Before bug 938437, we had a rather large and error-prone
nsStaticXULComponents.cpp used to register all modules. That was
replaced with clever use of the linker, which allowed to avoid the mess
that maintaining that file was.
Fast forward to now, where after bug 1524687 and other work that
preceded it, we have a much smaller number of remaining static xpcom
components, registered via this linker hack, and don't expect to add
any new ones. The list should eventually go down to zero.
Within that context, it seems to be the right time to get rid of the
magic, and with it the problems it causes on its own.
Some of those components could probably be trivially be converted to
static registration via .conf files, but I didn't want to deal with the
possible need to increase the number of dummy modules in XPCOMInit.cpp.
They can still be converted as a followup.
Differential Revision: https://phabricator.services.mozilla.com/D26076
--HG--
extra : moz-landing-system : lando
This patch essentially creates a separate, static component database for
statically-defined CID and contract ID entries, and gives it precedence over
the runtime DB. It combines the two separate databases by updating existing
code to use lookup functions which understand both databases, and then access
all entries through wrappers which defer to the appropriate underlying type.
Static component entries require no runtime relocations, and require no
writable data allocation aside from one pointer-sized BSS entry per CID, and
one bit of BSS per contract ID.
To achieve this, all strings in the static lookup tables are stored as indexes
into a static string table, all constructor functions live in a switch
statement which compiles to a relative jump table, and all writable data for
static entries is accessed by indexed lookups into BSS arrays.
We also avoid creating nsIFactory entries for static components when possible
by adding a CreateInstance method to nsFactoryEntry and the corresponding
entry wrapper to directly call the appropriate constructor method, and only
create a factory object when required by external code.
Differential Revision: https://phabricator.services.mozilla.com/D15035
--HG--
extra : rebase_source : 903a6f31c6290d0090e6765e0e317d1f749c5855
extra : source : b8d2dfdfc324c53ce5aacc822ce52d4e2bfdc31a
This patch essentially creates a separate, static component database for
statically-defined CID and contract ID entries, and gives it precedence over
the runtime DB. It combines the two separate databases by updating existing
code to use lookup functions which understand both databases, and then access
all entries through wrappers which defer to the appropriate underlying type.
Static component entries require no runtime relocations, and require no
writable data allocation aside from one pointer-sized BSS entry per CID, and
one bit of BSS per contract ID.
To achieve this, all strings in the static lookup tables are stored as indexes
into a static string table, all constructor functions live in a switch
statement which compiles to a relative jump table, and all writable data for
static entries is accessed by indexed lookups into BSS arrays.
We also avoid creating nsIFactory entries for static components when possible
by adding a CreateInstance method to nsFactoryEntry and the corresponding
entry wrapper to directly call the appropriate constructor method, and only
create a factory object when required by external code.
Differential Revision: https://phabricator.services.mozilla.com/D15035
--HG--
extra : rebase_source : 8d02ff3b67b8078d1ac837d8c12f54786155c6b6
extra : absorb_source : 0fe36ca220c9270e634abf5b1f320a01878e0ce7
extra : histedit_source : 51521ceae2c1b3e4e8bf63d4ed1e2e67e9468780
nsLayoutModule must be initialized in order to call into JS, but I
don't want to have to rely on calling a service in that
module. Instead, always initialize the module very early in component
manager initialization. This also makes initialization more
consistent, so things like errors in manifests won't affect when it
happens, which can result in different behavior in different builds.
I also made nsLayoutModule initialization infallible, because I can't
imagine that we can do much that is useful without it.
Another change I made is that gInitialized is set to true even in a
GPU process. This simplifies checking whether initialization has
happened already when we start up the layout module.
Differential Revision: https://phabricator.services.mozilla.com/D9583
--HG--
extra : moz-landing-system : lando
Now that the XPCOM component loader infrastructure has stopped
pretending to support other file extensions, this intermediate
interface is no longer needed.
Depends on D8171
Differential Revision: https://phabricator.services.mozilla.com/D8172
--HG--
extra : moz-landing-system : lando
JS is the only file extension actually supported, and there are a few
layers of cruft that can be eliminated if we specialize it.
This eliminates one XPCOM registration of the JS component loader.
Depends on D8170
Differential Revision: https://phabricator.services.mozilla.com/D8171
--HG--
extra : moz-landing-system : lando
Now that the XPCOM component loader infrastructure has stopped
pretending to support other file extensions, this intermediate
interface is no longer needed.
Depends on D8171
Differential Revision: https://phabricator.services.mozilla.com/D8172
--HG--
extra : moz-landing-system : lando
JS is the only file extension actually supported, and there are a few
layers of cruft that can be eliminated if we specialize it.
This eliminates one XPCOM registration of the JS component loader.
Depends on D8170
Differential Revision: https://phabricator.services.mozilla.com/D8171
--HG--
extra : moz-landing-system : lando
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.
This removes the unnecessary setting of c-basic-offset from all
python-mode files.
This was automatically generated using
perl -pi -e 's/; *c-basic-offset: *[0-9]+//'
... on the affected files.
The bulk of these files are moz.build files but there a few others as
well.
MozReview-Commit-ID: 2pPf3DEiZqx
--HG--
extra : rebase_source : 0a7dcac80b924174a2c429b093791148ea6ac204
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
Ricky Stewart
Daniel Varga
Mike Hommey
Kris Maglione
arthur.iakab
Andrew McCreight
Dorel Luca
Nika Layzell
Eric Rahm
Benjamin Smedberg
Iris Hsiao
Tom Tromey
Chris Peterson
Nicholas Nethercote
David Major
Wes Kocher
Nathan Froyd
Birunthan Mohanathas
Ehsan Akhgari
Daniel Holbert
Ms2ger
Brian O'Keefe
Mike Shal