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perf tools: Don't try to lookup objdump for live mode

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Arnaldo reported that annotation during perf top resulted in a segfault.
It was because the env->arch was NULL and we don't set it for a live
session.  In fact, no need to look up objdump in this case since we can
use system's default (native) objdump.

Reported-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: Namhyung Kim <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Irina Tirdea <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
This commit is contained in:
Namhyung Kim 2012-11-07 10:30:15 +09:00 • committed by Arnaldo Carvalho de Melo
commit ff6f7778a6
1 changed files with 7 additions and 0 deletions
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7
tools/perf/arch/common.c
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@ -199,6 +199,13 @@ out_error:
int perf_session_env__lookup_objdump(struct perf_session_env *env)
{
/*
* For live mode, env->arch will be NULL and we can use
* the native objdump tool.
*/
if (env->arch == NULL)
return 0;
return perf_session_env__lookup_binutils_path(env, "objdump",
&objdump_path);
}