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