Currently the profiler mostly uses an array of strings to represent which
features are available and in use. This patch changes the profiler core to use
a uint32_t bitfield, which is a much simpler and faster representation.
(nsProfiler and the profiler add-on still use the array of strings, alas.) The
new ProfilerFeature type defines the values in the bitfield.
One side-effect of this change is that profiler_feature_active() now can be
used to query all features. Previously it was just a subset.
Another side-effect is that profiler_get_available_features() no longer incorrectly
indicates support for Java and stack-walking when they aren't supported. (The
handling of task tracer support is unchanged, because the old code handled it
correctly.)
Add AArch64/ARM64 support to the script that produces android version
codes. Use the same scheme for AArch64 as x86, since the two
architectures don't overlap, and AArch64 should override ARM just like
x86 should override ARM.
Detect the NDK major/minor version numbers, and feed that to Breakpad.
For AArch64, some Breakpad headers try to workaround NDK oddities by
checking the ANDROID_NDK_MAJOR_VERSION and ANDROID_NDK_MINOR_VERSION
macros.
PLDHashTable takes the result of the hash function and multiplies it by
kGoldenRatio to ensure that it has a good distribution of bits across
the 32-bit hash value, and then zeroes out the low bit so that it can be
used for the collision flag. This result is called hash0. From hash0
it computes two different numbers used to find entries in the table
storage: hash1 is used to find an initial position in the table to
begin searching for an entry; hash2 is then used to repeatedly offset
that position (mod the size of the table) to build a chain of positions
to search.
In a table with capacity 2^c entries, hash1 is simply the upper c bits
of hash0. This patch does not change this.
Prior to this patch, hash2 was the c bits below hash1, padded at the low
end with zeroes when c > 16. (Note that bug 927705, changeset
1a02bec165e16f370cace3da21bb2b377a0a7242, increased the maximum capacity
from 2^23 to 2^26 since 2^23 was sometimes insufficient!) This manner
of computing hash2 is problematic because it increases the risk of long
chains for very large tables, since there is less variation in the hash2
result due to the zero padding.
So this patch changes the hash2 computation by using the low bits of
hash0 instead of shifting it around, thus avoiding 0 bits in parts of
the hash2 value that are significant.
Note that this changes what hash2 is in all cases except when the table
capacity is exactly 2^16, so it does change our hashing characteristics.
For tables with capacity less than 2^16, it should be using a different
second hash, but with the same amount of random-ish data. For tables
with capacity greater than 2^16, it should be using more random-ish
data.
Note that this patch depends on the patch for bug 1353458 in order to
avoid causing test failures.
MozReview-Commit-ID: JvnxAMBY711
--HG--
extra : rebase_source : dbde93b9312dd10fb3a549ee4098b57e1df5cadf
This allows patches to land that will change the hashtable enumeration
order, which in turn changes the ordering of the lines in
revocations.txt.
MozReview-Commit-ID: Fyuahnpky6g
--HG--
extra : rebase_source : 1e918481db566213205e330f33d6b00bdc3b4f11
The lossy conversion to ASCII here can also fail; we should handle that
as well. Rewriting the code to use MakeScopeExit also avoids tangled
logic and/or duplicating calls to ensure the destination string is
truncated on failure.
This allows us to allocate an Android SurfaceTexture in the compositor process as well
as an accompanying Surface. We can then transfer the Surface back to the content process
via binder, where it can be used for things like WebGL and video decoding.
Each SurfaceTexture/Surface pair has a unique handle. We use this handle in
layer transactions to locate the SurfaceTexture for a given Surface and composite it
appropriately.
MozReview-Commit-ID: 68VSbXdfsMH
When decoding off-thread, we can't safely access the JS runtime to get the
current JS version, and doing so causes failed assertions.
MozReview-Commit-ID: Lra437aa8SM
--HG--
extra : source : 16259c1af36e138881d18a3f8b0a803f5d4fc3ec
Nicholas Nethercote
Jim Chen
L. David Baron
Mark Banner
Nathan Froyd
Neil Deakin
James Willcox
Carsten "Tomcat" Book
Andrea Marchesini
Tim Taubert
Thinker K.F. Li
Jessica Jong
gabriellesc
Kris Maglione
Kim Moir
Jonathan Kew
Marco Castelluccio
Sebastian Hengst