diff options
Diffstat (limited to 'src/runtime/mgcwork.go')
| -rw-r--r-- | src/runtime/mgcwork.go | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/runtime/mgcwork.go b/src/runtime/mgcwork.go index 4a1455c860..b18eaafba8 100644 --- a/src/runtime/mgcwork.go +++ b/src/runtime/mgcwork.go @@ -153,10 +153,18 @@ func (ww *gcWork) get() uintptr { } // dispose returns any cached pointers to the global queue. +// The buffers are being put on the full queue so that the +// write barriers will not simply reacquire them before the +// GC can inspect them. This helps reduce the mutator's +// ability to hide pointers during the concurrent mark phase. +// //go:nowritebarrier func (w *gcWork) dispose() { if wbuf := w.wbuf; wbuf != 0 { - putpartial(wbuf.ptr(), 167) + if wbuf.ptr().nobj == 0 { + throw("dispose: workbuf is empty") + } + putfull(wbuf.ptr(), 166) w.wbuf = 0 } if w.bytesMarked != 0 { |