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/*
* Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>
* Copyright (C) 2017-2019 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "BytecodeDumper.h"
#include "BytecodeGenerator.h"
#include "BytecodeGraph.h"
#include "BytecodeStructs.h"
#include "CodeBlock.h"
#include "JSCJSValueInlines.h"
#include "UnlinkedCodeBlockGenerator.h"
#include "UnlinkedMetadataTableInlines.h"
#include "WasmFunctionCodeBlockGenerator.h"
#include "WasmGeneratorTraits.h"
#include "WasmModuleInformation.h"
#include "WasmTypeDefinitionInlines.h"
namespace JSC {
template<typename InstructionStreamType>
void BytecodeDumperBase<InstructionStreamType>::printLocationAndOp(typename InstructionStreamType::Offset location, const char* op)
{
m_currentLocation = location;
m_out.printf("[%4u] %-18s ", location, op);
}
template<typename InstructionStreamType>
void BytecodeDumperBase<InstructionStreamType>::dumpValue(VirtualRegister reg)
{
m_out.printf("%s", registerName(reg).data());
}
template<typename InstructionStreamType>
template<typename Traits>
void BytecodeDumperBase<InstructionStreamType>::dumpValue(GenericBoundLabel<Traits> label)
{
int class="pl-c1">target();
if (!target)
class="pl-c1">outOfLineJumpOffset(m_currentLocation);
auto targetOffset = target + m_currentLocation;
m_out.print(target, "(->", targetOffset, ")");
}
template void BytecodeDumperBase<JSInstructionStream>::dumpValue(GenericBoundLabel<JSGeneratorTraits>);
#if ENABLE(WEBASSEMBLY)
template void BytecodeDumperBase<WasmInstructionStream>::dumpValue(GenericBoundLabel<Wasm::GeneratorTraits>);
#endif // ENABLE(WEBASSEMBLY)
template<class Block>
CString BytecodeDumper<Block>::registerName(VirtualRegister r) const
{
if (r.isConstant())
return constantName(r);
return toCString(r);
}
template <class Block>
int BytecodeDumper<Block>::outOfLineJumpOffset(JSInstructionStream::Offset offset) const
{
return m_block->outOfLineJumpOffset(offset);
}
template<class Block>
CString BytecodeDumper<Block>::constantName(VirtualRegister reg) const
{
auto value = block()->getConstant(reg);
return toCString(value, "(", reg, ")");
}
template<class Block>
void BytecodeDumper<Block>::dumpBytecode(const JSInstructionStream::Ref& it, const ICStatusMap&)
{
::JSC::dumpBytecode(this, it.offset(), it.ptr());
this->m_out.print("\n");
}
template<class Block>
void BytecodeDumper<Block>::dumpBytecode(Block* block, PrintStream& out, const JSInstructionStream::Ref& it, const ICStatusMap& statusMap)
{
BytecodeDumper dumper(block, out);
dumper.dumpBytecode(it, statusMap);
}
template<class Block>
VM& CodeBlockBytecodeDumper<Block>::vm() const
{
return this->block()->vm();
}
template<class Block>
const Identifier& CodeBlockBytecodeDumper<Block>::identifier(int index) const
{
return this->block()->identifier(index);
}
template<class Block>
void CodeBlockBytecodeDumper<Block>::dumpIdentifiers()
{
if (size_t count = this->block()->numberOfIdentifiers()) {
this->m_out.printf("\nIdentifiers:\n");
size_t i = 0;
do {
this->m_out.print(" id", static_cast<unsigned>(i), " = ", identifier(i), "\n");
++i;
} while (i != count);
}
}
template<class Block>
void CodeBlockBytecodeDumper<Block>::dumpConstants()
{
if (!this->block()->constantRegisters().isEmpty()) {
this->m_out.printf("\nConstants:\n");
size_t i = 0;
for (const auto& constant : this->block()->constantRegisters()) {
const char* sourceCodeRepresentationDescription = nullptr;
switch (this->block()->constantSourceCodeRepresentation(i)) {
case SourceCodeRepresentation::Double:
sourceCodeRepresentationDescription = ": in source as double";
break;
case SourceCodeRepresentation::Integer:
sourceCodeRepresentationDescription = ": in source as integer";
break;
case SourceCodeRepresentation::Other:
sourceCodeRepresentationDescription = "";
break;
case SourceCodeRepresentation::LinkTimeConstant:
sourceCodeRepresentationDescription = ": in source as link-time-constant";
break;
}
this->m_out.printf(" k%u = %s%s\n", static_cast<unsigned>(i), toCString(constant.get()).data(), sourceCodeRepresentationDescription);
++i;
}
}
}
template<class Block>
void CodeBlockBytecodeDumper<Block>::dumpExceptionHandlers()
{
if (unsigned count = this->block()->numberOfExceptionHandlers()) {
this->m_out.printf("\nException Handlers:\n");
unsigned i = 0;
do {
const auto& handler = this->block()->exceptionHandler(i);
this->m_out.printf("\t %d: { start: [%4d] end: [%4d] target: [%4d] } %s\n", i + 1, handler.start, handler.end, handler.target, handler.typeName());
++i;
} while (i < count);
}
}
template<class Block>
void CodeBlockBytecodeDumper<Block>::dumpSwitchJumpTables()
{
if (unsigned count = this->block()->numberOfUnlinkedSwitchJumpTables()) {
this->m_out.printf("Switch Jump Tables:\n");
unsigned i = 0;
do {
this->m_out.printf(" %1d = {\n", i);
const auto& switchJumpTable = this->block()->unlinkedSwitchJumpTable(i);
int entry = 0;
auto end = switchJumpTable.m_branchOffsets.end();
for (auto iter = switchJumpTable.m_branchOffsets.begin(); iter != end; ++iter, ++entry) {
if (!*iter)
continue;
this->m_out.printf("\t\t%4d => %04d\n", entry + switchJumpTable.m_min, *iter);
}
this->m_out.printf(" }\n");
++i;
} while (i < count);
}
}
template<class Block>
void CodeBlockBytecodeDumper<Block>::dumpStringSwitchJumpTables()
{
if (unsigned count = this->block()->numberOfUnlinkedStringSwitchJumpTables()) {
this->m_out.printf("\nString Switch Jump Tables:\n");
unsigned i = 0;
do {
this->m_out.printf(" %1d = {\n", i);
for (const auto& entry : this->block()->unlinkedStringSwitchJumpTable(i).m_offsetTable)
this->m_out.printf("\t\t\"%s\" => %04d\n", entry.key->utf8().data(), entry.value.m_branchOffset);
this->m_out.printf(" }\n");
++i;
} while (i < count);
}
}
template <typename Block>
static void dumpHeader(Block* block, const JSInstructionStream& instructions, PrintStream& out)
{
size_t instructionCount = 0;
size_t wide16InstructionCount = 0;
size_t wide32InstructionCount = 0;
size_t instructionWithMetadataCount = 0;
for (const auto& instruction : instructions) {
if (instruction->isWide16())
++wide16InstructionCount;
else if (instruction->isWide32())
++wide32InstructionCount;
if (instruction->hasMetadata())
++instructionWithMetadataCount;
++instructionCount;
}
out.print(*block);
out.printf(
": %lu instructions (%lu 16-bit instructions, %lu 32-bit instructions, %lu instructions with metadata); %lu bytes (%lu metadata bytes); %d parameter(s); %d callee register(s); %d variable(s)",
static_cast<unsigned long>(instructionCount),
static_cast<unsigned long>(wide16InstructionCount),
static_cast<unsigned long>(wide32InstructionCount),
static_cast<unsigned long>(instructionWithMetadataCount),
static_cast<unsigned long>(instructions.sizeInBytes() + block->metadataSizeInBytes()),
static_cast<unsigned long>(block->metadataSizeInBytes()),
block->numParameters(), block->numCalleeLocals(), block->numVars());
out.print("; scope at ", block->scopeRegister());
out.printf("\n");
}
template <typename Dumper>
static void dumpFooter(Dumper& dumper)
{
dumper.dumpIdentifiers();
dumper.dumpConstants();
dumper.dumpExceptionHandlers();
dumper.dumpSwitchJumpTables();
dumper.dumpStringSwitchJumpTables();
}
template<class Block>
void CodeBlockBytecodeDumper<Block>::dumpBlock(Block* block, const JSInstructionStream& instructions, PrintStream& out, const ICStatusMap& statusMap)
{
dumpHeader(block, instructions, out);
CodeBlockBytecodeDumper<Block> dumper(block, out);
for (const auto& it : instructions)
dumper.dumpBytecode(it, statusMap);
dumpFooter(dumper);
out.printf("\n");
}
template<class Block>
void CodeBlockBytecodeDumper<Block>::dumpGraph(Block* block, const JSInstructionStream& instructions, BytecodeGraph& graph, PrintStream& out, const ICStatusMap& icStatusMap)
{
dumpHeader(block, instructions, out);
CodeBlockBytecodeDumper<Block> dumper(block, out);
out.printf("\n");
Vector<Vector<unsigned>> predecessors;
predecessors.resize(graph.size());
for (auto& block : graph) {
if (block.isEntryBlock() || block.isExitBlock())
continue;
for (auto successorIndex : block.successors()) {
if (!predecessors[successorIndex].contains(block.index()))
predecessors[successorIndex].append(block.index());
}
}
for (auto& block : graph) {
if (block.isEntryBlock() || block.isExitBlock())
continue;
out.print("bb#", block.index(), "\n");
out.print("Predecessors: [");
for (unsigned predecessor : predecessors[block.index()]) {
if (!graph[predecessor].isEntryBlock())
out.print(" #", predecessor);
}
out.print(" ]\n");
for (unsigned i = 0; i < block.totalLength(); ) {
auto& currentInstruction = instructions.at(i + block.leaderOffset());
dumper.dumpBytecode(currentInstruction, icStatusMap);
i += currentInstruction.ptr()->size();
}
out.print("Successors: [");
for (unsigned successor : block.successors()) {
if (!graph[successor].isExitBlock())
out.print(" #", successor);
}
out.print(" ]\n\n");
}
dumpFooter(dumper);
out.printf("\n");
}
template class BytecodeDumperBase<JSInstructionStream>;
template class BytecodeDumper<CodeBlock>;
template class CodeBlockBytecodeDumper<UnlinkedCodeBlockGenerator>;
template class CodeBlockBytecodeDumper<CodeBlock>;
#if ENABLE(WEBASSEMBLY)
template class BytecodeDumperBase<WasmInstructionStream>;
namespace Wasm {
void BytecodeDumper::dumpBlock(FunctionCodeBlockGenerator* block, const ModuleInformation& moduleInformation, PrintStream& out)
{
size_t instructionCount = 0;
size_t wide16InstructionCount = 0;
size_t wide32InstructionCount = 0;
for (auto it = block->instructions().begin(); it != block->instructions().end(); it += it->size()) {
if (it->isWide16())
++wide16InstructionCount;
else if (it->isWide32())
++wide32InstructionCount;
++instructionCount;
}
size_t functionIndexSpace = moduleInformation.importFunctionCount() + block->functionIndex();
out.print(makeString(IndexOrName(functionIndexSpace, moduleInformation.nameSection->get(functionIndexSpace))));
const auto& function = moduleInformation.functions[block->functionIndex()];
TypeIndex typeIndex = moduleInformation.internalFunctionTypeIndices[block->functionIndex()];
const auto& typeDefinition = TypeInformation::get(typeIndex);
out.print(" : ", typeDefinition, "\n");
out.print("wasm size: ", function.data.size(), " bytes\n");
out.printf(
"bytecode: %lu instructions (%lu 16-bit instructions, %lu 32-bit instructions); %lu bytes; %d parameter(s); %d local(s); %d callee register(s)\n",
static_cast<unsigned long>(instructionCount),
static_cast<unsigned long>(wide16InstructionCount),
static_cast<unsigned long>(wide32InstructionCount),
static_cast<unsigned long>(block->instructions().sizeInBytes()),
block->numArguments(),
block->numVars(),
block->numCalleeLocals());
BytecodeDumper dumper(block, out);
for (auto it = block->instructions().begin(); it != block->instructions().end(); it += it->size()) {
dumpWasm(&dumper, it.offset(), it.ptr());
out.print("\n");
}
dumper.dumpConstants();
out.printf("\n");
}
void BytecodeDumper::dumpConstants()
{
FunctionCodeBlockGenerator* block = this->block();
if (!block->constants().isEmpty()) {
this->m_out.printf("\nConstants:\n");
unsigned i = 0;
for (const auto& constant : block->constants()) {
Type type = block->constantTypes()[i];
this->m_out.print(" const", i, " : ", type.kind, " = ", formatConstant(type, constant), "\n");
++i;
}
}
}
CString BytecodeDumper::constantName(VirtualRegister index) const
{
FunctionCodeBlockGenerator* block = this->block();
auto value = formatConstant(block->getConstantType(index), block->getConstant(index));
return toCString(value, "(", VirtualRegister(index), ")");
}
CString BytecodeDumper::formatConstant(Type type, uint64_t constant) const
{
switch (type.kind) {
case TypeKind::I32:
return toCString(static_cast<int32_t>(constant));
case TypeKind::I64:
return toCString(constant);
case TypeKind::F32:
return toCString(bitwise_cast<float>(static_cast<int32_t>(constant)));
break;
case TypeKind::F64:
return toCString(bitwise_cast<double>(constant));
break;
default: {
if (isFuncref(type) || isExternref(type)) {
if (JSValue::decode(constant) == jsNull())
return "null";
return toCString(RawPointer(bitwise_cast<void*>(constant)));
}
RELEASE_ASSERT_NOT_REACHED();
return "";
}
}
}
CString BytecodeDumper::registerName(VirtualRegister r) const
{
if (r.isConstant())
return constantName(r);
return toCString(r);
}
int BytecodeDumper::outOfLineJumpOffset(WasmInstructionStream::Offset offset) const
{
return m_block->outOfLineJumpOffset(offset);
}
} // namespace Wasm
#endif // ENABLE(WEBASSEMBLY)
}