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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 13:14:23 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 13:14:23 +0000 |
commit | 73df946d56c74384511a194dd01dbe099584fd1a (patch) | |
tree | fd0bcea490dd81327ddfbb31e215439672c9a068 /src/runtime/mem_darwin.go | |
parent | Initial commit. (diff) | |
download | golang-1.16-73df946d56c74384511a194dd01dbe099584fd1a.tar.xz golang-1.16-73df946d56c74384511a194dd01dbe099584fd1a.zip |
Adding upstream version 1.16.10.upstream/1.16.10upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/runtime/mem_darwin.go')
-rw-r--r-- | src/runtime/mem_darwin.go | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/src/runtime/mem_darwin.go b/src/runtime/mem_darwin.go new file mode 100644 index 0000000..7fccd2b --- /dev/null +++ b/src/runtime/mem_darwin.go @@ -0,0 +1,71 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package runtime + +import ( + "unsafe" +) + +// Don't split the stack as this function may be invoked without a valid G, +// which prevents us from allocating more stack. +//go:nosplit +func sysAlloc(n uintptr, sysStat *sysMemStat) unsafe.Pointer { + v, err := mmap(nil, n, _PROT_READ|_PROT_WRITE, _MAP_ANON|_MAP_PRIVATE, -1, 0) + if err != 0 { + return nil + } + sysStat.add(int64(n)) + return v +} + +func sysUnused(v unsafe.Pointer, n uintptr) { + // MADV_FREE_REUSABLE is like MADV_FREE except it also propagates + // accounting information about the process to task_info. + madvise(v, n, _MADV_FREE_REUSABLE) +} + +func sysUsed(v unsafe.Pointer, n uintptr) { + // MADV_FREE_REUSE is necessary to keep the kernel's accounting + // accurate. If called on any memory region that hasn't been + // MADV_FREE_REUSABLE'd, it's a no-op. + madvise(v, n, _MADV_FREE_REUSE) +} + +func sysHugePage(v unsafe.Pointer, n uintptr) { +} + +// Don't split the stack as this function may be invoked without a valid G, +// which prevents us from allocating more stack. +//go:nosplit +func sysFree(v unsafe.Pointer, n uintptr, sysStat *sysMemStat) { + sysStat.add(-int64(n)) + munmap(v, n) +} + +func sysFault(v unsafe.Pointer, n uintptr) { + mmap(v, n, _PROT_NONE, _MAP_ANON|_MAP_PRIVATE|_MAP_FIXED, -1, 0) +} + +func sysReserve(v unsafe.Pointer, n uintptr) unsafe.Pointer { + p, err := mmap(v, n, _PROT_NONE, _MAP_ANON|_MAP_PRIVATE, -1, 0) + if err != 0 { + return nil + } + return p +} + +const _ENOMEM = 12 + +func sysMap(v unsafe.Pointer, n uintptr, sysStat *sysMemStat) { + sysStat.add(int64(n)) + + p, err := mmap(v, n, _PROT_READ|_PROT_WRITE, _MAP_ANON|_MAP_FIXED|_MAP_PRIVATE, -1, 0) + if err == _ENOMEM { + throw("runtime: out of memory") + } + if p != v || err != 0 { + throw("runtime: cannot map pages in arena address space") + } +} |