqi@0 | 510 | fprintf(stderr, "Data page size (C-Heap, bss, etc): %s\n", describe_pagesize(data_page_size)); |
aoqi@0 | 511 | fprintf(stderr, "Thread stack page size (pthread): %s\n", describe_pagesize(_stack_page_size)); |
aoqi@0 | 512 | fprintf(stderr, "Default shared memory page size: %s\n", describe_pagesize(_shm_default_page_size)); |
aoqi@0 | 513 | fprintf(stderr, "Can use 64K pages dynamically with shared meory: %s\n", (_can_use_64K_pages ? "yes" :"no")); |
aoqi@0 | 514 | fprintf(stderr, "Can use 16M pages dynamically with shared memory: %s\n", (_can_use_16M_pages ? "yes" :"no")); |
aoqi@0 | 515 | fprintf(stderr, "Multipage error details: %d\n", g_multipage_error); |
aoqi@0 | 516 | } |
aoqi@0 | 517 | |
aoqi@0 | 518 | } // end os::Aix::query_multipage_support() |
aoqi@0 | 519 | |
aoqi@0 | 520 | void os::init_system_properties_values() { |
aoqi@0 | 521 | |
aoqi@0 | 522 | #define DEFAULT_LIBPATH "/usr/lib:/lib" |
aoqi@0 | 523 | #define EXTENSIONS_DIR "/lib/ext" |
aoqi@0 | 524 | #define ENDORSED_DIR "/lib/endorsed" |
aoqi@0 | 525 | |
aoqi@0 | 526 | // Buffer that fits several sprintfs. |
aoqi@0 | 527 | // Note that the space for the trailing null is provided |
aoqi@0 | 528 | // by the nulls included by the sizeof operator. |
aoqi@0 | 529 | const size_t bufsize = |
aoqi@0 | 530 | MAX3((size_t)MAXPATHLEN, // For dll_dir & friends. |
aoqi@0 | 531 | (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR), // extensions dir |
aoqi@0 | 532 | (size_t)MAXPATHLEN + sizeof(ENDORSED_DIR)); // endorsed dir |
aoqi@0 | 533 | char *buf = (char *)NEW_C_HEAP_ARRAY(char, bufsize, mtInternal); |
aoqi@0 | 534 | |
aoqi@0 | 535 | // sysclasspath, java_home, dll_dir |
aoqi@0 | 536 | { |
aoqi@0 | 537 | char *pslash; |
aoqi@0 | 538 | os::jvm_path(buf, bufsize); |
aoqi@0 | 539 | |
aoqi@0 | 540 | // Found the full path to libjvm.so. |
aoqi@0 | 541 | // Now cut the path to <java_home>/jre if we can. |
aoqi@0 | 542 | *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so. |
aoqi@0 | 543 | pslash = strrchr(buf, '/'); |
aoqi@0 | 544 | if (pslash != NULL) { |
aoqi@0 | 545 | *pslash = '\0'; // Get rid of /{client|server|hotspot}. |
aoqi@0 | 546 | } |
aoqi@0 | 547 | Arguments::set_dll_dir(buf); |
aoqi@0 | 548 | |
aoqi@0 | 549 | if (pslash != NULL) { |
aoqi@0 | 550 | pslash = strrchr(buf, '/'); |
aoqi@0 | 551 | if (pslash != NULL) { |
aoqi@0 | 552 | *pslash = '\0'; // Get rid of /<arch>. |
aoqi@0 | 553 | pslash = strrchr(buf, '/'); |
aoqi@0 | 554 | if (pslash != NULL) { |
aoqi@0 | 555 | *pslash = '\0'; // Get rid of /lib. |
aoqi@0 | 556 | } |
aoqi@0 | 557 | } |
aoqi@0 | 558 | } |
aoqi@0 | 559 | Arguments::set_java_home(buf); |
aoqi@0 | 560 | set_boot_path('/', ':'); |
aoqi@0 | 561 | } |
aoqi@0 | 562 | |
aoqi@0 | 563 | // Where to look for native libraries. |
aoqi@0 | 564 | |
aoqi@0 | 565 | // On Aix we get the user setting of LIBPATH. |
aoqi@0 | 566 | // Eventually, all the library path setting will be done here. |
aoqi@0 | 567 | // Get the user setting of LIBPATH. |
aoqi@0 | 568 | const char *v = ::getenv("LIBPATH"); |
aoqi@0 | 569 | const char *v_colon = ":"; |
aoqi@0 | 570 | if (v == NULL) { v = ""; v_colon = ""; } |
aoqi@0 | 571 | |
aoqi@0 | 572 | // Concatenate user and invariant part of ld_library_path. |
aoqi@0 | 573 | // That's +1 for the colon and +1 for the trailing '\0'. |
aoqi@0 | 574 | char *ld_library_path = (char *)NEW_C_HEAP_ARRAY(char, strlen(v) + 1 + sizeof(DEFAULT_LIBPATH) + 1, mtInternal); |
aoqi@0 | 575 | sprintf(ld_library_path, "%s%s" DEFAULT_LIBPATH, v, v_colon); |
aoqi@0 | 576 | Arguments::set_library_path(ld_library_path); |
aoqi@0 | 577 | FREE_C_HEAP_ARRAY(char, ld_library_path, mtInternal); |
aoqi@0 | 578 | |
aoqi@0 | 579 | // Extensions directories. |
aoqi@0 | 580 | sprintf(buf, "%s" EXTENSIONS_DIR, Arguments::get_java_home()); |
aoqi@0 | 581 | Arguments::set_ext_dirs(buf); |
aoqi@0 | 582 | |
aoqi@0 | 583 | // Endorsed standards default directory. |
aoqi@0 | 584 | sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); |
aoqi@0 | 585 | Arguments::set_endorsed_dirs(buf); |
aoqi@0 | 586 | |
aoqi@0 | 587 | FREE_C_HEAP_ARRAY(char, buf, mtInternal); |
aoqi@0 | 588 | |
aoqi@0 | 589 | #undef DEFAULT_LIBPATH |
aoqi@0 | 590 | #undef EXTENSIONS_DIR |
aoqi@0 | 591 | #undef ENDORSED_DIR |
aoqi@0 | 592 | } |
aoqi@0 | 593 | |
aoqi@0 | 594 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 595 | // breakpoint support |
aoqi@0 | 596 | |
aoqi@0 | 597 | void os::breakpoint() { |
aoqi@0 | 598 | BREAKPOINT; |
aoqi@0 | 599 | } |
aoqi@0 | 600 | |
aoqi@0 | 601 | extern "C" void breakpoint() { |
aoqi@0 | 602 | // use debugger to set breakpoint here |
aoqi@0 | 603 | } |
aoqi@0 | 604 | |
aoqi@0 | 605 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 606 | // signal support |
aoqi@0 | 607 | |
aoqi@0 | 608 | debug_only(static bool signal_sets_initialized = false); |
aoqi@0 | 609 | static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; |
aoqi@0 | 610 | |
aoqi@0 | 611 | bool os::Aix::is_sig_ignored(int sig) { |
aoqi@0 | 612 | struct sigaction oact; |
aoqi@0 | 613 | sigaction(sig, (struct sigaction*)NULL, &oact); |
aoqi@0 | 614 | void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) |
aoqi@0 | 615 | : CAST_FROM_FN_PTR(void*, oact.sa_handler); |
goetz@7424 | 616 | if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) { |
aoqi@0 | 617 | return true; |
goetz@7424 | 618 | } else { |
aoqi@0 | 619 | return false; |
goetz@7424 | 620 | } |
aoqi@0 | 621 | } |
aoqi@0 | 622 | |
aoqi@0 | 623 | void os::Aix::signal_sets_init() { |
aoqi@0 | 624 | // Should also have an assertion stating we are still single-threaded. |
aoqi@0 | 625 | assert(!signal_sets_initialized, "Already initialized"); |
aoqi@0 | 626 | // Fill in signals that are necessarily unblocked for all threads in |
aoqi@0 | 627 | // the VM. Currently, we unblock the following signals: |
aoqi@0 | 628 | // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden |
aoqi@0 | 629 | // by -Xrs (=ReduceSignalUsage)); |
aoqi@0 | 630 | // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all |
aoqi@0 | 631 | // other threads. The "ReduceSignalUsage" boolean tells us not to alter |
aoqi@0 | 632 | // the dispositions or masks wrt these signals. |
aoqi@0 | 633 | // Programs embedding the VM that want to use the above signals for their |
aoqi@0 | 634 | // own purposes must, at this time, use the "-Xrs" option to prevent |
aoqi@0 | 635 | // interference with shutdown hooks and BREAK_SIGNAL thread dumping. |
aoqi@0 | 636 | // (See bug 4345157, and other related bugs). |
aoqi@0 | 637 | // In reality, though, unblocking these signals is really a nop, since |
aoqi@0 | 638 | // these signals are not blocked by default. |
aoqi@0 | 639 | sigemptyset(&unblocked_sigs); |
aoqi@0 | 640 | sigemptyset(&allowdebug_blocked_sigs); |
aoqi@0 | 641 | sigaddset(&unblocked_sigs, SIGILL); |
aoqi@0 | 642 | sigaddset(&unblocked_sigs, SIGSEGV); |
aoqi@0 | 643 | sigaddset(&unblocked_sigs, SIGBUS); |
aoqi@0 | 644 | sigaddset(&unblocked_sigs, SIGFPE); |
aoqi@0 | 645 | sigaddset(&unblocked_sigs, SIGTRAP); |
aoqi@0 | 646 | sigaddset(&unblocked_sigs, SIGDANGER); |
aoqi@0 | 647 | sigaddset(&unblocked_sigs, SR_signum); |
aoqi@0 | 648 | |
aoqi@0 | 649 | if (!ReduceSignalUsage) { |
aoqi@0 | 650 | if (!os::Aix::is_sig_ignored(SHUTDOWN1_SIGNAL)) { |
aoqi@0 | 651 | sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); |
aoqi@0 | 652 | sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); |
aoqi@0 | 653 | } |
aoqi@0 | 654 | if (!os::Aix::is_sig_ignored(SHUTDOWN2_SIGNAL)) { |
aoqi@0 | 655 | sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); |
aoqi@0 | 656 | sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); |
aoqi@0 | 657 | } |
aoqi@0 | 658 | if (!os::Aix::is_sig_ignored(SHUTDOWN3_SIGNAL)) { |
aoqi@0 | 659 | sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); |
aoqi@0 | 660 | sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); |
aoqi@0 | 661 | } |
aoqi@0 | 662 | } |
aoqi@0 | 663 | // Fill in signals that are blocked by all but the VM thread. |
aoqi@0 | 664 | sigemptyset(&vm_sigs); |
aoqi@0 | 665 | if (!ReduceSignalUsage) |
aoqi@0 | 666 | sigaddset(&vm_sigs, BREAK_SIGNAL); |
aoqi@0 | 667 | debug_only(signal_sets_initialized = true); |
aoqi@0 | 668 | } |
aoqi@0 | 669 | |
aoqi@0 | 670 | // These are signals that are unblocked while a thread is running Java. |
aoqi@0 | 671 | // (For some reason, they get blocked by default.) |
aoqi@0 | 672 | sigset_t* os::Aix::unblocked_signals() { |
aoqi@0 | 673 | assert(signal_sets_initialized, "Not initialized"); |
aoqi@0 | 674 | return &unblocked_sigs; |
aoqi@0 | 675 | } |
aoqi@0 | 676 | |
aoqi@0 | 677 | // These are the signals that are blocked while a (non-VM) thread is |
aoqi@0 | 678 | // running Java. Only the VM thread handles these signals. |
aoqi@0 | 679 | sigset_t* os::Aix::vm_signals() { |
aoqi@0 | 680 | assert(signal_sets_initialized, "Not initialized"); |
aoqi@0 | 681 | return &vm_sigs; |
aoqi@0 | 682 | } |
aoqi@0 | 683 | |
aoqi@0 | 684 | // These are signals that are blocked during cond_wait to allow debugger in |
aoqi@0 | 685 | sigset_t* os::Aix::allowdebug_blocked_signals() { |
aoqi@0 | 686 | assert(signal_sets_initialized, "Not initialized"); |
aoqi@0 | 687 | return &allowdebug_blocked_sigs; |
aoqi@0 | 688 | } |
aoqi@0 | 689 | |
aoqi@0 | 690 | void os::Aix::hotspot_sigmask(Thread* thread) { |
aoqi@0 | 691 | |
aoqi@0 | 692 | //Save caller's signal mask before setting VM signal mask |
aoqi@0 | 693 | sigset_t caller_sigmask; |
aoqi@0 | 694 | pthread_sigmask(SIG_BLOCK, NULL, &caller_sigmask); |
aoqi@0 | 695 | |
aoqi@0 | 696 | OSThread* osthread = thread->osthread(); |
aoqi@0 | 697 | osthread->set_caller_sigmask(caller_sigmask); |
aoqi@0 | 698 | |
aoqi@0 | 699 | pthread_sigmask(SIG_UNBLOCK, os::Aix::unblocked_signals(), NULL); |
aoqi@0 | 700 | |
aoqi@0 | 701 | if (!ReduceSignalUsage) { |
aoqi@0 | 702 | if (thread->is_VM_thread()) { |
aoqi@0 | 703 | // Only the VM thread handles BREAK_SIGNAL ... |
aoqi@0 | 704 | pthread_sigmask(SIG_UNBLOCK, vm_signals(), NULL); |
aoqi@0 | 705 | } else { |
aoqi@0 | 706 | // ... all other threads block BREAK_SIGNAL |
aoqi@0 | 707 | pthread_sigmask(SIG_BLOCK, vm_signals(), NULL); |
aoqi@0 | 708 | } |
aoqi@0 | 709 | } |
aoqi@0 | 710 | } |
aoqi@0 | 711 | |
aoqi@0 | 712 | // retrieve memory information. |
aoqi@0 | 713 | // Returns false if something went wrong; |
aoqi@0 | 714 | // content of pmi undefined in this case. |
aoqi@0 | 715 | bool os::Aix::get_meminfo(meminfo_t* pmi) { |
aoqi@0 | 716 | |
aoqi@0 | 717 | assert(pmi, "get_meminfo: invalid parameter"); |
aoqi@0 | 718 | |
aoqi@0 | 719 | memset(pmi, 0, sizeof(meminfo_t)); |
aoqi@0 | 720 | |
aoqi@0 | 721 | if (os::Aix::on_pase()) { |
aoqi@0 | 722 | |
aoqi@0 | 723 | Unimplemented(); |
aoqi@0 | 724 | return false; |
aoqi@0 | 725 | |
aoqi@0 | 726 | } else { |
aoqi@0 | 727 | |
aoqi@0 | 728 | // On AIX, I use the (dynamically loaded) perfstat library to retrieve memory statistics |
aoqi@0 | 729 | // See: |
aoqi@0 | 730 | // http://publib.boulder.ibm.com/infocenter/systems/index.jsp |
aoqi@0 | 731 | // ?topic=/com.ibm.aix.basetechref/doc/basetrf1/perfstat_memtot.htm |
aoqi@0 | 732 | // http://publib.boulder.ibm.com/infocenter/systems/index.jsp |
aoqi@0 | 733 | // ?topic=/com.ibm.aix.files/doc/aixfiles/libperfstat.h.htm |
aoqi@0 | 734 | |
aoqi@0 | 735 | perfstat_memory_total_t psmt; |
aoqi@0 | 736 | memset (&psmt, '\0', sizeof(psmt)); |
aoqi@0 | 737 | const int rc = libperfstat::perfstat_memory_total(NULL, &psmt, sizeof(psmt), 1); |
aoqi@0 | 738 | if (rc == -1) { |
aoqi@0 | 739 | fprintf(stderr, "perfstat_memory_total() failed (errno=%d)\n", errno); |
aoqi@0 | 740 | assert(0, "perfstat_memory_total() failed"); |
aoqi@0 | 741 | return false; |
aoqi@0 | 742 | } |
aoqi@0 | 743 | |
aoqi@0 | 744 | assert(rc == 1, "perfstat_memory_total() - weird return code"); |
aoqi@0 | 745 | |
aoqi@0 | 746 | // excerpt from |
aoqi@0 | 747 | // http://publib.boulder.ibm.com/infocenter/systems/index.jsp |
aoqi@0 | 748 | // ?topic=/com.ibm.aix.files/doc/aixfiles/libperfstat.h.htm |
aoqi@0 | 749 | // The fields of perfstat_memory_total_t: |
aoqi@0 | 750 | // u_longlong_t virt_total Total virtual memory (in 4 KB pages). |
aoqi@0 | 751 | // u_longlong_t real_total Total real memory (in 4 KB pages). |
aoqi@0 | 752 | // u_longlong_t real_free Free real memory (in 4 KB pages). |
aoqi@0 | 753 | // u_longlong_t pgsp_total Total paging space (in 4 KB pages). |
aoqi@0 | 754 | // u_longlong_t pgsp_free Free paging space (in 4 KB pages). |
aoqi@0 | 755 | |
aoqi@0 | 756 | pmi->virt_total = psmt.virt_total * 4096; |
aoqi@0 | 757 | pmi->real_total = psmt.real_total * 4096; |
aoqi@0 | 758 | pmi->real_free = psmt.real_free * 4096; |
aoqi@0 | 759 | pmi->pgsp_total = psmt.pgsp_total * 4096; |
aoqi@0 | 760 | pmi->pgsp_free = psmt.pgsp_free * 4096; |
aoqi@0 | 761 | |
aoqi@0 | 762 | return true; |
aoqi@0 | 763 | |
aoqi@0 | 764 | } |
aoqi@0 | 765 | } // end os::Aix::get_meminfo |
aoqi@0 | 766 | |
aoqi@0 | 767 | // Retrieve global cpu information. |
aoqi@0 | 768 | // Returns false if something went wrong; |
aoqi@0 | 769 | // the content of pci is undefined in this case. |
aoqi@0 | 770 | bool os::Aix::get_cpuinfo(cpuinfo_t* pci) { |
aoqi@0 | 771 | assert(pci, "get_cpuinfo: invalid parameter"); |
aoqi@0 | 772 | memset(pci, 0, sizeof(cpuinfo_t)); |
aoqi@0 | 773 | |
aoqi@0 | 774 | perfstat_cpu_total_t psct; |
aoqi@0 | 775 | memset (&psct, '\0', sizeof(psct)); |
aoqi@0 | 776 | |
aoqi@0 | 777 | if (-1 == libperfstat::perfstat_cpu_total(NULL, &psct, sizeof(perfstat_cpu_total_t), 1)) { |
aoqi@0 | 778 | fprintf(stderr, "perfstat_cpu_total() failed (errno=%d)\n", errno); |
aoqi@0 | 779 | assert(0, "perfstat_cpu_total() failed"); |
aoqi@0 | 780 | return false; |
aoqi@0 | 781 | } |
aoqi@0 | 782 | |
aoqi@0 | 783 | // global cpu information |
aoqi@0 | 784 | strcpy (pci->description, psct.description); |
aoqi@0 | 785 | pci->processorHZ = psct.processorHZ; |
aoqi@0 | 786 | pci->ncpus = psct.ncpus; |
aoqi@0 | 787 | os::Aix::_logical_cpus = psct.ncpus; |
aoqi@0 | 788 | for (int i = 0; i < 3; i++) { |
aoqi@0 | 789 | pci->loadavg[i] = (double) psct.loadavg[i] / (1 << SBITS); |
aoqi@0 | 790 | } |
aoqi@0 | 791 | |
aoqi@0 | 792 | // get the processor version from _system_configuration |
aoqi@0 | 793 | switch (_system_configuration.version) { |
goetz@7424 | 794 | case PV_8: |
goetz@7424 | 795 | strcpy(pci->version, "Power PC 8"); |
goetz@7424 | 796 | break; |
aoqi@0 | 797 | case PV_7: |
aoqi@0 | 798 | strcpy(pci->version, "Power PC 7"); |
aoqi@0 | 799 | break; |
aoqi@0 | 800 | case PV_6_1: |
aoqi@0 | 801 | strcpy(pci->version, "Power PC 6 DD1.x"); |
aoqi@0 | 802 | break; |
aoqi@0 | 803 | case PV_6: |
aoqi@0 | 804 | strcpy(pci->version, "Power PC 6"); |
aoqi@0 | 805 | break; |
aoqi@0 | 806 | case PV_5: |
aoqi@0 | 807 | strcpy(pci->version, "Power PC 5"); |
aoqi@0 | 808 | break; |
aoqi@0 | 809 | case PV_5_2: |
aoqi@0 | 810 | strcpy(pci->version, "Power PC 5_2"); |
aoqi@0 | 811 | break; |
aoqi@0 | 812 | case PV_5_3: |
aoqi@0 | 813 | strcpy(pci->version, "Power PC 5_3"); |
aoqi@0 | 814 | break; |
aoqi@0 | 815 | case PV_5_Compat: |
aoqi@0 | 816 | strcpy(pci->version, "PV_5_Compat"); |
aoqi@0 | 817 | break; |
aoqi@0 | 818 | case PV_6_Compat: |
aoqi@0 | 819 | strcpy(pci->version, "PV_6_Compat"); |
aoqi@0 | 820 | break; |
aoqi@0 | 821 | case PV_7_Compat: |
aoqi@0 | 822 | strcpy(pci->version, "PV_7_Compat"); |
aoqi@0 | 823 | break; |
goetz@7424 | 824 | case PV_8_Compat: |
goetz@7424 | 825 | strcpy(pci->version, "PV_8_Compat"); |
goetz@7424 | 826 | break; |
aoqi@0 | 827 | default: |
aoqi@0 | 828 | strcpy(pci->version, "unknown"); |
aoqi@0 | 829 | } |
aoqi@0 | 830 | |
aoqi@0 | 831 | return true; |
aoqi@0 | 832 | |
aoqi@0 | 833 | } //end os::Aix::get_cpuinfo |
aoqi@0 | 834 | |
aoqi@0 | 835 | ////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 836 | // detecting pthread library |
aoqi@0 | 837 | |
aoqi@0 | 838 | void os::Aix::libpthread_init() { |
aoqi@0 | 839 | return; |
aoqi@0 | 840 | } |
aoqi@0 | 841 | |
aoqi@0 | 842 | ////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 843 | // create new thread |
aoqi@0 | 844 | |
aoqi@0 | 845 | // Thread start routine for all newly created threads |
aoqi@0 | 846 | static void *java_start(Thread *thread) { |
aoqi@0 | 847 | |
aoqi@0 | 848 | // find out my own stack dimensions |
aoqi@0 | 849 | { |
aoqi@0 | 850 | // actually, this should do exactly the same as thread->record_stack_base_and_size... |
aoqi@0 | 851 | address base = 0; |
aoqi@0 | 852 | size_t size = 0; |
aoqi@0 | 853 | query_stack_dimensions(&base, &size); |
aoqi@0 | 854 | thread->set_stack_base(base); |
aoqi@0 | 855 | thread->set_stack_size(size); |
aoqi@0 | 856 | } |
aoqi@0 | 857 | |
aoqi@0 | 858 | // Do some sanity checks. |
aoqi@0 | 859 | CHECK_CURRENT_STACK_PTR(thread->stack_base(), thread->stack_size()); |
aoqi@0 | 860 | |
aoqi@0 | 861 | // Try to randomize the cache line index of hot stack frames. |
aoqi@0 | 862 | // This helps when threads of the same stack traces evict each other's |
aoqi@0 | 863 | // cache lines. The threads can be either from the same JVM instance, or |
aoqi@0 | 864 | // from different JVM instances. The benefit is especially true for |
aoqi@0 | 865 | // processors with hyperthreading technology. |
aoqi@0 | 866 | |
aoqi@0 | 867 | static int counter = 0; |
aoqi@0 | 868 | int pid = os::current_process_id(); |
aoqi@0 | 869 | alloca(((pid ^ counter++) & 7) * 128); |
aoqi@0 | 870 | |
aoqi@0 | 871 | ThreadLocalStorage::set_thread(thread); |
aoqi@0 | 872 | |
aoqi@0 | 873 | OSThread* osthread = thread->osthread(); |
aoqi@0 | 874 | |
aoqi@0 | 875 | // thread_id is kernel thread id (similar to Solaris LWP id) |
aoqi@0 | 876 | osthread->set_thread_id(os::Aix::gettid()); |
aoqi@0 | 877 | |
aoqi@0 | 878 | // initialize signal mask for this thread |
aoqi@0 | 879 | os::Aix::hotspot_sigmask(thread); |
aoqi@0 | 880 | |
aoqi@0 | 881 | // initialize floating point control register |
aoqi@0 | 882 | os::Aix::init_thread_fpu_state(); |
aoqi@0 | 883 | |
aoqi@0 | 884 | assert(osthread->get_state() == RUNNABLE, "invalid os thread state"); |
aoqi@0 | 885 | |
aoqi@0 | 886 | // call one more level start routine |
aoqi@0 | 887 | thread->run(); |
aoqi@0 | 888 | |
aoqi@0 | 889 | return 0; |
aoqi@0 | 890 | } |
aoqi@0 | 891 | |
aoqi@0 | 892 | bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { |
aoqi@0 | 893 | |
aoqi@0 | 894 | // We want the whole function to be synchronized. |
aoqi@0 | 895 | ThreadCritical cs; |
aoqi@0 | 896 | |
aoqi@0 | 897 | assert(thread->osthread() == NULL, "caller responsible"); |
aoqi@0 | 898 | |
aoqi@0 | 899 | // Allocate the OSThread object |
aoqi@0 | 900 | OSThread* osthread = new OSThread(NULL, NULL); |
aoqi@0 | 901 | if (osthread == NULL) { |
aoqi@0 | 902 | return false; |
aoqi@0 | 903 | } |
aoqi@0 | 904 | |
aoqi@0 | 905 | // set the correct thread state |
aoqi@0 | 906 | osthread->set_thread_type(thr_type); |
aoqi@0 | 907 | |
aoqi@0 | 908 | // Initial state is ALLOCATED but not INITIALIZED |
aoqi@0 | 909 | osthread->set_state(ALLOCATED); |
aoqi@0 | 910 | |
aoqi@0 | 911 | thread->set_osthread(osthread); |
aoqi@0 | 912 | |
aoqi@0 | 913 | // init thread attributes |
aoqi@0 | 914 | pthread_attr_t attr; |
aoqi@0 | 915 | pthread_attr_init(&attr); |
aoqi@0 | 916 | guarantee(pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED) == 0, "???"); |
aoqi@0 | 917 | |
aoqi@0 | 918 | // Make sure we run in 1:1 kernel-user-thread mode. |
aoqi@0 | 919 | if (os::Aix::on_aix()) { |
aoqi@0 | 920 | guarantee(pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM) == 0, "???"); |
aoqi@0 | 921 | guarantee(pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED) == 0, "???"); |
aoqi@0 | 922 | } // end: aix |
aoqi@0 | 923 | |
aoqi@0 | 924 | // Start in suspended state, and in os::thread_start, wake the thread up. |
aoqi@0 | 925 | guarantee(pthread_attr_setsuspendstate_np(&attr, PTHREAD_CREATE_SUSPENDED_NP) == 0, "???"); |
aoqi@0 | 926 | |
aoqi@0 | 927 | // calculate stack size if it's not specified by caller |
aoqi@0 | 928 | if (os::Aix::supports_variable_stack_size()) { |
aoqi@0 | 929 | if (stack_size == 0) { |
aoqi@0 | 930 | stack_size = os::Aix::default_stack_size(thr_type); |
aoqi@0 | 931 | |
aoqi@0 | 932 | switch (thr_type) { |
aoqi@0 | 933 | case os::java_thread: |
aoqi@0 | 934 | // Java threads use ThreadStackSize whose default value can be changed with the flag -Xss. |
aoqi@0 | 935 | assert(JavaThread::stack_size_at_create() > 0, "this should be set"); |
aoqi@0 | 936 | stack_size = JavaThread::stack_size_at_create(); |
aoqi@0 | 937 | break; |
aoqi@0 | 938 | case os::compiler_thread: |
aoqi@0 | 939 | if (CompilerThreadStackSize > 0) { |
aoqi@0 | 940 | stack_size = (size_t)(CompilerThreadStackSize * K); |
aoqi@0 | 941 | break; |
aoqi@0 | 942 | } // else fall through: |
aoqi@0 | 943 | // use VMThreadStackSize if CompilerThreadStackSize is not defined |
aoqi@0 | 944 | case os::vm_thread: |
aoqi@0 | 945 | case os::pgc_thread: |
aoqi@0 | 946 | case os::cgc_thread: |
aoqi@0 | 947 | case os::watcher_thread: |
aoqi@0 | 948 | if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); |
aoqi@0 | 949 | break; |
aoqi@0 | 950 | } |
aoqi@0 | 951 | } |
aoqi@0 | 952 | |
aoqi@0 | 953 | stack_size = MAX2(stack_size, os::Aix::min_stack_allowed); |
aoqi@0 | 954 | pthread_attr_setstacksize(&attr, stack_size); |
aoqi@0 | 955 | } //else let thread_create() pick the default value (96 K on AIX) |
aoqi@0 | 956 | |
aoqi@0 | 957 | pthread_t tid; |
aoqi@0 | 958 | int ret = pthread_create(&tid, &attr, (void* (*)(void*)) java_start, thread); |
aoqi@0 | 959 | |
aoqi@0 | 960 | pthread_attr_destroy(&attr); |
aoqi@0 | 961 | |
goetz@7424 | 962 | if (ret == 0) { |
goetz@7424 | 963 | // PPC port traceOsMisc(("Created New Thread : pthread-id %u", tid)); |
goetz@7424 | 964 | } else { |
aoqi@0 | 965 | if (PrintMiscellaneous && (Verbose || WizardMode)) { |
aoqi@0 | 966 | perror("pthread_create()"); |
aoqi@0 | 967 | } |
aoqi@0 | 968 | // Need to clean up stuff we've allocated so far |
aoqi@0 | 969 | thread->set_osthread(NULL); |
aoqi@0 | 970 | delete osthread; |
aoqi@0 | 971 | return false; |
aoqi@0 | 972 | } |
aoqi@0 | 973 | |
aoqi@0 | 974 | // Store pthread info into the OSThread |
aoqi@0 | 975 | osthread->set_pthread_id(tid); |
aoqi@0 | 976 | |
aoqi@0 | 977 | return true; |
aoqi@0 | 978 | } |
aoqi@0 | 979 | |
aoqi@0 | 980 | ///////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 981 | // attach existing thread |
aoqi@0 | 982 | |
aoqi@0 | 983 | // bootstrap the main thread |
aoqi@0 | 984 | bool os::create_main_thread(JavaThread* thread) { |
aoqi@0 | 985 | assert(os::Aix::_main_thread == pthread_self(), "should be called inside main thread"); |
aoqi@0 | 986 | return create_attached_thread(thread); |
aoqi@0 | 987 | } |
aoqi@0 | 988 | |
aoqi@0 | 989 | bool os::create_attached_thread(JavaThread* thread) { |
aoqi@0 | 990 | #ifdef ASSERT |
aoqi@0 | 991 | thread->verify_not_published(); |
aoqi@0 | 992 | #endif |
aoqi@0 | 993 | |
aoqi@0 | 994 | // Allocate the OSThread object |
aoqi@0 | 995 | OSThread* osthread = new OSThread(NULL, NULL); |
aoqi@0 | 996 | |
aoqi@0 | 997 | if (osthread == NULL) { |
aoqi@0 | 998 | return false; |
aoqi@0 | 999 | } |
aoqi@0 | 1000 | |
aoqi@0 | 1001 | // Store pthread info into the OSThread |
aoqi@0 | 1002 | osthread->set_thread_id(os::Aix::gettid()); |
aoqi@0 | 1003 | osthread->set_pthread_id(::pthread_self()); |
aoqi@0 | 1004 | |
aoqi@0 | 1005 | // initialize floating point control register |
aoqi@0 | 1006 | os::Aix::init_thread_fpu_state(); |
aoqi@0 | 1007 | |
aoqi@0 | 1008 | // some sanity checks |
aoqi@0 | 1009 | CHECK_CURRENT_STACK_PTR(thread->stack_base(), thread->stack_size()); |
aoqi@0 | 1010 | |
aoqi@0 | 1011 | // Initial thread state is RUNNABLE |
aoqi@0 | 1012 | osthread->set_state(RUNNABLE); |
aoqi@0 | 1013 | |
aoqi@0 | 1014 | thread->set_osthread(osthread); |
aoqi@0 | 1015 | |
aoqi@0 | 1016 | if (UseNUMA) { |
aoqi@0 | 1017 | int lgrp_id = os::numa_get_group_id(); |
aoqi@0 | 1018 | if (lgrp_id != -1) { |
aoqi@0 | 1019 | thread->set_lgrp_id(lgrp_id); |
aoqi@0 | 1020 | } |
aoqi@0 | 1021 | } |
aoqi@0 | 1022 | |
aoqi@0 | 1023 | // initialize signal mask for this thread |
aoqi@0 | 1024 | // and save the caller's signal mask |
aoqi@0 | 1025 | os::Aix::hotspot_sigmask(thread); |
aoqi@0 | 1026 | |
aoqi@0 | 1027 | return true; |
aoqi@0 | 1028 | } |
aoqi@0 | 1029 | |
aoqi@0 | 1030 | void os::pd_start_thread(Thread* thread) { |
aoqi@0 | 1031 | int status = pthread_continue_np(thread->osthread()->pthread_id()); |
aoqi@0 | 1032 | assert(status == 0, "thr_continue failed"); |
aoqi@0 | 1033 | } |
aoqi@0 | 1034 | |
aoqi@0 | 1035 | // Free OS resources related to the OSThread |
aoqi@0 | 1036 | void os::free_thread(OSThread* osthread) { |
aoqi@0 | 1037 | assert(osthread != NULL, "osthread not set"); |
aoqi@0 | 1038 | |
aoqi@0 | 1039 | if (Thread::current()->osthread() == osthread) { |
aoqi@0 | 1040 | // Restore caller's signal mask |
aoqi@0 | 1041 | sigset_t sigmask = osthread->caller_sigmask(); |
aoqi@0 | 1042 | pthread_sigmask(SIG_SETMASK, &sigmask, NULL); |
aoqi@0 | 1043 | } |
aoqi@0 | 1044 | |
aoqi@0 | 1045 | delete osthread; |
aoqi@0 | 1046 | } |
aoqi@0 | 1047 | |
aoqi@0 | 1048 | ////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 1049 | // thread local storage |
aoqi@0 | 1050 | |
aoqi@0 | 1051 | int os::allocate_thread_local_storage() { |
aoqi@0 | 1052 | pthread_key_t key; |
aoqi@0 | 1053 | int rslt = pthread_key_create(&key, NULL); |
aoqi@0 | 1054 | assert(rslt == 0, "cannot allocate thread local storage"); |
aoqi@0 | 1055 | return (int)key; |
aoqi@0 | 1056 | } |
aoqi@0 | 1057 | |
aoqi@0 | 1058 | // Note: This is currently not used by VM, as we don't destroy TLS key |
aoqi@0 | 1059 | // on VM exit. |
aoqi@0 | 1060 | void os::free_thread_local_storage(int index) { |
aoqi@0 | 1061 | int rslt = pthread_key_delete((pthread_key_t)index); |
aoqi@0 | 1062 | assert(rslt == 0, "invalid index"); |
aoqi@0 | 1063 | } |
aoqi@0 | 1064 | |
aoqi@0 | 1065 | void os::thread_local_storage_at_put(int index, void* value) { |
aoqi@0 | 1066 | int rslt = pthread_setspecific((pthread_key_t)index, value); |
aoqi@0 | 1067 | assert(rslt == 0, "pthread_setspecific failed"); |
aoqi@0 | 1068 | } |
aoqi@0 | 1069 | |
aoqi@0 | 1070 | extern "C" Thread* get_thread() { |
aoqi@0 | 1071 | return ThreadLocalStorage::thread(); |
aoqi@0 | 1072 | } |
aoqi@0 | 1073 | |
aoqi@0 | 1074 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 1075 | // time support |
aoqi@0 | 1076 | |
aoqi@0 | 1077 | // Time since start-up in seconds to a fine granularity. |
aoqi@0 | 1078 | // Used by VMSelfDestructTimer and the MemProfiler. |
aoqi@0 | 1079 | double os::elapsedTime() { |
aoqi@0 | 1080 | return (double)(os::elapsed_counter()) * 0.000001; |
aoqi@0 | 1081 | } |
aoqi@0 | 1082 | |
aoqi@0 | 1083 | jlong os::elapsed_counter() { |
aoqi@0 | 1084 | timeval time; |
aoqi@0 | 1085 | int status = gettimeofday(&time, NULL); |
aoqi@0 | 1086 | return jlong(time.tv_sec) * 1000 * 1000 + jlong(time.tv_usec) - initial_time_count; |
aoqi@0 | 1087 | } |
aoqi@0 | 1088 | |
aoqi@0 | 1089 | jlong os::elapsed_frequency() { |
aoqi@0 | 1090 | return (1000 * 1000); |
aoqi@0 | 1091 | } |
aoqi@0 | 1092 | |
aoqi@0 | 1093 | // For now, we say that linux does not support vtime. I have no idea |
aoqi@0 | 1094 | // whether it can actually be made to (DLD, 9/13/05). |
aoqi@0 | 1095 | |
aoqi@0 | 1096 | bool os::supports_vtime() { return false; } |
aoqi@0 | 1097 | bool os::enable_vtime() { return false; } |
aoqi@0 | 1098 | bool os::vtime_enabled() { return false; } |
aoqi@0 | 1099 | double os::elapsedVTime() { |
aoqi@0 | 1100 | // better than nothing, but not much |
aoqi@0 | 1101 | return elapsedTime(); |
aoqi@0 | 1102 | } |
aoqi@0 | 1103 | |
aoqi@0 | 1104 | jlong os::javaTimeMillis() { |
aoqi@0 | 1105 | timeval time; |
aoqi@0 | 1106 | int status = gettimeofday(&time, NULL); |
aoqi@0 | 1107 | assert(status != -1, "aix error at gettimeofday()"); |
aoqi@0 | 1108 | return jlong(time.tv_sec) * 1000 + jlong(time.tv_usec / 1000); |
aoqi@0 | 1109 | } |
aoqi@0 | 1110 | |
aoqi@0 | 1111 | // We need to manually declare mread_real_time, |
aoqi@0 | 1112 | // because IBM didn't provide a prototype in time.h. |
aoqi@0 | 1113 | // (they probably only ever tested in C, not C++) |
aoqi@0 | 1114 | extern "C" |
aoqi@0 | 1115 | int mread_real_time(timebasestruct_t *t, size_t size_of_timebasestruct_t); |
aoqi@0 | 1116 | |
aoqi@0 | 1117 | jlong os::javaTimeNanos() { |
aoqi@0 | 1118 | if (os::Aix::on_pase()) { |
aoqi@0 | 1119 | Unimplemented(); |
aoqi@0 | 1120 | return 0; |
goetz@7424 | 1121 | } else { |
aoqi@0 | 1122 | // On AIX use the precision of processors real time clock |
aoqi@0 | 1123 | // or time base registers. |
aoqi@0 | 1124 | timebasestruct_t time; |
aoqi@0 | 1125 | int rc; |
aoqi@0 | 1126 | |
aoqi@0 | 1127 | // If the CPU has a time register, it will be used and |
aoqi@0 | 1128 | // we have to convert to real time first. After convertion we have following data: |
aoqi@0 | 1129 | // time.tb_high [seconds since 00:00:00 UTC on 1.1.1970] |
aoqi@0 | 1130 | // time.tb_low [nanoseconds after the last full second above] |
aoqi@0 | 1131 | // We better use mread_real_time here instead of read_real_time |
aoqi@0 | 1132 | // to ensure that we will get a monotonic increasing time. |
aoqi@0 | 1133 | if (mread_real_time(&time, TIMEBASE_SZ) != RTC_POWER) { |
aoqi@0 | 1134 | rc = time_base_to_time(&time, TIMEBASE_SZ); |
aoqi@0 | 1135 | assert(rc != -1, "aix error at time_base_to_time()"); |
aoqi@0 | 1136 | } |
aoqi@0 | 1137 | return jlong(time.tb_high) * (1000 * 1000 * 1000) + jlong(time.tb_low); |
aoqi@0 | 1138 | } |
aoqi@0 | 1139 | } |
aoqi@0 | 1140 | |
aoqi@0 | 1141 | void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { |
aoqi@0 | 1142 | { |
aoqi@0 | 1143 | // gettimeofday - based on time in seconds since the Epoch thus does not wrap |
aoqi@0 | 1144 | info_ptr->max_value = ALL_64_BITS; |
aoqi@0 | 1145 | |
aoqi@0 | 1146 | // gettimeofday is a real time clock so it skips |
aoqi@0 | 1147 | info_ptr->may_skip_backward = true; |
aoqi@0 | 1148 | info_ptr->may_skip_forward = true; |
aoqi@0 | 1149 | } |
aoqi@0 | 1150 | |
aoqi@0 | 1151 | info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time |
aoqi@0 | 1152 | } |
aoqi@0 | 1153 | |
aoqi@0 | 1154 | // Return the real, user, and system times in seconds from an |
aoqi@0 | 1155 | // arbitrary fixed point in the past. |
aoqi@0 | 1156 | bool os::getTimesSecs(double* process_real_time, |
aoqi@0 | 1157 | double* process_user_time, |
aoqi@0 | 1158 | double* process_system_time) { |
aoqi@0 | 1159 | struct tms ticks; |
aoqi@0 | 1160 | clock_t real_ticks = times(&ticks); |
aoqi@0 | 1161 | |
aoqi@0 | 1162 | if (real_ticks == (clock_t) (-1)) { |
aoqi@0 | 1163 | return false; |
aoqi@0 | 1164 | } else { |
aoqi@0 | 1165 | double ticks_per_second = (double) clock_tics_per_sec; |
aoqi@0 | 1166 | *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; |
aoqi@0 | 1167 | *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; |
aoqi@0 | 1168 | *process_real_time = ((double) real_ticks) / ticks_per_second; |
aoqi@0 | 1169 | |
aoqi@0 | 1170 | return true; |
aoqi@0 | 1171 | } |
aoqi@0 | 1172 | } |
aoqi@0 | 1173 | |
aoqi@0 | 1174 | char * os::local_time_string(char *buf, size_t buflen) { |
aoqi@0 | 1175 | struct tm t; |
aoqi@0 | 1176 | time_t long_time; |
aoqi@0 | 1177 | time(&long_time); |
aoqi@0 | 1178 | localtime_r(&long_time, &t); |
aoqi@0 | 1179 | jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", |
aoqi@0 | 1180 | t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, |
aoqi@0 | 1181 | t.tm_hour, t.tm_min, t.tm_sec); |
aoqi@0 | 1182 | return buf; |
aoqi@0 | 1183 | } |
aoqi@0 | 1184 | |
aoqi@0 | 1185 | struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { |
aoqi@0 | 1186 | return localtime_r(clock, res); |
aoqi@0 | 1187 | } |
aoqi@0 | 1188 | |
aoqi@0 | 1189 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 1190 | // runtime exit support |
aoqi@0 | 1191 | |
aoqi@0 | 1192 | // Note: os::shutdown() might be called very early during initialization, or |
aoqi@0 | 1193 | // called from signal handler. Before adding something to os::shutdown(), make |
aoqi@0 | 1194 | // sure it is async-safe and can handle partially initialized VM. |
aoqi@0 | 1195 | void os::shutdown() { |
aoqi@0 | 1196 | |
aoqi@0 | 1197 | // allow PerfMemory to attempt cleanup of any persistent resources |
aoqi@0 | 1198 | perfMemory_exit(); |
aoqi@0 | 1199 | |
aoqi@0 | 1200 | // needs to remove object in file system |
aoqi@0 | 1201 | AttachListener::abort(); |
aoqi@0 | 1202 | |
aoqi@0 | 1203 | // flush buffered output, finish log files |
aoqi@0 | 1204 | ostream_abort(); |
aoqi@0 | 1205 | |
aoqi@0 | 1206 | // Check for abort hook |
aoqi@0 | 1207 | abort_hook_t abort_hook = Arguments::abort_hook(); |
aoqi@0 | 1208 | if (abort_hook != NULL) { |
aoqi@0 | 1209 | abort_hook(); |
aoqi@0 | 1210 | } |
aoqi@0 | 1211 | } |
aoqi@0 | 1212 | |
aoqi@0 | 1213 | // Note: os::abort() might be called very early during initialization, or |
aoqi@0 | 1214 | // called from signal handler. Before adding something to os::abort(), make |
aoqi@0 | 1215 | // sure it is async-safe and can handle partially initialized VM. |
aoqi@0 | 1216 | void os::abort(bool dump_core) { |
aoqi@0 | 1217 | os::shutdown(); |
aoqi@0 | 1218 | if (dump_core) { |
aoqi@0 | 1219 | #ifndef PRODUCT |
aoqi@0 | 1220 | fdStream out(defaultStream::output_fd()); |
aoqi@0 | 1221 | out.print_raw("Current thread is "); |
aoqi@0 | 1222 | char buf[16]; |
aoqi@0 | 1223 | jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); |
aoqi@0 | 1224 | out.print_raw_cr(buf); |
aoqi@0 | 1225 | out.print_raw_cr("Dumping core ..."); |
aoqi@0 | 1226 | #endif |
aoqi@0 | 1227 | ::abort(); // dump core |
aoqi@0 | 1228 | } |
aoqi@0 | 1229 | |
aoqi@0 | 1230 | ::exit(1); |
aoqi@0 | 1231 | } |
aoqi@0 | 1232 | |
aoqi@0 | 1233 | // Die immediately, no exit hook, no abort hook, no cleanup. |
aoqi@0 | 1234 | void os::die() { |
aoqi@0 | 1235 | ::abort(); |
aoqi@0 | 1236 | } |
aoqi@0 | 1237 | |
aoqi@0 | 1238 | // This method is a copy of JDK's sysGetLastErrorString |
aoqi@0 | 1239 | // from src/solaris/hpi/src/system_md.c |
aoqi@0 | 1240 | |
aoqi@0 | 1241 | size_t os::lasterror(char *buf, size_t len) { |
goetz@7424 | 1242 | if (errno == 0) return 0; |
aoqi@0 | 1243 | |
aoqi@0 | 1244 | const char *s = ::strerror(errno); |
aoqi@0 | 1245 | size_t n = ::strlen(s); |
aoqi@0 | 1246 | if (n >= len) { |
aoqi@0 | 1247 | n = len - 1; |
aoqi@0 | 1248 | } |
aoqi@0 | 1249 | ::strncpy(buf, s, n); |
aoqi@0 | 1250 | buf[n] = '\0'; |
aoqi@0 | 1251 | return n; |
aoqi@0 | 1252 | } |
aoqi@0 | 1253 | |
aoqi@0 | 1254 | intx os::current_thread_id() { return (intx)pthread_self(); } |
goetz@7424 | 1255 | |
aoqi@0 | 1256 | int os::current_process_id() { |
aoqi@0 | 1257 | |
aoqi@0 | 1258 | // This implementation returns a unique pid, the pid of the |
aoqi@0 | 1259 | // launcher thread that starts the vm 'process'. |
aoqi@0 | 1260 | |
aoqi@0 | 1261 | // Under POSIX, getpid() returns the same pid as the |
aoqi@0 | 1262 | // launcher thread rather than a unique pid per thread. |
aoqi@0 | 1263 | // Use gettid() if you want the old pre NPTL behaviour. |
aoqi@0 | 1264 | |
aoqi@0 | 1265 | // if you are looking for the result of a call to getpid() that |
aoqi@0 | 1266 | // returns a unique pid for the calling thread, then look at the |
aoqi@0 | 1267 | // OSThread::thread_id() method in osThread_linux.hpp file |
aoqi@0 | 1268 | |
aoqi@0 | 1269 | return (int)(_initial_pid ? _initial_pid : getpid()); |
aoqi@0 | 1270 | } |
aoqi@0 | 1271 | |
aoqi@0 | 1272 | // DLL functions |
aoqi@0 | 1273 | |
aoqi@0 | 1274 | const char* os::dll_file_extension() { return ".so"; } |
aoqi@0 | 1275 | |
aoqi@0 | 1276 | // This must be hard coded because it's the system's temporary |
aoqi@0 | 1277 | // directory not the java application's temp directory, ala java.io.tmpdir. |
aoqi@0 | 1278 | const char* os::get_temp_directory() { return "/tmp"; } |
aoqi@0 | 1279 | |
aoqi@0 | 1280 | static bool file_exists(const char* filename) { |
aoqi@0 | 1281 | struct stat statbuf; |
aoqi@0 | 1282 | if (filename == NULL || strlen(filename) == 0) { |
aoqi@0 | 1283 | return false; |
aoqi@0 | 1284 | } |
aoqi@0 | 1285 | return os::stat(filename, &statbuf) == 0; |
aoqi@0 | 1286 | } |
aoqi@0 | 1287 | |
aoqi@0 | 1288 | bool os::dll_build_name(char* buffer, size_t buflen, |
aoqi@0 | 1289 | const char* pname, const char* fname) { |
aoqi@0 | 1290 | bool retval = false; |
aoqi@0 | 1291 | // Copied from libhpi |
aoqi@0 | 1292 | const size_t pnamelen = pname ? strlen(pname) : 0; |
aoqi@0 | 1293 | |
aoqi@0 | 1294 | // Return error on buffer overflow. |
aoqi@0 | 1295 | if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { |
aoqi@0 | 1296 | *buffer = '\0'; |
aoqi@0 | 1297 | return retval; |
aoqi@0 | 1298 | } |
aoqi@0 | 1299 | |
aoqi@0 | 1300 | if (pnamelen == 0) { |
aoqi@0 | 1301 | snprintf(buffer, buflen, "lib%s.so", fname); |
aoqi@0 | 1302 | retval = true; |
aoqi@0 | 1303 | } else if (strchr(pname, *os::path_separator()) != NULL) { |
aoqi@0 | 1304 | int n; |
aoqi@0 | 1305 | char** pelements = split_path(pname, &n); |
aoqi@0 | 1306 | for (int i = 0; i < n; i++) { |
aoqi@0 | 1307 | // Really shouldn't be NULL, but check can't hurt |
aoqi@0 | 1308 | if (pelements[i] == NULL || strlen(pelements[i]) == 0) { |
aoqi@0 | 1309 | continue; // skip the empty path values |
aoqi@0 | 1310 | } |
aoqi@0 | 1311 | snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); |
aoqi@0 | 1312 | if (file_exists(buffer)) { |
aoqi@0 | 1313 | retval = true; |
aoqi@0 | 1314 | break; |
aoqi@0 | 1315 | } |
aoqi@0 | 1316 | } |
aoqi@0 | 1317 | // release the storage |
aoqi@0 | 1318 | for (int i = 0; i < n; i++) { |
aoqi@0 | 1319 | if (pelements[i] != NULL) { |
aoqi@0 | 1320 | FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal); |
aoqi@0 | 1321 | } |
aoqi@0 | 1322 | } |
aoqi@0 | 1323 | if (pelements != NULL) { |
aoqi@0 | 1324 | FREE_C_HEAP_ARRAY(char*, pelements, mtInternal); |
aoqi@0 | 1325 | } |
aoqi@0 | 1326 | } else { |
aoqi@0 | 1327 | snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); |
aoqi@0 | 1328 | retval = true; |
aoqi@0 | 1329 | } |
aoqi@0 | 1330 | return retval; |
aoqi@0 | 1331 | } |
aoqi@0 | 1332 | |
aoqi@0 | 1333 | // Check if addr is inside libjvm.so. |
aoqi@0 | 1334 | bool os::address_is_in_vm(address addr) { |
aoqi@0 | 1335 | |
aoqi@0 | 1336 | // Input could be a real pc or a function pointer literal. The latter |
aoqi@0 | 1337 | // would be a function descriptor residing in the data segment of a module. |
aoqi@0 | 1338 | |
aoqi@0 | 1339 | const LoadedLibraryModule* lib = LoadedLibraries::find_for_text_address(addr); |
aoqi@0 | 1340 | if (lib) { |
aoqi@0 | 1341 | if (strcmp(lib->get_shortname(), "libjvm.so") == 0) { |
aoqi@0 | 1342 | return true; |
aoqi@0 | 1343 | } else { |
aoqi@0 | 1344 | return false; |
aoqi@0 | 1345 | } |
aoqi@0 | 1346 | } else { |
aoqi@0 | 1347 | lib = LoadedLibraries::find_for_data_address(addr); |
aoqi@0 | 1348 | if (lib) { |
aoqi@0 | 1349 | if (strcmp(lib->get_shortname(), "libjvm.so") == 0) { |
aoqi@0 | 1350 | return true; |
aoqi@0 | 1351 | } else { |
aoqi@0 | 1352 | return false; |
aoqi@0 | 1353 | } |
aoqi@0 | 1354 | } else { |
aoqi@0 | 1355 | return false; |
aoqi@0 | 1356 | } |
aoqi@0 | 1357 | } |
aoqi@0 | 1358 | } |
aoqi@0 | 1359 | |
aoqi@0 | 1360 | // Resolve an AIX function descriptor literal to a code pointer. |
aoqi@0 | 1361 | // If the input is a valid code pointer to a text segment of a loaded module, |
aoqi@0 | 1362 | // it is returned unchanged. |
aoqi@0 | 1363 | // If the input is a valid AIX function descriptor, it is resolved to the |
aoqi@0 | 1364 | // code entry point. |
aoqi@0 | 1365 | // If the input is neither a valid function descriptor nor a valid code pointer, |
aoqi@0 | 1366 | // NULL is returned. |
aoqi@0 | 1367 | static address resolve_function_descriptor_to_code_pointer(address p) { |
aoqi@0 | 1368 | |
aoqi@0 | 1369 | const LoadedLibraryModule* lib = LoadedLibraries::find_for_text_address(p); |
aoqi@0 | 1370 | if (lib) { |
aoqi@0 | 1371 | // its a real code pointer |
aoqi@0 | 1372 | return p; |
aoqi@0 | 1373 | } else { |
aoqi@0 | 1374 | lib = LoadedLibraries::find_for_data_address(p); |
aoqi@0 | 1375 | if (lib) { |
aoqi@0 | 1376 | // pointer to data segment, potential function descriptor |
aoqi@0 | 1377 | address code_entry = (address)(((FunctionDescriptor*)p)->entry()); |
aoqi@0 | 1378 | if (LoadedLibraries::find_for_text_address(code_entry)) { |
aoqi@0 | 1379 | // Its a function descriptor |
aoqi@0 | 1380 | return code_entry; |
aoqi@0 | 1381 | } |
aoqi@0 | 1382 | } |
aoqi@0 | 1383 | } |
aoqi@0 | 1384 | return NULL; |
aoqi@0 | 1385 | } |
aoqi@0 | 1386 | |
aoqi@0 | 1387 | bool os::dll_address_to_function_name(address addr, char *buf, |
aoqi@0 | 1388 | int buflen, int *offset) { |
aoqi@0 | 1389 | if (offset) { |
aoqi@0 | 1390 | *offset = -1; |
aoqi@0 | 1391 | } |
goetz@7424 | 1392 | // Buf is not optional, but offset is optional. |
goetz@7424 | 1393 | assert(buf != NULL, "sanity check"); |
goetz@7424 | 1394 | buf[0] = '\0'; |
aoqi@0 | 1395 | |
aoqi@0 | 1396 | // Resolve function ptr literals first. |
aoqi@0 | 1397 | addr = resolve_function_descriptor_to_code_pointer(addr); |
aoqi@0 | 1398 | if (!addr) { |
aoqi@0 | 1399 | return false; |
aoqi@0 | 1400 | } |
aoqi@0 | 1401 | |
aoqi@0 | 1402 | // Go through Decoder::decode to call getFuncName which reads the name from the traceback table. |
aoqi@0 | 1403 | return Decoder::decode(addr, buf, buflen, offset); |
aoqi@0 | 1404 | } |
aoqi@0 | 1405 | |
aoqi@0 | 1406 | static int getModuleName(codeptr_t pc, // [in] program counter |
aoqi@0 | 1407 | char* p_name, size_t namelen, // [out] optional: function name |
aoqi@0 | 1408 | char* p_errmsg, size_t errmsglen // [out] optional: user provided buffer for error messages |
aoqi@0 | 1409 | ) { |
aoqi@0 | 1410 | |
aoqi@0 | 1411 | // initialize output parameters |
aoqi@0 | 1412 | if (p_name && namelen > 0) { |
aoqi@0 | 1413 | *p_name = '\0'; |
aoqi@0 | 1414 | } |
aoqi@0 | 1415 | if (p_errmsg && errmsglen > 0) { |
aoqi@0 | 1416 | *p_errmsg = '\0'; |
aoqi@0 | 1417 | } |
aoqi@0 | 1418 | |
aoqi@0 | 1419 | const LoadedLibraryModule* const lib = LoadedLibraries::find_for_text_address((address)pc); |
aoqi@0 | 1420 | if (lib) { |
aoqi@0 | 1421 | if (p_name && namelen > 0) { |
aoqi@0 | 1422 | sprintf(p_name, "%.*s", namelen, lib->get_shortname()); |
aoqi@0 | 1423 | } |
aoqi@0 | 1424 | return 0; |
aoqi@0 | 1425 | } |
aoqi@0 | 1426 | |
goetz@7424 | 1427 | trcVerbose("pc outside any module"); |
aoqi@0 | 1428 | |
aoqi@0 | 1429 | return -1; |
aoqi@0 | 1430 | } |
aoqi@0 | 1431 | |
aoqi@0 | 1432 | bool os::dll_address_to_library_name(address addr, char* buf, |
aoqi@0 | 1433 | int buflen, int* offset) { |
aoqi@0 | 1434 | if (offset) { |
aoqi@0 | 1435 | *offset = -1; |
aoqi@0 | 1436 | } |
goetz@7424 | 1437 | // Buf is not optional, but offset is optional. |
goetz@7424 | 1438 | assert(buf != NULL, "sanity check"); |
goetz@7424 | 1439 | buf[0] = '\0'; |
aoqi@0 | 1440 | |
aoqi@0 | 1441 | // Resolve function ptr literals first. |
aoqi@0 | 1442 | addr = resolve_function_descriptor_to_code_pointer(addr); |
aoqi@0 | 1443 | if (!addr) { |
aoqi@0 | 1444 | return false; |
aoqi@0 | 1445 | } |
aoqi@0 | 1446 | |
aoqi@0 | 1447 | if (::getModuleName((codeptr_t) addr, buf, buflen, 0, 0) == 0) { |
aoqi@0 | 1448 | return true; |
aoqi@0 | 1449 | } |
aoqi@0 | 1450 | return false; |
aoqi@0 | 1451 | } |
aoqi@0 | 1452 | |
aoqi@0 | 1453 | // Loads .dll/.so and in case of error it checks if .dll/.so was built |
goetz@7424 | 1454 | // for the same architecture as Hotspot is running on. |
aoqi@0 | 1455 | void *os::dll_load(const char *filename, char *ebuf, int ebuflen) { |
aoqi@0 | 1456 | |
aoqi@0 | 1457 | if (ebuf && ebuflen > 0) { |
aoqi@0 | 1458 | ebuf[0] = '\0'; |
aoqi@0 | 1459 | ebuf[ebuflen - 1] = '\0'; |
aoqi@0 | 1460 | } |
aoqi@0 | 1461 | |
aoqi@0 | 1462 | if (!filename || strlen(filename) == 0) { |
aoqi@0 | 1463 | ::strncpy(ebuf, "dll_load: empty filename specified", ebuflen - 1); |
aoqi@0 | 1464 | return NULL; |
aoqi@0 | 1465 | } |
aoqi@0 | 1466 | |
aoqi@0 | 1467 | // RTLD_LAZY is currently not implemented. The dl is loaded immediately with all its dependants. |
aoqi@0 | 1468 | void * result= ::dlopen(filename, RTLD_LAZY); |
aoqi@0 | 1469 | if (result != NULL) { |
aoqi@0 | 1470 | // Reload dll cache. Don't do this in signal handling. |
aoqi@0 | 1471 | LoadedLibraries::reload(); |
aoqi@0 | 1472 | return result; |
aoqi@0 | 1473 | } else { |
aoqi@0 | 1474 | // error analysis when dlopen fails |
aoqi@0 | 1475 | const char* const error_report = ::dlerror(); |
aoqi@0 | 1476 | if (error_report && ebuf && ebuflen > 0) { |
aoqi@0 | 1477 | snprintf(ebuf, ebuflen - 1, "%s, LIBPATH=%s, LD_LIBRARY_PATH=%s : %s", |
aoqi@0 | 1478 | filename, ::getenv("LIBPATH"), ::getenv("LD_LIBRARY_PATH"), error_report); |
aoqi@0 | 1479 | } |
aoqi@0 | 1480 | } |
aoqi@0 | 1481 | return NULL; |
aoqi@0 | 1482 | } |
aoqi@0 | 1483 | |
aoqi@0 | 1484 | // Glibc-2.0 libdl is not MT safe. If you are building with any glibc, |
aoqi@0 | 1485 | // chances are you might want to run the generated bits against glibc-2.0 |
aoqi@0 | 1486 | // libdl.so, so always use locking for any version of glibc. |
aoqi@0 | 1487 | void* os::dll_lookup(void* handle, const char* name) { |
aoqi@0 | 1488 | pthread_mutex_lock(&dl_mutex); |
aoqi@0 | 1489 | void* res = dlsym(handle, name); |
aoqi@0 | 1490 | pthread_mutex_unlock(&dl_mutex); |
aoqi@0 | 1491 | return res; |
aoqi@0 | 1492 | } |
aoqi@0 | 1493 | |
aoqi@0 | 1494 | void* os::get_default_process_handle() { |
aoqi@0 | 1495 | return (void*)::dlopen(NULL, RTLD_LAZY); |
aoqi@0 | 1496 | } |
aoqi@0 | 1497 | |
aoqi@0 | 1498 | void os::print_dll_info(outputStream *st) { |
aoqi@0 | 1499 | st->print_cr("Dynamic libraries:"); |
aoqi@0 | 1500 | LoadedLibraries::print(st); |
aoqi@0 | 1501 | } |
aoqi@0 | 1502 | |
aoqi@0 | 1503 | void os::print_os_info(outputStream* st) { |
aoqi@0 | 1504 | st->print("OS:"); |
aoqi@0 | 1505 | |
aoqi@0 | 1506 | st->print("uname:"); |
aoqi@0 | 1507 | struct utsname name; |
aoqi@0 | 1508 | uname(&name); |
aoqi@0 | 1509 | st->print(name.sysname); st->print(" "); |
aoqi@0 | 1510 | st->print(name.nodename); st->print(" "); |
aoqi@0 | 1511 | st->print(name.release); st->print(" "); |
aoqi@0 | 1512 | st->print(name.version); st->print(" "); |
aoqi@0 | 1513 | st->print(name.machine); |
aoqi@0 | 1514 | st->cr(); |
aoqi@0 | 1515 | |
aoqi@0 | 1516 | // rlimit |
aoqi@0 | 1517 | st->print("rlimit:"); |
aoqi@0 | 1518 | struct rlimit rlim; |
aoqi@0 | 1519 | |
aoqi@0 | 1520 | st->print(" STACK "); |
aoqi@0 | 1521 | getrlimit(RLIMIT_STACK, &rlim); |
aoqi@0 | 1522 | if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); |
aoqi@0 | 1523 | else st->print("%uk", rlim.rlim_cur >> 10); |
aoqi@0 | 1524 | |
aoqi@0 | 1525 | st->print(", CORE "); |
aoqi@0 | 1526 | getrlimit(RLIMIT_CORE, &rlim); |
aoqi@0 | 1527 | if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); |
aoqi@0 | 1528 | else st->print("%uk", rlim.rlim_cur >> 10); |
aoqi@0 | 1529 | |
aoqi@0 | 1530 | st->print(", NPROC "); |
aoqi@0 | 1531 | st->print("%d", sysconf(_SC_CHILD_MAX)); |
aoqi@0 | 1532 | |
aoqi@0 | 1533 | st->print(", NOFILE "); |
aoqi@0 | 1534 | getrlimit(RLIMIT_NOFILE, &rlim); |
aoqi@0 | 1535 | if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); |
aoqi@0 | 1536 | else st->print("%d", rlim.rlim_cur); |
aoqi@0 | 1537 | |
aoqi@0 | 1538 | st->print(", AS "); |
aoqi@0 | 1539 | getrlimit(RLIMIT_AS, &rlim); |
aoqi@0 | 1540 | if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); |
aoqi@0 | 1541 | else st->print("%uk", rlim.rlim_cur >> 10); |
aoqi@0 | 1542 | |
aoqi@0 | 1543 | // Print limits on DATA, because it limits the C-heap. |
aoqi@0 | 1544 | st->print(", DATA "); |
aoqi@0 | 1545 | getrlimit(RLIMIT_DATA, &rlim); |
aoqi@0 | 1546 | if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); |
aoqi@0 | 1547 | else st->print("%uk", rlim.rlim_cur >> 10); |
aoqi@0 | 1548 | st->cr(); |
aoqi@0 | 1549 | |
aoqi@0 | 1550 | // load average |
aoqi@0 | 1551 | st->print("load average:"); |
aoqi@0 | 1552 | double loadavg[3] = {-1.L, -1.L, -1.L}; |
aoqi@0 | 1553 | os::loadavg(loadavg, 3); |
aoqi@0 | 1554 | st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]); |
aoqi@0 | 1555 | st->cr(); |
aoqi@0 | 1556 | } |
aoqi@0 | 1557 | |
aoqi@0 | 1558 | void os::print_memory_info(outputStream* st) { |
aoqi@0 | 1559 | |
aoqi@0 | 1560 | st->print_cr("Memory:"); |
aoqi@0 | 1561 | |
aoqi@0 | 1562 | st->print_cr(" default page size: %s", describe_pagesize(os::vm_page_size())); |
aoqi@0 | 1563 | st->print_cr(" default stack page size: %s", describe_pagesize(os::vm_page_size())); |
aoqi@0 | 1564 | st->print_cr(" default shm page size: %s", describe_pagesize(os::Aix::shm_default_page_size())); |
aoqi@0 | 1565 | st->print_cr(" can use 64K pages dynamically: %s", (os::Aix::can_use_64K_pages() ? "yes" :"no")); |
aoqi@0 | 1566 | st->print_cr(" can use 16M pages dynamically: %s", (os::Aix::can_use_16M_pages() ? "yes" :"no")); |
aoqi@0 | 1567 | if (g_multipage_error != 0) { |
aoqi@0 | 1568 | st->print_cr(" multipage error: %d", g_multipage_error); |
aoqi@0 | 1569 | } |
aoqi@0 | 1570 | |
aoqi@0 | 1571 | // print out LDR_CNTRL because it affects the default page sizes |
aoqi@0 | 1572 | const char* const ldr_cntrl = ::getenv("LDR_CNTRL"); |
aoqi@0 | 1573 | st->print_cr(" LDR_CNTRL=%s.", ldr_cntrl ? ldr_cntrl : "<unset>"); |
aoqi@0 | 1574 | |
aoqi@0 | 1575 | const char* const extshm = ::getenv("EXTSHM"); |
aoqi@0 | 1576 | st->print_cr(" EXTSHM=%s.", extshm ? extshm : "<unset>"); |
aoqi@0 | 1577 | |
aoqi@0 | 1578 | // Call os::Aix::get_meminfo() to retrieve memory statistics. |
aoqi@0 | 1579 | os::Aix::meminfo_t mi; |
aoqi@0 | 1580 | if (os::Aix::get_meminfo(&mi)) { |
aoqi@0 | 1581 | char buffer[256]; |
aoqi@0 | 1582 | if (os::Aix::on_aix()) { |
aoqi@0 | 1583 | jio_snprintf(buffer, sizeof(buffer), |
aoqi@0 | 1584 | " physical total : %llu\n" |
aoqi@0 | 1585 | " physical free : %llu\n" |
aoqi@0 | 1586 | " swap total : %llu\n" |
aoqi@0 | 1587 | " swap free : %llu\n", |
aoqi@0 | 1588 | mi.real_total, |
aoqi@0 | 1589 | mi.real_free, |
aoqi@0 | 1590 | mi.pgsp_total, |
aoqi@0 | 1591 | mi.pgsp_free); |
aoqi@0 | 1592 | } else { |
aoqi@0 | 1593 | Unimplemented(); |
aoqi@0 | 1594 | } |
aoqi@0 | 1595 | st->print_raw(buffer); |
aoqi@0 | 1596 | } else { |
aoqi@0 | 1597 | st->print_cr(" (no more information available)"); |
aoqi@0 | 1598 | } |
aoqi@0 | 1599 | } |
aoqi@0 | 1600 | |
aoqi@0 | 1601 | void os::pd_print_cpu_info(outputStream* st) { |
aoqi@0 | 1602 | // cpu |
aoqi@0 | 1603 | st->print("CPU:"); |
aoqi@0 | 1604 | st->print("total %d", os::processor_count()); |
aoqi@0 | 1605 | // It's not safe to query number of active processors after crash |
aoqi@0 | 1606 | // st->print("(active %d)", os::active_processor_count()); |
aoqi@0 | 1607 | st->print(" %s", VM_Version::cpu_features()); |
aoqi@0 | 1608 | st->cr(); |
aoqi@0 | 1609 | } |
aoqi@0 | 1610 | |
aoqi@0 | 1611 | void os::print_siginfo(outputStream* st, void* siginfo) { |
aoqi@0 | 1612 | // Use common posix version. |
aoqi@0 | 1613 | os::Posix::print_siginfo_brief(st, (const siginfo_t*) siginfo); |
aoqi@0 | 1614 | st->cr(); |
aoqi@0 | 1615 | } |
aoqi@0 | 1616 | |
aoqi@0 | 1617 | static void print_signal_handler(outputStream* st, int sig, |
aoqi@0 | 1618 | char* buf, size_t buflen); |
aoqi@0 | 1619 | |
aoqi@0 | 1620 | void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { |
aoqi@0 | 1621 | st->print_cr("Signal Handlers:"); |
aoqi@0 | 1622 | print_signal_handler(st, SIGSEGV, buf, buflen); |
aoqi@0 | 1623 | print_signal_handler(st, SIGBUS , buf, buflen); |
aoqi@0 | 1624 | print_signal_handler(st, SIGFPE , buf, buflen); |
aoqi@0 | 1625 | print_signal_handler(st, SIGPIPE, buf, buflen); |
aoqi@0 | 1626 | print_signal_handler(st, SIGXFSZ, buf, buflen); |
aoqi@0 | 1627 | print_signal_handler(st, SIGILL , buf, buflen); |
aoqi@0 | 1628 | print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); |
aoqi@0 | 1629 | print_signal_handler(st, SR_signum, buf, buflen); |
aoqi@0 | 1630 | print_signal_handler(st, SHUTDOWN1_SIGNAL, buf, buflen); |
aoqi@0 | 1631 | print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); |
aoqi@0 | 1632 | print_signal_handler(st, SHUTDOWN3_SIGNAL , buf, buflen); |
aoqi@0 | 1633 | print_signal_handler(st, BREAK_SIGNAL, buf, buflen); |
aoqi@0 | 1634 | print_signal_handler(st, SIGTRAP, buf, buflen); |
aoqi@0 | 1635 | print_signal_handler(st, SIGDANGER, buf, buflen); |
aoqi@0 | 1636 | } |
aoqi@0 | 1637 | |
aoqi@0 | 1638 | static char saved_jvm_path[MAXPATHLEN] = {0}; |
aoqi@0 | 1639 | |
goetz@7424 | 1640 | // Find the full path to the current module, libjvm.so. |
aoqi@0 | 1641 | void os::jvm_path(char *buf, jint buflen) { |
aoqi@0 | 1642 | // Error checking. |
aoqi@0 | 1643 | if (buflen < MAXPATHLEN) { |
aoqi@0 | 1644 | assert(false, "must use a large-enough buffer"); |
aoqi@0 | 1645 | buf[0] = '\0'; |
aoqi@0 | 1646 | return; |
aoqi@0 | 1647 | } |
aoqi@0 | 1648 | // Lazy resolve the path to current module. |
aoqi@0 | 1649 | if (saved_jvm_path[0] != 0) { |
aoqi@0 | 1650 | strcpy(buf, saved_jvm_path); |
aoqi@0 | 1651 | return; |
aoqi@0 | 1652 | } |
aoqi@0 | 1653 | |
aoqi@0 | 1654 | Dl_info dlinfo; |
aoqi@0 | 1655 | int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); |
aoqi@0 | 1656 | assert(ret != 0, "cannot locate libjvm"); |
aoqi@0 | 1657 | char* rp = realpath((char *)dlinfo.dli_fname, buf); |
aoqi@0 | 1658 | assert(rp != NULL, "error in realpath(): maybe the 'path' argument is too long?"); |
aoqi@0 | 1659 | |
aoqi@0 | 1660 | strcpy(saved_jvm_path, buf); |
aoqi@0 | 1661 | } |
aoqi@0 | 1662 | |
aoqi@0 | 1663 | void os::print_jni_name_prefix_on(outputStream* st, int args_size) { |
aoqi@0 | 1664 | // no prefix required, not even "_" |
aoqi@0 | 1665 | } |
aoqi@0 | 1666 | |
aoqi@0 | 1667 | void os::print_jni_name_suffix_on(outputStream* st, int args_size) { |
aoqi@0 | 1668 | // no suffix required |
aoqi@0 | 1669 | } |
aoqi@0 | 1670 | |
aoqi@0 | 1671 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 1672 | // sun.misc.Signal support |
aoqi@0 | 1673 | |
aoqi@0 | 1674 | static volatile jint sigint_count = 0; |
aoqi@0 | 1675 | |
aoqi@0 | 1676 | static void |
aoqi@0 | 1677 | UserHandler(int sig, void *siginfo, void *context) { |
aoqi@0 | 1678 | // 4511530 - sem_post is serialized and handled by the manager thread. When |
aoqi@0 | 1679 | // the program is interrupted by Ctrl-C, SIGINT is sent to every thread. We |
aoqi@0 | 1680 | // don't want to flood the manager thread with sem_post requests. |
aoqi@0 | 1681 | if (sig == SIGINT && Atomic::add(1, &sigint_count) > 1) |
aoqi@0 | 1682 | return; |
aoqi@0 | 1683 | |
aoqi@0 | 1684 | // Ctrl-C is pressed during error reporting, likely because the error |
aoqi@0 | 1685 | // handler fails to abort. Let VM die immediately. |
aoqi@0 | 1686 | if (sig == SIGINT && is_error_reported()) { |
aoqi@0 | 1687 | os::die(); |
aoqi@0 | 1688 | } |
aoqi@0 | 1689 | |
aoqi@0 | 1690 | os::signal_notify(sig); |
aoqi@0 | 1691 | } |
aoqi@0 | 1692 | |
aoqi@0 | 1693 | void* os::user_handler() { |
aoqi@0 | 1694 | return CAST_FROM_FN_PTR(void*, UserHandler); |
aoqi@0 | 1695 | } |
aoqi@0 | 1696 | |
aoqi@0 | 1697 | extern "C" { |
aoqi@0 | 1698 | typedef void (*sa_handler_t)(int); |
aoqi@0 | 1699 | typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); |
aoqi@0 | 1700 | } |
aoqi@0 | 1701 | |
aoqi@0 | 1702 | void* os::signal(int signal_number, void* handler) { |
aoqi@0 | 1703 | struct sigaction sigAct, oldSigAct; |
aoqi@0 | 1704 | |
aoqi@0 | 1705 | sigfillset(&(sigAct.sa_mask)); |
aoqi@0 | 1706 | |
aoqi@0 | 1707 | // Do not block out synchronous signals in the signal handler. |
aoqi@0 | 1708 | // Blocking synchronous signals only makes sense if you can really |
aoqi@0 | 1709 | // be sure that those signals won't happen during signal handling, |
goetz@7424 | 1710 | // when the blocking applies. Normal signal handlers are lean and |
aoqi@0 | 1711 | // do not cause signals. But our signal handlers tend to be "risky" |
aoqi@0 | 1712 | // - secondary SIGSEGV, SIGILL, SIGBUS' may and do happen. |
aoqi@0 | 1713 | // On AIX, PASE there was a case where a SIGSEGV happened, followed |
aoqi@0 | 1714 | // by a SIGILL, which was blocked due to the signal mask. The process |
aoqi@0 | 1715 | // just hung forever. Better to crash from a secondary signal than to hang. |
aoqi@0 | 1716 | sigdelset(&(sigAct.sa_mask), SIGSEGV); |
aoqi@0 | 1717 | sigdelset(&(sigAct.sa_mask), SIGBUS); |
aoqi@0 | 1718 | sigdelset(&(sigAct.sa_mask), SIGILL); |
aoqi@0 | 1719 | sigdelset(&(sigAct.sa_mask), SIGFPE); |
aoqi@0 | 1720 | sigdelset(&(sigAct.sa_mask), SIGTRAP); |
aoqi@0 | 1721 | |
aoqi@0 | 1722 | sigAct.sa_flags = SA_RESTART|SA_SIGINFO; |
aoqi@0 | 1723 | |
aoqi@0 | 1724 | sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); |
aoqi@0 | 1725 | |
aoqi@0 | 1726 | if (sigaction(signal_number, &sigAct, &oldSigAct)) { |
aoqi@0 | 1727 | // -1 means registration failed |
aoqi@0 | 1728 | return (void *)-1; |
aoqi@0 | 1729 | } |
aoqi@0 | 1730 | |
aoqi@0 | 1731 | return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); |
aoqi@0 | 1732 | } |
aoqi@0 | 1733 | |
aoqi@0 | 1734 | void os::signal_raise(int signal_number) { |
aoqi@0 | 1735 | ::raise(signal_number); |
aoqi@0 | 1736 | } |
aoqi@0 | 1737 | |
aoqi@0 | 1738 | // |
aoqi@0 | 1739 | // The following code is moved from os.cpp for making this |
aoqi@0 | 1740 | // code platform specific, which it is by its very nature. |
aoqi@0 | 1741 | // |
aoqi@0 | 1742 | |
aoqi@0 | 1743 | // Will be modified when max signal is changed to be dynamic |
aoqi@0 | 1744 | int os::sigexitnum_pd() { |
aoqi@0 | 1745 | return NSIG; |
aoqi@0 | 1746 | } |
aoqi@0 | 1747 | |
aoqi@0 | 1748 | // a counter for each possible signal value |
aoqi@0 | 1749 | static volatile jint pending_signals[NSIG+1] = { 0 }; |
aoqi@0 | 1750 | |
aoqi@0 | 1751 | // Linux(POSIX) specific hand shaking semaphore. |
aoqi@0 | 1752 | static sem_t sig_sem; |
aoqi@0 | 1753 | |
aoqi@0 | 1754 | void os::signal_init_pd() { |
aoqi@0 | 1755 | // Initialize signal structures |
aoqi@0 | 1756 | ::memset((void*)pending_signals, 0, sizeof(pending_signals)); |
aoqi@0 | 1757 | |
aoqi@0 | 1758 | // Initialize signal semaphore |
aoqi@0 | 1759 | int rc = ::sem_init(&sig_sem, 0, 0); |
aoqi@0 | 1760 | guarantee(rc != -1, "sem_init failed"); |
aoqi@0 | 1761 | } |
aoqi@0 | 1762 | |
aoqi@0 | 1763 | void os::signal_notify(int sig) { |
aoqi@0 | 1764 | Atomic::inc(&pending_signals[sig]); |
aoqi@0 | 1765 | ::sem_post(&sig_sem); |
aoqi@0 | 1766 | } |
aoqi@0 | 1767 | |
aoqi@0 | 1768 | static int check_pending_signals(bool wait) { |
aoqi@0 | 1769 | Atomic::store(0, &sigint_count); |
aoqi@0 | 1770 | for (;;) { |
aoqi@0 | 1771 | for (int i = 0; i < NSIG + 1; i++) { |
aoqi@0 | 1772 | jint n = pending_signals[i]; |
aoqi@0 | 1773 | if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { |
aoqi@0 | 1774 | return i; |
aoqi@0 | 1775 | } |
aoqi@0 | 1776 | } |
aoqi@0 | 1777 | if (!wait) { |
aoqi@0 | 1778 | return -1; |
aoqi@0 | 1779 | } |
aoqi@0 | 1780 | JavaThread *thread = JavaThread::current(); |
aoqi@0 | 1781 | ThreadBlockInVM tbivm(thread); |
aoqi@0 | 1782 | |
aoqi@0 | 1783 | bool threadIsSuspended; |
aoqi@0 | 1784 | do { |
aoqi@0 | 1785 | thread->set_suspend_equivalent(); |
aoqi@0 | 1786 | // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() |
aoqi@0 | 1787 | |
aoqi@0 | 1788 | ::sem_wait(&sig_sem); |
aoqi@0 | 1789 | |
aoqi@0 | 1790 | // were we externally suspended while we were waiting? |
aoqi@0 | 1791 | threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); |
aoqi@0 | 1792 | if (threadIsSuspended) { |
aoqi@0 | 1793 | // |
aoqi@0 | 1794 | // The semaphore has been incremented, but while we were waiting |
aoqi@0 | 1795 | // another thread suspended us. We don't want to continue running |
aoqi@0 | 1796 | // while suspended because that would surprise the thread that |
aoqi@0 | 1797 | // suspended us. |
aoqi@0 | 1798 | // |
aoqi@0 | 1799 | ::sem_post(&sig_sem); |
aoqi@0 | 1800 | |
aoqi@0 | 1801 | thread->java_suspend_self(); |
aoqi@0 | 1802 | } |
aoqi@0 | 1803 | } while (threadIsSuspended); |
aoqi@0 | 1804 | } |
aoqi@0 | 1805 | } |
aoqi@0 | 1806 | |
aoqi@0 | 1807 | int os::signal_lookup() { |
aoqi@0 | 1808 | return check_pending_signals(false); |
aoqi@0 | 1809 | } |
aoqi@0 | 1810 | |
aoqi@0 | 1811 | int os::signal_wait() { |
aoqi@0 | 1812 | return check_pending_signals(true); |
aoqi@0 | 1813 | } |
aoqi@0 | 1814 | |
aoqi@0 | 1815 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 1816 | // Virtual Memory |
aoqi@0 | 1817 | |
aoqi@0 | 1818 | // AddrRange describes an immutable address range |
aoqi@0 | 1819 | // |
aoqi@0 | 1820 | // This is a helper class for the 'shared memory bookkeeping' below. |
aoqi@0 | 1821 | class AddrRange { |
aoqi@0 | 1822 | friend class ShmBkBlock; |
aoqi@0 | 1823 | |
aoqi@0 | 1824 | char* _start; |
aoqi@0 | 1825 | size_t _size; |
aoqi@0 | 1826 | |
aoqi@0 | 1827 | public: |
aoqi@0 | 1828 | |
aoqi@0 | 1829 | AddrRange(char* start, size_t size) |
aoqi@0 | 1830 | : _start(start), _size(size) |
aoqi@0 | 1831 | {} |
aoqi@0 | 1832 | |
aoqi@0 | 1833 | AddrRange(const AddrRange& r) |
aoqi@0 | 1834 | : _start(r.start()), _size(r.size()) |
aoqi@0 | 1835 | {} |
aoqi@0 | 1836 | |
aoqi@0 | 1837 | char* start() const { return _start; } |
aoqi@0 | 1838 | size_t size() const { return _size; } |
aoqi@0 | 1839 | char* end() const { return _start + _size; } |
aoqi@0 | 1840 | bool is_empty() const { return _size == 0 ? true : false; } |
aoqi@0 | 1841 | |
aoqi@0 | 1842 | static AddrRange empty_range() { return AddrRange(NULL, 0); } |
aoqi@0 | 1843 | |
aoqi@0 | 1844 | bool contains(const char* p) const { |
aoqi@0 | 1845 | return start() <= p && end() > p; |
aoqi@0 | 1846 | } |
aoqi@0 | 1847 | |
aoqi@0 | 1848 | bool contains(const AddrRange& range) const { |
aoqi@0 | 1849 | return start() <= range.start() && end() >= range.end(); |
aoqi@0 | 1850 | } |
aoqi@0 | 1851 | |
aoqi@0 | 1852 | bool intersects(const AddrRange& range) const { |
aoqi@0 | 1853 | return (range.start() <= start() && range.end() > start()) || |
aoqi@0 | 1854 | (range.start() < end() && range.end() >= end()) || |
aoqi@0 | 1855 | contains(range); |
aoqi@0 | 1856 | } |
aoqi@0 | 1857 | |
aoqi@0 | 1858 | bool is_same_range(const AddrRange& range) const { |
aoqi@0 | 1859 | return start() == range.start() && size() == range.size(); |
aoqi@0 | 1860 | } |
aoqi@0 | 1861 | |
aoqi@0 | 1862 | // return the closest inside range consisting of whole pages |
aoqi@0 | 1863 | AddrRange find_closest_aligned_range(size_t pagesize) const { |
aoqi@0 | 1864 | if (pagesize == 0 || is_empty()) { |
aoqi@0 | 1865 | return empty_range(); |
aoqi@0 | 1866 | } |
aoqi@0 | 1867 | char* const from = (char*)align_size_up((intptr_t)_start, pagesize); |
aoqi@0 | 1868 | char* const to = (char*)align_size_down((intptr_t)end(), pagesize); |
aoqi@0 | 1869 | if (from > to) { |
aoqi@0 | 1870 | return empty_range(); |
aoqi@0 | 1871 | } |
aoqi@0 | 1872 | return AddrRange(from, to - from); |
aoqi@0 | 1873 | } |
aoqi@0 | 1874 | }; |
aoqi@0 | 1875 | |
aoqi@0 | 1876 | //////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 1877 | // shared memory bookkeeping |
aoqi@0 | 1878 | // |
aoqi@0 | 1879 | // the os::reserve_memory() API and friends hand out different kind of memory, depending |
aoqi@0 | 1880 | // on need and circumstances. Memory may be allocated with mmap() or with shmget/shmat. |
aoqi@0 | 1881 | // |
aoqi@0 | 1882 | // But these memory types have to be treated differently. For example, to uncommit |
aoqi@0 | 1883 | // mmap-based memory, msync(MS_INVALIDATE) is needed, to uncommit shmat-based memory, |
aoqi@0 | 1884 | // disclaim64() is needed. |
aoqi@0 | 1885 | // |
aoqi@0 | 1886 | // Therefore we need to keep track of the allocated memory segments and their |
aoqi@0 | 1887 | // properties. |
aoqi@0 | 1888 | |
aoqi@0 | 1889 | // ShmBkBlock: base class for all blocks in the shared memory bookkeeping |
aoqi@0 | 1890 | class ShmBkBlock { |
aoqi@0 | 1891 | |
aoqi@0 | 1892 | ShmBkBlock* _next; |
aoqi@0 | 1893 | |
aoqi@0 | 1894 | protected: |
aoqi@0 | 1895 | |
aoqi@0 | 1896 | AddrRange _range; |
aoqi@0 | 1897 | const size_t _pagesize; |
aoqi@0 | 1898 | const bool _pinned; |
aoqi@0 | 1899 | |
aoqi@0 | 1900 | public: |
aoqi@0 | 1901 | |
aoqi@0 | 1902 | ShmBkBlock(AddrRange range, size_t pagesize, bool pinned) |
aoqi@0 | 1903 | : _range(range), _pagesize(pagesize), _pinned(pinned) , _next(NULL) { |
aoqi@0 | 1904 | |
aoqi@0 | 1905 | assert(_pagesize == SIZE_4K || _pagesize == SIZE_64K || _pagesize == SIZE_16M, "invalid page size"); |
aoqi@0 | 1906 | assert(!_range.is_empty(), "invalid range"); |
aoqi@0 | 1907 | } |
aoqi@0 | 1908 | |
aoqi@0 | 1909 | virtual void print(outputStream* st) const { |
aoqi@0 | 1910 | st->print("0x%p ... 0x%p (%llu) - %d %s pages - %s", |
aoqi@0 | 1911 | _range.start(), _range.end(), _range.size(), |
aoqi@0 | 1912 | _range.size() / _pagesize, describe_pagesize(_pagesize), |
aoqi@0 | 1913 | _pinned ? "pinned" : ""); |
aoqi@0 | 1914 | } |
aoqi@0 | 1915 | |
aoqi@0 | 1916 | enum Type { MMAP, SHMAT }; |
aoqi@0 | 1917 | virtual Type getType() = 0; |
aoqi@0 | 1918 | |
aoqi@0 | 1919 | char* base() const { return _range.start(); } |
aoqi@0 | 1920 | size_t size() const { return _range.size(); } |
aoqi@0 | 1921 | |
aoqi@0 | 1922 | void setAddrRange(AddrRange range) { |
aoqi@0 | 1923 | _range = range; |
aoqi@0 | 1924 | } |
aoqi@0 | 1925 | |
aoqi@0 | 1926 | bool containsAddress(const char* p) const { |
aoqi@0 | 1927 | return _range.contains(p); |
aoqi@0 | 1928 | } |
aoqi@0 | 1929 | |
aoqi@0 | 1930 | bool containsRange(const char* p, size_t size) const { |
aoqi@0 | 1931 | return _range.contains(AddrRange((char*)p, size)); |
aoqi@0 | 1932 | } |
aoqi@0 | 1933 | |
aoqi@0 | 1934 | bool isSameRange(const char* p, size_t size) const { |
aoqi@0 | 1935 | return _range.is_same_range(AddrRange((char*)p, size)); |
aoqi@0 | 1936 | } |
aoqi@0 | 1937 | |
aoqi@0 | 1938 | virtual bool disclaim(char* p, size_t size) = 0; |
aoqi@0 | 1939 | virtual bool release() = 0; |
aoqi@0 | 1940 | |
aoqi@0 | 1941 | // blocks live in a list. |
aoqi@0 | 1942 | ShmBkBlock* next() const { return _next; } |
aoqi@0 | 1943 | void set_next(ShmBkBlock* blk) { _next = blk; } |
aoqi@0 | 1944 | |
aoqi@0 | 1945 | }; // end: ShmBkBlock |
aoqi@0 | 1946 | |
aoqi@0 | 1947 | |
aoqi@0 | 1948 | // ShmBkMappedBlock: describes an block allocated with mmap() |
aoqi@0 | 1949 | class ShmBkMappedBlock : public ShmBkBlock { |
aoqi@0 | 1950 | public: |
aoqi@0 | 1951 | |
aoqi@0 | 1952 | ShmBkMappedBlock(AddrRange range) |
aoqi@0 | 1953 | : ShmBkBlock(range, SIZE_4K, false) {} // mmap: always 4K, never pinned |
aoqi@0 | 1954 | |
aoqi@0 | 1955 | void print(outputStream* st) const { |
aoqi@0 | 1956 | ShmBkBlock::print(st); |
aoqi@0 | 1957 | st->print_cr(" - mmap'ed"); |
aoqi@0 | 1958 | } |
aoqi@0 | 1959 | |
aoqi@0 | 1960 | Type getType() { |
aoqi@0 | 1961 | return MMAP; |
aoqi@0 | 1962 | } |
aoqi@0 | 1963 | |
aoqi@0 | 1964 | bool disclaim(char* p, size_t size) { |
aoqi@0 | 1965 | |
aoqi@0 | 1966 | AddrRange r(p, size); |
aoqi@0 | 1967 | |
aoqi@0 | 1968 | guarantee(_range.contains(r), "invalid disclaim"); |
aoqi@0 | 1969 | |
aoqi@0 | 1970 | // only disclaim whole ranges. |
aoqi@0 | 1971 | const AddrRange r2 = r.find_closest_aligned_range(_pagesize); |
aoqi@0 | 1972 | if (r2.is_empty()) { |
aoqi@0 | 1973 | return true; |
aoqi@0 | 1974 | } |
aoqi@0 | 1975 | |
aoqi@0 | 1976 | const int rc = ::msync(r2.start(), r2.size(), MS_INVALIDATE); |
aoqi@0 | 1977 | |
aoqi@0 | 1978 | if (rc != 0) { |
aoqi@0 | 1979 | warning("msync(0x%p, %llu, MS_INVALIDATE) failed (%d)\n", r2.start(), r2.size(), errno); |
aoqi@0 | 1980 | } |
aoqi@0 | 1981 | |
aoqi@0 | 1982 | return rc == 0 ? true : false; |
aoqi@0 | 1983 | } |
aoqi@0 | 1984 | |
aoqi@0 | 1985 | bool release() { |
aoqi@0 | 1986 | // mmap'ed blocks are released using munmap |
aoqi@0 | 1987 | if (::munmap(_range.start(), _range.size()) != 0) { |
aoqi@0 | 1988 | warning("munmap(0x%p, %llu) failed (%d)\n", _range.start(), _range.size(), errno); |
aoqi@0 | 1989 | return false; |
aoqi@0 | 1990 | } |
aoqi@0 | 1991 | return true; |
aoqi@0 | 1992 | } |
aoqi@0 | 1993 | }; // end: ShmBkMappedBlock |
aoqi@0 | 1994 | |
aoqi@0 | 1995 | // ShmBkShmatedBlock: describes an block allocated with shmget/shmat() |
aoqi@0 | 1996 | class ShmBkShmatedBlock : public ShmBkBlock { |
aoqi@0 | 1997 | public: |
aoqi@0 | 1998 | |
aoqi@0 | 1999 | ShmBkShmatedBlock(AddrRange range, size_t pagesize, bool pinned) |
aoqi@0 | 2000 | : ShmBkBlock(range, pagesize, pinned) {} |
aoqi@0 | 2001 | |
aoqi@0 | 2002 | void print(outputStream* st) const { |
aoqi@0 | 2003 | ShmBkBlock::print(st); |
aoqi@0 | 2004 | st->print_cr(" - shmat'ed"); |
aoqi@0 | 2005 | } |
aoqi@0 | 2006 | |
aoqi@0 | 2007 | Type getType() { |
aoqi@0 | 2008 | return SHMAT; |
aoqi@0 | 2009 | } |
aoqi@0 | 2010 | |
aoqi@0 | 2011 | bool disclaim(char* p, size_t size) { |
aoqi@0 | 2012 | |
aoqi@0 | 2013 | AddrRange r(p, size); |
aoqi@0 | 2014 | |
aoqi@0 | 2015 | if (_pinned) { |
aoqi@0 | 2016 | return true; |
aoqi@0 | 2017 | } |
aoqi@0 | 2018 | |
aoqi@0 | 2019 | // shmat'ed blocks are disclaimed using disclaim64 |
aoqi@0 | 2020 | guarantee(_range.contains(r), "invalid disclaim"); |
aoqi@0 | 2021 | |
aoqi@0 | 2022 | // only disclaim whole ranges. |
aoqi@0 | 2023 | const AddrRange r2 = r.find_closest_aligned_range(_pagesize); |
aoqi@0 | 2024 | if (r2.is_empty()) { |
aoqi@0 | 2025 | return true; |
aoqi@0 | 2026 | } |
aoqi@0 | 2027 | |
aoqi@0 | 2028 | const bool rc = my_disclaim64(r2.start(), r2.size()); |
aoqi@0 | 2029 | |
aoqi@0 | 2030 | if (Verbose && !rc) { |
aoqi@0 | 2031 | warning("failed to disclaim shm %p-%p\n", r2.start(), r2.end()); |
aoqi@0 | 2032 | } |
aoqi@0 | 2033 | |
aoqi@0 | 2034 | return rc; |
aoqi@0 | 2035 | } |
aoqi@0 | 2036 | |
aoqi@0 | 2037 | bool release() { |
aoqi@0 | 2038 | bool rc = false; |
aoqi@0 | 2039 | if (::shmdt(_range.start()) != 0) { |
aoqi@0 | 2040 | warning("shmdt(0x%p) failed (%d)\n", _range.start(), errno); |
aoqi@0 | 2041 | } else { |
aoqi@0 | 2042 | rc = true; |
aoqi@0 | 2043 | } |
aoqi@0 | 2044 | return rc; |
aoqi@0 | 2045 | } |
aoqi@0 | 2046 | |
aoqi@0 | 2047 | }; // end: ShmBkShmatedBlock |
aoqi@0 | 2048 | |
aoqi@0 | 2049 | static ShmBkBlock* g_shmbk_list = NULL; |
aoqi@0 | 2050 | static volatile jint g_shmbk_table_lock = 0; |
aoqi@0 | 2051 | |
aoqi@0 | 2052 | // keep some usage statistics |
aoqi@0 | 2053 | static struct { |
aoqi@0 | 2054 | int nodes; // number of nodes in list |
aoqi@0 | 2055 | size_t bytes; // reserved - not committed - bytes. |
aoqi@0 | 2056 | int reserves; // how often reserve was called |
aoqi@0 | 2057 | int lookups; // how often a lookup was made |
aoqi@0 | 2058 | } g_shmbk_stats = { 0, 0, 0, 0 }; |
aoqi@0 | 2059 | |
aoqi@0 | 2060 | // add information about a shared memory segment to the bookkeeping |
aoqi@0 | 2061 | static void shmbk_register(ShmBkBlock* p_block) { |
aoqi@0 | 2062 | guarantee(p_block, "logic error"); |
aoqi@0 | 2063 | p_block->set_next(g_shmbk_list); |
aoqi@0 | 2064 | g_shmbk_list = p_block; |
aoqi@0 | 2065 | g_shmbk_stats.reserves ++; |
aoqi@0 | 2066 | g_shmbk_stats.bytes += p_block->size(); |
aoqi@0 | 2067 | g_shmbk_stats.nodes ++; |
aoqi@0 | 2068 | } |
aoqi@0 | 2069 | |
aoqi@0 | 2070 | // remove information about a shared memory segment by its starting address |
aoqi@0 | 2071 | static void shmbk_unregister(ShmBkBlock* p_block) { |
aoqi@0 | 2072 | ShmBkBlock* p = g_shmbk_list; |
aoqi@0 | 2073 | ShmBkBlock* prev = NULL; |
aoqi@0 | 2074 | while (p) { |
aoqi@0 | 2075 | if (p == p_block) { |
aoqi@0 | 2076 | if (prev) { |
aoqi@0 | 2077 | prev->set_next(p->next()); |
aoqi@0 | 2078 | } else { |
aoqi@0 | 2079 | g_shmbk_list = p->next(); |
aoqi@0 | 2080 | } |
aoqi@0 | 2081 | g_shmbk_stats.nodes --; |
aoqi@0 | 2082 | g_shmbk_stats.bytes -= p->size(); |
aoqi@0 | 2083 | return; |
aoqi@0 | 2084 | } |
aoqi@0 | 2085 | prev = p; |
aoqi@0 | 2086 | p = p->next(); |
aoqi@0 | 2087 | } |
aoqi@0 | 2088 | assert(false, "should not happen"); |
aoqi@0 | 2089 | } |
aoqi@0 | 2090 | |
aoqi@0 | 2091 | // given a pointer, return shared memory bookkeeping record for the segment it points into |
aoqi@0 | 2092 | // using the returned block info must happen under lock protection |
aoqi@0 | 2093 | static ShmBkBlock* shmbk_find_by_containing_address(const char* addr) { |
aoqi@0 | 2094 | g_shmbk_stats.lookups ++; |
aoqi@0 | 2095 | ShmBkBlock* p = g_shmbk_list; |
aoqi@0 | 2096 | while (p) { |
aoqi@0 | 2097 | if (p->containsAddress(addr)) { |
aoqi@0 | 2098 | return p; |
aoqi@0 | 2099 | } |
aoqi@0 | 2100 | p = p->next(); |
aoqi@0 | 2101 | } |
aoqi@0 | 2102 | return NULL; |
aoqi@0 | 2103 | } |
aoqi@0 | 2104 | |
aoqi@0 | 2105 | // dump all information about all memory segments allocated with os::reserve_memory() |
aoqi@0 | 2106 | void shmbk_dump_info() { |
aoqi@0 | 2107 | tty->print_cr("-- shared mem bookkeeping (alive: %d segments, %llu bytes, " |
aoqi@0 | 2108 | "total reserves: %d total lookups: %d)", |
aoqi@0 | 2109 | g_shmbk_stats.nodes, g_shmbk_stats.bytes, g_shmbk_stats.reserves, g_shmbk_stats.lookups); |
aoqi@0 | 2110 | const ShmBkBlock* p = g_shmbk_list; |
aoqi@0 | 2111 | int i = 0; |
aoqi@0 | 2112 | while (p) { |
aoqi@0 | 2113 | p->print(tty); |
aoqi@0 | 2114 | p = p->next(); |
aoqi@0 | 2115 | i ++; |
aoqi@0 | 2116 | } |
aoqi@0 | 2117 | } |
aoqi@0 | 2118 | |
aoqi@0 | 2119 | #define LOCK_SHMBK { ThreadCritical _LOCK_SHMBK; |
aoqi@0 | 2120 | #define UNLOCK_SHMBK } |
aoqi@0 | 2121 | |
aoqi@0 | 2122 | // End: shared memory bookkeeping |
aoqi@0 | 2123 | //////////////////////////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 2124 | |
aoqi@0 | 2125 | int os::vm_page_size() { |
aoqi@0 | 2126 | // Seems redundant as all get out |
aoqi@0 | 2127 | assert(os::Aix::page_size() != -1, "must call os::init"); |
aoqi@0 | 2128 | return os::Aix::page_size(); |
aoqi@0 | 2129 | } |
aoqi@0 | 2130 | |
aoqi@0 | 2131 | // Aix allocates memory by pages. |
aoqi@0 | 2132 | int os::vm_allocation_granularity() { |
aoqi@0 | 2133 | assert(os::Aix::page_size() != -1, "must call os::init"); |
aoqi@0 | 2134 | return os::Aix::page_size(); |
aoqi@0 | 2135 | } |
aoqi@0 | 2136 | |
aoqi@0 | 2137 | int os::Aix::commit_memory_impl(char* addr, size_t size, bool exec) { |
aoqi@0 | 2138 | |
aoqi@0 | 2139 | // Commit is a noop. There is no explicit commit |
aoqi@0 | 2140 | // needed on AIX. Memory is committed when touched. |
aoqi@0 | 2141 | // |
aoqi@0 | 2142 | // Debug : check address range for validity |
aoqi@0 | 2143 | #ifdef ASSERT |
aoqi@0 | 2144 | LOCK_SHMBK |
aoqi@0 | 2145 | ShmBkBlock* const block = shmbk_find_by_containing_address(addr); |
aoqi@0 | 2146 | if (!block) { |
aoqi@0 | 2147 | fprintf(stderr, "invalid pointer: " INTPTR_FORMAT "\n", addr); |
aoqi@0 | 2148 | shmbk_dump_info(); |
aoqi@0 | 2149 | assert(false, "invalid pointer"); |
aoqi@0 | 2150 | return false; |
aoqi@0 | 2151 | } else if (!block->containsRange(addr, size)) { |
aoqi@0 | 2152 | fprintf(stderr, "invalid range: " INTPTR_FORMAT " .. " INTPTR_FORMAT "\n", addr, addr + size); |
aoqi@0 | 2153 | shmbk_dump_info(); |
aoqi@0 | 2154 | assert(false, "invalid range"); |
aoqi@0 | 2155 | return false; |
aoqi@0 | 2156 | } |
aoqi@0 | 2157 | UNLOCK_SHMBK |
aoqi@0 | 2158 | #endif // ASSERT |
aoqi@0 | 2159 | |
aoqi@0 | 2160 | return 0; |
aoqi@0 | 2161 | } |
aoqi@0 | 2162 | |
aoqi@0 | 2163 | bool os::pd_commit_memory(char* addr, size_t size, bool exec) { |
aoqi@0 | 2164 | return os::Aix::commit_memory_impl(addr, size, exec) == 0; |
aoqi@0 | 2165 | } |
aoqi@0 | 2166 | |
aoqi@0 | 2167 | void os::pd_commit_memory_or_exit(char* addr, size_t size, bool exec, |
aoqi@0 | 2168 | const char* mesg) { |
aoqi@0 | 2169 | assert(mesg != NULL, "mesg must be specified"); |
aoqi@0 | 2170 | os::Aix::commit_memory_impl(addr, size, exec); |
aoqi@0 | 2171 | } |
aoqi@0 | 2172 | |
aoqi@0 | 2173 | int os::Aix::commit_memory_impl(char* addr, size_t size, |
aoqi@0 | 2174 | size_t alignment_hint, bool exec) { |
aoqi@0 | 2175 | return os::Aix::commit_memory_impl(addr, size, exec); |
aoqi@0 | 2176 | } |
aoqi@0 | 2177 | |
aoqi@0 | 2178 | bool os::pd_commit_memory(char* addr, size_t size, size_t alignment_hint, |
aoqi@0 | 2179 | bool exec) { |
aoqi@0 | 2180 | return os::Aix::commit_memory_impl(addr, size, alignment_hint, exec) == 0; |
aoqi@0 | 2181 | } |
aoqi@0 | 2182 | |
aoqi@0 | 2183 | void os::pd_commit_memory_or_exit(char* addr, size_t size, |
aoqi@0 | 2184 | size_t alignment_hint, bool exec, |
aoqi@0 | 2185 | const char* mesg) { |
aoqi@0 | 2186 | os::Aix::commit_memory_impl(addr, size, alignment_hint, exec); |
aoqi@0 | 2187 | } |
aoqi@0 | 2188 | |
aoqi@0 | 2189 | bool os::pd_uncommit_memory(char* addr, size_t size) { |
aoqi@0 | 2190 | |
aoqi@0 | 2191 | // Delegate to ShmBkBlock class which knows how to uncommit its memory. |
aoqi@0 | 2192 | |
aoqi@0 | 2193 | bool rc = false; |
aoqi@0 | 2194 | LOCK_SHMBK |
aoqi@0 | 2195 | ShmBkBlock* const block = shmbk_find_by_containing_address(addr); |
aoqi@0 | 2196 | if (!block) { |
aoqi@0 | 2197 | fprintf(stderr, "invalid pointer: 0x%p.\n", addr); |
aoqi@0 | 2198 | shmbk_dump_info(); |
aoqi@0 | 2199 | assert(false, "invalid pointer"); |
aoqi@0 | 2200 | return false; |
aoqi@0 | 2201 | } else if (!block->containsRange(addr, size)) { |
aoqi@0 | 2202 | fprintf(stderr, "invalid range: 0x%p .. 0x%p.\n", addr, addr + size); |
aoqi@0 | 2203 | shmbk_dump_info(); |
aoqi@0 | 2204 | assert(false, "invalid range"); |
aoqi@0 | 2205 | return false; |
aoqi@0 | 2206 | } |
aoqi@0 | 2207 | rc = block->disclaim(addr, size); |
aoqi@0 | 2208 | UNLOCK_SHMBK |
aoqi@0 | 2209 | |
aoqi@0 | 2210 | if (Verbose && !rc) { |
aoqi@0 | 2211 | warning("failed to disclaim 0x%p .. 0x%p (0x%llX bytes).", addr, addr + size, size); |
aoqi@0 | 2212 | } |
aoqi@0 | 2213 | return rc; |
aoqi@0 | 2214 | } |
aoqi@0 | 2215 | |
aoqi@0 | 2216 | bool os::pd_create_stack_guard_pages(char* addr, size_t size) { |
aoqi@0 | 2217 | return os::guard_memory(addr, size); |
aoqi@0 | 2218 | } |
aoqi@0 | 2219 | |
aoqi@0 | 2220 | bool os::remove_stack_guard_pages(char* addr, size_t size) { |
aoqi@0 | 2221 | return os::unguard_memory(addr, size); |
aoqi@0 | 2222 | } |
aoqi@0 | 2223 | |
aoqi@0 | 2224 | void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { |
aoqi@0 | 2225 | } |
aoqi@0 | 2226 | |
aoqi@0 | 2227 | void os::pd_free_memory(char *addr, size_t bytes, size_t alignment_hint) { |
aoqi@0 | 2228 | } |
aoqi@0 | 2229 | |
aoqi@0 | 2230 | void os::numa_make_global(char *addr, size_t bytes) { |
aoqi@0 | 2231 | } |
aoqi@0 | 2232 | |
aoqi@0 | 2233 | void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { |
aoqi@0 | 2234 | } |
aoqi@0 | 2235 | |
aoqi@0 | 2236 | bool os::numa_topology_changed() { |
aoqi@0 | 2237 | return false; |
aoqi@0 | 2238 | } |
aoqi@0 | 2239 | |
aoqi@0 | 2240 | size_t os::numa_get_groups_num() { |
aoqi@0 | 2241 | return 1; |
aoqi@0 | 2242 | } |
aoqi@0 | 2243 | |
aoqi@0 | 2244 | int os::numa_get_group_id() { |
aoqi@0 | 2245 | return 0; |
aoqi@0 | 2246 | } |
aoqi@0 | 2247 | |
aoqi@0 | 2248 | size_t os::numa_get_leaf_groups(int *ids, size_t size) { |
aoqi@0 | 2249 | if (size > 0) { |
aoqi@0 | 2250 | ids[0] = 0; |
aoqi@0 | 2251 | return 1; |
aoqi@0 | 2252 | } |
aoqi@0 | 2253 | return 0; |
aoqi@0 | 2254 | } |
aoqi@0 | 2255 | |
aoqi@0 | 2256 | bool os::get_page_info(char *start, page_info* info) { |
aoqi@0 | 2257 | return false; |
aoqi@0 | 2258 | } |
aoqi@0 | 2259 | |
aoqi@0 | 2260 | char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { |
aoqi@0 | 2261 | return end; |
aoqi@0 | 2262 | } |
aoqi@0 | 2263 | |
aoqi@0 | 2264 | // Flags for reserve_shmatted_memory: |
aoqi@0 | 2265 | #define RESSHM_WISHADDR_OR_FAIL 1 |
aoqi@0 | 2266 | #define RESSHM_TRY_16M_PAGES 2 |
aoqi@0 | 2267 | #define RESSHM_16M_PAGES_OR_FAIL 4 |
aoqi@0 | 2268 | |
aoqi@0 | 2269 | // Result of reserve_shmatted_memory: |
aoqi@0 | 2270 | struct shmatted_memory_info_t { |
aoqi@0 | 2271 | char* addr; |
aoqi@0 | 2272 | size_t pagesize; |
aoqi@0 | 2273 | bool pinned; |
aoqi@0 | 2274 | }; |
aoqi@0 | 2275 | |
aoqi@0 | 2276 | // Reserve a section of shmatted memory. |
aoqi@0 | 2277 | // params: |
aoqi@0 | 2278 | // bytes [in]: size of memory, in bytes |
aoqi@0 | 2279 | // requested_addr [in]: wish address. |
aoqi@0 | 2280 | // NULL = no wish. |
aoqi@0 | 2281 | // If RESSHM_WISHADDR_OR_FAIL is set in flags and wish address cannot |
aoqi@0 | 2282 | // be obtained, function will fail. Otherwise wish address is treated as hint and |
aoqi@0 | 2283 | // another pointer is returned. |
aoqi@0 | 2284 | // flags [in]: some flags. Valid flags are: |
aoqi@0 | 2285 | // RESSHM_WISHADDR_OR_FAIL - fail if wish address is given and cannot be obtained. |
aoqi@0 | 2286 | // RESSHM_TRY_16M_PAGES - try to allocate from 16M page pool |
aoqi@0 | 2287 | // (requires UseLargePages and Use16MPages) |
aoqi@0 | 2288 | // RESSHM_16M_PAGES_OR_FAIL - if you cannot allocate from 16M page pool, fail. |
aoqi@0 | 2289 | // Otherwise any other page size will do. |
aoqi@0 | 2290 | // p_info [out] : holds information about the created shared memory segment. |
aoqi@0 | 2291 | static bool reserve_shmatted_memory(size_t bytes, char* requested_addr, int flags, shmatted_memory_info_t* p_info) { |
aoqi@0 | 2292 | |
aoqi@0 | 2293 | assert(p_info, "parameter error"); |
aoqi@0 | 2294 | |
aoqi@0 | 2295 | // init output struct. |
aoqi@0 | 2296 | p_info->addr = NULL; |
aoqi@0 | 2297 | |
aoqi@0 | 2298 | // neither should we be here for EXTSHM=ON. |
aoqi@0 | 2299 | if (os::Aix::extshm()) { |
aoqi@0 | 2300 | ShouldNotReachHere(); |
aoqi@0 | 2301 | } |
aoqi@0 | 2302 | |
aoqi@0 | 2303 | // extract flags. sanity checks. |
aoqi@0 | 2304 | const bool wishaddr_or_fail = |
aoqi@0 | 2305 | flags & RESSHM_WISHADDR_OR_FAIL; |
aoqi@0 | 2306 | const bool try_16M_pages = |
aoqi@0 | 2307 | flags & RESSHM_TRY_16M_PAGES; |
aoqi@0 | 2308 | const bool f16M_pages_or_fail = |
aoqi@0 | 2309 | flags & RESSHM_16M_PAGES_OR_FAIL; |
aoqi@0 | 2310 | |
aoqi@0 | 2311 | // first check: if a wish address is given and it is mandatory, but not aligned to segment boundary, |
aoqi@0 | 2312 | // shmat will fail anyway, so save some cycles by failing right away |
aoqi@0 | 2313 | if (requested_addr && ((uintptr_t)requested_addr % SIZE_256M == 0)) { |
aoqi@0 | 2314 | if (wishaddr_or_fail) { |
aoqi@0 | 2315 | return false; |
aoqi@0 | 2316 | } else { |
aoqi@0 | 2317 | requested_addr = NULL; |
aoqi@0 | 2318 | } |
aoqi@0 | 2319 | } |
aoqi@0 | 2320 | |
aoqi@0 | 2321 | char* addr = NULL; |
aoqi@0 | 2322 | |
aoqi@0 | 2323 | // Align size of shm up to the largest possible page size, to avoid errors later on when we try to change |
aoqi@0 | 2324 | // pagesize dynamically. |
aoqi@0 | 2325 | const size_t size = align_size_up(bytes, SIZE_16M); |
aoqi@0 | 2326 | |
aoqi@0 | 2327 | // reserve the shared segment |
aoqi@0 | 2328 | int shmid = shmget(IPC_PRIVATE, size, IPC_CREAT | S_IRUSR | S_IWUSR); |
aoqi@0 | 2329 | if (shmid == -1) { |
aoqi@0 | 2330 | warning("shmget(.., %lld, ..) failed (errno: %d).", size, errno); |
aoqi@0 | 2331 | return false; |
aoqi@0 | 2332 | } |
aoqi@0 | 2333 | |
aoqi@0 | 2334 | // Important note: |
aoqi@0 | 2335 | // It is very important that we, upon leaving this function, do not leave a shm segment alive. |
aoqi@0 | 2336 | // We must right after attaching it remove it from the system. System V shm segments are global and |
aoqi@0 | 2337 | // survive the process. |
aoqi@0 | 2338 | // So, from here on: Do not assert. Do not return. Always do a "goto cleanup_shm". |
aoqi@0 | 2339 | |
aoqi@0 | 2340 | // try forcing the page size |
aoqi@0 | 2341 | size_t pagesize = -1; // unknown so far |
aoqi@0 | 2342 | |
aoqi@0 | 2343 | if (UseLargePages) { |
aoqi@0 | 2344 | |
aoqi@0 | 2345 | struct shmid_ds shmbuf; |
aoqi@0 | 2346 | memset(&shmbuf, 0, sizeof(shmbuf)); |
aoqi@0 | 2347 | |
aoqi@0 | 2348 | // First, try to take from 16M page pool if... |
aoqi@0 | 2349 | if (os::Aix::can_use_16M_pages() // we can ... |
aoqi@0 | 2350 | && Use16MPages // we are not explicitly forbidden to do so (-XX:-Use16MPages).. |
aoqi@0 | 2351 | && try_16M_pages) { // caller wants us to. |
aoqi@0 | 2352 | shmbuf.shm_pagesize = SIZE_16M; |
aoqi@0 | 2353 | if (shmctl(shmid, SHM_PAGESIZE, &shmbuf) == 0) { |
aoqi@0 | 2354 | pagesize = SIZE_16M; |
aoqi@0 | 2355 | } else { |
aoqi@0 | 2356 | warning("Failed to allocate %d 16M pages. 16M page pool might be exhausted. (shmctl failed with %d)", |
aoqi@0 | 2357 | size / SIZE_16M, errno); |
aoqi@0 | 2358 | if (f16M_pages_or_fail) { |
aoqi@0 | 2359 | goto cleanup_shm; |
aoqi@0 | 2360 | } |
aoqi@0 | 2361 | } |
aoqi@0 | 2362 | } |
aoqi@0 | 2363 | |
aoqi@0 | 2364 | // Nothing yet? Try setting 64K pages. Note that I never saw this fail, but in theory it might, |
aoqi@0 | 2365 | // because the 64K page pool may also be exhausted. |
aoqi@0 | 2366 | if (pagesize == -1) { |
aoqi@0 | 2367 | shmbuf.shm_pagesize = SIZE_64K; |
aoqi@0 | 2368 | if (shmctl(shmid, SHM_PAGESIZE, &shmbuf) == 0) { |
aoqi@0 | 2369 | pagesize = SIZE_64K; |
aoqi@0 | 2370 | } else { |
aoqi@0 | 2371 | warning("Failed to allocate %d 64K pages. (shmctl failed with %d)", |
aoqi@0 | 2372 | size / SIZE_64K, errno); |
aoqi@0 | 2373 | // here I give up. leave page_size -1 - later, after attaching, we will query the |
aoqi@0 | 2374 | // real page size of the attached memory. (in theory, it may be something different |
aoqi@0 | 2375 | // from 4K if LDR_CNTRL SHM_PSIZE is set) |
aoqi@0 | 2376 | } |
aoqi@0 | 2377 | } |
aoqi@0 | 2378 | } |
aoqi@0 | 2379 | |
aoqi@0 | 2380 | // sanity point |
aoqi@0 | 2381 | assert(pagesize == -1 || pagesize == SIZE_16M || pagesize == SIZE_64K, "wrong page size"); |
aoqi@0 | 2382 | |
aoqi@0 | 2383 | // Now attach the shared segment. |
aoqi@0 | 2384 | addr = (char*) shmat(shmid, requested_addr, 0); |
aoqi@0 | 2385 | if (addr == (char*)-1) { |
aoqi@0 | 2386 | // How to handle attach failure: |
aoqi@0 | 2387 | // If it failed for a specific wish address, tolerate this: in that case, if wish address was |
aoqi@0 | 2388 | // mandatory, fail, if not, retry anywhere. |
aoqi@0 | 2389 | // If it failed for any other reason, treat that as fatal error. |
aoqi@0 | 2390 | addr = NULL; |
aoqi@0 | 2391 | if (requested_addr) { |
aoqi@0 | 2392 | if (wishaddr_or_fail) { |
aoqi@0 | 2393 | goto cleanup_shm; |
aoqi@0 | 2394 | } else { |
aoqi@0 | 2395 | addr = (char*) shmat(shmid, NULL, 0); |
aoqi@0 | 2396 | if (addr == (char*)-1) { // fatal |
aoqi@0 | 2397 | addr = NULL; |
aoqi@0 | 2398 | warning("shmat failed (errno: %d)", errno); |
aoqi@0 | 2399 | goto cleanup_shm; |
aoqi@0 | 2400 | } |
aoqi@0 | 2401 | } |
aoqi@0 | 2402 | } else { // fatal |
aoqi@0 | 2403 | addr = NULL; |
aoqi@0 | 2404 | warning("shmat failed (errno: %d)", errno); |
aoqi@0 | 2405 | goto cleanup_shm; |
aoqi@0 | 2406 | } |
aoqi@0 | 2407 | } |
aoqi@0 | 2408 | |
aoqi@0 | 2409 | // sanity point |
aoqi@0 | 2410 | assert(addr && addr != (char*) -1, "wrong address"); |
aoqi@0 | 2411 | |
aoqi@0 | 2412 | // after successful Attach remove the segment - right away. |
aoqi@0 | 2413 | if (::shmctl(shmid, IPC_RMID, NULL) == -1) { |
aoqi@0 | 2414 | warning("shmctl(%u, IPC_RMID) failed (%d)\n", shmid, errno); |
aoqi@0 | 2415 | guarantee(false, "failed to remove shared memory segment!"); |
aoqi@0 | 2416 | } |
aoqi@0 | 2417 | shmid = -1; |
aoqi@0 | 2418 | |
aoqi@0 | 2419 | // query the real page size. In case setting the page size did not work (see above), the system |
aoqi@0 | 2420 | // may have given us something other then 4K (LDR_CNTRL) |
aoqi@0 | 2421 | { |
aoqi@0 | 2422 | const size_t real_pagesize = os::Aix::query_pagesize(addr); |
aoqi@0 | 2423 | if (pagesize != -1) { |
aoqi@0 | 2424 | assert(pagesize == real_pagesize, "unexpected pagesize after shmat"); |
aoqi@0 | 2425 | } else { |
aoqi@0 | 2426 | pagesize = real_pagesize; |
aoqi@0 | 2427 | } |
aoqi@0 | 2428 | } |
aoqi@0 | 2429 | |
aoqi@0 | 2430 | // Now register the reserved block with internal book keeping. |
aoqi@0 | 2431 | LOCK_SHMBK |
aoqi@0 | 2432 | const bool pinned = pagesize >= SIZE_16M ? true : false; |
aoqi@0 | 2433 | ShmBkShmatedBlock* const p_block = new ShmBkShmatedBlock(AddrRange(addr, size), pagesize, pinned); |
aoqi@0 | 2434 | assert(p_block, ""); |
aoqi@0 | 2435 | shmbk_register(p_block); |
aoqi@0 | 2436 | UNLOCK_SHMBK |
aoqi@0 | 2437 | |
aoqi@0 | 2438 | cleanup_shm: |
aoqi@0 | 2439 | |
aoqi@0 | 2440 | // if we have not done so yet, remove the shared memory segment. This is very important. |
aoqi@0 | 2441 | if (shmid != -1) { |
aoqi@0 | 2442 | if (::shmctl(shmid, IPC_RMID, NULL) == -1) { |
aoqi@0 | 2443 | warning("shmctl(%u, IPC_RMID) failed (%d)\n", shmid, errno); |
aoqi@0 | 2444 | guarantee(false, "failed to remove shared memory segment!"); |
aoqi@0 | 2445 | } |
aoqi@0 | 2446 | shmid = -1; |
aoqi@0 | 2447 | } |
aoqi@0 | 2448 | |
aoqi@0 | 2449 | // trace |
aoqi@0 | 2450 | if (Verbose && !addr) { |
aoqi@0 | 2451 | if (requested_addr != NULL) { |
aoqi@0 | 2452 | warning("failed to shm-allocate 0x%llX bytes at wish address 0x%p.", size, requested_addr); |
aoqi@0 | 2453 | } else { |
aoqi@0 | 2454 | warning("failed to shm-allocate 0x%llX bytes at any address.", size); |
aoqi@0 | 2455 | } |
aoqi@0 | 2456 | } |
aoqi@0 | 2457 | |
aoqi@0 | 2458 | // hand info to caller |
aoqi@0 | 2459 | if (addr) { |
aoqi@0 | 2460 | p_info->addr = addr; |
aoqi@0 | 2461 | p_info->pagesize = pagesize; |
aoqi@0 | 2462 | p_info->pinned = pagesize == SIZE_16M ? true : false; |
aoqi@0 | 2463 | } |
aoqi@0 | 2464 | |
aoqi@0 | 2465 | // sanity test: |
aoqi@0 | 2466 | if (requested_addr && addr && wishaddr_or_fail) { |
aoqi@0 | 2467 | guarantee(addr == requested_addr, "shmat error"); |
aoqi@0 | 2468 | } |
aoqi@0 | 2469 | |
aoqi@0 | 2470 | // just one more test to really make sure we have no dangling shm segments. |
aoqi@0 | 2471 | guarantee(shmid == -1, "dangling shm segments"); |
aoqi@0 | 2472 | |
aoqi@0 | 2473 | return addr ? true : false; |
aoqi@0 | 2474 | |
aoqi@0 | 2475 | } // end: reserve_shmatted_memory |
aoqi@0 | 2476 | |
aoqi@0 | 2477 | // Reserve memory using mmap. Behaves the same as reserve_shmatted_memory(): |
aoqi@0 | 2478 | // will return NULL in case of an error. |
aoqi@0 | 2479 | static char* reserve_mmaped_memory(size_t bytes, char* requested_addr) { |
aoqi@0 | 2480 | |
aoqi@0 | 2481 | // if a wish address is given, but not aligned to 4K page boundary, mmap will fail. |
aoqi@0 | 2482 | if (requested_addr && ((uintptr_t)requested_addr % os::vm_page_size() != 0)) { |
aoqi@0 | 2483 | warning("Wish address 0x%p not aligned to page boundary.", requested_addr); |
aoqi@0 | 2484 | return NULL; |
aoqi@0 | 2485 | } |
aoqi@0 | 2486 | |
aoqi@0 | 2487 | const size_t size = align_size_up(bytes, SIZE_4K); |
aoqi@0 | 2488 | |
aoqi@0 | 2489 | // Note: MAP_SHARED (instead of MAP_PRIVATE) needed to be able to |
aoqi@0 | 2490 | // msync(MS_INVALIDATE) (see os::uncommit_memory) |
aoqi@0 | 2491 | int flags = MAP_ANONYMOUS | MAP_SHARED; |
aoqi@0 | 2492 | |
aoqi@0 | 2493 | // MAP_FIXED is needed to enforce requested_addr - manpage is vague about what |
aoqi@0 | 2494 | // it means if wishaddress is given but MAP_FIXED is not set. |
aoqi@0 | 2495 | // |
aoqi@0 | 2496 | // Note however that this changes semantics in SPEC1170 mode insofar as MAP_FIXED |
aoqi@0 | 2497 | // clobbers the address range, which is probably not what the caller wants. That's |
aoqi@0 | 2498 | // why I assert here (again) that the SPEC1170 compat mode is off. |
aoqi@0 | 2499 | // If we want to be able to run under SPEC1170, we have to do some porting and |
aoqi@0 | 2500 | // testing. |
aoqi@0 | 2501 | if (requested_addr != NULL) { |
aoqi@0 | 2502 | assert(!os::Aix::xpg_sus_mode(), "SPEC1170 mode not allowed."); |
aoqi@0 | 2503 | flags |= MAP_FIXED; |
aoqi@0 | 2504 | } |
aoqi@0 | 2505 | |
aoqi@0 | 2506 | char* addr = (char*)::mmap(requested_addr, size, PROT_READ|PROT_WRITE|PROT_EXEC, flags, -1, 0); |
aoqi@0 | 2507 | |
aoqi@0 | 2508 | if (addr == MAP_FAILED) { |
aoqi@0 | 2509 | // attach failed: tolerate for specific wish addresses. Not being able to attach |
aoqi@0 | 2510 | // anywhere is a fatal error. |
aoqi@0 | 2511 | if (requested_addr == NULL) { |
aoqi@0 | 2512 | // It's ok to fail here if the machine has not enough memory. |
aoqi@0 | 2513 | warning("mmap(NULL, 0x%llX, ..) failed (%d)", size, errno); |
aoqi@0 | 2514 | } |
aoqi@0 | 2515 | addr = NULL; |
aoqi@0 | 2516 | goto cleanup_mmap; |
aoqi@0 | 2517 | } |
aoqi@0 | 2518 | |
aoqi@0 | 2519 | // If we did request a specific address and that address was not available, fail. |
aoqi@0 | 2520 | if (addr && requested_addr) { |
aoqi@0 | 2521 | guarantee(addr == requested_addr, "unexpected"); |
aoqi@0 | 2522 | } |
aoqi@0 | 2523 | |
aoqi@0 | 2524 | // register this mmap'ed segment with book keeping |
aoqi@0 | 2525 | LOCK_SHMBK |
aoqi@0 | 2526 | ShmBkMappedBlock* const p_block = new ShmBkMappedBlock(AddrRange(addr, size)); |
aoqi@0 | 2527 | assert(p_block, ""); |
aoqi@0 | 2528 | shmbk_register(p_block); |
aoqi@0 | 2529 | UNLOCK_SHMBK |
aoqi@0 | 2530 | |
aoqi@0 | 2531 | cleanup_mmap: |
aoqi@0 | 2532 | |
aoqi@0 | 2533 | // trace |
aoqi@0 | 2534 | if (Verbose) { |
aoqi@0 | 2535 | if (addr) { |
aoqi@0 | 2536 | fprintf(stderr, "mmap-allocated 0x%p .. 0x%p (0x%llX bytes)\n", addr, addr + bytes, bytes); |
aoqi@0 | 2537 | } |
aoqi@0 | 2538 | else { |
aoqi@0 | 2539 | if (requested_addr != NULL) { |
aoqi@0 | 2540 | warning("failed to mmap-allocate 0x%llX bytes at wish address 0x%p.", bytes, requested_addr); |
aoqi@0 | 2541 | } else { |
aoqi@0 | 2542 | warning("failed to mmap-allocate 0x%llX bytes at any address.", bytes); |
aoqi@0 | 2543 | } |
aoqi@0 | 2544 | } |
aoqi@0 | 2545 | } |
aoqi@0 | 2546 | |
aoqi@0 | 2547 | return addr; |
aoqi@0 | 2548 | |
aoqi@0 | 2549 | } // end: reserve_mmaped_memory |
aoqi@0 | 2550 | |
aoqi@0 | 2551 | // Reserves and attaches a shared memory segment. |
aoqi@0 | 2552 | // Will assert if a wish address is given and could not be obtained. |
aoqi@0 | 2553 | char* os::pd_reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) { |
aoqi@0 | 2554 | return os::attempt_reserve_memory_at(bytes, requested_addr); |
aoqi@0 | 2555 | } |
aoqi@0 | 2556 | |
aoqi@0 | 2557 | bool os::pd_release_memory(char* addr, size_t size) { |
aoqi@0 | 2558 | |
aoqi@0 | 2559 | // delegate to ShmBkBlock class which knows how to uncommit its memory. |
aoqi@0 | 2560 | |
aoqi@0 | 2561 | bool rc = false; |
aoqi@0 | 2562 | LOCK_SHMBK |
aoqi@0 | 2563 | ShmBkBlock* const block = shmbk_find_by_containing_address(addr); |
aoqi@0 | 2564 | if (!block) { |
aoqi@0 | 2565 | fprintf(stderr, "invalid pointer: 0x%p.\n", addr); |
aoqi@0 | 2566 | shmbk_dump_info(); |
aoqi@0 | 2567 | assert(false, "invalid pointer"); |
aoqi@0 | 2568 | return false; |
aoqi@0 | 2569 | } |
aoqi@0 | 2570 | else if (!block->isSameRange(addr, size)) { |
aoqi@0 | 2571 | if (block->getType() == ShmBkBlock::MMAP) { |
aoqi@0 | 2572 | // Release only the same range or a the beginning or the end of a range. |
aoqi@0 | 2573 | if (block->base() == addr && size < block->size()) { |
aoqi@0 | 2574 | ShmBkMappedBlock* const b = new ShmBkMappedBlock(AddrRange(block->base() + size, block->size() - size)); |
aoqi@0 | 2575 | assert(b, ""); |
aoqi@0 | 2576 | shmbk_register(b); |
aoqi@0 | 2577 | block->setAddrRange(AddrRange(addr, size)); |
aoqi@0 | 2578 | } |
aoqi@0 | 2579 | else if (addr > block->base() && addr + size == block->base() + block->size()) { |
aoqi@0 | 2580 | ShmBkMappedBlock* const b = new ShmBkMappedBlock(AddrRange(block->base(), block->size() - size)); |
aoqi@0 | 2581 | assert(b, ""); |
aoqi@0 | 2582 | shmbk_register(b); |
aoqi@0 | 2583 | block->setAddrRange(AddrRange(addr, size)); |
aoqi@0 | 2584 | } |
aoqi@0 | 2585 | else { |
aoqi@0 | 2586 | fprintf(stderr, "invalid mmap range: 0x%p .. 0x%p.\n", addr, addr + size); |
aoqi@0 | 2587 | shmbk_dump_info(); |
aoqi@0 | 2588 | assert(false, "invalid mmap range"); |
aoqi@0 | 2589 | return false; |
aoqi@0 | 2590 | } |
aoqi@0 | 2591 | } |
aoqi@0 | 2592 | else { |
aoqi@0 | 2593 | // Release only the same range. No partial release allowed. |
aoqi@0 | 2594 | // Soften the requirement a bit, because the user may think he owns a smaller size |
aoqi@0 | 2595 | // than the block is due to alignment etc. |
aoqi@0 | 2596 | if (block->base() != addr || block->size() < size) { |
aoqi@0 | 2597 | fprintf(stderr, "invalid shmget range: 0x%p .. 0x%p.\n", addr, addr + size); |
aoqi@0 | 2598 | shmbk_dump_info(); |
aoqi@0 | 2599 | assert(false, "invalid shmget range"); |
aoqi@0 | 2600 | return false; |
aoqi@0 | 2601 | } |
aoqi@0 | 2602 | } |
aoqi@0 | 2603 | } |
aoqi@0 | 2604 | rc = block->release(); |
aoqi@0 | 2605 | assert(rc, "release failed"); |
aoqi@0 | 2606 | // remove block from bookkeeping |
aoqi@0 | 2607 | shmbk_unregister(block); |
aoqi@0 | 2608 | delete block; |
aoqi@0 | 2609 | UNLOCK_SHMBK |
aoqi@0 | 2610 | |
aoqi@0 | 2611 | if (!rc) { |
aoqi@0 | 2612 | warning("failed to released %lu bytes at 0x%p", size, addr); |
aoqi@0 | 2613 | } |
aoqi@0 | 2614 | |
aoqi@0 | 2615 | return rc; |
aoqi@0 | 2616 | } |
aoqi@0 | 2617 | |
aoqi@0 | 2618 | static bool checked_mprotect(char* addr, size_t size, int prot) { |
aoqi@0 | 2619 | |
aoqi@0 | 2620 | // Little problem here: if SPEC1170 behaviour is off, mprotect() on AIX will |
aoqi@0 | 2621 | // not tell me if protection failed when trying to protect an un-protectable range. |
aoqi@0 | 2622 | // |
aoqi@0 | 2623 | // This means if the memory was allocated using shmget/shmat, protection wont work |
aoqi@0 | 2624 | // but mprotect will still return 0: |
aoqi@0 | 2625 | // |
aoqi@0 | 2626 | // See http://publib.boulder.ibm.com/infocenter/pseries/v5r3/index.jsp?topic=/com.ibm.aix.basetechref/doc/basetrf1/mprotect.htm |
aoqi@0 | 2627 | |
aoqi@0 | 2628 | bool rc = ::mprotect(addr, size, prot) == 0 ? true : false; |
aoqi@0 | 2629 | |
aoqi@0 | 2630 | if (!rc) { |
aoqi@0 | 2631 | const char* const s_errno = strerror(errno); |
aoqi@0 | 2632 | warning("mprotect(" PTR_FORMAT "-" PTR_FORMAT ", 0x%X) failed (%s).", addr, addr + size, prot, s_errno); |
aoqi@0 | 2633 | return false; |
aoqi@0 | 2634 | } |
aoqi@0 | 2635 | |
aoqi@0 | 2636 | // mprotect success check |
aoqi@0 | 2637 | // |
aoqi@0 | 2638 | // Mprotect said it changed the protection but can I believe it? |
aoqi@0 | 2639 | // |
aoqi@0 | 2640 | // To be sure I need to check the protection afterwards. Try to |
aoqi@0 | 2641 | // read from protected memory and check whether that causes a segfault. |
aoqi@0 | 2642 | // |
aoqi@0 | 2643 | if (!os::Aix::xpg_sus_mode()) { |
aoqi@0 | 2644 | |
aoqi@0 | 2645 | if (StubRoutines::SafeFetch32_stub()) { |
aoqi@0 | 2646 | |
aoqi@0 | 2647 | const bool read_protected = |
aoqi@0 | 2648 | (SafeFetch32((int*)addr, 0x12345678) == 0x12345678 && |
aoqi@0 | 2649 | SafeFetch32((int*)addr, 0x76543210) == 0x76543210) ? true : false; |
aoqi@0 | 2650 | |
aoqi@0 | 2651 | if (prot & PROT_READ) { |
aoqi@0 | 2652 | rc = !read_protected; |
aoqi@0 | 2653 | } else { |
aoqi@0 | 2654 | rc = read_protected; |
aoqi@0 | 2655 | } |
aoqi@0 | 2656 | } |
aoqi@0 | 2657 | } |
aoqi@0 | 2658 | if (!rc) { |
aoqi@0 | 2659 | assert(false, "mprotect failed."); |
aoqi@0 | 2660 | } |
aoqi@0 | 2661 | return rc; |
aoqi@0 | 2662 | } |
aoqi@0 | 2663 | |
aoqi@0 | 2664 | // Set protections specified |
aoqi@0 | 2665 | bool os::protect_memory(char* addr, size_t size, ProtType prot, bool is_committed) { |
aoqi@0 | 2666 | unsigned int p = 0; |
aoqi@0 | 2667 | switch (prot) { |
aoqi@0 | 2668 | case MEM_PROT_NONE: p = PROT_NONE; break; |
aoqi@0 | 2669 | case MEM_PROT_READ: p = PROT_READ; break; |
aoqi@0 | 2670 | case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; |
aoqi@0 | 2671 | case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; |
aoqi@0 | 2672 | default: |
aoqi@0 | 2673 | ShouldNotReachHere(); |
aoqi@0 | 2674 | } |
aoqi@0 | 2675 | // is_committed is unused. |
aoqi@0 | 2676 | return checked_mprotect(addr, size, p); |
aoqi@0 | 2677 | } |
aoqi@0 | 2678 | |
aoqi@0 | 2679 | bool os::guard_memory(char* addr, size_t size) { |
aoqi@0 | 2680 | return checked_mprotect(addr, size, PROT_NONE); |
aoqi@0 | 2681 | } |
aoqi@0 | 2682 | |
aoqi@0 | 2683 | bool os::unguard_memory(char* addr, size_t size) { |
aoqi@0 | 2684 | return checked_mprotect(addr, size, PROT_READ|PROT_WRITE|PROT_EXEC); |
aoqi@0 | 2685 | } |
aoqi@0 | 2686 | |
aoqi@0 | 2687 | // Large page support |
aoqi@0 | 2688 | |
aoqi@0 | 2689 | static size_t _large_page_size = 0; |
aoqi@0 | 2690 | |
aoqi@0 | 2691 | // Enable large page support if OS allows that. |
aoqi@0 | 2692 | void os::large_page_init() { |
aoqi@0 | 2693 | |
aoqi@0 | 2694 | // Note: os::Aix::query_multipage_support must run first. |
aoqi@0 | 2695 | |
aoqi@0 | 2696 | if (!UseLargePages) { |
aoqi@0 | 2697 | return; |
aoqi@0 | 2698 | } |
aoqi@0 | 2699 | |
aoqi@0 | 2700 | if (!Aix::can_use_64K_pages()) { |
aoqi@0 | 2701 | assert(!Aix::can_use_16M_pages(), "64K is a precondition for 16M."); |
aoqi@0 | 2702 | UseLargePages = false; |
aoqi@0 | 2703 | return; |
aoqi@0 | 2704 | } |
aoqi@0 | 2705 | |
aoqi@0 | 2706 | if (!Aix::can_use_16M_pages() && Use16MPages) { |
aoqi@0 | 2707 | fprintf(stderr, "Cannot use 16M pages. Please ensure that there is a 16M page pool " |
aoqi@0 | 2708 | " and that the VM runs with CAP_BYPASS_RAC_VMM and CAP_PROPAGATE capabilities.\n"); |
aoqi@0 | 2709 | } |
aoqi@0 | 2710 | |
aoqi@0 | 2711 | // Do not report 16M page alignment as part of os::_page_sizes if we are |
aoqi@0 | 2712 | // explicitly forbidden from using 16M pages. Doing so would increase the |
aoqi@0 | 2713 | // alignment the garbage collector calculates with, slightly increasing |
aoqi@0 | 2714 | // heap usage. We should only pay for 16M alignment if we really want to |
aoqi@0 | 2715 | // use 16M pages. |
aoqi@0 | 2716 | if (Use16MPages && Aix::can_use_16M_pages()) { |
aoqi@0 | 2717 | _large_page_size = SIZE_16M; |
aoqi@0 | 2718 | _page_sizes[0] = SIZE_16M; |
aoqi@0 | 2719 | _page_sizes[1] = SIZE_64K; |
aoqi@0 | 2720 | _page_sizes[2] = SIZE_4K; |
aoqi@0 | 2721 | _page_sizes[3] = 0; |
aoqi@0 | 2722 | } else if (Aix::can_use_64K_pages()) { |
aoqi@0 | 2723 | _large_page_size = SIZE_64K; |
aoqi@0 | 2724 | _page_sizes[0] = SIZE_64K; |
aoqi@0 | 2725 | _page_sizes[1] = SIZE_4K; |
aoqi@0 | 2726 | _page_sizes[2] = 0; |
aoqi@0 | 2727 | } |
aoqi@0 | 2728 | |
aoqi@0 | 2729 | if (Verbose) { |
aoqi@0 | 2730 | ("Default large page size is 0x%llX.", _large_page_size); |
aoqi@0 | 2731 | } |
aoqi@0 | 2732 | } // end: os::large_page_init() |
aoqi@0 | 2733 | |
aoqi@0 | 2734 | char* os::reserve_memory_special(size_t bytes, size_t alignment, char* req_addr, bool exec) { |
aoqi@0 | 2735 | // "exec" is passed in but not used. Creating the shared image for |
aoqi@0 | 2736 | // the code cache doesn't have an SHM_X executable permission to check. |
aoqi@0 | 2737 | Unimplemented(); |
aoqi@0 | 2738 | return 0; |
aoqi@0 | 2739 | } |
aoqi@0 | 2740 | |
aoqi@0 | 2741 | bool os::release_memory_special(char* base, size_t bytes) { |
aoqi@0 | 2742 | // detaching the SHM segment will also delete it, see reserve_memory_special() |
aoqi@0 | 2743 | Unimplemented(); |
aoqi@0 | 2744 | return false; |
aoqi@0 | 2745 | } |
aoqi@0 | 2746 | |
aoqi@0 | 2747 | size_t os::large_page_size() { |
aoqi@0 | 2748 | return _large_page_size; |
aoqi@0 | 2749 | } |
aoqi@0 | 2750 | |
aoqi@0 | 2751 | bool os::can_commit_large_page_memory() { |
aoqi@0 | 2752 | // Well, sadly we cannot commit anything at all (see comment in |
aoqi@0 | 2753 | // os::commit_memory) but we claim to so we can make use of large pages |
aoqi@0 | 2754 | return true; |
aoqi@0 | 2755 | } |
aoqi@0 | 2756 | |
aoqi@0 | 2757 | bool os::can_execute_large_page_memory() { |
aoqi@0 | 2758 | // We can do that |
aoqi@0 | 2759 | return true; |
aoqi@0 | 2760 | } |
aoqi@0 | 2761 | |
aoqi@0 | 2762 | // Reserve memory at an arbitrary address, only if that area is |
aoqi@0 | 2763 | // available (and not reserved for something else). |
aoqi@0 | 2764 | char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { |
aoqi@0 | 2765 | |
aoqi@0 | 2766 | bool use_mmap = false; |
aoqi@0 | 2767 | |
aoqi@0 | 2768 | // mmap: smaller graining, no large page support |
aoqi@0 | 2769 | // shm: large graining (256M), large page support, limited number of shm segments |
aoqi@0 | 2770 | // |
aoqi@0 | 2771 | // Prefer mmap wherever we either do not need large page support or have OS limits |
aoqi@0 | 2772 | |
aoqi@0 | 2773 | if (!UseLargePages || bytes < SIZE_16M) { |
aoqi@0 | 2774 | use_mmap = true; |
aoqi@0 | 2775 | } |
aoqi@0 | 2776 | |
aoqi@0 | 2777 | char* addr = NULL; |
aoqi@0 | 2778 | if (use_mmap) { |
aoqi@0 | 2779 | addr = reserve_mmaped_memory(bytes, requested_addr); |
aoqi@0 | 2780 | } else { |
aoqi@0 | 2781 | // shmat: wish address is mandatory, and do not try 16M pages here. |
aoqi@0 | 2782 | shmatted_memory_info_t info; |
aoqi@0 | 2783 | const int flags = RESSHM_WISHADDR_OR_FAIL; |
aoqi@0 | 2784 | if (reserve_shmatted_memory(bytes, requested_addr, flags, &info)) { |
aoqi@0 | 2785 | addr = info.addr; |
aoqi@0 | 2786 | } |
aoqi@0 | 2787 | } |
aoqi@0 | 2788 | |
aoqi@0 | 2789 | return addr; |
aoqi@0 | 2790 | } |
aoqi@0 | 2791 | |
aoqi@0 | 2792 | size_t os::read(int fd, void *buf, unsigned int nBytes) { |
aoqi@0 | 2793 | return ::read(fd, buf, nBytes); |
aoqi@0 | 2794 | } |
aoqi@0 | 2795 | |
aoqi@0 | 2796 | #define NANOSECS_PER_MILLISEC 1000000 |
aoqi@0 | 2797 | |
aoqi@0 | 2798 | int os::sleep(Thread* thread, jlong millis, bool interruptible) { |
aoqi@0 | 2799 | assert(thread == Thread::current(), "thread consistency check"); |
aoqi@0 | 2800 | |
aoqi@0 | 2801 | // Prevent nasty overflow in deadline calculation |
aoqi@0 | 2802 | // by handling long sleeps similar to solaris or windows. |
aoqi@0 | 2803 | const jlong limit = INT_MAX; |
aoqi@0 | 2804 | int result; |
aoqi@0 | 2805 | while (millis > limit) { |
aoqi@0 | 2806 | if ((result = os::sleep(thread, limit, interruptible)) != OS_OK) { |
aoqi@0 | 2807 | return result; |
aoqi@0 | 2808 | } |
aoqi@0 | 2809 | millis -= limit; |
aoqi@0 | 2810 | } |
aoqi@0 | 2811 | |
aoqi@0 | 2812 | ParkEvent * const slp = thread->_SleepEvent; |
aoqi@0 | 2813 | slp->reset(); |
aoqi@0 | 2814 | OrderAccess::fence(); |
aoqi@0 | 2815 | |
aoqi@0 | 2816 | if (interruptible) { |
aoqi@0 | 2817 | jlong prevtime = javaTimeNanos(); |
aoqi@0 | 2818 | |
aoqi@0 | 2819 | // Prevent precision loss and too long sleeps |
aoqi@0 | 2820 | jlong deadline = prevtime + millis * NANOSECS_PER_MILLISEC; |
aoqi@0 | 2821 | |
aoqi@0 | 2822 | for (;;) { |
aoqi@0 | 2823 | if (os::is_interrupted(thread, true)) { |
aoqi@0 | 2824 | return OS_INTRPT; |
aoqi@0 | 2825 | } |
aoqi@0 | 2826 | |
aoqi@0 | 2827 | jlong newtime = javaTimeNanos(); |
aoqi@0 | 2828 | |
aoqi@0 | 2829 | assert(newtime >= prevtime, "time moving backwards"); |
aoqi@0 | 2830 | // Doing prevtime and newtime in microseconds doesn't help precision, |
aoqi@0 | 2831 | // and trying to round up to avoid lost milliseconds can result in a |
aoqi@0 | 2832 | // too-short delay. |
aoqi@0 | 2833 | millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC; |
aoqi@0 | 2834 | |
aoqi@0 | 2835 | if (millis <= 0) { |
aoqi@0 | 2836 | return OS_OK; |
aoqi@0 | 2837 | } |
aoqi@0 | 2838 | |
aoqi@0 | 2839 | // Stop sleeping if we passed the deadline |
aoqi@0 | 2840 | if (newtime >= deadline) { |
aoqi@0 | 2841 | return OS_OK; |
aoqi@0 | 2842 | } |
aoqi@0 | 2843 | |
aoqi@0 | 2844 | prevtime = newtime; |
aoqi@0 | 2845 | |
aoqi@0 | 2846 | { |
aoqi@0 | 2847 | assert(thread->is_Java_thread(), "sanity check"); |
aoqi@0 | 2848 | JavaThread *jt = (JavaThread *) thread; |
aoqi@0 | 2849 | ThreadBlockInVM tbivm(jt); |
aoqi@0 | 2850 | OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); |
aoqi@0 | 2851 | |
aoqi@0 | 2852 | jt->set_suspend_equivalent(); |
aoqi@0 | 2853 | |
aoqi@0 | 2854 | slp->park(millis); |
aoqi@0 | 2855 | |
aoqi@0 | 2856 | // were we externally suspended while we were waiting? |
aoqi@0 | 2857 | jt->check_and_wait_while_suspended(); |
aoqi@0 | 2858 | } |
aoqi@0 | 2859 | } |
aoqi@0 | 2860 | } else { |
aoqi@0 | 2861 | OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); |
aoqi@0 | 2862 | jlong prevtime = javaTimeNanos(); |
aoqi@0 | 2863 | |
aoqi@0 | 2864 | // Prevent precision loss and too long sleeps |
aoqi@0 | 2865 | jlong deadline = prevtime + millis * NANOSECS_PER_MILLISEC; |
aoqi@0 | 2866 | |
aoqi@0 | 2867 | for (;;) { |
aoqi@0 | 2868 | // It'd be nice to avoid the back-to-back javaTimeNanos() calls on |
aoqi@0 | 2869 | // the 1st iteration ... |
aoqi@0 | 2870 | jlong newtime = javaTimeNanos(); |
aoqi@0 | 2871 | |
aoqi@0 | 2872 | if (newtime - prevtime < 0) { |
aoqi@0 | 2873 | // time moving backwards, should only happen if no monotonic clock |
aoqi@0 | 2874 | // not a guarantee() because JVM should not abort on kernel/glibc bugs |
aoqi@0 | 2875 | // - HS14 Commented out as not implemented. |
aoqi@0 | 2876 | // - TODO Maybe we should implement it? |
aoqi@0 | 2877 | //assert(!Aix::supports_monotonic_clock(), "time moving backwards"); |
aoqi@0 | 2878 | } else { |
aoqi@0 | 2879 | millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC; |
aoqi@0 | 2880 | } |
aoqi@0 | 2881 | |
aoqi@0 | 2882 | if (millis <= 0) break; |
aoqi@0 | 2883 | |
aoqi@0 | 2884 | if (newtime >= deadline) { |
aoqi@0 | 2885 | break; |
aoqi@0 | 2886 | } |
aoqi@0 | 2887 | |
aoqi@0 | 2888 | prevtime = newtime; |
aoqi@0 | 2889 | slp->park(millis); |
aoqi@0 | 2890 | } |
aoqi@0 | 2891 | return OS_OK; |
aoqi@0 | 2892 | } |
aoqi@0 | 2893 | } |
aoqi@0 | 2894 | |
aoqi@0 | 2895 | void os::naked_short_sleep(jlong ms) { |
aoqi@0 | 2896 | struct timespec req; |
aoqi@0 | 2897 | |
aoqi@0 | 2898 | assert(ms < 1000, "Un-interruptable sleep, short time use only"); |
aoqi@0 | 2899 | req.tv_sec = 0; |
aoqi@0 | 2900 | if (ms > 0) { |
aoqi@0 | 2901 | req.tv_nsec = (ms % 1000) * 1000000; |
aoqi@0 | 2902 | } |
aoqi@0 | 2903 | else { |
aoqi@0 | 2904 | req.tv_nsec = 1; |
aoqi@0 | 2905 | } |
aoqi@0 | 2906 | |
aoqi@0 | 2907 | nanosleep(&req, NULL); |
aoqi@0 | 2908 | |
aoqi@0 | 2909 | return; |
aoqi@0 | 2910 | } |
aoqi@0 | 2911 | |
aoqi@0 | 2912 | // Sleep forever; naked call to OS-specific sleep; use with CAUTION |
aoqi@0 | 2913 | void os::infinite_sleep() { |
aoqi@0 | 2914 | while (true) { // sleep forever ... |
aoqi@0 | 2915 | ::sleep(100); // ... 100 seconds at a time |
aoqi@0 | 2916 | } |
aoqi@0 | 2917 | } |
aoqi@0 | 2918 | |
aoqi@0 | 2919 | // Used to convert frequent JVM_Yield() to nops |
aoqi@0 | 2920 | bool os::dont_yield() { |
aoqi@0 | 2921 | return DontYieldALot; |
aoqi@0 | 2922 | } |
aoqi@0 | 2923 | |
aoqi@0 | 2924 | void os::yield() { |
aoqi@0 | 2925 | sched_yield(); |
aoqi@0 | 2926 | } |
aoqi@0 | 2927 | |
aoqi@0 | 2928 | os::YieldResult os::NakedYield() { sched_yield(); return os::YIELD_UNKNOWN; } |
aoqi@0 | 2929 | |
aoqi@0 | 2930 | void os::yield_all(int attempts) { |
aoqi@0 | 2931 | // Yields to all threads, including threads with lower priorities |
aoqi@0 | 2932 | // Threads on Linux are all with same priority. The Solaris style |
aoqi@0 | 2933 | // os::yield_all() with nanosleep(1ms) is not necessary. |
aoqi@0 | 2934 | sched_yield(); |
aoqi@0 | 2935 | } |
aoqi@0 | 2936 | |
aoqi@0 | 2937 | // Called from the tight loops to possibly influence time-sharing heuristics |
aoqi@0 | 2938 | void os::loop_breaker(int attempts) { |
aoqi@0 | 2939 | os::yield_all(attempts); |
aoqi@0 | 2940 | } |
aoqi@0 | 2941 | |
aoqi@0 | 2942 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 2943 | // thread priority support |
aoqi@0 | 2944 | |
aoqi@0 | 2945 | // From AIX manpage to pthread_setschedparam |
aoqi@0 | 2946 | // (see: http://publib.boulder.ibm.com/infocenter/pseries/v5r3/index.jsp? |
aoqi@0 | 2947 | // topic=/com.ibm.aix.basetechref/doc/basetrf1/pthread_setschedparam.htm): |
aoqi@0 | 2948 | // |
aoqi@0 | 2949 | // "If schedpolicy is SCHED_OTHER, then sched_priority must be in the |
aoqi@0 | 2950 | // range from 40 to 80, where 40 is the least favored priority and 80 |
aoqi@0 | 2951 | // is the most favored." |
aoqi@0 | 2952 | // |
aoqi@0 | 2953 | // (Actually, I doubt this even has an impact on AIX, as we do kernel |
aoqi@0 | 2954 | // scheduling there; however, this still leaves iSeries.) |
aoqi@0 | 2955 | // |
aoqi@0 | 2956 | // We use the same values for AIX and PASE. |
aoqi@0 | 2957 | int os::java_to_os_priority[CriticalPriority + 1] = { |
aoqi@0 | 2958 | 54, // 0 Entry should never be used |
aoqi@0 | 2959 | |
aoqi@0 | 2960 | 55, // 1 MinPriority |
aoqi@0 | 2961 | 55, // 2 |
aoqi@0 | 2962 | 56, // 3 |
aoqi@0 | 2963 | |
aoqi@0 | 2964 | 56, // 4 |
aoqi@0 | 2965 | 57, // 5 NormPriority |
aoqi@0 | 2966 | 57, // 6 |
aoqi@0 | 2967 | |
aoqi@0 | 2968 | 58, // 7 |
aoqi@0 | 2969 | 58, // 8 |
aoqi@0 | 2970 | 59, // 9 NearMaxPriority |
aoqi@0 | 2971 | |
aoqi@0 | 2972 | 60, // 10 MaxPriority |
aoqi@0 | 2973 | |
aoqi@0 | 2974 | 60 // 11 CriticalPriority |
aoqi@0 | 2975 | }; |
aoqi@0 | 2976 | |
aoqi@0 | 2977 | OSReturn os::set_native_priority(Thread* thread, int newpri) { |
aoqi@0 | 2978 | if (!UseThreadPriorities) return OS_OK; |
aoqi@0 | 2979 | pthread_t thr = thread->osthread()->pthread_id(); |
aoqi@0 | 2980 | int policy = SCHED_OTHER; |
aoqi@0 | 2981 | struct sched_param param; |
aoqi@0 | 2982 | param.sched_priority = newpri; |
aoqi@0 | 2983 | int ret = pthread_setschedparam(thr, policy, ¶m); |
aoqi@0 | 2984 | |
goetz@7424 | 2985 | if (ret != 0) { |
goetz@7424 | 2986 | trcVerbose("Could not change priority for thread %d to %d (error %d, %s)", |
goetz@7424 | 2987 | (int)thr, newpri, ret, strerror(ret)); |
aoqi@0 | 2988 | } |
aoqi@0 | 2989 | return (ret == 0) ? OS_OK : OS_ERR; |
aoqi@0 | 2990 | } |
aoqi@0 | 2991 | |
aoqi@0 | 2992 | OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { |
aoqi@0 | 2993 | if (!UseThreadPriorities) { |
aoqi@0 | 2994 | *priority_ptr = java_to_os_priority[NormPriority]; |
aoqi@0 | 2995 | return OS_OK; |
aoqi@0 | 2996 | } |
aoqi@0 | 2997 | pthread_t thr = thread->osthread()->pthread_id(); |
aoqi@0 | 2998 | int policy = SCHED_OTHER; |
aoqi@0 | 2999 | struct sched_param param; |
aoqi@0 | 3000 | int ret = pthread_getschedparam(thr, &policy, ¶m); |
aoqi@0 | 3001 | *priority_ptr = param.sched_priority; |
aoqi@0 | 3002 | |
aoqi@0 | 3003 | return (ret == 0) ? OS_OK : OS_ERR; |
aoqi@0 | 3004 | } |
aoqi@0 | 3005 | |
aoqi@0 | 3006 | // Hint to the underlying OS that a task switch would not be good. |
aoqi@0 | 3007 | // Void return because it's a hint and can fail. |
aoqi@0 | 3008 | void os::hint_no_preempt() {} |
aoqi@0 | 3009 | |
aoqi@0 | 3010 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 3011 | // suspend/resume support |
aoqi@0 | 3012 | |
aoqi@0 | 3013 | // the low-level signal-based suspend/resume support is a remnant from the |
aoqi@0 | 3014 | // old VM-suspension that used to be for java-suspension, safepoints etc, |
aoqi@0 | 3015 | // within hotspot. Now there is a single use-case for this: |
aoqi@0 | 3016 | // - calling get_thread_pc() on the VMThread by the flat-profiler task |
aoqi@0 | 3017 | // that runs in the watcher thread. |
aoqi@0 | 3018 | // The remaining code is greatly simplified from the more general suspension |
aoqi@0 | 3019 | // code that used to be used. |
aoqi@0 | 3020 | // |
aoqi@0 | 3021 | // The protocol is quite simple: |
aoqi@0 | 3022 | // - suspend: |
aoqi@0 | 3023 | // - sends a signal to the target thread |
aoqi@0 | 3024 | // - polls the suspend state of the osthread using a yield loop |
aoqi@0 | 3025 | // - target thread signal handler (SR_handler) sets suspend state |
aoqi@0 | 3026 | // and blocks in sigsuspend until continued |
aoqi@0 | 3027 | // - resume: |
aoqi@0 | 3028 | // - sets target osthread state to continue |
aoqi@0 | 3029 | // - sends signal to end the sigsuspend loop in the SR_handler |
aoqi@0 | 3030 | // |
aoqi@0 | 3031 | // Note that the SR_lock plays no role in this suspend/resume protocol. |
aoqi@0 | 3032 | // |
aoqi@0 | 3033 | |
aoqi@0 | 3034 | static void resume_clear_context(OSThread *osthread) { |
aoqi@0 | 3035 | osthread->set_ucontext(NULL); |
aoqi@0 | 3036 | osthread->set_siginfo(NULL); |
aoqi@0 | 3037 | } |
aoqi@0 | 3038 | |
aoqi@0 | 3039 | static void suspend_save_context(OSThread *osthread, siginfo_t* siginfo, ucontext_t* context) { |
aoqi@0 | 3040 | osthread->set_ucontext(context); |
aoqi@0 | 3041 | osthread->set_siginfo(siginfo); |
aoqi@0 | 3042 | } |
aoqi@0 | 3043 | |
aoqi@0 | 3044 | // |
aoqi@0 | 3045 | // Handler function invoked when a thread's execution is suspended or |
aoqi@0 | 3046 | // resumed. We have to be careful that only async-safe functions are |
aoqi@0 | 3047 | // called here (Note: most pthread functions are not async safe and |
aoqi@0 | 3048 | // should be avoided.) |
aoqi@0 | 3049 | // |
aoqi@0 | 3050 | // Note: sigwait() is a more natural fit than sigsuspend() from an |
aoqi@0 | 3051 | // interface point of view, but sigwait() prevents the signal hander |
aoqi@0 | 3052 | // from being run. libpthread would get very confused by not having |
aoqi@0 | 3053 | // its signal handlers run and prevents sigwait()'s use with the |
aoqi@0 | 3054 | // mutex granting granting signal. |
aoqi@0 | 3055 | // |
aoqi@0 | 3056 | // Currently only ever called on the VMThread and JavaThreads (PC sampling). |
aoqi@0 | 3057 | // |
aoqi@0 | 3058 | static void SR_handler(int sig, siginfo_t* siginfo, ucontext_t* context) { |
aoqi@0 | 3059 | // Save and restore errno to avoid confusing native code with EINTR |
aoqi@0 | 3060 | // after sigsuspend. |
aoqi@0 | 3061 | int old_errno = errno; |
aoqi@0 | 3062 | |
aoqi@0 | 3063 | Thread* thread = Thread::current(); |
aoqi@0 | 3064 | OSThread* osthread = thread->osthread(); |
aoqi@0 | 3065 | assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread"); |
aoqi@0 | 3066 | |
aoqi@0 | 3067 | os::SuspendResume::State current = osthread->sr.state(); |
aoqi@0 | 3068 | if (current == os::SuspendResume::SR_SUSPEND_REQUEST) { |
aoqi@0 | 3069 | suspend_save_context(osthread, siginfo, context); |
aoqi@0 | 3070 | |
aoqi@0 | 3071 | // attempt to switch the state, we assume we had a SUSPEND_REQUEST |
aoqi@0 | 3072 | os::SuspendResume::State state = osthread->sr.suspended(); |
aoqi@0 | 3073 | if (state == os::SuspendResume::SR_SUSPENDED) { |
aoqi@0 | 3074 | sigset_t suspend_set; // signals for sigsuspend() |
aoqi@0 | 3075 | |
aoqi@0 | 3076 | // get current set of blocked signals and unblock resume signal |
aoqi@0 | 3077 | pthread_sigmask(SIG_BLOCK, NULL, &suspend_set); |
aoqi@0 | 3078 | sigdelset(&suspend_set, SR_signum); |
aoqi@0 | 3079 | |
aoqi@0 | 3080 | // wait here until we are resumed |
aoqi@0 | 3081 | while (1) { |
aoqi@0 | 3082 | sigsuspend(&suspend_set); |
aoqi@0 | 3083 | |
aoqi@0 | 3084 | os::SuspendResume::State result = osthread->sr.running(); |
aoqi@0 | 3085 | if (result == os::SuspendResume::SR_RUNNING) { |
aoqi@0 | 3086 | break; |
aoqi@0 | 3087 | } |
aoqi@0 | 3088 | } |
aoqi@0 | 3089 | |
aoqi@0 | 3090 | } else if (state == os::SuspendResume::SR_RUNNING) { |
aoqi@0 | 3091 | // request was cancelled, continue |
aoqi@0 | 3092 | } else { |
aoqi@0 | 3093 | ShouldNotReachHere(); |
aoqi@0 | 3094 | } |
aoqi@0 | 3095 | |
aoqi@0 | 3096 | resume_clear_context(osthread); |
aoqi@0 | 3097 | } else if (current == os::SuspendResume::SR_RUNNING) { |
aoqi@0 | 3098 | // request was cancelled, continue |
aoqi@0 | 3099 | } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) { |
aoqi@0 | 3100 | // ignore |
aoqi@0 | 3101 | } else { |
aoqi@0 | 3102 | ShouldNotReachHere(); |
aoqi@0 | 3103 | } |
aoqi@0 | 3104 | |
aoqi@0 | 3105 | errno = old_errno; |
aoqi@0 | 3106 | } |
aoqi@0 | 3107 | |
aoqi@0 | 3108 | static int SR_initialize() { |
aoqi@0 | 3109 | struct sigaction act; |
aoqi@0 | 3110 | char *s; |
aoqi@0 | 3111 | // Get signal number to use for suspend/resume |
aoqi@0 | 3112 | if ((s = ::getenv("_JAVA_SR_SIGNUM")) != 0) { |
aoqi@0 | 3113 | int sig = ::strtol(s, 0, 10); |
aoqi@0 | 3114 | if (sig > 0 || sig < NSIG) { |
aoqi@0 | 3115 | SR_signum = sig; |
aoqi@0 | 3116 | } |
aoqi@0 | 3117 | } |
aoqi@0 | 3118 | |
aoqi@0 | 3119 | assert(SR_signum > SIGSEGV && SR_signum > SIGBUS, |
aoqi@0 | 3120 | "SR_signum must be greater than max(SIGSEGV, SIGBUS), see 4355769"); |
aoqi@0 | 3121 | |
aoqi@0 | 3122 | sigemptyset(&SR_sigset); |
aoqi@0 | 3123 | sigaddset(&SR_sigset, SR_signum); |
aoqi@0 | 3124 | |
aoqi@0 | 3125 | // Set up signal handler for suspend/resume. |
aoqi@0 | 3126 | act.sa_flags = SA_RESTART|SA_SIGINFO; |
aoqi@0 | 3127 | act.sa_handler = (void (*)(int)) SR_handler; |
aoqi@0 | 3128 | |
aoqi@0 | 3129 | // SR_signum is blocked by default. |
aoqi@0 | 3130 | // 4528190 - We also need to block pthread restart signal (32 on all |
aoqi@0 | 3131 | // supported Linux platforms). Note that LinuxThreads need to block |
aoqi@0 | 3132 | // this signal for all threads to work properly. So we don't have |
aoqi@0 | 3133 | // to use hard-coded signal number when setting up the mask. |
aoqi@0 | 3134 | pthread_sigmask(SIG_BLOCK, NULL, &act.sa_mask); |
aoqi@0 | 3135 | |
aoqi@0 | 3136 | if (sigaction(SR_signum, &act, 0) == -1) { |
aoqi@0 | 3137 | return -1; |
aoqi@0 | 3138 | } |
aoqi@0 | 3139 | |
aoqi@0 | 3140 | // Save signal flag |
aoqi@0 | 3141 | os::Aix::set_our_sigflags(SR_signum, act.sa_flags); |
aoqi@0 | 3142 | return 0; |
aoqi@0 | 3143 | } |
aoqi@0 | 3144 | |
aoqi@0 | 3145 | static int SR_finalize() { |
aoqi@0 | 3146 | return 0; |
aoqi@0 | 3147 | } |
aoqi@0 | 3148 | |
aoqi@0 | 3149 | static int sr_notify(OSThread* osthread) { |
aoqi@0 | 3150 | int status = pthread_kill(osthread->pthread_id(), SR_signum); |
aoqi@0 | 3151 | assert_status(status == 0, status, "pthread_kill"); |
aoqi@0 | 3152 | return status; |
aoqi@0 | 3153 | } |
aoqi@0 | 3154 | |
aoqi@0 | 3155 | // "Randomly" selected value for how long we want to spin |
aoqi@0 | 3156 | // before bailing out on suspending a thread, also how often |
aoqi@0 | 3157 | // we send a signal to a thread we want to resume |
aoqi@0 | 3158 | static const int RANDOMLY_LARGE_INTEGER = 1000000; |
aoqi@0 | 3159 | static const int RANDOMLY_LARGE_INTEGER2 = 100; |
aoqi@0 | 3160 | |
aoqi@0 | 3161 | // returns true on success and false on error - really an error is fatal |
aoqi@0 | 3162 | // but this seems the normal response to library errors |
aoqi@0 | 3163 | static bool do_suspend(OSThread* osthread) { |
aoqi@0 | 3164 | assert(osthread->sr.is_running(), "thread should be running"); |
aoqi@0 | 3165 | // mark as suspended and send signal |
aoqi@0 | 3166 | |
aoqi@0 | 3167 | if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) { |
aoqi@0 | 3168 | // failed to switch, state wasn't running? |
aoqi@0 | 3169 | ShouldNotReachHere(); |
aoqi@0 | 3170 | return false; |
aoqi@0 | 3171 | } |
aoqi@0 | 3172 | |
aoqi@0 | 3173 | if (sr_notify(osthread) != 0) { |
aoqi@0 | 3174 | // try to cancel, switch to running |
aoqi@0 | 3175 | |
aoqi@0 | 3176 | os::SuspendResume::State result = osthread->sr.cancel_suspend(); |
aoqi@0 | 3177 | if (result == os::SuspendResume::SR_RUNNING) { |
aoqi@0 | 3178 | // cancelled |
aoqi@0 | 3179 | return false; |
aoqi@0 | 3180 | } else if (result == os::SuspendResume::SR_SUSPENDED) { |
aoqi@0 | 3181 | // somehow managed to suspend |
aoqi@0 | 3182 | return true; |
aoqi@0 | 3183 | } else { |
aoqi@0 | 3184 | ShouldNotReachHere(); |
aoqi@0 | 3185 | return false; |
aoqi@0 | 3186 | } |
aoqi@0 | 3187 | } |
aoqi@0 | 3188 | |
aoqi@0 | 3189 | // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED |
aoqi@0 | 3190 | |
aoqi@0 | 3191 | for (int n = 0; !osthread->sr.is_suspended(); n++) { |
aoqi@0 | 3192 | for (int i = 0; i < RANDOMLY_LARGE_INTEGER2 && !osthread->sr.is_suspended(); i++) { |
aoqi@0 | 3193 | os::yield_all(i); |
aoqi@0 | 3194 | } |
aoqi@0 | 3195 | |
aoqi@0 | 3196 | // timeout, try to cancel the request |
aoqi@0 | 3197 | if (n >= RANDOMLY_LARGE_INTEGER) { |
aoqi@0 | 3198 | os::SuspendResume::State cancelled = osthread->sr.cancel_suspend(); |
aoqi@0 | 3199 | if (cancelled == os::SuspendResume::SR_RUNNING) { |
aoqi@0 | 3200 | return false; |
aoqi@0 | 3201 | } else if (cancelled == os::SuspendResume::SR_SUSPENDED) { |
aoqi@0 | 3202 | return true; |
aoqi@0 | 3203 | } else { |
aoqi@0 | 3204 | ShouldNotReachHere(); |
aoqi@0 | 3205 | return false; |
aoqi@0 | 3206 | } |
aoqi@0 | 3207 | } |
aoqi@0 | 3208 | } |
aoqi@0 | 3209 | |
aoqi@0 | 3210 | guarantee(osthread->sr.is_suspended(), "Must be suspended"); |
aoqi@0 | 3211 | return true; |
aoqi@0 | 3212 | } |
aoqi@0 | 3213 | |
aoqi@0 | 3214 | static void do_resume(OSThread* osthread) { |
aoqi@0 | 3215 | //assert(osthread->sr.is_suspended(), "thread should be suspended"); |
aoqi@0 | 3216 | |
aoqi@0 | 3217 | if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) { |
aoqi@0 | 3218 | // failed to switch to WAKEUP_REQUEST |
aoqi@0 | 3219 | ShouldNotReachHere(); |
aoqi@0 | 3220 | return; |
aoqi@0 | 3221 | } |
aoqi@0 | 3222 | |
aoqi@0 | 3223 | while (!osthread->sr.is_running()) { |
aoqi@0 | 3224 | if (sr_notify(osthread) == 0) { |
aoqi@0 | 3225 | for (int n = 0; n < RANDOMLY_LARGE_INTEGER && !osthread->sr.is_running(); n++) { |
aoqi@0 | 3226 | for (int i = 0; i < 100 && !osthread->sr.is_running(); i++) { |
aoqi@0 | 3227 | os::yield_all(i); |
aoqi@0 | 3228 | } |
aoqi@0 | 3229 | } |
aoqi@0 | 3230 | } else { |
aoqi@0 | 3231 | ShouldNotReachHere(); |
aoqi@0 | 3232 | } |
aoqi@0 | 3233 | } |
aoqi@0 | 3234 | |
aoqi@0 | 3235 | guarantee(osthread->sr.is_running(), "Must be running!"); |
aoqi@0 | 3236 | } |
aoqi@0 | 3237 | |
aoqi@0 | 3238 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 3239 | // interrupt support |
aoqi@0 | 3240 | |
aoqi@0 | 3241 | void os::interrupt(Thread* thread) { |
aoqi@0 | 3242 | assert(Thread::current() == thread || Threads_lock->owned_by_self(), |
aoqi@0 | 3243 | "possibility of dangling Thread pointer"); |
aoqi@0 | 3244 | |
aoqi@0 | 3245 | OSThread* osthread = thread->osthread(); |
aoqi@0 | 3246 | |
aoqi@0 | 3247 | if (!osthread->interrupted()) { |
aoqi@0 | 3248 | osthread->set_interrupted(true); |
aoqi@0 | 3249 | // More than one thread can get here with the same value of osthread, |
aoqi@0 | 3250 | // resulting in multiple notifications. We do, however, want the store |
aoqi@0 | 3251 | // to interrupted() to be visible to other threads before we execute unpark(). |
aoqi@0 | 3252 | OrderAccess::fence(); |
aoqi@0 | 3253 | ParkEvent * const slp = thread->_SleepEvent; |
aoqi@0 | 3254 | if (slp != NULL) slp->unpark(); |
aoqi@0 | 3255 | } |
aoqi@0 | 3256 | |
aoqi@0 | 3257 | // For JSR166. Unpark even if interrupt status already was set |
aoqi@0 | 3258 | if (thread->is_Java_thread()) |
aoqi@0 | 3259 | ((JavaThread*)thread)->parker()->unpark(); |
aoqi@0 | 3260 | |
aoqi@0 | 3261 | ParkEvent * ev = thread->_ParkEvent; |
aoqi@0 | 3262 | if (ev != NULL) ev->unpark(); |
aoqi@0 | 3263 | |
aoqi@0 | 3264 | } |
aoqi@0 | 3265 | |
aoqi@0 | 3266 | bool os::is_interrupted(Thread* thread, bool clear_interrupted) { |
aoqi@0 | 3267 | assert(Thread::current() == thread || Threads_lock->owned_by_self(), |
aoqi@0 | 3268 | "possibility of dangling Thread pointer"); |
aoqi@0 | 3269 | |
aoqi@0 | 3270 | OSThread* osthread = thread->osthread(); |
aoqi@0 | 3271 | |
aoqi@0 | 3272 | bool interrupted = osthread->interrupted(); |
aoqi@0 | 3273 | |
aoqi@0 | 3274 | if (interrupted && clear_interrupted) { |
aoqi@0 | 3275 | osthread->set_interrupted(false); |
aoqi@0 | 3276 | // consider thread->_SleepEvent->reset() ... optional optimization |
aoqi@0 | 3277 | } |
aoqi@0 | 3278 | |
aoqi@0 | 3279 | return interrupted; |
aoqi@0 | 3280 | } |
aoqi@0 | 3281 | |
aoqi@0 | 3282 | /////////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 3283 | // signal handling (except suspend/resume) |
aoqi@0 | 3284 | |
aoqi@0 | 3285 | // This routine may be used by user applications as a "hook" to catch signals. |
aoqi@0 | 3286 | // The user-defined signal handler must pass unrecognized signals to this |
aoqi@0 | 3287 | // routine, and if it returns true (non-zero), then the signal handler must |
aoqi@0 | 3288 | // return immediately. If the flag "abort_if_unrecognized" is true, then this |
aoqi@0 | 3289 | // routine will never retun false (zero), but instead will execute a VM panic |
aoqi@0 | 3290 | // routine kill the process. |
aoqi@0 | 3291 | // |
aoqi@0 | 3292 | // If this routine returns false, it is OK to call it again. This allows |
aoqi@0 | 3293 | // the user-defined signal handler to perform checks either before or after |
aoqi@0 | 3294 | // the VM performs its own checks. Naturally, the user code would be making |
aoqi@0 | 3295 | // a serious error if it tried to handle an exception (such as a null check |
aoqi@0 | 3296 | // or breakpoint) that the VM was generating for its own correct operation. |
aoqi@0 | 3297 | // |
aoqi@0 | 3298 | // This routine may recognize any of the following kinds of signals: |
aoqi@0 | 3299 | // SIGBUS, SIGSEGV, SIGILL, SIGFPE, SIGQUIT, SIGPIPE, SIGXFSZ, SIGUSR1. |
aoqi@0 | 3300 | // It should be consulted by handlers for any of those signals. |
aoqi@0 | 3301 | // |
aoqi@0 | 3302 | // The caller of this routine must pass in the three arguments supplied |
aoqi@0 | 3303 | // to the function referred to in the "sa_sigaction" (not the "sa_handler") |
aoqi@0 | 3304 | // field of the structure passed to sigaction(). This routine assumes that |
aoqi@0 | 3305 | // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. |
aoqi@0 | 3306 | // |
aoqi@0 | 3307 | // Note that the VM will print warnings if it detects conflicting signal |
aoqi@0 | 3308 | // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". |
aoqi@0 | 3309 | // |
aoqi@0 | 3310 | extern "C" JNIEXPORT int |
aoqi@0 | 3311 | JVM_handle_aix_signal(int signo, siginfo_t* siginfo, void* ucontext, int abort_if_unrecognized); |
aoqi@0 | 3312 | |
aoqi@0 | 3313 | // Set thread signal mask (for some reason on AIX sigthreadmask() seems |
aoqi@0 | 3314 | // to be the thing to call; documentation is not terribly clear about whether |
aoqi@0 | 3315 | // pthread_sigmask also works, and if it does, whether it does the same. |
aoqi@0 | 3316 | bool set_thread_signal_mask(int how, const sigset_t* set, sigset_t* oset) { |
aoqi@0 | 3317 | const int rc = ::pthread_sigmask(how, set, oset); |
aoqi@0 | 3318 | // return value semantics differ slightly for error case: |
aoqi@0 | 3319 | // pthread_sigmask returns error number, sigthreadmask -1 and sets global errno |
aoqi@0 | 3320 | // (so, pthread_sigmask is more theadsafe for error handling) |
aoqi@0 | 3321 | // But success is always 0. |
aoqi@0 | 3322 | return rc == 0 ? true : false; |
aoqi@0 | 3323 | } |
aoqi@0 | 3324 | |
aoqi@0 | 3325 | // Function to unblock all signals which are, according |
aoqi@0 | 3326 | // to POSIX, typical program error signals. If they happen while being blocked, |
aoqi@0 | 3327 | // they typically will bring down the process immediately. |
aoqi@0 | 3328 | bool unblock_program_error_signals() { |
aoqi@0 | 3329 | sigset_t set; |
aoqi@0 | 3330 | ::sigemptyset(&set); |
aoqi@0 | 3331 | ::sigaddset(&set, SIGILL); |
aoqi@0 | 3332 | ::sigaddset(&set, SIGBUS); |
aoqi@0 | 3333 | ::sigaddset(&set, SIGFPE); |
aoqi@0 | 3334 | ::sigaddset(&set, SIGSEGV); |
aoqi@0 | 3335 | return set_thread_signal_mask(SIG_UNBLOCK, &set, NULL); |
aoqi@0 | 3336 | } |
aoqi@0 | 3337 | |
aoqi@0 | 3338 | // Renamed from 'signalHandler' to avoid collision with other shared libs. |
aoqi@0 | 3339 | void javaSignalHandler(int sig, siginfo_t* info, void* uc) { |
aoqi@0 | 3340 | assert(info != NULL && uc != NULL, "it must be old kernel"); |
aoqi@0 | 3341 | |
aoqi@0 | 3342 | // Never leave program error signals blocked; |
aoqi@0 | 3343 | // on all our platforms they would bring down the process immediately when |
aoqi@0 | 3344 | // getting raised while being blocked. |
aoqi@0 | 3345 | unblock_program_error_signals(); |
aoqi@0 | 3346 | |
aoqi@0 | 3347 | JVM_handle_aix_signal(sig, info, uc, true); |
aoqi@0 | 3348 | } |
aoqi@0 | 3349 | |
aoqi@0 | 3350 | // This boolean allows users to forward their own non-matching signals |
aoqi@0 | 3351 | // to JVM_handle_aix_signal, harmlessly. |
aoqi@0 | 3352 | bool os::Aix::signal_handlers_are_installed = false; |
aoqi@0 | 3353 | |
aoqi@0 | 3354 | // For signal-chaining |
aoqi@0 | 3355 | struct sigaction os::Aix::sigact[MAXSIGNUM]; |
aoqi@0 | 3356 | unsigned int os::Aix::sigs = 0; |
aoqi@0 | 3357 | bool os::Aix::libjsig_is_loaded = false; |
aoqi@0 | 3358 | typedef struct sigaction *(*get_signal_t)(int); |
aoqi@0 | 3359 | get_signal_t os::Aix::get_signal_action = NULL; |
aoqi@0 | 3360 | |
aoqi@0 | 3361 | struct sigaction* os::Aix::get_chained_signal_action(int sig) { |
aoqi@0 | 3362 | struct sigaction *actp = NULL; |
aoqi@0 | 3363 | |
aoqi@0 | 3364 | if (libjsig_is_loaded) { |
aoqi@0 | 3365 | // Retrieve the old signal handler from libjsig |
aoqi@0 | 3366 | actp = (*get_signal_action)(sig); |
aoqi@0 | 3367 | } |
aoqi@0 | 3368 | if (actp == NULL) { |
aoqi@0 | 3369 | // Retrieve the preinstalled signal handler from jvm |
aoqi@0 | 3370 | actp = get_preinstalled_handler(sig); |
aoqi@0 | 3371 | } |
aoqi@0 | 3372 | |
aoqi@0 | 3373 | return actp; |
aoqi@0 | 3374 | } |
aoqi@0 | 3375 | |
aoqi@0 | 3376 | static bool call_chained_handler(struct sigaction *actp, int sig, |
aoqi@0 | 3377 | siginfo_t *siginfo, void *context) { |
aoqi@0 | 3378 | // Call the old signal handler |
aoqi@0 | 3379 | if (actp->sa_handler == SIG_DFL) { |
aoqi@0 | 3380 | // It's more reasonable to let jvm treat it as an unexpected exception |
aoqi@0 | 3381 | // instead of taking the default action. |
aoqi@0 | 3382 | return false; |
aoqi@0 | 3383 | } else if (actp->sa_handler != SIG_IGN) { |
aoqi@0 | 3384 | if ((actp->sa_flags & SA_NODEFER) == 0) { |
aoqi@0 | 3385 | // automaticlly block the signal |
aoqi@0 | 3386 | sigaddset(&(actp->sa_mask), sig); |
aoqi@0 | 3387 | } |
aoqi@0 | 3388 | |
aoqi@0 | 3389 | sa_handler_t hand = NULL; |
aoqi@0 | 3390 | sa_sigaction_t sa = NULL; |
aoqi@0 | 3391 | bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; |
aoqi@0 | 3392 | // retrieve the chained handler |
aoqi@0 | 3393 | if (siginfo_flag_set) { |
aoqi@0 | 3394 | sa = actp->sa_sigaction; |
aoqi@0 | 3395 | } else { |
aoqi@0 | 3396 | hand = actp->sa_handler; |
aoqi@0 | 3397 | } |
aoqi@0 | 3398 | |
aoqi@0 | 3399 | if ((actp->sa_flags & SA_RESETHAND) != 0) { |
aoqi@0 | 3400 | actp->sa_handler = SIG_DFL; |
aoqi@0 | 3401 | } |
aoqi@0 | 3402 | |
aoqi@0 | 3403 | // try to honor the signal mask |
aoqi@0 | 3404 | sigset_t oset; |
aoqi@0 | 3405 | pthread_sigmask(SIG_SETMASK, &(actp->sa_mask), &oset); |
aoqi@0 | 3406 | |
aoqi@0 | 3407 | // call into the chained handler |
aoqi@0 | 3408 | if (siginfo_flag_set) { |
aoqi@0 | 3409 | (*sa)(sig, siginfo, context); |
aoqi@0 | 3410 | } else { |
aoqi@0 | 3411 | (*hand)(sig); |
aoqi@0 | 3412 | } |
aoqi@0 | 3413 | |
aoqi@0 | 3414 | // restore the signal mask |
aoqi@0 | 3415 | pthread_sigmask(SIG_SETMASK, &oset, 0); |
aoqi@0 | 3416 | } |
aoqi@0 | 3417 | // Tell jvm's signal handler the signal is taken care of. |
aoqi@0 | 3418 | return true; |
aoqi@0 | 3419 | } |
aoqi@0 | 3420 | |
aoqi@0 | 3421 | bool os::Aix::chained_handler(int sig, siginfo_t* siginfo, void* context) { |
aoqi@0 | 3422 | bool chained = false; |
aoqi@0 | 3423 | // signal-chaining |
aoqi@0 | 3424 | if (UseSignalChaining) { |
aoqi@0 | 3425 | struct sigaction *actp = get_chained_signal_action(sig); |
aoqi@0 | 3426 | if (actp != NULL) { |
aoqi@0 | 3427 | chained = call_chained_handler(actp, sig, siginfo, context); |
aoqi@0 | 3428 | } |
aoqi@0 | 3429 | } |
aoqi@0 | 3430 | return chained; |
aoqi@0 | 3431 | } |
aoqi@0 | 3432 | |
aoqi@0 | 3433 | struct sigaction* os::Aix::get_preinstalled_handler(int sig) { |
aoqi@0 | 3434 | if ((((unsigned int)1 << sig) & sigs) != 0) { |
aoqi@0 | 3435 | return &sigact[sig]; |
aoqi@0 | 3436 | } |
aoqi@0 | 3437 | return NULL; |
aoqi@0 | 3438 | } |
aoqi@0 | 3439 | |
aoqi@0 | 3440 | void os::Aix::save_preinstalled_handler(int sig, struct sigaction& oldAct) { |
aoqi@0 | 3441 | assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); |
aoqi@0 | 3442 | sigact[sig] = oldAct; |
aoqi@0 | 3443 | sigs |= (unsigned int)1 << sig; |
aoqi@0 | 3444 | } |
aoqi@0 | 3445 | |
aoqi@0 | 3446 | // for diagnostic |
aoqi@0 | 3447 | int os::Aix::sigflags[MAXSIGNUM]; |
aoqi@0 | 3448 | |
aoqi@0 | 3449 | int os::Aix::get_our_sigflags(int sig) { |
aoqi@0 | 3450 | assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); |
aoqi@0 | 3451 | return sigflags[sig]; |
aoqi@0 | 3452 | } |
aoqi@0 | 3453 | |
aoqi@0 | 3454 | void os::Aix::set_our_sigflags(int sig, int flags) { |
aoqi@0 | 3455 | assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); |
aoqi@0 | 3456 | sigflags[sig] = flags; |
aoqi@0 | 3457 | } |
aoqi@0 | 3458 | |
aoqi@0 | 3459 | void os::Aix::set_signal_handler(int sig, bool set_installed) { |
aoqi@0 | 3460 | // Check for overwrite. |
aoqi@0 | 3461 | struct sigaction oldAct; |
aoqi@0 | 3462 | sigaction(sig, (struct sigaction*)NULL, &oldAct); |
aoqi@0 | 3463 | |
aoqi@0 | 3464 | void* oldhand = oldAct.sa_sigaction |
aoqi@0 | 3465 | ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) |
aoqi@0 | 3466 | : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); |
aoqi@0 | 3467 | // Renamed 'signalHandler' to avoid collision with other shared libs. |
aoqi@0 | 3468 | if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && |
aoqi@0 | 3469 | oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && |
aoqi@0 | 3470 | oldhand != CAST_FROM_FN_PTR(void*, (sa_sigaction_t)javaSignalHandler)) { |
aoqi@0 | 3471 | if (AllowUserSignalHandlers || !set_installed) { |
aoqi@0 | 3472 | // Do not overwrite; user takes responsibility to forward to us. |
aoqi@0 | 3473 | return; |
aoqi@0 | 3474 | } else if (UseSignalChaining) { |
aoqi@0 | 3475 | // save the old handler in jvm |
aoqi@0 | 3476 | save_preinstalled_handler(sig, oldAct); |
aoqi@0 | 3477 | // libjsig also interposes the sigaction() call below and saves the |
aoqi@0 | 3478 | // old sigaction on it own. |
aoqi@0 | 3479 | } else { |
aoqi@0 | 3480 | fatal(err_msg("Encountered unexpected pre-existing sigaction handler " |
aoqi@0 | 3481 | "%#lx for signal %d.", (long)oldhand, sig)); |
aoqi@0 | 3482 | } |
aoqi@0 | 3483 | } |
aoqi@0 | 3484 | |
aoqi@0 | 3485 | struct sigaction sigAct; |
aoqi@0 | 3486 | sigfillset(&(sigAct.sa_mask)); |
aoqi@0 | 3487 | if (!set_installed) { |
aoqi@0 | 3488 | sigAct.sa_handler = SIG_DFL; |
aoqi@0 | 3489 | sigAct.sa_flags = SA_RESTART; |
aoqi@0 | 3490 | } else { |
aoqi@0 | 3491 | // Renamed 'signalHandler' to avoid collision with other shared libs. |
aoqi@0 | 3492 | sigAct.sa_sigaction = javaSignalHandler; |
aoqi@0 | 3493 | sigAct.sa_flags = SA_SIGINFO|SA_RESTART; |
aoqi@0 | 3494 | } |
aoqi@0 | 3495 | // Save flags, which are set by ours |
aoqi@0 | 3496 | assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); |
aoqi@0 | 3497 | sigflags[sig] = sigAct.sa_flags; |
aoqi@0 | 3498 | |
aoqi@0 | 3499 | int ret = sigaction(sig, &sigAct, &oldAct); |
aoqi@0 | 3500 | assert(ret == 0, "check"); |
aoqi@0 | 3501 | |
aoqi@0 | 3502 | void* oldhand2 = oldAct.sa_sigaction |
aoqi@0 | 3503 | ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) |
aoqi@0 | 3504 | : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); |
aoqi@0 | 3505 | assert(oldhand2 == oldhand, "no concurrent signal handler installation"); |
aoqi@0 | 3506 | } |
aoqi@0 | 3507 | |
aoqi@0 | 3508 | // install signal handlers for signals that HotSpot needs to |
aoqi@0 | 3509 | // handle in order to support Java-level exception handling. |
aoqi@0 | 3510 | void os::Aix::install_signal_handlers() { |
aoqi@0 | 3511 | if (!signal_handlers_are_installed) { |
aoqi@0 | 3512 | signal_handlers_are_installed = true; |
aoqi@0 | 3513 | |
aoqi@0 | 3514 | // signal-chaining |
aoqi@0 | 3515 | typedef void (*signal_setting_t)(); |
aoqi@0 | 3516 | signal_setting_t begin_signal_setting = NULL; |
aoqi@0 | 3517 | signal_setting_t end_signal_setting = NULL; |
aoqi@0 | 3518 | begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, |
aoqi@0 | 3519 | dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); |
aoqi@0 | 3520 | if (begin_signal_setting != NULL) { |
aoqi@0 | 3521 | end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, |
aoqi@0 | 3522 | dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); |
aoqi@0 | 3523 | get_signal_action = CAST_TO_FN_PTR(get_signal_t, |
aoqi@0 | 3524 | dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); |
aoqi@0 | 3525 | libjsig_is_loaded = true; |
aoqi@0 | 3526 | assert(UseSignalChaining, "should enable signal-chaining"); |
aoqi@0 | 3527 | } |
aoqi@0 | 3528 | if (libjsig_is_loaded) { |
aoqi@0 | 3529 | // Tell libjsig jvm is setting signal handlers |
aoqi@0 | 3530 | (*begin_signal_setting)(); |
aoqi@0 | 3531 | } |
aoqi@0 | 3532 | |
aoqi@0 | 3533 | set_signal_handler(SIGSEGV, true); |
aoqi@0 | 3534 | set_signal_handler(SIGPIPE, true); |
aoqi@0 | 3535 | set_signal_handler(SIGBUS, true); |
aoqi@0 | 3536 | set_signal_handler(SIGILL, true); |
aoqi@0 | 3537 | set_signal_handler(SIGFPE, true); |
aoqi@0 | 3538 | set_signal_handler(SIGTRAP, true); |
aoqi@0 | 3539 | set_signal_handler(SIGXFSZ, true); |
aoqi@0 | 3540 | set_signal_handler(SIGDANGER, true); |
aoqi@0 | 3541 | |
aoqi@0 | 3542 | if (libjsig_is_loaded) { |
goetz@7424 | 3543 | // Tell libjsig jvm finishes setting signal handlers. |
aoqi@0 | 3544 | (*end_signal_setting)(); |
aoqi@0 | 3545 | } |
aoqi@0 | 3546 | |
aoqi@0 | 3547 | // We don't activate signal checker if libjsig is in place, we trust ourselves |
aoqi@0 | 3548 | // and if UserSignalHandler is installed all bets are off. |
aoqi@0 | 3549 | // Log that signal checking is off only if -verbose:jni is specified. |
aoqi@0 | 3550 | if (CheckJNICalls) { |
aoqi@0 | 3551 | if (libjsig_is_loaded) { |
aoqi@0 | 3552 | tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); |
aoqi@0 | 3553 | check_signals = false; |
aoqi@0 | 3554 | } |
aoqi@0 | 3555 | if (AllowUserSignalHandlers) { |
aoqi@0 | 3556 | tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); |
aoqi@0 | 3557 | check_signals = false; |
aoqi@0 | 3558 | } |
goetz@7424 | 3559 | // Need to initialize check_signal_done. |
aoqi@0 | 3560 | ::sigemptyset(&check_signal_done); |
aoqi@0 | 3561 | } |
aoqi@0 | 3562 | } |
aoqi@0 | 3563 | } |
aoqi@0 | 3564 | |
aoqi@0 | 3565 | static const char* get_signal_handler_name(address handler, |
aoqi@0 | 3566 | char* buf, int buflen) { |
aoqi@0 | 3567 | int offset; |
aoqi@0 | 3568 | bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); |
aoqi@0 | 3569 | if (found) { |
aoqi@0 | 3570 | // skip directory names |
aoqi@0 | 3571 | const char *p1, *p2; |
aoqi@0 | 3572 | p1 = buf; |
aoqi@0 | 3573 | size_t len = strlen(os::file_separator()); |
aoqi@0 | 3574 | while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; |
aoqi@0 | 3575 | // The way os::dll_address_to_library_name is implemented on Aix |
aoqi@0 | 3576 | // right now, it always returns -1 for the offset which is not |
aoqi@0 | 3577 | // terribly informative. |
aoqi@0 | 3578 | // Will fix that. For now, omit the offset. |
aoqi@0 | 3579 | jio_snprintf(buf, buflen, "%s", p1); |
aoqi@0 | 3580 | } else { |
aoqi@0 | 3581 | jio_snprintf(buf, buflen, PTR_FORMAT, handler); |
aoqi@0 | 3582 | } |
aoqi@0 | 3583 | return buf; |
aoqi@0 | 3584 | } |
aoqi@0 | 3585 | |
aoqi@0 | 3586 | static void print_signal_handler(outputStream* st, int sig, |
aoqi@0 | 3587 | char* buf, size_t buflen) { |
aoqi@0 | 3588 | struct sigaction sa; |
aoqi@0 | 3589 | sigaction(sig, NULL, &sa); |
aoqi@0 | 3590 | |
aoqi@0 | 3591 | st->print("%s: ", os::exception_name(sig, buf, buflen)); |
aoqi@0 | 3592 | |
aoqi@0 | 3593 | address handler = (sa.sa_flags & SA_SIGINFO) |
aoqi@0 | 3594 | ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) |
aoqi@0 | 3595 | : CAST_FROM_FN_PTR(address, sa.sa_handler); |
aoqi@0 | 3596 | |
aoqi@0 | 3597 | if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { |
aoqi@0 | 3598 | st->print("SIG_DFL"); |
aoqi@0 | 3599 | } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { |
aoqi@0 | 3600 | st->print("SIG_IGN"); |
aoqi@0 | 3601 | } else { |
aoqi@0 | 3602 | st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); |
aoqi@0 | 3603 | } |
aoqi@0 | 3604 | |
aoqi@0 | 3605 | // Print readable mask. |
aoqi@0 | 3606 | st->print(", sa_mask[0]="); |
aoqi@0 | 3607 | os::Posix::print_signal_set_short(st, &sa.sa_mask); |
aoqi@0 | 3608 | |
aoqi@0 | 3609 | address rh = VMError::get_resetted_sighandler(sig); |
aoqi@0 | 3610 | // May be, handler was resetted by VMError? |
aoqi@0 | 3611 | if (rh != NULL) { |
aoqi@0 | 3612 | handler = rh; |
aoqi@0 | 3613 | sa.sa_flags = VMError::get_resetted_sigflags(sig); |
aoqi@0 | 3614 | } |
aoqi@0 | 3615 | |
aoqi@0 | 3616 | // Print textual representation of sa_flags. |
aoqi@0 | 3617 | st->print(", sa_flags="); |
aoqi@0 | 3618 | os::Posix::print_sa_flags(st, sa.sa_flags); |
aoqi@0 | 3619 | |
aoqi@0 | 3620 | // Check: is it our handler? |
aoqi@0 | 3621 | if (handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)javaSignalHandler) || |
aoqi@0 | 3622 | handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler)) { |
aoqi@0 | 3623 | // It is our signal handler. |
aoqi@0 | 3624 | // Check for flags, reset system-used one! |
aoqi@0 | 3625 | if ((int)sa.sa_flags != os::Aix::get_our_sigflags(sig)) { |
aoqi@0 | 3626 | st->print(", flags was changed from " PTR32_FORMAT ", consider using jsig library", |
aoqi@0 | 3627 | os::Aix::get_our_sigflags(sig)); |
aoqi@0 | 3628 | } |
aoqi@0 | 3629 | } |
aoqi@0 | 3630 | st->cr(); |
aoqi@0 | 3631 | } |
aoqi@0 | 3632 | |
aoqi@0 | 3633 | #define DO_SIGNAL_CHECK(sig) \ |
aoqi@0 | 3634 | if (!sigismember(&check_signal_done, sig)) \ |
aoqi@0 | 3635 | os::Aix::check_signal_handler(sig) |
aoqi@0 | 3636 | |
aoqi@0 | 3637 | // This method is a periodic task to check for misbehaving JNI applications |
aoqi@0 | 3638 | // under CheckJNI, we can add any periodic checks here |
aoqi@0 | 3639 | |
aoqi@0 | 3640 | void os::run_periodic_checks() { |
aoqi@0 | 3641 | |
aoqi@0 | 3642 | if (check_signals == false) return; |
aoqi@0 | 3643 | |
aoqi@0 | 3644 | // SEGV and BUS if overridden could potentially prevent |
aoqi@0 | 3645 | // generation of hs*.log in the event of a crash, debugging |
aoqi@0 | 3646 | // such a case can be very challenging, so we absolutely |
aoqi@0 | 3647 | // check the following for a good measure: |
aoqi@0 | 3648 | DO_SIGNAL_CHECK(SIGSEGV); |
aoqi@0 | 3649 | DO_SIGNAL_CHECK(SIGILL); |
aoqi@0 | 3650 | DO_SIGNAL_CHECK(SIGFPE); |
aoqi@0 | 3651 | DO_SIGNAL_CHECK(SIGBUS); |
aoqi@0 | 3652 | DO_SIGNAL_CHECK(SIGPIPE); |
aoqi@0 | 3653 | DO_SIGNAL_CHECK(SIGXFSZ); |
aoqi@0 | 3654 | if (UseSIGTRAP) { |
aoqi@0 | 3655 | DO_SIGNAL_CHECK(SIGTRAP); |
aoqi@0 | 3656 | } |
aoqi@0 | 3657 | DO_SIGNAL_CHECK(SIGDANGER); |
aoqi@0 | 3658 | |
aoqi@0 | 3659 | // ReduceSignalUsage allows the user to override these handlers |
aoqi@0 | 3660 | // see comments at the very top and jvm_solaris.h |
aoqi@0 | 3661 | if (!ReduceSignalUsage) { |
aoqi@0 | 3662 | DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); |
aoqi@0 | 3663 | DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); |
aoqi@0 | 3664 | DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); |
aoqi@0 | 3665 | DO_SIGNAL_CHECK(BREAK_SIGNAL); |
aoqi@0 | 3666 | } |
aoqi@0 | 3667 | |
aoqi@0 | 3668 | DO_SIGNAL_CHECK(SR_signum); |
aoqi@0 | 3669 | DO_SIGNAL_CHECK(INTERRUPT_SIGNAL); |
aoqi@0 | 3670 | } |
aoqi@0 | 3671 | |
aoqi@0 | 3672 | typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); |
aoqi@0 | 3673 | |
aoqi@0 | 3674 | static os_sigaction_t os_sigaction = NULL; |
aoqi@0 | 3675 | |
aoqi@0 | 3676 | void os::Aix::check_signal_handler(int sig) { |
aoqi@0 | 3677 | char buf[O_BUFLEN]; |
aoqi@0 | 3678 | address jvmHandler = NULL; |
aoqi@0 | 3679 | |
aoqi@0 | 3680 | struct sigaction act; |
aoqi@0 | 3681 | if (os_sigaction == NULL) { |
aoqi@0 | 3682 | // only trust the default sigaction, in case it has been interposed |
aoqi@0 | 3683 | os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); |
aoqi@0 | 3684 | if (os_sigaction == NULL) return; |
aoqi@0 | 3685 | } |
aoqi@0 | 3686 | |
aoqi@0 | 3687 | os_sigaction(sig, (struct sigaction*)NULL, &act); |
aoqi@0 | 3688 | |
aoqi@0 | 3689 | address thisHandler = (act.sa_flags & SA_SIGINFO) |
aoqi@0 | 3690 | ? CAST_FROM_FN_PTR(address, act.sa_sigaction) |
aoqi@0 | 3691 | : CAST_FROM_FN_PTR(address, act.sa_handler); |
aoqi@0 | 3692 | |
aoqi@0 | 3693 | switch(sig) { |
aoqi@0 | 3694 | case SIGSEGV: |
aoqi@0 | 3695 | case SIGBUS: |
aoqi@0 | 3696 | case SIGFPE: |
aoqi@0 | 3697 | case SIGPIPE: |
aoqi@0 | 3698 | case SIGILL: |
aoqi@0 | 3699 | case SIGXFSZ: |
aoqi@0 | 3700 | // Renamed 'signalHandler' to avoid collision with other shared libs. |
aoqi@0 | 3701 | jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)javaSignalHandler); |
aoqi@0 | 3702 | break; |
aoqi@0 | 3703 | |
aoqi@0 | 3704 | case SHUTDOWN1_SIGNAL: |
aoqi@0 | 3705 | case SHUTDOWN2_SIGNAL: |
aoqi@0 | 3706 | case SHUTDOWN3_SIGNAL: |
aoqi@0 | 3707 | case BREAK_SIGNAL: |
aoqi@0 | 3708 | jvmHandler = (address)user_handler(); |
aoqi@0 | 3709 | break; |
aoqi@0 | 3710 | |
aoqi@0 | 3711 | case INTERRUPT_SIGNAL: |
aoqi@0 | 3712 | jvmHandler = CAST_FROM_FN_PTR(address, SIG_DFL); |
aoqi@0 | 3713 | break; |
aoqi@0 | 3714 | |
aoqi@0 | 3715 | default: |
aoqi@0 | 3716 | if (sig == SR_signum) { |
aoqi@0 | 3717 | jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler); |
aoqi@0 | 3718 | } else { |
aoqi@0 | 3719 | return; |
aoqi@0 | 3720 | } |
aoqi@0 | 3721 | break; |
aoqi@0 | 3722 | } |
aoqi@0 | 3723 | |
aoqi@0 | 3724 | if (thisHandler != jvmHandler) { |
aoqi@0 | 3725 | tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); |
aoqi@0 | 3726 | tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); |
aoqi@0 | 3727 | tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); |
aoqi@0 | 3728 | // No need to check this sig any longer |
aoqi@0 | 3729 | sigaddset(&check_signal_done, sig); |
minqi@7824 | 3730 | // Running under non-interactive shell, SHUTDOWN2_SIGNAL will be reassigned SIG_IGN |
minqi@7824 | 3731 | if (sig == SHUTDOWN2_SIGNAL && !isatty(fileno(stdin))) { |
minqi@7824 | 3732 | tty->print_cr("Running in non-interactive shell, %s handler is replaced by shell", |
minqi@7824 | 3733 | exception_name(sig, buf, O_BUFLEN)); |
minqi@7824 | 3734 | } |
aoqi@0 | 3735 | } else if (os::Aix::get_our_sigflags(sig) != 0 && (int)act.sa_flags != os::Aix::get_our_sigflags(sig)) { |
aoqi@0 | 3736 | tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); |
aoqi@0 | 3737 | tty->print("expected:" PTR32_FORMAT, os::Aix::get_our_sigflags(sig)); |
aoqi@0 | 3738 | tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); |
aoqi@0 | 3739 | // No need to check this sig any longer |
aoqi@0 | 3740 | sigaddset(&check_signal_done, sig); |
aoqi@0 | 3741 | } |
aoqi@0 | 3742 | |
aoqi@0 | 3743 | // Dump all the signal |
aoqi@0 | 3744 | if (sigismember(&check_signal_done, sig)) { |
aoqi@0 | 3745 | print_signal_handlers(tty, buf, O_BUFLEN); |
aoqi@0 | 3746 | } |
aoqi@0 | 3747 | } |
aoqi@0 | 3748 | |
aoqi@0 | 3749 | extern bool signal_name(int signo, char* buf, size_t len); |
aoqi@0 | 3750 | |
aoqi@0 | 3751 | const char* os::exception_name(int exception_code, char* buf, size_t size) { |
aoqi@0 | 3752 | if (0 < exception_code && exception_code <= SIGRTMAX) { |
aoqi@0 | 3753 | // signal |
aoqi@0 | 3754 | if (!signal_name(exception_code, buf, size)) { |
aoqi@0 | 3755 | jio_snprintf(buf, size, "SIG%d", exception_code); |
aoqi@0 | 3756 | } |
aoqi@0 | 3757 | return buf; |
aoqi@0 | 3758 | } else { |
aoqi@0 | 3759 | return NULL; |
aoqi@0 | 3760 | } |
aoqi@0 | 3761 | } |
aoqi@0 | 3762 | |
aoqi@0 | 3763 | // To install functions for atexit system call |
aoqi@0 | 3764 | extern "C" { |
aoqi@0 | 3765 | static void perfMemory_exit_helper() { |
aoqi@0 | 3766 | perfMemory_exit(); |
aoqi@0 | 3767 | } |
aoqi@0 | 3768 | } |
aoqi@0 | 3769 | |
aoqi@0 | 3770 | // This is called _before_ the most of global arguments have been parsed. |
aoqi@0 | 3771 | void os::init(void) { |
aoqi@0 | 3772 | // This is basic, we want to know if that ever changes. |
aoqi@0 | 3773 | // (shared memory boundary is supposed to be a 256M aligned) |
aoqi@0 | 3774 | assert(SHMLBA == ((uint64_t)0x10000000ULL)/*256M*/, "unexpected"); |
aoqi@0 | 3775 | |
aoqi@0 | 3776 | // First off, we need to know whether we run on AIX or PASE, and |
aoqi@0 | 3777 | // the OS level we run on. |
aoqi@0 | 3778 | os::Aix::initialize_os_info(); |
aoqi@0 | 3779 | |
aoqi@0 | 3780 | // Scan environment (SPEC1170 behaviour, etc) |
aoqi@0 | 3781 | os::Aix::scan_environment(); |
aoqi@0 | 3782 | |
aoqi@0 | 3783 | // Check which pages are supported by AIX. |
aoqi@0 | 3784 | os::Aix::query_multipage_support(); |
aoqi@0 | 3785 | |
aoqi@0 | 3786 | // Next, we need to initialize libo4 and libperfstat libraries. |
aoqi@0 | 3787 | if (os::Aix::on_pase()) { |
aoqi@0 | 3788 | os::Aix::initialize_libo4(); |
aoqi@0 | 3789 | } else { |
aoqi@0 | 3790 | os::Aix::initialize_libperfstat(); |
aoqi@0 | 3791 | } |
aoqi@0 | 3792 | |
aoqi@0 | 3793 | // Reset the perfstat information provided by ODM. |
aoqi@0 | 3794 | if (os::Aix::on_aix()) { |
aoqi@0 | 3795 | libperfstat::perfstat_reset(); |
aoqi@0 | 3796 | } |
aoqi@0 | 3797 | |
aoqi@0 | 3798 | // Now initialze basic system properties. Note that for some of the values we |
aoqi@0 | 3799 | // need libperfstat etc. |
aoqi@0 | 3800 | os::Aix::initialize_system_info(); |
aoqi@0 | 3801 | |
aoqi@0 | 3802 | // Initialize large page support. |
aoqi@0 | 3803 | if (UseLargePages) { |
aoqi@0 | 3804 | os::large_page_init(); |
aoqi@0 | 3805 | if (!UseLargePages) { |
aoqi@0 | 3806 | // initialize os::_page_sizes |
aoqi@0 | 3807 | _page_sizes[0] = Aix::page_size(); |
aoqi@0 | 3808 | _page_sizes[1] = 0; |
aoqi@0 | 3809 | if (Verbose) { |
aoqi@0 | 3810 | fprintf(stderr, "Large Page initialization failed: setting UseLargePages=0.\n"); |
aoqi@0 | 3811 | } |
aoqi@0 | 3812 | } |
aoqi@0 | 3813 | } else { |
aoqi@0 | 3814 | // initialize os::_page_sizes |
aoqi@0 | 3815 | _page_sizes[0] = Aix::page_size(); |
aoqi@0 | 3816 | _page_sizes[1] = 0; |
aoqi@0 | 3817 | } |
aoqi@0 | 3818 | |
aoqi@0 | 3819 | // debug trace |
aoqi@0 | 3820 | if (Verbose) { |
aoqi@0 | 3821 | fprintf(stderr, "os::vm_page_size 0x%llX\n", os::vm_page_size()); |
aoqi@0 | 3822 | fprintf(stderr, "os::large_page_size 0x%llX\n", os::large_page_size()); |
aoqi@0 | 3823 | fprintf(stderr, "os::_page_sizes = ( "); |
aoqi@0 | 3824 | for (int i = 0; _page_sizes[i]; i ++) { |
aoqi@0 | 3825 | fprintf(stderr, " %s ", describe_pagesize(_page_sizes[i])); |
aoqi@0 | 3826 | } |
aoqi@0 | 3827 | fprintf(stderr, ")\n"); |
aoqi@0 | 3828 | } |
aoqi@0 | 3829 | |
aoqi@0 | 3830 | _initial_pid = getpid(); |
aoqi@0 | 3831 | |
aoqi@0 | 3832 | clock_tics_per_sec = sysconf(_SC_CLK_TCK); |
aoqi@0 | 3833 | |
aoqi@0 | 3834 | init_random(1234567); |
aoqi@0 | 3835 | |
aoqi@0 | 3836 | ThreadCritical::initialize(); |
aoqi@0 | 3837 | |
dbuck@9289 | 3838 | // _main_thread points to the thread that created/loaded the JVM. |
aoqi@0 | 3839 | Aix::_main_thread = pthread_self(); |
aoqi@0 | 3840 | |
aoqi@0 | 3841 | initial_time_count = os::elapsed_counter(); |
aoqi@0 | 3842 | pthread_mutex_init(&dl_mutex, NULL); |
aoqi@0 | 3843 | } |
aoqi@0 | 3844 | |
goetz@7424 | 3845 | // This is called _after_ the global arguments have been parsed. |
aoqi@0 | 3846 | jint os::init_2(void) { |
aoqi@0 | 3847 | |
goetz@7424 | 3848 | trcVerbose("processor count: %d", os::_processor_count); |
goetz@7424 | 3849 | trcVerbose("physical memory: %lu", Aix::_physical_memory); |
goetz@7424 | 3850 | |
goetz@7424 | 3851 | // Initially build up the loaded dll map. |
aoqi@0 | 3852 | LoadedLibraries::reload(); |
aoqi@0 | 3853 | |
aoqi@0 | 3854 | const int page_size = Aix::page_size(); |
aoqi@0 | 3855 | const int map_size = page_size; |
aoqi@0 | 3856 | |
aoqi@0 | 3857 | address map_address = (address) MAP_FAILED; |
aoqi@0 | 3858 | const int prot = PROT_READ; |
aoqi@0 | 3859 | const int flags = MAP_PRIVATE|MAP_ANONYMOUS; |
aoqi@0 | 3860 | |
aoqi@0 | 3861 | // use optimized addresses for the polling page, |
aoqi@0 | 3862 | // e.g. map it to a special 32-bit address. |
aoqi@0 | 3863 | if (OptimizePollingPageLocation) { |
aoqi@0 | 3864 | // architecture-specific list of address wishes: |
aoqi@0 | 3865 | address address_wishes[] = { |
aoqi@0 | 3866 | // AIX: addresses lower than 0x30000000 don't seem to work on AIX. |
aoqi@0 | 3867 | // PPC64: all address wishes are non-negative 32 bit values where |
aoqi@0 | 3868 | // the lower 16 bits are all zero. we can load these addresses |
aoqi@0 | 3869 | // with a single ppc_lis instruction. |
aoqi@0 | 3870 | (address) 0x30000000, (address) 0x31000000, |
aoqi@0 | 3871 | (address) 0x32000000, (address) 0x33000000, |
aoqi@0 | 3872 | (address) 0x40000000, (address) 0x41000000, |
aoqi@0 | 3873 | (address) 0x42000000, (address) 0x43000000, |
aoqi@0 | 3874 | (address) 0x50000000, (address) 0x51000000, |
aoqi@0 | 3875 | (address) 0x52000000, (address) 0x53000000, |
aoqi@0 | 3876 | (address) 0x60000000, (address) 0x61000000, |
aoqi@0 | 3877 | (address) 0x62000000, (address) 0x63000000 |
aoqi@0 | 3878 | }; |
aoqi@0 | 3879 | int address_wishes_length = sizeof(address_wishes)/sizeof(address); |
aoqi@0 | 3880 | |
aoqi@0 | 3881 | // iterate over the list of address wishes: |
aoqi@0 | 3882 | for (int i=0; i<address_wishes_length; i++) { |
aoqi@0 | 3883 | // try to map with current address wish. |
aoqi@0 | 3884 | // AIX: AIX needs MAP_FIXED if we provide an address and mmap will |
aoqi@0 | 3885 | // fail if the address is already mapped. |
aoqi@0 | 3886 | map_address = (address) ::mmap(address_wishes[i] - (ssize_t)page_size, |
aoqi@0 | 3887 | map_size, prot, |
aoqi@0 | 3888 | flags | MAP_FIXED, |
aoqi@0 | 3889 | -1, 0); |
aoqi@0 | 3890 | if (Verbose) { |
aoqi@0 | 3891 | fprintf(stderr, "SafePoint Polling Page address: %p (wish) => %p\n", |
aoqi@0 | 3892 | address_wishes[i], map_address + (ssize_t)page_size); |
aoqi@0 | 3893 | } |
aoqi@0 | 3894 | |
aoqi@0 | 3895 | if (map_address + (ssize_t)page_size == address_wishes[i]) { |
aoqi@0 | 3896 | // map succeeded and map_address is at wished address, exit loop. |
aoqi@0 | 3897 | break; |
aoqi@0 | 3898 | } |
aoqi@0 | 3899 | |
aoqi@0 | 3900 | if (map_address != (address) MAP_FAILED) { |
goetz@7424 | 3901 | // Map succeeded, but polling_page is not at wished address, unmap and continue. |
aoqi@0 | 3902 | ::munmap(map_address, map_size); |
aoqi@0 | 3903 | map_address = (address) MAP_FAILED; |
aoqi@0 | 3904 | } |
aoqi@0 | 3905 | // map failed, continue loop. |
aoqi@0 | 3906 | } |
aoqi@0 | 3907 | } // end OptimizePollingPageLocation |
aoqi@0 | 3908 | |
aoqi@0 | 3909 | if (map_address == (address) MAP_FAILED) { |
aoqi@0 | 3910 | map_address = (address) ::mmap(NULL, map_size, prot, flags, -1, 0); |
aoqi@0 | 3911 | } |
aoqi@0 | 3912 | guarantee(map_address != MAP_FAILED, "os::init_2: failed to allocate polling page"); |
aoqi@0 | 3913 | os::set_polling_page(map_address); |
aoqi@0 | 3914 | |
aoqi@0 | 3915 | if (!UseMembar) { |
aoqi@0 | 3916 | address mem_serialize_page = (address) ::mmap(NULL, Aix::page_size(), PROT_READ | PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); |
aoqi@0 | 3917 | guarantee(mem_serialize_page != NULL, "mmap Failed for memory serialize page"); |
aoqi@0 | 3918 | os::set_memory_serialize_page(mem_serialize_page); |
aoqi@0 | 3919 | |
aoqi@0 | 3920 | #ifndef PRODUCT |
aoqi@0 | 3921 | if (Verbose && PrintMiscellaneous) |
aoqi@0 | 3922 | tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); |
aoqi@0 | 3923 | #endif |
aoqi@0 | 3924 | } |
aoqi@0 | 3925 | |
aoqi@0 | 3926 | // initialize suspend/resume support - must do this before signal_sets_init() |
aoqi@0 | 3927 | if (SR_initialize() != 0) { |
aoqi@0 | 3928 | perror("SR_initialize failed"); |
aoqi@0 | 3929 | return JNI_ERR; |
aoqi@0 | 3930 | } |
aoqi@0 | 3931 | |
aoqi@0 | 3932 | Aix::signal_sets_init(); |
aoqi@0 | 3933 | Aix::install_signal_handlers(); |
aoqi@0 | 3934 | |
aoqi@0 | 3935 | // Check minimum allowable stack size for thread creation and to initialize |
aoqi@0 | 3936 | // the java system classes, including StackOverflowError - depends on page |
aoqi@0 | 3937 | // size. Add a page for compiler2 recursion in main thread. |
aoqi@0 | 3938 | // Add in 2*BytesPerWord times page size to account for VM stack during |
aoqi@0 | 3939 | // class initialization depending on 32 or 64 bit VM. |
aoqi@0 | 3940 | os::Aix::min_stack_allowed = MAX2(os::Aix::min_stack_allowed, |
aoqi@0 | 3941 | (size_t)(StackYellowPages+StackRedPages+StackShadowPages + |
aoqi@0 | 3942 | 2*BytesPerWord COMPILER2_PRESENT(+1)) * Aix::page_size()); |
aoqi@0 | 3943 | |
aoqi@0 | 3944 | size_t threadStackSizeInBytes = ThreadStackSize * K; |
aoqi@0 | 3945 | if (threadStackSizeInBytes != 0 && |
aoqi@0 | 3946 | threadStackSizeInBytes < os::Aix::min_stack_allowed) { |
aoqi@0 | 3947 | tty->print_cr("\nThe stack size specified is too small, " |
aoqi@0 | 3948 | "Specify at least %dk", |
aoqi@0 | 3949 | os::Aix::min_stack_allowed / K); |
aoqi@0 | 3950 | return JNI_ERR; |
aoqi@0 | 3951 | } |
aoqi@0 | 3952 | |
aoqi@0 | 3953 | // Make the stack size a multiple of the page size so that |
aoqi@0 | 3954 | // the yellow/red zones can be guarded. |
goetz@7424 | 3955 | // Note that this can be 0, if no default stacksize was set. |
aoqi@0 | 3956 | JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, vm_page_size())); |
aoqi@0 | 3957 | |
aoqi@0 | 3958 | Aix::libpthread_init(); |
aoqi@0 | 3959 | |
aoqi@0 | 3960 | if (MaxFDLimit) { |
aoqi@0 | 3961 | // set the number of file descriptors to max. print out error |
aoqi@0 | 3962 | // if getrlimit/setrlimit fails but continue regardless. |
aoqi@0 | 3963 | struct rlimit nbr_files; |
aoqi@0 | 3964 | int status = getrlimit(RLIMIT_NOFILE, &nbr_files); |
aoqi@0 | 3965 | if (status != 0) { |
aoqi@0 | 3966 | if (PrintMiscellaneous && (Verbose || WizardMode)) |
aoqi@0 | 3967 | perror("os::init_2 getrlimit failed"); |
aoqi@0 | 3968 | } else { |
aoqi@0 | 3969 | nbr_files.rlim_cur = nbr_files.rlim_max; |
aoqi@0 | 3970 | status = setrlimit(RLIMIT_NOFILE, &nbr_files); |
aoqi@0 | 3971 | if (status != 0) { |
aoqi@0 | 3972 | if (PrintMiscellaneous && (Verbose || WizardMode)) |
aoqi@0 | 3973 | perror("os::init_2 setrlimit failed"); |
aoqi@0 | 3974 | } |
aoqi@0 | 3975 | } |
aoqi@0 | 3976 | } |
aoqi@0 | 3977 | |
aoqi@0 | 3978 | if (PerfAllowAtExitRegistration) { |
aoqi@0 | 3979 | // only register atexit functions if PerfAllowAtExitRegistration is set. |
aoqi@0 | 3980 | // atexit functions can be delayed until process exit time, which |
aoqi@0 | 3981 | // can be problematic for embedded VM situations. Embedded VMs should |
aoqi@0 | 3982 | // call DestroyJavaVM() to assure that VM resources are released. |
aoqi@0 | 3983 | |
aoqi@0 | 3984 | // note: perfMemory_exit_helper atexit function may be removed in |
aoqi@0 | 3985 | // the future if the appropriate cleanup code can be added to the |
aoqi@0 | 3986 | // VM_Exit VMOperation's doit method. |
aoqi@0 | 3987 | if (atexit(perfMemory_exit_helper) != 0) { |
aoqi@0 | 3988 | warning("os::init_2 atexit(perfMemory_exit_helper) failed"); |
aoqi@0 | 3989 | } |
aoqi@0 | 3990 | } |
aoqi@0 | 3991 | |
aoqi@0 | 3992 | return JNI_OK; |
aoqi@0 | 3993 | } |
aoqi@0 | 3994 | |
aoqi@0 | 3995 | // Mark the polling page as unreadable |
aoqi@0 | 3996 | void os::make_polling_page_unreadable(void) { |
aoqi@0 | 3997 | if (!guard_memory((char*)_polling_page, Aix::page_size())) { |
aoqi@0 | 3998 | fatal("Could not disable polling page"); |
aoqi@0 | 3999 | } |
aoqi@0 | 4000 | }; |
aoqi@0 | 4001 | |
aoqi@0 | 4002 | // Mark the polling page as readable |
aoqi@0 | 4003 | void os::make_polling_page_readable(void) { |
aoqi@0 | 4004 | // Changed according to os_linux.cpp. |
aoqi@0 | 4005 | if (!checked_mprotect((char *)_polling_page, Aix::page_size(), PROT_READ)) { |
aoqi@0 | 4006 | fatal(err_msg("Could not enable polling page at " PTR_FORMAT, _polling_page)); |
aoqi@0 | 4007 | } |
aoqi@0 | 4008 | }; |
aoqi@0 | 4009 | |
aoqi@0 | 4010 | int os::active_processor_count() { |
poonam@9413 | 4011 | // User has overridden the number of active processors |
poonam@9413 | 4012 | if (ActiveProcessorCount > 0) { |
poonam@9413 | 4013 | if (PrintActiveCpus) { |
poonam@9413 | 4014 | tty->print_cr("active_processor_count: " |
poonam@9413 | 4015 | "active processor count set by user : %d", |
poonam@9413 | 4016 | ActiveProcessorCount); |
poonam@9413 | 4017 | } |
poonam@9413 | 4018 | return ActiveProcessorCount; |
poonam@9413 | 4019 | } |
poonam@9413 | 4020 | |
aoqi@0 | 4021 | int online_cpus = ::sysconf(_SC_NPROCESSORS_ONLN); |
aoqi@0 | 4022 | assert(online_cpus > 0 && online_cpus <= processor_count(), "sanity check"); |
aoqi@0 | 4023 | return online_cpus; |
aoqi@0 | 4024 | } |
aoqi@0 | 4025 | |
aoqi@0 | 4026 | void os::set_native_thread_name(const char *name) { |
aoqi@0 | 4027 | // Not yet implemented. |
aoqi@0 | 4028 | return; |
aoqi@0 | 4029 | } |
aoqi@0 | 4030 | |
aoqi@0 | 4031 | bool os::distribute_processes(uint length, uint* distribution) { |
aoqi@0 | 4032 | // Not yet implemented. |
aoqi@0 | 4033 | return false; |
aoqi@0 | 4034 | } |
aoqi@0 | 4035 | |
aoqi@0 | 4036 | bool os::bind_to_processor(uint processor_id) { |
aoqi@0 | 4037 | // Not yet implemented. |
aoqi@0 | 4038 | return false; |
aoqi@0 | 4039 | } |
aoqi@0 | 4040 | |
aoqi@0 | 4041 | void os::SuspendedThreadTask::internal_do_task() { |
aoqi@0 | 4042 | if (do_suspend(_thread->osthread())) { |
aoqi@0 | 4043 | SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext()); |
aoqi@0 | 4044 | do_task(context); |
aoqi@0 | 4045 | do_resume(_thread->osthread()); |
aoqi@0 | 4046 | } |
aoqi@0 | 4047 | } |
aoqi@0 | 4048 | |
aoqi@0 | 4049 | class PcFetcher : public os::SuspendedThreadTask { |
aoqi@0 | 4050 | public: |
aoqi@0 | 4051 | PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {} |
aoqi@0 | 4052 | ExtendedPC result(); |
aoqi@0 | 4053 | protected: |
aoqi@0 | 4054 | void do_task(const os::SuspendedThreadTaskContext& context); |
aoqi@0 | 4055 | private: |
aoqi@0 | 4056 | ExtendedPC _epc; |
aoqi@0 | 4057 | }; |
aoqi@0 | 4058 | |
aoqi@0 | 4059 | ExtendedPC PcFetcher::result() { |
aoqi@0 | 4060 | guarantee(is_done(), "task is not done yet."); |
aoqi@0 | 4061 | return _epc; |
aoqi@0 | 4062 | } |
aoqi@0 | 4063 | |
aoqi@0 | 4064 | void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) { |
aoqi@0 | 4065 | Thread* thread = context.thread(); |
aoqi@0 | 4066 | OSThread* osthread = thread->osthread(); |
aoqi@0 | 4067 | if (osthread->ucontext() != NULL) { |
aoqi@0 | 4068 | _epc = os::Aix::ucontext_get_pc((ucontext_t *) context.ucontext()); |
aoqi@0 | 4069 | } else { |
aoqi@0 | 4070 | // NULL context is unexpected, double-check this is the VMThread. |
aoqi@0 | 4071 | guarantee(thread->is_VM_thread(), "can only be called for VMThread"); |
aoqi@0 | 4072 | } |
aoqi@0 | 4073 | } |
aoqi@0 | 4074 | |
aoqi@0 | 4075 | // Suspends the target using the signal mechanism and then grabs the PC before |
aoqi@0 | 4076 | // resuming the target. Used by the flat-profiler only |
aoqi@0 | 4077 | ExtendedPC os::get_thread_pc(Thread* thread) { |
aoqi@0 | 4078 | // Make sure that it is called by the watcher for the VMThread. |
aoqi@0 | 4079 | assert(Thread::current()->is_Watcher_thread(), "Must be watcher"); |
aoqi@0 | 4080 | assert(thread->is_VM_thread(), "Can only be called for VMThread"); |
aoqi@0 | 4081 | |
aoqi@0 | 4082 | PcFetcher fetcher(thread); |
aoqi@0 | 4083 | fetcher.run(); |
aoqi@0 | 4084 | return fetcher.result(); |
aoqi@0 | 4085 | } |
aoqi@0 | 4086 | |
aoqi@0 | 4087 | // Not neede on Aix. |
aoqi@0 | 4088 | // int os::Aix::safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime) { |
aoqi@0 | 4089 | // } |
aoqi@0 | 4090 | |
aoqi@0 | 4091 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 4092 | // debug support |
aoqi@0 | 4093 | |
aoqi@0 | 4094 | static address same_page(address x, address y) { |
aoqi@0 | 4095 | intptr_t page_bits = -os::vm_page_size(); |
aoqi@0 | 4096 | if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) |
aoqi@0 | 4097 | return x; |
aoqi@0 | 4098 | else if (x > y) |
aoqi@0 | 4099 | return (address)(intptr_t(y) | ~page_bits) + 1; |
aoqi@0 | 4100 | else |
aoqi@0 | 4101 | return (address)(intptr_t(y) & page_bits); |
aoqi@0 | 4102 | } |
aoqi@0 | 4103 | |
aoqi@0 | 4104 | bool os::find(address addr, outputStream* st) { |
aoqi@0 | 4105 | |
aoqi@0 | 4106 | st->print(PTR_FORMAT ": ", addr); |
aoqi@0 | 4107 | |
aoqi@0 | 4108 | const LoadedLibraryModule* lib = LoadedLibraries::find_for_text_address(addr); |
aoqi@0 | 4109 | if (lib) { |
aoqi@0 | 4110 | lib->print(st); |
aoqi@0 | 4111 | return true; |
aoqi@0 | 4112 | } else { |
aoqi@0 | 4113 | lib = LoadedLibraries::find_for_data_address(addr); |
aoqi@0 | 4114 | if (lib) { |
aoqi@0 | 4115 | lib->print(st); |
aoqi@0 | 4116 | return true; |
aoqi@0 | 4117 | } else { |
aoqi@0 | 4118 | st->print_cr("(outside any module)"); |
aoqi@0 | 4119 | } |
aoqi@0 | 4120 | } |
aoqi@0 | 4121 | |
aoqi@0 | 4122 | return false; |
aoqi@0 | 4123 | } |
aoqi@0 | 4124 | |
aoqi@0 | 4125 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 4126 | // misc |
aoqi@0 | 4127 | |
aoqi@0 | 4128 | // This does not do anything on Aix. This is basically a hook for being |
aoqi@0 | 4129 | // able to use structured exception handling (thread-local exception filters) |
aoqi@0 | 4130 | // on, e.g., Win32. |
aoqi@0 | 4131 | void |
aoqi@0 | 4132 | os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, |
aoqi@0 | 4133 | JavaCallArguments* args, Thread* thread) { |
aoqi@0 | 4134 | f(value, method, args, thread); |
aoqi@0 | 4135 | } |
aoqi@0 | 4136 | |
aoqi@0 | 4137 | void os::print_statistics() { |
aoqi@0 | 4138 | } |
aoqi@0 | 4139 | |
aoqi@0 | 4140 | int os::message_box(const char* title, const char* message) { |
aoqi@0 | 4141 | int i; |
aoqi@0 | 4142 | fdStream err(defaultStream::error_fd()); |
aoqi@0 | 4143 | for (i = 0; i < 78; i++) err.print_raw("="); |
aoqi@0 | 4144 | err.cr(); |
aoqi@0 | 4145 | err.print_raw_cr(title); |
aoqi@0 | 4146 | for (i = 0; i < 78; i++) err.print_raw("-"); |
aoqi@0 | 4147 | err.cr(); |
aoqi@0 | 4148 | err.print_raw_cr(message); |
aoqi@0 | 4149 | for (i = 0; i < 78; i++) err.print_raw("="); |
aoqi@0 | 4150 | err.cr(); |
aoqi@0 | 4151 | |
aoqi@0 | 4152 | char buf[16]; |
aoqi@0 | 4153 | // Prevent process from exiting upon "read error" without consuming all CPU |
aoqi@0 | 4154 | while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } |
aoqi@0 | 4155 | |
aoqi@0 | 4156 | return buf[0] == 'y' || buf[0] == 'Y'; |
aoqi@0 | 4157 | } |
aoqi@0 | 4158 | |
aoqi@0 | 4159 | int os::stat(const char *path, struct stat *sbuf) { |
aoqi@0 | 4160 | char pathbuf[MAX_PATH]; |
aoqi@0 | 4161 | if (strlen(path) > MAX_PATH - 1) { |
aoqi@0 | 4162 | errno = ENAMETOOLONG; |
aoqi@0 | 4163 | return -1; |
aoqi@0 | 4164 | } |
aoqi@0 | 4165 | os::native_path(strcpy(pathbuf, path)); |
aoqi@0 | 4166 | return ::stat(pathbuf, sbuf); |
aoqi@0 | 4167 | } |
aoqi@0 | 4168 | |
aoqi@0 | 4169 | bool os::check_heap(bool force) { |
aoqi@0 | 4170 | return true; |
aoqi@0 | 4171 | } |
aoqi@0 | 4172 | |
aoqi@0 | 4173 | // int local_vsnprintf(char* buf, size_t count, const char* format, va_list args) { |
aoqi@0 | 4174 | // return ::vsnprintf(buf, count, format, args); |
aoqi@0 | 4175 | // } |
aoqi@0 | 4176 | |
aoqi@0 | 4177 | // Is a (classpath) directory empty? |
aoqi@0 | 4178 | bool os::dir_is_empty(const char* path) { |
aoqi@0 | 4179 | DIR *dir = NULL; |
aoqi@0 | 4180 | struct dirent *ptr; |
aoqi@0 | 4181 | |
aoqi@0 | 4182 | dir = opendir(path); |
aoqi@0 | 4183 | if (dir == NULL) return true; |
aoqi@0 | 4184 | |
aoqi@0 | 4185 | /* Scan the directory */ |
aoqi@0 | 4186 | bool result = true; |
aoqi@0 | 4187 | char buf[sizeof(struct dirent) + MAX_PATH]; |
aoqi@0 | 4188 | while (result && (ptr = ::readdir(dir)) != NULL) { |
aoqi@0 | 4189 | if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { |
aoqi@0 | 4190 | result = false; |
aoqi@0 | 4191 | } |
aoqi@0 | 4192 | } |
aoqi@0 | 4193 | closedir(dir); |
aoqi@0 | 4194 | return result; |
aoqi@0 | 4195 | } |
aoqi@0 | 4196 | |
aoqi@0 | 4197 | // This code originates from JDK's sysOpen and open64_w |
aoqi@0 | 4198 | // from src/solaris/hpi/src/system_md.c |
aoqi@0 | 4199 | |
aoqi@0 | 4200 | #ifndef O_DELETE |
aoqi@0 | 4201 | #define O_DELETE 0x10000 |
aoqi@0 | 4202 | #endif |
aoqi@0 | 4203 | |
aoqi@0 | 4204 | // Open a file. Unlink the file immediately after open returns |
aoqi@0 | 4205 | // if the specified oflag has the O_DELETE flag set. |
aoqi@0 | 4206 | // O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c |
aoqi@0 | 4207 | |
aoqi@0 | 4208 | int os::open(const char *path, int oflag, int mode) { |
aoqi@0 | 4209 | |
aoqi@0 | 4210 | if (strlen(path) > MAX_PATH - 1) { |
aoqi@0 | 4211 | errno = ENAMETOOLONG; |
aoqi@0 | 4212 | return -1; |
aoqi@0 | 4213 | } |
aoqi@0 | 4214 | int fd; |
aoqi@0 | 4215 | int o_delete = (oflag & O_DELETE); |
aoqi@0 | 4216 | oflag = oflag & ~O_DELETE; |
aoqi@0 | 4217 | |
aoqi@0 | 4218 | fd = ::open64(path, oflag, mode); |
aoqi@0 | 4219 | if (fd == -1) return -1; |
aoqi@0 | 4220 | |
aoqi@0 | 4221 | // If the open succeeded, the file might still be a directory. |
aoqi@0 | 4222 | { |
aoqi@0 | 4223 | struct stat64 buf64; |
aoqi@0 | 4224 | int ret = ::fstat64(fd, &buf64); |
aoqi@0 | 4225 | int st_mode = buf64.st_mode; |
aoqi@0 | 4226 | |
aoqi@0 | 4227 | if (ret != -1) { |
aoqi@0 | 4228 | if ((st_mode & S_IFMT) == S_IFDIR) { |
aoqi@0 | 4229 | errno = EISDIR; |
aoqi@0 | 4230 | ::close(fd); |
aoqi@0 | 4231 | return -1; |
aoqi@0 | 4232 | } |
aoqi@0 | 4233 | } else { |
aoqi@0 | 4234 | ::close(fd); |
aoqi@0 | 4235 | return -1; |
aoqi@0 | 4236 | } |
aoqi@0 | 4237 | } |
aoqi@0 | 4238 | |
aoqi@0 | 4239 | // All file descriptors that are opened in the JVM and not |
aoqi@0 | 4240 | // specifically destined for a subprocess should have the |
aoqi@0 | 4241 | // close-on-exec flag set. If we don't set it, then careless 3rd |
aoqi@0 | 4242 | // party native code might fork and exec without closing all |
aoqi@0 | 4243 | // appropriate file descriptors (e.g. as we do in closeDescriptors in |
aoqi@0 | 4244 | // UNIXProcess.c), and this in turn might: |
aoqi@0 | 4245 | // |
aoqi@0 | 4246 | // - cause end-of-file to fail to be detected on some file |
aoqi@0 | 4247 | // descriptors, resulting in mysterious hangs, or |
aoqi@0 | 4248 | // |
aoqi@0 | 4249 | // - might cause an fopen in the subprocess to fail on a system |
aoqi@0 | 4250 | // suffering from bug 1085341. |
aoqi@0 | 4251 | // |
aoqi@0 | 4252 | // (Yes, the default setting of the close-on-exec flag is a Unix |
aoqi@0 | 4253 | // design flaw.) |
aoqi@0 | 4254 | // |
aoqi@0 | 4255 | // See: |
aoqi@0 | 4256 | // 1085341: 32-bit stdio routines should support file descriptors >255 |
aoqi@0 | 4257 | // 4843136: (process) pipe file descriptor from Runtime.exec not being closed |
aoqi@0 | 4258 | // 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 |
aoqi@0 | 4259 | #ifdef FD_CLOEXEC |
aoqi@0 | 4260 | { |
aoqi@0 | 4261 | int flags = ::fcntl(fd, F_GETFD); |
aoqi@0 | 4262 | if (flags != -1) |
aoqi@0 | 4263 | ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); |
aoqi@0 | 4264 | } |
aoqi@0 | 4265 | #endif |
aoqi@0 | 4266 | |
aoqi@0 | 4267 | if (o_delete != 0) { |
aoqi@0 | 4268 | ::unlink(path); |
aoqi@0 | 4269 | } |
aoqi@0 | 4270 | return fd; |
aoqi@0 | 4271 | } |
aoqi@0 | 4272 | |
aoqi@0 | 4273 | // create binary file, rewriting existing file if required |
aoqi@0 | 4274 | int os::create_binary_file(const char* path, bool rewrite_existing) { |
aoqi@0 | 4275 | int oflags = O_WRONLY | O_CREAT; |
aoqi@0 | 4276 | if (!rewrite_existing) { |
aoqi@0 | 4277 | oflags |= O_EXCL; |
aoqi@0 | 4278 | } |
aoqi@0 | 4279 | return ::open64(path, oflags, S_IREAD | S_IWRITE); |
aoqi@0 | 4280 | } |
aoqi@0 | 4281 | |
aoqi@0 | 4282 | // return current position of file pointer |
aoqi@0 | 4283 | jlong os::current_file_offset(int fd) { |
aoqi@0 | 4284 | return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); |
aoqi@0 | 4285 | } |
aoqi@0 | 4286 | |
aoqi@0 | 4287 | // move file pointer to the specified offset |
aoqi@0 | 4288 | jlong os::seek_to_file_offset(int fd, jlong offset) { |
aoqi@0 | 4289 | return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); |
aoqi@0 | 4290 | } |
aoqi@0 | 4291 | |
aoqi@0 | 4292 | // This code originates from JDK's sysAvailable |
aoqi@0 | 4293 | // from src/solaris/hpi/src/native_threads/src/sys_api_td.c |
aoqi@0 | 4294 | |
aoqi@0 | 4295 | int os::available(int fd, jlong *bytes) { |
aoqi@0 | 4296 | jlong cur, end; |
aoqi@0 | 4297 | int mode; |
aoqi@0 | 4298 | struct stat64 buf64; |
aoqi@0 | 4299 | |
aoqi@0 | 4300 | if (::fstat64(fd, &buf64) >= 0) { |
aoqi@0 | 4301 | mode = buf64.st_mode; |
aoqi@0 | 4302 | if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { |
aoqi@0 | 4303 | // XXX: is the following call interruptible? If so, this might |
aoqi@0 | 4304 | // need to go through the INTERRUPT_IO() wrapper as for other |
aoqi@0 | 4305 | // blocking, interruptible calls in this file. |
aoqi@0 | 4306 | int n; |
aoqi@0 | 4307 | if (::ioctl(fd, FIONREAD, &n) >= 0) { |
aoqi@0 | 4308 | *bytes = n; |
aoqi@0 | 4309 | return 1; |
aoqi@0 | 4310 | } |
aoqi@0 | 4311 | } |
aoqi@0 | 4312 | } |
aoqi@0 | 4313 | if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { |
aoqi@0 | 4314 | return 0; |
aoqi@0 | 4315 | } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) { |
aoqi@0 | 4316 | return 0; |
aoqi@0 | 4317 | } else if (::lseek64(fd, cur, SEEK_SET) == -1) { |
aoqi@0 | 4318 | return 0; |
aoqi@0 | 4319 | } |
aoqi@0 | 4320 | *bytes = end - cur; |
aoqi@0 | 4321 | return 1; |
aoqi@0 | 4322 | } |
aoqi@0 | 4323 | |
aoqi@0 | 4324 | int os::socket_available(int fd, jint *pbytes) { |
aoqi@0 | 4325 | // Linux doc says EINTR not returned, unlike Solaris |
aoqi@0 | 4326 | int ret = ::ioctl(fd, FIONREAD, pbytes); |
aoqi@0 | 4327 | |
aoqi@0 | 4328 | //%% note ioctl can return 0 when successful, JVM_SocketAvailable |
aoqi@0 | 4329 | // is expected to return 0 on failure and 1 on success to the jdk. |
aoqi@0 | 4330 | return (ret < 0) ? 0 : 1; |
aoqi@0 | 4331 | } |
aoqi@0 | 4332 | |
aoqi@0 | 4333 | // Map a block of memory. |
aoqi@0 | 4334 | char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, |
aoqi@0 | 4335 | char *addr, size_t bytes, bool read_only, |
aoqi@0 | 4336 | bool allow_exec) { |
aoqi@0 | 4337 | Unimplemented(); |
aoqi@0 | 4338 | return NULL; |
aoqi@0 | 4339 | } |
aoqi@0 | 4340 | |
aoqi@0 | 4341 | // Remap a block of memory. |
aoqi@0 | 4342 | char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, |
aoqi@0 | 4343 | char *addr, size_t bytes, bool read_only, |
aoqi@0 | 4344 | bool allow_exec) { |
aoqi@0 | 4345 | // same as map_memory() on this OS |
aoqi@0 | 4346 | return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, |
aoqi@0 | 4347 | allow_exec); |
aoqi@0 | 4348 | } |
aoqi@0 | 4349 | |
aoqi@0 | 4350 | // Unmap a block of memory. |
aoqi@0 | 4351 | bool os::pd_unmap_memory(char* addr, size_t bytes) { |
aoqi@0 | 4352 | return munmap(addr, bytes) == 0; |
aoqi@0 | 4353 | } |
aoqi@0 | 4354 | |
aoqi@0 | 4355 | // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) |
aoqi@0 | 4356 | // are used by JVM M&M and JVMTI to get user+sys or user CPU time |
aoqi@0 | 4357 | // of a thread. |
aoqi@0 | 4358 | // |
aoqi@0 | 4359 | // current_thread_cpu_time() and thread_cpu_time(Thread*) returns |
aoqi@0 | 4360 | // the fast estimate available on the platform. |
aoqi@0 | 4361 | |
aoqi@0 | 4362 | jlong os::current_thread_cpu_time() { |
aoqi@0 | 4363 | // return user + sys since the cost is the same |
aoqi@0 | 4364 | const jlong n = os::thread_cpu_time(Thread::current(), true /* user + sys */); |
aoqi@0 | 4365 | assert(n >= 0, "negative CPU time"); |
aoqi@0 | 4366 | return n; |
aoqi@0 | 4367 | } |
aoqi@0 | 4368 | |
aoqi@0 | 4369 | jlong os::thread_cpu_time(Thread* thread) { |
aoqi@0 | 4370 | // consistent with what current_thread_cpu_time() returns |
aoqi@0 | 4371 | const jlong n = os::thread_cpu_time(thread, true /* user + sys */); |
aoqi@0 | 4372 | assert(n >= 0, "negative CPU time"); |
aoqi@0 | 4373 | return n; |
aoqi@0 | 4374 | } |
aoqi@0 | 4375 | |
aoqi@0 | 4376 | jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { |
aoqi@0 | 4377 | const jlong n = os::thread_cpu_time(Thread::current(), user_sys_cpu_time); |
aoqi@0 | 4378 | assert(n >= 0, "negative CPU time"); |
aoqi@0 | 4379 | return n; |
aoqi@0 | 4380 | } |
aoqi@0 | 4381 | |
aoqi@0 | 4382 | static bool thread_cpu_time_unchecked(Thread* thread, jlong* p_sys_time, jlong* p_user_time) { |
aoqi@0 | 4383 | bool error = false; |
aoqi@0 | 4384 | |
aoqi@0 | 4385 | jlong sys_time = 0; |
aoqi@0 | 4386 | jlong user_time = 0; |
aoqi@0 | 4387 | |
goetz@7424 | 4388 | // Reimplemented using getthrds64(). |
aoqi@0 | 4389 | // |
goetz@7424 | 4390 | // Works like this: |
aoqi@0 | 4391 | // For the thread in question, get the kernel thread id. Then get the |
aoqi@0 | 4392 | // kernel thread statistics using that id. |
aoqi@0 | 4393 | // |
aoqi@0 | 4394 | // This only works of course when no pthread scheduling is used, |
goetz@7424 | 4395 | // i.e. there is a 1:1 relationship to kernel threads. |
aoqi@0 | 4396 | // On AIX, see AIXTHREAD_SCOPE variable. |
aoqi@0 | 4397 | |
aoqi@0 | 4398 | pthread_t pthtid = thread->osthread()->pthread_id(); |
aoqi@0 | 4399 | |
aoqi@0 | 4400 | // retrieve kernel thread id for the pthread: |
aoqi@0 | 4401 | tid64_t tid = 0; |
aoqi@0 | 4402 | struct __pthrdsinfo pinfo; |
aoqi@0 | 4403 | // I just love those otherworldly IBM APIs which force me to hand down |
aoqi@0 | 4404 | // dummy buffers for stuff I dont care for... |
aoqi@0 | 4405 | char dummy[1]; |
aoqi@0 | 4406 | int dummy_size = sizeof(dummy); |
aoqi@0 | 4407 | if (pthread_getthrds_np(&pthtid, PTHRDSINFO_QUERY_TID, &pinfo, sizeof(pinfo), |
aoqi@0 | 4408 | dummy, &dummy_size) == 0) { |
aoqi@0 | 4409 | tid = pinfo.__pi_tid; |
aoqi@0 | 4410 | } else { |
aoqi@0 | 4411 | tty->print_cr("pthread_getthrds_np failed."); |
aoqi@0 | 4412 | error = true; |
aoqi@0 | 4413 | } |
aoqi@0 | 4414 | |
aoqi@0 | 4415 | // retrieve kernel timing info for that kernel thread |
aoqi@0 | 4416 | if (!error) { |
aoqi@0 | 4417 | struct thrdentry64 thrdentry; |
aoqi@0 | 4418 | if (getthrds64(getpid(), &thrdentry, sizeof(thrdentry), &tid, 1) == 1) { |
aoqi@0 | 4419 | sys_time = thrdentry.ti_ru.ru_stime.tv_sec * 1000000000LL + thrdentry.ti_ru.ru_stime.tv_usec * 1000LL; |
aoqi@0 | 4420 | user_time = thrdentry.ti_ru.ru_utime.tv_sec * 1000000000LL + thrdentry.ti_ru.ru_utime.tv_usec * 1000LL; |
aoqi@0 | 4421 | } else { |
aoqi@0 | 4422 | tty->print_cr("pthread_getthrds_np failed."); |
aoqi@0 | 4423 | error = true; |
aoqi@0 | 4424 | } |
aoqi@0 | 4425 | } |
aoqi@0 | 4426 | |
aoqi@0 | 4427 | if (p_sys_time) { |
aoqi@0 | 4428 | *p_sys_time = sys_time; |
aoqi@0 | 4429 | } |
aoqi@0 | 4430 | |
aoqi@0 | 4431 | if (p_user_time) { |
aoqi@0 | 4432 | *p_user_time = user_time; |
aoqi@0 | 4433 | } |
aoqi@0 | 4434 | |
aoqi@0 | 4435 | if (error) { |
aoqi@0 | 4436 | return false; |
aoqi@0 | 4437 | } |
aoqi@0 | 4438 | |
aoqi@0 | 4439 | return true; |
aoqi@0 | 4440 | } |
aoqi@0 | 4441 | |
aoqi@0 | 4442 | jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { |
aoqi@0 | 4443 | jlong sys_time; |
aoqi@0 | 4444 | jlong user_time; |
aoqi@0 | 4445 | |
aoqi@0 | 4446 | if (!thread_cpu_time_unchecked(thread, &sys_time, &user_time)) { |
aoqi@0 | 4447 | return -1; |
aoqi@0 | 4448 | } |
aoqi@0 | 4449 | |
aoqi@0 | 4450 | return user_sys_cpu_time ? sys_time + user_time : user_time; |
aoqi@0 | 4451 | } |
aoqi@0 | 4452 | |
aoqi@0 | 4453 | void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { |
aoqi@0 | 4454 | info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits |
aoqi@0 | 4455 | info_ptr->may_skip_backward = false; // elapsed time not wall time |
aoqi@0 | 4456 | info_ptr->may_skip_forward = false; // elapsed time not wall time |
aoqi@0 | 4457 | info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned |
aoqi@0 | 4458 | } |
aoqi@0 | 4459 | |
aoqi@0 | 4460 | void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { |
aoqi@0 | 4461 | info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits |
aoqi@0 | 4462 | info_ptr->may_skip_backward = false; // elapsed time not wall time |
aoqi@0 | 4463 | info_ptr->may_skip_forward = false; // elapsed time not wall time |
aoqi@0 | 4464 | info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned |
aoqi@0 | 4465 | } |
aoqi@0 | 4466 | |
aoqi@0 | 4467 | bool os::is_thread_cpu_time_supported() { |
aoqi@0 | 4468 | return true; |
aoqi@0 | 4469 | } |
aoqi@0 | 4470 | |
aoqi@0 | 4471 | // System loadavg support. Returns -1 if load average cannot be obtained. |
aoqi@0 | 4472 | // For now just return the system wide load average (no processor sets). |
aoqi@0 | 4473 | int os::loadavg(double values[], int nelem) { |
aoqi@0 | 4474 | |
aoqi@0 | 4475 | // Implemented using libperfstat on AIX. |
aoqi@0 | 4476 | |
aoqi@0 | 4477 | guarantee(nelem >= 0 && nelem <= 3, "argument error"); |
aoqi@0 | 4478 | guarantee(values, "argument error"); |
aoqi@0 | 4479 | |
aoqi@0 | 4480 | if (os::Aix::on_pase()) { |
aoqi@0 | 4481 | Unimplemented(); |
aoqi@0 | 4482 | return -1; |
aoqi@0 | 4483 | } else { |
aoqi@0 | 4484 | // AIX: use libperfstat |
aoqi@0 | 4485 | // |
aoqi@0 | 4486 | // See also: |
aoqi@0 | 4487 | // http://publib.boulder.ibm.com/infocenter/pseries/v5r3/index.jsp?topic=/com.ibm.aix.basetechref/doc/basetrf1/perfstat_cputot.htm |
aoqi@0 | 4488 | // /usr/include/libperfstat.h: |
aoqi@0 | 4489 | |
aoqi@0 | 4490 | // Use the already AIX version independent get_cpuinfo. |
aoqi@0 | 4491 | os::Aix::cpuinfo_t ci; |
aoqi@0 | 4492 | if (os::Aix::get_cpuinfo(&ci)) { |
aoqi@0 | 4493 | for (int i = 0; i < nelem; i++) { |
aoqi@0 | 4494 | values[i] = ci.loadavg[i]; |
aoqi@0 | 4495 | } |
aoqi@0 | 4496 | } else { |
aoqi@0 | 4497 | return -1; |
aoqi@0 | 4498 | } |
aoqi@0 | 4499 | return nelem; |
aoqi@0 | 4500 | } |
aoqi@0 | 4501 | } |
aoqi@0 | 4502 | |
aoqi@0 | 4503 | void os::pause() { |
aoqi@0 | 4504 | char filename[MAX_PATH]; |
aoqi@0 | 4505 | if (PauseAtStartupFile && PauseAtStartupFile[0]) { |
aoqi@0 | 4506 | jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); |
aoqi@0 | 4507 | } else { |
aoqi@0 | 4508 | jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); |
aoqi@0 | 4509 | } |
aoqi@0 | 4510 | |
aoqi@0 | 4511 | int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); |
aoqi@0 | 4512 | if (fd != -1) { |
aoqi@0 | 4513 | struct stat buf; |
aoqi@0 | 4514 | ::close(fd); |
aoqi@0 | 4515 | while (::stat(filename, &buf) == 0) { |
aoqi@0 | 4516 | (void)::poll(NULL, 0, 100); |
aoqi@0 | 4517 | } |
aoqi@0 | 4518 | } else { |
aoqi@0 | 4519 | jio_fprintf(stderr, |
aoqi@0 | 4520 | "Could not open pause file '%s', continuing immediately.\n", filename); |
aoqi@0 | 4521 | } |
aoqi@0 | 4522 | } |
aoqi@0 | 4523 | |
dbuck@9289 | 4524 | bool os::is_primordial_thread(void) { |
aoqi@0 | 4525 | if (pthread_self() == (pthread_t)1) { |
aoqi@0 | 4526 | return true; |
aoqi@0 | 4527 | } else { |
aoqi@0 | 4528 | return false; |
aoqi@0 | 4529 | } |
aoqi@0 | 4530 | } |
aoqi@0 | 4531 | |
aoqi@0 | 4532 | // OS recognitions (PASE/AIX, OS level) call this before calling any |
aoqi@0 | 4533 | // one of Aix::on_pase(), Aix::os_version() static |
aoqi@0 | 4534 | void os::Aix::initialize_os_info() { |
aoqi@0 | 4535 | |
aoqi@0 | 4536 | assert(_on_pase == -1 && _os_version == -1, "already called."); |
aoqi@0 | 4537 | |
aoqi@0 | 4538 | struct utsname uts; |
aoqi@0 | 4539 | memset(&uts, 0, sizeof(uts)); |
aoqi@0 | 4540 | strcpy(uts.sysname, "?"); |
aoqi@0 | 4541 | if (::uname(&uts) == -1) { |
goetz@7424 | 4542 | trc("uname failed (%d)", errno); |
aoqi@0 | 4543 | guarantee(0, "Could not determine whether we run on AIX or PASE"); |
aoqi@0 | 4544 | } else { |
goetz@7424 | 4545 | trcVerbose("uname says: sysname \"%s\" version \"%s\" release \"%s\" " |
goetz@7424 | 4546 | "node \"%s\" machine \"%s\"\n", |
goetz@7424 | 4547 | uts.sysname, uts.version, uts.release, uts.nodename, uts.machine); |
aoqi@0 | 4548 | const int major = atoi(uts.version); |
aoqi@0 | 4549 | assert(major > 0, "invalid OS version"); |
aoqi@0 | 4550 | const int minor = atoi(uts.release); |
aoqi@0 | 4551 | assert(minor > 0, "invalid OS release"); |
aoqi@0 | 4552 | _os_version = (major << 8) | minor; |
aoqi@0 | 4553 | if (strcmp(uts.sysname, "OS400") == 0) { |
aoqi@0 | 4554 | Unimplemented(); |
aoqi@0 | 4555 | } else if (strcmp(uts.sysname, "AIX") == 0) { |
aoqi@0 | 4556 | // We run on AIX. We do not support versions older than AIX 5.3. |
aoqi@0 | 4557 | _on_pase = 0; |
aoqi@0 | 4558 | if (_os_version < 0x0503) { |
goetz@7424 | 4559 | trc("AIX release older than AIX 5.3 not supported."); |
aoqi@0 | 4560 | assert(false, "AIX release too old."); |
aoqi@0 | 4561 | } else { |
goetz@7424 | 4562 | trcVerbose("We run on AIX %d.%d\n", major, minor); |
aoqi@0 | 4563 | } |
aoqi@0 | 4564 | } else { |
aoqi@0 | 4565 | assert(false, "unknown OS"); |
aoqi@0 | 4566 | } |
aoqi@0 | 4567 | } |
aoqi@0 | 4568 | |
aoqi@0 | 4569 | guarantee(_on_pase != -1 && _os_version, "Could not determine AIX/OS400 release"); |
aoqi@0 | 4570 | } // end: os::Aix::initialize_os_info() |
aoqi@0 | 4571 | |
aoqi@0 | 4572 | // Scan environment for important settings which might effect the VM. |
aoqi@0 | 4573 | // Trace out settings. Warn about invalid settings and/or correct them. |
aoqi@0 | 4574 | // |
aoqi@0 | 4575 | // Must run after os::Aix::initialue_os_info(). |
aoqi@0 | 4576 | void os::Aix::scan_environment() { |
aoqi@0 | 4577 | |
aoqi@0 | 4578 | char* p; |
aoqi@0 | 4579 | int rc; |
aoqi@0 | 4580 | |
aoqi@0 | 4581 | // Warn explicity if EXTSHM=ON is used. That switch changes how |
aoqi@0 | 4582 | // System V shared memory behaves. One effect is that page size of |
aoqi@0 | 4583 | // shared memory cannot be change dynamically, effectivly preventing |
aoqi@0 | 4584 | // large pages from working. |
aoqi@0 | 4585 | // This switch was needed on AIX 32bit, but on AIX 64bit the general |
aoqi@0 | 4586 | // recommendation is (in OSS notes) to switch it off. |
aoqi@0 | 4587 | p = ::getenv("EXTSHM"); |
aoqi@0 | 4588 | if (Verbose) { |
aoqi@0 | 4589 | fprintf(stderr, "EXTSHM=%s.\n", p ? p : "<unset>"); |
aoqi@0 | 4590 | } |
aoqi@0 | 4591 | if (p && strcmp(p, "ON") == 0) { |
aoqi@0 | 4592 | fprintf(stderr, "Unsupported setting: EXTSHM=ON. Large Page support will be disabled.\n"); |
aoqi@0 | 4593 | _extshm = 1; |
aoqi@0 | 4594 | } else { |
aoqi@0 | 4595 | _extshm = 0; |
aoqi@0 | 4596 | } |
aoqi@0 | 4597 | |
aoqi@0 | 4598 | // SPEC1170 behaviour: will change the behaviour of a number of POSIX APIs. |
aoqi@0 | 4599 | // Not tested, not supported. |
aoqi@0 | 4600 | // |
aoqi@0 | 4601 | // Note that it might be worth the trouble to test and to require it, if only to |
aoqi@0 | 4602 | // get useful return codes for mprotect. |
aoqi@0 | 4603 | // |
aoqi@0 | 4604 | // Note: Setting XPG_SUS_ENV in the process is too late. Must be set earlier (before |
aoqi@0 | 4605 | // exec() ? before loading the libjvm ? ....) |
aoqi@0 | 4606 | p = ::getenv("XPG_SUS_ENV"); |
goetz@7424 | 4607 | trcVerbose("XPG_SUS_ENV=%s.", p ? p : "<unset>"); |
aoqi@0 | 4608 | if (p && strcmp(p, "ON") == 0) { |
aoqi@0 | 4609 | _xpg_sus_mode = 1; |
goetz@7424 | 4610 | trc("Unsupported setting: XPG_SUS_ENV=ON"); |
aoqi@0 | 4611 | // This is not supported. Worst of all, it changes behaviour of mmap MAP_FIXED to |
aoqi@0 | 4612 | // clobber address ranges. If we ever want to support that, we have to do some |
aoqi@0 | 4613 | // testing first. |
aoqi@0 | 4614 | guarantee(false, "XPG_SUS_ENV=ON not supported"); |
aoqi@0 | 4615 | } else { |
aoqi@0 | 4616 | _xpg_sus_mode = 0; |
aoqi@0 | 4617 | } |
aoqi@0 | 4618 | |
aoqi@0 | 4619 | // Switch off AIX internal (pthread) guard pages. This has |
aoqi@0 | 4620 | // immediate effect for any pthread_create calls which follow. |
aoqi@0 | 4621 | p = ::getenv("AIXTHREAD_GUARDPAGES"); |
goetz@7424 | 4622 | trcVerbose("AIXTHREAD_GUARDPAGES=%s.", p ? p : "<unset>"); |
aoqi@0 | 4623 | rc = ::putenv("AIXTHREAD_GUARDPAGES=0"); |
aoqi@0 | 4624 | guarantee(rc == 0, ""); |
aoqi@0 | 4625 | |
aoqi@0 | 4626 | } // end: os::Aix::scan_environment() |
aoqi@0 | 4627 | |
aoqi@0 | 4628 | // PASE: initialize the libo4 library (AS400 PASE porting library). |
aoqi@0 | 4629 | void os::Aix::initialize_libo4() { |
aoqi@0 | 4630 | Unimplemented(); |
aoqi@0 | 4631 | } |
aoqi@0 | 4632 | |
aoqi@0 | 4633 | // AIX: initialize the libperfstat library (we load this dynamically |
aoqi@0 | 4634 | // because it is only available on AIX. |
aoqi@0 | 4635 | void os::Aix::initialize_libperfstat() { |
aoqi@0 | 4636 | |
aoqi@0 | 4637 | assert(os::Aix::on_aix(), "AIX only"); |
aoqi@0 | 4638 | |
aoqi@0 | 4639 | if (!libperfstat::init()) { |
goetz@7424 | 4640 | trc("libperfstat initialization failed."); |
aoqi@0 | 4641 | assert(false, "libperfstat initialization failed"); |
aoqi@0 | 4642 | } else { |
aoqi@0 | 4643 | if (Verbose) { |
aoqi@0 | 4644 | fprintf(stderr, "libperfstat initialized.\n"); |
aoqi@0 | 4645 | } |
aoqi@0 | 4646 | } |
aoqi@0 | 4647 | } // end: os::Aix::initialize_libperfstat |
aoqi@0 | 4648 | |
aoqi@0 | 4649 | ///////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 4650 | // thread stack |
aoqi@0 | 4651 | |
aoqi@0 | 4652 | // function to query the current stack size using pthread_getthrds_np |
aoqi@0 | 4653 | // |
aoqi@0 | 4654 | // ! do not change anything here unless you know what you are doing ! |
aoqi@0 | 4655 | static void query_stack_dimensions(address* p_stack_base, size_t* p_stack_size) { |
aoqi@0 | 4656 | |
aoqi@0 | 4657 | // This only works when invoked on a pthread. As we agreed not to use |
aoqi@0 | 4658 | // primordial threads anyway, I assert here |
dbuck@9289 | 4659 | guarantee(!os::is_primordial_thread(), "not allowed on the primordial thread"); |
aoqi@0 | 4660 | |
aoqi@0 | 4661 | // information about this api can be found (a) in the pthread.h header and |
aoqi@0 | 4662 | // (b) in http://publib.boulder.ibm.com/infocenter/pseries/v5r3/index.jsp?topic=/com.ibm.aix.basetechref/doc/basetrf1/pthread_getthrds_np.htm |
aoqi@0 | 4663 | // |
aoqi@0 | 4664 | // The use of this API to find out the current stack is kind of undefined. |
aoqi@0 | 4665 | // But after a lot of tries and asking IBM about it, I concluded that it is safe |
aoqi@0 | 4666 | // enough for cases where I let the pthread library create its stacks. For cases |
aoqi@0 | 4667 | // where I create an own stack and pass this to pthread_create, it seems not to |
aoqi@0 | 4668 | // work (the returned stack size in that case is 0). |
aoqi@0 | 4669 | |
aoqi@0 | 4670 | pthread_t tid = pthread_self(); |
aoqi@0 | 4671 | struct __pthrdsinfo pinfo; |
aoqi@0 | 4672 | char dummy[1]; // we only need this to satisfy the api and to not get E |
aoqi@0 | 4673 | int dummy_size = sizeof(dummy); |
aoqi@0 | 4674 | |
aoqi@0 | 4675 | memset(&pinfo, 0, sizeof(pinfo)); |
aoqi@0 | 4676 | |
aoqi@0 | 4677 | const int rc = pthread_getthrds_np (&tid, PTHRDSINFO_QUERY_ALL, &pinfo, |
aoqi@0 | 4678 | sizeof(pinfo), dummy, &dummy_size); |
aoqi@0 | 4679 | |
aoqi@0 | 4680 | if (rc != 0) { |
aoqi@0 | 4681 | fprintf(stderr, "pthread_getthrds_np failed (%d)\n", rc); |
aoqi@0 | 4682 | guarantee(0, "pthread_getthrds_np failed"); |
aoqi@0 | 4683 | } |
aoqi@0 | 4684 | |
aoqi@0 | 4685 | guarantee(pinfo.__pi_stackend, "returned stack base invalid"); |
aoqi@0 | 4686 | |
aoqi@0 | 4687 | // the following can happen when invoking pthread_getthrds_np on a pthread running on a user provided stack |
aoqi@0 | 4688 | // (when handing down a stack to pthread create, see pthread_attr_setstackaddr). |
aoqi@0 | 4689 | // Not sure what to do here - I feel inclined to forbid this use case completely. |
aoqi@0 | 4690 | guarantee(pinfo.__pi_stacksize, "returned stack size invalid"); |
aoqi@0 | 4691 | |
aoqi@0 | 4692 | // On AIX, stacks are not necessarily page aligned so round the base and size accordingly |
aoqi@0 | 4693 | if (p_stack_base) { |
aoqi@0 | 4694 | (*p_stack_base) = (address) align_size_up((intptr_t)pinfo.__pi_stackend, os::Aix::stack_page_size()); |
aoqi@0 | 4695 | } |
aoqi@0 | 4696 | |
aoqi@0 | 4697 | if (p_stack_size) { |
aoqi@0 | 4698 | (*p_stack_size) = pinfo.__pi_stacksize - os::Aix::stack_page_size(); |
aoqi@0 | 4699 | } |
aoqi@0 | 4700 | |
aoqi@0 | 4701 | #ifndef PRODUCT |
aoqi@0 | 4702 | if (Verbose) { |
aoqi@0 | 4703 | fprintf(stderr, |
aoqi@0 | 4704 | "query_stack_dimensions() -> real stack_base=" INTPTR_FORMAT ", real stack_addr=" INTPTR_FORMAT |
aoqi@0 | 4705 | ", real stack_size=" INTPTR_FORMAT |
aoqi@0 | 4706 | ", stack_base=" INTPTR_FORMAT ", stack_size=" INTPTR_FORMAT "\n", |
aoqi@0 | 4707 | (intptr_t)pinfo.__pi_stackend, (intptr_t)pinfo.__pi_stackaddr, pinfo.__pi_stacksize, |
aoqi@0 | 4708 | (intptr_t)align_size_up((intptr_t)pinfo.__pi_stackend, os::Aix::stack_page_size()), |
aoqi@0 | 4709 | pinfo.__pi_stacksize - os::Aix::stack_page_size()); |
aoqi@0 | 4710 | } |
aoqi@0 | 4711 | #endif |
aoqi@0 | 4712 | |
aoqi@0 | 4713 | } // end query_stack_dimensions |
aoqi@0 | 4714 | |
aoqi@0 | 4715 | // get the current stack base from the OS (actually, the pthread library) |
aoqi@0 | 4716 | address os::current_stack_base() { |
aoqi@0 | 4717 | address p; |
aoqi@0 | 4718 | query_stack_dimensions(&p, 0); |
aoqi@0 | 4719 | return p; |
aoqi@0 | 4720 | } |
aoqi@0 | 4721 | |
aoqi@0 | 4722 | // get the current stack size from the OS (actually, the pthread library) |
aoqi@0 | 4723 | size_t os::current_stack_size() { |
aoqi@0 | 4724 | size_t s; |
aoqi@0 | 4725 | query_stack_dimensions(0, &s); |
aoqi@0 | 4726 | return s; |
aoqi@0 | 4727 | } |
aoqi@0 | 4728 | |
aoqi@0 | 4729 | // Refer to the comments in os_solaris.cpp park-unpark. |
aoqi@0 | 4730 | // |
aoqi@0 | 4731 | // Beware -- Some versions of NPTL embody a flaw where pthread_cond_timedwait() can |
aoqi@0 | 4732 | // hang indefinitely. For instance NPTL 0.60 on 2.4.21-4ELsmp is vulnerable. |
aoqi@0 | 4733 | // For specifics regarding the bug see GLIBC BUGID 261237 : |
aoqi@0 | 4734 | // http://www.mail-archive.com/debian-glibc@lists.debian.org/msg10837.html. |
aoqi@0 | 4735 | // Briefly, pthread_cond_timedwait() calls with an expiry time that's not in the future |
aoqi@0 | 4736 | // will either hang or corrupt the condvar, resulting in subsequent hangs if the condvar |
aoqi@0 | 4737 | // is used. (The simple C test-case provided in the GLIBC bug report manifests the |
aoqi@0 | 4738 | // hang). The JVM is vulernable via sleep(), Object.wait(timo), LockSupport.parkNanos() |
aoqi@0 | 4739 | // and monitorenter when we're using 1-0 locking. All those operations may result in |
aoqi@0 | 4740 | // calls to pthread_cond_timedwait(). Using LD_ASSUME_KERNEL to use an older version |
aoqi@0 | 4741 | // of libpthread avoids the problem, but isn't practical. |
aoqi@0 | 4742 | // |
aoqi@0 | 4743 | // Possible remedies: |
aoqi@0 | 4744 | // |
aoqi@0 | 4745 | // 1. Establish a minimum relative wait time. 50 to 100 msecs seems to work. |
aoqi@0 | 4746 | // This is palliative and probabilistic, however. If the thread is preempted |
aoqi@0 | 4747 | // between the call to compute_abstime() and pthread_cond_timedwait(), more |
aoqi@0 | 4748 | // than the minimum period may have passed, and the abstime may be stale (in the |
aoqi@0 | 4749 | // past) resultin in a hang. Using this technique reduces the odds of a hang |
aoqi@0 | 4750 | // but the JVM is still vulnerable, particularly on heavily loaded systems. |
aoqi@0 | 4751 | // |
aoqi@0 | 4752 | // 2. Modify park-unpark to use per-thread (per ParkEvent) pipe-pairs instead |
aoqi@0 | 4753 | // of the usual flag-condvar-mutex idiom. The write side of the pipe is set |
aoqi@0 | 4754 | // NDELAY. unpark() reduces to write(), park() reduces to read() and park(timo) |
aoqi@0 | 4755 | // reduces to poll()+read(). This works well, but consumes 2 FDs per extant |
aoqi@0 | 4756 | // thread. |
aoqi@0 | 4757 | // |
aoqi@0 | 4758 | // 3. Embargo pthread_cond_timedwait() and implement a native "chron" thread |
aoqi@0 | 4759 | // that manages timeouts. We'd emulate pthread_cond_timedwait() by enqueuing |
aoqi@0 | 4760 | // a timeout request to the chron thread and then blocking via pthread_cond_wait(). |
aoqi@0 | 4761 | // This also works well. In fact it avoids kernel-level scalability impediments |
aoqi@0 | 4762 | // on certain platforms that don't handle lots of active pthread_cond_timedwait() |
aoqi@0 | 4763 | // timers in a graceful fashion. |
aoqi@0 | 4764 | // |
aoqi@0 | 4765 | // 4. When the abstime value is in the past it appears that control returns |
aoqi@0 | 4766 | // correctly from pthread_cond_timedwait(), but the condvar is left corrupt. |
aoqi@0 | 4767 | // Subsequent timedwait/wait calls may hang indefinitely. Given that, we |
aoqi@0 | 4768 | // can avoid the problem by reinitializing the condvar -- by cond_destroy() |
aoqi@0 | 4769 | // followed by cond_init() -- after all calls to pthread_cond_timedwait(). |
aoqi@0 | 4770 | // It may be possible to avoid reinitialization by checking the return |
aoqi@0 | 4771 | // value from pthread_cond_timedwait(). In addition to reinitializing the |
aoqi@0 | 4772 | // condvar we must establish the invariant that cond_signal() is only called |
aoqi@0 | 4773 | // within critical sections protected by the adjunct mutex. This prevents |
aoqi@0 | 4774 | // cond_signal() from "seeing" a condvar that's in the midst of being |
aoqi@0 | 4775 | // reinitialized or that is corrupt. Sadly, this invariant obviates the |
aoqi@0 | 4776 | // desirable signal-after-unlock optimization that avoids futile context switching. |
aoqi@0 | 4777 | // |
aoqi@0 | 4778 | // I'm also concerned that some versions of NTPL might allocate an auxilliary |
aoqi@0 | 4779 | // structure when a condvar is used or initialized. cond_destroy() would |
aoqi@0 | 4780 | // release the helper structure. Our reinitialize-after-timedwait fix |
aoqi@0 | 4781 | // put excessive stress on malloc/free and locks protecting the c-heap. |
aoqi@0 | 4782 | // |
aoqi@0 | 4783 | // We currently use (4). See the WorkAroundNTPLTimedWaitHang flag. |
aoqi@0 | 4784 | // It may be possible to refine (4) by checking the kernel and NTPL verisons |
aoqi@0 | 4785 | // and only enabling the work-around for vulnerable environments. |
aoqi@0 | 4786 | |
aoqi@0 | 4787 | // utility to compute the abstime argument to timedwait: |
aoqi@0 | 4788 | // millis is the relative timeout time |
aoqi@0 | 4789 | // abstime will be the absolute timeout time |
aoqi@0 | 4790 | // TODO: replace compute_abstime() with unpackTime() |
aoqi@0 | 4791 | |
aoqi@0 | 4792 | static struct timespec* compute_abstime(timespec* abstime, jlong millis) { |
aoqi@0 | 4793 | if (millis < 0) millis = 0; |
aoqi@0 | 4794 | struct timeval now; |
aoqi@0 | 4795 | int status = gettimeofday(&now, NULL); |
aoqi@0 | 4796 | assert(status == 0, "gettimeofday"); |
aoqi@0 | 4797 | jlong seconds = millis / 1000; |
aoqi@0 | 4798 | millis %= 1000; |
aoqi@0 | 4799 | if (seconds > 50000000) { // see man cond_timedwait(3T) |
aoqi@0 | 4800 | seconds = 50000000; |
aoqi@0 | 4801 | } |
aoqi@0 | 4802 | abstime->tv_sec = now.tv_sec + seconds; |
aoqi@0 | 4803 | long usec = now.tv_usec + millis * 1000; |
aoqi@0 | 4804 | if (usec >= 1000000) { |
aoqi@0 | 4805 | abstime->tv_sec += 1; |
aoqi@0 | 4806 | usec -= 1000000; |
aoqi@0 | 4807 | } |
aoqi@0 | 4808 | abstime->tv_nsec = usec * 1000; |
aoqi@0 | 4809 | return abstime; |
aoqi@0 | 4810 | } |
aoqi@0 | 4811 | |
aoqi@0 | 4812 | // Test-and-clear _Event, always leaves _Event set to 0, returns immediately. |
aoqi@0 | 4813 | // Conceptually TryPark() should be equivalent to park(0). |
aoqi@0 | 4814 | |
aoqi@0 | 4815 | int os::PlatformEvent::TryPark() { |
aoqi@0 | 4816 | for (;;) { |
aoqi@0 | 4817 | const int v = _Event; |
aoqi@0 | 4818 | guarantee ((v == 0) || (v == 1), "invariant"); |
aoqi@0 | 4819 | if (Atomic::cmpxchg (0, &_Event, v) == v) return v; |
aoqi@0 | 4820 | } |
aoqi@0 | 4821 | } |
aoqi@0 | 4822 | |
aoqi@0 | 4823 | void os::PlatformEvent::park() { // AKA "down()" |
aoqi@0 | 4824 | // Invariant: Only the thread associated with the Event/PlatformEvent |
aoqi@0 | 4825 | // may call park(). |
aoqi@0 | 4826 | // TODO: assert that _Assoc != NULL or _Assoc == Self |
aoqi@0 | 4827 | int v; |
aoqi@0 | 4828 | for (;;) { |
aoqi@0 | 4829 | v = _Event; |
aoqi@0 | 4830 | if (Atomic::cmpxchg (v-1, &_Event, v) == v) break; |
aoqi@0 | 4831 | } |
aoqi@0 | 4832 | guarantee (v >= 0, "invariant"); |
aoqi@0 | 4833 | if (v == 0) { |
aoqi@0 | 4834 | // Do this the hard way by blocking ... |
aoqi@0 | 4835 | int status = pthread_mutex_lock(_mutex); |
aoqi@0 | 4836 | assert_status(status == 0, status, "mutex_lock"); |
aoqi@0 | 4837 | guarantee (_nParked == 0, "invariant"); |
aoqi@0 | 4838 | ++ _nParked; |
aoqi@0 | 4839 | while (_Event < 0) { |
aoqi@0 | 4840 | status = pthread_cond_wait(_cond, _mutex); |
aoqi@0 | 4841 | assert_status(status == 0 || status == ETIMEDOUT, status, "cond_timedwait"); |
aoqi@0 | 4842 | } |
aoqi@0 | 4843 | -- _nParked; |
aoqi@0 | 4844 | |
aoqi@0 | 4845 | // In theory we could move the ST of 0 into _Event past the unlock(), |
aoqi@0 | 4846 | // but then we'd need a MEMBAR after the ST. |
aoqi@0 | 4847 | _Event = 0; |
aoqi@0 | 4848 | status = pthread_mutex_unlock(_mutex); |
aoqi@0 | 4849 | assert_status(status == 0, status, "mutex_unlock"); |
aoqi@0 | 4850 | } |
aoqi@0 | 4851 | guarantee (_Event >= 0, "invariant"); |
aoqi@0 | 4852 | } |
aoqi@0 | 4853 | |
aoqi@0 | 4854 | int os::PlatformEvent::park(jlong millis) { |
aoqi@0 | 4855 | guarantee (_nParked == 0, "invariant"); |
aoqi@0 | 4856 | |
aoqi@0 | 4857 | int v; |
aoqi@0 | 4858 | for (;;) { |
aoqi@0 | 4859 | v = _Event; |
aoqi@0 | 4860 | if (Atomic::cmpxchg (v-1, &_Event, v) == v) break; |
aoqi@0 | 4861 | } |
aoqi@0 | 4862 | guarantee (v >= 0, "invariant"); |
aoqi@0 | 4863 | if (v != 0) return OS_OK; |
aoqi@0 | 4864 | |
aoqi@0 | 4865 | // We do this the hard way, by blocking the thread. |
aoqi@0 | 4866 | // Consider enforcing a minimum timeout value. |
aoqi@0 | 4867 | struct timespec abst; |
aoqi@0 | 4868 | compute_abstime(&abst, millis); |
aoqi@0 | 4869 | |
aoqi@0 | 4870 | int ret = OS_TIMEOUT; |
aoqi@0 | 4871 | int status = pthread_mutex_lock(_mutex); |
aoqi@0 | 4872 | assert_status(status == 0, status, "mutex_lock"); |
aoqi@0 | 4873 | guarantee (_nParked == 0, "invariant"); |
aoqi@0 | 4874 | ++_nParked; |
aoqi@0 | 4875 | |
aoqi@0 | 4876 | // Object.wait(timo) will return because of |
aoqi@0 | 4877 | // (a) notification |
aoqi@0 | 4878 | // (b) timeout |
aoqi@0 | 4879 | // (c) thread.interrupt |
aoqi@0 | 4880 | // |
aoqi@0 | 4881 | // Thread.interrupt and object.notify{All} both call Event::set. |
aoqi@0 | 4882 | // That is, we treat thread.interrupt as a special case of notification. |
aoqi@0 | 4883 | // The underlying Solaris implementation, cond_timedwait, admits |
aoqi@0 | 4884 | // spurious/premature wakeups, but the JLS/JVM spec prevents the |
aoqi@0 | 4885 | // JVM from making those visible to Java code. As such, we must |
aoqi@0 | 4886 | // filter out spurious wakeups. We assume all ETIME returns are valid. |
aoqi@0 | 4887 | // |
aoqi@0 | 4888 | // TODO: properly differentiate simultaneous notify+interrupt. |
aoqi@0 | 4889 | // In that case, we should propagate the notify to another waiter. |
aoqi@0 | 4890 | |
aoqi@0 | 4891 | while (_Event < 0) { |
aoqi@0 | 4892 | status = pthread_cond_timedwait(_cond, _mutex, &abst); |
aoqi@0 | 4893 | assert_status(status == 0 || status == ETIMEDOUT, |
goetz@7424 | 4894 | status, "cond_timedwait"); |
aoqi@0 | 4895 | if (!FilterSpuriousWakeups) break; // previous semantics |
aoqi@0 | 4896 | if (status == ETIMEDOUT) break; |
aoqi@0 | 4897 | // We consume and ignore EINTR and spurious wakeups. |
aoqi@0 | 4898 | } |
aoqi@0 | 4899 | --_nParked; |
aoqi@0 | 4900 | if (_Event >= 0) { |
aoqi@0 | 4901 | ret = OS_OK; |
aoqi@0 | 4902 | } |
aoqi@0 | 4903 | _Event = 0; |
aoqi@0 | 4904 | status = pthread_mutex_unlock(_mutex); |
aoqi@0 | 4905 | assert_status(status == 0, status, "mutex_unlock"); |
aoqi@0 | 4906 | assert (_nParked == 0, "invariant"); |
aoqi@0 | 4907 | return ret; |
aoqi@0 | 4908 | } |
aoqi@0 | 4909 | |
aoqi@0 | 4910 | void os::PlatformEvent::unpark() { |
aoqi@0 | 4911 | int v, AnyWaiters; |
aoqi@0 | 4912 | for (;;) { |
aoqi@0 | 4913 | v = _Event; |
aoqi@0 | 4914 | if (v > 0) { |
aoqi@0 | 4915 | // The LD of _Event could have reordered or be satisfied |
aoqi@0 | 4916 | // by a read-aside from this processor's write buffer. |
aoqi@0 | 4917 | // To avoid problems execute a barrier and then |
aoqi@0 | 4918 | // ratify the value. |
aoqi@0 | 4919 | OrderAccess::fence(); |
aoqi@0 | 4920 | if (_Event == v) return; |
aoqi@0 | 4921 | continue; |
aoqi@0 | 4922 | } |
aoqi@0 | 4923 | if (Atomic::cmpxchg (v+1, &_Event, v) == v) break; |
aoqi@0 | 4924 | } |
aoqi@0 | 4925 | if (v < 0) { |
aoqi@0 | 4926 | // Wait for the thread associated with the event to vacate |
aoqi@0 | 4927 | int status = pthread_mutex_lock(_mutex); |
aoqi@0 | 4928 | assert_status(status == 0, status, "mutex_lock"); |
aoqi@0 | 4929 | AnyWaiters = _nParked; |
aoqi@0 | 4930 | |
aoqi@0 | 4931 | if (AnyWaiters != 0) { |
aoqi@0 | 4932 | // We intentional signal *after* dropping the lock |
aoqi@0 | 4933 | // to avoid a common class of futile wakeups. |
aoqi@0 | 4934 | status = pthread_cond_signal(_cond); |
aoqi@0 | 4935 | assert_status(status == 0, status, "cond_signal"); |
aoqi@0 | 4936 | } |
aoqi@0 | 4937 | // Mutex should be locked for pthread_cond_signal(_cond). |
aoqi@0 | 4938 | status = pthread_mutex_unlock(_mutex); |
aoqi@0 | 4939 | assert_status(status == 0, status, "mutex_unlock"); |
aoqi@0 | 4940 | } |
aoqi@0 | 4941 | |
aoqi@0 | 4942 | // Note that we signal() _after dropping the lock for "immortal" Events. |
aoqi@0 | 4943 | // This is safe and avoids a common class of futile wakeups. In rare |
aoqi@0 | 4944 | // circumstances this can cause a thread to return prematurely from |
aoqi@0 | 4945 | // cond_{timed}wait() but the spurious wakeup is benign and the victim will |
aoqi@0 | 4946 | // simply re-test the condition and re-park itself. |
aoqi@0 | 4947 | } |
aoqi@0 | 4948 | |
aoqi@0 | 4949 | |
aoqi@0 | 4950 | // JSR166 |
aoqi@0 | 4951 | // ------------------------------------------------------- |
aoqi@0 | 4952 | |
aoqi@0 | 4953 | // |
aoqi@0 | 4954 | // The solaris and linux implementations of park/unpark are fairly |
aoqi@0 | 4955 | // conservative for now, but can be improved. They currently use a |
aoqi@0 | 4956 | // mutex/condvar pair, plus a a count. |
aoqi@0 | 4957 | // Park decrements count if > 0, else does a condvar wait. Unpark |
aoqi@0 | 4958 | // sets count to 1 and signals condvar. Only one thread ever waits |
aoqi@0 | 4959 | // on the condvar. Contention seen when trying to park implies that someone |
aoqi@0 | 4960 | // is unparking you, so don't wait. And spurious returns are fine, so there |
aoqi@0 | 4961 | // is no need to track notifications. |
aoqi@0 | 4962 | // |
aoqi@0 | 4963 | |
aoqi@0 | 4964 | #define MAX_SECS 100000000 |
aoqi@0 | 4965 | // |
aoqi@0 | 4966 | // This code is common to linux and solaris and will be moved to a |
aoqi@0 | 4967 | // common place in dolphin. |
aoqi@0 | 4968 | // |
aoqi@0 | 4969 | // The passed in time value is either a relative time in nanoseconds |
aoqi@0 | 4970 | // or an absolute time in milliseconds. Either way it has to be unpacked |
aoqi@0 | 4971 | // into suitable seconds and nanoseconds components and stored in the |
aoqi@0 | 4972 | // given timespec structure. |
aoqi@0 | 4973 | // Given time is a 64-bit value and the time_t used in the timespec is only |
aoqi@0 | 4974 | // a signed-32-bit value (except on 64-bit Linux) we have to watch for |
aoqi@0 | 4975 | // overflow if times way in the future are given. Further on Solaris versions |
aoqi@0 | 4976 | // prior to 10 there is a restriction (see cond_timedwait) that the specified |
aoqi@0 | 4977 | // number of seconds, in abstime, is less than current_time + 100,000,000. |
aoqi@0 | 4978 | // As it will be 28 years before "now + 100000000" will overflow we can |
aoqi@0 | 4979 | // ignore overflow and just impose a hard-limit on seconds using the value |
aoqi@0 | 4980 | // of "now + 100,000,000". This places a limit on the timeout of about 3.17 |
aoqi@0 | 4981 | // years from "now". |
aoqi@0 | 4982 | // |
aoqi@0 | 4983 | |
aoqi@0 | 4984 | static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { |
aoqi@0 | 4985 | assert (time > 0, "convertTime"); |
aoqi@0 | 4986 | |
aoqi@0 | 4987 | struct timeval now; |
aoqi@0 | 4988 | int status = gettimeofday(&now, NULL); |
aoqi@0 | 4989 | assert(status == 0, "gettimeofday"); |
aoqi@0 | 4990 | |
aoqi@0 | 4991 | time_t max_secs = now.tv_sec + MAX_SECS; |
aoqi@0 | 4992 | |
aoqi@0 | 4993 | if (isAbsolute) { |
aoqi@0 | 4994 | jlong secs = time / 1000; |
aoqi@0 | 4995 | if (secs > max_secs) { |
aoqi@0 | 4996 | absTime->tv_sec = max_secs; |
aoqi@0 | 4997 | } |
aoqi@0 | 4998 | else { |
aoqi@0 | 4999 | absTime->tv_sec = secs; |
aoqi@0 | 5000 | } |
aoqi@0 | 5001 | absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; |
aoqi@0 | 5002 | } |
aoqi@0 | 5003 | else { |
aoqi@0 | 5004 | jlong secs = time / NANOSECS_PER_SEC; |
aoqi@0 | 5005 | if (secs >= MAX_SECS) { |
aoqi@0 | 5006 | absTime->tv_sec = max_secs; |
aoqi@0 | 5007 | absTime->tv_nsec = 0; |
aoqi@0 | 5008 | } |
aoqi@0 | 5009 | else { |
aoqi@0 | 5010 | absTime->tv_sec = now.tv_sec + secs; |
aoqi@0 | 5011 | absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; |
aoqi@0 | 5012 | if (absTime->tv_nsec >= NANOSECS_PER_SEC) { |
aoqi@0 | 5013 | absTime->tv_nsec -= NANOSECS_PER_SEC; |
aoqi@0 | 5014 | ++absTime->tv_sec; // note: this must be <= max_secs |
aoqi@0 | 5015 | } |
aoqi@0 | 5016 | } |
aoqi@0 | 5017 | } |
aoqi@0 | 5018 | assert(absTime->tv_sec >= 0, "tv_sec < 0"); |
aoqi@0 | 5019 | assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); |
aoqi@0 | 5020 | assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); |
aoqi@0 | 5021 | assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); |
aoqi@0 | 5022 | } |
aoqi@0 | 5023 | |
aoqi@0 | 5024 | void Parker::park(bool isAbsolute, jlong time) { |
aoqi@0 | 5025 | // Optional fast-path check: |
aoqi@0 | 5026 | // Return immediately if a permit is available. |
aoqi@0 | 5027 | if (_counter > 0) { |
goetz@7424 | 5028 | _counter = 0; |
goetz@7424 | 5029 | OrderAccess::fence(); |
goetz@7424 | 5030 | return; |
aoqi@0 | 5031 | } |
aoqi@0 | 5032 | |
aoqi@0 | 5033 | Thread* thread = Thread::current(); |
aoqi@0 | 5034 | assert(thread->is_Java_thread(), "Must be JavaThread"); |
aoqi@0 | 5035 | JavaThread *jt = (JavaThread *)thread; |
aoqi@0 | 5036 | |
aoqi@0 | 5037 | // Optional optimization -- avoid state transitions if there's an interrupt pending. |
aoqi@0 | 5038 | // Check interrupt before trying to wait |
aoqi@0 | 5039 | if (Thread::is_interrupted(thread, false)) { |
aoqi@0 | 5040 | return; |
aoqi@0 | 5041 | } |
aoqi@0 | 5042 | |
aoqi@0 | 5043 | // Next, demultiplex/decode time arguments |
aoqi@0 | 5044 | timespec absTime; |
aoqi@0 | 5045 | if (time < 0 || (isAbsolute && time == 0)) { // don't wait at all |
aoqi@0 | 5046 | return; |
aoqi@0 | 5047 | } |
aoqi@0 | 5048 | if (time > 0) { |
aoqi@0 | 5049 | unpackTime(&absTime, isAbsolute, time); |
aoqi@0 | 5050 | } |
aoqi@0 | 5051 | |
aoqi@0 | 5052 | // Enter safepoint region |
aoqi@0 | 5053 | // Beware of deadlocks such as 6317397. |
aoqi@0 | 5054 | // The per-thread Parker:: mutex is a classic leaf-lock. |
aoqi@0 | 5055 | // In particular a thread must never block on the Threads_lock while |
aoqi@0 | 5056 | // holding the Parker:: mutex. If safepoints are pending both the |
aoqi@0 | 5057 | // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. |
aoqi@0 | 5058 | ThreadBlockInVM tbivm(jt); |
aoqi@0 | 5059 | |
aoqi@0 | 5060 | // Don't wait if cannot get lock since interference arises from |
aoqi@0 | 5061 | // unblocking. Also. check interrupt before trying wait |
aoqi@0 | 5062 | if (Thread::is_interrupted(thread, false) || pthread_mutex_trylock(_mutex) != 0) { |
aoqi@0 | 5063 | return; |
aoqi@0 | 5064 | } |
aoqi@0 | 5065 | |
aoqi@0 | 5066 | int status; |
aoqi@0 | 5067 | if (_counter > 0) { // no wait needed |
aoqi@0 | 5068 | _counter = 0; |
aoqi@0 | 5069 | status = pthread_mutex_unlock(_mutex); |
aoqi@0 | 5070 | assert (status == 0, "invariant"); |
aoqi@0 | 5071 | OrderAccess::fence(); |
aoqi@0 | 5072 | return; |
aoqi@0 | 5073 | } |
aoqi@0 | 5074 | |
aoqi@0 | 5075 | #ifdef ASSERT |
aoqi@0 | 5076 | // Don't catch signals while blocked; let the running threads have the signals. |
aoqi@0 | 5077 | // (This allows a debugger to break into the running thread.) |
aoqi@0 | 5078 | sigset_t oldsigs; |
aoqi@0 | 5079 | sigset_t* allowdebug_blocked = os::Aix::allowdebug_blocked_signals(); |
aoqi@0 | 5080 | pthread_sigmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); |
aoqi@0 | 5081 | #endif |
aoqi@0 | 5082 | |
aoqi@0 | 5083 | OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); |
aoqi@0 | 5084 | jt->set_suspend_equivalent(); |
aoqi@0 | 5085 | // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() |
aoqi@0 | 5086 | |
aoqi@0 | 5087 | if (time == 0) { |
aoqi@0 | 5088 | status = pthread_cond_wait (_cond, _mutex); |
aoqi@0 | 5089 | } else { |
aoqi@0 | 5090 | status = pthread_cond_timedwait (_cond, _mutex, &absTime); |
aoqi@0 | 5091 | if (status != 0 && WorkAroundNPTLTimedWaitHang) { |
aoqi@0 | 5092 | pthread_cond_destroy (_cond); |
aoqi@0 | 5093 | pthread_cond_init (_cond, NULL); |
aoqi@0 | 5094 | } |
aoqi@0 | 5095 | } |
aoqi@0 | 5096 | assert_status(status == 0 || status == EINTR || |
aoqi@0 | 5097 | status == ETIME || status == ETIMEDOUT, |
aoqi@0 | 5098 | status, "cond_timedwait"); |
aoqi@0 | 5099 | |
aoqi@0 | 5100 | #ifdef ASSERT |
aoqi@0 | 5101 | pthread_sigmask(SIG_SETMASK, &oldsigs, NULL); |
aoqi@0 | 5102 | #endif |
aoqi@0 | 5103 | |
aoqi@0 | 5104 | _counter = 0; |
aoqi@0 | 5105 | status = pthread_mutex_unlock(_mutex); |
aoqi@0 | 5106 | assert_status(status == 0, status, "invariant"); |
aoqi@0 | 5107 | // If externally suspended while waiting, re-suspend |
aoqi@0 | 5108 | if (jt->handle_special_suspend_equivalent_condition()) { |
aoqi@0 | 5109 | jt->java_suspend_self(); |
aoqi@0 | 5110 | } |
aoqi@0 | 5111 | |
aoqi@0 | 5112 | OrderAccess::fence(); |
aoqi@0 | 5113 | } |
aoqi@0 | 5114 | |
aoqi@0 | 5115 | void Parker::unpark() { |
aoqi@0 | 5116 | int s, status; |
aoqi@0 | 5117 | status = pthread_mutex_lock(_mutex); |
aoqi@0 | 5118 | assert (status == 0, "invariant"); |
aoqi@0 | 5119 | s = _counter; |
aoqi@0 | 5120 | _counter = 1; |
aoqi@0 | 5121 | if (s < 1) { |
aoqi@0 | 5122 | if (WorkAroundNPTLTimedWaitHang) { |
aoqi@0 | 5123 | status = pthread_cond_signal (_cond); |
aoqi@0 | 5124 | assert (status == 0, "invariant"); |
aoqi@0 | 5125 | status = pthread_mutex_unlock(_mutex); |
aoqi@0 | 5126 | assert (status == 0, "invariant"); |
aoqi@0 | 5127 | } else { |
aoqi@0 | 5128 | status = pthread_mutex_unlock(_mutex); |
aoqi@0 | 5129 | assert (status == 0, "invariant"); |
aoqi@0 | 5130 | status = pthread_cond_signal (_cond); |
aoqi@0 | 5131 | assert (status == 0, "invariant"); |
aoqi@0 | 5132 | } |
aoqi@0 | 5133 | } else { |
aoqi@0 | 5134 | pthread_mutex_unlock(_mutex); |
aoqi@0 | 5135 | assert (status == 0, "invariant"); |
aoqi@0 | 5136 | } |
aoqi@0 | 5137 | } |
aoqi@0 | 5138 | |
aoqi@0 | 5139 | extern char** environ; |
aoqi@0 | 5140 | |
aoqi@0 | 5141 | // Run the specified command in a separate process. Return its exit value, |
aoqi@0 | 5142 | // or -1 on failure (e.g. can't fork a new process). |
aoqi@0 | 5143 | // Unlike system(), this function can be called from signal handler. It |
aoqi@0 | 5144 | // doesn't block SIGINT et al. |
aoqi@0 | 5145 | int os::fork_and_exec(char* cmd) { |
aoqi@0 | 5146 | char * argv[4] = {"sh", "-c", cmd, NULL}; |
aoqi@0 | 5147 | |
aoqi@0 | 5148 | pid_t pid = fork(); |
aoqi@0 | 5149 | |
aoqi@0 | 5150 | if (pid < 0) { |
aoqi@0 | 5151 | // fork failed |
aoqi@0 | 5152 | return -1; |
aoqi@0 | 5153 | |
aoqi@0 | 5154 | } else if (pid == 0) { |
aoqi@0 | 5155 | // child process |
aoqi@0 | 5156 | |
goetz@7424 | 5157 | // Try to be consistent with system(), which uses "/usr/bin/sh" on AIX. |
aoqi@0 | 5158 | execve("/usr/bin/sh", argv, environ); |
aoqi@0 | 5159 | |
aoqi@0 | 5160 | // execve failed |
aoqi@0 | 5161 | _exit(-1); |
aoqi@0 | 5162 | |
goetz@7424 | 5163 | } else { |
aoqi@0 | 5164 | // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't |
aoqi@0 | 5165 | // care about the actual exit code, for now. |
aoqi@0 | 5166 | |
aoqi@0 | 5167 | int status; |
aoqi@0 | 5168 | |
goetz@7424 | 5169 | // Wait for the child process to exit. This returns immediately if |
aoqi@0 | 5170 | // the child has already exited. */ |
aoqi@0 | 5171 | while (waitpid(pid, &status, 0) < 0) { |
goetz@7424 | 5172 | switch (errno) { |
aoqi@0 | 5173 | case ECHILD: return 0; |
aoqi@0 | 5174 | case EINTR: break; |
aoqi@0 | 5175 | default: return -1; |
goetz@7424 | 5176 | } |
aoqi@0 | 5177 | } |
aoqi@0 | 5178 | |
aoqi@0 | 5179 | if (WIFEXITED(status)) { |
goetz@7424 | 5180 | // The child exited normally; get its exit code. |
goetz@7424 | 5181 | return WEXITSTATUS(status); |
aoqi@0 | 5182 | } else if (WIFSIGNALED(status)) { |
goetz@7424 | 5183 | // The child exited because of a signal. |
goetz@7424 | 5184 | // The best value to return is 0x80 + signal number, |
goetz@7424 | 5185 | // because that is what all Unix shells do, and because |
goetz@7424 | 5186 | // it allows callers to distinguish between process exit and |
goetz@7424 | 5187 | // process death by signal. |
goetz@7424 | 5188 | return 0x80 + WTERMSIG(status); |
aoqi@0 | 5189 | } else { |
goetz@7424 | 5190 | // Unknown exit code; pass it through. |
goetz@7424 | 5191 | return status; |
aoqi@0 | 5192 | } |
aoqi@0 | 5193 | } |
aoqi@0 | 5194 | return -1; |
aoqi@0 | 5195 | } |
aoqi@0 | 5196 | |
aoqi@0 | 5197 | // is_headless_jre() |
aoqi@0 | 5198 | // |
aoqi@0 | 5199 | // Test for the existence of xawt/libmawt.so or libawt_xawt.so |
aoqi@0 | 5200 | // in order to report if we are running in a headless jre. |
aoqi@0 | 5201 | // |
aoqi@0 | 5202 | // Since JDK8 xawt/libmawt.so is moved into the same directory |
aoqi@0 | 5203 | // as libawt.so, and renamed libawt_xawt.so |
aoqi@0 | 5204 | bool os::is_headless_jre() { |
aoqi@0 | 5205 | struct stat statbuf; |
aoqi@0 | 5206 | char buf[MAXPATHLEN]; |
aoqi@0 | 5207 | char libmawtpath[MAXPATHLEN]; |
goetz@7424 | 5208 | const char *xawtstr = "/xawt/libmawt.so"; |
aoqi@0 | 5209 | const char *new_xawtstr = "/libawt_xawt.so"; |
aoqi@0 | 5210 | |
aoqi@0 | 5211 | char *p; |
aoqi@0 | 5212 | |
aoqi@0 | 5213 | // Get path to libjvm.so |
aoqi@0 | 5214 | os::jvm_path(buf, sizeof(buf)); |
aoqi@0 | 5215 | |
aoqi@0 | 5216 | // Get rid of libjvm.so |
aoqi@0 | 5217 | p = strrchr(buf, '/'); |
aoqi@0 | 5218 | if (p == NULL) return false; |
aoqi@0 | 5219 | else *p = '\0'; |
aoqi@0 | 5220 | |
aoqi@0 | 5221 | // Get rid of client or server |
aoqi@0 | 5222 | p = strrchr(buf, '/'); |
aoqi@0 | 5223 | if (p == NULL) return false; |
aoqi@0 | 5224 | else *p = '\0'; |
aoqi@0 | 5225 | |
aoqi@0 | 5226 | // check xawt/libmawt.so |
aoqi@0 | 5227 | strcpy(libmawtpath, buf); |
aoqi@0 | 5228 | strcat(libmawtpath, xawtstr); |
aoqi@0 | 5229 | if (::stat(libmawtpath, &statbuf) == 0) return false; |
aoqi@0 | 5230 | |
aoqi@0 | 5231 | // check libawt_xawt.so |
aoqi@0 | 5232 | strcpy(libmawtpath, buf); |
aoqi@0 | 5233 | strcat(libmawtpath, new_xawtstr); |
aoqi@0 | 5234 | if (::stat(libmawtpath, &statbuf) == 0) return false; |
aoqi@0 | 5235 | |
aoqi@0 | 5236 | return true; |
aoqi@0 | 5237 | } |
aoqi@0 | 5238 | |
aoqi@0 | 5239 | // Get the default path to the core file |
aoqi@0 | 5240 | // Returns the length of the string |
aoqi@0 | 5241 | int os::get_core_path(char* buffer, size_t bufferSize) { |
aoqi@0 | 5242 | const char* p = get_current_directory(buffer, bufferSize); |
aoqi@0 | 5243 | |
aoqi@0 | 5244 | if (p == NULL) { |
aoqi@0 | 5245 | assert(p != NULL, "failed to get current directory"); |
aoqi@0 | 5246 | return 0; |
aoqi@0 | 5247 | } |
aoqi@0 | 5248 | |
aoqi@0 | 5249 | return strlen(buffer); |
aoqi@0 | 5250 | } |
aoqi@0 | 5251 | |
aoqi@0 | 5252 | #ifndef PRODUCT |
aoqi@0 | 5253 | void TestReserveMemorySpecial_test() { |
aoqi@0 | 5254 | // No tests available for this platform |
aoqi@0 | 5255 | } |
aoqi@0 | 5256 | #endif |