From ccd992355df7192993c666236047820244914598 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Tue, 16 Apr 2024 21:19:13 +0200 Subject: Adding upstream version 1.21.8. Signed-off-by: Daniel Baumann --- src/runtime/mem_darwin.go | 76 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 src/runtime/mem_darwin.go (limited to 'src/runtime/mem_darwin.go') diff --git a/src/runtime/mem_darwin.go b/src/runtime/mem_darwin.go new file mode 100644 index 0000000..ae84871 --- /dev/null +++ b/src/runtime/mem_darwin.go @@ -0,0 +1,76 @@ +// 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 sysAllocOS(n uintptr) unsafe.Pointer { + v, err := mmap(nil, n, _PROT_READ|_PROT_WRITE, _MAP_ANON|_MAP_PRIVATE, -1, 0) + if err != 0 { + return nil + } + return v +} + +func sysUnusedOS(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 sysUsedOS(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 sysHugePageOS(v unsafe.Pointer, n uintptr) { +} + +func sysNoHugePageOS(v unsafe.Pointer, n uintptr) { +} + +func sysHugePageCollapseOS(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 sysFreeOS(v unsafe.Pointer, n uintptr) { + munmap(v, n) +} + +func sysFaultOS(v unsafe.Pointer, n uintptr) { + mmap(v, n, _PROT_NONE, _MAP_ANON|_MAP_PRIVATE|_MAP_FIXED, -1, 0) +} + +func sysReserveOS(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 sysMapOS(v unsafe.Pointer, n uintptr) { + 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 { + print("runtime: mmap(", v, ", ", n, ") returned ", p, ", ", err, "\n") + throw("runtime: cannot map pages in arena address space") + } +} -- cgit v1.2.3