"alloc-failure" is completely unused apart from the description text in nsI-
Memory.idl (and has been since before Firefox 17), while "lowering-priority" is
still being checked for in the PuppetWidget, but otherwise unused as well since
the feature using it was decommissioned in bug 1234176.
Since we're touching the PuppetWidget code anyway, we take the opportunity to
add a check for "low-memory-ongoing" instead, since similar as to how things
used to be with "lowering-priority", we want to drop the LayerManager's cached
resources only when receiving a real full memory-pressure event, but not for
subsequent ongoing notifications.
MozReview-Commit-ID: HL03SOU8axe
--HG--
extra : rebase_source : c988769df36d8d77f4770c71d5c5e0d75c3b99af
For some reason, the CC spends a lot of time tracing jsids on
ObjectGroups when an addon is installed. This patch avoids that by
adding a canSkipJsids flag to JSTracer, and using it in
ObjectGroup::traceChildren. If this is true, then the tracer is free
to not report every jsid. This flag is set to true for the two CC
tracers.
MozReview-Commit-ID: CWFqQEr0SxV
--HG--
extra : rebase_source : cc31c22717f8990166454db191e0d40c145e09f0
These were found using some ugly text searches, so it's possible some unused
atoms remain. In the future, we should enforce removing unused atoms using
static analysis. Or just generate the static atoms table based on string atom
names in our code.
This patch leaves unused RDF atoms in place, since those are being dealt with
in another bug.
MozReview-Commit-ID: 1KpH9KsHzQy
--HG--
extra : rebase_source : 8138faa2b16e847da31861abae2bbc1c7bac4e02
The JS engine has changed the APIs that cooperative scheduling relies
on into immediate crashes. Some users seem to set the prefs, and then
we get a lot of crashes on Nightly. This removes the top-level pref to
save them some grief.
I continue to pass the pref as false to the child process to avoid
weirdness if we somehow we get this far when the parent and child have
different versions.
MozReview-Commit-ID: 3o3yV2efx2r
--HG--
extra : rebase_source : 398c4d77ce3f78f3814ac97882b4a5e3190c44f7
For Fennec on Android, if we haven't received memory pressure notifications from
the OS for a certain amount of time (in the order of ~15 mins), we assume that
we're no longer under memory pressure. In order to turn the bfcache back on when
that happens, we now want to be able to forward this fact to Gecko as well.
Unfortunately, the way memory pressure is tracked using an atomic variable
doesn't easily allow to fully extend the existing priority rules between "new"
and "ongoing" to include a new "stopping of memory pressure" event. Since we're
not using Dispatch*Eventual*MemoryPressure on Android and therefore the queuing
priority behaviour isn't actually relevant for us, we just ignore that and only
enforce that a pending "new" memory pressure event takes priority over a "stop"
event.
MozReview-Commit-ID: 90C9KogUyvf
--HG--
extra : rebase_source : 4e71a31433557d8d486f941953717a88d5d87e7d
Move tracking of persistent window state into nsXULWindow. Also, move
special handling of the width/height of the window into nsXULWindow.
MozReview-Commit-ID: LOmHGyYeNSU
--HG--
extra : rebase_source : bcea16eb6209ff789948644a64968a7325cea4ef
Also fixes existing code which fails the rule.
MozReview-Commit-ID: CkLFgsspGMU
--HG--
extra : rebase_source : 86a43837659aa2ad83a87eab53b7aa8d39ccf55b
Use fatal MOZ_ASSERT or non-fatal NS_ASSERTION instead.
MozReview-Commit-ID: 1QAsgoWpXDn
--HG--
extra : source : 9ca972b6b3e7d3b576e20a0bf412df51d82aad9f
extra : intermediate-source : a909a9d7bc9a53095e963a4bea45f4fc4aa85b72
This also removes any redundant Ci.nsISupports elements in the interface
lists.
This was done using the following script:
acecb401b7/processors/chromeutils-generateQI.jsm
MozReview-Commit-ID: AIx10P8GpZY
--HG--
extra : rebase_source : a29c07530586dc18ba040f19215475ac20fcfb3b
PerformanceCounters are currently disabled in two ways:
- a preference that's off by default "dom.performance.enable_scheduler_timing"
- calls made only for nightly using #ifndef RELEASE_OR_BETA
In order to simplify the code, let's remove the #ifndef and rely only on the pref.
That will also allows us to use the feature in every version going forward.
The performance will not be impacted since the current code is already using
the (cached) pref value to determine if the counters are used.
MozReview-Commit-ID: 47t2M1O13aH
--HG--
extra : rebase_source : e129e1829f1dc37c019e50e156474c4876d6d6cb
For reasons unknown, if you give MSVC:
// Foo.h
struct Foo
{
...
};
extern const Foo gFoo;
// Foo.cpp, which necessarily includes Foo.h.
extern constexpr Foo gFoo = {
};
MSVC will create a static initializer for gFoo and place it in the
read/write data section, rather than the read-only data section.
Removing the `extern const` declaration seems to be enough to make this
problem go away. We need to adjust the declaration of other variables
to compensate for the non-visibility of gFoo in the header file.
Going through XPConnect for JS-to-JS access in the blocklist service adds no
benefit, but does add a lot of overhead and maintenance burden.
MozReview-Commit-ID: Lf1mDK0b0B0
--HG--
extra : rebase_source : 410ed3fcf999d7c7775ef4926c89f67d9e342da8
Otherwise, one can do thinkos like:
MakeScopeExit(...);
and the scope exiting function will execute much earlier than the
intended:
auto guard = MakeScopeExit(...);
This patch goes through the XPConnect conversion methods, and adds cases for
T_DOMOBJECT which call the Wrap, Unwrap, and Cleanup methods from the
nsXPTDOMObjectInfo objects created in the last part.
For consistency with normal interface pointers, and because it wasn't too
complex, I also added support for including T_DOMOBJECTs in XPCOM arrays.
Unlike the other lists in xptinfo, this list contains relocations. Each
DOMObject has 3 functions generated for it, `Wrap`, `Unwrap` and `Cleanup`,
which perform the necessary actions. These are stored as function pointers.
Wrap gets the DOMObject wrapper using the DOM binding code, Unwrap gets the
underlying C++ object, and addrefs it (as XPCOM methods return native types
via getter_AddRefs), and Cleanup releases a reference to the underlying
C++ object, for when the unwrapped object is used as a temporary during a call.
To generate the code, we need to have the declaration of the native C++ type
in scope, so we also emit #include-s for the headerFiles.
They are parsed into a WebIDL object, and lowered into C++, Rust, and XPT.
For C++ code, we generate a correctly namespaced forward declaration. In Rust,
the types are exposed as `*const c_void`, as we don't have WebIDL type
information there.
The XPT code generator needs to know the header filename in order to perform
correct codegen, so we also get that information.
Due to the decision to keep the old API on nsXPTInterfaceInfo in part 4, this is
a fairly straightforward patch.
1. I had to change a couple of consumers of `IsRetval()` due to the movement of
that flag.
2. I changed all code which held a nsIInterfaceInfo to hold an `const
nsXPTInterfaceInfo*` instead.
3. I changed code which used the nsIInterfaceInfoManager to instead call the
static methods on nsXPTInterfaceInfo.
This patch contains the meat of the changes here. The following summarize the changes:
1. xptinfo.h is rewritten to expose the new interface for reading the XPT data,
The nsXPTInterfaceInfo object exposes methods with the same signatures as
the methods on nsIInterfaceInfo, to make converting code which used
nsIInterfaceInfo as easy as possible, even when those methods don't have
signatures which make a ton of sense anymore. There are also a few methods
which are unnecessary (they return `true` or similar), which should be
removed over time.
Members of the data structures are made private in order to prevent reading
them directly. Code should instead call the getter methods. This should make
it easier to change their memory representation in the future. Constructing
these structs is made possible by making the structs `friend class` with the
XPTConstruct class, which is implemented by the code generator, and is able
to access the private fields.
In addition, rather than using integers with flag constants, I opted for
using C++ bitfields to store individual flags, as I found it made it easier
to both write the code generator, and reason about the layouts of the types.
I was able to shave a byte off of each nsXPTParamInfo (4 bytes -> 3 bytes)
by shoving the flags into spare bits in the nsXPTType. Unfortunately there
was not enough room for the retval flag. Fortunately, we already depend in
our code on the retval parameter being the last parameter, so I worked
around this by removing the retval flag and instead having a `hasretval`
flag on the method itself.
2. An xptinfo.cpp file is added for out-of-line definitions of more complex
methods, and the internal implementation details of the perfect hash.
Notable is the handling of xptshim interfaces. As the type is uniform, a
flag is checked when trying to read constant information, and a different
table with pointers into webidl data structures is checked when the type is
determined to be a shim.
Ideally we could remove this once we remove the remaining consumers of the
existing shim interfaces.
3. A python code generator which takes in the json XPT files generated in the
previous part, and emits a xptdata.cpp file with the data structures. I did
my best to heavily comment the code.
This code uses the friend class trick to construct the private fields of the
structs, and avoid a dependency on the ordering of fields in xptinfo.h.
The sInterfaces array's order is determined by a generated perfect hash
which is also written into the binary. This should allow for fast lookups by
IID or name of interfaces in memory. The hash function used for the perfect
hash is a simple FNV hash, as they're pretty fast.
For perfect hashing of names, another table is created which contains
indexes into the sInterfaces table. Lookup by name is less common, and this
form of lookup should still be very fast.
4. The necessary Makefiles are updated to use the new code generator, and
generate the file correctly.
This patch adds a python script based on the old typelib.py script which takes
in a parsed XPIDL file, and generates a json-based XPT file to use as a build
intermediate. I did my best to keep the generated format simple.
In the previous patch, one of the files which was deleted is ShimInterfaceInfo.
This is an implementor of nsIInterfaceInfo which exists for legacy reasons, in
order to allow Components.interfaces.nsIDOM* to have the correct constants and
IIDs associated with them.
As that file was deleted, this information now has to be stored in the typelib.
To do this, the information is moved to the xptshim and xptshimfile attributes
on the relevant xpcom interfaces.
xptshim(...) means that this xpcom interface is a shim for the WebIDL interface
with the specified name.
xptshimfile(...) is for use when the webidl interface is declared in another
interface's .webidl file, (in our case, MessageManager.webidl). It contains the
name of the parent binding, such that we can #include the correct file in our
generated code.
This patch does not add the code which uses these changes, only the parsing
logic.
Unfortunately, I wasn't able to figure out a way to make firefox build & run in
the intermediate stages of these commits. Because of this, I am going to just
delete most of the code which I am deleting in the first patch, as I figure that
those are somewhat uninteresting changes, and then make the other changes in the
following patches.
In total, the following things are deleted:
1. All of xpcom/typelib, except for `xpt/tools` - this directory is being
subsumed entirely into xpcom/reflect/xptinfo.
2. Most of the code in xpcom/reflect/xptinfo, it is being rewritten to avoid
allocating and contain all of the necessary data structures.
3. idl-parser's typelib.py XPT generator, as it will be replaced.
4. Most includes of files which have been deleted.
NOTE: xpcom/typelib/xpt/tools/xpt.py was not removed, as it is used by bundling
code & bundling tests, which we don't want to remove yet.
Markus Stange
Jan Henning
Andrew McCreight
Csoregi Natalia
Kris Maglione
Brendan Dahl
Chris Peterson
Stephen A Pohl
Emilio Cobos Álvarez
arthur.iakab
Dorel Luca
sotaro
Boris Zbarsky
Jeff Walden
Michael Kaply
Brindusan Cristian
Tarek Ziadé
Gijs Kruitbosch
Nathan Froyd
Gabriele Svelto
Aaron Klotz
Jorg K
Nika Layzell
Peter Van der Beken
Matt Woodrow