diff options
Diffstat (limited to 'src/libmach/darwin.c')
| -rw-r--r-- | src/libmach/darwin.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/src/libmach/darwin.c b/src/libmach/darwin.c index feb49c059..7ee6f7ace 100644 --- a/src/libmach/darwin.c +++ b/src/libmach/darwin.c @@ -807,8 +807,10 @@ ctlproc(int id, char *msg) // Find Mach thread for pid and suspend it. t = addpid(id, 1); - if(t == nil) + if(t == nil) { + fprint(2, "ctlproc attached: addpid: %r\n"); return -1; + } if(me(thread_suspend(t->thread)) < 0){ fprint(2, "ctlproc attached: thread_suspend: %r\n"); return -1; @@ -816,7 +818,12 @@ ctlproc(int id, char *msg) // Let ptrace tell the process to keep going: // then ptrace is out of the way and we're back in Mach land. - return ptrace(PT_CONTINUE, id, (caddr_t)1, 0); + if(ptrace(PT_CONTINUE, id, (caddr_t)1, 0) < 0) { + fprint(2, "ctlproc attached: ptrace continue: %r\n"); + return -1; + } + + return 0; } // All the other control messages require a Thread structure. |