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* kostis/hipe-bs-match-huge-bin:
Fix matching with huge binaries
Compile without errors for exported variables
OTP-13092
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Fix mistakes found by 'xmllint'.
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* lucafavatella/dialyzer-fun-literal-arity:
Teach Dialyzer arity of funs with literal arity
OTP-13068
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copy_offset_int_big was assuming (Offset + Size - 1) (Tmp9 in the first
BB) would not underflow. It was also unconditionally reading and writing
the binary even when Size was zero, unlike copy_int_little, which is the
only other case of bs_put_integer that does not have a short-circuit on
Size = 0.
This was causing segfaults when constructing binaries starting with a
zero-length integer field, because a logical right shift was used to
compute an offset in bytes (which became 0x1fffffffffffffff) to read in
the binary.
Tests, taken from the emulator bs_construct_SUITE, were also added.
The complete credit for the report and the fix goes to Magnus Lång.
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In certain cases of matching with very big binaries, the HiPE compiler
generated code that would fail the match, even in cases that the matching
was successful. The problem was more quite noticeable on 32-bit platforms
where certain integer quantities would be represented as bignums.
Brief summary of changes:
* gen_rtl({bs_skip_bits, ...}, ...) could not handle too large constants.
Previously the constants were truncated to word size.
* hipe_rtl_binary_match:make_size/3 erroneously assumed that the output
of first_part/3 would not overflow when multiplied by 8, which is no
longer true. To maintain full performance, the overflow test is only
performed when BitsVar was a bignum. Thus, the fast path is identical
to before.
* hipe_rtl_binary_match:set_high/2 was assuming that only bits below
bit 27 were ever set in arguments to bs_skip_bits, which is not only
false when the arguments are bignums, but also on 64-bit platforms.
The commit includes a test taken from the bs_match_bin_SUITE.
Most of the credit for finding these HiPE compiler errors and for
creating appropriate fixes for them should go to Magnus Lång.
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Prior to this commit, the fact that parameters of opaque types are
expanded differently depending on the current values of limits used
during expansion, caused problems later when the types of parameters
are used for determining if opaque types are comparable.
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Fix the range type of erlang:abs/1.
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* sverk/hipe-fix-literal-crc:
erts,hipe,dialyzer: Fix hipe checkum of target runtime system
erts: Change THE_NON_VALUE to not be hard coded in hipe compiler
OTP-12962
OTP-12963
OTP-12964
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Main problem:
A faulty HIPE_LITERAL_CRC was not detected by the loader.
Strangeness #1:
Dialyzer should ask the hipe compiler about the target checksum,
not an internal bif.
Strangeness #2:
The HIPE_SYSTEM_CRC checksum was based on the HIPE_LITERALS_CRC
checksum.
Solution:
New HIPE_ERTS_CHECKSUM which is an bxor of the two (now independent)
HIPE_LITERALS_CRC and HIPE_SYSTEM_CRC.
HIPE_LITERALS_CRC represents values that are assumed to stay constant
for different VM configurations of the same arch, and are therefor
hard coded into the hipe compiler.
HIPE_SYSTEM_CRC represents values that may differ between VM variants.
By default the hipe compiler asks the running VM for this checksum,
in order to create beam files for the same running VM.
The hipe compiler can be configured (with "make XCOMP=yes ...") to
create beam files for another VM variant, in which case HIPE_SYSTEM_CRC
is also hard coded.
ToDo:
Treat all erts properties the same. Either ask the running VM or hard
coded into hipe (if XCOMP=yes). This will simplify and reduce the risk
of dangerous mismatches. One concern might be the added overhead
from more frequent calls to hipe_bifs:get_rts_param.
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Opaque recursive parameters are expanded faster.
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Expand parameters when needed only.
The opaqueness is removed from types expanded to any().
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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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Instead ask running VM for the value of THE_NON_VALUE,
which is different between opt and debug VM.
Same hipe compiler can now compile for both opt and debug VM.
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Thanks to ILYA Khlopotov for pointing the bug out.
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The example is provided by James Fish in
http://erlang.org/pipermail/erlang-questions/2014-December/082204.html.
Note that warnings with text such as "the _ variable breaks
opaqueness" are still possible.
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Re-insert logic for `erlang:make_fun/3` in `erl_bif_types`. It had
been removed in bd941f5 while type spec-ing `erlang.erl`. Type spec in
`erlang.erl` cannot express arity of returned fun based on value of
argument hence re-introducing logic in `erl_bif_types`.
Re-definition of logic in `erl_bif_types` follows approach in 9d870a0.
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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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* kostis/hipe-no-dial-warnings:
Eliminate a dialyzer warning
Simplify handling of o2 and o3 option expansion
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The test t_is_none() does not check for opaque types (and this is most
likely how it should be), why t_opaque() should never be called with
none().
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Comparing two operands for (in)equality is allowed if both operands
are of the same unknown opaque type. Since OTP 17, there is a warning
if the types of the operands have nothing in common (this cannot
happen before OTP 17). However, the warning says there is a test
between opaque types, which is wrong. The warning now states that the
comparison cannot evaluate to 'true', which is more consistent.
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In OTP 17 it is possible to mix types such as dict:dict() and
dict:dict(_, _) outside of the dict module (and similarly for some
other opaque types in STDLIB), but the results are unfortunately
possibly invalid warnings in users' code. In OTP 18 parameterized
opaque types with the same name but with different number of
parameters are no longer compatible when seen from outside of the
module where the types are declared.
The types in STDLIB have been updated accordingly; for instance
-opaque dict() :: dict(_, _).
has been replaced by
-type dict() :: dict(_, _).
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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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For quite some time now, this module generated a (quite harmless)
dialyzer warning. Comment out a clause which was actually unreachable.
While at it, do some small code refactorings here and there.
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A recent rewrite of some code in this file (commit 355f4b5)
exposed some dialyzer warnings of some code which is unreachable.
Indeed, checking whether one executes on an unsupported architecture
when expanding the 'o2' and 'o3' hipe compiler options is unnecessary
because that check is performed in the expansion of the 'o1' option
anyway. While at it, simplified the code a bit not to have a very
long case clause.
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* richcarl/avoid-try-native-load:
Update list of funcalls in kernel code_SUITE
Move architecture knowledge out of hipe loader
Avoid repeated calls to system_info in hipe loader
Avoid exception overhead if HiPE is disabled
HiPE help shouldn't modify the calling process
OTP-12816
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* kostis/llvm-now:
Replace call to erlang:now() with appropriate call to 18.0 BIF
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* kostis/cerl_pmatch:
Allow use of complete interface of cerl_pmatch module
OTP-12794
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* legoscia/dialyzer/cache-hipe-binaries/OTP-12779:
Dialyzer to cache results of HiPE compilation
Change hipe_bifs:system_crc/1 to hipe_bifs:system_crc/0
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The macro HIPE_SYSTEM_CRC used to contain a hidden cookie from the VM
that generated hipe_literals.hrl. This means that BEAM files containing
that macro would be tied to a particular version of the VM.
Change hipe_bifs:system_crc such that it doesn't require a hidden cookie
to return the desired value.
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Applications that use the new erl_anno module are depending on STDLIB 2.5.
Note that CosNotification, Megaco, SNMP, Xmerl, and Parsetools use the
erl_anno module via the Yecc parsers only (the header file in
lib/parsetools/include/yeccpre.hrl calls the erl_anno module).
HiPE does not call the erl_anno module, but uses an exported type.
We have chosen to make HiPE dependent on the erl_anno module.
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This reverts commit e09dd66dc4d89c62ddfd8c19791f9678d5d787c6.
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The cerl_pmatch module performs pattern matching compilation at the
level of Core Erlang. Functions that were not needed by the HiPE
compiler were ifdef-ed out. However, these functions may come handy
to other users; in particular a new testing tool currently under
development needs access to these functions.
While at it, added specs for these exported functions and also
strengthened the spec of another one.
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* sverk/hipe_match_wbin/OTP-12667:
erts: Add debug assertions for match state sanity
hipe: Add test for matching of writable binary
erts,hipe: Optimize away calls to emasculate_binary
erts,hipe: Fix bug in binary matching of writable binary
Conflicts:
erts/emulator/hipe/hipe_bif0.c
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Only call emasculate_binary if ProcBin.flags is set,
which means it's a writable binary.
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An opaque type ?opaque(_) was put in a list where #opaque{} was
expected.
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Seen symptom: Hipe compiled code with <<C/utf8, ...>> = Bin does sometimes
not match even though Bin contains a valid utf8 character. There might be
other possible binary matching symptoms, as the problem is not utf8
specific.
Problem: A writable binary was not "emasculated" when the matching started
(as it should) by the hipe compiled code.
Fix: Add a new primop emasculate_binary(Bin) that is called when
a matchstate is created.
ToDo: There are probably room for optimization. For example only call
emasculate_binary if ProcBin.flags is set.
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According to EEP-43 for maps, a 'badmap' exception should be
generated when an attempt is made to update non-map term such as:
<<>>#{a=>42}
That was not implemented in the OTP 17.
José Valim suggested that we should take the opportunity to
improve the errors coming from map operations:
http://erlang.org/pipermail/erlang-questions/2015-February/083588.html
This commit implement better errors from map operations similar
to his suggestion.
When a map update operation (Map#{...}) or a BIF that expects a map
is given a non-map term, the exception will be:
{badmap,Term}
This kind of exception is similar to the {badfun,Term} exception
from operations that expect a fun.
When a map operation requires a key that is not present in a map,
the following exception will be raised:
{badkey,Key}
José Valim suggested that the exception should be
{badkey,Key,Map}. We decided not to do that because the map
could potentially be huge and cause problems if the error
propagated through links to other processes.
For BIFs, it could be argued that the exceptions could be simply
'badmap' and 'badkey', because the bad map and bad key can be found in
the argument list for the BIF in the stack backtrace. However, for the
map update operation (Map#{...}), the bad map or bad key will not be
included in the stack backtrace, so that information must be included
in the exception reason itself. For consistency, the BIFs should raise
the same exceptions as update operation.
If more than one key is missing, it is undefined which of
keys that will be reported in the {badkey,Key} exception.
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