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| author | Rick Hudson <rlh@golang.org> | 2016-07-19 14:21:23 -0400 |
|---|---|---|
| committer | Rick Hudson <rlh@golang.org> | 2017-05-25 18:05:53 +0000 |
| commit | 1d4942afe0872e5f6d95cfa0a5751ef4a9dde114 (patch) | |
| tree | e3eca264c83e28557f626bc4bf619f516a9e56df /src/runtime/mheap.go | |
| parent | 8b25a00e6d889c8a919922f747791478c8bdfe6f (diff) | |
| download | go-1d4942afe0872e5f6d95cfa0a5751ef4a9dde114.tar.gz go-1d4942afe0872e5f6d95cfa0a5751ef4a9dde114.zip | |
[dev.garbage] runtime: determine if an object is publicdev.garbage
ROC (request oriented collector) needs to determine
if an object is visible to other goroutines, i.e.
public. In a later CL this will be used by the write
barrier and the publishing logic to distinguish between
local and public objects and act accordingly.
Change-Id: I6a80da9deb21f57e831a2ec04e41477f997a8c33
Reviewed-on: https://go-review.googlesource.com/25056
Reviewed-by: Austin Clements <austin@google.com>
Diffstat (limited to 'src/runtime/mheap.go')
| -rw-r--r-- | src/runtime/mheap.go | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/runtime/mheap.go b/src/runtime/mheap.go index 4cf08e46a7..09dc0d51ad 100644 --- a/src/runtime/mheap.go +++ b/src/runtime/mheap.go @@ -195,6 +195,13 @@ type mspan struct { // helps performance. nelems uintptr // number of object in the span. + // startindex is the object index where the owner G started allocating in this span. + // + // This is used in conjunction with nextUsedSpan to implement ROC checkpoints and recycles. + startindex uintptr + // nextUsedSpan links together all spans that have the same span class and owner G. + nextUsedSpan *mspan + // Cache of the allocBits at freeindex. allocCache is shifted // such that the lowest bit corresponds to the bit freeindex. // allocCache holds the complement of allocBits, thus allowing |