diff options
Diffstat (limited to 'src/runtime/malloc.go')
| -rw-r--r-- | src/runtime/malloc.go | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/runtime/malloc.go b/src/runtime/malloc.go index 5872a3752e..37d3a1eea1 100644 --- a/src/runtime/malloc.go +++ b/src/runtime/malloc.go @@ -657,6 +657,14 @@ func mallocgc(size uintptr, typ *_type, flags uint32) unsafe.Pointer { } else { c.local_scan += typ.ptrdata } + + // Ensure that the stores above that initialize x to + // type-safe memory and set the heap bits occur before + // the caller can make x observable to the garbage + // collector. Otherwise, on weakly ordered machines, + // the garbage collector could follow a pointer to x, + // but see uninitialized memory or stale heap bits. + publicationBarrier() } // GCmarkterminate allocates black |