diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/runtime/mem_bsd.go | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/src/runtime/mem_bsd.go b/src/runtime/mem_bsd.go index ad23539523..4d860e7bd3 100644 --- a/src/runtime/mem_bsd.go +++ b/src/runtime/mem_bsd.go @@ -44,8 +44,18 @@ func sysFault(v unsafe.Pointer, n uintptr) { mmap(v, n, _PROT_NONE, _MAP_ANON|_MAP_PRIVATE|_MAP_FIXED, -1, 0) } +// Indicates not to reserve swap space for the mapping. +const _sunosMAP_NORESERVE = 0x40 + func sysReserve(v unsafe.Pointer, n uintptr) unsafe.Pointer { - p, err := mmap(v, n, _PROT_NONE, _MAP_ANON|_MAP_PRIVATE, -1, 0) + flags := int32(_MAP_ANON | _MAP_PRIVATE) + if GOOS == "solaris" || GOOS == "illumos" { + // Be explicit that we don't want to reserve swap space + // for PROT_NONE anonymous mappings. This avoids an issue + // wherein large mappings can cause fork to fail. + flags |= _sunosMAP_NORESERVE + } + p, err := mmap(v, n, _PROT_NONE, flags, -1, 0) if err != 0 { return nil } |