libsanitizer/sanitizer_common/sanitizer_netbsd.cpp

   1 //===-- sanitizer_netbsd.cpp ----------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file is shared between Sanitizer run-time libraries and implements
  10 // NetBSD-specific functions from sanitizer_libc.h.
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "sanitizer_platform.h"
  14
  15 #if SANITIZER_NETBSD
  16
  17 #include "sanitizer_common.h"
  18 #include "sanitizer_flags.h"
  19 #include "sanitizer_getauxval.h"
  20 #include "sanitizer_internal_defs.h"
  21 #include "sanitizer_libc.h"
  22 #include "sanitizer_linux.h"
  23 #include "sanitizer_mutex.h"
  24 #include "sanitizer_placement_new.h"
  25 #include "sanitizer_procmaps.h"
  26
  27 #include <sys/param.h>
  28 #include <sys/types.h>
  29
  30 #include <sys/exec.h>
  31 #include <sys/mman.h>
  32 #include <sys/ptrace.h>
  33 #include <sys/resource.h>
  34 #include <sys/stat.h>
  35 #include <sys/syscall.h>
  36 #include <sys/sysctl.h>
  37 #include <sys/time.h>
  38
  39 #include <dlfcn.h>
  40 #include <errno.h>
  41 #include <fcntl.h>
  42 #include <limits.h>
  43 #include <link.h>
  44 #include <lwp.h>
  45 #include <pthread.h>
  46 #include <sched.h>
  47 #include <signal.h>
  48 #include <ucontext.h>
  49 #include <unistd.h>
  50
  51 extern "C" void *__mmap(void *, size_t, int, int, int, int,
  52                         off_t) SANITIZER_WEAK_ATTRIBUTE;
  53 extern "C" int __sysctl(const int *, unsigned int, void *, size_t *,
  54                         const void *, size_t) SANITIZER_WEAK_ATTRIBUTE;
  55 extern "C" int _sys_close(int) SANITIZER_WEAK_ATTRIBUTE;
  56 extern "C" int _sys_open(const char *, int, ...) SANITIZER_WEAK_ATTRIBUTE;
  57 extern "C" ssize_t _sys_read(int, void *, size_t) SANITIZER_WEAK_ATTRIBUTE;
  58 extern "C" ssize_t _sys_write(int, const void *,
  59                               size_t) SANITIZER_WEAK_ATTRIBUTE;
  60 extern "C" int __ftruncate(int, int, off_t) SANITIZER_WEAK_ATTRIBUTE;
  61 extern "C" ssize_t _sys_readlink(const char *, char *,
  62                                  size_t) SANITIZER_WEAK_ATTRIBUTE;
  63 extern "C" int _sys_sched_yield() SANITIZER_WEAK_ATTRIBUTE;
  64 extern "C" int _sys___nanosleep50(const void *,
  65                                   void *) SANITIZER_WEAK_ATTRIBUTE;
  66 extern "C" int _sys_execve(const char *, char *const[],
  67                            char *const[]) SANITIZER_WEAK_ATTRIBUTE;
  68 extern "C" off_t __lseek(int, int, off_t, int) SANITIZER_WEAK_ATTRIBUTE;
  69 extern "C" int __fork() SANITIZER_WEAK_ATTRIBUTE;
  70 extern "C" int _sys___sigprocmask14(int, const void *,
  71                                     void *) SANITIZER_WEAK_ATTRIBUTE;
  72 extern "C" int _sys___wait450(int wpid, int *, int,
  73                               void *) SANITIZER_WEAK_ATTRIBUTE;
  74
  75 namespace __sanitizer {
  76
  77 static void *GetRealLibcAddress(const char *symbol) {
  78   void *real = dlsym(RTLD_NEXT, symbol);
  79   if (!real)
  80     real = dlsym(RTLD_DEFAULT, symbol);
  81   if (!real) {
  82     Printf("GetRealLibcAddress failed for symbol=%s", symbol);
  83     Die();
  84   }
  85   return real;
  86 }
  87
  88 #define _REAL(func, ...) real##_##func(__VA_ARGS__)
  89 #define DEFINE__REAL(ret_type, func, ...)                              \
  90   static ret_type (*real_##func)(__VA_ARGS__) = NULL;                  \
  91   if (!real_##func) {                                                  \
  92     real_##func = (ret_type(*)(__VA_ARGS__))GetRealLibcAddress(#func); \
  93   }                                                                    \
  94   CHECK(real_##func);
  95
  96 // --------------- sanitizer_libc.h
  97 uptr internal_mmap(void *addr, uptr length, int prot, int flags, int fd,
  98                    u64 offset) {
  99   CHECK(&__mmap);
 100   return (uptr)__mmap(addr, length, prot, flags, fd, 0, offset);
 101 }
 102
 103 uptr internal_munmap(void *addr, uptr length) {
 104   DEFINE__REAL(int, munmap, void *a, uptr b);
 105   return _REAL(munmap, addr, length);
 106 }
 107
 108 uptr internal_mremap(void *old_address, uptr old_size, uptr new_size, int flags,
 109                      void *new_address) {
 110   CHECK(false && "internal_mremap is unimplemented on NetBSD");
 111   return 0;
 112 }
 113
 114 int internal_mprotect(void *addr, uptr length, int prot) {
 115   DEFINE__REAL(int, mprotect, void *a, uptr b, int c);
 116   return _REAL(mprotect, addr, length, prot);
 117 }
 118
 119 int internal_madvise(uptr addr, uptr length, int advice) {
 120   DEFINE__REAL(int, madvise, void *a, uptr b, int c);
 121   return _REAL(madvise, (void *)addr, length, advice);
 122 }
 123
 124 uptr internal_close(fd_t fd) {
 125   CHECK(&_sys_close);
 126   return _sys_close(fd);
 127 }
 128
 129 uptr internal_open(const char *filename, int flags) {
 130   CHECK(&_sys_open);
 131   return _sys_open(filename, flags);
 132 }
 133
 134 uptr internal_open(const char *filename, int flags, u32 mode) {
 135   CHECK(&_sys_open);
 136   return _sys_open(filename, flags, mode);
 137 }
 138
 139 uptr internal_read(fd_t fd, void *buf, uptr count) {
 140   sptr res;
 141   CHECK(&_sys_read);
 142   HANDLE_EINTR(res, (sptr)_sys_read(fd, buf, (size_t)count));
 143   return res;
 144 }
 145
 146 uptr internal_write(fd_t fd, const void *buf, uptr count) {
 147   sptr res;
 148   CHECK(&_sys_write);
 149   HANDLE_EINTR(res, (sptr)_sys_write(fd, buf, count));
 150   return res;
 151 }
 152
 153 uptr internal_ftruncate(fd_t fd, uptr size) {
 154   sptr res;
 155   CHECK(&__ftruncate);
 156   HANDLE_EINTR(res, __ftruncate(fd, 0, (s64)size));
 157   return res;
 158 }
 159
 160 uptr internal_stat(const char *path, void *buf) {
 161   DEFINE__REAL(int, __stat50, const char *a, void *b);
 162   return _REAL(__stat50, path, buf);
 163 }
 164
 165 uptr internal_lstat(const char *path, void *buf) {
 166   DEFINE__REAL(int, __lstat50, const char *a, void *b);
 167   return _REAL(__lstat50, path, buf);
 168 }
 169
 170 uptr internal_fstat(fd_t fd, void *buf) {
 171   DEFINE__REAL(int, __fstat50, int a, void *b);
 172   return _REAL(__fstat50, fd, buf);
 173 }
 174
 175 uptr internal_filesize(fd_t fd) {
 176   struct stat st;
 177   if (internal_fstat(fd, &st))
 178     return -1;
 179   return (uptr)st.st_size;
 180 }
 181
 182 uptr internal_dup(int oldfd) {
 183   DEFINE__REAL(int, dup, int a);
 184   return _REAL(dup, oldfd);
 185 }
 186
 187 uptr internal_dup2(int oldfd, int newfd) {
 188   DEFINE__REAL(int, dup2, int a, int b);
 189   return _REAL(dup2, oldfd, newfd);
 190 }
 191
 192 uptr internal_readlink(const char *path, char *buf, uptr bufsize) {
 193   CHECK(&_sys_readlink);
 194   return (uptr)_sys_readlink(path, buf, bufsize);
 195 }
 196
 197 uptr internal_unlink(const char *path) {
 198   DEFINE__REAL(int, unlink, const char *a);
 199   return _REAL(unlink, path);
 200 }
 201
 202 uptr internal_rename(const char *oldpath, const char *newpath) {
 203   DEFINE__REAL(int, rename, const char *a, const char *b);
 204   return _REAL(rename, oldpath, newpath);
 205 }
 206
 207 uptr internal_sched_yield() {
 208   CHECK(&_sys_sched_yield);
 209   return _sys_sched_yield();
 210 }
 211
 212 void internal__exit(int exitcode) {
 213   DEFINE__REAL(void, _exit, int a);
 214   _REAL(_exit, exitcode);
 215   Die();  // Unreachable.
 216 }
 217
 218 void internal_usleep(u64 useconds) {
 219   struct timespec ts;
 220   ts.tv_sec = useconds / 1000000;
 221   ts.tv_nsec = (useconds % 1000000) * 1000;
 222   CHECK(&_sys___nanosleep50);
 223   _sys___nanosleep50(&ts, &ts);
 224 }
 225
 226 uptr internal_execve(const char *filename, char *const argv[],
 227                      char *const envp[]) {
 228   CHECK(&_sys_execve);
 229   return _sys_execve(filename, argv, envp);
 230 }
 231
 232 tid_t GetTid() {
 233   DEFINE__REAL(int, _lwp_self);
 234   return _REAL(_lwp_self);
 235 }
 236
 237 int TgKill(pid_t pid, tid_t tid, int sig) {
 238   DEFINE__REAL(int, _lwp_kill, int a, int b);
 239   (void)pid;
 240   return _REAL(_lwp_kill, tid, sig);
 241 }
 242
 243 u64 NanoTime() {
 244   timeval tv;
 245   DEFINE__REAL(int, __gettimeofday50, void *a, void *b);
 246   internal_memset(&tv, 0, sizeof(tv));
 247   _REAL(__gettimeofday50, &tv, 0);
 248   return (u64)tv.tv_sec * 1000 * 1000 * 1000 + tv.tv_usec * 1000;
 249 }
 250
 251 uptr internal_clock_gettime(__sanitizer_clockid_t clk_id, void *tp) {
 252   DEFINE__REAL(int, __clock_gettime50, __sanitizer_clockid_t a, void *b);
 253   return _REAL(__clock_gettime50, clk_id, tp);
 254 }
 255
 256 uptr internal_ptrace(int request, int pid, void *addr, int data) {
 257   DEFINE__REAL(int, ptrace, int a, int b, void *c, int d);
 258   return _REAL(ptrace, request, pid, addr, data);
 259 }
 260
 261 uptr internal_waitpid(int pid, int *status, int options) {
 262   CHECK(&_sys___wait450);
 263   return _sys___wait450(pid, status, options, 0 /* rusage */);
 264 }
 265
 266 uptr internal_getpid() {
 267   DEFINE__REAL(int, getpid);
 268   return _REAL(getpid);
 269 }
 270
 271 uptr internal_getppid() {
 272   DEFINE__REAL(int, getppid);
 273   return _REAL(getppid);
 274 }
 275
 276 int internal_dlinfo(void *handle, int request, void *p) {
 277   DEFINE__REAL(int, dlinfo, void *a, int b, void *c);
 278   return _REAL(dlinfo, handle, request, p);
 279 }
 280
 281 uptr internal_getdents(fd_t fd, void *dirp, unsigned int count) {
 282   DEFINE__REAL(int, __getdents30, int a, void *b, size_t c);
 283   return _REAL(__getdents30, fd, dirp, count);
 284 }
 285
 286 uptr internal_lseek(fd_t fd, OFF_T offset, int whence) {
 287   CHECK(&__lseek);
 288   return __lseek(fd, 0, offset, whence);
 289 }
 290
 291 uptr internal_prctl(int option, uptr arg2, uptr arg3, uptr arg4, uptr arg5) {
 292   Printf("internal_prctl not implemented for NetBSD");
 293   Die();
 294   return 0;
 295 }
 296
 297 uptr internal_sigaltstack(const void *ss, void *oss) {
 298   DEFINE__REAL(int, __sigaltstack14, const void *a, void *b);
 299   return _REAL(__sigaltstack14, ss, oss);
 300 }
 301
 302 int internal_fork() {
 303   CHECK(&__fork);
 304   return __fork();
 305 }
 306
 307 int internal_sysctl(const int *name, unsigned int namelen, void *oldp,
 308                     uptr *oldlenp, const void *newp, uptr newlen) {
 309   CHECK(&__sysctl);
 310   return __sysctl(name, namelen, oldp, (size_t *)oldlenp, newp, (size_t)newlen);
 311 }
 312
 313 int internal_sysctlbyname(const char *sname, void *oldp, uptr *oldlenp,
 314                           const void *newp, uptr newlen) {
 315   DEFINE__REAL(int, sysctlbyname, const char *a, void *b, size_t *c,
 316                const void *d, size_t e);
 317   return _REAL(sysctlbyname, sname, oldp, (size_t *)oldlenp, newp,
 318                (size_t)newlen);
 319 }
 320
 321 uptr internal_sigprocmask(int how, __sanitizer_sigset_t *set,
 322                           __sanitizer_sigset_t *oldset) {
 323   CHECK(&_sys___sigprocmask14);
 324   return _sys___sigprocmask14(how, set, oldset);
 325 }
 326
 327 void internal_sigfillset(__sanitizer_sigset_t *set) {
 328   DEFINE__REAL(int, __sigfillset14, const void *a);
 329   (void)_REAL(__sigfillset14, set);
 330 }
 331
 332 void internal_sigemptyset(__sanitizer_sigset_t *set) {
 333   DEFINE__REAL(int, __sigemptyset14, const void *a);
 334   (void)_REAL(__sigemptyset14, set);
 335 }
 336
 337 void internal_sigdelset(__sanitizer_sigset_t *set, int signo) {
 338   DEFINE__REAL(int, __sigdelset14, const void *a, int b);
 339   (void)_REAL(__sigdelset14, set, signo);
 340 }
 341
 342 uptr internal_clone(int (*fn)(void *), void *child_stack, int flags,
 343                     void *arg) {
 344   DEFINE__REAL(int, clone, int (*a)(void *b), void *c, int d, void *e);
 345
 346   return _REAL(clone, fn, child_stack, flags, arg);
 347 }
 348
 349 }  // namespace __sanitizer
 350
 351 #endif