src/hotspot/os/posix/os_posix.cpp

@@ -1642,10 +1642,28 @@
   if ((status = pthread_mutexattr_settype(_mutexAttr, PTHREAD_MUTEX_NORMAL)) != 0) {
     fatal("pthread_mutexattr_settype: %s", os::strerror(status));
   }
 }
 
+#ifndef SOLARIS
+sigset_t sigs;
+struct sigaction sigact[NSIG];
+
+struct sigaction* os::Posix::get_preinstalled_handler(int sig) {
+  if (sigismember(&sigs, sig)) {
+    return &sigact[sig];
+  }
+  return NULL;
+}
+
+void os::Posix::save_preinstalled_handler(int sig, struct sigaction& oldAct) {
+  assert(sig > 0 && sig < NSIG, "vm signal out of expected range");
+  sigact[sig] = oldAct;
+  sigaddset(&sigs, sig);
+}
+#endif
+
 // Not all POSIX types and API's are available on all notionally "posix"
 // platforms. If we have build-time support then we will check for actual
 // runtime support via dlopen/dlsym lookup. This allows for running on an
 // older OS version compared to the build platform. But if there is no
 // build time support then there cannot be any runtime support as we do not

@@ -1752,10 +1770,11 @@
                (_clock_gettime != NULL ? "" : " not"));
   log_info(os)("Use of pthread_condattr_setclock is%s supported",
                (_pthread_condattr_setclock != NULL ? "" : " not"));
   log_info(os)("Relative timed-wait using pthread_cond_timedwait is associated with %s",
                _use_clock_monotonic_condattr ? "CLOCK_MONOTONIC" : "the default clock");
+  sigemptyset(&sigs);
 #endif // !SOLARIS
 }
 
 #else // !SUPPORTS_CLOCK_MONOTONIC
 

@@ -1766,10 +1785,11 @@
 void os::Posix::init_2(void) {
 #ifndef SOLARIS
   log_info(os)("Use of CLOCK_MONOTONIC is not supported");
   log_info(os)("Use of pthread_condattr_setclock is not supported");
   log_info(os)("Relative timed-wait using pthread_cond_timedwait is associated with the default clock");
+  sigemptyset(&sigs);
 #endif // !SOLARIS
 }
 
 #endif // SUPPORTS_CLOCK_MONOTONIC