[msan] Fix __msan_check_mem_is_initialized and prettify its output.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@208195 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 11 insertions, 0 deletions

diff --git a/lib/msan/msan_report.cc b/lib/msan/msan_report.cc
index 12bac2e8c..453c81710 100644
--- a/lib/msan/msan_report.cc
+++ b/lib/msan/msan_report.cc
@@ -235,4 +235,15 @@ void DescribeMemoryRange(const void *x, uptr size) {
   }
 }
 
+void ReportUMRInsideAddressRange(const char *what, const void *start, uptr size,
+                                 uptr offset) {
+  Decorator d;
+  Printf("%s", d.Warning());
+  Printf("%sUninitialized bytes in %s%s%s at offset %zu inside [%p, %zu)%s\n",
+         d.Warning(), d.Name(), what, d.Warning(), offset, start, size,
+         d.End());
+  if (__sanitizer::common_flags()->verbosity > 0)
+    DescribeMemoryRange(start, size);
+}
+
 }  // namespace __msan