It is only called in a single place, and can't be called from JS, so
inline it and eliminate it.
MozReview-Commit-ID: DWfyfoO5Zht
--HG--
extra : rebase_source : 8a44719af22a4d8724449d6225f4bdd119d648c8
Also, one unused include of nsIProgrammingLanguage, which is unrelated.
MozReview-Commit-ID: LJf2NSwmaYG
--HG--
extra : rebase_source : 63dfca9185535dbfa695cf2f383d81a14ce423c0
The main reason to not do this would be performance (avoiding the
addref/release), but there are two main mitigating factors:
1) All calls to UnwrapReflectorToISupports that pass in a Web IDL object
already do the addref (and in fact QI). So this only affects the
XPCWrappedNative case.
2) The vast majority of the callers proceed to QI on the pointer anyway, and a
second addref is cheap; it's the first addref after a CC that can be
expensive on a cycle-collected object.
Going through the changes one by one:
* In GlobalObject::GetAsSupports, we do have a change that slightly slows down
precisely in the XPCWrappedNative global case. That's the message managers
and the backstagepass. And this really only affects calls to Web IDL statics
from those globals.
* In UnwrapArgImpl we're talking about a Web IDL method taking an "external
interface" type, and the UnwrapReflectorToISupports call is immediately
followed by QI anyway.
* In UnwrapXPConnectImpl we're talking about the case when we have a
non-WebIDL-object implementation of a Web IDL interface. Again, this is the
message manager globals, for EventTarget. And we have a QI call immediately
after the UnwrapReflectorToISupports.
* In the generated HasInstance hook for EventTarget we will be slightly slower
when the LHS of the instanceof is an XPCWrappedNative. And not much slower,
because again there's an immediate QI.
* In InstallXBLField we're never going to have an XPCWrappedNative as thisObj;
it's always an Element in practice. So this is no more expensive than before.
* In sandbox's GetPrincipalOrSOP we now have an extra addref. But it was
followed by various QIs anyway.
* In XPCConvert::JSValToXPCException we have an extra addref if someone throws
an XPCWrappedNative, which is fairly unlikely; our actual Exception objects
are on Web IDL bindings. Plus we have an immediate QI.
* In xpc::HasInstance we have an extra addred if the LHS of instanceof is an
XPCWrappedNative. But, again, there's an immediated QI after the
UnwrapReflectorToISupports.
* In xpcJSWeakReference::Init we are likely doing an extra addref, but again
immediately followed by QI.
I think it's worth making this change just to remove the footgun and that the
perf impact, if any, is pretty minimal.
Most of these changes are just replacements of GetNativeOfWrapper with
UnwrapReflectorToISupports, which is all it did under the hood.
The other changes are as follows:
* In nsDOMClassInfo, we really care whether we have a window, so we can just
UNWRAP_OBJECT to the Window interface, since Window is always on Web IDL
bindings now. Also, the weird compartment check hasn't been needed ever since
GetNativeOfWrapper stopped returning things off the passed-in object's
prototype chain (Firefox 22, bug 658909).
* The only use of do_QueryWrapper was to get a Window in nsDocument; again we
can UNWRAP_OBJECT.
* In XPCJSRuntime, we again just want to check for a Window, so UNWRAP_OBJECT.
The existing code uses various intermediate objects, but the only
thing they are used for now is to figure out if the compartment we're
in has the system principal or not, so just compute that directly.
MozReview-Commit-ID: FMoWfAX8rGW
--HG--
extra : rebase_source : 385ab0e10a0c719155c48e3822e7844434f417f8
xpcshell has a custom directory provider that is passed in when XPCOM is
initialized. XPCOM holds a reference to this directory provider, and
said reference is not released until XPCOM is shutdown. Unfortunately,
the lifetime of the directory provider was not scoped properly, so it
would actually be destructed prior to shutting down XPCOM, resulting in
a stack use-after-free.
To avoid this problem, we need to move the provider so that its lifetime
outlives the call to both XPCOM init and shutdown.
Removing the redundant unwrapping improves ~15% for the micro benchmark (bug
1348095 comment 3) on my desktop. Replace the parameter jsWrapper of
resolveOwnProperty() because it is not used.
MozReview-Commit-ID: ULHX8vyMrZ
--HG--
extra : rebase_source : b76e688f53722cfd24466668b68043366f25e917
This patch makes the following changes to the macros.
- Removes PROFILER_LABEL_FUNC. It's only suitable for use in functions outside
classes, due to PROFILER_FUNCTION_NAME not getting class names, and it was
mostly misused.
- Removes PROFILER_FUNCTION_NAME. It's no longer used, and __func__ is
universally available now anyway.
- Combines the first two string literal arguments of PROFILER_LABEL and
PROFILER_LABEL_DYNAMIC into a single argument. There was no good reason for
them to be separate, and it forced a '::' in the label, which isn't always
appropriate. Also, the meaning of the "name_space" argument was interpreted
in an interesting variety of ways.
- Adds an "AUTO_" prefix to PROFILER_LABEL and PROFILER_LABEL_DYNAMIC, to make
it clearer they construct RAII objects rather than just being function calls.
(I myself have screwed up the scoping because of this in the past.)
- Fills in the 'js::ProfileEntry::Category::' qualifier within the macro, so
the caller doesn't need to. This makes a *lot* more of the uses fit onto a
single line.
The patch also makes the following changes to the macro uses (beyond those
required by the changes described above).
- Fixes a bunch of labels that had gotten out of sync with the name of the
class and/or function that encloses them.
- Removes a useless PROFILER_LABEL use within a trivial scope in
EventStateManager::DispatchMouseOrPointerEvent(). It clearly wasn't serving
any useful purpose. It also serves as extra evidence that the AUTO_ prefix is
a good idea.
- Tweaks DecodePool::SyncRunIf{Preferred,Possible} so that the labelling is
done within them, instead of at their callsites, because that's a more
standard way of doing things.
--HG--
extra : rebase_source : 318d1bc6fc1425a94aacbf489dd46e4f83211de4
This patch gives some structure and order to the profiler's API.
It also renames AutoProfilerRegister as AutoProfilerRegisterThread, to match
profiler_register_thread().
This patch reduces the differences between builds where the profiler is enabled
and those where the profiler is disabled. It does this by removing numerous
MOZ_GECKO_PROFILER checks.
These changes have the following consequences.
- Various functions and classes are now defined in all builds, and so can be
used unconditionally: profiler_add_marker(), profiler_set_js_context(),
profiler_clear_js_context(), profiler_get_pseudo_stack(), AutoProfilerLabel.
(They are effectively no-ops in non-profiler builds, of course.)
- The no-op versions of PROFILER_* are now gone. The remaining versions are
almost no-ops when the profiler isn't built.
--HG--
extra : rebase_source : 8fb5e8757600210c2f77865694d25162f0b7698a
This is useful for legacy addons as we increasingly lockdown filesystem access
in content processes.
MozReview-Commit-ID: AZbsSFpbIvt
--HG--
extra : rebase_source : 56dfe91ac9fbeb0bd48dc8a2f87ed6038e7521cc
SetLocationForGlobal is called on globals created for JSMs to give
them a nice name for about:memory. Right now this is done in
ImportInto and LoadModule, but I think it makes more sense to set the
name once, right after the global is created. Calling GetSpec on aURI
seems to return the same spec we'd use in these two call sites. This
change makes it easier to label the shared JSM global nicely in bug
1186409.
MozReview-Commit-ID: 5qKMbzLEiuG
--HG--
extra : rebase_source : c5f104381187cf55a171916364fba527c44b4172
This helper is already being used in the script preloader, and encapsulates
all of the memory mapping and RAII logic used to do the same in the component
loader. Reusing it there allows us to remove a lot of redundant code.
This is applied on top of the patches for bug 989373 in order to avoid
conflicts.
MozReview-Commit-ID: AJ26qV4JLci
--HG--
extra : rebase_source : 88a338ef9a88ff0b775f3f31600f32892b932940
extra : amend_source : 8312eef5078b2782c872ae964c23c2adb54f5ef7
This replaces the JS policy service stubs with a pure C++ version which
directly makes policy decisions based on active WebExtensionPolicy objects.
This is the first step in a larger refactoring, which will remove the
ExtensionManagement module entirely, and replace the current add-on policy
service with direct, non-virtual access to native WebExtensionPolicy objects.
It will also be followed by related changes to migrate the content script and
extension page matching to native code, based on the existing MatchPattern and
WebExtensionPolicy bindings.
MozReview-Commit-ID: 2MpbmXZGiPZ
--HG--
extra : rebase_source : 8b268618164b45605143e858665e592de829a6fa
In most cases no expando object has ever been attached, we don't need to do a
lot of things and realize it in the last minute.
MozReview-Commit-ID: 5u9ivZQj5L8
--HG--
extra : rebase_source : 71405f978a7c832a6694206bf0410debe596967c
Changed the type of argument |targetFilter| of NukeCrossCompartmentWrappers()
from CompartmentFilter to JSCompartment* because it is always a single target
compartment, and we can optimize the iteration not to iterate the outer map.
MozReview-Commit-ID: 7cDCgJI0H9z
--HG--
extra : rebase_source : 4973dfd4c3326bf48b78088979962e425e35030c
While we're here, also align their buckets and give them bug_numbers fields.
To change buckets for GC_MAX_PAUSE_MS we need to rename to _2. Because of
GC_MAX_PAUSE_MS' use as a historical perf metric, we need to leave it in-place
for now.
MozReview-Commit-ID: Cffo3q1pR5E
--HG--
extra : rebase_source : 9843ca718dea8694be8029530a0f8646352c5b37
Changed the type of argument |targetFilter| of NukeCrossCompartmentWrappers()
from CompartmentFilter to JSCompartment* because it is always a single target
compartment, and we can optimize the iteration not to iterate the outer map.
MozReview-Commit-ID: 7cDCgJI0H9z
--HG--
extra : rebase_source : ee9341168a28b5e6f273c512b0562ee4ddc297bc
extra : source : e80197b115673f259293d112da61c8dd9edc121e
The current logic is fairly hard to follow, and fails to account for changes
in the set of processes a script needs to be executed in when deciding whether
to write a new cache file. These changes simplify that logic considerably,
increase the chances that we'll correctly pre-decode a script that's needed in
a given process during startup.
MozReview-Commit-ID: BvqjKU8FDHW
--HG--
extra : rebase_source : 132af63ee8f8df5b5d704580d40735c12ed74ed9
This makes the code a little nicer to read, and means there will be less code churn
if we later add back the ability to share globals.
The holder also gets changed to an actual JS object.
mLoaderGlobal is always null, but the simplification for that will be
made in a later patch.
MozReview-Commit-ID: 7Qg7JSgIxxm
--HG--
extra : rebase_source : 204339b998501c96af35b407ba672a11204956dc
The name obj is not very descriptive, and a later patch will add
another object to this method, so rename it to thisObj. thisObj is the
object we set properties on for a particular .jsm. With global
sharing, it will be different than the global.
MozReview-Commit-ID: 9TPqdbXKYXO
--HG--
extra : rebase_source : c1692bb4f2274f957e602d0e469a544ae9a97e6a
Thanks to the previous patch, we never set any of the function
arguments, so they can be removed, and various code for running
functions can be deleted.
MozReview-Commit-ID: BTIIyDtBPMR
--HG--
extra : rebase_source : 944adf3ac8f1579639e631a478fc286e980972ab
FindTargetObject in DoLoadSubScriptWithOptions will always return a
global object, so the boolean values we pass around to determine if a
global was being reused will always be false. The next patch will
eliminate the various |function| arguments that are now unused.
MozReview-Commit-ID: GvPNFGluRub
--HG--
extra : rebase_source : 76a67f5523153a37942c2730388e62125ecf4390
With the changes in part 1, the local variable |function| is always
null in ObjectForLocation, which lets me remove a lot of dead
code. Additionally, in the second half of the function we know that
|script| is always non-null, because we return with a failure before
then if it isn't null.
In addition, with these changes WriteCachedFunction is no longer
called, so I removed it.
MozReview-Commit-ID: 60hEPi8S3H4
--HG--
extra : rebase_source : 69ea6110fb85d02d2f1c72c5675014aeebb2dee5
Removing support for this preference means that mReuseLoaderGlobal
will always be false, which lets us eliminate that field, and remove a
lot of code.
This also means that false is always passed to
PrepareObjectForLocation for aReuseLoaderGlobal.
ReadCachedFunction is no longer used, so it is deleted.
MozReview-Commit-ID: 5JD24EYVcQf
--HG--
extra : rebase_source : 3b23b4b8d2b1a2f6a53223477afb4cb13b8a671c
Currently, the final slice of an incremental GC only gets a GC_CYCLE_END callback, not a GC_SLICE_END callback. So if you are doing anything that expects to see all of the slices, you will be missing one.
Simplify the setup so that every GC is bracketed with CYCLE_BEGIN/END, and every slice is bracketed with SLICE_BEGIN/END, treating a nonincremental as a GC with a single slice (which it is for everything else.)
--HG--
extra : rebase_source : 8e21300819d517b3e35de14930f53b3ab737a44e
Right now, it is a macro, which causes a warning with clang about
extraneous parentheses. Turning it into a function fixes that and is
also nicer.
MozReview-Commit-ID: KTPA9b6oeUu
--HG--
extra : rebase_source : ae063db5a4b5b14bc4a3a8f64adbbecfc897edd9
Flushing the cache at startup is already handled automatically by the
AppStartup code, which removes the entire startupCache directory when
necessary. The add-on manager requires being able to flush the cache at
runtime, though, for the sake of updating bootstrapped add-ons.
MozReview-Commit-ID: LIdiNHrXYXu
--HG--
extra : source : 8f4637881ddc42a948c894e62c8486fe8677a938
extra : histedit_source : e69395a2b87b2b0edb394686ed6ee24731ba9fb8
One of the things that I've noticed in profiling startup overhead is that,
even with the startup cache, we spend about 130ms just loading and decoding
scripts from the startup cache on my machine.
I think we should be able to do better than that by doing some of that work in
the background for scripts that we know we'll need during startup. With this
change, we seem to consistently save about 3-5% on non-e10s startup overhead
on talos. But there's a lot of room for tuning, and I think we get some
considerable improvement with a few ongoing tweeks.
Some notes about the approach:
- Setting up the off-thread compile is fairly expensive, since we need to
create a global object, and a lot of its built-in prototype objects for each
compile. So in order for there to be a performance improvement for OMT
compiles, the script has to be pretty large. Right now, the tipping point
seems to be about 20K.
There's currently no easy way to improve the per-compile setup overhead, but
we should be able to combine the off-thread compiles for multiple smaller
scripts into a single operation without any additional per-script overhead.
- The time we spend setting up scripts for OMT compile is almost entirely
CPU-bound. That means that we have a chunk of about 20-50ms where we can
safely schedule thread-safe IO work during early startup, so if we schedule
some of our current synchronous IO operations on background threads during the
script cache setup, we basically get them for free, and can probably increase
the number of scripts we compile in the background.
- I went with an uncompressed mmap of the raw XDR data for a storage format.
That currently occupies about 5MB of disk space. Gzipped, it's ~1.2MB, so
compressing it might save some startup disk IO, but keeping it uncompressed
simplifies a lot of the OMT and even main thread decoding process, but, more
importantly:
- We currently don't use the startup cache in content processes, for a variety
of reasons. However, with this approach, I think we can safely store the
cached script data from a content process before we load any untrusted code
into it, and then share mmapped startup cache data between all content
processes. That should speed up content process startup *a lot*, and very
likely save memory, too. And:
- If we're especially concerned about saving per-process memory, and we keep
the cache data mapped for the lifetime of the JS runtime, I think that with
some effort we can probably share the static string data from scripts between
content processes, without any copying. Right now, it looks like for the main
process, there's about 1.5MB of string-ish data in the XDR dumps. It's
probably less for content processes, but if we could save .5MB per process
this way, it might make it easier to increase the number of content processes
we allow.
MozReview-Commit-ID: CVJahyNktKB
--HG--
extra : source : 1c7df945505930d2d86a076ee20807104324c8cc
extra : histedit_source : 75e193839edf727874f01b2a9f6852f6c1f087fb%2C3ce966d7dcf2bd0454a7d673d0467097456bd782
Flushing the cache at startup is already handled automatically by the
AppStartup code, which removes the entire startupCache directory when
necessary. The add-on manager requires being able to flush the cache at
runtime, though, for the sake of updating bootstrapped add-ons.
MozReview-Commit-ID: LIdiNHrXYXu
--HG--
extra : rebase_source : e5b16490f47e20c78d081ad03dec02c6b2874fc3
extra : absorb_source : 6cd94504c8247f375161b2afdca5c61d59cf8f01
One of the things that I've noticed in profiling startup overhead is that,
even with the startup cache, we spend about 130ms just loading and decoding
scripts from the startup cache on my machine.
I think we should be able to do better than that by doing some of that work in
the background for scripts that we know we'll need during startup. With this
change, we seem to consistently save about 3-5% on non-e10s startup overhead
on talos. But there's a lot of room for tuning, and I think we get some
considerable improvement with a few ongoing tweeks.
Some notes about the approach:
- Setting up the off-thread compile is fairly expensive, since we need to
create a global object, and a lot of its built-in prototype objects for each
compile. So in order for there to be a performance improvement for OMT
compiles, the script has to be pretty large. Right now, the tipping point
seems to be about 20K.
There's currently no easy way to improve the per-compile setup overhead, but
we should be able to combine the off-thread compiles for multiple smaller
scripts into a single operation without any additional per-script overhead.
- The time we spend setting up scripts for OMT compile is almost entirely
CPU-bound. That means that we have a chunk of about 20-50ms where we can
safely schedule thread-safe IO work during early startup, so if we schedule
some of our current synchronous IO operations on background threads during the
script cache setup, we basically get them for free, and can probably increase
the number of scripts we compile in the background.
- I went with an uncompressed mmap of the raw XDR data for a storage format.
That currently occupies about 5MB of disk space. Gzipped, it's ~1.2MB, so
compressing it might save some startup disk IO, but keeping it uncompressed
simplifies a lot of the OMT and even main thread decoding process, but, more
importantly:
- We currently don't use the startup cache in content processes, for a variety
of reasons. However, with this approach, I think we can safely store the
cached script data from a content process before we load any untrusted code
into it, and then share mmapped startup cache data between all content
processes. That should speed up content process startup *a lot*, and very
likely save memory, too. And:
- If we're especially concerned about saving per-process memory, and we keep
the cache data mapped for the lifetime of the JS runtime, I think that with
some effort we can probably share the static string data from scripts between
content processes, without any copying. Right now, it looks like for the main
process, there's about 1.5MB of string-ish data in the XDR dumps. It's
probably less for content processes, but if we could save .5MB per process
this way, it might make it easier to increase the number of content processes
we allow.
MozReview-Commit-ID: CVJahyNktKB
--HG--
extra : rebase_source : 2ec24c8b0000f9187a9bf4a096ee8d93403d7ab2
extra : absorb_source : bb9d799d664a03941447a294ac43c54f334ef6f5
The patch makes the following proxy changes:
* The number of slots in ProxyValueArray is now dynamic and depends on the number of reserved slots we get from the Class.
* "Extra slots" was renamed to "Reserved slots" to make this clearer.
* All proxy Classes now have 2 reserved slots, but it should be easy to change that for proxy Classes that need more than 2 slots.
* Proxies now store a pointer to these slots and this means GetReservedSlot and SetReservedSlot can be used on proxies as well. We no longer need GetReservedOrProxyPrivateSlot and SetReservedOrProxyPrivateSlot.
And some changes to make DOM Proxies work with this:
* We now store the C++ object in the first reserved slot (DOM_OBJECT_SLOT) instead of in the proxy's private slot. This is pretty nice because it matches what we do for non-proxy DOM objects.
* We now store the expando in the proxy's private slot so I removed GetDOMProxyExpandoSlot and changed the IC code to get the expando from the private slot instead.
When we just had CycleCollectedJSContext (and no CycleCollectedJSRuntime) a
weird thing happened at shutdown:
1. We would call JS_DestroyContext from ~CycleCollectedJSContext. By that time,
the ~XPCJSContext destructor had already finished.
2. Destroying the context runs a final GC. That GC would call back into various
GC callbacks, such as TraceBlackJS and TraceGrayJS.
3. These callbacks would do a virtual method call:
http://searchfox.org/mozilla-central/rev/876c7dd30586f9c6f9c99ef7444f2d73c7acfe7c/xpcom/base/CycleCollectedJSRuntime.cpp#791
4. Normally this method call would call into
XPCContext::TraceNativeBlackRoots. However, C++ changes the vtable for an
object during destruction. So we would only call CycleCollectedJSContext's
version of TraceNativeBlackRoots, which is empty. So we never traced anything.
When I moved this code into the runtime, we actually do call into
XPCJSRuntime::TraceNativeBlackRoots at that time. So the behavior changed, and
that was causing crashes once I nulled out the TLS as you asked. So I removed
these callbacks for the last GC.
MozReview-Commit-ID: 3do13bjpwQj
This patch keeps a list of all the cooperatively scheduled contexts that are
linked to a runtime. In places where we need to iterate over all contexts (for
GC, specifically), it iterates over the list.
MozReview-Commit-ID: 3pKJX78f2l0
This field assumes there is one XPCJSContext globally (i.e., per nsXPConnect
instance). This patch eliminates the field by using different paths to
reach the context.
MozReview-Commit-ID: FjR6cTZ5QfZ
XPCJSContext::Get() now does a TLS lookup, which is a little more expensive
than looking up a global variable. This patch removes as many of the TLS
lookups as possible.
MozReview-Commit-ID: GsqzJn55Lya
Once we have multiple XPCJSContext's, we may have to figure out which one we're
using with TLS. A later patch tries to remove as many of these TLS lookups
as possible so that performance doesn't suffer.
MozReview-Commit-ID: 50uHpDLZmUH
Change FormatStackDump to return UniqueChars and fix up the users. This
removes a bit more manual memory management.
MozReview-Commit-ID: 60GBgeS4rzg
--HG--
extra : rebase_source : 15060321f567816ca434cdf1ef816d8322ceefff
TimeStamp::ProcessCreations()'s aIsInconsistent outparam is ignored by the
majority of its caller. This patch makes it optional. Notably, this makes
ProcessCreation() easier to use in a constructor's initializer list.
Other browsers do not support any of these (IIRC), telemetry reports
essentially zero usage, and supporting them is contrary to the DOM spec.
Notes on specific events:
CommandEvent and SimpleGestureEvent: These are not supposed to be
web-exposed APIs, so I hid the interfaces from web content too
(necessary to avoid test_all_synthetic_events.html failures).
DataContainerEvent: This was a non-standard substitute for CustomEvent
that seemed to have only one user, so I removed it entirely and switched
the user (MozillaFileLogger.js) to CustomEvent.
ScrollAreaEvent: This is entirely non-standard, but we apparently expose
it deliberately to web content, so I didn't see any reason to remove it
from createEvent.
SimpleGestureEvent and XULCommandEvent: Can still be created from
createEvent(), but not by content.
TimeEvent: This is still in because it has no constructor, so there's no
other way to create it. Ideally we'd update the SMIL spec to add a
constructor. I did remove TimeEvents.
MozReview-Commit-ID: 7Yi2oCl9SM2
--HG--
extra : rebase_source : 199ab921acfc531b8b85e77f90fcd799b03c887b
This changes JS_smprintf to return UniqueChars, rather than relying on
manual memory management.
MozReview-Commit-ID: ENjQJODYdD1
--HG--
extra : rebase_source : 4c8ad4719dce205a7ef25e41eca25c5af793bb47
With changes introduced in bug 1356066 I made the xpc_LocalizeContext be
called on each app locale change to update the default locale in each context.
Unfortunately, this function is also assigning the locale callbacks and
with my change it started doing it on each language change.
In this patch I'm first checking if we do have XPCLocaleCallbacks for the
given context and only if we don't, I assign them.
MozReview-Commit-ID: 7AiCsJfKBID
--HG--
extra : rebase_source : 1efe65895759ffc07e0047d063a405d757cb1092
NS_SetCurrentThreadName() is added as an alternative to PR_SetCurrentThreadName()
inside libxul. The thread names are collected in the form of crash annotation to
be processed on socorro.
MozReview-Commit-ID: 4RpAWzTuvPs
clang's -Wcomma warning warns about suspicious use of the comma operator such as between two statements or to call a function for side effects within an expression.
js/src/builtin/MapObject.cpp:786:48 [-Wcomma] possible misuse of comma operator here
js/src/builtin/MapObject.cpp:1371:48 [-Wcomma] possible misuse of comma operator here
js/src/builtin/RegExp.cpp:1266:62 [-Wcomma] possible misuse of comma operator here
js/src/jit/x64/BaseAssembler-x64.h:624:99 [-Wcomma] possible misuse of comma operator here
js/src/jsarray.cpp:2416:27 [-Wcomma] possible misuse of comma operator here
js/src/jscompartment.cpp:120:48 [-Wcomma] possible misuse of comma operator here
js/src/jsstr.cpp:3346:14 [-Wcomma] possible misuse of comma operator here
js/xpconnect/src/XPCWrappedNativeJSOps.cpp:316:71 [-Wcomma] possible misuse of comma operator here
MozReview-Commit-ID: BbT4otUXczV
--HG--
extra : rebase_source : b232d10b5280c567f8fe390fcb56012b78da580a
This is necessary to allow helper threads to attempt large allocations and recover from fragmentation situations with the LargeAllocationFailureCallback.
MozReview-Commit-ID: AyA3pbXcaYy
--HG--
extra : rebase_source : 7a5feb779b690ec7f123481e76f2390c850dac91
mSystemPrincipal is an nsCOMPtr so it does not need to be explicitly
initialized.
Fields don't have to be lined up.
Empty function bodies don't need to be commented as such.
The blank line at the start of mozJSComponentLoader.cpp prevents Emacs
from using the mode line.
MozReview-Commit-ID: 7Az1x8jmxTI
--HG--
extra : rebase_source : 2d818074d82f9a6b1041983efd7a81bde9870619
Also, be consistent with the rest of the code and use a handle
typedef in one place.
MozReview-Commit-ID: KY3cnLemoUl
--HG--
extra : rebase_source : 4c3ae2750c868b5401a686dd164adbd04b45a0b5
To run JS in separate cooperative threads, we need to split up per-thread state
from per-runtime state. This patch does that for XPConnect.
MozReview-Commit-ID: 407SlJ7nR6v
Most of the time, the return value of this method should be checked,
because behavior should depend on whether or not an exception is
thrown. However, if it is called immediately after a throw it doesn't
need to be checked because it will always return true. bz said there
is no public API that lets you assume there is an exception because it
would be "too easy to misuse".
MozReview-Commit-ID: CqyicBbcNjW
--HG--
extra : rebase_source : a5b74ba88a927a90d491ceb8f0b750a67f62b0f4
This was only ever used for BeOS and OS2, which have likely long ago
stopped working for other reasons.
MozReview-Commit-ID: AT1jNEB1ydY
--HG--
extra : rebase_source : 8ab13e574c57f0ea96158af86e01ea8f22f6bff7
This is a pretty common use case of preferences.
MozReview-Commit-ID: 7tkdylPZxpY
--HG--
extra : transplant_source : %86%21%C1oXw%07%BB%C6.%CE%C5S%B6%E0%26%8Be%9A%E1
extra : histedit_source : 072f778d7959fa8c0f5838077116b7b9d87c5157
These files were being excluding because we thought they used plarena.h, but it
turns out they did not. A few tweaks needed to be made to clarify whether we
wanted to use mozilla::UniquePtr or js::UniquePtr.
MozReview-Commit-ID: 1su5dO3rR0T
These files were being excluding because we thought they used plarena.h, but it
turns out they did not. A few tweaks needed to be made to clarify whether we
wanted to use mozilla::UniquePtr or js::UniquePtr.
MozReview-Commit-ID: 1su5dO3rR0T
These files were being excluding because we thought they used plarena.h, but it
turns out they did not. A few tweaks needed to be made to clarify whether we
wanted to use mozilla::UniquePtr or js::UniquePtr.
MozReview-Commit-ID: 1su5dO3rR0T
By bug 1346674, we don't use NSILOCALE_* for unicode conversion in XPC/JS. So we should use NS_CopyNativeToUnicode to get a rid of nsIPlatformCharset.
MozReview-Commit-ID: Kp2jijN8On9
Sicne some tests doesn't work with --with-intl-api=no, we should skip it on Android
MozReview-Commit-ID: IjlH3aQdiqb
--HG--
extra : rebase_source : ac6d91bf291f6268ea29bcb29180b2f5197e012c
Now that we join on the thread exiting, we no longer need to have the thread
explicitly tell us it's shutting down.
MozReview-Commit-ID: LycPjUvyeX
--HG--
extra : rebase_source : 7b3d21c3d8de73a1ed511c7d6efefe2a73b2e02a
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
In many cases, to speed up start, compiling a ScriptSource will not
compile the functions themselves, but will rather syntax-parse them
(to check for syntax errors), leaving full compilation for
later. However, if we find ourselves in a case in which the function
is needed almost immediately, we need to full-parse the function
immediately after the syntax-parse, which is wasteful.
This changeset intends to measure how often this happens, by exporting
through Telemetry the duration between the end of the syntax-parse and
the start of the full-parse for each function.
As a memory optimization, instead of storing a timestamp for the
syntax-parse of each function, we store a single timestamp for an
entire ScriptSource. This assumes that all functions of the
ScriptSource are syntax-parsed at approximately the same instant,
which should be mostly true for everything except perhaps `eval` and
`new Function`. Then, when time comes to delazify a function, we
simply determine the time elapsed since the ScriptSource was compiled.
Histogram JS_PARSER_COMPILE_LAZY_AFTER_MS starts at 10ms (anything
smaller is often not measurable) and stops at 10s (anything larger can
safely be said to be not wasteful).
MozReview-Commit-ID: 6Ycy2OIIiAt
--HG--
extra : rebase_source : 0ccd6f51189b3ad8056e9f39e267235d68f6e2db
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
The profiler can currently handle nested calls to profiler_{init,shutdown}() --
only the first call to profiler_init() and the last call to profiler_shutdown()
do anything. And sure enough, we have the following.
- Outer init/shutdown pairs in XRE_main()/XRE_InitChildProcess() (via
GeckoProfilerInitRAII).
- Inner init/shutdown pairs in NS_InitXPCOM2()/NS_InitMinimalXPCOM() (both shut
down in ShutdownXPCOM()).
This is a bit silly, so the patch removes the inner pairs, and adds a
now-needed pair in XRE_XPCShellMain. This will allow gInitCount -- which tracks
the nesting depth -- to be removed in a future patch.
--HG--
extra : rebase_source : 7e8dc6ce81ce10269d2db6a7bf32852c396dba0e
