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Electrolysis/Debugging: Difference between revisions
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= Windows = | = Windows = | ||
(''' | Debugging under Windows is very straightforward using Microsoft Visual Studio 2005 (MSVC8). | ||
'''Note :''' Debugging E10s using MSVC9 should not be any different from MSVC8. | |||
=== Creating a project === | |||
First you need a 'Makefile' project. Open the "New Project" windows by hitting CTRL-SHIFT-N. Choose "Win32 Console Application" and type in whatever name and location you want for your new project. Hit the "OK" button. | |||
Then, open your project's properties by right-clicking the project name in the "Solution Explorer" view. Choose "Makefile" for the "Configuration Type" field in the "Configuration Properties / General" section. | |||
In "General Properties / NMake" section, do the following : | |||
*type whatever make commands you want to use for building electrolysis, in the "general" subsection. | |||
*type "OS_WIN;WIN32;XP_WIN;DEBUG;_DEBUG;MOZ_IPC" in the "Preprocessor Definitions" field of the "Intellisense" subsection. | |||
In "General Properties / Debugging" section, do the following : | |||
*type "<your_objdir>\browser\dist\bin\firefox.exe" | |||
*type "-no-remote -P <your_electrolysis_profile_if_any> -chrome chrome://global/content/test-ipc.xul" | |||
*type "MOZ_DEBUG_CHILD_PROCESS=1" in the "Environment" field | |||
=== Debugging E10s === | |||
First, make sure you've got a DEBUG build. If that's the case, you're all set ! Just hit F5 in MSVC. You should see the program's console with the main process output in it. | |||
Now when the output stops updating, it means it's reached this code in nsEmbedFunctions.cpp : | |||
<pre> | |||
if (PR_GetEnv("MOZ_DEBUG_CHILD_PROCESS")) { | |||
#ifdef OS_POSIX | |||
printf("\n\nCHILDCHILDCHILDCHILD\n debug me @%d\n\n", getpid()); | |||
sleep(30); | |||
#elif defined(OS_WIN) | |||
Sleep(30000); | |||
#endif | |||
} | |||
</pre> | |||
You now have 30 seconds to hook up to the newly created child process. Do the following : | |||
*Hit CTRL-ALT-P to bring up the "attach to process" dialog | |||
*Double-click "mozilla-runtime.exe" in the "Available Processes" listbox. | |||
MSVC is going to load all the symbols from that newly attached process and, basically, you're done ! You should see two processes in your "processes" windows. You can break either one, or break all. You can switch from one to another by double-clicking on it, etc... | |||
And for a better debugging experience, don't forget to add breakpoints ! heh! | |||
= Linux = | = Linux = | ||