| //===-- msan_report.cc ----------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file is a part of MemorySanitizer. |
| // |
| // Error reporting. |
| //===----------------------------------------------------------------------===// |
| |
| #include "msan.h" |
| #include "sanitizer_common/sanitizer_allocator_internal.h" |
| #include "sanitizer_common/sanitizer_common.h" |
| #include "sanitizer_common/sanitizer_flags.h" |
| #include "sanitizer_common/sanitizer_mutex.h" |
| #include "sanitizer_common/sanitizer_report_decorator.h" |
| #include "sanitizer_common/sanitizer_stackdepot.h" |
| #include "sanitizer_common/sanitizer_symbolizer.h" |
| |
| using namespace __sanitizer; |
| |
| namespace __msan { |
| |
| class Decorator: private __sanitizer::AnsiColorDecorator { |
| public: |
| Decorator() : __sanitizer::AnsiColorDecorator(PrintsToTtyCached()) { } |
| const char *Warning() { return Red(); } |
| const char *Origin() { return Magenta(); } |
| const char *Name() { return Green(); } |
| const char *End() { return Default(); } |
| }; |
| |
| static void PrintStack(const uptr *trace, uptr size) { |
| SymbolizerScope sym_scope; |
| StackTrace::PrintStack(trace, size, true, 0); |
| } |
| |
| static void DescribeOrigin(u32 origin) { |
| Decorator d; |
| if (common_flags()->verbosity) |
| Printf(" raw origin id: %d\n", origin); |
| uptr pc; |
| if (const char *so = GetOriginDescrIfStack(origin, &pc)) { |
| char* s = internal_strdup(so); |
| char* sep = internal_strchr(s, '@'); |
| CHECK(sep); |
| *sep = '\0'; |
| Printf("%s", d.Origin()); |
| Printf(" %sUninitialized value was created by an allocation of '%s%s%s'" |
| " in the stack frame of function '%s%s%s'%s\n", |
| d.Origin(), d.Name(), s, d.Origin(), d.Name(), |
| getSymbolizer()->Demangle(sep + 1), d.Origin(), d.End()); |
| InternalFree(s); |
| |
| if (pc) { |
| // For some reason function address in LLVM IR is 1 less then the address |
| // of the first instruction. |
| pc += 1; |
| PrintStack(&pc, 1); |
| } |
| } else { |
| uptr size = 0; |
| const uptr *trace = StackDepotGet(origin, &size); |
| Printf(" %sUninitialized value was created by a heap allocation%s\n", |
| d.Origin(), d.End()); |
| PrintStack(trace, size); |
| } |
| } |
| |
| static void ReportSummary(const char *error_type, StackTrace *stack) { |
| if (!stack->size || !getSymbolizer()->IsAvailable()) return; |
| AddressInfo ai; |
| uptr pc = StackTrace::GetPreviousInstructionPc(stack->trace[0]); |
| { |
| SymbolizerScope sym_scope; |
| getSymbolizer()->SymbolizeCode(pc, &ai, 1); |
| } |
| ReportErrorSummary(error_type, ai.file, ai.line, ai.function); |
| } |
| |
| void ReportUMR(StackTrace *stack, u32 origin) { |
| if (!__msan::flags()->report_umrs) return; |
| |
| SpinMutexLock l(&CommonSanitizerReportMutex); |
| |
| Decorator d; |
| Printf("%s", d.Warning()); |
| Report(" WARNING: MemorySanitizer: use-of-uninitialized-value\n"); |
| Printf("%s", d.End()); |
| PrintStack(stack->trace, stack->size); |
| if (origin) { |
| DescribeOrigin(origin); |
| } |
| ReportSummary("use-of-uninitialized-value", stack); |
| } |
| |
| void ReportExpectedUMRNotFound(StackTrace *stack) { |
| SpinMutexLock l(&CommonSanitizerReportMutex); |
| |
| Printf(" WARNING: Expected use of uninitialized value not found\n"); |
| PrintStack(stack->trace, stack->size); |
| } |
| |
| void ReportAtExitStatistics() { |
| SpinMutexLock l(&CommonSanitizerReportMutex); |
| |
| Decorator d; |
| Printf("%s", d.Warning()); |
| Printf("MemorySanitizer: %d warnings reported.\n", msan_report_count); |
| Printf("%s", d.End()); |
| } |
| |
| } // namespace __msan |