Specifically, it's important not to try to use Move() in the
Alloc+SendConstructor convenience method, because that Move()s the same
value twice (as discovered in bug 1186706), and neither callee
requires rvalue references in that case anyway.
This also removes the previous feature of calling makeCxxArgs with
params=0 to omit the message's input parameters, because it's not being
used and doesn't appear to have ever been used; it could be restored
(e.g., as paramsems=None) if needed.
It's an annotation that is used a lot, and should be used even more, so a
shorter name is better.
MozReview-Commit-ID: 1VS4Dney4WX
--HG--
extra : rebase_source : b26919c1b0fcb32e5339adeef5be5becae6032cf
We do this for the same reasons outlined in part 1: calls to
NS_RUNTIMEABORT are rather large and we generate a lot of them (~1000
left after part 1). This patch reduces .text size by ~20K on x86-64
Linux.
We don't do anything with it in terms of error reporting, we pass in 0
in the child process, and if you're in a debugger, presumably you can
figure out the other process's PID yourself.
NS_RUNTIMEABORT generates rather a lot of code, since we have to load up
five arguments, two of which are strings, and then call NS_DebugBreak.
Instead of doing this, let's just call each protocol's FatalError, which
only requires loading one string argument. Each protocol's FatalError
calls mozilla::ipc::FatalError, which communicates exactly the same
information as the inlined NS_RUNTIMEABORT would (e.g. crash reporter
annotations), but at a significant code savings: this patch reduces
.text by ~80K on Linux x86-64.
In bug 1259428, we changes a bunch of things that were previously
classes to refer to functions instead. Jed suggested in bug 1259428
comment 10 that we might want to rename things to reflect the new world
order as a followup. Consider it done.
All we use our Message subclasses for nowadays is the constructor, so we
might as well strip the class away and just have functions that perform
the construction for us. This change eliminates unnecessary vtables as
well as making the included headers somewhat smaller, which is always
nice.
Various bits of IPDL code would do something like:
Message* m = ...;
if (m.type() == particular message type) {
static_cast<ParticularMessageType*>(m)->name();
}
The static_cast is a remnant of having to do the downcast to access the
Log() method on the concrete subclass. Since name() is defined on
Message, there's no need for these casts anymore, so let's remove them.
The first step to eliminating all the generated Message subclasses the
IPDL compiler spits out is to move the functionality of their Log
methods someplace else. In addition to eliminating the need for the Log
methods, this change has the welcome effect of moving a bunch of code
that would be generated hundreds of times into a single place, which
should reduce code size a bit (debug builds only). We don't actually
remove the generation of the Log methods; that change will be done for a
future patch.
IPDL processing takes ~9.4s on my i7-6700K and is the long pole in the
"export" tier for clobber --disable-compile-environment builds. IPDL
shouldn't be needed for these builds.
Disabling IPDL makes artifact builds ~4s faster on my machine.
--HG--
extra : rebase_source : 60aeec636e18380c3258f054e90d1b6c3a16fadf
The bulk of this commit was generated with a script, executed at the top
level of a typical source code checkout. The only non-machine-generated
part was modifying MFBT's moz.build to reflect the new naming.
CLOSED TREE makes big refactorings like this a piece of cake.
# The main substitution.
find . -name '*.cpp' -o -name '*.cc' -o -name '*.h' -o -name '*.mm' -o -name '*.idl'| \
xargs perl -p -i -e '
s/nsRefPtr\.h/RefPtr\.h/g; # handle includes
s/nsRefPtr ?</RefPtr</g; # handle declarations and variables
'
# Handle a special friend declaration in gfx/layers/AtomicRefCountedWithFinalize.h.
perl -p -i -e 's/::nsRefPtr;/::RefPtr;/' gfx/layers/AtomicRefCountedWithFinalize.h
# Handle nsRefPtr.h itself, a couple places that define constructors
# from nsRefPtr, and code generators specially. We do this here, rather
# than indiscriminantly s/nsRefPtr/RefPtr/, because that would rename
# things like nsRefPtrHashtable.
perl -p -i -e 's/nsRefPtr/RefPtr/g' \
mfbt/nsRefPtr.h \
xpcom/glue/nsCOMPtr.h \
xpcom/base/OwningNonNull.h \
ipc/ipdl/ipdl/lower.py \
ipc/ipdl/ipdl/builtin.py \
dom/bindings/Codegen.py \
python/lldbutils/lldbutils/utils.py
# In our indiscriminate substitution above, we renamed
# nsRefPtrGetterAddRefs, the class behind getter_AddRefs. Fix that up.
find . -name '*.cpp' -o -name '*.h' -o -name '*.idl' | \
xargs perl -p -i -e 's/nsRefPtrGetterAddRefs/RefPtrGetterAddRefs/g'
if [ -d .git ]; then
git mv mfbt/nsRefPtr.h mfbt/RefPtr.h
else
hg mv mfbt/nsRefPtr.h mfbt/RefPtr.h
fi
--HG--
rename : mfbt/nsRefPtr.h => mfbt/RefPtr.h
Similar to the last patch, we copy any sub-protocols a protocol owns
before destroying the sub-protocols. We do this to ensure a stable
iteration over the sub-protocols, as destroying a sub-protocol may
trigger other sub-protocol deletions. Let's permit an existing
interface method to do the copying for us, so if the details of how we
store sub-protocols change, this call site is insulated from the
details.
In $PROTOCOL::CloneManages, we reach directly into the other protocol's
sub-protocol arrays to copy them. It would be better, from a
fewer-places-to-modify-when-things-change point of view if we used the
$PROTOCOL::Managed$SUBPROTOCOL array getter that already exists for this
purpose. A good compiler should be able to remove the function call
overhead...but cloning managees is probably expensive anyway, so a
function call here doesn't matter much.
It's not immediately obvious to me why we clone and then iterate over
the clone, rather than iterating directly, but perhaps there are subtle
IPDL dragons lurking hereabouts.
The functions:
- _callCxxArrayInsertSorted
- _callCxxArrayRemoveSorted
- _callCxxArrayClear
- _cxxArrayHasElementSorted
are only ever used to touch the managed sub-protocol arrays of a
protocol. It would be better if they reflected the *intent* of what
they were doing, rather than what C++ function they were calling, since
we're about to change that.
The patch removes 455 occurrences of FAIL_ON_WARNINGS from moz.build files, and
adds 78 instances of ALLOW_COMPILER_WARNINGS. About half of those 78 are in
code we control and which should be removable with a little effort.
--HG--
extra : rebase_source : 82e3387abfbd5f1471e953961d301d3d97ed2973
Jed Davis
Kyle Huey
Andrew McCreight
Nicholas Nethercote
Andrea Marchesini
Nathan Froyd
Aaron Klotz
Bill McCloskey
Lee Salzman
Nicolas Silva
Gregory Szorc
Randell Jesup
Birunthan Mohanathas
Nathan Froyd
George Wright
Chris Peterson
Bobby Holley
David Anderson
Jeff Muizelaar
Jim Mathies