sanitizer_libc.h revision 6fb47af2d2d305adbfc3d41bea589d1527a364a9
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// Should not be used in performance-critical places. 33void *internal_memset(void *s, int c, uptr n); 34char* internal_strchr(const char *s, int c); 35int internal_strcmp(const char *s1, const char *s2); 36uptr internal_strcspn(const char *s, const char *reject); 37char *internal_strdup(const char *s); 38uptr internal_strlen(const char *s); 39char *internal_strncat(char *dst, const char *src, uptr n); 40int internal_strncmp(const char *s1, const char *s2, uptr n); 41char *internal_strncpy(char *dst, const char *src, uptr n); 42uptr internal_strnlen(const char *s, uptr maxlen); 43char *internal_strrchr(const char *s, int c); 44// This is O(N^2), but we are not using it in hot places. 45char *internal_strstr(const char *haystack, const char *needle); 46// Works only for base=10 and doesn't set errno. 47s64 internal_simple_strtoll(const char *nptr, char **endptr, int base); 48int internal_snprintf(char *buffer, uptr length, const char *format, ...); 49 50// Return true if all bytes in [mem, mem+size) are zero. 51// Optimized for the case when the result is true. 52bool mem_is_zero(const char *mem, uptr size); 53 54 55// Memory 56void *internal_mmap(void *addr, uptr length, int prot, int flags, 57 int fd, u64 offset); 58int internal_munmap(void *addr, uptr length); 59 60// I/O 61const fd_t kInvalidFd = -1; 62const fd_t kStdinFd = 0; 63const fd_t kStdoutFd = 1; 64const fd_t kStderrFd = 2; 65int internal_close(fd_t fd); 66int internal_isatty(fd_t fd); 67 68// Use __sanitizer::OpenFile() instead. 69fd_t internal_open(const char *filename, int flags); 70fd_t internal_open(const char *filename, int flags, u32 mode); 71 72uptr internal_read(fd_t fd, void *buf, uptr count); 73uptr internal_write(fd_t fd, const void *buf, uptr count); 74 75// OS 76uptr internal_filesize(fd_t fd); // -1 on error. 77int internal_stat(const char *path, void *buf); 78int internal_lstat(const char *path, void *buf); 79int internal_fstat(fd_t fd, void *buf); 80int internal_dup2(int oldfd, int newfd); 81uptr internal_readlink(const char *path, char *buf, uptr bufsize); 82void NORETURN internal__exit(int exitcode); 83OFF_T internal_lseek(fd_t fd, OFF_T offset, int whence); 84 85long internal_ptrace(int request, int pid, void *addr, void *data); 86int internal_waitpid(int pid, int *status, int options); 87int internal_getppid(); 88 89// Threading 90int internal_sched_yield(); 91 92} // namespace __sanitizer 93 94#endif // SANITIZER_LIBC_H 95