msan_report.cc revision 719df33ad1f14c760d53a4b7b51ff9664ebda535
1//===-- msan_report.cc ----------------------------------------------------===// 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" 16#include "sanitizer_common/sanitizer_allocator_internal.h" 17#include "sanitizer_common/sanitizer_common.h" 18#include "sanitizer_common/sanitizer_flags.h" 19#include "sanitizer_common/sanitizer_mutex.h" 20#include "sanitizer_common/sanitizer_report_decorator.h" 21#include "sanitizer_common/sanitizer_stackdepot.h" 22#include "sanitizer_common/sanitizer_symbolizer.h" 23 24using namespace __sanitizer; 25 26namespace __msan { 27 28class 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 37static void PrintStack(const uptr *trace, uptr size) { 38 SymbolizerScope sym_scope; 39 StackTrace::PrintStack(trace, size, true, 0); 40} 41 42static void DescribeOrigin(u32 origin) { 43 Decorator d; 44 Printf("\n"); 45 if (common_flags()->verbosity) 46 Printf(" raw origin id: %d\n", origin); 47 uptr pc; 48 if (const char *so = GetOriginDescrIfStack(origin, &pc)) { 49 char* s = internal_strdup(so); 50 char* sep = internal_strchr(s, '@'); 51 CHECK(sep); 52 *sep = '\0'; 53 Printf("%s", d.Origin()); 54 Printf(" %sUninitialized value was created by an allocation of '%s%s%s'" 55 " in the stack frame of function '%s%s%s'%s\n", 56 d.Origin(), d.Name(), s, d.Origin(), d.Name(), 57 getSymbolizer()->Demangle(sep + 1), d.Origin(), d.End()); 58 InternalFree(s); 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 } 66 } else { 67 uptr size = 0; 68 const uptr *trace = StackDepotGet(origin, &size); 69 Printf(" %sUninitialized value was created by a heap allocation%s\n", 70 d.Origin(), d.End()); 71 PrintStack(trace, size); 72 } 73} 74 75static void ReportSummary(const char *error_type, StackTrace *stack) { 76 if (!stack->size || !getSymbolizer()->IsAvailable()) return; 77 AddressInfo ai; 78 uptr pc = StackTrace::GetPreviousInstructionPc(stack->trace[0]); 79 { 80 SymbolizerScope sym_scope; 81 getSymbolizer()->SymbolizeCode(pc, &ai, 1); 82 } 83 ReportErrorSummary(error_type, ai.file, ai.line, ai.function); 84} 85 86void ReportUMR(StackTrace *stack, u32 origin) { 87 if (!__msan::flags()->report_umrs) return; 88 89 SpinMutexLock l(&CommonSanitizerReportMutex); 90 91 Decorator d; 92 Printf("%s", d.Warning()); 93 Report(" WARNING: MemorySanitizer: use-of-uninitialized-value\n"); 94 Printf("%s", d.End()); 95 PrintStack(stack->trace, stack->size); 96 if (origin) { 97 DescribeOrigin(origin); 98 } 99 ReportSummary("use-of-uninitialized-value", stack); 100} 101 102void ReportExpectedUMRNotFound(StackTrace *stack) { 103 SpinMutexLock l(&CommonSanitizerReportMutex); 104 105 Printf(" WARNING: Expected use of uninitialized value not found\n"); 106 PrintStack(stack->trace, stack->size); 107} 108 109void ReportAtExitStatistics() { 110 SpinMutexLock l(&CommonSanitizerReportMutex); 111 112 Decorator d; 113 Printf("%s", d.Warning()); 114 Printf("MemorySanitizer: %d warnings reported.\n", msan_report_count); 115 Printf("%s", d.End()); 116} 117 118} // namespace __msan 119