| commit | 181e26b9fa3c85ca5a512a51278b3f22f6e64dc9 | [log] [tgz] |
|---|---|---|
| author | Russ Cox <rsc@golang.org> | Fri Apr 17 00:21:30 2015 -0400 |
| committer | Russ Cox <rsc@golang.org> | Mon Apr 20 20:20:09 2015 +0000 |
| tree | 441826cbaff52d78373d650977d3c0cfd619054a | |
| parent | c776592a4ff17b2153492bf5b17ae3151a42abf0 [diff] |
runtime: replace func-based write barrier skipping with type-based This CL revises CL 7504 to use explicitly uintptr types for the struct fields that are going to be updated sometimes without write barriers. The result is that the fields are now updated *always* without write barriers. This approach has two important properties: 1) Now the GC never looks at the field, so if the missing reference could cause a problem, it will do so all the time, not just when the write barrier is missed at just the right moment. 2) Now a write barrier never happens for the field, avoiding the (correct) detection of inconsistent write barriers when GODEBUG=wbshadow=1. Change-Id: Iebd3962c727c0046495cc08914a8dc0808460e0e Reviewed-on: https://go-review.googlesource.com/9019 Reviewed-by: Austin Clements <austin@google.com> Run-TryBot: Russ Cox <rsc@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
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