Kostya Serebryany | 4b48f45 | 2012-12-27 14:09:19 +0000 | [diff] [blame] | 1 | //===-- msan_report.cc ----------------------------------------------------===// |
Evgeniy Stepanov | db010da | 2012-12-26 09:32:05 +0000 | [diff] [blame] | 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This file is a part of MemorySanitizer. |
| 11 | // |
| 12 | // Error reporting. |
| 13 | //===----------------------------------------------------------------------===// |
| 14 | |
| 15 | #include "msan.h" |
Alexey Samsonov | 1f3c2fe | 2013-05-29 09:15:39 +0000 | [diff] [blame] | 16 | #include "sanitizer_common/sanitizer_allocator_internal.h" |
Evgeniy Stepanov | db010da | 2012-12-26 09:32:05 +0000 | [diff] [blame] | 17 | #include "sanitizer_common/sanitizer_common.h" |
Sergey Matveev | 0b4bf4d | 2013-05-06 13:15:14 +0000 | [diff] [blame] | 18 | #include "sanitizer_common/sanitizer_flags.h" |
Evgeniy Stepanov | db010da | 2012-12-26 09:32:05 +0000 | [diff] [blame] | 19 | #include "sanitizer_common/sanitizer_mutex.h" |
Evgeniy Stepanov | c209ba6 | 2012-12-26 10:16:45 +0000 | [diff] [blame] | 20 | #include "sanitizer_common/sanitizer_report_decorator.h" |
Evgeniy Stepanov | db010da | 2012-12-26 09:32:05 +0000 | [diff] [blame] | 21 | #include "sanitizer_common/sanitizer_stackdepot.h" |
Kostya Serebryany | 1d333c5 | 2013-02-07 08:04:56 +0000 | [diff] [blame] | 22 | #include "sanitizer_common/sanitizer_symbolizer.h" |
Evgeniy Stepanov | db010da | 2012-12-26 09:32:05 +0000 | [diff] [blame] | 23 | |
| 24 | using namespace __sanitizer; |
| 25 | |
Evgeniy Stepanov | db010da | 2012-12-26 09:32:05 +0000 | [diff] [blame] | 26 | namespace __msan { |
| 27 | |
Evgeniy Stepanov | c209ba6 | 2012-12-26 10:16:45 +0000 | [diff] [blame] | 28 | class Decorator: private __sanitizer::AnsiColorDecorator { |
| 29 | public: |
| 30 | Decorator() : __sanitizer::AnsiColorDecorator(PrintsToTtyCached()) { } |
| 31 | const char *Warning() { return Red(); } |
| 32 | const char *Origin() { return Magenta(); } |
| 33 | const char *Name() { return Green(); } |
| 34 | const char *End() { return Default(); } |
| 35 | }; |
| 36 | |
Kostya Serebryany | 70c6e3f | 2013-02-13 07:19:47 +0000 | [diff] [blame] | 37 | static void PrintStack(const uptr *trace, uptr size) { |
| 38 | SymbolizerScope sym_scope; |
Alexey Samsonov | 90b0f1e | 2013-10-04 08:55:03 +0000 | [diff] [blame] | 39 | StackTrace::PrintStack(trace, size, true, 0); |
Kostya Serebryany | 70c6e3f | 2013-02-13 07:19:47 +0000 | [diff] [blame] | 40 | } |
| 41 | |
Evgeniy Stepanov | db010da | 2012-12-26 09:32:05 +0000 | [diff] [blame] | 42 | static void DescribeOrigin(u32 origin) { |
Evgeniy Stepanov | c209ba6 | 2012-12-26 10:16:45 +0000 | [diff] [blame] | 43 | Decorator d; |
Evgeniy Stepanov | 719df33 | 2013-10-25 11:17:54 +0000 | [diff] [blame^] | 44 | Printf("\n"); |
Dmitry Vyukov | 6866dba | 2013-10-15 13:28:51 +0000 | [diff] [blame] | 45 | if (common_flags()->verbosity) |
Evgeniy Stepanov | db010da | 2012-12-26 09:32:05 +0000 | [diff] [blame] | 46 | Printf(" raw origin id: %d\n", origin); |
Evgeniy Stepanov | 6f34605 | 2013-09-13 12:49:13 +0000 | [diff] [blame] | 47 | uptr pc; |
| 48 | if (const char *so = GetOriginDescrIfStack(origin, &pc)) { |
Evgeniy Stepanov | db010da | 2012-12-26 09:32:05 +0000 | [diff] [blame] | 49 | char* s = internal_strdup(so); |
| 50 | char* sep = internal_strchr(s, '@'); |
| 51 | CHECK(sep); |
| 52 | *sep = '\0'; |
Evgeniy Stepanov | c209ba6 | 2012-12-26 10:16:45 +0000 | [diff] [blame] | 53 | Printf("%s", d.Origin()); |
Evgeniy Stepanov | 9af8676 | 2013-02-11 11:34:26 +0000 | [diff] [blame] | 54 | Printf(" %sUninitialized value was created by an allocation of '%s%s%s'" |
Evgeniy Stepanov | c209ba6 | 2012-12-26 10:16:45 +0000 | [diff] [blame] | 55 | " in the stack frame of function '%s%s%s'%s\n", |
Alexey Samsonov | 7847d77 | 2013-09-10 14:36:16 +0000 | [diff] [blame] | 56 | d.Origin(), d.Name(), s, d.Origin(), d.Name(), |
| 57 | getSymbolizer()->Demangle(sep + 1), d.Origin(), d.End()); |
Evgeniy Stepanov | db010da | 2012-12-26 09:32:05 +0000 | [diff] [blame] | 58 | InternalFree(s); |
Evgeniy Stepanov | 6f34605 | 2013-09-13 12:49:13 +0000 | [diff] [blame] | 59 | |
| 60 | if (pc) { |
| 61 | // For some reason function address in LLVM IR is 1 less then the address |
| 62 | // of the first instruction. |
| 63 | pc += 1; |
| 64 | PrintStack(&pc, 1); |
| 65 | } |
Evgeniy Stepanov | db010da | 2012-12-26 09:32:05 +0000 | [diff] [blame] | 66 | } else { |
| 67 | uptr size = 0; |
| 68 | const uptr *trace = StackDepotGet(origin, &size); |
Evgeniy Stepanov | 9af8676 | 2013-02-11 11:34:26 +0000 | [diff] [blame] | 69 | Printf(" %sUninitialized value was created by a heap allocation%s\n", |
Evgeniy Stepanov | c209ba6 | 2012-12-26 10:16:45 +0000 | [diff] [blame] | 70 | d.Origin(), d.End()); |
Kostya Serebryany | 70c6e3f | 2013-02-13 07:19:47 +0000 | [diff] [blame] | 71 | PrintStack(trace, size); |
Evgeniy Stepanov | db010da | 2012-12-26 09:32:05 +0000 | [diff] [blame] | 72 | } |
| 73 | } |
| 74 | |
Kostya Serebryany | 1d333c5 | 2013-02-07 08:04:56 +0000 | [diff] [blame] | 75 | static void ReportSummary(const char *error_type, StackTrace *stack) { |
Alexey Samsonov | 7847d77 | 2013-09-10 14:36:16 +0000 | [diff] [blame] | 76 | if (!stack->size || !getSymbolizer()->IsAvailable()) return; |
Kostya Serebryany | 1d333c5 | 2013-02-07 08:04:56 +0000 | [diff] [blame] | 77 | AddressInfo ai; |
Alexey Samsonov | 43fb758 | 2013-02-12 10:46:39 +0000 | [diff] [blame] | 78 | uptr pc = StackTrace::GetPreviousInstructionPc(stack->trace[0]); |
Kostya Serebryany | 70c6e3f | 2013-02-13 07:19:47 +0000 | [diff] [blame] | 79 | { |
| 80 | SymbolizerScope sym_scope; |
Alexey Samsonov | 7847d77 | 2013-09-10 14:36:16 +0000 | [diff] [blame] | 81 | getSymbolizer()->SymbolizeCode(pc, &ai, 1); |
Kostya Serebryany | 70c6e3f | 2013-02-13 07:19:47 +0000 | [diff] [blame] | 82 | } |
Alexey Samsonov | 90b0f1e | 2013-10-04 08:55:03 +0000 | [diff] [blame] | 83 | ReportErrorSummary(error_type, ai.file, ai.line, ai.function); |
Kostya Serebryany | 1d333c5 | 2013-02-07 08:04:56 +0000 | [diff] [blame] | 84 | } |
| 85 | |
Evgeniy Stepanov | db010da | 2012-12-26 09:32:05 +0000 | [diff] [blame] | 86 | void ReportUMR(StackTrace *stack, u32 origin) { |
| 87 | if (!__msan::flags()->report_umrs) return; |
| 88 | |
Alexey Samsonov | 7ed46ff | 2013-04-05 07:30:29 +0000 | [diff] [blame] | 89 | SpinMutexLock l(&CommonSanitizerReportMutex); |
Evgeniy Stepanov | db010da | 2012-12-26 09:32:05 +0000 | [diff] [blame] | 90 | |
Evgeniy Stepanov | c209ba6 | 2012-12-26 10:16:45 +0000 | [diff] [blame] | 91 | Decorator d; |
| 92 | Printf("%s", d.Warning()); |
Evgeniy Stepanov | 6ac157d | 2013-05-28 14:27:30 +0000 | [diff] [blame] | 93 | Report(" WARNING: MemorySanitizer: use-of-uninitialized-value\n"); |
Evgeniy Stepanov | c209ba6 | 2012-12-26 10:16:45 +0000 | [diff] [blame] | 94 | Printf("%s", d.End()); |
Kostya Serebryany | 70c6e3f | 2013-02-13 07:19:47 +0000 | [diff] [blame] | 95 | PrintStack(stack->trace, stack->size); |
Evgeniy Stepanov | db010da | 2012-12-26 09:32:05 +0000 | [diff] [blame] | 96 | if (origin) { |
| 97 | DescribeOrigin(origin); |
| 98 | } |
Kostya Serebryany | 1d333c5 | 2013-02-07 08:04:56 +0000 | [diff] [blame] | 99 | ReportSummary("use-of-uninitialized-value", stack); |
Evgeniy Stepanov | db010da | 2012-12-26 09:32:05 +0000 | [diff] [blame] | 100 | } |
| 101 | |
| 102 | void ReportExpectedUMRNotFound(StackTrace *stack) { |
Alexey Samsonov | 7ed46ff | 2013-04-05 07:30:29 +0000 | [diff] [blame] | 103 | SpinMutexLock l(&CommonSanitizerReportMutex); |
Evgeniy Stepanov | db010da | 2012-12-26 09:32:05 +0000 | [diff] [blame] | 104 | |
| 105 | Printf(" WARNING: Expected use of uninitialized value not found\n"); |
Kostya Serebryany | 70c6e3f | 2013-02-13 07:19:47 +0000 | [diff] [blame] | 106 | PrintStack(stack->trace, stack->size); |
Evgeniy Stepanov | db010da | 2012-12-26 09:32:05 +0000 | [diff] [blame] | 107 | } |
| 108 | |
Evgeniy Stepanov | 99bf1d7 | 2013-01-10 11:17:55 +0000 | [diff] [blame] | 109 | void ReportAtExitStatistics() { |
Alexey Samsonov | 7ed46ff | 2013-04-05 07:30:29 +0000 | [diff] [blame] | 110 | SpinMutexLock l(&CommonSanitizerReportMutex); |
| 111 | |
Evgeniy Stepanov | 99bf1d7 | 2013-01-10 11:17:55 +0000 | [diff] [blame] | 112 | Decorator d; |
| 113 | Printf("%s", d.Warning()); |
| 114 | Printf("MemorySanitizer: %d warnings reported.\n", msan_report_count); |
| 115 | Printf("%s", d.End()); |
| 116 | } |
| 117 | |
Alexey Samsonov | ba5e996 | 2013-01-30 07:45:58 +0000 | [diff] [blame] | 118 | } // namespace __msan |