Debug exit code

base/debug/stack_trace_posix.cc

Index: base/debug/stack_trace_posix.cc
diff --git a/base/debug/stack_trace_posix.cc b/base/debug/stack_trace_posix.cc
index 27a656e6caffe7a3efc58fda7c4758b5d7fcdf77..2ce584059227056f77c106f15a16a91e6e3e0894 100644
--- a/base/debug/stack_trace_posix.cc
+++ b/base/debug/stack_trace_posix.cc
@@ -221,10 +221,11 @@ void StackDumpSignalHandler(int signal, siginfo_t* info, void* void_context) {
   if (BeingDebugged())
     BreakDebugger();
 
-  PrintToStderr("Received signal ");
+  PrintToStderr("Received SSSS signal ");
   char buf[1024] = { 0 };
   internal::itoa_r(signal, buf, sizeof(buf), 10, 0);
   PrintToStderr(buf);
+  PrintToStderr("\n");
   if (signal == SIGBUS) {
     if (info->si_code == BUS_ADRALN)
       PrintToStderr(" BUS_ADRALN ");
@@ -296,7 +297,9 @@ void StackDumpSignalHandler(int signal, siginfo_t* info, void* void_context) {
   }
 #endif
 
+  PrintToStderr("Before stacktrace print\n");
   debug::StackTrace().Print();
+  PrintToStderr("After stacktrace print\n");
 
 #if defined(OS_LINUX)
 #if ARCH_CPU_X86_FAMILY
@@ -374,12 +377,15 @@ void StackDumpSignalHandler(int signal, siginfo_t* info, void* void_context) {
   PrintToStderr("[end of stack trace]\n");
 
 #if defined(OS_MACOSX) && !defined(OS_IOS)
-  if (::signal(signal, SIG_DFL) == SIG_ERR)
+  if (::signal(signal, SIG_DFL) == SIG_ERR) {
+    PrintToStderr("::signal(signal, SIG_DFL)\n");
     _exit(1);
+  }
 #else
   // Non-Mac OSes should probably reraise the signal as well, but the Linux
   // sandbox tests break on CrOS devices.
   // https://code.google.com/p/chromium/issues/detail?id=551681
+  PrintToStderr("Before _exit(1)\n");
   _exit(1);
 #endif  // defined(OS_MACOSX) && !defined(OS_IOS)
 }
@@ -683,6 +689,8 @@ bool EnableInProcessStackDumping() {
   SandboxSymbolizeHelper::GetInstance();
 #endif  // USE_SYMBOLIZE
 
+  fprintf(stderr, "EnableInProcessStackDumping\n");
+
   // When running in an application, our code typically expects SIGPIPE
   // to be ignored.  Therefore, when testing that same code, it should run
   // with SIGPIPE ignored as well.