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From: Namhyung Kim <namhyung@kernel.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Jiri Olsa <jolsa@kernel.org>, LKML <linux-kernel@vger.kernel.org>,
	kernel-team@lge.com, David Ahern <dsahern@gmail.com>,
	Adrian Hunter <adrian.hunter@intel.com>,
	Wang Nan <wangnan0@huawei.com>
Subject: [PATCH v4 5/9] perf tools: Decompress kernel module when reading DSO data
Date: Thu,  8 Jun 2017 16:31:05 +0900
Message-ID: <20170608073109.30699-6-namhyung@kernel.org> (raw)
In-Reply-To: <20170608073109.30699-1-namhyung@kernel.org>

Currently perf decompresses kernel modules when loading symbol table but
it missed to do it when reading raw data.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/util/dso.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index b346b8eba65c..c63525d845c5 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -475,7 +475,23 @@ static int __open_dso(struct dso *dso, struct machine *machine)
 		return -EINVAL;
 	}
 
+	if (dso__needs_decompress(dso)) {
+		char newpath[KMOD_DECOMP_LEN];
+		size_t len = sizeof(newpath);
+
+		if (dso__decompress_kmodule_path(dso, name, newpath, len) < 0) {
+			free(name);
+			return -dso->load_errno;
+		}
+
+		strcpy(name, newpath);
+	}
+
 	fd = do_open(name);
+
+	if (dso__needs_decompress(dso))
+		unlink(name);
+
 	free(name);
 	return fd;
 }
-- 
2.13.1

  parent reply index

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-06-08  7:31 [PATCHSET 0/9] perf tools: Fix for compressed kernel modules (v4) Namhyung Kim
2017-06-08  7:31 ` [PATCH v4 1/9] perf annotate: Fix symbolic link of build-id cache Namhyung Kim
2017-06-08 22:49   ` [tip:perf/urgent] " tip-bot for Namhyung Kim
2017-06-08  7:31 ` [PATCH v4 2/9] perf tools: Fix a memory leak in __open_dso() Namhyung Kim
2017-06-08 22:50   ` [tip:perf/urgent] " tip-bot for Namhyung Kim
2017-06-08  7:31 ` [PATCH v4 3/9] perf tools: Introduce dso__decompress_kmodule_{fd,path} Namhyung Kim
2017-06-08 22:50   ` [tip:perf/urgent] " tip-bot for Namhyung Kim
2017-06-08  7:31 ` [PATCH v4 4/9] perf annotate: Use dso__decompress_kmodule_path() Namhyung Kim
2017-06-08 22:51   ` [tip:perf/urgent] " tip-bot for Namhyung Kim
2017-06-08  7:31 ` Namhyung Kim [this message]
2017-06-08 22:51   ` [tip:perf/urgent] perf tools: Decompress kernel module when reading DSO data tip-bot for Namhyung Kim
2017-06-08  7:31 ` [PATCH v4 6/9] perf tools: Consolidate error path in __open_dso() Namhyung Kim
2017-06-08 22:52   ` [tip:perf/urgent] " tip-bot for Namhyung Kim
2017-06-08  7:31 ` [PATCH v4 7/9] perf test: Decompress kernel module before objdump Namhyung Kim
2017-06-08  7:34   ` Adrian Hunter
2017-06-08 22:52   ` [tip:perf/urgent] perf tests: " tip-bot for Namhyung Kim
2017-06-08  7:31 ` [PATCH v4 8/9] perf symbols: Keep DSO->symtab_type after decompress Namhyung Kim
2017-06-08 22:53   ` [tip:perf/urgent] " tip-bot for Namhyung Kim
2017-06-08  7:31 ` [PATCH v4 9/9] perf symbols: Kill dso__build_id_is_kmod() Namhyung Kim
2017-06-08 22:53   ` [tip:perf/urgent] " tip-bot for Namhyung Kim
2017-06-08 12:10 ` [PATCHSET 0/9] perf tools: Fix for compressed kernel modules (v4) Jiri Olsa

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