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perf dso: Fix use before NULL check introduced by map__dso() introduction 

James Clark noticed that the recent 63df0e4bc3 ("perf map: Add
accessor for dso") patch accessed map->dso before the 'map' variable was
NULL checked, which is a change in logic that leads to segmentation
faults, so comb thru that patch to fix similar cases.

Fixes: 63df0e4bc3 ("perf map: Add accessor for dso")
Acked-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/lkml/ZD68RYCVT8hqPuxr@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2023-04-18 12:46:02 -03:00
parent b550bc90bb
commit 3ad1be6fae
3 changed files with 6 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
tools/perf/builtin-script.c
View File

@ -1075,8 +1075,7 @@ static int grab_bb(u8 *buffer, u64 start, u64 end,
return 0;
}
dso = map__dso(al.map);
if (!thread__find_map(thread, *cpumode, start, &al) || !dso) {
if (!thread__find_map(thread, *cpumode, start, &al) || (dso = map__dso(al.map)) == NULL) {
pr_debug("\tcannot resolve %" PRIx64 "-%" PRIx64 "\n", start, end);
return 0;
}
@ -1106,9 +1105,9 @@ static int map__fprintf_srccode(struct map *map, u64 addr, FILE *fp, struct srcc
unsigned line;
int len;
char *srccode;
struct dso *dso = map__dso(map);
struct dso *dso;
if (!map || !dso)
if (!map || (dso = map__dso(map)) == NULL)
return 0;
srcfile = get_srcline_split(dso,
map__rip_2objdump(map, addr),

4
tools/perf/ui/browsers/hists.c
View File

@ -2499,9 +2499,9 @@ add_annotate_opt(struct hist_browser *browser __maybe_unused,
struct map_symbol *ms,
u64 addr)
{
struct dso *dso = map__dso(ms->map);
struct dso *dso;
if (!ms->map || !dso || dso->annotate_warned)
if (!ms->map || (dso = map__dso(ms->map)) == NULL || dso->annotate_warned)
return 0;
if (!ms->sym)

2
tools/perf/util/sort.c
View File

@ -1568,7 +1568,7 @@ static int hist_entry__dcacheline_snprintf(struct hist_entry *he, char *bf,
if (he->mem_info) {
struct map *map = he->mem_info->daddr.ms.map;
struct dso *dso = map__dso(map);
struct dso *dso = map ? map__dso(map) : NULL;
addr = cl_address(he->mem_info->daddr.al_addr, chk_double_cl);
ms = &he->mem_info->daddr.ms;