perf hists browser: Fix seg fault when annotate null symbol

PATCH In review Lin Ming 1 participant 3 messages Apr 8, 2011 – Apr 18, 2011 perf events

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Lin Ming

author

2011-04-08 06:31 UTC #0 lore raw

PATCH 1/1 perf hists browser: Fix seg fault when annotate null symbol

In hists browser, press hotkey 'a' to annotate current symbol. Now it causes segment fault if 'a' is pressed on a null symbol.

Here are 2 small bugs:
- In perf_evsel__hists_browse, the condition check after 'a' is pressed is not correct, we should check ->sym instead of ->map.
- In symbol__tui_annotate we must check whether sym is NULL or not before getting annotation structure.

This patch fixes above 2 small bugs.

Signed-off-by Lin Ming <[email protected]>

---
 tools/perf/util/ui/browsers/annotate.c |    6 ++++--
 tools/perf/util/ui/browsers/hists.c    |    2 +-
 2 files changed, 5 insertions(+), 3 deletions(-)

tools/perf/util/ui/browsers/annotate.c +4 -2

index 8c17a87..15633d6 100644
@@ -256,10 +256,9 @@ int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
 			 int refresh)
 {
 	struct objdump_line *pos, *n;
-	struct annotation *notes = symbol__annotation(sym);
+	struct annotation *notes;
 	struct annotate_browser browser = {
 		.b = {
-			.entries = &notes->src->source,
 			.refresh = ui_browser__list_head_refresh,
 			.seek	 = ui_browser__list_head_seek,
 			.write	 = annotate_browser__write,

@@ -281,6 +280,8 @@ int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
 
 	ui_helpline__push("Press <- or ESC to exit");
 
+	notes = symbol__annotation(sym);
+
 	list_for_each_entry(pos, &notes->src->source, node) {
 		struct objdump_line_rb_node *rbpos;
 		size_t line_len = strlen(pos->line);

@@ -291,6 +292,7 @@ int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
 		rbpos->idx = browser.b.nr_entries++;
 	}
 
+	browser.b.entries = &notes->src->source,
 	browser.b.width += 18; /* Percentage */
 	ret = annotate_browser__run(&browser, evidx, refresh);
 	list_for_each_entry_safe(pos, n, &notes->src->source, node) {

tools/perf/util/ui/browsers/hists.c +1 -1

index 798efdc..5d767c6 100644
@@ -851,7 +851,7 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel,
 			goto out_free_stack;
 		case 'a':
 			if (browser->selection == NULL ||
-			    browser->selection->map == NULL ||
+			    browser->selection->sym == NULL ||
 			    browser->selection->map->dso->annotate_warned)
 				continue;
 			goto do_annotate;

Lin Ming

author

2011-04-12 07:33 UTC #1 lore raw

Quoted 10 lines · Lin Ming

In hists browser, press hotkey 'a' to annotate current symbol. Now it causes segment fault if 'a' is pressed on a null symbol.
Here are 2 small bugs:
- In perf_evsel__hists_browse, the condition check after 'a' is pressed is not correct, we should check ->sym instead of ->map.
- In symbol__tui_annotate we must check whether sym is NULL or not before getting annotation structure.
This patch fixes above 2 small bugs.

Hi, Arnaldo

Could you have a look at this segment fault fix?

Thanks,
Lin Ming

Quoted 54 lines

Signed-off-by Lin Ming <[email protected]>

---
 tools/perf/util/ui/browsers/annotate.c |    6 ++++--
 tools/perf/util/ui/browsers/hists.c    |    2 +-
 2 files changed, 5 insertions(+), 3 deletions(-)

tools/perf/util/ui/browsers/annotate.c +4 -2

index 8c17a87..15633d6 100644
@@ -256,10 +256,9 @@ int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
 			 int refresh)
 {
 	struct objdump_line *pos, *n;
-	struct annotation *notes = symbol__annotation(sym);
+	struct annotation *notes;
 	struct annotate_browser browser = {
 		.b = {
-			.entries = &notes->src->source,
 			.refresh = ui_browser__list_head_refresh,
 			.seek	 = ui_browser__list_head_seek,
 			.write	 = annotate_browser__write,

@@ -281,6 +280,8 @@ int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
 
 	ui_helpline__push("Press <- or ESC to exit");
 
+	notes = symbol__annotation(sym);
+
 	list_for_each_entry(pos, &notes->src->source, node) {
 		struct objdump_line_rb_node *rbpos;
 		size_t line_len = strlen(pos->line);

@@ -291,6 +292,7 @@ int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
 		rbpos->idx = browser.b.nr_entries++;
 	}
 
+	browser.b.entries = &notes->src->source,
 	browser.b.width += 18; /* Percentage */
 	ret = annotate_browser__run(&browser, evidx, refresh);
 	list_for_each_entry_safe(pos, n, &notes->src->source, node) {

tools/perf/util/ui/browsers/hists.c +1 -1

index 798efdc..5d767c6 100644
@@ -851,7 +851,7 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel,
 			goto out_free_stack;
 		case 'a':
 			if (browser->selection == NULL ||
-			    browser->selection->map == NULL ||
+			    browser->selection->sym == NULL ||
 			    browser->selection->map->dso->annotate_warned)
 				continue;
 			goto do_annotate;

tip-bot for Lin Ming

author

2011-04-18 15:52 UTC #2 lore raw

In reply to Lin Ming

Commit-ID:  db9a9cbc8142eed008e242e389938689c6feb1ba
Gitweb:     http://git.kernel.org/tip/db9a9cbc8142eed008e242e389938689c6feb1ba
Author:     Lin Ming <[email protected]>
AuthorDate: Fri, 8 Apr 2011 14:31:26 +0800
Committer:  Arnaldo Carvalho de Melo <[email protected]>
CommitDate: Fri, 15 Apr 2011 12:51:49 -0300

perf hists browser: Fix seg fault when annotate null symbol

In hists browser, press hotkey 'a' to annotate current symbol.

Now it causes segment fault if 'a' is pressed on a null symbol.

This patch fixes above 2 small bugs.

Link http://lkml.kernel.org/r/[email protected] open here

Signed-off-by Lin Ming <[email protected]>

Signed-off-by Arnaldo Carvalho de Melo <[email protected]>

---
 tools/perf/util/ui/browsers/annotate.c |    6 ++++--
 tools/perf/util/ui/browsers/hists.c    |    2 +-
 2 files changed, 5 insertions(+), 3 deletions(-)

tools/perf/util/ui/browsers/annotate.c +4 -2

index 8c17a87..15633d6 100644
@@ -256,10 +256,9 @@ int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
 			 int refresh)
 {
 	struct objdump_line *pos, *n;
-	struct annotation *notes = symbol__annotation(sym);
+	struct annotation *notes;
 	struct annotate_browser browser = {
 		.b = {
-			.entries = &notes->src->source,
 			.refresh = ui_browser__list_head_refresh,
 			.seek	 = ui_browser__list_head_seek,
 			.write	 = annotate_browser__write,

@@ -281,6 +280,8 @@ int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
 
 	ui_helpline__push("Press <- or ESC to exit");
 
+	notes = symbol__annotation(sym);
+
 	list_for_each_entry(pos, &notes->src->source, node) {
 		struct objdump_line_rb_node *rbpos;
 		size_t line_len = strlen(pos->line);

@@ -291,6 +292,7 @@ int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
 		rbpos->idx = browser.b.nr_entries++;
 	}
 
+	browser.b.entries = &notes->src->source,
 	browser.b.width += 18; /* Percentage */
 	ret = annotate_browser__run(&browser, evidx, refresh);
 	list_for_each_entry_safe(pos, n, &notes->src->source, node) {

tools/perf/util/ui/browsers/hists.c +1 -1

index 798efdc..5d767c6 100644
@@ -851,7 +851,7 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel,
 			goto out_free_stack;
 		case 'a':
 			if (browser->selection == NULL ||
-			    browser->selection->map == NULL ||
+			    browser->selection->sym == NULL ||
 			    browser->selection->map->dso->annotate_warned)
 				continue;
 			goto do_annotate;