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to get a nice SIGILL crash.
For x86 and x86_64 only.
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This is part of commit 1bd508921dd93086b05e7d0038b816b36c421d86.
I did not include the fun-checking as we have a new purge strategy
for funs in OTP 20. That remains to be solved some other way for hipe.
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Just like the BEAM loader state (as returned by
erlang:prepare_loading/2), the HiPE loader state is contained in a magic
binary.
Eventually, we will separate HiPE loading into a prepare and a finalise
phase, like the BEAM loader, where the prepare phase will be implemented
by hipe_unified_loader and the finalise phase be implemented in C by
hipe_load.c and beam_load.c, making prepare side-effect free and
finalise atomic. The finalise phase will be exposed through the
erlang:finish_loading/1 API, just like the BEAM loader, as this will
allow HiPE and BEAM modules to be mixed in the same atomic "commit".
The usage of a loader state makes it easier to keep track of all
resources allocated during loading, and will not only make it easy to
prevent leaks when hipe_unified_loader crashes, but also paves the way
for proper, leak-free, unloading of HiPE modules.
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and hipe_bifs:update_code_size
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A step toward better integration of hipe load and purge
Highlights:
* code_server no longer needs to call hipe_unified_loader:post_beam_load/1
Instead new internal function hipe_redirect_to_module()
is called by loading BIFs to patch native call sites if needed.
* hipe_purge_module() is called by erts_internal:purge_module/2
to purge any native code.
* struct hipe_mfa_info redesigned and only used for exported
functions that are called from or implemented by native code.
A list of native call sites (struct hipe_ref) are kept for each hipe_mfa_info.
* struct hipe_sdesc used by hipe_find_mfa_from_ra()
to build native stack traces.
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as they are lists of #fundef records
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with a copy_module() function.
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* maint:
beam_bsm: Eliminate unsafe optimization
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* bjorn/compiler/beam_bsm/ERL-268/OTP-13947:
beam_bsm: Eliminate unsafe optimization
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The following code causes a compiler failure:
first_after(Data, Offset) ->
case byte_size(Data) > Offset of
false ->
{First, Rest} = {ok, ok},
ok;
true ->
<<_:Offset/binary, Rest/binary>> = Data,
%% 'Rest' saved in y(0) before the call.
{First, _} = match_first(Data, Rest),
%% When beam_bsm sees the code, the following line
%% which uses y(0) has been optimized away.
{First, Rest} = {First, Rest},
First
end.
match_first(_, <<First:1/binary, Rest/binary>>) ->
{First, Rest}.
Here is the error message from beam_validator:
t: function first_after/2+15:
Internal consistency check failed - please report this bug.
Instruction: {call,2,{f,7}}
Error: {multiple_match_contexts,[{x,1},0]}:
Basically, what happens is that at time of code generation,
the variable 'Rest' is needed after the call to match_first/2
and is therefore saved in y(0). When beam_bsm (a late optimization
pass) sees the code, the use of y(0) following the call
to match_first/2 has been optimized away. beam_bsm therefore
assumes that the delayed sub-binary creation is safe. (Actually,
it is safe, but beam_validator does not realize it.)
The bug was caused by two separate commits:
e199e2471a reduced the number of special cases to handle in BEAM
optimization passed by breaking apart the tail-recursive call
instructions (call_only and call_last) into separate instructions.
Unfortunately, the special handling for tail calls was lost, which
resulted in worse code (i.e. the delayed sub-binary creation
optimization could not be applied).
e1aa422290 tried to compensate, but did so in a way that was not
always safe.
Teaching beam_validator that this kind of code is safe would be
expensive.
Instead, we will undo the damage caused by the two
commits. Re-introduce the special handling of tail-recursive calls in
beam_bsm that was lost in the first commit. (Effectively) revert the
change in the second commit.
ERL-268
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* ingela/inets/httpc/ERL-253:
inets: httpc improve error handling
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Handler process should exit normal if manager process has been terminated
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* kostis/inets-reference-record-types/PR-1188:
Replace ref() with reference() in inets files
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This supersedes PR #1185 (submitted by @KrzysiekJ) that changed
all occurrences of ref() with reference() in inets files.
However, there is little point in having these types only in comments.
So, these types are now exposed as type declarations for the record
fields they appear. While at it, uncommented more commented out type
declarations and declared types for records defined in the affected
modules and header files.
Some type-unfriendly and obsolete code related to supporting code
ungrades with a really old OTP release was also removed.
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* ingela/ssl/cipher-type-spec:
ssl: Adjust cipher type to conform to implementation
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* maint:
New file erlang-edoc.el to support EDoc in erlang-mode
Allow reusing mnesia select continuations
Fix guard test for chardata
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* dgud/wx/fix-unicode-chardata/ERL-270/OTP-13934:
Fix guard test for chardata
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Previously only accepted lists tough a call is made to
unicode:characters_to_binary/1, and the functions where specified to
handle chardata.
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* dgud/mnesia/dirty_select_cont/PR-1184/OTP-13944:
Allow reusing mnesia select continuations
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A continuation returned by mnesia:select/[14] should be reusable in
different, non-transactional activities. Aborting with
wrong_transaction doesn't make sense in a dirty context.
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* dgud/tools/emacs/edoc-support/PR-1195/OTP-13945:
New file erlang-edoc.el to support EDoc in erlang-mode
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- EDoc markup font-locking and tag completion
- EDoc comment indentation
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* maint:
Update per review comments.
Fix reference to automatic `undefined` field declared types.
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* rohrer/doc/undefined_fields/PR-1189:
Update per review comments.
Fix reference to automatic `undefined` field declared types.
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In 8ce35b287fb50a6845fccf6a13c672aae303dc91 automatic insertion of `undefined` for record fields without initializers was removed, but this was not noted in the documentation. Add a warning about this change using similar verbiage as the original docs.
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Conflicts:
OTP_VERSION
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* ingela/ssh/channel_exit_handling/OTP-13932:
ssh: Prepare release
ssh: Handle gen_server:call/3 exits properly
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Handle all possible exit values that should be interpreted as {error,
closed}. Failing to do so could lead to unexpected crashes for users
of the ssh application.
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* maint:
parsetools: Correct counting of newlines
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* hasse/parsetools/fix_leex_counting/ERL-263/OTP-13916:
parsetools: Correct counting of newlines
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See https://bugs.erlang.org/browse/ERL-263
The fix in commit c9bc5c94 of PR-431
(https://github.com/erlang/otp/pull/431) introduced new problems.
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* maint:
wx: add wxWindowDragAcceptFiles
wx: Add simple dropfiles support
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* dgud/wx/drop-files/OTP-13933:
wx: add wxWindowDragAcceptFiles
wx: Add simple dropfiles support
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Enable window to handle drop file events.
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Added wxDropFiles event
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* maint:
Update primary bootstrap
beam_block: Avoid unsafe inclusion of get_map_elements in blocks
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