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