Introduce disposable call-cache.

This patch contains several ideas:

(1) Disposable inline method cache (IMC) for race-free inline method cache
    * Making call-cache (CC) as a RVALUE (GC target object) and allocate new
      CC on cache miss.
    * This technique allows race-free access from parallel processing
      elements like RCU.
(2) Introduce per-Class method cache (pCMC)
    * Instead of fixed-size global method cache (GMC), pCMC allows flexible
      cache size.
    * Caching CCs reduces CC allocation and allow sharing CC's fast-path
      between same call-info (CI) call-sites.
(3) Invalidate an inline method cache by invalidating corresponding method
    entries (MEs)
    * Instead of using class serials, we set "invalidated" flag for method
      entry itself to represent cache invalidation.
    * Compare with using class serials, the impact of method modification
      (add/overwrite/delete) is small.
    * Updating class serials invalidate all method caches of the class and
      sub-classes.
    * Proposed approach only invalidate the method cache of only one ME.

See [Feature #16614] for more details.

1 files changed, 2 insertions, 2 deletions

diff --git a/vm_dump.c b/vm_dump.c
index 64a210543c..5bcbac1746 100644
--- a/vm_dump.c
+++ b/vm_dump.c
@@ -111,7 +111,7 @@ control_frame_dump(const rb_execution_context_t *ec, const rb_control_frame_t *c
     }
 
     if (cfp->iseq != 0) {
-#define RUBY_VM_IFUNC_P(ptr) imemo_type_p((VALUE)ptr, imemo_ifunc)
+#define RUBY_VM_IFUNC_P(ptr) IMEMO_TYPE_P(ptr, imemo_ifunc)
 	if (RUBY_VM_IFUNC_P(cfp->iseq)) {
 	    iseq_name = "<ifunc>";
 	}
@@ -167,7 +167,7 @@ control_frame_dump(const rb_execution_context_t *ec, const rb_control_frame_t *c
         char buff[0x100];
 
         if (me) {
-            if (imemo_type_p((VALUE)me, imemo_ment)) {
+            if (IMEMO_TYPE_P(me, imemo_ment)) {
                 fprintf(stderr, "  me:\n");
                 fprintf(stderr, "    called_id: %s, type: %s\n", rb_id2name(me->called_id), rb_method_type_name(me->def->type));
                 fprintf(stderr, "    owner class: %s\n", rb_raw_obj_info(buff, 0x100, me->owner));