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>
+#include "library.h"
 
 #if defined(assert)
 #undef assert
 #endif
 
 class String;
 
 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);
 }
 #else
 #define assert(condition, str)
 #endif
 
+#if defined(__EMSCRIPTEN_TRACING__)
+#include <emscripten/trace.h>
+
+inline void init_tracing()
+{
+  emscripten_trace_configure("http://127.0.0.1:5000/", "MyApplication");
+}
+
+inline void shutdown_tracing()
+{
+  emscripten_trace_close();
+}
+
 inline void annotate_address(void* address, const char* name)
 {
-#if defined(__EMSCRIPTEN_TRACING__)
   emscripten_trace_annotate_address_type(address, name);
-#endif
 }
 
 inline void enter_context(const char* context)
 {
-#if defined(__EMSCRIPTEN_TRACING__)
   emscripten_trace_enter_context(context);
-#endif
 }
 
 inline void exit_context()
 {
-#if defined(__EMSCRIPTEN_TRACING__)
   emscripten_trace_exit_context();
-#endif
 }
+
+#else // defined(__EMSCRIPTEN_TRACING__)
+
+inline void init_tracing()
+{
+}
+
+inline void shutdown_tracing()
+{
+}
+
+inline void annotate_address(void* address, const char* name)
+{
+}
+
+inline void enter_context(const char* context)
+{
+}
+
+inline void exit_context()
+{
+}
+
+#endif // defined(__EMSCRIPTEN_TRACING__)