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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_common.h"
#include "sanitizer_common/sanitizer_mutex.h"
#include "sanitizer_common/sanitizer_report_decorator.h"
#include "sanitizer_common/sanitizer_stackdepot.h"
using namespace __sanitizer;
static StaticSpinMutex report_mu;
namespace __msan {
static bool PrintsToTtyCached() {
static int cached = 0;
static bool prints_to_tty;
if (!cached) { // Ok wrt threads since we are printing only from one thread.
prints_to_tty = PrintsToTty();
cached = 1;
}
return prints_to_tty;
}
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 DescribeOrigin(u32 origin) {
Decorator d;
if (flags()->verbosity)
Printf(" raw origin id: %d\n", origin);
if (const char *so = __msan_get_origin_descr_if_stack(origin)) {
char* s = internal_strdup(so);
char* sep = internal_strchr(s, '@');
CHECK(sep);
*sep = '\0';
Printf("%s", d.Origin());
Printf(" %sUninitialised 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(), sep + 1,
d.Origin(), d.End());
InternalFree(s);
} else {
uptr size = 0;
const uptr *trace = StackDepotGet(origin, &size);
Printf(" %sUninitialised value was created by a heap allocation%s\n",
d.Origin(), d.End());
StackTrace::PrintStack(trace, size, true, "", 0);
}
}
void ReportUMR(StackTrace *stack, u32 origin) {
if (!__msan::flags()->report_umrs) return;
GenericScopedLock<StaticSpinMutex> lock(&report_mu);
Decorator d;
Printf("%s", d.Warning());
Report(" WARNING: Use of uninitialized value\n");
Printf("%s", d.End());
StackTrace::PrintStack(stack->trace, stack->size, true, "", 0);
if (origin) {
DescribeOrigin(origin);
}
}
void ReportExpectedUMRNotFound(StackTrace *stack) {
GenericScopedLock<StaticSpinMutex> lock(&report_mu);
Printf(" WARNING: Expected use of uninitialized value not found\n");
StackTrace::PrintStack(stack->trace, stack->size, true, "", 0);
}
void ReportAtExitStatistics() {
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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