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#ifndef WINDOWS_CRASHCATCHER_HPP
#define WINDOWS_CRASHCATCHER_HPP
#include <filesystem>
#include <components/crashcatcher/crashcatcher.hpp>
#include <components/misc/windows.hpp>
namespace Crash
{
// The implementation spawns the current executable as a monitor process which waits
// for a global synchronization event which is sent when the parent process crashes.
// The monitor process then extracts crash information from the parent process while
// the parent process waits for the monitor process to finish. The crashed process
// quits and the monitor writes the crash information to a file.
//
// To detect unexpected shutdowns of the application which are not handled by the
// crash handler, the monitor periodically checks the exit code of the parent
// process and exits if it does not return STILL_ACTIVE. You can test this by closing
// the main openmw process in task manager.
static constexpr const int CrashCatcherTimeout = 2500;
static constexpr const int CrashCatcherThawTimeout = 250;
struct CrashSHM;
class CrashCatcher final
{
public:
static CrashCatcher* instance() { return sInstance; }
CrashCatcher(int argc, char** argv, const std::filesystem::path& dumpPath,
const std::filesystem::path& crashDumpName, const std::filesystem::path& freezeDumpName);
~CrashCatcher();
void updateDumpPath(const std::filesystem::path& dumpPath);
void updateDumpNames(const std::filesystem::path& crashDumpName, const std::filesystem::path& freezeDumpName);
private:
static CrashCatcher* sInstance;
// mapped SHM area
CrashSHM* mShm = nullptr;
// the handle is allocated by the catcher and passed to the monitor
// process via the command line which maps the SHM and sends / receives
// events through it
HANDLE mShmHandle = nullptr;
// mutex which guards SHM area
HANDLE mShmMutex = nullptr;
// triggered when the monitor signals the application
HANDLE mSignalAppEvent = INVALID_HANDLE_VALUE;
// triggered when the application wants to wake the monitor process
HANDLE mSignalMonitorEvent = INVALID_HANDLE_VALUE;
void setupIpc();
void shmLock();
void shmUnlock();
void startMonitorProcess(const std::filesystem::path& dumpPath, const std::filesystem::path& crashDumpName,
const std::filesystem::path& freezeDumpName);
void waitMonitor();
bool waitMonitorNoThrow();
void signalMonitor();
void installHandler();
void handleVectoredException(PEXCEPTION_POINTERS info);
public:
static LONG WINAPI vectoredExceptionHandler(PEXCEPTION_POINTERS info);
};
} // namespace Crash
#endif // WINDOWS_CRASHCATCHER_HPP
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