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* sverker/purge-vfork:
erts: Remove obsolete paragraph about ERL_NO_VFORK
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* maint-21:
Updated OTP version
Update release notes
Update version numbers
Eliminate a crash in the beam_jump pass
stdlib: Fix a 'chars_limit' bug
Fix a race condition when generating async operation ids
Fix internal compiler error for map_get/2
beam_type: Fix unsafe optimization
public_key: Remove moduli 5121 and 7167 Thoose were added by 598629aeba9de98e8cdf5637043eb34e5d407751 but are not universaly supported.
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from erlang:open_port/2 docs.
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* maint-20:
Updated OTP version
Prepare release
kernel: Fix tick count bug when pending writes
kernel: Send tick to hidden node even if pending writes
ic: Fix buffer overrun bug in oe_ei_encode_atom
erl_interface: Fix simultaneous connection setup
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* john/erts/inet-drv-race/OTP-15158/ERL-654:
Fix a race condition when generating async operation ids
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* john/erts/merge-OTP-15067:
Don't enqueue system tasks if target process is in fail_state
Fix erroneous schedule of freed/exiting processes
Fix deadlock in run queue evacuation
Fix memory leak of processes that died in the run queue
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Use erlang:system_info(ets_count) and improve docs
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* sverker/cerl-fixing:
erts: Remove "-pz $PRELOADED" arguments added by cerl
erts: Remove dead code in cerl script
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into maint-20
* john/erts/fix-process-schedule-after-free/OTP-15067/ERL-573:
Don't enqueue system tasks if target process is in fail_state
Fix erroneous schedule of freed/exiting processes
Fix deadlock in run queue evacuation
Fix memory leak of processes that died in the run queue
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Add missing bracket to erlang:spawn_opt/4 docs priority tuple option
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The counter used for generating async operation ids was a plain int
shared between all ports, which was incorrect but mostly worked
fine since the ids only had to be unique on a per-port basis.
However, some compilers (notably GCC 8.1.1) generated code that
assumed that this value didn't change between reads. Using a
shortened version of enq_async_w_tmo as an example:
int id = async_ref++;
op->id = id; //A
return id; //B
In GCC 7 and earlier, `async_ref` would be read once and assigned
to `id` before being incremented, which kept the values at A and B
consistent. In GCC 8, `async_ref` was read when assigned at A and
read again at B, and then incremented, which made them inconsistent
if we raced with another port.
This commit fixes the issue by removing `async_ref` altogether and
replacing it with a per-port counter which makes it impossible to
race with someone else.
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* maint-21:
Updated OTP version
Prepare release
Fix unsafe optimization when running beam_block the second time
Fix environment case sensitivity issues on Windows
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* john/erts/merge-OTP-15067:
Don't enqueue system tasks if target process is in fail_state
Fix erroneous schedule of freed/exiting processes
Fix deadlock in run queue evacuation
Fix memory leak of processes that died in the run queue
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* lukas/erts/etp-aux-work-fixes:
erts: Update etp-commands with correct aux_flags
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* origin/henrik/Update-copyright:
Update copyright year
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* lukas/erts/fix_vxworks_configure:
erts: Fix vxworks configure broken by corba removal
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* sverker/macos-select-fd-bug:
erts: Fix MacOS pollset bug
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* maint:
Updated OTP version
Prepare release
Add test case
Parse #mc_new_type{}s before definitions_loop/2
erts: Fix race between ets table deletion and auto-unfix
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into john/erts/merge-OTP-15067
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The fail state wasn't re-checked in the state change loop; only
the FREE state was checked. In addition to that, we would leave
the task in the queue when bailing out which could lead to a
double-free.
This commit backports active_sys_enqueue from master to make it
easier to merge onwards.
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When scheduled out, the process was never checked for the FREE state
before rescheduling, which meant that a system task could sneak in
and cause a double-free later on.
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that could cause clearing of fd-bits past allocated bit-vectors.
Bug introduced on master by
988f5f5e8061ce2e135a314ca782788eda478a06
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* sverker/ets-auto-unfix-delete-race/OTP-15109:
erts: Fix race between ets table deletion and auto-unfix
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to actually run remote on the slave node that it starts.
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* sverker/process-info-exiting:
erts: Fix incoming signal handling for exiting process
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Seen symptom:
handle_process_info() called with is_alive=1 on exiting process,
reading broken Process.u.initial.module atom
overwritten by Process.u.terminate pointer.
Solution:
Let erts_proc_sig_handle_incoming() do nothing if process is
already exiting.
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Fix use-after-free on Windows in escript
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* lukas/kernel/logger-config/OTP-13295:
erts: Fix emulator log messages to use erlang:system_time
kernel: Add LOGGER_SERVER_TAG to logger_server
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It caused problems when starting with -rr and other arguments.
Not sure what purpose it served
as -pz $PRELOADED is not passed by default by "erl".
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* sverker/ets-auto-unfix-delete-race/OTP-15109:
erts: Fix race between ets table deletion and auto-unfix
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Bug exists since ets-refs were introduced in 20.0
0d6dc895744c34c9c52fd42f4801a8a941864ae3.
Problem:
1. Process A fixates table T.
2. Process B starts deleting table T (either by ets:delete or exit)
and does tid_clear().
3. Process A exits and does proc_cleanup_fixed_table()
and get NULL from btid2tab() and deallocates DbFixation.
4. Process B continues deleting table in free_fixations_locked()
and finds the deallocated DbFixation in the fixing_procs tree.
Solution:
Wait with tid_clear() until after free_fixations_locked()
has traversed the fixing_procs tree.
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* sverker/broken-sig-queue:
erts: Cleanup in proc_queue_signal
erts: Fix broken signal queue
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