diff options
| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2012-03-28 19:49:35 +0400 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2012-03-30 00:13:45 +0400 |
| commit | 64c17be4ffb8d6971051aec77ca1de4cfadb166d (patch) | |
| tree | 5ab8ca0b28f6d780c5a3962d395ccb6413201645 /tools/perf | |
| parent | cc96aa7a7f2e9a1a3cf8be3720f185f2d13fe34b (diff) | |
| download | linux-64c17be4ffb8d6971051aec77ca1de4cfadb166d.tar.xz | |
perf annotate: Fix off by one symbol hist size allocation and hit accounting
We were not noticing it because symbol__inc_addr_samples was erroneously
dropping samples that hit the last byte in a function.
Working on a fix for a problem reported by David Miller, Stephane
Eranian and Sorin Dumitru, where addresses < sym->start were causing
problems, I noticed this other problem.
Cc: David Ahern <dsahern@gmail.com>
Cc: David Miller <davem@davemloft.net>
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: Sorin Dumitru <dumitru.sorin87@gmail.com>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-pqjaq4cr1xs2xen73pjhbav4@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/util/annotate.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c index 31ba2a20c0fb..199f69ec656f 100644 --- a/tools/perf/util/annotate.c +++ b/tools/perf/util/annotate.c @@ -28,8 +28,8 @@ int symbol__annotate_init(struct map *map __used, struct symbol *sym) int symbol__alloc_hist(struct symbol *sym) { struct annotation *notes = symbol__annotation(sym); - size_t sizeof_sym_hist = (sizeof(struct sym_hist) + - (sym->end - sym->start) * sizeof(u64)); + const size_t size = sym->end - sym->start + 1; + size_t sizeof_sym_hist = (sizeof(struct sym_hist) + size * sizeof(u64)); notes->src = zalloc(sizeof(*notes->src) + symbol_conf.nr_events * sizeof_sym_hist); if (notes->src == NULL) @@ -64,7 +64,7 @@ int symbol__inc_addr_samples(struct symbol *sym, struct map *map, pr_debug3("%s: addr=%#" PRIx64 "\n", __func__, map->unmap_ip(map, addr)); - if (addr >= sym->end) + if (addr > sym->end) return 0; offset = addr - sym->start; |