linux-kernel - [tip:perfcounters/core] perf annotate: Fixes for filename:line displays

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Date:	Sat, 13 Jun 2009 15:54:30 GMT
From:	tip-bot for Frederic Weisbecker <fweisbec@...il.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, paulus@...ba.org, hpa@...or.com,
	mingo@...hat.com, a.p.zijlstra@...llo.nl, efault@....de,
	fweisbec@...il.com, tglx@...utronix.de, mingo@...e.hu
Subject: [tip:perfcounters/core] perf annotate: Fixes for filename:line displays

Commit-ID:  c17c2db1f3cea41c3543025905d3582c6937dd95
Gitweb:     http://git.kernel.org/tip/c17c2db1f3cea41c3543025905d3582c6937dd95
Author:     Frederic Weisbecker <fweisbec@...il.com>
AuthorDate: Sat, 13 Jun 2009 17:39:23 +0200
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Sat, 13 Jun 2009 17:51:00 +0200

perf annotate: Fixes for filename:line displays

- fix addr2line on userspace binary: don't only check kernel image.
- fix string allocation size for path: missing ending null char room
- fix overflow in symbol extra info

Reported-by: Ingo Molnar <mingo@...e.hu>
Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Mike Galbraith <efault@....de>
Cc: Paul Mackerras <paulus@...ba.org>
LKML-Reference: <1244907563-7820-1-git-send-email-fweisbec@...il.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 tools/perf/builtin-annotate.c |   11 ++++++-----
 1 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 7a5b278..94cea67 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -1116,7 +1116,7 @@ parse_line(FILE *file, struct symbol *sym, __u64 start, __u64 len)
 		if (offset < len)
 			hits = sym->hist[offset];
 
-		if (sym_ext) {
+		if (offset < len && sym_ext) {
 			path = sym_ext[offset].path;
 			percent = sym_ext[offset].percent;
 		} else if (sym->hist_sum)
@@ -1190,7 +1190,8 @@ static void free_source_line(struct symbol *sym, int len)
 }
 
 /* Get the filename:line for the colored entries */
-static void get_source_line(struct symbol *sym, __u64 start, int len)
+static void
+get_source_line(struct symbol *sym, __u64 start, int len, char *filename)
 {
 	int i;
 	char cmd[PATH_MAX * 2];
@@ -1216,7 +1217,7 @@ static void get_source_line(struct symbol *sym, __u64 start, int len)
 			continue;
 
 		offset = start + i;
-		sprintf(cmd, "addr2line -e %s %016llx", vmlinux, offset);
+		sprintf(cmd, "addr2line -e %s %016llx", filename, offset);
 		fp = popen(cmd, "r");
 		if (!fp)
 			continue;
@@ -1224,7 +1225,7 @@ static void get_source_line(struct symbol *sym, __u64 start, int len)
 		if (getline(&path, &line_len, fp) < 0 || !line_len)
 			goto next;
 
-		sym_ext[i].path = malloc(sizeof(char) * line_len);
+		sym_ext[i].path = malloc(sizeof(char) * line_len + 1);
 		if (!sym_ext[i].path)
 			goto next;
 
@@ -1285,7 +1286,7 @@ static void annotate_sym(struct dso *dso, struct symbol *sym)
 	len = sym->end - sym->start;
 
 	if (print_line) {
-		get_source_line(sym, start, len);
+		get_source_line(sym, start, len, filename);
 		print_summary(filename);
 	}
 
--
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