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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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The standard search order does not include the directory that the
loaded DLL resides in, requiring dirty $PATH hacks to get things
working, which is not an option now that os:putenv/2 is divorced
from the OS environment.
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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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When a dirty NIF is executed a "schedule in" trace event is
generated, which may in turn result in a generic system task being
created, causing the process to be scheduled out as it can't run
dirty with pending tasks.
This is usually fine since said system task is seldom created, but
ERTS_FORCE_ENIF_SEND_DELAY was de-facto always on for debug builds,
causing the process to bounce between dirty and normal schedulers
forever.
This commit is not a complete fix and it can go off the rails even
on normal builds; if there's a lot of dirty jobs lined up and the
receiver's msgq lock happens to be busy at the wrong time, the
additional trace messages generated through this will hammer the
lock and keep everything bouncing.
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Most functions return this if they're given an invalid path, eg. if
they contain "<" or ">". ENOENT may seem like a strange translation,
but that's what open(2) returns when fed garbage, so we'll roll with
that.
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Conflicts:
lib/ssl/src/ssl_cipher.erl
lib/ssl/src/ssl_handshake.erl
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erlexec adds $ROOT/erts-<vsn>/bin and $ROOT/bin first in $PATH on
startup, but didn't do so if they were in the $PATH already, which
meant that the bindir didn't point to the current release after a
downgrade.
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* ingela/ssl/cipher-suites/OTP-14749:
ssl: Use maps for cipher suites internally
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This is a preparation for improvements to come in option handling and
support for TLS-1.3
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* peppe/common_test/auto_cleanup/OTP-13832:
Add tests and doc for the new remaining_test_procs function
Implement function that finds disposable test processes
Tag Common Test system processes using process dictionary
Add app name tag in process dictionary
OTP-13832
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Conflicts:
lib/ssl/src/inet_tls_dist.erl
lib/ssl/src/ssl_dist_sup.erl
lib/ssl/src/ssl_tls_dist_proxy.erl
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* origin/raimo/ssl-dist-bench/OTP-14657:
Write SSL distribution benchmarks
Polish SSL distribution
Handle whitebox test message
Correct distribution doc
Use SNI when connecting
Use -ssl_dist_optfile options
Read in -ssl_dist_optfile to ETS
Facilitate test certs with common root
Stop checking DNS name for SNI
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* raimo/ssl-dist-optfile-backport/OTP-14657:
Use SNI when connecting
Use -ssl_dist_optfile options
Read in -ssl_dist_optfile to ETS
Facilitate test certs with common root
Stop checking DNS name for SNI
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* peppe/common_test/index_last_test/OTP-14281:
Show links to latest test run by using an html redirection file
OTP-14281
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maint
* lars/crypto/add-engine-ctrl-cmd-string-to-api/OTP-14801:
[crypto] Add engine_ctrl_cmd_string() to API
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* maint:
mnesia: Fix error handling in abort write
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* dgud/mnesia/backup-error-handling/OTP-14776:
mnesia: Fix error handling in abort write
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add hibernate_after to the gen options type spec
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* maint:
debugger: Do not quote variables and button names in windows
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* hasse/debugger/fix_unicode/OTP-14802:
debugger: Do not quote variables and button names in windows
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* maint:
fix output formatting in several HiPE debug BIFs
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fix output formatting in several HiPE debug BIFs
OTP-14804
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* bjorn/compiler/clean-up-codegen:
bs_match_SUITE: Cover more clauses in v3_codegen:bs_rename_ctx/4
Clean up and comment code generation for basic blocks
Stop trying to maximize the use of x(0)
Clean up collection of basic blocks
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