Merge branch 'master' of https://github.com/MoonchildProductions/UXP into js_dom_performance-resource-timing_1

1 files changed, 0 insertions, 981 deletions

diff --git a/memory/jemalloc/src/ChangeLog b/memory/jemalloc/src/ChangeLog
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--- a/memory/jemalloc/src/ChangeLog
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@@ -1,981 +0,0 @@
-Following are change highlights associated with official releases.  Important
-bug fixes are all mentioned, but some internal enhancements are omitted here for
-brevity.  Much more detail can be found in the git revision history:
-
-    https://github.com/jemalloc/jemalloc
-
-* 4.3.1 (November 7, 2016)
-
-  Bug fixes:
-  - Fix a severe virtual memory leak.  This regression was first released in
-    4.3.0.  (@interwq, @jasone)
-  - Refactor atomic and prng APIs to restore support for 32-bit platforms that
-    use pre-C11 toolchains, e.g. FreeBSD's mips.  (@jasone)
-
-* 4.3.0 (November 4, 2016)
-
-  This is the first release that passes the test suite for multiple Windows
-  configurations, thanks in large part to @glandium setting up continuous
-  integration via AppVeyor (and Travis CI for Linux and OS X).
-
-  New features:
-  - Add "J" (JSON) support to malloc_stats_print().  (@jasone)
-  - Add Cray compiler support.  (@ronawho)
-
-  Optimizations:
-  - Add/use adaptive spinning for bootstrapping and radix tree node
-    initialization.  (@jasone)
-
-  Bug fixes:
-  - Fix large allocation to search starting in the optimal size class heap,
-    which can substantially reduce virtual memory churn and fragmentation.  This
-    regression was first released in 4.0.0.  (@mjp41, @jasone)
-  - Fix stats.arenas.<i>.nthreads accounting.  (@interwq)
-  - Fix and simplify decay-based purging.  (@jasone)
-  - Make DSS (sbrk(2)-related) operations lockless, which resolves potential
-    deadlocks during thread exit.  (@jasone)
-  - Fix over-sized allocation of radix tree leaf nodes.  (@mjp41, @ogaun,
-    @jasone)
-  - Fix over-sized allocation of arena_t (plus associated stats) data
-    structures.  (@jasone, @interwq)
-  - Fix EXTRA_CFLAGS to not affect configuration.  (@jasone)
-  - Fix a Valgrind integration bug.  (@ronawho)
-  - Disallow 0x5a junk filling when running in Valgrind.  (@jasone)
-  - Fix a file descriptor leak on Linux.  This regression was first released in
-    4.2.0.  (@vsarunas, @jasone)
-  - Fix static linking of jemalloc with glibc.  (@djwatson)
-  - Use syscall(2) rather than {open,read,close}(2) during boot on Linux.  This
-    works around other libraries' system call wrappers performing reentrant
-    allocation.  (@kspinka, @Whissi, @jasone)
-  - Fix OS X default zone replacement to work with OS X 10.12.  (@glandium,
-    @jasone)
-  - Fix cached memory management to avoid needless commit/decommit operations
-    during purging, which resolves permanent virtual memory map fragmentation
-    issues on Windows.  (@mjp41, @jasone)
-  - Fix TSD fetches to avoid (recursive) allocation.  This is relevant to
-    non-TLS and Windows configurations.  (@jasone)
-  - Fix malloc_conf overriding to work on Windows.  (@jasone)
-  - Forcibly disable lazy-lock on Windows (was forcibly *enabled*).  (@jasone)
-
-* 4.2.1 (June 8, 2016)
-
-  Bug fixes:
-  - Fix bootstrapping issues for configurations that require allocation during
-    tsd initialization (e.g. --disable-tls).  (@cferris1000, @jasone)
-  - Fix gettimeofday() version of nstime_update().  (@ronawho)
-  - Fix Valgrind regressions in calloc() and chunk_alloc_wrapper().  (@ronawho)
-  - Fix potential VM map fragmentation regression.  (@jasone)
-  - Fix opt_zero-triggered in-place huge reallocation zeroing.  (@jasone)
-  - Fix heap profiling context leaks in reallocation edge cases.  (@jasone)
-
-* 4.2.0 (May 12, 2016)
-
-  New features:
-  - Add the arena.<i>.reset mallctl, which makes it possible to discard all of
-    an arena's allocations in a single operation.  (@jasone)
-  - Add the stats.retained and stats.arenas.<i>.retained statistics.  (@jasone)
-  - Add the --with-version configure option.  (@jasone)
-  - Support --with-lg-page values larger than actual page size.  (@jasone)
-
-  Optimizations:
-  - Use pairing heaps rather than red-black trees for various hot data
-    structures.  (@djwatson, @jasone)
-  - Streamline fast paths of rtree operations.  (@jasone)
-  - Optimize the fast paths of calloc() and [m,d,sd]allocx().  (@jasone)
-  - Decommit unused virtual memory if the OS does not overcommit.  (@jasone)
-  - Specify MAP_NORESERVE on Linux if [heuristic] overcommit is active, in order
-    to avoid unfortunate interactions during fork(2).  (@jasone)
-
-  Bug fixes:
-  - Fix chunk accounting related to triggering gdump profiles.  (@jasone)
-  - Link against librt for clock_gettime(2) if glibc < 2.17.  (@jasone)
-  - Scale leak report summary according to sampling probability.  (@jasone)
-
-* 4.1.1 (May 3, 2016)
-
-  This bugfix release resolves a variety of mostly minor issues, though the
-  bitmap fix is critical for 64-bit Windows.
-
-  Bug fixes:
-  - Fix the linear scan version of bitmap_sfu() to shift by the proper amount
-    even when sizeof(long) is not the same as sizeof(void *), as on 64-bit
-    Windows.  (@jasone)
-  - Fix hashing functions to avoid unaligned memory accesses (and resulting
-    crashes).  This is relevant at least to some ARM-based platforms.
-    (@rkmisra)
-  - Fix fork()-related lock rank ordering reversals.  These reversals were
-    unlikely to cause deadlocks in practice except when heap profiling was
-    enabled and active.  (@jasone)
-  - Fix various chunk leaks in OOM code paths.  (@jasone)
-  - Fix malloc_stats_print() to print opt.narenas correctly.  (@jasone)
-  - Fix MSVC-specific build/test issues.  (@rustyx, @yuslepukhin)
-  - Fix a variety of test failures that were due to test fragility rather than
-    core bugs.  (@jasone)
-
-* 4.1.0 (February 28, 2016)
-
-  This release is primarily about optimizations, but it also incorporates a lot
-  of portability-motivated refactoring and enhancements.  Many people worked on
-  this release, to an extent that even with the omission here of minor changes
-  (see git revision history), and of the people who reported and diagnosed
-  issues, so much of the work was contributed that starting with this release,
-  changes are annotated with author credits to help reflect the collaborative
-  effort involved.
-
-  New features:
-  - Implement decay-based unused dirty page purging, a major optimization with
-    mallctl API impact.  This is an alternative to the existing ratio-based
-    unused dirty page purging, and is intended to eventually become the sole
-    purging mechanism.  New mallctls:
-    + opt.purge
-    + opt.decay_time
-    + arena.<i>.decay
-    + arena.<i>.decay_time
-    + arenas.decay_time
-    + stats.arenas.<i>.decay_time
-    (@jasone, @cevans87)
-  - Add --with-malloc-conf, which makes it possible to embed a default
-    options string during configuration.  This was motivated by the desire to
-    specify --with-malloc-conf=purge:decay , since the default must remain
-    purge:ratio until the 5.0.0 release.  (@jasone)
-  - Add MS Visual Studio 2015 support.  (@rustyx, @yuslepukhin)
-  - Make *allocx() size class overflow behavior defined.  The maximum
-    size class is now less than PTRDIFF_MAX to protect applications against
-    numerical overflow, and all allocation functions are guaranteed to indicate
-    errors rather than potentially crashing if the request size exceeds the
-    maximum size class.  (@jasone)
-  - jeprof:
-    + Add raw heap profile support.  (@jasone)
-    + Add --retain and --exclude for backtrace symbol filtering.  (@jasone)
-
-  Optimizations:
-  - Optimize the fast path to combine various bootstrapping and configuration
-    checks and execute more streamlined code in the common case.  (@interwq)
-  - Use linear scan for small bitmaps (used for small object tracking).  In
-    addition to speeding up bitmap operations on 64-bit systems, this reduces
-    allocator metadata overhead by approximately 0.2%.  (@djwatson)
-  - Separate arena_avail trees, which substantially speeds up run tree
-    operations.  (@djwatson)
-  - Use memoization (boot-time-computed table) for run quantization.  Separate
-    arena_avail trees reduced the importance of this optimization.  (@jasone)
-  - Attempt mmap-based in-place huge reallocation.  This can dramatically speed
-    up incremental huge reallocation.  (@jasone)
-
-  Incompatible changes:
-  - Make opt.narenas unsigned rather than size_t.  (@jasone)
-
-  Bug fixes:
-  - Fix stats.cactive accounting regression.  (@rustyx, @jasone)
-  - Handle unaligned keys in hash().  This caused problems for some ARM systems.
-    (@jasone, @cferris1000)
-  - Refactor arenas array.  In addition to fixing a fork-related deadlock, this
-    makes arena lookups faster and simpler.  (@jasone)
-  - Move retained memory allocation out of the default chunk allocation
-    function, to a location that gets executed even if the application installs
-    a custom chunk allocation function.  This resolves a virtual memory leak.
-    (@buchgr)
-  - Fix a potential tsd cleanup leak.  (@cferris1000, @jasone)
-  - Fix run quantization.  In practice this bug had no impact unless
-    applications requested memory with alignment exceeding one page.
-    (@jasone, @djwatson)
-  - Fix LinuxThreads-specific bootstrapping deadlock.  (Cosmin Paraschiv)
-  - jeprof:
-    + Don't discard curl options if timeout is not defined.  (@djwatson)
-    + Detect failed profile fetches.  (@djwatson)
-  - Fix stats.arenas.<i>.{dss,lg_dirty_mult,decay_time,pactive,pdirty} for
-    --disable-stats case.  (@jasone)
-
-* 4.0.4 (October 24, 2015)
-
-  This bugfix release fixes another xallocx() regression.  No other regressions
-  have come to light in over a month, so this is likely a good starting point
-  for people who prefer to wait for "dot one" releases with all the major issues
-  shaken out.
-
-  Bug fixes:
-  - Fix xallocx(..., MALLOCX_ZERO to zero the last full trailing page of large
-    allocations that have been randomly assigned an offset of 0 when
-    --enable-cache-oblivious configure option is enabled.
-
-* 4.0.3 (September 24, 2015)
-
-  This bugfix release continues the trend of xallocx() and heap profiling fixes.
-
-  Bug fixes:
-  - Fix xallocx(..., MALLOCX_ZERO) to zero all trailing bytes of large
-    allocations when --enable-cache-oblivious configure option is enabled.
-  - Fix xallocx(..., MALLOCX_ZERO) to zero trailing bytes of huge allocations
-    when resizing from/to a size class that is not a multiple of the chunk size.
-  - Fix prof_tctx_dump_iter() to filter out nodes that were created after heap
-    profile dumping started.
-  - Work around a potentially bad thread-specific data initialization
-    interaction with NPTL (glibc's pthreads implementation).
-
-* 4.0.2 (September 21, 2015)
-
-  This bugfix release addresses a few bugs specific to heap profiling.
-
-  Bug fixes:
-  - Fix ixallocx_prof_sample() to never modify nor create sampled small
-    allocations.  xallocx() is in general incapable of moving small allocations,
-    so this fix removes buggy code without loss of generality.
-  - Fix irallocx_prof_sample() to always allocate large regions, even when
-    alignment is non-zero.
-  - Fix prof_alloc_rollback() to read tdata from thread-specific data rather
-    than dereferencing a potentially invalid tctx.
-
-* 4.0.1 (September 15, 2015)
-
-  This is a bugfix release that is somewhat high risk due to the amount of
-  refactoring required to address deep xallocx() problems.  As a side effect of
-  these fixes, xallocx() now tries harder to partially fulfill requests for
-  optional extra space.  Note that a couple of minor heap profiling
-  optimizations are included, but these are better thought of as performance
-  fixes that were integral to disovering most of the other bugs.
-
-  Optimizations:
-  - Avoid a chunk metadata read in arena_prof_tctx_set(), since it is in the
-    fast path when heap profiling is enabled.  Additionally, split a special
-    case out into arena_prof_tctx_reset(), which also avoids chunk metadata
-    reads.
-  - Optimize irallocx_prof() to optimistically update the sampler state.  The
-    prior implementation appears to have been a holdover from when
-    rallocx()/xallocx() functionality was combined as rallocm().
-
-  Bug fixes:
-  - Fix TLS configuration such that it is enabled by default for platforms on
-    which it works correctly.
-  - Fix arenas_cache_cleanup() and arena_get_hard() to handle
-    allocation/deallocation within the application's thread-specific data
-    cleanup functions even after arenas_cache is torn down.
-  - Fix xallocx() bugs related to size+extra exceeding HUGE_MAXCLASS.
-  - Fix chunk purge hook calls for in-place huge shrinking reallocation to
-    specify the old chunk size rather than the new chunk size.  This bug caused
-    no correctness issues for the default chunk purge function, but was
-    visible to custom functions set via the "arena.<i>.chunk_hooks" mallctl.
-  - Fix heap profiling bugs:
-    + Fix heap profiling to distinguish among otherwise identical sample sites
-      with interposed resets (triggered via the "prof.reset" mallctl).  This bug
-      could cause data structure corruption that would most likely result in a
-      segfault.
-    + Fix irealloc_prof() to prof_alloc_rollback() on OOM.
-    + Make one call to prof_active_get_unlocked() per allocation event, and use
-      the result throughout the relevant functions that handle an allocation
-      event.  Also add a missing check in prof_realloc().  These fixes protect
-      allocation events against concurrent prof_active changes.
-    + Fix ixallocx_prof() to pass usize_max and zero to ixallocx_prof_sample()
-      in the correct order.
-    + Fix prof_realloc() to call prof_free_sampled_object() after calling
-      prof_malloc_sample_object().  Prior to this fix, if tctx and old_tctx were
-      the same, the tctx could have been prematurely destroyed.
-  - Fix portability bugs:
-    + Don't bitshift by negative amounts when encoding/decoding run sizes in
-      chunk header maps.  This affected systems with page sizes greater than 8
-      KiB.
-    + Rename index_t to szind_t to avoid an existing type on Solaris.
-    + Add JEMALLOC_CXX_THROW to the memalign() function prototype, in order to
-      match glibc and avoid compilation errors when including both
-      jemalloc/jemalloc.h and malloc.h in C++ code.
-    + Don't assume that /bin/sh is appropriate when running size_classes.sh
-      during configuration.
-    + Consider __sparcv9 a synonym for __sparc64__ when defining LG_QUANTUM.
-    + Link tests to librt if it contains clock_gettime(2).
-
-* 4.0.0 (August 17, 2015)
-
-  This version contains many speed and space optimizations, both minor and
-  major.  The major themes are generalization, unification, and simplification.
-  Although many of these optimizations cause no visible behavior change, their
-  cumulative effect is substantial.
-
-  New features:
-  - Normalize size class spacing to be consistent across the complete size
-    range.  By default there are four size classes per size doubling, but this
-    is now configurable via the --with-lg-size-class-group option.  Also add the
-    --with-lg-page, --with-lg-page-sizes, --with-lg-quantum, and
-    --with-lg-tiny-min options, which can be used to tweak page and size class
-    settings.  Impacts:
-    + Worst case performance for incrementally growing/shrinking reallocation
-      is improved because there are far fewer size classes, and therefore
-      copying happens less often.
-    + Internal fragmentation is limited to 20% for all but the smallest size
-      classes (those less than four times the quantum).  (1B + 4 KiB)
-      and (1B + 4 MiB) previously suffered nearly 50% internal fragmentation.
-    + Chunk fragmentation tends to be lower because there are fewer distinct run
-      sizes to pack.
-  - Add support for explicit tcaches.  The "tcache.create", "tcache.flush", and
-    "tcache.destroy" mallctls control tcache lifetime and flushing, and the
-    MALLOCX_TCACHE(tc) and MALLOCX_TCACHE_NONE flags to the *allocx() API
-    control which tcache is used for each operation.
-  - Implement per thread heap profiling, as well as the ability to
-    enable/disable heap profiling on a per thread basis.  Add the "prof.reset",
-    "prof.lg_sample", "thread.prof.name", "thread.prof.active",
-    "opt.prof_thread_active_init", "prof.thread_active_init", and
-    "thread.prof.active" mallctls.
-  - Add support for per arena application-specified chunk allocators, configured
-    via the "arena.<i>.chunk_hooks" mallctl.
-  - Refactor huge allocation to be managed by arenas, so that arenas now
-    function as general purpose independent allocators.  This is important in
-    the context of user-specified chunk allocators, aside from the scalability
-    benefits.  Related new statistics:
-    + The "stats.arenas.<i>.huge.allocated", "stats.arenas.<i>.huge.nmalloc",
-      "stats.arenas.<i>.huge.ndalloc", and "stats.arenas.<i>.huge.nrequests"
-      mallctls provide high level per arena huge allocation statistics.
-    + The "arenas.nhchunks", "arenas.hchunk.<i>.size",
-      "stats.arenas.<i>.hchunks.<j>.nmalloc",
-      "stats.arenas.<i>.hchunks.<j>.ndalloc",
-      "stats.arenas.<i>.hchunks.<j>.nrequests", and
-      "stats.arenas.<i>.hchunks.<j>.curhchunks" mallctls provide per size class
-      statistics.
-  - Add the 'util' column to malloc_stats_print() output, which reports the
-    proportion of available regions that are currently in use for each small
-    size class.
-  - Add "alloc" and "free" modes for for junk filling (see the "opt.junk"
-    mallctl), so that it is possible to separately enable junk filling for
-    allocation versus deallocation.
-  - Add the jemalloc-config script, which provides information about how
-    jemalloc was configured, and how to integrate it into application builds.
-  - Add metadata statistics, which are accessible via the "stats.metadata",
-    "stats.arenas.<i>.metadata.mapped", and
-    "stats.arenas.<i>.metadata.allocated" mallctls.
-  - Add the "stats.resident" mallctl, which reports the upper limit of
-    physically resident memory mapped by the allocator.
-  - Add per arena control over unused dirty page purging, via the
-    "arenas.lg_dirty_mult", "arena.<i>.lg_dirty_mult", and
-    "stats.arenas.<i>.lg_dirty_mult" mallctls.
-  - Add the "prof.gdump" mallctl, which makes it possible to toggle the gdump
-    feature on/off during program execution.
-  - Add sdallocx(), which implements sized deallocation.  The primary
-    optimization over dallocx() is the removal of a metadata read, which often
-    suffers an L1 cache miss.
-  - Add missing header includes in jemalloc/jemalloc.h, so that applications
-    only have to #include <jemalloc/jemalloc.h>.
-  - Add support for additional platforms:
-    + Bitrig
-    + Cygwin
-    + DragonFlyBSD
-    + iOS
-    + OpenBSD
-    + OpenRISC/or1k
-
-  Optimizations:
-  - Maintain dirty runs in per arena LRUs rather than in per arena trees of
-    dirty-run-containing chunks.  In practice this change significantly reduces
-    dirty page purging volume.
-  - Integrate whole chunks into the unused dirty page purging machinery.  This
-    reduces the cost of repeated huge allocation/deallocation, because it
-    effectively introduces a cache of chunks.
-  - Split the arena chunk map into two separate arrays, in order to increase
-    cache locality for the frequently accessed bits.
-  - Move small run metadata out of runs, into arena chunk headers.  This reduces
-    run fragmentation, smaller runs reduce external fragmentation for small size
-    classes, and packed (less uniformly aligned) metadata layout improves CPU
-    cache set distribution.
-  - Randomly distribute large allocation base pointer alignment relative to page
-    boundaries in order to more uniformly utilize CPU cache sets.  This can be
-    disabled via the --disable-cache-oblivious configure option, and queried via
-    the "config.cache_oblivious" mallctl.
-  - Micro-optimize the fast paths for the public API functions.
-  - Refactor thread-specific data to reside in a single structure.  This assures
-    that only a single TLS read is necessary per call into the public API.
-  - Implement in-place huge allocation growing and shrinking.
-  - Refactor rtree (radix tree for chunk lookups) to be lock-free, and make
-    additional optimizations that reduce maximum lookup depth to one or two
-    levels.  This resolves what was a concurrency bottleneck for per arena huge
-    allocation, because a global data structure is critical for determining
-    which arenas own which huge allocations.
-
-  Incompatible changes:
-  - Replace --enable-cc-silence with --disable-cc-silence to suppress spurious
-    warnings by default.
-  - Assure that the constness of malloc_usable_size()'s return type matches that
-    of the system implementation.
-  - Change the heap profile dump format to support per thread heap profiling,
-    rename pprof to jeprof, and enhance it with the --thread=<n> option.  As a
-    result, the bundled jeprof must now be used rather than the upstream
-    (gperftools) pprof.
-  - Disable "opt.prof_final" by default, in order to avoid atexit(3), which can
-    internally deadlock on some platforms.
-  - Change the "arenas.nlruns" mallctl type from size_t to unsigned.
-  - Replace the "stats.arenas.<i>.bins.<j>.allocated" mallctl with
-    "stats.arenas.<i>.bins.<j>.curregs".
-  - Ignore MALLOC_CONF in set{uid,gid,cap} binaries.
-  - Ignore MALLOCX_ARENA(a) in dallocx(), in favor of using the
-    MALLOCX_TCACHE(tc) and MALLOCX_TCACHE_NONE flags to control tcache usage.
-
-  Removed features:
-  - Remove the *allocm() API, which is superseded by the *allocx() API.
-  - Remove the --enable-dss options, and make dss non-optional on all platforms
-    which support sbrk(2).
-  - Remove the "arenas.purge" mallctl, which was obsoleted by the
-    "arena.<i>.purge" mallctl in 3.1.0.
-  - Remove the unnecessary "opt.valgrind" mallctl; jemalloc automatically
-    detects whether it is running inside Valgrind.
-  - Remove the "stats.huge.allocated", "stats.huge.nmalloc", and
-    "stats.huge.ndalloc" mallctls.
-  - Remove the --enable-mremap option.
-  - Remove the "stats.chunks.current", "stats.chunks.total", and
-    "stats.chunks.high" mallctls.
-
-  Bug fixes:
-  - Fix the cactive statistic to decrease (rather than increase) when active
-    memory decreases.  This regression was first released in 3.5.0.
-  - Fix OOM handling in memalign() and valloc().  A variant of this bug existed
-    in all releases since 2.0.0, which introduced these functions.
-  - Fix an OOM-related regression in arena_tcache_fill_small(), which could
-    cause cache corruption on OOM.  This regression was present in all releases
-    from 2.2.0 through 3.6.0.
-  - Fix size class overflow handling for malloc(), posix_memalign(), memalign(),
-    calloc(), and realloc() when profiling is enabled.
-  - Fix the "arena.<i>.dss" mallctl to return an error if "primary" or
-    "secondary" precedence is specified, but sbrk(2) is not supported.
-  - Fix fallback lg_floor() implementations to handle extremely large inputs.
-  - Ensure the default purgeable zone is after the default zone on OS X.
-  - Fix latent bugs in atomic_*().
-  - Fix the "arena.<i>.dss" mallctl to handle read-only calls.
-  - Fix tls_model configuration to enable the initial-exec model when possible.
-  - Mark malloc_conf as a weak symbol so that the application can override it.
-  - Correctly detect glibc's adaptive pthread mutexes.
-  - Fix the --without-export configure option.
-
-* 3.6.0 (March 31, 2014)
-
-  This version contains a critical bug fix for a regression present in 3.5.0 and
-  3.5.1.
-
-  Bug fixes:
-  - Fix a regression in arena_chunk_alloc() that caused crashes during
-    small/large allocation if chunk allocation failed.  In the absence of this
-    bug, chunk allocation failure would result in allocation failure, e.g.  NULL
-    return from malloc().  This regression was introduced in 3.5.0.
-  - Fix backtracing for gcc intrinsics-based backtracing by specifying
-    -fno-omit-frame-pointer to gcc.  Note that the application (and all the
-    libraries it links to) must also be compiled with this option for
-    backtracing to be reliable.
-  - Use dss allocation precedence for huge allocations as well as small/large
-    allocations.
-  - Fix test assertion failure message formatting.  This bug did not manifest on
-    x86_64 systems because of implementation subtleties in va_list.
-  - Fix inconsequential test failures for hash and SFMT code.
-
-  New features:
-  - Support heap profiling on FreeBSD.  This feature depends on the proc
-    filesystem being mounted during heap profile dumping.
-
-* 3.5.1 (February 25, 2014)
-
-  This version primarily addresses minor bugs in test code.
-
-  Bug fixes:
-  - Configure Solaris/Illumos to use MADV_FREE.
-  - Fix junk filling for mremap(2)-based huge reallocation.  This is only
-    relevant if configuring with the --enable-mremap option specified.
-  - Avoid compilation failure if 'restrict' C99 keyword is not supported by the
-    compiler.
-  - Add a configure test for SSE2 rather than assuming it is usable on i686
-    systems.  This fixes test compilation errors, especially on 32-bit Linux
-    systems.
-  - Fix mallctl argument size mismatches (size_t vs. uint64_t) in the stats unit
-    test.
-  - Fix/remove flawed alignment-related overflow tests.
-  - Prevent compiler optimizations that could change backtraces in the
-    prof_accum unit test.
-
-* 3.5.0 (January 22, 2014)
-
-  This version focuses on refactoring and automated testing, though it also
-  includes some non-trivial heap profiling optimizations not mentioned below.
-
-  New features:
-  - Add the *allocx() API, which is a successor to the experimental *allocm()
-    API.  The *allocx() functions are slightly simpler to use because they have
-    fewer parameters, they directly return the results of primary interest, and
-    mallocx()/rallocx() avoid the strict aliasing pitfall that
-    allocm()/rallocm() share with posix_memalign().  Note that *allocm() is
-    slated for removal in the next non-bugfix release.
-  - Add support for LinuxThreads.
-
-  Bug fixes:
-  - Unless heap profiling is enabled, disable floating point code and don't link
-    with libm.  This, in combination with e.g. EXTRA_CFLAGS=-mno-sse on x64
-    systems, makes it possible to completely disable floating point register
-    use.  Some versions of glibc neglect to save/restore caller-saved floating
-    point registers during dynamic lazy symbol loading, and the symbol loading
-    code uses whatever malloc the application happens to have linked/loaded
-    with, the result being potential floating point register corruption.
-  - Report ENOMEM rather than EINVAL if an OOM occurs during heap profiling
-    backtrace creation in imemalign().  This bug impacted posix_memalign() and
-    aligned_alloc().
-  - Fix a file descriptor leak in a prof_dump_maps() error path.
-  - Fix prof_dump() to close the dump file descriptor for all relevant error
-    paths.
-  - Fix rallocm() to use the arena specified by the ALLOCM_ARENA(s) flag for
-    allocation, not just deallocation.
-  - Fix a data race for large allocation stats counters.
-  - Fix a potential infinite loop during thread exit.  This bug occurred on
-    Solaris, and could affect other platforms with similar pthreads TSD
-    implementations.
-  - Don't junk-fill reallocations unless usable size changes.  This fixes a
-    violation of the *allocx()/*allocm() semantics.
-  - Fix growing large reallocation to junk fill new space.
-  - Fix huge deallocation to junk fill when munmap is disabled.
-  - Change the default private namespace prefix from empty to je_, and change
-    --with-private-namespace-prefix so that it prepends an additional prefix
-    rather than replacing je_.  This reduces the likelihood of applications
-    which statically link jemalloc experiencing symbol name collisions.
-  - Add missing private namespace mangling (relevant when
-    --with-private-namespace is specified).
-  - Add and use JEMALLOC_INLINE_C so that static inline functions are marked as
-    static even for debug builds.
-  - Add a missing mutex unlock in a malloc_init_hard() error path.  In practice
-    this error path is never executed.
-  - Fix numerous bugs in malloc_strotumax() error handling/reporting.  These
-    bugs had no impact except for malformed inputs.
-  - Fix numerous bugs in malloc_snprintf().  These bugs were not exercised by
-    existing calls, so they had no impact.
-
-* 3.4.1 (October 20, 2013)
-
-  Bug fixes:
-  - Fix a race in the "arenas.extend" mallctl that could cause memory corruption
-    of internal data structures and subsequent crashes.
-  - Fix Valgrind integration flaws that caused Valgrind warnings about reads of
-    uninitialized memory in:
-    + arena chunk headers
-    + internal zero-initialized data structures (relevant to tcache and prof
-      code)
-  - Preserve errno during the first allocation.  A readlink(2) call during
-    initialization fails unless /etc/malloc.conf exists, so errno was typically
-    set during the first allocation prior to this fix.
-  - Fix compilation warnings reported by gcc 4.8.1.
-
-* 3.4.0 (June 2, 2013)
-
-  This version is essentially a small bugfix release, but the addition of
-  aarch64 support requires that the minor version be incremented.
-
-  Bug fixes:
-  - Fix race-triggered deadlocks in chunk_record().  These deadlocks were
-    typically triggered by multiple threads concurrently deallocating huge
-    objects.
-
-  New features:
-  - Add support for the aarch64 architecture.
-
-* 3.3.1 (March 6, 2013)
-
-  This version fixes bugs that are typically encountered only when utilizing
-  custom run-time options.
-
-  Bug fixes:
-  - Fix a locking order bug that could cause deadlock during fork if heap
-    profiling were enabled.
-  - Fix a chunk recycling bug that could cause the allocator to lose track of
-    whether a chunk was zeroed.  On FreeBSD, NetBSD, and OS X, it could cause
-    corruption if allocating via sbrk(2) (unlikely unless running with the
-    "dss:primary" option specified).  This was completely harmless on Linux
-    unless using mlockall(2) (and unlikely even then, unless the
-    --disable-munmap configure option or the "dss:primary" option was
-    specified).  This regression was introduced in 3.1.0 by the
-    mlockall(2)/madvise(2) interaction fix.
-  - Fix TLS-related memory corruption that could occur during thread exit if the
-    thread never allocated memory.  Only the quarantine and prof facilities were
-    susceptible.
-  - Fix two quarantine bugs:
-    + Internal reallocation of the quarantined object array leaked the old
-      array.
-    + Reallocation failure for internal reallocation of the quarantined object
-      array (very unlikely) resulted in memory corruption.
-  - Fix Valgrind integration to annotate all internally allocated memory in a
-    way that keeps Valgrind happy about internal data structure access.
-  - Fix building for s390 systems.
-
-* 3.3.0 (January 23, 2013)
-
-  This version includes a few minor performance improvements in addition to the
-  listed new features and bug fixes.
-
-  New features:
-  - Add clipping support to lg_chunk option processing.
-  - Add the --enable-ivsalloc option.
-  - Add the --without-export option.
-  - Add the --disable-zone-allocator option.
-
-  Bug fixes:
-  - Fix "arenas.extend" mallctl to output the number of arenas.
-  - Fix chunk_recycle() to unconditionally inform Valgrind that returned memory
-    is undefined.
-  - Fix build break on FreeBSD related to alloca.h.
-
-* 3.2.0 (November 9, 2012)
-
-  In addition to a couple of bug fixes, this version modifies page run
-  allocation and dirty page purging algorithms in order to better control
-  page-level virtual memory fragmentation.
-
-  Incompatible changes:
-  - Change the "opt.lg_dirty_mult" default from 5 to 3 (32:1 to 8:1).
-
-  Bug fixes:
-  - Fix dss/mmap allocation precedence code to use recyclable mmap memory only
-    after primary dss allocation fails.
-  - Fix deadlock in the "arenas.purge" mallctl.  This regression was introduced
-    in 3.1.0 by the addition of the "arena.<i>.purge" mallctl.
-
-* 3.1.0 (October 16, 2012)
-
-  New features:
-  - Auto-detect whether running inside Valgrind, thus removing the need to
-    manually specify MALLOC_CONF=valgrind:true.
-  - Add the "arenas.extend" mallctl, which allows applications to create
-    manually managed arenas.
-  - Add the ALLOCM_ARENA() flag for {,r,d}allocm().
-  - Add the "opt.dss", "arena.<i>.dss", and "stats.arenas.<i>.dss" mallctls,
-    which provide control over dss/mmap precedence.
-  - Add the "arena.<i>.purge" mallctl, which obsoletes "arenas.purge".
-  - Define LG_QUANTUM for hppa.
-
-  Incompatible changes:
-  - Disable tcache by default if running inside Valgrind, in order to avoid
-    making unallocated objects appear reachable to Valgrind.
-  - Drop const from malloc_usable_size() argument on Linux.
-
-  Bug fixes:
-  - Fix heap profiling crash if sampled object is freed via realloc(p, 0).
-  - Remove const from __*_hook variable declarations, so that glibc can modify
-    them during process forking.
-  - Fix mlockall(2)/madvise(2) interaction.
-  - Fix fork(2)-related deadlocks.
-  - Fix error return value for "thread.tcache.enabled" mallctl.
-
-* 3.0.0 (May 11, 2012)
-
-  Although this version adds some major new features, the primary focus is on
-  internal code cleanup that facilitates maintainability and portability, most
-  of which is not reflected in the ChangeLog.  This is the first release to
-  incorporate substantial contributions from numerous other developers, and the
-  result is a more broadly useful allocator (see the git revision history for
-  contribution details).  Note that the license has been unified, thanks to
-  Facebook granting a license under the same terms as the other copyright
-  holders (see COPYING).
-
-  New features:
-  - Implement Valgrind support, redzones, and quarantine.
-  - Add support for additional platforms:
-    + FreeBSD
-    + Mac OS X Lion
-    + MinGW
-    + Windows (no support yet for replacing the system malloc)
-  - Add support for additional architectures:
-    + MIPS
-    + SH4
-    + Tilera
-  - Add support for cross compiling.
-  - Add nallocm(), which rounds a request size up to the nearest size class
-    without actually allocating.
-  - Implement aligned_alloc() (blame C11).
-  - Add the "thread.tcache.enabled" mallctl.
-  - Add the "opt.prof_final" mallctl.
-  - Update pprof (from gperftools 2.0).
-  - Add the --with-mangling option.
-  - Add the --disable-experimental option.
-  - Add the --disable-munmap option, and make it the default on Linux.
-  - Add the --enable-mremap option, which disables use of mremap(2) by default.
-
-  Incompatible changes:
-  - Enable stats by default.
-  - Enable fill by default.
-  - Disable lazy locking by default.
-  - Rename the "tcache.flush" mallctl to "thread.tcache.flush".
-  - Rename the "arenas.pagesize" mallctl to "arenas.page".
-  - Change the "opt.lg_prof_sample" default from 0 to 19 (1 B to 512 KiB).
-  - Change the "opt.prof_accum" default from true to false.
-
-  Removed features:
-  - Remove the swap feature, including the "config.swap", "swap.avail",
-    "swap.prezeroed", "swap.nfds", and "swap.fds" mallctls.
-  - Remove highruns statistics, including the
-    "stats.arenas.<i>.bins.<j>.highruns" and
-    "stats.arenas.<i>.lruns.<j>.highruns" mallctls.
-  - As part of small size class refactoring, remove the "opt.lg_[qc]space_max",
-    "arenas.cacheline", "arenas.subpage", "arenas.[tqcs]space_{min,max}", and
-    "arenas.[tqcs]bins" mallctls.
-  - Remove the "arenas.chunksize" mallctl.
-  - Remove the "opt.lg_prof_tcmax" option.
-  - Remove the "opt.lg_prof_bt_max" option.
-  - Remove the "opt.lg_tcache_gc_sweep" option.
-  - Remove the --disable-tiny option, including the "config.tiny" mallctl.
-  - Remove the --enable-dynamic-page-shift configure option.
-  - Remove the --enable-sysv configure option.
-
-  Bug fixes:
-  - Fix a statistics-related bug in the "thread.arena" mallctl that could cause
-    invalid statistics and crashes.
-  - Work around TLS deallocation via free() on Linux.  This bug could cause
-    write-after-free memory corruption.
-  - Fix a potential deadlock that could occur during interval- and
-    growth-triggered heap profile dumps.
-  - Fix large calloc() zeroing bugs due to dropping chunk map unzeroed flags.
-  - Fix chunk_alloc_dss() to stop claiming memory is zeroed.  This bug could
-    cause memory corruption and crashes with --enable-dss specified.
-  - Fix fork-related bugs that could cause deadlock in children between fork
-    and exec.
-  - Fix malloc_stats_print() to honor 'b' and 'l' in the opts parameter.
-  - Fix realloc(p, 0) to act like free(p).
-  - Do not enforce minimum alignment in memalign().
-  - Check for NULL pointer in malloc_usable_size().
-  - Fix an off-by-one heap profile statistics bug that could be observed in
-    interval- and growth-triggered heap profiles.
-  - Fix the "epoch" mallctl to update cached stats even if the passed in epoch
-    is 0.
-  - Fix bin->runcur management to fix a layout policy bug.  This bug did not
-    affect correctness.
-  - Fix a bug in choose_arena_hard() that potentially caused more arenas to be
-    initialized than necessary.
-  - Add missing "opt.lg_tcache_max" mallctl implementation.
-  - Use glibc allocator hooks to make mixed allocator usage less likely.
-  - Fix build issues for --disable-tcache.
-  - Don't mangle pthread_create() when --with-private-namespace is specified.
-
-* 2.2.5 (November 14, 2011)
-
-  Bug fixes:
-  - Fix huge_ralloc() race when using mremap(2).  This is a serious bug that
-    could cause memory corruption and/or crashes.
-  - Fix huge_ralloc() to maintain chunk statistics.
-  - Fix malloc_stats_print(..., "a") output.
-
-* 2.2.4 (November 5, 2011)
-
-  Bug fixes:
-  - Initialize arenas_tsd before using it.  This bug existed for 2.2.[0-3], as
-    well as for --disable-tls builds in earlier releases.
-  - Do not assume a 4 KiB page size in test/rallocm.c.
-
-* 2.2.3 (August 31, 2011)
-
-  This version fixes numerous bugs related to heap profiling.
-
-  Bug fixes:
-  - Fix a prof-related race condition.  This bug could cause memory corruption,
-    but only occurred in non-default configurations (prof_accum:false).
-  - Fix off-by-one backtracing issues (make sure that prof_alloc_prep() is
-    excluded from backtraces).
-  - Fix a prof-related bug in realloc() (only triggered by OOM errors).
-  - Fix prof-related bugs in allocm() and rallocm().
-  - Fix prof_tdata_cleanup() for --disable-tls builds.
-  - Fix a relative include path, to fix objdir builds.
-
-* 2.2.2 (July 30, 2011)
-
-  Bug fixes:
-  - Fix a build error for --disable-tcache.
-  - Fix assertions in arena_purge() (for real this time).
-  - Add the --with-private-namespace option.  This is a workaround for symbol
-    conflicts that can inadvertently arise when using static libraries.
-
-* 2.2.1 (March 30, 2011)
-
-  Bug fixes:
-  - Implement atomic operations for x86/x64.  This fixes compilation failures
-    for versions of gcc that are still in wide use.
-  - Fix an assertion in arena_purge().
-
-* 2.2.0 (March 22, 2011)
-
-  This version incorporates several improvements to algorithms and data
-  structures that tend to reduce fragmentation and increase speed.
-
-  New features:
-  - Add the "stats.cactive" mallctl.
-  - Update pprof (from google-perftools 1.7).
-  - Improve backtracing-related configuration logic, and add the
-    --disable-prof-libgcc option.
-
-  Bug fixes:
-  - Change default symbol visibility from "internal", to "hidden", which
-    decreases the overhead of library-internal function calls.
-  - Fix symbol visibility so that it is also set on OS X.
-  - Fix a build dependency regression caused by the introduction of the .pic.o
-    suffix for PIC object files.
-  - Add missing checks for mutex initialization failures.
-  - Don't use libgcc-based backtracing except on x64, where it is known to work.
-  - Fix deadlocks on OS X that were due to memory allocation in
-    pthread_mutex_lock().
-  - Heap profiling-specific fixes:
-    + Fix memory corruption due to integer overflow in small region index
-      computation, when using a small enough sample interval that profiling
-      context pointers are stored in small run headers.
-    + Fix a bootstrap ordering bug that only occurred with TLS disabled.
-    + Fix a rallocm() rsize bug.
-    + Fix error detection bugs for aligned memory allocation.
-
-* 2.1.3 (March 14, 2011)
-
-  Bug fixes:
-  - Fix a cpp logic regression (due to the "thread.{de,}allocatedp" mallctl fix
-    for OS X in 2.1.2).
-  - Fix a "thread.arena" mallctl bug.
-  - Fix a thread cache stats merging bug.
-
-* 2.1.2 (March 2, 2011)
-
-  Bug fixes:
-  - Fix "thread.{de,}allocatedp" mallctl for OS X.
-  - Add missing jemalloc.a to build system.
-
-* 2.1.1 (January 31, 2011)
-
-  Bug fixes:
-  - Fix aligned huge reallocation (affected allocm()).
-  - Fix the ALLOCM_LG_ALIGN macro definition.
-  - Fix a heap dumping deadlock.
-  - Fix a "thread.arena" mallctl bug.
-
-* 2.1.0 (December 3, 2010)
-
-  This version incorporates some optimizations that can't quite be considered
-  bug fixes.
-
-  New features:
-  - Use Linux's mremap(2) for huge object reallocation when possible.
-  - Avoid locking in mallctl*() when possible.
-  - Add the "thread.[de]allocatedp" mallctl's.
-  - Convert the manual page source from roff to DocBook, and generate both roff
-    and HTML manuals.
-
-  Bug fixes:
-  - Fix a crash due to incorrect bootstrap ordering.  This only impacted
-    --enable-debug --enable-dss configurations.
-  - Fix a minor statistics bug for mallctl("swap.avail", ...).
-
-* 2.0.1 (October 29, 2010)
-
-  Bug fixes:
-  - Fix a race condition in heap profiling that could cause undefined behavior
-    if "opt.prof_accum" were disabled.
-  - Add missing mutex unlocks for some OOM error paths in the heap profiling
-    code.
-  - Fix a compilation error for non-C99 builds.
-
-* 2.0.0 (October 24, 2010)
-
-  This version focuses on the experimental *allocm() API, and on improved
-  run-time configuration/introspection.  Nonetheless, numerous performance
-  improvements are also included.
-
-  New features:
-  - Implement the experimental {,r,s,d}allocm() API, which provides a superset
-    of the functionality available via malloc(), calloc(), posix_memalign(),
-    realloc(), malloc_usable_size(), and free().  These functions can be used to
-    allocate/reallocate aligned zeroed memory, ask for optional extra memory
-    during reallocation, prevent object movement during reallocation, etc.
-  - Replace JEMALLOC_OPTIONS/JEMALLOC_PROF_PREFIX with MALLOC_CONF, which is
-    more human-readable, and more flexible.  For example:
-      JEMALLOC_OPTIONS=AJP
-    is now:
-      MALLOC_CONF=abort:true,fill:true,stats_print:true
-  - Port to Apple OS X.  Sponsored by Mozilla.
-  - Make it possible for the application to control thread-->arena mappings via
-    the "thread.arena" mallctl.
-  - Add compile-time support for all TLS-related functionality via pthreads TSD.
-    This is mainly of interest for OS X, which does not support TLS, but has a
-    TSD implementation with similar performance.
-  - Override memalign() and valloc() if they are provided by the system.
-  - Add the "arenas.purge" mallctl, which can be used to synchronously purge all
-    dirty unused pages.
-  - Make cumulative heap profiling data optional, so that it is possible to
-    limit the amount of memory consumed by heap profiling data structures.
-  - Add per thread allocation counters that can be accessed via the
-    "thread.allocated" and "thread.deallocated" mallctls.
-
-  Incompatible changes:
-  - Remove JEMALLOC_OPTIONS and malloc_options (see MALLOC_CONF above).
-  - Increase default backtrace depth from 4 to 128 for heap profiling.
-  - Disable interval-based profile dumps by default.
-
-  Bug fixes:
-  - Remove bad assertions in fork handler functions.  These assertions could
-    cause aborts for some combinations of configure settings.
-  - Fix strerror_r() usage to deal with non-standard semantics in GNU libc.
-  - Fix leak context reporting.  This bug tended to cause the number of contexts
-    to be underreported (though the reported number of objects and bytes were
-    correct).
-  - Fix a realloc() bug for large in-place growing reallocation.  This bug could
-    cause memory corruption, but it was hard to trigger.
-  - Fix an allocation bug for small allocations that could be triggered if
-    multiple threads raced to create a new run of backing pages.
-  - Enhance the heap profiler to trigger samples based on usable size, rather
-    than request size.
-  - Fix a heap profiling bug due to sometimes losing track of requested object
-    size for sampled objects.
-
-* 1.0.3 (August 12, 2010)
-
-  Bug fixes:
-  - Fix the libunwind-based implementation of stack backtracing (used for heap
-    profiling).  This bug could cause zero-length backtraces to be reported.
-  - Add a missing mutex unlock in library initialization code.  If multiple
-    threads raced to initialize malloc, some of them could end up permanently
-    blocked.
-
-* 1.0.2 (May 11, 2010)
-
-  Bug fixes:
-  - Fix junk filling of large objects, which could cause memory corruption.
-  - Add MAP_NORESERVE support for chunk mapping, because otherwise virtual
-    memory limits could cause swap file configuration to fail.  Contributed by
-    Jordan DeLong.
-
-* 1.0.1 (April 14, 2010)
-
-  Bug fixes:
-  - Fix compilation when --enable-fill is specified.
-  - Fix threads-related profiling bugs that affected accuracy and caused memory
-    to be leaked during thread exit.
-  - Fix dirty page purging race conditions that could cause crashes.
-  - Fix crash in tcache flushing code during thread destruction.
-
-* 1.0.0 (April 11, 2010)
-
-  This release focuses on speed and run-time introspection.  Numerous
-  algorithmic improvements make this release substantially faster than its
-  predecessors.
-
-  New features:
-  - Implement autoconf-based configuration system.
-  - Add mallctl*(), for the purposes of introspection and run-time
-    configuration.
-  - Make it possible for the application to manually flush a thread's cache, via
-    the "tcache.flush" mallctl.
-  - Base maximum dirty page count on proportion of active memory.
-  - Compute various additional run-time statistics, including per size class
-    statistics for large objects.
-  - Expose malloc_stats_print(), which can be called repeatedly by the
-    application.
-  - Simplify the malloc_message() signature to only take one string argument,
-    and incorporate an opaque data pointer argument for use by the application
-    in combination with malloc_stats_print().
-  - Add support for allocation backed by one or more swap files, and allow the
-    application to disable over-commit if swap files are in use.
-  - Implement allocation profiling and leak checking.
-
-  Removed features:
-  - Remove the dynamic arena rebalancing code, since thread-specific caching
-    reduces its utility.
-
-  Bug fixes:
-  - Modify chunk allocation to work when address space layout randomization
-    (ASLR) is in use.
-  - Fix thread cleanup bugs related to TLS destruction.
-  - Handle 0-size allocation requests in posix_memalign().
-  - Fix a chunk leak.  The leaked chunks were never touched, so this impacted
-    virtual memory usage, but not physical memory usage.
-
-* linux_2008082[78]a (August 27/28, 2008)
-
-  These snapshot releases are the simple result of incorporating Linux-specific
-  support into the FreeBSD malloc sources.
-
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