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/factory.h"
8 #include "src/isolate.h"
9 #include "src/objects-inl.h"
10
11 namespace v8 {
12 namespace internal {
13 namespace interpreter {
14
HandlerTableBuilder(Isolate * isolate,Zone * zone)15 HandlerTableBuilder::HandlerTableBuilder(Isolate* isolate, Zone* zone)
16 : isolate_(isolate), entries_(zone) {}
17
ToHandlerTable()18 Handle<HandlerTable> HandlerTableBuilder::ToHandlerTable() {
19 int handler_table_size = static_cast<int>(entries_.size());
20 Handle<HandlerTable> table =
21 Handle<HandlerTable>::cast(isolate_->factory()->NewFixedArray(
22 HandlerTable::LengthForRange(handler_table_size), TENURED));
23 for (int i = 0; i < handler_table_size; ++i) {
24 Entry& entry = entries_[i];
25 HandlerTable::CatchPrediction pred =
26 entry.will_catch ? HandlerTable::CAUGHT : HandlerTable::UNCAUGHT;
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;
33 }
34
35
NewHandlerEntry()36 int HandlerTableBuilder::NewHandlerEntry() {
37 int handler_id = static_cast<int>(entries_.size());
38 Entry entry = {0, 0, 0, Register(), false};
39 entries_.push_back(entry);
40 return handler_id;
41 }
42
43
SetTryRegionStart(int handler_id,size_t offset)44 void HandlerTableBuilder::SetTryRegionStart(int handler_id, size_t offset) {
45 DCHECK(Smi::IsValid(offset)); // Encoding of handler table requires this.
46 entries_[handler_id].offset_start = offset;
47 }
48
49
SetTryRegionEnd(int handler_id,size_t offset)50 void HandlerTableBuilder::SetTryRegionEnd(int handler_id, size_t offset) {
51 DCHECK(Smi::IsValid(offset)); // Encoding of handler table requires this.
52 entries_[handler_id].offset_end = offset;
53 }
54
55
SetHandlerTarget(int handler_id,size_t offset)56 void HandlerTableBuilder::SetHandlerTarget(int handler_id, size_t offset) {
57 DCHECK(Smi::IsValid(offset)); // Encoding of handler table requires this.
58 entries_[handler_id].offset_target = offset;
59 }
60
61
SetPrediction(int handler_id,bool will_catch)62 void HandlerTableBuilder::SetPrediction(int handler_id, bool will_catch) {
63 entries_[handler_id].will_catch = will_catch;
64 }
65
66
SetContextRegister(int handler_id,Register reg)67 void HandlerTableBuilder::SetContextRegister(int handler_id, Register reg) {
68 entries_[handler_id].context = reg;
69 }
70
71 } // namespace interpreter
72 } // namespace internal
73 } // namespace v8
74