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don't add leaf function twice to profile under libunwind

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This commit is contained in:
Aliaksey Kandratsenka 2014-08-10 19:38:07 -07:00
parent 2e5ee04889
commit 8de46e66fc
1 changed files with 11 additions and 2 deletions
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13
src/profiler.cc
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@ -356,9 +356,18 @@ void CpuProfiler::prof_handler(int sig, siginfo_t*, void* signal_ucontext,
// profile size unnecessarily.
int depth = GetStackTraceWithContext(stack + 1, arraysize(stack) - 1,
2, signal_ucontext);
depth++; // To account for pc value in stack[0];
instance->collector_.Add(depth, stack);
void **used_stack;
if (stack[1] == stack[0]) {
// in case of libunwind we will have PC in stack[1].
// We don't want this double PC entry
used_stack = stack + 1;
} else {
used_stack = stack;
depth++; // To account for pc value in stack[0];
}
instance->collector_.Add(depth, used_stack);
}
}