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Sun, 8 Apr 2018 20:39:35 -0400 From: Sasha Levin To: "stable@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: Namhyung Kim , David Ahern , Peter Zijlstra , Wang Nan , "kernel-team@lge.com" , Arnaldo Carvalho de Melo , Sasha Levin Subject: [PATCH AUTOSEL for 3.18 007/101] perf tests: Decompress kernel module before objdump Thread-Topic: [PATCH AUTOSEL for 3.18 007/101] perf tests: Decompress kernel module before objdump Thread-Index: AQHTz5qgMbTAr0z6D0ClvYueqQdzRw== Date: Mon, 9 Apr 2018 00:35:15 +0000 Message-ID: <20180409003505.164715-7-alexander.levin@microsoft.com> References: <20180409003505.164715-1-alexander.levin@microsoft.com> In-Reply-To: <20180409003505.164715-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;DM5PR2101MB1047;7:V8ixcdldFP1iwY1kXPCirAdFejueMst5FulWwklgbAOQEPIch6VhzShi8CKQUz9Jh1beU5aqSjztkDle7rps5Y7S8mBXExvQtQMjzOVt0pvOpFp2gcIKbBt5twDDk30tHZhKy+3wUNWgNa6sZL9AHdvoQL9j9VnoPzxSNysryjcgMDoFRJrybyIXKX4VB9oNNS7mlgboIIH07E4L9pEuKolSAQrN+y5MKG8dHOf8wz6mr2gH6LsI9DfoMyV9KkCG;20:8VHx6w0pHlIx+Ij0+q0DEl7wNm2fwu2YP7FZpFwwwFTyvuSdVAoKU75lAhwNKO+DEGcBSZNsHASvSpEIXfQyTOiTnp0zoNo1CRvS4gmhXJDeE+gZNcBc7wh1+ZeIu1tQT0xiDlIO12Nj6k9zd4oGSUv6Kx8cFI7pu2IoAhmYZIk= x-ms-office365-filtering-ht: Tenant X-MS-Office365-Filtering-Correlation-Id: 2ea4f945-899d-49cd-0372-08d59db25a16 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(48565401081)(5600026)(4604075)(3008032)(4534165)(4627221)(201703031133081)(201702281549075)(2017052603328)(7193020);SRVR:DM5PR2101MB1047; 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x-microsoft-antispam-message-info: ZH9mn6/inFHaSrdSoLI2fA9rWMPA1vYexWjBv0+gF4ApLd/mH47H8VWcS/b4nSmAmfKTmJ4pAxFeqnSRoRcguSc+9fLdHuOS0R6Ay6RuaRRYV0jrszNOWmvV4vA8Q+7tybEtnAixN8FJyZ3kVG8KxOpV6j0POo78+X3EMm/au8DO+mCvqi+3dCx3ieJ3u4qNbNut9kqdnOcw2a+LuVgzTV6R2+pluG0NTG0/bf/I16hBwXNL+OchbCP8S7lBcpEP8f9Yib9cZM7gTVnapNJ1Lv/upRb7AT8UNovKuS317SKBpY5Z0duqdeNfDWDmMOgZwUpinPMV3Hsd84c6DCVDo1RCqZzebZA3QGlzB2ETOoqdSS5rj6dE+4ej+ikNpScuWn1f1LQlex/vdMmF9rgb1I4E/7tCJFYy33F0D2FD664= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2ea4f945-899d-49cd-0372-08d59db25a16 X-MS-Exchange-CrossTenant-originalarrivaltime: 09 Apr 2018 00:35:15.4861 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR2101MB1047 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: From: Namhyung Kim [ Upstream commit 94df1040b1e6aacd8dec0ba3c61d7e77cd695f26 ] If a kernel modules is compressed, it should be decompressed before running objdump to parse binary data correctly. This fixes a failure of object code reading test for me. Signed-off-by: Namhyung Kim Acked-by: Adrian Hunter Acked-by: Jiri Olsa Cc: David Ahern Cc: Peter Zijlstra Cc: Wang Nan Cc: kernel-team@lge.com Link: http://lkml.kernel.org/r/20170608073109.30699-8-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Sasha Levin --- tools/perf/tests/code-reading.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/tools/perf/tests/code-reading.c b/tools/perf/tests/code-readin= g.c index 67f2d6323558..28dfd1f7f776 100644 --- a/tools/perf/tests/code-reading.c +++ b/tools/perf/tests/code-reading.c @@ -141,6 +141,8 @@ static int read_object_code(u64 addr, size_t len, u8 cp= umode, unsigned char buf2[BUFSZ]; size_t ret_len; u64 objdump_addr; + const char *objdump_name; + char decomp_name[KMOD_DECOMP_LEN]; int ret; =20 pr_debug("Reading object code for memory address: %#"PRIx64"\n", addr); @@ -202,9 +204,25 @@ static int read_object_code(u64 addr, size_t len, u8 c= pumode, state->done[state->done_cnt++] =3D al.map->start; } =20 + objdump_name =3D al.map->dso->long_name; + if (dso__needs_decompress(al.map->dso)) { + if (dso__decompress_kmodule_path(al.map->dso, objdump_name, + decomp_name, + sizeof(decomp_name)) < 0) { + pr_debug("decompression failed\n"); + return -1; + } + + objdump_name =3D decomp_name; + } + /* Read the object code using objdump */ objdump_addr =3D map__rip_2objdump(al.map, al.addr); - ret =3D read_via_objdump(al.map->dso->long_name, objdump_addr, buf2, len)= ; + ret =3D read_via_objdump(objdump_name, objdump_addr, buf2, len); + + if (dso__needs_decompress(al.map->dso)) + unlink(objdump_name); + if (ret > 0) { /* * The kernel maps are inaccurate - assume objdump is right in --=20 2.15.1