jemalloc: Import 5.3.0 54eaed1d8b56b1aa528be3bdd1877e59c56fa90c

Import jemalloc 5.3.0.

This import changes how manage the jemalloc vendor branch (which was
just started anyway). Starting with 5.3.0, we import a clean tree from
the upstream github, removing all the old files that are no longer
upstream, or that we've kept around for some reason. We do this because
we merge from this raw version of jemalloc into the FreeBSD
contrib/jemalloc, then we run autogen stuff, generate all the generated
.h files with gmake, then finally remove much of the generated files in
contrib/jemalloc using an update script.

Sponsored by:		Netflix

Author: bsdimp

ChangeLog

@@ -4,6 +4,106 @@ brevity.  Much more detail can be found in the git revision history:
 
     https://github.com/jemalloc/jemalloc
 
+* 5.3.0 (May 6, 2022)
+
+  This release contains many speed and space optimizations, from micro
+  optimizations on common paths to rework of internal data structures and
+  locking schemes, and many more too detailed to list below.  Multiple percent
+  of system level metric improvements were measured in tested production
+  workloads.  The release has gone through large-scale production testing.
+
+  New features:
+  - Add the thread.idle mallctl which hints that the calling thread will be
+    idle for a nontrivial period of time.  (@davidtgoldblatt)
+  - Allow small size classes to be the maximum size class to cache in the
+    thread-specific cache, through the opt.[lg_]tcache_max option.  (@interwq,
+    @jordalgo)
+  - Make the behavior of realloc(ptr, 0) configurable with opt.zero_realloc.
+    (@davidtgoldblatt)
+  - Add 'make uninstall' support.  (@sangshuduo, @Lapenkov)
+  - Support C++17 over-aligned allocation.  (@marksantaniello)
+  - Add the thread.peak mallctl for approximate per-thread peak memory tracking.
+    (@davidtgoldblatt)
+  - Add interval-based stats output opt.stats_interval.  (@interwq)
+  - Add prof.prefix to override filename prefixes for dumps.  (@zhxchen17)
+  - Add high resolution timestamp support for profiling.  (@tyroguru)
+  - Add the --collapsed flag to jeprof for flamegraph generation.
+    (@igorwwwwwwwwwwwwwwwwwwww)
+  - Add the --debug-syms-by-id option to jeprof for debug symbols discovery.
+    (@DeannaGelbart)
+  - Add the opt.prof_leak_error option to exit with error code when leak is
+    detected using opt.prof_final.  (@yunxuo)
+  - Add opt.cache_oblivious as an runtime alternative to config.cache_oblivious.
+    (@interwq)
+  - Add mallctl interfaces:
+    + opt.zero_realloc  (@davidtgoldblatt)
+    + opt.cache_oblivious  (@interwq)
+    + opt.prof_leak_error  (@yunxuo)
+    + opt.stats_interval  (@interwq)
+    + opt.stats_interval_opts  (@interwq)
+    + opt.tcache_max  (@interwq)
+    + opt.trust_madvise  (@azat)
+    + prof.prefix  (@zhxchen17)
+    + stats.zero_reallocs  (@davidtgoldblatt)
+    + thread.idle  (@davidtgoldblatt)
+    + thread.peak.{read,reset}  (@davidtgoldblatt)
+
+  Bug fixes:
+  - Fix the synchronization around explicit tcache creation which could cause
+    invalid tcache identifiers.  This regression was first released in 5.0.0.
+    (@yoshinorim, @davidtgoldblatt)
+  - Fix a profiling biasing issue which could cause incorrect heap usage and
+    object counts.  This issue existed in all previous releases with the heap
+    profiling feature.  (@davidtgoldblatt)
+  - Fix the order of stats counter updating on large realloc which could cause
+    failed assertions.  This regression was first released in 5.0.0.  (@azat)
+  - Fix the locking on the arena destroy mallctl, which could cause concurrent
+    arena creations to fail.  This functionality was first introduced in 5.0.0.
+    (@interwq)
+
+  Portability improvements:
+  - Remove nothrow from system function declarations on macOS and FreeBSD.
+    (@davidtgoldblatt, @fredemmott, @leres)
+  - Improve overcommit and page alignment settings on NetBSD.  (@zoulasc)
+  - Improve CPU affinity support on BSD platforms.  (@devnexen)
+  - Improve utrace detection and support.  (@devnexen)
+  - Improve QEMU support with MADV_DONTNEED zeroed pages detection.  (@azat)
+  - Add memcntl support on Solaris / illumos.  (@devnexen)
+  - Improve CPU_SPINWAIT on ARM.  (@AWSjswinney)
+  - Improve TSD cleanup on FreeBSD.  (@Lapenkov)
+  - Disable percpu_arena if the CPU count cannot be reliably detected.  (@azat)
+  - Add malloc_size(3) override support.  (@devnexen)
+  - Add mmap VM_MAKE_TAG support.  (@devnexen)
+  - Add support for MADV_[NO]CORE.  (@devnexen)
+  - Add support for DragonFlyBSD.  (@devnexen)
+  - Fix the QUANTUM setting on MIPS64.  (@brooksdavis)
+  - Add the QUANTUM setting for ARC.  (@vineetgarc)
+  - Add the QUANTUM setting for LoongArch.  (@wangjl-uos)
+  - Add QNX support.  (@jqian-aurora)
+  - Avoid atexit(3) calls unless the relevant profiling features are enabled.
+    (@BusyJay, @laiwei-rice, @interwq)
+  - Fix unknown option detection when using Clang.  (@Lapenkov)
+  - Fix symbol conflict with musl libc.  (@georgthegreat)
+  - Add -Wimplicit-fallthrough checks.  (@nickdesaulniers)
+  - Add __forceinline support on MSVC.  (@santagada)
+  - Improve FreeBSD and Windows CI support.  (@Lapenkov)
+  - Add CI support for PPC64LE architecture.  (@ezeeyahoo)
+
+  Incompatible changes:
+  - Maximum size class allowed in tcache (opt.[lg_]tcache_max) now has an upper
+    bound of 8MiB.  (@interwq)
+
+  Optimizations and refactors (@davidtgoldblatt, @Lapenkov, @interwq):
+  - Optimize the common cases of the thread cache operations.
+  - Optimize internal data structures, including RB tree and pairing heap.
+  - Optimize the internal locking on extent management.
+  - Extract and refactor the internal page allocator and interface modules.
+
+  Documentation:
+  - Fix doc build with --with-install-suffix.  (@lawmurray, @interwq)
+  - Add PROFILING_INTERNALS.md.  (@davidtgoldblatt)
+  - Ensure the proper order of doc building and installation.  (@Mingli-Yu)
+
 * 5.2.1 (August 5, 2019)
 
   This release is primarily about Windows.  A critical virtual memory leak is

INSTALL.md

@@ -9,14 +9,17 @@ If building from unpackaged developer sources, the simplest command sequence
 that might work is:
 
     ./autogen.sh
-    make dist
     make
     make install
 
-Note that documentation is not built by the default target because doing so
-would create a dependency on xsltproc in packaged releases, hence the
-requirement to either run 'make dist' or avoid installing docs via the various
-install_* targets documented below.
+You can uninstall the installed build artifacts like this:
+
+    make uninstall
+
+Notes:
+ - "autoconf" needs to be installed
+ - Documentation is built by the default target only when xsltproc is
+available.  Build will warn but not stop if the dependency is missing.
 
 
 ## Advanced configuration
@@ -188,13 +191,13 @@ any of the following arguments (not a definitive list) to 'configure':
 
 * `--disable-cache-oblivious`
 
-    Disable cache-oblivious large allocation alignment for large allocation
-    requests with no alignment constraints.  If this feature is disabled, all
-    large allocations are page-aligned as an implementation artifact, which can
-    severely harm CPU cache utilization.  However, the cache-oblivious layout
-    comes at the cost of one extra page per large allocation, which in the
-    most extreme case increases physical memory usage for the 16 KiB size class
-    to 20 KiB.
+    Disable cache-oblivious large allocation alignment by default, for large
+    allocation requests with no alignment constraints.  If this feature is
+    disabled, all large allocations are page-aligned as an implementation
+    artifact, which can severely harm CPU cache utilization.  However, the
+    cache-oblivious layout comes at the cost of one extra page per large
+    allocation, which in the most extreme case increases physical memory usage
+    for the 16 KiB size class to 20 KiB.
 
 * `--disable-syscall`