Fix printf formats

src/base/platform/platform.h

Index: src/base/platform/platform.h
diff --git a/src/base/platform/platform.h b/src/base/platform/platform.h
index 5b2dbc9a0b29831865f082ce0fd25024754ff541..84d9db5b9356a34a050e2f92edf07d97699cbb03 100644
--- a/src/base/platform/platform.h
+++ b/src/base/platform/platform.h
@@ -26,6 +26,7 @@
 #include <vector>
 
 #include "src/base/build_config.h"
+#include "src/base/compiler-specific.h"
 #include "src/base/platform/mutex.h"
 #include "src/base/platform/semaphore.h"
 
@@ -154,18 +155,19 @@ class OS {
   // Print output to console. This is mostly used for debugging output.
   // On platforms that has standard terminal output, the output
   // should go to stdout.
-  static void Print(const char* format, ...);
-  static void VPrint(const char* format, va_list args);
+  static PRINTF_FORMAT(1, 2) void Print(const char* format, ...);
+  static PRINTF_FORMAT(1, 0) void VPrint(const char* format, va_list args);
 
   // Print output to a file. This is mostly used for debugging output.
-  static void FPrint(FILE* out, const char* format, ...);
-  static void VFPrint(FILE* out, const char* format, va_list args);
+  static PRINTF_FORMAT(2, 3) void FPrint(FILE* out, const char* format, ...);
+  static PRINTF_FORMAT(2, 0) void VFPrint(FILE* out, const char* format,
+                                          va_list args);
 
   // Print error output to console. This is mostly used for error message
   // output. On platforms that has standard terminal output, the output
   // should go to stderr.
-  static void PrintError(const char* format, ...);
-  static void VPrintError(const char* format, va_list args);
+  static PRINTF_FORMAT(1, 2) void PrintError(const char* format, ...);
+  static PRINTF_FORMAT(1, 0) void VPrintError(const char* format, va_list args);
 
   // Allocate/Free memory used by JS heap. Pages are readable/writable, but
   // they are not guaranteed to be executable unless 'executable' is true.
@@ -222,11 +224,10 @@ class OS {
 
   // Safe formatting print. Ensures that str is always null-terminated.
   // Returns the number of chars written, or -1 if output was truncated.
-  static int SNPrintF(char* str, int length, const char* format, ...);
-  static int VSNPrintF(char* str,
-                       int length,
-                       const char* format,
-                       va_list args);
+  static PRINTF_FORMAT(3, 4) int SNPrintF(char* str, int length,
+                                          const char* format, ...);
+  static PRINTF_FORMAT(3, 0) int VSNPrintF(char* str, int length,
+                                           const char* format, va_list args);
 
   static char* StrChr(char* str, int c);
   static void StrNCpy(char* dest, int length, const char* src, size_t n);