diff options
| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2011-10-13 16:06:54 +0400 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2011-10-13 17:29:17 +0400 |
| commit | e345fa185ad805cbd3be3397b3cba32bc42ef571 (patch) | |
| tree | aa548f1267b6ecf63f22cd036c75b28a5be375f6 /tools | |
| parent | ed7e5662ddff6a60bdae830ff65547c2eeed6f9a (diff) | |
| download | linux-e345fa185ad805cbd3be3397b3cba32bc42ef571.tar.xz | |
perf top: Remove entries from entries_collapsed on decay
We were removing only when using a --sort order that needs collapsing,
while we also use it in the threaded case, causing memory corruption
because we were scribbling freed hist entries, oops.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-k16fb4jsulr7x0ixv43amb6d@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/builtin-top.c | 4 | ||||
| -rw-r--r-- | tools/perf/util/hist.c | 14 | ||||
| -rw-r--r-- | tools/perf/util/hist.h | 1 |
3 files changed, 15 insertions, 4 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index de3cb1e00f9e..e211304a0dd7 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -304,7 +304,7 @@ static void print_sym_table(void) hists__collapse_resort_threaded(&top.sym_evsel->hists); hists__output_resort_threaded(&top.sym_evsel->hists); - hists__decay_entries(&top.sym_evsel->hists); + hists__decay_entries_threaded(&top.sym_evsel->hists); hists__output_recalc_col_len(&top.sym_evsel->hists, winsize.ws_row - 3); putchar('\n'); hists__fprintf(&top.sym_evsel->hists, NULL, false, false, @@ -555,7 +555,7 @@ static void perf_top__sort_new_samples(void *arg) hists__collapse_resort_threaded(&t->sym_evsel->hists); hists__output_resort_threaded(&t->sym_evsel->hists); - hists__decay_entries(&t->sym_evsel->hists); + hists__decay_entries_threaded(&t->sym_evsel->hists); hists__output_recalc_col_len(&t->sym_evsel->hists, winsize.ws_row - 3); } diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c index 9b9d12bbdc1d..a7193c5a0422 100644 --- a/tools/perf/util/hist.c +++ b/tools/perf/util/hist.c @@ -108,7 +108,7 @@ static bool hists__decay_entry(struct hists *hists, struct hist_entry *he) return he->period == 0; } -void hists__decay_entries(struct hists *hists) +static void __hists__decay_entries(struct hists *hists, bool threaded) { struct rb_node *next = rb_first(&hists->entries); struct hist_entry *n; @@ -124,7 +124,7 @@ void hists__decay_entries(struct hists *hists) if (hists__decay_entry(hists, n) && !n->used) { rb_erase(&n->rb_node, &hists->entries); - if (sort__need_collapse) + if (sort__need_collapse || threaded) rb_erase(&n->rb_node_in, &hists->entries_collapsed); hist_entry__free(n); @@ -133,6 +133,16 @@ void hists__decay_entries(struct hists *hists) } } +void hists__decay_entries(struct hists *hists) +{ + return __hists__decay_entries(hists, false); +} + +void hists__decay_entries_threaded(struct hists *hists) +{ + return __hists__decay_entries(hists, true); +} + /* * histogram, sorted on item, collects periods */ diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h index 7416521f7fea..bcc8ab91e26f 100644 --- a/tools/perf/util/hist.h +++ b/tools/perf/util/hist.h @@ -79,6 +79,7 @@ void hists__collapse_resort(struct hists *self); void hists__collapse_resort_threaded(struct hists *hists); void hists__decay_entries(struct hists *hists); +void hists__decay_entries_threaded(struct hists *hists); void hists__output_recalc_col_len(struct hists *hists, int max_rows); void hists__inc_nr_events(struct hists *self, u32 type); |