src/hotspot/os/linux/os_linux.cpp

@@ -4461,15 +4461,10 @@
 // This boolean allows users to forward their own non-matching signals
 // to JVM_handle_linux_signal, harmlessly.
 bool os::Linux::signal_handlers_are_installed = false;
 
 // For signal-chaining
-struct sigaction sigact[NSIG];
-uint64_t sigs = 0;
-#if (64 < NSIG-1)
-#error "Not all signals can be encoded in sigs. Adapt its type!"
-#endif
 bool os::Linux::libjsig_is_loaded = false;
 typedef struct sigaction *(*get_signal_t)(int);
 get_signal_t os::Linux::get_signal_action = NULL;
 
 struct sigaction* os::Linux::get_chained_signal_action(int sig) {

@@ -4479,11 +4474,11 @@
     // Retrieve the old signal handler from libjsig
     actp = (*get_signal_action)(sig);
   }
   if (actp == NULL) {
     // Retrieve the preinstalled signal handler from jvm
-    actp = get_preinstalled_handler(sig);
+    actp = os::Posix::get_preinstalled_handler(sig);
   }
 
   return actp;
 }
 

@@ -4543,23 +4538,10 @@
     }
   }
   return chained;
 }
 
-struct sigaction* os::Linux::get_preinstalled_handler(int sig) {
-  if ((((uint64_t)1 << (sig-1)) & sigs) != 0) {
-    return &sigact[sig];
-  }
-  return NULL;
-}
-
-void os::Linux::save_preinstalled_handler(int sig, struct sigaction& oldAct) {
-  assert(sig > 0 && sig < NSIG, "vm signal out of expected range");
-  sigact[sig] = oldAct;
-  sigs |= (uint64_t)1 << (sig-1);
-}
-
 // for diagnostic
 int sigflags[NSIG];
 
 int os::Linux::get_our_sigflags(int sig) {
   assert(sig > 0 && sig < NSIG, "vm signal out of expected range");

@@ -4587,11 +4569,11 @@
     if (AllowUserSignalHandlers || !set_installed) {
       // Do not overwrite; user takes responsibility to forward to us.
       return;
     } else if (UseSignalChaining) {
       // save the old handler in jvm
-      save_preinstalled_handler(sig, oldAct);
+      os::Posix::save_preinstalled_handler(sig, oldAct);
       // libjsig also interposes the sigaction() call below and saves the
       // old sigaction on it own.
     } else {
       fatal("Encountered unexpected pre-existing sigaction handler "
             "%#lx for signal %d.", (long)oldhand, sig);