| commit | 570718fb20e426ee5091b3f512966a5913feac87 | [log] [tgz] |
|---|---|---|
| author | Devon H. O'Dell <dhobsd@google.com> | Mon Jan 07 12:11:48 2019 -0800 |
| committer | CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> | Thu Jan 10 15:42:21 2019 +0000 |
| tree | 8d31c529572d0edabd271dca2bb5b8f3ea714e7c | |
| parent | 087f9549e0d90cae40c0fe9fcc888a511fe0c64b [diff] |
[runtime] Use vdso{SP,PC} to allow pprof tracebacks for VDSO calls
When profiling, calls to the VDSO are not detected as being within the
Go process space and get reported by pprof as runtime._ExternalCode.
This was dealt with in Linux in:
https://github.com/golang/go/commit/419c06455a91c54a0552e1eb1565c397dd6fa763
When externally linking, we don't have any simple way to know where the
VDSO is loaded, and reporting runtime._VDSO isn't terribly helpful
anyway. So we piggyback on the m.vdso{SP,PC} methods to be able to trace
the functions that are actually calling into the VDSO.
Change-Id: Id3f8b03198404f49d00a2db4e14932adcbb8fd7d
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