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73 lines
2.3 KiB
C++
73 lines
2.3 KiB
C++
#ifndef WINDOWS_CRASHCATCHER_HPP
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#define WINDOWS_CRASHCATCHER_HPP
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#include <filesystem>
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#include <components/crashcatcher/crashcatcher.hpp>
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#include <components/windows.hpp>
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namespace Crash
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{
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// The implementation spawns the current executable as a monitor process which waits
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// for a global synchronization event which is sent when the parent process crashes.
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// The monitor process then extracts crash information from the parent process while
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// the parent process waits for the monitor process to finish. The crashed process
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// quits and the monitor writes the crash information to a file.
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//
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// To detect unexpected shutdowns of the application which are not handled by the
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// crash handler, the monitor periodically checks the exit code of the parent
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// process and exits if it does not return STILL_ACTIVE. You can test this by closing
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// the main openmw process in task manager.
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static constexpr const int CrashCatcherTimeout = 2500;
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struct CrashSHM;
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class CrashCatcher final
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{
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public:
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CrashCatcher(int argc, char** argv, const std::filesystem::path& crashLogPath);
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~CrashCatcher();
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private:
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static CrashCatcher* sInstance;
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// mapped SHM area
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CrashSHM* mShm = nullptr;
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// the handle is allocated by the catcher and passed to the monitor
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// process via the command line which maps the SHM and sends / receives
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// events through it
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HANDLE mShmHandle = nullptr;
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// mutex which guards SHM area
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HANDLE mShmMutex = nullptr;
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// triggered when the monitor signals the application
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HANDLE mSignalAppEvent = INVALID_HANDLE_VALUE;
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// triggered when the application wants to wake the monitor process
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HANDLE mSignalMonitorEvent = INVALID_HANDLE_VALUE;
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void setupIpc();
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void shmLock();
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void shmUnlock();
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void startMonitorProcess(const std::filesystem::path& crashLogPath);
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void waitMonitor();
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void signalMonitor();
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void installHandler();
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void handleVectoredException(PEXCEPTION_POINTERS info);
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public:
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static LONG WINAPI vectoredExceptionHandler(PEXCEPTION_POINTERS info);
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};
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} // namespace Crash
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#endif // WINDOWS_CRASHCATCHER_HPP
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