1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/memory/jemalloc/src/ChangeLog Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,385 @@
1.4 +Following are change highlights associated with official releases. Important
1.5 +bug fixes are all mentioned, but internal enhancements are omitted here for
1.6 +brevity (even though they are more fun to write about). Much more detail can be
1.7 +found in the git revision history:
1.8 +
1.9 + http://www.canonware.com/cgi-bin/gitweb.cgi?p=jemalloc.git
1.10 + git://canonware.com/jemalloc.git
1.11 +
1.12 +* 3.x.x (Not yet released)
1.13 +
1.14 + Bug fixes:
1.15 + - Fix "arenas.extend" mallctl to output the number of arenas.
1.16 +
1.17 +* 3.2.0 (November 9, 2012)
1.18 +
1.19 + In addition to a couple of bug fixes, this version modifies page run
1.20 + allocation and dirty page purging algorithms in order to better control
1.21 + page-level virtual memory fragmentation.
1.22 +
1.23 + Incompatible changes:
1.24 + - Change the "opt.lg_dirty_mult" default from 5 to 3 (32:1 to 8:1).
1.25 +
1.26 + Bug fixes:
1.27 + - Fix dss/mmap allocation precedence code to use recyclable mmap memory only
1.28 + after primary dss allocation fails.
1.29 + - Fix deadlock in the "arenas.purge" mallctl. This regression was introduced
1.30 + in 3.1.0 by the addition of the "arena.<i>.purge" mallctl.
1.31 +
1.32 +* 3.1.0 (October 16, 2012)
1.33 +
1.34 + New features:
1.35 + - Auto-detect whether running inside Valgrind, thus removing the need to
1.36 + manually specify MALLOC_CONF=valgrind:true.
1.37 + - Add the "arenas.extend" mallctl, which allows applications to create
1.38 + manually managed arenas.
1.39 + - Add the ALLOCM_ARENA() flag for {,r,d}allocm().
1.40 + - Add the "opt.dss", "arena.<i>.dss", and "stats.arenas.<i>.dss" mallctls,
1.41 + which provide control over dss/mmap precedence.
1.42 + - Add the "arena.<i>.purge" mallctl, which obsoletes "arenas.purge".
1.43 + - Define LG_QUANTUM for hppa.
1.44 +
1.45 + Incompatible changes:
1.46 + - Disable tcache by default if running inside Valgrind, in order to avoid
1.47 + making unallocated objects appear reachable to Valgrind.
1.48 + - Drop const from malloc_usable_size() argument on Linux.
1.49 +
1.50 + Bug fixes:
1.51 + - Fix heap profiling crash if sampled object is freed via realloc(p, 0).
1.52 + - Remove const from __*_hook variable declarations, so that glibc can modify
1.53 + them during process forking.
1.54 + - Fix mlockall(2)/madvise(2) interaction.
1.55 + - Fix fork(2)-related deadlocks.
1.56 + - Fix error return value for "thread.tcache.enabled" mallctl.
1.57 +
1.58 +* 3.0.0 (May 11, 2012)
1.59 +
1.60 + Although this version adds some major new features, the primary focus is on
1.61 + internal code cleanup that facilitates maintainability and portability, most
1.62 + of which is not reflected in the ChangeLog. This is the first release to
1.63 + incorporate substantial contributions from numerous other developers, and the
1.64 + result is a more broadly useful allocator (see the git revision history for
1.65 + contribution details). Note that the license has been unified, thanks to
1.66 + Facebook granting a license under the same terms as the other copyright
1.67 + holders (see COPYING).
1.68 +
1.69 + New features:
1.70 + - Implement Valgrind support, redzones, and quarantine.
1.71 + - Add support for additional platforms:
1.72 + + FreeBSD
1.73 + + Mac OS X Lion
1.74 + + MinGW
1.75 + + Windows (no support yet for replacing the system malloc)
1.76 + - Add support for additional architectures:
1.77 + + MIPS
1.78 + + SH4
1.79 + + Tilera
1.80 + - Add support for cross compiling.
1.81 + - Add nallocm(), which rounds a request size up to the nearest size class
1.82 + without actually allocating.
1.83 + - Implement aligned_alloc() (blame C11).
1.84 + - Add the "thread.tcache.enabled" mallctl.
1.85 + - Add the "opt.prof_final" mallctl.
1.86 + - Update pprof (from gperftools 2.0).
1.87 + - Add the --with-mangling option.
1.88 + - Add the --disable-experimental option.
1.89 + - Add the --disable-munmap option, and make it the default on Linux.
1.90 + - Add the --enable-mremap option, which disables use of mremap(2) by default.
1.91 +
1.92 + Incompatible changes:
1.93 + - Enable stats by default.
1.94 + - Enable fill by default.
1.95 + - Disable lazy locking by default.
1.96 + - Rename the "tcache.flush" mallctl to "thread.tcache.flush".
1.97 + - Rename the "arenas.pagesize" mallctl to "arenas.page".
1.98 + - Change the "opt.lg_prof_sample" default from 0 to 19 (1 B to 512 KiB).
1.99 + - Change the "opt.prof_accum" default from true to false.
1.100 +
1.101 + Removed features:
1.102 + - Remove the swap feature, including the "config.swap", "swap.avail",
1.103 + "swap.prezeroed", "swap.nfds", and "swap.fds" mallctls.
1.104 + - Remove highruns statistics, including the
1.105 + "stats.arenas.<i>.bins.<j>.highruns" and
1.106 + "stats.arenas.<i>.lruns.<j>.highruns" mallctls.
1.107 + - As part of small size class refactoring, remove the "opt.lg_[qc]space_max",
1.108 + "arenas.cacheline", "arenas.subpage", "arenas.[tqcs]space_{min,max}", and
1.109 + "arenas.[tqcs]bins" mallctls.
1.110 + - Remove the "arenas.chunksize" mallctl.
1.111 + - Remove the "opt.lg_prof_tcmax" option.
1.112 + - Remove the "opt.lg_prof_bt_max" option.
1.113 + - Remove the "opt.lg_tcache_gc_sweep" option.
1.114 + - Remove the --disable-tiny option, including the "config.tiny" mallctl.
1.115 + - Remove the --enable-dynamic-page-shift configure option.
1.116 + - Remove the --enable-sysv configure option.
1.117 +
1.118 + Bug fixes:
1.119 + - Fix a statistics-related bug in the "thread.arena" mallctl that could cause
1.120 + invalid statistics and crashes.
1.121 + - Work around TLS deallocation via free() on Linux. This bug could cause
1.122 + write-after-free memory corruption.
1.123 + - Fix a potential deadlock that could occur during interval- and
1.124 + growth-triggered heap profile dumps.
1.125 + - Fix large calloc() zeroing bugs due to dropping chunk map unzeroed flags.
1.126 + - Fix chunk_alloc_dss() to stop claiming memory is zeroed. This bug could
1.127 + cause memory corruption and crashes with --enable-dss specified.
1.128 + - Fix fork-related bugs that could cause deadlock in children between fork
1.129 + and exec.
1.130 + - Fix malloc_stats_print() to honor 'b' and 'l' in the opts parameter.
1.131 + - Fix realloc(p, 0) to act like free(p).
1.132 + - Do not enforce minimum alignment in memalign().
1.133 + - Check for NULL pointer in malloc_usable_size().
1.134 + - Fix an off-by-one heap profile statistics bug that could be observed in
1.135 + interval- and growth-triggered heap profiles.
1.136 + - Fix the "epoch" mallctl to update cached stats even if the passed in epoch
1.137 + is 0.
1.138 + - Fix bin->runcur management to fix a layout policy bug. This bug did not
1.139 + affect correctness.
1.140 + - Fix a bug in choose_arena_hard() that potentially caused more arenas to be
1.141 + initialized than necessary.
1.142 + - Add missing "opt.lg_tcache_max" mallctl implementation.
1.143 + - Use glibc allocator hooks to make mixed allocator usage less likely.
1.144 + - Fix build issues for --disable-tcache.
1.145 + - Don't mangle pthread_create() when --with-private-namespace is specified.
1.146 +
1.147 +* 2.2.5 (November 14, 2011)
1.148 +
1.149 + Bug fixes:
1.150 + - Fix huge_ralloc() race when using mremap(2). This is a serious bug that
1.151 + could cause memory corruption and/or crashes.
1.152 + - Fix huge_ralloc() to maintain chunk statistics.
1.153 + - Fix malloc_stats_print(..., "a") output.
1.154 +
1.155 +* 2.2.4 (November 5, 2011)
1.156 +
1.157 + Bug fixes:
1.158 + - Initialize arenas_tsd before using it. This bug existed for 2.2.[0-3], as
1.159 + well as for --disable-tls builds in earlier releases.
1.160 + - Do not assume a 4 KiB page size in test/rallocm.c.
1.161 +
1.162 +* 2.2.3 (August 31, 2011)
1.163 +
1.164 + This version fixes numerous bugs related to heap profiling.
1.165 +
1.166 + Bug fixes:
1.167 + - Fix a prof-related race condition. This bug could cause memory corruption,
1.168 + but only occurred in non-default configurations (prof_accum:false).
1.169 + - Fix off-by-one backtracing issues (make sure that prof_alloc_prep() is
1.170 + excluded from backtraces).
1.171 + - Fix a prof-related bug in realloc() (only triggered by OOM errors).
1.172 + - Fix prof-related bugs in allocm() and rallocm().
1.173 + - Fix prof_tdata_cleanup() for --disable-tls builds.
1.174 + - Fix a relative include path, to fix objdir builds.
1.175 +
1.176 +* 2.2.2 (July 30, 2011)
1.177 +
1.178 + Bug fixes:
1.179 + - Fix a build error for --disable-tcache.
1.180 + - Fix assertions in arena_purge() (for real this time).
1.181 + - Add the --with-private-namespace option. This is a workaround for symbol
1.182 + conflicts that can inadvertently arise when using static libraries.
1.183 +
1.184 +* 2.2.1 (March 30, 2011)
1.185 +
1.186 + Bug fixes:
1.187 + - Implement atomic operations for x86/x64. This fixes compilation failures
1.188 + for versions of gcc that are still in wide use.
1.189 + - Fix an assertion in arena_purge().
1.190 +
1.191 +* 2.2.0 (March 22, 2011)
1.192 +
1.193 + This version incorporates several improvements to algorithms and data
1.194 + structures that tend to reduce fragmentation and increase speed.
1.195 +
1.196 + New features:
1.197 + - Add the "stats.cactive" mallctl.
1.198 + - Update pprof (from google-perftools 1.7).
1.199 + - Improve backtracing-related configuration logic, and add the
1.200 + --disable-prof-libgcc option.
1.201 +
1.202 + Bug fixes:
1.203 + - Change default symbol visibility from "internal", to "hidden", which
1.204 + decreases the overhead of library-internal function calls.
1.205 + - Fix symbol visibility so that it is also set on OS X.
1.206 + - Fix a build dependency regression caused by the introduction of the .pic.o
1.207 + suffix for PIC object files.
1.208 + - Add missing checks for mutex initialization failures.
1.209 + - Don't use libgcc-based backtracing except on x64, where it is known to work.
1.210 + - Fix deadlocks on OS X that were due to memory allocation in
1.211 + pthread_mutex_lock().
1.212 + - Heap profiling-specific fixes:
1.213 + + Fix memory corruption due to integer overflow in small region index
1.214 + computation, when using a small enough sample interval that profiling
1.215 + context pointers are stored in small run headers.
1.216 + + Fix a bootstrap ordering bug that only occurred with TLS disabled.
1.217 + + Fix a rallocm() rsize bug.
1.218 + + Fix error detection bugs for aligned memory allocation.
1.219 +
1.220 +* 2.1.3 (March 14, 2011)
1.221 +
1.222 + Bug fixes:
1.223 + - Fix a cpp logic regression (due to the "thread.{de,}allocatedp" mallctl fix
1.224 + for OS X in 2.1.2).
1.225 + - Fix a "thread.arena" mallctl bug.
1.226 + - Fix a thread cache stats merging bug.
1.227 +
1.228 +* 2.1.2 (March 2, 2011)
1.229 +
1.230 + Bug fixes:
1.231 + - Fix "thread.{de,}allocatedp" mallctl for OS X.
1.232 + - Add missing jemalloc.a to build system.
1.233 +
1.234 +* 2.1.1 (January 31, 2011)
1.235 +
1.236 + Bug fixes:
1.237 + - Fix aligned huge reallocation (affected allocm()).
1.238 + - Fix the ALLOCM_LG_ALIGN macro definition.
1.239 + - Fix a heap dumping deadlock.
1.240 + - Fix a "thread.arena" mallctl bug.
1.241 +
1.242 +* 2.1.0 (December 3, 2010)
1.243 +
1.244 + This version incorporates some optimizations that can't quite be considered
1.245 + bug fixes.
1.246 +
1.247 + New features:
1.248 + - Use Linux's mremap(2) for huge object reallocation when possible.
1.249 + - Avoid locking in mallctl*() when possible.
1.250 + - Add the "thread.[de]allocatedp" mallctl's.
1.251 + - Convert the manual page source from roff to DocBook, and generate both roff
1.252 + and HTML manuals.
1.253 +
1.254 + Bug fixes:
1.255 + - Fix a crash due to incorrect bootstrap ordering. This only impacted
1.256 + --enable-debug --enable-dss configurations.
1.257 + - Fix a minor statistics bug for mallctl("swap.avail", ...).
1.258 +
1.259 +* 2.0.1 (October 29, 2010)
1.260 +
1.261 + Bug fixes:
1.262 + - Fix a race condition in heap profiling that could cause undefined behavior
1.263 + if "opt.prof_accum" were disabled.
1.264 + - Add missing mutex unlocks for some OOM error paths in the heap profiling
1.265 + code.
1.266 + - Fix a compilation error for non-C99 builds.
1.267 +
1.268 +* 2.0.0 (October 24, 2010)
1.269 +
1.270 + This version focuses on the experimental *allocm() API, and on improved
1.271 + run-time configuration/introspection. Nonetheless, numerous performance
1.272 + improvements are also included.
1.273 +
1.274 + New features:
1.275 + - Implement the experimental {,r,s,d}allocm() API, which provides a superset
1.276 + of the functionality available via malloc(), calloc(), posix_memalign(),
1.277 + realloc(), malloc_usable_size(), and free(). These functions can be used to
1.278 + allocate/reallocate aligned zeroed memory, ask for optional extra memory
1.279 + during reallocation, prevent object movement during reallocation, etc.
1.280 + - Replace JEMALLOC_OPTIONS/JEMALLOC_PROF_PREFIX with MALLOC_CONF, which is
1.281 + more human-readable, and more flexible. For example:
1.282 + JEMALLOC_OPTIONS=AJP
1.283 + is now:
1.284 + MALLOC_CONF=abort:true,fill:true,stats_print:true
1.285 + - Port to Apple OS X. Sponsored by Mozilla.
1.286 + - Make it possible for the application to control thread-->arena mappings via
1.287 + the "thread.arena" mallctl.
1.288 + - Add compile-time support for all TLS-related functionality via pthreads TSD.
1.289 + This is mainly of interest for OS X, which does not support TLS, but has a
1.290 + TSD implementation with similar performance.
1.291 + - Override memalign() and valloc() if they are provided by the system.
1.292 + - Add the "arenas.purge" mallctl, which can be used to synchronously purge all
1.293 + dirty unused pages.
1.294 + - Make cumulative heap profiling data optional, so that it is possible to
1.295 + limit the amount of memory consumed by heap profiling data structures.
1.296 + - Add per thread allocation counters that can be accessed via the
1.297 + "thread.allocated" and "thread.deallocated" mallctls.
1.298 +
1.299 + Incompatible changes:
1.300 + - Remove JEMALLOC_OPTIONS and malloc_options (see MALLOC_CONF above).
1.301 + - Increase default backtrace depth from 4 to 128 for heap profiling.
1.302 + - Disable interval-based profile dumps by default.
1.303 +
1.304 + Bug fixes:
1.305 + - Remove bad assertions in fork handler functions. These assertions could
1.306 + cause aborts for some combinations of configure settings.
1.307 + - Fix strerror_r() usage to deal with non-standard semantics in GNU libc.
1.308 + - Fix leak context reporting. This bug tended to cause the number of contexts
1.309 + to be underreported (though the reported number of objects and bytes were
1.310 + correct).
1.311 + - Fix a realloc() bug for large in-place growing reallocation. This bug could
1.312 + cause memory corruption, but it was hard to trigger.
1.313 + - Fix an allocation bug for small allocations that could be triggered if
1.314 + multiple threads raced to create a new run of backing pages.
1.315 + - Enhance the heap profiler to trigger samples based on usable size, rather
1.316 + than request size.
1.317 + - Fix a heap profiling bug due to sometimes losing track of requested object
1.318 + size for sampled objects.
1.319 +
1.320 +* 1.0.3 (August 12, 2010)
1.321 +
1.322 + Bug fixes:
1.323 + - Fix the libunwind-based implementation of stack backtracing (used for heap
1.324 + profiling). This bug could cause zero-length backtraces to be reported.
1.325 + - Add a missing mutex unlock in library initialization code. If multiple
1.326 + threads raced to initialize malloc, some of them could end up permanently
1.327 + blocked.
1.328 +
1.329 +* 1.0.2 (May 11, 2010)
1.330 +
1.331 + Bug fixes:
1.332 + - Fix junk filling of large objects, which could cause memory corruption.
1.333 + - Add MAP_NORESERVE support for chunk mapping, because otherwise virtual
1.334 + memory limits could cause swap file configuration to fail. Contributed by
1.335 + Jordan DeLong.
1.336 +
1.337 +* 1.0.1 (April 14, 2010)
1.338 +
1.339 + Bug fixes:
1.340 + - Fix compilation when --enable-fill is specified.
1.341 + - Fix threads-related profiling bugs that affected accuracy and caused memory
1.342 + to be leaked during thread exit.
1.343 + - Fix dirty page purging race conditions that could cause crashes.
1.344 + - Fix crash in tcache flushing code during thread destruction.
1.345 +
1.346 +* 1.0.0 (April 11, 2010)
1.347 +
1.348 + This release focuses on speed and run-time introspection. Numerous
1.349 + algorithmic improvements make this release substantially faster than its
1.350 + predecessors.
1.351 +
1.352 + New features:
1.353 + - Implement autoconf-based configuration system.
1.354 + - Add mallctl*(), for the purposes of introspection and run-time
1.355 + configuration.
1.356 + - Make it possible for the application to manually flush a thread's cache, via
1.357 + the "tcache.flush" mallctl.
1.358 + - Base maximum dirty page count on proportion of active memory.
1.359 + - Compute various addtional run-time statistics, including per size class
1.360 + statistics for large objects.
1.361 + - Expose malloc_stats_print(), which can be called repeatedly by the
1.362 + application.
1.363 + - Simplify the malloc_message() signature to only take one string argument,
1.364 + and incorporate an opaque data pointer argument for use by the application
1.365 + in combination with malloc_stats_print().
1.366 + - Add support for allocation backed by one or more swap files, and allow the
1.367 + application to disable over-commit if swap files are in use.
1.368 + - Implement allocation profiling and leak checking.
1.369 +
1.370 + Removed features:
1.371 + - Remove the dynamic arena rebalancing code, since thread-specific caching
1.372 + reduces its utility.
1.373 +
1.374 + Bug fixes:
1.375 + - Modify chunk allocation to work when address space layout randomization
1.376 + (ASLR) is in use.
1.377 + - Fix thread cleanup bugs related to TLS destruction.
1.378 + - Handle 0-size allocation requests in posix_memalign().
1.379 + - Fix a chunk leak. The leaked chunks were never touched, so this impacted
1.380 + virtual memory usage, but not physical memory usage.
1.381 +
1.382 +* linux_2008082[78]a (August 27/28, 2008)
1.383 +
1.384 + These snapshot releases are the simple result of incorporating Linux-specific
1.385 + support into the FreeBSD malloc sources.
1.386 +
1.387 +--------------------------------------------------------------------------------
1.388 +vim:filetype=text:textwidth=80
