1 //===-- sanitizer_coverage.cc ---------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Sanitizer Coverage.
11 // This file implements run-time support for a poor man's coverage tool.
13 // Compiler instrumentation:
14 // For every interesting basic block the compiler injects the following code:
16 // __sanitizer_cov(&Guard);
18 // At the module start up time __sanitizer_cov_module_init sets the guards
19 // to consecutive negative numbers (-1, -2, -3, ...).
20 // It's fine to call __sanitizer_cov more than once for a given block.
23 // - __sanitizer_cov(): record that we've executed the PC (GET_CALLER_PC).
24 // and atomically set Guard to -Guard.
25 // - __sanitizer_cov_dump: dump the coverage data to disk.
26 // For every module of the current process that has coverage data
27 // this will create a file module_name.PID.sancov.
29 // The file format is simple: the first 8 bytes is the magic,
30 // one of 0xC0BFFFFFFFFFFF64 and 0xC0BFFFFFFFFFFF32. The last byte of the
31 // magic defines the size of the following offsets.
32 // The rest of the data is the offsets in the module.
34 // Eventually, this coverage implementation should be obsoleted by a more
35 // powerful general purpose Clang/LLVM coverage instrumentation.
36 // Consider this implementation as prototype.
38 // FIXME: support (or at least test with) dlclose.
39 //===----------------------------------------------------------------------===//
41 #include "sanitizer_allocator_internal.h"
42 #include "sanitizer_common.h"
43 #include "sanitizer_libc.h"
44 #include "sanitizer_mutex.h"
45 #include "sanitizer_procmaps.h"
46 #include "sanitizer_stacktrace.h"
47 #include "sanitizer_symbolizer.h"
48 #include "sanitizer_flags.h"
50 using namespace __sanitizer;
52 static const u64 kMagic64 = 0xC0BFFFFFFFFFFF64ULL;
53 static const u64 kMagic32 = 0xC0BFFFFFFFFFFF32ULL;
54 static const uptr kNumWordsForMagic = SANITIZER_WORDSIZE == 64 ? 1 : 2;
55 static const u64 kMagic = SANITIZER_WORDSIZE == 64 ? kMagic64 : kMagic32;
57 static atomic_uint32_t dump_once_guard; // Ensure that CovDump runs only once.
59 static atomic_uintptr_t coverage_counter;
61 // pc_array is the array containing the covered PCs.
62 // To make the pc_array thread- and async-signal-safe it has to be large enough.
63 // 128M counters "ought to be enough for anybody" (4M on 32-bit).
65 // With coverage_direct=1 in ASAN_OPTIONS, pc_array memory is mapped to a file.
66 // In this mode, __sanitizer_cov_dump does nothing, and CovUpdateMapping()
67 // dump current memory layout to another file.
69 static bool cov_sandboxed = false;
70 static fd_t cov_fd = kInvalidFd;
71 static unsigned int cov_max_block_size = 0;
72 static bool coverage_enabled = false;
73 static const char *coverage_dir;
75 namespace __sanitizer {
84 void AfterFork(int child_pid);
85 void Extend(uptr npcs);
86 void Add(uptr pc, u32 *guard);
90 void InitializeGuardArray(s32 *guards);
91 void InitializeGuards(s32 *guards, uptr n, const char *module_name,
93 void ReinitializeGuards();
100 const char *copied_module_name;
101 uptr beg, end; // elements [beg,end) in pc_array.
105 void UpdateModuleNameVec(uptr caller_pc, uptr range_beg, uptr range_end);
106 void GetRangeOffsets(const NamedPcRange& r, Symbolizer* s,
107 InternalMmapVector<uptr>* offsets) const;
109 // Maximal size pc array may ever grow.
110 // We MmapNoReserve this space to ensure that the array is contiguous.
111 static const uptr kPcArrayMaxSize =
112 FIRST_32_SECOND_64(1 << (SANITIZER_ANDROID ? 24 : 26), 1 << 27);
113 // The amount file mapping for the pc array is grown by.
114 static const uptr kPcArrayMmapSize = 64 * 1024;
116 // pc_array is allocated with MmapNoReserveOrDie and so it uses only as
117 // much RAM as it really needs.
119 // Index of the first available pc_array slot.
120 atomic_uintptr_t pc_array_index;
122 atomic_uintptr_t pc_array_size;
123 // Current file mapped size of the pc array.
124 uptr pc_array_mapped_size;
125 // Descriptor of the file mapped pc array.
128 // Vector of coverage guard arrays, protected by mu.
129 InternalMmapVectorNoCtor<s32*> guard_array_vec;
131 // Vector of module and compilation unit pc ranges.
132 InternalMmapVectorNoCtor<NamedPcRange> comp_unit_name_vec;
133 InternalMmapVectorNoCtor<NamedPcRange> module_name_vec;
138 static CoverageData coverage_data;
140 void CovUpdateMapping(const char *path, uptr caller_pc = 0);
142 void CoverageData::DirectOpen() {
143 InternalScopedString path(kMaxPathLength);
144 internal_snprintf((char *)path.data(), path.size(), "%s/%zd.sancov.raw",
145 coverage_dir, internal_getpid());
146 pc_fd = OpenFile(path.data(), RdWr);
147 if (pc_fd == kInvalidFd) {
148 Report("Coverage: failed to open %s for reading/writing\n", path.data());
152 pc_array_mapped_size = 0;
153 CovUpdateMapping(coverage_dir);
156 void CoverageData::Init() {
159 if (!common_flags()->coverage) return;
160 Printf("**\n***\n***\n");
161 Printf("**WARNING: this implementation of SanitizerCoverage is deprecated\n");
162 Printf("**WARNING: and will be removed in future versions\n");
163 Printf("**WARNING: See https://clang.llvm.org/docs/SanitizerCoverage.html\n");
164 Printf("**\n***\n***\n");
167 void CoverageData::Enable() {
170 pc_array = reinterpret_cast<uptr *>(
171 MmapNoReserveOrDie(sizeof(uptr) * kPcArrayMaxSize, "CovInit"));
172 atomic_store(&pc_array_index, 0, memory_order_relaxed);
173 if (common_flags()->coverage_direct) {
174 Report("coverage_direct=1 is deprecated, don't use it.\n");
176 atomic_store(&pc_array_size, 0, memory_order_relaxed);
178 atomic_store(&pc_array_size, kPcArrayMaxSize, memory_order_relaxed);
182 void CoverageData::InitializeGuardArray(s32 *guards) {
183 Enable(); // Make sure coverage is enabled at this point.
185 for (s32 j = 1; j <= n; j++) {
186 uptr idx = atomic_load_relaxed(&pc_array_index);
187 atomic_store_relaxed(&pc_array_index, idx + 1);
188 guards[j] = -static_cast<s32>(idx + 1);
192 void CoverageData::Disable() {
194 UnmapOrDie(pc_array, sizeof(uptr) * kPcArrayMaxSize);
197 if (pc_fd != kInvalidFd) {
203 void CoverageData::ReinitializeGuards() {
204 // Assuming single thread.
205 atomic_store(&pc_array_index, 0, memory_order_relaxed);
206 for (uptr i = 0; i < guard_array_vec.size(); i++)
207 InitializeGuardArray(guard_array_vec[i]);
210 void CoverageData::ReInit() {
212 if (coverage_enabled) {
213 if (common_flags()->coverage_direct) {
214 // In memory-mapped mode we must extend the new file to the known array
216 uptr size = atomic_load(&pc_array_size, memory_order_relaxed);
217 uptr npcs = size / sizeof(uptr);
219 if (size) Extend(npcs);
220 if (coverage_enabled) CovUpdateMapping(coverage_dir);
225 // Re-initialize the guards.
226 // We are single-threaded now, no need to grab any lock.
227 CHECK_EQ(atomic_load(&pc_array_index, memory_order_relaxed), 0);
228 ReinitializeGuards();
231 void CoverageData::BeforeFork() {
235 void CoverageData::AfterFork(int child_pid) {
236 // We are single-threaded so it's OK to release the lock early.
238 if (child_pid == 0) ReInit();
241 // Extend coverage PC array to fit additional npcs elements.
242 void CoverageData::Extend(uptr npcs) {
243 if (!common_flags()->coverage_direct) return;
244 SpinMutexLock l(&mu);
246 uptr size = atomic_load(&pc_array_size, memory_order_relaxed);
247 size += npcs * sizeof(uptr);
249 if (coverage_enabled && size > pc_array_mapped_size) {
250 if (pc_fd == kInvalidFd) DirectOpen();
251 CHECK_NE(pc_fd, kInvalidFd);
253 uptr new_mapped_size = pc_array_mapped_size;
254 while (size > new_mapped_size) new_mapped_size += kPcArrayMmapSize;
255 CHECK_LE(new_mapped_size, sizeof(uptr) * kPcArrayMaxSize);
257 // Extend the file and map the new space at the end of pc_array.
258 uptr res = internal_ftruncate(pc_fd, new_mapped_size);
260 if (internal_iserror(res, &err)) {
261 Printf("failed to extend raw coverage file: %d\n", err);
265 uptr next_map_base = ((uptr)pc_array) + pc_array_mapped_size;
266 void *p = MapWritableFileToMemory((void *)next_map_base,
267 new_mapped_size - pc_array_mapped_size,
268 pc_fd, pc_array_mapped_size);
269 CHECK_EQ((uptr)p, next_map_base);
270 pc_array_mapped_size = new_mapped_size;
273 atomic_store(&pc_array_size, size, memory_order_release);
276 void CoverageData::UpdateModuleNameVec(uptr caller_pc, uptr range_beg,
278 auto sym = Symbolizer::GetOrInit();
281 const char *module_name = sym->GetModuleNameForPc(caller_pc);
282 if (!module_name) return;
283 if (module_name_vec.empty() ||
284 module_name_vec.back().copied_module_name != module_name)
285 module_name_vec.push_back({module_name, range_beg, range_end});
287 module_name_vec.back().end = range_end;
290 void CoverageData::InitializeGuards(s32 *guards, uptr n,
291 const char *comp_unit_name,
293 // The array 'guards' has n+1 elements, we use the element zero
295 CHECK_LT(n, 1 << 30);
296 guards[0] = static_cast<s32>(n);
297 InitializeGuardArray(guards);
298 SpinMutexLock l(&mu);
299 uptr range_end = atomic_load(&pc_array_index, memory_order_relaxed);
300 uptr range_beg = range_end - n;
301 comp_unit_name_vec.push_back({comp_unit_name, range_beg, range_end});
302 guard_array_vec.push_back(guards);
303 UpdateModuleNameVec(caller_pc, range_beg, range_end);
306 static const uptr kBundleCounterBits = 16;
308 // When coverage_order_pcs==true and SANITIZER_WORDSIZE==64
309 // we insert the global counter into the first 16 bits of the PC.
310 uptr BundlePcAndCounter(uptr pc, uptr counter) {
311 if (SANITIZER_WORDSIZE != 64 || !common_flags()->coverage_order_pcs)
313 static const uptr kMaxCounter = (1 << kBundleCounterBits) - 1;
314 if (counter > kMaxCounter)
315 counter = kMaxCounter;
316 CHECK_EQ(0, pc >> (SANITIZER_WORDSIZE - kBundleCounterBits));
317 return pc | (counter << (SANITIZER_WORDSIZE - kBundleCounterBits));
320 uptr UnbundlePc(uptr bundle) {
321 if (SANITIZER_WORDSIZE != 64 || !common_flags()->coverage_order_pcs)
323 return (bundle << kBundleCounterBits) >> kBundleCounterBits;
326 uptr UnbundleCounter(uptr bundle) {
327 if (SANITIZER_WORDSIZE != 64 || !common_flags()->coverage_order_pcs)
329 return bundle >> (SANITIZER_WORDSIZE - kBundleCounterBits);
332 // If guard is negative, atomically set it to -guard and store the PC in
334 void CoverageData::Add(uptr pc, u32 *guard) {
335 atomic_uint32_t *atomic_guard = reinterpret_cast<atomic_uint32_t*>(guard);
336 s32 guard_value = atomic_load(atomic_guard, memory_order_relaxed);
337 if (guard_value >= 0) return;
339 atomic_store(atomic_guard, -guard_value, memory_order_relaxed);
340 if (!pc_array) return;
342 uptr idx = -guard_value - 1;
343 if (idx >= atomic_load(&pc_array_index, memory_order_acquire))
344 return; // May happen after fork when pc_array_index becomes 0.
345 CHECK_LT(idx, atomic_load(&pc_array_size, memory_order_acquire));
346 uptr counter = atomic_fetch_add(&coverage_counter, 1, memory_order_relaxed);
347 pc_array[idx] = BundlePcAndCounter(pc, counter);
350 uptr *CoverageData::data() {
354 uptr CoverageData::size() const {
355 return atomic_load(&pc_array_index, memory_order_relaxed);
358 // Block layout for packed file format: header, followed by module name (no
359 // trailing zero), followed by data blob.
362 unsigned int module_name_length;
363 unsigned int data_length;
366 static void CovWritePacked(int pid, const char *module, const void *blob,
367 unsigned int blob_size) {
368 if (cov_fd == kInvalidFd) return;
369 unsigned module_name_length = internal_strlen(module);
370 CovHeader header = {pid, module_name_length, blob_size};
372 if (cov_max_block_size == 0) {
373 // Writing to a file. Just go ahead.
374 WriteToFile(cov_fd, &header, sizeof(header));
375 WriteToFile(cov_fd, module, module_name_length);
376 WriteToFile(cov_fd, blob, blob_size);
378 // Writing to a socket. We want to split the data into appropriately sized
380 InternalScopedBuffer<char> block(cov_max_block_size);
381 CHECK_EQ((uptr)block.data(), (uptr)(CovHeader *)block.data());
382 uptr header_size_with_module = sizeof(header) + module_name_length;
383 CHECK_LT(header_size_with_module, cov_max_block_size);
384 unsigned int max_payload_size =
385 cov_max_block_size - header_size_with_module;
386 char *block_pos = block.data();
387 internal_memcpy(block_pos, &header, sizeof(header));
388 block_pos += sizeof(header);
389 internal_memcpy(block_pos, module, module_name_length);
390 block_pos += module_name_length;
391 char *block_data_begin = block_pos;
392 const char *blob_pos = (const char *)blob;
393 while (blob_size > 0) {
394 unsigned int payload_size = Min(blob_size, max_payload_size);
395 blob_size -= payload_size;
396 internal_memcpy(block_data_begin, blob_pos, payload_size);
397 blob_pos += payload_size;
398 ((CovHeader *)block.data())->data_length = payload_size;
399 WriteToFile(cov_fd, block.data(), header_size_with_module + payload_size);
404 // If packed = false: <name>.<pid>.<sancov> (name = module name).
405 // If packed = true and name == 0: <pid>.<sancov>.<packed>.
406 // If packed = true and name != 0: <name>.<sancov>.<packed> (name is
408 static fd_t CovOpenFile(InternalScopedString *path, bool packed,
409 const char *name, const char *extension = "sancov") {
413 path->append("%s/%s.%zd.%s", coverage_dir, name, internal_getpid(),
417 path->append("%s/%zd.%s.packed", coverage_dir, internal_getpid(),
420 path->append("%s/%s.%s.packed", coverage_dir, name, extension);
423 fd_t fd = OpenFile(path->data(), WrOnly, &err);
424 if (fd == kInvalidFd)
425 Report("SanitizerCoverage: failed to open %s for writing (reason: %d)\n",
430 void CoverageData::GetRangeOffsets(const NamedPcRange& r, Symbolizer* sym,
431 InternalMmapVector<uptr>* offsets) const {
433 for (uptr i = 0; i < kNumWordsForMagic; i++)
434 offsets->push_back(0);
435 CHECK(r.copied_module_name);
436 CHECK_LE(r.beg, r.end);
437 CHECK_LE(r.end, size());
438 for (uptr i = r.beg; i < r.end; i++) {
439 uptr pc = UnbundlePc(pc_array[i]);
440 uptr counter = UnbundleCounter(pc_array[i]);
441 if (!pc) continue; // Not visited.
443 sym->GetModuleNameAndOffsetForPC(pc, nullptr, &offset);
444 offsets->push_back(BundlePcAndCounter(offset, counter));
447 CHECK_GE(offsets->size(), kNumWordsForMagic);
448 SortArray(offsets->data(), offsets->size());
449 for (uptr i = 0; i < offsets->size(); i++)
450 (*offsets)[i] = UnbundlePc((*offsets)[i]);
453 static void GenerateHtmlReport(const InternalMmapVector<char *> &cov_files) {
454 if (!common_flags()->html_cov_report) {
457 char *sancov_path = FindPathToBinary(common_flags()->sancov_path);
458 if (sancov_path == nullptr) {
462 InternalMmapVector<char *> sancov_argv(cov_files.size() * 2 + 3);
463 sancov_argv.push_back(sancov_path);
464 sancov_argv.push_back(internal_strdup("-html-report"));
465 auto argv_deleter = at_scope_exit([&] {
466 for (uptr i = 0; i < sancov_argv.size(); ++i) {
467 InternalFree(sancov_argv[i]);
471 for (const auto &cov_file : cov_files) {
472 sancov_argv.push_back(internal_strdup(cov_file));
476 ListOfModules modules;
478 for (const LoadedModule &module : modules) {
479 sancov_argv.push_back(internal_strdup(module.full_name()));
483 InternalScopedString report_path(kMaxPathLength);
485 CovOpenFile(&report_path, false /* packed */, GetProcessName(), "html");
486 int pid = StartSubprocess(sancov_argv[0], sancov_argv.data(),
487 kInvalidFd /* stdin */, report_fd /* std_out */);
489 int result = WaitForProcess(pid);
491 Printf("coverage report generated to %s\n", report_path.data());
495 void CoverageData::DumpOffsets() {
496 auto sym = Symbolizer::GetOrInit();
497 if (!common_flags()->coverage_pcs) return;
498 CHECK_NE(sym, nullptr);
499 InternalMmapVector<uptr> offsets(0);
500 InternalScopedString path(kMaxPathLength);
502 InternalMmapVector<char *> cov_files(module_name_vec.size());
503 auto cov_files_deleter = at_scope_exit([&] {
504 for (uptr i = 0; i < cov_files.size(); ++i) {
505 InternalFree(cov_files[i]);
509 for (uptr m = 0; m < module_name_vec.size(); m++) {
510 auto r = module_name_vec[m];
511 GetRangeOffsets(r, sym, &offsets);
513 uptr num_offsets = offsets.size() - kNumWordsForMagic;
514 u64 *magic_p = reinterpret_cast<u64*>(offsets.data());
515 CHECK_EQ(*magic_p, 0ULL);
516 // FIXME: we may want to write 32-bit offsets even in 64-mode
517 // if all the offsets are small enough.
520 const char *module_name = StripModuleName(r.copied_module_name);
522 if (cov_fd != kInvalidFd) {
523 CovWritePacked(internal_getpid(), module_name, offsets.data(),
524 offsets.size() * sizeof(offsets[0]));
525 VReport(1, " CovDump: %zd PCs written to packed file\n", num_offsets);
528 // One file per module per process.
529 fd_t fd = CovOpenFile(&path, false /* packed */, module_name);
530 if (fd == kInvalidFd) continue;
531 WriteToFile(fd, offsets.data(), offsets.size() * sizeof(offsets[0]));
533 cov_files.push_back(internal_strdup(path.data()));
534 VReport(1, " CovDump: %s: %zd PCs written\n", path.data(), num_offsets);
537 if (cov_fd != kInvalidFd)
540 GenerateHtmlReport(cov_files);
543 void CoverageData::DumpAll() {
544 if (!coverage_enabled || common_flags()->coverage_direct) return;
545 if (atomic_fetch_add(&dump_once_guard, 1, memory_order_relaxed))
550 void CovPrepareForSandboxing(__sanitizer_sandbox_arguments *args) {
552 if (!coverage_enabled) return;
553 cov_sandboxed = args->coverage_sandboxed;
554 if (!cov_sandboxed) return;
555 cov_max_block_size = args->coverage_max_block_size;
556 if (args->coverage_fd >= 0) {
557 cov_fd = (fd_t)args->coverage_fd;
559 InternalScopedString path(kMaxPathLength);
560 // Pre-open the file now. The sandbox won't allow us to do it later.
561 cov_fd = CovOpenFile(&path, true /* packed */, nullptr);
565 fd_t MaybeOpenCovFile(const char *name) {
567 if (!coverage_enabled) return kInvalidFd;
568 InternalScopedString path(kMaxPathLength);
569 return CovOpenFile(&path, true /* packed */, name);
572 void CovBeforeFork() {
573 coverage_data.BeforeFork();
576 void CovAfterFork(int child_pid) {
577 coverage_data.AfterFork(child_pid);
580 static void MaybeDumpCoverage() {
581 if (common_flags()->coverage)
582 __sanitizer_cov_dump();
585 void InitializeCoverage(bool enabled, const char *dir) {
586 if (coverage_enabled)
587 return; // May happen if two sanitizer enable coverage in the same process.
588 coverage_enabled = enabled;
590 coverage_data.Init();
591 if (enabled) coverage_data.Enable();
592 if (!common_flags()->coverage_direct) Atexit(__sanitizer_cov_dump);
593 AddDieCallback(MaybeDumpCoverage);
596 void ReInitializeCoverage(bool enabled, const char *dir) {
597 coverage_enabled = enabled;
599 coverage_data.ReInit();
602 void CoverageUpdateMapping() {
603 if (coverage_enabled)
604 CovUpdateMapping(coverage_dir);
607 } // namespace __sanitizer
610 SANITIZER_INTERFACE_ATTRIBUTE void __sanitizer_cov(u32 *guard) {
611 coverage_data.Add(StackTrace::GetPreviousInstructionPc(GET_CALLER_PC()),
614 SANITIZER_INTERFACE_ATTRIBUTE void __sanitizer_cov_with_check(u32 *guard) {
615 atomic_uint32_t *atomic_guard = reinterpret_cast<atomic_uint32_t*>(guard);
616 if (static_cast<s32>(
617 __sanitizer::atomic_load(atomic_guard, memory_order_relaxed)) < 0)
618 coverage_data.Add(StackTrace::GetPreviousInstructionPc(GET_CALLER_PC()),
621 SANITIZER_INTERFACE_ATTRIBUTE void __sanitizer_cov_init() {
622 coverage_enabled = true;
623 coverage_dir = common_flags()->coverage_dir;
624 coverage_data.Init();
626 SANITIZER_INTERFACE_ATTRIBUTE void __sanitizer_cov_dump() {
627 coverage_data.DumpAll();
628 __sanitizer_dump_trace_pc_guard_coverage();
630 SANITIZER_INTERFACE_ATTRIBUTE void
631 __sanitizer_cov_module_init(s32 *guards, uptr npcs, u8 *counters,
632 const char *comp_unit_name) {
633 coverage_data.InitializeGuards(guards, npcs, comp_unit_name, GET_CALLER_PC());
634 if (!common_flags()->coverage_direct) return;
635 if (SANITIZER_ANDROID && coverage_enabled) {
636 // dlopen/dlclose interceptors do not work on Android, so we rely on
637 // Extend() calls to update .sancov.map.
638 CovUpdateMapping(coverage_dir, GET_CALLER_PC());
640 coverage_data.Extend(npcs);
642 SANITIZER_INTERFACE_ATTRIBUTE
643 sptr __sanitizer_maybe_open_cov_file(const char *name) {
644 return (sptr)MaybeOpenCovFile(name);
646 SANITIZER_INTERFACE_ATTRIBUTE
647 uptr __sanitizer_get_total_unique_coverage() {
648 return atomic_load(&coverage_counter, memory_order_relaxed);
651 // Default empty implementations (weak). Users should redefine them.
652 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_cmp, void) {}
653 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_cmp1, void) {}
654 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_cmp2, void) {}
655 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_cmp4, void) {}
656 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_cmp8, void) {}
657 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_switch, void) {}
658 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_div4, void) {}
659 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_div8, void) {}
660 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_gep, void) {}
661 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_pc_indir, void) {}