gdb/gdb-rhel5-compat.patch

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Index: gdb-7.4.50.20120602/gdb/linux-nat.c
===================================================================
--- gdb-7.4.50.20120602.orig/gdb/linux-nat.c 2012-06-02 20:54:30.000000000 +0200
+++ gdb-7.4.50.20120602/gdb/linux-nat.c 2012-06-02 20:56:03.966493352 +0200
@@ -1816,8 +1816,22 @@ get_pending_status (struct lwp_info *lp,
gdb_signal_to_string (signo));
}
- if (*status == 0 && GET_PID (lp->ptid) == pid_was_stopped)
- *status = W_STOPCODE (SIGSTOP);
+ /* Workaround RHEL-5 kernel which has unreliable PTRACE_DETACH, SIGSTOP (that
+ many TIDs are left unstopped). See RH Bug 496732. */
+ if (GET_PID (lp->ptid) == pid_was_stopped)
+ {
+ int err;
+
+ errno = 0;
+ err = kill_lwp (GET_LWP (lp->ptid), SIGSTOP);
+ if (debug_linux_nat)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "SC: lwp kill %d %s\n",
+ err,
+ errno ? safe_strerror (errno) : "ERRNO-OK");
+ }
+ }
return 0;
}