diff options
| -rw-r--r-- | rts/win32/OSMem.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/rts/win32/OSMem.c b/rts/win32/OSMem.c index dd53f4d589..138660a879 100644 --- a/rts/win32/OSMem.c +++ b/rts/win32/OSMem.c @@ -50,8 +50,11 @@ allocNew(uint32_t n) { alloc_rec* rec; rec = (alloc_rec*)stgMallocBytes(sizeof(alloc_rec),"getMBlocks: allocNew"); rec->size = ((W_)n+1)*MBLOCK_SIZE; + // N.B. We use MEM_TOP_DOWN here to ensure that we leave the bottom of the + // address space available for the linker and libraries, which in general + // want to live in low memory. See #18991. rec->base = - VirtualAlloc(NULL, rec->size, MEM_RESERVE, PAGE_READWRITE); + VirtualAlloc(NULL, rec->size, MEM_RESERVE | MEM_TOP_DOWN, PAGE_READWRITE); if(rec->base==0) { stgFree((void*)rec); rec=0; |