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Copy pathBytecodeDumper.cpp
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337 lines (295 loc) · 11.9 KB
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/*
* Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>
* Copyright (C) 2017-2022 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 "WasmModuleInformation.h"
#include "WasmTypeDefinitionInlines.h"
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
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.print(registerName(reg));
}
template<typename InstructionStreamType>
void BytecodeDumperBase<InstructionStreamType>::dumpValue(BoundLabel label)
{
int target = label.target();
if (!target)
target = outOfLineJumpOffset(m_currentLocation);
auto targetOffset = target + m_currentLocation;
m_out.print(target, "(->", targetOffset, ")");
}
template<class Block>
UTF8CString BytecodeDumper<Block>::registerName(VirtualRegister r) const
{
if (r.isConstant())
return constantName(r);
return toUTF8CString(r);
}
template <class Block>
int BytecodeDumper<Block>::outOfLineJumpOffset(JSInstructionStream::Offset offset) const
{
return m_block->outOfLineJumpOffset(offset);
}
template<class Block>
UTF8CString BytecodeDumper<Block>::constantName(VirtualRegister reg) const
{
if (reg.toConstantIndex() >= (int) block()->constantRegisters().size())
return toUTF8CString("INVALID_CONSTANT(", reg, ")");
auto value = block()->getConstant(reg);
return toUTF8CString(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.print(" k", static_cast<unsigned>(i), " = ", constant.get(), sourceCodeRepresentationDescription, "\n");
++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& unlinkedTable = this->block()->unlinkedSwitchJumpTable(i);
int entry = 0;
auto end = unlinkedTable.m_branchOffsets.end();
if (unlinkedTable.isList()) {
for (auto iter = unlinkedTable.m_branchOffsets.begin(); iter != end;) {
int32_t value = *iter++;
int32_t target = *iter++;
this->m_out.printf("\t\t%4d => %04d\n", value, target);
}
} else {
for (auto iter = unlinkedTable.m_branchOffsets.begin(); iter != end; ++iter, ++entry) {
if (!*iter)
continue;
this->m_out.printf("\t\t%4d => %04d\n", entry + unlinkedTable.m_min, *iter);
}
}
this->m_out.printf("\t\tdefault => %04d\n", unlinkedTable.m_defaultOffset);
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);
auto& unlinkedTable = this->block()->unlinkedStringSwitchJumpTable(i);
for (const auto& entry : unlinkedTable.m_offsetTable) {
this->m_out.print("\t\t\"", entry.key->utf8(), "\" => ");
this->m_out.printf("%04d\n", entry.value.m_branchOffset);
}
this->m_out.printf("\t\tdefault => %04d\n", unlinkedTable.m_defaultOffset);
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(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>;
}
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END