Date: Thu, 29 Apr 2010 19:06:17 +0000 From: Gunnar Hinriksson <tomtinn@gmail.com> To: freebsd-hackers@freebsd.org Subject: Ptrace segfault Message-ID: <q2vcbb19c781004291206sc54fdb6ag53c3a763ad364e8e@mail.gmail.com>
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Hello
Im having a little problem using ptrace on my system.
If I use ptrace to attach to another process the child process
segfaults once I detach.
For example using this simple program.
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/ptrace.h>
#include <sys/wait.h>
int main(int argc, char *argv[])
{
int pid = atoi(argv[1]);
ptrace(PT_ATTACH, pid, 0, 0);
wait(NULL);
ptrace(PT_DETACH, pid, 0, 0);
return 0;
}
Am I using ptrace incorrectly or is there perhaps a bug in ptrace that
causes the child to always segfault ?
With Regards
Gunnar
FreeBSD knut 8.0-RELEASE-p2 FreeBSD 8.0-RELEASE-p2 #0: Tue Apr 27
04:36:16 UTC 2010 gunnar@knut:/usr/obj/usr/src/sys/GENERIC amd64
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