In order to implement profile-per-install we need a mutable INI parser in early
startup. The current one is implemented in JavaScript and thus not available.
This makes the current read-only C++ INI parser mutable and removes the
JavaScript implementation.
It turns out that the two different implementations of nsIINIParserFactory and
nsIINIParser behaved slightly differently but only in ways that the single test
cared about so I've adjusted things a little to make it work.
The existing C++ implementation did not do validity checks on arguments, this
adds that making empty sections and values illegal.
Differential Revision: https://phabricator.services.mozilla.com/D3851
--HG--
rename : xpcom/tests/unit/test_iniProcessor.js => xpcom/tests/unit/test_iniParser.js
extra : source : 524941c8ed0e048ee51be1bd11082b41428ef490
extra : amend_source : 2de6cef5be97448a41733bedda29d6af34aed27a
This moves the code that detects very low memory scenarios and grabs memory
reports from the main thread event-loop to the available memory tracker.
Besides removing the overhead of the check from the event-loop code this
increases the likeliness of the reports being gathered by sampling at a
higher frequency but only when we already detected a low-memory scenario. Last
but not least this add checks for low commit-space detection alongside low
virtual-memory detection.
Differential Revision: https://phabricator.services.mozilla.com/D3669
--HG--
extra : moz-landing-system : lando
Now that :-moz-system-metric is gone, there's no real reason for the atoms to
be separate.
Differential Revision: https://phabricator.services.mozilla.com/D3497
--HG--
extra : moz-landing-system : lando
Correctness improvements:
* UTF errors are handled safely per spec instead of dangerously truncating
strings.
* There are fewer converter implementations.
Performance improvements:
* The old code did exact buffer length math, which meant doing UTF math twice
on each input string (once for length calculation and another time for
conversion). Exact length math is more complicated when handling errors
properly, which the old code didn't do. The new code does UTF math on the
string content only once (when converting) but risks allocating more than
once. There are heuristics in place to lower the probability of
reallocation in cases where the double math avoidance isn't enough of a
saving to absorb an allocation and memcpy.
* Previously, in UTF-16 <-> UTF-8 conversions, an ASCII prefix was optimized
but a single non-ASCII code point pessimized the rest of the string. The
new code tries to get back on the fast ASCII path.
* UTF-16 to Latin1 conversion guarantees less about handling of out-of-range
input to eliminate an operation from the inner loop on x86/x86_64.
* When assigning to a pre-existing string, the new code tries to reuse the
old buffer instead of first releasing the old buffer and then allocating a
new one.
* When reallocating from the new code, the memcpy covers only the data that
is part of the logical length of the old string instead of memcpying the
whole capacity. (For old callers old excess memcpy behavior is preserved
due to bogus callers. See bug 1472113.)
* UTF-8 strings in XPConnect that are in the Latin1 range are passed to
SpiderMonkey as Latin1.
New features:
* Conversion between UTF-8 and Latin1 is added in order to enable faster
future interop between Rust code (or otherwise UTF-8-using code) and text
node and SpiderMonkey code that uses Latin1.
MozReview-Commit-ID: JaJuExfILM9
Because mozilla::HashSet is much faster than PLDHashTable, and mPtrToNodeMap is
hot.
--HG--
extra : rebase_source : bd861a1cd07ae27f4d18ce5c01ca40c5bb73c035
Entry storage allocation now occurs on the first lookupForAdd()/put()/putNew().
This removes the need for init() and initialized(), and matches how
PLDHashTable/nsTHashtable work. It also removes the need for init() functions
in a lot of types that are built on top of mozilla::Hash{Map,Set}.
Pros:
- No need for init() calls and subsequent checks.
- No memory allocated for empty tables, which are not that uncommon.
Cons:
- An extra branch in lookup() and lookupForAdd(), but not in put()/putNew(),
because the existing checkOverloaded() can handle it.
Specifics:
- Construction now can take a length parameter.
- init() is removed. Explicit length-setting, when necessary, now occurs in the
constructors.
- initialized() is removed.
- capacity() now returns zero when the entry storage is absent.
- lookupForAdd() is no longer `const`, because it can instantiate the storage,
which requires modifications.
- lookupForAdd() can now return an invalid AddPtr in two cases:
- old: hashing failure (due to OOM in the hasher)
- new: OOM while instantiating entry storage
The existing failure handling paths for the old case work for the new case.
- clear(), finish(), and clearAndShrink() are replaced by clear(), compact(),
and reserve(). The old compactIfUnderloaded() is also removed.
- Capacity computation code is now in its own functions, bestCapacity() and
hashShift(). setTableSizeLog2() is removed.
- uint32_t is used throughout for capacities, instead of size_t, for
consistency with other similar values.
- changeTableSize() now takes a capacity instead of a deltaLog2, and it can now
handle !mTable.
Measurements:
- Total source code size is reduced by over 900 lines. Also, lots of existing
lines got shorter (i.e. two checks were reduced to one).
- Executable size barely changed, down by 2 KiB on Linux64. The extra branches
are compensated for by the lack of init() calls.
- Speed changed negligibly. The instruction count for Bench_Cpp_MozHash
increased from 2.84 billion to 2.89 billion but any execution time change was
well below noise.
This gcc 4.9 workaround (from bug 1377351) is no longer needed because Firefox currently requires gcc 6.1 or later (as of bug 1444274).
MozReview-Commit-ID: 9R14BDzWEoj
--HG--
extra : rebase_source : a56ec3ee321cdc76e704fe33c2c4a5b85b558889
extra : source : e0c26ec11d499058e51bc2c3d06b2e1840e77f13
This introduces the machinery needed to generate crash annotations from a YAML
file. The relevant C++ functions are updated to take a typed enum. JavaScript
calls are unaffected but they will throw if the string argument does not
correspond to one of the known entries in the C++ enum. The existing whitelists
and blacklists of annotations are also generated from the YAML file and all
duplicate code related to them has been consolidated. Once written out to the
.extra file the annotations are converted in string form and are no different
than the existing ones.
All existing annotations have been included in the list (and some obsolete ones
have been removed) and all call sites have been updated including tests where
appropriate.
--HG--
extra : source : 4f6c43f2830701ec5552e08e3f1b06fe6d045860
For all intents and purposes, this is now the same as the 'ischrome' flag.
MozReview-Commit-ID: 4z4SDs5M8zU
--HG--
extra : source : 2a5aa9de1fd9760a9245ecae815a6e02bb9eef42
This is unused now that binary component support has been removed.
MozReview-Commit-ID: KHTsF4sSoZX
--HG--
extra : source : 20a1a11b4d0ba7010b36b952bb212f3c36e6aac3
This serves no purpose now that legacy theme support has been removed.
MozReview-Commit-ID: BpLcQYfZtAZ
--HG--
extra : source : ca43bd11f43161f03d3e0dd6bd9b28d446bbe7e1
