1//===-- sanitizer_posix.h -------------------------------------------------===// 2// 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4// See https://llvm.org/LICENSE.txt for license information. 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6// 7//===----------------------------------------------------------------------===// 8// 9// This file is shared between AddressSanitizer and ThreadSanitizer 10// run-time libraries and declares some useful POSIX-specific functions. 11//===----------------------------------------------------------------------===// 12#ifndef SANITIZER_POSIX_H 13#define SANITIZER_POSIX_H 14 15// ----------- ATTENTION ------------- 16// This header should NOT include any other headers from sanitizer runtime. 17#include "sanitizer_internal_defs.h" 18#include "sanitizer_platform_limits_freebsd.h" 19#include "sanitizer_platform_limits_netbsd.h" 20#include "sanitizer_platform_limits_openbsd.h" 21#include "sanitizer_platform_limits_posix.h" 22#include "sanitizer_platform_limits_solaris.h" 23 24#if !SANITIZER_POSIX 25// Make it hard to accidentally use any of functions declared in this file: 26#error This file should only be included on POSIX 27#endif 28 29namespace __sanitizer { 30 31// I/O 32// Don't use directly, use __sanitizer::OpenFile() instead. 33uptr internal_open(const char *filename, int flags); 34uptr internal_open(const char *filename, int flags, u32 mode); 35uptr internal_close(fd_t fd); 36 37uptr internal_read(fd_t fd, void *buf, uptr count); 38uptr internal_write(fd_t fd, const void *buf, uptr count); 39 40// Memory 41uptr internal_mmap(void *addr, uptr length, int prot, int flags, 42 int fd, u64 offset); 43uptr internal_munmap(void *addr, uptr length); 44int internal_mprotect(void *addr, uptr length, int prot); 45 46// OS 47uptr internal_filesize(fd_t fd); // -1 on error. 48uptr internal_stat(const char *path, void *buf); 49uptr internal_lstat(const char *path, void *buf); 50uptr internal_fstat(fd_t fd, void *buf); 51uptr internal_dup(int oldfd); 52uptr internal_dup2(int oldfd, int newfd); 53uptr internal_readlink(const char *path, char *buf, uptr bufsize); 54uptr internal_unlink(const char *path); 55uptr internal_rename(const char *oldpath, const char *newpath); 56uptr internal_lseek(fd_t fd, OFF_T offset, int whence); 57 58#if SANITIZER_NETBSD 59uptr internal_ptrace(int request, int pid, void *addr, int data); 60#else 61uptr internal_ptrace(int request, int pid, void *addr, void *data); 62#endif 63uptr internal_waitpid(int pid, int *status, int options); 64 65int internal_fork(); 66fd_t internal_spawn(const char *argv[], pid_t *pid); 67 68int internal_sysctl(const int *name, unsigned int namelen, void *oldp, 69 uptr *oldlenp, const void *newp, uptr newlen); 70int internal_sysctlbyname(const char *sname, void *oldp, uptr *oldlenp, 71 const void *newp, uptr newlen); 72 73// These functions call appropriate pthread_ functions directly, bypassing 74// the interceptor. They are weak and may not be present in some tools. 75SANITIZER_WEAK_ATTRIBUTE 76int real_pthread_create(void *th, void *attr, void *(*callback)(void *), 77 void *param); 78SANITIZER_WEAK_ATTRIBUTE 79int real_pthread_join(void *th, void **ret); 80 81#define DEFINE_REAL_PTHREAD_FUNCTIONS \ 82 namespace __sanitizer { \ 83 int real_pthread_create(void *th, void *attr, void *(*callback)(void *), \ 84 void *param) { \ 85 return REAL(pthread_create)(th, attr, callback, param); \ 86 } \ 87 int real_pthread_join(void *th, void **ret) { \ 88 return REAL(pthread_join(th, ret)); \ 89 } \ 90 } // namespace __sanitizer 91 92int my_pthread_attr_getstack(void *attr, void **addr, uptr *size); 93 94// A routine named real_sigaction() must be implemented by each sanitizer in 95// order for internal_sigaction() to bypass interceptors. 96int internal_sigaction(int signum, const void *act, void *oldact); 97void internal_sigfillset(__sanitizer_sigset_t *set); 98void internal_sigemptyset(__sanitizer_sigset_t *set); 99bool internal_sigismember(__sanitizer_sigset_t *set, int signum); 100 101uptr internal_execve(const char *filename, char *const argv[], 102 char *const envp[]); 103 104bool IsStateDetached(int state); 105 106// Move the fd out of {0, 1, 2} range. 107fd_t ReserveStandardFds(fd_t fd); 108 109bool ShouldMockFailureToOpen(const char *path); 110 111// Create a non-file mapping with a given /proc/self/maps name. 112uptr MmapNamed(void *addr, uptr length, int prot, int flags, const char *name); 113 114// Platforms should implement at most one of these. 115// 1. Provide a pre-decorated file descriptor to use instead of an anonymous 116// mapping. 117int GetNamedMappingFd(const char *name, uptr size, int *flags); 118// 2. Add name to an existing anonymous mapping. The caller must keep *name 119// alive at least as long as the mapping exists. 120void DecorateMapping(uptr addr, uptr size, const char *name); 121 122 123} // namespace __sanitizer 124 125#endif // SANITIZER_POSIX_H 126