xref: /aosp_15_r20/external/compiler-rt/lib/sanitizer_common/sanitizer_posix.h (revision 7c3d14c8b49c529e04be81a3ce6f5cc23712e4c6)

//===-- sanitizer_posix.h -------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file is shared between AddressSanitizer and ThreadSanitizer
// run-time libraries and declares some useful POSIX-specific functions.
//===----------------------------------------------------------------------===//
#ifndef SANITIZER_POSIX_H
#define SANITIZER_POSIX_H

// ----------- ATTENTION -------------
// This header should NOT include any other headers from sanitizer runtime.
#include "sanitizer_internal_defs.h"
#include "sanitizer_platform_limits_posix.h"

#if !SANITIZER_POSIX
// Make it hard to accidentally use any of functions declared in this file:
#error This file should only be included on POSIX
#endif

namespace __sanitizer {

// I/O
// Don't use directly, use __sanitizer::OpenFile() instead.
uptr internal_open(const char *filename, int flags);
uptr internal_open(const char *filename, int flags, u32 mode);
uptr internal_close(fd_t fd);

uptr internal_read(fd_t fd, void *buf, uptr count);
uptr internal_write(fd_t fd, const void *buf, uptr count);

// Memory
uptr internal_mmap(void *addr, uptr length, int prot, int flags,
                   int fd, OFF_T offset);
uptr internal_munmap(void *addr, uptr length);
int internal_mprotect(void *addr, uptr length, int prot);

// OS
uptr internal_filesize(fd_t fd);  // -1 on error.
uptr internal_stat(const char *path, void *buf);
uptr internal_lstat(const char *path, void *buf);
uptr internal_fstat(fd_t fd, void *buf);
uptr internal_dup2(int oldfd, int newfd);
uptr internal_readlink(const char *path, char *buf, uptr bufsize);
uptr internal_unlink(const char *path);
uptr internal_rename(const char *oldpath, const char *newpath);
uptr internal_lseek(fd_t fd, OFF_T offset, int whence);

uptr internal_ptrace(int request, int pid, void *addr, void *data);
uptr internal_waitpid(int pid, int *status, int options);

int internal_fork();
int internal_forkpty(int *amaster);

// These functions call appropriate pthread_ functions directly, bypassing
// the interceptor. They are weak and may not be present in some tools.
SANITIZER_WEAK_ATTRIBUTE
int real_pthread_create(void *th, void *attr, void *(*callback)(void *),
                        void *param);
SANITIZER_WEAK_ATTRIBUTE
int real_pthread_join(void *th, void **ret);

#define DEFINE_REAL_PTHREAD_FUNCTIONS                                          \
  namespace __sanitizer {                                                      \
  int real_pthread_create(void *th, void *attr, void *(*callback)(void *),     \
                          void *param) {                                       \
    return REAL(pthread_create)(th, attr, callback, param);                    \
  }                                                                            \
  int real_pthread_join(void *th, void **ret) {                                \
    return REAL(pthread_join(th, ret));                                        \
  }                                                                            \
  }  // namespace __sanitizer

int my_pthread_attr_getstack(void *attr, void **addr, uptr *size);

// A routine named real_sigaction() must be implemented by each sanitizer in
// order for internal_sigaction() to bypass interceptors.
int internal_sigaction(int signum, const void *act, void *oldact);
void internal_sigfillset(__sanitizer_sigset_t *set);
void internal_sigemptyset(__sanitizer_sigset_t *set);
bool internal_sigismember(__sanitizer_sigset_t *set, int signum);

uptr internal_execve(const char *filename, char *const argv[],
                     char *const envp[]);
}  // namespace __sanitizer

#endif  // SANITIZER_POSIX_H