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