diff options
| -rw-r--r-- | src/runtime/trace2map.go | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/runtime/trace2map.go b/src/runtime/trace2map.go index 4a5a7ecba4..195ec0bbe7 100644 --- a/src/runtime/trace2map.go +++ b/src/runtime/trace2map.go @@ -141,5 +141,11 @@ func (tab *traceMap) reset() { assertLockHeld(&tab.lock) tab.mem.drop() tab.seq.Store(0) - tab.tab = [1 << 13]atomic.UnsafePointer{} + // Clear table without write barriers. The table consists entirely + // of notinheap pointers, so this is fine. + // + // Write barriers may theoretically call into the tracer and acquire + // the lock again, and this lock ordering is expressed in the static + // lock ranking checker. + memclrNoHeapPointers(unsafe.Pointer(&tab.tab), unsafe.Sizeof(tab.tab)) } |