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
51extern "C" void *__mmap(void *, size_t, int, int, int, int,
52 off_t) SANITIZER_WEAK_ATTRIBUTE;
53extern "C" int __sysctl(const int *, unsigned int, void *, size_t *,
54 const void *, size_t) SANITIZER_WEAK_ATTRIBUTE;
55extern "C" int _sys_close(int) SANITIZER_WEAK_ATTRIBUTE;
56extern "C" int _sys_open(const char *, int, ...) SANITIZER_WEAK_ATTRIBUTE;
57extern "C" ssize_t _sys_read(int, void *, size_t) SANITIZER_WEAK_ATTRIBUTE;
58extern "C" ssize_t _sys_write(int, const void *,
59 size_t) SANITIZER_WEAK_ATTRIBUTE;
60extern "C" int __ftruncate(int, int, off_t) SANITIZER_WEAK_ATTRIBUTE;
61extern "C" ssize_t _sys_readlink(const char *, char *,
62 size_t) SANITIZER_WEAK_ATTRIBUTE;
63extern "C" int _sys_sched_yield() SANITIZER_WEAK_ATTRIBUTE;
64extern "C" int _sys___nanosleep50(const void *,
65 void *) SANITIZER_WEAK_ATTRIBUTE;
66extern "C" int _sys_execve(const char *, char *const[],
67 char *const[]) SANITIZER_WEAK_ATTRIBUTE;
68extern "C" off_t __lseek(int, int, off_t, int) SANITIZER_WEAK_ATTRIBUTE;
69extern "C" int __fork() SANITIZER_WEAK_ATTRIBUTE;
70extern "C" int _sys___sigprocmask14(int, const void *,
71 void *) SANITIZER_WEAK_ATTRIBUTE;
72extern "C" int _sys___wait450(int wpid, int *, int,
73 void *) SANITIZER_WEAK_ATTRIBUTE;
74
75namespace __sanitizer {
76
77static 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
97uptr 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
103uptr internal_munmap(void *addr, uptr length) {
104 DEFINE__REAL(int, munmap, void *a, uptr b);
105 return _REAL(munmap, addr, length);
106}
107
108uptr 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
114int 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
119int 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
124uptr internal_close(fd_t fd) {
125 CHECK(&_sys_close);
126 return _sys_close(fd);
127}
128
129uptr internal_open(const char *filename, int flags) {
130 CHECK(&_sys_open);
131 return _sys_open(filename, flags);
132}
133
134uptr internal_open(const char *filename, int flags, u32 mode) {
135 CHECK(&_sys_open);
136 return _sys_open(filename, flags, mode);
137}
138
139uptr 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
146uptr 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
153uptr 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
160uptr 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
165uptr 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
170uptr internal_fstat(fd_t fd, void *buf) {
171 DEFINE__REAL(int, __fstat50, int a, void *b);
172 return _REAL(__fstat50, fd, buf);
173}
174
175uptr 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
182uptr internal_dup(int oldfd) {
183 DEFINE__REAL(int, dup, int a);
184 return _REAL(dup, oldfd);
185}
186
187uptr internal_dup2(int oldfd, int newfd) {
188 DEFINE__REAL(int, dup2, int a, int b);
189 return _REAL(dup2, oldfd, newfd);
190}
191
192uptr internal_readlink(const char *path, char *buf, uptr bufsize) {
193 CHECK(&_sys_readlink);
194 return (uptr)_sys_readlink(path, buf, bufsize);
195}
196
197uptr internal_unlink(const char *path) {
198 DEFINE__REAL(int, unlink, const char *a);
199 return _REAL(unlink, path);
200}
201
202uptr 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
207uptr internal_sched_yield() {
208 CHECK(&_sys_sched_yield);
209 return _sys_sched_yield();
210}
211
212void internal__exit(int exitcode) {
213 DEFINE__REAL(void, _exit, int a);
214 _REAL(_exit, exitcode);
215 Die(); // Unreachable.
216}
217
218void 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
226uptr 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
232tid_t GetTid() {
233 DEFINE__REAL(int, _lwp_self);
234 return _REAL(_lwp_self);
235}
236
237int 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
243u64 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
251uptr 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
256uptr 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
261uptr internal_waitpid(int pid, int *status, int options) {
262 CHECK(&_sys___wait450);
263 return _sys___wait450(pid, status, options, 0 /* rusage */);
264}
265
266uptr internal_getpid() {
267 DEFINE__REAL(int, getpid);
268 return _REAL(getpid);
269}
270
271uptr internal_getppid() {
272 DEFINE__REAL(int, getppid);
273 return _REAL(getppid);
274}
275
276int 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
281uptr 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
286uptr internal_lseek(fd_t fd, OFF_T offset, int whence) {
287 CHECK(&__lseek);
288 return __lseek(fd, 0, offset, whence);
289}
290
291uptr 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
297uptr 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
302int internal_fork() {
303 CHECK(&__fork);
304 return __fork();
305}
306
307int 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
313int 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
321uptr 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
327void internal_sigfillset(__sanitizer_sigset_t *set) {
328 DEFINE__REAL(int, __sigfillset14, const void *a);
329 (void)_REAL(__sigfillset14, set);
330}
331
332void internal_sigemptyset(__sanitizer_sigset_t *set) {
333 DEFINE__REAL(int, __sigemptyset14, const void *a);
334 (void)_REAL(__sigemptyset14, set);
335}
336
337void 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
342uptr 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
352