| /* |
| * Copyright (c) 1999, 2021, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| // no precompiled headers |
| #include "jvm.h" |
| #include "classfile/vmSymbols.hpp" |
| #include "code/icBuffer.hpp" |
| #include "code/vtableStubs.hpp" |
| #include "compiler/compileBroker.hpp" |
| #include "compiler/disassembler.hpp" |
| #include "interpreter/interpreter.hpp" |
| #include "jvmtifiles/jvmti.h" |
| #include "logging/log.hpp" |
| #include "logging/logStream.hpp" |
| #include "memory/allocation.inline.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "os_bsd.inline.hpp" |
| #include "os_posix.inline.hpp" |
| #include "os_share_bsd.hpp" |
| #include "prims/jniFastGetField.hpp" |
| #include "prims/jvm_misc.hpp" |
| #include "runtime/arguments.hpp" |
| #include "runtime/atomic.hpp" |
| #include "runtime/globals.hpp" |
| #include "runtime/globals_extension.hpp" |
| #include "runtime/interfaceSupport.inline.hpp" |
| #include "runtime/java.hpp" |
| #include "runtime/javaCalls.hpp" |
| #include "runtime/mutexLocker.hpp" |
| #include "runtime/objectMonitor.hpp" |
| #include "runtime/osThread.hpp" |
| #include "runtime/perfMemory.hpp" |
| #include "runtime/semaphore.hpp" |
| #include "runtime/sharedRuntime.hpp" |
| #include "runtime/statSampler.hpp" |
| #include "runtime/stubRoutines.hpp" |
| #include "runtime/thread.inline.hpp" |
| #include "runtime/threadCritical.hpp" |
| #include "runtime/timer.hpp" |
| #include "services/attachListener.hpp" |
| #include "services/memTracker.hpp" |
| #include "services/runtimeService.hpp" |
| #include "signals_posix.hpp" |
| #include "utilities/align.hpp" |
| #include "utilities/decoder.hpp" |
| #include "utilities/defaultStream.hpp" |
| #include "utilities/events.hpp" |
| #include "utilities/growableArray.hpp" |
| #include "utilities/vmError.hpp" |
| |
| // put OS-includes here |
| # include <dlfcn.h> |
| # include <errno.h> |
| # include <fcntl.h> |
| # include <inttypes.h> |
| # include <poll.h> |
| # include <pthread.h> |
| # include <pwd.h> |
| # include <signal.h> |
| # include <stdint.h> |
| # include <stdio.h> |
| # include <string.h> |
| # include <sys/ioctl.h> |
| # include <sys/mman.h> |
| # include <sys/param.h> |
| # include <sys/resource.h> |
| # include <sys/socket.h> |
| # include <sys/stat.h> |
| # include <sys/syscall.h> |
| # include <sys/sysctl.h> |
| # include <sys/time.h> |
| # include <sys/times.h> |
| # include <sys/types.h> |
| # include <time.h> |
| # include <unistd.h> |
| |
| #if defined(__FreeBSD__) || defined(__NetBSD__) |
| #include <elf.h> |
| #endif |
| |
| #ifdef __APPLE__ |
| #include <mach-o/dyld.h> |
| #endif |
| |
| #ifndef MAP_ANONYMOUS |
| #define MAP_ANONYMOUS MAP_ANON |
| #endif |
| |
| #define MAX_PATH (2 * K) |
| |
| // for timer info max values which include all bits |
| #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // global variables |
| julong os::Bsd::_physical_memory = 0; |
| |
| #ifdef __APPLE__ |
| mach_timebase_info_data_t os::Bsd::_timebase_info = {0, 0}; |
| volatile uint64_t os::Bsd::_max_abstime = 0; |
| #endif |
| pthread_t os::Bsd::_main_thread; |
| int os::Bsd::_page_size = -1; |
| |
| static jlong initial_time_count=0; |
| |
| static int clock_tics_per_sec = 100; |
| |
| #if defined(__APPLE__) && defined(__x86_64__) |
| static const int processor_id_unassigned = -1; |
| static const int processor_id_assigning = -2; |
| static const int processor_id_map_size = 256; |
| static volatile int processor_id_map[processor_id_map_size]; |
| static volatile int processor_id_next = 0; |
| #endif |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // utility functions |
| |
| julong os::available_memory() { |
| return Bsd::available_memory(); |
| } |
| |
| // available here means free |
| julong os::Bsd::available_memory() { |
| uint64_t available = physical_memory() >> 2; |
| #ifdef __APPLE__ |
| mach_msg_type_number_t count = HOST_VM_INFO64_COUNT; |
| vm_statistics64_data_t vmstat; |
| kern_return_t kerr = host_statistics64(mach_host_self(), HOST_VM_INFO64, |
| (host_info64_t)&vmstat, &count); |
| assert(kerr == KERN_SUCCESS, |
| "host_statistics64 failed - check mach_host_self() and count"); |
| if (kerr == KERN_SUCCESS) { |
| available = vmstat.free_count * os::vm_page_size(); |
| } |
| #endif |
| return available; |
| } |
| |
| // for more info see : |
| // https://man.openbsd.org/sysctl.2 |
| void os::Bsd::print_uptime_info(outputStream* st) { |
| struct timeval boottime; |
| size_t len = sizeof(boottime); |
| int mib[2]; |
| mib[0] = CTL_KERN; |
| mib[1] = KERN_BOOTTIME; |
| |
| if (sysctl(mib, 2, &boottime, &len, NULL, 0) >= 0) { |
| time_t bootsec = boottime.tv_sec; |
| time_t currsec = time(NULL); |
| os::print_dhm(st, "OS uptime:", (long) difftime(currsec, bootsec)); |
| } |
| } |
| |
| julong os::physical_memory() { |
| return Bsd::physical_memory(); |
| } |
| |
| // Return true if user is running as root. |
| |
| bool os::have_special_privileges() { |
| static bool init = false; |
| static bool privileges = false; |
| if (!init) { |
| privileges = (getuid() != geteuid()) || (getgid() != getegid()); |
| init = true; |
| } |
| return privileges; |
| } |
| |
| |
| |
| // Cpu architecture string |
| #if defined(ZERO) |
| static char cpu_arch[] = ZERO_LIBARCH; |
| #elif defined(IA64) |
| static char cpu_arch[] = "ia64"; |
| #elif defined(IA32) |
| static char cpu_arch[] = "i386"; |
| #elif defined(AMD64) |
| static char cpu_arch[] = "amd64"; |
| #elif defined(ARM) |
| static char cpu_arch[] = "arm"; |
| #elif defined(AARCH64) |
| static char cpu_arch[] = "aarch64"; |
| #elif defined(PPC32) |
| static char cpu_arch[] = "ppc"; |
| #else |
| #error Add appropriate cpu_arch setting |
| #endif |
| |
| // Compiler variant |
| #ifdef COMPILER2 |
| #define COMPILER_VARIANT "server" |
| #else |
| #define COMPILER_VARIANT "client" |
| #endif |
| |
| |
| void os::Bsd::initialize_system_info() { |
| int mib[2]; |
| size_t len; |
| int cpu_val; |
| julong mem_val; |
| |
| // get processors count via hw.ncpus sysctl |
| mib[0] = CTL_HW; |
| mib[1] = HW_NCPU; |
| len = sizeof(cpu_val); |
| if (sysctl(mib, 2, &cpu_val, &len, NULL, 0) != -1 && cpu_val >= 1) { |
| assert(len == sizeof(cpu_val), "unexpected data size"); |
| set_processor_count(cpu_val); |
| } else { |
| set_processor_count(1); // fallback |
| } |
| |
| #if defined(__APPLE__) && defined(__x86_64__) |
| // initialize processor id map |
| for (int i = 0; i < processor_id_map_size; i++) { |
| processor_id_map[i] = processor_id_unassigned; |
| } |
| #endif |
| |
| // get physical memory via hw.memsize sysctl (hw.memsize is used |
| // since it returns a 64 bit value) |
| mib[0] = CTL_HW; |
| |
| #if defined (HW_MEMSIZE) // Apple |
| mib[1] = HW_MEMSIZE; |
| #elif defined(HW_PHYSMEM) // Most of BSD |
| mib[1] = HW_PHYSMEM; |
| #elif defined(HW_REALMEM) // Old FreeBSD |
| mib[1] = HW_REALMEM; |
| #else |
| #error No ways to get physmem |
| #endif |
| |
| len = sizeof(mem_val); |
| if (sysctl(mib, 2, &mem_val, &len, NULL, 0) != -1) { |
| assert(len == sizeof(mem_val), "unexpected data size"); |
| _physical_memory = mem_val; |
| } else { |
| _physical_memory = 256 * 1024 * 1024; // fallback (XXXBSD?) |
| } |
| |
| #ifdef __OpenBSD__ |
| { |
| // limit _physical_memory memory view on OpenBSD since |
| // datasize rlimit restricts us anyway. |
| struct rlimit limits; |
| getrlimit(RLIMIT_DATA, &limits); |
| _physical_memory = MIN2(_physical_memory, (julong)limits.rlim_cur); |
| } |
| #endif |
| } |
| |
| #ifdef __APPLE__ |
| static const char *get_home() { |
| const char *home_dir = ::getenv("HOME"); |
| if ((home_dir == NULL) || (*home_dir == '\0')) { |
| struct passwd *passwd_info = getpwuid(geteuid()); |
| if (passwd_info != NULL) { |
| home_dir = passwd_info->pw_dir; |
| } |
| } |
| |
| return home_dir; |
| } |
| #endif |
| |
| void os::init_system_properties_values() { |
| // The next steps are taken in the product version: |
| // |
| // Obtain the JAVA_HOME value from the location of libjvm.so. |
| // This library should be located at: |
| // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so. |
| // |
| // If "/jre/lib/" appears at the right place in the path, then we |
| // assume libjvm.so is installed in a JDK and we use this path. |
| // |
| // Otherwise exit with message: "Could not create the Java virtual machine." |
| // |
| // The following extra steps are taken in the debugging version: |
| // |
| // If "/jre/lib/" does NOT appear at the right place in the path |
| // instead of exit check for $JAVA_HOME environment variable. |
| // |
| // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, |
| // then we append a fake suffix "hotspot/libjvm.so" to this path so |
| // it looks like libjvm.so is installed there |
| // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so. |
| // |
| // Otherwise exit. |
| // |
| // Important note: if the location of libjvm.so changes this |
| // code needs to be changed accordingly. |
| |
| // See ld(1): |
| // The linker uses the following search paths to locate required |
| // shared libraries: |
| // 1: ... |
| // ... |
| // 7: The default directories, normally /lib and /usr/lib. |
| #ifndef DEFAULT_LIBPATH |
| #ifndef OVERRIDE_LIBPATH |
| #define DEFAULT_LIBPATH "/lib:/usr/lib" |
| #else |
| #define DEFAULT_LIBPATH OVERRIDE_LIBPATH |
| #endif |
| #endif |
| |
| // Base path of extensions installed on the system. |
| #define SYS_EXT_DIR "/usr/java/packages" |
| #define EXTENSIONS_DIR "/lib/ext" |
| |
| #ifndef __APPLE__ |
| |
| // Buffer that fits several sprintfs. |
| // Note that the space for the colon and the trailing null are provided |
| // by the nulls included by the sizeof operator. |
| const size_t bufsize = |
| MAX2((size_t)MAXPATHLEN, // For dll_dir & friends. |
| (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR) + sizeof(SYS_EXT_DIR) + sizeof(EXTENSIONS_DIR)); // extensions dir |
| char *buf = NEW_C_HEAP_ARRAY(char, bufsize, mtInternal); |
| |
| // sysclasspath, java_home, dll_dir |
| { |
| char *pslash; |
| os::jvm_path(buf, bufsize); |
| |
| // Found the full path to libjvm.so. |
| // Now cut the path to <java_home>/jre if we can. |
| *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so. |
| pslash = strrchr(buf, '/'); |
| if (pslash != NULL) { |
| *pslash = '\0'; // Get rid of /{client|server|hotspot}. |
| } |
| Arguments::set_dll_dir(buf); |
| |
| if (pslash != NULL) { |
| pslash = strrchr(buf, '/'); |
| if (pslash != NULL) { |
| *pslash = '\0'; // Get rid of /<arch>. |
| pslash = strrchr(buf, '/'); |
| if (pslash != NULL) { |
| *pslash = '\0'; // Get rid of /lib. |
| } |
| } |
| } |
| Arguments::set_java_home(buf); |
| if (!set_boot_path('/', ':')) { |
| vm_exit_during_initialization("Failed setting boot class path.", NULL); |
| } |
| } |
| |
| // Where to look for native libraries. |
| // |
| // Note: Due to a legacy implementation, most of the library path |
| // is set in the launcher. This was to accomodate linking restrictions |
| // on legacy Bsd implementations (which are no longer supported). |
| // Eventually, all the library path setting will be done here. |
| // |
| // However, to prevent the proliferation of improperly built native |
| // libraries, the new path component /usr/java/packages is added here. |
| // Eventually, all the library path setting will be done here. |
| { |
| // Get the user setting of LD_LIBRARY_PATH, and prepended it. It |
| // should always exist (until the legacy problem cited above is |
| // addressed). |
| const char *v = ::getenv("LD_LIBRARY_PATH"); |
| const char *v_colon = ":"; |
| if (v == NULL) { v = ""; v_colon = ""; } |
| // That's +1 for the colon and +1 for the trailing '\0'. |
| char *ld_library_path = NEW_C_HEAP_ARRAY(char, |
| strlen(v) + 1 + |
| sizeof(SYS_EXT_DIR) + sizeof("/lib/") + strlen(cpu_arch) + sizeof(DEFAULT_LIBPATH) + 1, |
| mtInternal); |
| sprintf(ld_library_path, "%s%s" SYS_EXT_DIR "/lib/%s:" DEFAULT_LIBPATH, v, v_colon, cpu_arch); |
| Arguments::set_library_path(ld_library_path); |
| FREE_C_HEAP_ARRAY(char, ld_library_path); |
| } |
| |
| // Extensions directories. |
| sprintf(buf, "%s" EXTENSIONS_DIR ":" SYS_EXT_DIR EXTENSIONS_DIR, Arguments::get_java_home()); |
| Arguments::set_ext_dirs(buf); |
| |
| FREE_C_HEAP_ARRAY(char, buf); |
| |
| #else // __APPLE__ |
| |
| #define SYS_EXTENSIONS_DIR "/Library/Java/Extensions" |
| #define SYS_EXTENSIONS_DIRS SYS_EXTENSIONS_DIR ":/Network" SYS_EXTENSIONS_DIR ":/System" SYS_EXTENSIONS_DIR ":/usr/lib/java" |
| |
| const char *user_home_dir = get_home(); |
| // The null in SYS_EXTENSIONS_DIRS counts for the size of the colon after user_home_dir. |
| size_t system_ext_size = strlen(user_home_dir) + sizeof(SYS_EXTENSIONS_DIR) + |
| sizeof(SYS_EXTENSIONS_DIRS); |
| |
| // Buffer that fits several sprintfs. |
| // Note that the space for the colon and the trailing null are provided |
| // by the nulls included by the sizeof operator. |
| const size_t bufsize = |
| MAX2((size_t)MAXPATHLEN, // for dll_dir & friends. |
| (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR) + system_ext_size); // extensions dir |
| char *buf = NEW_C_HEAP_ARRAY(char, bufsize, mtInternal); |
| |
| // sysclasspath, java_home, dll_dir |
| { |
| char *pslash; |
| os::jvm_path(buf, bufsize); |
| |
| // Found the full path to libjvm.so. |
| // Now cut the path to <java_home>/jre if we can. |
| *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so. |
| pslash = strrchr(buf, '/'); |
| if (pslash != NULL) { |
| *pslash = '\0'; // Get rid of /{client|server|hotspot}. |
| } |
| #ifdef STATIC_BUILD |
| strcat(buf, "/lib"); |
| #endif |
| |
| Arguments::set_dll_dir(buf); |
| |
| if (pslash != NULL) { |
| pslash = strrchr(buf, '/'); |
| if (pslash != NULL) { |
| *pslash = '\0'; // Get rid of /lib. |
| } |
| } |
| Arguments::set_java_home(buf); |
| if (!set_boot_path('/', ':')) { |
| vm_exit_during_initialization("Failed setting boot class path.", NULL); |
| } |
| } |
| |
| // Where to look for native libraries. |
| // |
| // Note: Due to a legacy implementation, most of the library path |
| // is set in the launcher. This was to accomodate linking restrictions |
| // on legacy Bsd implementations (which are no longer supported). |
| // Eventually, all the library path setting will be done here. |
| // |
| // However, to prevent the proliferation of improperly built native |
| // libraries, the new path component /usr/java/packages is added here. |
| // Eventually, all the library path setting will be done here. |
| { |
| // Get the user setting of LD_LIBRARY_PATH, and prepended it. It |
| // should always exist (until the legacy problem cited above is |
| // addressed). |
| // Prepend the default path with the JAVA_LIBRARY_PATH so that the app launcher code |
| // can specify a directory inside an app wrapper |
| const char *l = ::getenv("JAVA_LIBRARY_PATH"); |
| const char *l_colon = ":"; |
| if (l == NULL) { l = ""; l_colon = ""; } |
| |
| const char *v = ::getenv("DYLD_LIBRARY_PATH"); |
| const char *v_colon = ":"; |
| if (v == NULL) { v = ""; v_colon = ""; } |
| |
| // Apple's Java6 has "." at the beginning of java.library.path. |
| // OpenJDK on Windows has "." at the end of java.library.path. |
| // OpenJDK on Linux and Solaris don't have "." in java.library.path |
| // at all. To ease the transition from Apple's Java6 to OpenJDK7, |
| // "." is appended to the end of java.library.path. Yes, this |
| // could cause a change in behavior, but Apple's Java6 behavior |
| // can be achieved by putting "." at the beginning of the |
| // JAVA_LIBRARY_PATH environment variable. |
| char *ld_library_path = NEW_C_HEAP_ARRAY(char, |
| strlen(v) + 1 + strlen(l) + 1 + |
| system_ext_size + 3, |
| mtInternal); |
| sprintf(ld_library_path, "%s%s%s%s%s" SYS_EXTENSIONS_DIR ":" SYS_EXTENSIONS_DIRS ":.", |
| v, v_colon, l, l_colon, user_home_dir); |
| Arguments::set_library_path(ld_library_path); |
| FREE_C_HEAP_ARRAY(char, ld_library_path); |
| } |
| |
| // Extensions directories. |
| // |
| // Note that the space for the colon and the trailing null are provided |
| // by the nulls included by the sizeof operator (so actually one byte more |
| // than necessary is allocated). |
| sprintf(buf, "%s" SYS_EXTENSIONS_DIR ":%s" EXTENSIONS_DIR ":" SYS_EXTENSIONS_DIRS, |
| user_home_dir, Arguments::get_java_home()); |
| Arguments::set_ext_dirs(buf); |
| |
| FREE_C_HEAP_ARRAY(char, buf); |
| |
| #undef SYS_EXTENSIONS_DIR |
| #undef SYS_EXTENSIONS_DIRS |
| |
| #endif // __APPLE__ |
| |
| #undef SYS_EXT_DIR |
| #undef EXTENSIONS_DIR |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // breakpoint support |
| |
| void os::breakpoint() { |
| BREAKPOINT; |
| } |
| |
| extern "C" void breakpoint() { |
| // use debugger to set breakpoint here |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| // create new thread |
| |
| #ifdef __APPLE__ |
| // library handle for calling objc_registerThreadWithCollector() |
| // without static linking to the libobjc library |
| #define OBJC_LIB "/usr/lib/libobjc.dylib" |
| #define OBJC_GCREGISTER "objc_registerThreadWithCollector" |
| typedef void (*objc_registerThreadWithCollector_t)(); |
| extern "C" objc_registerThreadWithCollector_t objc_registerThreadWithCollectorFunction; |
| objc_registerThreadWithCollector_t objc_registerThreadWithCollectorFunction = NULL; |
| #endif |
| |
| // Thread start routine for all newly created threads |
| static void *thread_native_entry(Thread *thread) { |
| |
| thread->record_stack_base_and_size(); |
| thread->initialize_thread_current(); |
| |
| OSThread* osthread = thread->osthread(); |
| Monitor* sync = osthread->startThread_lock(); |
| |
| osthread->set_thread_id(os::Bsd::gettid()); |
| |
| #ifdef __APPLE__ |
| // Store unique OS X thread id used by SA |
| osthread->set_unique_thread_id(); |
| #endif |
| |
| // initialize signal mask for this thread |
| PosixSignals::hotspot_sigmask(thread); |
| |
| // initialize floating point control register |
| os::Bsd::init_thread_fpu_state(); |
| |
| #ifdef __APPLE__ |
| // register thread with objc gc |
| if (objc_registerThreadWithCollectorFunction != NULL) { |
| objc_registerThreadWithCollectorFunction(); |
| } |
| #endif |
| |
| // handshaking with parent thread |
| { |
| MutexLocker ml(sync, Mutex::_no_safepoint_check_flag); |
| |
| // notify parent thread |
| osthread->set_state(INITIALIZED); |
| sync->notify_all(); |
| |
| // wait until os::start_thread() |
| while (osthread->get_state() == INITIALIZED) { |
| sync->wait_without_safepoint_check(); |
| } |
| } |
| |
| log_info(os, thread)("Thread is alive (tid: " UINTX_FORMAT ", pthread id: " UINTX_FORMAT ").", |
| os::current_thread_id(), (uintx) pthread_self()); |
| |
| // call one more level start routine |
| thread->call_run(); |
| |
| // Note: at this point the thread object may already have deleted itself. |
| // Prevent dereferencing it from here on out. |
| thread = NULL; |
| |
| log_info(os, thread)("Thread finished (tid: " UINTX_FORMAT ", pthread id: " UINTX_FORMAT ").", |
| os::current_thread_id(), (uintx) pthread_self()); |
| |
| return 0; |
| } |
| |
| bool os::create_thread(Thread* thread, ThreadType thr_type, |
| size_t req_stack_size) { |
| assert(thread->osthread() == NULL, "caller responsible"); |
| |
| // Allocate the OSThread object |
| OSThread* osthread = new OSThread(NULL, NULL); |
| if (osthread == NULL) { |
| return false; |
| } |
| |
| // set the correct thread state |
| osthread->set_thread_type(thr_type); |
| |
| // Initial state is ALLOCATED but not INITIALIZED |
| osthread->set_state(ALLOCATED); |
| |
| thread->set_osthread(osthread); |
| |
| // init thread attributes |
| pthread_attr_t attr; |
| pthread_attr_init(&attr); |
| pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); |
| |
| // calculate stack size if it's not specified by caller |
| size_t stack_size = os::Posix::get_initial_stack_size(thr_type, req_stack_size); |
| int status = pthread_attr_setstacksize(&attr, stack_size); |
| assert_status(status == 0, status, "pthread_attr_setstacksize"); |
| |
| ThreadState state; |
| |
| { |
| |
| ResourceMark rm; |
| pthread_t tid; |
| int ret = 0; |
| int limit = 3; |
| do { |
| ret = pthread_create(&tid, &attr, (void* (*)(void*)) thread_native_entry, thread); |
| } while (ret == EAGAIN && limit-- > 0); |
| |
| char buf[64]; |
| if (ret == 0) { |
| log_info(os, thread)("Thread \"%s\" started (pthread id: " UINTX_FORMAT ", attributes: %s). ", |
| thread->name(), (uintx) tid, os::Posix::describe_pthread_attr(buf, sizeof(buf), &attr)); |
| } else { |
| log_warning(os, thread)("Failed to start thread \"%s\" - pthread_create failed (%s) for attributes: %s.", |
| thread->name(), os::errno_name(ret), os::Posix::describe_pthread_attr(buf, sizeof(buf), &attr)); |
| // Log some OS information which might explain why creating the thread failed. |
| log_info(os, thread)("Number of threads approx. running in the VM: %d", Threads::number_of_threads()); |
| LogStream st(Log(os, thread)::info()); |
| os::Posix::print_rlimit_info(&st); |
| os::print_memory_info(&st); |
| } |
| |
| pthread_attr_destroy(&attr); |
| |
| if (ret != 0) { |
| // Need to clean up stuff we've allocated so far |
| thread->set_osthread(NULL); |
| delete osthread; |
| return false; |
| } |
| |
| // Store pthread info into the OSThread |
| osthread->set_pthread_id(tid); |
| |
| // Wait until child thread is either initialized or aborted |
| { |
| Monitor* sync_with_child = osthread->startThread_lock(); |
| MutexLocker ml(sync_with_child, Mutex::_no_safepoint_check_flag); |
| while ((state = osthread->get_state()) == ALLOCATED) { |
| sync_with_child->wait_without_safepoint_check(); |
| } |
| } |
| |
| } |
| |
| // The thread is returned suspended (in state INITIALIZED), |
| // and is started higher up in the call chain |
| assert(state == INITIALIZED, "race condition"); |
| return true; |
| } |
| |
| ///////////////////////////////////////////////////////////////////////////// |
| // attach existing thread |
| |
| // bootstrap the main thread |
| bool os::create_main_thread(JavaThread* thread) { |
| assert(os::Bsd::_main_thread == pthread_self(), "should be called inside main thread"); |
| return create_attached_thread(thread); |
| } |
| |
| bool os::create_attached_thread(JavaThread* thread) { |
| #ifdef ASSERT |
| thread->verify_not_published(); |
| #endif |
| |
| // Allocate the OSThread object |
| OSThread* osthread = new OSThread(NULL, NULL); |
| |
| if (osthread == NULL) { |
| return false; |
| } |
| |
| osthread->set_thread_id(os::Bsd::gettid()); |
| |
| #ifdef __APPLE__ |
| // Store unique OS X thread id used by SA |
| osthread->set_unique_thread_id(); |
| #endif |
| |
| // Store pthread info into the OSThread |
| osthread->set_pthread_id(::pthread_self()); |
| |
| // initialize floating point control register |
| os::Bsd::init_thread_fpu_state(); |
| |
| // Initial thread state is RUNNABLE |
| osthread->set_state(RUNNABLE); |
| |
| thread->set_osthread(osthread); |
| |
| // initialize signal mask for this thread |
| // and save the caller's signal mask |
| PosixSignals::hotspot_sigmask(thread); |
| |
| log_info(os, thread)("Thread attached (tid: " UINTX_FORMAT ", pthread id: " UINTX_FORMAT ").", |
| os::current_thread_id(), (uintx) pthread_self()); |
| |
| return true; |
| } |
| |
| void os::pd_start_thread(Thread* thread) { |
| OSThread * osthread = thread->osthread(); |
| assert(osthread->get_state() != INITIALIZED, "just checking"); |
| Monitor* sync_with_child = osthread->startThread_lock(); |
| MutexLocker ml(sync_with_child, Mutex::_no_safepoint_check_flag); |
| sync_with_child->notify(); |
| } |
| |
| // Free Bsd resources related to the OSThread |
| void os::free_thread(OSThread* osthread) { |
| assert(osthread != NULL, "osthread not set"); |
| |
| // We are told to free resources of the argument thread, |
| // but we can only really operate on the current thread. |
| assert(Thread::current()->osthread() == osthread, |
| "os::free_thread but not current thread"); |
| |
| // Restore caller's signal mask |
| sigset_t sigmask = osthread->caller_sigmask(); |
| pthread_sigmask(SIG_SETMASK, &sigmask, NULL); |
| |
| delete osthread; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // time support |
| |
| // Time since start-up in seconds to a fine granularity. |
| double os::elapsedTime() { |
| return ((double)os::elapsed_counter()) / os::elapsed_frequency(); |
| } |
| |
| jlong os::elapsed_counter() { |
| return javaTimeNanos() - initial_time_count; |
| } |
| |
| jlong os::elapsed_frequency() { |
| return NANOSECS_PER_SEC; // nanosecond resolution |
| } |
| |
| bool os::supports_vtime() { return true; } |
| |
| double os::elapsedVTime() { |
| // better than nothing, but not much |
| return elapsedTime(); |
| } |
| |
| #ifdef __APPLE__ |
| void os::Bsd::clock_init() { |
| mach_timebase_info(&_timebase_info); |
| } |
| #else |
| void os::Bsd::clock_init() { |
| // Nothing to do |
| } |
| #endif |
| |
| |
| |
| #ifdef __APPLE__ |
| |
| jlong os::javaTimeNanos() { |
| const uint64_t tm = mach_absolute_time(); |
| const uint64_t now = (tm * Bsd::_timebase_info.numer) / Bsd::_timebase_info.denom; |
| const uint64_t prev = Bsd::_max_abstime; |
| if (now <= prev) { |
| return prev; // same or retrograde time; |
| } |
| const uint64_t obsv = Atomic::cmpxchg(&Bsd::_max_abstime, prev, now); |
| assert(obsv >= prev, "invariant"); // Monotonicity |
| // If the CAS succeeded then we're done and return "now". |
| // If the CAS failed and the observed value "obsv" is >= now then |
| // we should return "obsv". If the CAS failed and now > obsv > prv then |
| // some other thread raced this thread and installed a new value, in which case |
| // we could either (a) retry the entire operation, (b) retry trying to install now |
| // or (c) just return obsv. We use (c). No loop is required although in some cases |
| // we might discard a higher "now" value in deference to a slightly lower but freshly |
| // installed obsv value. That's entirely benign -- it admits no new orderings compared |
| // to (a) or (b) -- and greatly reduces coherence traffic. |
| // We might also condition (c) on the magnitude of the delta between obsv and now. |
| // Avoiding excessive CAS operations to hot RW locations is critical. |
| // See https://blogs.oracle.com/dave/entry/cas_and_cache_trivia_invalidate |
| return (prev == obsv) ? now : obsv; |
| } |
| |
| void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { |
| info_ptr->max_value = ALL_64_BITS; |
| info_ptr->may_skip_backward = false; // not subject to resetting or drifting |
| info_ptr->may_skip_forward = false; // not subject to resetting or drifting |
| info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time |
| } |
| |
| #endif // __APPLE__ |
| |
| // Return the real, user, and system times in seconds from an |
| // arbitrary fixed point in the past. |
| bool os::getTimesSecs(double* process_real_time, |
| double* process_user_time, |
| double* process_system_time) { |
| struct tms ticks; |
| clock_t real_ticks = times(&ticks); |
| |
| if (real_ticks == (clock_t) (-1)) { |
| return false; |
| } else { |
| double ticks_per_second = (double) clock_tics_per_sec; |
| *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; |
| *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; |
| *process_real_time = ((double) real_ticks) / ticks_per_second; |
| |
| return true; |
| } |
| } |
| |
| |
| char * os::local_time_string(char *buf, size_t buflen) { |
| struct tm t; |
| time_t long_time; |
| time(&long_time); |
| localtime_r(&long_time, &t); |
| jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", |
| t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, |
| t.tm_hour, t.tm_min, t.tm_sec); |
| return buf; |
| } |
| |
| struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { |
| return localtime_r(clock, res); |
| } |
| |
| // Information of current thread in variety of formats |
| pid_t os::Bsd::gettid() { |
| int retval = -1; |
| |
| #ifdef __APPLE__ // XNU kernel |
| mach_port_t port = mach_thread_self(); |
| guarantee(MACH_PORT_VALID(port), "just checking"); |
| mach_port_deallocate(mach_task_self(), port); |
| return (pid_t)port; |
| |
| #else |
| #ifdef __FreeBSD__ |
| retval = syscall(SYS_thr_self); |
| #else |
| #ifdef __OpenBSD__ |
| retval = syscall(SYS_getthrid); |
| #else |
| #ifdef __NetBSD__ |
| retval = (pid_t) syscall(SYS__lwp_self); |
| #endif |
| #endif |
| #endif |
| #endif |
| |
| if (retval == -1) { |
| return getpid(); |
| } |
| } |
| |
| intx os::current_thread_id() { |
| #ifdef __APPLE__ |
| return (intx)os::Bsd::gettid(); |
| #else |
| return (intx)::pthread_self(); |
| #endif |
| } |
| |
| int os::current_process_id() { |
| return (int)(getpid()); |
| } |
| |
| // DLL functions |
| |
| const char* os::dll_file_extension() { return JNI_LIB_SUFFIX; } |
| |
| static int local_dladdr(const void* addr, Dl_info* info) { |
| #ifdef __APPLE__ |
| if (addr == (void*)-1) { |
| // dladdr() in macOS12/Monterey returns success for -1, but that addr |
| // value should not be allowed to work to avoid confusion. |
| return 0; |
| } |
| #endif |
| return dladdr(addr, info); |
| } |
| |
| // This must be hard coded because it's the system's temporary |
| // directory not the java application's temp directory, ala java.io.tmpdir. |
| #ifdef __APPLE__ |
| // macosx has a secure per-user temporary directory |
| char temp_path_storage[PATH_MAX]; |
| const char* os::get_temp_directory() { |
| static char *temp_path = NULL; |
| if (temp_path == NULL) { |
| int pathSize = confstr(_CS_DARWIN_USER_TEMP_DIR, temp_path_storage, PATH_MAX); |
| if (pathSize == 0 || pathSize > PATH_MAX) { |
| strlcpy(temp_path_storage, "/tmp/", sizeof(temp_path_storage)); |
| } |
| temp_path = temp_path_storage; |
| } |
| return temp_path; |
| } |
| #else // __APPLE__ |
| const char* os::get_temp_directory() { return "/tmp"; } |
| #endif // __APPLE__ |
| |
| // check if addr is inside libjvm.so |
| bool os::address_is_in_vm(address addr) { |
| static address libjvm_base_addr; |
| Dl_info dlinfo; |
| |
| if (libjvm_base_addr == NULL) { |
| if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) { |
| libjvm_base_addr = (address)dlinfo.dli_fbase; |
| } |
| assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); |
| } |
| |
| if (dladdr((void *)addr, &dlinfo) != 0) { |
| if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; |
| } |
| |
| return false; |
| } |
| |
| bool os::dll_address_to_function_name(address addr, char *buf, |
| int buflen, int *offset, |
| bool demangle) { |
| // buf is not optional, but offset is optional |
| assert(buf != NULL, "sanity check"); |
| |
| Dl_info dlinfo; |
| |
| if (local_dladdr((void*)addr, &dlinfo) != 0) { |
| // see if we have a matching symbol |
| if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) { |
| if (!(demangle && Decoder::demangle(dlinfo.dli_sname, buf, buflen))) { |
| jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); |
| } |
| if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; |
| return true; |
| } |
| |
| #ifndef __APPLE__ |
| // The 6-parameter Decoder::decode() function is not implemented on macOS. |
| // The Mach-O binary format does not contain a "list of files" with address |
| // ranges like ELF. That makes sense since Mach-O can contain binaries for |
| // than one instruction set so there can be more than one address range for |
| // each "file". |
| |
| // no matching symbol so try for just file info |
| if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { |
| if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), |
| buf, buflen, offset, dlinfo.dli_fname, demangle)) { |
| return true; |
| } |
| } |
| |
| #else // __APPLE__ |
| #define MACH_MAXSYMLEN 256 |
| |
| char localbuf[MACH_MAXSYMLEN]; |
| // Handle non-dynamic manually: |
| if (dlinfo.dli_fbase != NULL && |
| Decoder::decode(addr, localbuf, MACH_MAXSYMLEN, offset, |
| dlinfo.dli_fbase)) { |
| if (!(demangle && Decoder::demangle(localbuf, buf, buflen))) { |
| jio_snprintf(buf, buflen, "%s", localbuf); |
| } |
| return true; |
| } |
| |
| #undef MACH_MAXSYMLEN |
| #endif // __APPLE__ |
| } |
| buf[0] = '\0'; |
| if (offset != NULL) *offset = -1; |
| return false; |
| } |
| |
| // ported from solaris version |
| bool os::dll_address_to_library_name(address addr, char* buf, |
| int buflen, int* offset) { |
| // buf is not optional, but offset is optional |
| assert(buf != NULL, "sanity check"); |
| |
| Dl_info dlinfo; |
| |
| if (local_dladdr((void*)addr, &dlinfo) != 0) { |
| if (dlinfo.dli_fname != NULL) { |
| jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); |
| } |
| if (dlinfo.dli_fbase != NULL && offset != NULL) { |
| *offset = addr - (address)dlinfo.dli_fbase; |
| } |
| return true; |
| } |
| |
| buf[0] = '\0'; |
| if (offset) *offset = -1; |
| return false; |
| } |
| |
| // Loads .dll/.so and |
| // in case of error it checks if .dll/.so was built for the |
| // same architecture as Hotspot is running on |
| |
| #ifdef __APPLE__ |
| void * os::dll_load(const char *filename, char *ebuf, int ebuflen) { |
| #ifdef STATIC_BUILD |
| return os::get_default_process_handle(); |
| #else |
| log_info(os)("attempting shared library load of %s", filename); |
| |
| void * result= ::dlopen(filename, RTLD_LAZY); |
| if (result != NULL) { |
| Events::log_dll_message(NULL, "Loaded shared library %s", filename); |
| // Successful loading |
| log_info(os)("shared library load of %s was successful", filename); |
| return result; |
| } |
| |
| const char* error_report = ::dlerror(); |
| if (error_report == NULL) { |
| error_report = "dlerror returned no error description"; |
| } |
| if (ebuf != NULL && ebuflen > 0) { |
| // Read system error message into ebuf |
| ::strncpy(ebuf, error_report, ebuflen-1); |
| ebuf[ebuflen-1]='\0'; |
| } |
| Events::log_dll_message(NULL, "Loading shared library %s failed, %s", filename, error_report); |
| log_info(os)("shared library load of %s failed, %s", filename, error_report); |
| |
| return NULL; |
| #endif // STATIC_BUILD |
| } |
| #else |
| void * os::dll_load(const char *filename, char *ebuf, int ebuflen) { |
| #ifdef STATIC_BUILD |
| return os::get_default_process_handle(); |
| #else |
| log_info(os)("attempting shared library load of %s", filename); |
| void * result= ::dlopen(filename, RTLD_LAZY); |
| if (result != NULL) { |
| Events::log_dll_message(NULL, "Loaded shared library %s", filename); |
| // Successful loading |
| log_info(os)("shared library load of %s was successful", filename); |
| return result; |
| } |
| |
| Elf32_Ehdr elf_head; |
| |
| const char* const error_report = ::dlerror(); |
| if (error_report == NULL) { |
| error_report = "dlerror returned no error description"; |
| } |
| if (ebuf != NULL && ebuflen > 0) { |
| // Read system error message into ebuf |
| ::strncpy(ebuf, error_report, ebuflen-1); |
| ebuf[ebuflen-1]='\0'; |
| } |
| Events::log_dll_message(NULL, "Loading shared library %s failed, %s", filename, error_report); |
| log_info(os)("shared library load of %s failed, %s", filename, error_report); |
| |
| int diag_msg_max_length=ebuflen-strlen(ebuf); |
| char* diag_msg_buf=ebuf+strlen(ebuf); |
| |
| if (diag_msg_max_length==0) { |
| // No more space in ebuf for additional diagnostics message |
| return NULL; |
| } |
| |
| |
| int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); |
| |
| if (file_descriptor < 0) { |
| // Can't open library, report dlerror() message |
| return NULL; |
| } |
| |
| bool failed_to_read_elf_head= |
| (sizeof(elf_head)!= |
| (::read(file_descriptor, &elf_head,sizeof(elf_head)))); |
| |
| ::close(file_descriptor); |
| if (failed_to_read_elf_head) { |
| // file i/o error - report dlerror() msg |
| return NULL; |
| } |
| |
| typedef struct { |
| Elf32_Half code; // Actual value as defined in elf.h |
| Elf32_Half compat_class; // Compatibility of archs at VM's sense |
| char elf_class; // 32 or 64 bit |
| char endianess; // MSB or LSB |
| char* name; // String representation |
| } arch_t; |
| |
| #ifndef EM_486 |
| #define EM_486 6 /* Intel 80486 */ |
| #endif |
| |
| #ifndef EM_MIPS_RS3_LE |
| #define EM_MIPS_RS3_LE 10 /* MIPS */ |
| #endif |
| |
| #ifndef EM_PPC64 |
| #define EM_PPC64 21 /* PowerPC64 */ |
| #endif |
| |
| #ifndef EM_S390 |
| #define EM_S390 22 /* IBM System/390 */ |
| #endif |
| |
| #ifndef EM_IA_64 |
| #define EM_IA_64 50 /* HP/Intel IA-64 */ |
| #endif |
| |
| #ifndef EM_X86_64 |
| #define EM_X86_64 62 /* AMD x86-64 */ |
| #endif |
| |
| static const arch_t arch_array[]={ |
| {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, |
| {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, |
| {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, |
| {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, |
| {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, |
| {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, |
| {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM"}, |
| {EM_S390, EM_S390, ELFCLASSNONE, ELFDATA2MSB, (char*)"IBM System/390"}, |
| {EM_ALPHA, EM_ALPHA, ELFCLASS64, ELFDATA2LSB, (char*)"Alpha"}, |
| {EM_MIPS_RS3_LE, EM_MIPS_RS3_LE, ELFCLASS32, ELFDATA2LSB, (char*)"MIPSel"}, |
| {EM_MIPS, EM_MIPS, ELFCLASS32, ELFDATA2MSB, (char*)"MIPS"}, |
| {EM_PARISC, EM_PARISC, ELFCLASS32, ELFDATA2MSB, (char*)"PARISC"}, |
| {EM_68K, EM_68K, ELFCLASS32, ELFDATA2MSB, (char*)"M68k"} |
| }; |
| |
| #if (defined IA32) |
| static Elf32_Half running_arch_code=EM_386; |
| #elif (defined AMD64) |
| static Elf32_Half running_arch_code=EM_X86_64; |
| #elif (defined IA64) |
| static Elf32_Half running_arch_code=EM_IA_64; |
| #elif (defined __powerpc64__) |
| static Elf32_Half running_arch_code=EM_PPC64; |
| #elif (defined __powerpc__) |
| static Elf32_Half running_arch_code=EM_PPC; |
| #elif (defined ARM) |
| static Elf32_Half running_arch_code=EM_ARM; |
| #elif (defined S390) |
| static Elf32_Half running_arch_code=EM_S390; |
| #elif (defined ALPHA) |
| static Elf32_Half running_arch_code=EM_ALPHA; |
| #elif (defined MIPSEL) |
| static Elf32_Half running_arch_code=EM_MIPS_RS3_LE; |
| #elif (defined PARISC) |
| static Elf32_Half running_arch_code=EM_PARISC; |
| #elif (defined MIPS) |
| static Elf32_Half running_arch_code=EM_MIPS; |
| #elif (defined M68K) |
| static Elf32_Half running_arch_code=EM_68K; |
| #else |
| #error Method os::dll_load requires that one of following is defined:\ |
| IA32, AMD64, IA64, __powerpc__, ARM, S390, ALPHA, MIPS, MIPSEL, PARISC, M68K |
| #endif |
| |
| // Identify compatability class for VM's architecture and library's architecture |
| // Obtain string descriptions for architectures |
| |
| arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; |
| int running_arch_index=-1; |
| |
| for (unsigned int i=0; i < ARRAY_SIZE(arch_array); i++) { |
| if (running_arch_code == arch_array[i].code) { |
| running_arch_index = i; |
| } |
| if (lib_arch.code == arch_array[i].code) { |
| lib_arch.compat_class = arch_array[i].compat_class; |
| lib_arch.name = arch_array[i].name; |
| } |
| } |
| |
| assert(running_arch_index != -1, |
| "Didn't find running architecture code (running_arch_code) in arch_array"); |
| if (running_arch_index == -1) { |
| // Even though running architecture detection failed |
| // we may still continue with reporting dlerror() message |
| return NULL; |
| } |
| |
| if (lib_arch.endianess != arch_array[running_arch_index].endianess) { |
| ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); |
| return NULL; |
| } |
| |
| #ifndef S390 |
| if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { |
| ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); |
| return NULL; |
| } |
| #endif // !S390 |
| |
| if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { |
| if (lib_arch.name!=NULL) { |
| ::snprintf(diag_msg_buf, diag_msg_max_length-1, |
| " (Possible cause: can't load %s-bit .so on a %s-bit platform)", |
| lib_arch.name, arch_array[running_arch_index].name); |
| } else { |
| ::snprintf(diag_msg_buf, diag_msg_max_length-1, |
| " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", |
| lib_arch.code, |
| arch_array[running_arch_index].name); |
| } |
| } |
| |
| return NULL; |
| #endif // STATIC_BUILD |
| } |
| #endif // !__APPLE__ |
| |
| int _print_dll_info_cb(const char * name, address base_address, address top_address, void * param) { |
| outputStream * out = (outputStream *) param; |
| out->print_cr(INTPTR_FORMAT " \t%s", (intptr_t)base_address, name); |
| return 0; |
| } |
| |
| void os::print_dll_info(outputStream *st) { |
| st->print_cr("Dynamic libraries:"); |
| if (get_loaded_modules_info(_print_dll_info_cb, (void *)st)) { |
| st->print_cr("Error: Cannot print dynamic libraries."); |
| } |
| } |
| |
| int os::get_loaded_modules_info(os::LoadedModulesCallbackFunc callback, void *param) { |
| #ifdef RTLD_DI_LINKMAP |
| Dl_info dli; |
| void *handle; |
| Link_map *map; |
| Link_map *p; |
| |
| if (dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli) == 0 || |
| dli.dli_fname == NULL) { |
| return 1; |
| } |
| handle = dlopen(dli.dli_fname, RTLD_LAZY); |
| if (handle == NULL) { |
| return 1; |
| } |
| dlinfo(handle, RTLD_DI_LINKMAP, &map); |
| if (map == NULL) { |
| dlclose(handle); |
| return 1; |
| } |
| |
| while (map->l_prev != NULL) |
| map = map->l_prev; |
| |
| while (map != NULL) { |
| // Value for top_address is returned as 0 since we don't have any information about module size |
| if (callback(map->l_name, (address)map->l_addr, (address)0, param)) { |
| dlclose(handle); |
| return 1; |
| } |
| map = map->l_next; |
| } |
| |
| dlclose(handle); |
| #elif defined(__APPLE__) |
| for (uint32_t i = 1; i < _dyld_image_count(); i++) { |
| // Value for top_address is returned as 0 since we don't have any information about module size |
| if (callback(_dyld_get_image_name(i), (address)_dyld_get_image_header(i), (address)0, param)) { |
| return 1; |
| } |
| } |
| return 0; |
| #else |
| return 1; |
| #endif |
| } |
| |
| void os::get_summary_os_info(char* buf, size_t buflen) { |
| // These buffers are small because we want this to be brief |
| // and not use a lot of stack while generating the hs_err file. |
| char os[100]; |
| size_t size = sizeof(os); |
| int mib_kern[] = { CTL_KERN, KERN_OSTYPE }; |
| if (sysctl(mib_kern, 2, os, &size, NULL, 0) < 0) { |
| #ifdef __APPLE__ |
| strncpy(os, "Darwin", sizeof(os)); |
| #elif __OpenBSD__ |
| strncpy(os, "OpenBSD", sizeof(os)); |
| #else |
| strncpy(os, "BSD", sizeof(os)); |
| #endif |
| } |
| |
| char release[100]; |
| size = sizeof(release); |
| int mib_release[] = { CTL_KERN, KERN_OSRELEASE }; |
| if (sysctl(mib_release, 2, release, &size, NULL, 0) < 0) { |
| // if error, leave blank |
| strncpy(release, "", sizeof(release)); |
| } |
| |
| #ifdef __APPLE__ |
| char osproductversion[100]; |
| size_t sz = sizeof(osproductversion); |
| int ret = sysctlbyname("kern.osproductversion", osproductversion, &sz, NULL, 0); |
| if (ret == 0) { |
| char build[100]; |
| size = sizeof(build); |
| int mib_build[] = { CTL_KERN, KERN_OSVERSION }; |
| if (sysctl(mib_build, 2, build, &size, NULL, 0) < 0) { |
| snprintf(buf, buflen, "%s %s, macOS %s", os, release, osproductversion); |
| } else { |
| snprintf(buf, buflen, "%s %s, macOS %s (%s)", os, release, osproductversion, build); |
| } |
| } else |
| #endif |
| snprintf(buf, buflen, "%s %s", os, release); |
| } |
| |
| void os::print_os_info_brief(outputStream* st) { |
| os::Posix::print_uname_info(st); |
| } |
| |
| void os::print_os_info(outputStream* st) { |
| st->print_cr("OS:"); |
| |
| os::Posix::print_uname_info(st); |
| |
| os::Bsd::print_uptime_info(st); |
| |
| os::Posix::print_rlimit_info(st); |
| |
| os::Posix::print_load_average(st); |
| |
| VM_Version::print_platform_virtualization_info(st); |
| } |
| |
| void os::pd_print_cpu_info(outputStream* st, char* buf, size_t buflen) { |
| // Nothing to do for now. |
| } |
| |
| void os::get_summary_cpu_info(char* buf, size_t buflen) { |
| unsigned int mhz; |
| size_t size = sizeof(mhz); |
| int mib[] = { CTL_HW, HW_CPU_FREQ }; |
| if (sysctl(mib, 2, &mhz, &size, NULL, 0) < 0) { |
| mhz = 1; // looks like an error but can be divided by |
| } else { |
| mhz /= 1000000; // reported in millions |
| } |
| |
| char model[100]; |
| size = sizeof(model); |
| int mib_model[] = { CTL_HW, HW_MODEL }; |
| if (sysctl(mib_model, 2, model, &size, NULL, 0) < 0) { |
| strncpy(model, cpu_arch, sizeof(model)); |
| } |
| |
| char machine[100]; |
| size = sizeof(machine); |
| int mib_machine[] = { CTL_HW, HW_MACHINE }; |
| if (sysctl(mib_machine, 2, machine, &size, NULL, 0) < 0) { |
| strncpy(machine, "", sizeof(machine)); |
| } |
| |
| #if defined(__APPLE__) && !defined(ZERO) |
| if (VM_Version::is_cpu_emulated()) { |
| snprintf(buf, buflen, "\"%s\" %s (EMULATED) %d MHz", model, machine, mhz); |
| } else { |
| NOT_AARCH64(snprintf(buf, buflen, "\"%s\" %s %d MHz", model, machine, mhz)); |
| // aarch64 CPU doesn't report its speed |
| AARCH64_ONLY(snprintf(buf, buflen, "\"%s\" %s", model, machine)); |
| } |
| #else |
| snprintf(buf, buflen, "\"%s\" %s %d MHz", model, machine, mhz); |
| #endif |
| } |
| |
| void os::print_memory_info(outputStream* st) { |
| xsw_usage swap_usage; |
| size_t size = sizeof(swap_usage); |
| |
| st->print("Memory:"); |
| st->print(" %dk page", os::vm_page_size()>>10); |
| |
| st->print(", physical " UINT64_FORMAT "k", |
| os::physical_memory() >> 10); |
| st->print("(" UINT64_FORMAT "k free)", |
| os::available_memory() >> 10); |
| |
| if((sysctlbyname("vm.swapusage", &swap_usage, &size, NULL, 0) == 0) || (errno == ENOMEM)) { |
| if (size >= offset_of(xsw_usage, xsu_used)) { |
| st->print(", swap " UINT64_FORMAT "k", |
| ((julong) swap_usage.xsu_total) >> 10); |
| st->print("(" UINT64_FORMAT "k free)", |
| ((julong) swap_usage.xsu_avail) >> 10); |
| } |
| } |
| |
| st->cr(); |
| } |
| |
| static char saved_jvm_path[MAXPATHLEN] = {0}; |
| |
| // Find the full path to the current module, libjvm |
| void os::jvm_path(char *buf, jint buflen) { |
| // Error checking. |
| if (buflen < MAXPATHLEN) { |
| assert(false, "must use a large-enough buffer"); |
| buf[0] = '\0'; |
| return; |
| } |
| // Lazy resolve the path to current module. |
| if (saved_jvm_path[0] != 0) { |
| strcpy(buf, saved_jvm_path); |
| return; |
| } |
| |
| char dli_fname[MAXPATHLEN]; |
| dli_fname[0] = '\0'; |
| bool ret = dll_address_to_library_name( |
| CAST_FROM_FN_PTR(address, os::jvm_path), |
| dli_fname, sizeof(dli_fname), NULL); |
| assert(ret, "cannot locate libjvm"); |
| char *rp = NULL; |
| if (ret && dli_fname[0] != '\0') { |
| rp = os::Posix::realpath(dli_fname, buf, buflen); |
| } |
| if (rp == NULL) { |
| return; |
| } |
| |
| if (Arguments::sun_java_launcher_is_altjvm()) { |
| // Support for the java launcher's '-XXaltjvm=<path>' option. Typical |
| // value for buf is "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so" |
| // or "<JAVA_HOME>/jre/lib/<vmtype>/libjvm.dylib". If "/jre/lib/" |
| // appears at the right place in the string, then assume we are |
| // installed in a JDK and we're done. Otherwise, check for a |
| // JAVA_HOME environment variable and construct a path to the JVM |
| // being overridden. |
| |
| const char *p = buf + strlen(buf) - 1; |
| for (int count = 0; p > buf && count < 5; ++count) { |
| for (--p; p > buf && *p != '/'; --p) |
| /* empty */ ; |
| } |
| |
| if (strncmp(p, "/jre/lib/", 9) != 0) { |
| // Look for JAVA_HOME in the environment. |
| char* java_home_var = ::getenv("JAVA_HOME"); |
| if (java_home_var != NULL && java_home_var[0] != 0) { |
| char* jrelib_p; |
| int len; |
| |
| // Check the current module name "libjvm" |
| p = strrchr(buf, '/'); |
| assert(strstr(p, "/libjvm") == p, "invalid library name"); |
| |
| rp = os::Posix::realpath(java_home_var, buf, buflen); |
| if (rp == NULL) { |
| return; |
| } |
| |
| // determine if this is a legacy image or modules image |
| // modules image doesn't have "jre" subdirectory |
| len = strlen(buf); |
| assert(len < buflen, "Ran out of buffer space"); |
| jrelib_p = buf + len; |
| |
| // Add the appropriate library subdir |
| snprintf(jrelib_p, buflen-len, "/jre/lib"); |
| if (0 != access(buf, F_OK)) { |
| snprintf(jrelib_p, buflen-len, "/lib"); |
| } |
| |
| // Add the appropriate client or server subdir |
| len = strlen(buf); |
| jrelib_p = buf + len; |
| snprintf(jrelib_p, buflen-len, "/%s", COMPILER_VARIANT); |
| if (0 != access(buf, F_OK)) { |
| snprintf(jrelib_p, buflen-len, "%s", ""); |
| } |
| |
| // If the path exists within JAVA_HOME, add the JVM library name |
| // to complete the path to JVM being overridden. Otherwise fallback |
| // to the path to the current library. |
| if (0 == access(buf, F_OK)) { |
| // Use current module name "libjvm" |
| len = strlen(buf); |
| snprintf(buf + len, buflen-len, "/libjvm%s", JNI_LIB_SUFFIX); |
| } else { |
| // Fall back to path of current library |
| rp = os::Posix::realpath(dli_fname, buf, buflen); |
| if (rp == NULL) { |
| return; |
| } |
| } |
| } |
| } |
| } |
| |
| strncpy(saved_jvm_path, buf, MAXPATHLEN); |
| saved_jvm_path[MAXPATHLEN - 1] = '\0'; |
| } |
| |
| void os::print_jni_name_prefix_on(outputStream* st, int args_size) { |
| // no prefix required, not even "_" |
| } |
| |
| void os::print_jni_name_suffix_on(outputStream* st, int args_size) { |
| // no suffix required |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // Virtual Memory |
| |
| int os::vm_page_size() { |
| // Seems redundant as all get out |
| assert(os::Bsd::page_size() != -1, "must call os::init"); |
| return os::Bsd::page_size(); |
| } |
| |
| // Solaris allocates memory by pages. |
| int os::vm_allocation_granularity() { |
| assert(os::Bsd::page_size() != -1, "must call os::init"); |
| return os::Bsd::page_size(); |
| } |
| |
| static void warn_fail_commit_memory(char* addr, size_t size, bool exec, |
| int err) { |
| warning("INFO: os::commit_memory(" INTPTR_FORMAT ", " SIZE_FORMAT |
| ", %d) failed; error='%s' (errno=%d)", (intptr_t)addr, size, exec, |
| os::errno_name(err), err); |
| } |
| |
| // NOTE: Bsd kernel does not really reserve the pages for us. |
| // All it does is to check if there are enough free pages |
| // left at the time of mmap(). This could be a potential |
| // problem. |
| bool os::pd_commit_memory(char* addr, size_t size, bool exec) { |
| int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; |
| #if defined(__OpenBSD__) |
| // XXX: Work-around mmap/MAP_FIXED bug temporarily on OpenBSD |
| Events::log(NULL, "Protecting memory [" INTPTR_FORMAT "," INTPTR_FORMAT "] with protection modes %x", p2i(addr), p2i(addr+size), prot); |
| if (::mprotect(addr, size, prot) == 0) { |
| return true; |
| } |
| #elif defined(__APPLE__) |
| if (exec) { |
| // Do not replace MAP_JIT mappings, see JDK-8234930 |
| if (::mprotect(addr, size, prot) == 0) { |
| return true; |
| } |
| } else { |
| uintptr_t res = (uintptr_t) ::mmap(addr, size, prot, |
| MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0); |
| if (res != (uintptr_t) MAP_FAILED) { |
| return true; |
| } |
| } |
| #else |
| uintptr_t res = (uintptr_t) ::mmap(addr, size, prot, |
| MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0); |
| if (res != (uintptr_t) MAP_FAILED) { |
| return true; |
| } |
| #endif |
| |
| // Warn about any commit errors we see in non-product builds just |
| // in case mmap() doesn't work as described on the man page. |
| NOT_PRODUCT(warn_fail_commit_memory(addr, size, exec, errno);) |
| |
| return false; |
| } |
| |
| bool os::pd_commit_memory(char* addr, size_t size, size_t alignment_hint, |
| bool exec) { |
| // alignment_hint is ignored on this OS |
| return pd_commit_memory(addr, size, exec); |
| } |
| |
| void os::pd_commit_memory_or_exit(char* addr, size_t size, bool exec, |
| const char* mesg) { |
| assert(mesg != NULL, "mesg must be specified"); |
| if (!pd_commit_memory(addr, size, exec)) { |
| // add extra info in product mode for vm_exit_out_of_memory(): |
| PRODUCT_ONLY(warn_fail_commit_memory(addr, size, exec, errno);) |
| vm_exit_out_of_memory(size, OOM_MMAP_ERROR, "%s", mesg); |
| } |
| } |
| |
| void os::pd_commit_memory_or_exit(char* addr, size_t size, |
| size_t alignment_hint, bool exec, |
| const char* mesg) { |
| // alignment_hint is ignored on this OS |
| pd_commit_memory_or_exit(addr, size, exec, mesg); |
| } |
| |
| void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { |
| } |
| |
| void os::pd_free_memory(char *addr, size_t bytes, size_t alignment_hint) { |
| ::madvise(addr, bytes, MADV_DONTNEED); |
| } |
| |
| void os::numa_make_global(char *addr, size_t bytes) { |
| } |
| |
| void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { |
| } |
| |
| bool os::numa_topology_changed() { return false; } |
| |
| size_t os::numa_get_groups_num() { |
| return 1; |
| } |
| |
| int os::numa_get_group_id() { |
| return 0; |
| } |
| |
| size_t os::numa_get_leaf_groups(int *ids, size_t size) { |
| if (size > 0) { |
| ids[0] = 0; |
| return 1; |
| } |
| return 0; |
| } |
| |
| int os::numa_get_group_id_for_address(const void* address) { |
| return 0; |
| } |
| |
| bool os::get_page_info(char *start, page_info* info) { |
| return false; |
| } |
| |
| char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { |
| return end; |
| } |
| |
| |
| bool os::pd_uncommit_memory(char* addr, size_t size, bool exec) { |
| #if defined(__OpenBSD__) |
| // XXX: Work-around mmap/MAP_FIXED bug temporarily on OpenBSD |
| Events::log(NULL, "Protecting memory [" INTPTR_FORMAT "," INTPTR_FORMAT "] with PROT_NONE", p2i(addr), p2i(addr+size)); |
| return ::mprotect(addr, size, PROT_NONE) == 0; |
| #elif defined(__APPLE__) |
| if (exec) { |
| if (::madvise(addr, size, MADV_FREE) != 0) { |
| return false; |
| } |
| return ::mprotect(addr, size, PROT_NONE) == 0; |
| } else { |
| uintptr_t res = (uintptr_t) ::mmap(addr, size, PROT_NONE, |
| MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE|MAP_ANONYMOUS, -1, 0); |
| return res != (uintptr_t) MAP_FAILED; |
| } |
| #else |
| uintptr_t res = (uintptr_t) ::mmap(addr, size, PROT_NONE, |
| MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE|MAP_ANONYMOUS, -1, 0); |
| return res != (uintptr_t) MAP_FAILED; |
| #endif |
| } |
| |
| bool os::pd_create_stack_guard_pages(char* addr, size_t size) { |
| return os::commit_memory(addr, size, !ExecMem); |
| } |
| |
| // If this is a growable mapping, remove the guard pages entirely by |
| // munmap()ping them. If not, just call uncommit_memory(). |
| bool os::remove_stack_guard_pages(char* addr, size_t size) { |
| return os::uncommit_memory(addr, size); |
| } |
| |
| // 'requested_addr' is only treated as a hint, the return value may or |
| // may not start from the requested address. Unlike Bsd mmap(), this |
| // function returns NULL to indicate failure. |
| static char* anon_mmap(char* requested_addr, size_t bytes, bool exec) { |
| // MAP_FIXED is intentionally left out, to leave existing mappings intact. |
| const int flags = MAP_PRIVATE | MAP_NORESERVE | MAP_ANONYMOUS |
| MACOS_ONLY(| (exec ? MAP_JIT : 0)); |
| |
| // Map reserved/uncommitted pages PROT_NONE so we fail early if we |
| // touch an uncommitted page. Otherwise, the read/write might |
| // succeed if we have enough swap space to back the physical page. |
| char* addr = (char*)::mmap(requested_addr, bytes, PROT_NONE, flags, -1, 0); |
| |
| return addr == MAP_FAILED ? NULL : addr; |
| } |
| |
| static int anon_munmap(char * addr, size_t size) { |
| return ::munmap(addr, size) == 0; |
| } |
| |
| char* os::pd_reserve_memory(size_t bytes, bool exec) { |
| return anon_mmap(NULL /* addr */, bytes, exec); |
| } |
| |
| bool os::pd_release_memory(char* addr, size_t size) { |
| return anon_munmap(addr, size); |
| } |
| |
| static bool bsd_mprotect(char* addr, size_t size, int prot) { |
| // Bsd wants the mprotect address argument to be page aligned. |
| char* bottom = (char*)align_down((intptr_t)addr, os::Bsd::page_size()); |
| |
| // According to SUSv3, mprotect() should only be used with mappings |
| // established by mmap(), and mmap() always maps whole pages. Unaligned |
| // 'addr' likely indicates problem in the VM (e.g. trying to change |
| // protection of malloc'ed or statically allocated memory). Check the |
| // caller if you hit this assert. |
| assert(addr == bottom, "sanity check"); |
| |
| size = align_up(pointer_delta(addr, bottom, 1) + size, os::Bsd::page_size()); |
| Events::log(NULL, "Protecting memory [" INTPTR_FORMAT "," INTPTR_FORMAT "] with protection modes %x", p2i(bottom), p2i(bottom+size), prot); |
| return ::mprotect(bottom, size, prot) == 0; |
| } |
| |
| // Set protections specified |
| bool os::protect_memory(char* addr, size_t bytes, ProtType prot, |
| bool is_committed) { |
| unsigned int p = 0; |
| switch (prot) { |
| case MEM_PROT_NONE: p = PROT_NONE; break; |
| case MEM_PROT_READ: p = PROT_READ; break; |
| case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; |
| case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; |
| default: |
| ShouldNotReachHere(); |
| } |
| // is_committed is unused. |
| return bsd_mprotect(addr, bytes, p); |
| } |
| |
| bool os::guard_memory(char* addr, size_t size) { |
| return bsd_mprotect(addr, size, PROT_NONE); |
| } |
| |
| bool os::unguard_memory(char* addr, size_t size) { |
| return bsd_mprotect(addr, size, PROT_READ|PROT_WRITE); |
| } |
| |
| bool os::Bsd::hugetlbfs_sanity_check(bool warn, size_t page_size) { |
| return false; |
| } |
| |
| // Large page support |
| |
| static size_t _large_page_size = 0; |
| |
| void os::large_page_init() { |
| } |
| |
| |
| char* os::pd_reserve_memory_special(size_t bytes, size_t alignment, size_t page_size, char* req_addr, bool exec) { |
| fatal("os::reserve_memory_special should not be called on BSD."); |
| return NULL; |
| } |
| |
| bool os::pd_release_memory_special(char* base, size_t bytes) { |
| fatal("os::release_memory_special should not be called on BSD."); |
| return false; |
| } |
| |
| size_t os::large_page_size() { |
| return _large_page_size; |
| } |
| |
| bool os::can_commit_large_page_memory() { |
| // Does not matter, we do not support huge pages. |
| return false; |
| } |
| |
| bool os::can_execute_large_page_memory() { |
| // Does not matter, we do not support huge pages. |
| return false; |
| } |
| |
| char* os::pd_attempt_map_memory_to_file_at(char* requested_addr, size_t bytes, int file_desc) { |
| assert(file_desc >= 0, "file_desc is not valid"); |
| char* result = pd_attempt_reserve_memory_at(requested_addr, bytes, !ExecMem); |
| if (result != NULL) { |
| if (replace_existing_mapping_with_file_mapping(result, bytes, file_desc) == NULL) { |
| vm_exit_during_initialization(err_msg("Error in mapping Java heap at the given filesystem directory")); |
| } |
| } |
| return result; |
| } |
| |
| // Reserve memory at an arbitrary address, only if that area is |
| // available (and not reserved for something else). |
| |
| char* os::pd_attempt_reserve_memory_at(char* requested_addr, size_t bytes, bool exec) { |
| // Assert only that the size is a multiple of the page size, since |
| // that's all that mmap requires, and since that's all we really know |
| // about at this low abstraction level. If we need higher alignment, |
| // we can either pass an alignment to this method or verify alignment |
| // in one of the methods further up the call chain. See bug 5044738. |
| assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); |
| |
| // Repeatedly allocate blocks until the block is allocated at the |
| // right spot. |
| |
| // Bsd mmap allows caller to pass an address as hint; give it a try first, |
| // if kernel honors the hint then we can return immediately. |
| char * addr = anon_mmap(requested_addr, bytes, exec); |
| if (addr == requested_addr) { |
| return requested_addr; |
| } |
| |
| if (addr != NULL) { |
| // mmap() is successful but it fails to reserve at the requested address |
| anon_munmap(addr, bytes); |
| } |
| |
| return NULL; |
| } |
| |
| // Used to convert frequent JVM_Yield() to nops |
| bool os::dont_yield() { |
| return DontYieldALot; |
| } |
| |
| void os::naked_yield() { |
| sched_yield(); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // thread priority support |
| |
| // Note: Normal Bsd applications are run with SCHED_OTHER policy. SCHED_OTHER |
| // only supports dynamic priority, static priority must be zero. For real-time |
| // applications, Bsd supports SCHED_RR which allows static priority (1-99). |
| // However, for large multi-threaded applications, SCHED_RR is not only slower |
| // than SCHED_OTHER, but also very unstable (my volano tests hang hard 4 out |
| // of 5 runs - Sep 2005). |
| // |
| // The following code actually changes the niceness of kernel-thread/LWP. It |
| // has an assumption that setpriority() only modifies one kernel-thread/LWP, |
| // not the entire user process, and user level threads are 1:1 mapped to kernel |
| // threads. It has always been the case, but could change in the future. For |
| // this reason, the code should not be used as default (ThreadPriorityPolicy=0). |
| // It is only used when ThreadPriorityPolicy=1 and may require system level permission |
| // (e.g., root privilege or CAP_SYS_NICE capability). |
| |
| #if !defined(__APPLE__) |
| int os::java_to_os_priority[CriticalPriority + 1] = { |
| 19, // 0 Entry should never be used |
| |
| 0, // 1 MinPriority |
| 3, // 2 |
| 6, // 3 |
| |
| 10, // 4 |
| 15, // 5 NormPriority |
| 18, // 6 |
| |
| 21, // 7 |
| 25, // 8 |
| 28, // 9 NearMaxPriority |
| |
| 31, // 10 MaxPriority |
| |
| 31 // 11 CriticalPriority |
| }; |
| #else |
| // Using Mach high-level priority assignments |
| int os::java_to_os_priority[CriticalPriority + 1] = { |
| 0, // 0 Entry should never be used (MINPRI_USER) |
| |
| 27, // 1 MinPriority |
| 28, // 2 |
| 29, // 3 |
| |
| 30, // 4 |
| 31, // 5 NormPriority (BASEPRI_DEFAULT) |
| 32, // 6 |
| |
| 33, // 7 |
| 34, // 8 |
| 35, // 9 NearMaxPriority |
| |
| 36, // 10 MaxPriority |
| |
| 36 // 11 CriticalPriority |
| }; |
| #endif |
| |
| static int prio_init() { |
| if (ThreadPriorityPolicy == 1) { |
| if (geteuid() != 0) { |
| if (!FLAG_IS_DEFAULT(ThreadPriorityPolicy) && !FLAG_IS_JIMAGE_RESOURCE(ThreadPriorityPolicy)) { |
| warning("-XX:ThreadPriorityPolicy=1 may require system level permission, " \ |
| "e.g., being the root user. If the necessary permission is not " \ |
| "possessed, changes to priority will be silently ignored."); |
| } |
| } |
| } |
| if (UseCriticalJavaThreadPriority) { |
| os::java_to_os_priority[MaxPriority] = os::java_to_os_priority[CriticalPriority]; |
| } |
| return 0; |
| } |
| |
| OSReturn os::set_native_priority(Thread* thread, int newpri) { |
| if (!UseThreadPriorities || ThreadPriorityPolicy == 0) return OS_OK; |
| |
| #ifdef __OpenBSD__ |
| // OpenBSD pthread_setprio starves low priority threads |
| return OS_OK; |
| #elif defined(__FreeBSD__) |
| int ret = pthread_setprio(thread->osthread()->pthread_id(), newpri); |
| return (ret == 0) ? OS_OK : OS_ERR; |
| #elif defined(__APPLE__) || defined(__NetBSD__) |
| struct sched_param sp; |
| int policy; |
| |
| if (pthread_getschedparam(thread->osthread()->pthread_id(), &policy, &sp) != 0) { |
| return OS_ERR; |
| } |
| |
| sp.sched_priority = newpri; |
| if (pthread_setschedparam(thread->osthread()->pthread_id(), policy, &sp) != 0) { |
| return OS_ERR; |
| } |
| |
| return OS_OK; |
| #else |
| int ret = setpriority(PRIO_PROCESS, thread->osthread()->thread_id(), newpri); |
| return (ret == 0) ? OS_OK : OS_ERR; |
| #endif |
| } |
| |
| OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { |
| if (!UseThreadPriorities || ThreadPriorityPolicy == 0) { |
| *priority_ptr = java_to_os_priority[NormPriority]; |
| return OS_OK; |
| } |
| |
| errno = 0; |
| #if defined(__OpenBSD__) || defined(__FreeBSD__) |
| *priority_ptr = pthread_getprio(thread->osthread()->pthread_id()); |
| #elif defined(__APPLE__) || defined(__NetBSD__) |
| int policy; |
| struct sched_param sp; |
| |
| int res = pthread_getschedparam(thread->osthread()->pthread_id(), &policy, &sp); |
| if (res != 0) { |
| *priority_ptr = -1; |
| return OS_ERR; |
| } else { |
| *priority_ptr = sp.sched_priority; |
| return OS_OK; |
| } |
| #else |
| *priority_ptr = getpriority(PRIO_PROCESS, thread->osthread()->thread_id()); |
| #endif |
| return (*priority_ptr != -1 || errno == 0 ? OS_OK : OS_ERR); |
| } |
| |
| extern void report_error(char* file_name, int line_no, char* title, |
| char* format, ...); |
| |
| // this is called _before_ the most of global arguments have been parsed |
| void os::init(void) { |
| char dummy; // used to get a guess on initial stack address |
| |
| clock_tics_per_sec = CLK_TCK; |
| |
| Bsd::set_page_size(getpagesize()); |
| if (Bsd::page_size() == -1) { |
| fatal("os_bsd.cpp: os::init: sysconf failed (%s)", os::strerror(errno)); |
| } |
| _page_sizes.add(Bsd::page_size()); |
| |
| Bsd::initialize_system_info(); |
| |
| // _main_thread points to the thread that created/loaded the JVM. |
| Bsd::_main_thread = pthread_self(); |
| |
| Bsd::clock_init(); |
| initial_time_count = javaTimeNanos(); |
| |
| os::Posix::init(); |
| } |
| |
| // To install functions for atexit system call |
| extern "C" { |
| static void perfMemory_exit_helper() { |
| perfMemory_exit(); |
| } |
| } |
| |
| // this is called _after_ the global arguments have been parsed |
| jint os::init_2(void) { |
| |
| // This could be set after os::Posix::init() but all platforms |
| // have to set it the same so we have to mirror Solaris. |
| DEBUG_ONLY(os::set_mutex_init_done();) |
| |
| os::Posix::init_2(); |
| |
| if (PosixSignals::init() == JNI_ERR) { |
| return JNI_ERR; |
| } |
| |
| // Check and sets minimum stack sizes against command line options |
| if (Posix::set_minimum_stack_sizes() == JNI_ERR) { |
| return JNI_ERR; |
| } |
| |
| // Not supported. |
| FLAG_SET_ERGO(UseNUMA, false); |
| FLAG_SET_ERGO(UseNUMAInterleaving, false); |
| |
| if (MaxFDLimit) { |
| // set the number of file descriptors to max. print out error |
| // if getrlimit/setrlimit fails but continue regardless. |
| struct rlimit nbr_files; |
| int status = getrlimit(RLIMIT_NOFILE, &nbr_files); |
| if (status != 0) { |
| log_info(os)("os::init_2 getrlimit failed: %s", os::strerror(errno)); |
| } else { |
| nbr_files.rlim_cur = nbr_files.rlim_max; |
| |
| #ifdef __APPLE__ |
| // Darwin returns RLIM_INFINITY for rlim_max, but fails with EINVAL if |
| // you attempt to use RLIM_INFINITY. As per setrlimit(2), OPEN_MAX must |
| // be used instead |
| nbr_files.rlim_cur = MIN(OPEN_MAX, nbr_files.rlim_cur); |
| #endif |
| |
| status = setrlimit(RLIMIT_NOFILE, &nbr_files); |
| if (status != 0) { |
| log_info(os)("os::init_2 setrlimit failed: %s", os::strerror(errno)); |
| } |
| } |
| } |
| |
| // at-exit methods are called in the reverse order of their registration. |
| // atexit functions are called on return from main or as a result of a |
| // call to exit(3C). There can be only 32 of these functions registered |
| // and atexit() does not set errno. |
| |
| if (PerfAllowAtExitRegistration) { |
| // only register atexit functions if PerfAllowAtExitRegistration is set. |
| // atexit functions can be delayed until process exit time, which |
| // can be problematic for embedded VM situations. Embedded VMs should |
| // call DestroyJavaVM() to assure that VM resources are released. |
| |
| // note: perfMemory_exit_helper atexit function may be removed in |
| // the future if the appropriate cleanup code can be added to the |
| // VM_Exit VMOperation's doit method. |
| if (atexit(perfMemory_exit_helper) != 0) { |
| warning("os::init_2 atexit(perfMemory_exit_helper) failed"); |
| } |
| } |
| |
| // initialize thread priority policy |
| prio_init(); |
| |
| #ifdef __APPLE__ |
| // dynamically link to objective c gc registration |
| void *handleLibObjc = dlopen(OBJC_LIB, RTLD_LAZY); |
| if (handleLibObjc != NULL) { |
| objc_registerThreadWithCollectorFunction = (objc_registerThreadWithCollector_t) dlsym(handleLibObjc, OBJC_GCREGISTER); |
| } |
| #endif |
| |
| return JNI_OK; |
| } |
| |
| int os::active_processor_count() { |
| // User has overridden the number of active processors |
| if (ActiveProcessorCount > 0) { |
| log_trace(os)("active_processor_count: " |
| "active processor count set by user : %d", |
| ActiveProcessorCount); |
| return ActiveProcessorCount; |
| } |
| |
| return _processor_count; |
| } |
| |
| uint os::processor_id() { |
| #if defined(__APPLE__) && defined(__x86_64__) |
| // Get the initial APIC id and return the associated processor id. The initial APIC |
| // id is limited to 8-bits, which means we can have at most 256 unique APIC ids. If |
| // the system has more processors (or the initial APIC ids are discontiguous) the |
| // APIC id will be truncated and more than one processor will potentially share the |
| // same processor id. This is not optimal, but unlikely to happen in practice. Should |
| // this become a real problem we could switch to using x2APIC ids, which are 32-bit |
| // wide. However, note that x2APIC is Intel-specific, and the wider number space |
| // would require a more complicated mapping approach. |
| uint eax = 0x1; |
| uint ebx; |
| uint ecx = 0; |
| uint edx; |
| |
| __asm__ ("cpuid\n\t" : "+a" (eax), "+b" (ebx), "+c" (ecx), "+d" (edx) : ); |
| |
| uint apic_id = (ebx >> 24) & (processor_id_map_size - 1); |
| int processor_id = Atomic::load(&processor_id_map[apic_id]); |
| |
| while (processor_id < 0) { |
| // Assign processor id to APIC id |
| processor_id = Atomic::cmpxchg(&processor_id_map[apic_id], processor_id_unassigned, processor_id_assigning); |
| if (processor_id == processor_id_unassigned) { |
| processor_id = Atomic::fetch_and_add(&processor_id_next, 1) % os::processor_count(); |
| Atomic::store(&processor_id_map[apic_id], processor_id); |
| } |
| } |
| |
| assert(processor_id >= 0 && processor_id < os::processor_count(), "invalid processor id"); |
| |
| return (uint)processor_id; |
| #else // defined(__APPLE__) && defined(__x86_64__) |
| // Return 0 until we find a good way to get the current processor id on |
| // the platform. Returning 0 is safe, since there is always at least one |
| // processor, but might not be optimal for performance in some cases. |
| return 0; |
| #endif |
| } |
| |
| void os::set_native_thread_name(const char *name) { |
| #if defined(__APPLE__) && MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_5 |
| // This is only supported in Snow Leopard and beyond |
| if (name != NULL) { |
| // Add a "Java: " prefix to the name |
| char buf[MAXTHREADNAMESIZE]; |
| snprintf(buf, sizeof(buf), "Java: %s", name); |
| pthread_setname_np(buf); |
| } |
| #endif |
| } |
| |
| bool os::bind_to_processor(uint processor_id) { |
| // Not yet implemented. |
| return false; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // debug support |
| |
| bool os::find(address addr, outputStream* st) { |
| Dl_info dlinfo; |
| memset(&dlinfo, 0, sizeof(dlinfo)); |
| if (dladdr(addr, &dlinfo) != 0) { |
| st->print(INTPTR_FORMAT ": ", (intptr_t)addr); |
| if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) { |
| st->print("%s+%#x", dlinfo.dli_sname, |
| (uint)((uintptr_t)addr - (uintptr_t)dlinfo.dli_saddr)); |
| } else if (dlinfo.dli_fbase != NULL) { |
| st->print("<offset %#x>", (uint)((uintptr_t)addr - (uintptr_t)dlinfo.dli_fbase)); |
| } else { |
| st->print("<absolute address>"); |
| } |
| if (dlinfo.dli_fname != NULL) { |
| st->print(" in %s", dlinfo.dli_fname); |
| } |
| if (dlinfo.dli_fbase != NULL) { |
| st->print(" at " INTPTR_FORMAT, (intptr_t)dlinfo.dli_fbase); |
| } |
| st->cr(); |
| |
| if (Verbose) { |
| // decode some bytes around the PC |
| address begin = clamp_address_in_page(addr-40, addr, os::vm_page_size()); |
| address end = clamp_address_in_page(addr+40, addr, os::vm_page_size()); |
| address lowest = (address) dlinfo.dli_sname; |
| if (!lowest) lowest = (address) dlinfo.dli_fbase; |
| if (begin < lowest) begin = lowest; |
| Dl_info dlinfo2; |
| if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr |
| && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) { |
| end = (address) dlinfo2.dli_saddr; |
| } |
| Disassembler::decode(begin, end, st); |
| } |
| return true; |
| } |
| return false; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // misc |
| |
| // This does not do anything on Bsd. This is basically a hook for being |
| // able to use structured exception handling (thread-local exception filters) |
| // on, e.g., Win32. |
| void os::os_exception_wrapper(java_call_t f, JavaValue* value, |
| const methodHandle& method, JavaCallArguments* args, |
| JavaThread* thread) { |
| f(value, method, args, thread); |
| } |
| |
| static inline struct timespec get_mtime(const char* filename) { |
| struct stat st; |
| int ret = os::stat(filename, &st); |
| assert(ret == 0, "failed to stat() file '%s': %s", filename, os::strerror(errno)); |
| #ifdef __APPLE__ |
| return st.st_mtimespec; |
| #else |
| return st.st_mtim; |
| #endif |
| } |
| |
| int os::compare_file_modified_times(const char* file1, const char* file2) { |
| struct timespec filetime1 = get_mtime(file1); |
| struct timespec filetime2 = get_mtime(file2); |
| int diff = filetime1.tv_sec - filetime2.tv_sec; |
| if (diff == 0) { |
| return filetime1.tv_nsec - filetime2.tv_nsec; |
| } |
| return diff; |
| } |
| |
| // This code originates from JDK's sysOpen and open64_w |
| // from src/solaris/hpi/src/system_md.c |
| |
| int os::open(const char *path, int oflag, int mode) { |
| if (strlen(path) > MAX_PATH - 1) { |
| errno = ENAMETOOLONG; |
| return -1; |
| } |
| int fd; |
| |
| fd = ::open(path, oflag, mode); |
| if (fd == -1) return -1; |
| |
| // If the open succeeded, the file might still be a directory |
| { |
| struct stat buf; |
| int ret = ::fstat(fd, &buf); |
| int st_mode = buf.st_mode; |
| |
| if (ret != -1) { |
| if ((st_mode & S_IFMT) == S_IFDIR) { |
| errno = EISDIR; |
| ::close(fd); |
| return -1; |
| } |
| } else { |
| ::close(fd); |
| return -1; |
| } |
| } |
| |
| // All file descriptors that are opened in the JVM and not |
| // specifically destined for a subprocess should have the |
| // close-on-exec flag set. If we don't set it, then careless 3rd |
| // party native code might fork and exec without closing all |
| // appropriate file descriptors (e.g. as we do in closeDescriptors in |
| // UNIXProcess.c), and this in turn might: |
| // |
| // - cause end-of-file to fail to be detected on some file |
| // descriptors, resulting in mysterious hangs, or |
| // |
| // - might cause an fopen in the subprocess to fail on a system |
| // suffering from bug 1085341. |
| // |
| // (Yes, the default setting of the close-on-exec flag is a Unix |
| // design flaw) |
| // |
| // See: |
| // 1085341: 32-bit stdio routines should support file descriptors >255 |
| // 4843136: (process) pipe file descriptor from Runtime.exec not being closed |
| // 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 |
| // |
| #ifdef FD_CLOEXEC |
| { |
| int flags = ::fcntl(fd, F_GETFD); |
| if (flags != -1) { |
| ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); |
| } |
| } |
| #endif |
| |
| return fd; |
| } |
| |
| |
| // create binary file, rewriting existing file if required |
| int os::create_binary_file(const char* path, bool rewrite_existing) { |
| int oflags = O_WRONLY | O_CREAT; |
| oflags |= rewrite_existing ? O_TRUNC : O_EXCL; |
| return ::open(path, oflags, S_IREAD | S_IWRITE); |
| } |
| |
| // return current position of file pointer |
| jlong os::current_file_offset(int fd) { |
| return (jlong)::lseek(fd, (off_t)0, SEEK_CUR); |
| } |
| |
| // move file pointer to the specified offset |
| jlong os::seek_to_file_offset(int fd, jlong offset) { |
| return (jlong)::lseek(fd, (off_t)offset, SEEK_SET); |
| } |
| |
| // This code originates from JDK's sysAvailable |
| // from src/solaris/hpi/src/native_threads/src/sys_api_td.c |
| |
| int os::available(int fd, jlong *bytes) { |
| jlong cur, end; |
| int mode; |
| struct stat buf; |
| |
| if (::fstat(fd, &buf) >= 0) { |
| mode = buf.st_mode; |
| if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { |
| int n; |
| if (::ioctl(fd, FIONREAD, &n) >= 0) { |
| *bytes = n; |
| return 1; |
| } |
| } |
| } |
| if ((cur = ::lseek(fd, 0L, SEEK_CUR)) == -1) { |
| return 0; |
| } else if ((end = ::lseek(fd, 0L, SEEK_END)) == -1) { |
| return 0; |
| } else if (::lseek(fd, cur, SEEK_SET) == -1) { |
| return 0; |
| } |
| *bytes = end - cur; |
| return 1; |
| } |
| |
| // Map a block of memory. |
| char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, |
| char *addr, size_t bytes, bool read_only, |
| bool allow_exec) { |
| int prot; |
| int flags; |
| |
| if (read_only) { |
| prot = PROT_READ; |
| flags = MAP_SHARED; |
| } else { |
| prot = PROT_READ | PROT_WRITE; |
| flags = MAP_PRIVATE; |
| } |
| |
| if (allow_exec) { |
| prot |= PROT_EXEC; |
| } |
| |
| if (addr != NULL) { |
| flags |= MAP_FIXED; |
| } |
| |
| char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, |
| fd, file_offset); |
| if (mapped_address == MAP_FAILED) { |
| return NULL; |
| } |
| return mapped_address; |
| } |
| |
| |
| // Remap a block of memory. |
| char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, |
| char *addr, size_t bytes, bool read_only, |
| bool allow_exec) { |
| // same as map_memory() on this OS |
| return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, |
| allow_exec); |
| } |
| |
| |
| // Unmap a block of memory. |
| bool os::pd_unmap_memory(char* addr, size_t bytes) { |
| return munmap(addr, bytes) == 0; |
| } |
| |
| // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) |
| // are used by JVM M&M and JVMTI to get user+sys or user CPU time |
| // of a thread. |
| // |
| // current_thread_cpu_time() and thread_cpu_time(Thread*) returns |
| // the fast estimate available on the platform. |
| |
| jlong os::current_thread_cpu_time() { |
| #ifdef __APPLE__ |
| return os::thread_cpu_time(Thread::current(), true /* user + sys */); |
| #else |
| Unimplemented(); |
| return 0; |
| #endif |
| } |
| |
| jlong os::thread_cpu_time(Thread* thread) { |
| #ifdef __APPLE__ |
| return os::thread_cpu_time(thread, true /* user + sys */); |
| #else |
| Unimplemented(); |
| return 0; |
| #endif |
| } |
| |
| jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { |
| #ifdef __APPLE__ |
| return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); |
| #else |
| Unimplemented(); |
| return 0; |
| #endif |
| } |
| |
| jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { |
| #ifdef __APPLE__ |
| struct thread_basic_info tinfo; |
| mach_msg_type_number_t tcount = THREAD_INFO_MAX; |
| kern_return_t kr; |
| thread_t mach_thread; |
| |
| mach_thread = thread->osthread()->thread_id(); |
| kr = thread_info(mach_thread, THREAD_BASIC_INFO, (thread_info_t)&tinfo, &tcount); |
| if (kr != KERN_SUCCESS) { |
| return -1; |
| } |
| |
| if (user_sys_cpu_time) { |
| jlong nanos; |
| nanos = ((jlong) tinfo.system_time.seconds + tinfo.user_time.seconds) * (jlong)1000000000; |
| nanos += ((jlong) tinfo.system_time.microseconds + (jlong) tinfo.user_time.microseconds) * (jlong)1000; |
| return nanos; |
| } else { |
| return ((jlong)tinfo.user_time.seconds * 1000000000) + ((jlong)tinfo.user_time.microseconds * (jlong)1000); |
| } |
| #else |
| Unimplemented(); |
| return 0; |
| #endif |
| } |
| |
| |
| void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { |
| info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits |
| info_ptr->may_skip_backward = false; // elapsed time not wall time |
| info_ptr->may_skip_forward = false; // elapsed time not wall time |
| info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned |
| } |
| |
| void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { |
| info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits |
| info_ptr->may_skip_backward = false; // elapsed time not wall time |
| info_ptr->may_skip_forward = false; // elapsed time not wall time |
| info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned |
| } |
| |
| bool os::is_thread_cpu_time_supported() { |
| #ifdef __APPLE__ |
| return true; |
| #else |
| return false; |
| #endif |
| } |
| |
| // System loadavg support. Returns -1 if load average cannot be obtained. |
| // Bsd doesn't yet have a (official) notion of processor sets, |
| // so just return the system wide load average. |
| int os::loadavg(double loadavg[], int nelem) { |
| return ::getloadavg(loadavg, nelem); |
| } |
| |
| void os::pause() { |
| char filename[MAX_PATH]; |
| if (PauseAtStartupFile && PauseAtStartupFile[0]) { |
| jio_snprintf(filename, MAX_PATH, "%s", PauseAtStartupFile); |
| } else { |
| jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); |
| } |
| |
| int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); |
| if (fd != -1) { |
| struct stat buf; |
| ::close(fd); |
| while (::stat(filename, &buf) == 0) { |
| (void)::poll(NULL, 0, 100); |
| } |
| } else { |
| jio_fprintf(stderr, |
| "Could not open pause file '%s', continuing immediately.\n", filename); |
| } |
| } |
| |
| // Get the kern.corefile setting, or otherwise the default path to the core file |
| // Returns the length of the string |
| int os::get_core_path(char* buffer, size_t bufferSize) { |
| int n = 0; |
| #ifdef __APPLE__ |
| char coreinfo[MAX_PATH]; |
| size_t sz = sizeof(coreinfo); |
| int ret = sysctlbyname("kern.corefile", coreinfo, &sz, NULL, 0); |
| if (ret == 0) { |
| char *pid_pos = strstr(coreinfo, "%P"); |
| // skip over the "%P" to preserve any optional custom user pattern |
| const char* tail = (pid_pos != NULL) ? (pid_pos + 2) : ""; |
| |
| if (pid_pos != NULL) { |
| *pid_pos = '\0'; |
| n = jio_snprintf(buffer, bufferSize, "%s%d%s", coreinfo, os::current_process_id(), tail); |
| } else { |
| n = jio_snprintf(buffer, bufferSize, "%s", coreinfo); |
| } |
| } else |
| #endif |
| { |
| n = jio_snprintf(buffer, bufferSize, "/cores/core.%d", os::current_process_id()); |
| } |
| // Truncate if theoretical string was longer than bufferSize |
| n = MIN2(n, (int)bufferSize); |
| |
| return n; |
| } |
| |
| bool os::supports_map_sync() { |
| return false; |
| } |
| |
| bool os::start_debugging(char *buf, int buflen) { |
| int len = (int)strlen(buf); |
| char *p = &buf[len]; |
| |
| jio_snprintf(p, buflen-len, |
| "\n\n" |
| "Do you want to debug the problem?\n\n" |
| "To debug, run 'gdb /proc/%d/exe %d'; then switch to thread " INTX_FORMAT " (" INTPTR_FORMAT ")\n" |
| "Enter 'yes' to launch gdb automatically (PATH must include gdb)\n" |
| "Otherwise, press RETURN to abort...", |
| os::current_process_id(), os::current_process_id(), |
| os::current_thread_id(), os::current_thread_id()); |
| |
| bool yes = os::message_box("Unexpected Error", buf); |
| |
| if (yes) { |
| // yes, user asked VM to launch debugger |
| jio_snprintf(buf, sizeof(buf), "gdb /proc/%d/exe %d", |
| os::current_process_id(), os::current_process_id()); |
| |
| os::fork_and_exec(buf); |
| yes = false; |
| } |
| return yes; |
| } |
| |
| void os::print_memory_mappings(char* addr, size_t bytes, outputStream* st) {} |