1 // Copyright 2015 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 // +build linux,amd64 6 7 #include <errno.h> 8 #include <stdint.h> 9 #include <stdlib.h> 10 #include <sys/mman.h> 11 12 #include "libcgo.h" 13 14 uintptr_t 15 x_cgo_mmap(void *addr, uintptr_t length, int32_t prot, int32_t flags, int32_t fd, uint32_t offset) { 16 void *p; 17 18 _cgo_tsan_acquire(); 19 p = mmap(addr, length, prot, flags, fd, offset); 20 _cgo_tsan_release(); 21 if (p == MAP_FAILED) { 22 /* This is what the Go code expects on failure. */ 23 return (uintptr_t)errno; 24 } 25 return (uintptr_t)p; 26 } 27 28 void 29 x_cgo_munmap(void *addr, uintptr_t length) { 30 int r; 31 32 _cgo_tsan_acquire(); 33 r = munmap(addr, length); 34 _cgo_tsan_release(); 35 if (r < 0) { 36 /* The Go runtime is not prepared for munmap to fail. */ 37 abort(); 38 } 39 } 40
