[sanitizer] Add a flag to enable/disable report colorization.

llvm-svn: 202249

compiler-rt/lib/sanitizer_common/sanitizer_common.h

@@ -124,6 +124,7 @@ void RawWrite(const char *buffer);
 bool PrintsToTty();
 // Caching version of PrintsToTty(). Not thread-safe.
 bool PrintsToTtyCached();
+bool ColorizeReports();
 void Printf(const char *format, ...);
 void Report(const char *format, ...);
 void SetPrintfAndReportCallback(void (*callback)(const char *));

compiler-rt/lib/sanitizer_common/sanitizer_common_libcdep.cc

@@ -12,6 +12,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "sanitizer_common.h"
+#include "sanitizer_flags.h"
 
 namespace __sanitizer {
 
@@ -34,4 +35,10 @@ bool PrintsToTtyCached() {
   }
   return prints_to_tty;
 }
+
+bool ColorizeReports() {
+  const char *flag = common_flags()->color;
+  return internal_strcmp(flag, "always") == 0 ||
+         (internal_strcmp(flag, "auto") == 0 && PrintsToTtyCached());
+}
 }  // namespace __sanitizer

compiler-rt/lib/sanitizer_common/sanitizer_flags.cc

@@ -42,6 +42,7 @@ void SetCommonFlagsDefaults(CommonFlags *f) {
   f->use_sigaltstack = false;
   f->detect_deadlocks = false;
   f->clear_shadow_mmap_threshold = 64 * 1024;
+  f->color = "auto";
 }
 
 void ParseCommonFlagsFromString(CommonFlags *f, const char *str) {
@@ -66,6 +67,7 @@ void ParseCommonFlagsFromString(CommonFlags *f, const char *str) {
   ParseFlag(str, &f->detect_deadlocks, "detect_deadlocks");
   ParseFlag(str, &f->clear_shadow_mmap_threshold,
             "clear_shadow_mmap_threshold");
+  ParseFlag(str, &f->color, "color");
 
   // Do a sanity check for certain flags.
   if (f->malloc_context_size < 1)

compiler-rt/lib/sanitizer_common/sanitizer_flags.h

@@ -76,6 +76,8 @@ struct CommonFlags {
   // Large shadow regions are zero-filled using mmap(NORESERVE) instead of
   // memset. This is the threshold size in bytes.
   uptr clear_shadow_mmap_threshold;
+  // Colorize reports: (always|never|auto).
+  const char *color;
 };
 
 inline CommonFlags *common_flags() {

compiler-rt/lib/sanitizer_common/sanitizer_report_decorator.h

@@ -17,6 +17,8 @@
 #ifndef SANITIZER_REPORT_DECORATOR_H
 #define SANITIZER_REPORT_DECORATOR_H
 
+#include "sanitizer_common.h"
+
 namespace __sanitizer {
 class AnsiColorDecorator {
   // FIXME: This is not portable. It assumes the special strings are printed to
@@ -40,7 +42,7 @@ class AnsiColorDecorator {
 class SanitizerCommonDecorator: protected AnsiColorDecorator {
  public:
   SanitizerCommonDecorator()
-      : __sanitizer::AnsiColorDecorator(PrintsToTtyCached()) { }
+      : __sanitizer::AnsiColorDecorator(ColorizeReports()) { }
   const char *Warning()    { return Red(); }
   const char *EndWarning() { return Default(); }
 };