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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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# Conflicts:
# erts/emulator/beam/erl_process.c
# erts/emulator/beam/sys.h
# erts/emulator/sys/common/erl_check_io.c
# erts/emulator/sys/common/erl_check_io.h
# erts/emulator/sys/unix/sys.c
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Conflicts:
erts/emulator/sys/unix/sys.c
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* lukas/erts/fix_warnings:
Fix some clang warnings
Fix unused-functions warnings
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* maint:
Bug fixes of statistics(wall_clock) and statistics(runtime)
Conflicts:
erts/emulator/beam/erl_time_sup.c
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* rickard/statistics-time-fixes/OTP-14597/ERL-465:
Bug fixes of statistics(wall_clock) and statistics(runtime)
Conflicts:
erts/emulator/beam/erl_time_sup.c
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This refactor was done using the unifdef tool like this:
for file in $(find erts/ -name *.[ch]); do unifdef -t -f defile -o $file $file; done
where defile contained:
#define ERTS_SMP 1
#define USE_THREADS 1
#define DDLL_SMP 1
#define ERTS_HAVE_SMP_EMU 1
#define SMP 1
#define ERL_BITS_REENTRANT 1
#define ERTS_USE_ASYNC_READY_Q 1
#define FDBLOCK 1
#undef ERTS_POLL_NEED_ASYNC_INTERRUPT_SUPPORT
#define ERTS_POLL_ASYNC_INTERRUPT_SUPPORT 0
#define ERTS_POLL_USE_WAKEUP_PIPE 1
#define ERTS_POLL_USE_UPDATE_REQUESTS_QUEUE 1
#undef ERTS_HAVE_PLAIN_EMU
#undef ERTS_SIGNAL_STATE
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* john/erts/runtime-lcnt:
Document rt_mask and add warnings about copy_save
Add an emulator test suite for lock counting
Break erts_debug:lock_counters/1 into separate BIFs
Allow toggling lock counting at runtime
Move lock flags to a common header
Enable register_SUITE for lcnt builds
Enable lcnt smoke test on all builds that have lcnt enabled
Make lock counter info independent of the locks being counted
OTP-14412
OTP-13170
OTP-14413
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The implementation is still hidden behind ERTS_ENABLE_LOCK_COUNT, and
all categories are still enabled by default, but the actual counting can be
toggled at will.
OTP-13170
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The fix avoids registering the main thread as an emulator thread
on MacOSX. This since WX steals the main thread for its own usage
on MacOSX, and use the thread as an ordinary driver thread.
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This allows us to enable/disable lock counting at will, and greatly improves
the performance of erts_debug:lock_counters/1 since we no longer have to
worry about the lock counters "dying" while we're enumerating them.
OTP-14412
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* maint:
Updated OTP version
Prepare release
Do not ignore SIGTERM when VM has been started with +Bi
Conflicts:
OTP_VERSION
erts/emulator/sys/unix/sys.c
erts/vsn.mk
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* lukas/erts/20_minor_fixes:
erts: Rebuild etc executables if config.h changes
erts: Fix new gcc warning in check io
kernel: Add mem check to prim_file:large_write tc
erts: Fix two compiler warnings on OS X
erts: Fix erts_debug:df function info output
erts: Get rid of some unused function warnings on os x
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OTP-14331
* rickard/pcre-8.40:
Update documentation
Update README.pcre_update.md
Stack guard for PCRE
Adjust for incompatibility between PCRE 8.40 and perl 5.22.1
Generate re replacement and split tests with perl vsn 5.22.1
Fix re_SUITE:pcre_compile_workspace_overflow/1
Skip line with lockout of modifiers in PCRE tests
Update tests for PCRE version 8.40
Update PCRE to version 8.40
Conflicts:
erts/emulator/beam/beam_debug.c
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Allocations and message sending are now scheduled by a signal,
via a signal state bitmap, instead of doing it directly in the signal handler.
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The signal handler will now schedule a sigterm message instead of sending
the message in the signal handler. The signal handler must refrain from
memory allocations and thus the event is scheduled.
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Conflicts:
erts/emulator/beam/erl_binary.h
erts/emulator/beam/erl_monitors.c
erts/emulator/beam/erl_nif.c
erts/emulator/beam/global.h
erts/emulator/test/nif_SUITE_data/nif_SUITE.c
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to negative int as error and positive as success.
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This fixes commit f0867aa2ccbbf5677e0577bba08f8b7bc53ec0ed
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Conflicts:
OTP_VERSION
erts/doc/src/notes.xml
erts/emulator/sys/unix/erl_unix_sys.h
erts/emulator/sys/unix/sys.c
erts/vsn.mk
lib/crypto/c_src/crypto.c
lib/crypto/doc/src/notes.xml
lib/crypto/vsn.mk
lib/inets/doc/src/notes.xml
lib/inets/vsn.mk
lib/ssh/doc/src/notes.xml
lib/ssh/src/ssh.app.src
lib/ssh/src/ssh_connection_handler.erl
lib/ssh/vsn.mk
otp_versions.table
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* Remove SIGILL from signal whitelist
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* move signal handler setup
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* move signal handler setup
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A received SIGHUP signal to beam will generate a '{notify, sighup}' message
to the registered process 'erl_signal_server'. 'erl_signal_server' is a
gen_event process.
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* and some minor refactoring
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* egil/erts/handle-sigterm-nicely/OTP-14085:
erts: Document SIGTERM handler
erts: Add SIGTERM signal handler
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A received SIGTERM signal to beam will generate a {'stop','stop'} message
to the init process and terminate the beam nicely.
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