c++ - 使用 CreateToolhelp32Snapshot 时出现 Winapi 访问被拒绝错误

Question

我正在编写将显示其他应用程序的 PID 和基地址的应用程序。我收到了 id 5 的错误，所以Access Denied我的问题是为什么？我以管理员身份打开，构建为发布（而不是调试），有人告诉我应该设置它，但即使这样它仍然是相同的错误。

IDE 是带有编译器 GNU GCC 64x 的 Code::Blocks

控制台输出：

Process ID = 2656
err: 5
INVALID_HANDLE_VALUE returned
BaseAddr = 0

完整代码：

#include <iostream>
#include <Windows.h>
#include <tlhelp32.h>
#include <string.h>

DWORD GetProcId(const char* procName)
{
    DWORD procId = 0;
    HANDLE hSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
    if (hSnap != INVALID_HANDLE_VALUE)
    {
        PROCESSENTRY32 procEntry;
        procEntry.dwSize = sizeof(procEntry);

        if (Process32First(hSnap, &procEntry))
        {
            do
            {
                if (lstrcmpi(procEntry.szExeFile, procName) == 0) {
                    procId = procEntry.th32ProcessID;
                    break;
                }
            } while (Process32Next(hSnap, &procEntry));

        }
    }
    CloseHandle(hSnap);
    return procId;
}

uintptr_t GetModuleBaseAddress(DWORD procId, const char* modName)
{
    uintptr_t modBaseAddr = 0;
    HANDLE hSnap = CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, procId);
    std::cout << "err: " << GetLastError() << std::endl;
    if (hSnap != INVALID_HANDLE_VALUE)
    {
        MODULEENTRY32 modEntry;
        modEntry.dwSize = sizeof(modEntry);
        if (Module32First(hSnap, &modEntry))
        {
            do
            {
                if (!stricmp(modEntry.szModule, modName))
                {
                    modBaseAddr = (uintptr_t)modEntry.modBaseAddr;
                    break;
                }
            } while (Module32Next(hSnap, &modEntry));
        }
    } else {
        std::cout << "INVALID_HANDLE_VALUE returned" << std::endl;
    }
    CloseHandle(hSnap);
    return modBaseAddr;
}

int main()
{
    DWORD procId = GetProcId("Game.exe");

    std::cout << "Process ID = " << procId << std::endl;

    uintptr_t baseAddr = GetModuleBaseAddress(procId, "Game.exe");

    std::cout << "BaseAddr = " << baseAddr << std::endl;

    std::getchar();
    return 0;
}

标签： c++winapi