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[apple/javascriptcore.git] / jit / JITCall32_64.cpp
1 /*
2 * Copyright (C) 2008, 2013-2015 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. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27
28 #if ENABLE(JIT)
29 #if USE(JSVALUE32_64)
30 #include "JIT.h"
31
32 #include "CodeBlock.h"
33 #include "Interpreter.h"
34 #include "JITInlines.h"
35 #include "JSArray.h"
36 #include "JSFunction.h"
37 #include "JSCInlines.h"
38 #include "LinkBuffer.h"
39 #include "RepatchBuffer.h"
40 #include "ResultType.h"
41 #include "SamplingTool.h"
42 #include "SetupVarargsFrame.h"
43 #include "StackAlignment.h"
44 #include <wtf/StringPrintStream.h>
45
46
47 namespace JSC {
48
49 void JIT::emitPutCallResult(Instruction* instruction)
50 {
51 int dst = instruction[1].u.operand;
52 emitValueProfilingSite();
53 emitStore(dst, regT1, regT0);
54 }
55
56 void JIT::emit_op_ret(Instruction* currentInstruction)
57 {
58 unsigned dst = currentInstruction[1].u.operand;
59
60 emitLoad(dst, regT1, regT0);
61
62 checkStackPointerAlignment();
63 emitFunctionEpilogue();
64 ret();
65 }
66
67 void JIT::emitSlow_op_call(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
68 {
69 compileOpCallSlowCase(op_call, currentInstruction, iter, m_callLinkInfoIndex++);
70 }
71
72 void JIT::emitSlow_op_call_eval(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
73 {
74 compileOpCallSlowCase(op_call_eval, currentInstruction, iter, m_callLinkInfoIndex);
75 }
76
77 void JIT::emitSlow_op_call_varargs(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
78 {
79 compileOpCallSlowCase(op_call_varargs, currentInstruction, iter, m_callLinkInfoIndex++);
80 }
81
82 void JIT::emitSlow_op_construct_varargs(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
83 {
84 compileOpCallSlowCase(op_construct_varargs, currentInstruction, iter, m_callLinkInfoIndex++);
85 }
86
87 void JIT::emitSlow_op_construct(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
88 {
89 compileOpCallSlowCase(op_construct, currentInstruction, iter, m_callLinkInfoIndex++);
90 }
91
92 void JIT::emit_op_call(Instruction* currentInstruction)
93 {
94 compileOpCall(op_call, currentInstruction, m_callLinkInfoIndex++);
95 }
96
97 void JIT::emit_op_call_eval(Instruction* currentInstruction)
98 {
99 compileOpCall(op_call_eval, currentInstruction, m_callLinkInfoIndex);
100 }
101
102 void JIT::emit_op_call_varargs(Instruction* currentInstruction)
103 {
104 compileOpCall(op_call_varargs, currentInstruction, m_callLinkInfoIndex++);
105 }
106
107 void JIT::emit_op_construct_varargs(Instruction* currentInstruction)
108 {
109 compileOpCall(op_construct_varargs, currentInstruction, m_callLinkInfoIndex++);
110 }
111
112 void JIT::emit_op_construct(Instruction* currentInstruction)
113 {
114 compileOpCall(op_construct, currentInstruction, m_callLinkInfoIndex++);
115 }
116
117 void JIT::compileSetupVarargsFrame(Instruction* instruction, CallLinkInfo* info)
118 {
119 int thisValue = instruction[3].u.operand;
120 int arguments = instruction[4].u.operand;
121 int firstFreeRegister = instruction[5].u.operand;
122 int firstVarArgOffset = instruction[6].u.operand;
123
124 emitLoad(arguments, regT1, regT0);
125 callOperation(operationSizeFrameForVarargs, regT1, regT0, -firstFreeRegister, firstVarArgOffset);
126 move(TrustedImm32(-firstFreeRegister), regT1);
127 emitSetVarargsFrame(*this, returnValueGPR, false, regT1, regT1);
128 addPtr(TrustedImm32(-(sizeof(CallerFrameAndPC) + WTF::roundUpToMultipleOf(stackAlignmentBytes(), 6 * sizeof(void*)))), regT1, stackPointerRegister);
129 emitLoad(arguments, regT2, regT4);
130 callOperation(operationSetupVarargsFrame, regT1, regT2, regT4, firstVarArgOffset, regT0);
131 move(returnValueGPR, regT1);
132
133 // Profile the argument count.
134 load32(Address(regT1, JSStack::ArgumentCount * static_cast<int>(sizeof(Register)) + PayloadOffset), regT2);
135 load8(info->addressOfMaxNumArguments(), regT0);
136 Jump notBiggest = branch32(Above, regT0, regT2);
137 Jump notSaturated = branch32(BelowOrEqual, regT2, TrustedImm32(255));
138 move(TrustedImm32(255), regT2);
139 notSaturated.link(this);
140 store8(regT2, info->addressOfMaxNumArguments());
141 notBiggest.link(this);
142
143 // Initialize 'this'.
144 emitLoad(thisValue, regT2, regT0);
145 store32(regT0, Address(regT1, PayloadOffset + (CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register)))));
146 store32(regT2, Address(regT1, TagOffset + (CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register)))));
147
148 addPtr(TrustedImm32(sizeof(CallerFrameAndPC)), regT1, stackPointerRegister);
149 }
150
151 void JIT::compileCallEval(Instruction* instruction)
152 {
153 addPtr(TrustedImm32(-static_cast<ptrdiff_t>(sizeof(CallerFrameAndPC))), stackPointerRegister, regT1);
154 storePtr(callFrameRegister, Address(regT1, CallFrame::callerFrameOffset()));
155
156 addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
157
158 callOperation(operationCallEval, regT1);
159
160 addSlowCase(branch32(Equal, regT1, TrustedImm32(JSValue::EmptyValueTag)));
161
162 sampleCodeBlock(m_codeBlock);
163
164 emitPutCallResult(instruction);
165 }
166
167 void JIT::compileCallEvalSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter)
168 {
169 linkSlowCase(iter);
170
171 int registerOffset = -instruction[4].u.operand;
172
173 addPtr(TrustedImm32(registerOffset * sizeof(Register) + sizeof(CallerFrameAndPC)), callFrameRegister, stackPointerRegister);
174
175 loadPtr(Address(stackPointerRegister, sizeof(Register) * JSStack::Callee - sizeof(CallerFrameAndPC)), regT0);
176 loadPtr(Address(stackPointerRegister, sizeof(Register) * JSStack::Callee - sizeof(CallerFrameAndPC)), regT1);
177 move(TrustedImmPtr(&CallLinkInfo::dummy()), regT2);
178
179 emitLoad(JSStack::Callee, regT1, regT0);
180 emitNakedCall(m_vm->getCTIStub(virtualCallThunkGenerator).code());
181 addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
182 checkStackPointerAlignment();
183
184 sampleCodeBlock(m_codeBlock);
185
186 emitPutCallResult(instruction);
187 }
188
189 void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned callLinkInfoIndex)
190 {
191 CallLinkInfo* info = m_codeBlock->addCallLinkInfo();
192 int callee = instruction[2].u.operand;
193
194 /* Caller always:
195 - Updates callFrameRegister to callee callFrame.
196 - Initializes ArgumentCount; CallerFrame; Callee.
197
198 For a JS call:
199 - Callee initializes ReturnPC; CodeBlock.
200 - Callee restores callFrameRegister before return.
201
202 For a non-JS call:
203 - Caller initializes ReturnPC; CodeBlock.
204 - Caller restores callFrameRegister after return.
205 */
206
207 if (opcodeID == op_call_varargs || opcodeID == op_construct_varargs)
208 compileSetupVarargsFrame(instruction, info);
209 else {
210 int argCount = instruction[3].u.operand;
211 int registerOffset = -instruction[4].u.operand;
212
213 if (opcodeID == op_call && shouldEmitProfiling()) {
214 emitLoad(registerOffset + CallFrame::argumentOffsetIncludingThis(0), regT0, regT1);
215 Jump done = branch32(NotEqual, regT0, TrustedImm32(JSValue::CellTag));
216 loadPtr(Address(regT1, JSCell::structureIDOffset()), regT1);
217 storePtr(regT1, instruction[OPCODE_LENGTH(op_call) - 2].u.arrayProfile->addressOfLastSeenStructureID());
218 done.link(this);
219 }
220
221 addPtr(TrustedImm32(registerOffset * sizeof(Register) + sizeof(CallerFrameAndPC)), callFrameRegister, stackPointerRegister);
222
223 store32(TrustedImm32(argCount), Address(stackPointerRegister, JSStack::ArgumentCount * static_cast<int>(sizeof(Register)) + PayloadOffset - sizeof(CallerFrameAndPC)));
224 } // SP holds newCallFrame + sizeof(CallerFrameAndPC), with ArgumentCount initialized.
225
226 uint32_t locationBits = CallFrame::Location::encodeAsBytecodeInstruction(instruction);
227 store32(TrustedImm32(locationBits), tagFor(JSStack::ArgumentCount, callFrameRegister));
228 emitLoad(callee, regT1, regT0); // regT1, regT0 holds callee.
229
230 store32(regT0, Address(stackPointerRegister, JSStack::Callee * static_cast<int>(sizeof(Register)) + PayloadOffset - sizeof(CallerFrameAndPC)));
231 store32(regT1, Address(stackPointerRegister, JSStack::Callee * static_cast<int>(sizeof(Register)) + TagOffset - sizeof(CallerFrameAndPC)));
232
233 if (opcodeID == op_call_eval) {
234 compileCallEval(instruction);
235 return;
236 }
237
238 addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag)));
239
240 DataLabelPtr addressOfLinkedFunctionCheck;
241 Jump slowCase = branchPtrWithPatch(NotEqual, regT0, addressOfLinkedFunctionCheck, TrustedImmPtr(0));
242
243 addSlowCase(slowCase);
244
245 ASSERT(m_callCompilationInfo.size() == callLinkInfoIndex);
246 info->setUpCall(CallLinkInfo::callTypeFor(opcodeID), CodeOrigin(m_bytecodeOffset), regT0);
247 m_callCompilationInfo.append(CallCompilationInfo());
248 m_callCompilationInfo[callLinkInfoIndex].hotPathBegin = addressOfLinkedFunctionCheck;
249 m_callCompilationInfo[callLinkInfoIndex].callLinkInfo = info;
250
251 checkStackPointerAlignment();
252 m_callCompilationInfo[callLinkInfoIndex].hotPathOther = emitNakedCall();
253
254 addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
255 checkStackPointerAlignment();
256
257 sampleCodeBlock(m_codeBlock);
258 emitPutCallResult(instruction);
259 }
260
261 void JIT::compileOpCallSlowCase(OpcodeID opcodeID, Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter, unsigned callLinkInfoIndex)
262 {
263 if (opcodeID == op_call_eval) {
264 compileCallEvalSlowCase(instruction, iter);
265 return;
266 }
267
268 linkSlowCase(iter);
269 linkSlowCase(iter);
270
271 ThunkGenerator generator = linkThunkGeneratorFor(
272 (opcodeID == op_construct || opcodeID == op_construct_varargs) ? CodeForConstruct : CodeForCall,
273 RegisterPreservationNotRequired);
274
275 move(TrustedImmPtr(m_callCompilationInfo[callLinkInfoIndex].callLinkInfo), regT2);
276 m_callCompilationInfo[callLinkInfoIndex].callReturnLocation = emitNakedCall(m_vm->getCTIStub(generator).code());
277
278 addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
279 checkStackPointerAlignment();
280
281 sampleCodeBlock(m_codeBlock);
282 emitPutCallResult(instruction);
283 }
284
285 } // namespace JSC
286
287 #endif // USE(JSVALUE32_64)
288 #endif // ENABLE(JIT)
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