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The parser handled the builtin ABSTRACT-SYNTAX and TYPE-IDENTIFIER
classes specially, which caused problems. It turns out that there
is no longer any need to handle those classes specially.
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An optional group must not contain mandatory class fields. All
mandatory fields must be included in the simplified syntax.
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Add the ASN.1 specs from RFC-5911 and RFC-5912.
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Besides simplifying the code and doing better error checking
and error reporting, fix the following bugs:
Support retrieving an OBJECT IDENTIFIER/RELATIVE-OID from an
object. Example:
oid OBJECT IDENTIFIER ::= some-object.&some-field
Allow an integer constant first in an OBJECT IDENTIFIER:
integer INTEGER ::= 0
oid OBJECT IDENTIFIER ::= {integer 1}
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Wrong fields in the record where checked when sorting, which caused
duplicate objects to exist in constructed object sets and later caused
an error.
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asn1ct_gen:gen_types/3 is called by gen_encode_constructed/4 and
generates encode *and* decode functions for any nested types.
To faciliate future rewriting, where we might want to tweak code
generation for encode and decode separately, refactor the code
so that gen_encode_constructed/4 will only encode functions for
nested types, and gen_deccode_constructed/4 will generate decode
functions for nested types.
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PKIX1Explicit-2009 did not compile.
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Also add proper error handling.
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File names and line number information was not reliable available
when producing error messages. Some items have embedded line number
information, and sometimes the S#state.type and/or S#state.value
could be used to retrieve the line number information.
To make sure that we can always retrieve at least an approximate
error location, store the top-level construct being checked in
S#state.error_context. Example of top-level constructs:
Seq ::= SEQUENCE {...}
i INTEGER ::= 42
This is a short-term solution. In the long term, we would want the
parser to include line number information in all items.
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Object sets with extension mark and without optional fields was not
generated properly. It needs the default [enc|dec]_xxx function clause
for the open type but no other clauses.
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Rewrite the confusing and buggy matching of an object definition
against the simplified syntax.
While we are at it, we will also add proper error handling.
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When the parser sees:
something SOMETHING ::= {}
it has no way of knowing whether 'something' is an value or an
object. It depends on how SOMETHING is defined. For example:
SOMETHING ::= SEQUENCE {}
or
SOMETHING ::= CLASS { &id OPTIONAL }
Because of that ambiguity, there is no way to avoid a special case
when we check an object definition. However, there is no need to
invent an entire new checking function for this special case. It is
much easier to just pretend that the parser gave us
{object,defaultsyntax,[]} and let check_objectdefn/3 check it in the
usual way.
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An #'Externavaluereference'{} may either be a value or an object.
In places where objects are expected, we will need to call
object_to_check/1 to convert an #'Externavaluereference'{} to an
object. It was forgotten in two places.
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Refactor and clean up code. While at it, add error handling and
test cases. (Also add test cases for the existing values in
ValueTest.asn while we are it.)
Add support for defining INTEGER constants by extracting
fields from objects. Example:
int-from-object INTEGER ::= object.&id
When extracting values from objects in constraints, only one
level of extraction would work. That is, the following would
work:
SomeName ::= INTEGER (object.&int)
but not:
SomeName ::= INTEGER (object.&obj.&int)
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There is duplicated effort in that validate_integer() checks
whether the integer value is valid, and then normalize_integer()
does mostly the same work in order to convert the value to an
integer.
Eliminate the validate_integer() function and incorporate
its checks into normalize_integer(). Also produce proper
error messages.
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Class names must start with an uppercase letter and only contain
uppercase letters, digits, or hyphens. The parser will not allow
class names that don't start with an uppercase letter, so we don't
have to check that.
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We only tested that ValueTest.asn1 would compile, no that the
values were correct.
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Don't build a record using the tuple syntax. It is bad in case
we would want to change the record definition later.
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* bjorn/compiler/beam_dead/OTP-12393:
Update the comments that explain what beam_dead does
Improve optimization of bs_start_match2
Extend count_bits_matched/3 to handle the UTF instructions
misc_SUITE: Cover the exception handling code in beam_dead
Generalize optimizations using shortcut_rel_op/4
beam_dead: Optimize branches from relational conditionals
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While we are, clean up the comments and rearrange the code for
clarity. Also add a test to cover the last uncovered line in
beam_dead.erl.
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Amend the test suite to call beam_dead as originally intended (and not
beam_block), and modify the input data so that the exception will
occur within the try ... catch block in function/2.
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Better optimizations with less code.
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The BEAM compiler translates code such as:
is_hex_digit(D) when $0 =< D, D =< $9 -> true;
is_hex_digit(D) when $a =< D, D =< $z -> true;
is_hex_digit(D) when $A =< D, D =< $Z -> true;
is_hex_digit(_) -> false.
to something like this:
L0: test is_ge L1 {x,0} 48
test is_ge L1 57 {x,0}
move true {x,0}
return.
L1: test is_ge L2 {x,0} 97
test is_ge L2 122 {x,0}
move true {x,0}
return
L2: test is_ge L3 {x,0} 65
test is_ge L3 90 {x,0}
move true {x,0}
return
L3: move false {x,0}
return
We can see that tests will be repeated even if they cannot possibly
succeed. For instance, if we pass in {x,0} equal to 32, the first
test that {x,0} is greater than or equal to 48 at L0 will fail.
The control will transfer to L1, where it will be tested whether
{x,0} is greater than 97. That test will fail and control
will pass to L2, where again the test will fail.
The compiler can do better by short-circuiting repeating tests:
L0: test is_ge L3 {x,0} 48
test is_ge L1 57 {x,0}
move true {x,0}
return.
L1: test is_ge L2 {x,0} 97
test is_ge L3 122 {x,0}
move true {x,0}
return
L2: test is_ge L3 {x,0} 65
test is_ge L3 90 {x,0}
move true {x,0}
return
L3: move false {x,0}
return
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* tombenner/doc_fixes:
Fix grammar and formatting issues
Fix typo ("to use to use")
Add a comma after "For example" when appropriate
Use colons before <code> when appropriate
Move periods inside parenthetical sentences
Add an apostrophe to contractions of "let us"
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* derek121/mnesia-doc-fixes:
Fix grammar
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* lemenkov/use_os_getenv_2:
fix missing include
Start using os:getenv/2 fun
Introduce os:getenv/2
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* mikpe/fix-eacces-spelling:
fix eacces spelling
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* arekinath/aes-evp/OTP-12380:
crypto: use EVP for AES-CBC
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* lukas/erts/crashdump_improvements/OTP-12377:
erts: Make main thread safe from pipe closed event
erts: Improve crash dumps
erts: Rename sys_sigset to sys_signal
erts: Introduce thread suspend functions
erts: Remove usage of QUANTIFY signal
erts: Add support for thread names
ets: Increase data available in crash dumps and ets:info
erts: Start compilation of beam_emu earlier
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This commit improves crash dumps in several ways:
* Suspends schedulers to get a current snapshot
* Dumps information about scheduler
* Dumps stack trace of current running process
(including Garbing processes)
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Also removed old legacy fallback that is no longer used
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