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authorArnaldo Carvalho de Melo <acme@redhat.com>2012-03-28 12:49:35 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2012-03-29 17:13:45 -0300
commit64c17be4ffb8d6971051aec77ca1de4cfadb166d (patch)
tree5ab8ca0b28f6d780c5a3962d395ccb6413201645 /tools
parentcc96aa7a7f2e9a1a3cf8be3720f185f2d13fe34b (diff)
downloadlinux-64c17be4ffb8d6971051aec77ca1de4cfadb166d.tar.gz
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')
-rw-r--r--tools/perf/util/annotate.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 31ba2a20c0f..199f69ec656 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;