1 //===-- sanitizer_fuchsia.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 AddressSanitizer and other sanitizer
10 // run-time libraries and implements Fuchsia-specific functions from
11 // sanitizer_common.h.
12 //===----------------------------------------------------------------------===//
13
14 #include "sanitizer_fuchsia.h"
15 #if SANITIZER_FUCHSIA
16
17 #include <pthread.h>
18 #include <stdlib.h>
19 #include <unistd.h>
20 #include <zircon/errors.h>
21 #include <zircon/process.h>
22 #include <zircon/syscalls.h>
23 #include <zircon/utc.h>
24
25 #include "sanitizer_common.h"
26 #include "sanitizer_libc.h"
27 #include "sanitizer_mutex.h"
28
29 namespace __sanitizer {
30
internal__exit(int exitcode)31 void NORETURN internal__exit(int exitcode) { _zx_process_exit(exitcode); }
32
internal_sched_yield()33 uptr internal_sched_yield() {
34 zx_status_t status = _zx_nanosleep(0);
35 CHECK_EQ(status, ZX_OK);
36 return 0; // Why doesn't this return void?
37 }
38
internal_usleep(u64 useconds)39 void internal_usleep(u64 useconds) {
40 zx_status_t status = _zx_nanosleep(_zx_deadline_after(ZX_USEC(useconds)));
41 CHECK_EQ(status, ZX_OK);
42 }
43
NanoTime()44 u64 NanoTime() {
45 zx_handle_t utc_clock = _zx_utc_reference_get();
46 CHECK_NE(utc_clock, ZX_HANDLE_INVALID);
47 zx_time_t time;
48 zx_status_t status = _zx_clock_read(utc_clock, &time);
49 CHECK_EQ(status, ZX_OK);
50 return time;
51 }
52
MonotonicNanoTime()53 u64 MonotonicNanoTime() { return _zx_clock_get_monotonic(); }
54
internal_getpid()55 uptr internal_getpid() {
56 zx_info_handle_basic_t info;
57 zx_status_t status =
58 _zx_object_get_info(_zx_process_self(), ZX_INFO_HANDLE_BASIC, &info,
59 sizeof(info), NULL, NULL);
60 CHECK_EQ(status, ZX_OK);
61 uptr pid = static_cast<uptr>(info.koid);
62 CHECK_EQ(pid, info.koid);
63 return pid;
64 }
65
internal_dlinfo(void * handle,int request,void * p)66 int internal_dlinfo(void *handle, int request, void *p) { UNIMPLEMENTED(); }
67
GetThreadSelf()68 uptr GetThreadSelf() { return reinterpret_cast<uptr>(thrd_current()); }
69
GetTid()70 tid_t GetTid() { return GetThreadSelf(); }
71
Abort()72 void Abort() { abort(); }
73
Atexit(void (* function)(void))74 int Atexit(void (*function)(void)) { return atexit(function); }
75
GetThreadStackTopAndBottom(bool,uptr * stack_top,uptr * stack_bottom)76 void GetThreadStackTopAndBottom(bool, uptr *stack_top, uptr *stack_bottom) {
77 pthread_attr_t attr;
78 CHECK_EQ(pthread_getattr_np(pthread_self(), &attr), 0);
79 void *base;
80 size_t size;
81 CHECK_EQ(pthread_attr_getstack(&attr, &base, &size), 0);
82 CHECK_EQ(pthread_attr_destroy(&attr), 0);
83
84 *stack_bottom = reinterpret_cast<uptr>(base);
85 *stack_top = *stack_bottom + size;
86 }
87
InitializePlatformEarly()88 void InitializePlatformEarly() {}
MaybeReexec()89 void MaybeReexec() {}
CheckASLR()90 void CheckASLR() {}
CheckMPROTECT()91 void CheckMPROTECT() {}
PlatformPrepareForSandboxing(__sanitizer_sandbox_arguments * args)92 void PlatformPrepareForSandboxing(__sanitizer_sandbox_arguments *args) {}
DisableCoreDumperIfNecessary()93 void DisableCoreDumperIfNecessary() {}
InstallDeadlySignalHandlers(SignalHandlerType handler)94 void InstallDeadlySignalHandlers(SignalHandlerType handler) {}
SetAlternateSignalStack()95 void SetAlternateSignalStack() {}
UnsetAlternateSignalStack()96 void UnsetAlternateSignalStack() {}
InitTlsSize()97 void InitTlsSize() {}
98
IsStackOverflow() const99 bool SignalContext::IsStackOverflow() const { return false; }
DumpAllRegisters(void * context)100 void SignalContext::DumpAllRegisters(void *context) { UNIMPLEMENTED(); }
Describe() const101 const char *SignalContext::Describe() const { UNIMPLEMENTED(); }
102
FutexWait(atomic_uint32_t * p,u32 cmp)103 void FutexWait(atomic_uint32_t *p, u32 cmp) {
104 zx_status_t status = _zx_futex_wait(reinterpret_cast<zx_futex_t *>(p), cmp,
105 ZX_HANDLE_INVALID, ZX_TIME_INFINITE);
106 if (status != ZX_ERR_BAD_STATE) // Normal race.
107 CHECK_EQ(status, ZX_OK);
108 }
109
FutexWake(atomic_uint32_t * p,u32 count)110 void FutexWake(atomic_uint32_t *p, u32 count) {
111 zx_status_t status = _zx_futex_wake(reinterpret_cast<zx_futex_t *>(p), count);
112 CHECK_EQ(status, ZX_OK);
113 }
114
115 enum MutexState : int { MtxUnlocked = 0, MtxLocked = 1, MtxSleeping = 2 };
116
BlockingMutex()117 BlockingMutex::BlockingMutex() {
118 // NOTE! It's important that this use internal_memset, because plain
119 // memset might be intercepted (e.g., actually be __asan_memset).
120 // Defining this so the compiler initializes each field, e.g.:
121 // BlockingMutex::BlockingMutex() : BlockingMutex(LINKER_INITIALIZED) {}
122 // might result in the compiler generating a call to memset, which would
123 // have the same problem.
124 internal_memset(this, 0, sizeof(*this));
125 }
126
Lock()127 void BlockingMutex::Lock() {
128 CHECK_EQ(owner_, 0);
129 atomic_uint32_t *m = reinterpret_cast<atomic_uint32_t *>(&opaque_storage_);
130 if (atomic_exchange(m, MtxLocked, memory_order_acquire) == MtxUnlocked)
131 return;
132 while (atomic_exchange(m, MtxSleeping, memory_order_acquire) != MtxUnlocked) {
133 zx_status_t status =
134 _zx_futex_wait(reinterpret_cast<zx_futex_t *>(m), MtxSleeping,
135 ZX_HANDLE_INVALID, ZX_TIME_INFINITE);
136 if (status != ZX_ERR_BAD_STATE) // Normal race.
137 CHECK_EQ(status, ZX_OK);
138 }
139 }
140
Unlock()141 void BlockingMutex::Unlock() {
142 atomic_uint32_t *m = reinterpret_cast<atomic_uint32_t *>(&opaque_storage_);
143 u32 v = atomic_exchange(m, MtxUnlocked, memory_order_release);
144 CHECK_NE(v, MtxUnlocked);
145 if (v == MtxSleeping) {
146 zx_status_t status = _zx_futex_wake(reinterpret_cast<zx_futex_t *>(m), 1);
147 CHECK_EQ(status, ZX_OK);
148 }
149 }
150
CheckLocked() const151 void BlockingMutex::CheckLocked() const {
152 auto m = reinterpret_cast<atomic_uint32_t const *>(&opaque_storage_);
153 CHECK_NE(MtxUnlocked, atomic_load(m, memory_order_relaxed));
154 }
155
GetPageSize()156 uptr GetPageSize() { return _zx_system_get_page_size(); }
157
GetMmapGranularity()158 uptr GetMmapGranularity() { return _zx_system_get_page_size(); }
159
160 sanitizer_shadow_bounds_t ShadowBounds;
161
InitShadowBounds()162 void InitShadowBounds() { ShadowBounds = __sanitizer_shadow_bounds(); }
163
GetMaxUserVirtualAddress()164 uptr GetMaxUserVirtualAddress() {
165 InitShadowBounds();
166 return ShadowBounds.memory_limit - 1;
167 }
168
GetMaxVirtualAddress()169 uptr GetMaxVirtualAddress() { return GetMaxUserVirtualAddress(); }
170
DoAnonymousMmapOrDie(uptr size,const char * mem_type,bool raw_report,bool die_for_nomem)171 static void *DoAnonymousMmapOrDie(uptr size, const char *mem_type,
172 bool raw_report, bool die_for_nomem) {
173 size = RoundUpTo(size, GetPageSize());
174
175 zx_handle_t vmo;
176 zx_status_t status = _zx_vmo_create(size, 0, &vmo);
177 if (status != ZX_OK) {
178 if (status != ZX_ERR_NO_MEMORY || die_for_nomem)
179 ReportMmapFailureAndDie(size, mem_type, "zx_vmo_create", status,
180 raw_report);
181 return nullptr;
182 }
183 _zx_object_set_property(vmo, ZX_PROP_NAME, mem_type,
184 internal_strlen(mem_type));
185
186 // TODO(mcgrathr): Maybe allocate a VMAR for all sanitizer heap and use that?
187 uintptr_t addr;
188 status =
189 _zx_vmar_map(_zx_vmar_root_self(), ZX_VM_PERM_READ | ZX_VM_PERM_WRITE, 0,
190 vmo, 0, size, &addr);
191 _zx_handle_close(vmo);
192
193 if (status != ZX_OK) {
194 if (status != ZX_ERR_NO_MEMORY || die_for_nomem)
195 ReportMmapFailureAndDie(size, mem_type, "zx_vmar_map", status,
196 raw_report);
197 return nullptr;
198 }
199
200 IncreaseTotalMmap(size);
201
202 return reinterpret_cast<void *>(addr);
203 }
204
MmapOrDie(uptr size,const char * mem_type,bool raw_report)205 void *MmapOrDie(uptr size, const char *mem_type, bool raw_report) {
206 return DoAnonymousMmapOrDie(size, mem_type, raw_report, true);
207 }
208
MmapNoReserveOrDie(uptr size,const char * mem_type)209 void *MmapNoReserveOrDie(uptr size, const char *mem_type) {
210 return MmapOrDie(size, mem_type);
211 }
212
MmapOrDieOnFatalError(uptr size,const char * mem_type)213 void *MmapOrDieOnFatalError(uptr size, const char *mem_type) {
214 return DoAnonymousMmapOrDie(size, mem_type, false, false);
215 }
216
Init(uptr init_size,const char * name,uptr fixed_addr)217 uptr ReservedAddressRange::Init(uptr init_size, const char *name,
218 uptr fixed_addr) {
219 init_size = RoundUpTo(init_size, GetPageSize());
220 DCHECK_EQ(os_handle_, ZX_HANDLE_INVALID);
221 uintptr_t base;
222 zx_handle_t vmar;
223 zx_status_t status = _zx_vmar_allocate(
224 _zx_vmar_root_self(),
225 ZX_VM_CAN_MAP_READ | ZX_VM_CAN_MAP_WRITE | ZX_VM_CAN_MAP_SPECIFIC, 0,
226 init_size, &vmar, &base);
227 if (status != ZX_OK)
228 ReportMmapFailureAndDie(init_size, name, "zx_vmar_allocate", status);
229 base_ = reinterpret_cast<void *>(base);
230 size_ = init_size;
231 name_ = name;
232 os_handle_ = vmar;
233
234 return reinterpret_cast<uptr>(base_);
235 }
236
DoMmapFixedOrDie(zx_handle_t vmar,uptr fixed_addr,uptr map_size,void * base,const char * name,bool die_for_nomem)237 static uptr DoMmapFixedOrDie(zx_handle_t vmar, uptr fixed_addr, uptr map_size,
238 void *base, const char *name, bool die_for_nomem) {
239 uptr offset = fixed_addr - reinterpret_cast<uptr>(base);
240 map_size = RoundUpTo(map_size, GetPageSize());
241 zx_handle_t vmo;
242 zx_status_t status = _zx_vmo_create(map_size, 0, &vmo);
243 if (status != ZX_OK) {
244 if (status != ZX_ERR_NO_MEMORY || die_for_nomem)
245 ReportMmapFailureAndDie(map_size, name, "zx_vmo_create", status);
246 return 0;
247 }
248 _zx_object_set_property(vmo, ZX_PROP_NAME, name, internal_strlen(name));
249 DCHECK_GE(base + size_, map_size + offset);
250 uintptr_t addr;
251
252 status =
253 _zx_vmar_map(vmar, ZX_VM_PERM_READ | ZX_VM_PERM_WRITE | ZX_VM_SPECIFIC,
254 offset, vmo, 0, map_size, &addr);
255 _zx_handle_close(vmo);
256 if (status != ZX_OK) {
257 if (status != ZX_ERR_NO_MEMORY || die_for_nomem) {
258 ReportMmapFailureAndDie(map_size, name, "zx_vmar_map", status);
259 }
260 return 0;
261 }
262 IncreaseTotalMmap(map_size);
263 return addr;
264 }
265
Map(uptr fixed_addr,uptr map_size,const char * name)266 uptr ReservedAddressRange::Map(uptr fixed_addr, uptr map_size,
267 const char *name) {
268 return DoMmapFixedOrDie(os_handle_, fixed_addr, map_size, base_, name_,
269 false);
270 }
271
MapOrDie(uptr fixed_addr,uptr map_size,const char * name)272 uptr ReservedAddressRange::MapOrDie(uptr fixed_addr, uptr map_size,
273 const char *name) {
274 return DoMmapFixedOrDie(os_handle_, fixed_addr, map_size, base_, name_, true);
275 }
276
UnmapOrDieVmar(void * addr,uptr size,zx_handle_t target_vmar)277 void UnmapOrDieVmar(void *addr, uptr size, zx_handle_t target_vmar) {
278 if (!addr || !size)
279 return;
280 size = RoundUpTo(size, GetPageSize());
281
282 zx_status_t status =
283 _zx_vmar_unmap(target_vmar, reinterpret_cast<uintptr_t>(addr), size);
284 if (status != ZX_OK) {
285 Report("ERROR: %s failed to deallocate 0x%zx (%zd) bytes at address %p\n",
286 SanitizerToolName, size, size, addr);
287 CHECK("unable to unmap" && 0);
288 }
289
290 DecreaseTotalMmap(size);
291 }
292
Unmap(uptr addr,uptr size)293 void ReservedAddressRange::Unmap(uptr addr, uptr size) {
294 CHECK_LE(size, size_);
295 const zx_handle_t vmar = static_cast<zx_handle_t>(os_handle_);
296 if (addr == reinterpret_cast<uptr>(base_)) {
297 if (size == size_) {
298 // Destroying the vmar effectively unmaps the whole mapping.
299 _zx_vmar_destroy(vmar);
300 _zx_handle_close(vmar);
301 os_handle_ = static_cast<uptr>(ZX_HANDLE_INVALID);
302 DecreaseTotalMmap(size);
303 return;
304 }
305 } else {
306 CHECK_EQ(addr + size, reinterpret_cast<uptr>(base_) + size_);
307 }
308 // Partial unmapping does not affect the fact that the initial range is still
309 // reserved, and the resulting unmapped memory can't be reused.
310 UnmapOrDieVmar(reinterpret_cast<void *>(addr), size, vmar);
311 }
312
313 // This should never be called.
MmapFixedNoAccess(uptr fixed_addr,uptr size,const char * name)314 void *MmapFixedNoAccess(uptr fixed_addr, uptr size, const char *name) {
315 UNIMPLEMENTED();
316 }
317
MmapAlignedOrDieOnFatalError(uptr size,uptr alignment,const char * mem_type)318 void *MmapAlignedOrDieOnFatalError(uptr size, uptr alignment,
319 const char *mem_type) {
320 CHECK_GE(size, GetPageSize());
321 CHECK(IsPowerOfTwo(size));
322 CHECK(IsPowerOfTwo(alignment));
323
324 zx_handle_t vmo;
325 zx_status_t status = _zx_vmo_create(size, 0, &vmo);
326 if (status != ZX_OK) {
327 if (status != ZX_ERR_NO_MEMORY)
328 ReportMmapFailureAndDie(size, mem_type, "zx_vmo_create", status, false);
329 return nullptr;
330 }
331 _zx_object_set_property(vmo, ZX_PROP_NAME, mem_type,
332 internal_strlen(mem_type));
333
334 // TODO(mcgrathr): Maybe allocate a VMAR for all sanitizer heap and use that?
335
336 // Map a larger size to get a chunk of address space big enough that
337 // it surely contains an aligned region of the requested size. Then
338 // overwrite the aligned middle portion with a mapping from the
339 // beginning of the VMO, and unmap the excess before and after.
340 size_t map_size = size + alignment;
341 uintptr_t addr;
342 status =
343 _zx_vmar_map(_zx_vmar_root_self(), ZX_VM_PERM_READ | ZX_VM_PERM_WRITE, 0,
344 vmo, 0, map_size, &addr);
345 if (status == ZX_OK) {
346 uintptr_t map_addr = addr;
347 uintptr_t map_end = map_addr + map_size;
348 addr = RoundUpTo(map_addr, alignment);
349 uintptr_t end = addr + size;
350 if (addr != map_addr) {
351 zx_info_vmar_t info;
352 status = _zx_object_get_info(_zx_vmar_root_self(), ZX_INFO_VMAR, &info,
353 sizeof(info), NULL, NULL);
354 if (status == ZX_OK) {
355 uintptr_t new_addr;
356 status = _zx_vmar_map(
357 _zx_vmar_root_self(),
358 ZX_VM_PERM_READ | ZX_VM_PERM_WRITE | ZX_VM_SPECIFIC_OVERWRITE,
359 addr - info.base, vmo, 0, size, &new_addr);
360 if (status == ZX_OK)
361 CHECK_EQ(new_addr, addr);
362 }
363 }
364 if (status == ZX_OK && addr != map_addr)
365 status = _zx_vmar_unmap(_zx_vmar_root_self(), map_addr, addr - map_addr);
366 if (status == ZX_OK && end != map_end)
367 status = _zx_vmar_unmap(_zx_vmar_root_self(), end, map_end - end);
368 }
369 _zx_handle_close(vmo);
370
371 if (status != ZX_OK) {
372 if (status != ZX_ERR_NO_MEMORY)
373 ReportMmapFailureAndDie(size, mem_type, "zx_vmar_map", status, false);
374 return nullptr;
375 }
376
377 IncreaseTotalMmap(size);
378
379 return reinterpret_cast<void *>(addr);
380 }
381
UnmapOrDie(void * addr,uptr size)382 void UnmapOrDie(void *addr, uptr size) {
383 UnmapOrDieVmar(addr, size, _zx_vmar_root_self());
384 }
385
ReleaseMemoryPagesToOS(uptr beg,uptr end)386 void ReleaseMemoryPagesToOS(uptr beg, uptr end) {
387 uptr beg_aligned = RoundUpTo(beg, GetPageSize());
388 uptr end_aligned = RoundDownTo(end, GetPageSize());
389 if (beg_aligned < end_aligned) {
390 zx_handle_t root_vmar = _zx_vmar_root_self();
391 CHECK_NE(root_vmar, ZX_HANDLE_INVALID);
392 zx_status_t status =
393 _zx_vmar_op_range(root_vmar, ZX_VMAR_OP_DECOMMIT, beg_aligned,
394 end_aligned - beg_aligned, nullptr, 0);
395 CHECK_EQ(status, ZX_OK);
396 }
397 }
398
DumpProcessMap()399 void DumpProcessMap() {
400 // TODO(mcgrathr): write it
401 return;
402 }
403
IsAccessibleMemoryRange(uptr beg,uptr size)404 bool IsAccessibleMemoryRange(uptr beg, uptr size) {
405 // TODO(mcgrathr): Figure out a better way.
406 zx_handle_t vmo;
407 zx_status_t status = _zx_vmo_create(size, 0, &vmo);
408 if (status == ZX_OK) {
409 status = _zx_vmo_write(vmo, reinterpret_cast<const void *>(beg), 0, size);
410 _zx_handle_close(vmo);
411 }
412 return status == ZX_OK;
413 }
414
415 // FIXME implement on this platform.
GetMemoryProfile(fill_profile_f cb,uptr * stats,uptr stats_size)416 void GetMemoryProfile(fill_profile_f cb, uptr *stats, uptr stats_size) {}
417
ReadFileToBuffer(const char * file_name,char ** buff,uptr * buff_size,uptr * read_len,uptr max_len,error_t * errno_p)418 bool ReadFileToBuffer(const char *file_name, char **buff, uptr *buff_size,
419 uptr *read_len, uptr max_len, error_t *errno_p) {
420 zx_handle_t vmo;
421 zx_status_t status = __sanitizer_get_configuration(file_name, &vmo);
422 if (status == ZX_OK) {
423 uint64_t vmo_size;
424 status = _zx_vmo_get_size(vmo, &vmo_size);
425 if (status == ZX_OK) {
426 if (vmo_size < max_len)
427 max_len = vmo_size;
428 size_t map_size = RoundUpTo(max_len, GetPageSize());
429 uintptr_t addr;
430 status = _zx_vmar_map(_zx_vmar_root_self(), ZX_VM_PERM_READ, 0, vmo, 0,
431 map_size, &addr);
432 if (status == ZX_OK) {
433 *buff = reinterpret_cast<char *>(addr);
434 *buff_size = map_size;
435 *read_len = max_len;
436 }
437 }
438 _zx_handle_close(vmo);
439 }
440 if (status != ZX_OK && errno_p)
441 *errno_p = status;
442 return status == ZX_OK;
443 }
444
RawWrite(const char * buffer)445 void RawWrite(const char *buffer) {
446 constexpr size_t size = 128;
447 static _Thread_local char line[size];
448 static _Thread_local size_t lastLineEnd = 0;
449 static _Thread_local size_t cur = 0;
450
451 while (*buffer) {
452 if (cur >= size) {
453 if (lastLineEnd == 0)
454 lastLineEnd = size;
455 __sanitizer_log_write(line, lastLineEnd);
456 internal_memmove(line, line + lastLineEnd, cur - lastLineEnd);
457 cur = cur - lastLineEnd;
458 lastLineEnd = 0;
459 }
460 if (*buffer == '\n')
461 lastLineEnd = cur + 1;
462 line[cur++] = *buffer++;
463 }
464 // Flush all complete lines before returning.
465 if (lastLineEnd != 0) {
466 __sanitizer_log_write(line, lastLineEnd);
467 internal_memmove(line, line + lastLineEnd, cur - lastLineEnd);
468 cur = cur - lastLineEnd;
469 lastLineEnd = 0;
470 }
471 }
472
CatastrophicErrorWrite(const char * buffer,uptr length)473 void CatastrophicErrorWrite(const char *buffer, uptr length) {
474 __sanitizer_log_write(buffer, length);
475 }
476
477 char **StoredArgv;
478 char **StoredEnviron;
479
GetArgv()480 char **GetArgv() { return StoredArgv; }
GetEnviron()481 char **GetEnviron() { return StoredEnviron; }
482
GetEnv(const char * name)483 const char *GetEnv(const char *name) {
484 if (StoredEnviron) {
485 uptr NameLen = internal_strlen(name);
486 for (char **Env = StoredEnviron; *Env != 0; Env++) {
487 if (internal_strncmp(*Env, name, NameLen) == 0 && (*Env)[NameLen] == '=')
488 return (*Env) + NameLen + 1;
489 }
490 }
491 return nullptr;
492 }
493
ReadBinaryName(char * buf,uptr buf_len)494 uptr ReadBinaryName(/*out*/ char *buf, uptr buf_len) {
495 const char *argv0 = "<UNKNOWN>";
496 if (StoredArgv && StoredArgv[0]) {
497 argv0 = StoredArgv[0];
498 }
499 internal_strncpy(buf, argv0, buf_len);
500 return internal_strlen(buf);
501 }
502
ReadLongProcessName(char * buf,uptr buf_len)503 uptr ReadLongProcessName(/*out*/ char *buf, uptr buf_len) {
504 return ReadBinaryName(buf, buf_len);
505 }
506
507 uptr MainThreadStackBase, MainThreadStackSize;
508
GetRandom(void * buffer,uptr length,bool blocking)509 bool GetRandom(void *buffer, uptr length, bool blocking) {
510 CHECK_LE(length, ZX_CPRNG_DRAW_MAX_LEN);
511 _zx_cprng_draw(buffer, length);
512 return true;
513 }
514
GetNumberOfCPUs()515 u32 GetNumberOfCPUs() { return zx_system_get_num_cpus(); }
516
GetRSS()517 uptr GetRSS() { UNIMPLEMENTED(); }
518
InitializePlatformCommonFlags(CommonFlags * cf)519 void InitializePlatformCommonFlags(CommonFlags *cf) {}
520
521 } // namespace __sanitizer
522
523 using namespace __sanitizer;
524
525 extern "C" {
__sanitizer_startup_hook(int argc,char ** argv,char ** envp,void * stack_base,size_t stack_size)526 void __sanitizer_startup_hook(int argc, char **argv, char **envp,
527 void *stack_base, size_t stack_size) {
528 __sanitizer::StoredArgv = argv;
529 __sanitizer::StoredEnviron = envp;
530 __sanitizer::MainThreadStackBase = reinterpret_cast<uintptr_t>(stack_base);
531 __sanitizer::MainThreadStackSize = stack_size;
532 }
533
__sanitizer_set_report_path(const char * path)534 void __sanitizer_set_report_path(const char *path) {
535 // Handle the initialization code in each sanitizer, but no other calls.
536 // This setting is never consulted on Fuchsia.
537 DCHECK_EQ(path, common_flags()->log_path);
538 }
539
__sanitizer_set_report_fd(void * fd)540 void __sanitizer_set_report_fd(void *fd) {
541 UNREACHABLE("not available on Fuchsia");
542 }
543
__sanitizer_get_report_path()544 const char *__sanitizer_get_report_path() {
545 UNREACHABLE("not available on Fuchsia");
546 }
547 } // extern "C"
548
549 #endif // SANITIZER_FUCHSIA
550