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maint-17
* sverker/r16/binary_to_atom-utf8-crash/ERL-474/OTP-14590:
erts: Fix crash in binary_to_atom/term for invalid utf8
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* sverker/big-bxor-bug/ERL-450/OTP-14514:
erts: Fix bug in bxor of a big negative number
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* sverker/bin2term-zlib-bug/ERL-340/OTP-14159:
erts: Fix binary_to_term for compressed and zlib >= v1.2.9
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* rickard/thr-prgr-unmanaged-delay-bug/OTP-13869:
Fix erts_thr_progress_unmanaged_delay()
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* rickard/drv-send-term-thr-bug/OTP-13866:
Fix thread calls to erl_drv_send_term()/erl_drv_output_term()
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* rickard/port-sig-dropped-fix/OTP-13424:
Fix implementation of dropped signal to port
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such as a sub-binary, of a correct utf8 string,
that ends in the middle of a character.
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Wrong result for
(X bsl WS) bxor Y.
where
X is any negative integer
Y is any integer that does not require more words than X
WS is erlang:system_info(wordsize) or larger
Fix: The subtraction of 1 (for 2-complement conversion)
must be carried along all the way to the last words.
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Problem: z_stream was incorrectly copied with memcpy
which just happened to work with zlib < v1.2.9.
Solution: Avoid copying z_stream.
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Thread progress leader update did not cache current unmanaged index
when waiting for unmanaged threads. This caused
erts_thr_progress_unmanaged_delay() to stop working until a new leader
took over.
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ERTS_PRINT_INVALID prevented file descriptor 0 to be used which
could cause an empty crash dump.
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* sverk/trace-process_dump-matchstate-17/OTP-12968:
erts: Add testcase for tracing whith 'process_dump'
erts: Fix bug when tracing with 'process_dump'
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of a process with a matchstate on the stack.
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If the process stack contained a match state
the print function would crash the vm as it was not
recognized by tag_val_def().
Add new MATCHSTATE_DEF returned by tag_val_def().
All other callers either ignore it or has a default
clause to handle invalid terms.
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* rickard/non-smp-trace-port-exit-bug/OTP-12889:
Teach non-smp VM how to deal with trace port crash
Test case testing crash in tracer port
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* sverk/poll-lost-wakeup/OTP-12859:
erts: Fix race in poller thread wake up
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During code purging and check_process_code, the checking of the binary reference
embedded in the match binary state was omitted for the tracing tests. This would cause
the binary match state to reference deallocated memory.
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* sverk/large-list_to_integer-bug/OTP-12624:
erts: Fix bug in list_to_integer for very large strings
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* egil/maint/process_dictionary-initial-size/OTP-12535:
erts: Document option 'hpds'
erts: Enable command line argument for initial pd size
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list_to_integer(lists:duplicate(10000000,$0)).
crashed due to overflow when calculating nr heap words.
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Use '+hpds size' to set initial process dictionary size for spawned processes.
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Comparison of exact terms could cause faulty term tests.
This was caused by a faulty (too small) internal type.
Symptom:
-1 = erts_internal:cmp_term(2147483648,0). %% wrong
Correct:
1 = erts_internal:cmp_term(2147483648,0).
Reported-by: Jesper Louis Andersen
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* nox/fix-port_info-race:
Fix a race condition when calling port_info/1
OTP-12587
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* nlmills/cleanup:
Remove unused time macros from efile_drv
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* wmalik/minor-fixes:
Fix proc_lib doc
Remove commented out code
Fix make_hash description
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This variable hold the values returned by erlang:port_info/1 and
shouldn't be static.
Reported-by: Heinz Nikolaus Gies
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* rickard/port_control_flags_crash/OTP-12544:
Make access to control_flags safe in non-smp emulator
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All uses of these macros were removed in
commit c3a615aa2da09bc3a0575e973959f800460a63de.
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* mikpe/hipe-mfait-rwlock:
hipe: change mfa_info_table lock to rwmutex
OTP-12557
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* mikpe/avoid-oversize-bignums:
don't leave a heap hole in erts_bs_get_integer_2
don't create oversize bignums in binary matching
OTP-12556
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* leoliu/master:
Two minor fixes
OTP-12545
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* Fix documentation on $char for unicode
* Remove duplicate declaration for erts_encode_ext_dist_header_size
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The hipe_mfa_info_table lock is currently a mutex, causing
unnecessary contention and serialization of lookups for
apply-like constructs.
- change the lock from a mutex to an rwmutex
- split hipe_get_na_nofail_locked into a "try" path which
only needs a read lock, and a "slow" path which requires
a write lock
- reimplement hipe_get_na_nofail (used by apply ops etc) to
first call the "try" path with a read lock, and if that
fails the "slow" path with a write lock
- reimplement hipe_get_na_nofail_locked (used by maintenance
code) to call the "try" path and then optionally the "slow"
path, but without taking locks since its caller already has
the write lock
- adjust remaining lock ops to take/release full write lock
- use _rwlocked as suffix on functions requiring a write lock
- change hipe_mfa_get_trampoline to call get_locked not put_locked,
allowing it to take a read lock instead of a write lock
- change hipe_find_mfa_from_ra() to only take a read lock
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An extra '}' were printed in remote links.
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Reset p->htop in the oversize bignum error case to avoid leaving a
hole in the heap, which would crash the debug emulator.
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Bignums are artifically restricted in size. Arithmetic and logical
operations check the sizes of resulting bignums, and turn oversize
results into system_limit exceptions.
However, this check is not performed when bignums are constructed by
binary matching. The consequence is that such matchings can construct
oversize bignums that satisfy is_integer/1 yet don't work. Performing
arithmetic such as Term - 0 fails with a system_limit exception. Worse,
performing a logical operation such as Term band Term results in [].
The latter occurs because the size checking (e.g. in erts_band()) is
a simple ASSERT(is_not_nil(...)) on the result of the bignum operation,
which internally is [] (NIL) in the case of oversize results. However,
ASSERT is a no-op in release builds, so the error goes unnoticed and []
is returned as the result of the band/2.
This patch addresses this by preventing oversize bignums from entering
the VM via binary matching:
- the internal bytes_to_big() procedure is augmented to return NIL for
oversize results, just like big_norm()
- callers of bytes_to_big() are augmented to check for NIL returns and
signal errors in those cases
- erts_bs_get_integer_2() can only fail with badmatch, so that is the
Erlang-level result of oversize bignums from binary matches
- big_SUITE.erl is extended with a test case that fails without this
fix (no error signalled) and passes with it (badmatch occurs)
Credit goes to Nico Kruber for the initial bug report.
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* egil/fix-getifaddrs-realloc/OTP-12445:
erts: Fix getifaddrs realloc ptr mismatch
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* egil/fix-child_setup-close/OTP-12446:
erts: Use closefrom() if available when closing fds
erts: Don't close all fds twice in child_setup
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When a buffer was exhausted and subsequently a realloc, we could get
an invalid pointer.
For this to occur we would need to have a realloc to lower adresses.
The symptom would be garbage returned from erlang:port_control(Port, 25, [])
(prim_inet:getifaddrs(Port) resulting in a badarg) or a segmentation fault.
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closefrom() was only used in the vfork() case before, now also
used in the fork() case.
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