[ASan/RTL] Disable colored reporting on Windows

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@188545 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/asan/asan_report.cc b/lib/asan/asan_report.cc
index f5c67f1..d6d7d9c 100644
--- a/lib/asan/asan_report.cc
+++ b/lib/asan/asan_report.cc
@@ -45,6 +45,11 @@
 
 // ---------------------- Decorator ------------------------------ {{{1
 bool PrintsToTtyCached() {
+  // FIXME: Add proper Windows support to AnsiColorDecorator and re-enable color
+  // printing on Windows.
+  if (SANITIZER_WINDOWS)
+    return 0;
+
   static int cached = 0;
   static bool prints_to_tty;
   if (!cached) {  // Ok wrt threads since we are printing only from one thread.
diff --git a/lib/sanitizer_common/sanitizer_report_decorator.h b/lib/sanitizer_common/sanitizer_report_decorator.h
index 49334d5..eef2b15 100644
--- a/lib/sanitizer_common/sanitizer_report_decorator.h
+++ b/lib/sanitizer_common/sanitizer_report_decorator.h
@@ -19,6 +19,8 @@
 
 namespace __sanitizer {
 class AnsiColorDecorator {
+  // FIXME: This is not portable. It assumes the special strings are printed to
+  // stdout, which is not the case on Windows (see SetConsoleTextAttribute()).
  public:
   explicit AnsiColorDecorator(bool use_ansi_colors) : ansi_(use_ansi_colors) { }
   const char *Bold()    const { return ansi_ ? "\033[1m" : ""; }