diff options
Diffstat (limited to 'src/runtime')
| -rw-r--r-- | src/runtime/malloc.go | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/src/runtime/malloc.go b/src/runtime/malloc.go index 2759bbdaf9..cc22b0f276 100644 --- a/src/runtime/malloc.go +++ b/src/runtime/malloc.go @@ -1135,13 +1135,21 @@ func mallocgc(size uintptr, typ *_type, needzero bool) unsafe.Pointer { msanmalloc(x, size) } + if rate := MemProfileRate; rate > 0 { + // Note cache c only valid while m acquired; see #47302 + if rate != 1 && size < c.nextSample { + c.nextSample -= size + } else { + profilealloc(mp, x, size) + } + } mp.mallocing = 0 releasem(mp) // Pointerfree data can be zeroed late in a context where preemption can occur. // x will keep the memory alive. if !isZeroed && needzero { - memclrNoHeapPointersChunked(size, x) + memclrNoHeapPointersChunked(size, x) // This is a possible preemption point: see #47302 } if debug.malloc { @@ -1155,16 +1163,6 @@ func mallocgc(size uintptr, typ *_type, needzero bool) unsafe.Pointer { } } - if rate := MemProfileRate; rate > 0 { - if rate != 1 && size < c.nextSample { - c.nextSample -= size - } else { - mp := acquirem() - profilealloc(mp, x, size) - releasem(mp) - } - } - if assistG != nil { // Account for internal fragmentation in the assist // debt now that we know it. |