Issue 5201 - [emscripten] Replace EM_ASM calls by a custom JavaScript library

compiled/debug.h

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2017 eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #pragma once
 
 #include <emscripten.h>
 #include <emscripten/trace.h>
 
 #if defined(assert)
 #undef assert
 #endif
 
 class String;
 
+extern "C"
+{
+  void LogString(const String& str);
+  void LogInteger(int i);
+  void LogPointer(const void* ptr);
+  void LogError(const String& str);
+}
+
 struct console_type
 {
   static void log(const String& str)
   {
-    EM_ASM_ARGS(console.log(readString($0)), &str);
+    LogString(str);
   }
 
   static void log(int i)
   {
-    EM_ASM_ARGS(console.log($0), i);
+    LogInteger(i);
   }
 
-  static void log(void* ptr)
+  static void log(const void* ptr)
   {
-    EM_ASM_ARGS(console.log($0), ptr);
+    LogPointer(ptr);
   }
 
   static void error(const String& str)
   {
-    EM_ASM_ARGS(console.error(new Error(readString($0)).stack), &str);
+    LogError(str);
   }
 };
 
 static console_type console;
 
 #if defined(DEBUG)
 inline void assert(bool condition, const String& str)
 {
   if (!condition)
     console.error(str);
@@ skipping 15 matching lines @@
   emscripten_trace_enter_context(context);
 #endif
 }
 
 inline void exit_context()
 {
 #if defined(__EMSCRIPTEN_TRACING__)
   emscripten_trace_exit_context();
 #endif
 }