Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 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 | |
| 15 | HandlerTableBuilder::HandlerTableBuilder(Isolate* isolate, Zone* zone) |
| 16 | : isolate_(isolate), entries_(zone) {} |
| 17 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 62 | void HandlerTableBuilder::SetPrediction(int handler_id, bool will_catch) { |
| 63 | entries_[handler_id].will_catch = will_catch; |
| 64 | } |
| 65 | |
| 66 | |
| 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 |