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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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* ingela/inets/httpc/ERL-253:
inets: httpc improve error handling
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* kostis/inets-reference-record-types/PR-1188:
Replace ref() with reference() in inets files
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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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* dgud/mnesia/dirty_select_cont/PR-1184/OTP-13944:
Allow reusing mnesia select continuations
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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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* 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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- EDoc markup font-locking and tag completion
- EDoc comment indentation
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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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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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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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* maint:
parsetools: Correct counting of newlines
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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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* hasse/parsetools/fix_leex_counting/ERL-263/OTP-13916:
parsetools: Correct counting of newlines
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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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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:
Update primary bootstrap
beam_block: Avoid unsafe inclusion of get_map_elements in blocks
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* bjorn/compiler/beam_block/ERL-266/OTP-13931:
beam_block: Avoid unsafe inclusion of get_map_elements in blocks
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c2035ebb8b restricted the get_map_elements instruction so that it
could only occur at the beginning of a block. It turns out that
including it anywhere in a block is unsafe.
Therefore, never put get_map_elements instruction in blocks.
(Also remove the beam_utils:join_even/2 function since it is no
longer used.)
ERL-266
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* maint:
erlang-mode: do not configure require-final-newline
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* dgud/emacs/do-not-require-final-newline/PR-1130:
erlang-mode: do not configure require-final-newline
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* maint:
add info for param and returns tags
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* cypherfox/edoc/add_doc/PR-1175:
add info for param and returns tags
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