1013 
1014   siglongjmp(_jmpbuf, 1);
1015 }
1016 
1017 void os::WatcherThreadCrashProtection::check_crash_protection(int sig,
1018     Thread* thread) {
1019 
1020   if (thread != NULL &&
1021       thread->is_Watcher_thread() &&
1022       WatcherThread::watcher_thread()->has_crash_protection()) {
1023 
1024     if (sig == SIGSEGV || sig == SIGBUS) {
1025       WatcherThread::watcher_thread()->crash_protection()->restore();
1026     }
1027   }
1028 }
1029 
1030 #define check_with_errno(check_type, cond, msg)                                      \
1031   do {                                                                               \
1032     int err = errno;                                                                 \
1033     check_type(cond, err_msg("%s; error='%s' (errno=%d)", msg, strerror(err), err)); \
1034 } while (false)
1035 
1036 #define assert_with_errno(cond, msg)    check_with_errno(assert, cond, msg)
1037 #define guarantee_with_errno(cond, msg) check_with_errno(guarantee, cond, msg)
1038 
1039 // POSIX unamed semaphores are not supported on OS X.
1040 #ifndef __APPLE__
1041 
1042 PosixSemaphore::PosixSemaphore(uint value) {
1043   int ret = sem_init(&_semaphore, 0, value);
1044 
1045   guarantee_with_errno(ret == 0, "Failed to initialize semaphore");
1046 }
1047 
1048 PosixSemaphore::~PosixSemaphore() {
1049   sem_destroy(&_semaphore);
1050 }
1051 
1052 void PosixSemaphore::signal(uint count) {
1053   for (uint i = 0; i < count; i++) {

1013 
1014   siglongjmp(_jmpbuf, 1);
1015 }
1016 
1017 void os::WatcherThreadCrashProtection::check_crash_protection(int sig,
1018     Thread* thread) {
1019 
1020   if (thread != NULL &&
1021       thread->is_Watcher_thread() &&
1022       WatcherThread::watcher_thread()->has_crash_protection()) {
1023 
1024     if (sig == SIGSEGV || sig == SIGBUS) {
1025       WatcherThread::watcher_thread()->crash_protection()->restore();
1026     }
1027   }
1028 }
1029 
1030 #define check_with_errno(check_type, cond, msg)                             \
1031   do {                                                                      \
1032     int err = errno;                                                        \
1033     check_type(cond, "%s; error='%s' (errno=%d)", msg, strerror(err), err); \
1034 } while (false)
1035 
1036 #define assert_with_errno(cond, msg)    check_with_errno(assert, cond, msg)
1037 #define guarantee_with_errno(cond, msg) check_with_errno(guarantee, cond, msg)
1038 
1039 // POSIX unamed semaphores are not supported on OS X.
1040 #ifndef __APPLE__
1041 
1042 PosixSemaphore::PosixSemaphore(uint value) {
1043   int ret = sem_init(&_semaphore, 0, value);
1044 
1045   guarantee_with_errno(ret == 0, "Failed to initialize semaphore");
1046 }
1047 
1048 PosixSemaphore::~PosixSemaphore() {
1049   sem_destroy(&_semaphore);
1050 }
1051 
1052 void PosixSemaphore::signal(uint count) {
1053   for (uint i = 0; i < count; i++) {