1 //===-- sanitizer_libc.h ----------------------------------------*- C++ -*-===// 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. 12 // These tools can not use some of the libc functions directly because those 13 // functions are intercepted. Instead, we implement a tiny subset of libc here. 14 //===----------------------------------------------------------------------===// 15 #ifndef SANITIZER_LIBC_H 16 #define SANITIZER_LIBC_H 17 18 // ----------- ATTENTION ------------- 19 // This header should NOT include any other headers from sanitizer runtime. 20 #include "sanitizer_internal_defs.h" 21 22 namespace __sanitizer { 23 24 // internal_X() is a custom implementation of X() for use in RTL. 25 26 // String functions 27 s64 internal_atoll(const char *nptr); 28 void *internal_memchr(const void *s, int c, uptr n); 29 int internal_memcmp(const void* s1, const void* s2, uptr n); 30 void *internal_memcpy(void *dest, const void *src, uptr n); 31 void *internal_memmove(void *dest, const void *src, uptr n); 32 // Set [s, s + n) to 0. Both s and n should be 16-aligned. 33 void internal_bzero_aligned16(void *s, uptr n); 34 // Should not be used in performance-critical places. 35 void *internal_memset(void *s, int c, uptr n); 36 char* internal_strchr(const char *s, int c); 37 char *internal_strchrnul(const char *s, int c); 38 int internal_strcmp(const char *s1, const char *s2); 39 uptr internal_strcspn(const char *s, const char *reject); 40 char *internal_strdup(const char *s); 41 uptr internal_strlen(const char *s); 42 char *internal_strncat(char *dst, const char *src, uptr n); 43 int internal_strncmp(const char *s1, const char *s2, uptr n); 44 char *internal_strncpy(char *dst, const char *src, uptr n); 45 uptr internal_strnlen(const char *s, uptr maxlen); 46 char *internal_strrchr(const char *s, int c); 47 // This is O(N^2), but we are not using it in hot places. 48 char *internal_strstr(const char *haystack, const char *needle); 49 // Works only for base=10 and doesn't set errno. 50 s64 internal_simple_strtoll(const char *nptr, char **endptr, int base); 51 int internal_snprintf(char *buffer, uptr length, const char *format, ...); 52 53 // Return true if all bytes in [mem, mem+size) are zero. 54 // Optimized for the case when the result is true. 55 bool mem_is_zero(const char *mem, uptr size); 56 57 58 // Memory 59 uptr internal_mmap(void *addr, uptr length, int prot, int flags, 60 int fd, u64 offset); 61 uptr internal_munmap(void *addr, uptr length); 62 63 // I/O 64 const fd_t kInvalidFd = -1; 65 const fd_t kStdinFd = 0; 66 const fd_t kStdoutFd = 1; 67 const fd_t kStderrFd = 2; 68 uptr internal_close(fd_t fd); 69 int internal_isatty(fd_t fd); 70 71 // Use __sanitizer::OpenFile() instead. 72 uptr internal_open(const char *filename, int flags); 73 uptr internal_open(const char *filename, int flags, u32 mode); 74 75 uptr internal_read(fd_t fd, void *buf, uptr count); 76 uptr internal_write(fd_t fd, const void *buf, uptr count); 77 uptr internal_ftruncate(fd_t fd, uptr size); 78 79 // OS 80 uptr internal_filesize(fd_t fd); // -1 on error. 81 uptr internal_stat(const char *path, void *buf); 82 uptr internal_lstat(const char *path, void *buf); 83 uptr internal_fstat(fd_t fd, void *buf); 84 uptr internal_dup2(int oldfd, int newfd); 85 uptr internal_readlink(const char *path, char *buf, uptr bufsize); 86 uptr internal_unlink(const char *path); 87 uptr internal_rename(const char *oldpath, const char *newpath); 88 void NORETURN internal__exit(int exitcode); 89 uptr internal_lseek(fd_t fd, OFF_T offset, int whence); 90 91 uptr internal_ptrace(int request, int pid, void *addr, void *data); 92 uptr internal_waitpid(int pid, int *status, int options); 93 uptr internal_getpid(); 94 uptr internal_getppid(); 95 96 int internal_fork(); 97 98 // Threading 99 uptr internal_sched_yield(); 100 101 // Error handling 102 bool internal_iserror(uptr retval, int *rverrno = 0); 103 104 int internal_sigaction(int signum, const void *act, void *oldact); 105 106 } // namespace __sanitizer 107 108 #endif // SANITIZER_LIBC_H 109
