linux-kernel - Re: [PATCH 3/4] gcov: add gcov profiling infrastructure

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Date:	Thu, 26 Feb 2009 18:33:09 +0800
From:	Li Wei <W.Li@....COM>
To:	Peter Oberparleiter <oberpar@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andi Kleen <andi@...stfloor.org>,
	Huang Ying <ying.huang@...el.com>,
	Sam Ravnborg <sam@...nborg.org>
Subject: Re: [PATCH 3/4] gcov: add gcov profiling infrastructure

On Thu, 2009-02-26 at 11:00 +0100, Peter Oberparleiter wrote:
> Since a few RCs have been released since the last gcov-kernel patch 
> post, I'll do a full re-post with a fix similar to the one you suggested 
> included.

Thanks! It would be great if ".."s in object pathnames could also be
supported in the forth coming re-post.

I have some external modules which link with object files outside their
directories. For example, a source tree looks like

  module0/main.c
  lib0/lib.c

and the Kbuild file has to use

  main-y += ../lib0/lib.o

to link in lib.c. Current gcov-kernel does not support ".." in
pathnames. Could ".."s be handled in add_node?

---
 kernel/gcov/fs.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/kernel/gcov/fs.c b/kernel/gcov/fs.c
index aab3be7..2f92955 100644
--- a/kernel/gcov/fs.c
+++ b/kernel/gcov/fs.c
@@ -500,6 +500,15 @@ static void add_node(struct gcov_info *info)
 		if (curr == next)
 			continue;
 		*next = 0;
+		if (!strcmp(curr, "."))
+			continue;
+		if (!strcmp(curr, "..")) {
+			if (parent != &root_node) {
+				parent = parent->parent;
+				continue;
+			} else
+				goto out_err;
+		}
 		node = get_child_by_name(parent, curr);
 		if (!node) {
 			node = new_node(parent, NULL, curr);
-- 
1.5.6.3

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