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[profile] Support for GCDA profiling in Fuchsia

Authored by phosek on Mar 11 2019, 11:53 AM.



We already support instrumentation based profiling, but some clients
like Rust still use GCDA so we need to support it as well.

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phosek created this revision.Mar 11 2019, 11:53 AM
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davidxl added inline comments.Mar 12 2019, 9:29 AM

slightly prefer

#if defined(Fuchia)
// for now empty
#else /* other platforms */

Original code



This big chunk of platform specific code reduces readability. Perhaps wrap it into a helper function. You can even add new file and put all platform specific code in there (starting from Fuchia -- other platforms can follow later).

phosek updated this revision to Diff 206098.Jun 21 2019, 4:26 PM
phosek marked 2 inline comments as done.

The refactoring part looks ok. +vsk to double check.

vsk added a comment.Jun 24 2019, 10:43 AM

This looks ok to me. In the longer term, I think compiler-rt would benefit from borrowing/extending llvm's generic file interface to abstract over platform differences. It doesn't seem ideal to me that libprofile/xray etc. have lots of platform-specific file I/O code.

I'd like to split the platform specific aspects to separate files, e.g. GCDAProfilingPlatformUnix.c, GCDAProfilingPlatformWindows.c and GCDAProfilingPlatformFuchsia.c as suggested by @davidxl, but I'd rather do it in a follow up change.

vsk accepted this revision.Jun 24 2019, 1:32 PM


This revision is now accepted and ready to land.Jun 24 2019, 1:32 PM