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process_info/1 retrieves a number of properties related to a process,
including the list of messages in its mailbox. This is potentially
unsafe if the target process has a large number of queued messages:
- there is no a priori upper bound on the amount of memory being
allocated to hold that list, and
- the loop to retrieve the messages is uninterruptible, so the
Erlang scheduler where this executes blocks for the duration
We've seen process_info/1 bring down heavily loaded nodes on more
than one occasion. At least once it appeared to have blocked the
Erlang heart process from executing, causing the external heart to
kill the VM.
Consequently this removes 'messages' from the list of process_info
tags to retrieve for process_info/1. Note that process_info/1 still
retrieves 'message_queue_len', and process_info/2 can still retrieve
'messages' when asked to.
A few places in the OTP libraries need minor adjustments, since they
want 'message_queue_len' but compute it from the length of the list
of messages.
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* sverker/erts/more-crash-dump-info/OTP-14820:
erts,observer: Add port-suspended pids to crash dump
erts,observer: Add port states and flags to crash dump
erts,observer: Add dirty schedulers to crash dump
observer: Refactor get_schedulerinfo1
erts,observer: Add more port info to crash dump
erts: Cleanup dump_process_info()
erts: Include failing garbing process in crash dump
erts: Remove unused args to collect_live_heap_frags
erts: Add binary vheap sizes to crash dump
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* sverker/enif_self-doc:
erts: Clarify enif_self docs
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* lukas/kernel/dist_SUITE_corefile_ignore:
kernel: Ignore cores in erl_distribution_SUITE
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* lukas/erts/dirty_trace_clean_fix/OTP-14938:
erts: Delay cleanup of removed tracer on dirty scheds
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It is not simple to do the correct de-allocation on
a dirty schedulers, so we just delay it until this
process runs on a normal scheduler.
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Reject loading modules with slash in name
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by testing F_SENSITIVE only once.
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Exclude garbing processes, EXCEPT if run by crash dumping thread
in which case we assume the heap is healthy
without any move markers yet/left.
Switched order between (allocating) setup_rootset()
and (move marking) collect_live_heap_frags().
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When supplied without an enclosing list, bitstrings were returned
as-is instead of badarging.
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A binary is a binary as long as its size in bits is evenly divisible
by 8, regardless of whether it has a bit offset or not.
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When supplied without an enclosing list, bitstrings were silently
truncated to [] instead of badarging.
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This has always worked but we lacked test coverage for it.
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or backslash on Windows.
Purpose: Prevent tricks to get hostile code running.
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Huge inputs weren't particularly useful and took forever to run, so
this commit winds it down to a more sane level that still causes
lots of yielding.
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* maint-20:
Updated OTP version
Update release notes
Update version numbers
erts: Add system_flags(erts_alloc,"+M?sbct *")
erts: Add age order first fit allocator strategies
erts: Refactor erl_ao_firstfit_alloc
erts: Add migration options "acnl" and "acfml"
kernel: Add os:cmd/2 with max_size option
erts: Add more stats for mbcs_pool
erts: Fix alloc_SUITE:migration
stdlib: Make ets_SUITE memory check try again
erts: Improve carrier pool search
erts: Improve alloc_SUITE:migration
erts: Refactor carrier dealloc migration
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fmt_double() may write up to 8 characters into its format_str[]
buffer, which however only has room for 7 characters.
This case could be triggered by a call to erts_printf_format() with
any floating-point format that also includes #, and + or a space,
which may be uncommon, but a nif or driver could issue it.
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into 'sverker/maint-20/alloc-n-migration/ERIERL-88'
OTP-14915
OTP-14916
OTP-14917
OTP-14918
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into 'sverker/maint-19/alloc-n-migration/ERIERL-88'
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to change sbct limit in runtime for chosen allocator type.
With great power comes great responsibility.
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ageffcaoff: Age First Fit Carrier, Address Order First Fit (within carrier)
ageffcbf : Age First Fit Carrier, Best Fit (within carrier)
ageffcaobf: Age First Fit Carrier, Address Order Best Fit (within carrier)
Prefer old carriers, the older the better.
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In preparation for carrier age order.
Change 'flavor' to 'blk_order' and 'crr_order'.
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acnl: Abandon Carrier Nr Limit
acfml: Abandon Carrier Free block Min Limit
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Fix rounding bug in float_to_list/2
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Some bash versions segfault when a unicode argument is given
so we ignore cores created by nodes spawned by this testcase.
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particularly slow erlc when compiler is hipe compiled.
hipe_unified_loader:load did not patch external call sites
and instead caused a double hipe mode switch per call.
hipe_unified_loader:load is only used
for early modules first loaded as beam
and by code:atomic_load and friends.
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* fhunleth/binary_to_integer_chec/PR-1671/OTP-14879:
Fail if ':' is passed to binary_to_integer/2
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* hasse/stdlib/unicode_stacktrace/OTP-14847/ERL-553:
stdlib: Handle Unicode when formatting stacktraces
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Replace long long with Uint64
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Example symptom:
1> float_to_list(0.145, [{decimals,1}]).
"0.2"
There were two problems in sys_double_to_chars_fast
1. Most serious was adding 0.55555555 / (10^D) instead of 0.5 / (10^D)
which imposed a 5.5% risk of a faulty rounding up.
2. Using fixpoint for frac_part which lost significant bits if F < 0.5
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Sign character was not accounted for.
Ex:
float_to_list(-3.1265538967899625e+69, [{decimals,16}]).
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See also ERL-553 and ERL-544 (commit c3ddb0f).
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* rickard/file-encoding-stacktraces/OTP-14847/ERL-544:
Fix encoding of filenames in stacktraces
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