Correctly find shared function info for debugging when compiling eagerly.

src/debug.cc

 // 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.
 
 #include "src/v8.h"
 
 #include "src/api.h"
 #include "src/arguments.h"
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
@@ skipping 2103 matching lines @@
   // compiled lazily without a context to not be compiled at all. Compilation
   // will be triggered at points where we do not need a context.
   bool done = false;
   // The current candidate for the source position:
   int target_start_position = RelocInfo::kNoPosition;
   Handle<JSFunction> target_function;
   Handle<SharedFunctionInfo> target;
   Heap* heap = isolate_->heap();
   while (!done) {
     { // Extra scope for iterator.
-      HeapIterator iterator(heap);
+      // If lazy compilation is off, we won't have duplicate shared function
+      // infos that need to be filtered.
+      HeapIterator iterator(heap, FLAG_lazy ? HeapIterator::kNoFiltering
+                                            : HeapIterator::kFilterUnreachable);
       for (HeapObject* obj = iterator.next();
            obj != NULL; obj = iterator.next()) {
         bool found_next_candidate = false;
         Handle<JSFunction> function;
         Handle<SharedFunctionInfo> shared;
         if (obj->IsJSFunction()) {
           function = Handle<JSFunction>(JSFunction::cast(obj));
           shared = Handle<SharedFunctionInfo>(function->shared());
           DCHECK(shared->allows_lazy_compilation() || shared->is_compiled());
           found_next_candidate = true;
@@ skipping 1307 matching lines @@
   logger_->DebugEvent("Put", message.text());
 }
 
 
 void LockingCommandMessageQueue::Clear() {
   base::LockGuard<base::Mutex> lock_guard(&mutex_);
   queue_.Clear();
 }
 
 } }  // namespace v8::internal