During fork, it's possible that threads with root fibers are terminated,
but fiber state is not updated. `fiber_verify` will subsequently fail. We
forcefully enter the FIBER_TERMINATED state when terminating the root
fiber.
If `vm_stack` is left dangling in a forked process, the gc attempts to scan
it, but it is invalid and will cause a segfault. Therefore, we clear it
before forking.
In order to simplify this, `rb_ec_clear_vm_stack` was introduced.
r59829 stopped clearing stack_start and enabled the code for
!FIBER_USE_NATIVE, but we need to do the same for register_stack_start
on ia64, otherwise we end up with NULL in cont_save_machine_stack.
Closes: https://github.com/ruby/ruby/pull/2155
This allows raising exceptions in another fiber, similarly to
Thread#raise.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66610 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* cont.c (cont_restore_thread): cause error if trace-status is changed.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66007 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* vm_trace.c (rb_tracepoint_enable_for_target): support targetting
TracePoint. [Feature #15289]
Tragetting TracePoint is only enabled on specified method, proc
and so on, example: `tp.enable(target: code)`.
`code` should be consisted of InstructionSeuqnece (iseq)
(RubyVM::InstructionSeuqnece.of(code) should not return nil)
If code is a tree of iseq, TracePoint is enabled on all of
iseqs in a tree.
Enabled tragetting TracePoints can not enabled again with
and without target.
* vm_core.h (rb_iseq_t): introduce `rb_iseq_t::local_hooks`
to store local hooks.
`rb_iseq_t::aux::trace_events` is renamed to
`global_trace_events` to contrast with `local_hooks`.
* vm_core.h (rb_hook_list_t): add `rb_hook_list_t::running`
to represent how many Threads/Fibers are used this list.
If this field is 0, nobody using this hooks and we can
delete it.
This is why we can remove code from cont.c.
* vm_core.h (rb_vm_t): because of above change, we can eliminate
`rb_vm_t::trace_running` field.
Also renamed from `rb_vm_t::event_hooks` to `global_hooks`.
* vm_core.h, vm.c (ruby_vm_event_enabled_global_flags): renamed
from `ruby_vm_event_enabled_flags.
* vm_core.h, vm.c (ruby_vm_event_local_num): added to count
enabled targetting TracePoints.
* vm_core.h, vm_trace.c (rb_exec_event_hooks): accepts
hook list.
* vm_core.h (rb_vm_global_hooks): added for convinience.
* method.h (rb_method_bmethod_t): added to maintain Proc
and `rb_hook_list_t` for bmethod (defined by define_method).
* prelude.rb (TracePoint#enable): extracet a keyword parameter
(because it is easy than writing in C).
It calls `TracePoint#__enable` internal method written in C.
* vm_insnhelper.c (vm_trace): check also iseq->local_hooks.
* vm.c (invoke_bmethod): check def->body.bmethod.hooks.
* vm.c (hook_before_rewind): check iseq->local_hooks
and def->body.bmethod.hooks before rewind by exception.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66003 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
FIBER_USE_NATIVE is always defined as 0 or 1, use `#if` instead of
`#ifdef`.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65882 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
The only usage of rb_fiber_reset_root_local_storage() is from
ruby_vm_destruct(), where the object space is already terminated.
This `th->self` is not alive. Why not just use `th` itself.
See also: https://travis-ci.org/ruby/ruby/jobs/451294954
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65574 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Remove the remainder of ROOT_FIBER_CONTEXT use and unnecessary
differences between the root and non-root fiber. This makes
it easier to follow new root fiber at fork time.
Multiple sources of truth often leads to bugs, as in this case.
We can determinte root fiber by checking a fiber against the root_fiber
of its owner thread. The new `fiber_is_root_p' function
supports that.
Now, we can care only about free-ing/recycling/munmap-ing stacks
as appropriate.
[Bug #15050]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64706 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
We can check if the fiber we're interested in is the
th->root_fiber for the owner thread, so there is no need to use
ROOT_FIBER_CONTEXT.
Note: there is no guarantee th->ec points to
&th->root_fiber->cont.saved_ec, thus vm::thread_memsize may not
account for root fiber correctly (pre-existing bug).
[Bug #15050]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64705 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Am I missing something, here? Casting was totally unnecessary
and ugly...
[ruby-core:88929]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64704 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
ec->vm_stack is always allocated with malloc, so stack cache for
root fiber (thread stack) and non-root fibers can be shared as
long as the size is the same. The purpose of this change is to
reduce dependencies on ROOT_FIBER_CONTEXT.
[Feature #15095] [Bug #15050]
v2: vm.c: fix build with USE_THREAD_DATA_RECYCLE==0
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64703 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Otherwise, bootstraptest/test_fork.rb fails with -DVM_CHECK_MODE=2
[Bug #15041]
Fixes: r64589 "cont.c: set th->root_fiber to current fiber at fork"
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64593 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Otherwise, th->root_fiber can point to an invalid Fiber,
because Fibers do not live across fork. So consider
whatever Fiber is running the root fiber.
[ruby-core:88723] [Bug #15041]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64589 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
It is unused (we use rb_execution_context_t.ensure_list instead)
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64587 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Following ko1's lead in r59192, this gets rid of non-obvious
assignments which happen inside macros.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64489 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
On 32-bit x86, this reduces the struct from 836 to 832 bytes and
brings us down to 13 (64-byte) cachelines (from 14).
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64487 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
We see several occurrence of "diagnostic push/pop" so why not
make them macros. Tested on GCC8 / Clang 6.
Note that ruby.h is intentionally left untouched because we don't
want to introduce new public macros.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64118 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
timer-thread may set trap interrupt with rb_threadptr_check_signal
at any time independent of GVL. This means timer-thread may set
the trap interrupt flag on the previous execution context; causing
the flag to be unnoticed until a future ec switch (or lost
completely if the ec is done).
Note: I avoid relying on th->interrupt_lock here and use
atomics because we won't be able to rely on it for proposed lazy
timer-thread [Misc #14937].
This regression affects Ruby 2.5 as it was introduced by moving
interrupt_flag to `ec' which is an unstable pointer. Ruby <= 2.4
was unaffected because vm->main_thread->interrupt_flag never
changed.
[ruby-core:88119] [Bug #14939]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64062 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Samuel Williams
Nobuyoshi Nakada
git
Aaron Patterson
James Clarke
nobu
samuel
ko1
shyouhei
normal
kazu