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Subject[PATCH 01/42] perf tools: Support to read compressed module from build-id cache
Date
The commit c00c48fc6e6e ("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>
---
tools/perf/util/symbol-elf.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
index 06fcd1bf98b6..b24f9d8727a8 100644
--- a/tools/perf/util/symbol-elf.c
+++ b/tools/perf/util/symbol-elf.c
@@ -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)
--
2.2.2


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