aoqi@0: /* aoqi@0: * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. aoqi@0: * Copyright 2012, 2014 SAP AG. All rights reserved. aoqi@0: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. aoqi@0: * aoqi@0: * This code is free software; you can redistribute it and/or modify it aoqi@0: * under the terms of the GNU General Public License version 2 only, as aoqi@0: * published by the Free Software Foundation. aoqi@0: * aoqi@0: * This code is distributed in the hope that it will be useful, but WITHOUT aoqi@0: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or aoqi@0: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License aoqi@0: * version 2 for more details (a copy is included in the LICENSE file that aoqi@0: * accompanied this code). aoqi@0: * aoqi@0: * You should have received a copy of the GNU General Public License version aoqi@0: * 2 along with this work; if not, write to the Free Software Foundation, aoqi@0: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. aoqi@0: * aoqi@0: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA aoqi@0: * or visit www.oracle.com if you need additional information or have any aoqi@0: * questions. aoqi@0: * aoqi@0: */ aoqi@0: aoqi@0: // According to the AIX OS doc #pragma alloca must be used aoqi@0: // with C++ compiler before referencing the function alloca() aoqi@0: #pragma alloca aoqi@0: aoqi@0: // no precompiled headers aoqi@0: #include "classfile/classLoader.hpp" aoqi@0: #include "classfile/systemDictionary.hpp" aoqi@0: #include "classfile/vmSymbols.hpp" aoqi@0: #include "code/icBuffer.hpp" aoqi@0: #include "code/vtableStubs.hpp" aoqi@0: #include "compiler/compileBroker.hpp" aoqi@0: #include "interpreter/interpreter.hpp" aoqi@0: #include "jvm_aix.h" aoqi@0: #include "libperfstat_aix.hpp" aoqi@0: #include "loadlib_aix.hpp" aoqi@0: #include "memory/allocation.inline.hpp" aoqi@0: #include "memory/filemap.hpp" aoqi@0: #include "mutex_aix.inline.hpp" aoqi@0: #include "oops/oop.inline.hpp" aoqi@0: #include "os_share_aix.hpp" aoqi@0: #include "porting_aix.hpp" aoqi@0: #include "prims/jniFastGetField.hpp" aoqi@0: #include "prims/jvm.h" aoqi@0: #include "prims/jvm_misc.hpp" aoqi@0: #include "runtime/arguments.hpp" aoqi@0: #include "runtime/extendedPC.hpp" aoqi@0: #include "runtime/globals.hpp" aoqi@0: #include "runtime/interfaceSupport.hpp" aoqi@0: #include "runtime/java.hpp" aoqi@0: #include "runtime/javaCalls.hpp" aoqi@0: #include "runtime/mutexLocker.hpp" aoqi@0: #include "runtime/objectMonitor.hpp" aoqi@0: #include "runtime/osThread.hpp" aoqi@0: #include "runtime/perfMemory.hpp" aoqi@0: #include "runtime/sharedRuntime.hpp" aoqi@0: #include "runtime/statSampler.hpp" aoqi@0: #include "runtime/stubRoutines.hpp" aoqi@0: #include "runtime/thread.inline.hpp" aoqi@0: #include "runtime/threadCritical.hpp" aoqi@0: #include "runtime/timer.hpp" aoqi@0: #include "services/attachListener.hpp" aoqi@0: #include "services/runtimeService.hpp" aoqi@0: #include "utilities/decoder.hpp" aoqi@0: #include "utilities/defaultStream.hpp" aoqi@0: #include "utilities/events.hpp" aoqi@0: #include "utilities/growableArray.hpp" aoqi@0: #include "utilities/vmError.hpp" aoqi@0: aoqi@0: // put OS-includes here (sorted alphabetically) aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: #include aoqi@0: aoqi@0: // Add missing declarations (should be in procinfo.h but isn't until AIX 6.1). aoqi@0: #if !defined(_AIXVERSION_610) aoqi@0: extern "C" { aoqi@0: int getthrds64(pid_t ProcessIdentifier, aoqi@0: struct thrdentry64* ThreadBuffer, aoqi@0: int ThreadSize, aoqi@0: tid64_t* IndexPointer, aoqi@0: int Count); aoqi@0: } aoqi@0: #endif aoqi@0: aoqi@0: // Excerpts from systemcfg.h definitions newer than AIX 5.3 aoqi@0: #ifndef PV_7 aoqi@0: # define PV_7 0x200000 // Power PC 7 aoqi@0: # define PV_7_Compat 0x208000 // Power PC 7 aoqi@0: #endif aoqi@0: aoqi@0: #define MAX_PATH (2 * K) aoqi@0: aoqi@0: // for timer info max values which include all bits aoqi@0: #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) aoqi@0: // for multipage initialization error analysis (in 'g_multipage_error') aoqi@0: #define ERROR_MP_OS_TOO_OLD 100 aoqi@0: #define ERROR_MP_EXTSHM_ACTIVE 101 aoqi@0: #define ERROR_MP_VMGETINFO_FAILED 102 aoqi@0: #define ERROR_MP_VMGETINFO_CLAIMS_NO_SUPPORT_FOR_64K 103 aoqi@0: aoqi@0: // the semantics in this file are thus that codeptr_t is a *real code ptr* aoqi@0: // This means that any function taking codeptr_t as arguments will assume aoqi@0: // a real codeptr and won't handle function descriptors (eg getFuncName), aoqi@0: // whereas functions taking address as args will deal with function aoqi@0: // descriptors (eg os::dll_address_to_library_name) aoqi@0: typedef unsigned int* codeptr_t; aoqi@0: aoqi@0: // typedefs for stackslots, stack pointers, pointers to op codes aoqi@0: typedef unsigned long stackslot_t; aoqi@0: typedef stackslot_t* stackptr_t; aoqi@0: aoqi@0: // query dimensions of the stack of the calling thread aoqi@0: static void query_stack_dimensions(address* p_stack_base, size_t* p_stack_size); aoqi@0: aoqi@0: // function to check a given stack pointer against given stack limits aoqi@0: inline bool is_valid_stackpointer(stackptr_t sp, stackptr_t stack_base, size_t stack_size) { aoqi@0: if (((uintptr_t)sp) & 0x7) { aoqi@0: return false; aoqi@0: } aoqi@0: if (sp > stack_base) { aoqi@0: return false; aoqi@0: } aoqi@0: if (sp < (stackptr_t) ((address)stack_base - stack_size)) { aoqi@0: return false; aoqi@0: } aoqi@0: return true; aoqi@0: } aoqi@0: aoqi@0: // returns true if function is a valid codepointer aoqi@0: inline bool is_valid_codepointer(codeptr_t p) { aoqi@0: if (!p) { aoqi@0: return false; aoqi@0: } aoqi@0: if (((uintptr_t)p) & 0x3) { aoqi@0: return false; aoqi@0: } aoqi@0: if (LoadedLibraries::find_for_text_address((address)p) == NULL) { aoqi@0: return false; aoqi@0: } aoqi@0: return true; aoqi@0: } aoqi@0: aoqi@0: // macro to check a given stack pointer against given stack limits and to die if test fails aoqi@0: #define CHECK_STACK_PTR(sp, stack_base, stack_size) { \ aoqi@0: guarantee(is_valid_stackpointer((stackptr_t)(sp), (stackptr_t)(stack_base), stack_size), "Stack Pointer Invalid"); \ aoqi@0: } aoqi@0: aoqi@0: // macro to check the current stack pointer against given stacklimits aoqi@0: #define CHECK_CURRENT_STACK_PTR(stack_base, stack_size) { \ aoqi@0: address sp; \ aoqi@0: sp = os::current_stack_pointer(); \ aoqi@0: CHECK_STACK_PTR(sp, stack_base, stack_size); \ aoqi@0: } aoqi@0: aoqi@0: //////////////////////////////////////////////////////////////////////////////// aoqi@0: // global variables (for a description see os_aix.hpp) aoqi@0: aoqi@0: julong os::Aix::_physical_memory = 0; aoqi@0: pthread_t os::Aix::_main_thread = ((pthread_t)0); aoqi@0: int os::Aix::_page_size = -1; aoqi@0: int os::Aix::_on_pase = -1; aoqi@0: int os::Aix::_os_version = -1; aoqi@0: int os::Aix::_stack_page_size = -1; aoqi@0: size_t os::Aix::_shm_default_page_size = -1; aoqi@0: int os::Aix::_can_use_64K_pages = -1; aoqi@0: int os::Aix::_can_use_16M_pages = -1; aoqi@0: int os::Aix::_xpg_sus_mode = -1; aoqi@0: int os::Aix::_extshm = -1; aoqi@0: int os::Aix::_logical_cpus = -1; aoqi@0: aoqi@0: //////////////////////////////////////////////////////////////////////////////// aoqi@0: // local variables aoqi@0: aoqi@0: static int g_multipage_error = -1; // error analysis for multipage initialization aoqi@0: static jlong initial_time_count = 0; aoqi@0: static int clock_tics_per_sec = 100; aoqi@0: static sigset_t check_signal_done; // For diagnostics to print a message once (see run_periodic_checks) aoqi@0: static bool check_signals = true; aoqi@0: static pid_t _initial_pid = 0; aoqi@0: static int SR_signum = SIGUSR2; // Signal used to suspend/resume a thread (must be > SIGSEGV, see 4355769) aoqi@0: static sigset_t SR_sigset; aoqi@0: static pthread_mutex_t dl_mutex; // Used to protect dlsym() calls */ aoqi@0: aoqi@0: julong os::available_memory() { aoqi@0: return Aix::available_memory(); aoqi@0: } aoqi@0: aoqi@0: julong os::Aix::available_memory() { aoqi@0: os::Aix::meminfo_t mi; aoqi@0: if (os::Aix::get_meminfo(&mi)) { aoqi@0: return mi.real_free; aoqi@0: } else { aoqi@0: return 0xFFFFFFFFFFFFFFFFLL; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: julong os::physical_memory() { aoqi@0: return Aix::physical_memory(); aoqi@0: } aoqi@0: aoqi@0: //////////////////////////////////////////////////////////////////////////////// aoqi@0: // environment support aoqi@0: aoqi@0: bool os::getenv(const char* name, char* buf, int len) { aoqi@0: const char* val = ::getenv(name); aoqi@0: if (val != NULL && strlen(val) < (size_t)len) { aoqi@0: strcpy(buf, val); aoqi@0: return true; aoqi@0: } aoqi@0: if (len > 0) buf[0] = 0; // return a null string aoqi@0: return false; aoqi@0: } aoqi@0: aoqi@0: aoqi@0: // Return true if user is running as root. aoqi@0: aoqi@0: bool os::have_special_privileges() { aoqi@0: static bool init = false; aoqi@0: static bool privileges = false; aoqi@0: if (!init) { aoqi@0: privileges = (getuid() != geteuid()) || (getgid() != getegid()); aoqi@0: init = true; aoqi@0: } aoqi@0: return privileges; aoqi@0: } aoqi@0: aoqi@0: // Helper function, emulates disclaim64 using multiple 32bit disclaims aoqi@0: // because we cannot use disclaim64() on AS/400 and old AIX releases. aoqi@0: static bool my_disclaim64(char* addr, size_t size) { aoqi@0: aoqi@0: if (size == 0) { aoqi@0: return true; aoqi@0: } aoqi@0: aoqi@0: // Maximum size 32bit disclaim() accepts. (Theoretically 4GB, but I just do not trust that.) aoqi@0: const unsigned int maxDisclaimSize = 0x80000000; aoqi@0: aoqi@0: const unsigned int numFullDisclaimsNeeded = (size / maxDisclaimSize); aoqi@0: const unsigned int lastDisclaimSize = (size % maxDisclaimSize); aoqi@0: aoqi@0: char* p = addr; aoqi@0: aoqi@0: for (int i = 0; i < numFullDisclaimsNeeded; i ++) { aoqi@0: if (::disclaim(p, maxDisclaimSize, DISCLAIM_ZEROMEM) != 0) { aoqi@0: //if (Verbose) aoqi@0: fprintf(stderr, "Cannot disclaim %p - %p (errno %d)\n", p, p + maxDisclaimSize, errno); aoqi@0: return false; aoqi@0: } aoqi@0: p += maxDisclaimSize; aoqi@0: } aoqi@0: aoqi@0: if (lastDisclaimSize > 0) { aoqi@0: if (::disclaim(p, lastDisclaimSize, DISCLAIM_ZEROMEM) != 0) { aoqi@0: //if (Verbose) aoqi@0: fprintf(stderr, "Cannot disclaim %p - %p (errno %d)\n", p, p + lastDisclaimSize, errno); aoqi@0: return false; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: return true; aoqi@0: } aoqi@0: aoqi@0: // Cpu architecture string aoqi@0: #if defined(PPC32) aoqi@0: static char cpu_arch[] = "ppc"; aoqi@0: #elif defined(PPC64) aoqi@0: static char cpu_arch[] = "ppc64"; aoqi@0: #else aoqi@0: #error Add appropriate cpu_arch setting aoqi@0: #endif aoqi@0: aoqi@0: aoqi@0: // Given an address, returns the size of the page backing that address. aoqi@0: size_t os::Aix::query_pagesize(void* addr) { aoqi@0: aoqi@0: vm_page_info pi; aoqi@0: pi.addr = (uint64_t)addr; aoqi@0: if (::vmgetinfo(&pi, VM_PAGE_INFO, sizeof(pi)) == 0) { aoqi@0: return pi.pagesize; aoqi@0: } else { aoqi@0: fprintf(stderr, "vmgetinfo failed to retrieve page size for address %p (errno %d).\n", addr, errno); aoqi@0: assert(false, "vmgetinfo failed to retrieve page size"); aoqi@0: return SIZE_4K; aoqi@0: } aoqi@0: aoqi@0: } aoqi@0: aoqi@0: // Returns the kernel thread id of the currently running thread. aoqi@0: pid_t os::Aix::gettid() { aoqi@0: return (pid_t) thread_self(); aoqi@0: } aoqi@0: aoqi@0: void os::Aix::initialize_system_info() { aoqi@0: aoqi@0: // get the number of online(logical) cpus instead of configured aoqi@0: os::_processor_count = sysconf(_SC_NPROCESSORS_ONLN); aoqi@0: assert(_processor_count > 0, "_processor_count must be > 0"); aoqi@0: aoqi@0: // retrieve total physical storage aoqi@0: os::Aix::meminfo_t mi; aoqi@0: if (!os::Aix::get_meminfo(&mi)) { aoqi@0: fprintf(stderr, "os::Aix::get_meminfo failed.\n"); fflush(stderr); aoqi@0: assert(false, "os::Aix::get_meminfo failed."); aoqi@0: } aoqi@0: _physical_memory = (julong) mi.real_total; aoqi@0: } aoqi@0: aoqi@0: // Helper function for tracing page sizes. aoqi@0: static const char* describe_pagesize(size_t pagesize) { aoqi@0: switch (pagesize) { aoqi@0: case SIZE_4K : return "4K"; aoqi@0: case SIZE_64K: return "64K"; aoqi@0: case SIZE_16M: return "16M"; aoqi@0: case SIZE_16G: return "16G"; aoqi@0: default: aoqi@0: assert(false, "surprise"); aoqi@0: return "??"; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // Retrieve information about multipage size support. Will initialize aoqi@0: // Aix::_page_size, Aix::_stack_page_size, Aix::_can_use_64K_pages, aoqi@0: // Aix::_can_use_16M_pages. aoqi@0: // Must be called before calling os::large_page_init(). aoqi@0: void os::Aix::query_multipage_support() { aoqi@0: aoqi@0: guarantee(_page_size == -1 && aoqi@0: _stack_page_size == -1 && aoqi@0: _can_use_64K_pages == -1 && aoqi@0: _can_use_16M_pages == -1 && aoqi@0: g_multipage_error == -1, aoqi@0: "do not call twice"); aoqi@0: aoqi@0: _page_size = ::sysconf(_SC_PAGESIZE); aoqi@0: aoqi@0: // This really would surprise me. aoqi@0: assert(_page_size == SIZE_4K, "surprise!"); aoqi@0: aoqi@0: aoqi@0: // Query default data page size (default page size for C-Heap, pthread stacks and .bss). aoqi@0: // Default data page size is influenced either by linker options (-bdatapsize) aoqi@0: // or by environment variable LDR_CNTRL (suboption DATAPSIZE). If none is given, aoqi@0: // default should be 4K. aoqi@0: size_t data_page_size = SIZE_4K; aoqi@0: { aoqi@0: void* p = ::malloc(SIZE_16M); aoqi@0: guarantee(p != NULL, "malloc failed"); aoqi@0: data_page_size = os::Aix::query_pagesize(p); aoqi@0: ::free(p); aoqi@0: } aoqi@0: aoqi@0: // query default shm page size (LDR_CNTRL SHMPSIZE) aoqi@0: { aoqi@0: const int shmid = ::shmget(IPC_PRIVATE, 1, IPC_CREAT | S_IRUSR | S_IWUSR); aoqi@0: guarantee(shmid != -1, "shmget failed"); aoqi@0: void* p = ::shmat(shmid, NULL, 0); aoqi@0: ::shmctl(shmid, IPC_RMID, NULL); aoqi@0: guarantee(p != (void*) -1, "shmat failed"); aoqi@0: _shm_default_page_size = os::Aix::query_pagesize(p); aoqi@0: ::shmdt(p); aoqi@0: } aoqi@0: aoqi@0: // before querying the stack page size, make sure we are not running as primordial aoqi@0: // thread (because primordial thread's stack may have different page size than aoqi@0: // pthread thread stacks). Running a VM on the primordial thread won't work for a aoqi@0: // number of reasons so we may just as well guarantee it here aoqi@0: guarantee(!os::Aix::is_primordial_thread(), "Must not be called for primordial thread"); aoqi@0: aoqi@0: // query stack page size aoqi@0: { aoqi@0: int dummy = 0; aoqi@0: _stack_page_size = os::Aix::query_pagesize(&dummy); aoqi@0: // everything else would surprise me and should be looked into aoqi@0: guarantee(_stack_page_size == SIZE_4K || _stack_page_size == SIZE_64K, "Wrong page size"); aoqi@0: // also, just for completeness: pthread stacks are allocated from C heap, so aoqi@0: // stack page size should be the same as data page size aoqi@0: guarantee(_stack_page_size == data_page_size, "stack page size should be the same as data page size"); aoqi@0: } aoqi@0: aoqi@0: // EXTSHM is bad: among other things, it prevents setting pagesize dynamically aoqi@0: // for system V shm. aoqi@0: if (Aix::extshm()) { aoqi@0: if (Verbose) { aoqi@0: fprintf(stderr, "EXTSHM is active - will disable large page support.\n" aoqi@0: "Please make sure EXTSHM is OFF for large page support.\n"); aoqi@0: } aoqi@0: g_multipage_error = ERROR_MP_EXTSHM_ACTIVE; aoqi@0: _can_use_64K_pages = _can_use_16M_pages = 0; aoqi@0: goto query_multipage_support_end; aoqi@0: } aoqi@0: aoqi@0: // now check which page sizes the OS claims it supports, and of those, which actually can be used. aoqi@0: { aoqi@0: const int MAX_PAGE_SIZES = 4; aoqi@0: psize_t sizes[MAX_PAGE_SIZES]; aoqi@0: const int num_psizes = ::vmgetinfo(sizes, VMINFO_GETPSIZES, MAX_PAGE_SIZES); aoqi@0: if (num_psizes == -1) { aoqi@0: if (Verbose) { aoqi@0: fprintf(stderr, "vmgetinfo(VMINFO_GETPSIZES) failed (errno: %d)\n", errno); aoqi@0: fprintf(stderr, "disabling multipage support.\n"); aoqi@0: } aoqi@0: g_multipage_error = ERROR_MP_VMGETINFO_FAILED; aoqi@0: _can_use_64K_pages = _can_use_16M_pages = 0; aoqi@0: goto query_multipage_support_end; aoqi@0: } aoqi@0: guarantee(num_psizes > 0, "vmgetinfo(.., VMINFO_GETPSIZES, ...) failed."); aoqi@0: assert(num_psizes <= MAX_PAGE_SIZES, "Surprise! more than 4 page sizes?"); aoqi@0: if (Verbose) { aoqi@0: fprintf(stderr, "vmgetinfo(.., VMINFO_GETPSIZES, ...) returns %d supported page sizes: ", num_psizes); aoqi@0: for (int i = 0; i < num_psizes; i ++) { aoqi@0: fprintf(stderr, " %s ", describe_pagesize(sizes[i])); aoqi@0: } aoqi@0: fprintf(stderr, " .\n"); aoqi@0: } aoqi@0: aoqi@0: // Can we use 64K, 16M pages? aoqi@0: _can_use_64K_pages = 0; aoqi@0: _can_use_16M_pages = 0; aoqi@0: for (int i = 0; i < num_psizes; i ++) { aoqi@0: if (sizes[i] == SIZE_64K) { aoqi@0: _can_use_64K_pages = 1; aoqi@0: } else if (sizes[i] == SIZE_16M) { aoqi@0: _can_use_16M_pages = 1; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: if (!_can_use_64K_pages) { aoqi@0: g_multipage_error = ERROR_MP_VMGETINFO_CLAIMS_NO_SUPPORT_FOR_64K; aoqi@0: } aoqi@0: aoqi@0: // Double-check for 16M pages: Even if AIX claims to be able to use 16M pages, aoqi@0: // there must be an actual 16M page pool, and we must run with enough rights. aoqi@0: if (_can_use_16M_pages) { aoqi@0: const int shmid = ::shmget(IPC_PRIVATE, SIZE_16M, IPC_CREAT | S_IRUSR | S_IWUSR); aoqi@0: guarantee(shmid != -1, "shmget failed"); aoqi@0: struct shmid_ds shm_buf = { 0 }; aoqi@0: shm_buf.shm_pagesize = SIZE_16M; aoqi@0: const bool can_set_pagesize = ::shmctl(shmid, SHM_PAGESIZE, &shm_buf) == 0 ? true : false; aoqi@0: const int en = errno; aoqi@0: ::shmctl(shmid, IPC_RMID, NULL); aoqi@0: if (!can_set_pagesize) { aoqi@0: if (Verbose) { aoqi@0: fprintf(stderr, "Failed to allocate even one misely 16M page. shmctl failed with %d (%s).\n" aoqi@0: "Will deactivate 16M support.\n", en, strerror(en)); aoqi@0: } aoqi@0: _can_use_16M_pages = 0; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: } // end: check which pages can be used for shared memory aoqi@0: aoqi@0: query_multipage_support_end: aoqi@0: aoqi@0: guarantee(_page_size != -1 && aoqi@0: _stack_page_size != -1 && aoqi@0: _can_use_64K_pages != -1 && aoqi@0: _can_use_16M_pages != -1, "Page sizes not properly initialized"); aoqi@0: aoqi@0: if (_can_use_64K_pages) { aoqi@0: g_multipage_error = 0; aoqi@0: } aoqi@0: aoqi@0: if (Verbose) { aoqi@0: fprintf(stderr, "Data page size (C-Heap, bss, etc): %s\n", describe_pagesize(data_page_size)); aoqi@0: fprintf(stderr, "Thread stack page size (pthread): %s\n", describe_pagesize(_stack_page_size)); aoqi@0: fprintf(stderr, "Default shared memory page size: %s\n", describe_pagesize(_shm_default_page_size)); aoqi@0: fprintf(stderr, "Can use 64K pages dynamically with shared meory: %s\n", (_can_use_64K_pages ? "yes" :"no")); aoqi@0: fprintf(stderr, "Can use 16M pages dynamically with shared memory: %s\n", (_can_use_16M_pages ? "yes" :"no")); aoqi@0: fprintf(stderr, "Multipage error details: %d\n", g_multipage_error); aoqi@0: } aoqi@0: aoqi@0: } // end os::Aix::query_multipage_support() aoqi@0: aoqi@0: // The code for this method was initially derived from the version in os_linux.cpp. aoqi@0: void os::init_system_properties_values() { aoqi@0: aoqi@0: #define DEFAULT_LIBPATH "/usr/lib:/lib" aoqi@0: #define EXTENSIONS_DIR "/lib/ext" aoqi@0: #define ENDORSED_DIR "/lib/endorsed" aoqi@0: aoqi@0: // Buffer that fits several sprintfs. aoqi@0: // Note that the space for the trailing null is provided aoqi@0: // by the nulls included by the sizeof operator. aoqi@0: const size_t bufsize = aoqi@0: MAX3((size_t)MAXPATHLEN, // For dll_dir & friends. aoqi@0: (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR), // extensions dir aoqi@0: (size_t)MAXPATHLEN + sizeof(ENDORSED_DIR)); // endorsed dir aoqi@0: char *buf = (char *)NEW_C_HEAP_ARRAY(char, bufsize, mtInternal); aoqi@0: aoqi@0: // sysclasspath, java_home, dll_dir aoqi@0: { aoqi@0: char *pslash; aoqi@0: os::jvm_path(buf, bufsize); aoqi@0: aoqi@0: // Found the full path to libjvm.so. aoqi@0: // Now cut the path to /jre if we can. aoqi@0: *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so. aoqi@0: pslash = strrchr(buf, '/'); aoqi@0: if (pslash != NULL) { aoqi@0: *pslash = '\0'; // Get rid of /{client|server|hotspot}. aoqi@0: } aoqi@0: Arguments::set_dll_dir(buf); aoqi@0: aoqi@0: if (pslash != NULL) { aoqi@0: pslash = strrchr(buf, '/'); aoqi@0: if (pslash != NULL) { aoqi@0: *pslash = '\0'; // Get rid of /. aoqi@0: pslash = strrchr(buf, '/'); aoqi@0: if (pslash != NULL) { aoqi@0: *pslash = '\0'; // Get rid of /lib. aoqi@0: } aoqi@0: } aoqi@0: } aoqi@0: Arguments::set_java_home(buf); aoqi@0: set_boot_path('/', ':'); aoqi@0: } aoqi@0: aoqi@0: // Where to look for native libraries. aoqi@0: aoqi@0: // On Aix we get the user setting of LIBPATH. aoqi@0: // Eventually, all the library path setting will be done here. aoqi@0: // Get the user setting of LIBPATH. aoqi@0: const char *v = ::getenv("LIBPATH"); aoqi@0: const char *v_colon = ":"; aoqi@0: if (v == NULL) { v = ""; v_colon = ""; } aoqi@0: aoqi@0: // Concatenate user and invariant part of ld_library_path. aoqi@0: // That's +1 for the colon and +1 for the trailing '\0'. aoqi@0: char *ld_library_path = (char *)NEW_C_HEAP_ARRAY(char, strlen(v) + 1 + sizeof(DEFAULT_LIBPATH) + 1, mtInternal); aoqi@0: sprintf(ld_library_path, "%s%s" DEFAULT_LIBPATH, v, v_colon); aoqi@0: Arguments::set_library_path(ld_library_path); aoqi@0: FREE_C_HEAP_ARRAY(char, ld_library_path, mtInternal); aoqi@0: aoqi@0: // Extensions directories. aoqi@0: sprintf(buf, "%s" EXTENSIONS_DIR, Arguments::get_java_home()); aoqi@0: Arguments::set_ext_dirs(buf); aoqi@0: aoqi@0: // Endorsed standards default directory. aoqi@0: sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); aoqi@0: Arguments::set_endorsed_dirs(buf); aoqi@0: aoqi@0: FREE_C_HEAP_ARRAY(char, buf, mtInternal); aoqi@0: aoqi@0: #undef DEFAULT_LIBPATH aoqi@0: #undef EXTENSIONS_DIR aoqi@0: #undef ENDORSED_DIR aoqi@0: } aoqi@0: aoqi@0: //////////////////////////////////////////////////////////////////////////////// aoqi@0: // breakpoint support aoqi@0: aoqi@0: void os::breakpoint() { aoqi@0: BREAKPOINT; aoqi@0: } aoqi@0: aoqi@0: extern "C" void breakpoint() { aoqi@0: // use debugger to set breakpoint here aoqi@0: } aoqi@0: aoqi@0: //////////////////////////////////////////////////////////////////////////////// aoqi@0: // signal support aoqi@0: aoqi@0: debug_only(static bool signal_sets_initialized = false); aoqi@0: static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; aoqi@0: aoqi@0: bool os::Aix::is_sig_ignored(int sig) { aoqi@0: struct sigaction oact; aoqi@0: sigaction(sig, (struct sigaction*)NULL, &oact); aoqi@0: void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) aoqi@0: : CAST_FROM_FN_PTR(void*, oact.sa_handler); aoqi@0: if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) aoqi@0: return true; aoqi@0: else aoqi@0: return false; aoqi@0: } aoqi@0: aoqi@0: void os::Aix::signal_sets_init() { aoqi@0: // Should also have an assertion stating we are still single-threaded. aoqi@0: assert(!signal_sets_initialized, "Already initialized"); aoqi@0: // Fill in signals that are necessarily unblocked for all threads in aoqi@0: // the VM. Currently, we unblock the following signals: aoqi@0: // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden aoqi@0: // by -Xrs (=ReduceSignalUsage)); aoqi@0: // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all aoqi@0: // other threads. The "ReduceSignalUsage" boolean tells us not to alter aoqi@0: // the dispositions or masks wrt these signals. aoqi@0: // Programs embedding the VM that want to use the above signals for their aoqi@0: // own purposes must, at this time, use the "-Xrs" option to prevent aoqi@0: // interference with shutdown hooks and BREAK_SIGNAL thread dumping. aoqi@0: // (See bug 4345157, and other related bugs). aoqi@0: // In reality, though, unblocking these signals is really a nop, since aoqi@0: // these signals are not blocked by default. aoqi@0: sigemptyset(&unblocked_sigs); aoqi@0: sigemptyset(&allowdebug_blocked_sigs); aoqi@0: sigaddset(&unblocked_sigs, SIGILL); aoqi@0: sigaddset(&unblocked_sigs, SIGSEGV); aoqi@0: sigaddset(&unblocked_sigs, SIGBUS); aoqi@0: sigaddset(&unblocked_sigs, SIGFPE); aoqi@0: sigaddset(&unblocked_sigs, SIGTRAP); aoqi@0: sigaddset(&unblocked_sigs, SIGDANGER); aoqi@0: sigaddset(&unblocked_sigs, SR_signum); aoqi@0: aoqi@0: if (!ReduceSignalUsage) { aoqi@0: if (!os::Aix::is_sig_ignored(SHUTDOWN1_SIGNAL)) { aoqi@0: sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); aoqi@0: sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); aoqi@0: } aoqi@0: if (!os::Aix::is_sig_ignored(SHUTDOWN2_SIGNAL)) { aoqi@0: sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); aoqi@0: sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); aoqi@0: } aoqi@0: if (!os::Aix::is_sig_ignored(SHUTDOWN3_SIGNAL)) { aoqi@0: sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); aoqi@0: sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); aoqi@0: } aoqi@0: } aoqi@0: // Fill in signals that are blocked by all but the VM thread. aoqi@0: sigemptyset(&vm_sigs); aoqi@0: if (!ReduceSignalUsage) aoqi@0: sigaddset(&vm_sigs, BREAK_SIGNAL); aoqi@0: debug_only(signal_sets_initialized = true); aoqi@0: } aoqi@0: aoqi@0: // These are signals that are unblocked while a thread is running Java. aoqi@0: // (For some reason, they get blocked by default.) aoqi@0: sigset_t* os::Aix::unblocked_signals() { aoqi@0: assert(signal_sets_initialized, "Not initialized"); aoqi@0: return &unblocked_sigs; aoqi@0: } aoqi@0: aoqi@0: // These are the signals that are blocked while a (non-VM) thread is aoqi@0: // running Java. Only the VM thread handles these signals. aoqi@0: sigset_t* os::Aix::vm_signals() { aoqi@0: assert(signal_sets_initialized, "Not initialized"); aoqi@0: return &vm_sigs; aoqi@0: } aoqi@0: aoqi@0: // These are signals that are blocked during cond_wait to allow debugger in aoqi@0: sigset_t* os::Aix::allowdebug_blocked_signals() { aoqi@0: assert(signal_sets_initialized, "Not initialized"); aoqi@0: return &allowdebug_blocked_sigs; aoqi@0: } aoqi@0: aoqi@0: void os::Aix::hotspot_sigmask(Thread* thread) { aoqi@0: aoqi@0: //Save caller's signal mask before setting VM signal mask aoqi@0: sigset_t caller_sigmask; aoqi@0: pthread_sigmask(SIG_BLOCK, NULL, &caller_sigmask); aoqi@0: aoqi@0: OSThread* osthread = thread->osthread(); aoqi@0: osthread->set_caller_sigmask(caller_sigmask); aoqi@0: aoqi@0: pthread_sigmask(SIG_UNBLOCK, os::Aix::unblocked_signals(), NULL); aoqi@0: aoqi@0: if (!ReduceSignalUsage) { aoqi@0: if (thread->is_VM_thread()) { aoqi@0: // Only the VM thread handles BREAK_SIGNAL ... aoqi@0: pthread_sigmask(SIG_UNBLOCK, vm_signals(), NULL); aoqi@0: } else { aoqi@0: // ... all other threads block BREAK_SIGNAL aoqi@0: pthread_sigmask(SIG_BLOCK, vm_signals(), NULL); aoqi@0: } aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // retrieve memory information. aoqi@0: // Returns false if something went wrong; aoqi@0: // content of pmi undefined in this case. aoqi@0: bool os::Aix::get_meminfo(meminfo_t* pmi) { aoqi@0: aoqi@0: assert(pmi, "get_meminfo: invalid parameter"); aoqi@0: aoqi@0: memset(pmi, 0, sizeof(meminfo_t)); aoqi@0: aoqi@0: if (os::Aix::on_pase()) { aoqi@0: aoqi@0: Unimplemented(); aoqi@0: return false; aoqi@0: aoqi@0: } else { aoqi@0: aoqi@0: // On AIX, I use the (dynamically loaded) perfstat library to retrieve memory statistics aoqi@0: // See: aoqi@0: // http://publib.boulder.ibm.com/infocenter/systems/index.jsp aoqi@0: // ?topic=/com.ibm.aix.basetechref/doc/basetrf1/perfstat_memtot.htm aoqi@0: // http://publib.boulder.ibm.com/infocenter/systems/index.jsp aoqi@0: // ?topic=/com.ibm.aix.files/doc/aixfiles/libperfstat.h.htm aoqi@0: aoqi@0: perfstat_memory_total_t psmt; aoqi@0: memset (&psmt, '\0', sizeof(psmt)); aoqi@0: const int rc = libperfstat::perfstat_memory_total(NULL, &psmt, sizeof(psmt), 1); aoqi@0: if (rc == -1) { aoqi@0: fprintf(stderr, "perfstat_memory_total() failed (errno=%d)\n", errno); aoqi@0: assert(0, "perfstat_memory_total() failed"); aoqi@0: return false; aoqi@0: } aoqi@0: aoqi@0: assert(rc == 1, "perfstat_memory_total() - weird return code"); aoqi@0: aoqi@0: // excerpt from aoqi@0: // http://publib.boulder.ibm.com/infocenter/systems/index.jsp aoqi@0: // ?topic=/com.ibm.aix.files/doc/aixfiles/libperfstat.h.htm aoqi@0: // The fields of perfstat_memory_total_t: aoqi@0: // u_longlong_t virt_total Total virtual memory (in 4 KB pages). aoqi@0: // u_longlong_t real_total Total real memory (in 4 KB pages). aoqi@0: // u_longlong_t real_free Free real memory (in 4 KB pages). aoqi@0: // u_longlong_t pgsp_total Total paging space (in 4 KB pages). aoqi@0: // u_longlong_t pgsp_free Free paging space (in 4 KB pages). aoqi@0: aoqi@0: pmi->virt_total = psmt.virt_total * 4096; aoqi@0: pmi->real_total = psmt.real_total * 4096; aoqi@0: pmi->real_free = psmt.real_free * 4096; aoqi@0: pmi->pgsp_total = psmt.pgsp_total * 4096; aoqi@0: pmi->pgsp_free = psmt.pgsp_free * 4096; aoqi@0: aoqi@0: return true; aoqi@0: aoqi@0: } aoqi@0: } // end os::Aix::get_meminfo aoqi@0: aoqi@0: // Retrieve global cpu information. aoqi@0: // Returns false if something went wrong; aoqi@0: // the content of pci is undefined in this case. aoqi@0: bool os::Aix::get_cpuinfo(cpuinfo_t* pci) { aoqi@0: assert(pci, "get_cpuinfo: invalid parameter"); aoqi@0: memset(pci, 0, sizeof(cpuinfo_t)); aoqi@0: aoqi@0: perfstat_cpu_total_t psct; aoqi@0: memset (&psct, '\0', sizeof(psct)); aoqi@0: aoqi@0: if (-1 == libperfstat::perfstat_cpu_total(NULL, &psct, sizeof(perfstat_cpu_total_t), 1)) { aoqi@0: fprintf(stderr, "perfstat_cpu_total() failed (errno=%d)\n", errno); aoqi@0: assert(0, "perfstat_cpu_total() failed"); aoqi@0: return false; aoqi@0: } aoqi@0: aoqi@0: // global cpu information aoqi@0: strcpy (pci->description, psct.description); aoqi@0: pci->processorHZ = psct.processorHZ; aoqi@0: pci->ncpus = psct.ncpus; aoqi@0: os::Aix::_logical_cpus = psct.ncpus; aoqi@0: for (int i = 0; i < 3; i++) { aoqi@0: pci->loadavg[i] = (double) psct.loadavg[i] / (1 << SBITS); aoqi@0: } aoqi@0: aoqi@0: // get the processor version from _system_configuration aoqi@0: switch (_system_configuration.version) { aoqi@0: case PV_7: aoqi@0: strcpy(pci->version, "Power PC 7"); aoqi@0: break; aoqi@0: case PV_6_1: aoqi@0: strcpy(pci->version, "Power PC 6 DD1.x"); aoqi@0: break; aoqi@0: case PV_6: aoqi@0: strcpy(pci->version, "Power PC 6"); aoqi@0: break; aoqi@0: case PV_5: aoqi@0: strcpy(pci->version, "Power PC 5"); aoqi@0: break; aoqi@0: case PV_5_2: aoqi@0: strcpy(pci->version, "Power PC 5_2"); aoqi@0: break; aoqi@0: case PV_5_3: aoqi@0: strcpy(pci->version, "Power PC 5_3"); aoqi@0: break; aoqi@0: case PV_5_Compat: aoqi@0: strcpy(pci->version, "PV_5_Compat"); aoqi@0: break; aoqi@0: case PV_6_Compat: aoqi@0: strcpy(pci->version, "PV_6_Compat"); aoqi@0: break; aoqi@0: case PV_7_Compat: aoqi@0: strcpy(pci->version, "PV_7_Compat"); aoqi@0: break; aoqi@0: default: aoqi@0: strcpy(pci->version, "unknown"); aoqi@0: } aoqi@0: aoqi@0: return true; aoqi@0: aoqi@0: } //end os::Aix::get_cpuinfo aoqi@0: aoqi@0: ////////////////////////////////////////////////////////////////////////////// aoqi@0: // detecting pthread library aoqi@0: aoqi@0: void os::Aix::libpthread_init() { aoqi@0: return; aoqi@0: } aoqi@0: aoqi@0: ////////////////////////////////////////////////////////////////////////////// aoqi@0: // create new thread aoqi@0: aoqi@0: // Thread start routine for all newly created threads aoqi@0: static void *java_start(Thread *thread) { aoqi@0: aoqi@0: // find out my own stack dimensions aoqi@0: { aoqi@0: // actually, this should do exactly the same as thread->record_stack_base_and_size... aoqi@0: address base = 0; aoqi@0: size_t size = 0; aoqi@0: query_stack_dimensions(&base, &size); aoqi@0: thread->set_stack_base(base); aoqi@0: thread->set_stack_size(size); aoqi@0: } aoqi@0: aoqi@0: // Do some sanity checks. aoqi@0: CHECK_CURRENT_STACK_PTR(thread->stack_base(), thread->stack_size()); aoqi@0: aoqi@0: // Try to randomize the cache line index of hot stack frames. aoqi@0: // This helps when threads of the same stack traces evict each other's aoqi@0: // cache lines. The threads can be either from the same JVM instance, or aoqi@0: // from different JVM instances. The benefit is especially true for aoqi@0: // processors with hyperthreading technology. aoqi@0: aoqi@0: static int counter = 0; aoqi@0: int pid = os::current_process_id(); aoqi@0: alloca(((pid ^ counter++) & 7) * 128); aoqi@0: aoqi@0: ThreadLocalStorage::set_thread(thread); aoqi@0: aoqi@0: OSThread* osthread = thread->osthread(); aoqi@0: aoqi@0: // thread_id is kernel thread id (similar to Solaris LWP id) aoqi@0: osthread->set_thread_id(os::Aix::gettid()); aoqi@0: aoqi@0: // initialize signal mask for this thread aoqi@0: os::Aix::hotspot_sigmask(thread); aoqi@0: aoqi@0: // initialize floating point control register aoqi@0: os::Aix::init_thread_fpu_state(); aoqi@0: aoqi@0: assert(osthread->get_state() == RUNNABLE, "invalid os thread state"); aoqi@0: aoqi@0: // call one more level start routine aoqi@0: thread->run(); aoqi@0: aoqi@0: return 0; aoqi@0: } aoqi@0: aoqi@0: bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { aoqi@0: aoqi@0: // We want the whole function to be synchronized. aoqi@0: ThreadCritical cs; aoqi@0: aoqi@0: assert(thread->osthread() == NULL, "caller responsible"); aoqi@0: aoqi@0: // Allocate the OSThread object aoqi@0: OSThread* osthread = new OSThread(NULL, NULL); aoqi@0: if (osthread == NULL) { aoqi@0: return false; aoqi@0: } aoqi@0: aoqi@0: // set the correct thread state aoqi@0: osthread->set_thread_type(thr_type); aoqi@0: aoqi@0: // Initial state is ALLOCATED but not INITIALIZED aoqi@0: osthread->set_state(ALLOCATED); aoqi@0: aoqi@0: thread->set_osthread(osthread); aoqi@0: aoqi@0: // init thread attributes aoqi@0: pthread_attr_t attr; aoqi@0: pthread_attr_init(&attr); aoqi@0: guarantee(pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED) == 0, "???"); aoqi@0: aoqi@0: // Make sure we run in 1:1 kernel-user-thread mode. aoqi@0: if (os::Aix::on_aix()) { aoqi@0: guarantee(pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM) == 0, "???"); aoqi@0: guarantee(pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED) == 0, "???"); aoqi@0: } // end: aix aoqi@0: aoqi@0: // Start in suspended state, and in os::thread_start, wake the thread up. aoqi@0: guarantee(pthread_attr_setsuspendstate_np(&attr, PTHREAD_CREATE_SUSPENDED_NP) == 0, "???"); aoqi@0: aoqi@0: // calculate stack size if it's not specified by caller aoqi@0: if (os::Aix::supports_variable_stack_size()) { aoqi@0: if (stack_size == 0) { aoqi@0: stack_size = os::Aix::default_stack_size(thr_type); aoqi@0: aoqi@0: switch (thr_type) { aoqi@0: case os::java_thread: aoqi@0: // Java threads use ThreadStackSize whose default value can be changed with the flag -Xss. aoqi@0: assert(JavaThread::stack_size_at_create() > 0, "this should be set"); aoqi@0: stack_size = JavaThread::stack_size_at_create(); aoqi@0: break; aoqi@0: case os::compiler_thread: aoqi@0: if (CompilerThreadStackSize > 0) { aoqi@0: stack_size = (size_t)(CompilerThreadStackSize * K); aoqi@0: break; aoqi@0: } // else fall through: aoqi@0: // use VMThreadStackSize if CompilerThreadStackSize is not defined aoqi@0: case os::vm_thread: aoqi@0: case os::pgc_thread: aoqi@0: case os::cgc_thread: aoqi@0: case os::watcher_thread: aoqi@0: if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); aoqi@0: break; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: stack_size = MAX2(stack_size, os::Aix::min_stack_allowed); aoqi@0: pthread_attr_setstacksize(&attr, stack_size); aoqi@0: } //else let thread_create() pick the default value (96 K on AIX) aoqi@0: aoqi@0: pthread_t tid; aoqi@0: int ret = pthread_create(&tid, &attr, (void* (*)(void*)) java_start, thread); aoqi@0: aoqi@0: pthread_attr_destroy(&attr); aoqi@0: aoqi@0: if (ret != 0) { aoqi@0: if (PrintMiscellaneous && (Verbose || WizardMode)) { aoqi@0: perror("pthread_create()"); aoqi@0: } aoqi@0: // Need to clean up stuff we've allocated so far aoqi@0: thread->set_osthread(NULL); aoqi@0: delete osthread; aoqi@0: return false; aoqi@0: } aoqi@0: aoqi@0: // Store pthread info into the OSThread aoqi@0: osthread->set_pthread_id(tid); aoqi@0: aoqi@0: return true; aoqi@0: } aoqi@0: aoqi@0: ///////////////////////////////////////////////////////////////////////////// aoqi@0: // attach existing thread aoqi@0: aoqi@0: // bootstrap the main thread aoqi@0: bool os::create_main_thread(JavaThread* thread) { aoqi@0: assert(os::Aix::_main_thread == pthread_self(), "should be called inside main thread"); aoqi@0: return create_attached_thread(thread); aoqi@0: } aoqi@0: aoqi@0: bool os::create_attached_thread(JavaThread* thread) { aoqi@0: #ifdef ASSERT aoqi@0: thread->verify_not_published(); aoqi@0: #endif aoqi@0: aoqi@0: // Allocate the OSThread object aoqi@0: OSThread* osthread = new OSThread(NULL, NULL); aoqi@0: aoqi@0: if (osthread == NULL) { aoqi@0: return false; aoqi@0: } aoqi@0: aoqi@0: // Store pthread info into the OSThread aoqi@0: osthread->set_thread_id(os::Aix::gettid()); aoqi@0: osthread->set_pthread_id(::pthread_self()); aoqi@0: aoqi@0: // initialize floating point control register aoqi@0: os::Aix::init_thread_fpu_state(); aoqi@0: aoqi@0: // some sanity checks aoqi@0: CHECK_CURRENT_STACK_PTR(thread->stack_base(), thread->stack_size()); aoqi@0: aoqi@0: // Initial thread state is RUNNABLE aoqi@0: osthread->set_state(RUNNABLE); aoqi@0: aoqi@0: thread->set_osthread(osthread); aoqi@0: aoqi@0: if (UseNUMA) { aoqi@0: int lgrp_id = os::numa_get_group_id(); aoqi@0: if (lgrp_id != -1) { aoqi@0: thread->set_lgrp_id(lgrp_id); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // initialize signal mask for this thread aoqi@0: // and save the caller's signal mask aoqi@0: os::Aix::hotspot_sigmask(thread); aoqi@0: aoqi@0: return true; aoqi@0: } aoqi@0: aoqi@0: void os::pd_start_thread(Thread* thread) { aoqi@0: int status = pthread_continue_np(thread->osthread()->pthread_id()); aoqi@0: assert(status == 0, "thr_continue failed"); aoqi@0: } aoqi@0: aoqi@0: // Free OS resources related to the OSThread aoqi@0: void os::free_thread(OSThread* osthread) { aoqi@0: assert(osthread != NULL, "osthread not set"); aoqi@0: aoqi@0: if (Thread::current()->osthread() == osthread) { aoqi@0: // Restore caller's signal mask aoqi@0: sigset_t sigmask = osthread->caller_sigmask(); aoqi@0: pthread_sigmask(SIG_SETMASK, &sigmask, NULL); aoqi@0: } aoqi@0: aoqi@0: delete osthread; aoqi@0: } aoqi@0: aoqi@0: ////////////////////////////////////////////////////////////////////////////// aoqi@0: // thread local storage aoqi@0: aoqi@0: int os::allocate_thread_local_storage() { aoqi@0: pthread_key_t key; aoqi@0: int rslt = pthread_key_create(&key, NULL); aoqi@0: assert(rslt == 0, "cannot allocate thread local storage"); aoqi@0: return (int)key; aoqi@0: } aoqi@0: aoqi@0: // Note: This is currently not used by VM, as we don't destroy TLS key aoqi@0: // on VM exit. aoqi@0: void os::free_thread_local_storage(int index) { aoqi@0: int rslt = pthread_key_delete((pthread_key_t)index); aoqi@0: assert(rslt == 0, "invalid index"); aoqi@0: } aoqi@0: aoqi@0: void os::thread_local_storage_at_put(int index, void* value) { aoqi@0: int rslt = pthread_setspecific((pthread_key_t)index, value); aoqi@0: assert(rslt == 0, "pthread_setspecific failed"); aoqi@0: } aoqi@0: aoqi@0: extern "C" Thread* get_thread() { aoqi@0: return ThreadLocalStorage::thread(); aoqi@0: } aoqi@0: aoqi@0: //////////////////////////////////////////////////////////////////////////////// aoqi@0: // time support aoqi@0: aoqi@0: // Time since start-up in seconds to a fine granularity. aoqi@0: // Used by VMSelfDestructTimer and the MemProfiler. aoqi@0: double os::elapsedTime() { aoqi@0: return (double)(os::elapsed_counter()) * 0.000001; aoqi@0: } aoqi@0: aoqi@0: jlong os::elapsed_counter() { aoqi@0: timeval time; aoqi@0: int status = gettimeofday(&time, NULL); aoqi@0: return jlong(time.tv_sec) * 1000 * 1000 + jlong(time.tv_usec) - initial_time_count; aoqi@0: } aoqi@0: aoqi@0: jlong os::elapsed_frequency() { aoqi@0: return (1000 * 1000); aoqi@0: } aoqi@0: aoqi@0: // For now, we say that linux does not support vtime. I have no idea aoqi@0: // whether it can actually be made to (DLD, 9/13/05). aoqi@0: aoqi@0: bool os::supports_vtime() { return false; } aoqi@0: bool os::enable_vtime() { return false; } aoqi@0: bool os::vtime_enabled() { return false; } aoqi@0: double os::elapsedVTime() { aoqi@0: // better than nothing, but not much aoqi@0: return elapsedTime(); aoqi@0: } aoqi@0: aoqi@0: jlong os::javaTimeMillis() { aoqi@0: timeval time; aoqi@0: int status = gettimeofday(&time, NULL); aoqi@0: assert(status != -1, "aix error at gettimeofday()"); aoqi@0: return jlong(time.tv_sec) * 1000 + jlong(time.tv_usec / 1000); aoqi@0: } aoqi@0: aoqi@0: // We need to manually declare mread_real_time, aoqi@0: // because IBM didn't provide a prototype in time.h. aoqi@0: // (they probably only ever tested in C, not C++) aoqi@0: extern "C" aoqi@0: int mread_real_time(timebasestruct_t *t, size_t size_of_timebasestruct_t); aoqi@0: aoqi@0: jlong os::javaTimeNanos() { aoqi@0: if (os::Aix::on_pase()) { aoqi@0: Unimplemented(); aoqi@0: return 0; aoqi@0: } aoqi@0: else { aoqi@0: // On AIX use the precision of processors real time clock aoqi@0: // or time base registers. aoqi@0: timebasestruct_t time; aoqi@0: int rc; aoqi@0: aoqi@0: // If the CPU has a time register, it will be used and aoqi@0: // we have to convert to real time first. After convertion we have following data: aoqi@0: // time.tb_high [seconds since 00:00:00 UTC on 1.1.1970] aoqi@0: // time.tb_low [nanoseconds after the last full second above] aoqi@0: // We better use mread_real_time here instead of read_real_time aoqi@0: // to ensure that we will get a monotonic increasing time. aoqi@0: if (mread_real_time(&time, TIMEBASE_SZ) != RTC_POWER) { aoqi@0: rc = time_base_to_time(&time, TIMEBASE_SZ); aoqi@0: assert(rc != -1, "aix error at time_base_to_time()"); aoqi@0: } aoqi@0: return jlong(time.tb_high) * (1000 * 1000 * 1000) + jlong(time.tb_low); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { aoqi@0: { aoqi@0: // gettimeofday - based on time in seconds since the Epoch thus does not wrap aoqi@0: info_ptr->max_value = ALL_64_BITS; aoqi@0: aoqi@0: // gettimeofday is a real time clock so it skips aoqi@0: info_ptr->may_skip_backward = true; aoqi@0: info_ptr->may_skip_forward = true; aoqi@0: } aoqi@0: aoqi@0: info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time aoqi@0: } aoqi@0: aoqi@0: // Return the real, user, and system times in seconds from an aoqi@0: // arbitrary fixed point in the past. aoqi@0: bool os::getTimesSecs(double* process_real_time, aoqi@0: double* process_user_time, aoqi@0: double* process_system_time) { aoqi@0: struct tms ticks; aoqi@0: clock_t real_ticks = times(&ticks); aoqi@0: aoqi@0: if (real_ticks == (clock_t) (-1)) { aoqi@0: return false; aoqi@0: } else { aoqi@0: double ticks_per_second = (double) clock_tics_per_sec; aoqi@0: *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; aoqi@0: *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; aoqi@0: *process_real_time = ((double) real_ticks) / ticks_per_second; aoqi@0: aoqi@0: return true; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: aoqi@0: char * os::local_time_string(char *buf, size_t buflen) { aoqi@0: struct tm t; aoqi@0: time_t long_time; aoqi@0: time(&long_time); aoqi@0: localtime_r(&long_time, &t); aoqi@0: jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", aoqi@0: t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, aoqi@0: t.tm_hour, t.tm_min, t.tm_sec); aoqi@0: return buf; aoqi@0: } aoqi@0: aoqi@0: struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { aoqi@0: return localtime_r(clock, res); aoqi@0: } aoqi@0: aoqi@0: //////////////////////////////////////////////////////////////////////////////// aoqi@0: // runtime exit support aoqi@0: aoqi@0: // Note: os::shutdown() might be called very early during initialization, or aoqi@0: // called from signal handler. Before adding something to os::shutdown(), make aoqi@0: // sure it is async-safe and can handle partially initialized VM. aoqi@0: void os::shutdown() { aoqi@0: aoqi@0: // allow PerfMemory to attempt cleanup of any persistent resources aoqi@0: perfMemory_exit(); aoqi@0: aoqi@0: // needs to remove object in file system aoqi@0: AttachListener::abort(); aoqi@0: aoqi@0: // flush buffered output, finish log files aoqi@0: ostream_abort(); aoqi@0: aoqi@0: // Check for abort hook aoqi@0: abort_hook_t abort_hook = Arguments::abort_hook(); aoqi@0: if (abort_hook != NULL) { aoqi@0: abort_hook(); aoqi@0: } aoqi@0: aoqi@0: } aoqi@0: aoqi@0: // Note: os::abort() might be called very early during initialization, or aoqi@0: // called from signal handler. Before adding something to os::abort(), make aoqi@0: // sure it is async-safe and can handle partially initialized VM. aoqi@0: void os::abort(bool dump_core) { aoqi@0: os::shutdown(); aoqi@0: if (dump_core) { aoqi@0: #ifndef PRODUCT aoqi@0: fdStream out(defaultStream::output_fd()); aoqi@0: out.print_raw("Current thread is "); aoqi@0: char buf[16]; aoqi@0: jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); aoqi@0: out.print_raw_cr(buf); aoqi@0: out.print_raw_cr("Dumping core ..."); aoqi@0: #endif aoqi@0: ::abort(); // dump core aoqi@0: } aoqi@0: aoqi@0: ::exit(1); aoqi@0: } aoqi@0: aoqi@0: // Die immediately, no exit hook, no abort hook, no cleanup. aoqi@0: void os::die() { aoqi@0: ::abort(); aoqi@0: } aoqi@0: aoqi@0: // This method is a copy of JDK's sysGetLastErrorString aoqi@0: // from src/solaris/hpi/src/system_md.c aoqi@0: aoqi@0: size_t os::lasterror(char *buf, size_t len) { aoqi@0: aoqi@0: if (errno == 0) return 0; aoqi@0: aoqi@0: const char *s = ::strerror(errno); aoqi@0: size_t n = ::strlen(s); aoqi@0: if (n >= len) { aoqi@0: n = len - 1; aoqi@0: } aoqi@0: ::strncpy(buf, s, n); aoqi@0: buf[n] = '\0'; aoqi@0: return n; aoqi@0: } aoqi@0: aoqi@0: intx os::current_thread_id() { return (intx)pthread_self(); } aoqi@0: int os::current_process_id() { aoqi@0: aoqi@0: // This implementation returns a unique pid, the pid of the aoqi@0: // launcher thread that starts the vm 'process'. aoqi@0: aoqi@0: // Under POSIX, getpid() returns the same pid as the aoqi@0: // launcher thread rather than a unique pid per thread. aoqi@0: // Use gettid() if you want the old pre NPTL behaviour. aoqi@0: aoqi@0: // if you are looking for the result of a call to getpid() that aoqi@0: // returns a unique pid for the calling thread, then look at the aoqi@0: // OSThread::thread_id() method in osThread_linux.hpp file aoqi@0: aoqi@0: return (int)(_initial_pid ? _initial_pid : getpid()); aoqi@0: } aoqi@0: aoqi@0: // DLL functions aoqi@0: aoqi@0: const char* os::dll_file_extension() { return ".so"; } aoqi@0: aoqi@0: // This must be hard coded because it's the system's temporary aoqi@0: // directory not the java application's temp directory, ala java.io.tmpdir. aoqi@0: const char* os::get_temp_directory() { return "/tmp"; } aoqi@0: aoqi@0: static bool file_exists(const char* filename) { aoqi@0: struct stat statbuf; aoqi@0: if (filename == NULL || strlen(filename) == 0) { aoqi@0: return false; aoqi@0: } aoqi@0: return os::stat(filename, &statbuf) == 0; aoqi@0: } aoqi@0: aoqi@0: bool os::dll_build_name(char* buffer, size_t buflen, aoqi@0: const char* pname, const char* fname) { aoqi@0: bool retval = false; aoqi@0: // Copied from libhpi aoqi@0: const size_t pnamelen = pname ? strlen(pname) : 0; aoqi@0: aoqi@0: // Return error on buffer overflow. aoqi@0: if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { aoqi@0: *buffer = '\0'; aoqi@0: return retval; aoqi@0: } aoqi@0: aoqi@0: if (pnamelen == 0) { aoqi@0: snprintf(buffer, buflen, "lib%s.so", fname); aoqi@0: retval = true; aoqi@0: } else if (strchr(pname, *os::path_separator()) != NULL) { aoqi@0: int n; aoqi@0: char** pelements = split_path(pname, &n); aoqi@0: for (int i = 0; i < n; i++) { aoqi@0: // Really shouldn't be NULL, but check can't hurt aoqi@0: if (pelements[i] == NULL || strlen(pelements[i]) == 0) { aoqi@0: continue; // skip the empty path values aoqi@0: } aoqi@0: snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); aoqi@0: if (file_exists(buffer)) { aoqi@0: retval = true; aoqi@0: break; aoqi@0: } aoqi@0: } aoqi@0: // release the storage aoqi@0: for (int i = 0; i < n; i++) { aoqi@0: if (pelements[i] != NULL) { aoqi@0: FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal); aoqi@0: } aoqi@0: } aoqi@0: if (pelements != NULL) { aoqi@0: FREE_C_HEAP_ARRAY(char*, pelements, mtInternal); aoqi@0: } aoqi@0: } else { aoqi@0: snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); aoqi@0: retval = true; aoqi@0: } aoqi@0: return retval; aoqi@0: } aoqi@0: aoqi@0: // Check if addr is inside libjvm.so. aoqi@0: bool os::address_is_in_vm(address addr) { aoqi@0: aoqi@0: // Input could be a real pc or a function pointer literal. The latter aoqi@0: // would be a function descriptor residing in the data segment of a module. aoqi@0: aoqi@0: const LoadedLibraryModule* lib = LoadedLibraries::find_for_text_address(addr); aoqi@0: if (lib) { aoqi@0: if (strcmp(lib->get_shortname(), "libjvm.so") == 0) { aoqi@0: return true; aoqi@0: } else { aoqi@0: return false; aoqi@0: } aoqi@0: } else { aoqi@0: lib = LoadedLibraries::find_for_data_address(addr); aoqi@0: if (lib) { aoqi@0: if (strcmp(lib->get_shortname(), "libjvm.so") == 0) { aoqi@0: return true; aoqi@0: } else { aoqi@0: return false; aoqi@0: } aoqi@0: } else { aoqi@0: return false; aoqi@0: } aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // Resolve an AIX function descriptor literal to a code pointer. aoqi@0: // If the input is a valid code pointer to a text segment of a loaded module, aoqi@0: // it is returned unchanged. aoqi@0: // If the input is a valid AIX function descriptor, it is resolved to the aoqi@0: // code entry point. aoqi@0: // If the input is neither a valid function descriptor nor a valid code pointer, aoqi@0: // NULL is returned. aoqi@0: static address resolve_function_descriptor_to_code_pointer(address p) { aoqi@0: aoqi@0: const LoadedLibraryModule* lib = LoadedLibraries::find_for_text_address(p); aoqi@0: if (lib) { aoqi@0: // its a real code pointer aoqi@0: return p; aoqi@0: } else { aoqi@0: lib = LoadedLibraries::find_for_data_address(p); aoqi@0: if (lib) { aoqi@0: // pointer to data segment, potential function descriptor aoqi@0: address code_entry = (address)(((FunctionDescriptor*)p)->entry()); aoqi@0: if (LoadedLibraries::find_for_text_address(code_entry)) { aoqi@0: // Its a function descriptor aoqi@0: return code_entry; aoqi@0: } aoqi@0: } aoqi@0: } aoqi@0: return NULL; aoqi@0: } aoqi@0: aoqi@0: bool os::dll_address_to_function_name(address addr, char *buf, aoqi@0: int buflen, int *offset) { aoqi@0: if (offset) { aoqi@0: *offset = -1; aoqi@0: } aoqi@0: if (buf) { aoqi@0: buf[0] = '\0'; aoqi@0: } aoqi@0: aoqi@0: // Resolve function ptr literals first. aoqi@0: addr = resolve_function_descriptor_to_code_pointer(addr); aoqi@0: if (!addr) { aoqi@0: return false; aoqi@0: } aoqi@0: aoqi@0: // Go through Decoder::decode to call getFuncName which reads the name from the traceback table. aoqi@0: return Decoder::decode(addr, buf, buflen, offset); aoqi@0: } aoqi@0: aoqi@0: static int getModuleName(codeptr_t pc, // [in] program counter aoqi@0: char* p_name, size_t namelen, // [out] optional: function name aoqi@0: char* p_errmsg, size_t errmsglen // [out] optional: user provided buffer for error messages aoqi@0: ) { aoqi@0: aoqi@0: // initialize output parameters aoqi@0: if (p_name && namelen > 0) { aoqi@0: *p_name = '\0'; aoqi@0: } aoqi@0: if (p_errmsg && errmsglen > 0) { aoqi@0: *p_errmsg = '\0'; aoqi@0: } aoqi@0: aoqi@0: const LoadedLibraryModule* const lib = LoadedLibraries::find_for_text_address((address)pc); aoqi@0: if (lib) { aoqi@0: if (p_name && namelen > 0) { aoqi@0: sprintf(p_name, "%.*s", namelen, lib->get_shortname()); aoqi@0: } aoqi@0: return 0; aoqi@0: } aoqi@0: aoqi@0: if (Verbose) { aoqi@0: fprintf(stderr, "pc outside any module"); aoqi@0: } aoqi@0: aoqi@0: return -1; aoqi@0: aoqi@0: } aoqi@0: aoqi@0: bool os::dll_address_to_library_name(address addr, char* buf, aoqi@0: int buflen, int* offset) { aoqi@0: if (offset) { aoqi@0: *offset = -1; aoqi@0: } aoqi@0: if (buf) { aoqi@0: buf[0] = '\0'; aoqi@0: } aoqi@0: aoqi@0: // Resolve function ptr literals first. aoqi@0: addr = resolve_function_descriptor_to_code_pointer(addr); aoqi@0: if (!addr) { aoqi@0: return false; aoqi@0: } aoqi@0: aoqi@0: if (::getModuleName((codeptr_t) addr, buf, buflen, 0, 0) == 0) { aoqi@0: return true; aoqi@0: } aoqi@0: return false; aoqi@0: } aoqi@0: aoqi@0: // Loads .dll/.so and in case of error it checks if .dll/.so was built aoqi@0: // for the same architecture as Hotspot is running on aoqi@0: void *os::dll_load(const char *filename, char *ebuf, int ebuflen) { aoqi@0: aoqi@0: if (ebuf && ebuflen > 0) { aoqi@0: ebuf[0] = '\0'; aoqi@0: ebuf[ebuflen - 1] = '\0'; aoqi@0: } aoqi@0: aoqi@0: if (!filename || strlen(filename) == 0) { aoqi@0: ::strncpy(ebuf, "dll_load: empty filename specified", ebuflen - 1); aoqi@0: return NULL; aoqi@0: } aoqi@0: aoqi@0: // RTLD_LAZY is currently not implemented. The dl is loaded immediately with all its dependants. aoqi@0: void * result= ::dlopen(filename, RTLD_LAZY); aoqi@0: if (result != NULL) { aoqi@0: // Reload dll cache. Don't do this in signal handling. aoqi@0: LoadedLibraries::reload(); aoqi@0: return result; aoqi@0: } else { aoqi@0: // error analysis when dlopen fails aoqi@0: const char* const error_report = ::dlerror(); aoqi@0: if (error_report && ebuf && ebuflen > 0) { aoqi@0: snprintf(ebuf, ebuflen - 1, "%s, LIBPATH=%s, LD_LIBRARY_PATH=%s : %s", aoqi@0: filename, ::getenv("LIBPATH"), ::getenv("LD_LIBRARY_PATH"), error_report); aoqi@0: } aoqi@0: } aoqi@0: return NULL; aoqi@0: } aoqi@0: aoqi@0: // Glibc-2.0 libdl is not MT safe. If you are building with any glibc, aoqi@0: // chances are you might want to run the generated bits against glibc-2.0 aoqi@0: // libdl.so, so always use locking for any version of glibc. aoqi@0: void* os::dll_lookup(void* handle, const char* name) { aoqi@0: pthread_mutex_lock(&dl_mutex); aoqi@0: void* res = dlsym(handle, name); aoqi@0: pthread_mutex_unlock(&dl_mutex); aoqi@0: return res; aoqi@0: } aoqi@0: aoqi@0: void* os::get_default_process_handle() { aoqi@0: return (void*)::dlopen(NULL, RTLD_LAZY); aoqi@0: } aoqi@0: aoqi@0: void os::print_dll_info(outputStream *st) { aoqi@0: st->print_cr("Dynamic libraries:"); aoqi@0: LoadedLibraries::print(st); aoqi@0: } aoqi@0: aoqi@0: void os::print_os_info(outputStream* st) { aoqi@0: st->print("OS:"); aoqi@0: aoqi@0: st->print("uname:"); aoqi@0: struct utsname name; aoqi@0: uname(&name); aoqi@0: st->print(name.sysname); st->print(" "); aoqi@0: st->print(name.nodename); st->print(" "); aoqi@0: st->print(name.release); st->print(" "); aoqi@0: st->print(name.version); st->print(" "); aoqi@0: st->print(name.machine); aoqi@0: st->cr(); aoqi@0: aoqi@0: // rlimit aoqi@0: st->print("rlimit:"); aoqi@0: struct rlimit rlim; aoqi@0: aoqi@0: st->print(" STACK "); aoqi@0: getrlimit(RLIMIT_STACK, &rlim); aoqi@0: if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); aoqi@0: else st->print("%uk", rlim.rlim_cur >> 10); aoqi@0: aoqi@0: st->print(", CORE "); aoqi@0: getrlimit(RLIMIT_CORE, &rlim); aoqi@0: if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); aoqi@0: else st->print("%uk", rlim.rlim_cur >> 10); aoqi@0: aoqi@0: st->print(", NPROC "); aoqi@0: st->print("%d", sysconf(_SC_CHILD_MAX)); aoqi@0: aoqi@0: st->print(", NOFILE "); aoqi@0: getrlimit(RLIMIT_NOFILE, &rlim); aoqi@0: if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); aoqi@0: else st->print("%d", rlim.rlim_cur); aoqi@0: aoqi@0: st->print(", AS "); aoqi@0: getrlimit(RLIMIT_AS, &rlim); aoqi@0: if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); aoqi@0: else st->print("%uk", rlim.rlim_cur >> 10); aoqi@0: aoqi@0: // Print limits on DATA, because it limits the C-heap. aoqi@0: st->print(", DATA "); aoqi@0: getrlimit(RLIMIT_DATA, &rlim); aoqi@0: if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); aoqi@0: else st->print("%uk", rlim.rlim_cur >> 10); aoqi@0: st->cr(); aoqi@0: aoqi@0: // load average aoqi@0: st->print("load average:"); aoqi@0: double loadavg[3] = {-1.L, -1.L, -1.L}; aoqi@0: os::loadavg(loadavg, 3); aoqi@0: st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]); aoqi@0: st->cr(); aoqi@0: } aoqi@0: aoqi@0: void os::print_memory_info(outputStream* st) { aoqi@0: aoqi@0: st->print_cr("Memory:"); aoqi@0: aoqi@0: st->print_cr(" default page size: %s", describe_pagesize(os::vm_page_size())); aoqi@0: st->print_cr(" default stack page size: %s", describe_pagesize(os::vm_page_size())); aoqi@0: st->print_cr(" default shm page size: %s", describe_pagesize(os::Aix::shm_default_page_size())); aoqi@0: st->print_cr(" can use 64K pages dynamically: %s", (os::Aix::can_use_64K_pages() ? "yes" :"no")); aoqi@0: st->print_cr(" can use 16M pages dynamically: %s", (os::Aix::can_use_16M_pages() ? "yes" :"no")); aoqi@0: if (g_multipage_error != 0) { aoqi@0: st->print_cr(" multipage error: %d", g_multipage_error); aoqi@0: } aoqi@0: aoqi@0: // print out LDR_CNTRL because it affects the default page sizes aoqi@0: const char* const ldr_cntrl = ::getenv("LDR_CNTRL"); aoqi@0: st->print_cr(" LDR_CNTRL=%s.", ldr_cntrl ? ldr_cntrl : ""); aoqi@0: aoqi@0: const char* const extshm = ::getenv("EXTSHM"); aoqi@0: st->print_cr(" EXTSHM=%s.", extshm ? extshm : ""); aoqi@0: aoqi@0: // Call os::Aix::get_meminfo() to retrieve memory statistics. aoqi@0: os::Aix::meminfo_t mi; aoqi@0: if (os::Aix::get_meminfo(&mi)) { aoqi@0: char buffer[256]; aoqi@0: if (os::Aix::on_aix()) { aoqi@0: jio_snprintf(buffer, sizeof(buffer), aoqi@0: " physical total : %llu\n" aoqi@0: " physical free : %llu\n" aoqi@0: " swap total : %llu\n" aoqi@0: " swap free : %llu\n", aoqi@0: mi.real_total, aoqi@0: mi.real_free, aoqi@0: mi.pgsp_total, aoqi@0: mi.pgsp_free); aoqi@0: } else { aoqi@0: Unimplemented(); aoqi@0: } aoqi@0: st->print_raw(buffer); aoqi@0: } else { aoqi@0: st->print_cr(" (no more information available)"); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: void os::pd_print_cpu_info(outputStream* st) { aoqi@0: // cpu aoqi@0: st->print("CPU:"); aoqi@0: st->print("total %d", os::processor_count()); aoqi@0: // It's not safe to query number of active processors after crash aoqi@0: // st->print("(active %d)", os::active_processor_count()); aoqi@0: st->print(" %s", VM_Version::cpu_features()); aoqi@0: st->cr(); aoqi@0: } aoqi@0: aoqi@0: void os::print_siginfo(outputStream* st, void* siginfo) { aoqi@0: // Use common posix version. aoqi@0: os::Posix::print_siginfo_brief(st, (const siginfo_t*) siginfo); aoqi@0: st->cr(); aoqi@0: } aoqi@0: aoqi@0: aoqi@0: static void print_signal_handler(outputStream* st, int sig, aoqi@0: char* buf, size_t buflen); aoqi@0: aoqi@0: void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { aoqi@0: st->print_cr("Signal Handlers:"); aoqi@0: print_signal_handler(st, SIGSEGV, buf, buflen); aoqi@0: print_signal_handler(st, SIGBUS , buf, buflen); aoqi@0: print_signal_handler(st, SIGFPE , buf, buflen); aoqi@0: print_signal_handler(st, SIGPIPE, buf, buflen); aoqi@0: print_signal_handler(st, SIGXFSZ, buf, buflen); aoqi@0: print_signal_handler(st, SIGILL , buf, buflen); aoqi@0: print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); aoqi@0: print_signal_handler(st, SR_signum, buf, buflen); aoqi@0: print_signal_handler(st, SHUTDOWN1_SIGNAL, buf, buflen); aoqi@0: print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); aoqi@0: print_signal_handler(st, SHUTDOWN3_SIGNAL , buf, buflen); aoqi@0: print_signal_handler(st, BREAK_SIGNAL, buf, buflen); aoqi@0: print_signal_handler(st, SIGTRAP, buf, buflen); aoqi@0: print_signal_handler(st, SIGDANGER, buf, buflen); aoqi@0: } aoqi@0: aoqi@0: static char saved_jvm_path[MAXPATHLEN] = {0}; aoqi@0: aoqi@0: // Find the full path to the current module, libjvm.so or libjvm_g.so aoqi@0: void os::jvm_path(char *buf, jint buflen) { aoqi@0: // Error checking. aoqi@0: if (buflen < MAXPATHLEN) { aoqi@0: assert(false, "must use a large-enough buffer"); aoqi@0: buf[0] = '\0'; aoqi@0: return; aoqi@0: } aoqi@0: // Lazy resolve the path to current module. aoqi@0: if (saved_jvm_path[0] != 0) { aoqi@0: strcpy(buf, saved_jvm_path); aoqi@0: return; aoqi@0: } aoqi@0: aoqi@0: Dl_info dlinfo; aoqi@0: int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); aoqi@0: assert(ret != 0, "cannot locate libjvm"); aoqi@0: char* rp = realpath((char *)dlinfo.dli_fname, buf); aoqi@0: assert(rp != NULL, "error in realpath(): maybe the 'path' argument is too long?"); aoqi@0: aoqi@0: strcpy(saved_jvm_path, buf); aoqi@0: } aoqi@0: aoqi@0: void os::print_jni_name_prefix_on(outputStream* st, int args_size) { aoqi@0: // no prefix required, not even "_" aoqi@0: } aoqi@0: aoqi@0: void os::print_jni_name_suffix_on(outputStream* st, int args_size) { aoqi@0: // no suffix required aoqi@0: } aoqi@0: aoqi@0: //////////////////////////////////////////////////////////////////////////////// aoqi@0: // sun.misc.Signal support aoqi@0: aoqi@0: static volatile jint sigint_count = 0; aoqi@0: aoqi@0: static void aoqi@0: UserHandler(int sig, void *siginfo, void *context) { aoqi@0: // 4511530 - sem_post is serialized and handled by the manager thread. When aoqi@0: // the program is interrupted by Ctrl-C, SIGINT is sent to every thread. We aoqi@0: // don't want to flood the manager thread with sem_post requests. aoqi@0: if (sig == SIGINT && Atomic::add(1, &sigint_count) > 1) aoqi@0: return; aoqi@0: aoqi@0: // Ctrl-C is pressed during error reporting, likely because the error aoqi@0: // handler fails to abort. Let VM die immediately. aoqi@0: if (sig == SIGINT && is_error_reported()) { aoqi@0: os::die(); aoqi@0: } aoqi@0: aoqi@0: os::signal_notify(sig); aoqi@0: } aoqi@0: aoqi@0: void* os::user_handler() { aoqi@0: return CAST_FROM_FN_PTR(void*, UserHandler); aoqi@0: } aoqi@0: aoqi@0: extern "C" { aoqi@0: typedef void (*sa_handler_t)(int); aoqi@0: typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); aoqi@0: } aoqi@0: aoqi@0: void* os::signal(int signal_number, void* handler) { aoqi@0: struct sigaction sigAct, oldSigAct; aoqi@0: aoqi@0: sigfillset(&(sigAct.sa_mask)); aoqi@0: aoqi@0: // Do not block out synchronous signals in the signal handler. aoqi@0: // Blocking synchronous signals only makes sense if you can really aoqi@0: // be sure that those signals won't happen during signal handling, aoqi@0: // when the blocking applies. Normal signal handlers are lean and aoqi@0: // do not cause signals. But our signal handlers tend to be "risky" aoqi@0: // - secondary SIGSEGV, SIGILL, SIGBUS' may and do happen. aoqi@0: // On AIX, PASE there was a case where a SIGSEGV happened, followed aoqi@0: // by a SIGILL, which was blocked due to the signal mask. The process aoqi@0: // just hung forever. Better to crash from a secondary signal than to hang. aoqi@0: sigdelset(&(sigAct.sa_mask), SIGSEGV); aoqi@0: sigdelset(&(sigAct.sa_mask), SIGBUS); aoqi@0: sigdelset(&(sigAct.sa_mask), SIGILL); aoqi@0: sigdelset(&(sigAct.sa_mask), SIGFPE); aoqi@0: sigdelset(&(sigAct.sa_mask), SIGTRAP); aoqi@0: aoqi@0: sigAct.sa_flags = SA_RESTART|SA_SIGINFO; aoqi@0: aoqi@0: sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); aoqi@0: aoqi@0: if (sigaction(signal_number, &sigAct, &oldSigAct)) { aoqi@0: // -1 means registration failed aoqi@0: return (void *)-1; aoqi@0: } aoqi@0: aoqi@0: return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); aoqi@0: } aoqi@0: aoqi@0: void os::signal_raise(int signal_number) { aoqi@0: ::raise(signal_number); aoqi@0: } aoqi@0: aoqi@0: // aoqi@0: // The following code is moved from os.cpp for making this aoqi@0: // code platform specific, which it is by its very nature. aoqi@0: // aoqi@0: aoqi@0: // Will be modified when max signal is changed to be dynamic aoqi@0: int os::sigexitnum_pd() { aoqi@0: return NSIG; aoqi@0: } aoqi@0: aoqi@0: // a counter for each possible signal value aoqi@0: static volatile jint pending_signals[NSIG+1] = { 0 }; aoqi@0: aoqi@0: // Linux(POSIX) specific hand shaking semaphore. aoqi@0: static sem_t sig_sem; aoqi@0: aoqi@0: void os::signal_init_pd() { aoqi@0: // Initialize signal structures aoqi@0: ::memset((void*)pending_signals, 0, sizeof(pending_signals)); aoqi@0: aoqi@0: // Initialize signal semaphore aoqi@0: int rc = ::sem_init(&sig_sem, 0, 0); aoqi@0: guarantee(rc != -1, "sem_init failed"); aoqi@0: } aoqi@0: aoqi@0: void os::signal_notify(int sig) { aoqi@0: Atomic::inc(&pending_signals[sig]); aoqi@0: ::sem_post(&sig_sem); aoqi@0: } aoqi@0: aoqi@0: static int check_pending_signals(bool wait) { aoqi@0: Atomic::store(0, &sigint_count); aoqi@0: for (;;) { aoqi@0: for (int i = 0; i < NSIG + 1; i++) { aoqi@0: jint n = pending_signals[i]; aoqi@0: if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { aoqi@0: return i; aoqi@0: } aoqi@0: } aoqi@0: if (!wait) { aoqi@0: return -1; aoqi@0: } aoqi@0: JavaThread *thread = JavaThread::current(); aoqi@0: ThreadBlockInVM tbivm(thread); aoqi@0: aoqi@0: bool threadIsSuspended; aoqi@0: do { aoqi@0: thread->set_suspend_equivalent(); aoqi@0: // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() aoqi@0: aoqi@0: ::sem_wait(&sig_sem); aoqi@0: aoqi@0: // were we externally suspended while we were waiting? aoqi@0: threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); aoqi@0: if (threadIsSuspended) { aoqi@0: // aoqi@0: // The semaphore has been incremented, but while we were waiting aoqi@0: // another thread suspended us. We don't want to continue running aoqi@0: // while suspended because that would surprise the thread that aoqi@0: // suspended us. aoqi@0: // aoqi@0: ::sem_post(&sig_sem); aoqi@0: aoqi@0: thread->java_suspend_self(); aoqi@0: } aoqi@0: } while (threadIsSuspended); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: int os::signal_lookup() { aoqi@0: return check_pending_signals(false); aoqi@0: } aoqi@0: aoqi@0: int os::signal_wait() { aoqi@0: return check_pending_signals(true); aoqi@0: } aoqi@0: aoqi@0: //////////////////////////////////////////////////////////////////////////////// aoqi@0: // Virtual Memory aoqi@0: aoqi@0: // AddrRange describes an immutable address range aoqi@0: // aoqi@0: // This is a helper class for the 'shared memory bookkeeping' below. aoqi@0: class AddrRange { aoqi@0: friend class ShmBkBlock; aoqi@0: aoqi@0: char* _start; aoqi@0: size_t _size; aoqi@0: aoqi@0: public: aoqi@0: aoqi@0: AddrRange(char* start, size_t size) aoqi@0: : _start(start), _size(size) aoqi@0: {} aoqi@0: aoqi@0: AddrRange(const AddrRange& r) aoqi@0: : _start(r.start()), _size(r.size()) aoqi@0: {} aoqi@0: aoqi@0: char* start() const { return _start; } aoqi@0: size_t size() const { return _size; } aoqi@0: char* end() const { return _start + _size; } aoqi@0: bool is_empty() const { return _size == 0 ? true : false; } aoqi@0: aoqi@0: static AddrRange empty_range() { return AddrRange(NULL, 0); } aoqi@0: aoqi@0: bool contains(const char* p) const { aoqi@0: return start() <= p && end() > p; aoqi@0: } aoqi@0: aoqi@0: bool contains(const AddrRange& range) const { aoqi@0: return start() <= range.start() && end() >= range.end(); aoqi@0: } aoqi@0: aoqi@0: bool intersects(const AddrRange& range) const { aoqi@0: return (range.start() <= start() && range.end() > start()) || aoqi@0: (range.start() < end() && range.end() >= end()) || aoqi@0: contains(range); aoqi@0: } aoqi@0: aoqi@0: bool is_same_range(const AddrRange& range) const { aoqi@0: return start() == range.start() && size() == range.size(); aoqi@0: } aoqi@0: aoqi@0: // return the closest inside range consisting of whole pages aoqi@0: AddrRange find_closest_aligned_range(size_t pagesize) const { aoqi@0: if (pagesize == 0 || is_empty()) { aoqi@0: return empty_range(); aoqi@0: } aoqi@0: char* const from = (char*)align_size_up((intptr_t)_start, pagesize); aoqi@0: char* const to = (char*)align_size_down((intptr_t)end(), pagesize); aoqi@0: if (from > to) { aoqi@0: return empty_range(); aoqi@0: } aoqi@0: return AddrRange(from, to - from); aoqi@0: } aoqi@0: }; aoqi@0: aoqi@0: //////////////////////////////////////////////////////////////////////////// aoqi@0: // shared memory bookkeeping aoqi@0: // aoqi@0: // the os::reserve_memory() API and friends hand out different kind of memory, depending aoqi@0: // on need and circumstances. Memory may be allocated with mmap() or with shmget/shmat. aoqi@0: // aoqi@0: // But these memory types have to be treated differently. For example, to uncommit aoqi@0: // mmap-based memory, msync(MS_INVALIDATE) is needed, to uncommit shmat-based memory, aoqi@0: // disclaim64() is needed. aoqi@0: // aoqi@0: // Therefore we need to keep track of the allocated memory segments and their aoqi@0: // properties. aoqi@0: aoqi@0: // ShmBkBlock: base class for all blocks in the shared memory bookkeeping aoqi@0: class ShmBkBlock { aoqi@0: aoqi@0: ShmBkBlock* _next; aoqi@0: aoqi@0: protected: aoqi@0: aoqi@0: AddrRange _range; aoqi@0: const size_t _pagesize; aoqi@0: const bool _pinned; aoqi@0: aoqi@0: public: aoqi@0: aoqi@0: ShmBkBlock(AddrRange range, size_t pagesize, bool pinned) aoqi@0: : _range(range), _pagesize(pagesize), _pinned(pinned) , _next(NULL) { aoqi@0: aoqi@0: assert(_pagesize == SIZE_4K || _pagesize == SIZE_64K || _pagesize == SIZE_16M, "invalid page size"); aoqi@0: assert(!_range.is_empty(), "invalid range"); aoqi@0: } aoqi@0: aoqi@0: virtual void print(outputStream* st) const { aoqi@0: st->print("0x%p ... 0x%p (%llu) - %d %s pages - %s", aoqi@0: _range.start(), _range.end(), _range.size(), aoqi@0: _range.size() / _pagesize, describe_pagesize(_pagesize), aoqi@0: _pinned ? "pinned" : ""); aoqi@0: } aoqi@0: aoqi@0: enum Type { MMAP, SHMAT }; aoqi@0: virtual Type getType() = 0; aoqi@0: aoqi@0: char* base() const { return _range.start(); } aoqi@0: size_t size() const { return _range.size(); } aoqi@0: aoqi@0: void setAddrRange(AddrRange range) { aoqi@0: _range = range; aoqi@0: } aoqi@0: aoqi@0: bool containsAddress(const char* p) const { aoqi@0: return _range.contains(p); aoqi@0: } aoqi@0: aoqi@0: bool containsRange(const char* p, size_t size) const { aoqi@0: return _range.contains(AddrRange((char*)p, size)); aoqi@0: } aoqi@0: aoqi@0: bool isSameRange(const char* p, size_t size) const { aoqi@0: return _range.is_same_range(AddrRange((char*)p, size)); aoqi@0: } aoqi@0: aoqi@0: virtual bool disclaim(char* p, size_t size) = 0; aoqi@0: virtual bool release() = 0; aoqi@0: aoqi@0: // blocks live in a list. aoqi@0: ShmBkBlock* next() const { return _next; } aoqi@0: void set_next(ShmBkBlock* blk) { _next = blk; } aoqi@0: aoqi@0: }; // end: ShmBkBlock aoqi@0: aoqi@0: aoqi@0: // ShmBkMappedBlock: describes an block allocated with mmap() aoqi@0: class ShmBkMappedBlock : public ShmBkBlock { aoqi@0: public: aoqi@0: aoqi@0: ShmBkMappedBlock(AddrRange range) aoqi@0: : ShmBkBlock(range, SIZE_4K, false) {} // mmap: always 4K, never pinned aoqi@0: aoqi@0: void print(outputStream* st) const { aoqi@0: ShmBkBlock::print(st); aoqi@0: st->print_cr(" - mmap'ed"); aoqi@0: } aoqi@0: aoqi@0: Type getType() { aoqi@0: return MMAP; aoqi@0: } aoqi@0: aoqi@0: bool disclaim(char* p, size_t size) { aoqi@0: aoqi@0: AddrRange r(p, size); aoqi@0: aoqi@0: guarantee(_range.contains(r), "invalid disclaim"); aoqi@0: aoqi@0: // only disclaim whole ranges. aoqi@0: const AddrRange r2 = r.find_closest_aligned_range(_pagesize); aoqi@0: if (r2.is_empty()) { aoqi@0: return true; aoqi@0: } aoqi@0: aoqi@0: const int rc = ::msync(r2.start(), r2.size(), MS_INVALIDATE); aoqi@0: aoqi@0: if (rc != 0) { aoqi@0: warning("msync(0x%p, %llu, MS_INVALIDATE) failed (%d)\n", r2.start(), r2.size(), errno); aoqi@0: } aoqi@0: aoqi@0: return rc == 0 ? true : false; aoqi@0: } aoqi@0: aoqi@0: bool release() { aoqi@0: // mmap'ed blocks are released using munmap aoqi@0: if (::munmap(_range.start(), _range.size()) != 0) { aoqi@0: warning("munmap(0x%p, %llu) failed (%d)\n", _range.start(), _range.size(), errno); aoqi@0: return false; aoqi@0: } aoqi@0: return true; aoqi@0: } aoqi@0: }; // end: ShmBkMappedBlock aoqi@0: aoqi@0: // ShmBkShmatedBlock: describes an block allocated with shmget/shmat() aoqi@0: class ShmBkShmatedBlock : public ShmBkBlock { aoqi@0: public: aoqi@0: aoqi@0: ShmBkShmatedBlock(AddrRange range, size_t pagesize, bool pinned) aoqi@0: : ShmBkBlock(range, pagesize, pinned) {} aoqi@0: aoqi@0: void print(outputStream* st) const { aoqi@0: ShmBkBlock::print(st); aoqi@0: st->print_cr(" - shmat'ed"); aoqi@0: } aoqi@0: aoqi@0: Type getType() { aoqi@0: return SHMAT; aoqi@0: } aoqi@0: aoqi@0: bool disclaim(char* p, size_t size) { aoqi@0: aoqi@0: AddrRange r(p, size); aoqi@0: aoqi@0: if (_pinned) { aoqi@0: return true; aoqi@0: } aoqi@0: aoqi@0: // shmat'ed blocks are disclaimed using disclaim64 aoqi@0: guarantee(_range.contains(r), "invalid disclaim"); aoqi@0: aoqi@0: // only disclaim whole ranges. aoqi@0: const AddrRange r2 = r.find_closest_aligned_range(_pagesize); aoqi@0: if (r2.is_empty()) { aoqi@0: return true; aoqi@0: } aoqi@0: aoqi@0: const bool rc = my_disclaim64(r2.start(), r2.size()); aoqi@0: aoqi@0: if (Verbose && !rc) { aoqi@0: warning("failed to disclaim shm %p-%p\n", r2.start(), r2.end()); aoqi@0: } aoqi@0: aoqi@0: return rc; aoqi@0: } aoqi@0: aoqi@0: bool release() { aoqi@0: bool rc = false; aoqi@0: if (::shmdt(_range.start()) != 0) { aoqi@0: warning("shmdt(0x%p) failed (%d)\n", _range.start(), errno); aoqi@0: } else { aoqi@0: rc = true; aoqi@0: } aoqi@0: return rc; aoqi@0: } aoqi@0: aoqi@0: }; // end: ShmBkShmatedBlock aoqi@0: aoqi@0: static ShmBkBlock* g_shmbk_list = NULL; aoqi@0: static volatile jint g_shmbk_table_lock = 0; aoqi@0: aoqi@0: // keep some usage statistics aoqi@0: static struct { aoqi@0: int nodes; // number of nodes in list aoqi@0: size_t bytes; // reserved - not committed - bytes. aoqi@0: int reserves; // how often reserve was called aoqi@0: int lookups; // how often a lookup was made aoqi@0: } g_shmbk_stats = { 0, 0, 0, 0 }; aoqi@0: aoqi@0: // add information about a shared memory segment to the bookkeeping aoqi@0: static void shmbk_register(ShmBkBlock* p_block) { aoqi@0: guarantee(p_block, "logic error"); aoqi@0: p_block->set_next(g_shmbk_list); aoqi@0: g_shmbk_list = p_block; aoqi@0: g_shmbk_stats.reserves ++; aoqi@0: g_shmbk_stats.bytes += p_block->size(); aoqi@0: g_shmbk_stats.nodes ++; aoqi@0: } aoqi@0: aoqi@0: // remove information about a shared memory segment by its starting address aoqi@0: static void shmbk_unregister(ShmBkBlock* p_block) { aoqi@0: ShmBkBlock* p = g_shmbk_list; aoqi@0: ShmBkBlock* prev = NULL; aoqi@0: while (p) { aoqi@0: if (p == p_block) { aoqi@0: if (prev) { aoqi@0: prev->set_next(p->next()); aoqi@0: } else { aoqi@0: g_shmbk_list = p->next(); aoqi@0: } aoqi@0: g_shmbk_stats.nodes --; aoqi@0: g_shmbk_stats.bytes -= p->size(); aoqi@0: return; aoqi@0: } aoqi@0: prev = p; aoqi@0: p = p->next(); aoqi@0: } aoqi@0: assert(false, "should not happen"); aoqi@0: } aoqi@0: aoqi@0: // given a pointer, return shared memory bookkeeping record for the segment it points into aoqi@0: // using the returned block info must happen under lock protection aoqi@0: static ShmBkBlock* shmbk_find_by_containing_address(const char* addr) { aoqi@0: g_shmbk_stats.lookups ++; aoqi@0: ShmBkBlock* p = g_shmbk_list; aoqi@0: while (p) { aoqi@0: if (p->containsAddress(addr)) { aoqi@0: return p; aoqi@0: } aoqi@0: p = p->next(); aoqi@0: } aoqi@0: return NULL; aoqi@0: } aoqi@0: aoqi@0: // dump all information about all memory segments allocated with os::reserve_memory() aoqi@0: void shmbk_dump_info() { aoqi@0: tty->print_cr("-- shared mem bookkeeping (alive: %d segments, %llu bytes, " aoqi@0: "total reserves: %d total lookups: %d)", aoqi@0: g_shmbk_stats.nodes, g_shmbk_stats.bytes, g_shmbk_stats.reserves, g_shmbk_stats.lookups); aoqi@0: const ShmBkBlock* p = g_shmbk_list; aoqi@0: int i = 0; aoqi@0: while (p) { aoqi@0: p->print(tty); aoqi@0: p = p->next(); aoqi@0: i ++; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: #define LOCK_SHMBK { ThreadCritical _LOCK_SHMBK; aoqi@0: #define UNLOCK_SHMBK } aoqi@0: aoqi@0: // End: shared memory bookkeeping aoqi@0: //////////////////////////////////////////////////////////////////////////////////////////////////// aoqi@0: aoqi@0: int os::vm_page_size() { aoqi@0: // Seems redundant as all get out aoqi@0: assert(os::Aix::page_size() != -1, "must call os::init"); aoqi@0: return os::Aix::page_size(); aoqi@0: } aoqi@0: aoqi@0: // Aix allocates memory by pages. aoqi@0: int os::vm_allocation_granularity() { aoqi@0: assert(os::Aix::page_size() != -1, "must call os::init"); aoqi@0: return os::Aix::page_size(); aoqi@0: } aoqi@0: aoqi@0: int os::Aix::commit_memory_impl(char* addr, size_t size, bool exec) { aoqi@0: aoqi@0: // Commit is a noop. There is no explicit commit aoqi@0: // needed on AIX. Memory is committed when touched. aoqi@0: // aoqi@0: // Debug : check address range for validity aoqi@0: #ifdef ASSERT aoqi@0: LOCK_SHMBK aoqi@0: ShmBkBlock* const block = shmbk_find_by_containing_address(addr); aoqi@0: if (!block) { aoqi@0: fprintf(stderr, "invalid pointer: " INTPTR_FORMAT "\n", addr); aoqi@0: shmbk_dump_info(); aoqi@0: assert(false, "invalid pointer"); aoqi@0: return false; aoqi@0: } else if (!block->containsRange(addr, size)) { aoqi@0: fprintf(stderr, "invalid range: " INTPTR_FORMAT " .. " INTPTR_FORMAT "\n", addr, addr + size); aoqi@0: shmbk_dump_info(); aoqi@0: assert(false, "invalid range"); aoqi@0: return false; aoqi@0: } aoqi@0: UNLOCK_SHMBK aoqi@0: #endif // ASSERT aoqi@0: aoqi@0: return 0; aoqi@0: } aoqi@0: aoqi@0: bool os::pd_commit_memory(char* addr, size_t size, bool exec) { aoqi@0: return os::Aix::commit_memory_impl(addr, size, exec) == 0; aoqi@0: } aoqi@0: aoqi@0: void os::pd_commit_memory_or_exit(char* addr, size_t size, bool exec, aoqi@0: const char* mesg) { aoqi@0: assert(mesg != NULL, "mesg must be specified"); aoqi@0: os::Aix::commit_memory_impl(addr, size, exec); aoqi@0: } aoqi@0: aoqi@0: int os::Aix::commit_memory_impl(char* addr, size_t size, aoqi@0: size_t alignment_hint, bool exec) { aoqi@0: return os::Aix::commit_memory_impl(addr, size, exec); aoqi@0: } aoqi@0: aoqi@0: bool os::pd_commit_memory(char* addr, size_t size, size_t alignment_hint, aoqi@0: bool exec) { aoqi@0: return os::Aix::commit_memory_impl(addr, size, alignment_hint, exec) == 0; aoqi@0: } aoqi@0: aoqi@0: void os::pd_commit_memory_or_exit(char* addr, size_t size, aoqi@0: size_t alignment_hint, bool exec, aoqi@0: const char* mesg) { aoqi@0: os::Aix::commit_memory_impl(addr, size, alignment_hint, exec); aoqi@0: } aoqi@0: aoqi@0: bool os::pd_uncommit_memory(char* addr, size_t size) { aoqi@0: aoqi@0: // Delegate to ShmBkBlock class which knows how to uncommit its memory. aoqi@0: aoqi@0: bool rc = false; aoqi@0: LOCK_SHMBK aoqi@0: ShmBkBlock* const block = shmbk_find_by_containing_address(addr); aoqi@0: if (!block) { aoqi@0: fprintf(stderr, "invalid pointer: 0x%p.\n", addr); aoqi@0: shmbk_dump_info(); aoqi@0: assert(false, "invalid pointer"); aoqi@0: return false; aoqi@0: } else if (!block->containsRange(addr, size)) { aoqi@0: fprintf(stderr, "invalid range: 0x%p .. 0x%p.\n", addr, addr + size); aoqi@0: shmbk_dump_info(); aoqi@0: assert(false, "invalid range"); aoqi@0: return false; aoqi@0: } aoqi@0: rc = block->disclaim(addr, size); aoqi@0: UNLOCK_SHMBK aoqi@0: aoqi@0: if (Verbose && !rc) { aoqi@0: warning("failed to disclaim 0x%p .. 0x%p (0x%llX bytes).", addr, addr + size, size); aoqi@0: } aoqi@0: return rc; aoqi@0: } aoqi@0: aoqi@0: bool os::pd_create_stack_guard_pages(char* addr, size_t size) { aoqi@0: return os::guard_memory(addr, size); aoqi@0: } aoqi@0: aoqi@0: bool os::remove_stack_guard_pages(char* addr, size_t size) { aoqi@0: return os::unguard_memory(addr, size); aoqi@0: } aoqi@0: aoqi@0: void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { aoqi@0: } aoqi@0: aoqi@0: void os::pd_free_memory(char *addr, size_t bytes, size_t alignment_hint) { aoqi@0: } aoqi@0: aoqi@0: void os::numa_make_global(char *addr, size_t bytes) { aoqi@0: } aoqi@0: aoqi@0: void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { aoqi@0: } aoqi@0: aoqi@0: bool os::numa_topology_changed() { aoqi@0: return false; aoqi@0: } aoqi@0: aoqi@0: size_t os::numa_get_groups_num() { aoqi@0: return 1; aoqi@0: } aoqi@0: aoqi@0: int os::numa_get_group_id() { aoqi@0: return 0; aoqi@0: } aoqi@0: aoqi@0: size_t os::numa_get_leaf_groups(int *ids, size_t size) { aoqi@0: if (size > 0) { aoqi@0: ids[0] = 0; aoqi@0: return 1; aoqi@0: } aoqi@0: return 0; aoqi@0: } aoqi@0: aoqi@0: bool os::get_page_info(char *start, page_info* info) { aoqi@0: return false; aoqi@0: } aoqi@0: aoqi@0: char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { aoqi@0: return end; aoqi@0: } aoqi@0: aoqi@0: // Flags for reserve_shmatted_memory: aoqi@0: #define RESSHM_WISHADDR_OR_FAIL 1 aoqi@0: #define RESSHM_TRY_16M_PAGES 2 aoqi@0: #define RESSHM_16M_PAGES_OR_FAIL 4 aoqi@0: aoqi@0: // Result of reserve_shmatted_memory: aoqi@0: struct shmatted_memory_info_t { aoqi@0: char* addr; aoqi@0: size_t pagesize; aoqi@0: bool pinned; aoqi@0: }; aoqi@0: aoqi@0: // Reserve a section of shmatted memory. aoqi@0: // params: aoqi@0: // bytes [in]: size of memory, in bytes aoqi@0: // requested_addr [in]: wish address. aoqi@0: // NULL = no wish. aoqi@0: // If RESSHM_WISHADDR_OR_FAIL is set in flags and wish address cannot aoqi@0: // be obtained, function will fail. Otherwise wish address is treated as hint and aoqi@0: // another pointer is returned. aoqi@0: // flags [in]: some flags. Valid flags are: aoqi@0: // RESSHM_WISHADDR_OR_FAIL - fail if wish address is given and cannot be obtained. aoqi@0: // RESSHM_TRY_16M_PAGES - try to allocate from 16M page pool aoqi@0: // (requires UseLargePages and Use16MPages) aoqi@0: // RESSHM_16M_PAGES_OR_FAIL - if you cannot allocate from 16M page pool, fail. aoqi@0: // Otherwise any other page size will do. aoqi@0: // p_info [out] : holds information about the created shared memory segment. aoqi@0: static bool reserve_shmatted_memory(size_t bytes, char* requested_addr, int flags, shmatted_memory_info_t* p_info) { aoqi@0: aoqi@0: assert(p_info, "parameter error"); aoqi@0: aoqi@0: // init output struct. aoqi@0: p_info->addr = NULL; aoqi@0: aoqi@0: // neither should we be here for EXTSHM=ON. aoqi@0: if (os::Aix::extshm()) { aoqi@0: ShouldNotReachHere(); aoqi@0: } aoqi@0: aoqi@0: // extract flags. sanity checks. aoqi@0: const bool wishaddr_or_fail = aoqi@0: flags & RESSHM_WISHADDR_OR_FAIL; aoqi@0: const bool try_16M_pages = aoqi@0: flags & RESSHM_TRY_16M_PAGES; aoqi@0: const bool f16M_pages_or_fail = aoqi@0: flags & RESSHM_16M_PAGES_OR_FAIL; aoqi@0: aoqi@0: // first check: if a wish address is given and it is mandatory, but not aligned to segment boundary, aoqi@0: // shmat will fail anyway, so save some cycles by failing right away aoqi@0: if (requested_addr && ((uintptr_t)requested_addr % SIZE_256M == 0)) { aoqi@0: if (wishaddr_or_fail) { aoqi@0: return false; aoqi@0: } else { aoqi@0: requested_addr = NULL; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: char* addr = NULL; aoqi@0: aoqi@0: // Align size of shm up to the largest possible page size, to avoid errors later on when we try to change aoqi@0: // pagesize dynamically. aoqi@0: const size_t size = align_size_up(bytes, SIZE_16M); aoqi@0: aoqi@0: // reserve the shared segment aoqi@0: int shmid = shmget(IPC_PRIVATE, size, IPC_CREAT | S_IRUSR | S_IWUSR); aoqi@0: if (shmid == -1) { aoqi@0: warning("shmget(.., %lld, ..) failed (errno: %d).", size, errno); aoqi@0: return false; aoqi@0: } aoqi@0: aoqi@0: // Important note: aoqi@0: // It is very important that we, upon leaving this function, do not leave a shm segment alive. aoqi@0: // We must right after attaching it remove it from the system. System V shm segments are global and aoqi@0: // survive the process. aoqi@0: // So, from here on: Do not assert. Do not return. Always do a "goto cleanup_shm". aoqi@0: aoqi@0: // try forcing the page size aoqi@0: size_t pagesize = -1; // unknown so far aoqi@0: aoqi@0: if (UseLargePages) { aoqi@0: aoqi@0: struct shmid_ds shmbuf; aoqi@0: memset(&shmbuf, 0, sizeof(shmbuf)); aoqi@0: aoqi@0: // First, try to take from 16M page pool if... aoqi@0: if (os::Aix::can_use_16M_pages() // we can ... aoqi@0: && Use16MPages // we are not explicitly forbidden to do so (-XX:-Use16MPages).. aoqi@0: && try_16M_pages) { // caller wants us to. aoqi@0: shmbuf.shm_pagesize = SIZE_16M; aoqi@0: if (shmctl(shmid, SHM_PAGESIZE, &shmbuf) == 0) { aoqi@0: pagesize = SIZE_16M; aoqi@0: } else { aoqi@0: warning("Failed to allocate %d 16M pages. 16M page pool might be exhausted. (shmctl failed with %d)", aoqi@0: size / SIZE_16M, errno); aoqi@0: if (f16M_pages_or_fail) { aoqi@0: goto cleanup_shm; aoqi@0: } aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // Nothing yet? Try setting 64K pages. Note that I never saw this fail, but in theory it might, aoqi@0: // because the 64K page pool may also be exhausted. aoqi@0: if (pagesize == -1) { aoqi@0: shmbuf.shm_pagesize = SIZE_64K; aoqi@0: if (shmctl(shmid, SHM_PAGESIZE, &shmbuf) == 0) { aoqi@0: pagesize = SIZE_64K; aoqi@0: } else { aoqi@0: warning("Failed to allocate %d 64K pages. (shmctl failed with %d)", aoqi@0: size / SIZE_64K, errno); aoqi@0: // here I give up. leave page_size -1 - later, after attaching, we will query the aoqi@0: // real page size of the attached memory. (in theory, it may be something different aoqi@0: // from 4K if LDR_CNTRL SHM_PSIZE is set) aoqi@0: } aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // sanity point aoqi@0: assert(pagesize == -1 || pagesize == SIZE_16M || pagesize == SIZE_64K, "wrong page size"); aoqi@0: aoqi@0: // Now attach the shared segment. aoqi@0: addr = (char*) shmat(shmid, requested_addr, 0); aoqi@0: if (addr == (char*)-1) { aoqi@0: // How to handle attach failure: aoqi@0: // If it failed for a specific wish address, tolerate this: in that case, if wish address was aoqi@0: // mandatory, fail, if not, retry anywhere. aoqi@0: // If it failed for any other reason, treat that as fatal error. aoqi@0: addr = NULL; aoqi@0: if (requested_addr) { aoqi@0: if (wishaddr_or_fail) { aoqi@0: goto cleanup_shm; aoqi@0: } else { aoqi@0: addr = (char*) shmat(shmid, NULL, 0); aoqi@0: if (addr == (char*)-1) { // fatal aoqi@0: addr = NULL; aoqi@0: warning("shmat failed (errno: %d)", errno); aoqi@0: goto cleanup_shm; aoqi@0: } aoqi@0: } aoqi@0: } else { // fatal aoqi@0: addr = NULL; aoqi@0: warning("shmat failed (errno: %d)", errno); aoqi@0: goto cleanup_shm; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // sanity point aoqi@0: assert(addr && addr != (char*) -1, "wrong address"); aoqi@0: aoqi@0: // after successful Attach remove the segment - right away. aoqi@0: if (::shmctl(shmid, IPC_RMID, NULL) == -1) { aoqi@0: warning("shmctl(%u, IPC_RMID) failed (%d)\n", shmid, errno); aoqi@0: guarantee(false, "failed to remove shared memory segment!"); aoqi@0: } aoqi@0: shmid = -1; aoqi@0: aoqi@0: // query the real page size. In case setting the page size did not work (see above), the system aoqi@0: // may have given us something other then 4K (LDR_CNTRL) aoqi@0: { aoqi@0: const size_t real_pagesize = os::Aix::query_pagesize(addr); aoqi@0: if (pagesize != -1) { aoqi@0: assert(pagesize == real_pagesize, "unexpected pagesize after shmat"); aoqi@0: } else { aoqi@0: pagesize = real_pagesize; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // Now register the reserved block with internal book keeping. aoqi@0: LOCK_SHMBK aoqi@0: const bool pinned = pagesize >= SIZE_16M ? true : false; aoqi@0: ShmBkShmatedBlock* const p_block = new ShmBkShmatedBlock(AddrRange(addr, size), pagesize, pinned); aoqi@0: assert(p_block, ""); aoqi@0: shmbk_register(p_block); aoqi@0: UNLOCK_SHMBK aoqi@0: aoqi@0: cleanup_shm: aoqi@0: aoqi@0: // if we have not done so yet, remove the shared memory segment. This is very important. aoqi@0: if (shmid != -1) { aoqi@0: if (::shmctl(shmid, IPC_RMID, NULL) == -1) { aoqi@0: warning("shmctl(%u, IPC_RMID) failed (%d)\n", shmid, errno); aoqi@0: guarantee(false, "failed to remove shared memory segment!"); aoqi@0: } aoqi@0: shmid = -1; aoqi@0: } aoqi@0: aoqi@0: // trace aoqi@0: if (Verbose && !addr) { aoqi@0: if (requested_addr != NULL) { aoqi@0: warning("failed to shm-allocate 0x%llX bytes at wish address 0x%p.", size, requested_addr); aoqi@0: } else { aoqi@0: warning("failed to shm-allocate 0x%llX bytes at any address.", size); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // hand info to caller aoqi@0: if (addr) { aoqi@0: p_info->addr = addr; aoqi@0: p_info->pagesize = pagesize; aoqi@0: p_info->pinned = pagesize == SIZE_16M ? true : false; aoqi@0: } aoqi@0: aoqi@0: // sanity test: aoqi@0: if (requested_addr && addr && wishaddr_or_fail) { aoqi@0: guarantee(addr == requested_addr, "shmat error"); aoqi@0: } aoqi@0: aoqi@0: // just one more test to really make sure we have no dangling shm segments. aoqi@0: guarantee(shmid == -1, "dangling shm segments"); aoqi@0: aoqi@0: return addr ? true : false; aoqi@0: aoqi@0: } // end: reserve_shmatted_memory aoqi@0: aoqi@0: // Reserve memory using mmap. Behaves the same as reserve_shmatted_memory(): aoqi@0: // will return NULL in case of an error. aoqi@0: static char* reserve_mmaped_memory(size_t bytes, char* requested_addr) { aoqi@0: aoqi@0: // if a wish address is given, but not aligned to 4K page boundary, mmap will fail. aoqi@0: if (requested_addr && ((uintptr_t)requested_addr % os::vm_page_size() != 0)) { aoqi@0: warning("Wish address 0x%p not aligned to page boundary.", requested_addr); aoqi@0: return NULL; aoqi@0: } aoqi@0: aoqi@0: const size_t size = align_size_up(bytes, SIZE_4K); aoqi@0: aoqi@0: // Note: MAP_SHARED (instead of MAP_PRIVATE) needed to be able to aoqi@0: // msync(MS_INVALIDATE) (see os::uncommit_memory) aoqi@0: int flags = MAP_ANONYMOUS | MAP_SHARED; aoqi@0: aoqi@0: // MAP_FIXED is needed to enforce requested_addr - manpage is vague about what aoqi@0: // it means if wishaddress is given but MAP_FIXED is not set. aoqi@0: // aoqi@0: // Note however that this changes semantics in SPEC1170 mode insofar as MAP_FIXED aoqi@0: // clobbers the address range, which is probably not what the caller wants. That's aoqi@0: // why I assert here (again) that the SPEC1170 compat mode is off. aoqi@0: // If we want to be able to run under SPEC1170, we have to do some porting and aoqi@0: // testing. aoqi@0: if (requested_addr != NULL) { aoqi@0: assert(!os::Aix::xpg_sus_mode(), "SPEC1170 mode not allowed."); aoqi@0: flags |= MAP_FIXED; aoqi@0: } aoqi@0: aoqi@0: char* addr = (char*)::mmap(requested_addr, size, PROT_READ|PROT_WRITE|PROT_EXEC, flags, -1, 0); aoqi@0: aoqi@0: if (addr == MAP_FAILED) { aoqi@0: // attach failed: tolerate for specific wish addresses. Not being able to attach aoqi@0: // anywhere is a fatal error. aoqi@0: if (requested_addr == NULL) { aoqi@0: // It's ok to fail here if the machine has not enough memory. aoqi@0: warning("mmap(NULL, 0x%llX, ..) failed (%d)", size, errno); aoqi@0: } aoqi@0: addr = NULL; aoqi@0: goto cleanup_mmap; aoqi@0: } aoqi@0: aoqi@0: // If we did request a specific address and that address was not available, fail. aoqi@0: if (addr && requested_addr) { aoqi@0: guarantee(addr == requested_addr, "unexpected"); aoqi@0: } aoqi@0: aoqi@0: // register this mmap'ed segment with book keeping aoqi@0: LOCK_SHMBK aoqi@0: ShmBkMappedBlock* const p_block = new ShmBkMappedBlock(AddrRange(addr, size)); aoqi@0: assert(p_block, ""); aoqi@0: shmbk_register(p_block); aoqi@0: UNLOCK_SHMBK aoqi@0: aoqi@0: cleanup_mmap: aoqi@0: aoqi@0: // trace aoqi@0: if (Verbose) { aoqi@0: if (addr) { aoqi@0: fprintf(stderr, "mmap-allocated 0x%p .. 0x%p (0x%llX bytes)\n", addr, addr + bytes, bytes); aoqi@0: } aoqi@0: else { aoqi@0: if (requested_addr != NULL) { aoqi@0: warning("failed to mmap-allocate 0x%llX bytes at wish address 0x%p.", bytes, requested_addr); aoqi@0: } else { aoqi@0: warning("failed to mmap-allocate 0x%llX bytes at any address.", bytes); aoqi@0: } aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: return addr; aoqi@0: aoqi@0: } // end: reserve_mmaped_memory aoqi@0: aoqi@0: // Reserves and attaches a shared memory segment. aoqi@0: // Will assert if a wish address is given and could not be obtained. aoqi@0: char* os::pd_reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) { aoqi@0: return os::attempt_reserve_memory_at(bytes, requested_addr); aoqi@0: } aoqi@0: aoqi@0: bool os::pd_release_memory(char* addr, size_t size) { aoqi@0: aoqi@0: // delegate to ShmBkBlock class which knows how to uncommit its memory. aoqi@0: aoqi@0: bool rc = false; aoqi@0: LOCK_SHMBK aoqi@0: ShmBkBlock* const block = shmbk_find_by_containing_address(addr); aoqi@0: if (!block) { aoqi@0: fprintf(stderr, "invalid pointer: 0x%p.\n", addr); aoqi@0: shmbk_dump_info(); aoqi@0: assert(false, "invalid pointer"); aoqi@0: return false; aoqi@0: } aoqi@0: else if (!block->isSameRange(addr, size)) { aoqi@0: if (block->getType() == ShmBkBlock::MMAP) { aoqi@0: // Release only the same range or a the beginning or the end of a range. aoqi@0: if (block->base() == addr && size < block->size()) { aoqi@0: ShmBkMappedBlock* const b = new ShmBkMappedBlock(AddrRange(block->base() + size, block->size() - size)); aoqi@0: assert(b, ""); aoqi@0: shmbk_register(b); aoqi@0: block->setAddrRange(AddrRange(addr, size)); aoqi@0: } aoqi@0: else if (addr > block->base() && addr + size == block->base() + block->size()) { aoqi@0: ShmBkMappedBlock* const b = new ShmBkMappedBlock(AddrRange(block->base(), block->size() - size)); aoqi@0: assert(b, ""); aoqi@0: shmbk_register(b); aoqi@0: block->setAddrRange(AddrRange(addr, size)); aoqi@0: } aoqi@0: else { aoqi@0: fprintf(stderr, "invalid mmap range: 0x%p .. 0x%p.\n", addr, addr + size); aoqi@0: shmbk_dump_info(); aoqi@0: assert(false, "invalid mmap range"); aoqi@0: return false; aoqi@0: } aoqi@0: } aoqi@0: else { aoqi@0: // Release only the same range. No partial release allowed. aoqi@0: // Soften the requirement a bit, because the user may think he owns a smaller size aoqi@0: // than the block is due to alignment etc. aoqi@0: if (block->base() != addr || block->size() < size) { aoqi@0: fprintf(stderr, "invalid shmget range: 0x%p .. 0x%p.\n", addr, addr + size); aoqi@0: shmbk_dump_info(); aoqi@0: assert(false, "invalid shmget range"); aoqi@0: return false; aoqi@0: } aoqi@0: } aoqi@0: } aoqi@0: rc = block->release(); aoqi@0: assert(rc, "release failed"); aoqi@0: // remove block from bookkeeping aoqi@0: shmbk_unregister(block); aoqi@0: delete block; aoqi@0: UNLOCK_SHMBK aoqi@0: aoqi@0: if (!rc) { aoqi@0: warning("failed to released %lu bytes at 0x%p", size, addr); aoqi@0: } aoqi@0: aoqi@0: return rc; aoqi@0: } aoqi@0: aoqi@0: static bool checked_mprotect(char* addr, size_t size, int prot) { aoqi@0: aoqi@0: // Little problem here: if SPEC1170 behaviour is off, mprotect() on AIX will aoqi@0: // not tell me if protection failed when trying to protect an un-protectable range. aoqi@0: // aoqi@0: // This means if the memory was allocated using shmget/shmat, protection wont work aoqi@0: // but mprotect will still return 0: aoqi@0: // aoqi@0: // See http://publib.boulder.ibm.com/infocenter/pseries/v5r3/index.jsp?topic=/com.ibm.aix.basetechref/doc/basetrf1/mprotect.htm aoqi@0: aoqi@0: bool rc = ::mprotect(addr, size, prot) == 0 ? true : false; aoqi@0: aoqi@0: if (!rc) { aoqi@0: const char* const s_errno = strerror(errno); aoqi@0: warning("mprotect(" PTR_FORMAT "-" PTR_FORMAT ", 0x%X) failed (%s).", addr, addr + size, prot, s_errno); aoqi@0: return false; aoqi@0: } aoqi@0: aoqi@0: // mprotect success check aoqi@0: // aoqi@0: // Mprotect said it changed the protection but can I believe it? aoqi@0: // aoqi@0: // To be sure I need to check the protection afterwards. Try to aoqi@0: // read from protected memory and check whether that causes a segfault. aoqi@0: // aoqi@0: if (!os::Aix::xpg_sus_mode()) { aoqi@0: aoqi@0: if (StubRoutines::SafeFetch32_stub()) { aoqi@0: aoqi@0: const bool read_protected = aoqi@0: (SafeFetch32((int*)addr, 0x12345678) == 0x12345678 && aoqi@0: SafeFetch32((int*)addr, 0x76543210) == 0x76543210) ? true : false; aoqi@0: aoqi@0: if (prot & PROT_READ) { aoqi@0: rc = !read_protected; aoqi@0: } else { aoqi@0: rc = read_protected; aoqi@0: } aoqi@0: } aoqi@0: } aoqi@0: if (!rc) { aoqi@0: assert(false, "mprotect failed."); aoqi@0: } aoqi@0: return rc; aoqi@0: } aoqi@0: aoqi@0: // Set protections specified aoqi@0: bool os::protect_memory(char* addr, size_t size, ProtType prot, bool is_committed) { aoqi@0: unsigned int p = 0; aoqi@0: switch (prot) { aoqi@0: case MEM_PROT_NONE: p = PROT_NONE; break; aoqi@0: case MEM_PROT_READ: p = PROT_READ; break; aoqi@0: case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; aoqi@0: case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; aoqi@0: default: aoqi@0: ShouldNotReachHere(); aoqi@0: } aoqi@0: // is_committed is unused. aoqi@0: return checked_mprotect(addr, size, p); aoqi@0: } aoqi@0: aoqi@0: bool os::guard_memory(char* addr, size_t size) { aoqi@0: return checked_mprotect(addr, size, PROT_NONE); aoqi@0: } aoqi@0: aoqi@0: bool os::unguard_memory(char* addr, size_t size) { aoqi@0: return checked_mprotect(addr, size, PROT_READ|PROT_WRITE|PROT_EXEC); aoqi@0: } aoqi@0: aoqi@0: // Large page support aoqi@0: aoqi@0: static size_t _large_page_size = 0; aoqi@0: aoqi@0: // Enable large page support if OS allows that. aoqi@0: void os::large_page_init() { aoqi@0: aoqi@0: // Note: os::Aix::query_multipage_support must run first. aoqi@0: aoqi@0: if (!UseLargePages) { aoqi@0: return; aoqi@0: } aoqi@0: aoqi@0: if (!Aix::can_use_64K_pages()) { aoqi@0: assert(!Aix::can_use_16M_pages(), "64K is a precondition for 16M."); aoqi@0: UseLargePages = false; aoqi@0: return; aoqi@0: } aoqi@0: aoqi@0: if (!Aix::can_use_16M_pages() && Use16MPages) { aoqi@0: fprintf(stderr, "Cannot use 16M pages. Please ensure that there is a 16M page pool " aoqi@0: " and that the VM runs with CAP_BYPASS_RAC_VMM and CAP_PROPAGATE capabilities.\n"); aoqi@0: } aoqi@0: aoqi@0: // Do not report 16M page alignment as part of os::_page_sizes if we are aoqi@0: // explicitly forbidden from using 16M pages. Doing so would increase the aoqi@0: // alignment the garbage collector calculates with, slightly increasing aoqi@0: // heap usage. We should only pay for 16M alignment if we really want to aoqi@0: // use 16M pages. aoqi@0: if (Use16MPages && Aix::can_use_16M_pages()) { aoqi@0: _large_page_size = SIZE_16M; aoqi@0: _page_sizes[0] = SIZE_16M; aoqi@0: _page_sizes[1] = SIZE_64K; aoqi@0: _page_sizes[2] = SIZE_4K; aoqi@0: _page_sizes[3] = 0; aoqi@0: } else if (Aix::can_use_64K_pages()) { aoqi@0: _large_page_size = SIZE_64K; aoqi@0: _page_sizes[0] = SIZE_64K; aoqi@0: _page_sizes[1] = SIZE_4K; aoqi@0: _page_sizes[2] = 0; aoqi@0: } aoqi@0: aoqi@0: if (Verbose) { aoqi@0: ("Default large page size is 0x%llX.", _large_page_size); aoqi@0: } aoqi@0: } // end: os::large_page_init() aoqi@0: aoqi@0: char* os::reserve_memory_special(size_t bytes, size_t alignment, char* req_addr, bool exec) { aoqi@0: // "exec" is passed in but not used. Creating the shared image for aoqi@0: // the code cache doesn't have an SHM_X executable permission to check. aoqi@0: Unimplemented(); aoqi@0: return 0; aoqi@0: } aoqi@0: aoqi@0: bool os::release_memory_special(char* base, size_t bytes) { aoqi@0: // detaching the SHM segment will also delete it, see reserve_memory_special() aoqi@0: Unimplemented(); aoqi@0: return false; aoqi@0: } aoqi@0: aoqi@0: size_t os::large_page_size() { aoqi@0: return _large_page_size; aoqi@0: } aoqi@0: aoqi@0: bool os::can_commit_large_page_memory() { aoqi@0: // Well, sadly we cannot commit anything at all (see comment in aoqi@0: // os::commit_memory) but we claim to so we can make use of large pages aoqi@0: return true; aoqi@0: } aoqi@0: aoqi@0: bool os::can_execute_large_page_memory() { aoqi@0: // We can do that aoqi@0: return true; aoqi@0: } aoqi@0: aoqi@0: // Reserve memory at an arbitrary address, only if that area is aoqi@0: // available (and not reserved for something else). aoqi@0: char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { aoqi@0: aoqi@0: bool use_mmap = false; aoqi@0: aoqi@0: // mmap: smaller graining, no large page support aoqi@0: // shm: large graining (256M), large page support, limited number of shm segments aoqi@0: // aoqi@0: // Prefer mmap wherever we either do not need large page support or have OS limits aoqi@0: aoqi@0: if (!UseLargePages || bytes < SIZE_16M) { aoqi@0: use_mmap = true; aoqi@0: } aoqi@0: aoqi@0: char* addr = NULL; aoqi@0: if (use_mmap) { aoqi@0: addr = reserve_mmaped_memory(bytes, requested_addr); aoqi@0: } else { aoqi@0: // shmat: wish address is mandatory, and do not try 16M pages here. aoqi@0: shmatted_memory_info_t info; aoqi@0: const int flags = RESSHM_WISHADDR_OR_FAIL; aoqi@0: if (reserve_shmatted_memory(bytes, requested_addr, flags, &info)) { aoqi@0: addr = info.addr; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: return addr; aoqi@0: } aoqi@0: aoqi@0: size_t os::read(int fd, void *buf, unsigned int nBytes) { aoqi@0: return ::read(fd, buf, nBytes); aoqi@0: } aoqi@0: aoqi@0: #define NANOSECS_PER_MILLISEC 1000000 aoqi@0: aoqi@0: int os::sleep(Thread* thread, jlong millis, bool interruptible) { aoqi@0: assert(thread == Thread::current(), "thread consistency check"); aoqi@0: aoqi@0: // Prevent nasty overflow in deadline calculation aoqi@0: // by handling long sleeps similar to solaris or windows. aoqi@0: const jlong limit = INT_MAX; aoqi@0: int result; aoqi@0: while (millis > limit) { aoqi@0: if ((result = os::sleep(thread, limit, interruptible)) != OS_OK) { aoqi@0: return result; aoqi@0: } aoqi@0: millis -= limit; aoqi@0: } aoqi@0: aoqi@0: ParkEvent * const slp = thread->_SleepEvent; aoqi@0: slp->reset(); aoqi@0: OrderAccess::fence(); aoqi@0: aoqi@0: if (interruptible) { aoqi@0: jlong prevtime = javaTimeNanos(); aoqi@0: aoqi@0: // Prevent precision loss and too long sleeps aoqi@0: jlong deadline = prevtime + millis * NANOSECS_PER_MILLISEC; aoqi@0: aoqi@0: for (;;) { aoqi@0: if (os::is_interrupted(thread, true)) { aoqi@0: return OS_INTRPT; aoqi@0: } aoqi@0: aoqi@0: jlong newtime = javaTimeNanos(); aoqi@0: aoqi@0: assert(newtime >= prevtime, "time moving backwards"); aoqi@0: // Doing prevtime and newtime in microseconds doesn't help precision, aoqi@0: // and trying to round up to avoid lost milliseconds can result in a aoqi@0: // too-short delay. aoqi@0: millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC; aoqi@0: aoqi@0: if (millis <= 0) { aoqi@0: return OS_OK; aoqi@0: } aoqi@0: aoqi@0: // Stop sleeping if we passed the deadline aoqi@0: if (newtime >= deadline) { aoqi@0: return OS_OK; aoqi@0: } aoqi@0: aoqi@0: prevtime = newtime; aoqi@0: aoqi@0: { aoqi@0: assert(thread->is_Java_thread(), "sanity check"); aoqi@0: JavaThread *jt = (JavaThread *) thread; aoqi@0: ThreadBlockInVM tbivm(jt); aoqi@0: OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); aoqi@0: aoqi@0: jt->set_suspend_equivalent(); aoqi@0: aoqi@0: slp->park(millis); aoqi@0: aoqi@0: // were we externally suspended while we were waiting? aoqi@0: jt->check_and_wait_while_suspended(); aoqi@0: } aoqi@0: } aoqi@0: } else { aoqi@0: OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); aoqi@0: jlong prevtime = javaTimeNanos(); aoqi@0: aoqi@0: // Prevent precision loss and too long sleeps aoqi@0: jlong deadline = prevtime + millis * NANOSECS_PER_MILLISEC; aoqi@0: aoqi@0: for (;;) { aoqi@0: // It'd be nice to avoid the back-to-back javaTimeNanos() calls on aoqi@0: // the 1st iteration ... aoqi@0: jlong newtime = javaTimeNanos(); aoqi@0: aoqi@0: if (newtime - prevtime < 0) { aoqi@0: // time moving backwards, should only happen if no monotonic clock aoqi@0: // not a guarantee() because JVM should not abort on kernel/glibc bugs aoqi@0: // - HS14 Commented out as not implemented. aoqi@0: // - TODO Maybe we should implement it? aoqi@0: //assert(!Aix::supports_monotonic_clock(), "time moving backwards"); aoqi@0: } else { aoqi@0: millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC; aoqi@0: } aoqi@0: aoqi@0: if (millis <= 0) break; aoqi@0: aoqi@0: if (newtime >= deadline) { aoqi@0: break; aoqi@0: } aoqi@0: aoqi@0: prevtime = newtime; aoqi@0: slp->park(millis); aoqi@0: } aoqi@0: return OS_OK; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: void os::naked_short_sleep(jlong ms) { aoqi@0: struct timespec req; aoqi@0: aoqi@0: assert(ms < 1000, "Un-interruptable sleep, short time use only"); aoqi@0: req.tv_sec = 0; aoqi@0: if (ms > 0) { aoqi@0: req.tv_nsec = (ms % 1000) * 1000000; aoqi@0: } aoqi@0: else { aoqi@0: req.tv_nsec = 1; aoqi@0: } aoqi@0: aoqi@0: nanosleep(&req, NULL); aoqi@0: aoqi@0: return; aoqi@0: } aoqi@0: aoqi@0: // Sleep forever; naked call to OS-specific sleep; use with CAUTION aoqi@0: void os::infinite_sleep() { aoqi@0: while (true) { // sleep forever ... aoqi@0: ::sleep(100); // ... 100 seconds at a time aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // Used to convert frequent JVM_Yield() to nops aoqi@0: bool os::dont_yield() { aoqi@0: return DontYieldALot; aoqi@0: } aoqi@0: aoqi@0: void os::yield() { aoqi@0: sched_yield(); aoqi@0: } aoqi@0: aoqi@0: os::YieldResult os::NakedYield() { sched_yield(); return os::YIELD_UNKNOWN; } aoqi@0: aoqi@0: void os::yield_all(int attempts) { aoqi@0: // Yields to all threads, including threads with lower priorities aoqi@0: // Threads on Linux are all with same priority. The Solaris style aoqi@0: // os::yield_all() with nanosleep(1ms) is not necessary. aoqi@0: sched_yield(); aoqi@0: } aoqi@0: aoqi@0: // Called from the tight loops to possibly influence time-sharing heuristics aoqi@0: void os::loop_breaker(int attempts) { aoqi@0: os::yield_all(attempts); aoqi@0: } aoqi@0: aoqi@0: //////////////////////////////////////////////////////////////////////////////// aoqi@0: // thread priority support aoqi@0: aoqi@0: // From AIX manpage to pthread_setschedparam aoqi@0: // (see: http://publib.boulder.ibm.com/infocenter/pseries/v5r3/index.jsp? aoqi@0: // topic=/com.ibm.aix.basetechref/doc/basetrf1/pthread_setschedparam.htm): aoqi@0: // aoqi@0: // "If schedpolicy is SCHED_OTHER, then sched_priority must be in the aoqi@0: // range from 40 to 80, where 40 is the least favored priority and 80 aoqi@0: // is the most favored." aoqi@0: // aoqi@0: // (Actually, I doubt this even has an impact on AIX, as we do kernel aoqi@0: // scheduling there; however, this still leaves iSeries.) aoqi@0: // aoqi@0: // We use the same values for AIX and PASE. aoqi@0: int os::java_to_os_priority[CriticalPriority + 1] = { aoqi@0: 54, // 0 Entry should never be used aoqi@0: aoqi@0: 55, // 1 MinPriority aoqi@0: 55, // 2 aoqi@0: 56, // 3 aoqi@0: aoqi@0: 56, // 4 aoqi@0: 57, // 5 NormPriority aoqi@0: 57, // 6 aoqi@0: aoqi@0: 58, // 7 aoqi@0: 58, // 8 aoqi@0: 59, // 9 NearMaxPriority aoqi@0: aoqi@0: 60, // 10 MaxPriority aoqi@0: aoqi@0: 60 // 11 CriticalPriority aoqi@0: }; aoqi@0: aoqi@0: OSReturn os::set_native_priority(Thread* thread, int newpri) { aoqi@0: if (!UseThreadPriorities) return OS_OK; aoqi@0: pthread_t thr = thread->osthread()->pthread_id(); aoqi@0: int policy = SCHED_OTHER; aoqi@0: struct sched_param param; aoqi@0: param.sched_priority = newpri; aoqi@0: int ret = pthread_setschedparam(thr, policy, ¶m); aoqi@0: aoqi@0: if (Verbose) { aoqi@0: if (ret == 0) { aoqi@0: fprintf(stderr, "changed priority of thread %d to %d\n", (int)thr, newpri); aoqi@0: } else { aoqi@0: fprintf(stderr, "Could not changed priority for thread %d to %d (error %d, %s)\n", aoqi@0: (int)thr, newpri, ret, strerror(ret)); aoqi@0: } aoqi@0: } aoqi@0: return (ret == 0) ? OS_OK : OS_ERR; aoqi@0: } aoqi@0: aoqi@0: OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { aoqi@0: if (!UseThreadPriorities) { aoqi@0: *priority_ptr = java_to_os_priority[NormPriority]; aoqi@0: return OS_OK; aoqi@0: } aoqi@0: pthread_t thr = thread->osthread()->pthread_id(); aoqi@0: int policy = SCHED_OTHER; aoqi@0: struct sched_param param; aoqi@0: int ret = pthread_getschedparam(thr, &policy, ¶m); aoqi@0: *priority_ptr = param.sched_priority; aoqi@0: aoqi@0: return (ret == 0) ? OS_OK : OS_ERR; aoqi@0: } aoqi@0: aoqi@0: // Hint to the underlying OS that a task switch would not be good. aoqi@0: // Void return because it's a hint and can fail. aoqi@0: void os::hint_no_preempt() {} aoqi@0: aoqi@0: //////////////////////////////////////////////////////////////////////////////// aoqi@0: // suspend/resume support aoqi@0: aoqi@0: // the low-level signal-based suspend/resume support is a remnant from the aoqi@0: // old VM-suspension that used to be for java-suspension, safepoints etc, aoqi@0: // within hotspot. Now there is a single use-case for this: aoqi@0: // - calling get_thread_pc() on the VMThread by the flat-profiler task aoqi@0: // that runs in the watcher thread. aoqi@0: // The remaining code is greatly simplified from the more general suspension aoqi@0: // code that used to be used. aoqi@0: // aoqi@0: // The protocol is quite simple: aoqi@0: // - suspend: aoqi@0: // - sends a signal to the target thread aoqi@0: // - polls the suspend state of the osthread using a yield loop aoqi@0: // - target thread signal handler (SR_handler) sets suspend state aoqi@0: // and blocks in sigsuspend until continued aoqi@0: // - resume: aoqi@0: // - sets target osthread state to continue aoqi@0: // - sends signal to end the sigsuspend loop in the SR_handler aoqi@0: // aoqi@0: // Note that the SR_lock plays no role in this suspend/resume protocol. aoqi@0: // aoqi@0: aoqi@0: static void resume_clear_context(OSThread *osthread) { aoqi@0: osthread->set_ucontext(NULL); aoqi@0: osthread->set_siginfo(NULL); aoqi@0: } aoqi@0: aoqi@0: static void suspend_save_context(OSThread *osthread, siginfo_t* siginfo, ucontext_t* context) { aoqi@0: osthread->set_ucontext(context); aoqi@0: osthread->set_siginfo(siginfo); aoqi@0: } aoqi@0: aoqi@0: // aoqi@0: // Handler function invoked when a thread's execution is suspended or aoqi@0: // resumed. We have to be careful that only async-safe functions are aoqi@0: // called here (Note: most pthread functions are not async safe and aoqi@0: // should be avoided.) aoqi@0: // aoqi@0: // Note: sigwait() is a more natural fit than sigsuspend() from an aoqi@0: // interface point of view, but sigwait() prevents the signal hander aoqi@0: // from being run. libpthread would get very confused by not having aoqi@0: // its signal handlers run and prevents sigwait()'s use with the aoqi@0: // mutex granting granting signal. aoqi@0: // aoqi@0: // Currently only ever called on the VMThread and JavaThreads (PC sampling). aoqi@0: // aoqi@0: static void SR_handler(int sig, siginfo_t* siginfo, ucontext_t* context) { aoqi@0: // Save and restore errno to avoid confusing native code with EINTR aoqi@0: // after sigsuspend. aoqi@0: int old_errno = errno; aoqi@0: aoqi@0: Thread* thread = Thread::current(); aoqi@0: OSThread* osthread = thread->osthread(); aoqi@0: assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread"); aoqi@0: aoqi@0: os::SuspendResume::State current = osthread->sr.state(); aoqi@0: if (current == os::SuspendResume::SR_SUSPEND_REQUEST) { aoqi@0: suspend_save_context(osthread, siginfo, context); aoqi@0: aoqi@0: // attempt to switch the state, we assume we had a SUSPEND_REQUEST aoqi@0: os::SuspendResume::State state = osthread->sr.suspended(); aoqi@0: if (state == os::SuspendResume::SR_SUSPENDED) { aoqi@0: sigset_t suspend_set; // signals for sigsuspend() aoqi@0: aoqi@0: // get current set of blocked signals and unblock resume signal aoqi@0: pthread_sigmask(SIG_BLOCK, NULL, &suspend_set); aoqi@0: sigdelset(&suspend_set, SR_signum); aoqi@0: aoqi@0: // wait here until we are resumed aoqi@0: while (1) { aoqi@0: sigsuspend(&suspend_set); aoqi@0: aoqi@0: os::SuspendResume::State result = osthread->sr.running(); aoqi@0: if (result == os::SuspendResume::SR_RUNNING) { aoqi@0: break; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: } else if (state == os::SuspendResume::SR_RUNNING) { aoqi@0: // request was cancelled, continue aoqi@0: } else { aoqi@0: ShouldNotReachHere(); aoqi@0: } aoqi@0: aoqi@0: resume_clear_context(osthread); aoqi@0: } else if (current == os::SuspendResume::SR_RUNNING) { aoqi@0: // request was cancelled, continue aoqi@0: } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) { aoqi@0: // ignore aoqi@0: } else { aoqi@0: ShouldNotReachHere(); aoqi@0: } aoqi@0: aoqi@0: errno = old_errno; aoqi@0: } aoqi@0: aoqi@0: aoqi@0: static int SR_initialize() { aoqi@0: struct sigaction act; aoqi@0: char *s; aoqi@0: // Get signal number to use for suspend/resume aoqi@0: if ((s = ::getenv("_JAVA_SR_SIGNUM")) != 0) { aoqi@0: int sig = ::strtol(s, 0, 10); aoqi@0: if (sig > 0 || sig < NSIG) { aoqi@0: SR_signum = sig; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: assert(SR_signum > SIGSEGV && SR_signum > SIGBUS, aoqi@0: "SR_signum must be greater than max(SIGSEGV, SIGBUS), see 4355769"); aoqi@0: aoqi@0: sigemptyset(&SR_sigset); aoqi@0: sigaddset(&SR_sigset, SR_signum); aoqi@0: aoqi@0: // Set up signal handler for suspend/resume. aoqi@0: act.sa_flags = SA_RESTART|SA_SIGINFO; aoqi@0: act.sa_handler = (void (*)(int)) SR_handler; aoqi@0: aoqi@0: // SR_signum is blocked by default. aoqi@0: // 4528190 - We also need to block pthread restart signal (32 on all aoqi@0: // supported Linux platforms). Note that LinuxThreads need to block aoqi@0: // this signal for all threads to work properly. So we don't have aoqi@0: // to use hard-coded signal number when setting up the mask. aoqi@0: pthread_sigmask(SIG_BLOCK, NULL, &act.sa_mask); aoqi@0: aoqi@0: if (sigaction(SR_signum, &act, 0) == -1) { aoqi@0: return -1; aoqi@0: } aoqi@0: aoqi@0: // Save signal flag aoqi@0: os::Aix::set_our_sigflags(SR_signum, act.sa_flags); aoqi@0: return 0; aoqi@0: } aoqi@0: aoqi@0: static int SR_finalize() { aoqi@0: return 0; aoqi@0: } aoqi@0: aoqi@0: static int sr_notify(OSThread* osthread) { aoqi@0: int status = pthread_kill(osthread->pthread_id(), SR_signum); aoqi@0: assert_status(status == 0, status, "pthread_kill"); aoqi@0: return status; aoqi@0: } aoqi@0: aoqi@0: // "Randomly" selected value for how long we want to spin aoqi@0: // before bailing out on suspending a thread, also how often aoqi@0: // we send a signal to a thread we want to resume aoqi@0: static const int RANDOMLY_LARGE_INTEGER = 1000000; aoqi@0: static const int RANDOMLY_LARGE_INTEGER2 = 100; aoqi@0: aoqi@0: // returns true on success and false on error - really an error is fatal aoqi@0: // but this seems the normal response to library errors aoqi@0: static bool do_suspend(OSThread* osthread) { aoqi@0: assert(osthread->sr.is_running(), "thread should be running"); aoqi@0: // mark as suspended and send signal aoqi@0: aoqi@0: if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) { aoqi@0: // failed to switch, state wasn't running? aoqi@0: ShouldNotReachHere(); aoqi@0: return false; aoqi@0: } aoqi@0: aoqi@0: if (sr_notify(osthread) != 0) { aoqi@0: // try to cancel, switch to running aoqi@0: aoqi@0: os::SuspendResume::State result = osthread->sr.cancel_suspend(); aoqi@0: if (result == os::SuspendResume::SR_RUNNING) { aoqi@0: // cancelled aoqi@0: return false; aoqi@0: } else if (result == os::SuspendResume::SR_SUSPENDED) { aoqi@0: // somehow managed to suspend aoqi@0: return true; aoqi@0: } else { aoqi@0: ShouldNotReachHere(); aoqi@0: return false; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED aoqi@0: aoqi@0: for (int n = 0; !osthread->sr.is_suspended(); n++) { aoqi@0: for (int i = 0; i < RANDOMLY_LARGE_INTEGER2 && !osthread->sr.is_suspended(); i++) { aoqi@0: os::yield_all(i); aoqi@0: } aoqi@0: aoqi@0: // timeout, try to cancel the request aoqi@0: if (n >= RANDOMLY_LARGE_INTEGER) { aoqi@0: os::SuspendResume::State cancelled = osthread->sr.cancel_suspend(); aoqi@0: if (cancelled == os::SuspendResume::SR_RUNNING) { aoqi@0: return false; aoqi@0: } else if (cancelled == os::SuspendResume::SR_SUSPENDED) { aoqi@0: return true; aoqi@0: } else { aoqi@0: ShouldNotReachHere(); aoqi@0: return false; aoqi@0: } aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: guarantee(osthread->sr.is_suspended(), "Must be suspended"); aoqi@0: return true; aoqi@0: } aoqi@0: aoqi@0: static void do_resume(OSThread* osthread) { aoqi@0: //assert(osthread->sr.is_suspended(), "thread should be suspended"); aoqi@0: aoqi@0: if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) { aoqi@0: // failed to switch to WAKEUP_REQUEST aoqi@0: ShouldNotReachHere(); aoqi@0: return; aoqi@0: } aoqi@0: aoqi@0: while (!osthread->sr.is_running()) { aoqi@0: if (sr_notify(osthread) == 0) { aoqi@0: for (int n = 0; n < RANDOMLY_LARGE_INTEGER && !osthread->sr.is_running(); n++) { aoqi@0: for (int i = 0; i < 100 && !osthread->sr.is_running(); i++) { aoqi@0: os::yield_all(i); aoqi@0: } aoqi@0: } aoqi@0: } else { aoqi@0: ShouldNotReachHere(); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: guarantee(osthread->sr.is_running(), "Must be running!"); aoqi@0: } aoqi@0: aoqi@0: //////////////////////////////////////////////////////////////////////////////// aoqi@0: // interrupt support aoqi@0: aoqi@0: void os::interrupt(Thread* thread) { aoqi@0: assert(Thread::current() == thread || Threads_lock->owned_by_self(), aoqi@0: "possibility of dangling Thread pointer"); aoqi@0: aoqi@0: OSThread* osthread = thread->osthread(); aoqi@0: aoqi@0: if (!osthread->interrupted()) { aoqi@0: osthread->set_interrupted(true); aoqi@0: // More than one thread can get here with the same value of osthread, aoqi@0: // resulting in multiple notifications. We do, however, want the store aoqi@0: // to interrupted() to be visible to other threads before we execute unpark(). aoqi@0: OrderAccess::fence(); aoqi@0: ParkEvent * const slp = thread->_SleepEvent; aoqi@0: if (slp != NULL) slp->unpark(); aoqi@0: } aoqi@0: aoqi@0: // For JSR166. Unpark even if interrupt status already was set aoqi@0: if (thread->is_Java_thread()) aoqi@0: ((JavaThread*)thread)->parker()->unpark(); aoqi@0: aoqi@0: ParkEvent * ev = thread->_ParkEvent; aoqi@0: if (ev != NULL) ev->unpark(); aoqi@0: aoqi@0: } aoqi@0: aoqi@0: bool os::is_interrupted(Thread* thread, bool clear_interrupted) { aoqi@0: assert(Thread::current() == thread || Threads_lock->owned_by_self(), aoqi@0: "possibility of dangling Thread pointer"); aoqi@0: aoqi@0: OSThread* osthread = thread->osthread(); aoqi@0: aoqi@0: bool interrupted = osthread->interrupted(); aoqi@0: aoqi@0: if (interrupted && clear_interrupted) { aoqi@0: osthread->set_interrupted(false); aoqi@0: // consider thread->_SleepEvent->reset() ... optional optimization aoqi@0: } aoqi@0: aoqi@0: return interrupted; aoqi@0: } aoqi@0: aoqi@0: /////////////////////////////////////////////////////////////////////////////////// aoqi@0: // signal handling (except suspend/resume) aoqi@0: aoqi@0: // This routine may be used by user applications as a "hook" to catch signals. aoqi@0: // The user-defined signal handler must pass unrecognized signals to this aoqi@0: // routine, and if it returns true (non-zero), then the signal handler must aoqi@0: // return immediately. If the flag "abort_if_unrecognized" is true, then this aoqi@0: // routine will never retun false (zero), but instead will execute a VM panic aoqi@0: // routine kill the process. aoqi@0: // aoqi@0: // If this routine returns false, it is OK to call it again. This allows aoqi@0: // the user-defined signal handler to perform checks either before or after aoqi@0: // the VM performs its own checks. Naturally, the user code would be making aoqi@0: // a serious error if it tried to handle an exception (such as a null check aoqi@0: // or breakpoint) that the VM was generating for its own correct operation. aoqi@0: // aoqi@0: // This routine may recognize any of the following kinds of signals: aoqi@0: // SIGBUS, SIGSEGV, SIGILL, SIGFPE, SIGQUIT, SIGPIPE, SIGXFSZ, SIGUSR1. aoqi@0: // It should be consulted by handlers for any of those signals. aoqi@0: // aoqi@0: // The caller of this routine must pass in the three arguments supplied aoqi@0: // to the function referred to in the "sa_sigaction" (not the "sa_handler") aoqi@0: // field of the structure passed to sigaction(). This routine assumes that aoqi@0: // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. aoqi@0: // aoqi@0: // Note that the VM will print warnings if it detects conflicting signal aoqi@0: // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". aoqi@0: // aoqi@0: extern "C" JNIEXPORT int aoqi@0: JVM_handle_aix_signal(int signo, siginfo_t* siginfo, void* ucontext, int abort_if_unrecognized); aoqi@0: aoqi@0: // Set thread signal mask (for some reason on AIX sigthreadmask() seems aoqi@0: // to be the thing to call; documentation is not terribly clear about whether aoqi@0: // pthread_sigmask also works, and if it does, whether it does the same. aoqi@0: bool set_thread_signal_mask(int how, const sigset_t* set, sigset_t* oset) { aoqi@0: const int rc = ::pthread_sigmask(how, set, oset); aoqi@0: // return value semantics differ slightly for error case: aoqi@0: // pthread_sigmask returns error number, sigthreadmask -1 and sets global errno aoqi@0: // (so, pthread_sigmask is more theadsafe for error handling) aoqi@0: // But success is always 0. aoqi@0: return rc == 0 ? true : false; aoqi@0: } aoqi@0: aoqi@0: // Function to unblock all signals which are, according aoqi@0: // to POSIX, typical program error signals. If they happen while being blocked, aoqi@0: // they typically will bring down the process immediately. aoqi@0: bool unblock_program_error_signals() { aoqi@0: sigset_t set; aoqi@0: ::sigemptyset(&set); aoqi@0: ::sigaddset(&set, SIGILL); aoqi@0: ::sigaddset(&set, SIGBUS); aoqi@0: ::sigaddset(&set, SIGFPE); aoqi@0: ::sigaddset(&set, SIGSEGV); aoqi@0: return set_thread_signal_mask(SIG_UNBLOCK, &set, NULL); aoqi@0: } aoqi@0: aoqi@0: // Renamed from 'signalHandler' to avoid collision with other shared libs. aoqi@0: void javaSignalHandler(int sig, siginfo_t* info, void* uc) { aoqi@0: assert(info != NULL && uc != NULL, "it must be old kernel"); aoqi@0: aoqi@0: // Never leave program error signals blocked; aoqi@0: // on all our platforms they would bring down the process immediately when aoqi@0: // getting raised while being blocked. aoqi@0: unblock_program_error_signals(); aoqi@0: aoqi@0: JVM_handle_aix_signal(sig, info, uc, true); aoqi@0: } aoqi@0: aoqi@0: aoqi@0: // This boolean allows users to forward their own non-matching signals aoqi@0: // to JVM_handle_aix_signal, harmlessly. aoqi@0: bool os::Aix::signal_handlers_are_installed = false; aoqi@0: aoqi@0: // For signal-chaining aoqi@0: struct sigaction os::Aix::sigact[MAXSIGNUM]; aoqi@0: unsigned int os::Aix::sigs = 0; aoqi@0: bool os::Aix::libjsig_is_loaded = false; aoqi@0: typedef struct sigaction *(*get_signal_t)(int); aoqi@0: get_signal_t os::Aix::get_signal_action = NULL; aoqi@0: aoqi@0: struct sigaction* os::Aix::get_chained_signal_action(int sig) { aoqi@0: struct sigaction *actp = NULL; aoqi@0: aoqi@0: if (libjsig_is_loaded) { aoqi@0: // Retrieve the old signal handler from libjsig aoqi@0: actp = (*get_signal_action)(sig); aoqi@0: } aoqi@0: if (actp == NULL) { aoqi@0: // Retrieve the preinstalled signal handler from jvm aoqi@0: actp = get_preinstalled_handler(sig); aoqi@0: } aoqi@0: aoqi@0: return actp; aoqi@0: } aoqi@0: aoqi@0: static bool call_chained_handler(struct sigaction *actp, int sig, aoqi@0: siginfo_t *siginfo, void *context) { aoqi@0: // Call the old signal handler aoqi@0: if (actp->sa_handler == SIG_DFL) { aoqi@0: // It's more reasonable to let jvm treat it as an unexpected exception aoqi@0: // instead of taking the default action. aoqi@0: return false; aoqi@0: } else if (actp->sa_handler != SIG_IGN) { aoqi@0: if ((actp->sa_flags & SA_NODEFER) == 0) { aoqi@0: // automaticlly block the signal aoqi@0: sigaddset(&(actp->sa_mask), sig); aoqi@0: } aoqi@0: aoqi@0: sa_handler_t hand = NULL; aoqi@0: sa_sigaction_t sa = NULL; aoqi@0: bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; aoqi@0: // retrieve the chained handler aoqi@0: if (siginfo_flag_set) { aoqi@0: sa = actp->sa_sigaction; aoqi@0: } else { aoqi@0: hand = actp->sa_handler; aoqi@0: } aoqi@0: aoqi@0: if ((actp->sa_flags & SA_RESETHAND) != 0) { aoqi@0: actp->sa_handler = SIG_DFL; aoqi@0: } aoqi@0: aoqi@0: // try to honor the signal mask aoqi@0: sigset_t oset; aoqi@0: pthread_sigmask(SIG_SETMASK, &(actp->sa_mask), &oset); aoqi@0: aoqi@0: // call into the chained handler aoqi@0: if (siginfo_flag_set) { aoqi@0: (*sa)(sig, siginfo, context); aoqi@0: } else { aoqi@0: (*hand)(sig); aoqi@0: } aoqi@0: aoqi@0: // restore the signal mask aoqi@0: pthread_sigmask(SIG_SETMASK, &oset, 0); aoqi@0: } aoqi@0: // Tell jvm's signal handler the signal is taken care of. aoqi@0: return true; aoqi@0: } aoqi@0: aoqi@0: bool os::Aix::chained_handler(int sig, siginfo_t* siginfo, void* context) { aoqi@0: bool chained = false; aoqi@0: // signal-chaining aoqi@0: if (UseSignalChaining) { aoqi@0: struct sigaction *actp = get_chained_signal_action(sig); aoqi@0: if (actp != NULL) { aoqi@0: chained = call_chained_handler(actp, sig, siginfo, context); aoqi@0: } aoqi@0: } aoqi@0: return chained; aoqi@0: } aoqi@0: aoqi@0: struct sigaction* os::Aix::get_preinstalled_handler(int sig) { aoqi@0: if ((((unsigned int)1 << sig) & sigs) != 0) { aoqi@0: return &sigact[sig]; aoqi@0: } aoqi@0: return NULL; aoqi@0: } aoqi@0: aoqi@0: void os::Aix::save_preinstalled_handler(int sig, struct sigaction& oldAct) { aoqi@0: assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); aoqi@0: sigact[sig] = oldAct; aoqi@0: sigs |= (unsigned int)1 << sig; aoqi@0: } aoqi@0: aoqi@0: // for diagnostic aoqi@0: int os::Aix::sigflags[MAXSIGNUM]; aoqi@0: aoqi@0: int os::Aix::get_our_sigflags(int sig) { aoqi@0: assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); aoqi@0: return sigflags[sig]; aoqi@0: } aoqi@0: aoqi@0: void os::Aix::set_our_sigflags(int sig, int flags) { aoqi@0: assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); aoqi@0: sigflags[sig] = flags; aoqi@0: } aoqi@0: aoqi@0: void os::Aix::set_signal_handler(int sig, bool set_installed) { aoqi@0: // Check for overwrite. aoqi@0: struct sigaction oldAct; aoqi@0: sigaction(sig, (struct sigaction*)NULL, &oldAct); aoqi@0: aoqi@0: void* oldhand = oldAct.sa_sigaction aoqi@0: ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) aoqi@0: : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); aoqi@0: // Renamed 'signalHandler' to avoid collision with other shared libs. aoqi@0: if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && aoqi@0: oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && aoqi@0: oldhand != CAST_FROM_FN_PTR(void*, (sa_sigaction_t)javaSignalHandler)) { aoqi@0: if (AllowUserSignalHandlers || !set_installed) { aoqi@0: // Do not overwrite; user takes responsibility to forward to us. aoqi@0: return; aoqi@0: } else if (UseSignalChaining) { aoqi@0: // save the old handler in jvm aoqi@0: save_preinstalled_handler(sig, oldAct); aoqi@0: // libjsig also interposes the sigaction() call below and saves the aoqi@0: // old sigaction on it own. aoqi@0: } else { aoqi@0: fatal(err_msg("Encountered unexpected pre-existing sigaction handler " aoqi@0: "%#lx for signal %d.", (long)oldhand, sig)); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: struct sigaction sigAct; aoqi@0: sigfillset(&(sigAct.sa_mask)); aoqi@0: if (!set_installed) { aoqi@0: sigAct.sa_handler = SIG_DFL; aoqi@0: sigAct.sa_flags = SA_RESTART; aoqi@0: } else { aoqi@0: // Renamed 'signalHandler' to avoid collision with other shared libs. aoqi@0: sigAct.sa_sigaction = javaSignalHandler; aoqi@0: sigAct.sa_flags = SA_SIGINFO|SA_RESTART; aoqi@0: } aoqi@0: // Save flags, which are set by ours aoqi@0: assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); aoqi@0: sigflags[sig] = sigAct.sa_flags; aoqi@0: aoqi@0: int ret = sigaction(sig, &sigAct, &oldAct); aoqi@0: assert(ret == 0, "check"); aoqi@0: aoqi@0: void* oldhand2 = oldAct.sa_sigaction aoqi@0: ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) aoqi@0: : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); aoqi@0: assert(oldhand2 == oldhand, "no concurrent signal handler installation"); aoqi@0: } aoqi@0: aoqi@0: // install signal handlers for signals that HotSpot needs to aoqi@0: // handle in order to support Java-level exception handling. aoqi@0: void os::Aix::install_signal_handlers() { aoqi@0: if (!signal_handlers_are_installed) { aoqi@0: signal_handlers_are_installed = true; aoqi@0: aoqi@0: // signal-chaining aoqi@0: typedef void (*signal_setting_t)(); aoqi@0: signal_setting_t begin_signal_setting = NULL; aoqi@0: signal_setting_t end_signal_setting = NULL; aoqi@0: begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, aoqi@0: dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); aoqi@0: if (begin_signal_setting != NULL) { aoqi@0: end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, aoqi@0: dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); aoqi@0: get_signal_action = CAST_TO_FN_PTR(get_signal_t, aoqi@0: dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); aoqi@0: libjsig_is_loaded = true; aoqi@0: assert(UseSignalChaining, "should enable signal-chaining"); aoqi@0: } aoqi@0: if (libjsig_is_loaded) { aoqi@0: // Tell libjsig jvm is setting signal handlers aoqi@0: (*begin_signal_setting)(); aoqi@0: } aoqi@0: aoqi@0: set_signal_handler(SIGSEGV, true); aoqi@0: set_signal_handler(SIGPIPE, true); aoqi@0: set_signal_handler(SIGBUS, true); aoqi@0: set_signal_handler(SIGILL, true); aoqi@0: set_signal_handler(SIGFPE, true); aoqi@0: set_signal_handler(SIGTRAP, true); aoqi@0: set_signal_handler(SIGXFSZ, true); aoqi@0: set_signal_handler(SIGDANGER, true); aoqi@0: aoqi@0: if (libjsig_is_loaded) { aoqi@0: // Tell libjsig jvm finishes setting signal handlers aoqi@0: (*end_signal_setting)(); aoqi@0: } aoqi@0: aoqi@0: // We don't activate signal checker if libjsig is in place, we trust ourselves aoqi@0: // and if UserSignalHandler is installed all bets are off. aoqi@0: // Log that signal checking is off only if -verbose:jni is specified. aoqi@0: if (CheckJNICalls) { aoqi@0: if (libjsig_is_loaded) { aoqi@0: tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); aoqi@0: check_signals = false; aoqi@0: } aoqi@0: if (AllowUserSignalHandlers) { aoqi@0: tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); aoqi@0: check_signals = false; aoqi@0: } aoqi@0: // need to initialize check_signal_done aoqi@0: ::sigemptyset(&check_signal_done); aoqi@0: } aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: static const char* get_signal_handler_name(address handler, aoqi@0: char* buf, int buflen) { aoqi@0: int offset; aoqi@0: bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); aoqi@0: if (found) { aoqi@0: // skip directory names aoqi@0: const char *p1, *p2; aoqi@0: p1 = buf; aoqi@0: size_t len = strlen(os::file_separator()); aoqi@0: while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; aoqi@0: // The way os::dll_address_to_library_name is implemented on Aix aoqi@0: // right now, it always returns -1 for the offset which is not aoqi@0: // terribly informative. aoqi@0: // Will fix that. For now, omit the offset. aoqi@0: jio_snprintf(buf, buflen, "%s", p1); aoqi@0: } else { aoqi@0: jio_snprintf(buf, buflen, PTR_FORMAT, handler); aoqi@0: } aoqi@0: return buf; aoqi@0: } aoqi@0: aoqi@0: static void print_signal_handler(outputStream* st, int sig, aoqi@0: char* buf, size_t buflen) { aoqi@0: struct sigaction sa; aoqi@0: sigaction(sig, NULL, &sa); aoqi@0: aoqi@0: st->print("%s: ", os::exception_name(sig, buf, buflen)); aoqi@0: aoqi@0: address handler = (sa.sa_flags & SA_SIGINFO) aoqi@0: ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) aoqi@0: : CAST_FROM_FN_PTR(address, sa.sa_handler); aoqi@0: aoqi@0: if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { aoqi@0: st->print("SIG_DFL"); aoqi@0: } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { aoqi@0: st->print("SIG_IGN"); aoqi@0: } else { aoqi@0: st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); aoqi@0: } aoqi@0: aoqi@0: // Print readable mask. aoqi@0: st->print(", sa_mask[0]="); aoqi@0: os::Posix::print_signal_set_short(st, &sa.sa_mask); aoqi@0: aoqi@0: address rh = VMError::get_resetted_sighandler(sig); aoqi@0: // May be, handler was resetted by VMError? aoqi@0: if (rh != NULL) { aoqi@0: handler = rh; aoqi@0: sa.sa_flags = VMError::get_resetted_sigflags(sig); aoqi@0: } aoqi@0: aoqi@0: // Print textual representation of sa_flags. aoqi@0: st->print(", sa_flags="); aoqi@0: os::Posix::print_sa_flags(st, sa.sa_flags); aoqi@0: aoqi@0: // Check: is it our handler? aoqi@0: if (handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)javaSignalHandler) || aoqi@0: handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler)) { aoqi@0: // It is our signal handler. aoqi@0: // Check for flags, reset system-used one! aoqi@0: if ((int)sa.sa_flags != os::Aix::get_our_sigflags(sig)) { aoqi@0: st->print(", flags was changed from " PTR32_FORMAT ", consider using jsig library", aoqi@0: os::Aix::get_our_sigflags(sig)); aoqi@0: } aoqi@0: } aoqi@0: st->cr(); aoqi@0: } aoqi@0: aoqi@0: aoqi@0: #define DO_SIGNAL_CHECK(sig) \ aoqi@0: if (!sigismember(&check_signal_done, sig)) \ aoqi@0: os::Aix::check_signal_handler(sig) aoqi@0: aoqi@0: // This method is a periodic task to check for misbehaving JNI applications aoqi@0: // under CheckJNI, we can add any periodic checks here aoqi@0: aoqi@0: void os::run_periodic_checks() { aoqi@0: aoqi@0: if (check_signals == false) return; aoqi@0: aoqi@0: // SEGV and BUS if overridden could potentially prevent aoqi@0: // generation of hs*.log in the event of a crash, debugging aoqi@0: // such a case can be very challenging, so we absolutely aoqi@0: // check the following for a good measure: aoqi@0: DO_SIGNAL_CHECK(SIGSEGV); aoqi@0: DO_SIGNAL_CHECK(SIGILL); aoqi@0: DO_SIGNAL_CHECK(SIGFPE); aoqi@0: DO_SIGNAL_CHECK(SIGBUS); aoqi@0: DO_SIGNAL_CHECK(SIGPIPE); aoqi@0: DO_SIGNAL_CHECK(SIGXFSZ); aoqi@0: if (UseSIGTRAP) { aoqi@0: DO_SIGNAL_CHECK(SIGTRAP); aoqi@0: } aoqi@0: DO_SIGNAL_CHECK(SIGDANGER); aoqi@0: aoqi@0: // ReduceSignalUsage allows the user to override these handlers aoqi@0: // see comments at the very top and jvm_solaris.h aoqi@0: if (!ReduceSignalUsage) { aoqi@0: DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); aoqi@0: DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); aoqi@0: DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); aoqi@0: DO_SIGNAL_CHECK(BREAK_SIGNAL); aoqi@0: } aoqi@0: aoqi@0: DO_SIGNAL_CHECK(SR_signum); aoqi@0: DO_SIGNAL_CHECK(INTERRUPT_SIGNAL); aoqi@0: } aoqi@0: aoqi@0: typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); aoqi@0: aoqi@0: static os_sigaction_t os_sigaction = NULL; aoqi@0: aoqi@0: void os::Aix::check_signal_handler(int sig) { aoqi@0: char buf[O_BUFLEN]; aoqi@0: address jvmHandler = NULL; aoqi@0: aoqi@0: struct sigaction act; aoqi@0: if (os_sigaction == NULL) { aoqi@0: // only trust the default sigaction, in case it has been interposed aoqi@0: os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); aoqi@0: if (os_sigaction == NULL) return; aoqi@0: } aoqi@0: aoqi@0: os_sigaction(sig, (struct sigaction*)NULL, &act); aoqi@0: aoqi@0: address thisHandler = (act.sa_flags & SA_SIGINFO) aoqi@0: ? CAST_FROM_FN_PTR(address, act.sa_sigaction) aoqi@0: : CAST_FROM_FN_PTR(address, act.sa_handler); aoqi@0: aoqi@0: aoqi@0: switch(sig) { aoqi@0: case SIGSEGV: aoqi@0: case SIGBUS: aoqi@0: case SIGFPE: aoqi@0: case SIGPIPE: aoqi@0: case SIGILL: aoqi@0: case SIGXFSZ: aoqi@0: // Renamed 'signalHandler' to avoid collision with other shared libs. aoqi@0: jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)javaSignalHandler); aoqi@0: break; aoqi@0: aoqi@0: case SHUTDOWN1_SIGNAL: aoqi@0: case SHUTDOWN2_SIGNAL: aoqi@0: case SHUTDOWN3_SIGNAL: aoqi@0: case BREAK_SIGNAL: aoqi@0: jvmHandler = (address)user_handler(); aoqi@0: break; aoqi@0: aoqi@0: case INTERRUPT_SIGNAL: aoqi@0: jvmHandler = CAST_FROM_FN_PTR(address, SIG_DFL); aoqi@0: break; aoqi@0: aoqi@0: default: aoqi@0: if (sig == SR_signum) { aoqi@0: jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler); aoqi@0: } else { aoqi@0: return; aoqi@0: } aoqi@0: break; aoqi@0: } aoqi@0: aoqi@0: if (thisHandler != jvmHandler) { aoqi@0: tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); aoqi@0: tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); aoqi@0: tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); aoqi@0: // No need to check this sig any longer aoqi@0: sigaddset(&check_signal_done, sig); aoqi@0: } else if (os::Aix::get_our_sigflags(sig) != 0 && (int)act.sa_flags != os::Aix::get_our_sigflags(sig)) { aoqi@0: tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); aoqi@0: tty->print("expected:" PTR32_FORMAT, os::Aix::get_our_sigflags(sig)); aoqi@0: tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); aoqi@0: // No need to check this sig any longer aoqi@0: sigaddset(&check_signal_done, sig); aoqi@0: } aoqi@0: aoqi@0: // Dump all the signal aoqi@0: if (sigismember(&check_signal_done, sig)) { aoqi@0: print_signal_handlers(tty, buf, O_BUFLEN); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: extern bool signal_name(int signo, char* buf, size_t len); aoqi@0: aoqi@0: const char* os::exception_name(int exception_code, char* buf, size_t size) { aoqi@0: if (0 < exception_code && exception_code <= SIGRTMAX) { aoqi@0: // signal aoqi@0: if (!signal_name(exception_code, buf, size)) { aoqi@0: jio_snprintf(buf, size, "SIG%d", exception_code); aoqi@0: } aoqi@0: return buf; aoqi@0: } else { aoqi@0: return NULL; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // To install functions for atexit system call aoqi@0: extern "C" { aoqi@0: static void perfMemory_exit_helper() { aoqi@0: perfMemory_exit(); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // This is called _before_ the most of global arguments have been parsed. aoqi@0: void os::init(void) { aoqi@0: // This is basic, we want to know if that ever changes. aoqi@0: // (shared memory boundary is supposed to be a 256M aligned) aoqi@0: assert(SHMLBA == ((uint64_t)0x10000000ULL)/*256M*/, "unexpected"); aoqi@0: aoqi@0: // First off, we need to know whether we run on AIX or PASE, and aoqi@0: // the OS level we run on. aoqi@0: os::Aix::initialize_os_info(); aoqi@0: aoqi@0: // Scan environment (SPEC1170 behaviour, etc) aoqi@0: os::Aix::scan_environment(); aoqi@0: aoqi@0: // Check which pages are supported by AIX. aoqi@0: os::Aix::query_multipage_support(); aoqi@0: aoqi@0: // Next, we need to initialize libo4 and libperfstat libraries. aoqi@0: if (os::Aix::on_pase()) { aoqi@0: os::Aix::initialize_libo4(); aoqi@0: } else { aoqi@0: os::Aix::initialize_libperfstat(); aoqi@0: } aoqi@0: aoqi@0: // Reset the perfstat information provided by ODM. aoqi@0: if (os::Aix::on_aix()) { aoqi@0: libperfstat::perfstat_reset(); aoqi@0: } aoqi@0: aoqi@0: // Now initialze basic system properties. Note that for some of the values we aoqi@0: // need libperfstat etc. aoqi@0: os::Aix::initialize_system_info(); aoqi@0: aoqi@0: // Initialize large page support. aoqi@0: if (UseLargePages) { aoqi@0: os::large_page_init(); aoqi@0: if (!UseLargePages) { aoqi@0: // initialize os::_page_sizes aoqi@0: _page_sizes[0] = Aix::page_size(); aoqi@0: _page_sizes[1] = 0; aoqi@0: if (Verbose) { aoqi@0: fprintf(stderr, "Large Page initialization failed: setting UseLargePages=0.\n"); aoqi@0: } aoqi@0: } aoqi@0: } else { aoqi@0: // initialize os::_page_sizes aoqi@0: _page_sizes[0] = Aix::page_size(); aoqi@0: _page_sizes[1] = 0; aoqi@0: } aoqi@0: aoqi@0: // debug trace aoqi@0: if (Verbose) { aoqi@0: fprintf(stderr, "os::vm_page_size 0x%llX\n", os::vm_page_size()); aoqi@0: fprintf(stderr, "os::large_page_size 0x%llX\n", os::large_page_size()); aoqi@0: fprintf(stderr, "os::_page_sizes = ( "); aoqi@0: for (int i = 0; _page_sizes[i]; i ++) { aoqi@0: fprintf(stderr, " %s ", describe_pagesize(_page_sizes[i])); aoqi@0: } aoqi@0: fprintf(stderr, ")\n"); aoqi@0: } aoqi@0: aoqi@0: _initial_pid = getpid(); aoqi@0: aoqi@0: clock_tics_per_sec = sysconf(_SC_CLK_TCK); aoqi@0: aoqi@0: init_random(1234567); aoqi@0: aoqi@0: ThreadCritical::initialize(); aoqi@0: aoqi@0: // Main_thread points to the aboriginal thread. aoqi@0: Aix::_main_thread = pthread_self(); aoqi@0: aoqi@0: initial_time_count = os::elapsed_counter(); aoqi@0: pthread_mutex_init(&dl_mutex, NULL); aoqi@0: } aoqi@0: aoqi@0: // this is called _after_ the global arguments have been parsed aoqi@0: jint os::init_2(void) { aoqi@0: aoqi@0: if (Verbose) { aoqi@0: fprintf(stderr, "processor count: %d\n", os::_processor_count); aoqi@0: fprintf(stderr, "physical memory: %lu\n", Aix::_physical_memory); aoqi@0: } aoqi@0: aoqi@0: // initially build up the loaded dll map aoqi@0: LoadedLibraries::reload(); aoqi@0: aoqi@0: const int page_size = Aix::page_size(); aoqi@0: const int map_size = page_size; aoqi@0: aoqi@0: address map_address = (address) MAP_FAILED; aoqi@0: const int prot = PROT_READ; aoqi@0: const int flags = MAP_PRIVATE|MAP_ANONYMOUS; aoqi@0: aoqi@0: // use optimized addresses for the polling page, aoqi@0: // e.g. map it to a special 32-bit address. aoqi@0: if (OptimizePollingPageLocation) { aoqi@0: // architecture-specific list of address wishes: aoqi@0: address address_wishes[] = { aoqi@0: // AIX: addresses lower than 0x30000000 don't seem to work on AIX. aoqi@0: // PPC64: all address wishes are non-negative 32 bit values where aoqi@0: // the lower 16 bits are all zero. we can load these addresses aoqi@0: // with a single ppc_lis instruction. aoqi@0: (address) 0x30000000, (address) 0x31000000, aoqi@0: (address) 0x32000000, (address) 0x33000000, aoqi@0: (address) 0x40000000, (address) 0x41000000, aoqi@0: (address) 0x42000000, (address) 0x43000000, aoqi@0: (address) 0x50000000, (address) 0x51000000, aoqi@0: (address) 0x52000000, (address) 0x53000000, aoqi@0: (address) 0x60000000, (address) 0x61000000, aoqi@0: (address) 0x62000000, (address) 0x63000000 aoqi@0: }; aoqi@0: int address_wishes_length = sizeof(address_wishes)/sizeof(address); aoqi@0: aoqi@0: // iterate over the list of address wishes: aoqi@0: for (int i=0; i %p\n", aoqi@0: address_wishes[i], map_address + (ssize_t)page_size); aoqi@0: } aoqi@0: aoqi@0: if (map_address + (ssize_t)page_size == address_wishes[i]) { aoqi@0: // map succeeded and map_address is at wished address, exit loop. aoqi@0: break; aoqi@0: } aoqi@0: aoqi@0: if (map_address != (address) MAP_FAILED) { aoqi@0: // map succeeded, but polling_page is not at wished address, unmap and continue. aoqi@0: ::munmap(map_address, map_size); aoqi@0: map_address = (address) MAP_FAILED; aoqi@0: } aoqi@0: // map failed, continue loop. aoqi@0: } aoqi@0: } // end OptimizePollingPageLocation aoqi@0: aoqi@0: if (map_address == (address) MAP_FAILED) { aoqi@0: map_address = (address) ::mmap(NULL, map_size, prot, flags, -1, 0); aoqi@0: } aoqi@0: guarantee(map_address != MAP_FAILED, "os::init_2: failed to allocate polling page"); aoqi@0: os::set_polling_page(map_address); aoqi@0: aoqi@0: if (!UseMembar) { aoqi@0: address mem_serialize_page = (address) ::mmap(NULL, Aix::page_size(), PROT_READ | PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); aoqi@0: guarantee(mem_serialize_page != NULL, "mmap Failed for memory serialize page"); aoqi@0: os::set_memory_serialize_page(mem_serialize_page); aoqi@0: aoqi@0: #ifndef PRODUCT aoqi@0: if (Verbose && PrintMiscellaneous) aoqi@0: tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); aoqi@0: #endif aoqi@0: } aoqi@0: aoqi@0: // initialize suspend/resume support - must do this before signal_sets_init() aoqi@0: if (SR_initialize() != 0) { aoqi@0: perror("SR_initialize failed"); aoqi@0: return JNI_ERR; aoqi@0: } aoqi@0: aoqi@0: Aix::signal_sets_init(); aoqi@0: Aix::install_signal_handlers(); aoqi@0: aoqi@0: // Check minimum allowable stack size for thread creation and to initialize aoqi@0: // the java system classes, including StackOverflowError - depends on page aoqi@0: // size. Add a page for compiler2 recursion in main thread. aoqi@0: // Add in 2*BytesPerWord times page size to account for VM stack during aoqi@0: // class initialization depending on 32 or 64 bit VM. aoqi@0: os::Aix::min_stack_allowed = MAX2(os::Aix::min_stack_allowed, aoqi@0: (size_t)(StackYellowPages+StackRedPages+StackShadowPages + aoqi@0: 2*BytesPerWord COMPILER2_PRESENT(+1)) * Aix::page_size()); aoqi@0: aoqi@0: size_t threadStackSizeInBytes = ThreadStackSize * K; aoqi@0: if (threadStackSizeInBytes != 0 && aoqi@0: threadStackSizeInBytes < os::Aix::min_stack_allowed) { aoqi@0: tty->print_cr("\nThe stack size specified is too small, " aoqi@0: "Specify at least %dk", aoqi@0: os::Aix::min_stack_allowed / K); aoqi@0: return JNI_ERR; aoqi@0: } aoqi@0: aoqi@0: // Make the stack size a multiple of the page size so that aoqi@0: // the yellow/red zones can be guarded. aoqi@0: // note that this can be 0, if no default stacksize was set aoqi@0: JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, vm_page_size())); aoqi@0: aoqi@0: Aix::libpthread_init(); aoqi@0: aoqi@0: if (MaxFDLimit) { aoqi@0: // set the number of file descriptors to max. print out error aoqi@0: // if getrlimit/setrlimit fails but continue regardless. aoqi@0: struct rlimit nbr_files; aoqi@0: int status = getrlimit(RLIMIT_NOFILE, &nbr_files); aoqi@0: if (status != 0) { aoqi@0: if (PrintMiscellaneous && (Verbose || WizardMode)) aoqi@0: perror("os::init_2 getrlimit failed"); aoqi@0: } else { aoqi@0: nbr_files.rlim_cur = nbr_files.rlim_max; aoqi@0: status = setrlimit(RLIMIT_NOFILE, &nbr_files); aoqi@0: if (status != 0) { aoqi@0: if (PrintMiscellaneous && (Verbose || WizardMode)) aoqi@0: perror("os::init_2 setrlimit failed"); aoqi@0: } aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: if (PerfAllowAtExitRegistration) { aoqi@0: // only register atexit functions if PerfAllowAtExitRegistration is set. aoqi@0: // atexit functions can be delayed until process exit time, which aoqi@0: // can be problematic for embedded VM situations. Embedded VMs should aoqi@0: // call DestroyJavaVM() to assure that VM resources are released. aoqi@0: aoqi@0: // note: perfMemory_exit_helper atexit function may be removed in aoqi@0: // the future if the appropriate cleanup code can be added to the aoqi@0: // VM_Exit VMOperation's doit method. aoqi@0: if (atexit(perfMemory_exit_helper) != 0) { aoqi@0: warning("os::init_2 atexit(perfMemory_exit_helper) failed"); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: return JNI_OK; aoqi@0: } aoqi@0: aoqi@0: // this is called at the end of vm_initialization aoqi@0: void os::init_3(void) { aoqi@0: return; aoqi@0: } aoqi@0: aoqi@0: // Mark the polling page as unreadable aoqi@0: void os::make_polling_page_unreadable(void) { aoqi@0: if (!guard_memory((char*)_polling_page, Aix::page_size())) { aoqi@0: fatal("Could not disable polling page"); aoqi@0: } aoqi@0: }; aoqi@0: aoqi@0: // Mark the polling page as readable aoqi@0: void os::make_polling_page_readable(void) { aoqi@0: // Changed according to os_linux.cpp. aoqi@0: if (!checked_mprotect((char *)_polling_page, Aix::page_size(), PROT_READ)) { aoqi@0: fatal(err_msg("Could not enable polling page at " PTR_FORMAT, _polling_page)); aoqi@0: } aoqi@0: }; aoqi@0: aoqi@0: int os::active_processor_count() { aoqi@0: int online_cpus = ::sysconf(_SC_NPROCESSORS_ONLN); aoqi@0: assert(online_cpus > 0 && online_cpus <= processor_count(), "sanity check"); aoqi@0: return online_cpus; aoqi@0: } aoqi@0: aoqi@0: void os::set_native_thread_name(const char *name) { aoqi@0: // Not yet implemented. aoqi@0: return; aoqi@0: } aoqi@0: aoqi@0: bool os::distribute_processes(uint length, uint* distribution) { aoqi@0: // Not yet implemented. aoqi@0: return false; aoqi@0: } aoqi@0: aoqi@0: bool os::bind_to_processor(uint processor_id) { aoqi@0: // Not yet implemented. aoqi@0: return false; aoqi@0: } aoqi@0: aoqi@0: void os::SuspendedThreadTask::internal_do_task() { aoqi@0: if (do_suspend(_thread->osthread())) { aoqi@0: SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext()); aoqi@0: do_task(context); aoqi@0: do_resume(_thread->osthread()); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: class PcFetcher : public os::SuspendedThreadTask { aoqi@0: public: aoqi@0: PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {} aoqi@0: ExtendedPC result(); aoqi@0: protected: aoqi@0: void do_task(const os::SuspendedThreadTaskContext& context); aoqi@0: private: aoqi@0: ExtendedPC _epc; aoqi@0: }; aoqi@0: aoqi@0: ExtendedPC PcFetcher::result() { aoqi@0: guarantee(is_done(), "task is not done yet."); aoqi@0: return _epc; aoqi@0: } aoqi@0: aoqi@0: void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) { aoqi@0: Thread* thread = context.thread(); aoqi@0: OSThread* osthread = thread->osthread(); aoqi@0: if (osthread->ucontext() != NULL) { aoqi@0: _epc = os::Aix::ucontext_get_pc((ucontext_t *) context.ucontext()); aoqi@0: } else { aoqi@0: // NULL context is unexpected, double-check this is the VMThread. aoqi@0: guarantee(thread->is_VM_thread(), "can only be called for VMThread"); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // Suspends the target using the signal mechanism and then grabs the PC before aoqi@0: // resuming the target. Used by the flat-profiler only aoqi@0: ExtendedPC os::get_thread_pc(Thread* thread) { aoqi@0: // Make sure that it is called by the watcher for the VMThread. aoqi@0: assert(Thread::current()->is_Watcher_thread(), "Must be watcher"); aoqi@0: assert(thread->is_VM_thread(), "Can only be called for VMThread"); aoqi@0: aoqi@0: PcFetcher fetcher(thread); aoqi@0: fetcher.run(); aoqi@0: return fetcher.result(); aoqi@0: } aoqi@0: aoqi@0: // Not neede on Aix. aoqi@0: // int os::Aix::safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime) { aoqi@0: // } aoqi@0: aoqi@0: //////////////////////////////////////////////////////////////////////////////// aoqi@0: // debug support aoqi@0: aoqi@0: static address same_page(address x, address y) { aoqi@0: intptr_t page_bits = -os::vm_page_size(); aoqi@0: if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) aoqi@0: return x; aoqi@0: else if (x > y) aoqi@0: return (address)(intptr_t(y) | ~page_bits) + 1; aoqi@0: else aoqi@0: return (address)(intptr_t(y) & page_bits); aoqi@0: } aoqi@0: aoqi@0: bool os::find(address addr, outputStream* st) { aoqi@0: aoqi@0: st->print(PTR_FORMAT ": ", addr); aoqi@0: aoqi@0: const LoadedLibraryModule* lib = LoadedLibraries::find_for_text_address(addr); aoqi@0: if (lib) { aoqi@0: lib->print(st); aoqi@0: return true; aoqi@0: } else { aoqi@0: lib = LoadedLibraries::find_for_data_address(addr); aoqi@0: if (lib) { aoqi@0: lib->print(st); aoqi@0: return true; aoqi@0: } else { aoqi@0: st->print_cr("(outside any module)"); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: return false; aoqi@0: } aoqi@0: aoqi@0: //////////////////////////////////////////////////////////////////////////////// aoqi@0: // misc aoqi@0: aoqi@0: // This does not do anything on Aix. This is basically a hook for being aoqi@0: // able to use structured exception handling (thread-local exception filters) aoqi@0: // on, e.g., Win32. aoqi@0: void aoqi@0: os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, aoqi@0: JavaCallArguments* args, Thread* thread) { aoqi@0: f(value, method, args, thread); aoqi@0: } aoqi@0: aoqi@0: void os::print_statistics() { aoqi@0: } aoqi@0: aoqi@0: int os::message_box(const char* title, const char* message) { aoqi@0: int i; aoqi@0: fdStream err(defaultStream::error_fd()); aoqi@0: for (i = 0; i < 78; i++) err.print_raw("="); aoqi@0: err.cr(); aoqi@0: err.print_raw_cr(title); aoqi@0: for (i = 0; i < 78; i++) err.print_raw("-"); aoqi@0: err.cr(); aoqi@0: err.print_raw_cr(message); aoqi@0: for (i = 0; i < 78; i++) err.print_raw("="); aoqi@0: err.cr(); aoqi@0: aoqi@0: char buf[16]; aoqi@0: // Prevent process from exiting upon "read error" without consuming all CPU aoqi@0: while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } aoqi@0: aoqi@0: return buf[0] == 'y' || buf[0] == 'Y'; aoqi@0: } aoqi@0: aoqi@0: int os::stat(const char *path, struct stat *sbuf) { aoqi@0: char pathbuf[MAX_PATH]; aoqi@0: if (strlen(path) > MAX_PATH - 1) { aoqi@0: errno = ENAMETOOLONG; aoqi@0: return -1; aoqi@0: } aoqi@0: os::native_path(strcpy(pathbuf, path)); aoqi@0: return ::stat(pathbuf, sbuf); aoqi@0: } aoqi@0: aoqi@0: bool os::check_heap(bool force) { aoqi@0: return true; aoqi@0: } aoqi@0: aoqi@0: // int local_vsnprintf(char* buf, size_t count, const char* format, va_list args) { aoqi@0: // return ::vsnprintf(buf, count, format, args); aoqi@0: // } aoqi@0: aoqi@0: // Is a (classpath) directory empty? aoqi@0: bool os::dir_is_empty(const char* path) { aoqi@0: DIR *dir = NULL; aoqi@0: struct dirent *ptr; aoqi@0: aoqi@0: dir = opendir(path); aoqi@0: if (dir == NULL) return true; aoqi@0: aoqi@0: /* Scan the directory */ aoqi@0: bool result = true; aoqi@0: char buf[sizeof(struct dirent) + MAX_PATH]; aoqi@0: while (result && (ptr = ::readdir(dir)) != NULL) { aoqi@0: if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { aoqi@0: result = false; aoqi@0: } aoqi@0: } aoqi@0: closedir(dir); aoqi@0: return result; aoqi@0: } aoqi@0: aoqi@0: // This code originates from JDK's sysOpen and open64_w aoqi@0: // from src/solaris/hpi/src/system_md.c aoqi@0: aoqi@0: #ifndef O_DELETE aoqi@0: #define O_DELETE 0x10000 aoqi@0: #endif aoqi@0: aoqi@0: // Open a file. Unlink the file immediately after open returns aoqi@0: // if the specified oflag has the O_DELETE flag set. aoqi@0: // O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c aoqi@0: aoqi@0: int os::open(const char *path, int oflag, int mode) { aoqi@0: aoqi@0: if (strlen(path) > MAX_PATH - 1) { aoqi@0: errno = ENAMETOOLONG; aoqi@0: return -1; aoqi@0: } aoqi@0: int fd; aoqi@0: int o_delete = (oflag & O_DELETE); aoqi@0: oflag = oflag & ~O_DELETE; aoqi@0: aoqi@0: fd = ::open64(path, oflag, mode); aoqi@0: if (fd == -1) return -1; aoqi@0: aoqi@0: // If the open succeeded, the file might still be a directory. aoqi@0: { aoqi@0: struct stat64 buf64; aoqi@0: int ret = ::fstat64(fd, &buf64); aoqi@0: int st_mode = buf64.st_mode; aoqi@0: aoqi@0: if (ret != -1) { aoqi@0: if ((st_mode & S_IFMT) == S_IFDIR) { aoqi@0: errno = EISDIR; aoqi@0: ::close(fd); aoqi@0: return -1; aoqi@0: } aoqi@0: } else { aoqi@0: ::close(fd); aoqi@0: return -1; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // All file descriptors that are opened in the JVM and not aoqi@0: // specifically destined for a subprocess should have the aoqi@0: // close-on-exec flag set. If we don't set it, then careless 3rd aoqi@0: // party native code might fork and exec without closing all aoqi@0: // appropriate file descriptors (e.g. as we do in closeDescriptors in aoqi@0: // UNIXProcess.c), and this in turn might: aoqi@0: // aoqi@0: // - cause end-of-file to fail to be detected on some file aoqi@0: // descriptors, resulting in mysterious hangs, or aoqi@0: // aoqi@0: // - might cause an fopen in the subprocess to fail on a system aoqi@0: // suffering from bug 1085341. aoqi@0: // aoqi@0: // (Yes, the default setting of the close-on-exec flag is a Unix aoqi@0: // design flaw.) aoqi@0: // aoqi@0: // See: aoqi@0: // 1085341: 32-bit stdio routines should support file descriptors >255 aoqi@0: // 4843136: (process) pipe file descriptor from Runtime.exec not being closed aoqi@0: // 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 aoqi@0: #ifdef FD_CLOEXEC aoqi@0: { aoqi@0: int flags = ::fcntl(fd, F_GETFD); aoqi@0: if (flags != -1) aoqi@0: ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); aoqi@0: } aoqi@0: #endif aoqi@0: aoqi@0: if (o_delete != 0) { aoqi@0: ::unlink(path); aoqi@0: } aoqi@0: return fd; aoqi@0: } aoqi@0: aoqi@0: aoqi@0: // create binary file, rewriting existing file if required aoqi@0: int os::create_binary_file(const char* path, bool rewrite_existing) { aoqi@0: int oflags = O_WRONLY | O_CREAT; aoqi@0: if (!rewrite_existing) { aoqi@0: oflags |= O_EXCL; aoqi@0: } aoqi@0: return ::open64(path, oflags, S_IREAD | S_IWRITE); aoqi@0: } aoqi@0: aoqi@0: // return current position of file pointer aoqi@0: jlong os::current_file_offset(int fd) { aoqi@0: return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); aoqi@0: } aoqi@0: aoqi@0: // move file pointer to the specified offset aoqi@0: jlong os::seek_to_file_offset(int fd, jlong offset) { aoqi@0: return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); aoqi@0: } aoqi@0: aoqi@0: // This code originates from JDK's sysAvailable aoqi@0: // from src/solaris/hpi/src/native_threads/src/sys_api_td.c aoqi@0: aoqi@0: int os::available(int fd, jlong *bytes) { aoqi@0: jlong cur, end; aoqi@0: int mode; aoqi@0: struct stat64 buf64; aoqi@0: aoqi@0: if (::fstat64(fd, &buf64) >= 0) { aoqi@0: mode = buf64.st_mode; aoqi@0: if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { aoqi@0: // XXX: is the following call interruptible? If so, this might aoqi@0: // need to go through the INTERRUPT_IO() wrapper as for other aoqi@0: // blocking, interruptible calls in this file. aoqi@0: int n; aoqi@0: if (::ioctl(fd, FIONREAD, &n) >= 0) { aoqi@0: *bytes = n; aoqi@0: return 1; aoqi@0: } aoqi@0: } aoqi@0: } aoqi@0: if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { aoqi@0: return 0; aoqi@0: } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) { aoqi@0: return 0; aoqi@0: } else if (::lseek64(fd, cur, SEEK_SET) == -1) { aoqi@0: return 0; aoqi@0: } aoqi@0: *bytes = end - cur; aoqi@0: return 1; aoqi@0: } aoqi@0: aoqi@0: int os::socket_available(int fd, jint *pbytes) { aoqi@0: // Linux doc says EINTR not returned, unlike Solaris aoqi@0: int ret = ::ioctl(fd, FIONREAD, pbytes); aoqi@0: aoqi@0: //%% note ioctl can return 0 when successful, JVM_SocketAvailable aoqi@0: // is expected to return 0 on failure and 1 on success to the jdk. aoqi@0: return (ret < 0) ? 0 : 1; aoqi@0: } aoqi@0: aoqi@0: // Map a block of memory. aoqi@0: char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, aoqi@0: char *addr, size_t bytes, bool read_only, aoqi@0: bool allow_exec) { aoqi@0: Unimplemented(); aoqi@0: return NULL; aoqi@0: } aoqi@0: aoqi@0: aoqi@0: // Remap a block of memory. aoqi@0: char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, aoqi@0: char *addr, size_t bytes, bool read_only, aoqi@0: bool allow_exec) { aoqi@0: // same as map_memory() on this OS aoqi@0: return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, aoqi@0: allow_exec); aoqi@0: } aoqi@0: aoqi@0: // Unmap a block of memory. aoqi@0: bool os::pd_unmap_memory(char* addr, size_t bytes) { aoqi@0: return munmap(addr, bytes) == 0; aoqi@0: } aoqi@0: aoqi@0: // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) aoqi@0: // are used by JVM M&M and JVMTI to get user+sys or user CPU time aoqi@0: // of a thread. aoqi@0: // aoqi@0: // current_thread_cpu_time() and thread_cpu_time(Thread*) returns aoqi@0: // the fast estimate available on the platform. aoqi@0: aoqi@0: jlong os::current_thread_cpu_time() { aoqi@0: // return user + sys since the cost is the same aoqi@0: const jlong n = os::thread_cpu_time(Thread::current(), true /* user + sys */); aoqi@0: assert(n >= 0, "negative CPU time"); aoqi@0: return n; aoqi@0: } aoqi@0: aoqi@0: jlong os::thread_cpu_time(Thread* thread) { aoqi@0: // consistent with what current_thread_cpu_time() returns aoqi@0: const jlong n = os::thread_cpu_time(thread, true /* user + sys */); aoqi@0: assert(n >= 0, "negative CPU time"); aoqi@0: return n; aoqi@0: } aoqi@0: aoqi@0: jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { aoqi@0: const jlong n = os::thread_cpu_time(Thread::current(), user_sys_cpu_time); aoqi@0: assert(n >= 0, "negative CPU time"); aoqi@0: return n; aoqi@0: } aoqi@0: aoqi@0: static bool thread_cpu_time_unchecked(Thread* thread, jlong* p_sys_time, jlong* p_user_time) { aoqi@0: bool error = false; aoqi@0: aoqi@0: jlong sys_time = 0; aoqi@0: jlong user_time = 0; aoqi@0: aoqi@0: // reimplemented using getthrds64(). aoqi@0: // aoqi@0: // goes like this: aoqi@0: // For the thread in question, get the kernel thread id. Then get the aoqi@0: // kernel thread statistics using that id. aoqi@0: // aoqi@0: // This only works of course when no pthread scheduling is used, aoqi@0: // ie there is a 1:1 relationship to kernel threads. aoqi@0: // On AIX, see AIXTHREAD_SCOPE variable. aoqi@0: aoqi@0: pthread_t pthtid = thread->osthread()->pthread_id(); aoqi@0: aoqi@0: // retrieve kernel thread id for the pthread: aoqi@0: tid64_t tid = 0; aoqi@0: struct __pthrdsinfo pinfo; aoqi@0: // I just love those otherworldly IBM APIs which force me to hand down aoqi@0: // dummy buffers for stuff I dont care for... aoqi@0: char dummy[1]; aoqi@0: int dummy_size = sizeof(dummy); aoqi@0: if (pthread_getthrds_np(&pthtid, PTHRDSINFO_QUERY_TID, &pinfo, sizeof(pinfo), aoqi@0: dummy, &dummy_size) == 0) { aoqi@0: tid = pinfo.__pi_tid; aoqi@0: } else { aoqi@0: tty->print_cr("pthread_getthrds_np failed."); aoqi@0: error = true; aoqi@0: } aoqi@0: aoqi@0: // retrieve kernel timing info for that kernel thread aoqi@0: if (!error) { aoqi@0: struct thrdentry64 thrdentry; aoqi@0: if (getthrds64(getpid(), &thrdentry, sizeof(thrdentry), &tid, 1) == 1) { aoqi@0: sys_time = thrdentry.ti_ru.ru_stime.tv_sec * 1000000000LL + thrdentry.ti_ru.ru_stime.tv_usec * 1000LL; aoqi@0: user_time = thrdentry.ti_ru.ru_utime.tv_sec * 1000000000LL + thrdentry.ti_ru.ru_utime.tv_usec * 1000LL; aoqi@0: } else { aoqi@0: tty->print_cr("pthread_getthrds_np failed."); aoqi@0: error = true; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: if (p_sys_time) { aoqi@0: *p_sys_time = sys_time; aoqi@0: } aoqi@0: aoqi@0: if (p_user_time) { aoqi@0: *p_user_time = user_time; aoqi@0: } aoqi@0: aoqi@0: if (error) { aoqi@0: return false; aoqi@0: } aoqi@0: aoqi@0: return true; aoqi@0: } aoqi@0: aoqi@0: jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { aoqi@0: jlong sys_time; aoqi@0: jlong user_time; aoqi@0: aoqi@0: if (!thread_cpu_time_unchecked(thread, &sys_time, &user_time)) { aoqi@0: return -1; aoqi@0: } aoqi@0: aoqi@0: return user_sys_cpu_time ? sys_time + user_time : user_time; aoqi@0: } aoqi@0: aoqi@0: void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { aoqi@0: info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits aoqi@0: info_ptr->may_skip_backward = false; // elapsed time not wall time aoqi@0: info_ptr->may_skip_forward = false; // elapsed time not wall time aoqi@0: info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned aoqi@0: } aoqi@0: aoqi@0: void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { aoqi@0: info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits aoqi@0: info_ptr->may_skip_backward = false; // elapsed time not wall time aoqi@0: info_ptr->may_skip_forward = false; // elapsed time not wall time aoqi@0: info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned aoqi@0: } aoqi@0: aoqi@0: bool os::is_thread_cpu_time_supported() { aoqi@0: return true; aoqi@0: } aoqi@0: aoqi@0: // System loadavg support. Returns -1 if load average cannot be obtained. aoqi@0: // For now just return the system wide load average (no processor sets). aoqi@0: int os::loadavg(double values[], int nelem) { aoqi@0: aoqi@0: // Implemented using libperfstat on AIX. aoqi@0: aoqi@0: guarantee(nelem >= 0 && nelem <= 3, "argument error"); aoqi@0: guarantee(values, "argument error"); aoqi@0: aoqi@0: if (os::Aix::on_pase()) { aoqi@0: Unimplemented(); aoqi@0: return -1; aoqi@0: } else { aoqi@0: // AIX: use libperfstat aoqi@0: // aoqi@0: // See also: aoqi@0: // http://publib.boulder.ibm.com/infocenter/pseries/v5r3/index.jsp?topic=/com.ibm.aix.basetechref/doc/basetrf1/perfstat_cputot.htm aoqi@0: // /usr/include/libperfstat.h: aoqi@0: aoqi@0: // Use the already AIX version independent get_cpuinfo. aoqi@0: os::Aix::cpuinfo_t ci; aoqi@0: if (os::Aix::get_cpuinfo(&ci)) { aoqi@0: for (int i = 0; i < nelem; i++) { aoqi@0: values[i] = ci.loadavg[i]; aoqi@0: } aoqi@0: } else { aoqi@0: return -1; aoqi@0: } aoqi@0: return nelem; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: void os::pause() { aoqi@0: char filename[MAX_PATH]; aoqi@0: if (PauseAtStartupFile && PauseAtStartupFile[0]) { aoqi@0: jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); aoqi@0: } else { aoqi@0: jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); aoqi@0: } aoqi@0: aoqi@0: int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); aoqi@0: if (fd != -1) { aoqi@0: struct stat buf; aoqi@0: ::close(fd); aoqi@0: while (::stat(filename, &buf) == 0) { aoqi@0: (void)::poll(NULL, 0, 100); aoqi@0: } aoqi@0: } else { aoqi@0: jio_fprintf(stderr, aoqi@0: "Could not open pause file '%s', continuing immediately.\n", filename); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: bool os::Aix::is_primordial_thread() { aoqi@0: if (pthread_self() == (pthread_t)1) { aoqi@0: return true; aoqi@0: } else { aoqi@0: return false; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // OS recognitions (PASE/AIX, OS level) call this before calling any aoqi@0: // one of Aix::on_pase(), Aix::os_version() static aoqi@0: void os::Aix::initialize_os_info() { aoqi@0: aoqi@0: assert(_on_pase == -1 && _os_version == -1, "already called."); aoqi@0: aoqi@0: struct utsname uts; aoqi@0: memset(&uts, 0, sizeof(uts)); aoqi@0: strcpy(uts.sysname, "?"); aoqi@0: if (::uname(&uts) == -1) { aoqi@0: fprintf(stderr, "uname failed (%d)\n", errno); aoqi@0: guarantee(0, "Could not determine whether we run on AIX or PASE"); aoqi@0: } else { aoqi@0: if (Verbose) { aoqi@0: fprintf(stderr,"uname says: sysname \"%s\" version \"%s\" release \"%s\" " aoqi@0: "node \"%s\" machine \"%s\"\n", aoqi@0: uts.sysname, uts.version, uts.release, uts.nodename, uts.machine); aoqi@0: } aoqi@0: const int major = atoi(uts.version); aoqi@0: assert(major > 0, "invalid OS version"); aoqi@0: const int minor = atoi(uts.release); aoqi@0: assert(minor > 0, "invalid OS release"); aoqi@0: _os_version = (major << 8) | minor; aoqi@0: if (strcmp(uts.sysname, "OS400") == 0) { aoqi@0: Unimplemented(); aoqi@0: } else if (strcmp(uts.sysname, "AIX") == 0) { aoqi@0: // We run on AIX. We do not support versions older than AIX 5.3. aoqi@0: _on_pase = 0; aoqi@0: if (_os_version < 0x0503) { aoqi@0: fprintf(stderr, "AIX release older than AIX 5.3 not supported.\n"); aoqi@0: assert(false, "AIX release too old."); aoqi@0: } else { aoqi@0: if (Verbose) { aoqi@0: fprintf(stderr, "We run on AIX %d.%d\n", major, minor); aoqi@0: } aoqi@0: } aoqi@0: } else { aoqi@0: assert(false, "unknown OS"); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: guarantee(_on_pase != -1 && _os_version, "Could not determine AIX/OS400 release"); aoqi@0: aoqi@0: } // end: os::Aix::initialize_os_info() aoqi@0: aoqi@0: // Scan environment for important settings which might effect the VM. aoqi@0: // Trace out settings. Warn about invalid settings and/or correct them. aoqi@0: // aoqi@0: // Must run after os::Aix::initialue_os_info(). aoqi@0: void os::Aix::scan_environment() { aoqi@0: aoqi@0: char* p; aoqi@0: int rc; aoqi@0: aoqi@0: // Warn explicity if EXTSHM=ON is used. That switch changes how aoqi@0: // System V shared memory behaves. One effect is that page size of aoqi@0: // shared memory cannot be change dynamically, effectivly preventing aoqi@0: // large pages from working. aoqi@0: // This switch was needed on AIX 32bit, but on AIX 64bit the general aoqi@0: // recommendation is (in OSS notes) to switch it off. aoqi@0: p = ::getenv("EXTSHM"); aoqi@0: if (Verbose) { aoqi@0: fprintf(stderr, "EXTSHM=%s.\n", p ? p : ""); aoqi@0: } aoqi@0: if (p && strcmp(p, "ON") == 0) { aoqi@0: fprintf(stderr, "Unsupported setting: EXTSHM=ON. Large Page support will be disabled.\n"); aoqi@0: _extshm = 1; aoqi@0: } else { aoqi@0: _extshm = 0; aoqi@0: } aoqi@0: aoqi@0: // SPEC1170 behaviour: will change the behaviour of a number of POSIX APIs. aoqi@0: // Not tested, not supported. aoqi@0: // aoqi@0: // Note that it might be worth the trouble to test and to require it, if only to aoqi@0: // get useful return codes for mprotect. aoqi@0: // aoqi@0: // Note: Setting XPG_SUS_ENV in the process is too late. Must be set earlier (before aoqi@0: // exec() ? before loading the libjvm ? ....) aoqi@0: p = ::getenv("XPG_SUS_ENV"); aoqi@0: if (Verbose) { aoqi@0: fprintf(stderr, "XPG_SUS_ENV=%s.\n", p ? p : ""); aoqi@0: } aoqi@0: if (p && strcmp(p, "ON") == 0) { aoqi@0: _xpg_sus_mode = 1; aoqi@0: fprintf(stderr, "Unsupported setting: XPG_SUS_ENV=ON\n"); aoqi@0: // This is not supported. Worst of all, it changes behaviour of mmap MAP_FIXED to aoqi@0: // clobber address ranges. If we ever want to support that, we have to do some aoqi@0: // testing first. aoqi@0: guarantee(false, "XPG_SUS_ENV=ON not supported"); aoqi@0: } else { aoqi@0: _xpg_sus_mode = 0; aoqi@0: } aoqi@0: aoqi@0: // Switch off AIX internal (pthread) guard pages. This has aoqi@0: // immediate effect for any pthread_create calls which follow. aoqi@0: p = ::getenv("AIXTHREAD_GUARDPAGES"); aoqi@0: if (Verbose) { aoqi@0: fprintf(stderr, "AIXTHREAD_GUARDPAGES=%s.\n", p ? p : ""); aoqi@0: fprintf(stderr, "setting AIXTHREAD_GUARDPAGES=0.\n"); aoqi@0: } aoqi@0: rc = ::putenv("AIXTHREAD_GUARDPAGES=0"); aoqi@0: guarantee(rc == 0, ""); aoqi@0: aoqi@0: } // end: os::Aix::scan_environment() aoqi@0: aoqi@0: // PASE: initialize the libo4 library (AS400 PASE porting library). aoqi@0: void os::Aix::initialize_libo4() { aoqi@0: Unimplemented(); aoqi@0: } aoqi@0: aoqi@0: // AIX: initialize the libperfstat library (we load this dynamically aoqi@0: // because it is only available on AIX. aoqi@0: void os::Aix::initialize_libperfstat() { aoqi@0: aoqi@0: assert(os::Aix::on_aix(), "AIX only"); aoqi@0: aoqi@0: if (!libperfstat::init()) { aoqi@0: fprintf(stderr, "libperfstat initialization failed.\n"); aoqi@0: assert(false, "libperfstat initialization failed"); aoqi@0: } else { aoqi@0: if (Verbose) { aoqi@0: fprintf(stderr, "libperfstat initialized.\n"); aoqi@0: } aoqi@0: } aoqi@0: } // end: os::Aix::initialize_libperfstat aoqi@0: aoqi@0: ///////////////////////////////////////////////////////////////////////////// aoqi@0: // thread stack aoqi@0: aoqi@0: // function to query the current stack size using pthread_getthrds_np aoqi@0: // aoqi@0: // ! do not change anything here unless you know what you are doing ! aoqi@0: static void query_stack_dimensions(address* p_stack_base, size_t* p_stack_size) { aoqi@0: aoqi@0: // This only works when invoked on a pthread. As we agreed not to use aoqi@0: // primordial threads anyway, I assert here aoqi@0: guarantee(!os::Aix::is_primordial_thread(), "not allowed on the primordial thread"); aoqi@0: aoqi@0: // information about this api can be found (a) in the pthread.h header and aoqi@0: // (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: // aoqi@0: // The use of this API to find out the current stack is kind of undefined. aoqi@0: // But after a lot of tries and asking IBM about it, I concluded that it is safe aoqi@0: // enough for cases where I let the pthread library create its stacks. For cases aoqi@0: // where I create an own stack and pass this to pthread_create, it seems not to aoqi@0: // work (the returned stack size in that case is 0). aoqi@0: aoqi@0: pthread_t tid = pthread_self(); aoqi@0: struct __pthrdsinfo pinfo; aoqi@0: char dummy[1]; // we only need this to satisfy the api and to not get E aoqi@0: int dummy_size = sizeof(dummy); aoqi@0: aoqi@0: memset(&pinfo, 0, sizeof(pinfo)); aoqi@0: aoqi@0: const int rc = pthread_getthrds_np (&tid, PTHRDSINFO_QUERY_ALL, &pinfo, aoqi@0: sizeof(pinfo), dummy, &dummy_size); aoqi@0: aoqi@0: if (rc != 0) { aoqi@0: fprintf(stderr, "pthread_getthrds_np failed (%d)\n", rc); aoqi@0: guarantee(0, "pthread_getthrds_np failed"); aoqi@0: } aoqi@0: aoqi@0: guarantee(pinfo.__pi_stackend, "returned stack base invalid"); aoqi@0: aoqi@0: // the following can happen when invoking pthread_getthrds_np on a pthread running on a user provided stack aoqi@0: // (when handing down a stack to pthread create, see pthread_attr_setstackaddr). aoqi@0: // Not sure what to do here - I feel inclined to forbid this use case completely. aoqi@0: guarantee(pinfo.__pi_stacksize, "returned stack size invalid"); aoqi@0: aoqi@0: // On AIX, stacks are not necessarily page aligned so round the base and size accordingly aoqi@0: if (p_stack_base) { aoqi@0: (*p_stack_base) = (address) align_size_up((intptr_t)pinfo.__pi_stackend, os::Aix::stack_page_size()); aoqi@0: } aoqi@0: aoqi@0: if (p_stack_size) { aoqi@0: (*p_stack_size) = pinfo.__pi_stacksize - os::Aix::stack_page_size(); aoqi@0: } aoqi@0: aoqi@0: #ifndef PRODUCT aoqi@0: if (Verbose) { aoqi@0: fprintf(stderr, aoqi@0: "query_stack_dimensions() -> real stack_base=" INTPTR_FORMAT ", real stack_addr=" INTPTR_FORMAT aoqi@0: ", real stack_size=" INTPTR_FORMAT aoqi@0: ", stack_base=" INTPTR_FORMAT ", stack_size=" INTPTR_FORMAT "\n", aoqi@0: (intptr_t)pinfo.__pi_stackend, (intptr_t)pinfo.__pi_stackaddr, pinfo.__pi_stacksize, aoqi@0: (intptr_t)align_size_up((intptr_t)pinfo.__pi_stackend, os::Aix::stack_page_size()), aoqi@0: pinfo.__pi_stacksize - os::Aix::stack_page_size()); aoqi@0: } aoqi@0: #endif aoqi@0: aoqi@0: } // end query_stack_dimensions aoqi@0: aoqi@0: // get the current stack base from the OS (actually, the pthread library) aoqi@0: address os::current_stack_base() { aoqi@0: address p; aoqi@0: query_stack_dimensions(&p, 0); aoqi@0: return p; aoqi@0: } aoqi@0: aoqi@0: // get the current stack size from the OS (actually, the pthread library) aoqi@0: size_t os::current_stack_size() { aoqi@0: size_t s; aoqi@0: query_stack_dimensions(0, &s); aoqi@0: return s; aoqi@0: } aoqi@0: aoqi@0: // Refer to the comments in os_solaris.cpp park-unpark. aoqi@0: // aoqi@0: // Beware -- Some versions of NPTL embody a flaw where pthread_cond_timedwait() can aoqi@0: // hang indefinitely. For instance NPTL 0.60 on 2.4.21-4ELsmp is vulnerable. aoqi@0: // For specifics regarding the bug see GLIBC BUGID 261237 : aoqi@0: // http://www.mail-archive.com/debian-glibc@lists.debian.org/msg10837.html. aoqi@0: // Briefly, pthread_cond_timedwait() calls with an expiry time that's not in the future aoqi@0: // will either hang or corrupt the condvar, resulting in subsequent hangs if the condvar aoqi@0: // is used. (The simple C test-case provided in the GLIBC bug report manifests the aoqi@0: // hang). The JVM is vulernable via sleep(), Object.wait(timo), LockSupport.parkNanos() aoqi@0: // and monitorenter when we're using 1-0 locking. All those operations may result in aoqi@0: // calls to pthread_cond_timedwait(). Using LD_ASSUME_KERNEL to use an older version aoqi@0: // of libpthread avoids the problem, but isn't practical. aoqi@0: // aoqi@0: // Possible remedies: aoqi@0: // aoqi@0: // 1. Establish a minimum relative wait time. 50 to 100 msecs seems to work. aoqi@0: // This is palliative and probabilistic, however. If the thread is preempted aoqi@0: // between the call to compute_abstime() and pthread_cond_timedwait(), more aoqi@0: // than the minimum period may have passed, and the abstime may be stale (in the aoqi@0: // past) resultin in a hang. Using this technique reduces the odds of a hang aoqi@0: // but the JVM is still vulnerable, particularly on heavily loaded systems. aoqi@0: // aoqi@0: // 2. Modify park-unpark to use per-thread (per ParkEvent) pipe-pairs instead aoqi@0: // of the usual flag-condvar-mutex idiom. The write side of the pipe is set aoqi@0: // NDELAY. unpark() reduces to write(), park() reduces to read() and park(timo) aoqi@0: // reduces to poll()+read(). This works well, but consumes 2 FDs per extant aoqi@0: // thread. aoqi@0: // aoqi@0: // 3. Embargo pthread_cond_timedwait() and implement a native "chron" thread aoqi@0: // that manages timeouts. We'd emulate pthread_cond_timedwait() by enqueuing aoqi@0: // a timeout request to the chron thread and then blocking via pthread_cond_wait(). aoqi@0: // This also works well. In fact it avoids kernel-level scalability impediments aoqi@0: // on certain platforms that don't handle lots of active pthread_cond_timedwait() aoqi@0: // timers in a graceful fashion. aoqi@0: // aoqi@0: // 4. When the abstime value is in the past it appears that control returns aoqi@0: // correctly from pthread_cond_timedwait(), but the condvar is left corrupt. aoqi@0: // Subsequent timedwait/wait calls may hang indefinitely. Given that, we aoqi@0: // can avoid the problem by reinitializing the condvar -- by cond_destroy() aoqi@0: // followed by cond_init() -- after all calls to pthread_cond_timedwait(). aoqi@0: // It may be possible to avoid reinitialization by checking the return aoqi@0: // value from pthread_cond_timedwait(). In addition to reinitializing the aoqi@0: // condvar we must establish the invariant that cond_signal() is only called aoqi@0: // within critical sections protected by the adjunct mutex. This prevents aoqi@0: // cond_signal() from "seeing" a condvar that's in the midst of being aoqi@0: // reinitialized or that is corrupt. Sadly, this invariant obviates the aoqi@0: // desirable signal-after-unlock optimization that avoids futile context switching. aoqi@0: // aoqi@0: // I'm also concerned that some versions of NTPL might allocate an auxilliary aoqi@0: // structure when a condvar is used or initialized. cond_destroy() would aoqi@0: // release the helper structure. Our reinitialize-after-timedwait fix aoqi@0: // put excessive stress on malloc/free and locks protecting the c-heap. aoqi@0: // aoqi@0: // We currently use (4). See the WorkAroundNTPLTimedWaitHang flag. aoqi@0: // It may be possible to refine (4) by checking the kernel and NTPL verisons aoqi@0: // and only enabling the work-around for vulnerable environments. aoqi@0: aoqi@0: // utility to compute the abstime argument to timedwait: aoqi@0: // millis is the relative timeout time aoqi@0: // abstime will be the absolute timeout time aoqi@0: // TODO: replace compute_abstime() with unpackTime() aoqi@0: aoqi@0: static struct timespec* compute_abstime(timespec* abstime, jlong millis) { aoqi@0: if (millis < 0) millis = 0; aoqi@0: struct timeval now; aoqi@0: int status = gettimeofday(&now, NULL); aoqi@0: assert(status == 0, "gettimeofday"); aoqi@0: jlong seconds = millis / 1000; aoqi@0: millis %= 1000; aoqi@0: if (seconds > 50000000) { // see man cond_timedwait(3T) aoqi@0: seconds = 50000000; aoqi@0: } aoqi@0: abstime->tv_sec = now.tv_sec + seconds; aoqi@0: long usec = now.tv_usec + millis * 1000; aoqi@0: if (usec >= 1000000) { aoqi@0: abstime->tv_sec += 1; aoqi@0: usec -= 1000000; aoqi@0: } aoqi@0: abstime->tv_nsec = usec * 1000; aoqi@0: return abstime; aoqi@0: } aoqi@0: aoqi@0: aoqi@0: // Test-and-clear _Event, always leaves _Event set to 0, returns immediately. aoqi@0: // Conceptually TryPark() should be equivalent to park(0). aoqi@0: aoqi@0: int os::PlatformEvent::TryPark() { aoqi@0: for (;;) { aoqi@0: const int v = _Event; aoqi@0: guarantee ((v == 0) || (v == 1), "invariant"); aoqi@0: if (Atomic::cmpxchg (0, &_Event, v) == v) return v; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: void os::PlatformEvent::park() { // AKA "down()" aoqi@0: // Invariant: Only the thread associated with the Event/PlatformEvent aoqi@0: // may call park(). aoqi@0: // TODO: assert that _Assoc != NULL or _Assoc == Self aoqi@0: int v; aoqi@0: for (;;) { aoqi@0: v = _Event; aoqi@0: if (Atomic::cmpxchg (v-1, &_Event, v) == v) break; aoqi@0: } aoqi@0: guarantee (v >= 0, "invariant"); aoqi@0: if (v == 0) { aoqi@0: // Do this the hard way by blocking ... aoqi@0: int status = pthread_mutex_lock(_mutex); aoqi@0: assert_status(status == 0, status, "mutex_lock"); aoqi@0: guarantee (_nParked == 0, "invariant"); aoqi@0: ++ _nParked; aoqi@0: while (_Event < 0) { aoqi@0: status = pthread_cond_wait(_cond, _mutex); aoqi@0: assert_status(status == 0 || status == ETIMEDOUT, status, "cond_timedwait"); aoqi@0: } aoqi@0: -- _nParked; aoqi@0: aoqi@0: // In theory we could move the ST of 0 into _Event past the unlock(), aoqi@0: // but then we'd need a MEMBAR after the ST. aoqi@0: _Event = 0; aoqi@0: status = pthread_mutex_unlock(_mutex); aoqi@0: assert_status(status == 0, status, "mutex_unlock"); aoqi@0: } aoqi@0: guarantee (_Event >= 0, "invariant"); aoqi@0: } aoqi@0: aoqi@0: int os::PlatformEvent::park(jlong millis) { aoqi@0: guarantee (_nParked == 0, "invariant"); aoqi@0: aoqi@0: int v; aoqi@0: for (;;) { aoqi@0: v = _Event; aoqi@0: if (Atomic::cmpxchg (v-1, &_Event, v) == v) break; aoqi@0: } aoqi@0: guarantee (v >= 0, "invariant"); aoqi@0: if (v != 0) return OS_OK; aoqi@0: aoqi@0: // We do this the hard way, by blocking the thread. aoqi@0: // Consider enforcing a minimum timeout value. aoqi@0: struct timespec abst; aoqi@0: compute_abstime(&abst, millis); aoqi@0: aoqi@0: int ret = OS_TIMEOUT; aoqi@0: int status = pthread_mutex_lock(_mutex); aoqi@0: assert_status(status == 0, status, "mutex_lock"); aoqi@0: guarantee (_nParked == 0, "invariant"); aoqi@0: ++_nParked; aoqi@0: aoqi@0: // Object.wait(timo) will return because of aoqi@0: // (a) notification aoqi@0: // (b) timeout aoqi@0: // (c) thread.interrupt aoqi@0: // aoqi@0: // Thread.interrupt and object.notify{All} both call Event::set. aoqi@0: // That is, we treat thread.interrupt as a special case of notification. aoqi@0: // The underlying Solaris implementation, cond_timedwait, admits aoqi@0: // spurious/premature wakeups, but the JLS/JVM spec prevents the aoqi@0: // JVM from making those visible to Java code. As such, we must aoqi@0: // filter out spurious wakeups. We assume all ETIME returns are valid. aoqi@0: // aoqi@0: // TODO: properly differentiate simultaneous notify+interrupt. aoqi@0: // In that case, we should propagate the notify to another waiter. aoqi@0: aoqi@0: while (_Event < 0) { aoqi@0: status = pthread_cond_timedwait(_cond, _mutex, &abst); aoqi@0: assert_status(status == 0 || status == ETIMEDOUT, aoqi@0: status, "cond_timedwait"); aoqi@0: if (!FilterSpuriousWakeups) break; // previous semantics aoqi@0: if (status == ETIMEDOUT) break; aoqi@0: // We consume and ignore EINTR and spurious wakeups. aoqi@0: } aoqi@0: --_nParked; aoqi@0: if (_Event >= 0) { aoqi@0: ret = OS_OK; aoqi@0: } aoqi@0: _Event = 0; aoqi@0: status = pthread_mutex_unlock(_mutex); aoqi@0: assert_status(status == 0, status, "mutex_unlock"); aoqi@0: assert (_nParked == 0, "invariant"); aoqi@0: return ret; aoqi@0: } aoqi@0: aoqi@0: void os::PlatformEvent::unpark() { aoqi@0: int v, AnyWaiters; aoqi@0: for (;;) { aoqi@0: v = _Event; aoqi@0: if (v > 0) { aoqi@0: // The LD of _Event could have reordered or be satisfied aoqi@0: // by a read-aside from this processor's write buffer. aoqi@0: // To avoid problems execute a barrier and then aoqi@0: // ratify the value. aoqi@0: OrderAccess::fence(); aoqi@0: if (_Event == v) return; aoqi@0: continue; aoqi@0: } aoqi@0: if (Atomic::cmpxchg (v+1, &_Event, v) == v) break; aoqi@0: } aoqi@0: if (v < 0) { aoqi@0: // Wait for the thread associated with the event to vacate aoqi@0: int status = pthread_mutex_lock(_mutex); aoqi@0: assert_status(status == 0, status, "mutex_lock"); aoqi@0: AnyWaiters = _nParked; aoqi@0: aoqi@0: if (AnyWaiters != 0) { aoqi@0: // We intentional signal *after* dropping the lock aoqi@0: // to avoid a common class of futile wakeups. aoqi@0: status = pthread_cond_signal(_cond); aoqi@0: assert_status(status == 0, status, "cond_signal"); aoqi@0: } aoqi@0: // Mutex should be locked for pthread_cond_signal(_cond). aoqi@0: status = pthread_mutex_unlock(_mutex); aoqi@0: assert_status(status == 0, status, "mutex_unlock"); aoqi@0: } aoqi@0: aoqi@0: // Note that we signal() _after dropping the lock for "immortal" Events. aoqi@0: // This is safe and avoids a common class of futile wakeups. In rare aoqi@0: // circumstances this can cause a thread to return prematurely from aoqi@0: // cond_{timed}wait() but the spurious wakeup is benign and the victim will aoqi@0: // simply re-test the condition and re-park itself. aoqi@0: } aoqi@0: aoqi@0: aoqi@0: // JSR166 aoqi@0: // ------------------------------------------------------- aoqi@0: aoqi@0: // aoqi@0: // The solaris and linux implementations of park/unpark are fairly aoqi@0: // conservative for now, but can be improved. They currently use a aoqi@0: // mutex/condvar pair, plus a a count. aoqi@0: // Park decrements count if > 0, else does a condvar wait. Unpark aoqi@0: // sets count to 1 and signals condvar. Only one thread ever waits aoqi@0: // on the condvar. Contention seen when trying to park implies that someone aoqi@0: // is unparking you, so don't wait. And spurious returns are fine, so there aoqi@0: // is no need to track notifications. aoqi@0: // aoqi@0: aoqi@0: #define MAX_SECS 100000000 aoqi@0: // aoqi@0: // This code is common to linux and solaris and will be moved to a aoqi@0: // common place in dolphin. aoqi@0: // aoqi@0: // The passed in time value is either a relative time in nanoseconds aoqi@0: // or an absolute time in milliseconds. Either way it has to be unpacked aoqi@0: // into suitable seconds and nanoseconds components and stored in the aoqi@0: // given timespec structure. aoqi@0: // Given time is a 64-bit value and the time_t used in the timespec is only aoqi@0: // a signed-32-bit value (except on 64-bit Linux) we have to watch for aoqi@0: // overflow if times way in the future are given. Further on Solaris versions aoqi@0: // prior to 10 there is a restriction (see cond_timedwait) that the specified aoqi@0: // number of seconds, in abstime, is less than current_time + 100,000,000. aoqi@0: // As it will be 28 years before "now + 100000000" will overflow we can aoqi@0: // ignore overflow and just impose a hard-limit on seconds using the value aoqi@0: // of "now + 100,000,000". This places a limit on the timeout of about 3.17 aoqi@0: // years from "now". aoqi@0: // aoqi@0: aoqi@0: static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { aoqi@0: assert (time > 0, "convertTime"); aoqi@0: aoqi@0: struct timeval now; aoqi@0: int status = gettimeofday(&now, NULL); aoqi@0: assert(status == 0, "gettimeofday"); aoqi@0: aoqi@0: time_t max_secs = now.tv_sec + MAX_SECS; aoqi@0: aoqi@0: if (isAbsolute) { aoqi@0: jlong secs = time / 1000; aoqi@0: if (secs > max_secs) { aoqi@0: absTime->tv_sec = max_secs; aoqi@0: } aoqi@0: else { aoqi@0: absTime->tv_sec = secs; aoqi@0: } aoqi@0: absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; aoqi@0: } aoqi@0: else { aoqi@0: jlong secs = time / NANOSECS_PER_SEC; aoqi@0: if (secs >= MAX_SECS) { aoqi@0: absTime->tv_sec = max_secs; aoqi@0: absTime->tv_nsec = 0; aoqi@0: } aoqi@0: else { aoqi@0: absTime->tv_sec = now.tv_sec + secs; aoqi@0: absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; aoqi@0: if (absTime->tv_nsec >= NANOSECS_PER_SEC) { aoqi@0: absTime->tv_nsec -= NANOSECS_PER_SEC; aoqi@0: ++absTime->tv_sec; // note: this must be <= max_secs aoqi@0: } aoqi@0: } aoqi@0: } aoqi@0: assert(absTime->tv_sec >= 0, "tv_sec < 0"); aoqi@0: assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); aoqi@0: assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); aoqi@0: assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); aoqi@0: } aoqi@0: aoqi@0: void Parker::park(bool isAbsolute, jlong time) { aoqi@0: // Optional fast-path check: aoqi@0: // Return immediately if a permit is available. aoqi@0: if (_counter > 0) { aoqi@0: _counter = 0; aoqi@0: OrderAccess::fence(); aoqi@0: return; aoqi@0: } aoqi@0: aoqi@0: Thread* thread = Thread::current(); aoqi@0: assert(thread->is_Java_thread(), "Must be JavaThread"); aoqi@0: JavaThread *jt = (JavaThread *)thread; aoqi@0: aoqi@0: // Optional optimization -- avoid state transitions if there's an interrupt pending. aoqi@0: // Check interrupt before trying to wait aoqi@0: if (Thread::is_interrupted(thread, false)) { aoqi@0: return; aoqi@0: } aoqi@0: aoqi@0: // Next, demultiplex/decode time arguments aoqi@0: timespec absTime; aoqi@0: if (time < 0 || (isAbsolute && time == 0)) { // don't wait at all aoqi@0: return; aoqi@0: } aoqi@0: if (time > 0) { aoqi@0: unpackTime(&absTime, isAbsolute, time); aoqi@0: } aoqi@0: aoqi@0: aoqi@0: // Enter safepoint region aoqi@0: // Beware of deadlocks such as 6317397. aoqi@0: // The per-thread Parker:: mutex is a classic leaf-lock. aoqi@0: // In particular a thread must never block on the Threads_lock while aoqi@0: // holding the Parker:: mutex. If safepoints are pending both the aoqi@0: // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. aoqi@0: ThreadBlockInVM tbivm(jt); aoqi@0: aoqi@0: // Don't wait if cannot get lock since interference arises from aoqi@0: // unblocking. Also. check interrupt before trying wait aoqi@0: if (Thread::is_interrupted(thread, false) || pthread_mutex_trylock(_mutex) != 0) { aoqi@0: return; aoqi@0: } aoqi@0: aoqi@0: int status; aoqi@0: if (_counter > 0) { // no wait needed aoqi@0: _counter = 0; aoqi@0: status = pthread_mutex_unlock(_mutex); aoqi@0: assert (status == 0, "invariant"); aoqi@0: OrderAccess::fence(); aoqi@0: return; aoqi@0: } aoqi@0: aoqi@0: #ifdef ASSERT aoqi@0: // Don't catch signals while blocked; let the running threads have the signals. aoqi@0: // (This allows a debugger to break into the running thread.) aoqi@0: sigset_t oldsigs; aoqi@0: sigset_t* allowdebug_blocked = os::Aix::allowdebug_blocked_signals(); aoqi@0: pthread_sigmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); aoqi@0: #endif aoqi@0: aoqi@0: OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); aoqi@0: jt->set_suspend_equivalent(); aoqi@0: // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() aoqi@0: aoqi@0: if (time == 0) { aoqi@0: status = pthread_cond_wait (_cond, _mutex); aoqi@0: } else { aoqi@0: status = pthread_cond_timedwait (_cond, _mutex, &absTime); aoqi@0: if (status != 0 && WorkAroundNPTLTimedWaitHang) { aoqi@0: pthread_cond_destroy (_cond); aoqi@0: pthread_cond_init (_cond, NULL); aoqi@0: } aoqi@0: } aoqi@0: assert_status(status == 0 || status == EINTR || aoqi@0: status == ETIME || status == ETIMEDOUT, aoqi@0: status, "cond_timedwait"); aoqi@0: aoqi@0: #ifdef ASSERT aoqi@0: pthread_sigmask(SIG_SETMASK, &oldsigs, NULL); aoqi@0: #endif aoqi@0: aoqi@0: _counter = 0; aoqi@0: status = pthread_mutex_unlock(_mutex); aoqi@0: assert_status(status == 0, status, "invariant"); aoqi@0: // If externally suspended while waiting, re-suspend aoqi@0: if (jt->handle_special_suspend_equivalent_condition()) { aoqi@0: jt->java_suspend_self(); aoqi@0: } aoqi@0: aoqi@0: OrderAccess::fence(); aoqi@0: } aoqi@0: aoqi@0: void Parker::unpark() { aoqi@0: int s, status; aoqi@0: status = pthread_mutex_lock(_mutex); aoqi@0: assert (status == 0, "invariant"); aoqi@0: s = _counter; aoqi@0: _counter = 1; aoqi@0: if (s < 1) { aoqi@0: if (WorkAroundNPTLTimedWaitHang) { aoqi@0: status = pthread_cond_signal (_cond); aoqi@0: assert (status == 0, "invariant"); aoqi@0: status = pthread_mutex_unlock(_mutex); aoqi@0: assert (status == 0, "invariant"); aoqi@0: } else { aoqi@0: status = pthread_mutex_unlock(_mutex); aoqi@0: assert (status == 0, "invariant"); aoqi@0: status = pthread_cond_signal (_cond); aoqi@0: assert (status == 0, "invariant"); aoqi@0: } aoqi@0: } else { aoqi@0: pthread_mutex_unlock(_mutex); aoqi@0: assert (status == 0, "invariant"); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: aoqi@0: extern char** environ; aoqi@0: aoqi@0: // Run the specified command in a separate process. Return its exit value, aoqi@0: // or -1 on failure (e.g. can't fork a new process). aoqi@0: // Unlike system(), this function can be called from signal handler. It aoqi@0: // doesn't block SIGINT et al. aoqi@0: int os::fork_and_exec(char* cmd) { aoqi@0: char * argv[4] = {"sh", "-c", cmd, NULL}; aoqi@0: aoqi@0: pid_t pid = fork(); aoqi@0: aoqi@0: if (pid < 0) { aoqi@0: // fork failed aoqi@0: return -1; aoqi@0: aoqi@0: } else if (pid == 0) { aoqi@0: // child process aoqi@0: aoqi@0: // try to be consistent with system(), which uses "/usr/bin/sh" on AIX aoqi@0: execve("/usr/bin/sh", argv, environ); aoqi@0: aoqi@0: // execve failed aoqi@0: _exit(-1); aoqi@0: aoqi@0: } else { aoqi@0: // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't aoqi@0: // care about the actual exit code, for now. aoqi@0: aoqi@0: int status; aoqi@0: aoqi@0: // Wait for the child process to exit. This returns immediately if aoqi@0: // the child has already exited. */ aoqi@0: while (waitpid(pid, &status, 0) < 0) { aoqi@0: switch (errno) { aoqi@0: case ECHILD: return 0; aoqi@0: case EINTR: break; aoqi@0: default: return -1; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: if (WIFEXITED(status)) { aoqi@0: // The child exited normally; get its exit code. aoqi@0: return WEXITSTATUS(status); aoqi@0: } else if (WIFSIGNALED(status)) { aoqi@0: // The child exited because of a signal aoqi@0: // The best value to return is 0x80 + signal number, aoqi@0: // because that is what all Unix shells do, and because aoqi@0: // it allows callers to distinguish between process exit and aoqi@0: // process death by signal. aoqi@0: return 0x80 + WTERMSIG(status); aoqi@0: } else { aoqi@0: // Unknown exit code; pass it through aoqi@0: return status; aoqi@0: } aoqi@0: } aoqi@0: // Remove warning. aoqi@0: return -1; aoqi@0: } aoqi@0: aoqi@0: // is_headless_jre() aoqi@0: // aoqi@0: // Test for the existence of xawt/libmawt.so or libawt_xawt.so aoqi@0: // in order to report if we are running in a headless jre. aoqi@0: // aoqi@0: // Since JDK8 xawt/libmawt.so is moved into the same directory aoqi@0: // as libawt.so, and renamed libawt_xawt.so aoqi@0: bool os::is_headless_jre() { aoqi@0: struct stat statbuf; aoqi@0: char buf[MAXPATHLEN]; aoqi@0: char libmawtpath[MAXPATHLEN]; aoqi@0: const char *xawtstr = "/xawt/libmawt.so"; aoqi@0: const char *new_xawtstr = "/libawt_xawt.so"; aoqi@0: aoqi@0: char *p; aoqi@0: aoqi@0: // Get path to libjvm.so aoqi@0: os::jvm_path(buf, sizeof(buf)); aoqi@0: aoqi@0: // Get rid of libjvm.so aoqi@0: p = strrchr(buf, '/'); aoqi@0: if (p == NULL) return false; aoqi@0: else *p = '\0'; aoqi@0: aoqi@0: // Get rid of client or server aoqi@0: p = strrchr(buf, '/'); aoqi@0: if (p == NULL) return false; aoqi@0: else *p = '\0'; aoqi@0: aoqi@0: // check xawt/libmawt.so aoqi@0: strcpy(libmawtpath, buf); aoqi@0: strcat(libmawtpath, xawtstr); aoqi@0: if (::stat(libmawtpath, &statbuf) == 0) return false; aoqi@0: aoqi@0: // check libawt_xawt.so aoqi@0: strcpy(libmawtpath, buf); aoqi@0: strcat(libmawtpath, new_xawtstr); aoqi@0: if (::stat(libmawtpath, &statbuf) == 0) return false; aoqi@0: aoqi@0: return true; aoqi@0: } aoqi@0: aoqi@0: // Get the default path to the core file aoqi@0: // Returns the length of the string aoqi@0: int os::get_core_path(char* buffer, size_t bufferSize) { aoqi@0: const char* p = get_current_directory(buffer, bufferSize); aoqi@0: aoqi@0: if (p == NULL) { aoqi@0: assert(p != NULL, "failed to get current directory"); aoqi@0: return 0; aoqi@0: } aoqi@0: aoqi@0: return strlen(buffer); aoqi@0: } aoqi@0: aoqi@0: #ifndef PRODUCT aoqi@0: void TestReserveMemorySpecial_test() { aoqi@0: // No tests available for this platform aoqi@0: } aoqi@0: #endif