Question

我正在增强一个本机应用程序，该应用程序已经是Google源代码的一部分。我看到了车祸。我试过调试这个，但无法得出结论。非常感谢您的帮助：

struct device_global {
    struct support *sport;
    struct support_params params;
    struct global_priv *ctrl;

#if defined FEATURE_1
    int freq, freq_2;
#endif /* FEATURE_1 */

#ifdef FEATURE_2
    int wifi_display;
    #define SUBELEMS 10
    struct buf *subelem[MAX_SUBELEMS];
#endif /* FEATURE_2 */

    struct list_entry *add_list_entry;

#ifdef FEATURE_3
    void* my_context;
#endif /* FEATURE_3 */
};

typedef unsigned long       DWORD;
typedef DWORD           *PDWORD;

typedef struct
{
    DWORD dwFlags;
    DWORD dwErrorCode;
    DWORD dwDeviceId;

#ifdef FEATURE_X
    CHAR* tableFileName;
#endif

#ifdef FEATURE_Y
    FILE* tableFile;
    DWORD headerVersion;
    DWORD headerSize;
#endif
} CONTEXT1, *CONTEXT2;


struct device_global * init(struct support_params *params)
{
    struct device_global *global;
    global = os_malloc(sizeof(*global));
    if (params->ctrl)
            global->params.ctrl =  os_strdup(params->ctrl);
    // Assignment of other global variables done here like above (not added here to remove clutter)

    int deviceId = 0;
    if (0 == getDeviceId(global->my_context, (PDWORD) &deviceId))
    {
        printf("Device ID 0x%x", deviceId);
    }
    printf("Before returning global");    // gets printed before crash
    return global;   // crashes here
}



DWORD getDeviceId(PVOID pContext, PDWORD myDeviceId)
{
    CONTEXT2 myContext;

    if (!pContext || !myDeviceId)
    {
        return -1;
    }
    else
    {
        myContext = (CONTEXT2) pContext;
        *myDeviceId = myContext->dwDeviceId;
    }

    return 0;
}

崩溃恰好发生在“return global”的init方法中。打印printf语句并在此之后出现崩溃。请分享您宝贵的意见。

与崩溃相对应的错误消息是：

03-16 12:30:03.230  5626  5626 F DEBUG   : signal 6 (SIGABRT), code -6 (SI_TKILL), fault addr --------
03-16 12:30:03.232  5626  5626 F DEBUG   : Abort message: 'stack corruption detected'

Answer 1

此处未初始化my_context指针：

if (0 == getDeviceId(global->my_context, (PDWORD) &deviceId))

因此，您的程序会显示未定义的行为，最终导致崩溃。

Android本机进程：检测到堆栈损坏

1 个答案: