Source/JavaScriptCore/ftl/FTLDWARFDebugLineInfo.cpp - WebKit - Git at Google

 /*
  * Copyright (C) 2014 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 "FTLDWARFDebugLineInfo.h"

 #if ENABLE(FTL_JIT)

 #include <wtf/DataLog.h>

 namespace JSC { namespace FTL {

 DebugLineInterpreter::DebugLineInterpreter(const char* program)
     : m_program(program)
     , m_logResults(false)
 {
     resetInterpreterState();
 }

 template <typename T> inline T read(const char*& program)
 {
     T result = *reinterpret_cast<const T*>(program);
     program += sizeof(T);
     return result;
 }

 uint32_t DebugLineInterpreter::parseULEB128(const char*& offset)
 {
     uint32_t result = 0;
     uint8_t byte;
     unsigned shiftAmount = 0;
     do {
         byte = read<uint8_t>(offset);
         result |= (byte & ~0x80) << shiftAmount;
         shiftAmount += 7;
     } while (byte & 0x80);
     return result;
 }

 int32_t DebugLineInterpreter::parseSLEB128(const char*& offset)
 {
     int32_t result = 0;
     uint8_t byte;
     unsigned shiftAmount = 0;
     do {
         byte = read<uint8_t>(offset);
         result |= (byte & ~0x80) << shiftAmount;
         shiftAmount += 7;
     } while (byte & 0x80);

     // If the sign bit (in this case, the second MSB) on the last byte is set we need to zero extend.
     if (byte & 0x40)
         result |= -(1 << shiftAmount);
     return result;
 }

 void DebugLineInterpreter::run()
 {
     parsePrologue();
     interpretStatementProgram();
     if (m_logResults)
         printLineInfo();
 }

 void DebugLineInterpreter::parsePrologue()
 {
     const char* currentProgramOffset = m_program;
     m_prologue.totalLength = read<uint32_t>(currentProgramOffset);
     if (m_prologue.totalLength == 0xffffffff) {
         // This is 64-bit DWARF format.
         m_prologue.format = SixtyFourBit;
         m_prologue.totalLength = read<uint64_t>(currentProgramOffset);
     } else
         m_prologue.format = ThirtyTwoBit;
     m_prologue.version = read<uint16_t>(currentProgramOffset);

     if (m_prologue.format == ThirtyTwoBit)
         m_prologue.prologueLength = read<uint32_t>(currentProgramOffset);
     else
         m_prologue.prologueLength = read<uint64_t>(currentProgramOffset);
     const char* afterLengthOffset = currentProgramOffset;

     m_prologue.minimumInstructionLength = read<uint8_t>(currentProgramOffset);
     m_prologue.defaultIsStatement = read<uint8_t>(currentProgramOffset);
     m_prologue.lineBase = read<int8_t>(currentProgramOffset);
     m_prologue.lineRange = read<uint8_t>(currentProgramOffset);
     m_prologue.opcodeBase = read<uint8_t>(currentProgramOffset);
     for (unsigned i = 1; i < m_prologue.opcodeBase; ++i)
         m_prologue.standardOpcodeLengths.append(read<uint8_t>(currentProgramOffset));
     parseIncludeDirectories(currentProgramOffset);
     parseFileEntries(currentProgramOffset);

     m_program = afterLengthOffset + m_prologue.prologueLength;

     if (!m_logResults)
         return;

     dataLog("\nPrologue:\n");
     dataLog("totalLength = ", m_prologue.totalLength, "\n");
     dataLog("version = ", m_prologue.version, "\n");
     dataLog("prologueLength = ", m_prologue.prologueLength, "\n");
     dataLog("minimumInstructionLength = ", m_prologue.minimumInstructionLength, "\n");
     dataLog("defaultIsStatement = ", m_prologue.defaultIsStatement, "\n");
     dataLog("lineBase = ", m_prologue.lineBase, "\n");
     dataLog("lineRange = ", m_prologue.lineRange, "\n");
     dataLog("opcodeBase = ", m_prologue.opcodeBase, "\n");

     dataLog("\nStandard Opcode Lengths:\n");
     for (unsigned i = 1; i < m_prologue.opcodeBase; ++i)
         dataLog("standardOpcodeLengths[", i - 1, "] = ", m_prologue.standardOpcodeLengths[i - 1], "\n");

     dataLog("\nInclude Directories:\n");
     for (unsigned i = 0; i < m_prologue.includeDirectories.size(); ++i)
         dataLog("includeDirectories[", i, "] = ", m_prologue.includeDirectories[i], "\n");

     dataLog("\nFiles:\n");
     for (unsigned i = 0; i < m_prologue.fileEntries.size(); ++i) {
         FileEntry& entry = m_prologue.fileEntries[i];
         dataLog("fileEntries[", i, "] = {name: \"", entry.name, "\", dir_index: ", entry.directoryIndex, ", last_modified: ", entry.lastModified, ", size: ", entry.size, "}\n");
     }
 }

 void DebugLineInterpreter::parseIncludeDirectories(const char*& offset)
 {
     size_t length = 0;
     while ((length = strlen(offset))) {
         m_prologue.includeDirectories.append(offset);
         offset += length + 1;
     }

     // Extra increment to get past the last null byte.
     offset += 1;
 }

 void DebugLineInterpreter::parseFileEntries(const char*& offset)
 {
     while (true) {
         DebugLineInterpreter::FileEntry nextEntry;
         if (!parseFileEntry(offset, nextEntry))
             break;
         m_prologue.fileEntries.append(nextEntry);
     }
 }

 bool DebugLineInterpreter::parseFileEntry(const char*& offset, FileEntry& entry)
 {
     size_t length = strlen(offset);
     if (!length) {
         offset += 1;
         return false;
     }
     entry.name = offset;
     offset += length + 1;
     entry.directoryIndex = parseULEB128(offset);
     entry.lastModified = parseULEB128(offset);
     entry.size = parseULEB128(offset);

     return true;
 }

 void DebugLineInterpreter::interpretStatementProgram()
 {
     const char* currentProgramOffset = m_program;
     bool keepGoing = true;
     do {
         keepGoing = interpretOpcode(currentProgramOffset);
     } while (keepGoing);
 }

 bool DebugLineInterpreter::interpretOpcode(const char*& offset)
 {
     uint8_t nextOpcode = read<uint8_t>(offset);
     switch (nextOpcode) {
     case ExtendedOpcodes: {
         uint32_t length = parseULEB128(offset);
         if (!length)
             return false;
         uint8_t extendedOpcode = read<uint8_t>(offset);
         switch (extendedOpcode) {
         case DW_LNE_end_sequence: {
             m_currentState.endSequence = true;
             m_lineInfoMatrix.append(m_currentState);
             resetInterpreterState();
             break;
         }
         case DW_LNE_set_address: {
             m_currentState.address = read<size_t>(offset);
             break;
         }
         case DW_LNE_define_file: {
             fprintf(stderr, "Unimplemented extended opcode DW_LNE_define_file.\n");
             RELEASE_ASSERT_NOT_REACHED();
             break;
         }
         default: {
             fprintf(stderr, "Unknown extended opcode.\n");
             RELEASE_ASSERT_NOT_REACHED();
             break;
         }
         }
         break;
     }
         /* Standard opcodes */
     case DW_LNS_copy: {
         m_lineInfoMatrix.append(m_currentState);
         m_currentState.isBasicBlock = false;
         m_currentState.prologueEnd = false;
         m_currentState.epilogueBegin = false;
         break;
     }
     case DW_LNS_advance_pc: {
         uint32_t advance = parseULEB128(offset);
         m_currentState.address += advance * m_prologue.minimumInstructionLength;
         break;
     }
     case DW_LNS_advance_line: {
         int32_t advance = parseSLEB128(offset);
         m_currentState.line += advance;
         break;
     }
     case DW_LNS_set_file: {
         uint32_t fileIndex = parseULEB128(offset);
         m_currentState.file = fileIndex;
         break;
     }
     case DW_LNS_set_column: {
         m_currentState.column = parseULEB128(offset);
         break;
     }
     case DW_LNS_negate_stmt: {
         m_currentState.isStatement = !m_currentState.isStatement;
         break;
     }
     case DW_LNS_set_basic_block: {
         m_currentState.isBasicBlock = true;
         break;
     }
     case DW_LNS_const_add_pc: {
         uint8_t adjustedOpcode = nextOpcode - m_prologue.opcodeBase;
         uint32_t addressIncrement = (adjustedOpcode / m_prologue.lineRange) * m_prologue.minimumInstructionLength;
         m_currentState.address += addressIncrement;
         break;
     }
     case DW_LNS_fixed_advance_pc: {
         uint16_t advance = read<uint16_t>(offset);
         m_currentState.address += advance;
         break;
     }
     case DW_LNS_set_prologue_end: {
         m_currentState.prologueEnd = true;
         break;
     }
     case DW_LNS_set_epilogue_begin: {
         m_currentState.epilogueBegin = true;
         break;
     }
     case DW_LNS_set_isa: {
         m_currentState.isa = parseULEB128(offset);
         break;
     }
         /* Special opcodes */
     default: {
         uint8_t adjustedOpcode = nextOpcode - m_prologue.opcodeBase;
         uint32_t addressIncrement = (adjustedOpcode / m_prologue.lineRange) * m_prologue.minimumInstructionLength;
         int32_t lineIncrement = m_prologue.lineBase + (adjustedOpcode % m_prologue.lineRange);
         m_currentState.address += addressIncrement;
         m_currentState.line += lineIncrement;
         m_lineInfoMatrix.append(m_currentState);
         m_currentState.isBasicBlock = false;
         m_currentState.prologueEnd = false;
         m_currentState.epilogueBegin = false;
         break;
     }
     }
     return true;
 }

 void DebugLineInterpreter::printLineInfo()
 {
     dataLog("\nLine Info Matrix:\n");
     for (unsigned i = 0; i < m_lineInfoMatrix.size(); ++i)
         printLineInfo(m_lineInfoMatrix[i]);
     dataLog("\n");
 }

 void DebugLineInterpreter::printLineInfo(LineInfo& info)
 {
     dataLogF("address: %p", reinterpret_cast<void*>(info.address));
     dataLog("  file: ", info.file, "  line: ", info.line, "  column: ", info.column, "  isa: ", info.isa, "  ");
     dataLog("  statement?: ", info.isStatement);
     dataLog("  basic block?: ", info.isBasicBlock);
     dataLog("  end sequence?: ", info.endSequence);
     dataLog("  prologue end?: ", info.prologueEnd);
     dataLog("  epilogue begin?: ", info.epilogueBegin);
     dataLog("\n");
 }

 void DebugLineInterpreter::resetInterpreterState()
 {
     m_currentState.address = 0;
     m_currentState.file = 1;
     m_currentState.line = 1;
     m_currentState.column = 0;
     m_currentState.isa = 0;
     m_currentState.isStatement = false;
     m_currentState.isBasicBlock = false;
     m_currentState.endSequence = false;
     m_currentState.prologueEnd = false;
     m_currentState.epilogueBegin = false;
 }

 } } // namespace JSC::FTL

 #endif // ENABLE(FTL_JIT)
	/*
	* Copyright (C) 2014 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 "FTLDWARFDebugLineInfo.h"

	#if ENABLE(FTL_JIT)

	#include <wtf/DataLog.h>

	namespace JSC { namespace FTL {

	DebugLineInterpreter::DebugLineInterpreter(const char* program)
	: m_program(program)
	, m_logResults(false)
	{
	resetInterpreterState();
	}

	template <typename T> inline T read(const char*& program)
	{
	T result = reinterpret_cast<const T>(program);
	program += sizeof(T);
	return result;
	}

	uint32_t DebugLineInterpreter::parseULEB128(const char*& offset)
	{
	uint32_t result = 0;
	uint8_t byte;
	unsigned shiftAmount = 0;
	do {
	byte = read<uint8_t>(offset);
	result \|= (byte & ~0x80) << shiftAmount;
	shiftAmount += 7;
	} while (byte & 0x80);
	return result;
	}

	int32_t DebugLineInterpreter::parseSLEB128(const char*& offset)
	{
	int32_t result = 0;
	uint8_t byte;
	unsigned shiftAmount = 0;
	do {
	byte = read<uint8_t>(offset);
	result \|= (byte & ~0x80) << shiftAmount;
	shiftAmount += 7;
	} while (byte & 0x80);

	// If the sign bit (in this case, the second MSB) on the last byte is set we need to zero extend.
	if (byte & 0x40)
	result \|= -(1 << shiftAmount);
	return result;
	}

	void DebugLineInterpreter::run()
	{
	parsePrologue();
	interpretStatementProgram();
	if (m_logResults)
	printLineInfo();
	}

	void DebugLineInterpreter::parsePrologue()
	{
	const char* currentProgramOffset = m_program;
	m_prologue.totalLength = read<uint32_t>(currentProgramOffset);
	if (m_prologue.totalLength == 0xffffffff) {
	// This is 64-bit DWARF format.
	m_prologue.format = SixtyFourBit;
	m_prologue.totalLength = read<uint64_t>(currentProgramOffset);
	} else
	m_prologue.format = ThirtyTwoBit;
	m_prologue.version = read<uint16_t>(currentProgramOffset);

	if (m_prologue.format == ThirtyTwoBit)
	m_prologue.prologueLength = read<uint32_t>(currentProgramOffset);
	else
	m_prologue.prologueLength = read<uint64_t>(currentProgramOffset);
	const char* afterLengthOffset = currentProgramOffset;

	m_prologue.minimumInstructionLength = read<uint8_t>(currentProgramOffset);
	m_prologue.defaultIsStatement = read<uint8_t>(currentProgramOffset);
	m_prologue.lineBase = read<int8_t>(currentProgramOffset);
	m_prologue.lineRange = read<uint8_t>(currentProgramOffset);
	m_prologue.opcodeBase = read<uint8_t>(currentProgramOffset);
	for (unsigned i = 1; i < m_prologue.opcodeBase; ++i)
	m_prologue.standardOpcodeLengths.append(read<uint8_t>(currentProgramOffset));
	parseIncludeDirectories(currentProgramOffset);
	parseFileEntries(currentProgramOffset);

	m_program = afterLengthOffset + m_prologue.prologueLength;

	if (!m_logResults)
	return;

	dataLog("\nPrologue:\n");
	dataLog("totalLength = ", m_prologue.totalLength, "\n");
	dataLog("version = ", m_prologue.version, "\n");
	dataLog("prologueLength = ", m_prologue.prologueLength, "\n");
	dataLog("minimumInstructionLength = ", m_prologue.minimumInstructionLength, "\n");
	dataLog("defaultIsStatement = ", m_prologue.defaultIsStatement, "\n");
	dataLog("lineBase = ", m_prologue.lineBase, "\n");
	dataLog("lineRange = ", m_prologue.lineRange, "\n");
	dataLog("opcodeBase = ", m_prologue.opcodeBase, "\n");

	dataLog("\nStandard Opcode Lengths:\n");
	for (unsigned i = 1; i < m_prologue.opcodeBase; ++i)
	dataLog("standardOpcodeLengths[", i - 1, "] = ", m_prologue.standardOpcodeLengths[i - 1], "\n");

	dataLog("\nInclude Directories:\n");
	for (unsigned i = 0; i < m_prologue.includeDirectories.size(); ++i)
	dataLog("includeDirectories[", i, "] = ", m_prologue.includeDirectories[i], "\n");

	dataLog("\nFiles:\n");
	for (unsigned i = 0; i < m_prologue.fileEntries.size(); ++i) {
	FileEntry& entry = m_prologue.fileEntries[i];
	dataLog("fileEntries[", i, "] = {name: \"", entry.name, "\", dir_index: ", entry.directoryIndex, ", last_modified: ", entry.lastModified, ", size: ", entry.size, "}\n");
	}
	}

	void DebugLineInterpreter::parseIncludeDirectories(const char*& offset)
	{
	size_t length = 0;
	while ((length = strlen(offset))) {
	m_prologue.includeDirectories.append(offset);
	offset += length + 1;
	}

	// Extra increment to get past the last null byte.
	offset += 1;
	}

	void DebugLineInterpreter::parseFileEntries(const char*& offset)
	{
	while (true) {
	DebugLineInterpreter::FileEntry nextEntry;
	if (!parseFileEntry(offset, nextEntry))
	break;
	m_prologue.fileEntries.append(nextEntry);
	}
	}

	bool DebugLineInterpreter::parseFileEntry(const char*& offset, FileEntry& entry)
	{
	size_t length = strlen(offset);
	if (!length) {
	offset += 1;
	return false;
	}
	entry.name = offset;
	offset += length + 1;
	entry.directoryIndex = parseULEB128(offset);
	entry.lastModified = parseULEB128(offset);
	entry.size = parseULEB128(offset);

	return true;
	}

	void DebugLineInterpreter::interpretStatementProgram()
	{
	const char* currentProgramOffset = m_program;
	bool keepGoing = true;
	do {
	keepGoing = interpretOpcode(currentProgramOffset);
	} while (keepGoing);
	}

	bool DebugLineInterpreter::interpretOpcode(const char*& offset)
	{
	uint8_t nextOpcode = read<uint8_t>(offset);
	switch (nextOpcode) {
	case ExtendedOpcodes: {
	uint32_t length = parseULEB128(offset);
	if (!length)
	return false;
	uint8_t extendedOpcode = read<uint8_t>(offset);
	switch (extendedOpcode) {
	case DW_LNE_end_sequence: {
	m_currentState.endSequence = true;
	m_lineInfoMatrix.append(m_currentState);
	resetInterpreterState();
	break;
	}
	case DW_LNE_set_address: {
	m_currentState.address = read<size_t>(offset);
	break;
	}
	case DW_LNE_define_file: {
	fprintf(stderr, "Unimplemented extended opcode DW_LNE_define_file.\n");
	RELEASE_ASSERT_NOT_REACHED();
	break;
	}
	default: {
	fprintf(stderr, "Unknown extended opcode.\n");
	RELEASE_ASSERT_NOT_REACHED();
	break;
	}
	}
	break;
	}
	/* Standard opcodes */
	case DW_LNS_copy: {
	m_lineInfoMatrix.append(m_currentState);
	m_currentState.isBasicBlock = false;
	m_currentState.prologueEnd = false;
	m_currentState.epilogueBegin = false;
	break;
	}
	case DW_LNS_advance_pc: {
	uint32_t advance = parseULEB128(offset);
	m_currentState.address += advance * m_prologue.minimumInstructionLength;
	break;
	}
	case DW_LNS_advance_line: {
	int32_t advance = parseSLEB128(offset);
	m_currentState.line += advance;
	break;
	}
	case DW_LNS_set_file: {
	uint32_t fileIndex = parseULEB128(offset);
	m_currentState.file = fileIndex;
	break;
	}
	case DW_LNS_set_column: {
	m_currentState.column = parseULEB128(offset);
	break;
	}
	case DW_LNS_negate_stmt: {
	m_currentState.isStatement = !m_currentState.isStatement;
	break;
	}
	case DW_LNS_set_basic_block: {
	m_currentState.isBasicBlock = true;
	break;
	}
	case DW_LNS_const_add_pc: {
	uint8_t adjustedOpcode = nextOpcode - m_prologue.opcodeBase;
	uint32_t addressIncrement = (adjustedOpcode / m_prologue.lineRange) * m_prologue.minimumInstructionLength;
	m_currentState.address += addressIncrement;
	break;
	}
	case DW_LNS_fixed_advance_pc: {
	uint16_t advance = read<uint16_t>(offset);
	m_currentState.address += advance;
	break;
	}
	case DW_LNS_set_prologue_end: {
	m_currentState.prologueEnd = true;
	break;
	}
	case DW_LNS_set_epilogue_begin: {
	m_currentState.epilogueBegin = true;
	break;
	}
	case DW_LNS_set_isa: {
	m_currentState.isa = parseULEB128(offset);
	break;
	}
	/* Special opcodes */
	default: {
	uint8_t adjustedOpcode = nextOpcode - m_prologue.opcodeBase;
	uint32_t addressIncrement = (adjustedOpcode / m_prologue.lineRange) * m_prologue.minimumInstructionLength;
	int32_t lineIncrement = m_prologue.lineBase + (adjustedOpcode % m_prologue.lineRange);
	m_currentState.address += addressIncrement;
	m_currentState.line += lineIncrement;
	m_lineInfoMatrix.append(m_currentState);
	m_currentState.isBasicBlock = false;
	m_currentState.prologueEnd = false;
	m_currentState.epilogueBegin = false;
	break;
	}
	}
	return true;
	}

	void DebugLineInterpreter::printLineInfo()
	{
	dataLog("\nLine Info Matrix:\n");
	for (unsigned i = 0; i < m_lineInfoMatrix.size(); ++i)
	printLineInfo(m_lineInfoMatrix[i]);
	dataLog("\n");
	}

	void DebugLineInterpreter::printLineInfo(LineInfo& info)
	{
	dataLogF("address: %p", reinterpret_cast<void*>(info.address));
	dataLog(" file: ", info.file, " line: ", info.line, " column: ", info.column, " isa: ", info.isa, " ");
	dataLog(" statement?: ", info.isStatement);
	dataLog(" basic block?: ", info.isBasicBlock);
	dataLog(" end sequence?: ", info.endSequence);
	dataLog(" prologue end?: ", info.prologueEnd);
	dataLog(" epilogue begin?: ", info.epilogueBegin);
	dataLog("\n");
	}

	void DebugLineInterpreter::resetInterpreterState()
	{
	m_currentState.address = 0;
	m_currentState.file = 1;
	m_currentState.line = 1;
	m_currentState.column = 0;
	m_currentState.isa = 0;
	m_currentState.isStatement = false;
	m_currentState.isBasicBlock = false;
	m_currentState.endSequence = false;
	m_currentState.prologueEnd = false;
	m_currentState.epilogueBegin = false;
	}

	} } // namespace JSC::FTL

	#endif // ENABLE(FTL_JIT)