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// Copyright 2023 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/objects/bytecode-array.h"
#include <iomanip>
#include "src/codegen/handler-table.h"
#include "src/codegen/source-position-table.h"
#include "src/interpreter/bytecode-array-iterator.h"
#include "src/interpreter/bytecode-decoder.h"
#include "src/objects/bytecode-array-inl.h"
#include "src/utils/memcopy.h"
namespace v8 {
namespace internal {
void BytecodeArray::PrintJson(std::ostream& os) {
DisallowGarbageCollection no_gc;
Address base_address = GetFirstBytecodeAddress();
BytecodeArray handle_storage = *this;
Handle<BytecodeArray> handle(reinterpret_cast<Address*>(&handle_storage));
interpreter::BytecodeArrayIterator iterator(handle);
bool first_data = true;
os << "{\"data\": [";
while (!iterator.done()) {
if (!first_data) os << ", ";
Address current_address = base_address + iterator.current_offset();
first_data = false;
os << "{\"offset\":" << iterator.current_offset() << ", \"disassembly\":\"";
interpreter::BytecodeDecoder::Decode(
os, reinterpret_cast<uint8_t*>(current_address), false);
if (interpreter::Bytecodes::IsJump(iterator.current_bytecode())) {
os << " (" << iterator.GetJumpTargetOffset() << ")";
}
if (interpreter::Bytecodes::IsSwitch(iterator.current_bytecode())) {
os << " {";
bool first_entry = true;
for (interpreter::JumpTableTargetOffset entry :
iterator.GetJumpTableTargetOffsets()) {
if (!first_entry) os << ", ";
first_entry = false;
os << entry.target_offset;
}
os << "}";
}
os << "\"}";
iterator.Advance();
}
os << "]";
int constant_pool_lenght = constant_pool()->length();
if (constant_pool_lenght > 0) {
os << ", \"constantPool\": [";
for (int i = 0; i < constant_pool_lenght; i++) {
Object object = constant_pool()->get(i);
if (i > 0) os << ", ";
os << "\"" << object << "\"";
}
os << "]";
}
os << "}";
}
void BytecodeArray::Disassemble(std::ostream& os) {
DisallowGarbageCollection no_gc;
// Storage for backing the handle passed to the iterator. This handle won't be
// updated by the gc, but that's ok because we've disallowed GCs anyway.
BytecodeArray handle_storage = *this;
Handle<BytecodeArray> handle(reinterpret_cast<Address*>(&handle_storage));
Disassemble(handle, os);
}
// static
void BytecodeArray::Disassemble(Handle<BytecodeArray> handle,
std::ostream& os) {
DisallowGarbageCollection no_gc;
os << "Parameter count " << handle->parameter_count() << "\n";
os << "Register count " << handle->register_count() << "\n";
os << "Frame size " << handle->frame_size() << "\n";
Address base_address = handle->GetFirstBytecodeAddress();
SourcePositionTableIterator source_positions(handle->SourcePositionTable());
interpreter::BytecodeArrayIterator iterator(handle);
while (!iterator.done()) {
if (!source_positions.done() &&
iterator.current_offset() == source_positions.code_offset()) {
os << std::setw(5) << source_positions.source_position().ScriptOffset();
os << (source_positions.is_statement() ? " S> " : " E> ");
source_positions.Advance();
} else {
os << " ";
}
Address current_address = base_address + iterator.current_offset();
os << reinterpret_cast<const void*>(current_address) << " @ "
<< std::setw(4) << iterator.current_offset() << " : ";
interpreter::BytecodeDecoder::Decode(
os, reinterpret_cast<uint8_t*>(current_address));
if (interpreter::Bytecodes::IsJump(iterator.current_bytecode())) {
Address jump_target = base_address + iterator.GetJumpTargetOffset();
os << " (" << reinterpret_cast<void*>(jump_target) << " @ "
<< iterator.GetJumpTargetOffset() << ")";
}
if (interpreter::Bytecodes::IsSwitch(iterator.current_bytecode())) {
os << " {";
bool first_entry = true;
for (interpreter::JumpTableTargetOffset entry :
iterator.GetJumpTableTargetOffsets()) {
if (first_entry) {
first_entry = false;
} else {
os << ",";
}
os << " " << entry.case_value << ": @" << entry.target_offset;
}
os << " }";
}
os << std::endl;
iterator.Advance();
}
os << "Constant pool (size = " << handle->constant_pool()->length() << ")\n";
#ifdef OBJECT_PRINT
if (handle->constant_pool()->length() > 0) {
Print(handle->constant_pool(), os);
}
#endif
os << "Handler Table (size = " << handle->handler_table()->length() << ")\n";
#ifdef ENABLE_DISASSEMBLER
if (handle->handler_table()->length() > 0) {
HandlerTable table(*handle);
table.HandlerTableRangePrint(os);
}
#endif
ByteArray source_position_table = handle->SourcePositionTable();
os << "Source Position Table (size = " << source_position_table->length()
<< ")\n";
#ifdef OBJECT_PRINT
if (source_position_table->length() > 0) {
os << Brief(source_position_table) << std::endl;
}
#endif
}
void BytecodeArray::CopyBytecodesTo(Tagged<BytecodeArray> to) {
BytecodeArray from = *this;
DCHECK_EQ(from->length(), to->length());
CopyBytes(reinterpret_cast<uint8_t*>(to->GetFirstBytecodeAddress()),
reinterpret_cast<uint8_t*>(from->GetFirstBytecodeAddress()),
from->length());
}
} // namespace internal
} // namespace v8
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