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1 /*
2  * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
3  * Copyright (C) 2008 Cameron Zwarich <cwzwarich@uwaterloo.ca>
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *
9  * 1.  Redistributions of source code must retain the above copyright
10  *     notice, this list of conditions and the following disclaimer.
11  * 2.  Redistributions in binary form must reproduce the above copyright
12  *     notice, this list of conditions and the following disclaimer in the
13  *     documentation and/or other materials provided with the distribution.
14  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
15  *     its contributors may be used to endorse or promote products derived
16  *     from this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
19  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
22  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28  */
29 
30 #ifndef Opcode_h
31 #define Opcode_h
32 
33 #include <algorithm>
34 #include <string.h>
35 
36 #include <wtf/Assertions.h>
37 
38 namespace JSC {
39 
40     #define FOR_EACH_OPCODE_ID(macro) \
41         macro(op_enter, 1) \
42         macro(op_create_activation, 2) \
43         macro(op_init_lazy_reg, 2) \
44         macro(op_create_arguments, 2) \
45         macro(op_create_this, 3) \
46         macro(op_get_callee, 2) \
47         macro(op_convert_this, 2) \
48         macro(op_convert_this_strict, 2) \
49         \
50         macro(op_new_object, 2) \
51         macro(op_new_array, 4) \
52         macro(op_new_regexp, 3) \
53         macro(op_mov, 3) \
54         \
55         macro(op_not, 3) \
56         macro(op_eq, 4) \
57         macro(op_eq_null, 3) \
58         macro(op_neq, 4) \
59         macro(op_neq_null, 3) \
60         macro(op_stricteq, 4) \
61         macro(op_nstricteq, 4) \
62         macro(op_less, 4) \
63         macro(op_lesseq, 4) \
64         \
65         macro(op_pre_inc, 2) \
66         macro(op_pre_dec, 2) \
67         macro(op_post_inc, 3) \
68         macro(op_post_dec, 3) \
69         macro(op_to_jsnumber, 3) \
70         macro(op_negate, 3) \
71         macro(op_add, 5) \
72         macro(op_mul, 5) \
73         macro(op_div, 5) \
74         macro(op_mod, 4) \
75         macro(op_sub, 5) \
76         \
77         macro(op_lshift, 4) \
78         macro(op_rshift, 4) \
79         macro(op_urshift, 4) \
80         macro(op_bitand, 5) \
81         macro(op_bitxor, 5) \
82         macro(op_bitor, 5) \
83         macro(op_bitnot, 3) \
84         \
85         macro(op_check_has_instance, 2) \
86         macro(op_instanceof, 5) \
87         macro(op_typeof, 3) \
88         macro(op_is_undefined, 3) \
89         macro(op_is_boolean, 3) \
90         macro(op_is_number, 3) \
91         macro(op_is_string, 3) \
92         macro(op_is_object, 3) \
93         macro(op_is_function, 3) \
94         macro(op_in, 4) \
95         \
96         macro(op_resolve, 3) \
97         macro(op_resolve_skip, 4) \
98         macro(op_resolve_global, 5) \
99         macro(op_resolve_global_dynamic, 6) \
100         macro(op_get_scoped_var, 4) \
101         macro(op_put_scoped_var, 4) \
102         macro(op_get_global_var, 3) \
103         macro(op_put_global_var, 3) \
104         macro(op_resolve_base, 4) \
105         macro(op_ensure_property_exists, 3) \
106         macro(op_resolve_with_base, 4) \
107         macro(op_get_by_id, 8) \
108         macro(op_get_by_id_self, 8) \
109         macro(op_get_by_id_self_list, 8) \
110         macro(op_get_by_id_proto, 8) \
111         macro(op_get_by_id_proto_list, 8) \
112         macro(op_get_by_id_chain, 8) \
113         macro(op_get_by_id_getter_self, 8) \
114         macro(op_get_by_id_getter_self_list, 8) \
115         macro(op_get_by_id_getter_proto, 8) \
116         macro(op_get_by_id_getter_proto_list, 8) \
117         macro(op_get_by_id_getter_chain, 8) \
118         macro(op_get_by_id_custom_self, 8) \
119         macro(op_get_by_id_custom_self_list, 8) \
120         macro(op_get_by_id_custom_proto, 8) \
121         macro(op_get_by_id_custom_proto_list, 8) \
122         macro(op_get_by_id_custom_chain, 8) \
123         macro(op_get_by_id_generic, 8) \
124         macro(op_get_array_length, 8) \
125         macro(op_get_string_length, 8) \
126         macro(op_get_arguments_length, 4) \
127         macro(op_put_by_id, 9) \
128         macro(op_put_by_id_transition, 9) \
129         macro(op_put_by_id_replace, 9) \
130         macro(op_put_by_id_generic, 9) \
131         macro(op_del_by_id, 4) \
132         macro(op_get_by_val, 4) \
133         macro(op_get_argument_by_val, 4) \
134         macro(op_get_by_pname, 7) \
135         macro(op_put_by_val, 4) \
136         macro(op_del_by_val, 4) \
137         macro(op_put_by_index, 4) \
138         macro(op_put_getter, 4) \
139         macro(op_put_setter, 4) \
140         \
141         macro(op_jmp, 2) \
142         macro(op_jtrue, 3) \
143         macro(op_jfalse, 3) \
144         macro(op_jeq_null, 3) \
145         macro(op_jneq_null, 3) \
146         macro(op_jneq_ptr, 4) \
147         macro(op_jnless, 4) \
148         macro(op_jnlesseq, 4) \
149         macro(op_jless, 4) \
150         macro(op_jlesseq, 4) \
151         macro(op_jmp_scopes, 3) \
152         macro(op_loop, 2) \
153         macro(op_loop_if_true, 3) \
154         macro(op_loop_if_false, 3) \
155         macro(op_loop_if_less, 4) \
156         macro(op_loop_if_lesseq, 4) \
157         macro(op_switch_imm, 4) \
158         macro(op_switch_char, 4) \
159         macro(op_switch_string, 4) \
160         \
161         macro(op_new_func, 4) \
162         macro(op_new_func_exp, 3) \
163         macro(op_call, 4) \
164         macro(op_call_eval, 4) \
165         macro(op_call_varargs, 4) \
166         macro(op_load_varargs, 4) \
167         macro(op_tear_off_activation, 3) \
168         macro(op_tear_off_arguments, 2) \
169         macro(op_ret, 2) \
170         macro(op_call_put_result, 2) \
171         macro(op_ret_object_or_this, 3) \
172         macro(op_method_check, 1) \
173         \
174         macro(op_construct, 4) \
175         macro(op_strcat, 4) \
176         macro(op_to_primitive, 3) \
177         \
178         macro(op_get_pnames, 6) \
179         macro(op_next_pname, 7) \
180         \
181         macro(op_push_scope, 2) \
182         macro(op_pop_scope, 1) \
183         macro(op_push_new_scope, 4) \
184         \
185         macro(op_catch, 2) \
186         macro(op_throw, 2) \
187         macro(op_throw_reference_error, 2) \
188         \
189         macro(op_jsr, 3) \
190         macro(op_sret, 2) \
191         \
192         macro(op_debug, 4) \
193         macro(op_profile_will_call, 2) \
194         macro(op_profile_did_call, 2) \
195         \
196         macro(op_end, 2) // end must be the last opcode in the list
197 
198     #define OPCODE_ID_ENUM(opcode, length) opcode,
199         typedef enum { FOR_EACH_OPCODE_ID(OPCODE_ID_ENUM) } OpcodeID;
200     #undef OPCODE_ID_ENUM
201 
202     const int numOpcodeIDs = op_end + 1;
203 
204     #define OPCODE_ID_LENGTHS(id, length) const int id##_length = length;
205          FOR_EACH_OPCODE_ID(OPCODE_ID_LENGTHS);
206     #undef OPCODE_ID_LENGTHS
207 
208     #define OPCODE_LENGTH(opcode) opcode##_length
209 
210     #define OPCODE_ID_LENGTH_MAP(opcode, length) length,
211         const int opcodeLengths[numOpcodeIDs] = { FOR_EACH_OPCODE_ID(OPCODE_ID_LENGTH_MAP) };
212     #undef OPCODE_ID_LENGTH_MAP
213 
214     #define VERIFY_OPCODE_ID(id, size) COMPILE_ASSERT(id <= op_end, ASSERT_THAT_JS_OPCODE_IDS_ARE_VALID);
215         FOR_EACH_OPCODE_ID(VERIFY_OPCODE_ID);
216     #undef VERIFY_OPCODE_ID
217 
218 #if ENABLE(COMPUTED_GOTO_INTERPRETER)
219 #if COMPILER(RVCT) || COMPILER(INTEL)
220     typedef void* Opcode;
221 #else
222     typedef const void* Opcode;
223 #endif
224 #else
225     typedef OpcodeID Opcode;
226 #endif
227 
228 #if ENABLE(OPCODE_SAMPLING) || ENABLE(CODEBLOCK_SAMPLING) || ENABLE(OPCODE_STATS)
229 
230 #define PADDING_STRING "                                "
231 #define PADDING_STRING_LENGTH static_cast<unsigned>(strlen(PADDING_STRING))
232 
233     extern const char* const opcodeNames[];
234 
padOpcodeName(OpcodeID op,unsigned width)235     inline const char* padOpcodeName(OpcodeID op, unsigned width)
236     {
237         unsigned pad = width - strlen(opcodeNames[op]);
238         pad = std::min(pad, PADDING_STRING_LENGTH);
239         return PADDING_STRING + PADDING_STRING_LENGTH - pad;
240     }
241 
242 #undef PADDING_STRING_LENGTH
243 #undef PADDING_STRING
244 
245 #endif
246 
247 #if ENABLE(OPCODE_STATS)
248 
249     struct OpcodeStats {
250         OpcodeStats();
251         ~OpcodeStats();
252         static long long opcodeCounts[numOpcodeIDs];
253         static long long opcodePairCounts[numOpcodeIDs][numOpcodeIDs];
254         static int lastOpcode;
255 
256         static void recordInstruction(int opcode);
257         static void resetLastInstruction();
258     };
259 
260 #endif
261 
opcodeLength(OpcodeID opcode)262     inline size_t opcodeLength(OpcodeID opcode)
263     {
264         switch (opcode) {
265 #define OPCODE_ID_LENGTHS(id, length) case id: return OPCODE_LENGTH(id);
266              FOR_EACH_OPCODE_ID(OPCODE_ID_LENGTHS)
267 #undef OPCODE_ID_LENGTHS
268         }
269         ASSERT_NOT_REACHED();
270         return 0;
271     }
272 
273 } // namespace JSC
274 
275 #endif // Opcode_h
276