Function WriteMetaFile

src/runtime/crash_handler.cpp:172–199

#ifdef _WIN32

void WriteMetaFile(const char* stamp, EXCEPTION_POINTERS* ep,
                   const std::string& guest_tail) {
    std::string path = JoinPath(g_config.crash_dir,
                                std::string("crash_") + stamp + ".meta");
    std::FILE* f = std::fopen(path.c_str(), "wb");
    if (!f) return;

    DWORD code = ep && ep->ExceptionRecord ? ep->ExceptionRecord->ExceptionCode : 0;
    void* addr = ep && ep->ExceptionRecord ? ep->ExceptionRecord->ExceptionAddress : nullptr;

    std::fprintf(f, "TenBox runtime crash\n");
    std::fprintf(f, "version : %s\n", g_config.version.c_str());
    std::fprintf(f, "vm_id   : %s\n", g_config.vm_id.c_str());
    std::fprintf(f, "pid     : %lu\n", GetCurrentProcessId());
    std::fprintf(f, "tid     : %lu\n", GetCurrentThreadId());
    std::fprintf(f, "code    : 0x%08lx\n", code);
    std::fprintf(f, "address : 0x%p\n", addr);
    if (code == EXCEPTION_ACCESS_VIOLATION && ep && ep->ExceptionRecord
        && ep->ExceptionRecord->NumberParameters >= 2) {
        const ULONG_PTR* p = ep->ExceptionRecord->ExceptionInformation;
        const char* kind = p[0] == 0 ? "read" : (p[0] == 1 ? "write" : "exec");
        std::fprintf(f, "av_kind : %s\n", kind);
        std::fprintf(f, "av_addr : 0x%p\n", reinterpret_cast<void*>(p[1]));
    }
    std::fprintf(f, "\n-- last guest console (%zu bytes) --\n", guest_tail.size());
    std::fwrite(guest_tail.data(), 1, guest_tail.size(), f);
    std::fclose(f);
}

LONG WINAPI TopLevelFilter(EXCEPTION_POINTERS* ep) {
    bool expected = false;