shorten warning

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38629 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  pop a frame before JUMP_TAG() if exception occurred.
  This change fix bug of Ruby 1.9.
  [ruby-core:51128] [ruby-trunk - Bug #7624]
* vm_core.h (EXEC_EVENT_HOOK_AND_POP_FRAME): add to use
  `rb_threadptr_exec_event_hooks_and_pop_frame()'.
* vm.c (vm_exec): use EXEC_EVENT_HOOK_AND_POP_FRAME() while
  exception handling. While exception hadnling, if an exception
  is raised in hooks, need to pop current frame and raise this
  raised exception by hook.
* test/ruby/test_settracefunc.rb: add a test.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38601 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  CHECK_STACK_OVERFLOW() to vm_core.h and rename to
  CHECK_VM_STACK_OVERFLOW().
  This change is only move and rename.
* tool/instruction.rb: catch up above changes.
* vm.c, vm_insnhelper.c: ditto.
* vm_insnhelper.c (vm_stackoverflow): add a function to unify
  raising vm stackoverflow exception.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38594 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  VM stack size (128 KB or  256 KB -> 512 KB or 1024 KB).
  This re-sizing corrects smaller value introduced at r38478.
  Newer value is same VM stack size of Ruby 1.9.
  [ruby-dev:46797] [ruby-trunk - Bug #7603]



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38592 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  from Thread.async_interrupt_timing to Thread.handle_interrupt,
  from Thread.async_interrupted? to Thread.pending_interrupt?.
  Also rename option from `defer' to `never'.
  [ruby-core:51074] [ruby-trunk - Feature #6762]
* vm_core.c, thread.c: rename functions and data structure
  `async_errinfo' to `pending_interrupt'.
* thread.c: add global variables sym_immediate, sym_on_blocking and
  sym_never.
* cont.c, process.c, vm.c, signal.c: ditto.
* lib/sync.rb, lib/thread.rb: catch up this renaming.
* test/ruby/test_thread.rb: ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38577 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* vm_core.h: catch up above changes.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38526 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  Move `trace_arg' from rb_tp_t::trace_arg to rb_thread_t::trace_arg.
  `trace_arg' may changed by multiple threads.
  rb_thread_t::trace_arg can represent rb_thread_t::trace_running
  (null or non-null) and rb_thread_t::trace_running is removed.
  After that, `rb_tp_t' is not needed to check tracing or not
  (A running thread knows tracing or not). This is why I remove
  tp_attr_check_active() and make new function get_trace_arg().
  And this modification disable to work the following code:
  TracePoint.trace{|tp|
  Thread.new{p tp.event} # access `tp' from other threads.
  }
  I believe nobody mix threads at trace procedure.
  This is current limitation.
* cont.c (fiber_switch, rb_cont_call): use rb_thread_t::trace_arg
  instead of rb_thread_t::trace_running.
* test/ruby/test_settracefunc.rb: add a multi-threading test.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38524 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  compile.c (iseq_compile_each), insns.def (defineclass): change the
  meaning of the third operand of defineclass as follows:
    lower 3bits: the type of the defineclass
                   0 = class, 1 = singleton class, 2 = module
    4th bit: a flag represents whether the defineclass is scoped
               0 = not scoped (e.g., class Foo)
	       1 = scoped (e.g., class Bar::Baz)
    5th bit: a flag represents whether the superclass is specified
               0 = not specified (e.g., class Foo)
               1 = specified (e.g., class Bar < Foo)
  If the superclass is specified and is not a class, a TypeError
  should be raised.  [ruby-dev:46747] [Bug #7572]

* test/ruby/test_class.rb: related test.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38495 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  Specified by the following environment variaables:
  - RUBY_THREAD_VM_STACK_SIZE: vm stack size used at thread creation.
  default: 128KB (32bit CPU) or 256KB (64bit CPU).
  - RUBY_THREAD_MACHINE_STACK_SIZE: machine stack size used at thread
  creation. default: 512KB or 1024KB.
  - RUBY_FIBER_VM_STACK_SIZE: vm stack size used at fiber creation.
  default: 64KB or 128KB.
  - RUBY_FIBER_MACHINE_STACK_SIZE: machine stack size used at fiber
  creation. default: 256KB or 256KB.
  This values are specified at launched timing. You can not change
  these values at running time.
  Environ variables are only *hints* because:
  - They are aligned to 4KB.
  - They have minimum values (depend on OSs).
  - Machine stack settings are ignored by some OSs.
  Default values especially fiber stack sizes are increased.
  This change affect Fiber's behavior:
  (1) You can run more complex program on a Fiber.
  (2) You can not make many (thousands) Fibers because of
  lack of address space (on 32bit CPU).
  If (2) bothers you,
  (a) Use 64bit CPU with big memory, or
  (b) Specify RUBY_FIBER_(VM|MACHINE)_STACK_SIZE correctly.
  You need to choose correct stack size carefully. These values
  are completely rely on systems (OS/compiler and so on).
* vm_core.h (rb_vm_t::default_params): add to record above settings.
* vm.c (RubyVM::DEFAULT_PARAMS): add new constant to see
  above setting.
* thread_pthread.c: support RUBY_THREAD_MACHINE_STACK_SIZE.
* cont.c: support RUBY_FIBER_(VM|MACHINE)_STACK_SIZE.
* test/ruby/test_fiber.rb: add tests for above.
* test/ruby/test_thread.rb: ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38478 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  sigsegv handler. enlarge value when x86 or x86_64 on Linux.
  Linux has very small MINSIGSTKSZ size (2048 bytes) and
  our sigsegv routine need 5KiB at least. [Bug #7141]
* internal.h: add declaration of rb_sigaltstack_size().
* vm_core.h: remove ALT_STACK_SIZE definition.

* signal.c (rb_register_sigaltstack): replace ALT_STACK_SIZE with
  rb_sigaltstack_size();
* gc.c (Init_heap): ditto.
* vm.c (th_init): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38409 b2dd03c8-39d4-4d8f-98ff-823fe69b080e