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Commit	Line	Data
81345200 A	1	/*
	2	* Copyright (C) 2014 Apple Inc. All rights reserved.
	3	*
	4	* Redistribution and use in source and binary forms, with or without
	5	* modification, are permitted provided that the following conditions
	6	* are met:
	7	* 1. Redistributions of source code must retain the above copyright
	8	* notice, this list of conditions and the following disclaimer.
	9	* 2. Redistributions in binary form must reproduce the above copyright
	10	* notice, this list of conditions and the following disclaimer in the
	11	* documentation and/or other materials provided with the distribution.
	12	*
	13	* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
	14	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
	15	* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	16	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
	17	* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	18	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	19	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	20	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	21	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	22	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
	23	* THE POSSIBILITY OF SUCH DAMAGE.
	24	*/
	25
	26	#ifndef FTLDWARFDebugLineInfo_h
	27	#define FTLDWARFDebugLineInfo_h
	28
	29	#if ENABLE(FTL_JIT)
	30
	31	#include <wtf/Vector.h>
	32	#include <wtf/text/WTFString.h>
	33
	34	namespace JSC { namespace FTL {
	35
	36	class DebugLineInterpreter {
	37	public:
	38	DebugLineInterpreter(const char* program);
	39
	40	void run();
	41
	42	private:
	43	struct FileEntry {
	44	String name;
	45	uint32_t directoryIndex;
	46	uint32_t lastModified;
	47	uint32_t size;
	48	};
	49
	50	void resetInterpreterState();
	51	void interpretStatementProgram();
	52	bool interpretOpcode(const char*&);
	53	void parsePrologue();
	54	void parseIncludeDirectories(const char*&);
	55	void parseFileEntries(const char*&);
	56	bool parseFileEntry(const char*&, DebugLineInterpreter::FileEntry&);
	57	uint32_t parseULEB128(const char*&);
	58	int32_t parseSLEB128(const char*&);
	59
	60	const char* m_program;
	61	bool m_logResults;
	62
	63	struct LineInfo {
	64	size_t address;
65	uint32_t file;
66	uint32_t line;
67	uint32_t column;
68	uint32_t isa;
69	bool isStatement;
70	bool isBasicBlock;
71	bool endSequence;
72	bool prologueEnd;
73	bool epilogueBegin;
74	};
75
76	void printLineInfo(LineInfo&);
77	void printLineInfo();
78
79	LineInfo m_currentState;
80	Vector<LineInfo> m_lineInfoMatrix;
81
82	enum DwarfFormat {
83	SixtyFourBit,
84	ThirtyTwoBit
85	};
86
87	struct Prologue {
88	Prologue()
89	: totalLength(0)
90	, format(ThirtyTwoBit)
91	, version(0)
92	, prologueLength(0)
93	, minimumInstructionLength(0)
94	, defaultIsStatement(0)
95	, lineBase(0)
96	, lineRange(0)
97	, opcodeBase(0)
98	{
99	}
100
101	uint64_t totalLength;
102	DwarfFormat format;
103	uint16_t version;
104	uint64_t prologueLength;
105	uint8_t minimumInstructionLength;
106	uint8_t defaultIsStatement;
107	int8_t lineBase;
108	uint8_t lineRange;
109	uint8_t opcodeBase;
110	Vector<uint8_t> standardOpcodeLengths;
111	Vector<String> includeDirectories;
112	Vector<FileEntry> fileEntries;
113	} m_prologue;
114
115	enum ExtendedOpcode {
116	DW_LNE_end_sequence = 0x1,
117	DW_LNE_set_address = 0x2,
118	DW_LNE_define_file = 0x3
119	};
120
121	enum StandardOpcode {
122	ExtendedOpcodes = 0x0,
123	DW_LNS_copy = 0x1,
124	DW_LNS_advance_pc = 0x2,
125	DW_LNS_advance_line = 0x3,
126	DW_LNS_set_file = 0x4,
127	DW_LNS_set_column = 0x5,
128	DW_LNS_negate_stmt = 0x6,
129	DW_LNS_set_basic_block = 0x7,
130	DW_LNS_const_add_pc = 0x8,
131	DW_LNS_fixed_advance_pc = 0x9,
132	DW_LNS_set_prologue_end = 0xa,
133	DW_LNS_set_epilogue_begin = 0xb,
134	DW_LNS_set_isa = 0xc
135	};
136	};
137
138	} } // namespace JSC::FTL
139
140	#endif // ENABLE(FTL_JIT)
141
142	#endif // FTLDWARFDebugLineInfo_h