diff -r 000000000000 -r 6474c204b198 toolkit/crashreporter/test/nsTestCrasher.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/crashreporter/test/nsTestCrasher.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,126 @@
+#include "mozilla/Assertions.h"
+
+#include <stdio.h>
+
+#include "nscore.h"
+#include "nsXULAppAPI.h"
+#include "nsExceptionHandler.h"
+#include "mozilla/unused.h"
+
+/*
+ * This pure virtual call example is from MSDN
+ */
+class A;
+
+void fcn( A* );
+
+class A
+{
+public:
+  virtual void f() = 0;
+  A() { fcn( this ); }
+};
+
+class B : A
+{
+  void f() { }
+public:
+  void use() { }
+};
+
+void fcn( A* p )
+{
+  p->f();
+}
+
+void PureVirtualCall()
+{
+  // generates a pure virtual function call
+  B b;
+  b.use(); // make sure b's actually used
+}
+
+// Keep these in sync with CrashTestUtils.jsm!
+const int16_t CRASH_INVALID_POINTER_DEREF = 0;
+const int16_t CRASH_PURE_VIRTUAL_CALL     = 1;
+const int16_t CRASH_RUNTIMEABORT          = 2;
+const int16_t CRASH_OOM                   = 3;
+const int16_t CRASH_MOZ_CRASH             = 4;
+const int16_t CRASH_ABORT                 = 5;
+
+extern "C" NS_EXPORT
+void Crash(int16_t how)
+{
+  switch (how) {
+  case CRASH_INVALID_POINTER_DEREF: {
+    volatile int* foo = (int*)0x42;
+    *foo = 0;
+    // not reached
+    break;
+  }
+  case CRASH_PURE_VIRTUAL_CALL: {
+    PureVirtualCall();
+    // not reached
+    break;
+  }
+  case CRASH_RUNTIMEABORT: {
+    NS_RUNTIMEABORT("Intentional crash");
+    break;
+  }
+  case CRASH_OOM: {
+    mozilla::unused << moz_xmalloc((size_t) -1);
+    mozilla::unused << moz_xmalloc((size_t) -1);
+    mozilla::unused << moz_xmalloc((size_t) -1);
+    break;
+  }
+  case CRASH_MOZ_CRASH: {
+    MOZ_CRASH();
+    break;
+  }
+  case CRASH_ABORT: {
+    abort();
+    break;
+  }
+  default:
+    break;
+  }
+}
+
+extern "C" NS_EXPORT
+nsISupports* LockDir(nsIFile *directory)
+{
+  nsISupports* lockfile = nullptr;
+  XRE_LockProfileDirectory(directory, &lockfile);
+  return lockfile;
+}
+
+char testData[32];
+
+extern "C" NS_EXPORT
+uint64_t SaveAppMemory()
+{
+  for (size_t i=0; i<sizeof(testData); i++)
+    testData[i] = i;
+
+  FILE *fp = fopen("crash-addr", "w");
+  if (!fp)
+    return 0;
+  fprintf(fp, "%p\n", (void *)testData);
+  fclose(fp);
+
+  return (int64_t)testData;
+}
+
+#ifdef XP_WIN32
+static LONG WINAPI HandleException(EXCEPTION_POINTERS* exinfo)
+{
+  TerminateProcess(GetCurrentProcess(), 0);
+  return 0;
+}
+
+extern "C" NS_EXPORT
+void TryOverrideExceptionHandler()
+{
+  SetUnhandledExceptionFilter(HandleException);
+}
+#endif