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// Copyright 2016 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/interpreter/handler-table-builder.h"
#include "src/execution/isolate.h"
#include "src/heap/factory.h"
#include "src/interpreter/bytecode-register.h"
#include "src/objects/objects-inl.h"
namespace v8 {
namespace internal {
namespace interpreter {
HandlerTableBuilder::HandlerTableBuilder(Zone* zone) : entries_(zone) {}
Handle<ByteArray> HandlerTableBuilder::ToHandlerTable(Isolate* isolate) {
int handler_table_size = static_cast<int>(entries_.size());
Handle<ByteArray> table_byte_array = isolate->factory()->NewByteArray(
HandlerTable::LengthForRange(handler_table_size), AllocationType::kOld);
HandlerTable table(*table_byte_array);
for (int i = 0; i < handler_table_size; ++i) {
Entry& entry = entries_[i];
HandlerTable::CatchPrediction pred = entry.catch_prediction_;
table.SetRangeStart(i, static_cast<int>(entry.offset_start));
table.SetRangeEnd(i, static_cast<int>(entry.offset_end));
table.SetRangeHandler(i, static_cast<int>(entry.offset_target), pred);
table.SetRangeData(i, entry.context.index());
}
return table_byte_array;
}
int HandlerTableBuilder::NewHandlerEntry() {
int handler_id = static_cast<int>(entries_.size());
Entry entry = {0, 0, 0, Register::invalid_value(), HandlerTable::UNCAUGHT};
entries_.push_back(entry);
return handler_id;
}
void HandlerTableBuilder::SetTryRegionStart(int handler_id, size_t offset) {
DCHECK(Smi::IsValid(offset)); // Encoding of handler table requires this.
entries_[handler_id].offset_start = offset;
}
void HandlerTableBuilder::SetTryRegionEnd(int handler_id, size_t offset) {
DCHECK(Smi::IsValid(offset)); // Encoding of handler table requires this.
entries_[handler_id].offset_end = offset;
}
void HandlerTableBuilder::SetHandlerTarget(int handler_id, size_t offset) {
DCHECK(Smi::IsValid(offset)); // Encoding of handler table requires this.
entries_[handler_id].offset_target = offset;
}
void HandlerTableBuilder::SetPrediction(
int handler_id, HandlerTable::CatchPrediction prediction) {
entries_[handler_id].catch_prediction_ = prediction;
}
void HandlerTableBuilder::SetContextRegister(int handler_id, Register reg) {
entries_[handler_id].context = reg;
}
} // namespace interpreter
} // namespace internal
} // namespace v8