[msan] Refactor report printing.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@171105 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 64 insertions, 0 deletions

diff --git a/lib/msan/msan_report.cc b/lib/msan/msan_report.cc
new file mode 100644
index 000000000..a1a1bee63
--- /dev/null
+++ b/lib/msan/msan_report.cc
@@ -0,0 +1,64 @@
+//===-- 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_stackdepot.h"
+
+using namespace __sanitizer;
+
+static StaticSpinMutex report_mu;
+
+namespace __msan {
+
+static void DescribeOrigin(u32 origin) {
+  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("  Uninitialised value was created by an allocation of '%s'"
+           " in the stack frame of function '%s'\n", s, sep + 1);
+    InternalFree(s);
+  } else {
+    uptr size = 0;
+    const uptr *trace = StackDepotGet(origin, &size);
+    Printf("  Uninitialised value was created by a heap allocation\n");
+    StackTrace::PrintStack(trace, size, true, "", 0);
+  }
+}
+
+void ReportUMR(StackTrace *stack, u32 origin) {
+  if (!__msan::flags()->report_umrs) return;
+
+  GenericScopedLock<StaticSpinMutex> lock(&report_mu);
+
+  Report(" WARNING: Use of uninitialized value\n");
+  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);
+}
+
+}  // namespace msan