NonSFI NaCl: Plumb Exception IRT enough for breakpad.

chrome/test/data/nacl/nonsfi/libc_free.c

Index: chrome/test/data/nacl/nonsfi/libc_free.c
diff --git a/chrome/test/data/nacl/nonsfi/libc_free.c b/chrome/test/data/nacl/nonsfi/libc_free.c
index ff3aef032a3e10a55bccddc65b00d5bee4b359af..5acf918dd3aea8383e4d99ad8de91d2d1874b06d 100644
--- a/chrome/test/data/nacl/nonsfi/libc_free.c
+++ b/chrome/test/data/nacl/nonsfi/libc_free.c
@@ -20,6 +20,7 @@
 #include "ppapi/nacl_irt/public/irt_ppapi.h"
 
 static struct nacl_irt_basic __libnacl_irt_basic;
+static struct nacl_irt_exception_handling __libnacl_irt_exception_handling;
 static struct nacl_irt_random __libnacl_irt_random;
 static TYPE_nacl_irt_query __nacl_irt_query;
 static struct PPP_Instance_1_0 ppp_instance;
@@ -188,6 +189,36 @@ static void TestRandom(PP_Instance instance) {
   PostStringMessage(instance, "randomsuccess");
 }
 
+static PP_Instance g_instance_for_exception_handler = -1;
+static void MyNaClExceptionHandler(struct NaClExceptionContext *context) {
+  // TODO verify that I have a stack that is set by altstack.
+
+  PostStringMessage(g_instance_for_exception_handler, "exceptionsuccess");
+
+  // Wait until I get killed by testing infrastructure to give chance
+  // to PostMessage to finish asynchronously notifying javascript
+  // instead of crashing immediately.  Doing ppb_console.Log() seems
+  // to also do the job, take your pick.
+  while(1) {
+    __libnacl_irt_basic.sched_yield();
+  }
+}
+
+static void TestException(PP_Instance instance) {
+  // Exception Handling.
+  g_instance_for_exception_handler = instance;
+  if (__libnacl_irt_exception_handling.exception_handler(
+          MyNaClExceptionHandler, NULL)) {
+    PostStringMessage(instance, "Error on registering exception");
+    return;
+  }
+
+  // Crash myself here to invoke the crash handler.
+  *(char*)0 = 0;
+
+  PostStringMessage(instance, "I think I should have crashed already.");
+}
+
 // Handle message from javascript, javascript side will tell me what
 // kind of test it wants, and I will respond accordingly.
 static void HandleMessage(PP_Instance instance, struct PP_Var message) {
@@ -204,6 +235,8 @@ static void HandleMessage(PP_Instance instance, struct PP_Var message) {
     ppb_messaging->PostMessage(instance, message);
   } else if (!my_strncmp("random", message_string, message_len)) {
     TestRandom(instance);
+  } else if (!my_strncmp("exception", message_string, message_len)) {
+    TestException(instance);
   } else {
     // Unknown message came.
     PostStringMessage(instance, "Unknown message type");
@@ -215,6 +248,7 @@ void _start(uintptr_t info[]) {
   grok_auxv(auxv);
   DO_QUERY(NACL_IRT_BASIC_v0_1, __libnacl_irt_basic);
   DO_QUERY(NACL_IRT_RANDOM_v0_1, __libnacl_irt_random);
+  DO_QUERY(NACL_IRT_EXCEPTION_HANDLING_v0_1, __libnacl_irt_exception_handling);
 
   struct nacl_irt_ppapihook ppapihook;
   DO_QUERY(NACL_IRT_PPAPIHOOK_v0_1, ppapihook);