Mercurial > hg > truffle
annotate src/cpu/x86/vm/vtableStubs_x86_64.cpp @ 113:ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv
Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
author | coleenp |
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date | Sun, 13 Apr 2008 17:43:42 -0400 |
parents | f8236e79048a |
children | d1605aabd0a1 |
rev | line source |
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0 | 1 /* |
2 * Copyright 2003-2006 Sun Microsystems, Inc. All Rights Reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_vtableStubs_x86_64.cpp.incl" | |
27 | |
28 // machine-dependent part of VtableStubs: create VtableStub of correct size and | |
29 // initialize its code | |
30 | |
31 #define __ masm-> | |
32 | |
33 #ifndef PRODUCT | |
34 extern "C" void bad_compiled_vtable_index(JavaThread* thread, | |
35 oop receiver, | |
36 int index); | |
37 #endif | |
38 | |
39 VtableStub* VtableStubs::create_vtable_stub(int vtable_index) { | |
40 const int amd64_code_length = VtableStub::pd_code_size_limit(true); | |
41 VtableStub* s = new(amd64_code_length) VtableStub(true, vtable_index); | |
42 ResourceMark rm; | |
43 CodeBuffer cb(s->entry_point(), amd64_code_length); | |
44 MacroAssembler* masm = new MacroAssembler(&cb); | |
45 | |
46 #ifndef PRODUCT | |
47 if (CountCompiledCalls) { | |
48 __ incrementl(ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr())); | |
49 } | |
50 #endif | |
51 | |
52 // get receiver (need to skip return address on top of stack) | |
53 assert(VtableStub::receiver_location() == j_rarg0->as_VMReg(), "receiver expected in j_rarg0"); | |
54 | |
55 // Free registers (non-args) are rax, rbx | |
56 | |
57 // get receiver klass | |
58 address npe_addr = __ pc(); | |
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59 __ load_klass(rax, j_rarg0); |
0 | 60 |
61 // compute entry offset (in words) | |
62 int entry_offset = | |
63 instanceKlass::vtable_start_offset() + vtable_index * vtableEntry::size(); | |
64 | |
65 #ifndef PRODUCT | |
66 if (DebugVtables) { | |
67 Label L; | |
68 // check offset vs vtable length | |
69 __ cmpl(Address(rax, instanceKlass::vtable_length_offset() * wordSize), | |
70 vtable_index * vtableEntry::size()); | |
71 __ jcc(Assembler::greater, L); | |
72 __ movl(rbx, vtable_index); | |
73 __ call_VM(noreg, | |
74 CAST_FROM_FN_PTR(address, bad_compiled_vtable_index), j_rarg0, rbx); | |
75 __ bind(L); | |
76 } | |
77 #endif // PRODUCT | |
78 | |
79 // load methodOop and target address | |
80 const Register method = rbx; | |
81 | |
82 __ movq(method, Address(rax, | |
83 entry_offset * wordSize + | |
84 vtableEntry::method_offset_in_bytes())); | |
85 if (DebugVtables) { | |
86 Label L; | |
87 __ cmpq(method, (int)NULL); | |
88 __ jcc(Assembler::equal, L); | |
89 __ cmpq(Address(method, methodOopDesc::from_compiled_offset()), (int)NULL_WORD); | |
90 __ jcc(Assembler::notZero, L); | |
91 __ stop("Vtable entry is NULL"); | |
92 __ bind(L); | |
93 } | |
94 // rax: receiver klass | |
95 // rbx: methodOop | |
96 // rcx: receiver | |
97 address ame_addr = __ pc(); | |
98 __ jmp( Address(rbx, methodOopDesc::from_compiled_offset())); | |
99 | |
100 __ flush(); | |
101 s->set_exception_points(npe_addr, ame_addr); | |
102 return s; | |
103 } | |
104 | |
105 | |
106 VtableStub* VtableStubs::create_itable_stub(int vtable_index) { | |
107 // Note well: pd_code_size_limit is the absolute minimum we can get | |
108 // away with. If you add code here, bump the code stub size | |
109 // returned by pd_code_size_limit! | |
110 const int amd64_code_length = VtableStub::pd_code_size_limit(false); | |
111 VtableStub* s = new(amd64_code_length) VtableStub(false, vtable_index); | |
112 ResourceMark rm; | |
113 CodeBuffer cb(s->entry_point(), amd64_code_length); | |
114 MacroAssembler* masm = new MacroAssembler(&cb); | |
115 | |
116 #ifndef PRODUCT | |
117 if (CountCompiledCalls) { | |
118 __ incrementl(ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr())); | |
119 } | |
120 #endif | |
121 | |
122 // Entry arguments: | |
123 // rax: Interface | |
124 // j_rarg0: Receiver | |
125 | |
126 // Free registers (non-args) are rax (interface), rbx | |
127 | |
128 // get receiver (need to skip return address on top of stack) | |
129 | |
130 assert(VtableStub::receiver_location() == j_rarg0->as_VMReg(), "receiver expected in j_rarg0"); | |
131 // get receiver klass (also an implicit null-check) | |
132 address npe_addr = __ pc(); | |
133 | |
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134 __ load_klass(rbx, j_rarg0); |
0 | 135 |
136 // If we take a trap while this arg is on the stack we will not | |
137 // be able to walk the stack properly. This is not an issue except | |
138 // when there are mistakes in this assembly code that could generate | |
139 // a spurious fault. Ask me how I know... | |
140 | |
141 __ pushq(j_rarg1); // Most registers are in use, so save one | |
142 | |
143 // compute itable entry offset (in words) | |
144 const int base = instanceKlass::vtable_start_offset() * wordSize; | |
145 assert(vtableEntry::size() * wordSize == 8, | |
146 "adjust the scaling in the code below"); | |
147 // Get length of vtable | |
148 __ movl(j_rarg1, | |
149 Address(rbx, instanceKlass::vtable_length_offset() * wordSize)); | |
150 __ leaq(rbx, Address(rbx, j_rarg1, Address::times_8, base)); | |
151 | |
152 if (HeapWordsPerLong > 1) { | |
153 // Round up to align_object_offset boundary | |
154 __ round_to_q(rbx, BytesPerLong); | |
155 } | |
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156 Label hit, next, entry, throw_icce; |
0 | 157 |
158 __ jmpb(entry); | |
159 | |
160 __ bind(next); | |
161 __ addq(rbx, itableOffsetEntry::size() * wordSize); | |
162 | |
163 __ bind(entry); | |
164 | |
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165 // If the entry is NULL then we've reached the end of the table |
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166 // without finding the expected interface, so throw an exception |
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167 __ movq(j_rarg1, Address(rbx, itableOffsetEntry::interface_offset_in_bytes())); |
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168 __ testq(j_rarg1, j_rarg1); |
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169 __ jcc(Assembler::zero, throw_icce); |
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170 __ cmpq(rax, j_rarg1); |
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171 __ jccb(Assembler::notEqual, next); |
0 | 172 |
173 // We found a hit, move offset into j_rarg1 | |
174 __ movl(j_rarg1, Address(rbx, itableOffsetEntry::offset_offset_in_bytes())); | |
175 | |
176 // Compute itableMethodEntry | |
177 const int method_offset = | |
178 (itableMethodEntry::size() * wordSize * vtable_index) + | |
179 itableMethodEntry::method_offset_in_bytes(); | |
180 | |
181 // Get methodOop and entrypoint for compiler | |
182 | |
183 // Get klass pointer again | |
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184 __ load_klass(rax, j_rarg0); |
0 | 185 |
186 const Register method = rbx; | |
187 __ movq(method, Address(rax, j_rarg1, Address::times_1, method_offset)); | |
188 | |
189 // Restore saved register, before possible trap. | |
190 __ popq(j_rarg1); | |
191 | |
192 // method (rbx): methodOop | |
193 // j_rarg0: receiver | |
194 | |
195 | |
196 #ifdef ASSERT | |
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197 if (DebugVtables) { |
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198 Label L2; |
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199 __ cmpq(method, (int)NULL); |
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200 __ jcc(Assembler::equal, L2); |
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201 __ cmpq(Address(method, methodOopDesc::from_compiled_offset()), (int)NULL_WORD); |
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202 __ jcc(Assembler::notZero, L2); |
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203 __ stop("compiler entrypoint is null"); |
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204 __ bind(L2); |
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205 } |
0 | 206 #endif // ASSERT |
207 | |
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208 // rbx: methodOop |
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209 // j_rarg0: receiver |
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210 address ame_addr = __ pc(); |
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211 __ jmp(Address(method, methodOopDesc::from_compiled_offset())); |
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212 |
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213 __ bind(throw_icce); |
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214 // Restore saved register |
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215 __ popq(j_rarg1); |
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216 __ jump(RuntimeAddress(StubRoutines::throw_IncompatibleClassChangeError_entry())); |
0 | 217 |
218 __ flush(); | |
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219 |
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220 guarantee(__ pc() <= s->code_end(), "overflowed buffer"); |
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221 |
0 | 222 s->set_exception_points(npe_addr, ame_addr); |
223 return s; | |
224 } | |
225 | |
226 int VtableStub::pd_code_size_limit(bool is_vtable_stub) { | |
227 if (is_vtable_stub) { | |
228 // Vtable stub size | |
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229 return (DebugVtables ? 512 : 24) + (CountCompiledCalls ? 13 : 0) + |
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230 (UseCompressedOops ? 16 : 0); // 1 leaq can be 3 bytes + 1 long |
0 | 231 } else { |
232 // Itable stub size | |
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233 return (DebugVtables ? 636 : 72) + (CountCompiledCalls ? 13 : 0) + |
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234 (UseCompressedOops ? 32 : 0); // 2 leaqs |
0 | 235 } |
236 } | |
237 | |
238 int VtableStub::pd_code_alignment() { | |
239 return wordSize; | |
240 } |