Mercurial > hg > truffle

diff src/os_cpu/linux_x86/vm/os_linux_x86.cpp @ 11029:9ba41a4a71ff

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
8004124: Handle and/or warn about SI_KERNEL Summary: Detect this crash in the signal handler and give a fatal error message instead of making us chase down bugs that don't reproduce Reviewed-by: kvn, mgerdin, dholmes
author coleenp
date Fri, 21 Jun 2013 10:50:19 -0400
parents 2cb5d5f6d5e5
children 980532a806a5 5e3b6f79d280
line wrap: on
line diff
--- a/src/os_cpu/linux_x86/vm/os_linux_x86.cpp	Thu Jun 20 11:53:51 2013 +0200
+++ b/src/os_cpu/linux_x86/vm/os_linux_x86.cpp	Fri Jun 21 10:50:19 2013 -0400
@@ -289,6 +289,16 @@
     }
 #endif // AMD64
 
+#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
+
     // Handle ALL stack overflow variations here
     if (sig == SIGSEGV) {
       address addr = (address) info->si_addr;