Support targetting TracePoint [Feature #15289]

* 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

2 files changed, 2 insertions, 2 deletions

diff --git a/tool/ruby_vm/views/_mjit_compile_insn.erb b/tool/ruby_vm/views/_mjit_compile_insn.erb
index 203c60476c..a52c928abf 100644
--- a/tool/ruby_vm/views/_mjit_compile_insn.erb
+++ b/tool/ruby_vm/views/_mjit_compile_insn.erb
@@ -61,7 +61,7 @@
 %
 % # JIT: We should evaluate ISeq modified for TracePoint if it's enabled. Note: This is slow.
 % unless insn.always_leaf?
-        fprintf(f, "    if (UNLIKELY(ruby_vm_event_enabled_flags & ISEQ_TRACE_EVENTS)) {\n");
+        fprintf(f, "    if (UNLIKELY(ruby_vm_event_enabled_global_flags & ISEQ_TRACE_EVENTS)) {\n");
         fprintf(f, "        reg_cfp->sp = (VALUE *)reg_cfp->bp + %d;\n", b->stack_size + (int)<%= insn.call_attribute('sp_inc') %> + 1);
         if (!pc_moved_p) {
             fprintf(f, "        reg_cfp->pc = original_body_iseq + %d;\n", next_pos);
diff --git a/tool/ruby_vm/views/_mjit_compile_send.erb b/tool/ruby_vm/views/_mjit_compile_send.erb
index 4adbb1f153..40d803af7a 100644
--- a/tool/ruby_vm/views/_mjit_compile_send.erb
+++ b/tool/ruby_vm/views/_mjit_compile_send.erb
@@ -76,7 +76,7 @@
             fprintf(f, "    }\n");
 
 % # JIT: We should evaluate ISeq modified for TracePoint if it's enabled. Note: This is slow.
-            fprintf(f, "    if (UNLIKELY(ruby_vm_event_enabled_flags & ISEQ_TRACE_EVENTS)) {\n");
+            fprintf(f, "    if (UNLIKELY(ruby_vm_event_enabled_global_flags & ISEQ_TRACE_EVENTS)) {\n");
             fprintf(f, "        reg_cfp->sp = (VALUE *)reg_cfp->bp + %d;\n", b->stack_size + (int)<%= insn.call_attribute('sp_inc') %> + 1);
             if (!pc_moved_p) {
                 fprintf(f, "        reg_cfp->pc = original_body_iseq + %d;\n", next_pos);