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perf symbols: Support to read compressed module from build-id cache 

The commit c00c48fc6e ("perf symbols: Preparation for compressed
kernel module support") added support for compressed kernel modules but
it only supports system path DSOs.  When a dso is read from build-id
cache, its filename doesn't end with ".gz" but has build-id.  In this
case, we should fallback to the original dso->name.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1422518843-25818-2-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2015-01-29 17:06:42 +09:00 committed by Arnaldo Carvalho de Melo
parent 62e503b7ed
commit 0b064f4300
1 changed files with 8 additions and 5 deletions
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13
tools/perf/util/symbol-elf.c
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@ -574,13 +574,16 @@ static int decompress_kmodule(struct dso *dso, const char *name,
const char *ext = strrchr(name, '.');
char tmpbuf[] = "/tmp/perf-kmod-XXXXXX";
if ((type != DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP &&
type != DSO_BINARY_TYPE__GUEST_KMODULE_COMP) ||
type != dso->symtab_type)
if (type != DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP &&
type != DSO_BINARY_TYPE__GUEST_KMODULE_COMP &&
type != DSO_BINARY_TYPE__BUILD_ID_CACHE)
return -1;
if (!ext || !is_supported_compression(ext + 1))
return -1;
if (!ext || !is_supported_compression(ext + 1)) {
ext = strrchr(dso->name, '.');
if (!ext || !is_supported_compression(ext + 1))
return -1;
}
fd = mkstemp(tmpbuf);
if (fd < 0)