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

/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011  Cyan Worlds, Inc.

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Additional permissions under GNU GPL version 3 section 7

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*==LICENSE==*/

#include "plCrashCli.h"
#include "plCrash_Private.h"
#include "plString.h"

#ifdef HS_BUILD_FOR_WIN32

plCrashCli::plCrashCli()
    : fLink(nil), fLinkH(nil)
{
    char mapname[128];
    char cmdline[128];
    snprintf(mapname, arrsize(mapname), "Plasma20CrashHandler-%u", GetCurrentProcessId());
    snprintf(cmdline, arrsize(cmdline), "%s %s", CRASH_HANDLER_EXE, mapname);
    memset(&fCrashSrv, 0, sizeof(PROCESS_INFORMATION));

    // Initialize the semas
    IInit(mapname);

    // Initialize the shared memory
    fLinkH = CreateFileMappingA(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, sizeof(plCrashMemLink), mapname);
    hsAssert(fLinkH, "Failed to create plCrashHandler mapping");
    if (!fLinkH)
        return;

    // Map the shared memory
    fLink = (plCrashMemLink*)MapViewOfFile(fLinkH, FILE_MAP_ALL_ACCESS, 0, 0, sizeof(plCrashMemLink));
    hsAssert(fLink, "Failed to map plCrashLinkedMem");
    if (!fLink)
        return;
    memset(fLink, 0, sizeof(plCrashMemLink));
    fLink->fClientProcessID = GetCurrentProcessId();

    // Start the plCrashHandler before a crash
    STARTUPINFOA info; memset(&info, 0, sizeof(info));
    info.cb = sizeof(STARTUPINFOA);
    CreateProcessA(
                   CRASH_HANDLER_EXE, // plCrashHandler.exe
                   cmdline,           // plCrashHandler.exe Plasma20CrashHandler-%u
                   NULL,
                   NULL,
                   FALSE,
                   CREATE_NO_WINDOW, // Don't create any new windows or consoles
                   NULL,
                   NULL,             // Use the directory of the current plClient
                   &info,
                   &fCrashSrv        // Save the CrashSrv handles
    );

    HANDLE curProc = GetCurrentProcess();
    DuplicateHandle(curProc,                  // Handle to the source process
                    curProc,                  // Handle that we want duplicated
                    fCrashSrv.hProcess,       // Handle to target process
                    &fLink->fClientProcess,   // Pointer to Handle to dupliicate to
                    0,                        // Ignored
                    FALSE,
                    DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS
    );
}

plCrashCli::~plCrashCli()
{
    fCrashed->Signal(); // forces the CrashSrv to exit, if it's still running
    if (fCrashSrv.hProcess)
    {
        TerminateProcess(fCrashSrv.hProcess, 0);
        CloseHandle(fCrashSrv.hProcess);
    }
    if (fCrashSrv.hThread)
        CloseHandle(fCrashSrv.hThread);
    if (fLink)
        UnmapViewOfFile((LPCVOID)fLink);
    if (fLinkH)
        CloseHandle(fLinkH);
}

void plCrashCli::ReportCrash(PEXCEPTION_POINTERS e)
{
    hsAssert(fLink, "plCrashMemLink is nil");
    if (fLink)
    {
        fLink->fClientThreadID = GetCurrentThreadId();
        fLink->fCrashed = true;
        fLink->fExceptionPtrs  = e;
    }

    fCrashed->Signal();
}

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

void plCrashCli::WaitForHandle()
{
    // Don't deadlock... Only wait if the CrashSrv is attached
    if (fLink && fLink->fSrvReady)
        fHandled->Wait();
}