CWE-ou-minkata/Sources/Plasma/FeatureLib/pfCrashHandler/plCrashSrv.cpp

/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
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*==LICENSE==*/

#include "plCrashSrv.h"
#include "plCrash_Private.h"
#include "plProduct.h"
#include "plFileSystem.h"

#ifdef HS_BUILD_FOR_WIN32

#include <DbgHelp.h>
#include <ShlObj.h>

plCrashSrv::plCrashSrv(const char* file)
    : fLink(nil), fLinkH(nil)
{
    // Init semas
    IInit(file);

    // Open the linked memory
    fLinkH = OpenFileMappingA(FILE_MAP_ALL_ACCESS, FALSE, file);
    hsAssert(fLinkH, "Failed to open plCrashHandler mapping");
    if (!fLinkH)
        return;

    // Try to map it
    fLink = (plCrashMemLink*)MapViewOfFile(fLinkH, FILE_MAP_ALL_ACCESS, 0, 0, sizeof(plCrashMemLink));
    hsAssert(fLink, "Failed to map plCrashMemLink");
}

plCrashSrv::~plCrashSrv()
{
    if (fLink)
        UnmapViewOfFile((LPCVOID)fLink);
    if (fLinkH)
        CloseHandle(fLinkH);
}

void plCrashSrv::IHandleCrash()
{
    plFileName dumpPath = plFileName::Join(plFileSystem::GetLogPath(), "crash.dmp");
    HANDLE file = CreateFileW(dumpPath.AsString().ToWchar(),
                              GENERIC_WRITE,
                              0,
                              NULL,
                              CREATE_ALWAYS,
                              FILE_ATTRIBUTE_NORMAL,
                              NULL
    );

    MINIDUMP_EXCEPTION_INFORMATION e;
    e.ClientPointers = TRUE;
    e.ExceptionPointers = fLink->fExceptionPtrs;
    e.ThreadId = fLink->fClientThreadID;
    MiniDumpWriteDump(fLink->fClientProcess, fLink->fClientProcessID, file, MiniDumpNormal, &e, NULL, NULL);
    CloseHandle(file);
}

#else
#   error "Implement plCrashSrv for this platform"
#endif

void plCrashSrv::HandleCrash()
{
    if (!fLink)
        FATAL("plCrashMemLink is nil!");
    fLink->fSrvReady = true; // mark us as ready to receive crashes

#ifdef HS_BUILD_FOR_WIN32
    // In Win32 land we have to hackily handle the client process exiting, so we'll wait on both
    // the crashed semaphore and the client process...
    HANDLE hack[2] = { fLink->fClientProcess, fCrashed->GetHandle() };
    DWORD result = WaitForMultipleObjects(arrsize(hack), hack, FALSE, INFINITE);
    hsAssert(result != WAIT_FAILED, "WaitForMultipleObjects failed");
#else
    fCrashed->Wait();
#endif
    if (fLink->fCrashed)
        IHandleCrash();
    fHandled->Signal(); // Tell CrashCli we handled it
}