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Fixed a couple of races with exiting threads in suspend_for_ptrace().

This commit is contained in:
Alexandre Julliard 2003-05-06 00:21:21 +00:00
parent ab61506401
commit fcbd0da4a2
1 changed files with 6 additions and 6 deletions
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12
server/ptrace.c
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@ -135,7 +135,7 @@ void sigchld_callback(void)
}
/* wait for a ptraced child to get a certain signal */
static void wait4_thread( struct thread *thread, int signal )
static int wait4_thread( struct thread *thread, int signal )
{
int res, status;
@ -150,10 +150,11 @@ static void wait4_thread( struct thread *thread, int signal )
thread->attached = 0;
}
else perror( "wait4" );
return;
return 0;
}
res = handle_child_status( thread, res, status, signal );
} while (res && res != signal);
return (thread->unix_pid != -1);
}
/* return the Unix pid to use in ptrace calls for a given thread */
@ -199,8 +200,7 @@ static int attach_thread( struct thread *thread )
}
if (debug_level) fprintf( stderr, "%04x: *attached*\n", thread->id );
thread->attached = 1;
wait4_thread( thread, SIGSTOP );
return 1;
return wait4_thread( thread, SIGSTOP );
}
/* detach from a Unix thread and kill it */
@ -260,8 +260,8 @@ int suspend_for_ptrace( struct thread *thread )
if (thread->attached)
{
send_thread_signal( thread, SIGSTOP );
wait4_thread( thread, SIGSTOP );
if (!send_thread_signal( thread, SIGSTOP )) goto error;
if (!wait4_thread( thread, SIGSTOP )) goto error;
return 1;
}
if (attach_thread( thread )) return 1;