forked from OSchip/llvm-project
121 lines
3.6 KiB
C++
121 lines
3.6 KiB
C++
//===-- msan_report.cc ----------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of MemorySanitizer.
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//
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// Error reporting.
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//===----------------------------------------------------------------------===//
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#include "msan.h"
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#include "sanitizer_common/sanitizer_common.h"
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#include "sanitizer_common/sanitizer_mutex.h"
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#include "sanitizer_common/sanitizer_report_decorator.h"
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#include "sanitizer_common/sanitizer_stackdepot.h"
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#include "sanitizer_common/sanitizer_symbolizer.h"
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using namespace __sanitizer;
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static StaticSpinMutex report_mu;
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namespace __msan {
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static bool PrintsToTtyCached() {
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static int cached = 0;
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static bool prints_to_tty;
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if (!cached) { // Ok wrt threads since we are printing only from one thread.
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prints_to_tty = PrintsToTty();
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cached = 1;
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}
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return prints_to_tty;
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}
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class Decorator: private __sanitizer::AnsiColorDecorator {
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public:
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Decorator() : __sanitizer::AnsiColorDecorator(PrintsToTtyCached()) { }
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const char *Warning() { return Red(); }
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const char *Origin() { return Magenta(); }
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const char *Name() { return Green(); }
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const char *End() { return Default(); }
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};
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static void PrintStack(const uptr *trace, uptr size) {
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SymbolizerScope sym_scope;
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StackTrace::PrintStack(trace, size, true, flags()->strip_path_prefix, 0);
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}
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static void DescribeOrigin(u32 origin) {
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Decorator d;
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if (flags()->verbosity)
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Printf(" raw origin id: %d\n", origin);
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if (const char *so = __msan_get_origin_descr_if_stack(origin)) {
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char* s = internal_strdup(so);
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char* sep = internal_strchr(s, '@');
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CHECK(sep);
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*sep = '\0';
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Printf("%s", d.Origin());
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Printf(" %sUninitialized value was created by an allocation of '%s%s%s'"
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" in the stack frame of function '%s%s%s'%s\n",
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d.Origin(), d.Name(), s, d.Origin(), d.Name(), sep + 1,
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d.Origin(), d.End());
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InternalFree(s);
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} else {
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uptr size = 0;
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const uptr *trace = StackDepotGet(origin, &size);
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Printf(" %sUninitialized value was created by a heap allocation%s\n",
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d.Origin(), d.End());
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PrintStack(trace, size);
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}
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}
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static void ReportSummary(const char *error_type, StackTrace *stack) {
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if (!stack->size || !IsSymbolizerAvailable()) return;
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AddressInfo ai;
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uptr pc = StackTrace::GetPreviousInstructionPc(stack->trace[0]);
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{
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SymbolizerScope sym_scope;
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SymbolizeCode(pc, &ai, 1);
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}
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ReportErrorSummary(error_type,
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StripPathPrefix(ai.file, flags()->strip_path_prefix),
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ai.line, ai.function);
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}
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void ReportUMR(StackTrace *stack, u32 origin) {
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if (!__msan::flags()->report_umrs) return;
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GenericScopedLock<StaticSpinMutex> lock(&report_mu);
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Decorator d;
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Printf("%s", d.Warning());
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Report(" WARNING: Use of uninitialized value\n");
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Printf("%s", d.End());
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PrintStack(stack->trace, stack->size);
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if (origin) {
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DescribeOrigin(origin);
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}
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ReportSummary("use-of-uninitialized-value", stack);
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}
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void ReportExpectedUMRNotFound(StackTrace *stack) {
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GenericScopedLock<StaticSpinMutex> lock(&report_mu);
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Printf(" WARNING: Expected use of uninitialized value not found\n");
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PrintStack(stack->trace, stack->size);
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}
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void ReportAtExitStatistics() {
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Decorator d;
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Printf("%s", d.Warning());
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Printf("MemorySanitizer: %d warnings reported.\n", msan_report_count);
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Printf("%s", d.End());
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}
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} // namespace __msan
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