From: Daniel Dunbar <daniel@zuster.org>
Date: Thu, 19 Aug 2010 23:45:39 +0000 (+0000)
Subject: CrashRecovery/Darwin: On Darwin, raise sends a signal to the main thread instead
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b08ceb8135daf015dc38f9d9048cb075215da383;p=oota-llvm.git

CrashRecovery/Darwin: On Darwin, raise sends a signal to the main thread instead
of the current thread. This has the unfortunate effect that assert() and abort()
will end up bypassing our crash recovery attempts. We work around this for
anything in the same linkage unit by just defining our own versions of the
assert handler and abort.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111583 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/System/Unix/Signals.inc b/lib/System/Unix/Signals.inc
index 1e74647e5fd..3e0de66b5d7 100644
--- a/lib/System/Unix/Signals.inc
+++ b/lib/System/Unix/Signals.inc
@@ -253,3 +253,37 @@ void llvm::sys::PrintStackTraceOnErrorSignal() {
   AddSignalHandler(PrintStackTrace, 0);
 }
 
+
+/***/
+
+// On Darwin, raise sends a signal to the main thread instead of the current
+// thread. This has the unfortunate effect that assert() and abort() will end up
+// bypassing our crash recovery attempts. We work around this for anything in
+// the same linkage unit by just defining our own versions of the assert handler
+// and abort.
+
+#ifdef __APPLE__
+
+void __assert_rtn(const char *func,
+                  const char *file,
+                  int line,
+                  const char *expr) {
+  if (func)
+    fprintf(stderr, "Assertion failed: (%s), function %s, file %s, line %d.\n",
+            expr, func, file, line);
+  else
+    fprintf(stderr, "Assertion failed: (%s), file %s, line %d.\n",
+            expr, file, line);
+  abort();
+}
+
+#include <signal.h>
+#include <pthread.h>
+
+void abort() {
+  pthread_kill(pthread_self(), SIGABRT);
+  usleep(1000);
+  __builtin_trap();
+}
+
+#endif