Attachment 197221 Details for Bug 292981 – A case compialed natively can reproduce the problem

A case compialed natively can reproduce the problem

ptrace_exec64.c (text/plain), 4.49 KB, created by Eric Lin on 2007-09-17 09:58:01 UTC

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Creator: Eric Lin

Created: 2007-09-17 09:58:01 UTC

Size: 4.49 KB

patch

obsolete

>/* 
>* set optioins, PTRACE_O_TRACECLONE, debugger deal with multi-thread debuggees;
> */
>#include <stdio.h>
>#include <sys/ptrace.h>
>#include <sys/types.h>
>#include <sys/wait.h>
>//#include <asm/user.h>
>#include <unistd.h>
>//#include <asm/unistd.h>
>#include <errno.h>
>#include <time.h>
>#include <signal.h>
>#include <assert.h>
>#include <string.h>
>//#include <asm/ptrace.h>
>#include <sched.h>
>#define PTRACE_O_TRACESYSGOOD   0x00000001
>#define PTRACE_O_TRACEFORK      0x00000002
>#define PTRACE_O_TRACEVFORK     0x00000004
>#define PTRACE_O_TRACECLONE     0x00000008
>#define PTRACE_O_TRACEEXEC      0x00000010
>#define PTRACE_O_TRACEVFORKDONE 0x00000020
>#define PTRACE_O_TRACEEXIT      0x00000040
>
>#define PTRACE_O_MASK           0x0000007f
>
>/* 0x4200-0x4300 are reserved for architecture-independent additions.  */
>#ifndef PTRACE_SETOPTIONS
>#define PTRACE_SETOPTIONS	0x4200
>#endif
>#define PTRACE_GETEVENTMSG	0x4201
>#define PTRACE_GETSIGINFO	0x4202
>#define PTRACE_SETSIGINFO	0x4203
>
>
>
>void sigchld_handler (int signo, siginfo_t * siginfo, void * ctx)
>{
>    fprintf(stderr, "sigchld_handler: pid = %d signo = %d si_code=%d si_pid=%d\n",
>            getpid(), signo, siginfo->si_code, siginfo->si_pid);
>    /* empty handler, just for the purpose of SA_RESTART */
>}
>
>char *argv[2] = {"-C", "./script.sh"};
>
>int main(int argc, char ** argv, char ** envp)
>{
>    int pid;
>    long   ret;
>    struct sigaction act;
>    memset(&act, 0, sizeof(act));
>    act.sa_sigaction = sigchld_handler;
>    act.sa_flags = SA_RESTART | SA_SIGINFO;
>    ret = sigaction (SIGCHLD, &act, NULL);
>    if (ret < 0) {
>        perror ("sigaction failed");
>        return -1;
>    }
>    fprintf (stderr, "parent pid=%d\n", getpid());
>
>    if ((pid = fork()) == -1) {
>        printf("fail to fork!\n");
>        return -1;
>    } else if (pid == 0) {
>	ret = ptrace(PTRACE_TRACEME, NULL, NULL, NULL);
>        if (ret != 0) {
>            perror ("PTRACE_TRACEME failed");
>        }
>        kill(getpid(), SIGUSR1);
>
>	//ret = execv("./helloworld", NULL);
>	//ret = execv("/bin/bash", argv);
>	ret = execv("./script.sh", NULL);
>
>	if (ret <= 0) {
>	    fprintf (stderr, "execve error, %d\n", ret);
>	    perror ("execv");
>	    return -1;
>	}
>	return 0;
>    } else {
>        int tmp_pid;
>        int status;
>	int option;
>        tmp_pid = wait4(pid, &status, WUNTRACED, NULL);
>        if (tmp_pid < 0) {
>            perror ("wait4 failed");
>            return -1;
>        }
>        if (WIFEXITED(status)) {
>            fprintf(stderr, "wait4: exit %d\n", WEXITSTATUS(status));
>	} else if (WIFSIGNALED(status)) {
>            fprintf(stderr, "wait4: kill signal %d\n", WTERMSIG(status));
>        } else { 
>            fprintf(stderr, "wait4: stop signal %d\n", WSTOPSIG(status));
>        }
>
>	
>        assert(tmp_pid == pid);
>        assert(WIFSTOPPED(status) && (WSTOPSIG(status) == SIGUSR1));
>
>	option = PTRACE_O_TRACEEXEC;
>	/*set fork option*/
>	ret = ptrace(PTRACE_SETOPTIONS, pid, NULL, option);
>	if (ret == -1) {
>	    perror ("ptrace_setoptions: PTRACE_O_TRACEEXEC");
>	    return -1;
>	}	
>
>	ret = ptrace(PTRACE_CONT, pid, NULL, NULL);
>	if (ret == -1) {
>		perror("ptrace_cont error");
>		return -1;
>	}
>
>        tmp_pid = wait4(pid, &status, WUNTRACED, NULL);
>        if (tmp_pid < 0) {
>            perror ("wait4 failed");
>            return -1;
>        }
>        if (WIFEXITED(status)) {
>            fprintf(stderr, "wait4: exit %d\n", WEXITSTATUS(status));
>	} else if (WIFSIGNALED(status)) {
>            fprintf(stderr, "wait4: kill signal %d\n", WTERMSIG(status));
>        } else { 
>            fprintf(stderr, "wait4: stop signal %d\n", WSTOPSIG(status));
>        }
>        assert(tmp_pid == pid);
>        assert(WIFSTOPPED(status) && (WSTOPSIG(status) == SIGTRAP));
>	//get the value from exec
>	fprintf(stderr, "status = %x\n", status);
>#define PTRACE_EVENT_EXEC 4
>	assert((status>>16) == PTRACE_EVENT_EXEC); 
>
>	
>	ret = ptrace(PTRACE_CONT, pid, NULL, NULL);
>	if (ret <= -1) {
>		perror ("ptrace_cont error, child");
>		return -1;
>	}	
>		
>	
>        tmp_pid = wait4(pid, &status, WUNTRACED, NULL);
>        if (tmp_pid < 0) {
>            perror ("wait4 failed");
>            return -1;
>        }
>        if (WIFEXITED(status)) {
>            fprintf(stderr, "wait4: exit %d\n", WEXITSTATUS(status));
>	} else if (WIFSIGNALED(status)) {
>            fprintf(stderr, "wait4: kill signal %d\n", WTERMSIG(status));
>        } else { 
>            fprintf(stderr, "wait4: stop signal %d, status=%x\n", WSTOPSIG(status), status);
>        }
>
>	assert (tmp_pid == pid);
>	assert (WIFEXITED(status) && WEXITSTATUS(status) == 0);
>
>    	printf ("pass\n");
>    }
>    return 0;
>}

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