1 // Copyright 2015 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #ifndef V8_TEST_FEEDBACK_VECTOR_H_
6 #define V8_TEST_FEEDBACK_VECTOR_H_
7
8 #include "src/objects/feedback-vector.h"
9 #include "src/objects/objects.h"
10 #include "src/objects/shared-function-info.h"
11
12 namespace v8 {
13 namespace internal {
14
15 // Helper class that allows to write tests in a slot size independent manner.
16 // Use helper.slot(X) to get X'th slot identifier.
17 class FeedbackVectorHelper {
18 public:
FeedbackVectorHelper(Handle<FeedbackVector> vector)19 explicit FeedbackVectorHelper(Handle<FeedbackVector> vector)
20 : vector_(vector) {
21 int slot_count = vector->length();
22 slots_.reserve(slot_count);
23 FeedbackMetadataIterator iter(vector->metadata());
24 while (iter.HasNext()) {
25 FeedbackSlot slot = iter.Next();
26 slots_.push_back(slot);
27 }
28 }
29
vector()30 Handle<FeedbackVector> vector() { return vector_; }
31
32 // Returns slot identifier by numerical index.
slot(int index)33 FeedbackSlot slot(int index) const { return slots_[index]; }
34
35 // Returns the number of slots in the feedback vector.
slot_count()36 int slot_count() const { return static_cast<int>(slots_.size()); }
37
38 private:
39 Handle<FeedbackVector> vector_;
40 std::vector<FeedbackSlot> slots_;
41 };
42
43 template <typename Spec>
NewFeedbackVector(Isolate * isolate,Spec * spec)44 Handle<FeedbackVector> NewFeedbackVector(Isolate* isolate, Spec* spec) {
45 Handle<FeedbackMetadata> metadata = FeedbackMetadata::New(isolate, spec);
46 Handle<SharedFunctionInfo> shared =
47 isolate->factory()->NewSharedFunctionInfoForBuiltin(
48 isolate->factory()->empty_string(), Builtin::kIllegal);
49 // Set the raw feedback metadata to circumvent checks that we are not
50 // overwriting existing metadata.
51 shared->set_raw_outer_scope_info_or_feedback_metadata(*metadata);
52 Handle<ClosureFeedbackCellArray> closure_feedback_cell_array =
53 ClosureFeedbackCellArray::New(isolate, shared);
54 IsCompiledScope is_compiled_scope(shared->is_compiled_scope(isolate));
55 return FeedbackVector::New(isolate, shared, closure_feedback_cell_array,
56 &is_compiled_scope);
57 }
58
59 template <typename Spec>
NewFeedbackMetadata(Isolate * isolate,Spec * spec)60 Handle<FeedbackMetadata> NewFeedbackMetadata(Isolate* isolate, Spec* spec) {
61 return FeedbackMetadata::New(isolate, spec);
62 }
63
64 } // namespace internal
65 } // namespace v8
66
67 #endif
68