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perf jit: Check JITHEADER_VERSION 

Check the version number when opening a jitdump file.  Accept older
versions, but not newer ones.

Signed-off-by: Stefano Sanfilippo <ssanfilippo@chromium.org>
Signed-off-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Stephane Eranian <eranian@google.com>
Cc: Anton Blanchard <anton@ozlabs.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1476356383-30100-9-git-send-email-eranian@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
hifive-unleashed-5.1
Stefano Sanfilippo 2016-10-13 03:59:42 -07:00 committed by Arnaldo Carvalho de Melo
parent 086f9f3d78
commit 6760d77b70
1 changed files with 6 additions and 0 deletions
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6
tools/perf/util/jitdump.c
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@ -180,6 +180,12 @@ jit_open(struct jit_buf_desc *jd, const char *name)
header.elf_mach,
jd->use_arch_timestamp);
if (header.version > JITHEADER_VERSION) {
pr_err("wrong jitdump version %u, expected " STR(JITHEADER_VERSION),
header.version);
goto error;
}
if (header.flags & JITDUMP_FLAGS_RESERVED) {
pr_err("jitdump file contains invalid or unsupported flags 0x%llx\n",
(unsigned long long)header.flags & JITDUMP_FLAGS_RESERVED);