linux-kernel - [patch] ptrace: make pid of child process available for PTRACE_EVENT_VFORK

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Message-ID: <200608010154_MC3-1-C6A9-2893@compuserve.com>
Date:	Tue, 1 Aug 2006 01:52:32 -0400
From:	Chuck Ebbert <76306.1226@...puserve.com>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Cc:	Andrew Morton <akpm@...l.org>, Daniel Jacobowitz <dan@...ian.org>,
	Linus Torvalds <torvalds@...l.org>,
	Albert Cahalan <acahalan@...il.com>
Subject: [patch] ptrace: make pid of child process available for
  PTRACE_EVENT_VFORK_DONE

When delivering PTRACE_EVENT_VFORK_DONE, provide pid of the child
process when tracer calls ptrace(PTRACE_GETEVENTMSG).  This is
already (accidentally) available when the tracer is tracing VFORK in
addition to VFORK_DONE.

Signed-off-by: Chuck Ebbert <76306.1226@...puserve.com>

--- 2.6.18-rc3-32.orig/kernel/fork.c
+++ 2.6.18-rc3-32/kernel/fork.c
@@ -1387,8 +1387,10 @@ long do_fork(unsigned long clone_flags,
 
 		if (clone_flags & CLONE_VFORK) {
 			wait_for_completion(&vfork);
-			if (unlikely (current->ptrace & PT_TRACE_VFORK_DONE))
+			if (unlikely (current->ptrace & PT_TRACE_VFORK_DONE)) {
+				current->ptrace_message = nr;
 				ptrace_notify ((PTRACE_EVENT_VFORK_DONE << 8) | SIGTRAP);
+			}
 		}
 	} else {
 		free_pid(pid);
-- 
Chuck
-
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