1 //===-- asan_errors.cpp -----------------------------------------*- C++ -*-===//
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 a part of AddressSanitizer, an address sanity checker.
10 //
11 // ASan implementation for error structures.
12 //===----------------------------------------------------------------------===//
13 
14 #include "asan_errors.h"
15 #include "asan_descriptions.h"
16 #include "asan_mapping.h"
17 #include "asan_report.h"
18 #include "asan_stack.h"
19 #include "sanitizer_common/sanitizer_stackdepot.h"
20 
21 namespace __asan {
22 
23 static void OnStackUnwind(const SignalContext &sig,
24                           const void *callback_context,
25                           BufferedStackTrace *stack) {
26   bool fast = common_flags()->fast_unwind_on_fatal;
27 #if SANITIZER_FREEBSD || SANITIZER_NETBSD
28   // On FreeBSD the slow unwinding that leverages _Unwind_Backtrace()
29   // yields the call stack of the signal's handler and not of the code
30   // that raised the signal (as it does on Linux).
31   fast = true;
32 #endif
33   // Tests and maybe some users expect that scariness is going to be printed
34   // just before the stack. As only asan has scariness score we have no
35   // corresponding code in the sanitizer_common and we use this callback to
36   // print it.
37   static_cast<const ScarinessScoreBase *>(callback_context)->Print();
38   stack->Unwind(sig.pc, sig.bp, sig.context, fast);
39 }
40 
41 void ErrorDeadlySignal::Print() {
42   ReportDeadlySignal(signal, tid, &OnStackUnwind, &scariness);
43 }
44 
45 void ErrorDoubleFree::Print() {
46   Decorator d;
47   Printf("%s", d.Error());
48   Report(
49       "ERROR: AddressSanitizer: attempting %s on %p in thread %s:\n",
50       scariness.GetDescription(), addr_description.addr,
51       AsanThreadIdAndName(tid).c_str());
52   Printf("%s", d.Default());
53   scariness.Print();
54   GET_STACK_TRACE_FATAL(second_free_stack->trace[0],
55                         second_free_stack->top_frame_bp);
56   stack.Print();
57   addr_description.Print();
58   ReportErrorSummary(scariness.GetDescription(), &stack);
59 }
60 
61 void ErrorNewDeleteTypeMismatch::Print() {
62   Decorator d;
63   Printf("%s", d.Error());
64   Report(
65       "ERROR: AddressSanitizer: %s on %p in thread %s:\n",
66       scariness.GetDescription(), addr_description.addr,
67       AsanThreadIdAndName(tid).c_str());
68   Printf("%s  object passed to delete has wrong type:\n", d.Default());
69   if (delete_size != 0) {
70     Printf(
71         "  size of the allocated type:   %zd bytes;\n"
72         "  size of the deallocated type: %zd bytes.\n",
73         addr_description.chunk_access.chunk_size, delete_size);
74   }
75   const uptr user_alignment =
76       addr_description.chunk_access.user_requested_alignment;
77   if (delete_alignment != user_alignment) {
78     char user_alignment_str[32];
79     char delete_alignment_str[32];
80     internal_snprintf(user_alignment_str, sizeof(user_alignment_str),
81                       "%zd bytes", user_alignment);
82     internal_snprintf(delete_alignment_str, sizeof(delete_alignment_str),
83                       "%zd bytes", delete_alignment);
84     static const char *kDefaultAlignment = "default-aligned";
85     Printf(
86         "  alignment of the allocated type:   %s;\n"
87         "  alignment of the deallocated type: %s.\n",
88         user_alignment > 0 ? user_alignment_str : kDefaultAlignment,
89         delete_alignment > 0 ? delete_alignment_str : kDefaultAlignment);
90   }
91   CHECK_GT(free_stack->size, 0);
92   scariness.Print();
93   GET_STACK_TRACE_FATAL(free_stack->trace[0], free_stack->top_frame_bp);
94   stack.Print();
95   addr_description.Print();
96   ReportErrorSummary(scariness.GetDescription(), &stack);
97   Report(
98       "HINT: if you don't care about these errors you may set "
99       "ASAN_OPTIONS=new_delete_type_mismatch=0\n");
100 }
101 
102 void ErrorFreeNotMalloced::Print() {
103   Decorator d;
104   Printf("%s", d.Error());
105   Report(
106       "ERROR: AddressSanitizer: attempting free on address "
107       "which was not malloc()-ed: %p in thread %s\n",
108       addr_description.Address(), AsanThreadIdAndName(tid).c_str());
109   Printf("%s", d.Default());
110   CHECK_GT(free_stack->size, 0);
111   scariness.Print();
112   GET_STACK_TRACE_FATAL(free_stack->trace[0], free_stack->top_frame_bp);
113   stack.Print();
114   addr_description.Print();
115   ReportErrorSummary(scariness.GetDescription(), &stack);
116 }
117 
118 void ErrorAllocTypeMismatch::Print() {
119   static const char *alloc_names[] = {"INVALID", "malloc", "operator new",
120                                       "operator new []"};
121   static const char *dealloc_names[] = {"INVALID", "free", "operator delete",
122                                         "operator delete []"};
123   CHECK_NE(alloc_type, dealloc_type);
124   Decorator d;
125   Printf("%s", d.Error());
126   Report("ERROR: AddressSanitizer: %s (%s vs %s) on %p\n",
127          scariness.GetDescription(), alloc_names[alloc_type],
128          dealloc_names[dealloc_type], addr_description.Address());
129   Printf("%s", d.Default());
130   CHECK_GT(dealloc_stack->size, 0);
131   scariness.Print();
132   GET_STACK_TRACE_FATAL(dealloc_stack->trace[0], dealloc_stack->top_frame_bp);
133   stack.Print();
134   addr_description.Print();
135   ReportErrorSummary(scariness.GetDescription(), &stack);
136   Report(
137       "HINT: if you don't care about these errors you may set "
138       "ASAN_OPTIONS=alloc_dealloc_mismatch=0\n");
139 }
140 
141 void ErrorMallocUsableSizeNotOwned::Print() {
142   Decorator d;
143   Printf("%s", d.Error());
144   Report(
145       "ERROR: AddressSanitizer: attempting to call malloc_usable_size() for "
146       "pointer which is not owned: %p\n",
147       addr_description.Address());
148   Printf("%s", d.Default());
149   stack->Print();
150   addr_description.Print();
151   ReportErrorSummary(scariness.GetDescription(), stack);
152 }
153 
154 void ErrorSanitizerGetAllocatedSizeNotOwned::Print() {
155   Decorator d;
156   Printf("%s", d.Error());
157   Report(
158       "ERROR: AddressSanitizer: attempting to call "
159       "__sanitizer_get_allocated_size() for pointer which is not owned: %p\n",
160       addr_description.Address());
161   Printf("%s", d.Default());
162   stack->Print();
163   addr_description.Print();
164   ReportErrorSummary(scariness.GetDescription(), stack);
165 }
166 
167 void ErrorCallocOverflow::Print() {
168   Decorator d;
169   Printf("%s", d.Error());
170   Report(
171       "ERROR: AddressSanitizer: calloc parameters overflow: count * size "
172       "(%zd * %zd) cannot be represented in type size_t (thread %s)\n",
173       count, size, AsanThreadIdAndName(tid).c_str());
174   Printf("%s", d.Default());
175   stack->Print();
176   PrintHintAllocatorCannotReturnNull();
177   ReportErrorSummary(scariness.GetDescription(), stack);
178 }
179 
180 void ErrorReallocArrayOverflow::Print() {
181   Decorator d;
182   Printf("%s", d.Error());
183   Report(
184       "ERROR: AddressSanitizer: reallocarray parameters overflow: count * size "
185       "(%zd * %zd) cannot be represented in type size_t (thread %s)\n",
186       count, size, AsanThreadIdAndName(tid).c_str());
187   Printf("%s", d.Default());
188   stack->Print();
189   PrintHintAllocatorCannotReturnNull();
190   ReportErrorSummary(scariness.GetDescription(), stack);
191 }
192 
193 void ErrorPvallocOverflow::Print() {
194   Decorator d;
195   Printf("%s", d.Error());
196   Report(
197       "ERROR: AddressSanitizer: pvalloc parameters overflow: size 0x%zx "
198       "rounded up to system page size 0x%zx cannot be represented in type "
199       "size_t (thread %s)\n",
200       size, GetPageSizeCached(), AsanThreadIdAndName(tid).c_str());
201   Printf("%s", d.Default());
202   stack->Print();
203   PrintHintAllocatorCannotReturnNull();
204   ReportErrorSummary(scariness.GetDescription(), stack);
205 }
206 
207 void ErrorInvalidAllocationAlignment::Print() {
208   Decorator d;
209   Printf("%s", d.Error());
210   Report(
211       "ERROR: AddressSanitizer: invalid allocation alignment: %zd, "
212       "alignment must be a power of two (thread %s)\n",
213       alignment, AsanThreadIdAndName(tid).c_str());
214   Printf("%s", d.Default());
215   stack->Print();
216   PrintHintAllocatorCannotReturnNull();
217   ReportErrorSummary(scariness.GetDescription(), stack);
218 }
219 
220 void ErrorInvalidAlignedAllocAlignment::Print() {
221   Decorator d;
222   Printf("%s", d.Error());
223 #if SANITIZER_POSIX
224   Report("ERROR: AddressSanitizer: invalid alignment requested in "
225          "aligned_alloc: %zd, alignment must be a power of two and the "
226          "requested size 0x%zx must be a multiple of alignment "
227          "(thread %s)\n", alignment, size, AsanThreadIdAndName(tid).c_str());
228 #else
229   Report("ERROR: AddressSanitizer: invalid alignment requested in "
230          "aligned_alloc: %zd, the requested size 0x%zx must be a multiple of "
231          "alignment (thread %s)\n", alignment, size,
232          AsanThreadIdAndName(tid).c_str());
233 #endif
234   Printf("%s", d.Default());
235   stack->Print();
236   PrintHintAllocatorCannotReturnNull();
237   ReportErrorSummary(scariness.GetDescription(), stack);
238 }
239 
240 void ErrorInvalidPosixMemalignAlignment::Print() {
241   Decorator d;
242   Printf("%s", d.Error());
243   Report(
244       "ERROR: AddressSanitizer: invalid alignment requested in posix_memalign: "
245       "%zd, alignment must be a power of two and a multiple of sizeof(void*) "
246       "== %zd (thread %s)\n",
247       alignment, sizeof(void*), AsanThreadIdAndName(tid).c_str());  // NOLINT
248   Printf("%s", d.Default());
249   stack->Print();
250   PrintHintAllocatorCannotReturnNull();
251   ReportErrorSummary(scariness.GetDescription(), stack);
252 }
253 
254 void ErrorAllocationSizeTooBig::Print() {
255   Decorator d;
256   Printf("%s", d.Error());
257   Report(
258       "ERROR: AddressSanitizer: requested allocation size 0x%zx (0x%zx after "
259       "adjustments for alignment, red zones etc.) exceeds maximum supported "
260       "size of 0x%zx (thread %s)\n",
261       user_size, total_size, max_size, AsanThreadIdAndName(tid).c_str());
262   Printf("%s", d.Default());
263   stack->Print();
264   PrintHintAllocatorCannotReturnNull();
265   ReportErrorSummary(scariness.GetDescription(), stack);
266 }
267 
268 void ErrorRssLimitExceeded::Print() {
269   Decorator d;
270   Printf("%s", d.Error());
271   Report(
272       "ERROR: AddressSanitizer: specified RSS limit exceeded, currently set to "
273       "soft_rss_limit_mb=%zd\n", common_flags()->soft_rss_limit_mb);
274   Printf("%s", d.Default());
275   stack->Print();
276   PrintHintAllocatorCannotReturnNull();
277   ReportErrorSummary(scariness.GetDescription(), stack);
278 }
279 
280 void ErrorOutOfMemory::Print() {
281   Decorator d;
282   Printf("%s", d.Error());
283   Report(
284       "ERROR: AddressSanitizer: allocator is out of memory trying to allocate "
285       "0x%zx bytes\n", requested_size);
286   Printf("%s", d.Default());
287   stack->Print();
288   PrintHintAllocatorCannotReturnNull();
289   ReportErrorSummary(scariness.GetDescription(), stack);
290 }
291 
292 void ErrorStringFunctionMemoryRangesOverlap::Print() {
293   Decorator d;
294   char bug_type[100];
295   internal_snprintf(bug_type, sizeof(bug_type), "%s-param-overlap", function);
296   Printf("%s", d.Error());
297   Report(
298       "ERROR: AddressSanitizer: %s: memory ranges [%p,%p) and [%p, %p) "
299       "overlap\n",
300       bug_type, addr1_description.Address(),
301       addr1_description.Address() + length1, addr2_description.Address(),
302       addr2_description.Address() + length2);
303   Printf("%s", d.Default());
304   scariness.Print();
305   stack->Print();
306   addr1_description.Print();
307   addr2_description.Print();
308   ReportErrorSummary(bug_type, stack);
309 }
310 
311 void ErrorStringFunctionSizeOverflow::Print() {
312   Decorator d;
313   Printf("%s", d.Error());
314   Report("ERROR: AddressSanitizer: %s: (size=%zd)\n",
315          scariness.GetDescription(), size);
316   Printf("%s", d.Default());
317   scariness.Print();
318   stack->Print();
319   addr_description.Print();
320   ReportErrorSummary(scariness.GetDescription(), stack);
321 }
322 
323 void ErrorBadParamsToAnnotateContiguousContainer::Print() {
324   Report(
325       "ERROR: AddressSanitizer: bad parameters to "
326       "__sanitizer_annotate_contiguous_container:\n"
327       "      beg     : %p\n"
328       "      end     : %p\n"
329       "      old_mid : %p\n"
330       "      new_mid : %p\n",
331       beg, end, old_mid, new_mid);
332   uptr granularity = SHADOW_GRANULARITY;
333   if (!IsAligned(beg, granularity))
334     Report("ERROR: beg is not aligned by %d\n", granularity);
335   stack->Print();
336   ReportErrorSummary(scariness.GetDescription(), stack);
337 }
338 
339 void ErrorODRViolation::Print() {
340   Decorator d;
341   Printf("%s", d.Error());
342   Report("ERROR: AddressSanitizer: %s (%p):\n", scariness.GetDescription(),
343          global1.beg);
344   Printf("%s", d.Default());
345   InternalScopedString g1_loc(256), g2_loc(256);
346   PrintGlobalLocation(&g1_loc, global1);
347   PrintGlobalLocation(&g2_loc, global2);
348   Printf("  [1] size=%zd '%s' %s\n", global1.size,
349          MaybeDemangleGlobalName(global1.name), g1_loc.data());
350   Printf("  [2] size=%zd '%s' %s\n", global2.size,
351          MaybeDemangleGlobalName(global2.name), g2_loc.data());
352   if (stack_id1 && stack_id2) {
353     Printf("These globals were registered at these points:\n");
354     Printf("  [1]:\n");
355     StackDepotGet(stack_id1).Print();
356     Printf("  [2]:\n");
357     StackDepotGet(stack_id2).Print();
358   }
359   Report(
360       "HINT: if you don't care about these errors you may set "
361       "ASAN_OPTIONS=detect_odr_violation=0\n");
362   InternalScopedString error_msg(256);
363   error_msg.append("%s: global '%s' at %s", scariness.GetDescription(),
364                    MaybeDemangleGlobalName(global1.name), g1_loc.data());
365   ReportErrorSummary(error_msg.data());
366 }
367 
368 void ErrorInvalidPointerPair::Print() {
369   Decorator d;
370   Printf("%s", d.Error());
371   Report("ERROR: AddressSanitizer: %s: %p %p\n", scariness.GetDescription(),
372          addr1_description.Address(), addr2_description.Address());
373   Printf("%s", d.Default());
374   GET_STACK_TRACE_FATAL(pc, bp);
375   stack.Print();
376   addr1_description.Print();
377   addr2_description.Print();
378   ReportErrorSummary(scariness.GetDescription(), &stack);
379 }
380 
381 static bool AdjacentShadowValuesAreFullyPoisoned(u8 *s) {
382   return s[-1] > 127 && s[1] > 127;
383 }
384 
385 ErrorGeneric::ErrorGeneric(u32 tid, uptr pc_, uptr bp_, uptr sp_, uptr addr,
386                            bool is_write_, uptr access_size_)
387     : ErrorBase(tid),
388       addr_description(addr, access_size_, /*shouldLockThreadRegistry=*/false),
389       pc(pc_),
390       bp(bp_),
391       sp(sp_),
392       access_size(access_size_),
393       is_write(is_write_),
394       shadow_val(0) {
395   scariness.Clear();
396   if (access_size) {
397     if (access_size <= 9) {
398       char desr[] = "?-byte";
399       desr[0] = '0' + access_size;
400       scariness.Scare(access_size + access_size / 2, desr);
401     } else if (access_size >= 10) {
402       scariness.Scare(15, "multi-byte");
403     }
404     is_write ? scariness.Scare(20, "write") : scariness.Scare(1, "read");
405 
406     // Determine the error type.
407     bug_descr = "unknown-crash";
408     if (AddrIsInMem(addr)) {
409       u8 *shadow_addr = (u8 *)MemToShadow(addr);
410       // If we are accessing 16 bytes, look at the second shadow byte.
411       if (*shadow_addr == 0 && access_size > SHADOW_GRANULARITY) shadow_addr++;
412       // If we are in the partial right redzone, look at the next shadow byte.
413       if (*shadow_addr > 0 && *shadow_addr < 128) shadow_addr++;
414       bool far_from_bounds = false;
415       shadow_val = *shadow_addr;
416       int bug_type_score = 0;
417       // For use-after-frees reads are almost as bad as writes.
418       int read_after_free_bonus = 0;
419       switch (shadow_val) {
420         case kAsanHeapLeftRedzoneMagic:
421         case kAsanArrayCookieMagic:
422           bug_descr = "heap-buffer-overflow";
423           bug_type_score = 10;
424           far_from_bounds = AdjacentShadowValuesAreFullyPoisoned(shadow_addr);
425           break;
426         case kAsanHeapFreeMagic:
427           bug_descr = "heap-use-after-free";
428           bug_type_score = 20;
429           if (!is_write) read_after_free_bonus = 18;
430           break;
431         case kAsanStackLeftRedzoneMagic:
432           bug_descr = "stack-buffer-underflow";
433           bug_type_score = 25;
434           far_from_bounds = AdjacentShadowValuesAreFullyPoisoned(shadow_addr);
435           break;
436         case kAsanInitializationOrderMagic:
437           bug_descr = "initialization-order-fiasco";
438           bug_type_score = 1;
439           break;
440         case kAsanStackMidRedzoneMagic:
441         case kAsanStackRightRedzoneMagic:
442           bug_descr = "stack-buffer-overflow";
443           bug_type_score = 25;
444           far_from_bounds = AdjacentShadowValuesAreFullyPoisoned(shadow_addr);
445           break;
446         case kAsanStackAfterReturnMagic:
447           bug_descr = "stack-use-after-return";
448           bug_type_score = 30;
449           if (!is_write) read_after_free_bonus = 18;
450           break;
451         case kAsanUserPoisonedMemoryMagic:
452           bug_descr = "use-after-poison";
453           bug_type_score = 20;
454           break;
455         case kAsanContiguousContainerOOBMagic:
456           bug_descr = "container-overflow";
457           bug_type_score = 10;
458           break;
459         case kAsanStackUseAfterScopeMagic:
460           bug_descr = "stack-use-after-scope";
461           bug_type_score = 10;
462           break;
463         case kAsanGlobalRedzoneMagic:
464           bug_descr = "global-buffer-overflow";
465           bug_type_score = 10;
466           far_from_bounds = AdjacentShadowValuesAreFullyPoisoned(shadow_addr);
467           break;
468         case kAsanIntraObjectRedzone:
469           bug_descr = "intra-object-overflow";
470           bug_type_score = 10;
471           break;
472         case kAsanAllocaLeftMagic:
473         case kAsanAllocaRightMagic:
474           bug_descr = "dynamic-stack-buffer-overflow";
475           bug_type_score = 25;
476           far_from_bounds = AdjacentShadowValuesAreFullyPoisoned(shadow_addr);
477           break;
478       }
479       scariness.Scare(bug_type_score + read_after_free_bonus, bug_descr);
480       if (far_from_bounds) scariness.Scare(10, "far-from-bounds");
481     }
482   }
483 }
484 
485 static void PrintContainerOverflowHint() {
486   Printf("HINT: if you don't care about these errors you may set "
487          "ASAN_OPTIONS=detect_container_overflow=0.\n"
488          "If you suspect a false positive see also: "
489          "https://github.com/google/sanitizers/wiki/"
490          "AddressSanitizerContainerOverflow.\n");
491 }
492 
493 static void PrintShadowByte(InternalScopedString *str, const char *before,
494     u8 byte, const char *after = "\n") {
495   PrintMemoryByte(str, before, byte, /*in_shadow*/true, after);
496 }
497 
498 static void PrintLegend(InternalScopedString *str) {
499   str->append(
500       "Shadow byte legend (one shadow byte represents %d "
501       "application bytes):\n",
502       (int)SHADOW_GRANULARITY);
503   PrintShadowByte(str, "  Addressable:           ", 0);
504   str->append("  Partially addressable: ");
505   for (u8 i = 1; i < SHADOW_GRANULARITY; i++) PrintShadowByte(str, "", i, " ");
506   str->append("\n");
507   PrintShadowByte(str, "  Heap left redzone:       ",
508                   kAsanHeapLeftRedzoneMagic);
509   PrintShadowByte(str, "  Freed heap region:       ", kAsanHeapFreeMagic);
510   PrintShadowByte(str, "  Stack left redzone:      ",
511                   kAsanStackLeftRedzoneMagic);
512   PrintShadowByte(str, "  Stack mid redzone:       ",
513                   kAsanStackMidRedzoneMagic);
514   PrintShadowByte(str, "  Stack right redzone:     ",
515                   kAsanStackRightRedzoneMagic);
516   PrintShadowByte(str, "  Stack after return:      ",
517                   kAsanStackAfterReturnMagic);
518   PrintShadowByte(str, "  Stack use after scope:   ",
519                   kAsanStackUseAfterScopeMagic);
520   PrintShadowByte(str, "  Global redzone:          ", kAsanGlobalRedzoneMagic);
521   PrintShadowByte(str, "  Global init order:       ",
522                   kAsanInitializationOrderMagic);
523   PrintShadowByte(str, "  Poisoned by user:        ",
524                   kAsanUserPoisonedMemoryMagic);
525   PrintShadowByte(str, "  Container overflow:      ",
526                   kAsanContiguousContainerOOBMagic);
527   PrintShadowByte(str, "  Array cookie:            ",
528                   kAsanArrayCookieMagic);
529   PrintShadowByte(str, "  Intra object redzone:    ",
530                   kAsanIntraObjectRedzone);
531   PrintShadowByte(str, "  ASan internal:           ", kAsanInternalHeapMagic);
532   PrintShadowByte(str, "  Left alloca redzone:     ", kAsanAllocaLeftMagic);
533   PrintShadowByte(str, "  Right alloca redzone:    ", kAsanAllocaRightMagic);
534   PrintShadowByte(str, "  Shadow gap:              ", kAsanShadowGap);
535 }
536 
537 static void PrintShadowBytes(InternalScopedString *str, const char *before,
538                              u8 *bytes, u8 *guilty, uptr n) {
539   Decorator d;
540   if (before) str->append("%s%p:", before, bytes);
541   for (uptr i = 0; i < n; i++) {
542     u8 *p = bytes + i;
543     const char *before =
544         p == guilty ? "[" : (p - 1 == guilty && i != 0) ? "" : " ";
545     const char *after = p == guilty ? "]" : "";
546     PrintShadowByte(str, before, *p, after);
547   }
548   str->append("\n");
549 }
550 
551 static void PrintShadowMemoryForAddress(uptr addr) {
552   if (!AddrIsInMem(addr)) return;
553   uptr shadow_addr = MemToShadow(addr);
554   const uptr n_bytes_per_row = 16;
555   uptr aligned_shadow = shadow_addr & ~(n_bytes_per_row - 1);
556   InternalScopedString str(4096 * 8);
557   str.append("Shadow bytes around the buggy address:\n");
558   for (int i = -5; i <= 5; i++) {
559     uptr row_shadow_addr = aligned_shadow + i * n_bytes_per_row;
560     // Skip rows that would be outside the shadow range. This can happen when
561     // the user address is near the bottom, top, or shadow gap of the address
562     // space.
563     if (!AddrIsInShadow(row_shadow_addr)) continue;
564     const char *prefix = (i == 0) ? "=>" : "  ";
565     PrintShadowBytes(&str, prefix, (u8 *)row_shadow_addr, (u8 *)shadow_addr,
566                      n_bytes_per_row);
567   }
568   if (flags()->print_legend) PrintLegend(&str);
569   Printf("%s", str.data());
570 }
571 
572 void ErrorGeneric::Print() {
573   Decorator d;
574   Printf("%s", d.Error());
575   uptr addr = addr_description.Address();
576   Report("ERROR: AddressSanitizer: %s on address %p at pc %p bp %p sp %p\n",
577          bug_descr, (void *)addr, pc, bp, sp);
578   Printf("%s", d.Default());
579 
580   Printf("%s%s of size %zu at %p thread %s%s\n", d.Access(),
581          access_size ? (is_write ? "WRITE" : "READ") : "ACCESS", access_size,
582          (void *)addr, AsanThreadIdAndName(tid).c_str(), d.Default());
583 
584   scariness.Print();
585   GET_STACK_TRACE_FATAL(pc, bp);
586   stack.Print();
587 
588   // Pass bug_descr because we have a special case for
589   // initialization-order-fiasco
590   addr_description.Print(bug_descr);
591   if (shadow_val == kAsanContiguousContainerOOBMagic)
592     PrintContainerOverflowHint();
593   ReportErrorSummary(bug_descr, &stack);
594   PrintShadowMemoryForAddress(addr);
595 }
596 
597 }  // namespace __asan
598