Method GetModuleInfo

src/StackWalker/StackWalker.cpp:801–846

  BOOL GetModuleInfo(HANDLE hProcess, DWORD64 baseAddr, IMAGEHLP_MODULE64_V3 *pModuleInfo)
  {
    memset(pModuleInfo, 0, sizeof(IMAGEHLP_MODULE64_V3));
    if(this->pSGMI == NULL)
    {
      SetLastError(ERROR_DLL_INIT_FAILED);
      return FALSE;
    }
    // First try to use the larger ModuleInfo-Structure
    pModuleInfo->SizeOfStruct = sizeof(IMAGEHLP_MODULE64_V3);
    void *pData = malloc(4096); // reserve enough memory, so the bug in v6.3.5.1 does not lead to memory-overwrites...
    if (pData == NULL)
    {
      SetLastError(ERROR_NOT_ENOUGH_MEMORY);
      return FALSE;
    }
    memcpy(pData, pModuleInfo, sizeof(IMAGEHLP_MODULE64_V3));
    static bool s_useV3Version = true;
    if (s_useV3Version)
    {
      if (this->pSGMI(hProcess, baseAddr, (IMAGEHLP_MODULE64_V3*) pData) != FALSE)
      {
        // only copy as much memory as is reserved...
        memcpy(pModuleInfo, pData, sizeof(IMAGEHLP_MODULE64_V3));
        pModuleInfo->SizeOfStruct = sizeof(IMAGEHLP_MODULE64_V3);
        free(pData);
        return TRUE;
      }
      s_useV3Version = false;  // to prevent unneccessarry calls with the larger struct...
    }

    // could not retrive the bigger structure, try with the smaller one (as defined in VC7.1)...
    pModuleInfo->SizeOfStruct = sizeof(IMAGEHLP_MODULE64_V2);
    memcpy(pData, pModuleInfo, sizeof(IMAGEHLP_MODULE64_V2));
    if (this->pSGMI(hProcess, baseAddr, (IMAGEHLP_MODULE64_V3*) pData) != FALSE)
    {
      // only copy as much memory as is reserved...
      memcpy(pModuleInfo, pData, sizeof(IMAGEHLP_MODULE64_V2));
      pModuleInfo->SizeOfStruct = sizeof(IMAGEHLP_MODULE64_V2);
      free(pData);
      return TRUE;
    }
    free(pData);
    SetLastError(ERROR_DLL_INIT_FAILED);
    return FALSE;
  }
};

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