sanitizer_libc.h revision 276789
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 22namespace __sanitizer { 23 24// internal_X() is a custom implementation of X() for use in RTL. 25 26// String functions 27s64 internal_atoll(const char *nptr); 28void *internal_memchr(const void *s, int c, uptr n); 29int internal_memcmp(const void* s1, const void* s2, uptr n); 30void *internal_memcpy(void *dest, const void *src, uptr n); 31void *internal_memmove(void *dest, const void *src, uptr n); 32// Set [s, s + n) to 0. Both s and n should be 16-aligned. 33void internal_bzero_aligned16(void *s, uptr n); 34// Should not be used in performance-critical places. 35void *internal_memset(void *s, int c, uptr n); 36char* internal_strchr(const char *s, int c); 37char *internal_strchrnul(const char *s, int c); 38int internal_strcmp(const char *s1, const char *s2); 39uptr internal_strcspn(const char *s, const char *reject); 40char *internal_strdup(const char *s); 41uptr internal_strlen(const char *s); 42char *internal_strncat(char *dst, const char *src, uptr n); 43int internal_strncmp(const char *s1, const char *s2, uptr n); 44char *internal_strncpy(char *dst, const char *src, uptr n); 45uptr internal_strnlen(const char *s, uptr maxlen); 46char *internal_strrchr(const char *s, int c); 47// This is O(N^2), but we are not using it in hot places. 48char *internal_strstr(const char *haystack, const char *needle); 49// Works only for base=10 and doesn't set errno. 50s64 internal_simple_strtoll(const char *nptr, char **endptr, int base); 51int 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. 55bool mem_is_zero(const char *mem, uptr size); 56 57 58// Memory 59uptr internal_mmap(void *addr, uptr length, int prot, int flags, 60 int fd, u64 offset); 61uptr internal_munmap(void *addr, uptr length); 62 63// I/O 64const fd_t kInvalidFd = -1; 65const fd_t kStdinFd = 0; 66const fd_t kStdoutFd = 1; 67const fd_t kStderrFd = 2; 68uptr internal_close(fd_t fd); 69int internal_isatty(fd_t fd); 70 71// Use __sanitizer::OpenFile() instead. 72uptr internal_open(const char *filename, int flags); 73uptr internal_open(const char *filename, int flags, u32 mode); 74 75uptr internal_read(fd_t fd, void *buf, uptr count); 76uptr internal_write(fd_t fd, const void *buf, uptr count); 77uptr internal_ftruncate(fd_t fd, uptr size); 78 79// OS 80uptr internal_filesize(fd_t fd); // -1 on error. 81uptr internal_stat(const char *path, void *buf); 82uptr internal_lstat(const char *path, void *buf); 83uptr internal_fstat(fd_t fd, void *buf); 84uptr internal_dup2(int oldfd, int newfd); 85uptr internal_readlink(const char *path, char *buf, uptr bufsize); 86uptr internal_unlink(const char *path); 87uptr internal_rename(const char *oldpath, const char *newpath); 88void NORETURN internal__exit(int exitcode); 89uptr internal_lseek(fd_t fd, OFF_T offset, int whence); 90 91uptr internal_ptrace(int request, int pid, void *addr, void *data); 92uptr internal_waitpid(int pid, int *status, int options); 93uptr internal_getpid(); 94uptr internal_getppid(); 95 96int internal_fork(); 97 98// Threading 99uptr internal_sched_yield(); 100 101// Error handling 102bool internal_iserror(uptr retval, int *rverrno = 0); 103 104int internal_sigaction(int signum, const void *act, void *oldact); 105 106} // namespace __sanitizer 107 108#endif // SANITIZER_LIBC_H 109