1 files changed, 100 insertions, 0 deletions
diff --git a/lib/msan/msan_report.cc b/lib/msan/msan_report.cc
new file mode 100644
index 0000000000000..8721089997333
--- /dev/null
+++ b/lib/msan/msan_report.cc
@@ -0,0 +1,100 @@
+//===-- 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