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We can safely tell when a test_arity or is_record instruction is
superflous by keeping track of whether the size is exactly known
or not.
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Reduce register shuffling in receive clauses
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The type optimizations for is_record and test_arity checked whether
the arity was equal to the size stored in the type information,
which is incorrect since said size is the *minimum* size of the
tuple (as determined by previous instructions) and not its exact
size.
A future patch to the 'master' branch will restore these
optimizations in a safe manner.
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Conflicts:
lib/ssl/src/tls_connection.erl
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* ingela/ssl/error-handling-race/ERL-539/OTP-14852:
ssl: Prevent error handling race condition
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ERL-539
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Fix GC bug for HiPE primop bs_put_utf8
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by preventing it from doing GC, which generated code relies on.
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Previously we accepted trailing NULs, which was backwards compatible
as such usage never resulted in misbehavior in the first place. The
downside is that it prevented erts_native_filename_need from
returning an accurate number of *actual characters*, needlessly
complicating encoding-agnostic code like erts_osenv.
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putenv(3) and friends aren't thread-safe regardless of how you slice
it; a global lock around all environment operations (like before)
keeps things safe as far as our own operations go, but we have
absolutely no control over what libc or a library dragged in by a
driver/NIF does -- they're free to call getenv(3) or putenv(3)
without honoring our lock.
This commit solves this by setting up an "emulated" environment which
can't be touched without going through our interfaces. Third-party
libraries can still shoot themselves in the foot but benign uses of
os:putenv/2 will no longer risk crashing the emulator.
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* maint:
ssh: ssh_dbg updates
ssh: Better reports in some test case failures
ssh: Tests - timeout catches external ssh that does not disconnect
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* hans/ssh/cuddle_ssh_test:
ssh: Better reports in some test case failures
ssh: Tests - timeout catches external ssh that does not disconnect
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* hans/ssh/cuddle_ssh_dbg:
ssh: ssh_dbg updates
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* maint:
tools: Correct a counting bug in Cover
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* hasse/cover/fix_counting/OTP-14817/PR-1641:
tools: Correct a counting bug in Cover
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into maint
* origin/ingela/inets/remove-legacy-test-suite:
inets: Remove old legacy SUITE
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See also PR #1641, https://github.com/erlang/otp/pull/1641.
The bug was introduced in commit ab435488a (Erlang/OTP 18).
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* hasse/stdlib/gen_server_bench:
stdlib: Optimize gen a little
stdlib: Introduce gen_server benchmark
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jinterface: add package name for Java 9
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false should be never, false not found in the source code
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* raimo/ssl-dist-bench/OTP-14657:
Skip ssl_bench_SUITE, normally
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* ingela/dtls-cuddling:
dtls: Correct UDP listener cleanup
dtls: Correct return value in UDP listener initialization
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* ingela/DTLS/retransmission-timers:
dtls: Use repeat_state to make sure retransmission timer is reset
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* ingela/Jxck/PR-1656/OTP-14843:
remove duplicate operation for decode certificate
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Handle a few more instructions in beam_utils. That will allow
beam_reorder to reorder more instructions, delaying get_tuple_element
instructions and reducing register shuffling in receive clauses.
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v3_codegen: Don't let exit BIFs force a stack frame
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completely deprecated operation with no effect.
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Remove one of the duplicate word "use"
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* dgud/kernel/refc_sched_wall_time/OTP-11694:
test: spawn scheduler_wall_time flag holder
Turn on scheduler_wall_time in an alive process
Redirect system_flag(scheduler_wall_time,_) to kernel_refc
kernel: add a resource reference counter
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Can not start via rpc any more without spawning a keep alive process,
since it will stop collecting when process dies.
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scheduler_wall_time is ref-counted so it will turn off
if process dies, keep the process that turns it on alive.
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