Hi everybody,
I am pleased to announce that I have landed bug 1581971, which adds
support for using `mach run --debug` with GeckoView and jdb+lldb!
To use it, you will need to re-bootstrap and re-configure your GeckoView
build.
Furthermore, if you explicitly set the location of your Android NDK in
your mozconfig via `--with-android-ndk`, you will now need to point it
to a directory containing NDK r21d.
I would also like to introduce a couple of GeckoView-specific flags that
are now available when executing `mach run --debug`:
By default, `mach run --debug` kills any existing instances of the app,
and then starts a new app instance for debugging. The
`--use-existing-process` flag tells mach not to kill any existing
processes belonging to the app, and instead attach to a pre-existing
process. This is useful when you have the app in a specific state and
would then like to attach to the app while it is in that state. mach
will prompt the user to select a target process if necessary.
The `--no-attach` flag tells mach to set up the requisite debugger
listeners on your device/emulator without starting the debugger clients
themselves. Instead, mach will print the required connection information
to stdout. This is intended for users who prefer to start and configure
jdb/lldb manually instead of having mach do it for them.
I intentionally did not implement support for gdb -- I wanted to
implement the mach equivalent of what Android Studio uses, which is
lldb. If you want gdb support, you're welcome to file a bug for it, but
be advised that do not personally intend to implement that. Patches
welcome! ;-)
- Aaron
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