* vm_core.h: add VM_FRAME_MAGIC_RESCUE to recognize normal block or

rescue clause.
* vm.c (vm_exec): use VM_FRAME_MAGIC_RESCUE on at rescue/ensure.
* test/ruby/test_settracefunc.rb: should not invoke b_return at rescue
  clause.
  [Bug #9957]
* vm_dump.c (control_frame_dump): check VM_FRAME_MAGIC_RESCUE.
* vm_dump.c (vm_stack_dump_each): ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46463 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,18 @@
+Thu Jun 19 18:14:47 2014  Koichi Sasada  <ko1@atdot.net>
+
+	* vm_core.h: add VM_FRAME_MAGIC_RESCUE to recognize normal block or
+	  rescue clause.
+
+	* vm.c (vm_exec): use VM_FRAME_MAGIC_RESCUE on at rescue/ensure.
+
+	* test/ruby/test_settracefunc.rb: should not invoke b_return at rescue
+	  clause.
+	  [Bug #9957]
+
+	* vm_dump.c (control_frame_dump): check VM_FRAME_MAGIC_RESCUE.
+
+	* vm_dump.c (vm_stack_dump_each): ditto.
+
 Thu Jun 19 13:39:11 2014  Arne Brasseur  <arne@arnebrasseur.net>
 
 	* proc.c (rb_method_curry): Implement Method#curry, which delegates

test/ruby/test_settracefunc.rb

@@ -1202,4 +1202,40 @@ class TestSetTraceFunc < Test::Unit::TestCase
       raise if stack != [:p, :hash, :inspect]
     }, '[Bug #9940]'
   end
+
+  def method_test_rescue_should_not_cause_b_return
+    begin
+      raise
+    rescue
+      return
+    end
+  end
+
+  def method_test_ensure_should_not_cause_b_return
+    begin
+      raise
+    ensure
+      return
+    end
+  end
+
+  def test_rescue_and_ensure_should_not_cause_b_return
+    curr_thread = Thread.current
+    trace = TracePoint.new(:b_call, :b_return){
+      next if curr_thread != Thread.current
+      flunk("Should not reach here because there is no block.")
+    }
+
+    begin
+      trace.enable
+      method_test_rescue_should_not_cause_b_return
+      begin
+        method_test_ensure_should_not_cause_b_return
+      rescue
+        # ignore
+      end
+    ensure
+      trace.disable
+    end
+  end
 end

vm.c

@@ -1216,6 +1216,7 @@ vm_frametype_name(const rb_control_frame_t *cfp)
       case VM_FRAME_MAGIC_IFUNC:  return "ifunc";
       case VM_FRAME_MAGIC_EVAL:   return "eval";
       case VM_FRAME_MAGIC_LAMBDA: return "lambda";
+      case VM_FRAME_MAGIC_RESCUE: return "rescue";
       default:
 	rb_bug("unknown frame");
     }
@@ -1520,7 +1521,7 @@ vm_exec(rb_thread_t *th)
 
 	    /* push block frame */
 	    cfp->sp[0] = err;
-	    vm_push_frame(th, catch_iseq, VM_FRAME_MAGIC_BLOCK,
+	    vm_push_frame(th, catch_iseq, VM_FRAME_MAGIC_RESCUE,
 			  cfp->self, cfp->klass,
 			  VM_ENVVAL_PREV_EP_PTR(cfp->ep),
 			  catch_iseq->iseq_encoded,

vm_core.h

@@ -756,7 +756,8 @@ enum vm_special_object_type {
 #define VM_FRAME_MAGIC_IFUNC  0x81
 #define VM_FRAME_MAGIC_EVAL   0x91
 #define VM_FRAME_MAGIC_LAMBDA 0xa1
-#define VM_FRAME_MAGIC_MASK_BITS   8
+#define VM_FRAME_MAGIC_RESCUE 0xb1
+#define VM_FRAME_MAGIC_MASK_BITS 8
 #define VM_FRAME_MAGIC_MASK   (~(~0<<VM_FRAME_MAGIC_MASK_BITS))
 
 #define VM_FRAME_TYPE(cfp) ((cfp)->flag & VM_FRAME_MAGIC_MASK)

vm_dump.c

@@ -73,6 +73,9 @@ control_frame_dump(rb_thread_t *th, rb_control_frame_t *cfp)
       case VM_FRAME_MAGIC_EVAL:
 	magic = "EVAL";
 	break;
+      case VM_FRAME_MAGIC_RESCUE:
+	magic = "RESCUE";
+	break;
       case 0:
 	magic = "------";
 	break;
@@ -268,15 +271,17 @@ vm_stack_dump_each(rb_thread_t *th, rb_control_frame_t *cfp)
 
     /* stack trace header */
 
-    if (VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_METHOD ||
-	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_TOP ||
+    if (VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_METHOD||
+	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_TOP   ||
 	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_BLOCK ||
 	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_CLASS ||
-	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_PROC ||
-	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_LAMBDA ||
+	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_PROC  ||
+	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_LAMBDA||
 	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_CFUNC ||
 	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_IFUNC ||
-	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_EVAL) {
+	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_EVAL  ||
+	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_RESCUE)
+      {
 
 	VALUE *ptr = ep - local_size;