Print a backtrace when a test binary crashes.

base/test_suite.h

Index: base/test_suite.h
diff --git a/base/test_suite.h b/base/test_suite.h
index 236c3edcbc98ac223e2dd72ebe6ad2da8a20ba5d..80f11009e344137339c554b14a97fdd3c3976841 100644
--- a/base/test_suite.h
+++ b/base/test_suite.h
@@ -13,6 +13,7 @@
 #include "base/base_paths.h"
 #include "base/command_line.h"
 #include "base/debug_on_start.h"
+#include "base/debug_util.h"
 #include "base/file_path.h"
 #include "base/icu_util.h"
 #include "base/logging.h"
@@ -34,6 +35,13 @@
 #include <gtk/gtk.h>
 #endif
 
+#if defined(OS_POSIX)
+static void TestSuiteCrashHandler(int signal) {
+  StackTrace().PrintBacktrace();

[agl, 2009/09/03 17:36:33]

Note that, if the crash happens at certain points, this will probably fail or
deadlock. (e.g. a crash in malloc which is still holding the heap lock).
However, it'll work for 99% of cases and that's probably good enough.

+  _exit(1);
+}
+#endif
+
 class TestSuite {
  public:
   TestSuite(int argc, char** argv) {
@@ -124,6 +132,11 @@ class TestSuite {
     action.sa_flags = 0;
     sigemptyset(&action.sa_mask);
     CHECK(sigaction(SIGPIPE, &action, NULL) == 0);
+
+    // TODO(phajdan.jr): Catch other crashy signals, like SIGABRT.
+    CHECK(signal(SIGSEGV, &TestSuiteCrashHandler) != SIG_ERR);
+    CHECK(signal(SIGILL, &TestSuiteCrashHandler) != SIG_ERR);
+    CHECK(signal(SIGBUS, &TestSuiteCrashHandler) != SIG_ERR);

[agl, 2009/09/03 17:36:33]

SIGFPE is probably good too.

 #endif  // OS_POSIX
 
 #if defined(OS_WIN)