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gcc_mmap.c
// Copyright 2015 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. //go:build (linux && (amd64 || arm64 || loong64 || ppc64le)) || (freebsd && amd64) #include <errno.h> #include <stdint.h> #include <stdlib.h> #include <sys/mman.h> #include "libcgo.h" uintptr_t x_cgo_mmap(void *addr, uintptr_t length, int32_t prot, int32_t flags, int32_t fd, uint32_t offset) { void *p; _cgo_tsan_acquire(); p = mmap(addr, length, prot, flags, fd, offset); _cgo_tsan_release(); if (p == MAP_FAILED) { /* This is what the Go code expects on failure. */ return (uintptr_t)errno; } return (uintptr_t)p; } void x_cgo_munmap(void *addr, uintptr_t length) { int r; _cgo_tsan_acquire(); r = munmap(addr, length); _cgo_tsan_release(); if (r < 0) { /* The Go runtime is not prepared for munmap to fail. */ abort(); } }
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