MoarVM - A VM for NQP and Rakudo Perl 6

2020.02

[ca2a4c4c5] Resolve hostnames given a socket type, protocol, and passivity
[d606d9112,b1ff3d826,cf44a3686,cf44a3686,7920f2cc4,cfecd54bd,82f2719ce,e9a63e03f,296bedfa6, 3bbab8c4b,f56248139,5a2f4ed47,056c523db,192f0433c] Switch our libtommath to upstream's 1.2.0
[17935040a,1fbbb9335,a51428429,7877b0376,e67022405,10f98288c,f32b383cc,76d34faf1,d9c087f36] Handle return values from libtommath functions
[1d80b6038] Fixes for MVM_bigint_pow
[dfdaf19a8] Use right size+sign in comparison in MVM_bigint_rand
[9709537d9] Serialize the names of closures
[f47f53110] Update libuv to version 1.34.2
[0814ab4d8] Negative numbers should not be prime
[2296bcaed] New libtommath that builds bn_mp_set_double.c...
[f7a3a5ccd] Implement --git-cache-dir Configure.pl option
[4d7c7e142] Clear callsite of bottom frame when uninlining
[657b536cf,2cc4d3027] Update dyncall submodule
[978480b28] Mark cmp_tc static to avoid linker errors
[a71eee4c2] Allow closing handle bound to async proc stdin
[dd20883c3] Align MVM_args_get_required_pos_num with what the JIT actually expects

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2020.01.1

[105d09d62] Fix NativeCall libraries losing state during repossession
[7b8ed6308,a3ec7f315,921c8de84,9d053b8e9,8ac8afcc2,611532317,0995f19b9,fce208cb1,72941ee22, 9166ea591,61ac671ea] Fix several more compiler warnings

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2020.01

[d7b6855d3,7a93b2897,fc41473c0,3806735a4,ae66545c7,34537cfd0,4bf923dbd,596a0b287] Fix segfault caused by deopt all in NativeCall callback
[610e05fa0,c799de421,357adb45b,eb13ccad1,2ac1fa27f,ff1e55617] Fix relocatability of modules using NativeCall
[0e0f5bf6d] Allow getting absolute epoch startup time of VM in vmeventsubscribe
[9442b1a7c] Add support for '−' (U+2212) minus for nqp::radix(_I)
[cd64bf94c,0074094c2] Clean up MVM_io_resolve_host_name and make it more portable
[e35bd5f0e] Fix segfaults caused by JITed takehandlerresult returning NULL
[e94893f89] Fix frame walker segfaults caused by deopt of a caller on a different thread
[8f2d0d781] Detect files that cannot be synched also on MacOS
[be5f206c8] Remove bogus debug assertion in the GC's process_worklist
[4924390c7,eb3d981d7,47892d379,3c2a933b5,1de3c40c0,5464dd47c,e556879ad,1f31143e7,31a1b22c6, 631d361c6,795b320b0,bed44f1d5,3d2f8d739,21f9c3284,133b34c03,26c9750c4,7f486360b,70a768c14, 487f39577,d0d99f85c,153771bc1,03833e369,f26a1783c,758ef58b0,d81e9218f,1e731b6f9,f35e1d8c5, 91e3530ac,cac9b9a9d,4ce5570e2,d91f86ba8,de1bebc72,8ac4ac2cf,13b618c25,f59f8f5de,20804df5b, 14f581683,a335add83,ef7d0ecf4,8a9444b11,d4f20a191,61205646b,4f4c304ba,a06a0edf3,29acd43f0, 0150c1d82,9a59fdc9a,b6327c603,a0d545b13,85f5604e7,5d5b86e30,9bce55092,9ba1c25a5,4bdc7638c, 119a3f847,163da25a8,412c5db96,6953ca60e,c68ed2b03,a566f53f8,a173cc0a2,6ddcc0bb3,21215b756, 740ac6e02,0a80653b5,0f9013a91,9ee85e7c5,caaf83db6,ca6012a68,af34daa42,8d0b50d3f,97615be0a, 1b2f72e5e] Move to C99, compile with -Wall -Wextra and fix preexisting compiler warnings
[ccfc14fcb] Fix function pointer return values treated like uchar when using libffi
[23daabadc] Fix memory corruption after cancelling signal
[836396c74] Jit ordbaseat
[f10a31b43,a26d7fff8] [JIT] Add missing breaks

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2019.11

6model:

[8a5cc88a,af76729d] Fix incorrect conditional in deserialize_context
[59fa3b82] Fix for run-away CORE context on closures
[1b0950e3] Give higher layers a way to check if a nativecall site is set up
[47cd6c66] Fix the CStr REPR's copy_to function
[d52282b2] Fix possible deadlock in finish_parameterizing
[fd2659ed] Fix possible access to fromspace in code_pair_configure_container_spec
[366a7b7a] Add missing write barrier to MVM_6model_get_how
[a4a599e3] Fix possible access to fromspace in MVM_code_location
[0864cb76] Don't crash with read-int/write-int on unsupported reprs
[177706fe] Better error message for P6opaque in multidim functions
[b7151da7,d76ebbe4] Fix possible memory corruption in CStruct's, CPPStruct's and CUnion's get_attribute
[289ccd8c] Don't segfault when trying to get the debug name of a NULL object
[1a973a37] Add elem count in ConcBlockingQueue to telemetry log
[4a90335f] Fix possible access to fromspace in CStruct's get_attribute
[39a4f05f] Fix possible segfaults related to corrupted CPPStruct STables
[23fd0449] Fix CStruct's compute_allocation_strategy leaving the allocate_in_gen2 flag on by accident
[ca9d44f2] Fix possible access to fromspace in MVM_repr_dimensions
[0a12e3c4] Fix ConcBlockingQueue possibly unshifting an outdated item pointer

Core:

[a5d553cd] Add missing concreteness checks to most array ops
[95f69be8] Implement serialization of NativeCall reprs with dyncall
[efeec455] Dynamic library loading works with unicody paths on Windows
[e0e3ea9f,fa2e4f21,fa2e4f21,01f85c8b,ddf5b56b] Add more context to error messages
[55b6f734] Make sure autobox on return and slurpy nameds uses int cache
[e9e0731a] Make sure intcache type is rooted
[9138c699] Fix possible access to fromspace in MVM_frame_move_to_heap
[3f97d73d] Fix a subtle bug in instrument_graph
[8622835b] Fix possible memory corruption in MVM_frame_capture_*
[90252a8f] Fix possible access to fromspace in MVM_args_set_result_(obj|str)
[1fd0fdcd] Fix stack simulation losing track in some cases
[cfc5d000] Give error message improvement to libffi as well
[703fd647] Fix a nativecall error message in dyncall
[3e715b42] NativeCall: output index of argument with repr mismatch (#1141)
[e2f57637] Fix bogus "Decoder may not be used concurrently" after exceptions
[00a1ddb9] Fix GC processing uninitialized data in autoclosing of frames
[2dbf6225] Fix comp units using obsolete pointers to their filename
[e0bc6e2f] Fix slurpy arg handling possibly accessing an outdated arg context
[64a6f69c] Fix possible invalid memory access when throwing exceptions
[4ab1d425] Fix autobox possibly writing to an outdated target

Debug Server:

[85ce8ecc] Better error if getaddrinfo in debugserver fails
[b1bb9349] Prepend "Debugserver:" to errors/output originating from the debugserver

Docs:

[56fa7a0c] Improve naming in documentation
[1eeae85f] Document heapsnapshot format version 3.1
[ee18678e] Update "Features" part of readme

GC:

[b0b3fc8c] Fix obscure deadlock in run_gc
[329f669c,ea9b29e8] Fix race condition with exited threads still in the thread list
[bcc785d2] Fix overflow objects still belonging to exiting thread
[aa2270c7] Fix overflow objects getting freed prematurely on thread exit
[68666832] Fix segfaults in GCDEBUG_LOGs
[539f1d03] Fix possible access to fromspace in finalize_handler_caller
[fdc5eacf] VMEvent: put gc_promoted_bytes_since_last_full in GCEvent
[aa934648] Fix swapped parameters in call to profiler_log_gen2_roots
[1850b6c5] GCEvent shall report gen2root count from all TCs
[6f72c92f] VMEvent: divide timing numbers by 1000
[3faf1985] Introduce vmevent, "VM Event Subscription"
[24e2986a] Do heapsnapshot/instrumented data gathering earlier in GC
[7e190207] Log GC start a little later to fix profiling
[35101eb8] New GC debug level (3) triggers the GC on each mem allocation

IO:

[acd1156b] Use more appropriate flags with getaddrinfo
[16485506] Fix format strings in calls to MVM_exception_throw_adhoc
[36c35db1] Make MVM_file_is_rwx honor root and groups
[379ec77a,d9a067d4,2f4798b8,3fa99b4d,2f4798b8,...] IP6NS Grant: Improve hostname resolution
[5dfed008] Fix possible SEGV in async_spawn_on_exit
[6926a492] Fixed file permission interpretation problems around groups
[241be06b] Fix possible access to fromspace in MVM_dir_open
[2c9a92e9] Add a missing gc root for asyncsocket listen setup
[9c896d6c] Add gc pressure for process output read ops
[606c4437] Fix possible access to fromspace in UDP socket setup
[57a6d475] Add a missing gc root for asyncsocket listen setup
[bf3c6a97] Fix warning about directive in format string
[93739d56] Improve error when failing to spawn process

JIT:

[d5f5185b] We should not overwrite assigned type
[97e26c01] Fix bug in takedispatcher
[e594fbcb] Add missing cast to sp_p6oget_bi
[f8eca66b] Fix exprjit sp_p6oget_bi
[17475350] Syntactically distinguish let keyword variants
[27dcb378] Implement exprjit of sp_bind_o
[2ac137c3] Use the new deopt index for synthetic guards
[e4a756c6] Deoptimization in the expression JIT
[f8b05151] Use correct deopt index for guard opcodes
[d79e7d5a] Revert template compiler back to v5.10
[10404ee5] Jit the log, exp and ceil ops
[7f828342] Handle NaN in FP branching comparisons
[6c622553] Fix floating point comparisons
[7f8061a5] Support floating point comparisons
[27e9f979] Functions that return floating point values
[fb75f9a6] Compile with numeric function argument
[09c0df4f] A few more numeric tiles
[4002c19b] Make jit-dump.pl useful again
[d79c8306] Use the correct registers for numeric tiles
[cebb89ce] Basic floating point templates and tiles
[c9aebedb] Handle floating point registers better
[a62a2ff2] Spill live range compatible with requested set
[6b00c2b3] Live ranges are given register set
[4d65e467] Support floating point registers in load, spill and copy
[87710a12] Floating point support in the register allocator
[821e8535] Make STORE polymorphic on input
[3069ed4b] More rigorous type checking
[05297fa6] Split type check from expr type resolution
[0f33b570] Basic expression support for floating point operators
[c3af0d66] Try to select the first input register as output register
[b58bbf0f] Enfore input/output registers better
[9d34cb64] Enforce output-operand form in register allocator
[43138989] Minor debugging / structure improvements
[ed1ed12b] Reorganize JIT register definitions
[cfd81276] Parse oplist operands
[4407f68a] Move JIT-compile support libs to tools/lib
[e5076fc5] Autogenerate tile predeclarations
[b49fa493] Use bitmap for free register set
[9c969b1b] Add missing write barrier to lego JIT implementation of setcodeobj
[f0978d6a] Jit getuniprop_(int|bool|str)
[e5321a36] Jit captureposarg_n
[9f679f32] Jit and add a template for smrt_intify

Libraries:

[0f05efbb] Update to libuv version 1.33.0
[d24f6952] Use updated dyncall library with "execstack" fix
[eed5fe14] [DynASM] Take in REX encoding fix

Math:

[c390b30c] Fix possible access to fromspace in MVM_coerce_sI
[a001b7e4] Fix many memory corruption issues in bigint operations

Ops:

[d189b29b] Make socket family handling portable

Other:

[bb239a91] Fix MVMSpeshPluginState type defined twice
[5f177f58] Make MVM_HASH_RANDOMIZE properly control hash rand
[ff4f6031] Factor out run_deserialization_frame() to avoid code repetition
[b26638eb] Add MVM_vm_run_bytecode() as alternative to MVM_vm_run_file()
[1a8988c0] Add "use 5.020" to expr-template-compiler.pl
[7d23bd26] update_ops.p6: properly deeply clone spans data
[e4b87265] Add reference to roast Unicode update instructions

Platform:

[87d7f58d] Deduplicate and shorten open and fopen wrappers
[e127b849] Improve Unicode handling with paths
[9d6f4493] Fix possible access to fromspace in MVM_platfrom_uname

Profiler:

[0b531f9c] Implement the MVM_CONFPROG_DEBUG env var which enables control of confprog
[70bcaf90] Make unicode path fixes compile on non-Windows
[6ecbf6e0] Profiler: Fix uninitialized field in MVM_profiler_log_gc_start
[9f24debe] Profiler: Prevent overflow in the 'total exclusive time' calculation
[81f9ccdf] Profiler: Fix call graph node getting missed by the GC
[8e7e1210,289e9dfc] Silence some clang warnings and fix "mixed code/declaration" error
[5534e95f,1e448ece,...] Add new heapsnapshot format with zstd support
[4ca494f5] Profiler: Expose number of stolen gen2 roots
[87912784] Profiler: Put "stolen" gen2roots in profiler data
[370b9a29] Heapanalyzer: add debug "DUMP_EVERYTHING_RAW" to v3

Spesh:

[0f0e6d3a] Work around MSVC not coping well with preprocessor instructions inside an MVMROOT
[c61236f9] Fix access to freed memory in resolve_using_guards
[acb04a44] Fix possible memory corruption in resolve_using_guards
[3d83cb46] Add a few missing static keywords before a few functions
[40fcdb7e] Fix incorrect return type in get_effective_size
[3e8652ea] Add missing root for VMEvent SpeshOverviewEvent
[189ef298] Update deopt idx if we clone the deopt annotation
[dfbc5a45] Make deopt use index rather than target address
[c3e38bb9] Turn pushes/pops into MVMROOT again
[cf3b545e] Reinstate callsite during uninlining
[38915b93] Tweak spesh logging's new compunit handling/quotas
[b2287bc4] Fix possible memory corruption of spesh plugin guards by untimely GC
[557056bf] Fix formatting code warning in an error path
[e7bad16e] Fix pointer type mismatch warnings with a cast
[204eb28f] VMEvent: new event type: SpeshOverviewEvent
[269b73ee] Add missing break statement
[03d3db93] Sanity check if hash ever gets an initialize func
[aa2e96c4] Comment when slurpy hash has been created
[43e3d114] Output duplicate getarg ops in spesh log
[46516af4] Lower slurpy positional args to a set of getarg ops
[09bd015c] Give arg spesh more comments for when it bails
[d1af2f2f] Handle arg spesh native param passed a Scalar
[5c787f37] Only getlexperinvtype → constant if only one type record exists
[5b174f52] Allow param_*_ins ops to spesh when Int/Num/Str present
[b3469f92] Actually optimize smrt_intify when able
[654a136d] Fix panic in spesh when deserialization causes GC during fact finding
[4227c713] Fix possible invalid access to fromspace in spesh worker startup
[f18bfadb] Add missing MVMROOT in MVM_spesh_plugin_register
[5d8095b8] Spesh optimize smrt_intify like smrt_(num|str)ify

Strings:

[da19661e] Reset utf8 pointer to point at original string before use
[ff007f2f] Use right types/format string, pull dup code out
[0e412038] Show chars near bad bytes in another encoding path
[fece31c5] Free the correct things in encoding error path
[5f14524a] Show correct bad bytes in encoding errors
[5cf5c56b] Simplify freeing of buffer in UTF8_REJECT cases
[07983e4c] Fix possible access to fromspace in MVM_string_flip
[b49b5202] Fix issue #1163, gb2313 clang warnings
[8211189c] Add the reference of GB18030
[986f3403] Add GB18030 encode, decode and decodestream support
[695a24de] Fix memory corruption caused by missing write barriers in string ops
[7d7a2b73] Remove large sections of zeros in the conversion table
[709bb7ed] Add comments about how the conversion tables are generated
[5ffa9264] Generate conversion table from a source file
[bca6f392,f46e5d7e,07f6305f,6730e51f,e78080f6] Fix possible access to fromspace in some string functions
[78164189] Remove bogus MVMROOT from MVM_unicode_string_compare
[b614a7b4] Update collation data to Unicode 12.1
[8f425147] Update Unicode to 12.1
[9e6abe46,fc56c02c] Use a decode_handler function for decodestream
[75f1c965] Fixed an overflow problem
[9213f2f0] Fix duplicate includes
[73f28d38] Add GB2312 encode, decode and decodestream support

Tooling/Build:

[32003eec] Use make exit status as own
[8efd3825] Make Configure.pl and tools/update_ops.p6 executable
[277676a1] Add better support of PEA to spesh bisect
[fcdb8433] Configure.pl: Add missing return in has_native_library
[2bcb911d] Separate includes from submodules from system-wide includes
[53a6308c] Get moar build working with spaces in path

Download

2019.07.1

Core:

[79d21189] Bump level until after instrumenting instead of before to fix various races
[36cb624e] Avoid various races in profile/coverage/debug
[cb5787aa] Fix possible memory corruption in bindkey_*
[e99af058] Fix pointer arithmetic in inlined CArrays in CStruct/CPPStruct REPRs

Debug Server:

[58c54a1f] Unbreak debugger instrumentation
[052966bb] Init debug socket for Windows

Platform:

[7360ee5d] Fix GC rooting in MVM_platform_uname

Profiler:

[1c274772] Don't return null from filename()
[df226330] Add band_i, bor_i, bxor_i ops
[8f4997b3] Fix dealloc profile logging by following any forwarder

Spesh:

[536cff8b] Put limits on local and inline counts for inlining

Tooling/Build:

[cfead8e2] Only use -fno-ret-protector with Clang on OpenBSD if the JIT is enabled
[2501678a] Fix Configure.pl failing when --prefix /usr is passed

Download

2019.07

6model:

[065b2b42] When there's no .^find_method nor method cache, output debug name
[36469a62] Throw an exception instead triggering a segfault when trying to HAS before a type is defined
[fe472ce9] Enforce wb in get_attribute of C repr. Fixes non-deterministic segfaults in anything that non-trivially uses CStruct/CPPStruct/CUnion reprs
[9ed86e4c] Eliminate an unused collectable flag
[24b3ef1a] Fix inlining CStruct and CUnion in CPPStruct REPR instances

Core:

[f2ee9baa] Add freemem and totalmem ops
[1c279a23] Don't needlessly install VMNulls into ->work to reduce cost of entry into spesh'd/JIT-compiled frames
[f8743c11] Add type name to exception if a thing can't be coerced

Debug Server:

[61f0b7e8] Silence clang dangling-else & return-type warnings

Documentation:

[145149c2] Update bytecode docs to define SC acronym
[807c2dab] Add contribution guidelines

IO:

[3241e9f5] Fix memory leak in socket_read_bytes
[6bc095d8] Move freeing of event_loop_wakeup to after uv_loop_close

JIT:

[6053919e] Add exprJIT template for strfromcodes
[b55658b9] Store first and then initialize in 'create' expr template to fix potential race
[69033692] Fix decodeconf and add decoderepconf legojit
[c160a22f,69033692] Add decodeconf and decoderepconf ops to legojit

Libraries:

[a515819b] Update libuv to version 1.29.1

Math:

[0e7599e7] Throw if MVM_is_prime called with too many rounds
[2fe2f588] Use a cheaper way to force_bigint
[aad6fdc0] Greatly reduce allocation churn on bigint ops
[c5545770] Use mp_set_int in force_bigint when we know we have a 32-bit int

Ops:

[c20f896f] Skip numification in mast nodes code

Other:

[5b5e7f19] Clean up CMP object files on Windows when running make realclean
[75602b0e] Add the ability to detect the malloc_trim() function

Platform:

[dc3f36c0] Remove compiler warning that was accidently left in
[aeae1033] musl does not have malloc_trim, so only use it w/ glibc
[42ea81f3,aeae1033,75602b0e,dc3f36c0] Ask malloc to free kernel pages on GC collection to reduce max memory usage

Profiler:

[fbd48017] Remove profiling overhead from profiles
[807b92f9] Use strndup instead of malloc+strncpy

Spesh:

[ed1ce32f] Silence -Wlogical-op-parentheses warnings

Tooling/Build:

[44b69939] Fix warning in Configure in non-relocatable builds
[55b27c2a] Fix -fno-ret-protector flag passing on OpenBSD
[5f29b094] Fail when being requested to do a relocatable build and we can't
[b5172363] Default to doing a non-relocatable build

Download

2019.05

Other:

[97e28f07] Implement --no-relocatable Configure.pl flag.
[2b75a2ff] Use a relative RPATH in moarvm.
[62b58164] Update libuv to 1.26
[8f8026b1] Add MVM_execpath() to public API, a forward to uv_exepath(). The function is helpful to implement wrapper programs

6model:

[8fef1999] Reject out-of-bounds unbox slot numbers
[275098a2] Don't accept out-of-range repr ids
[7b112da3] Guard SCRef initialize against null SC
[ab21dd17] Guard serialization read against < 0 offsets
[bacfcf96] Heapsnapshot: Calculate CStruct unmanaged size
[fab0c4bd] Only Opt 32/16/8 Bit Access On Signed Integers
[9a4bbda3] Activate getattr_i Optimization On CStruct
[834db592] MVMSpeshLog: implement describe_refs for heap profiler
[ea83e229] ConcBlockingQueue: implement unmanaged_size for heap profiler

Core:

[2e87a0a0] Use C bitfields to save space in MVMOpInfo, makes these structs go from 40 bytes to 32 bytes
[65441793] Activate 2nd argument count check for invocations
[c90bd6b4] Guard getdynlex against no caller frame
[a92be015] Guard some ops in interp against type objects
[35976e24] Fuzzing: guard frame invoke error against null outers
[c8a44b8d] Make sure invalid indices for lexical vivify throw
[c10fee65] Handle inlining of outer lexical binds
[64679b99] Allow selection of max inline size per HLL. Makes it possible to set a maximum inline size limit per HLL
[5f706515] Simplify abs_n to just use fabs and also jit it (#1073)
[d1590671] Add uname op
[b51bb132] Add a newmixintype op
[28e2b38b] Add a smrt_intify op

GC:

[3dff3a2a] Ensure only one thread can take a heap snapshot or dump data at the same time

IO:

[741779ac] Better error handling of process stdin writes. Detect the case that we already closed its stdin handle
[adefbe4d] Avoid unbounded growth of active async task list
[0a9ccb11] Use UV_MAXHOSTNAMESIZE as cross platform MAXHOSTNAMELEN

JIT:

[645a70c0] Add backtrace and backtracestrings lego and exprjit template (#1085)
[3c2e98d4] Add istty_fh legojit (#1084)
[9e5196d8] Add typeparameterat exprjit template (#1080)
[0c6b3b1b] Add indexingoptimized exprjit template (#1078)
[e1dc1b39] Add fileno_fh legojit and exprjit template
[d568e681] Add typeparameterized exprjit template
[6421e512] Add resume exprjit template
[0b45ec7b] Add replace exprjit template
[5a6b9ea3] Add clone exprjit template
[33751f43] JIT sp_bind_i32 And sp_get_i32
[c5e43265] Make JIT of sp_get_o match the interp
[bfbfd0c1] JIT sp_bind_i32

Ops:

[081823ff] MAST Ops: remove redundant range checks
[8eb232db] Fix lexical to locals debug_map getting written to bytecode files in random order

Profiler:

Introduce confprog to allow profiling of specific subroutines
[423a9cc7] Fix misc. problems with profiling
[95094ae2] Count deallocated objects categorized by life time
[38252329] Heapsnapshot: properly handle empty debug name

Spesh:

[9cd8a06d] Set the default inline max size to 192 bytes
[5e363398] Avoid a bunch of malloc/free churn in code-gen
[ade57cee] Learn Type Fact About nativecallcast
[0d2968e7] Also call optimize_bb for unspecialized inlines
[bc98cb94,0d2968e7] Run optimize_bb over inlined code, Also call optimize_bb for unspecialized inlines
[5994d89c] Add facts to null op during optimize
[ff9870ec] Lliberalize eliminate_set to cover inlines
[960f4b67] Chase PHIs when retaining deopt info for inlining. Otherwise, we might not keep things alive for deopt points that need them to be alive if it was the PHI itself that got marked with deopt usages
[e41e355e] Add vivifying non-p6o object ops: sp_getvt_o and sp_getvc_o

Strings:

[295cde4f] Avoid duplicate checks in hash access

Tooling/Build:

[cc06ad28] Never build a relocatable moar on OpenBSD. OpenBSDs implementation of $ORIGIN in rpath is unreliable
[49c1eb07] Check for mixed toolchain on macOS
[12bfa1b6] Never build a relocatable moar on AIX
[0cb5eca4] update_ops: don't generate prepargs, as nqp does it by itself
[0e94d75a] Temporarily use -fno-ret-protector when building on OpenBSD to prevent segfault

Download

2019.03

Spesh:

New partial escape analysis allows objects to be replaced by registers
[03d4271c] Spesh optimize get/bind attribute for int32
[ff9666bd] Fix predecessor pointers when merging basic blocks in spesh
[75d5bc6e] Fix memory leak in inlining
[d42fd895] MVMROOT before allocation
[9eac21cb,d42fd895] Fix broken macro expansion on Windows. Fixes issue #1048
[215430c4] Lower bindattr_i On CStruct Objects
[a37c0bff] Fix wrong type selection for push_* And pop_*
[a6dad31d] Copy deopt usage info when doing guard reg split
[3629362f] Add deopt uses as needed for scalar replacements
[2d936a5a] Remove unused variable
[c29536d7] Implement deopt materialization of native attrs
[4081221b] Log target register of eliminated allocations
[0f5e2441] Correct a thinko, remove an unused variable
[357b8abc] Distribute deopt usages when inlining
[6d01c3cb] Use correct indexes for deopt usage chain lookups
[84451aa3] Switch on using the PEA deopt mechanism
[166d0acf] Log deopt offset to index outcome
[b4e059bd] Don't forget synthetic annotations
[62a8ae10] Only add deopt in for allocations we replace
[9562c74e] Note if deopt offset -> index resolution fails
[4f08a861] Materialize objects with object attrs during deopt
[77f36083] Don't confuse deopt offsets and indices
[6e1bcce9] Merge materialization deopt info during inline
[f85ae3c2] Record registers holding attrs to use in deopt
[ae3de1b6] Sketch out creating deopt/materialization info
[edfc8ffe] Keep a set of tracked registers
[fe7930e4] Dump materialization data
[e9eb9b32] Target register goes with deopt point
[7ee34c23] Preparations for deopt materialization
[685ba324] Fix inline end annotation motion on BB deletion
[072bf4b6] Handle non-merge case of PHI
[ba1f7cf3] Make it easier to grep out the EA opts
[1bfdb947] Do guard elimination during scalar replacement
[d9a0dd8b] Allow flow control, but not loops
[c19afcd5] Walk graph in reverse postorder for PEA
[895b1b0e] Properly tweak CFG after control flow op rewrite
[66d96aec] Handle int64, num64, and str attributes in PEA
[ac8f2095] Implement minimal escape analysis and scalar replacement (PEA)
[4c191154] Add BOOTHash to spesh cheat list
[3f5204d7] Disable inlining when running the debug server
[7fc6be10] Add a limit on spesh plugin guard set size
[909d354c] Allow dead instruction elimination in inlines
[0fef86cb] Save deopt usage info when writing bytecode
[c5bc342e] Fix rakudo build failure on big endian architectures
[07fe8e4a] Teach optimize_smart_coerce About Boot Types
[16d03884] Put inline-preventing insturction in spesh log

6model:

[19515dbd] Fix segfault in dump_p6opaque when an attribute holds a VMArray
[d626337b] CStruct bindattr_i Opt Shall Release Its Temp Register
[6ecbeb1f] DU Chain Of CStruct bindattr_i Opt Was Wrong
[2bc5ce7b] Fix segfaults related to corrupted CStruct STables. Fixes issue #2564
[07de9219] Fix compiler warnings on some printf specifiers
[45d15efe] Turn elems On VMArray Into Direct Memory Access

Core:

[682ca82f] Fix nativecall refresh clearing used child object pointers
[a6939d7c] randscale_n and rand_I are not pure ops, so don't mark them as such
[5431d50f] Ensure last_payload and plugin_guard_args are valid so spesh plugins can be used outside speshresolve
[600ded2b] Only read debug lexicals in bytecode version 6
[8c8b0b0f,600ded2b] Minimal handling of bytecode format version 6, Only read debug lexicals in bytecode version 6
[473324ee] Notice Specializable Instructions Everywhere In Bytecode
[1404d516] Support endian switching in writenum and readnum

Debug Server:

[d66c0708] Use debug local names in debug server

Documentation:

[6f92a01d] Specify debug name mapping bytecode format changes

IO:

[631cfdf6] Call strerror for directory errors so we get error text not just an error code on POSIX platforms

JIT:

[7ca62826] JIT compile getlexref_u*
[ce8249a3] Fix JITed extend_u8 accidentally extending 16 bits.
[ac078196] Fix rw args of native calls not getting updated if JIT compilation fails
[f818bd6d] Support double type arguments in NativeCall JIT
[f55ecdec] Fix harmless off-by-one preventing optimization
[e459d36b] Also JIT stat and lstat
[d6d057a2] Jit (open|read|close)_dir
[30ab2af3] Add op name to JIT "bailed completely" error
[583a2de8] LDLIBS should go after the source files, before output to fix TravisCI
[2ee7596d] Fix call to memcpy with NULL *src in lego JIT compiler
[45cf9013] Compile minilua with only the needed flags so it doesn't need to be compiled every time. See issue #999
[c9cd9880] Fix JIT compiled getcodename not always dieing on type objects
[caf7e4ff] Fix jump condition in JIT compiled getcodename

Math:

[eccbc854] Make MoarVM compatible with old & new LibTomMath. Fixes issue #1034
[f7204a3e] Fix name collision with existing LibTomMath Function. Fixes issue #1032

Ops:

[cbb6abc5] Add debug map state to MAST::Frame
[03304a37] Remove internal ops from MAST NQP modules

Other:

[5ed7108d] Remove obsolete MAST compiler
[6b42653a] Add the MVM_SPESH_PEA_DISABLE envvar to turn PEA on/off

Profiler:

[64d41cc1] Integrate scalar replacement with profiling

Strings:

[ec8a240e] Remove some unused variables in utf16 decode to fix issue #1030

Tooling/Build:

[f938f08c] Add some safety checks for macOS due to homebrew binutils and Xcode incompatibilities
[a1cfd702] Configure.pl: fix cross-compilation
[60c152f6] Create a GNU type TAR archive to fix archive extract using AIX tar

Download

2018.12

6model:

[6788cab6] Fix repossessions that cause object size "changes"

Core:

[987269ea] Get readnum op working, try for 32-bit num support
[30088ed4] Fix memory leak of MVMFrameExtra
[1343702c] Fix segfault on {read,write}{uint,int} on a type object
[a8e63d2f] Sign extend values when reading less than 64 bit in readint
[8e078a2f] Improve handling of failure to join a thread, throw instead of handling and provide exception text instead of just the error code
[437d5b01] Fix big endian (read|write)u?int of < qword on big endian systems
[35ea9581] Fix bytestream ops from always converting to big endian if a switch is necessary
[1c3b0c93] Fix possibility of label id clash in bytecode compiler

IO:

[a50a9d0e] Use uv_os_gethostname instead of gethostname to ensure winsock is initialized on Windows
[a994f88d] Use larger buffer for gethostname when available
[1dc540f5] Reimplement async socket introspection
[05384f21] Add a cancel handler for filewatch tasks to prevent leaking filehandles
[7c5d93ef] STAT is already used by AIX, so rename to STAT_t. Fixes AIX compilation issues

JIT:

[b8ba4707] Support endian switching in read{uint,int}
[73b079c3,b8ba4707 437d5b01 35ea9581 c32000ba 652b2f4a] Support endian switching in write{uint,int} and read{uint,int}, fix big endian {read,write}{uint,int} of < qword on big endian systems, use read_buf also when switching endianness
[c2952f9e] JIT compile coerce_sI op

Platform:

[6455d1f6] Fix double free in platform/sys.c

Spesh:

[7d353030] Set callsite in frame for JIT spesh plugin resolve. Otherwise, we won't properly mark the args buffer which can lead to us processing outdated args
[0d5f389c] Don't dump "Facts" in "Before" part of spesh log
[c2640e1d] Discover type Facts of coerce_sI op

Strings:

[4a7da329] Fix a case where the UTF-16 decoder would have a corrupted final codepoint
[fc495427] Use sys/machine.h on AIX systems in csiphash.h to fix compilation on AIX

Tooling/Build:

[caf10703] Bring trace spesh optimizer GDB script up to date
[ef9e65ca] Make sure libatomicops build file is removed with make realclean
[7eb00c0b] Add missing libuv file to Makefile.in for AIX
[474b5264] Enable detection of 32 bit AIX systems in Configure.pl. This allows the compiled program to use a large memory space

Download

2018.11

Other:

Rework the way bytecode is generated. Eliminate most of the MAST classes and allow us to compile bytecode without having to have everything in memory at the same time. The new compiler can walk the QAST tree and turn what used to be multile MAST objects into a single buffer. Now the QAST is turned into bytecode as directly as possible. This greatly decreases the maximum memory used for this operation.
[d590f25b] Ensure make realclean removes minilua binary
[9ef725d5] Always rebuild minilua to work around issue #999
[d721125d] Fix MVM_operand_type_mask in lib/MAST. The old mask was not extended when unsigned types were added.

6model:

[7ba02259] Correct named argument type tuple index calc. Fixes an out-of-bounds memory access. Resolves issue #996
[9f19fffa] Add new write_buf repr function to speed up write* ops

Core:

[dcb1dce9] JIT compile param_rp_u
[65db5b4d] Implement writeuint op
[f6fb4646] Make bytecode dumper more resilient against invalid bytecode

Docs:

[43c5cd4a] Add mul exprjit op to documentation

JIT:

[7a110b71] Add hllboolfor exprjit template
[9b2ab169] Add radix_I exprjit template
[0accc8ce] Add coerce_* exprjit templates
[5167d102] Add extend_{u,i}* exprjit templates
[0c2b13a2] Add exprjit integer multiplication op: mul_i
[d40bac9f] Use arithmetic right shift in JIT of brshift_i to ensure new bits are shifted to match the initial sign bit
[9468b7f7] Fix trunc to casting upwards
[e7a1330b] JIT compile coerce_us
[cfd6c966] Expr JIT template for sp_findmeth
[d6ad3117] Expr JIT compile serializetobuf
[40a4e375] Expr JIT compile unbox_u
[fbdb36d7] JIT compile unbox_u
[efff300c] JIT compile remaining extend and trunc ops: extend_{i8,u8,u32} and trunc_{i8,u8}
[39ded5fe] JIT compile decodertakeallchars
[64b44ea0] JIT compile writeint and writeuint
[2c4967d1] Teach the lego JIT about coerce_(iu|ui), extend_[ui]16, trunc_u(16|32)

Ops:

[6dfa5043] Implement readint, readuint and readnum ops
[231cd1a1] New serializetobuf op for assisting bytecode assembly in NQP
[07464ae3] Add a writedouble op
[311e2683] Add the buffertocu op

Profiler:

[6ff60a3b] Fix "pointer cast size mismatch" warnings on 32-bit arch's to resolve issue #444
[7aa9500e] Keep track of nativecallcast invokes
[cd4f98af] Split "cleared bytes" into managed/unmanaged to prevent underflow
[add43502] Log parent thread id on thread creation
[acb5000b] call node's first entry time should be relative
[543f53aa,3eadf765 acb5000b] Expose first entry and start time in profiler data

Spesh:

[c933b516] Free spesh log entries after consuming them. Reduces memory usage
[6236eb5d] Fix a segfault that could occur due to missing Facts
[25e7fa48] Teach spesh about known values for PHI nodes
[a74af558] output known type's debugname in spesh log
[950fb0e1] Unblock optimizing the box_* into a fastbox. Allow box_i to go through int cache.
[d8065362] decont on nativeref shall become decont_* + box_* to more easily get rid of a native ref taking instruction.

Tooling/Build:

[c0799ec1] Include system library paths in Configure.pl if configured to use them to fix issue #1000
[c130b7cd] Add a --nodelay flag to jit-bisect.pl

Download

2018.10

6model:

[8501e2e8] Fix off-by-one in multi cache spesh lookup, fixing an issue resolving multi's with named arguments
[d66206d0] [ConcBlockingQueue] Implement unshift, enabling queue users to 'jump the line'
[a7fa9e6b] save 16 bytes in MVMStaticFrameBody by rearranging struct order
[c3527467] Lower unbox of P6[int|num|str]
[429139ed,c3527467] Box lowering for P6[int|num|str] to improve NQP performance
[0c7483b3] Lower box_[ns] with P6opaque removing C call, indirections and checks

Core:

[5e1b2554] Optimize bool_I to sp_bool_I
[49f1c7bd] Lower add_I, sub_I, and mul_I where possible
[663fa2ca] Mark [sp_]speshresolve as :invokish

Docs:

[fcceaabf] Update JIT docs to include new ops

GC:

[9e90cdd6] Don't set ref'd from gen2 flag during GC
[2b09f6ec] Immediately promote objects ref'd from gen2 to speed up the usage of large or long lived data structures

IO:

[e1eb9af3] Implement async socket introspection functions
[a5dd7652] Remove per-thread libuv loop object, which was being used but unneeded

JIT:

[32a47383] Fix bug causing sleep op to receive bogus values. Was visible in Rakudo when ThreadPoolSchedular was in use, causing high cpu usage even when doing nothing
[95d22798] Update jit-bisect.pl work in the new Spesh log
[58e5161e] Fix legacy JIT of strfromname
[8c2dd3ad] Be more silent about internal failures
[adef0806] Remove MVM_JIT_BYTECODE_DIR and add MVM_JIT_DUMP_BYTECODE which dumps bytecode to /tmp/
[80b18871] Remove JIT log file and log to the Spesh log instead
[9a1cc175,8c2dd3ad] Make DynASM link errors and JIT unable to get rx pages print to STDERR when Spesh log turned on
[0554add8] Implement a perf map file on Linux with new environment variable MVM_JIT_PERF_MAP

Math:

[8f6b2ac8] Make big Int stringification 1.58x as fast for Ints larger than 2⁶⁰ (base 10)
[ad3a80cb] Fix coredump with mul_I -> div_I ops

Ops:

[abb5c69b] Implement fork op

Spesh:

[4666ff43] Make heap snapshot profiler functional again
[597ccb09] Pass on type tuple when inlining unspecialized
[1500090a] Optimize ifnonnull branches out if we can determine which way they branch
[5103e9f8] Simplify/improve optimization of decont
[196fa224] Optimize eqaddr into a constant if possible
[b2d27cbe] Tear down spesh worker in full_cleanup
[8aaf696a] Fix SSA handling of inlinees with multiple return
[7ae914b6] Fix and tidy up hllbool specializations
[ab2d58eb] Add MVM_spesh_graph_add_comment() allowing to insert arbitrary strings into spesh log
[50c76e21] Subtract nested inlinees when checking inline size
[6147e0e5] Clear up and start improving box optimization
[7f0d5327] Fix spesh dump for when inline entirely vanishes
[a4b4d837] Optimize "hot" wval lookup into spesh slot access

Strings:

[95d7e63c] Update Unicode Collation data to UCA 11.0
[41425c81] Update Unicode data to version 11.0, update grapheme break rules for 11.0 changes

Download

2018.09

Core:

[6edaac44] Add true_value and false_value to HLL config for future hllbool op

Documentation:

[156b5bc3] Clarify a few things in bytecode specification
[e17a53b8] Update the release guide a bit

GC:

[ccf3dd37] Fix alignment of nursery allocations. Fixes segfaults on armhf

IO:

[51f2db57] Add support in write_fhb op for writing 16 bit VM arrays to a filehandle

JIT:

[848f74e3] Add exprjit macros for register type constants
[18cb687c] Add ^zero/^one exprjit macros for 0 and 1 integers
[398f073b] Add param_sp and hasunipropc exprjit templates
[9e0237ed] Add binddynlex exprjit template
[3c10d230] Add getarg_* exprjit templates
[af6353d3] Add bindlex_n* exprjit templates
[9ed59041] Add reprname exprjit template
[f43ab19e] Add objprim{bits,unsigned} exprjit templates
[722f0939] Add down-cast operations to cast_unsigned_load_addr
[891d5c02] Implement truncation via unsigned cast for expr JIT
[ef474331] Teach the lego JIT to compile hllbool
[c1c2b7e3,c1c2b7e3] JIT compile hllboolfor, hllboolfor
[756a97d1] JIT compile hllbool
[37a2cd36] Increase array size of args on MVMJitTile struct
[9bef425a] Add objprimspec exprjit template
[9590c483] Implement cast_load_addr tile for exprjit
[6556de6d] Make minor JIT doc changes
[17365037] Add a macro for decoder_ensure_decoder and templates for decoder<addbytes takebytes takeline empty>
[f71f55cf] JIT decoder(empty|takebytes)
[c1b7b549] Add paramnamesused exprjit template
[f5928803] Add getpid and hintfor exprjit templates
[8a70d24d] Add ctx exprjit template
[14f6956c] Add existspos exprjit template
[77d75210][14f6956c][8a70d24d][f5928803][c1b7b549][9bef425a][f43ab19e] [9ed59041][af6353d3][3c10d230][9e0237ed][398f073b] Add unshift_*, existspos, ctx, getpid, hintfor, paramnamesused, objprimspec, objprim{bits,unsigned}, reprname, bindlex_n*, getarg_*, binddynlex, param_sp and hasunipropc exprjit templates
[1d4bd3ec] Bind 'let:' declarations eagerly in expr JIT compiler
[dc1cc51b] Tighten scope rules for expr JIT compiler
[e4542ee1] New template compiler, Single-pass compilation, Better type and format checking, a few syntax changes
[7567696e] Pass MVMRegister to lexical-binding function for exprjit. This accommodates the exprjit templates and allows us to the pass the value instead of a pointer.

Libraries:

[73e2f53d] Update libuv to 1.23.0

Ops:

[954bdf88] New hllbool and hllboolfor ops

Platform:

[3abd2888] Throw error on failure in decodelocaltime
[a8dfd479] Fix on decodelocaltime on Windows

Profiler:

[bcbe9b20] Pass an array with information on types to profiler

Spesh:

[24860d4c] Let spesh discover the type of hllbool[for]
[7c5740fb] Teach spesh to replace hllboolfor by the result for known values
[ee0004bf] Teach spesh to replace hllbool by the result for known values
[2fb3265a] Fix segfault of native subs with more than 8 arguments
[c49fc88a] Fix rw args of JITed calls to JITed native calls
[96b88eba] Leak fixes in Spash
[b217a115] Destroy inlinee after inlining

Strings:

[3e94a68f] Pass through BOM with utf16le and utf16be
[ff750504] Make sure MVM_string_utf16le/be_decodestream are predeclared
[ad12d8e4] Fix some bugs with utf16* decodestream get_chars, and retain state
[792cdd58,ad12d8e4 ff750504 3e94a68f] Add support for utf16le and utf16be to decodestream. utf16le and utf16be do not expect a byte order marker and will pass them through as Zero Width Non-Break Space per UTF16 spec
[ddde0950] Add encode support for utf16le and utf16be
[b162c7c4] Add utf16le and utf16be encoding types and implement for buffer decode
[578c2f76] Add support for utf-16 to decodestream
[f06c695a] Make Unicode Block name lookup work for unassigned cp's

Misc:

[652056de] Fix use-after-free in cleanup

Download

2018.08

6model:

[d4d8ff41] Mark functions used in Perl 6 extops MVM_PUBLIC
[4199a956] Enable gc_free of MVMContext
[e1df3411] Speedup VMArray zero_slots by using memset instead of a loop
[46c08a0e] Fix memory leak in CArray given P6 Str's
[ac3d3c76] Fix alignment/mem issue of inlined CArrays
[919e78ab] Fix race in setting the type debug name

Core:

[a24033eb] Make coerce_is/us 2x faster by not using snprintf and using dedicated integer to string code

Docs:

[73d646c6,210d27ff] Remove outdated mentions of Parrot
[411f73fd] [Docs] Add JIT documentation describing how to add a tile
[9647c1c4] ExprJIT: Document the conditional dependency check

Documentation:

[8a7da04a] Update garbage collection documentation

GC:

[e766345d] Speed up hash garbage collection by optimizing its gc_mark(); add new macros
[8ac13c29] Optimize VMArray_gc_mark to be a bit faster
[7bf4c429] Optimize SCRef_gc_mark by using faster MVM_gc_worklist_add calls
[3e91dc62] Fix MVM_GC_DEBUG worklist check for NULL STable
[2f36e266] Add branch hint macros to nursery allocation
[62a99bcf] Fix segfaults caused by sharing of jitcode in nativeCall repr

General:

[4fa8c855,940c02be,df6271af,b2c8d3ff,2194358c,50262e3c,3da1e5fb] Refactor context traversal to better support inlining

IO:

[febffaa2] Expose file descriptors of IO::Socket::INET instances
[2e946881] Expose listening host and port in asyncsocket_listen

JIT:

[2249d688] Move lexprimspec to proper emitter getrusage, threadlockcount
[9b2008a0] Add exprjit macro to retrieve fields from instance
[bc9627ba] Add exprjit macro to determine if vmnull
[70624742,33c5840c] Re-add getlexstatic_o and getlex_no exprjit templates with minor changes
[c3ef58e1] Change ^getf to load in getlexstatic_o template so it only uses a single load instruction
[0b7f26ce,1ab3b189] JIT-compile sp_speshresolve, JIT neg_I and abs_I
[1fe14d3c,bd8361e2] Define ARG5 and ARG6 on Windows since it only has 4 arguments to functions in general purpose registers
[ef41080c] Use '^addrf' macro for setf, getf
[8b522291] Remove 'unsafe' templates already in core_templates, these templates have working exprjit versions
[e242dc8f] Fix unicmp_s expr jit args
[7bcef24f] Move label assignment to tiler
[922befb2] Move exprjit oplist parser into a module
[9b44d481] JIT strfromname in the legacy JIT
[30781708] Fix JIT compiled getarg_* reading the wrong register
[d19c6608] Unbreak build on architectures where we don't support JIT compilation
[14bdaea4] Use reference counting for maintaining multiple code copies
[various] Add expr templates for eqatic_s, eqatim_s, ordbaseat, uc, lc, tc, split, join, getcp_s, indexcp_s, index_s, graphs_s, codes_s, substr_s, ordat, chr, getenvhash, backendconfig coerce_si, equaticim_s, unicmp_s, indexicim_s, getstrfromname, indexic_s, isinvokable, getlexreldyn, objprimunsigned, scgethandle, scobjcount, setobjsc, getcodename, captureposarg_i, captureposarg_n, captureposarg_s, knowhow, unbox_s, getuniname, ordfirst, repeat_s, haveat_s, getcpbyname, unipropcode, unipvalcode, hasuniprop, getuniprop_{int,bool,str}, nativecallbuild, nativecallinvoke, nativecallrefresh, threadrun, threadid, threadyield, currentthread, lock, unlock, timer, matchuniprop, iscont_i, iscont_n, iscont_s, flip, rindexfrom, atpos_n, atpos_s, atkey_i/n/s/u coerce_iu/ui decont_u, rand_i, setwho, boot*, iscont, chars, escape, getcodeobj, iscoderef, setbuffersize_fh, iscclass, findcclass, findnotcclass, nfafromstatelist, nfarunproto, nfarunalt, radix, encode, decode, istrue_s, isfalse_s, hlllist, hllhash, settypehll*, hllizefor, exception, newtype composetype, bindex*, getex*, backtracestrings, capture, multicache setdispatcher, sha1, sc, iscompunit, isnonnull, cancel, signal, watchfile, execname, isinvokable, isrwcont, async, asynclisten, getlex_n{i,n,s}, ctxcallerskipthunks, add_I, fc, encoderep, istty_fh, getport_sk, encode*conf, decode*conf, getppid, setdispatcherfor, param_rp_i, {add,sub,mul,div,mod}I, {cmp,eq,ne,lt,le,gt,ge}I, {pow,gcd,lcm}I, isprimeI, rand_I, expmod_I, bor_I, bxor_I, band_I, bnot_I, blshift_I, brshift_I, {isbig,bool,base}I, get*hllsym, print, nullptr, findmeth, cans, connect_sk, socket, bind_sk, accept_sk, tell_fh, stat, lstat, getlex{outer,caller}, bit{and,or,xor}_s,

Math:

[353940a8,e9b1b73b] Get rid of many unneeded of mallocs in coerce_sI and MVM_bigint_to_str()

Ops:

[f1256790,02bddce8] Add a negated object literal spesh plugin guard and JIT the object non-match guard
[1ed8c64c] Add sp_speshresolve op
[ec4c63e0] Mark speshresolve as :noinline
[9d4681af] Rename getstrfromname to strfromname

Other:

[e783f567] Unbreak update-changelog.p6 and use new Git::Log module

Profiler:

[69e2a388] Add a few missing allocating ops to profiler

Spesh:

[a75090c6] Lessen the number of spesh threshold levels
[b3ce4f6d] Eliminate object non-match guard in many cases
[20d44791] Fix guard evaluator attribute handling
[9745f921] Add facts to attributes in spesh plugin guards
[af455397] Refactor inline logging and detect missed inlines
[fa471f1d] Have fact discovery determine usage counts
[f59335ea] Attempt inlining so-far unspecialized callees
[24d3b5bf,155f1dfb] Fix dump of inlined spesh line/file annotations, update deopt logging
[5ef61a76] When inlining unspecialized, set arg type facts
[4373eecd] Store deopt usage separate from normal usage
[caef82f1] Correctly update OSR deopt index upon inlining
[26a91852] Mark deopt use of the write of a deopt instruction
[3df2ff91] Switch usage handling to new use chain model
[f8c4648f] Allow hllboxtype_* across hll in inlines by not using :useshll for the ops
[3727d18b] Implement box/unbox elimination
[13718793] Delete void return instruction when inlining
[6e7b215e] Update all of the guard insertion to use the new SSA versioned guards
[1a22aaa4] Copy facts when splitting SSA versions
[1347a94d] Output name and cuuid in spesh slots for code object in Spesh dump
[37b7c7b7] Discover facts about a bunch of sp_guard ops
[0daf99bc] Fix inlining of things with multiple return's
[da9123a7] Only mark stolen_deopt_ann_used if it is, to prevent a potential crash

Strings:

[3ea8f68d] Use Fibonacci hashing to determine which bucket's to put hash value's into
[9f005086] Used fixed size allocator for hashes. Nice speedup for table expansion
[6646038f] Factor out our hashing function and speed up hashing for flat strings
[0eb25300] Make parse_simple_number impossible to reach end without returning
[3ef2acf0] Hash: randomize insertion order and bucket iteration order
[0e110820] Make a faster HASH_ITER macro and make other hash optimizations
[e94d3dfd] Remove previous hash handle pointers in hash implementation
[d9a3270a] Implement SipHash, use as our hashing function w/ 64bit hashvals
[39a2e71b] Optimize uthash ptr delete code
[c5686559] Check if bucket is correct in HASH_FSCK
[e3e1d0d0] Use sized types for uthash (instead of using unsigned everywhere)
[448e75bd] Get the number of bytes to be processed from the current buffer and not from the header in MVM_string_utf8_c8_decodestream()
[4ec15fc5] Increase the result buffer size for MVM_string_utf8_c8_decodestream()
[829b8ee7] Fix a regression with grapheme segmentation when multiple regional indicators are in the same string

Tooling/Build:

[abf7d0c2] Use clang with OpenBSD since their ancient gcc creates a moar which can't generate NQP anymore.
[821cfd52] Fix tools/compare-oplist-interp-order.sh on *BSD
[888e1cf0] Add script to generate html documentation from docs
[33363d32] Make tools/ scripts executable and add shebangs
[ecff5b47] Fix NetBSD build failure by adding a missing .h suffix in build/Makefile.in
[3bf120a1] Fix Configure.pl version detection in some instances
[9601ac45] Don't store owner or group in our release's tar archive
[5bfad12b] Make update-changelog.p6 interactive

Download

2018.06

6model:

Allow MVMContext atkey to work on all sizes of native ints
Add support for all native int types to getlexref_ni
Fix three memory leaks when serialization fails
Generalize attribute_as_atomic to obj attrs too
Optimize MVM_serialization_read_int so as not to need memcpy calls
Speed up at_pos, bind_key and at_key by about 4% by speeding up dispatch
Make MVM_sc_get_sc_object MVM_STATIC_INLINE
Add some branch prediction hints to frame.c for very unlikely cases

Debug Server:

Check that socket() doesn't return -1 in debugserver
Free local variables in debugserver
Prevent breakpoints from being hit over and over in MVM_debugserver_breakpoint_check

IO:

Change getsignals output from hash to array
Define SIGBREAK on WIN32

JIT:

Implement pow_i instruction
Sort the expr jit templates with the new script
Replace 'invokish' guard infrastructure with on-stack position check and update
JIT compile getsignals
Fix encoderep/encoderepconf returning value into wrong register
Expr JIT template for encoderepconf, decont_s, assertparamcheck, param_rp_s, param_rp_o and param_sn, checkarity

Ops:

Add coerce_us op for coercing unsigned integers to strings
Add new atkey_u op
Add atomicbindattr_o and casattr_o ops
Add new guard spesh ops
Add spesh plugin ops

Platform:

Only use the 64 bit memory access code in memmem32 for cpu's that support unaligned accesses.

Spesh:

Implement a new spesh plugin mechanism, which allows for a mapping of guards to results. The setup of the guards is implemented in code running on MoarVM, and the interpreter then walks the guard table to pick the applicable result. Spesh itself can then look at this table and compile the guards in as needed, together with JIT-compiling them.
Implement bytecode assembly for speshresolve

Strings:

Make MVM_string_utf8_decode 8% faster with vectorized 8bit check
Guard against null pointer dereference in decodestream_discard
Fix potential issue in shiftjis decoder if replacement had synthetic -1
Handle synthetics and normalization properly in string bitwise ops
Use the Unicode database propcode constants instead of querying property codes on MoarVM initialization
Speed up MVM_string_find_cclass and grapheme_is_cclass for whitespace, punctuation and newline char classes
Make .lines 2x faster by speeding up MVM_find_cclass for newlines
Convert HASH_DEL_IN_BKT, HASH_ADD_TO_BKT, HASH_MAKE_TABLE and HASH_EXPAND_BUCKETS from macros to inlines
For non-MVMString hash keys, check hashval before doing a memcmp for some speed up

Instrumentation:

Free local variable in line coverage

Miscellaneous:

Add support for all native int's in lexprimspec
Put interp.c in the same order as the oplist
Fix a use-after-free in frame.c
Optimize sp_jit_enter in interp.c a few percent

Tooling/Build:

Add a script which sorts the expr templates by oplist order
Add script to compare order of oplist and interp.c op order
Fix off-by-one in jit-bisect.pl
Add Intel C Compiler as an option to Configure.pl
Fix handling of denormals for Intel C Compiler
Add branch predictor hint macros to optimize common/uncommon conditions
Fix links on releases page generated with moarvm.org release tool

Download

2018.05

Miscellaneous:

Correct op name in exception message for ctxcallerskipthunks
Remove explicit temp rooting in 'slice' interp op

6model:

Fix warning about missing cast
Improve debug helper for p6opaque dumping
Sort hashes before serialization for more reproducible builds
Add CPPStruct/CUnion-reprs where it was forgotten
Implement one dimensional inlined shaped CArrays
Fix missing bounds check in NFA results push
Change multidim implementation exception message
Make error msg lowercase; match overall msg style
Add 'slice' positional op for VMArray
For NFAs with many codepoints, use binary search

Documentation:

Add instructions to the release guide about gpg signing

IO:

Push error string argument in the right place
Check we have a concrete OS handle in IO ops
Remove repeated MVMROOT
Root correct object when pushing host/port info
Close server socket handle when client side closes

Ops:

Add new slice op

Strings:

Randomly seed a hash secret to mitigate ease of DOS attack. For more information see https://cry.nu/perl6/secure-hashing-for-moarvm
Check hash value before str eq in hash buckets. 15% faster hash lookups and insertion
Make sure hashing function never returns 0 to prevent cached_hash_code from being regenerated each time in those cases
In string index, avoid checking for concreteness multiple times
Make sure getstrfromname will resolve generated names
Use <private-use-XXXX> and <surrogate-XXXX> for as Unicode names for private use and surrogates as recommended by Unicode
Use all uppercase for Hangul Syllable names
Fix CJK Unified Ideograph and other derived Unicode names to match Unicode spec
Add a new MVMhashv type for representing the hash value
Implement memmem_two_uint32(), up to 45% faster index of short (2-3 grapheme) needles in a flat 32 bit haystack
Implement an optimized memmem for 32 bit string search 4-15x faster for flat 32 bit haystacks

JIT:

Add getlexcaller, sp_getstringfrom, iterkey_s, iterval, splice, slice, cmp_i, string cmp, lexprimspec, ctxlexpad, captureposarg, inf, neginf, currentthread, unless_s, if_s, threadlockcount, capturenamedshash, captureexistsnamed, and hllizefor JIT templates
Refactor storage of temporary variables in NativeCall-JIT code
Put jit templates in same order as ops in interp.c
Fix a DynASM issue that caused integer overflow in encoding jump offsets

Spesh:

Add bytecode size to inline log
Fix format string parameters
Put sizes of spesh graphs into the spesh log
Don't leak CUUID/name
Log graph of inlinee prior to inlining
Wrap debug printing
Set type facts on a resolved method
Specialize isnull

Profiler:

Extract recursion loop for smaller stack frames
Don't uninstrument any more
Store the size we malloc and use it with strncpy
Fix off-by-one in profile's GC dumping
Insert prof_allocated in the exact right place
Add missing break statement
Fix optional parameter allocations

Debug Server:

Don't use %b in format string
Fix mixed usage of malloc and FSA
Use official API for thread lock count
Allow unrecognized fields in messages
Throw out superfluous debugspam
Add a "handle equivalence class" command
Bump minor protocol version to 1.1 for new messagetype

Tooling/Build:

Add update-changelog.p6 tool for faster categorization of commits into the ChangeLog
Move uthash.h from 3rdparty to src/strings since it is heavily modified and cannot be substituted for the generic version of the library
Make jit-comparify break on 'ret'
Ensure make realclean cleans 3rdparty/cmp
Fix off by one issue in jit-bisect.pl
Fix Makefile indentation
Report time spent on JIT in spesh-time.p6 tool

Download

2018.04.1

Math:

Fix denormals and precision issues in Num parser

Download

2018.04

Strings:

Speed up collapse_strands 4x by rewriting to target compiler auto vectorization
Vectorize turn_32bit_into_8bit_unchecked, 10% speedup for string_escape()
Vectorize string flip operation for flat strings, ~25% speedup
Speed up string cmp by 3-5x in the general case and by 6-10x if both strings are flat
Speed up string index by 1.5x for a flat haystack and a needle of a differing type
Add support for the windows-932 variant of the ShiftJIS encoding
Fix bug in windows-1252 and windows-1252 decodestream with replacement when a replacement occurs in the last position of the input stream

JIT:

Inline simple cu string access into exprjit template
Rename ^spesh_slot to ^spesh_slot_addr and add ^spesh_slot_value
JIT expr templates for getstringfrom and getwvalfrom
JIT floor_n, continuationinvoke, ctx
JIT a few ops that ThreadPoolScheduler uses
Measure and report time spent on JIT compilation

Garbage Collection/Memory:

Ensure memory blocks in the nursery are aligned where necessary
Suspend other threads during global destruction
Spot use of an item already put in a gen2 freelist
Register sig_hash as an Instance root

Math:

Fix drift in Num->Str roundtrip; As a side effect effect div_In op becomes 14x slower
Use Grisu3 algorithm for stringifying Num's, makes Num stringification 2x faster
Fix handling of denormals in div_In op
Generalize mp_get_double()

Profiler:

Log getrusage in the profile

Ops:

Add getsignals op, queries for valid signals

Libraries:

Patch libtommath to fix build on Solaris
Add libatomic_ops as a submodule instead of in-tree

6Model:

Make tryfindmeth not throw in some cases it did
Add missing write barrier enforcement in CPPStruct, CStruct
Fix missing GC mark of deserializer contexts list
Use Fixed Size Allocator for all_scs list
Rename sc_weakhash mutex for more clarity over what it covers
Fix segfault on concurrent array access while resizing

IO:

Mark thread blocked around getaddrinfo
Make getrusage op modify an existing array instead of allocating one in the op itself
Convey the process ID of a started child
Guard against negative and zero signals in MVM_io_signal_handle
Populate valid_sigs flag set handler function if not set
Create bit-flag to indicate signals found on host

Spesh:

Keep wvals if only dep needs changing
Fix fixing of wvals during inline
Fix negated spesh of known type
Add optimize_unbox
Optimize known values for istrue
Remove object boolification from optimize_iffy
Discover type of getrusage in spesh
Fix optimization of zombie conditional causing segfault
Insert null-out-instructions before prof_enter

Debug Server + Cut module names out of filenames + Only suspend on actually must-suspend breakpoints + Add metadata for ReentrantMutex and Semaphore

Tooling/Build:

Fix loading bytecode on big endian systems
Move libatomic_ops module to a different directory
Tell user to delete folder if submodule dir already exists
Don't build specify -D_FILE_OFFSET_BITS for dyncall
Fix Solaris 32-bit build: don't build specify -D_FILE_OFFSET_BITS for dyncall
Fix Configure.pl --asan flag on clang
Add --show-autovect --show-autovect-failed flags to Configure.pl
Use Configure.pl to generate vectorization defines on clang, so we get a warning if vectorization fails for specific loops

Miscellaneous:

Fix confused pointer offsetting in FSA_SIZE_DEBUG
Fix memory corruption when running with FSA_SIZE_DEBUG set
Correct lazy static lexical deserialization
Fix small integer return values of libffi callbacks
Fix bytecodedump to understand inlines

Download

2018.03

Miscellaneous:

Add remote debugging support, optionally enabled with the --debug-port option to MoarVM. This uses the MessagePack and allows:
Suspending and resuming all threads, or individual threads
- Enumerating threads and, when they are suspended, getting their stack traces
- Reading the lexical variables of a callframe
- Setting breakpoints and getting notified if they are hit (and, optionally, suspending execution)
- Stepping
- Fetching object attributes, array elements, and hash keys/values
Add getppid op. Allows a child process to get the parent process id, and thus guess if it has become orphaned.
Panic when Dyncall fails to allocate native callbacks
Use uv_fs_copyfile API in MVM_file_copy
Make IO signal handlers cancellable
Add an tryfindmethod op which evaluates to null in the event that the method cannot be found

Network:

Ignore libuv-caused "fake" empty datagrams
Expose both hostname and port of received datagrams

Encodings:

Change arguments for windows1252/1 decodestream ops
Add proper support for replacements in decodestream for windows1252/1
Add ops for strict decoding of windows-1251/1252, decoderepconfig, encodeconfig, decodeconfig and encoderepconfig
Add support for replacements with more than one character for windows-1251 and windows-1252
Add some string consts in MVMStringConsts for MVMDecodeStream

Spesh:

optimize eq_s and ne_s against empty string in spesh

Tooling:

Bump libuv version 1.19.2
Move moarvm.org tool into proper folder. Add more release guide info
Add CMP library to ./3rdparty which is used for supporting the debug server
Add debug server protocol documentation

JIT:

Add JIT template for ne_s, const_n64, not_i, is(int|num|str|list), existskey, eqat_s, concat_s, isnull_s, isfalse, istrue, ishash
Enable box_i and box_s templates
Release only spill slots without active overlap
Warn for things that should be a size but may not be in the expr JIT compiler
Create store_write_barrier macro

Profiler:

Support for threaded profiling has been added, although it is not fully stable yet
Record thread id in profile data
Record if a thread is responsible for a gc
Count spesh time properly
Record when gc happens (msecs since start)
Fix for gigantic and wrong spesh time in profiles

Download

2018.02

Miscellaneous:

Clean up one-shot timers after firing
Fix SEGV in profiler by testing the current thread's frame in heap snapshot
Fix missing argument to syncsocket error message
Fix EOF detection on zero-size files

Strings:

Add windows-1251 (Cyrillic) decode/encode support
Refactor so code is shared between windows-1251 & 1252
Fix a bug causing encoding of ›, ˜, œ, ž, Ÿ, ™ and š with windows-1252 (Latin) to throw or fail encoding

Spesh:

Make MVM_spesh_manipulate_remove_handler_successors() public
Move annotations to istrue when split from if_o
Always split if_o into istrue and if_i
Fix MVM_spesh_log_decont not logging anything
Don't spesh log if we have a spesh_cand
Don't optimize getattr unless known concrete
Implement unmanaged_size in MVMSpeshLog repr
Run basic facts discovery on inlined code
Clean up handler successors after throwish ops become non-throwing
Put inlined blocks between their caller and its successor
Fix an off-by-one in uninline
Remove superfluous DEOPT_ONE_INS annotation on some deconts
Work around a segfault caused by type tuple without type information
Revive removal of dead instructions after the first inlined function
Fix SEGV when opening MVM_*_LOG files

JIT:

Add JIT templates for more than 44 ops
Disable getlexstatic_o for the time being for stability reasons
Fix segfault in JIT bytecode dumper on code without static frame
Add NOOP expr JIT operator
Don't output PHI in expr JIT log
Better error in boxed ref for repr_id mismatch
Add tiles for binary XOR and NOT
Fix a miscompile in sp_p6ogetvt_o
Only BAIL on DEOPT_ONE annotations on actual guard ops in expr JIT
Merge non-control-flow basic blocks so expr JIT has more code to optimize

Tooling:

Update release_guide.md with info on generating releases.html
Add script that generates moarvm.org/releases.html
Edit the ChangeLog to include the original release
Add script to generate Windows-1251 and 1252 codetables

Download

2018.01

Miscellaneous:

Refuse to make release with dirty work tree
Fix off-by-one error when checking inline boundaries in MVM_frame_find_contextual_by_name()
Make it more clear where new ops are meant to go to in src/core/optlist
Fix leak when args bind error would unwind rather than return
On Windows (not using Visual Studio), print size_t with %Iu.
Fix crash in TTY flushing on WSL (Bash on Win10)
Do less work in zeroing out VMArray
Zero out cut off elements when downsizing VMarray
Fix incorrect EOF detection on seek'ed handles

Unicode:

ucd2c.pl: Fix White_Space/space Unicode property and several other property aliases
ucd2c.pl: code cleanup and refactoring

JIT:

jit isprime_I
Un-bitrot tools/parse_jitgraph.p6
Refactor search_frame_handlers_lex for readability
Implement tile for OR operator

Spesh:

Mark sp_rebless as :noinline
Fix off-by-one error in uninline
Pay attention to return op in cross-HLL inlines
Optimize not_i when its input is a known value
Add some missing fact dependencies
Remove bogus comment and known value fact tweak
Make instruction deletion within dead BBs a no-op
Make log facts tolerate the odd outlier
Place facts on a clone op
New spesh-bisect.pl tool
Fix OSR of thread entry frame
Allow some cross-HLL inlining, this means we can inline bits of NQP (usually guts like Block.clone) into Perl 6 routines that call them.

Garbage Collection/Memory:

Fix memory leaks reported by ASAN
- The string stream decoder separator specification buffer(s)
- The static frame spesh body statistics buffer
- The spesh plan type stats buffer
- The spesh plan, when the static frame could not be added
- In MVM_unicode_name_to_property_value_code()
Debug log fixes:
Fix spelling typos in GC debug log
- Remove strange segfault-inducing debug code

Download

2017.12

Miscellaneous:

Fix ASAN flags for Darwin platform
Fix implementation of the new inline boundary indicators to set action

Unicode:

Fix it so Line_Break property returns XX as the default value, instead of incorrectly returning BK
Fix it so Numeric_Type property doesn't return an empty string for codepoints with the Digit property value
Make Bidi_Mirrored_Glyph an enum instead of storing the full codepoint value in the bitfield
Make error messages consistent which refer to synthetic codepoints
Many, many fixes and changes to ucd2c.pl, which generates the Unicode database. Most changes are not user visible but will be the foundation for making sure we return the correct property values for codepoints not in UnicodeData.txt (Primary Unicode Data source file)
- Note, we have the correct values for most of these other codepoints, but the goal is the get even these currently reserved characters working. Main pluses for this are: 1. Correctness 2. Unicode sometimes sets properties for codepoints based on likely future usage. This would allow better correctness if an older version of MoarVM is used with codepoints from a future versions of Unicode codepoints (as could be the case with OS distributions lagging behind current releases)

JIT:

Lexical handler lookups no longer prevent a lot of inlines
jit-bisect.pl now uses MVM_SPESH_LIMIT when trying to find pesky spesh bugs
Fixed issue with taking a pointer-pointer to a moving object and don't read a NULL struct

Spesh:

Extend jit-bisect.pl to use MVM_SPESH_LIMIT

Download

2017.11

Miscellaneous:

Show the actual type when "no such attribute" errors occur
In MVM_fixed_size_free and MVM_fixed_size_free_at_safepoint debug/error messages use %lu instead of %d, put in missing output in one case
Harden event loop against fast cancellations
Remove dependency on Perl 5 autodie for compilation (expression engine)
Remove duplicate env variable usage line from moar --help
Update our internal release guide to include steps for signing tags
Profiler: Fix integer literal form for 1LL << 32
Add support for a block noinline flag. Used to indicate that a block may never be inlined; will bet set by Rakudo upon spotting uses of things that need the dispatcher
Fix occasional old reads in ConcBlockingQueue
Put coerce_II op in same order relative to oplist
Retry in certain cases of EINTR in mvm_fileno, read_bytes, read_one_packet, socket_write_bytes, socket_connect and socket_accept

Unicode:

Fix uppercase letters not giving Lu for the General_Category
collapse_strands with memcpy if all strands are same type (4x faster for strands of same type)
Fix bug causing utf8-c8 synthetics to combine with other codepoints
Optimize MVM_string_concat when the RHS is a single strand that's equal to the LHS's final strand
Fix+add comments for strand concat optimization
Speed up join of longer strings by a significant amount by concating multiple times if there are more than 300 graphemes per string on average or there are less than 4 pieces and more than 150 graphemes per string.
join: factor code into join_get_str_from_pos() function
Make sure General_Category 'Cn' codepoints match with C enum
Resolve unassigned codepoints as the default property values in MVM_unicode_get_property_str
Add an additional check that the "bases" of the strands are the same length before checking if they're equal in string_from_strand_at_index.
Error message improvements to MVM_DEBUG_NFG #ifdef for synthetics

JIT:

JIT compile getarg_*, trunc_i16, param_rp_s, getrusage, coerce_II op, getexcategory
Fix labeling off-by-one causing try/catch on some frames to fail
Mark nativeinvoke_* noinline to enable JIT compilation
Treat NULL strings correctly in JIT compiled native subs
JIT compile native calls with up to 3 UTF-8 string arguments
JIT compile native calls with integer rw arguments

Iter:

Don't segfault when MVM_iter on type object
Handle unsigned types to switch in MVM_iter()

Spesh:

Fix spesh dropping MVM_SPESH_ANN_DEOPT_ONE_INS annotations
Include reason when we cannot inline in the debug output

Math:

If dividing by 1 in MVM_bigint_div, just return the numerator
Make sure both objects are the same type when short-cutting division by 1 in MVM_bigint_div
Move assignment after MVMROOT in MVM_bigint_from_bigint

libuv:

Use uv_fs_copyfile in MVM_file_copy instead of manually opening a handle and using and using uv_fs_sendfile to copy
Bump libuv to version 1.15.0
Make sure to close uv_timer handles after they are canceled

Garbage Collection/Memory + Fix unneeded GC blocking in loop + Fix pointer arithmetic in MVM_fixed_size_realloc_at_safepoint with a cast + Convert realloc plus memset 0 to recalloc in MVM_sc_set_object + FSA size debug: cooperate better with valgrind + Support FSA_SIZE_DEBUG in MVM_fixed_size_realloc and *realloc_at_safepoint

MVMROOT:

Add MVMROOT2..MVMROOT5 macros to make rooting multiple variables easier
Add a missing MVMROOT to MVM_bigint_from_bigint
Fix HLL representations of CArray elements out of sync after native calls
Add missing MVMROOTs to MVM_bytecode_finish_frame and prepare_and_verify_static_frame
Add missing MVMROOTs around managed mutex acquire in MVM_serialization_demand_code, MVM_serialization_finish_deserialize_method_cache, MVM_serialization_demand_object and MVM_serialization_finish_deserialize_method_cache

Download

2017.10

Unix socket support has been added
Add new DynASM version as submodule
Removal of Configure.pl --lua and --has-dynasm options, compiling with these included 3rdparty libs is now required
Remove build dependency on Perl 5 Test::Exception module
Make a fast path for VMArray splice using memcpy
Add a few missing casts to MVMObject *
Cache the ENV var hash after first access
Improve MVM_dir_cwd() error message
Fix missing rooting/barriering in C[PP]Struct
Fix missing MVMROOTs in type parameterization handling
Fix returned tcp port values for async sockets (ntohs). See RT#132135.
Probe for gcc -Werror=* support. This allows building MoarVM on older GCCs.
Fix issues with FreeBSD build, including adding new libuv file to Makefile.in
Protect parameterization additions with a mutex and fix for parametric type race
Bump libuv to ver. 1.14.1
Add MVM_fixed_size_realloc() and MVM_fixed_size_realloc_at_safepoint()
Fix a segfault when trying to bind a p6bigint to a matching attribute in a p6opaque
Include the type of unhandled register in error messages

NativeCall:

Factor out callback thread finding so code is now shared between libffi and dyncall backends
- Make native callback thread finding more robust
- Stash native thread ID after GC unblock
- Many NativeCall functions can now be JIT'd

JIT:

JIT compile native calls with VMArray arguments
- Basic JIT of lock/unlock
- Support unsigned ints when JIT compiling native calls
- Move null check into getdynlex func and remove bare null from getlexrel and getlexreldyn
- Don't allow low-level null from getdynlex
- Remove duplicate typedef for MVMJitCompiler
- getlex_o now returns VNMull rather than null
- Merge the 'expression tree' JIT compiler backend.
- Document the expression template syntax and IR structure
- Document tiles
- Add jit-bisect tool to help us bisect JIT issues
- Add jit-dump tool to compare JIT output between runs
- Process annotations on PHI nodes

Frame:

Ensure ->caller/->static_info can't get outdated
- Check caller chain before promotion
- Set frame->caller up earlier
- Add missing MVMROOT of outer/code_ref
- Set frame->static_info in allocate_frame
- Skip stats for frames beyond spesh max bytecode size
- Don't generate log entries for huge frames

Spesh:

Fix possible access to moved object body
- Add missing MVMROOT of return value for spesh logging
- Don't give internal workers a spesh log
- Make "Can't find nc_site value on spesh ins" non-fatal

GC:

Add more GC debug checks to help find ->caller bug
- Add debug assert in remove_one_frame
- GC block pow_I thread due to it potentially being an expensive call
- Mark thread GC blocked when locking file
- Update GC debug code for growing nurseries
- Avoid a thread yield loop in mark_thread_unlocked
- Catch frame worklist adds with NULL static_info
- Make thread GC nurseries scale to need

Build:

Sort the flags for MAST::Ops before generating them

Strings:

join: factor the concat stability checks into their own function and simplify conditionals
- join: special case 8bit flat pieces/separator. 3x faster for joining 8bit flat strings
- join: If only one item is to be joined, just return it
- join: When everything to be joined is made up of strands, copy strands instead of making one flat string
- Fix quaternary collation level's. Fixes RT#132216
- collation: simplify quaternary and use define's for the bitmask
- Speed up codes op by 10% for synthetic graphemes
- In KMP based index set max stack alloca to 3000 bytes (used to be 4096)
- Deduplicate the while loops into a #define in KMP based index
- Fix utfc-c8 encoding for values > 0x10FFFF and unicode surrogates
- Fix concat bug with utf8c8 strings, flattening utf8c8 synths
- Use the FSA for a temp alloc in MVM_string_join
- Use FSA to allocate memory in NFA
- Change realloc condition in MVM_string_utf8_decode to avoid unneeded reallocs
- Add hex digits to the end of non-unique Unicode names (i.e. <CJK Ideograph-6183>)
- Update Unicode Emoji to version 5
- Download all emoji files and generate UCD for Emoji 4 and onward
- Since Emoji names in Unicode are not guaranteed to be 100% stable, we read from version 4 onward to ensure full compatibility with older MoarVM versions and Emoji versions
- Add info about planned features to Collation docs (Language/natural sort)

Windows:

Fix ->seekable detection on TTY handles
- Fix definition of MIN causing Windows issue
- Pass user32 lib to build on Windows
- #include ws2tcpip.h in syncsocket.c

MacOS:

Only include libuv posix-hrtime on *BSD not Darwin, was causing some versions of MacOS not to build
- Fix seekability detection on MacOS

Solaris:

Solaris doesn't have memmem() so use the 3rdparty/FreeBSD one
- Fix segfault on Solaris due to the undefined behavior of passing NULL to print

FreeBSD:

- Fix getaddrinfo failing with EAI_HINTS on FreeBSD

Download

2017.09.1

Assign variable in optimize_bb loop on its own line for clarity
Revert "Fix errors when running `make realclean" to unbreak build using nmake

Download

2017.09

Allocate async process read buffer based on amount last read, with a minimum size limit
Implement the Knuth-Morris-Pratt string search algorithm
Add error string to 'failed to resolve' exception
Fix usage of ARG5 in JIT on Windows to use stack instead
JIT param_rp_i and param_rp_o
Fix calculation for maximum array size
Correct ==/= mistake in container optimization
Ensure strings created with MVM_string_repeat are in NFG form
Avoid evaluating arguments to MVM_ASSERT_NOT_FROMSPACE when it's disabled
Add up to date string documentation
Remove old strings.markdown documentation file
Speed up index 9x when Haystack is strand, needle is 1 long
Add new cached grapheme iterator
Always cache even for flat haystacks with KMP
Generate stacktraces on Travis CI when getting a segfault
Add MVM_DEBUG_NFG in more places
MVM_string_utf8_decodestream: free the buffer on malformed UTF-8
Only run NFG_CHECK on concat result that should be normalized
Revise some comments in MVM_string_is_control_full()
Make sure MVMROOT'd pointer is initialized as NULL
Align MVM_TELEMETRY_LOG usage statement
Align --tracing usage statement
Update Unicode database for Unicode 10
MVM_IS_32BIT_INT(i) with explicit casts
JIT eqat(ic|im|icim)
Building .dasc files depends on dynasm version
Add minimal 'dynamic array' library using macros
Make the JIT Graph use dynamic arrays
Cleanup JIT graph after use
Replace explicit JIT function return frame check
Wrap dasm_State in MVMJitComiler structure
Fix unlikely but possible stack overflow from user input
Allow MVM_string_get_grapheme_at_nocheck to be inlined
Make eqat 1.7x-2.5x faster
Fix indentation of switch in substrings_equal_nocheck
Use PRIi64 macro instead of %lld in MVM_coerce_i_s
Replace all uses of sprintf with snprintf
Consistently use MVMuint16 for was_multi
Add some explanation of GET_REG and cur_op to interp.c
Use < or <= sign for all conditionals in strings/ops.c
Rework MVMNFGSynthetic to not store base separately
Only use MVMGraphemeIter_cached for strands in KMP index
Split out JIT compiler init/deinit
Organise architecture-specific JIT source files
Check return status of DynASM
Remove JIT intermediates in make clean
Add 'POP' dynamic array method
Flush log on oops
Refactor labelling in JIT
Add spesh iterator and replace JitGraphBuilder
Fix leak of JIT graph
Simple fix for duplicated labels
Use VECTOR macro arguments only once if possible
Add vector SHIFT method
Enable JIT breakpoint insertion
Use single DynASM build target
Compile less with --no-jit
Add old-style suffix rule for dynasm compilation
Atomic increment not required for JIT sequence nr
Move size check into COPY_ARRAY
Correct buffer handling in UTF-8 fast->slow path
UCD: For sequences, convert from \x{ } to the Unicode codepoints
Flush standard handles at exit
Flush output buffer where needed
Ensure write to unwritable handle fails right off
Don't try and sync when flushing is enough
Better if_o/unless_o optimization in some cases
Do dead BB elimination pass after branch deletion
Optimize MVM_string_gi_move_to
Don't decont native refs when spesh logging
Handle native refs better in spesh stats
Support spesh multi resolution involving nativeref
Set facts on nativeref deconts
A little refactoring of second optimization pass
Remove fact copy we most likely don't now need
Re-flow and better explain set elimination code
Fix bug in gi_move_to if not starting at 0
Introduce a binary format for heapsnapshot, wtih snapshots at the beginning of the file
Immediately write heap snapshots to file instead of keeping them around in memory
Write parts of types/static frames/strings incrementally into heap snapshot file
Add gc_describe functions for new spesh data structures
Use grapheme iterator cached for ignorecase/ignoremark index ops
Take more care when eliminating set inside inline
Re-compute dominance tree before stage 2 opts
Add a reliable locals count for inlines
Move throw -> goto optimization to second pass
Mark GC blocked when acquiring I/O mutex
Only use grapheme iter cached if the Haystack is a strand for index*
Don't try to duplicate unreachable handlers on inline
Ensure gi->start is set to 0 for flat strings in MVM_string_gi_init
Fix a leak in CArray REPR
Merge Full Unicode Collation Algorithm Implementation
Remove unneeded file from UCA implementation
Nativecall: fix invalid pointer creation
Fix ignoremark with Prepend characters and ordbaseat op
For degenerate Synth's with Prepend and Extend set base cp to 1st cp
Fix case change when base cp isn't the first cp in synthetic
Fix elems of ConcBlockingQueue REPR
Implement getrusage op
Add documentation on UCA collation implementation
Include debug names in some wrong REPR errors
Fix MVMROOT in socket port/host code added in last release
In README, note that release tarballs won't work out of the box and point to where to get working ones
Expose number of locks held by a thread through an op
Add missing concreteness checks in thread ops
Fix errors when running `make realclean
Store smallint value in 64bit if we negate them later
Fix segfault when compiling nqp with musl as libc
Avoid recursion in optimize_bb() when only 1 child node

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2017.08.1

Fix regression in Windows JIT build
Remove broken JIT of parameter operations

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2017.08

Dynamic optimization moved to a worker thread
- Threads now write sequential logs into a log buffer, and send it to the worker thread in a concurrent queue
- Quota of logs to avoid excessive memory use, with a boost when entering a new compilation unit for the sake of OSR
- Added MVM_SPESH_BLOCKING environment variable to allow for reproducible specialization results when debugging
- Reworked installation of specializations
- Reworked OSR implementation to account for specialization being done on a worker thread
New statistics model for making better specialization decisions
- Frames carry a correlation ID to allow reconstruction of call stack and analysis on the specialization worker thread
- Produce specializations based upon most common occurring types, not just those sampled immediately after passing a threshold
- Megamorphic code gets a non-type specialization and may be JIT-compiled
- Remove hard limit on spesh candidate count
- MVM_SPESH_DUMP updated to show statistics and planned specializations
- Updated log analysis and guard insertion to use the new statistics model
New argument guard, based around a tree, which means less checks need to be performed when deciding on with specialization to run
Add dumping of new argument guard structure
Log time that specialization work consumes
Add a script to sum up logged spesh times
Better organization of MVMInstance and MVMThreadContext fields
Removed now-unused cur_usecapture field
Avoid passing a real NULL as an object argument in stack unwind handling
Disable spesh in initial load/deserialize; there's no useful data at this point
Add thread ID range check to GC debug mode
Deduplicate code from MVM_string_indexing_optimized
Start off collapsing strands as 8bit instead of 32bit
Concatenation improvements
- When concat needs normalization only normalize one section
- Don't trigger re_nfg on concat for base character + combiner
- Add functions for iterating the codepoints of a grapheme
- Don't re_nfg when last_a or first_b are synthetics in concat
- Don't take the no re_nfg shortcut if a repetition contains a synthetic
- Don't do re_nfg shortcut if either a or b are repeats
- Use MVM_string_graphs_nocheck when able in concat
- Fix conditional to check first instead of last strand of string b
Enable native callbacks on different threads
Fix double-decrement of unused args in inlining
More detailed dump of spesh slots
Don't NULL out spesh slots; they may be re-used
Make JIT include SC write barriers
Stronger validation of code objects in optimizer
Refactor code into iterate_gi_into_string() to reduce code duplication
Move collapse_strands() after iterate_gi_into_string()
NULL out registers on re-OSR
Only devirtualize REPR funcs in JIT when concreteness is known
Fix JIT of nqp::ordat and nqp::ordfirst
Update TinyMT to version 1.1
We always have threads now (thanks to specializer worker), so remove single threaded VM instance lock avoidance paths
Improve GC thread sync-up
- Simplify handling of the thread list
- Introduce GC orchestration mutex/condvars, and use them to avoid busy waiting when synchronizing threads for GC
Avoid many array searches for SC code refs
JIT param_sp and param_sn
Inability to open telemeh log shall not be fatal
Output spesh worker info on telemetry channel
Size of MVMFrame reduced
- Eliminate effective_handlers field in MVMFrame
- Eliminate effective_bytecode field in MVMFrame
- Add function to encapsulate special return setup
- Move special return into a frame extras
- Move continuation tags into frame extras
- Move invoked_call_capture to frame extras
- Move dynamic lexical cache to frame extras
- Eliminate throw_address from frames
- Force MVMReturnType to be a single byte
- Toss never-used nameds re-use logic
- Eliminate need to memset MVMFrame
- Remove historical, now-unrequired, nullings
- Use a bit field for named args used when possible
Improve NFA memory performance
Small optimization to string_equal, remove repeated checks
Remove two invoke handler functions we don't need
Remove long-unused newlexotic/lexoticresult ops
Remove now-dead newlexotic functions
Remove now-unused pool_index in MVMStaticFrame
Eliminate now-unused Lexotic REPR, lexotic cache
Remove a dead field
Remove unused gotolexotic function
Move spesh data into a separate object from MVMStaticFrame, for less memory use and better GC performance
Break MVM_sc_get_sc into inline and slow path
Delete unused var in MVM_string_ascii_encode_substr
Avoid range check on every SC object access
Delete unused var in MVM_string_latin1_encode_substr
Fix MVM_string_compare to support deterministic comparing of synthetics
Disable JIT when we're not allowed to make memory executable
Have MVM_string_codes iterate the string with codepoint iterator
Speed up attribute reads during invocation
Document the various op adverbs
Reduce duplication and simplify logic in invoke
Move checking part of force_to_heap into an inline
Allocate frames on heap that tend to need promotion anyway
Improve deopt logging output
Append, not prepend, moved deopt one annotations
Turn decont into a deoptonepoint and insert guards after decont
Store deopt one target directly in bytecode rather than calculating it each time
Implement speculative pre-selection of specializations and inlining based on guarding against the invocation target
When inlining, replace receive instruction instead of send instruction, to better cope with register re-use
JIT pow_I
Validate range of branch target in spesh code-gen
Anchor inlinee handlers to inliner entry
Fix and expand dead basic block removal
Remove duplicate use of named arg checking
More sophisticated named arg handling in spesh, removing sp_namedarg_used op
Make it possible to cancel an async socket reader
JIT rand_I and also give it a smallbigint path
Ensure that serialized padding bytes are 0
Avoid uninitialized bytes in default tables
Avoid uninitialized bytes at the end of serialized tables
Add -Werror=pointer-arith for gcc
Put hard upper limit on bytecode size to optimize
Move annotations multiple basic blocks if needed
Eliminate "blocked by alias" propagation checks
End basic blocks after all throwish/invokish
Extra fflush so spesh log is written before crash
Ensure frame handler start/ends are BB boundaries
Don't explode on spesh dump when no facts
Cope with extra successors when inlining
Factor out and re-use dead BB elimination
Allow for GOTO handler to become unreachable
More precise CFGs for control exception handlers
Add indexim_s op and improve/fix bugs in eqatim_s
Further harden against removed handlers
Add debugging aid for spesh preselection
Make rebless deopt stack top frame also
Bump usage of writers in deopt instructions
Start storing/using static frame in inline table
Use register holding code ref for deopt purposes
Can never inline frames declaring state vars
Correct handler order when inlining
Implement inlining of basic lexical lookups
Tune the inline size
The listen callback shall also push socket and peer IP and port
Don't set a bit we're meant to be clearing in GC gen2 promotion
Harden listen_cancel against dupe calls
JIT nativecallcast, trunc_i32, extend_i32
Make sure the libffi callback can be reused
JIT the create op
Check ffi_closure_alloc() return value
Implement atomic ops
- Provide a way to have an int type sized to the architecture's atomic size
- Implement cas for Scalar references and native integer references
- Implement atomic load and store for Scalar references and native integer references
- Implement atomic increment, decrement, and add for native integer references
- Provide an op for doing a full memory barrier
- JIT of the new atomic ops
Fix a bug in index/eqat(im) and in ord_getbasechar
Add nqp::coveragecontrol op
Remove two more unneeded strlen from nativecall.c
Only foldcase the needle for ignorecase operations
Remove impossible less than zero checks on unsigneds
Add GC debug check on frame heap promotion
Correct an MVM_ASSIGN to barrier the right target in continuation invocation
Root thread object while creating thread context
Correct invokewithcapture GC handling
Extra GC debug checks after frame promotion
Blacklist unhandled param ops in spesh args handling
Add hostname to failed to resolve error
JIT param_rp_o and param_rp_i
Introduce NFG_CHECK which checks string is in NFG form
Fix concatenation bug when renormalization needed
JIT setcodeobj and captureinnerlex

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2017.07

Full Unicode 9.0 and Emoji 4.0 text segmentation support
- Improvements to segmentation of Emoji w/ GCB=Other
- Use GCB instead of HST to avoid property lookup for Hangul
- Reorder conditional in maybe_hangul() to be more clear
- Work Hangul grapheme segmentation into GCB switches
- Don't break after ZWJ for Emoji=True + GCB=Other
Make string_index 16% faster for non-identical string types
Greatly reduce the cases when string concatenation needs renormalization
- Use normalize_should_break to decide if concat needs normalization
- Rename should_break to MVM_unicode_normalize_should_break
- Fix memory leak in MVM_nfg_is_concat_stable
- If both last_a and first_b during concat are non-0 CCC, re-NFG
Improve the speed of normalization. Improves speed of slurping non-ASCII Unicode files
- Speed up ccc by making ccc_relative using integer prop lookup
- Rename is_control_beyond_latin1 to is_control_full
- Use MVM_string_graphs_nocheck in more places throughout strings/ops.c
- Rename relative_ccc to MVM_unicode_relative_ccc
Remove arbitrary string repeat limit
unicmp_s improvements
- unicmp_s can now reverse any of the collation levels
- Handle additional possible cases in collation
- Store collation levels in an array not a single value
- Handle quaternary collation level being both enabled and reversed
Improved instruction and basic block deletion handling to allow further code elimination
Only compile in \n -> \r\n on Windows
JIT-compile write_fhb and encode ops
Include return type facts for the encode op
Implement setbuffersize_fh op, which sets up output buffering for synchronous file handles
Fix error message for decodersetlineseps getting non-decoder
JIT open_fh, close_fh, read_fhb, decoderaddbytes, fc, chr, getcp_s, and objectid
Remove synchronous process support
Add new asynchronous permit mechanism, which can be used to provide delayed starting of reads and back-pressure
Implement permits handling for asynchronous processes
Convey file descriptors of stdout/stderr pipes when spawning an asynchronous process
Add debug helpers: MVM_dump_bytecode, MVM_dump_bytecode_stackframe and MVM_dump_bytecode_staticframe
Add gdb command to give a history of spesh optimization decisions
Improve specialization dump: less trailing spaces, chop up facts list by register
Empty out instruction list of removed basic blocks
Eliminate duplicate code in utf8 decoder
Fix overflow in uniprop lookups
Fix ASCII streaming decode error handling
Make illegal synthetic an oops, not a panic
Make some fixes to the Unicode data file downloader
Use MVMint64 for MVM_string_chr (oplist/function mismatch)
Fix an accidental nested redeclaration in process handling
Tweak the format of oops messages
Improved debug output for serialization errors
Fix ARM build
Clear cached dynamics when taking continuation
Missing MVMROOT during an allocation
Remove never-assinged use_mode_frame field from CallCapture
Remove now-unused cur_usecapture per thread
Eliminate mode flag from CallCapture
Fix invokewithcapture to keep the used capture alive
Always copy callsite into an MVMCallCapture unless it's interned
Remove now-unrequired effective_callsite
Add decodertakecharseof op
Copy correct length in get_all_in_buffer
Fix ctxcode op to not leak a NULL
Fix decoder typos

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2017.06

Make coerce_s_n work more like the Perl 6 Str.Num method
Eliminate socket string I/O
Re-implement synchronous sockets without using libuv, enabling them to be passed between threads
Add ability to get port from already bind-ed socket
Add cpucores op to get the number of CPU cores
Fix inconsistency in decode stream take bytes API, so it returns null if that number of bytes is not available
Fix memory leak in syncpipe
Removed unsed header file in threads.c
Remove unused args to bind_stdio_handle
Remove char-level I/O ops and the functions they called
Remove char-level I/O from synchronous I/O vtables
Remove unused encoding option in dir handle
Re-implement print/say debug output ops to encode and then use binary I/O
Eliminate use of libuv in synchronous file handles
Switch standard handles to use the new synchronous file handle code, which means they can now be safely used from multiple threads also
Remove unused ->filename slot of syncfile
Debugging aid for introspecting P6opaque objects
Support merge_bytes in async proc ops, for reading STDOUT and STDERR together
Support binding handles to file descriptors in async procs
Fix off-by-one in profiler node GC
Add string eqat/index ignorecase+ignoremark functions
Add new eqaticim_s and indexicim_s ops ignorecase+ignoremark
Use norm instead of n for the normalizer variable
Add improved support for GCB=Prepend
Improve Regional Indicators support during normalization
Serialize a Decoder REPR object into null, so incidental file handle serialization in Perl 6 does not blow up
Improve named argument optimization, so we can specialize and throw out instructions in more cases
JIT decodertakeline
Fix missed opportunity to run JITted code
Have inline log note what couldn't inline also
Remove successor when optional named argument is passed, so default code can be eliminated
Flag writers that die when a basic block is eliminated, and disregard them in PHI node analysis, provide more precise type information
Make a basic block elimination pre-pass before the main optimization work
Set dead writer when deleting instructions also, to further aid PHI merges
Track which basic blocks are part of a jump list
Delete pointless goto instructions (those at the end of a basic block that simply go to the next block)
Remove bad Windows quoting option async proc code
Actually log inlines to stderr as the comment up top claims
Make find_separator only look at the last chars, which is far cheaper
Add help text for environment variables to Configure
Move NFG initialization into nfg.c
Cache CRLF grapheme value
Cache maximum separator length, to save recomputing it for every line that is read
Cache a list of final separator graphemes, for faster stopper detection in streaming decoders
Introduce a max final grapheme codepoint filter, for faster stopper detection in streaming decoders
Add a UTF-8 decoding fast-path that doesn't need to go through the full normalizer
Keep last freed chars buffer handy for re-use in streaming decoder
Make a smarter guess at decode result buffer size in streaming decoder
Don't copy when we can steal decoder output, saving a memory copy in most line reading operations
Various micro-optimizations to UTF-8 decoding fast path
Fix newline translation in various encoding's streaming decoder

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2017.05

Mark profiler call graphs iteratively instead of recursively
Keep around line number annotations in spesh, for more accurate source position information for coverage data in specialized code
Introduce "telemeh", a high-precision-time low-impact logger
Fix error reporting in chdir
Fix memory leak on error in chdir
Travis: readlink doesn't have -f on MacOS so make our own solution
Fix bug in index ignorecase and equal at ignorecase
Fix all known remaining bugs in indexic and eqatic
Zero slot when popping a VMArray, to avoid junk reads if it grows again later
Add can_fit_into_8bit funct, put logic used many places into one function
Use -1 instead of 0 when long right-shifting negative smallints
Remove workaround for tommath issue #56, which is now fixed upstream
Don't crash on reading a closed dir handle
Remove deprecated async string I/O ops

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2017.04

Shorten the nursery when creating large bigints, to bring GC forward and resolve excessive memory use
Use correct format for repeat/concat errors
Fix bug in indexic_s if expanding codepoint is the last codepoint
Special case "\r\n" in MVM_nfg_is_concat_stable for performance reasons
Further optimize MVM_nfg_is_concat_stable to speed up concatenation
Do not set use rpath if installing into proper system locations
Optimize passes_quickcheck_and_zero_ccc to be much faster
Give this_repr constants more meaningful names to aid debugging
Streamline MVM_bigint_radix and MVM_radix for Nd Unicode #'s
Fix case-insensitive string compare bug when synthetics are in the haystack
Improve description for "should eventually be unreachable" error
Correctly detect and handle overflow in mp_get_int64
Split into mp_get_int64 and mp_get_uint64
Only allocate and normalize for cp's that require it in MVM_string_chr, and short-circuit Unicode property test for codepoints below 0x300
Provide a better error when failing to encode surrogates in UTF-8
Add a cast to suppress a compiler warning in strings/ops.c
Factor out code from equal_at_ignore_case for use in index_ignore_case also
Use both hex and decimal for UTF8 encoding error messages
Add parentheses in various places to suppress compiler warnings
Use PRIu64 in fprintf's to fix compiler warning about incorrect types
Add a check that introspection->is_tty is not NULL, avoiding a crash
Mention debug_name in errors about uncomposed repr
Add new --coverage option for Configure.pl
First prototype of a per-line coverage reporter, enabled by setting MVM_COVERAGE_LOG
Cope with a native type with no nativesize, but signedness
Remove two functions in normalize.c that have been superseded
Give collapse_strands a 5.4% speed boost under some workloads
Add MVM_string_graphs_nocheck funct, use it in places we previously already checked
Have a two-part loop in collapse strands to make loop tighter when possible
Implement serialize/deserialize in VMHash REPR.
Use memmem in string index. Uses Knuth-Morris-Pratt on glibc, and adds the FreeBSD memmem.c for use on Windows
Fix a join NFG bug when there was an empty string and an empty seperator
Reorder MVMStaticFrameBody to save 16 bytes according to pahole; similarly save 16 bytes in MVMCompUnitBody, 24 bytes in MVMJitCode, 8 bytes in MVMIOSyncStreamData, SerializationRoot and SerializationReader
Remove arbitrary and small length range check for reading bytes from a file
Remove unused defines in threadcontext.h
Greatly reduce contention in the fixed-size allocator for multi-threaded programs, giving up to 40% speedup in some cases
Add continuous coverage analysis to Travis builds, along with other Travis improvements
Mark thread GC blocked when doing synchronous writes
Add missing MVMROOT when reading bytes, which could result in occasional data loss

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2017.03

Fix some missing variable initializations
Set effective_handlers in context-only frame
Streamline code in hash computation, hopefully fixing a Coverity warning
Detect and throw on over-size array
Put in a limit for codepoints in a grapheme, to avoid various overflows
Fix a missing NULL check at end of profiling
Panic when a new thread context can't create an uv_loop
Better handling of out of memory when creating a thread
Another attempt at silencing the pthread_yield warnings
Missing GC block marking in event loop starting, fixing a deadlock
Fix CArray marshalling of type objects
Provide a way to put Decoder in nl-translate mode
Ensure Decoder REPR never sees concurrent use
Debug option to detect concurrent VMArray use
Encode strings as UTF-8 in MVM_unicode_string_from_name
Reword exception message for read() outside original thread
Check that results of repeat/concat fit in an MVMString
Fix div_i JIT round to negative infinity
Ignore SIGPIPE by default
Only start readers if a process spawned OK
Remove deprecated char-mode async proc reading
Signal error to stdout/stderr on spawn failure
Do gen2 sweep before letting stolen threads go, fixing occasional SEGVs
Turn libtommath dependency into a submodule, use a MoarVM fork
Update libtommath fork to have expmod hang fix
Change MVM_string_equal_at_ignore_case to use fc
Fix MVM_string_equal_at_ignore_case when folding the haystack changes length
MVM_string_equal_at_ignore_case no longer applies a case changing operation to the entire haystack. It now only changes case for as much of the haystack length as is needed. ~30%+ or faster depending on on haystack length.
Mention debug name and REPR name in "requires obj with repr X" errors
Remove unneeded variable in MVM_string_index
Add MVM_string_index_ignore_case function and indexic_s op
A range of improvements to the MoarVM GDB plug-in

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2017.02

Fix format strings that warn during compile
Implement missing cleanup of async task handles, fixing a memory leak
Make Unicode sequence and codepoint name lookup case-insensitive
Add Unicode sequences from NamedSequences.txt in the Unicode database
Remove second declaration of MVM_frame_destroy
JIT MVM_radix()
Make radix and radix_I 50% faster with Unicode Nd
Add East_Asian_Width prop
Fix memory leaks in synchronous sockets
Fix crashes in socket connect error handling
Don't leak memory in STable repossession
Missing MVMROOT around a lock acquisition
Refuse to form an NFA with a zeroed to-state
Add data section for JIT code, and use it for extop 'fake' registers
Correct typo in NFG trie node struct name
Fix overflow in div_i op
Implement support for synthetic graphemes in MVM_unicode_string_compare
Implement configurable collation_mode for MVM_unicode_string_compare
Use LDFLAGS in ld invocations
On Windows, create UTF-8 encoded argv upon program entry
On Windows, populate environment hash from Unicode environment
Some additional heuristics to cut down on cross-thread write log output
Fix abs_n op for negative zeros
Sort out semantics of closed async sockets
Fix overflow on 32-bit systems in is_full_collection()
Rename MVMArray file and constant to VMArray
Remove bogus indication that MoarVM builds on cygwin
Use utf8 for unicode_db files
Fix invalid read when GC was triggered in the string repeat op
Don't call MVM_string_graphs twice in indexing op, plus cleanup

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2017.01

Extract spesh block allocator from spesh, for wider use
Add a number of missing MVMROOTs, which could lead to outdated pointers; also removed some unrequired MVMROOTs
Fix arg_flags allocation sizes
Remove an obsolete path from ldrpath
Check lexical accesses in GC debug mode 2 also
Add a #define to turn on inline logging
Fix callstack reset bug, which could corrupt deeply recursing callstacks
Don't allow re-compose of a P6opaque
Add a new unicmp_s op, which compares using the Unicode Collation Algorithm
Make sure we generate all values of the Line_Break property
Re-implement utf8-c8 encoding, fixing bugs and ensuring that non-NFC input will round-trip properly also
Implement Bidi_Mirroring_Glyph as an integer property
Implement Emoji grapheme breaking and other combined codes
Add support for Grapheme_Cluster_Break=Prepend from Unicode 9.0
Make sure we break after Prepend if it's a control character
Add a script to download the latest version of all of the Unicode data
Missing rooting GC in rare exit handler case
Implement new setdispatcherfor op and add JIT for it
Use much faster atoi function in normalizer; 14% less CPU use when slurping a file in UTF-8 encoding
For Decompose_Type, use int lookup instead of str for better performance
Fix heap snapshot crash on eventloop thread
Use /usr/bin/env perl for ./Configure.pl
Don't break after ZWJ or for MALE SIGN and FEMALE SIGN
Take into account actual allocated size of I/O buffers in gen2 promotion statistics
Tweak full collection criteria in heap profiling
Free up spesh log slots after specialization, avoiding some leaks
Removed the getregref_ ops (unused by NQP or Perl 6)
Removed the continuationclone op (unused by Perl 6)
Enforce one-shot invocation of continuations
Greatly simplify handling of call frame working register lifetimes, leading to consistently shorter lifetimes, less memory pressure, and faster calling
Eliminate now-unused tc field in MVMFrame, saving a pointer per callframe
Simplify args cleanup functions
Reduce number of checks in call frame marking, making it faster
Implement getstrfromname op, to get named Unicode sequences
Fix GC in spesh triggered by managed mutex use
Fix data race in inlining extop fixup
Fix data race in callsite fixup during inlining
Fix data race in string fixup during inlining
Fix charname lookups of LINE FEED and CARRIAGE RETURN
Remove Unicode 1 names and add Unicode Name Aliases
Convert MVM_malloc+memset to MVM_calloc
Clean out ancient "remove after rebootstrap" line
Fix typo in MVM_CALLSTACK_REGIONS_SIZE's name
Fix missing cleanup of managed DecodeStream
Have DecodeStrem clean leftover char buffers
Fix a typo in decode stream destroy function

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2016.12

Decode Latin-1 and UTF-8 strings to 8-bit width when possible
Teach a few string functions to compress results into 8-bit storage
Fix for AIX's INFINITY not being a constant
Unlink libmoar before (re)installing it
Add configuration for AIX
Support Perl older than 5.10 for Configure.pl
Use "pkgconfig --libs libffi" additionally to --cflags
Fix powerpc detection on AIX (gcc)
Make multidim error messages say they are multidim
Add comment about where to find UNIDATA
Implement captureinnerlex op, for fixing QUIT/LAST phaser scoping in Perl 6
Fix mis-sized free in the NFG trie that only showed up in 32-bit
Add GC debug helper to "find" a pointer in nurseries/gen2 bins
Make ASSERT_NOT_FROMSPACE check fromspaces of all threads
Fix missing MVMROOT around an allocation
Fix typo in nfg.h comment
Fix native callback and GC interaction when embedded
Add GC block management functions to the public API
Mark throwpayload* as :throwish in oplist
Optimize the check for negative bignums
Remove useless mp_neg calls
Fix premature free of UV socket handles
Fix premature handle free in async UDP sockets
Add a "check every register access" GC debug mode
Provide a #define to disable dynlex caching
Provide a #define for deopt logging
Invalidate dynlex caches during deopt
Fix pow_I when it takes an exponent larger than 2**32
Only do MVM_ASSERT_NOT_FROMSPACE in GC debug mode
Add a fromspace assertion in finalize
Avoid a number of spesh GC invariant violations
Panic if we try to GC when speshing/JITing
Ensure we don't leak partially deserialized objects
Fix unrooted frame around SC object lookup
Remove some GC debug code
Avoid reading nativerefs in spesh, since it can cause boxing and thus GC
Cope with push being used on concurrent queues
MVMROOT around putting work on concurrent queue
MVMROOT eventloop queue when polling it
Do MVM_ASSIGN_REF after block/unblock in concurrent queue
Fix more unrooted frame around SC object lookup

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2016.11

Workaround tommath issue #56 which affects random bigint numbers > 32 bits
Fix memory leaks in nqp_nfa_run
Fix a sizeof arg that allocated a much-too-big buffer for callsite arg names
Add missing breaks in MVMString's copy_to
Prevent null deref when calling MVM_string_utf16_encode
Corrections to mkdir on Windows
Introduce MVM_SPESH_LIMIT, which limits how many specializations will be performed; this is useful for debugging which specialized block is to blame for a bug
Make sure we never box a NULL filename when creating backtraces
Fix the nativecall attribute error messages
Remove (non-existent) num16 from error message
Make the fixed size allocator provide useful information to Valgrind
Implement serialization of SCRef
Include file/line of unserializable closure, to aid debugging
Add type info when failing to bind an attribute
Use ffi_arg type for libffi nativecall return types
Handle libffi return type more correctly
Work around missing libatomic_ops prototype on s390x
Panic when trying to GC a locked mutex
Make VM panic output state that a panic occurred
Fix JIT code generation bug in nqp::exception
Add missing rooting of value pushed to concurrent queue
Add src/gc/debug.h dependency to Makefile
Mark a thread GC-blocked while it is in native code
Have "Cannot * a type object" also outputs the type's debug name
Don't reveal partially deserialized method cache
Give a bunch of exception ops REPR and debug name output
Prevent segfault when null string used as hash key
Request POSIX.1.c compliance on solaris
Change to use readdir insteal of readdir_r
Use GCC on solaris by default
give diagnostic output when compiling fails
Handle current Solaris compiler not understanding -mt
Fixed readdir so it won't check old errno
Work around clock_gettime issue on OSX
Refactor hashes to no longer need to flatten ropes in string keys
Save 8 (64-bit) or 4 (32-bit) bytes per entry in the MVMHash REPR
Remove the deprecated flattenropes op
Remove now-unused MVM_string_flatten function
Don't treat an nread of 0 in libuv read callbacks as an error
Bump to latest libatomic_ops

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2016.10

Fix build without libtommath source
Make MVM_file_open_fh() throw if the file we opened was a directory
Fix bug and memory leaks in MVM_file_open_fh()
Add error message for likely MacOS build failure
Don't set inheriting process on inherited pipe, fixing a segfault
Update to the Unicode 9 database
Die on CStruct without any fields
Constant-fold unipropcode and unipvalcode
Use PRId64 instead of %d for 64 bit int format string args
"Cannot unbox type object" error gets debugname and native type info
Fix uninitialized arg_names of an MVMCallsite
Handle C++ constructors on libffi
Fix CUnion get_attribute treating inlined attrs as pointers
Fix 32 bit issue with rw args in NativeCall callbacks
Use better throw-away type for void nativecalls
Gracefully handle a 0 RSS reported by the Linux kernel
Fix "Invalid free()" in empty repossessed arrays
Make sure we mean "signed char" when we say "char"
Fix calculating structure sizes for arm64 and others
Disable JIT on x32, since it has a different calling convention
Fix pointer size unit in configure message
Use set_uint64 in from_num, otherwise we overflow on x32
Rewrite mkdir_p api, no function changes
Improve nativecall attribute error messages
Include debug_name in crossthreadwritelog and serialization errors
Deprecate async string I/O ops
Deprecate flattenropes op
Implement indexingoptimized op (replaces flattenropes, but is not in-place)
Fix memory leadk in ord_basechar_at
Ensure errno is grabbed before MVM_free is called
Make extra sure unlock only happens if lock happened

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2016.09

Do not crash when the container configuration can't be read
Correctly calculate the work_size when inlining between compilation units
Validate indices of param_ ops and require checkarity before param_*
Fix tautological comprison; snprintf returns an int, not a size_t
Fix tell for files that haven't been read from
Don't allow zero alignment in P6opaque storage spec
Index check lexicals when reading static flags
Add Decoder REPR and a number of ops that provide access to VM-backed streaming decoding
Don't segfault when serializing an uncomposed p6opaque
Don't read_int into a size_t which is unsigned
Never leak sym_name from nativecall_build
Fix a couple of potential leaks in heap snapshots
Kick arg_ and argconst_ ops from the correct basic block when inlining
Use HASH_FIND_CACHE instead of HASH_FIND in MVMHash
Correct wording of named arguments error
Bounds check for hints in get_attribute and bind_attribute
Use hints for is_attribute_initialized, and null-check repr_data
Clean up various unused variables
Mark thread GC blocked while accepting a socket to prevent deadlocks
Configure.pl now has an explicit use lib "."
Fix missing finalization queue cleanup at thread exit
Mark SC used in bytecode loading as claimed to avoid keeping them around for too long
Fix an error in multi caching of named arguments that could cause lookups to fail and the cache to keep growing

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2016.08

Don't crash in P6opaque on NULL name_to_index_mapping
Fix off-by-one in grapheme iterator
Block/unblock thread for GC on semaphore wait
Mark blocked around some more lock acquisitions
Fix various cases of out-dated pointer reads on concurrency control constructs
Hold uv_sem_t at a level of indirection, so it won't move in memory
Add a flag for PIPE_MERGED_OUT_ERR; fix stdio setup for merge
Fix EOF detection when reading files from /proc and similar
Fix lost socket listen errors
Implement async cancellation completion notifications
Add some missing fact dependencies in spesh, fixing some wrong guard eliminations
Avoid use of possibly-invalidated decont facts in spesh
Remove keep_caller from MVMFrame
Correctly NULL-terminate the buffer in MVM_vm_dump_file

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2016.07

Implement a new multi-dispatch cache, structured as a tree, able to hold more entries more memory-compactly, and able to cache dispatches involving named parameters
JIT read_fhs op
Implement elems REPR function for MVMContext
Implement a BB-splitting manipulation function in the optimizer
Fix sha1 op to work with null bytes
Fix bad interaction between profiling and dead allocation elimination; the presence of allocation logging would prevent the optimization, leading to misleading profiler output results

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2016.06

Serialize the HLL role field of STables
Avoid VMNull setup memcpy/loop in specialized frame initialization
Stop caching MVMContext on a frame
Use frames directly when serializing closures, rather than having to create an MVMContext wrapper for every one
Write SC index when deserializing, repossessing, and preparing to serialize, saving a huge amount of linear scanning
Only used cached SC index if SC itself matches
Remove an unrequired memset to clear the args buffer
Inline args preparation into interpreter, and JIT it directly instead of making a call to a tiny function
Mark getlexcaller as :noinline
Don't lose handlers during multi-level inlines
Eliminate loop in P6opaque's get_boxed_ref function, decreasing cost
Implement payload throw/handler support
Implement callerlex throwing mode
Make moar-gdb.py source-able, instead of only autoloadable
Fix inlining causing wrong lexical handler lookup
Make build in dir containing space work
Allow HLL handler for unhandled lexical exception
Add debug_name to "cannot iterate X with Y REPR" message
Give "this is not a X iterator" more info, too

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2016.05

Use MSVC-provided stdint.h and inttypes.h when possible
Improved various error messages to include the debug type name
Eliminate call frame reference counts, instead using a linear call stack for frames that never become heap-referenced and using the garbage collector to manage those that do
Tune number of gen2 sized bins
Improve error reporting in P6opaque's compose function
Improved GC debugging support to catch more problems
Fix a race between serialization context resolution and garbage collection
Add a missing MVMROOT in shell/spawn
Fix segfault when trying to serialize an uncomposed P6opaque type
Update the build system to autodetect system provided libs
Add missing rooting, since the instrumentation level barrier may allocate
Fix cleanup of temp roots at thread exit
Add missing rooting of exception message in die
Fix CUnion layout computation GC issues
Fix data race in clearing of "in inter-gen set" flag
Various improvements and fixes to the spesh_graph tool
Add missing optimization of decont_s and decont_u ops
Eliminate duplicate MVMContext creation code
Fix full cleanup crash: the NFG uses the FSA, so have to destroy NFG first
Close dynvar log filehandle in instance destroy
Clean up cross-thread write logging mutex
Free debug names in STables
Free the string_heap_fast_table in CompUnit bodies
Free permroot descriptions
Free thread's finalization queue in tc destruction
Add docs about MVMROOT
Fix crash when GCing an ended thread
Implement loadbytecodebuffer and loadbytecodefh ops
Speed up initialization of non-specialized frames
Use varints to make serialization of various integers more compact, reducing size of compiled output
Ensure we always produce at least one snapshot when heap profiling
Remove debug output when taking heap snapshots

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2016.04

Implement heap snapshots support, exposed through the profiling API
Don't mark tc->cur_frame twice during GC
Move thread object mark into thread root mark, removing a special case in the main collector
Add API for adding a permanent root together with a description
Mark thread blocked for GC when doing synchronous reads
Make MVM_bigint_from_num jit-friendly
JIT coerce_nI as a call to bigint_from_num
Set debug_name on a few more built-in types
Add REPR API for getting unmanaged size, implement it for many REPRs
Fix compile on FreeBSD 9
Handle single-char build directory names by changing capture to lookahead
Fix performance of reading very long lines
Fix utf8-c8 decode crash caused by off-by-1
Fix a full vs. partial collection detection bug
Factor unmanaged size into promoted bytes.
Enhance scheme for deciding when to do a full collect
Bail out if HLL name string index is invalid in bytecode unpack
Don't try to set flags beyond num_lexicals when reading in call frames
Adjust byte count when UTF-16 BOM marker consumed
Fix buffer overrun in utf8-c8 decoding
Initialize object registers with VMNull when allocating frames, to avoid a number of possible segfaults
Fix incorrect boolification of "" under mode MODE_UNBOX_STR_NOT_EMPTY_OR_ZERO
Utilize debug_name in nativecall error messages

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2016.03

Fix the build when not bundling libtommath
Updates to moar-gdb.py (MoarVM GDB plug-in)
Add serialize and deserialize to CPointer REPR
Don't do cross-HLL inlining
Fix missing call optimization/inlining of non-multis in some cases
Remove dangerous/broken usecapture optimization, fixing a big memory leak
Lazily decode the string heap, improving startup time and reducing memory
JIT the atposref_* ops
All the ref ops now properly set up facts in spesh
Fix dyncall on raspberrypi for calls > 4 params
Don't allocate a thread's second GC semi-space until needed
Don't keep an MVMStaticFrame array in MVMCompUnit, saving memory
Fix primary composite table generation, in turn fixing a SEGV
Measure slurpy param and param autoboxing allocations in the profiler
Implement native descriptor introspection for pipes
Further support for function pointers in native calling
Add debug_name field to STable struct and setdebugtypename, to allow easier debugging and analysis
Get directory listing in utf8-c8 encoding
Fix JIT compiler bug in string le/ge ops
Handle nonblocking stdout properly for --dump
Fix linelocs buffer overflow in bytecode dumping
Include type info of wval/wval_wide referenced objects in spesh log
Don't keep around barely-used bytecode maps, saving memory
Only allocate instrumentation state if needed, saving memory
Boost size of the multi-dispatch cache

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2016.02

Numerous fixes for places where --full-cleanup leaked
Free per-thread NFA evaluation memory and lexotic cache
Free SC root objects and dependencies array when freeing SC
Free arg_names when interning callsites
Free deserialization work index lists
Clean up decode stream separators on handles
Don't leak a replaced boolification spec
Fully clean up callsite re-use hash in assembler
Fix leak involving inlining handlers
Fix a couple of leaks when decoding strings
JITted calls to functions with MVMRegister argument don't want float calling conventions
Fix leak in type parameterization.
Don't create partly-initialized callsites in nativecall callback handlers
Check for NULL in exception payload and return VMNull in getexpayload
Fix bug for inlined structures in strutures in nativecall code
Fix structure size calculation when other structures are inlined
Plug memory leak when shelling out without capturing
Fix leak on out-of-bounds multi-dim access
Make sure unused continuation tags get freed

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2016.01

Assorted code cleanups (unreachable code, duplicated includes, etc.)
Various update to MacPorts portfile and instructions
Only optimize istrue to unbox_i when known concrete
Bump libuv to 1.8
Add submodule sync before update in Configure.pl
Suggest build-essential if no gcc
Various fixes/updates to graph_spesh.p6
Don't install sha1 and tinymt headers; they're only used internally
Only install msinttypes on MS platform
Fix a gc bug in string concatenation
Add subsecond file time ops stat_time and lstat_time
Fix stat CREATETIME return value
Note graphs_s will be deprecated; dupe of chars
Re-order ops in interp.c to match oplist
Add compile-time platform check for JIT support, to handle universal binaries

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2015.12

Allow the backlog arg for socket listening to be set
Resize buffers as needed when taking a UTF-16 substring
Context-captured frames should remember caller
Re-use MVM_frame_context_wrapper for ctx op, to reduce code duplication
Fix bug with dynvar lookups when we fall out of JITted code
Clean up callsites in comp unit objects
Clean up interned callsites on interpreter shutdown
Clean up memory allocated by FSA
Copy callsites when inlining
Cleanup Unicode property lookups on shutdown
When async streams are done, emit sequence number but no data
Force SC initialization to allocate in gen2, fixing a deadlock
Add a sanity check for gen2 allocation flag
Allow NativeRef to spesh assign_i and decont_i
Implement sp_deref_bind/get_i64/n in the JIT
Handle "is rw" pointers in native routines
Teach our guard op generator about NativeRef
Fix ordbaseat interaction with synthetics, and end of string semantics
make ordfirst and ordat consistent with ordbaseat
Add casts to resolve type warnings
Add UBSAN support to Configure.pl
Support native references to multi-dimensional indexes
Implement fileno_fh op
Implement async UDP sockets
Probe for Bool, and expose bool/sizet to nativecall
Implement input newline translation, and translation on output on Win32
Validate lexical types properly
Implement truncate/extend ops for sized natives
Init cd->arg_flags so callsites_equal wont complain
Avoid memcpy(x, NULL, 0) in spesh
Ops to introspect type bits/unsignedness
Disable unaligned reads under UBSAN
Align bytecode sections to 8 bytes
Dump "known to be RW container" flag to speshlog
Add missing unsigned operand types; clean up unsigned int ops
Add box unsigned to REPR boxing API
A handful of extra unsigned int related ops
Teach assembler about unsigneds
JIT captureposprimspec, sized getlexref_, captureposelems, capturehasnameds
JIT jit eof_fh, readline[chomp]fh, replace, gethllsym, objprimbits, sayfhs
JIT typeparameters, typeparameterized, typeparameterat
Coercion between num and unsigned int
Support boxing unsigneds in P6int REPR.
Recognize unsigned extop operands
Cheating native ref ops for unsigneds
Somewhat cheating unsigned parameter ops.
Kick out remaining unused arg_*/argconst_* ops after inlining
Fix bug that made Win32 throw on deleting nonexistent files

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2015.11

Fix const warnings about pointers to Unicode case table
Elide a few key-values from profiler data for default values
All Latin-1 controls are normalization terminators
NFG now uses Unicode Grapheme Cluster algorithm; "\r\n" is now one grapheme
Fix a canonical composition bug
Fix SEGV on nqp::chars on a null string.
Support multiple line separators on I/O handles
Support multi-grapheme line separators on I/O handles
Include \r\n synthetic in default line separators
Serialization writes string offsets as 2 bytes if possible
Used varints in a few more places in the serialization format
Serialize the STable mode flags in a single byte
Serialize the STABLE boolification_spec mode in 1 byte
Serialize the container and invocation spec flag bits with the bool spec
Implement readlinechomp_fh op, for reading lines without line ending
Fix moar build on DragonFly BSD
Fix join NFG bug when separator is empty
Improve normalizer performance on paths needing canonical combining class
Boost number of fixed size allocation bins, to handle more allocations
Fix encoding/decoding \r\n grapheme in all encodings
Make radix ops not blow up over synthetics
Fix normalizer to never re-normalize what was already considered
Encoders now throw exceptions on unencodeable characters by default
Allow specifying a replacement string for unencodeable characters
New UTF-8 Clean-8bit encoding for strings we exchange with the OS
Make escape handle \r\n properly
Handle files where stat falseley reports 0 bytes size
Provide a way for NFA to be given synthetics, not just codepoints
Teach NFA about ignoremark charrange case
Make MVMMultiCache container aware, including spesh/JIT gurd updates
isrwcont can now be jit-compiled
We can spesh isrwcont into a const now
Document ASAN_OPTIONS
Fix possible SEGV in getlex and bindlex when walking scopes
Release mutex in MVM_load_bytecode on exception
Allow named flattening args to show up amongst named args in callsites
Make later named args that are flattened in override earlier ones
Override setjmp to two-argument version on mingw64
fix a callsite memory leak
Fix ordfist/ordat JIT
JIT bigint ops or, and, xor, brshift, blshift and bnot
JIT hintfor op
Fix native call struct size calculation bug
Implement istty_fh op

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2015.10

Profiling: fix data collection when exiting
Profiling: improve timing calculation
NFG: Strip BOM from UTF-8
NFG: Implement casefolding
NFG: handle SpecialCasing
JIT: fix devirtualized REPR ops; devirt more ops
JIT: improve logging
Misc: Improve handling of state when spawning child processes
Code: Throw better exceptions in several cases
Code: linting, consting, avoid segfaults, etc.

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2015.09

Fix write to null handle on async socket
Add C++ support to native calling functionality
Make thread join force a GC run, preventing start/join loops eating memory
Remove more config and generated files in distclean target
Add MVM_CROSS_THREAD_WRITE_LOG to usage message
Try to get PC on valid instruction for cross thread write logging
JIT continuationreset and continuationcontrol
JIT string comparison ops
Don't devirtualize push_n or unshift_n for now
Async sockets: handle close,close and close,write
Differeniate when nativecasting to intN/uintN
Fix data race in frame reference count handling
Make findcclass and findnotcclass return one past end of string on non-match
Fix buffer overrun in assembler for labelled exception handlers
Free STables in a safer place, fixing a parallel finalization data race
Fix alignment of inlined structs/unions

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2015.08

Removed multiple internal data races
Add ctxcode op to get the code object of a context
Inlining in spesh will now check post-optimization size of code
Use a binary search in unicode block lookup
Unicode database file now compilable with newer MSVC
Lots of fixes for problems reported by linter software
Support for parsing Unicode numbers
Some potential segfaults fixed
New control exceptions "await", "emit" and "done"
Trying to unbox a bigint larger than 64 bit now throws
Fix "merge facts at phi" opt in spesh forgetting the first argument
Many memory leaks fixed
Properly close stdin handle when an async process dies
Async processes now have a "ready" callback
Sleep API now split into sleep and nanosleep

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2015.07

Support for multi-dimensional arrays
Improved support for pipes
Updated to Unicode 8
Die when we try to accept() or read() outside an originating thread (used to silently not work)
Instrumentation for findings writes without locks to objects originating from another thread
The profiler will now also show natively called functions
Support for libffi as an alternative to dyncall
exists_pos is no longer part of the REPR API
Accessing an object's HOW is now part of the API
libuv will now autoquote cmdline arguments on windows
Fixed some code object related ops that could segfault
New openpipe implementation that allows to read from and write to stdin/stdout/stderr
spesh will now track facts across BB nodes even through PHI
Fixed numerous memory leaks when C strings were included in exceptions
Implemented "free at next safepoint" mechanism for safely freeing memory from internal data structures in a threaded context, thus fixing NFG table growth in multi-threaded applications
Fix compile on FreeBSD 8.4 and probably earlier by detecting gcc
Fixes for build repeatability
Optimization of can op fixed and fully enabled
Fix async process handle closing
Numerous warning cleanups for various compilers

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2015.06

No longer use up a full core in some async situations.
Errors from nativecall include dlerror() output for clarity.
More verbose and aligned output in MVM_SPESH_LOG.
Several ops added to the jit.
Throwing and resuming ops for exceptions supported in the jit.
More places now go through the Int cache.
Support for str attributes in CUnion and CStruct.
Non-characters now correctly considered valid for UTF-8 encoding.
Fix exception handler resolution bug.
Introduced MVM_SPESH_NODELAY to set spesh thresholds very low.
Support for building with gmake and gcc on windows.
Support for GNU/kFreeBSD.

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2015.05

Add missing C prototype for MVM_string_windows1252_decodestream
Fix uniname out of range error reporting.
Fix SSA crash when huge number of basic blocks.
Implement normalization buffer grwoth handling.
Add missing frees on invalid UTF-8 decoding.
Integrate NFG with UTF-16 non-stream decode.
Remove linenoise/readline
Give a decode stream a normalizer.
Further integrate normalizer with decode stream.
Fix chr for our brave new NFG world.
Update macportfile to 2015.04 release
Make \n a "normalization terminator".
Ensure concatenation is closed under NFG.
Don't leak synthetics from ord.
Integrate NFG with UTF-8 non-stream decode.
Implement NFG for decode stream case of UTF-8.
Fix use-after-free in open file error reporting.
Display exactly what thread ID was passed.
Release allocated resources before returning
Free resources for **pieces before returning
Release 'signature' before returning from unmarshal_callback()
Free leaked resource buffer before returning
Remove fragile assumption about buffer size.
Fix UTF-8 encoder to handle NFG.
More robust NULL string checking.
Ensure we get NULL-terminated strings if needed.
Bytecode file stores Latin-1 when possible.
Optimize temporary root handling.
Cache and mark the backend config hash.
Dual-purpose comp unit string heap as SC one.
Re-order bytecode read struct to be smaller.
Don't repeatedly calculate limit in bytecode read.
Toss some bits of ut_hash we don't use.
Toss hash bloom test bits we don't use.
Optimize at level 3 by default.
Toss even more hash bits we don't use.
Re-implement MVMIter on hashes using buckets.
Toss HASH_FSCK addition order check.
Use a simpler "deleting the last item" check.
Eliminate double-linked-list in hashes.
Fix use-after-free if hash iter block frees nodes.
Be consistent with paren-ing in macro.
Eliminate a single-use macro.
Correct head replacement logic.
Re-implement simple say/print using MoarVM I/O.
Thread ID handling cleanup.
Fix an ABA bug in the fixed size allocator.
At least do a spinlock rather than a mutex.
Factor out code to avoid a "magic value" all over.
Concurrency control on multi-cache additions.
Show line numbers for deopt annotations
Give every BB in the spesh log a line number
Devirtualize bindkey and bindpos ops
Implement MVM_op_elems for devirtualization
Implement getattr_* and getattrs_* devirtualization
Implement pop_* and shift_* for devirt
Implement bindattr and bindattrs ops for devirt
Fix a control flow thinko for logging
When failing from consume_reprop, do it loudly
No longer bail from many unhandled repr ops
Devirtualize setelemspos, existspos and existskey
Implement ordbaseat and eqatim_s ops for ignoremark
Silence warnings about pointer type mismatch
Increase stack space for call arguments.
More compact jit for add, sub, bor, band and bxor
Add lib install dir to rpath
Display "Inlined" flag in the spesh log
Add a missing barrier in multi-dispatch cache
Tweak error reporting of wrong outer frame
Include cuuid of invokee in error message.
Remove the frame pool
Spesh dump shows little words for fact flags
Spesh dump coderefs as filename + line number and "(closure)"
Handle LTM for ignorecase+ignoremark
Fix ref-count management of deserialized contexts.
Provide a "never repossess this" mechanism.
Fix a GC marking bug in parametric type setup.
Implement exception object creation from category.
Emit add, sub, bor, band, bxor with constant if possible
Kill duplicate getspeshslot ins for the same register
Formally bump minimum bytecode version to 5
JIT - check if constant value fits in 32 bit
Fix format type error in JIT logging
Add MVM_oops() function to panic with backtrace, used in spesh and JIT
Add op for disclaiming all objects of an serialization context (SC)
Check that owning object wasn't disclaimed by an SC.
Add support for CUnion repr to use with NativeCall
Add support for inlined CStructs and CUnions

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2015.04

Re-enabled lazy deserialization, decreasing Rakudo startup time and memory
Fix a possible buffer-overrun in MVMArray's existspos
Fix for ARMv5
Configure: add an option --ar
Mark existspos op as pure to allow better optimization
Tweak dynamic optimization and OSR thresholds to tune startup performance
Implement bounded serialization of parameterized types
Include file names in some deserialization errors
Clean up some unused functions and variables
Add attribute((format())) where appropriate
Correct some format strings
Allow nativecast from VMArray e.g. Blob/Buf
Output callsites in spesh log
Implement unsigned int types for native calls
Upgrade Unicode DB to Unicode 7.0
Include module that asked for stale dependency in error message
Handle 'is rw' params in native calls
Make some hot functions at startup time as always being inlined
Fix exception message when utf8 string is invalid from the start
Implement NFC/NFD/NFKC/NFKD Unicode normalization algorithms
Add op to normalize buffers of codepoints
Remove unused Unicode database script
Support cross-compiling with computed goto
Refactor pthread_yield detection
Add op "getcodelocation"; gets file and line of a MVMCode
Tweak istrue_s; every non-empty string is true now
Bump minimum serialization format version; remove code for old versions
Implement a more efficient varint serialization format
Remove the vestigial serialized 0 that used to be v-table length
Re-order struct MVMCollectable to slightly reduce L1 cache misses
Store the serialized reference type discriminator in 1 byte, not 2
Add missing IS_CONCRETE checks in serialization
Make unbox int/num/str functions test IS_CONCRETE always
Fix conflict with splice from bits/fcntl-linux.h
Fix missing frees of bytecode annotations
Serialize object headers more compactly
Serialize object references more compactly
Split codepoint iterator from grapheme iterator
Implement grapheme normalization algorithm (aka. "NFG")
Implement encoding of grapheme-level strings to bytes
Implement retrieving codepoints in different normal forms from NFG strings
Fake POSIX exit codes consequently on windows
Remove extra call to uv_run when closing a pipe
Loop over waitpid to get correct exit code for closed pipe
Basic implementation of case change with NFG
Make character class check on NFG synthetic uses base codepoint
Make Unicode property checks on NFG synthetics use base codepoint

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2015.03

Add a macports Portfile
Implement nativecallsizeof op
Rewrite MVM_file_copy so it handles files larger than 2GB
Mostly quiet MSVC warnings when compiling the JIT emitter
Chase libuv thread ID API change, and fix thread ID lookup on Windows
Teach profiler about native ref taking ops
Fix allocating an empty (no members) CStruct
JIT compilation for native reference related operations
Implement native register references
Support references to sized int and num lexicals
Fix missing GC rooting of callback object arguments
Fix big endian bug in if/unless optimization
Simplify known value handling in the optimizer
Make graph_spesh.p6 also show the dominance tree
Fix bugs in string_index_from_end
Bump dyncall revision
Fix big endian bug in the P6bigint REPR
Fix system detection in triple for cross compilation
Stop fiddling with slashes in openpipe on Windows
Make index('foo','') return 0, and handle null needle when start > 0
Type specialization for the bindattrs_s op
Optimize out many set instructions
Add helper functions so embedders won't need to poke into MVMInstance so much
Use CFLAGS, CPPFLAGS, and LDFLAGS from the environment, if set
Re-use allocated PHI node descriptors, to reduce allocations during optimization
Improve optimizer memory allocation block scheme to decrease waste
Allow STable changes in repossessed objects
Fix JIT of bindpos_n
Fix bogus pointer casts and libc name clashes to fix MinGW build
Fix a bug in iter optimization
Better armv6 and v7 detection

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2015.02

Fix memory leak in P6bigint
-O2 is now the default optimization level in clang/GCC
Improve performance of SSA form calculation
Dyncall dependency is now at version 0.9
Better error messages in NativeCall
CArrays are now zero-filled by default
MVMArrays can now be casted and passed to native functions
Addition of readlink and lstat ops, and general symlink compatibility
libuv dependency is now at version 1.0.0
P6int and P6num can now be "C sized"
Implemented native references to lexicals, attributes, and array elements
Added native_ref container specification
Added iscont_[ins] and decont_[ins] ops
Make multi-dispatch cache aware of native containers
Mixin prefix test in P6opaque now disregards attribute-free parents
Fix buffer overflow when trying to inline calls with many args
Handle argconst_[ins] instructions in inlining
Fix a crash from trying to unbox type objects passed to native args
Decrement usage counts in some optimizations, killing more dead code

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2015.01

Decrement usage of class type for setattr ops, enabling wval elimination
Add missing concreteness checks in concurrency ops
First operand of sp_guard* is r(obj) not int16
Make ReentrantMutex not prevent serialization
Fix various ops that could return real NULL pointers and cause SEGVs
Spesh gethow (can be spesh slot lookup)
Start documenting the parametric 6model design
Implement parametric 6model ops
Avoid calling MVM_callsite_get_common twice in many situations
Use labs instead of abs to avoid truncation on 64-bit values
Fix signed/unsigned warnings in bytecode handling
Big signed/unsigned cleanup in string/buffer handling
Fix leak when join returns early
Fix missing free in args spesh
Tweak fixed size alloc configuration for a small memory saving
Improve missing SC code ref error reporting
Start integrating 6model parametrics with serialization
Don't delete BBs with handler annotations
Handle assigning Str to a CArray[Str] slot (to assign NULL)
Simplify and optimize varint serialization/deserialization

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2014.12

Various warnings produced by clang fixed
Fixed ceil_n and floor_n to return n64, not i64
Pass -faddress-sanitizer when --asan is set
Eliminate various unneeded set instructions
Properly update successors for non-passed optional parameters
Optimize can operations
When bindlex fails, we should report "bindlex", not "getlex"
Mark takeclosure as an popular allocating op in the profiler
Expose callsite interning for extops
JIT randscale_n
Dump lexical names when dumping spesh graph
Only look at MVM_NFA_DEB environment variable once, not every NFA run
Implement longest literal tie-breaker in NFA
JIT cmp_i
JIT isnanorinf
JIT cmp_n
Handle sometimes-allocating ops in the profiler
JIT invokewithcapture
Count allocs in spesh'd/jitted frames separately in profiler
Turn a bunch of can_s ops into can ops instead.
Give graph_spesh.p6 a little introduction text
Avoid a pointer getting outdated on the stack in environment access
Replace quicksort with insertion sort in NFA fate sorting
Fix MVMROOT of a non-collectable in state variable handling
Detect useless SUBRULE edges in NFA, and trap epsilons to 0
Mark callback Str parameters as not to be freed
Record size of gen2_roots list after each GC when profiling
Do not call srand() if not using rand()
Don't use filename to determine EOFness
Allow passing of length = -1 to MVM_string_utf16_encode_substr
Don't resolve symlinks by hand
Avoid some duplicate work in inter-gen root processing
Fix a use-after-free in openpipe, which occurred quite often on OSX
Don't include PHIs when rendering spesh graph diagrams

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2014.11

JIT multicacheadd, multicachefind, radix_I, bindpos_n, bindpos_s, escape, blshift_i, brshift_i, write_fhs, cmp_I
Optimize out a bunch of unnecessary "set" instructions
Turn a bunch of const_s + findmeth_s into cheaper findmeth
Implement nqp::closefh_i which returns the exit code of a pipe
Allow nativecasting a CStruct to another CStruct
Fix temp register usage in optimize_istrue_isfalse
Fix a regression by eagerly deserializing stables/objects
Added tool to colorize registers in spesh logs and another to turn spesh logs into a data-flow and control-flow graph.
Let update_ops.p6 also write a perl6 module with ops data
Add --bindir, --libdir and --mastdir as Configure options
Create pkgconfig file as pkgconfig/moar.pc

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2014.10

Added op nativecallglobal
Update DynASM
[Configure] document --asan option, Implement --has-linenoise, --has-dyncall and --has-dynasm
Build and install libatomic_ops conditionally
Improve usage, include environment variables.
Document bytecode directory environment flag
Add beginnings of a manual page in docs/moar.pod
Don't mark inlined locals for logging frames.
Fix crash upon trying to clone a type object.
Fix concreteness test for the reprconv
Fix handling of command line args on Win32
Build with jit by default, add --no-jit option
Prettify --enable-jit obsoletion notice
JIT savecapture, usecapture, getobjsc, sin, cos, tan, asin, acos, atan. atan2_n, time_n, pow_n and sqrt_n, nativecallinvoke and numeric negation
Added MVM_calloc function
Make "cannot invoke" errors consistent.
Improve err msg about oob in io_read_bytes
Optimize out non-interned static callsites
Attempt interning the callsites we use in nativecall callbacks
Implement set_separator for syncfiles
Panic if MVM_platform_alloc_pages failed on posix system

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2014.09

Add an instrumenting profiler, recording profiling information at routine level and tracking use of specialized/JITted code and inlinings
Support profiling allocations and GC runs
Use arc4random on platforms that support it
Fix numerous warnings
JIT more big integer ops: div_I, div_In, mod_I, gcd_I, coerce_In, and bool_I
Specialization and JIT-compilation of various iteration-related instructions
JIT curcode and getcodeobj
Include filename in spesh log
Fix negative division in JIT
Mark getlexouter as not inlinable
Add mechanism for objects to get a persistent ID, used in Perl 6's .WHICH
Fix regression on PowerPC
Add missing SC write barrier to MVM_repr_bind_attr_*
JIT getattrs_* and bindattrs_* ops
JIT more string operations: indexat, findcclass, and findnotcclass
Add JIT logging of inlines
Cleanly panic if allocation fails, rather than crashing
Fix the build on ARM 32 + gcc 4.8.2
Better style on arg count errors
Avoid unaligned reads on ARMv7
Conditionally set include dirs and install rules (e.g. --has-libuv)
Add type finalizer support to the GC
Update libuv from 0.11.18 to 0.11.29
Base full collections off promotion rate, often reducing full collections
Add force_gc instruction
Set up travis continuous integration
Fix mis-use of libuv: we are not supposed to open a child's pipe to our stdin
Fix pointer to pointer native cast
conditionally use/install our libtommath headers
Don't try to serialize file handles

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2014.08

Add support for JIT compilation on x64 (when configured with --enable-jit); supports basic arithmetic and logical operations, branching, method finding, invocation with argument passing, basic parameter handling, boxing/unboxing, attribute access, array and hash access, some big integer operations, some string operations, type checks, and more. Integrated with deoptimization, OSR (On Stack Replacement), extension ops, and exception handling.
Specialize various cases of istrue/isfalse to remove some indirections
Add charrange handling to the NFA evaluator
Update Unicode database generation script with latest string API
Add char name lookup aliases (LF, FF, CR and NEL) as line separators
Update moar-gdb.py for new structure of MVMString
Add Configure support for ASAN
Fix multi cache bug for no positionals, some nameds case
Make spesh dump show numeric literals and lexicals properly
Assorted OSR fixes for frames that deoptimized, then hit OSR points
Fix a number of SSA/dominance memory leaks
Fix memory leak in inlining
Make dead code elimination not cause unrequired guards to be kept
Add an API for extops to be involved in fact discovery and specialization
Add type and no-container facts for bigint ops
Support inlining of frames with handlers
Enable inlining of lexotic (return) handlers
Allow addition of temporary registers when specializing
Specialize boxing and unboxing of args, both named and positional
Avoid repeatedly allocating memory for NFAs
Cache frame index in MAST assembly, to avoid a linear scan
Fix various dynamic variable and inlining interaction bugs
Add a dynamic variable lookup cache
Devirtualize serialization read/write functions
Make full frame deserialization lazy, reducing memory and startup time
Handle static lexical values far more efficiently
Identify MAST nodes in assembler by exact type, cheapening assembly
Specialize smart stringify/numify into simpler ops in some cases
MAST::Label works on identify now, not name matching
Make "allocate in gen2" mode reentrant
Support lazy deserialization of static lexical values, method caches, and meta-objects
Remove some unused fields from STable
Optimize some simple control exceptions into gotos
Don't redo dead instruction elim on inlinees
Make sure inlined args are always marked as used, fixing a bug
Add an int -> str cache for 0..^64
Add asynchronous process spawning, I/O, and killing
Check dll cache before searching through libpath, saving many stats
Make a better guess at MAST assembly output buffer sizes
Add a mechanism for debugging strand issues
Fix bug in string repeat of an already repeated strand
Complain properly about missing late-bound methods
Clear special return data more eagerly, fixing a double-free
Refactor get_storage_spec
Fix P6bigint unbox portability bug

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2014.07

Make default file mode 0666
Auto-detect computed goto support and enable it when available
Implement On Stack Replacement for hot loops
Fix and enable isconcrete optimization
Use const_i64_16 in spesh-produced code for more compact output
Fix bug where [work|env]_alloc were not cleared, leading to mis-frees
Support inlining frames that use with extops
Add missing decl in header to quiet warnings
Fix logical bug in fixed-size-allocator
Fix capturelex race condition
Add missing MVMROOT in ConditionVariable setup
Don't share cached Lexotics over threads
Re-order code to avoid race on event loop startup
Add a bunch of missing MVMROOTing in asyncsocket
Make exit get out quickly
Close async sockets on event loop thread to avoid corruption
Make --no-optimize and --no-debug work in Configure
Implement (de)serializing of Array[uint]
Specialize getlexperinvtype_o (enables better roles optimization)
Allow pointer math using CPointer repr
Fix typo in CArray.elems error message
Add a cast to get rid of a warning in nativecall.c
Fix merging of inline table entries
Eliminate unused guard instructions at end of specialization
Update uthash to latest version
Correct computation of lexical vivifications
Add nativecallcast operation
Fix use-after-free bug with thread entry callsite
Cope with cross-deopt-point usage analysis
Give ContainerSpec a spesh function, use it for decont
Make various spesh things available publicly, for VM extensions
Significantly overhaul the strings code, fixing many performance issues
Optimize find_cclass and find_not_cclass

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2014.06

Correct closure semantics of native callbacks
Add ops for 2-possibility named parameter handling.
Start storing named argument names in callsite objects
Start interning callsites with named arguments
Specializer can turn named arg resolution to indexed lookups
Specializer can optimize named args
Specializer adds facts and guards for named args
Implement cancelling listening on a socket
Implement async bytes reads from sockets
Optimize invocation by pre-selecting callee spesh cand if possible
Pick a spesh threshold by bytecode size rather than a constant
Mark ops that are not suitable for inlining
Add an operand type for spesh slots
Implement basic inlining
Implement deoptimization of inlined calls, which uninlines
Make interp trace output more useful; include op
Have invoke/return end a basic block
Add a thread-safe fixed-size allocator
Use fixed-size allocator for frames/work/env.
Use fixed-size allocator for hash entries
Use fixed-size allocator for named used flags.
Don't refuse to spesh if we've a slurpy positional
Can do coerce_in of literals at spesh-time
Fix spesh frame handler end annotation motion in instruction deletion
Fix spesh fact marking bug

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2014.05

Add a libuv-managed event loop thread
Implement timers
Implement nqp::signal; support various signals
Add async read/write sections to IO op table
Implement async socket listen/connect
Implement async read/write ops
Implement chars case of async socket reads
Fix HLL mapping of type objects
Implement file watchers
Add infrastructure for cancellation
Implement cancellation of timers
stat the target of a symlink when we query for filesize
Dump deopt instruction spesh annotations
stat file descriptor in eof() when filename is unset
Serialize CStruct repr_data
Add MVMNull REPR and a singleton VMNull instance
Teach various parts of the VM about VMNull
Lazily allocate lexical containers
Optimize frame allocation
Remove BOM-discarding code from MVM_string_utf8_decode()
MVM_string_utf8_decode() should take a MVMuint8 *, not a char *
P6opaque now handles C structure member alignment, just like CStruct does
Steal P5's unlink magic for Windows; clear readonly flag when needed
Add lexical lookup lifetime hinting ops
Re-organize spesh to have log/specialize phases
Use spesh logging to emit guards into code
getlexstatic_o optimization in spesh
Better error on handler fixup failure in spesh
Implement op execname, which stores the path of the runner
Implement all vs. one deopt
Fix moving of handler annotations
Basic dumping of facts in spesh
Cope with annotations being moved to a phi
Make sure we don't clobber block handler setting in spesh
Iterate to fixed point when finding unused instructions, giving better results
Pre-invalidate all deopt target addresses, to catch fixup failures
Optimize simple calls and multi-dispatch at spesh time if possible
Add Makefile rules to generate pre-processed source
Add Makefile rules to generate assembler
Support for ARMv6. Don't try to read unaligned doubles or long longs
Ensure that MVMCompUnit can correctly free data_start
MVMStaticFrame now supports bytecode pointing to a private malloc()ed copy.
Do proper endian correction on bytecode
Add Ops for 32/16 bit 64 int literals
isnonnull op for use in spesh
turn islist/... into either isnonnull or a literal 0.
Teach spesh_diff.p6 about the new output of spesh dump
Teach spesh_diff.p6 about Facts
improve run time performance of spesh_diff.p6
Avoid using an uninitialized variable.
Harvest strings in facts discovery process
Specialise can and can_s ops into const_i64 when possible
Change the way we store SCs in object headers to allow faster lookups of indexes
Fix bigint bitops
Ensure spesh_alloc aligns on platforms needing it
Include SC identifiers in bytecode dump
Make dump_backtrace more widely available.
Merge the bodies of MVM_sc_get_{obj,stable}sc and set_
Change serialization context indexes to be unsigned. Use ~0 as a sentinel.
Add inline functions to wrap accesses to sc.sc_idx and sc.idx
Add struct MVMSerializationIndex to hold large STable indexes
Free any allocated MVMSerializationIndex structs
Add a probe to determine the pointer size
Conditionally compile the MVMSerializationIndex for 32 bit platforms only
Allocate a MVMSerializationIndex if sc_idx would overflow in the union
Specialize getattr_[ins] on P6opaque
Fix bigint upgrade check
Optimize object attribute accesses in spesh
Spesh indirect form of attr ops with known names
Rakudo Bug #121273 fixed - losing a 0 from end of exponent
Re-arrange various structures for memory saving
Add handler infrastructure for supporting labeled loop exceptions

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2014.04

Brought thread ops in line with nqp:: op API
No longer inherit caller chain when starting a new thread
Fix a range of parallel garbage collection bugs
Block/unblock threads for GC while sleeping
Implement reentrant mutexes
Implemented semaphores
Implemented concurrent blocking queue support
Implement condition variables
Main thread has ID 1 now
Move nursery corruption check to after inter-thread work passing
Fix a gen2roots compaction optimization bug
Add flag '--has-sha' option to Configure to use a system SHA-1 library
GC orchestration cleanups and extra logging
Compact the gen2 overflows list
Fix decodestream_bytes_to_buf eating too much data
Added some missing MVMROOTs on config setup
Removed duplicate gen2 root cleanup call
Small cleanups to serialization
Avoid an extra level of function call in various REPR allocate functions
Add locking for IO handles
Add the Configure flags '--has-libuv and '--has-libatomic_ops'
Shortcut shr when we have a small lhs but rhs is >= 32
Add logic to turn bytecode into SSA form, and from SSA back to bytecode
Added infrastructure for "spesh ops", to use in type-specialized bytecode
Start interning positional callsites
Keep a rough call count per static frame
Add bytecdoe specialization infrastructure
Optimize simple positional arg fetch in specialized bytecode
Resolve methods at specialization time when type is known
Add a monomorphic method cache
If MVM_SPESH_LOG is in env, log spesh work to it
Turn known-unrequired decont into set
Make MVM_SPESH_DISABLE env var disable spesh
Add :pure annotations to side-effect-free ops; eliminate dead code
Add a tool for splitting and diffing spesh log output
Add setmultispec mechanism for optimizing away only-star proto
Optimize optional positoin arguments in bytecode specialization
Optimize out istype for a spesh-time-known value or type
Optimize if_i and unless_i for known values
Corrected atan2 op signature.
Implement de-optimization on mixins
Don't lose HLL owner during serialization
Optimize away hllize when possible
Optimize away assertparamcheck when possible
Infrastructure to allow REPRs to participate in spesh
Optimize object creation in common cases with known types
Small fixes to MVM_string_(latin1|windows1252)encodesubstr
Optimize bindattr_o on P6opaque when possible.
Change the way lexotic is handled to avoid the need for allocation
Specialize empty named slurpy args.
Add a way to flag a frame as a "thunk".
Add ctx[outer|caller]skipthunks ops.
Make backtrace generation ignore thunks.
When readline/linenoise see EOF, mark handle EOF
Set hint for invokespec and multispec, improving invocation performance
Improve the VM exit strategy, so non-app-lifetime threads are waited on
Correctly handle temp roots stack in callbacks
add sched_yield for NetBSD
Fix callsite size calculation in tweak_cs
Fix buffer overflow in UTF-16 encoding
Trigger repossession on OP(push_*)
Fake up a final entry off the end of Unicode, fixing some lookup bugs

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2014.03

Implement a fast-path for string strand flattening
Fix character lookup by name sometimes giving wrong result
Control and printable now know about Latin-1 control characters
Fix bug in Latin-1 handling
Fix and optimize various character property lookups
Implement lookup of non-boolean Unicode properties
Implement character code to name lookup
Implement lookup of enum/stringy Unicode properties
Fix memory leak of active handlers in continuations
Clear up gen2 memory at exit
Clear up frame pool at exit
Don't leak static frame instruction offsets
Fix memory leak in MVMHash
Simplified/optimized frame reference count handling in continuations
Fixed missing exception resume reference count decrement
Correct "on stack" continuation reference count handling
Add missing cleanup in MAST assembler
Fixed used named args tracking memory leak
Fixed SEGV in eof of non-file-based filehandle
Pass STDIN to subprocess in shell()
Fixed resolution of IPv6 host names
Implemented native calling
Implemented CPointer representation
Implemented CArray representation
Implemented CStruct representation
Improve GDB plug-in string usage analysis
Make GDB plug-in aware of gen2 overflows
Clean-up and optimization of many REPR allocate functions
Fixed over-eager / to \ conversion in nqp::shell on Windows
Implemented native callbacks
Correct copy size of args buffer, avoiding reading unmapped memory
Updated to new liblinenoise and re-instated usage of it
Bump dyncall to latest version
Add --has-libtommath option to Configure for using system libtommath

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2014.02

Increased precision of num => str coercion
Mechanism for per-HLL handling of method resolution errors
Gave can the same null-check semantics as findmethod
Fixed various "not found" lexical lookup semantics
Use a more efficient encoding for integers in the serialization blob
Implemented reposession conflict resolution handling for objects
Optimized GC worklist processing to avoid unrequired barriers
Added a GDB plugin to help analyse VM data structures, heap use, etc.
Zeroed memory in a few places, to avoid reading junk and quiet Valgrind
Simplified and fixed UTF-16 encoding
Implemented unsigned native integer array support
Added various missing write barriers on STables
Added openpipe functionality, to support qx/qqx in Perl 6
Corrected accidental and potentially explosive use of REPR(...) on STables
Switched to using flag bits to mark liveness in GC
GC forwarder pointer used in nursery now overwrites existing object body, saving 4 or 8 bytes on every collectable object
Added various GC sanity checking asserts to aid debugging
Encapsulated all serialization context accesses
Defined NDEBUG in optimized builds
P6bigint no longer uses libtommath for integers fitting within 32 bits
Optimized serialization of P6bigints fitting within 32 bits
Implemented link and symlink
Fixed mod_n op's behavior on negatives
Implemented floating point fallback case of the pow_I op
Fixed srand op to also control rand_I
Initialize the random seed at startup
Properly clean up active handlers that we unwind over
Radix parsing now returns an array of integers, not floating point
Huge refactor of I/O, fixing many bugs and leading to cleaner code
Proper handling of characters split over byte buffer boundaries in I/O
Corrected Latin-1 to be Latin-1, and added Windows-1252 encoding
Added a constant cache for boxing integers 0 through 15
Properly implemented synchronous client and server TCP socket support
Better estimate and perhaps shrink string memory for UTF-8 decode
Added probing to Configure to learn how the compiler does 'static inline'
Switched many macros over to static inline functions

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2014.01

The first official MoarVM release! Capable of running the 2014.01 release of Rakudo Perl 6, the first one with MoarVM support. (No change log for this initial release, since it's basically "all the things".)

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