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Issue 2364: --prof is broken
7 people starred this issue and may be notified of changes. Back to list
Status:  Assigned
Owner:  ----
Cc:  ca...@chromium.org, yurys@chromium.org


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Reported by m.presti...@gmail.com, Oct 14, 2012
I am not able to see profiling info after running mac-tick-processor v8.log.  Here is the output:
Statistical profiling result from v8.log, (0 ticks, 0 unaccounted, 0 excluded).

To build v8, I ran make native.

I noticed that https://code.google.com/p/v8/wiki/V8Profiler says there is a ENABLE_LOGGING_AND_PROFILING flag, but I didn't see the flag specified anywhere in the build documentation.

Any help?

Thanks!
Oct 15, 2012
Project Member #1 jkummerow@chromium.org
Looks like --prof is currently broken on Mac. The generated v8.log does not contain any "tick" lines.

I bisected this down to https://code.google.com/p/v8/source/detail?r=12650 (as the first bad commit). Andrey, can you take a look?
Summary: --prof is broken on Mac
Status: Assigned
Cc: ca...@chromium.org
Labels: Type-Bug OS-Mac
Oct 16, 2012
#2 Andre.E...@gmail.com
Is it only on Mac? I can confirm the same bug using ubuntu and linux-tick-processor.
Oct 17, 2012
Project Member #3 jkummerow@chromium.org
Right, as it turns out Linux is affected too.

I have reverted r12649 and r12650, now --prof works again. I'll leave this issue open until we have fixed and re-landed those changes.
Summary: --prof is broken
Labels: -OS-Mac
Oct 18, 2012
#4 maximech...@gmail.com
Confirmed on Ubuntu as well.

Chrome, y u no unit test?
Feb 8, 2013
Project Member #5 yurys@chromium.org
(No comment was entered for this change.)
Cc: yurys@chromium.org
Jun 14, 2014
#6 fuljen...@gmail.com
Having the same behavior than #2 (linux). Also ran make native to build v8.
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