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2011-11-13Merge branch 'rickard/alloc-opt/OTP-7775'Rickard Green
* rickard/alloc-opt/OTP-7775: Optimize memory allocation Conflicts: erts/aclocal.m4 erts/emulator/hipe/hipe_bif_list.m4 erts/preloaded/ebin/erl_prim_loader.beam erts/preloaded/ebin/erlang.beam erts/preloaded/ebin/init.beam erts/preloaded/ebin/otp_ring0.beam erts/preloaded/ebin/prim_file.beam erts/preloaded/ebin/prim_inet.beam erts/preloaded/ebin/prim_zip.beam erts/preloaded/ebin/zlib.beam
2011-11-13Optimize memory allocationRickard Green
A number of memory allocation optimizations have been implemented. Most optimizations reduce contention caused by synchronization between threads during allocation and deallocation of memory. Most notably: * Synchronization of memory management in scheduler specific allocator instances has been rewritten to use lock-free synchronization. * Synchronization of memory management in scheduler specific pre-allocators has been rewritten to use lock-free synchronization. * The 'mseg_alloc' memory segment allocator now use scheduler specific instances instead of one instance. Apart from reducing contention this also ensures that memory allocators always create memory segments on the local NUMA node on a NUMA system.
2011-11-10Remove exec bit from files related to: XML, make, CRicardo Catalinas Jiménez
2011-11-09Merge branch 'sverk/bif-args/OTP-9662'Sverker Eriksson
* sverk/bif-args/OTP-9662: erts,hipe: Limited support for hipe cross compilation erts-hipe: Change THE_NON_VALUE for HiPE enabled debug emulator erts-hipe: Enable debug compiled hipe-VM with lock checker erts-hipe: Rename fail_bif_interface_0 to standard_bif_interface_0 erts-hipe: Deliberate leak of native fun entries erts-hipe: Fix new trap conventions for x86, amd64 and ppc Store the trap address in p->i Store the trap arguments in the X register array erts-hipe: Make some primops use new BIF calling convention erts-hipe: Adapt generated BIF wrappers for new calling convention erts-hipe: Remove obscuring macros in generated assembler code erts-hipe: Make hipe enabled emulator compile with new BIF calls Simplify the instructions for calling BIFs Change the calling convention for BIFs Use the proper macros in all BIFs Conflicts: erts/emulator/beam/bif.h erts/emulator/beam/erl_bif_info.c
2011-11-09erts,hipe: Limited support for hipe cross compilationSverker Eriksson
Normally hipe assumes that generated native code will be executed on the same emulator as the hipe compiler is running on. This commit allows you to build a hipe "cross-compiler" for a different configured emulator (but for same architecture). Example: > cd lib/hipe > make clean > make XCOMP=yes FLAVOR=smp TYPE=debug This hipe compiler will generate code to be executed on the debug compiled smp-emulator at $ERL_TOP.
2011-11-09Merge branch 'sverk/enif_inspect-memleak/OTP-9668'Sverker Eriksson
* sverk/enif_inspect-memleak/OTP-9668: erts: Fix memory leak of enif_inspect_* on independent environment
2011-11-08Merge branch 'bjorn/create-less-garbage'Björn Gustavsson
* bjorn/create-less-garbage: Optimize filename:basename/1 to produce less garbage Optimize filename:extension/1 to produce less garbage sys.c for Unix: Undo caching of utsname in os_flavor() Pre-build the tuples returned by os:type/0 and os:version/0
2011-11-07Merge branch 'egil/fix-compiler-warnings'Björn-Egil Dahlberg
* egil/fix-compiler-warnings: erts: Remove unused variable in enif_make_binary erts: Remove debug variable in list_to_binary erts: Remove cp on exiting and trapping processes erts: Remove debug variables in erl_db erts: Remove dead code in efile_drv erts: Remove lock_check debug variables erts: Remove unused variable in ttsl_drv erts: "initialized" is only used with CHLDWTHR erts: remove debug variables in beam_bp
2011-11-07Merge branch 'ta/nif-variadic-funs'Henrik Nord
OTP-9675
2011-11-07erts: Remove unused variable in enif_make_binaryBjörn-Egil Dahlberg
2011-11-07erts: Remove debug variable in list_to_binaryBjörn-Egil Dahlberg
2011-11-07erts: Remove cp on exiting and trapping processesBjörn-Egil Dahlberg
2011-11-07erts: Remove debug variables in erl_dbBjörn-Egil Dahlberg
2011-11-07erts: Remove dead code in efile_drvBjörn-Egil Dahlberg
2011-11-07erts: Remove lock_check debug variablesBjörn-Egil Dahlberg
2011-11-07erts: Remove unused variable in ttsl_drvBjörn-Egil Dahlberg
2011-11-07erts: "initialized" is only used with CHLDWTHRBjörn-Egil Dahlberg
2011-11-07erts: remove debug variables in beam_bpBjörn-Egil Dahlberg
2011-11-07Merge branch 'bjorn/fun-improvements/OTP-9667'Björn Gustavsson
* bjorn/fun-improvements/OTP-9667: sys_pre_expand: Remove incorrect comment compiler: Eliminate use of deprecated erlang:hash/2 beam_asm: Fix broken NewIndex in fun entries beam_asm: Strenghten the calculation of Uniq for funs
2011-11-07beam_asm: Strenghten the calculation of Uniq for funsBjörn Gustavsson
Funs are identified by a triple, <Module,Uniq,Index>, where Module is the module name, Uniq is a 27 bit hash value of some intermediate representation of the code for the fun, and index is a small integer. When a fun is loaded, the triple for the fun will be compared to previously loaded funs. If all elements in the triple in the newly loaded fun are the same, the newly loaded fun will replace the previous fun. The idea is that if Uniq are the same, the code for the fun is also the same. The problem is that Uniq is only based on the intermediate representation of the fun itself. If the fun calls local functions in the same module, Uniq may remain the same even if the behavior of the fun has been changed. See http://erlang.org/pipermail/erlang-bugs/2007-June/000368.htlm for an example. As a long-term plan to fix this problem, the NewIndex and NewUniq fields was added to each fun in the R8 release (where NewUniq is the MD5 of the BEAM code for the module). Unfortunately, it turns out that the compiler does not assign unique value to NewIndex (if it isn't tested, it doesn't work), so we cannot use the <Module,NewUniq,NewIndex> triple as identification. It would be possible to use <Module,NewUniq,Index>, but that seems ugly. Therefore, fix the problem by making Uniq more unique by taking 27 bits from the MD5 for the BEAM code. That only requires a change to the compiler. Also update a test case for cover, which now fails because of the stronger Uniq calculation. (The comment in test case about why the Pid2 process survived is not correct.)
2011-11-07EEP-23: Allow variables in fun M:F/ABjörn Gustavsson
Currently, the external fun syntax "fun M:F/A" only supports literals. That is, "fun lists:reverse/1" is allowed but not "fun M:F/A". In many real-life situations, some or all of M, F, A are not known until run-time, and one is forced to either use the undocumented erlang:make_fun/3 BIF or to use a "tuple fun" (which is deprecated). EEP-23 suggests that the parser (erl_parse) should immediately transform "fun M:F/A" to "erlang:make_fun(M, F, A)". We have not followed that approach in this implementation, because we want the abstract code to mirror the source code as closely as possible, and we also consider erlang:make_fun/3 to be an implementation detail that we might want to remove in the future. Instead, we will change the abstract format for "fun M:F/A" (in a way that is not backwards compatible), and while we are at it, we will move the translation from "fun M:F/A" to "erlang:make_fun(M, F, A)" from sys_pre_expand down to the v3_core pass. We will also update the debugger and xref to use the new format. We did consider making the abstract format backward compatible if no variables were used in the fun, but decided against it. Keeping it backward compatible would mean that there would be different abstract formats for the no-variable and variable case, and tools would have to handle both formats, probably forever. Reference: http://www.erlang.org/eeps/eep-0023.html
2011-11-02beam_loader: Support external funs in the literal poolBjörn Gustavsson
A future release of the compiler might want to treat external funs as literals. Make sure that the loader can cope with an export entry being created from both an entry in the literal pool and from the export table (i.e. if an external fun refers to an exported function in the same module).
2011-11-02beam_load.c: Clarify error message when loading unsupported BEAM filesBjörn Gustavsson
Make it clear for the user what has happened and how to fix it when an attempt is made to load a BEAM file containing new instructions that the current run-time system cannot handle. Suggested-by: Thomas Lindgren
2011-11-01Merge branch 'lukas/erts/large_float_cmp/OTP-9497'Lukas Larsson
* lukas/erts/large_float_cmp/OTP-9497: Update documentation after changes in integer and float comparison Do small optimisation on platforms with 32 bit Eterm Add tests for equality checking Optimize comparison of huge floats and smaller bignums Add tests for comparing large floats and small bignums Cleanup double_to_bignum conversion code Update size of tmp cmp bignum buffer Expand tests for float and number comparison Update heauristic to work on halfword Add heauristics bignum vs float checks Optimise bugnum and small comparison Add float vs integer comparison tests Update integer and floating point number comparisons
2011-10-31erts: Fix memory leak of enif_inspect_* on independent environmentSverker Eriksson
Affects enif_inspect_iolist_as_binary() on iolists and enif_inspect_binary() on byte-unaligned binaries. Also need to allocate inspection buffers in ERTS_ALC_T_NIF for process independent environments, as we don't know when and where the environment will be freed.
2011-10-27erts: Make erl_nif.h compile with gcc on WindowsSverker Eriksson
and some added comments
2011-10-26erts-hipe: Change THE_NON_VALUE for HiPE enabled debug emulatorSverker Eriksson
This is a work-around as there are hipe BIFs that return untagged integers that may be intepreted as THE_NON_VALUE (24). Hipe bifs that return offsets as untagged integers: hipe_bs_put_utf8 hipe_bs_put_utf16be hipe_bs_put_utf16le Hipe bifs that return raw pointers: hipe_find_na_or_make_stub hipe_nonclosure_address
2011-10-26erts-hipe: Enable debug compiled hipe-VM with lock checkerSverker Eriksson
Add hipe_debug_bif_wrapper() as a wrapper for every BIF called by native code.
2011-10-26erts-hipe: Rename fail_bif_interface_0 to standard_bif_interface_0Sverker Eriksson
2011-10-26erts-hipe: Deliberate leak of native fun entriesSverker Eriksson
This is a workaround as hipe code upgrade/unloading does not work properly.
2011-10-26erts-hipe: Fix new trap conventions for x86, amd64 and ppcSverker Eriksson
2011-10-26Store the trap address in p->iBjörn Gustavsson
For cleanliness, store the trap address in p->i instead of in p->def_arg_reg[3].
2011-10-26Store the trap arguments in the X register arrayBjörn Gustavsson
Store arguments for a trap in the X register array to allow traps to have any number of arguments.
2011-10-26erts-hipe: Make some primops use new BIF calling conventionSverker Eriksson
These primops use the standard_bif_interface_X macros in hipe_bif_list.m4 and must therefor be implemented as bifs for things to work. Maybe there is room for optimization here to call the primops more directly with arguments in registers without having to push them on stack to emulate bif calls.
2011-10-26erts-hipe: Adapt generated BIF wrappers for new calling conventionSverker Eriksson
x86 and amd64: Push BIF__ARGS array on C-stack. ppc, sparc and arm: Write BIF__ARGS array to P->def_arg_reg[] Just the simplest solution with limited assembler knowledge, probably room for improvements.
2011-10-26erts-hipe: Remove obscuring macros in generated assembler codeSverker Eriksson
No semantic change. Just easier to debug when jumps are spelled out and not obscured by yet another layer of macros.
2011-10-26erts-hipe: Make hipe enabled emulator compile with new BIF callsSverker Eriksson
A first step to adapt hipe to the new BIF calling convention.
2011-10-26Simplify the instructions for calling BIFsBjörn Gustavsson
Taking advantage of the new calling convention for BIFs, we only need one instruction to handle BIFs with any number of arguments. This change eliminates the limit of three arguments for BIFs, but traps are still limited to three arguments.
2011-10-26Change the calling convention for BIFsBjörn Gustavsson
The current calling convention for BIFs makes it necessary to handle each arity specially, since each argument for the BIF also becomes an argument for the C function implementing the BIF, which makes it hard to allow BIFs with any number of arguments. Change the calling convention for BIFs, so that BIF arguments are passed in an array to the C function implementing the BIF.
2011-10-26Use the proper macros in all BIFsBjörn Gustavsson
As a preparation for changing the calling convention for BIFs, make sure that all BIFs use the macros. Also, eliminate all calls from one BIF to another, since that also breaks the calling convention abstraction.
2011-10-20Merge branch 'bjorn/unicode-noncharacters/OTP-9624'Björn Gustavsson
* bjorn/unicode-noncharacters/OTP-9624: Allow noncharacter code points in unicode encoding and decoding
2011-10-18erts: convert variadic nif funs into inline funsTuncer Ayaz
2011-10-18Merge branch 'fm/enif_is_number'Henrik Nord
* fm/enif_is_number: Add NIF function enif_is_number Conflicts: erts/emulator/beam/erl_nif_api_funcs.h OTP-9629
2011-10-14Merge branch 'rickard/atomics-api/OTP-9014' and OTP_R14B04Rickard Green
Conflicts: erts/aclocal.m4 erts/emulator/beam/erl_db.c erts/emulator/sys/win32/sys.c erts/include/internal/ethread_header_config.h.in
2011-10-13Allow noncharacter code points in unicode encoding and decodingBjörn Gustavsson
The two noncharacter code points 16#FFFE and 16#FFFF were not allowed to be encoded or decoded using the unicode module or bit syntax. That causes an inconsistency, since the noncharacters 16#FDD0 to 16#FDEF could be encoded/decoded. There is two ways to fix that inconsistency. We have chosen to allow 16#FFFE and 16#FFFF to be encoded and decoded, because the noncharacters could be useful internally within an application and it will make encoding and decoding slightly faster. Reported-by: Alisdair Sullivan
2011-10-13make_preload: Don't output a C comment start inside a commentBjörn Gustavsson
We already avoid outputting a comment terminator ("*/") inside a comment to avoid causing a syntax error. Also avoid outputting the start of a comment ("/*") to avoid causing a compiler warning. Noticed-by: Tuncer Ayaz
2011-10-12Merge branch 'bjorn/erts/beam-loader-fixes'Björn Gustavsson
* bjorn/erts/beam-loader-fixes: Print transformtions sorted on the name of the first instruction Share code for call of predicate and transformation functions Simplify transformations of gc_bif[123] instructions Refactor 'too_old_compiler' handling Introduce 'try_me_else_fail' Combine 'store_var' with 'next_arg' Merge 'next_instr' and 'is_op' into 'next_instr' Merge 'new_instr' and 'store_op' into 'new_instr' Combine a 'call' instruction with the following 'end' instruction Remove some unnecessary type constraints in transformations Get rid of redundant 'try_me_else' and 'fail' instructions Add some more information in instruction comments In transformations, don't store variables that are never used Remove redundant 'next_arg' before 'next_instr' Generalize and rename is_set_var_instr() to is_instr() Remove too_old_compiler handling for very old instruction variants Remove the special instructions for the hybrid heap emulator Remove optimization of 'move R R'
2011-10-11Do small optimisation on platforms with 32 bit EtermLukas Larsson
On 32 bit we know that a comparison with a lossfull double and a short will always give the float is being superior. So therefore we only have to check the sign on the double.
2011-10-11Add tests for equality checkingLukas Larsson
Test for checking equality on all float exponents Test in equality for all comparison tests
2011-10-11Optimize comparison of huge floats and smaller bignumsLukas Larsson