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//===-- 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) {
StackTrace::PrintStack(trace, size);
Printf("\n");
}
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(),
Symbolizer::Get()->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 || !Symbolizer::Get()->IsAvailable()) return;
AddressInfo ai;
uptr pc = StackTrace::GetPreviousInstructionPc(stack->trace[0]);
Symbolizer::Get()->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
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