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2018-03-09Update release notesErlang/OTP
2018-03-09Update version numbersErlang/OTP
2018-02-09Check that the stack is initialized when an exception may occurBjörn Gustavsson
Strengthen beam_validator to check that the stack is initialized when an instruction with an {f,0} operand is executed. For example, the following code sequence: {allocate,0,1}. {bif,element,{f,0},[{integer,1},{x,0}],{x,0}}. should not be accepted because the stack may be scanned if element/2 fails. That could cause a crash or other undefined behavior if garbage on the stack looks like a catch tag.
2018-01-29Fix incorrect type interference of integer rangesBjörn Gustavsson
2018-01-10Merge pull request #1674 from bjorng/bjorn/compiler/beam_validatorBjörn Gustavsson
beam_validator: Strengthen validation of GC instructions OTP-14863
2018-01-08beam_validator: Strengthen validation of GC instructionsBjörn Gustavsson
beam_validator did not verify that the Y registers were initialized before executing the following instructions that could cause a GC: bs_append/8 bs_init2/6 bs_init_bits/6 gc_bif1/5 gc_bif2/6 gc_bif3/7 test_heap/2 That means that, for example, an incorrect optimization that replaced an 'allocate_zero' instruction with an 'allocate' instruction when it was not safe, would not be rejected by beam_validtor, but would instead cause a crash or other undefined behavior at runtime. Also fix a minor bug in beam_type exposed by the stronger checking. When compiling from .S files, beam_type did not handle the init/1 instruction and could produce unsafe code.
2018-01-04Remove unsafe is_record/test_arity optimizationsJohn Högberg
The type optimizations for is_record and test_arity checked whether the arity was equal to the size stored in the type information, which is incorrect since said size is the *minimum* size of the tuple (as determined by previous instructions) and not its exact size. A future patch to the 'master' branch will restore these optimizations in a safe manner.
2017-12-08Update release notesErlang/OTP
2017-12-08Update version numbersErlang/OTP
2017-11-20Merge branch 'lukas/compiler/add_to_dis/OTP-14784' into maintLukas Larsson
* lukas/compiler/add_to_dis/OTP-14784: compiler: Add +to_dis option that dumps loaded asm
2017-11-20compiler: Add +to_dis option that dumps loaded asmLukas Larsson
2017-11-20Merge branch 'lukas/docs/xmllint_fixes/OTP-14721' into maintLukas Larsson
* lukas/docs/xmllint_fixes/OTP-14721: ssl/ssh: Remove/ignore unused XML_FILES doc files Refactor xmllint check and make it fail on failure Add toplevel xmllint make target Conflicts: lib/crypto/doc/src/Makefile
2017-11-16Merge branch 'maint-18' into maintHans Nilsson
* maint-18: Updated OTP version Prepare release ssh: Unicode encoding fix ssh: testcases for space trailing Hello msg Remove unused test include file from test suites eldap: Repair Makefile ssh: Don't remove trailing WS in Hello msg Conflicts: OTP_VERSION erts/doc/src/notes.xml erts/vsn.mk lib/compiler/doc/src/notes.xml lib/compiler/vsn.mk lib/crypto/test/blowfish_SUITE.erl lib/eldap/doc/src/notes.xml lib/eldap/vsn.mk lib/inets/test/httpd_load.erl lib/inets/test/httpd_mod.erl lib/inets/test/old_httpd_SUITE.erl lib/ssh/doc/src/notes.xml lib/ssh/vsn.mk lib/stdlib/test/zip_SUITE.erl otp_versions.table
2017-11-15Prepare releaseErlang/OTP
2017-11-15Merge branch ↵Erlang/OTP
'john/compiler/fail-labels-in-blocks-otp-18/ERIERL-48/OTP-14522' into maint-18 * john/compiler/fail-labels-in-blocks-otp-18/ERIERL-48/OTP-14522: compiler: Fix live regs update on allocate in validator Take fail labels into account when determining liveness in block ops
2017-11-10Recognize 'deterministic' when given in a -compile() attributeBjörn Gustavsson
The compiler option 'deterministic' was only recognized when given as an option to the compiler, not when it was specified in a -compile() attribute in the source file. https://bugs.erlang.org/browse/ERL-498
2017-10-31Refactor xmllint check and make it fail on failureLukas Larsson
This commit also adds a check to see that all files that are part of an xi:include also have part of XML_FILES and vice versa. It also fixes any applications where this was not true.
2017-10-10Merge branch 'lars/doc-cleanup/OTP-14475' into maintLars Thorsen
* lars/doc-cleanup/OTP-14475: [edoc] Remove unused module otpsgml_layout.erl Remove unused files from the documentation build
2017-10-05Merge branch 'maint-19' into maintRickard Green
* maint-19: Updated OTP version Update release notes Update version numbers Conflicts: OTP_VERSION erts/doc/src/notes.xml erts/vsn.mk lib/compiler/doc/src/notes.xml lib/compiler/vsn.mk otp_versions.table
2017-10-05Update release notesErlang/OTP
2017-10-05Update version numbersErlang/OTP
2017-10-02Prepare releaseErlang/OTP
2017-09-29Fix incorrect internal consistency failure for binary matching codeBjörn Gustavsson
4c31fd0b9665 made the merging of match contexts stricter; in fact, a little bit too strict. Two match contexts with different number of slots would be downgraded to the 'term' type. The correct way is to keep the match context but set the number of slots to the lowest number of slots of the two match contexts. https://bugs.erlang.org/browse/ERL-490
2017-09-28Remove unused files from the documentation buildLars Thorsen
2017-09-22Update release notesErlang/OTP
2017-09-22Update version numbersErlang/OTP
2017-08-30Make handling of match contexts stricterBjörn Gustavsson
beam_validator could fail issue a diagnostic when a register that was supposed to be a match context was not guaranteed to be a match context. The bug was in merging of types. Merging of a match context with another term would result in a match context. That is wrong. Merging should produce a more general type, not a narrower type. Also, the valid slots in two match contexts should be combined with 'band', not 'bor'.
2017-08-24Merge branch 'maint-20' into maintRaimo Niskanen
* maint-20: Updated OTP version Prepare release Accept non-binary options as socket-options Bump version Fix broken handling of default values in extensions for PER compiler: Fix live regs update on allocate in validator Take fail labels into account when determining liveness in block ops Check for overflow when appending binaries, and error out with system_limit
2017-08-23Prepare releaseErlang/OTP
2017-08-23Merge branch ↵Erlang/OTP
'john/compiler/fail-labels-in-blocks-otp-19/ERIERL-48/OTP-14522' into maint-20 * john/compiler/fail-labels-in-blocks-otp-19/ERIERL-48/OTP-14522: compiler: Fix live regs update on allocate in validator Take fail labels into account when determining liveness in block ops
2017-08-22Merge branch ↵Lukas Larsson
'john/compiler/fail-labels-in-blocks-otp-18/ERIERL-48/OTP-14522' into maint * john/compiler/fail-labels-in-blocks-otp-18/ERIERL-48/OTP-14522: compiler: Fix live regs update on allocate in validator Take fail labels into account when determining liveness in block ops Conflicts: lib/compiler/src/beam_utils.erl
2017-08-16compiler: Fix live regs update on allocate in validatorLukas Larsson
The state without pruned registers was passed on to test_heap causing the validator to belive registers that aren't live actually are live.
2017-08-16compiler: Fix live regs update on allocate in validatorLukas Larsson
The state without pruned registers was passed on to test_heap causing the validator to belive registers that aren't live actually are live.
2017-08-16Take fail labels into account when determining liveness in block opsJohn Högberg
2017-08-07Take fail labels into account when determining liveness in block opsJohn Högberg
2017-08-07sys_core_fold: Fix unsafe optimization of non-variable applyBjörn Gustavsson
The sys_core_fold pass would do an unsafe "optimization" when an apply operation did not have a variable in the function position as in the following example: > cat test1.core module 'test1' ['test1'/2] attributes [] 'i'/1 = fun (_f) -> _f 'test1'/2 = fun (_f, _x) -> apply apply 'i'/1 (_f) (_x) end > erlc test1.core no_file: Warning: invalid function call Reported-by: Mikael Pettersson
2017-06-21Prepare releaseErlang/OTP
2017-06-14Update copyright yearHans Nilsson
2017-06-14Merge branch 'bjorn/compiler/fix-invalid-orddict'Björn Gustavsson
* bjorn/compiler/fix-invalid-orddict: v3_kernel: Keep orddicts sorted sys_core_fold: Ensure that orddict keys are unique
2017-06-14Merge branch 'bjorn/cuddle-with-tests'Björn Gustavsson
* bjorn/cuddle-with-tests: Eliminate warnings for unused variables Remove unused functions in test emulator test suites process_SUITE: Don't leave processes running trace_port_SUITE: Don't leave processes running tracer_SUITE: Don't leave processes running trace_nif_SUITE: Don't leave processes running trace_bif_SUITE: Don't leave processes running trace_SUITE: Don't leave processes running message_queue_data_SUITE: Don't leave processes running Add informational test case z_SUITE:leaked_processes/1 busy_port_SUITE: Ensure that all created procesesses are killed busy_port_SUITE: Eliminate warnings for unused variables busy_port_SUITE: Eliminate 'export_all' after_SUITE: Don't leave a process running beam_type_SUITE: Add a test case for an already fixed bug
2017-06-13v3_kernel: Keep orddicts sortedBjörn Gustavsson
2017-06-13sys_core_fold: Ensure that orddict keys are uniqueBjörn Gustavsson
All keys in an orddict must be unique. sys_core_fold:sub_sub_scope/1 broke that rule. It was probably harmless, but it is better to avoid such rule violations.
2017-06-12Merge branch 'hasse/unicode_atoms/OTP-14285'Hans Bolinder
* hasse/unicode_atoms/OTP-14285: compiler: Handle (bad) Unicode parse transform module names kernel: Improve handling of Unicode filenames stdlib: Handle Unicode atoms in ms_transform stdlib: Improve Unicode handling of the Erlang parser stdlib: Handle unknown compiler options with Unicode stdlib: Handle Unicode macro names stdlib: Correct Unicode handling in escript dialyzer: Improve handling of Unicode parsetools: Improve handling of Unicode atoms stdlib: Handle Unicode atoms when formatting stacktraces stdlib: Add more checks of module names to the linter stdlib: Handle Unicode atoms better in io_lib_format stdlib: Handle Unicode atoms in c.erl
2017-06-12compiler: Handle (bad) Unicode parse transform module namesHans Bolinder
2017-06-12beam_type_SUITE: Add a test case for an already fixed bugBjörn Gustavsson
https://bugs.erlang.org/browse/ERL-433
2017-06-07Fix unsafe bit syntax matching optimizationBjörn Gustavsson
As part of sys_core_fold, variables involved in bit syntax matching would be annotated when it would be safe for a later pass to do the delayed sub-binary creation optimization. An implicit assumption regarding the annotation was that the code must not be further optimized. That assumption was broken in 05130e48555891, which introduced a fixpoint iteration (applying the optimizations until there were no more changes). That means that a variable could be annotated as safe for reusing the match context in one iteration, but a later iteration could rewrite the code in a way that would make the optimization unsafe. One way to fix this would be to clear all reuse_for_context annotations before each iteration. But that would be wasteful. Instead I chose to fix the problem by moving out the annotation code to a separate pass (sys_core_bsm) that is run later after all major optimizations of Core Erlang has been done.
2017-05-31Revert "Prepare release"Hans Nilsson
This reverts commit eaf8ca41dfa4850437ad270d3897399c9358ced0.
2017-05-30Prepare releaseErlang/OTP
2017-05-23Correct handling of module name in compile:forms/1,2Björn Gustavsson
compile:forms/1,2 is documented to return: {ok,ModuleName,BinaryOrCode} However, if one of the options 'from_core', 'from_asm', or 'from_beam' is given, ModuleName will be returned as []. A worse problem is that is that if one those options are combined with the 'native' option, compilation will crash. Correct compile:forms/1,2 to pick up the module name from the forms provided (either Core Erlang, Beam assembly code, or a Beam file). Reported here: https://bugs.erlang.org/browse/ERL-417
2017-05-19genop.tab: Add an OTP 20 commentBjörn Gustavsson
Make it clear that is_tagged_tuple/4 was added in OTP 20 (not R17).
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