[runtime] split up loops with HandleScopes

src/isolate.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_ISOLATE_H_
 #define V8_ISOLATE_H_
 
 #include <queue>
 #include <set>
 
@@ skipping 160 matching lines @@
   C(Context, context)                                   \
   C(PendingException, pending_exception)                \
   C(PendingHandlerContext, pending_handler_context)     \
   C(PendingHandlerCode, pending_handler_code)           \
   C(PendingHandlerOffset, pending_handler_offset)       \
   C(PendingHandlerFP, pending_handler_fp)               \
   C(PendingHandlerSP, pending_handler_sp)               \
   C(ExternalCaughtException, external_caught_exception) \
   C(JSEntrySP, js_entry_sp)
 
+#define FOR_WITH_HANDLE_SCOPE(isolate, loop_var_type, init, loop_var,      \
+                              limit_check, increment, body)                \
+  do {                                                                     \
+    loop_var_type init;                                                    \
+    loop_var_type for_with_handle_limit = loop_var;                        \
+    Isolate* for_with_handle_isolate = isolate;                            \
+    while (limit_check) {                                                  \
+      for_with_handle_limit += 1024;                                       \
+      HandleScope loop_scope(for_with_handle_isolate);                     \
+      for (; limit_check && loop_var < for_with_handle_limit; increment) { \
+        body                                                               \
+      }                                                                    \
+    }                                                                      \
+  } while (false)
 
 // Platform-independent, reliable thread identifier.
 class ThreadId {
  public:
   // Creates an invalid ThreadId.
   ThreadId() { base::NoBarrier_Store(&id_, kInvalidId); }
 
   ThreadId& operator=(const ThreadId& other) {
     base::NoBarrier_Store(&id_, base::NoBarrier_Load(&other.id_));
     return *this;
@@ skipping 1375 matching lines @@
 
   EmbeddedVector<char, 128> filename_;
   FILE* file_;
   int scope_depth_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_ISOLATE_H_