1// Copyright 2016 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#include "src/interpreter/handler-table-builder.h"
6
7#include "src/execution/isolate.h"
8#include "src/heap/factory.h"
9#include "src/interpreter/bytecode-register.h"
10#include "src/objects/objects-inl.h"
11
12namespace v8 {
13namespace internal {
14namespace interpreter {
15
16HandlerTableBuilder::HandlerTableBuilder(Zone* zone) : entries_(zone) {}
17
18template <typename IsolateT>
19Handle<ByteArray> HandlerTableBuilder::ToHandlerTable(IsolateT* isolate) {
20  int handler_table_size = static_cast<int>(entries_.size());
21  Handle<ByteArray> table_byte_array = isolate->factory()->NewByteArray(
22      HandlerTable::LengthForRange(handler_table_size), AllocationType::kOld);
23  HandlerTable table(*table_byte_array);
24  for (int i = 0; i < handler_table_size; ++i) {
25    Entry& entry = entries_[i];
26    HandlerTable::CatchPrediction pred = entry.catch_prediction_;
27    table.SetRangeStart(i, static_cast<int>(entry.offset_start));
28    table.SetRangeEnd(i, static_cast<int>(entry.offset_end));
29    table.SetRangeHandler(i, static_cast<int>(entry.offset_target), pred);
30    table.SetRangeData(i, entry.context.index());
31  }
32  return table_byte_array;
33}
34
35template Handle<ByteArray> HandlerTableBuilder::ToHandlerTable(
36    Isolate* isolate);
37template Handle<ByteArray> HandlerTableBuilder::ToHandlerTable(
38    LocalIsolate* isolate);
39
40int HandlerTableBuilder::NewHandlerEntry() {
41  int handler_id = static_cast<int>(entries_.size());
42  Entry entry = {0, 0, 0, Register::invalid_value(), HandlerTable::UNCAUGHT};
43  entries_.push_back(entry);
44  return handler_id;
45}
46
47
48void HandlerTableBuilder::SetTryRegionStart(int handler_id, size_t offset) {
49  DCHECK(Smi::IsValid(offset));  // Encoding of handler table requires this.
50  entries_[handler_id].offset_start = offset;
51}
52
53
54void HandlerTableBuilder::SetTryRegionEnd(int handler_id, size_t offset) {
55  DCHECK(Smi::IsValid(offset));  // Encoding of handler table requires this.
56  entries_[handler_id].offset_end = offset;
57}
58
59
60void HandlerTableBuilder::SetHandlerTarget(int handler_id, size_t offset) {
61  DCHECK(Smi::IsValid(offset));  // Encoding of handler table requires this.
62  entries_[handler_id].offset_target = offset;
63}
64
65void HandlerTableBuilder::SetPrediction(
66    int handler_id, HandlerTable::CatchPrediction prediction) {
67  entries_[handler_id].catch_prediction_ = prediction;
68}
69
70
71void HandlerTableBuilder::SetContextRegister(int handler_id, Register reg) {
72  entries_[handler_id].context = reg;
73}
74
75}  // namespace interpreter
76}  // namespace internal
77}  // namespace v8
78