src/hotspot/os/posix/os_posix.cpp

*** 1642,1651 ****
--- 1642,1669 ----
    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
*** 1752,1761 ****
--- 1770,1780 ----
                 (_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
  
*** 1766,1775 ****
--- 1785,1795 ----
  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