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author | Song Liu <songliubraving@fb.com> | 2019-06-20 18:44:38 -0700 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-07-28 08:27:22 +0200 |
commit | 34908ef4928ea1adeddcd6fc8abae6471dbb535d (patch) | |
tree | 2dc6d8a6261c87d00566591f6bb58761ead39c0c /tools | |
parent | 07d0858e65e42ff477158decbe9ba3c5ad9f899f (diff) | |
download | linux-stable-34908ef4928ea1adeddcd6fc8abae6471dbb535d.tar.gz linux-stable-34908ef4928ea1adeddcd6fc8abae6471dbb535d.tar.bz2 linux-stable-34908ef4928ea1adeddcd6fc8abae6471dbb535d.zip |
perf script: Assume native_arch for pipe mode
commit 9d49169c5958e429ffa6874fbef734ae7502ad65 upstream.
In pipe mode, session->header.env.arch is not populated until the events
are processed. Therefore, the following command crashes:
perf record -o - | perf script
(gdb) bt
It fails when we try to compare env.arch against uts.machine:
if (!strcmp(uts.machine, session->header.env.arch) ||
(!strcmp(uts.machine, "x86_64") &&
!strcmp(session->header.env.arch, "i386")))
native_arch = true;
In pipe mode, it is tricky to find env.arch at this stage. To keep it
simple, let's just assume native_arch is always true for pipe mode.
Reported-by: David Carrillo Cisneros <davidca@fb.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: kernel-team@fb.com
Cc: stable@vger.kernel.org #v5.1+
Fixes: 3ab481a1cfe1 ("perf script: Support insn output for normal samples")
Link: http://lkml.kernel.org/r/20190621014438.810342-1-songliubraving@fb.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools')
-rw-r--r-- | tools/perf/builtin-script.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c index 61cfd8f70989..d089eb706d18 100644 --- a/tools/perf/builtin-script.c +++ b/tools/perf/builtin-script.c @@ -3669,7 +3669,8 @@ int cmd_script(int argc, const char **argv) goto out_delete; uname(&uts); - if (!strcmp(uts.machine, session->header.env.arch) || + if (data.is_pipe || /* assume pipe_mode indicates native_arch */ + !strcmp(uts.machine, session->header.env.arch) || (!strcmp(uts.machine, "x86_64") && !strcmp(session->header.env.arch, "i386"))) native_arch = true; |