Mercurial > hg > truffle
comparison src/cpu/sparc/vm/vtableStubs_sparc.cpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | f8236e79048a |
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1 /* | |
2 * Copyright 1997-2006 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_sparc.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 | |
34 #ifndef PRODUCT | |
35 extern "C" void bad_compiled_vtable_index(JavaThread* thread, oopDesc* receiver, int index); | |
36 #endif | |
37 | |
38 | |
39 // Used by compiler only; may use only caller saved, non-argument registers | |
40 // NOTE: %%%% if any change is made to this stub make sure that the function | |
41 // pd_code_size_limit is changed to ensure the correct size for VtableStub | |
42 VtableStub* VtableStubs::create_vtable_stub(int vtable_index) { | |
43 const int sparc_code_length = VtableStub::pd_code_size_limit(true); | |
44 VtableStub* s = new(sparc_code_length) VtableStub(true, vtable_index); | |
45 ResourceMark rm; | |
46 CodeBuffer cb(s->entry_point(), sparc_code_length); | |
47 MacroAssembler* masm = new MacroAssembler(&cb); | |
48 | |
49 #ifndef PRODUCT | |
50 if (CountCompiledCalls) { | |
51 Address ctr(G5, SharedRuntime::nof_megamorphic_calls_addr()); | |
52 __ sethi(ctr); | |
53 __ ld(ctr, G3_scratch); | |
54 __ inc(G3_scratch); | |
55 __ st(G3_scratch, ctr); | |
56 } | |
57 #endif /* PRODUCT */ | |
58 | |
59 assert(VtableStub::receiver_location() == O0->as_VMReg(), "receiver expected in O0"); | |
60 | |
61 // get receiver klass | |
62 address npe_addr = __ pc(); | |
63 __ ld_ptr(O0, oopDesc::klass_offset_in_bytes(), G3_scratch); | |
64 | |
65 // set methodOop (in case of interpreted method), and destination address | |
66 int entry_offset = instanceKlass::vtable_start_offset() + vtable_index*vtableEntry::size(); | |
67 #ifndef PRODUCT | |
68 if (DebugVtables) { | |
69 Label L; | |
70 // check offset vs vtable length | |
71 __ ld(G3_scratch, instanceKlass::vtable_length_offset()*wordSize, G5); | |
72 __ cmp(G5, vtable_index*vtableEntry::size()); | |
73 __ br(Assembler::greaterUnsigned, false, Assembler::pt, L); | |
74 __ delayed()->nop(); | |
75 __ set(vtable_index, O2); | |
76 __ call_VM(noreg, CAST_FROM_FN_PTR(address, bad_compiled_vtable_index), O0, O2); | |
77 __ bind(L); | |
78 } | |
79 #endif | |
80 int v_off = entry_offset*wordSize + vtableEntry::method_offset_in_bytes(); | |
81 if( __ is_simm13(v_off) ) { | |
82 __ ld_ptr(G3, v_off, G5_method); | |
83 } else { | |
84 __ set(v_off,G5); | |
85 __ ld_ptr(G3, G5, G5_method); | |
86 } | |
87 | |
88 #ifndef PRODUCT | |
89 if (DebugVtables) { | |
90 Label L; | |
91 __ br_notnull(G5_method, false, Assembler::pt, L); | |
92 __ delayed()->nop(); | |
93 __ stop("Vtable entry is ZERO"); | |
94 __ bind(L); | |
95 } | |
96 #endif | |
97 | |
98 address ame_addr = __ pc(); // if the vtable entry is null, the method is abstract | |
99 // NOTE: for vtable dispatches, the vtable entry will never be null. | |
100 | |
101 __ ld_ptr(G5_method, in_bytes(methodOopDesc::from_compiled_offset()), G3_scratch); | |
102 | |
103 // jump to target (either compiled code or c2iadapter) | |
104 __ JMP(G3_scratch, 0); | |
105 // load methodOop (in case we call c2iadapter) | |
106 __ delayed()->nop(); | |
107 | |
108 masm->flush(); | |
109 s->set_exception_points(npe_addr, ame_addr); | |
110 return s; | |
111 } | |
112 | |
113 | |
114 // NOTE: %%%% if any change is made to this stub make sure that the function | |
115 // pd_code_size_limit is changed to ensure the correct size for VtableStub | |
116 VtableStub* VtableStubs::create_itable_stub(int vtable_index) { | |
117 const int sparc_code_length = VtableStub::pd_code_size_limit(false); | |
118 VtableStub* s = new(sparc_code_length) VtableStub(false, vtable_index); | |
119 ResourceMark rm; | |
120 CodeBuffer cb(s->entry_point(), sparc_code_length); | |
121 MacroAssembler* masm = new MacroAssembler(&cb); | |
122 | |
123 Register G3_klassOop = G3_scratch; | |
124 Register G5_interface = G5; // Passed in as an argument | |
125 Label search; | |
126 | |
127 // Entry arguments: | |
128 // G5_interface: Interface | |
129 // O0: Receiver | |
130 assert(VtableStub::receiver_location() == O0->as_VMReg(), "receiver expected in O0"); | |
131 | |
132 // get receiver klass (also an implicit null-check) | |
133 address npe_addr = __ pc(); | |
134 __ ld_ptr(O0, oopDesc::klass_offset_in_bytes(), G3_klassOop); | |
135 __ verify_oop(G3_klassOop); | |
136 | |
137 // Push a new window to get some temp registers. This chops the head of all | |
138 // my 64-bit %o registers in the LION build, but this is OK because no longs | |
139 // are passed in the %o registers. Instead, longs are passed in G1 and G4 | |
140 // and so those registers are not available here. | |
141 __ save(SP,-frame::register_save_words*wordSize,SP); | |
142 Register I0_receiver = I0; // Location of receiver after save | |
143 | |
144 #ifndef PRODUCT | |
145 if (CountCompiledCalls) { | |
146 Address ctr(L0, SharedRuntime::nof_megamorphic_calls_addr()); | |
147 __ sethi(ctr); | |
148 __ ld(ctr, L1); | |
149 __ inc(L1); | |
150 __ st(L1, ctr); | |
151 } | |
152 #endif /* PRODUCT */ | |
153 | |
154 // load start of itable entries into L0 register | |
155 const int base = instanceKlass::vtable_start_offset() * wordSize; | |
156 __ ld(Address(G3_klassOop, 0, instanceKlass::vtable_length_offset() * wordSize), L0); | |
157 | |
158 // %%% Could store the aligned, prescaled offset in the klassoop. | |
159 __ sll(L0, exact_log2(vtableEntry::size() * wordSize), L0); | |
160 // see code for instanceKlass::start_of_itable! | |
161 const int vtable_alignment = align_object_offset(1); | |
162 assert(vtable_alignment == 1 || vtable_alignment == 2, ""); | |
163 const int odd_bit = vtableEntry::size() * wordSize; | |
164 if (vtable_alignment == 2) { | |
165 __ and3(L0, odd_bit, L1); // isolate the odd bit | |
166 } | |
167 __ add(G3_klassOop, L0, L0); | |
168 if (vtable_alignment == 2) { | |
169 __ add(L0, L1, L0); // double the odd bit, to align up | |
170 } | |
171 | |
172 // Loop over all itable entries until desired interfaceOop (G5_interface) found | |
173 __ bind(search); | |
174 | |
175 // %%%% Could load both offset and interface in one ldx, if they were | |
176 // in the opposite order. This would save a load. | |
177 __ ld_ptr(L0, base + itableOffsetEntry::interface_offset_in_bytes(), L1); | |
178 #ifdef ASSERT | |
179 Label ok; | |
180 // Check that entry is non-null and an Oop | |
181 __ bpr(Assembler::rc_nz, false, Assembler::pt, L1, ok); | |
182 __ delayed()->nop(); | |
183 __ stop("null entry point found in itable's offset table"); | |
184 __ bind(ok); | |
185 __ verify_oop(L1); | |
186 #endif // ASSERT | |
187 | |
188 __ cmp(G5_interface, L1); | |
189 __ brx(Assembler::notEqual, true, Assembler::pn, search); | |
190 __ delayed()->add(L0, itableOffsetEntry::size() * wordSize, L0); | |
191 | |
192 // entry found and L0 points to it, move offset of vtable for interface into L0 | |
193 __ ld(L0, base + itableOffsetEntry::offset_offset_in_bytes(), L0); | |
194 | |
195 // Compute itableMethodEntry and get methodOop(G5_method) and entrypoint(L0) for compiler | |
196 const int method_offset = (itableMethodEntry::size() * wordSize * vtable_index) + itableMethodEntry::method_offset_in_bytes(); | |
197 __ add(G3_klassOop, L0, L1); | |
198 __ ld_ptr(L1, method_offset, G5_method); | |
199 | |
200 #ifndef PRODUCT | |
201 if (DebugVtables) { | |
202 Label L01; | |
203 __ ld_ptr(L1, method_offset, G5_method); | |
204 __ bpr(Assembler::rc_nz, false, Assembler::pt, G5_method, L01); | |
205 __ delayed()->nop(); | |
206 __ stop("methodOop is null"); | |
207 __ bind(L01); | |
208 __ verify_oop(G5_method); | |
209 } | |
210 #endif | |
211 | |
212 // If the following load is through a NULL pointer, we'll take an OS | |
213 // exception that should translate into an AbstractMethodError. We need the | |
214 // window count to be correct at that time. | |
215 __ restore(); // Restore registers BEFORE the AME point | |
216 | |
217 address ame_addr = __ pc(); // if the vtable entry is null, the method is abstract | |
218 __ ld_ptr(G5_method, in_bytes(methodOopDesc::from_compiled_offset()), G3_scratch); | |
219 | |
220 // G5_method: methodOop | |
221 // O0: Receiver | |
222 // G3_scratch: entry point | |
223 __ JMP(G3_scratch, 0); | |
224 __ delayed()->nop(); | |
225 | |
226 masm->flush(); | |
227 s->set_exception_points(npe_addr, ame_addr); | |
228 return s; | |
229 } | |
230 | |
231 | |
232 int VtableStub::pd_code_size_limit(bool is_vtable_stub) { | |
233 if (TraceJumps || DebugVtables || CountCompiledCalls || VerifyOops) return 999; | |
234 else { | |
235 const int slop = 2*BytesPerInstWord; // sethi;add (needed for long offsets) | |
236 if (is_vtable_stub) { | |
237 const int basic = 5*BytesPerInstWord; // ld;ld;ld,jmp,nop | |
238 return basic + slop; | |
239 } else { | |
240 #ifdef ASSERT | |
241 return 999; | |
242 #endif // ASSERT | |
243 const int basic = 17*BytesPerInstWord; // save, ld, ld, sll, and, add, add, ld, cmp, br, add, ld, add, ld, ld, jmp, restore | |
244 return (basic + slop); | |
245 } | |
246 } | |
247 } | |
248 | |
249 | |
250 int VtableStub::pd_code_alignment() { | |
251 // UltraSPARC cache line size is 8 instructions: | |
252 const unsigned int icache_line_size = 32; | |
253 return icache_line_size; | |
254 } | |
255 | |
256 | |
257 //Reconciliation History | |
258 // 1.2 97/12/09 17:13:31 vtableStubs_i486.cpp | |
259 // 1.4 98/01/21 19:18:37 vtableStubs_i486.cpp | |
260 // 1.5 98/02/13 16:33:55 vtableStubs_i486.cpp | |
261 // 1.7 98/03/05 17:17:28 vtableStubs_i486.cpp | |
262 // 1.9 98/05/18 09:26:17 vtableStubs_i486.cpp | |
263 // 1.10 98/05/26 16:28:13 vtableStubs_i486.cpp | |
264 // 1.11 98/05/27 08:51:35 vtableStubs_i486.cpp | |
265 // 1.12 98/06/15 15:04:12 vtableStubs_i486.cpp | |
266 // 1.13 98/07/28 18:44:22 vtableStubs_i486.cpp | |
267 // 1.15 98/08/28 11:31:19 vtableStubs_i486.cpp | |
268 // 1.16 98/09/02 12:58:31 vtableStubs_i486.cpp | |
269 // 1.17 98/09/04 12:15:52 vtableStubs_i486.cpp | |
270 // 1.18 98/11/19 11:55:24 vtableStubs_i486.cpp | |
271 // 1.19 99/01/12 14:57:56 vtableStubs_i486.cpp | |
272 // 1.20 99/01/19 17:42:52 vtableStubs_i486.cpp | |
273 // 1.22 99/01/21 10:29:25 vtableStubs_i486.cpp | |
274 // 1.30 99/06/02 15:27:39 vtableStubs_i486.cpp | |
275 // 1.26 99/06/24 14:25:07 vtableStubs_i486.cpp | |
276 // 1.23 99/02/22 14:37:52 vtableStubs_i486.cpp | |
277 // 1.28 99/06/29 18:06:17 vtableStubs_i486.cpp | |
278 // 1.29 99/07/22 17:03:44 vtableStubs_i486.cpp | |
279 // 1.30 99/08/11 09:33:27 vtableStubs_i486.cpp | |
280 //End |