signal(2) is portable for SIG_DFL and SIG_IGN, so we do not
need the extra code for sigaction(2).
Also, execve will reset all signal handlers to default
anyways, so there is little sense in preserving old
signal handler besides SIG_IGN.
Hopefully this makes the code easier-to-understand and
maintain.
* process.c (disable_child_handler_fork_child): simplify
[ruby-core:75781] [Misc #12439]
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* process.c (rb_f_abort): [DOC] Process.abort is a singleton
method of Process, but not an instance method.
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and define CONSTFUNC and PUREFUNC if available.
Note that I don't add those options as default because
it still shows many false-positive (it seems not to consider
longjmp).
* vm_eval.c (stack_check): get rb_thread_t* as an argument
to avoid duplicate call of GET_THREAD().
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* process.c (rb_exec_getargs): honor the expected argument types
over the conversion method. the basic language functionality
should be robust. [ruby-core:75388] [Bug #12355]
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This only happens on the !POSIX_SIGNAL case; but one may
test with the following:
--- a/process.c
+++ b/process.c
@@ -3479,6 +3479,7 @@ disable_child_handler_fork_parent(struct child_handler_disabler_state *old)
#endif
}
+#undef POSIX_SIGNAL
/* This function should be async-signal-safe. Actually it is. */
static int
disable_child_handler_fork_child(struct child_handler_disabler_state *old, char *errmsg, size_t errmsg_buflen)
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* process.c: use rb_check_arity instead of rb_scan_args for simple
optional arguments.
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* file.c, io.c, util.c: prefer rb_syserr_fail with saved errno
over setting errno then call rb_sys_fail, not to be clobbered
potentially and to reduce thread local errno accesses.
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* process.c (rb_f_spawn): Be more specific regarding "other
values" by having "non-zero positive integers" Add nil, the
default value, as a possible value and what it means.
Try to use more consistent language.
[Fix GH-1008]
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* process.c (rb_waitpid): do not release GVL when WNOHANG is set,
it should return immediately without blocking.
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* process.c (rb_execarg_parent_start1): raise with the target path
name when open() failed.
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* process.c (rb_exec_fail): raise with the target directory name
when chdir() failed. pointed out by sorah.
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Shutting down the timer thread now always closes pipes to free FDs.
In fact, we close the write ends of the pipes is done in the main
RubyVM to signal the timer thread shutdown.
To effectively close pipes, we implement userspace locks via
atomics to force the pipe closing thread to wait on any signal
handlers which may be waking up.
While we're at it, improve robustness during resource exhaustion and
allow it to limp along non-fatally if restarting a timer thread
fails.
This reverts r51268
Note: this change is tested with VM_CHECK_MODE 1 in vm_core.h
* process.c (close_unless_reserved): add extra check
(dup2_with_divert): remove
(redirect_dup2): use dup2 without divert
(before_exec_non_async_signal_safe): adjust call + comment
(rb_f_exec): stop timer thread for all OSes
(rb_exec_without_timer_thread): remove
* eval.c (ruby_cleanup): adjust call
* thread.c (rb_thread_stop_timer_thread): always close pipes
* thread_pthread.c (struct timer_thread_pipe): add writing field,
mark owner_process volatile for signal handlers
(rb_thread_wakeup_timer_thread_fd): check valid FD
(rb_thread_wakeup_timer_thread): set writing flag to prevent close
(rb_thread_wakeup_timer_thread_low): ditto
(CLOSE_INVALIDATE): new macro
(close_invalidate): new function
(close_communication_pipe): removed
(setup_communication_pipe_internal): make errors non-fatal
(setup_communication_pipe): ditto
(thread_timer): close reading ends inside timer thread
(rb_thread_create_timer_thread): make errors non-fatal
(native_stop_timer_thread): close write ends only, always,
wait for signal handlers to finish
(rb_divert_reserved_fd): remove
* thread_win32.c (native_stop_timer_thread): adjust (untested)
(rb_divert_reserved_fd): remove
* vm_core.h: adjust prototype
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seems that rb_bug_errno() is called in sigpipe() intentionally.
https://gist.github.com/sorah/831169
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with one of the timer thread FDs, the internal FD is diverted.
[Bug #11336] [ruby-core:69886] [Bug #11350] [ruby-core:69961]
* process.c (dup2_with_divert): new function for the above purpose.
* thread_pthread.c (rb_divert_reserved_fd): new function for
diverting reserved FD. If the given FD is the same as one of the
reserved FDs, the reserved FD number is internally changed.
It returns -1 when error. Otherwise, returns 0. It also returns
0 if there is no need to change reserved FD number.
* thread_win32.c (rb_divert_reserved_fd): always returns 0 because
of no reserved FDs.
* internal.h (rb_divert_reserved_fd): prototype declaration.
It is Ruby internal use only.
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reserved FD. It should be closed in the exec system call due to the
O_CLOEXEC or FD_CLOEXEC flag. [Bug #11353] [ruby-core:69977]
* process.c (close_unless_reserved): new function to close FD unless
it is reserved for internal communication.
* thread_pthread.c (rb_reserved_fd_p): should check owner_process pid
to avoid false positive in forked child process.
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used on every OS, not only on Mac OS X or Haiku, to prevent
timer thread communications using file descriptor 3 after
setting redirection of the fd 3 before calling exec.
[Bug #11336] [ruby-core:69886]
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to generate envp_str anytime on Solaris 10 (or earlier version
of Solaris) to avoid calling execv() which is async-signal unsafe
on Solaris 10. [Bug #11265] [ruby-dev:49089]
* process.c (exec_with_sh, proc_exec_cmd): On Solaris 10,
because ALWAYS_NEED_ENVP is 1 and envp_str is always generated,
execv() in exec_with_sh() and proc_exec_cmd() are never called.
To guarantee this, execv() is replaced by a macro to print
out error message on Solaris 10.
* process.c (proc_exec_sh): Because proc_exec_sh() may be called
by rb_proc_exec() with envp_str = Qfalse, execl() is replaced
by a macro that calls execle() with "extern char **environ"
traditional global variable on Solaris 10.
TODO: This may be unsafe and sholud be changed
in the future.
Although rb_proc_exec() is not used from inside current version
of ruby, it may be called by third-party extensions.
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* process.c (rb_spawn_process): do not discard global escape
status. [ruby-core:69304] [Bug #11166]
* process.c (rb_execarg_spawn): extract the start procedure in a
parent process with ensuring the end procedure.
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* process.c (initgroups): not declared on cygwin if _POSIX_SOURCE
or _XOPEN_SOURCE are defined.
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process blocking when opening a named pipe.
(open_func): New function.
(rb_execarg_parent_start1): Extracted from rb_execarg_parent_start and
use rb_thread_call_without_gvl2 to release GVL when opening a file.
(rb_execarg_parent_start): Invoke rb_execarg_parent_start1 via
rb_protect and invoke rb_execarg_parent_end when error.
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* process.c: "spawn" opens files in the parent process.
(check_exec_redirect): Add an placeholder for fd in parameters
for fd_open.
(check_exec_fds_1): Delete fd_open condition.
(check_exec_fds): Don't call check_exec_fds_1 with fd_open.
(rb_execarg_parent_start): Open files specified as "spawn" options
and add "dup2" options.
(rb_execarg_parent_end): New function to close opened fds.
(run_exec_open): Removed.
(rb_execarg_run_options): Don't call run_exec_open.
(rb_spawn_internal): Call rb_execarg_parent_end.
* io.c (pipe_open): Call rb_execarg_parent_end.
* ext/pty/pty.c (establishShell): Call rb_execarg_parent_end.
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* hash.c (env_aset): state that ENV keys must be strings.
* process.c (rb_f_spawn): ditto. [ruby-core:68146] [Bug #10859]
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It seems waitpid() is universaly available on POSIX platforms.
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* process.c (rb_fork_async_signal_safe): remove initialized but
never assigned local variables.
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