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

1 files changed, 7 insertions, 2 deletions

diff --git a/method.h b/method.h
index f6222ca4ae..bea630f4e2 100644
--- a/method.h
+++ b/method.h
@@ -147,6 +147,11 @@ typedef struct rb_method_refined_struct {
     const VALUE owner;
 } rb_method_refined_t;
 
+typedef struct rb_method_bmethod_struct {
+    const VALUE proc; /* should be marked */
+    struct rb_hook_list_struct *hooks;
+} rb_method_bmethod_t;
+
 enum method_optimized_type {
     OPTIMIZED_METHOD_TYPE_SEND,
     OPTIMIZED_METHOD_TYPE_CALL,
@@ -165,9 +170,9 @@ PACKED_STRUCT_UNALIGNED(struct rb_method_definition_struct {
 	rb_method_attr_t attr;
 	rb_method_alias_t alias;
 	rb_method_refined_t refined;
+        rb_method_bmethod_t bmethod;
 
-	const VALUE proc;                 /* should be marked */
-	enum method_optimized_type optimize_type;
+        enum method_optimized_type optimize_type;
     } body;
 
     ID original_id;