In this patch I introduce a new actor: PServiceWorkerUpdater managed by
PServiceWorkerManager and running on PBackground. Each time a SoftUpdate() or
Update() operation starts, a PServiceWorkerUpdater is used for having a unique
lock for the update of a particular scope+originAttributes.
The implementation happens on the PBackground thread of the parent process,
where all these PServiceWorkerUpdater actors are taken in an array and, only
the first one for each scope+originAttributes is activated.
Without this change, we will call WorkerPrefChanged if a pref whose name just
_starts_ with the name of one of our WORKER_SIMPLE_PREF prefs changes. Then in
WorkerPrefChanged we will get the value of the pref that changed, and store it
under the key identified by the closure, thus writing the value of an incorrect
pref in there.
MozReview-Commit-ID: JTsvvtC5P1o
Currently, JS sampling has major problems.
- JS sampling is enabled for all JS threads from the thread that runs
locked_profiler_start() -- currently only the main thread -- but the JS
engine can't handle enabling from off-thread, and asserts. This makes
profiling workers impossible in a debug build.
- No JS thread will be JS sampled unless enableJSSampling() is called, but that
only happens in locked_profiler_start(). That means any worker threads
created while the profiler is active won't be JS sampled.
- Only the thread that runs locked_profiler_stop() -- currently only the main
thread -- ever calls disableJSSampling(). This means that worker threads that
start being JS sampled never stop being JS sampled.
This patch fixes these three problems in the following ways.
- locked_profiler_start() now sets a flag in PseudoStack that indicates
JS sampling is desired, but doesn't directly enable it. Instead, the JS
thread polls that flag and enables JS sampling itself when it sees the flag
is set. The polling is done by the interrupt callback. There was already a
flag of this sort (mJSSampling) but the new one is better.
This required adding a call to profiler_js_operation_callback() to the
InterruptCallback() in XPCJSContext.cpp. (In comparison, the
InterruptCallback() in dom/workers/RuntimeService.cpp already had such a
call.)
- RegisterCurrentThread() now requests JS sampling of a JS thread when the
profiler is active, the thread is being profiled, and JS sampling is enabled.
- locked_profiler_stop() now calls stopJSSampling() on all live threads.
The patch makes the following smaller changes as well.
- Renames profiler_js_operation_callback() as profiler_js_interrupt_callback(),
because "interrupt callback" is the standard name (viz.
JS_AddInterruptCallback()).
- Calls js::RegisterContextProfilingEventMarker() with nullptr when stopping
JS sampling, so that ProfilerJSEventMarker won't fire unnecessarily.
- Some minor formatting changes.
--HG--
extra : rebase_source : 372f94c963a9e5b2493389892499b1ca205ebc2f
PseudoContext::sampleContext() is always called immediately after
profiler_get_pseudo_stack(). This patch introduces profiler_set_js_context()
and profiler_clear_js_context(), which replace the profiler_get_pseudo_stack()
+ sampleContext() pairs. This takes us a step closer to not having to export
PseudoStack outside the profiler.
--HG--
extra : rebase_source : 8558d1600eafd395cc696d31f3d21fb52a1a74b0
These prefs have been added close to two years ago:
dom.url.encode_decode_hash and dom.url.getters_decode_hash
The main reason for their existence was in case we encounter any web-compat issues. At this point the extra code is mostly useless, and flipping the pref may lead to crashes.
MozReview-Commit-ID: LhAHkYmv0TR
--HG--
extra : rebase_source : 8f2d50d5633496cf165b3925d952bb6475bce3e0
This patch is generated by the following sed script:
find . ! -wholename '*/.hg*' -type f \( -iname '*.html' -o -iname '*.xhtml' -o -iname '*.xul' -o -iname '*.js' \) -exec sed -i -e 's/\(\(text\|application\)\/javascript\);version=1.[0-9]/\1/g' {} \;
MozReview-Commit-ID: AzhtdwJwVNg
--HG--
extra : rebase_source : e8f90249454c0779d926f87777f457352961748d
