diff options
Diffstat (limited to 'src/pkg/runtime/mcache.c')
| -rw-r--r-- | src/pkg/runtime/mcache.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/src/pkg/runtime/mcache.c b/src/pkg/runtime/mcache.c index ae2594023..429b42541 100644 --- a/src/pkg/runtime/mcache.c +++ b/src/pkg/runtime/mcache.c @@ -10,7 +10,7 @@ #include "malloc.h" void* -MCache_Alloc(MCache *c, int32 sizeclass, uintptr size) +MCache_Alloc(MCache *c, int32 sizeclass, uintptr size, int32 zeroed) { MCacheList *l; MLink *first, *v; @@ -36,6 +36,16 @@ MCache_Alloc(MCache *c, int32 sizeclass, uintptr size) // v is zeroed except for the link pointer // that we used above; zero that. v->next = nil; + if(zeroed) { + // block is zeroed iff second word is zero ... + if(size > sizeof(uintptr) && ((uintptr*)v)[1] != 0) + runtime_memclr((byte*)v, size); + else { + // ... except for the link pointer + // that we used above; zero that. + v->next = nil; + } + } return v; } |