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itself
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For historical reasons, the second argument in handle_call/3 is
{Pid,Tag}. The tag is always 'call' and is never used.
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Load the module as old code; swap old and new code if the
-on_load function succeeds. That way, a failed update attempt
for a module that has an -on_load function will preserve the
previous version of the code.
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As a preparation for fixing some issues with -on_load(), we will
integrate insert_new_code() into erts_finish_loading. Also rename
insert_new_code() to stub_insert_new_code() to make it clear that
it will only be used when making a stub module
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* bjorn/kernel/clean-up-code_server:
Introduce is_dir/1 to test for a directory
Introduce split_base/1 to split into name and version string
Eliminate one call to filename:split/1
Refactor get_name/1
Clean up make_path()
Avoid calling absname/1 on an absolute path
Clean up processing of archive files
Simplify and speed up del_ebin/1
code_SUITE: Enhance test of archive files
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* egil/erts/tracing-support-lttng/OTP-13532: (28 commits)
runtime_tools: User's guide to LTTng and dyntrace
runtime_tools: Fix Dtrace build
erts: Fix gc messages in tracer_SUITE
erts: Fix gc messages in sensitive_SUITE
erts: Fix gc messages in trace_port_SUITE
tools: Update fprof tests
tools: Update fprof with new gc traces
runtime_tools: Update dyntrace_lttng_SUITE tests
runtime_tools: Add 'return_to' for call tracing
erts: Fix return_to trace callback
erts: Update erl_tracer documentation
erts: Fix erl_tracer documentation typos
Update preloaded erl_tracer.beam
erts: Update erl_tracer type specs
runtime_tools: Add lttng dyntrace tests
runtime_tools: Extend 'trace' and 'enabled' tracer callbacks
erts: Extend 'enabled' and 'trace' tracer callbacks
runtime_tools: Extend 'enabled' tracer callbacks
erts: Extend 'enabled' tracer callbacks
runtime_tools: Update lttng garbage collection trace
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Adds the following capabilities to dyntrace
* enabled_running_ports/3
* enabled_running_procs/3 changed from enabled_running/3
* trace_running_ports/6
* trace_running_procs/6 changed from trace_running/6
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Adds the following capabilities to a tracer backend
* enabled_running_procs/3 changed from enabled_running/3
* enabled_running_ports/3
* trace_running_procs/6 changed from trace_running/6
* trace_running_ports/6
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Adds the following capabilities to dyntrace
* enabled_procs/3
* enabled_ports/3
* enabled_running/3
* enabled_call/3
* enabled_send/3
* enabled_receive/3
* enabled_garbage_collection/3
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Adds the following capabilities to a tracer backend
* enabled_procs/3
* enabled_ports/3
* enabled_running/3
* enabled_call/3
* enabled_send/3
* enabled_receive/3
* enabled_garbage_collection/3
These functions will fall back to
enabled/3
if not provided and the tracepoint is active.
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Replace 'gc_start' and 'gc_end' with
* 'gc_minor_start'
* 'gc_minor_end'
* 'gc_major_start'
* 'gc_major_end'
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* mikpe/fp-exceptions-cleanups/PR-1019/OTP-13531:
clean up FP exception code in sys_float.c
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* mikpe/fp-exceptions-neuter-matherr/PR-1018/OTP-13531:
matherr() must not fake an FP exception
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second merge of this branch with some bug fixing
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* hasse/dialyzer_fix_from_form/OTP-13520:
dialyzer: Fix a bug in the translation of forms to types
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A bug is fixed, but there are more problems.
Modify erl_types.erl like this:
-define(EXPAND_LIMIT, 500).
and bogus warnings are output (again).
Callbacks and specs are compared (subtype) in dialyzer_behaviour. If
they are expanded to different depths, then invalid warnings can be
generated.
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Refactor get_name/1 to facilitate an optimization in the next commit.
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make_path() returns a tuple whose second element is not used by
any of its caller. Eliminate the tuple.
Also avoid calling filename:dirname/1 when we already have the result
stored in a variable, and avoid calling filename:basename/2 on a
complete path when we already have the last part of the pathname
stored in a variable.
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absname/1 is quite expensive, so we should not call if we already
have a normalized absolute path.
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The same filtering of sub directories is done in archive_subdirs/1
and try_archive_subdirs/1. Actually, archive_subdirs/1 does nothing
useful. It can be removed and all_archive_subdirs/1 can be renamed
to archive_subdirs/1.
In try_archive_subdirs/1, we can also replace filename:join/1
with the cheaper filename:append/1, since we know that pathnames
have already been normalized.
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It is faster and easier to use filename:split/1 and filename:join/1
than use four different 'filename' operations. Each call in the
original call first flattens the input list, and then traverse the
entire string to the end. So there are roughly 8 complete traversals.
In comparison, filename:split/1 will traverse the input string
twice (once to flatten, once to split) and filename:join/1 once.
For background on why this optimization is worthwhile, here is the
result of profiling the start-up of the run-time system on my computer
(done before this optimization):
$ $ERL_TOP/bin/erl -profile_boot
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filename:join1/4 - 13573 : 13805 us
erlang:finish_loading/1 - 27 : 19963 us
filename:do_flatten/2 - 29337 : 49518 us
erlang:prepare_loading/2 - 49 : 52270 us
Note that filename:do_flatten/2 ends up in second place, almost
as expensive as erlang:prepare_loading/2. Your mileage may vary,
depending on the length of $ERL_TOP and the number of extra
directories added to the path using $ERL_LIBS.
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When using a code archive for an application, it should be possible
to store some directories for the application outside of the archive
file (for example, shared libraries that will not work inside an
archive). Make sure that we test that a directory outside of the
archive file really works.
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