[PATCH] D60589: [sanitizer_common] Expose a variadic version of the sanitizer Printf function.

[Mitch Phillips via Phabricator via llvm-commits]

hctim created this revision.
hctim added reviewers: pcc, eugenis.
Herald added subscribers: Sanitizers, kubamracek.
Herald added projects: Sanitizers, LLVM.

Allows users of sanitizer printf() to create wrappers around the sanitizer Printf function. Used in GWP-ASan to allow us to default-provide a function pointer to Printf(), as the signature taken by GWP-ASan arguments has an 'int' return type.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D60589

Files:
  compiler-rt/lib/sanitizer_common/sanitizer_common.h
  compiler-rt/lib/sanitizer_common/sanitizer_printf.cc


Index: compiler-rt/lib/sanitizer_common/sanitizer_printf.cc
===================================================================
--- compiler-rt/lib/sanitizer_common/sanitizer_printf.cc
+++ compiler-rt/lib/sanitizer_common/sanitizer_printf.cc
@@ -322,6 +322,10 @@
   va_end(args);
 }
 
+void VariadicPrintf(const char *format, va_list ap) {
+  SharedPrintfCode(false, format, ap);
+}
+
 // Like Printf, but prints the current PID before the output string.
 FORMAT(1, 2)
 void Report(const char *format, ...) {
Index: compiler-rt/lib/sanitizer_common/sanitizer_common.h
===================================================================
--- compiler-rt/lib/sanitizer_common/sanitizer_common.h
+++ compiler-rt/lib/sanitizer_common/sanitizer_common.h
@@ -22,6 +22,8 @@
 #include "sanitizer_list.h"
 #include "sanitizer_mutex.h"
 
+#include <stdarg.h>
+
 #if defined(_MSC_VER) && !defined(__clang__)
 extern "C" void _ReadWriteBarrier();
 #pragma intrinsic(_ReadWriteBarrier)
@@ -186,6 +188,7 @@
 bool ColorizeReports();
 void RemoveANSIEscapeSequencesFromString(char *buffer);
 void Printf(const char *format, ...);
+void VariadicPrintf(const char *format, va_list ap);
 void Report(const char *format, ...);
 void SetPrintfAndReportCallback(void (*callback)(const char *));
 #define VReport(level, ...)                                              \


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