diff options
Diffstat (limited to 'src/runtime/mem_windows.c')
| -rw-r--r-- | src/runtime/mem_windows.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/runtime/mem_windows.c b/src/runtime/mem_windows.c index 7bc028bf3..6ea992020 100644 --- a/src/runtime/mem_windows.c +++ b/src/runtime/mem_windows.c @@ -68,10 +68,22 @@ void runtime·SysUsed(void *v, uintptr n) { void *r; + uintptr small; r = runtime·stdcall4(runtime·VirtualAlloc, (uintptr)v, n, MEM_COMMIT, PAGE_READWRITE); if(r != v) runtime·throw("runtime: failed to commit pages"); + + // Commit failed. See SysUnused. + while(n > 0) { + small = n; + while(small >= 4096 && runtime·stdcall4(runtime·VirtualAlloc, (uintptr)v, small, MEM_COMMIT, PAGE_READWRITE) == nil) + small = (small / 2) & ~(4096-1); + if(small < 4096) + runtime·throw("runtime: failed to decommit pages"); + v = (byte*)v + small; + n -= small; + } } void |