2008-12-02 Geoffrey Garen <ggaren@apple.com>
[WebKit-https.git] / JavaScriptCore / bytecode / CodeBlock.cpp
1 /*
2  * Copyright (C) 2008 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 #include "config.h"
31 #include "CodeBlock.h"
32
33 #include "JIT.h"
34 #include "JSValue.h"
35 #include "Interpreter.h"
36 #include "Debugger.h"
37 #include <stdio.h>
38 #include <wtf/StringExtras.h>
39
40 namespace JSC {
41
42 #if !defined(NDEBUG) || ENABLE(OPCODE_SAMPLING)
43
44 static UString escapeQuotes(const UString& str)
45 {
46     UString result = str;
47     int pos = 0;
48     while ((pos = result.find('\"', pos)) >= 0) {
49         result = result.substr(0, pos) + "\"\\\"\"" + result.substr(pos + 1);
50         pos += 4;
51     }
52     return result;
53 }
54
55 static UString valueToSourceString(ExecState* exec, JSValue* val)
56 {
57     if (val->isString()) {
58         UString result("\"");
59         result += escapeQuotes(val->toString(exec)) + "\"";
60         return result;
61     } 
62
63     return val->toString(exec);
64 }
65
66 static CString registerName(int r)
67 {
68     if (r == missingThisObjectMarker())
69         return "<null>";
70
71     return (UString("r") + UString::from(r)).UTF8String();
72 }
73
74 static CString constantName(ExecState* exec, int k, JSValue* value)
75 {
76     return (valueToSourceString(exec, value) + "(@k" + UString::from(k) + ")").UTF8String();
77 }
78
79 static CString idName(int id0, const Identifier& ident)
80 {
81     return (ident.ustring() + "(@id" + UString::from(id0) +")").UTF8String();
82 }
83
84 static UString regexpToSourceString(RegExp* regExp)
85 {
86     UString pattern = UString("/") + regExp->pattern() + "/";
87     if (regExp->global())
88         pattern += "g";
89     if (regExp->ignoreCase())
90         pattern += "i";
91     if (regExp->multiline())
92         pattern += "m";
93
94     return pattern;
95 }
96
97 static CString regexpName(int re, RegExp* regexp)
98 {
99     return (regexpToSourceString(regexp) + "(@re" + UString::from(re) + ")").UTF8String();
100 }
101
102 static UString pointerToSourceString(void* p)
103 {
104     char buffer[2 + 2 * sizeof(void*) + 1]; // 0x [two characters per byte] \0
105     snprintf(buffer, sizeof(buffer), "%p", p);
106     return buffer;
107 }
108
109 NEVER_INLINE static const char* debugHookName(int debugHookID)
110 {
111     switch (static_cast<DebugHookID>(debugHookID)) {
112         case DidEnterCallFrame:
113             return "didEnterCallFrame";
114         case WillLeaveCallFrame:
115             return "willLeaveCallFrame";
116         case WillExecuteStatement:
117             return "willExecuteStatement";
118         case WillExecuteProgram:
119             return "willExecuteProgram";
120         case DidExecuteProgram:
121             return "didExecuteProgram";
122         case DidReachBreakpoint:
123             return "didReachBreakpoint";
124     }
125
126     ASSERT_NOT_REACHED();
127     return "";
128 }
129
130 static int jumpTarget(const Vector<Instruction>::const_iterator& begin, Vector<Instruction>::const_iterator& it, int offset)
131 {
132     return it - begin + offset;
133 }
134
135 static void printUnaryOp(int location, Vector<Instruction>::const_iterator& it, const char* op)
136 {
137     int r0 = (++it)->u.operand;
138     int r1 = (++it)->u.operand;
139
140     printf("[%4d] %s\t\t %s, %s\n", location, op, registerName(r0).c_str(), registerName(r1).c_str());
141 }
142
143 static void printBinaryOp(int location, Vector<Instruction>::const_iterator& it, const char* op)
144 {
145     int r0 = (++it)->u.operand;
146     int r1 = (++it)->u.operand;
147     int r2 = (++it)->u.operand;
148     printf("[%4d] %s\t\t %s, %s, %s\n", location, op, registerName(r0).c_str(), registerName(r1).c_str(), registerName(r2).c_str());
149 }
150
151 static void printConditionalJump(const Vector<Instruction>::const_iterator& begin, Vector<Instruction>::const_iterator& it, int location, const char* op)
152 {
153     int r0 = (++it)->u.operand;
154     int offset = (++it)->u.operand;
155     printf("[%4d] %s\t\t %s, %d(->%d)\n", location, op, registerName(r0).c_str(), offset, jumpTarget(begin, it, offset));
156 }
157
158 static void printGetByIdOp(int location, Vector<Instruction>::const_iterator& it, const Vector<Identifier>& identifiers, const char* op)
159 {
160     int r0 = (++it)->u.operand;
161     int r1 = (++it)->u.operand;
162     int id0 = (++it)->u.operand;
163     printf("[%4d] %s\t %s, %s, %s\n", location, op, registerName(r0).c_str(), registerName(r1).c_str(), idName(id0, identifiers[id0]).c_str());
164     it += 4;
165 }
166
167 static void printPutByIdOp(int location, Vector<Instruction>::const_iterator& it, const Vector<Identifier>& identifiers, const char* op)
168 {
169     int r0 = (++it)->u.operand;
170     int id0 = (++it)->u.operand;
171     int r1 = (++it)->u.operand;
172     printf("[%4d] %s\t %s, %s, %s\n", location, op, registerName(r0).c_str(), idName(id0, identifiers[id0]).c_str(), registerName(r1).c_str());
173     it += 4;
174 }
175
176 void CodeBlock::printStructure(const char* name, const Instruction* vPC, int operand) const
177 {
178     unsigned instructionOffset = vPC - instructions.begin();
179     printf("  [%4d] %s: %s\n", instructionOffset, name, pointerToSourceString(vPC[operand].u.structure).UTF8String().c_str());
180 }
181
182 void CodeBlock::printStructures(const Instruction* vPC) const
183 {
184     Interpreter* interpreter = globalData->interpreter;
185     unsigned instructionOffset = vPC - instructions.begin();
186
187     if (vPC[0].u.opcode == interpreter->getOpcode(op_get_by_id)) {
188         printStructure("get_by_id", vPC, 4);
189         return;
190     }
191     if (vPC[0].u.opcode == interpreter->getOpcode(op_get_by_id_self)) {
192         printStructure("get_by_id_self", vPC, 4);
193         return;
194     }
195     if (vPC[0].u.opcode == interpreter->getOpcode(op_get_by_id_proto)) {
196         printf("  [%4d] %s: %s, %s\n", instructionOffset, "get_by_id_proto", pointerToSourceString(vPC[4].u.structure).UTF8String().c_str(), pointerToSourceString(vPC[5].u.structure).UTF8String().c_str());
197         return;
198     }
199     if (vPC[0].u.opcode == interpreter->getOpcode(op_put_by_id_transition)) {
200         printf("  [%4d] %s: %s, %s, %s\n", instructionOffset, "put_by_id_new", pointerToSourceString(vPC[4].u.structure).UTF8String().c_str(), pointerToSourceString(vPC[5].u.structure).UTF8String().c_str(), pointerToSourceString(vPC[6].u.structureChain).UTF8String().c_str());
201         return;
202     }
203     if (vPC[0].u.opcode == interpreter->getOpcode(op_get_by_id_chain)) {
204         printf("  [%4d] %s: %s, %s\n", instructionOffset, "get_by_id_chain", pointerToSourceString(vPC[4].u.structure).UTF8String().c_str(), pointerToSourceString(vPC[5].u.structureChain).UTF8String().c_str());
205         return;
206     }
207     if (vPC[0].u.opcode == interpreter->getOpcode(op_put_by_id)) {
208         printStructure("put_by_id", vPC, 4);
209         return;
210     }
211     if (vPC[0].u.opcode == interpreter->getOpcode(op_put_by_id_replace)) {
212         printStructure("put_by_id_replace", vPC, 4);
213         return;
214     }
215     if (vPC[0].u.opcode == interpreter->getOpcode(op_resolve_global)) {
216         printStructure("resolve_global", vPC, 4);
217         return;
218     }
219
220     // These instructions doesn't ref Structures.
221     ASSERT(vPC[0].u.opcode == interpreter->getOpcode(op_get_by_id_generic) || vPC[0].u.opcode == interpreter->getOpcode(op_put_by_id_generic) || vPC[0].u.opcode == interpreter->getOpcode(op_call) || vPC[0].u.opcode == interpreter->getOpcode(op_call_eval) || vPC[0].u.opcode == interpreter->getOpcode(op_construct));
222 }
223
224 void CodeBlock::dump(ExecState* exec) const
225 {
226     Vector<Instruction>::const_iterator begin = instructions.begin();
227     Vector<Instruction>::const_iterator end = instructions.end();
228
229     size_t instructionCount = 0;
230     for (Vector<Instruction>::const_iterator it = begin; it != end; ++it)
231         if (exec->interpreter()->isOpcode(it->u.opcode))
232             ++instructionCount;
233
234     printf("%lu instructions; %lu bytes at %p; %d parameter(s); %d callee register(s)\n\n",
235         static_cast<unsigned long>(instructionCount),
236         static_cast<unsigned long>(instructions.size() * sizeof(Instruction)),
237         this, numParameters, numCalleeRegisters);
238     
239     for (Vector<Instruction>::const_iterator it = begin; it != end; ++it)
240         dump(exec, begin, it);
241
242     if (identifiers.size()) {
243         printf("\nIdentifiers:\n");
244         size_t i = 0;
245         do {
246             printf("  id%u = %s\n", static_cast<unsigned>(i), identifiers[i].ascii());
247             ++i;
248         } while (i != identifiers.size());
249     }
250
251     if (constantRegisters.size()) {
252         printf("\nConstants:\n");
253         unsigned registerIndex = numVars;
254         size_t i = 0;
255         do {
256             printf("   r%u = %s\n", registerIndex, valueToSourceString(exec, constantRegisters[i].jsValue(exec)).ascii());
257             ++i;
258             ++registerIndex;
259         } while (i < constantRegisters.size());
260     }
261
262     if (unexpectedConstants.size()) {
263         printf("\nUnexpected Constants:\n");
264         size_t i = 0;
265         do {
266             printf("  k%u = %s\n", static_cast<unsigned>(i), valueToSourceString(exec, unexpectedConstants[i]).ascii());
267             ++i;
268         } while (i < unexpectedConstants.size());
269     }
270     
271     if (regexps.size()) {
272         printf("\nRegExps:\n");
273         size_t i = 0;
274         do {
275             printf("  re%u = %s\n", static_cast<unsigned>(i), regexpToSourceString(regexps[i].get()).ascii());
276             ++i;
277         } while (i < regexps.size());
278     }
279
280     if (globalResolveInstructions.size() || propertyAccessInstructions.size())
281         printf("\nStructures:\n");
282
283     if (globalResolveInstructions.size()) {
284         size_t i = 0;
285         do {
286              printStructures(&instructions[globalResolveInstructions[i]]);
287              ++i;
288         } while (i < globalResolveInstructions.size());
289     }
290     if (propertyAccessInstructions.size()) {
291         size_t i = 0;
292         do {
293              printStructures(&instructions[propertyAccessInstructions[i].bytecodeIndex]);
294              ++i;
295         } while (i < propertyAccessInstructions.size());
296     }
297  
298     if (exceptionHandlers.size()) {
299         printf("\nException Handlers:\n");
300         unsigned i = 0;
301         do {
302             printf("\t %d: { start: [%4d] end: [%4d] target: [%4d] }\n", i + 1, exceptionHandlers[i].start, exceptionHandlers[i].end, exceptionHandlers[i].target);
303             ++i;
304         } while (i < exceptionHandlers.size());
305     }
306     
307     if (immediateSwitchJumpTables.size()) {
308         printf("Immediate Switch Jump Tables:\n");
309         unsigned i = 0;
310         do {
311             printf("  %1d = {\n", i);
312             int entry = 0;
313             Vector<int32_t>::const_iterator end = immediateSwitchJumpTables[i].branchOffsets.end();
314             for (Vector<int32_t>::const_iterator iter = immediateSwitchJumpTables[i].branchOffsets.begin(); iter != end; ++iter, ++entry) {
315                 if (!*iter)
316                     continue;
317                 printf("\t\t%4d => %04d\n", entry + immediateSwitchJumpTables[i].min, *iter);
318             }
319             printf("      }\n");
320             ++i;
321         } while (i < immediateSwitchJumpTables.size());
322     }
323     
324     if (characterSwitchJumpTables.size()) {
325         printf("\nCharacter Switch Jump Tables:\n");
326         unsigned i = 0;
327         do {
328             printf("  %1d = {\n", i);
329             int entry = 0;
330             Vector<int32_t>::const_iterator end = characterSwitchJumpTables[i].branchOffsets.end();
331             for (Vector<int32_t>::const_iterator iter = characterSwitchJumpTables[i].branchOffsets.begin(); iter != end; ++iter, ++entry) {
332                 if (!*iter)
333                     continue;
334                 ASSERT(!((i + characterSwitchJumpTables[i].min) & ~0xFFFF));
335                 UChar ch = static_cast<UChar>(entry + characterSwitchJumpTables[i].min);
336                 printf("\t\t\"%s\" => %04d\n", UString(&ch, 1).ascii(), *iter);
337         }
338             printf("      }\n");
339             ++i;
340         } while (i < characterSwitchJumpTables.size());
341     }
342     
343     if (stringSwitchJumpTables.size()) {
344         printf("\nString Switch Jump Tables:\n");
345         unsigned i = 0;
346         do {
347             printf("  %1d = {\n", i);
348             StringJumpTable::StringOffsetTable::const_iterator end = stringSwitchJumpTables[i].offsetTable.end();
349             for (StringJumpTable::StringOffsetTable::const_iterator iter = stringSwitchJumpTables[i].offsetTable.begin(); iter != end; ++iter)
350                 printf("\t\t\"%s\" => %04d\n", UString(iter->first).ascii(), iter->second.branchOffset);
351             printf("      }\n");
352             ++i;
353         } while (i < stringSwitchJumpTables.size());
354     }
355
356     printf("\n");
357 }
358
359 void CodeBlock::dump(ExecState* exec, const Vector<Instruction>::const_iterator& begin, Vector<Instruction>::const_iterator& it) const
360 {
361     int location = it - begin;
362     switch (exec->interpreter()->getOpcodeID(it->u.opcode)) {
363         case op_enter: {
364             printf("[%4d] enter\n", location);
365             break;
366         }
367         case op_enter_with_activation: {
368             int r0 = (++it)->u.operand;
369             printf("[%4d] enter_with_activation %s\n", location, registerName(r0).c_str());
370             break;
371         }
372         case op_create_arguments: {
373             printf("[%4d] create_arguments\n", location);
374             break;
375         }
376         case op_convert_this: {
377             int r0 = (++it)->u.operand;
378             printf("[%4d] convert_this %s\n", location, registerName(r0).c_str());
379             break;
380         }
381         case op_unexpected_load: {
382             int r0 = (++it)->u.operand;
383             int k0 = (++it)->u.operand;
384             printf("[%4d] unexpected_load\t %s, %s\n", location, registerName(r0).c_str(), constantName(exec, k0, unexpectedConstants[k0]).c_str());
385             break;
386         }
387         case op_new_object: {
388             int r0 = (++it)->u.operand;
389             printf("[%4d] new_object\t %s\n", location, registerName(r0).c_str());
390             break;
391         }
392         case op_new_array: {
393             int dst = (++it)->u.operand;
394             int argv = (++it)->u.operand;
395             int argc = (++it)->u.operand;
396             printf("[%4d] new_array\t %s, %s, %d\n", location, registerName(dst).c_str(), registerName(argv).c_str(), argc);
397             break;
398         }
399         case op_new_regexp: {
400             int r0 = (++it)->u.operand;
401             int re0 = (++it)->u.operand;
402             printf("[%4d] new_regexp\t %s, %s\n", location, registerName(r0).c_str(), regexpName(re0, regexps[re0].get()).c_str());
403             break;
404         }
405         case op_mov: {
406             int r0 = (++it)->u.operand;
407             int r1 = (++it)->u.operand;
408             printf("[%4d] mov\t\t %s, %s\n", location, registerName(r0).c_str(), registerName(r1).c_str());
409             break;
410         }
411         case op_not: {
412             printUnaryOp(location, it, "not");
413             break;
414         }
415         case op_eq: {
416             printBinaryOp(location, it, "eq");
417             break;
418         }
419         case op_eq_null: {
420             printUnaryOp(location, it, "eq_null");
421             break;
422         }
423         case op_neq: {
424             printBinaryOp(location, it, "neq");
425             break;
426         }
427         case op_neq_null: {
428             printUnaryOp(location, it, "neq_null");
429             break;
430         }
431         case op_stricteq: {
432             printBinaryOp(location, it, "stricteq");
433             break;
434         }
435         case op_nstricteq: {
436             printBinaryOp(location, it, "nstricteq");
437             break;
438         }
439         case op_less: {
440             printBinaryOp(location, it, "less");
441             break;
442         }
443         case op_lesseq: {
444             printBinaryOp(location, it, "lesseq");
445             break;
446         }
447         case op_pre_inc: {
448             int r0 = (++it)->u.operand;
449             printf("[%4d] pre_inc\t\t %s\n", location, registerName(r0).c_str());
450             break;
451         }
452         case op_pre_dec: {
453             int r0 = (++it)->u.operand;
454             printf("[%4d] pre_dec\t\t %s\n", location, registerName(r0).c_str());
455             break;
456         }
457         case op_post_inc: {
458             printUnaryOp(location, it, "post_inc");
459             break;
460         }
461         case op_post_dec: {
462             printUnaryOp(location, it, "post_dec");
463             break;
464         }
465         case op_to_jsnumber: {
466             printUnaryOp(location, it, "to_jsnumber");
467             break;
468         }
469         case op_negate: {
470             printUnaryOp(location, it, "negate");
471             break;
472         }
473         case op_add: {
474             printBinaryOp(location, it, "add");
475             ++it;
476             break;
477         }
478         case op_mul: {
479             printBinaryOp(location, it, "mul");
480             ++it;
481             break;
482         }
483         case op_div: {
484             printBinaryOp(location, it, "div");
485             break;
486         }
487         case op_mod: {
488             printBinaryOp(location, it, "mod");
489             break;
490         }
491         case op_sub: {
492             printBinaryOp(location, it, "sub");
493             ++it;
494             break;
495         }
496         case op_lshift: {
497             printBinaryOp(location, it, "lshift");
498             break;            
499         }
500         case op_rshift: {
501             printBinaryOp(location, it, "rshift");
502             break;
503         }
504         case op_urshift: {
505             printBinaryOp(location, it, "urshift");
506             break;
507         }
508         case op_bitand: {
509             printBinaryOp(location, it, "bitand");
510             ++it;
511             break;
512         }
513         case op_bitxor: {
514             printBinaryOp(location, it, "bitxor");
515             ++it;
516             break;
517         }
518         case op_bitor: {
519             printBinaryOp(location, it, "bitor");
520             ++it;
521             break;
522         }
523         case op_bitnot: {
524             printUnaryOp(location, it, "bitnot");
525             break;
526         }
527         case op_instanceof: {
528             int r0 = (++it)->u.operand;
529             int r1 = (++it)->u.operand;
530             int r2 = (++it)->u.operand;
531             int r3 = (++it)->u.operand;
532             printf("[%4d] instanceof\t\t %s, %s, %s, %s\n", location, registerName(r0).c_str(), registerName(r1).c_str(), registerName(r2).c_str(), registerName(r3).c_str());
533             break;
534         }
535         case op_typeof: {
536             printUnaryOp(location, it, "typeof");
537             break;
538         }
539         case op_is_undefined: {
540             printUnaryOp(location, it, "is_undefined");
541             break;
542         }
543         case op_is_boolean: {
544             printUnaryOp(location, it, "is_boolean");
545             break;
546         }
547         case op_is_number: {
548             printUnaryOp(location, it, "is_number");
549             break;
550         }
551         case op_is_string: {
552             printUnaryOp(location, it, "is_string");
553             break;
554         }
555         case op_is_object: {
556             printUnaryOp(location, it, "is_object");
557             break;
558         }
559         case op_is_function: {
560             printUnaryOp(location, it, "is_function");
561             break;
562         }
563         case op_in: {
564             printBinaryOp(location, it, "in");
565             break;
566         }
567         case op_resolve: {
568             int r0 = (++it)->u.operand;
569             int id0 = (++it)->u.operand;
570             printf("[%4d] resolve\t\t %s, %s\n", location, registerName(r0).c_str(), idName(id0, identifiers[id0]).c_str());
571             break;
572         }
573         case op_resolve_skip: {
574             int r0 = (++it)->u.operand;
575             int id0 = (++it)->u.operand;
576             int skipLevels = (++it)->u.operand;
577             printf("[%4d] resolve_skip\t %s, %s, %d\n", location, registerName(r0).c_str(), idName(id0, identifiers[id0]).c_str(), skipLevels);
578             break;
579         }
580         case op_resolve_global: {
581             int r0 = (++it)->u.operand;
582             JSValue* scope = static_cast<JSValue*>((++it)->u.jsCell);
583             int id0 = (++it)->u.operand;
584             printf("[%4d] resolve_global\t %s, %s, %s\n", location, registerName(r0).c_str(), valueToSourceString(exec, scope).ascii(), idName(id0, identifiers[id0]).c_str());
585             it += 2;
586             break;
587         }
588         case op_get_scoped_var: {
589             int r0 = (++it)->u.operand;
590             int index = (++it)->u.operand;
591             int skipLevels = (++it)->u.operand;
592             printf("[%4d] get_scoped_var\t %s, %d, %d\n", location, registerName(r0).c_str(), index, skipLevels);
593             break;
594         }
595         case op_put_scoped_var: {
596             int index = (++it)->u.operand;
597             int skipLevels = (++it)->u.operand;
598             int r0 = (++it)->u.operand;
599             printf("[%4d] put_scoped_var\t %d, %d, %s\n", location, index, skipLevels, registerName(r0).c_str());
600             break;
601         }
602         case op_get_global_var: {
603             int r0 = (++it)->u.operand;
604             JSValue* scope = static_cast<JSValue*>((++it)->u.jsCell);
605             int index = (++it)->u.operand;
606             printf("[%4d] get_global_var\t %s, %s, %d\n", location, registerName(r0).c_str(), valueToSourceString(exec, scope).ascii(), index);
607             break;
608         }
609         case op_put_global_var: {
610             JSValue* scope = static_cast<JSValue*>((++it)->u.jsCell);
611             int index = (++it)->u.operand;
612             int r0 = (++it)->u.operand;
613             printf("[%4d] put_global_var\t %s, %d, %s\n", location, valueToSourceString(exec, scope).ascii(), index, registerName(r0).c_str());
614             break;
615         }
616         case op_resolve_base: {
617             int r0 = (++it)->u.operand;
618             int id0 = (++it)->u.operand;
619             printf("[%4d] resolve_base\t %s, %s\n", location, registerName(r0).c_str(), idName(id0, identifiers[id0]).c_str());
620             break;
621         }
622         case op_resolve_with_base: {
623             int r0 = (++it)->u.operand;
624             int r1 = (++it)->u.operand;
625             int id0 = (++it)->u.operand;
626             printf("[%4d] resolve_with_base %s, %s, %s\n", location, registerName(r0).c_str(), registerName(r1).c_str(), idName(id0, identifiers[id0]).c_str());
627             break;
628         }
629         case op_resolve_func: {
630             int r0 = (++it)->u.operand;
631             int r1 = (++it)->u.operand;
632             int id0 = (++it)->u.operand;
633             printf("[%4d] resolve_func\t %s, %s, %s\n", location, registerName(r0).c_str(), registerName(r1).c_str(), idName(id0, identifiers[id0]).c_str());
634             break;
635         }
636         case op_get_by_id: {
637             printGetByIdOp(location, it, identifiers, "get_by_id");
638             break;
639         }
640         case op_get_by_id_self: {
641             printGetByIdOp(location, it, identifiers, "get_by_id_self");
642             break;
643         }
644         case op_get_by_id_self_list: {
645             printGetByIdOp(location, it, identifiers, "get_by_id_self_list");
646             break;
647         }
648         case op_get_by_id_proto: {
649             printGetByIdOp(location, it, identifiers, "get_by_id_proto");
650             break;
651         }
652         case op_get_by_id_proto_list: {
653             printGetByIdOp(location, it, identifiers, "op_get_by_id_proto_list");
654             break;
655         }
656         case op_get_by_id_chain: {
657             printGetByIdOp(location, it, identifiers, "get_by_id_chain");
658             break;
659         }
660         case op_get_by_id_generic: {
661             printGetByIdOp(location, it, identifiers, "get_by_id_generic");
662             break;
663         }
664         case op_get_array_length: {
665             printGetByIdOp(location, it, identifiers, "get_array_length");
666             break;
667         }
668         case op_get_string_length: {
669             printGetByIdOp(location, it, identifiers, "get_string_length");
670             break;
671         }
672         case op_put_by_id: {
673             printPutByIdOp(location, it, identifiers, "put_by_id");
674             break;
675         }
676         case op_put_by_id_replace: {
677             printPutByIdOp(location, it, identifiers, "put_by_id_replace");
678             break;
679         }
680         case op_put_by_id_transition: {
681             printPutByIdOp(location, it, identifiers, "put_by_id_transition");
682             break;
683         }
684         case op_put_by_id_generic: {
685             printPutByIdOp(location, it, identifiers, "put_by_id_generic");
686             break;
687         }
688         case op_put_getter: {
689             int r0 = (++it)->u.operand;
690             int id0 = (++it)->u.operand;
691             int r1 = (++it)->u.operand;
692             printf("[%4d] put_getter\t %s, %s, %s\n", location, registerName(r0).c_str(), idName(id0, identifiers[id0]).c_str(), registerName(r1).c_str());
693             break;
694         }
695         case op_put_setter: {
696             int r0 = (++it)->u.operand;
697             int id0 = (++it)->u.operand;
698             int r1 = (++it)->u.operand;
699             printf("[%4d] put_setter\t %s, %s, %s\n", location, registerName(r0).c_str(), idName(id0, identifiers[id0]).c_str(), registerName(r1).c_str());
700             break;
701         }
702         case op_del_by_id: {
703             int r0 = (++it)->u.operand;
704             int r1 = (++it)->u.operand;
705             int id0 = (++it)->u.operand;
706             printf("[%4d] del_by_id\t %s, %s, %s\n", location, registerName(r0).c_str(), registerName(r1).c_str(), idName(id0, identifiers[id0]).c_str());
707             break;
708         }
709         case op_get_by_val: {
710             int r0 = (++it)->u.operand;
711             int r1 = (++it)->u.operand;
712             int r2 = (++it)->u.operand;
713             printf("[%4d] get_by_val\t %s, %s, %s\n", location, registerName(r0).c_str(), registerName(r1).c_str(), registerName(r2).c_str());
714             break;
715         }
716         case op_put_by_val: {
717             int r0 = (++it)->u.operand;
718             int r1 = (++it)->u.operand;
719             int r2 = (++it)->u.operand;
720             printf("[%4d] put_by_val\t %s, %s, %s\n", location, registerName(r0).c_str(), registerName(r1).c_str(), registerName(r2).c_str());
721             break;
722         }
723         case op_del_by_val: {
724             int r0 = (++it)->u.operand;
725             int r1 = (++it)->u.operand;
726             int r2 = (++it)->u.operand;
727             printf("[%4d] del_by_val\t %s, %s, %s\n", location, registerName(r0).c_str(), registerName(r1).c_str(), registerName(r2).c_str());
728             break;
729         }
730         case op_put_by_index: {
731             int r0 = (++it)->u.operand;
732             unsigned n0 = (++it)->u.operand;
733             int r1 = (++it)->u.operand;
734             printf("[%4d] put_by_index\t %s, %u, %s\n", location, registerName(r0).c_str(), n0, registerName(r1).c_str());
735             break;
736         }
737         case op_jmp: {
738             int offset = (++it)->u.operand;
739             printf("[%4d] jmp\t\t %d(->%d)\n", location, offset, jumpTarget(begin, it, offset));
740             break;
741         }
742         case op_loop: {
743             int offset = (++it)->u.operand;
744             printf("[%4d] loop\t\t %d(->%d)\n", location, offset, jumpTarget(begin, it, offset));
745             break;
746         }
747         case op_jtrue: {
748             printConditionalJump(begin, it, location, "jtrue");
749             break;
750         }
751         case op_loop_if_true: {
752             printConditionalJump(begin, it, location, "loop_if_true");
753             break;
754         }
755         case op_jfalse: {
756             printConditionalJump(begin, it, location, "jfalse");
757             break;
758         }
759         case op_jeq_null: {
760             printConditionalJump(begin, it, location, "jeq_null");
761             break;
762         }
763         case op_jneq_null: {
764             printConditionalJump(begin, it, location, "jneq_null");
765             break;
766         }
767         case op_jnless: {
768             int r0 = (++it)->u.operand;
769             int r1 = (++it)->u.operand;
770             int offset = (++it)->u.operand;
771             printf("[%4d] jnless\t\t %s, %s, %d(->%d)\n", location, registerName(r0).c_str(), registerName(r1).c_str(), offset, jumpTarget(begin, it, offset));
772             break;
773         }
774         case op_loop_if_less: {
775             int r0 = (++it)->u.operand;
776             int r1 = (++it)->u.operand;
777             int offset = (++it)->u.operand;
778             printf("[%4d] loop_if_less\t %s, %s, %d(->%d)\n", location, registerName(r0).c_str(), registerName(r1).c_str(), offset, jumpTarget(begin, it, offset));
779             break;
780         }
781         case op_loop_if_lesseq: {
782             int r0 = (++it)->u.operand;
783             int r1 = (++it)->u.operand;
784             int offset = (++it)->u.operand;
785             printf("[%4d] loop_if_lesseq\t %s, %s, %d(->%d)\n", location, registerName(r0).c_str(), registerName(r1).c_str(), offset, jumpTarget(begin, it, offset));
786             break;
787         }
788         case op_switch_imm: {
789             int tableIndex = (++it)->u.operand;
790             int defaultTarget = (++it)->u.operand;
791             int scrutineeRegister = (++it)->u.operand;
792             printf("[%4d] switch_imm\t %d, %d(->%d), %s\n", location, tableIndex, defaultTarget, jumpTarget(begin, it, defaultTarget), registerName(scrutineeRegister).c_str());
793             break;
794         }
795         case op_switch_char: {
796             int tableIndex = (++it)->u.operand;
797             int defaultTarget = (++it)->u.operand;
798             int scrutineeRegister = (++it)->u.operand;
799             printf("[%4d] switch_char\t %d, %d(->%d), %s\n", location, tableIndex, defaultTarget, jumpTarget(begin, it, defaultTarget), registerName(scrutineeRegister).c_str());
800             break;
801         }
802         case op_switch_string: {
803             int tableIndex = (++it)->u.operand;
804             int defaultTarget = (++it)->u.operand;
805             int scrutineeRegister = (++it)->u.operand;
806             printf("[%4d] switch_string\t %d, %d(->%d), %s\n", location, tableIndex, defaultTarget, jumpTarget(begin, it, defaultTarget), registerName(scrutineeRegister).c_str());
807             break;
808         }
809         case op_new_func: {
810             int r0 = (++it)->u.operand;
811             int f0 = (++it)->u.operand;
812             printf("[%4d] new_func\t\t %s, f%d\n", location, registerName(r0).c_str(), f0);
813             break;
814         }
815         case op_new_func_exp: {
816             int r0 = (++it)->u.operand;
817             int f0 = (++it)->u.operand;
818             printf("[%4d] new_func_exp\t %s, f%d\n", location, registerName(r0).c_str(), f0);
819             break;
820         }
821         case op_call: {
822             int dst = (++it)->u.operand;
823             int func = (++it)->u.operand;
824             int argCount = (++it)->u.operand;
825             int registerOffset = (++it)->u.operand;
826             printf("[%4d] call\t\t %s, %s, %d, %d\n", location, registerName(dst).c_str(), registerName(func).c_str(), argCount, registerOffset);
827             break;
828         }
829         case op_call_eval: {
830             int dst = (++it)->u.operand;
831             int func = (++it)->u.operand;
832             int argCount = (++it)->u.operand;
833             int registerOffset = (++it)->u.operand;
834             printf("[%4d] call_eval\t %s, %s, %d, %d\n", location, registerName(dst).c_str(), registerName(func).c_str(), argCount, registerOffset);
835             break;
836         }
837         case op_tear_off_activation: {
838             int r0 = (++it)->u.operand;
839             printf("[%4d] tear_off_activation\t %s\n", location, registerName(r0).c_str());
840             break;
841         }
842         case op_tear_off_arguments: {
843             printf("[%4d] tear_off_arguments\n", location);
844             break;
845         }
846         case op_ret: {
847             int r0 = (++it)->u.operand;
848             printf("[%4d] ret\t\t %s\n", location, registerName(r0).c_str());
849             break;
850         }
851         case op_construct: {
852             int dst = (++it)->u.operand;
853             int func = (++it)->u.operand;
854             int argCount = (++it)->u.operand;
855             int registerOffset = (++it)->u.operand;
856             int proto = (++it)->u.operand;
857             int thisRegister = (++it)->u.operand;
858             printf("[%4d] construct\t %s, %s, %d, %d, %s, %s\n", location, registerName(dst).c_str(), registerName(func).c_str(), argCount, registerOffset, registerName(proto).c_str(), registerName(thisRegister).c_str());
859             break;
860         }
861         case op_construct_verify: {
862             int r0 = (++it)->u.operand;
863             int r1 = (++it)->u.operand;
864             printf("[%4d] construct_verify\t %s, %s\n", location, registerName(r0).c_str(), registerName(r1).c_str());
865             break;
866         }
867         case op_get_pnames: {
868             int r0 = (++it)->u.operand;
869             int r1 = (++it)->u.operand;
870             printf("[%4d] get_pnames\t %s, %s\n", location, registerName(r0).c_str(), registerName(r1).c_str());
871             break;
872         }
873         case op_next_pname: {
874             int dest = (++it)->u.operand;
875             int iter = (++it)->u.operand;
876             int offset = (++it)->u.operand;
877             printf("[%4d] next_pname\t %s, %s, %d(->%d)\n", location, registerName(dest).c_str(), registerName(iter).c_str(), offset, jumpTarget(begin, it, offset));
878             break;
879         }
880         case op_push_scope: {
881             int r0 = (++it)->u.operand;
882             printf("[%4d] push_scope\t %s\n", location, registerName(r0).c_str());
883             break;
884         }
885         case op_pop_scope: {
886             printf("[%4d] pop_scope\n", location);
887             break;
888         }
889         case op_push_new_scope: {
890             int r0 = (++it)->u.operand;
891             int id0 = (++it)->u.operand;
892             int r1 = (++it)->u.operand;
893             printf("[%4d] push_new_scope \t%s, %s, %s\n", location, registerName(r0).c_str(), idName(id0, identifiers[id0]).c_str(), registerName(r1).c_str());
894             break;
895         }
896         case op_jmp_scopes: {
897             int scopeDelta = (++it)->u.operand;
898             int offset = (++it)->u.operand;
899             printf("[%4d] jmp_scopes\t^%d, %d(->%d)\n", location, scopeDelta, offset, jumpTarget(begin, it, offset));
900             break;
901         }
902         case op_catch: {
903             int r0 = (++it)->u.operand;
904             printf("[%4d] catch\t\t %s\n", location, registerName(r0).c_str());
905             break;
906         }
907         case op_throw: {
908             int r0 = (++it)->u.operand;
909             printf("[%4d] throw\t\t %s\n", location, registerName(r0).c_str());
910             break;
911         }
912         case op_new_error: {
913             int r0 = (++it)->u.operand;
914             int errorType = (++it)->u.operand;
915             int k0 = (++it)->u.operand;
916             printf("[%4d] new_error\t %s, %d, %s\n", location, registerName(r0).c_str(), errorType, constantName(exec, k0, unexpectedConstants[k0]).c_str());
917             break;
918         }
919         case op_jsr: {
920             int retAddrDst = (++it)->u.operand;
921             int offset = (++it)->u.operand;
922             printf("[%4d] jsr\t\t %s, %d(->%d)\n", location, registerName(retAddrDst).c_str(), offset, jumpTarget(begin, it, offset));
923             break;
924         }
925         case op_sret: {
926             int retAddrSrc = (++it)->u.operand;
927             printf("[%4d] sret\t\t %s\n", location, registerName(retAddrSrc).c_str());
928             break;
929         }
930         case op_debug: {
931             int debugHookID = (++it)->u.operand;
932             int firstLine = (++it)->u.operand;
933             int lastLine = (++it)->u.operand;
934             printf("[%4d] debug\t\t %s, %d, %d\n", location, debugHookName(debugHookID), firstLine, lastLine);
935             break;
936         }
937         case op_profile_will_call: {
938             int function = (++it)->u.operand;
939             printf("[%4d] profile_will_call %s\n", location, registerName(function).c_str());
940             break;
941         }
942         case op_profile_did_call: {
943             int function = (++it)->u.operand;
944             printf("[%4d] profile_did_call\t %s\n", location, registerName(function).c_str());
945             break;
946         }
947         case op_end: {
948             int r0 = (++it)->u.operand;
949             printf("[%4d] end\t\t %s\n", location, registerName(r0).c_str());
950             break;
951         }
952     }
953 }
954
955 #endif // !defined(NDEBUG) || ENABLE(OPCODE_SAMPLING)
956
957 CodeBlock::~CodeBlock()
958 {
959     for (size_t size = globalResolveInstructions.size(), i = 0; i < size; ++i) {
960         derefStructures(&instructions[globalResolveInstructions[i]]);
961     }
962
963     for (size_t size = propertyAccessInstructions.size(), i = 0; i < size; ++i) {
964         derefStructures(&instructions[propertyAccessInstructions[i].bytecodeIndex]);
965         if (propertyAccessInstructions[i].stubRoutine)
966             WTF::fastFreeExecutable(propertyAccessInstructions[i].stubRoutine);
967     }
968
969     for (size_t size = callLinkInfos.size(), i = 0; i < size; ++i) {
970         CallLinkInfo* callLinkInfo = &callLinkInfos[i];
971         if (callLinkInfo->isLinked())
972             callLinkInfo->callee->removeCaller(callLinkInfo);
973     }
974
975 #if ENABLE(JIT) 
976     unlinkCallers();
977
978     if (ctiCode)
979         WTF::fastFreeExecutable(ctiCode);
980 #endif
981 }
982
983 #if ENABLE(JIT) 
984 void CodeBlock::unlinkCallers()
985 {
986     size_t size = linkedCallerList.size();
987     for (size_t i = 0; i < size; ++i) {
988         CallLinkInfo* currentCaller = linkedCallerList[i];
989         JIT::unlinkCall(currentCaller);
990         currentCaller->setUnlinked();
991     }
992     linkedCallerList.clear();
993 }
994 #endif
995
996 void CodeBlock::derefStructures(Instruction* vPC) const
997 {
998     Interpreter* interpreter = globalData->interpreter;
999
1000     if (vPC[0].u.opcode == interpreter->getOpcode(op_get_by_id_self)) {
1001         vPC[4].u.structure->deref();
1002         return;
1003     }
1004     if (vPC[0].u.opcode == interpreter->getOpcode(op_get_by_id_proto)) {
1005         vPC[4].u.structure->deref();
1006         vPC[5].u.structure->deref();
1007         return;
1008     }
1009     if (vPC[0].u.opcode == interpreter->getOpcode(op_get_by_id_chain)) {
1010         vPC[4].u.structure->deref();
1011         vPC[5].u.structureChain->deref();
1012         return;
1013     }
1014     if (vPC[0].u.opcode == interpreter->getOpcode(op_put_by_id_transition)) {
1015         vPC[4].u.structure->deref();
1016         vPC[5].u.structure->deref();
1017         vPC[6].u.structureChain->deref();
1018         return;
1019     }
1020     if (vPC[0].u.opcode == interpreter->getOpcode(op_put_by_id_replace)) {
1021         vPC[4].u.structure->deref();
1022         return;
1023     }
1024     if (vPC[0].u.opcode == interpreter->getOpcode(op_resolve_global)) {
1025         if(vPC[4].u.structure)
1026             vPC[4].u.structure->deref();
1027         return;
1028     }
1029     if ((vPC[0].u.opcode == interpreter->getOpcode(op_get_by_id_proto_list))
1030         || (vPC[0].u.opcode == interpreter->getOpcode(op_get_by_id_self_list))) {
1031         PolymorphicAccessStructureList* polymorphicStructures = vPC[4].u.polymorphicStructures;
1032         polymorphicStructures->derefStructures(vPC[5].u.operand);
1033         delete polymorphicStructures;
1034         return;
1035     }
1036
1037     // These instructions don't ref their Structures.
1038     ASSERT(vPC[0].u.opcode == interpreter->getOpcode(op_get_by_id) || vPC[0].u.opcode == interpreter->getOpcode(op_put_by_id) || vPC[0].u.opcode == interpreter->getOpcode(op_get_by_id_generic) || vPC[0].u.opcode == interpreter->getOpcode(op_put_by_id_generic) || vPC[0].u.opcode == interpreter->getOpcode(op_get_array_length) || vPC[0].u.opcode == interpreter->getOpcode(op_get_string_length));
1039 }
1040
1041 void CodeBlock::refStructures(Instruction* vPC) const
1042 {
1043     Interpreter* interpreter = globalData->interpreter;
1044
1045     if (vPC[0].u.opcode == interpreter->getOpcode(op_get_by_id_self)) {
1046         vPC[4].u.structure->ref();
1047         return;
1048     }
1049     if (vPC[0].u.opcode == interpreter->getOpcode(op_get_by_id_proto)) {
1050         vPC[4].u.structure->ref();
1051         vPC[5].u.structure->ref();
1052         return;
1053     }
1054     if (vPC[0].u.opcode == interpreter->getOpcode(op_get_by_id_chain)) {
1055         vPC[4].u.structure->ref();
1056         vPC[5].u.structureChain->ref();
1057         return;
1058     }
1059     if (vPC[0].u.opcode == interpreter->getOpcode(op_put_by_id_transition)) {
1060         vPC[4].u.structure->ref();
1061         vPC[5].u.structure->ref();
1062         vPC[6].u.structureChain->ref();
1063         return;
1064     }
1065     if (vPC[0].u.opcode == interpreter->getOpcode(op_put_by_id_replace)) {
1066         vPC[4].u.structure->ref();
1067         return;
1068     }
1069     
1070     // These instructions don't ref their Structures.
1071     ASSERT(vPC[0].u.opcode == interpreter->getOpcode(op_get_by_id) || vPC[0].u.opcode == interpreter->getOpcode(op_put_by_id) || vPC[0].u.opcode == interpreter->getOpcode(op_get_by_id_generic) || vPC[0].u.opcode == interpreter->getOpcode(op_put_by_id_generic));
1072 }
1073
1074 void CodeBlock::mark()
1075 {
1076     for (size_t i = 0; i < constantRegisters.size(); ++i)
1077         if (!constantRegisters[i].marked())
1078             constantRegisters[i].mark();
1079
1080     for (size_t i = 0; i < unexpectedConstants.size(); ++i)
1081         if (!unexpectedConstants[i]->marked())
1082             unexpectedConstants[i]->mark();
1083
1084     for (size_t i = 0; i < functions.size(); ++i)
1085         functions[i]->body()->mark();
1086
1087     for (size_t i = 0; i < functionExpressions.size(); ++i)
1088         functionExpressions[i]->body()->mark();
1089 }
1090
1091 bool CodeBlock::getHandlerForVPC(const Instruction* vPC, Instruction*& target, int& scopeDepth)
1092 {
1093     Vector<HandlerInfo>::iterator ptr = exceptionHandlers.begin(); 
1094     Vector<HandlerInfo>::iterator end = exceptionHandlers.end();
1095     unsigned addressOffset = vPC - instructions.begin();
1096     ASSERT(addressOffset < instructions.size());
1097     
1098     for (; ptr != end; ++ptr) {
1099         // Handlers are ordered innermost first, so the first handler we encounter
1100         // that contains the source address is the correct handler to use.
1101         if (ptr->start <= addressOffset && ptr->end >= addressOffset) {
1102             scopeDepth = ptr->scopeDepth;
1103             target = instructions.begin() + ptr->target;
1104             return true;
1105         }
1106     }
1107     return false;
1108 }
1109
1110 void* CodeBlock::nativeExceptionCodeForHandlerVPC(const Instruction* handlerVPC)
1111 {
1112     Vector<HandlerInfo>::iterator ptr = exceptionHandlers.begin(); 
1113     Vector<HandlerInfo>::iterator end = exceptionHandlers.end();
1114     
1115     for (; ptr != end; ++ptr) {
1116         Instruction*target = instructions.begin() + ptr->target;
1117         if (handlerVPC == target)
1118             return ptr->nativeCode;
1119     }
1120
1121     return 0;
1122 }
1123
1124 int CodeBlock::lineNumberForVPC(const Instruction* vPC)
1125 {
1126     unsigned instructionOffset = vPC - instructions.begin();
1127     ASSERT(instructionOffset < instructions.size());
1128
1129     if (!lineInfo.size())
1130         return ownerNode->source().firstLine(); // Empty function
1131
1132     int low = 0;
1133     int high = lineInfo.size();
1134     while (low < high) {
1135         int mid = low + (high - low) / 2;
1136         if (lineInfo[mid].instructionOffset <= instructionOffset)
1137             low = mid + 1;
1138         else
1139             high = mid;
1140     }
1141     
1142     if (!low)
1143         return ownerNode->source().firstLine();
1144     return lineInfo[low - 1].lineNumber;
1145 }
1146
1147 int CodeBlock::expressionRangeForVPC(const Instruction* vPC, int& divot, int& startOffset, int& endOffset)
1148 {
1149     unsigned instructionOffset = vPC - instructions.begin();
1150     ASSERT(instructionOffset < instructions.size());
1151
1152     if (!expressionInfo.size()) {
1153         // We didn't think anything could throw.  Apparently we were wrong.
1154         startOffset = 0;
1155         endOffset = 0;
1156         divot = 0;
1157         return lineNumberForVPC(vPC);
1158     }
1159
1160     int low = 0;
1161     int high = expressionInfo.size();
1162     while (low < high) {
1163         int mid = low + (high - low) / 2;
1164         if (expressionInfo[mid].instructionOffset <= instructionOffset)
1165             low = mid + 1;
1166         else
1167             high = mid;
1168     }
1169     
1170     ASSERT(low);
1171     if (!low) {
1172         startOffset = 0;
1173         endOffset = 0;
1174         divot = 0;
1175         return lineNumberForVPC(vPC);
1176     }
1177
1178     startOffset = expressionInfo[low - 1].startOffset;
1179     endOffset = expressionInfo[low - 1].endOffset;
1180     divot = expressionInfo[low - 1].divotPoint + sourceOffset;
1181     return lineNumberForVPC(vPC);
1182 }
1183
1184 int32_t SimpleJumpTable::offsetForValue(int32_t value, int32_t defaultOffset)
1185 {
1186     if (value >= min && static_cast<uint32_t>(value - min) < branchOffsets.size()) {
1187         int32_t offset = branchOffsets[value - min];
1188         if (offset)
1189             return offset;
1190     }
1191     return defaultOffset;        
1192 }
1193
1194 } // namespace JSC