1257477 - No longer possible to remote debug Firefox -app (aka xulrunner app) since 44

Status: RESOLVED DUPLICATE of bug 1244163

(DevTools :: General, defect)

Description

[Duan Yao]

Attachment: test case: remoteDebug44.zip

User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0
Build ID: 20160303134406

Steps to reproduce:

Try to start debug server in "Firefox -app" mode with Firefox 44 like this:

const portOrPath = 6101;
const Cu = Components.utils;
try {
  let { DevToolsLoader } =
    Cu.import("resource://gre/modules/devtools/Loader.jsm", {});
    //Cu.import("resource://devtools/shared/Loader.jsm", {});

  let serverLoader = new DevToolsLoader();
  serverLoader.invisibleToDebugger = true;
  serverLoader.main("devtools/server/main");
  let debuggerServer = serverLoader.DebuggerServer;
  debuggerServer.init();
  debuggerServer.addBrowserActors();
  debuggerServer.allowChromeProcess = true;

  let listener = debuggerServer.createListener();
  listener.portOrPath = portOrPath;
  listener.open();
  dump(">>>>>Started debugger server on " + portOrPath + "\n");
} catch (e) {
  dump(">>>>>Unable to start debugger server on " + portOrPath + ": " + e + "\n");
}

You can use the attachment to reproduce: firefox -app remoteDebug44/application.ini -console


Actual results:

Error raised at this line: `Cu.import("resource://gre/modules/devtools/Loader.jsm", {})`:

>>>>>Unable to start debugger server on 6101: [Exception... "Component returned failure code: 0x80040111 (NS_ERROR_NOT_AVAILABLE) [nsIXPCComponents_Utils.import]"  nsresult: "0x80040111 (NS_ERROR_NOT_AVAILABLE)"  location: "JS frame :: resource://gre/modules/devtools/Loader.jsm :: <TOP_LEVEL> :: line 35"  data: no]




Expected results:

Debugger server should start successfully.

This works with Firefox 39-43 but not 44+.

I digged this issue a bit, and found that since Firefox 44, some devtools files required to start the debugger server was moved to <Firefox_dir>/browser/omni.ja , notably chrome/devtools/modules/devtools/shared/Loader.jsm (mapped to resource://devtools/shared/Loader.jsm). Such files are not accessible in Firefox -app mode.

I tried to extract chrome/devtools/modules/devtools and chrome/zh-CN/locale/zh-CN/devtools from <Firefox_dir>/browser/omni.ja and copy them to my app. The debugger server can start, but still can't connect to it, but I think this may be another issue.