Breakpad on Windows

Exception Handling

Windows’ SEH can be handled with compiler extension __try {} __exception() {} or by setting top-level handler via SetUnhandledExceptionFilter(). The latter is tricky since it’s easy to replace a previous registered handler whenever a module or library wants to.

Breakpad

Breakpad implements ExceptionHandler for Windows. It registers an exception handler that capable of dump minidump to a specified directory. It uses, unfortunately, SetUnhandledExceptionFilter() and potentially fail to capture an exception if another handler was registered after Breakpad.

Solution

We are left with __try {} __exception() {} as follows.

using namespace google_breakpad;
auto handler = ExceptionHandler(L"dumps", nullptr, nullptr, nullptr, 
	ExceptionHandler::HANDLER_NONE);
__try {
  // ...
} __except(
	(handler.WriteMinidumpForException(::GetExceptionInformation(), EXCEPTION_EXECUTE_HANDLER)
) {}

Note that GetExceptionInformation() is avail only in filter expression of __except(filter expression).

References

Breakpad repository
MSDN
Examples

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