--- a/src/os_cpu/linux_x86/vm/os_linux_x86.cpp	Tue Jul 30 13:03:28 2013 -0700
+++ b/src/os_cpu/linux_x86/vm/os_linux_x86.cpp	Wed Jul 31 11:00:54 2013 +0200
@@ -209,13 +209,6 @@
   trap_page_fault = 0xE
 };
 
-extern "C" void Fetch32PFI () ;
-extern "C" void Fetch32Resume () ;
-#ifdef AMD64
-extern "C" void FetchNPFI () ;
-extern "C" void FetchNResume () ;
-#endif // AMD64
-
 extern "C" JNIEXPORT int
 JVM_handle_linux_signal(int sig,
                         siginfo_t* info,
@@ -225,6 +218,10 @@
 
   Thread* t = ThreadLocalStorage::get_thread_slow();
 
+  // Must do this before SignalHandlerMark, if crash protection installed we will longjmp away
+  // (no destructors can be run)
+  os::WatcherThreadCrashProtection::check_crash_protection(sig, t);
+
   SignalHandlerMark shm(t);
 
   // Note: it's not uncommon that JNI code uses signal/sigset to install
@@ -278,14 +275,18 @@
   if (info != NULL && uc != NULL && thread != NULL) {
     pc = (address) os::Linux::ucontext_get_pc(uc);
 
-    if (pc == (address) Fetch32PFI) {
-       uc->uc_mcontext.gregs[REG_PC] = intptr_t(Fetch32Resume) ;
-       return 1 ;
+    if (StubRoutines::is_safefetch_fault(pc)) {
+      uc->uc_mcontext.gregs[REG_PC] = intptr_t(StubRoutines::continuation_for_safefetch_fault(pc));
+      return 1;
     }
-#ifdef AMD64
-    if (pc == (address) FetchNPFI) {
-       uc->uc_mcontext.gregs[REG_PC] = intptr_t (FetchNResume) ;
-       return 1 ;
+
+#ifndef AMD64
+    // Halt if SI_KERNEL before more crashes get misdiagnosed as Java bugs
+    // This can happen in any running code (currently more frequently in
+    // interpreter code but has been seen in compiled code)
+    if (sig == SIGSEGV && info->si_addr == 0 && info->si_code == SI_KERNEL) {
+      fatal("An irrecoverable SI_KERNEL SIGSEGV has occurred due "
+            "to unstable signal handling in this distribution.");
     }
 #endif // AMD64