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b667dd70 | 1 | //===-- sanitizer_rtems.cpp -----------------------------------------------===// |
eac97531 | 2 | // |
b667dd70 ML |
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 | |
eac97531 ML |
6 | // |
7 | //===----------------------------------------------------------------------===// | |
8 | // | |
9 | // This file is shared between various sanitizers' runtime libraries and | |
10 | // implements RTEMS-specific functions. | |
11 | //===----------------------------------------------------------------------===// | |
12 | ||
13 | #include "sanitizer_rtems.h" | |
14 | #if SANITIZER_RTEMS | |
15 | ||
16 | #define posix_memalign __real_posix_memalign | |
17 | #define free __real_free | |
18 | #define memset __real_memset | |
19 | ||
20 | #include "sanitizer_file.h" | |
21 | #include "sanitizer_symbolizer.h" | |
22 | #include <errno.h> | |
23 | #include <fcntl.h> | |
24 | #include <pthread.h> | |
25 | #include <sched.h> | |
26 | #include <stdio.h> | |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
29 | #include <unistd.h> | |
30 | ||
31 | // There is no mmap on RTEMS. Use memalign, etc. | |
32 | #define __mmap_alloc_aligned posix_memalign | |
33 | #define __mmap_free free | |
34 | #define __mmap_memset memset | |
35 | ||
36 | namespace __sanitizer { | |
37 | ||
38 | #include "sanitizer_syscall_generic.inc" | |
39 | ||
40 | void NORETURN internal__exit(int exitcode) { | |
41 | _exit(exitcode); | |
42 | } | |
43 | ||
44 | uptr internal_sched_yield() { | |
45 | return sched_yield(); | |
46 | } | |
47 | ||
48 | uptr internal_getpid() { | |
49 | return getpid(); | |
50 | } | |
51 | ||
3c6331c2 ML |
52 | int internal_dlinfo(void *handle, int request, void *p) { |
53 | UNIMPLEMENTED(); | |
54 | } | |
55 | ||
eac97531 ML |
56 | bool FileExists(const char *filename) { |
57 | struct stat st; | |
58 | if (stat(filename, &st)) | |
59 | return false; | |
60 | // Sanity check: filename is a regular file. | |
61 | return S_ISREG(st.st_mode); | |
62 | } | |
63 | ||
64 | uptr GetThreadSelf() { return static_cast<uptr>(pthread_self()); } | |
65 | ||
66 | tid_t GetTid() { return GetThreadSelf(); } | |
67 | ||
68 | void Abort() { abort(); } | |
69 | ||
70 | int Atexit(void (*function)(void)) { return atexit(function); } | |
71 | ||
72 | void SleepForSeconds(int seconds) { sleep(seconds); } | |
73 | ||
74 | void SleepForMillis(int millis) { usleep(millis * 1000); } | |
75 | ||
76 | bool SupportsColoredOutput(fd_t fd) { return false; } | |
77 | ||
78 | void GetThreadStackTopAndBottom(bool at_initialization, | |
79 | uptr *stack_top, uptr *stack_bottom) { | |
80 | pthread_attr_t attr; | |
81 | pthread_attr_init(&attr); | |
82 | CHECK_EQ(pthread_getattr_np(pthread_self(), &attr), 0); | |
83 | void *base = nullptr; | |
84 | size_t size = 0; | |
85 | CHECK_EQ(pthread_attr_getstack(&attr, &base, &size), 0); | |
86 | CHECK_EQ(pthread_attr_destroy(&attr), 0); | |
87 | ||
88 | *stack_bottom = reinterpret_cast<uptr>(base); | |
89 | *stack_top = *stack_bottom + size; | |
90 | } | |
91 | ||
92 | void GetThreadStackAndTls(bool main, uptr *stk_addr, uptr *stk_size, | |
93 | uptr *tls_addr, uptr *tls_size) { | |
94 | uptr stack_top, stack_bottom; | |
95 | GetThreadStackTopAndBottom(main, &stack_top, &stack_bottom); | |
96 | *stk_addr = stack_bottom; | |
97 | *stk_size = stack_top - stack_bottom; | |
98 | *tls_addr = *tls_size = 0; | |
99 | } | |
100 | ||
b667dd70 | 101 | void InitializePlatformEarly() {} |
eac97531 ML |
102 | void MaybeReexec() {} |
103 | void CheckASLR() {} | |
b667dd70 | 104 | void CheckMPROTECT() {} |
eac97531 ML |
105 | void DisableCoreDumperIfNecessary() {} |
106 | void InstallDeadlySignalHandlers(SignalHandlerType handler) {} | |
107 | void SetAlternateSignalStack() {} | |
108 | void UnsetAlternateSignalStack() {} | |
109 | void InitTlsSize() {} | |
110 | ||
111 | void PrintModuleMap() {} | |
112 | ||
113 | void SignalContext::DumpAllRegisters(void *context) {} | |
114 | const char *DescribeSignalOrException(int signo) { UNIMPLEMENTED(); } | |
115 | ||
116 | enum MutexState { MtxUnlocked = 0, MtxLocked = 1, MtxSleeping = 2 }; | |
117 | ||
118 | BlockingMutex::BlockingMutex() { | |
119 | internal_memset(this, 0, sizeof(*this)); | |
120 | } | |
121 | ||
122 | void BlockingMutex::Lock() { | |
123 | CHECK_EQ(owner_, 0); | |
124 | atomic_uint32_t *m = reinterpret_cast<atomic_uint32_t *>(&opaque_storage_); | |
125 | if (atomic_exchange(m, MtxLocked, memory_order_acquire) == MtxUnlocked) | |
126 | return; | |
127 | while (atomic_exchange(m, MtxSleeping, memory_order_acquire) != MtxUnlocked) { | |
128 | internal_sched_yield(); | |
129 | } | |
130 | } | |
131 | ||
132 | void BlockingMutex::Unlock() { | |
133 | atomic_uint32_t *m = reinterpret_cast<atomic_uint32_t *>(&opaque_storage_); | |
134 | u32 v = atomic_exchange(m, MtxUnlocked, memory_order_release); | |
135 | CHECK_NE(v, MtxUnlocked); | |
136 | } | |
137 | ||
138 | void BlockingMutex::CheckLocked() { | |
139 | atomic_uint32_t *m = reinterpret_cast<atomic_uint32_t *>(&opaque_storage_); | |
140 | CHECK_NE(MtxUnlocked, atomic_load(m, memory_order_relaxed)); | |
141 | } | |
142 | ||
143 | uptr GetPageSize() { return getpagesize(); } | |
144 | ||
145 | uptr GetMmapGranularity() { return GetPageSize(); } | |
146 | ||
147 | uptr GetMaxVirtualAddress() { | |
148 | return (1ULL << 32) - 1; // 0xffffffff | |
149 | } | |
150 | ||
151 | void *MmapOrDie(uptr size, const char *mem_type, bool raw_report) { | |
152 | void* ptr = 0; | |
153 | int res = __mmap_alloc_aligned(&ptr, GetPageSize(), size); | |
154 | if (UNLIKELY(res)) | |
155 | ReportMmapFailureAndDie(size, mem_type, "allocate", res, raw_report); | |
156 | __mmap_memset(ptr, 0, size); | |
157 | IncreaseTotalMmap(size); | |
158 | return ptr; | |
159 | } | |
160 | ||
161 | void *MmapOrDieOnFatalError(uptr size, const char *mem_type) { | |
162 | void* ptr = 0; | |
163 | int res = __mmap_alloc_aligned(&ptr, GetPageSize(), size); | |
164 | if (UNLIKELY(res)) { | |
165 | if (res == ENOMEM) | |
166 | return nullptr; | |
167 | ReportMmapFailureAndDie(size, mem_type, "allocate", false); | |
168 | } | |
169 | __mmap_memset(ptr, 0, size); | |
170 | IncreaseTotalMmap(size); | |
171 | return ptr; | |
172 | } | |
173 | ||
174 | void *MmapAlignedOrDieOnFatalError(uptr size, uptr alignment, | |
175 | const char *mem_type) { | |
176 | CHECK(IsPowerOfTwo(size)); | |
177 | CHECK(IsPowerOfTwo(alignment)); | |
178 | void* ptr = 0; | |
179 | int res = __mmap_alloc_aligned(&ptr, alignment, size); | |
180 | if (res) | |
181 | ReportMmapFailureAndDie(size, mem_type, "align allocate", res, false); | |
182 | __mmap_memset(ptr, 0, size); | |
183 | IncreaseTotalMmap(size); | |
184 | return ptr; | |
185 | } | |
186 | ||
187 | void *MmapNoReserveOrDie(uptr size, const char *mem_type) { | |
188 | return MmapOrDie(size, mem_type, false); | |
189 | } | |
190 | ||
191 | void UnmapOrDie(void *addr, uptr size) { | |
192 | if (!addr || !size) return; | |
193 | __mmap_free(addr); | |
194 | DecreaseTotalMmap(size); | |
195 | } | |
196 | ||
197 | fd_t OpenFile(const char *filename, FileAccessMode mode, error_t *errno_p) { | |
198 | int flags; | |
199 | switch (mode) { | |
200 | case RdOnly: flags = O_RDONLY; break; | |
201 | case WrOnly: flags = O_WRONLY | O_CREAT | O_TRUNC; break; | |
202 | case RdWr: flags = O_RDWR | O_CREAT; break; | |
203 | } | |
204 | fd_t res = open(filename, flags, 0660); | |
205 | if (internal_iserror(res, errno_p)) | |
206 | return kInvalidFd; | |
207 | return res; | |
208 | } | |
209 | ||
210 | void CloseFile(fd_t fd) { | |
211 | close(fd); | |
212 | } | |
213 | ||
214 | bool ReadFromFile(fd_t fd, void *buff, uptr buff_size, uptr *bytes_read, | |
215 | error_t *error_p) { | |
216 | uptr res = read(fd, buff, buff_size); | |
217 | if (internal_iserror(res, error_p)) | |
218 | return false; | |
219 | if (bytes_read) | |
220 | *bytes_read = res; | |
221 | return true; | |
222 | } | |
223 | ||
224 | bool WriteToFile(fd_t fd, const void *buff, uptr buff_size, uptr *bytes_written, | |
225 | error_t *error_p) { | |
226 | uptr res = write(fd, buff, buff_size); | |
227 | if (internal_iserror(res, error_p)) | |
228 | return false; | |
229 | if (bytes_written) | |
230 | *bytes_written = res; | |
231 | return true; | |
232 | } | |
233 | ||
eac97531 ML |
234 | void ReleaseMemoryPagesToOS(uptr beg, uptr end) {} |
235 | void DumpProcessMap() {} | |
236 | ||
237 | // There is no page protection so everything is "accessible." | |
238 | bool IsAccessibleMemoryRange(uptr beg, uptr size) { | |
239 | return true; | |
240 | } | |
241 | ||
242 | char **GetArgv() { return nullptr; } | |
b667dd70 | 243 | char **GetEnviron() { return nullptr; } |
eac97531 ML |
244 | |
245 | const char *GetEnv(const char *name) { | |
246 | return getenv(name); | |
247 | } | |
248 | ||
249 | uptr ReadBinaryName(/*out*/char *buf, uptr buf_len) { | |
250 | internal_strncpy(buf, "StubBinaryName", buf_len); | |
251 | return internal_strlen(buf); | |
252 | } | |
253 | ||
254 | uptr ReadLongProcessName(/*out*/ char *buf, uptr buf_len) { | |
255 | internal_strncpy(buf, "StubProcessName", buf_len); | |
256 | return internal_strlen(buf); | |
257 | } | |
258 | ||
259 | bool IsPathSeparator(const char c) { | |
260 | return c == '/'; | |
261 | } | |
262 | ||
263 | bool IsAbsolutePath(const char *path) { | |
264 | return path != nullptr && IsPathSeparator(path[0]); | |
265 | } | |
266 | ||
267 | void ReportFile::Write(const char *buffer, uptr length) { | |
268 | SpinMutexLock l(mu); | |
269 | static const char *kWriteError = | |
270 | "ReportFile::Write() can't output requested buffer!\n"; | |
271 | ReopenIfNecessary(); | |
272 | if (length != write(fd, buffer, length)) { | |
273 | write(fd, kWriteError, internal_strlen(kWriteError)); | |
274 | Die(); | |
275 | } | |
276 | } | |
277 | ||
278 | uptr MainThreadStackBase, MainThreadStackSize; | |
279 | uptr MainThreadTlsBase, MainThreadTlsSize; | |
280 | ||
281 | } // namespace __sanitizer | |
282 | ||
283 | #endif // SANITIZER_RTEMS |