Re: Proposal: remove support for running desktop Firefox in single-process mode (e10s disabled) anywhere but in tests

[Aaron Klotz]

On 6/10/2020 2:09 PM, tom...@gmail.com wrote:

* GeckoView still supports running in non-e10s mode, and inability to mimic 
that environment on desktop builds would complicate writing code that works on 
android.



GeckoView's only technical reason for supporting non-e10s was FxR, but 
they have since switched to e10s we can (and want to) deprecate GV 
support for non-e10s.


- Aaron
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Using MOZ_LOG for Rust code

[Valentin Gosu]

Hi everyone,

Bug 1624090  and bug
1636888  which just
landed added the possibility to forward rust logging into the Gecko logger,
so it can now be captured using MOZ_LOG and MOZ_LOG_FILE

A few things to keep in mind:

1. When parsing modules in MOZ_LOG, the ones containing :: are considered
to be rust modules, so those are the ones we enable logging for. So if you
want to log everything in a top module like neqo_transport, you will have
to specify it as neqo_transport::*

Example:
*MOZ_LOG=timestamp,sync,nsHostResolver:5,neqo_transport::*:5,proxy:5*

If you're logging things in a submodule for example neqo_transport::recovery
you don't need the ::* at the end, but if it's there it will still work.
So these are both accepted
MOZ_LOG=timestamp,sync,neqo_transport::recovery:5
MOZ_LOG=timestamp,sync,neqo_transport::recovery::*:5

2. Due to us setting the release_max_level_info feature messages logged
with debug! or  trace! will not show up in non-debug builds. The way we
fixed that for neqo code was to add a separate macro that logs regardless
of the release_max_level.
See 1611990  for more
info.

3. When using both MOZ_LOG and RUST_LOG, modules that are specified in
MOZ_LOG will not appear in RUST_LOG.

Please try it out and let me know if you run into any issues.

Thanks!
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