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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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The cache used for speeding up the translation from forms to types is
no longer global, but reset per module. The peak memory consumption
is reduced, and the added time seems to be small.
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Using erlang:system_info(schedulers_online) for determining
parallelism is recommended by OTP experts. It takes care of "+S 4:1"
and simultaneous loading of HiPE code.
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If a dialyzer module attribute references an undefined (local)
function an error tuple is thrown but no caught. This leads to a
'nocatch' error and not the intended "clean" error.
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dialyzer_typesig:traverse/3 would perform an unsafe optimisation when
given a cons pattern that contained a map and could be folded into a
literal with cerl:fold_literal/1. In this case, when traversing the map
a type variable would be generated, but this variable would be dropped
by the erl_types:t_cons/2 constructor by in turn calling t_sup(),
producing the overapproximation any(). However, in this particular case,
dialyzer_typesig:traverse/3 is not allowed to overapproximate, since its
result is used in an EQ-constraint.
Although erl_types:t_tuple/1 does not overapproximate like t_cons/2,
which makes the bug unlikely to affect tuples too, the fix was
nevertheless applied defensively to the case of tuples as well.
Also, fix a bug where dialyzer_utils:refold_pattern/1 would generate
syntax nodes with two {label, _} attributes.
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Dialyzer relies heavily on the assumption that the type of a literal
that is used as a pattern is the type of any value that can match that
pattern. For maps, that is not true, and it was causing bad analysis
results. A new help function dialyzer_utils:refold_pattern/1 identifies
maps in literal patterns, and unfolds and labels them, allowing them to
be properly analysed.
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Superfluous usage of insert_temp_exported_types had been in since
6452b57. (Change in commit 8a3ea1f module dialyzer_analysis_callgraph
is a correct simplification and is not relevant.)
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Add more information about the caller of t_from_form(). Instead of
just the module, also provide name of the type, spec, or record where
the type form resides.
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OTP-12845
* bruce/change-license:
fix errors caused by changed line numbers
Change license text to APLv2
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Opaque types need to be expanded before record field types, otherwise
any() could be used for opaque types.
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Remove what it seems redundant checks.
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The check that a modified type of a field is a subtype of the declared
type has been moved outside of the expansion of forms to avoid loops.
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In particular fix handling of records.
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The -dialyzer() attribute can be used for suppressing warnings in a
module by specifying functions or warning options. It can also be used
for requesting warnings in a module.
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The compiler option 'asm' has been replaced by 'from_asm' in
Erlang/OTP 18.0.
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* maint:
dialyzer: do a minor re-factoring
dialyzer: Ignore ERL_COMPILER_OPTIONS when compiling
dialyzer: fix bug concerning compiler option 'warnings_as_errors'
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A minor re-factoring and generalization.
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If, for instance, 'warn_unused_import' is present in
ERL_COMPILER_OPTIONS then many files in Erlang/OTP (Kernel, STDLIB,
...) cannot be analyzed by Dialyzer since the option is not present
when compiling Erlang/OTP, but 'warnings_as_errors' is.
The case that ERL_COMPILER_OPTIONS contains 'warnings_as_errors' can
only be handled by ignoring ERL_COMPILER_OPTIONS.
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A typical scenario: the type digraph() is used in R16 (compilation
with the option 'warnings_as_errors' results in no warning); then the
module is analyzed by a 17 Dialyzer where digraph() is obsolete, and
since the warning is turned into an error Dialyzer fails to load the
module.
Thanks to Michael Truog.
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* fishcakez/dialyzer_beam_opts:
Use compile options when dialyzing beam files
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Fetch the compile options from beam files, and use them when creating
core from the abstract code. Previously the options were ignored.
Test by Henrik Nordh
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* maint:
[dialyzer] Correct a doc bug introduced in 0b041238
[dialyzer] Use the option 'dialyzer' to control the compiler
[dialyzer] Fix handling of literal records
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This ticket is about records in Erlang code, and when to check the
fields against the (optional) types given when defining records.
Dialyzer operates on the Erlang Core format, where there are no trace
of records. The fix implemented is a Real Hack:
Given the new option 'dialyzer' erl_expand_records marks the line
number of records in a way that is undone by v3_core, which in turn
inserts annotations that can be recognized by Dialyzer.
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* fenollp/otp-edoc-usage-fixes:
Fix edoc usage errors
OTP-11702
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The types array(), dict(), digraph(), gb_set(), gb_tree(), queue(),
set(), and tid() have been deprecated. They will be removed in OTP 18.0.
Instead the types array:array(), dict:dict(), digraph:graph(),
gb_set:set(), gb_tree:tree(), queue:queue(), sets:set(), and ets:tid()
can be used. (Note: it has always been necessary to use ets:tid().)
It is allowed in OTP 17.0 to locally re-define the types array(), dict(),
and so on.
New types array:array/1, dict:dict/2, gb_sets:set/1, gb_trees:tree/2,
queue:queue/1, and sets:set/1 have been added.
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Errors discovered using `erldocs`:
Superfluous @hidden tag would exit edoc application;
'Multiple @spec tag': appended a @clear tag after macro condition;
'@spec arity does not match': added missing argument.
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Changes which fix some problems reported by dialyzer users:
1. The handling of nested opaque types
2. The handling of remote types in record expressions used as types
While at it, updated dialyzer's RELEASE_NOTES to reflect these fixes
and did some cleanups to dialyzer_utils.erl so that it gets in sync
with dialyzer's main development branch.
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Bumped version number and wrote RELEASE_NOTES.
Included all changes described in release notes.
Some spec-related changes to some files in lib/hipe/cerl.
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In commit 1858cb81391d2bce29b4b7620574ca60128cebf7, erl_expand_records
started to optimize is_record/2 in guards by replacing it with
pattern matching (if possible).
Unfortunately, dialyzer will no longer see the code before the
optimization, so any warnings produced in code such as:
case ExprNotProducingRecord#rec{} of
X when is_record(X, rec, N) -> ...
will refer to the optimized code and not the source code,
which is confusing for the user.
Introduce the no_is_record_optimization option for turning off
the optimization and use it in dialyzer.
Reported-by: Kostis Sagonas
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