Adding untrusted crash dump / stack trace tests.

tests/untrusted_crash_dump/untrusted_crash_dump_test.c

Index: tests/untrusted_crash_dump/untrusted_crash_dump_test.c
diff --git a/tests/untrusted_crash_dump/untrusted_crash_dump_test.c b/tests/untrusted_crash_dump/untrusted_crash_dump_test.c
new file mode 100644
index 0000000000000000000000000000000000000000..63f696ec2c481592a06b4cffecaf33ac561fc7b0
--- /dev/null
+++ b/tests/untrusted_crash_dump/untrusted_crash_dump_test.c
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2012 The Native Client Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "native_client/tests/untrusted_crash_dump/untrusted_crash_dump.h"
+
+#if defined(IN_BROWSER)
+#include "native_client/src/shared/srpc/nacl_srpc.h"
+#include "native_client/src/shared/srpc/nacl_srpc_ppapi_plugin_internal.h"
+#endif
+
+void CallMe(void (*func)(int), int);
+
+void layer5(int x, int y) {
+  *(volatile int *)x = y;
+}
+
+void layer4(int x) {
+  layer5(x, 1);
+}
+
+void layer3(int a, int b, int c) {
+  CallMe(layer4, a + b + c);
+}
+
+void layer2(int i, int j) {
+  layer3(i, j, 7);
+}
+
+void layer1(int s, int t) {
+  layer2(s + 5, t + 1);
+}
+
+int main(int argc, char *argv[]) {
+#if defined(IN_BROWSER)
+  if (!NaClSrpcModuleInit())
+    return -1;
+  NaClPluginLowLevelInitializationComplete();

[Mark Seaborn, 2012/02/06 19:44:06]

Please comment what this is for.  Do we actually need to sync with the trusted
plugin?

[bradn, 2012/02/06 22:27:48]

Ooops, cargo cult.
Dropped.

+#endif
+
+  NaClCrashDumpInit(argv[0]);
+
+  layer1(2, 9);
+
+  NaClCrashDumpDestroy();
+
+  fprintf(stderr, "** intended_exit_status=0\n");

[Mark Seaborn, 2012/02/06 19:44:06]

Surely you expect it to crash and not reach here?  So just 'return 1' here.

[bradn, 2012/02/06 22:27:48]

Whoops.
Leftover, thanks.
Done.

+  return 0;
+}