diff options
Diffstat (limited to 'libgo/go')
| -rw-r--r-- | libgo/go/runtime/mwbbuf.go | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/libgo/go/runtime/mwbbuf.go b/libgo/go/runtime/mwbbuf.go index 4c875ff..a27406e 100644 --- a/libgo/go/runtime/mwbbuf.go +++ b/libgo/go/runtime/mwbbuf.go @@ -285,10 +285,17 @@ func wbBufFlush1(_p_ *p) { // path to reduce the rate of flushes? continue } - obj, span, objIndex := findObject(ptr, 0, 0, false) + obj, span, objIndex := findObject(ptr, 0, 0, !usestackmaps) if obj == 0 { continue } + if span.isFree(objIndex) { + // For gccgo, it is possible that we have a write barrier + // writing to unintialized stack memory. So we could see + // a bad pointer in the write barrier buffer. Don't mark + // it in this case. + continue + } // TODO: Consider making two passes where the first // just prefetches the mark bits. mbits := span.markBitsForIndex(objIndex) |