sanitizer_libc.h revision 280031
1238901Sandrew//===-- sanitizer_libc.h ----------------------------------------*- C++ -*-===// 2238901Sandrew// 3238901Sandrew// The LLVM Compiler Infrastructure 4238901Sandrew// 5238901Sandrew// This file is distributed under the University of Illinois Open Source 6238901Sandrew// License. See LICENSE.TXT for details. 7238901Sandrew// 8238901Sandrew//===----------------------------------------------------------------------===// 9238901Sandrew// 10238901Sandrew// This file is shared between AddressSanitizer and ThreadSanitizer 11238901Sandrew// run-time libraries. 12238901Sandrew// These tools can not use some of the libc functions directly because those 13238901Sandrew// functions are intercepted. Instead, we implement a tiny subset of libc here. 14238901Sandrew//===----------------------------------------------------------------------===// 15238901Sandrew#ifndef SANITIZER_LIBC_H 16238901Sandrew#define SANITIZER_LIBC_H 17238901Sandrew 18238901Sandrew// ----------- ATTENTION ------------- 19238901Sandrew// This header should NOT include any other headers from sanitizer runtime. 20251034Sed#include "sanitizer_internal_defs.h" 21238901Sandrew 22238901Sandrewnamespace __sanitizer { 23238901Sandrew 24238901Sandrew// internal_X() is a custom implementation of X() for use in RTL. 25238901Sandrew 26238901Sandrew// String functions 27238901Sandrews64 internal_atoll(const char *nptr); 28238901Sandrewvoid *internal_memchr(const void *s, int c, uptr n); 29280031Sdimvoid *internal_memrchr(const void *s, int c, uptr n); 30238901Sandrewint internal_memcmp(const void* s1, const void* s2, uptr n); 31238901Sandrewvoid *internal_memcpy(void *dest, const void *src, uptr n); 32245614Sandrewvoid *internal_memmove(void *dest, const void *src, uptr n); 33276789Sdim// Set [s, s + n) to 0. Both s and n should be 16-aligned. 34276789Sdimvoid internal_bzero_aligned16(void *s, uptr n); 35238901Sandrew// Should not be used in performance-critical places. 36238901Sandrewvoid *internal_memset(void *s, int c, uptr n); 37238901Sandrewchar* internal_strchr(const char *s, int c); 38274201Sdimchar *internal_strchrnul(const char *s, int c); 39238901Sandrewint internal_strcmp(const char *s1, const char *s2); 40245614Sandrewuptr internal_strcspn(const char *s, const char *reject); 41238901Sandrewchar *internal_strdup(const char *s); 42280031Sdimchar *internal_strndup(const char *s, uptr n); 43238901Sandrewuptr internal_strlen(const char *s); 44238901Sandrewchar *internal_strncat(char *dst, const char *src, uptr n); 45238901Sandrewint internal_strncmp(const char *s1, const char *s2, uptr n); 46238901Sandrewchar *internal_strncpy(char *dst, const char *src, uptr n); 47238901Sandrewuptr internal_strnlen(const char *s, uptr maxlen); 48238901Sandrewchar *internal_strrchr(const char *s, int c); 49238901Sandrew// This is O(N^2), but we are not using it in hot places. 50238901Sandrewchar *internal_strstr(const char *haystack, const char *needle); 51238901Sandrew// Works only for base=10 and doesn't set errno. 52238901Sandrews64 internal_simple_strtoll(const char *nptr, char **endptr, int base); 53251034Sedint internal_snprintf(char *buffer, uptr length, const char *format, ...); 54238901Sandrew 55245614Sandrew// Return true if all bytes in [mem, mem+size) are zero. 56245614Sandrew// Optimized for the case when the result is true. 57245614Sandrewbool mem_is_zero(const char *mem, uptr size); 58245614Sandrew 59245614Sandrew 60238901Sandrew// Memory 61251034Seduptr internal_mmap(void *addr, uptr length, int prot, int flags, 62251034Sed int fd, u64 offset); 63251034Seduptr internal_munmap(void *addr, uptr length); 64238901Sandrew 65238901Sandrew// I/O 66238901Sandrewconst fd_t kInvalidFd = -1; 67245614Sandrewconst fd_t kStdinFd = 0; 68245614Sandrewconst fd_t kStdoutFd = 1; 69245614Sandrewconst fd_t kStderrFd = 2; 70251034Seduptr internal_close(fd_t fd); 71245614Sandrewint internal_isatty(fd_t fd); 72251034Sed 73251034Sed// Use __sanitizer::OpenFile() instead. 74251034Seduptr internal_open(const char *filename, int flags); 75251034Seduptr internal_open(const char *filename, int flags, u32 mode); 76251034Sed 77238901Sandrewuptr internal_read(fd_t fd, void *buf, uptr count); 78238901Sandrewuptr internal_write(fd_t fd, const void *buf, uptr count); 79276789Sdimuptr internal_ftruncate(fd_t fd, uptr size); 80251034Sed 81251034Sed// OS 82238901Sandrewuptr internal_filesize(fd_t fd); // -1 on error. 83251034Seduptr internal_stat(const char *path, void *buf); 84251034Seduptr internal_lstat(const char *path, void *buf); 85251034Seduptr internal_fstat(fd_t fd, void *buf); 86251034Seduptr internal_dup2(int oldfd, int newfd); 87245614Sandrewuptr internal_readlink(const char *path, char *buf, uptr bufsize); 88251034Seduptr internal_unlink(const char *path); 89276789Sdimuptr internal_rename(const char *oldpath, const char *newpath); 90251034Sedvoid NORETURN internal__exit(int exitcode); 91251034Seduptr internal_lseek(fd_t fd, OFF_T offset, int whence); 92238901Sandrew 93251034Seduptr internal_ptrace(int request, int pid, void *addr, void *data); 94251034Seduptr internal_waitpid(int pid, int *status, int options); 95251034Seduptr internal_getpid(); 96251034Seduptr internal_getppid(); 97251034Sed 98276789Sdimint internal_fork(); 99276789Sdim 100238901Sandrew// Threading 101251034Seduptr internal_sched_yield(); 102238901Sandrew 103280031Sdim// These functions call appropriate pthread_ functions directly, bypassing 104280031Sdim// the interceptor. They are weak and may not be present in some tools. 105280031SdimSANITIZER_WEAK_ATTRIBUTE 106280031Sdimint real_pthread_create(void *th, void *attr, void *(*callback)(void *), 107280031Sdim void *param); 108280031SdimSANITIZER_WEAK_ATTRIBUTE 109280031Sdimint real_pthread_join(void *th, void **ret); 110280031Sdim 111280031Sdim#define DEFINE_REAL_PTHREAD_FUNCTIONS \ 112280031Sdim namespace __sanitizer { \ 113280031Sdim int real_pthread_create(void *th, void *attr, void *(*callback)(void *), \ 114280031Sdim void *param) { \ 115280031Sdim return REAL(pthread_create)(th, attr, callback, param); \ 116280031Sdim } \ 117280031Sdim int real_pthread_join(void *th, void **ret) { \ 118280031Sdim return REAL(pthread_join(th, ret)); \ 119280031Sdim } \ 120280031Sdim } // namespace __sanitizer 121280031Sdim 122251034Sed// Error handling 123251034Sedbool internal_iserror(uptr retval, int *rverrno = 0); 124251034Sed 125276789Sdimint internal_sigaction(int signum, const void *act, void *oldact); 126276789Sdim 127238901Sandrew} // namespace __sanitizer 128238901Sandrew 129238901Sandrew#endif // SANITIZER_LIBC_H 130