[compiler-rt] [compiler-rt][rtsan] Create colorized reports (PR #109419)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-compiler-rt-sanitizer

Author: Chris Apple (cjappl)

<details>
<summary>Changes</summary>

Mostly following asan here.

Our resulting color choices look like this on dark background

<img width="661" alt="Screenshot 2024-09-20 at 7 26 46 AM" src="https://github.com/user-attachments/assets/0765d2ff-e5a3-426a-b2d0-e3ef68b86b9c">


And this on white:

<img width="633" alt="Screenshot 2024-09-20 at 7 27 45 AM" src="https://github.com/user-attachments/assets/7d78f7f5-19a4-4c99-814d-e3412b8fa4f6">



---
Full diff: https://github.com/llvm/llvm-project/pull/109419.diff


1 Files Affected:

- (modified) compiler-rt/lib/rtsan/rtsan_context.cpp (+16-2) 


``````````diff
diff --git a/compiler-rt/lib/rtsan/rtsan_context.cpp b/compiler-rt/lib/rtsan/rtsan_context.cpp
index e69fb259798d94..9cf15207e63840 100644
--- a/compiler-rt/lib/rtsan/rtsan_context.cpp
+++ b/compiler-rt/lib/rtsan/rtsan_context.cpp
@@ -14,6 +14,7 @@
 #include <rtsan/rtsan_stack.h>
 
 #include <sanitizer_common/sanitizer_allocator_internal.h>
+#include <sanitizer_common/sanitizer_report_decorator.h>
 #include <sanitizer_common/sanitizer_stacktrace.h>
 
 #include <new>
@@ -91,15 +92,28 @@ bool __rtsan::Context::InRealtimeContext() const { return realtime_depth_ > 0; }
 
 bool __rtsan::Context::IsBypassed() const { return bypass_depth_ > 0; }
 
+namespace {
+class Decorator : public __sanitizer::SanitizerCommonDecorator {
+public:
+  Decorator() : SanitizerCommonDecorator() {}
+  const char *FunctionName() { return Green(); }
+  const char *Reason() { return Blue(); }
+};
+} // namespace
+
 void __rtsan::PrintDiagnostics(const char *intercepted_function_name, uptr pc,
                                uptr bp) {
   ScopedErrorReportLock l;
 
+  Decorator d;
+  Printf("%s", d.Error());
   Report("ERROR: RealtimeSanitizer: unsafe-library-call\n");
+  Printf("%s", d.Reason());
   Printf("Intercepted call to real-time unsafe function "
-         "`%s` in real-time context!\n",
-         intercepted_function_name);
+         "`%s%s%s` in real-time context!\n",
+         d.FunctionName(), intercepted_function_name, d.Reason());
 
+  Printf("%s", d.Default());
   __rtsan::PrintStackTrace(pc, bp);
 }
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/109419