libsanitizer/sanitizer_common/sanitizer_netbsd.cc

   1 //===-- sanitizer_netbsd.cc -----------------------------------------------===//
   2 //
   3 // This file is distributed under the University of Illinois Open Source
   4 // License. See LICENSE.TXT for details.
   5 //
   6 //===----------------------------------------------------------------------===//
   7 //
   8 // This file is shared between Sanitizer run-time libraries and implements
   9 // NetBSD-specific functions from sanitizer_libc.h.
  10 //===----------------------------------------------------------------------===//
  11
  12 #include "sanitizer_platform.h"
  13
  14 #if SANITIZER_NETBSD
  15
  16 #include "sanitizer_common.h"
  17 #include "sanitizer_flags.h"
  18 #include "sanitizer_getauxval.h"
  19 #include "sanitizer_internal_defs.h"
  20 #include "sanitizer_libc.h"
  21 #include "sanitizer_linux.h"
  22 #include "sanitizer_mutex.h"
  23 #include "sanitizer_placement_new.h"
  24 #include "sanitizer_procmaps.h"
  25
  26 #include <sys/param.h>
  27 #include <sys/types.h>
  28
  29 #include <sys/exec.h>
  30 #include <sys/mman.h>
  31 #include <sys/ptrace.h>
  32 #include <sys/resource.h>
  33 #include <sys/stat.h>
  34 #include <sys/syscall.h>
  35 #include <sys/sysctl.h>
  36 #include <sys/time.h>
  37
  38 #include <dlfcn.h>
  39 #include <errno.h>
  40 #include <fcntl.h>
  41 #include <limits.h>
  42 #include <link.h>
  43 #include <lwp.h>
  44 #include <pthread.h>
  45 #include <sched.h>
  46 #include <signal.h>
  47 #include <ucontext.h>
  48 #include <unistd.h>
  49
  50 extern "C" void *__mmap(void *, size_t, int, int, int, int,
  51                         off_t) SANITIZER_WEAK_ATTRIBUTE;
  52 extern "C" int __sysctl(const int *, unsigned int, void *, size_t *,
  53                         const void *, size_t) SANITIZER_WEAK_ATTRIBUTE;
  54 extern "C" int _sys_close(int) SANITIZER_WEAK_ATTRIBUTE;
  55 extern "C" int _sys_open(const char *, int, ...) SANITIZER_WEAK_ATTRIBUTE;
  56 extern "C" ssize_t _sys_read(int, void *, size_t) SANITIZER_WEAK_ATTRIBUTE;
  57 extern "C" ssize_t _sys_write(int, const void *,
  58                               size_t) SANITIZER_WEAK_ATTRIBUTE;
  59 extern "C" int __ftruncate(int, int, off_t) SANITIZER_WEAK_ATTRIBUTE;
  60 extern "C" ssize_t _sys_readlink(const char *, char *,
  61                                  size_t) SANITIZER_WEAK_ATTRIBUTE;
  62 extern "C" int _sys_sched_yield() SANITIZER_WEAK_ATTRIBUTE;
  63 extern "C" int _sys___nanosleep50(const void *,
  64                                   void *) SANITIZER_WEAK_ATTRIBUTE;
  65 extern "C" int _sys_execve(const char *, char *const[],
  66                            char *const[]) SANITIZER_WEAK_ATTRIBUTE;
  67 extern "C" off_t __lseek(int, int, off_t, int) SANITIZER_WEAK_ATTRIBUTE;
  68 extern "C" int __fork() SANITIZER_WEAK_ATTRIBUTE;
  69 extern "C" int _sys___sigprocmask14(int, const void *,
  70                                     void *) SANITIZER_WEAK_ATTRIBUTE;
  71 extern "C" int _sys___wait450(int wpid, int *, int,
  72                               void *) SANITIZER_WEAK_ATTRIBUTE;
  73
  74 namespace __sanitizer {
  75
  76 static void *GetRealLibcAddress(const char *symbol) {
  77   void *real = dlsym(RTLD_NEXT, symbol);
  78   if (!real)
  79     real = dlsym(RTLD_DEFAULT, symbol);
  80   if (!real) {
  81     Printf("GetRealLibcAddress failed for symbol=%s", symbol);
  82     Die();
  83   }
  84   return real;
  85 }
  86
  87 #define _REAL(func, ...) real##_##func(__VA_ARGS__)
  88 #define DEFINE__REAL(ret_type, func, ...)                              \
  89   static ret_type (*real_##func)(__VA_ARGS__) = NULL;                  \
  90   if (!real_##func) {                                                  \
  91     real_##func = (ret_type(*)(__VA_ARGS__))GetRealLibcAddress(#func); \
  92   }                                                                    \
  93   CHECK(real_##func);
  94
  95 // --------------- sanitizer_libc.h
  96 uptr internal_mmap(void *addr, uptr length, int prot, int flags, int fd,
  97                    OFF_T offset) {
  98   CHECK(&__mmap);
  99   return (uptr)__mmap(addr, length, prot, flags, fd, 0, offset);
 100 }
 101
 102 uptr internal_munmap(void *addr, uptr length) {
 103   DEFINE__REAL(int, munmap, void *a, uptr b);
 104   return _REAL(munmap, addr, length);
 105 }
 106
 107 int internal_mprotect(void *addr, uptr length, int prot) {
 108   DEFINE__REAL(int, mprotect, void *a, uptr b, int c);
 109   return _REAL(mprotect, addr, length, prot);
 110 }
 111
 112 uptr internal_close(fd_t fd) {
 113   CHECK(&_sys_close);
 114   return _sys_close(fd);
 115 }
 116
 117 uptr internal_open(const char *filename, int flags) {
 118   CHECK(&_sys_open);
 119   return _sys_open(filename, flags);
 120 }
 121
 122 uptr internal_open(const char *filename, int flags, u32 mode) {
 123   CHECK(&_sys_open);
 124   return _sys_open(filename, flags, mode);
 125 }
 126
 127 uptr internal_read(fd_t fd, void *buf, uptr count) {
 128   sptr res;
 129   CHECK(&_sys_read);
 130   HANDLE_EINTR(res, (sptr)_sys_read(fd, buf, (size_t)count));
 131   return res;
 132 }
 133
 134 uptr internal_write(fd_t fd, const void *buf, uptr count) {
 135   sptr res;
 136   CHECK(&_sys_write);
 137   HANDLE_EINTR(res, (sptr)_sys_write(fd, buf, count));
 138   return res;
 139 }
 140
 141 uptr internal_ftruncate(fd_t fd, uptr size) {
 142   sptr res;
 143   CHECK(&__ftruncate);
 144   HANDLE_EINTR(res, __ftruncate(fd, 0, (s64)size));
 145   return res;
 146 }
 147
 148 uptr internal_stat(const char *path, void *buf) {
 149   DEFINE__REAL(int, __stat50, const char *a, void *b);
 150   return _REAL(__stat50, path, buf);
 151 }
 152
 153 uptr internal_lstat(const char *path, void *buf) {
 154   DEFINE__REAL(int, __lstat50, const char *a, void *b);
 155   return _REAL(__lstat50, path, buf);
 156 }
 157
 158 uptr internal_fstat(fd_t fd, void *buf) {
 159   DEFINE__REAL(int, __fstat50, int a, void *b);
 160   return _REAL(__fstat50, fd, buf);
 161 }
 162
 163 uptr internal_filesize(fd_t fd) {
 164   struct stat st;
 165   if (internal_fstat(fd, &st))
 166     return -1;
 167   return (uptr)st.st_size;
 168 }
 169
 170 uptr internal_dup2(int oldfd, int newfd) {
 171   DEFINE__REAL(int, dup2, int a, int b);
 172   return _REAL(dup2, oldfd, newfd);
 173 }
 174
 175 uptr internal_readlink(const char *path, char *buf, uptr bufsize) {
 176   CHECK(&_sys_readlink);
 177   return (uptr)_sys_readlink(path, buf, bufsize);
 178 }
 179
 180 uptr internal_unlink(const char *path) {
 181   DEFINE__REAL(int, unlink, const char *a);
 182   return _REAL(unlink, path);
 183 }
 184
 185 uptr internal_rename(const char *oldpath, const char *newpath) {
 186   DEFINE__REAL(int, rename, const char *a, const char *b);
 187   return _REAL(rename, oldpath, newpath);
 188 }
 189
 190 uptr internal_sched_yield() {
 191   CHECK(&_sys_sched_yield);
 192   return _sys_sched_yield();
 193 }
 194
 195 void internal__exit(int exitcode) {
 196   DEFINE__REAL(void, _exit, int a);
 197   _REAL(_exit, exitcode);
 198   Die();  // Unreachable.
 199 }
 200
 201 unsigned int internal_sleep(unsigned int seconds) {
 202   struct timespec ts;
 203   ts.tv_sec = 1;
 204   ts.tv_nsec = 0;
 205   CHECK(&_sys___nanosleep50);
 206   int res = _sys___nanosleep50(&ts, &ts);
 207   if (res)
 208     return ts.tv_sec;
 209   return 0;
 210 }
 211
 212 uptr internal_execve(const char *filename, char *const argv[],
 213                      char *const envp[]) {
 214   CHECK(&_sys_execve);
 215   return _sys_execve(filename, argv, envp);
 216 }
 217
 218 tid_t GetTid() {
 219   DEFINE__REAL(int, _lwp_self);
 220   return _REAL(_lwp_self);
 221 }
 222
 223 int TgKill(pid_t pid, tid_t tid, int sig) {
 224   DEFINE__REAL(int, _lwp_kill, int a, int b);
 225   (void)pid;
 226   return _REAL(_lwp_kill, tid, sig);
 227 }
 228
 229 u64 NanoTime() {
 230   timeval tv;
 231   DEFINE__REAL(int, __gettimeofday50, void *a, void *b);
 232   internal_memset(&tv, 0, sizeof(tv));
 233   _REAL(__gettimeofday50, &tv, 0);
 234   return (u64)tv.tv_sec * 1000 * 1000 * 1000 + tv.tv_usec * 1000;
 235 }
 236
 237 uptr internal_clock_gettime(__sanitizer_clockid_t clk_id, void *tp) {
 238   DEFINE__REAL(int, __clock_gettime50, __sanitizer_clockid_t a, void *b);
 239   return _REAL(__clock_gettime50, clk_id, tp);
 240 }
 241
 242 uptr internal_ptrace(int request, int pid, void *addr, void *data) {
 243   Printf("internal_ptrace not implemented for NetBSD");
 244   Die();
 245   return 0;
 246 }
 247
 248 uptr internal_waitpid(int pid, int *status, int options) {
 249   CHECK(&_sys___wait450);
 250   return _sys___wait450(pid, status, options, 0 /* rusage */);
 251 }
 252
 253 uptr internal_getpid() {
 254   DEFINE__REAL(int, getpid);
 255   return _REAL(getpid);
 256 }
 257
 258 uptr internal_getppid() {
 259   DEFINE__REAL(int, getppid);
 260   return _REAL(getppid);
 261 }
 262
 263 uptr internal_getdents(fd_t fd, void *dirp, unsigned int count) {
 264   DEFINE__REAL(int, __getdents30, int a, void *b, size_t c);
 265   return _REAL(__getdents30, fd, dirp, count);
 266 }
 267
 268 uptr internal_lseek(fd_t fd, OFF_T offset, int whence) {
 269   CHECK(&__lseek);
 270   return __lseek(fd, 0, offset, whence);
 271 }
 272
 273 uptr internal_prctl(int option, uptr arg2, uptr arg3, uptr arg4, uptr arg5) {
 274   Printf("internal_prctl not implemented for NetBSD");
 275   Die();
 276   return 0;
 277 }
 278
 279 uptr internal_sigaltstack(const void *ss, void *oss) {
 280   DEFINE__REAL(int, __sigaltstack14, const void *a, void *b);
 281   return _REAL(__sigaltstack14, ss, oss);
 282 }
 283
 284 int internal_fork() {
 285   CHECK(&__fork);
 286   return __fork();
 287 }
 288
 289 int internal_sysctl(const int *name, unsigned int namelen, void *oldp,
 290                     uptr *oldlenp, const void *newp, uptr newlen) {
 291   CHECK(&__sysctl);
 292   return __sysctl(name, namelen, oldp, (size_t *)oldlenp, newp, (size_t)newlen);
 293 }
 294
 295 int internal_sysctlbyname(const char *sname, void *oldp, uptr *oldlenp,
 296                           const void *newp, uptr newlen) {
 297   DEFINE__REAL(int, sysctlbyname, const char *a, void *b, size_t *c,
 298                const void *d, size_t e);
 299   return _REAL(sysctlbyname, sname, oldp, (size_t *)oldlenp, newp,
 300                (size_t)newlen);
 301 }
 302
 303 uptr internal_sigprocmask(int how, __sanitizer_sigset_t *set,
 304                           __sanitizer_sigset_t *oldset) {
 305   CHECK(&_sys___sigprocmask14);
 306   return _sys___sigprocmask14(how, set, oldset);
 307 }
 308
 309 void internal_sigfillset(__sanitizer_sigset_t *set) {
 310   DEFINE__REAL(int, __sigfillset14, const void *a);
 311   (void)_REAL(__sigfillset14, set);
 312 }
 313
 314 void internal_sigemptyset(__sanitizer_sigset_t *set) {
 315   DEFINE__REAL(int, __sigemptyset14, const void *a);
 316   (void)_REAL(__sigemptyset14, set);
 317 }
 318
 319 uptr intrnal_clone(int (*fn)(void *), void *child_stack, int flags, void *arg,
 320                    int *parent_tidptr, void *newtls, int *child_tidptr) {
 321   Printf("internal_clone not implemented for NetBSD");
 322   Die();
 323   return 0;
 324 }
 325
 326 }  // namespace __sanitizer
 327
 328 #endif