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Memory consumption is marginally reduced.
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Instead of two records, #plt{} with dict:s and #mini_plt{} with ETS
tables, one record is used for representing PLT:s in RAM.
The #mini_plt{} is the one now used throughout analyses, but it is
called #plt{}.
When writing the PLT to file, another record is used, #file_plt{} (as
before). When creating #file_plt{}, the #plt{} is deleted (it cannot
be used for further analyses).
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Avoid some ETS-lookups. Marginal speed-ups.
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The arguments of calls to a debug function are no longer evaluated.
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In typesig: do not look up the module's types unless it is necessary.
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* maint:
Updated OTP version
Prepare release
inets: Add missing release note
dialyzer: Fix a bug regarding unknown types
erl_mseg.c: don't use invalid indices in - > cache_powered_node[]
Fix release note for OTP-14290
Conflicts:
OTP_VERSION
erts/emulator/sys/common/erl_mseg.c
erts/vsn.mk
lib/dialyzer/src/dialyzer_analysis_callgraph.erl
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Due to a bug in Dialyzer, unknown types have been introduced.
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Since commit 12b3790 Dialyzer has not reported unknown types.
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The new Dbgi chunk returns data in the following format:
{debug_info_v1, Backend, Data}
This allows compilers to store the debug info in different
formats. In order to retrieve a particular format, for
instance, Erlang Abstract Format, one may invoke:
Backend:debug_info(erlang_v1, Module, Data, Opts)
Besides introducing the chunk above, this commit also:
* Changes beam_lib:chunk(Beam, [:abstract_code]) to
read from the new Dbgi chunk while keeping backwards
compatibility with old .beams
* Adds the {debug_info, {Backend, Data}} option to
compile:file/2 and friends that are stored in the
Dbgi chunk. This allows the debug info encryption
mechanism to work across compilers
* Improves dialyzer to work directly on Core Erlang,
allowing languages that do not have the Erlang
Abstract Format to be dialyzer as long as they emit
the new chunk and their backend implementation is
available
Backwards compatibility is kept across the board except
for those calling beam_lib:chunk(Beam, ["Abst"]), as the
old chunk is no longer available. Note however the "Abst"
chunk has always been optional.
Future OTP versions may remove parsing the "Abst" chunk
altogether from beam_lib once Erlang 19 and earlier is no
longer supported.
The current Dialyzer implementation still supports earlier
.beam files and such may also be removed in future versions.
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* bjorn/dialyzer/add-typer/OTP-14336:
Add smoke test for TypER
Add back TypEr to the main OTP repository
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It turned out that the dependencies between Dialyzer
and TypEr makes it impractical to have TypEr in a
separate repository.
Add it back to the OTP repository, but put the Erlang
module 'typer' in the dialyzer application.
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The same checks are also performed by the Dialyzer.
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* maint:
dialyzer: Improve a warning
dialyzer: Fix a weird warning
dialyzer: Fix an opaque bug
dialyzer: Minor fix
Conflicts:
lib/dialyzer/src/dialyzer_dataflow.erl
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* hasse/dialyzer/fix_warnings/OTP-14177:
dialyzer: Improve a warning
dialyzer: Fix a weird warning
dialyzer: Fix an opaque bug
dialyzer: Minor fix
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* maint:
tools: Use portable lookup of home directory
dialyzer, observer: Use portable lookup of home directory
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Use init:get_argument(home) to find the location of the home
directory. That will work on all platforms (including Windows).
Note that the run-time system will fail to start if HOME
(or the equivalent on Windows) is not set. Therefore, it can
be assumed that init:get_argument(home) will not fail.
ERL-161
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* maint:
typer: Update runtime dependencies
dialyzer: Update runtime dependencies
Correct documentation of get_modules message
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An opaque bug that would crash Dialyzer has been fixed.
The bug was reported by Nick Marino.
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* hasse/dialyzer/memory_opt/OTP-14127:
dialyzer: Attempt to reduce memory consumption
dialyzer: Do not spawn all workers at once
dialyzer: Write PLT in subprocess
dialyzer: Remove code for non-started workers
dialyzer: Sort graphs topologically
dialyzer: Compress some PLT tables
dialyzer: Check return value of digrahp:add_edge()
dialyzer: Use less memory for the PLT when analyzing
typer: Fix a bug regarding the -T option
dialyzer: Do not keep the code server's type info on the heap
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* maint:
dialyzer: Fix a Dialyzer warning
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The 'deps' field is reset when no longer used, which could possibly
save some memory.
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Spawning all worker processes at once has the potential to increase
peak memory consumption. Therefore the implementation is now slightly
modified: `20 * dialyzer_utils:parallelism()' processes are running in
parallel. 20 i quite a big factor, but seems necessary to keep all
schedulers busy according to the Observer application's Load Charts,
with a 100 ms update interval.
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At common case, which will otherwise leave a big heap.
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Since SCCs and modules are now topologically sorted (relative the
active graph), we can safely assume that workers have been started.
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Although some variable names indicate that lists of SCCs and modules
are sorted, that was not always the case. The effect on the execution
time of sorting them doesn't seem to be significant.
dialyzer_coordinator:sccs_to_pids() should now always return an empty
second list (not yet started workers).
Since the condensation of graphs often needs a lot of heap memory, it
is run in a separate process.
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Compressing the signatures or the contract records would cost time.
The contract records are still held in two places (code server and
PLT) in many cases.
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The two tables for (record) types and exported types are no longer
kept in memory (by the PLT) when analyzing, which reduces memory
consumption.
A first step towards removing (or replacing) the #plt{} record.
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The -T option has not been working for a long time.
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The table used during translation of forms to types used to be a
dictionary of the type info (-type(), -opaque(), and -record()) for
all modules. Now it is reduced to the modules that are needed to
handle references to types in other modules.
The PLT:s type info is still kept on the heap.
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* maint:
dialyzer: Increase time limit for tests
dialyzer: Optimize typesig
dialyzer: Optimize evaluation of complex code
dialyzer: Optimize collection of variables
Conflicts:
lib/dialyzer/src/dialyzer_typesig.erl
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dialyzer_typesig:traverse_scc() now resets the context for each
element of the SCC. Since the results of traversing the elements are
saved in the 'cmap' table, there is no need to create an SCC
conjunction. For huge SCCs this saves quite some time: the
lift_lists() function added one element at a time, which made the
calculation of deps very slow.
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Improve the evaluation of long lists of constraints.
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* maint:
dialyzer: Compact 'file' annotations in Core code
dialyzer: Try to reduce memory usage
dialyzer: Use less memory when translating contracts
dialyzer: Use maps instaed of dict
dialyzer: Use maps instead of dict for module contracts map
dialyzer: Compress a few more ETS tables
dialyzer: Optimize memory consumption
dialyzer: Reduce memory consumption during 'remote' phase
dialyzer: Update code for finding parallelism
compiler: Do not spawn process when dialyzing
dialyzer: Reduce ETS usage during the typesig phase
dialyzer: Optimize graph condensation
dialyzer: Do not send full PLTs as messages
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File annotations {file, File} in Core Erlang code is replaced by
{file, FakeFile}, where FakeFile is "0", "1", ..., in order to save
memory. When a warning message is created, FakeFile is translated to
the original File (a bit awkward but easy to do).
The Core code stored in ETS tables needs less space, but more
important is that a less heap memory is used in the dataflow,
warnings, and typesig phases, allowing more parallelism.
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The translation from forms to types is done in a separate process
in an attempt to reduce peak memory usage.
Expect further optimizations as it is probably not feasible
in the long run to keep all type information on the heap.
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