使用克隆時出現GDB內部錯誤（）

Question

我正在使用Ubuntu 12.04並使用gdb調試下面的代碼。每次撥打clone()時我都會收到以下內部錯誤。

34  pid = clone(entryPt,(char*)pStack+stackSize,SIGCHLD|CLONE_FS|CLONE_FILES|CLONE_VM,&arg); 
(gdb) n 
/build/buildd/gdb-7.4-2012.04/gdb/linux-thread-db.c:418: internal-error: thread_get_info_callback: Assertion `inout->thread_info != NULL' failed. 
A problem internal to GDB has been detected, 
further debugging may prove unreliable. 
Quit this debugging session? (y or n) 

這裏是代碼段。

int taskSpawn(char* name, int priority, int option, int stackSize, FUNCPTR entryPt, int arg) 
{ 
    TblEntry   *Task_Entry; 
    int     Handle, q_idx, old_idx, old_priority; 
    void    *pStack; 
    pid_t    pid = 0; // to be modified. 
    struct _Task  *new_TCB, *old_TCB; 
    /* Get a free entry */ 
    Handle = _CreateHandle(&Task_Entry); 

    if(Handle == -1) 
     return -1; // fail to spawn task. 

    pStack = malloc(stackSize); 
    // Call clone(). 
#ifdef __linux 
    pid = clone(entryPt, 
       (char*)pStack+stackSize, 
       SIGCHLD|CLONE_FS|CLONE_FILES|CLONE_VM, 
       &arg); 
    kill(pid, SIGSTOP); 
    printf("clone returns %d\n", pid); 

    if(pid < 0) 
    { 
     exit(0); 
    } 

#endif 
return 0; 
} 

爲什麼clone()給我這個錯誤？
預先感謝您。

Answer 1

這不是你的錯。這是GDB中的一個錯誤：https://sourceware.org/bugzilla/show_bug.cgi?id=18006