Mercurial > hg > truffle
annotate src/cpu/sparc/vm/vtableStubs_sparc.cpp @ 1422:3483ec571caf
* using reflected objects instead of oops
* removed scratch from allocatable registers
* instanceof xir snippet
* arraylength xir snippet
* exceptionobject xir snippet
* VMEntries and VMExits as interfaces
* calls to VMEntries and VMExits are routet through logging proxies
author | Lukas Stadler <lukas.stadler@oracle.com> |
---|---|
date | Mon, 02 Aug 2010 15:44:38 -0700 |
parents | 6b2273dd6fa9 |
children | c18cbe5936b8 |
rev | line source |
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0 | 1 /* |
727 | 2 * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved. |
0 | 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) { | |
727 | 51 __ inc_counter(SharedRuntime::nof_megamorphic_calls_addr(), G5, G3_scratch); |
0 | 52 } |
53 #endif /* PRODUCT */ | |
54 | |
55 assert(VtableStub::receiver_location() == O0->as_VMReg(), "receiver expected in O0"); | |
56 | |
57 // get receiver klass | |
58 address npe_addr = __ pc(); | |
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59 __ load_klass(O0, G3_scratch); |
0 | 60 |
61 // set methodOop (in case of interpreted method), and destination address | |
62 int entry_offset = instanceKlass::vtable_start_offset() + vtable_index*vtableEntry::size(); | |
63 #ifndef PRODUCT | |
64 if (DebugVtables) { | |
65 Label L; | |
66 // check offset vs vtable length | |
67 __ ld(G3_scratch, instanceKlass::vtable_length_offset()*wordSize, G5); | |
68 __ cmp(G5, vtable_index*vtableEntry::size()); | |
69 __ br(Assembler::greaterUnsigned, false, Assembler::pt, L); | |
70 __ delayed()->nop(); | |
71 __ set(vtable_index, O2); | |
72 __ call_VM(noreg, CAST_FROM_FN_PTR(address, bad_compiled_vtable_index), O0, O2); | |
73 __ bind(L); | |
74 } | |
75 #endif | |
76 int v_off = entry_offset*wordSize + vtableEntry::method_offset_in_bytes(); | |
77 if( __ is_simm13(v_off) ) { | |
78 __ ld_ptr(G3, v_off, G5_method); | |
79 } else { | |
80 __ set(v_off,G5); | |
81 __ ld_ptr(G3, G5, G5_method); | |
82 } | |
83 | |
84 #ifndef PRODUCT | |
85 if (DebugVtables) { | |
86 Label L; | |
87 __ br_notnull(G5_method, false, Assembler::pt, L); | |
88 __ delayed()->nop(); | |
89 __ stop("Vtable entry is ZERO"); | |
90 __ bind(L); | |
91 } | |
92 #endif | |
93 | |
94 address ame_addr = __ pc(); // if the vtable entry is null, the method is abstract | |
95 // NOTE: for vtable dispatches, the vtable entry will never be null. | |
96 | |
97 __ ld_ptr(G5_method, in_bytes(methodOopDesc::from_compiled_offset()), G3_scratch); | |
98 | |
99 // jump to target (either compiled code or c2iadapter) | |
100 __ JMP(G3_scratch, 0); | |
101 // load methodOop (in case we call c2iadapter) | |
102 __ delayed()->nop(); | |
103 | |
104 masm->flush(); | |
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105 |
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106 if (PrintMiscellaneous && (WizardMode || Verbose)) { |
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107 tty->print_cr("vtable #%d at "PTR_FORMAT"[%d] left over: %d", |
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108 vtable_index, s->entry_point(), |
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109 (int)(s->code_end() - s->entry_point()), |
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110 (int)(s->code_end() - __ pc())); |
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111 } |
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112 guarantee(__ pc() <= s->code_end(), "overflowed buffer"); |
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113 // shut the door on sizing bugs |
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114 int slop = 2*BytesPerInstWord; // 32-bit offset is this much larger than a 13-bit one |
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115 assert(vtable_index > 10 || __ pc() + slop <= s->code_end(), "room for sethi;add"); |
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116 |
0 | 117 s->set_exception_points(npe_addr, ame_addr); |
118 return s; | |
119 } | |
120 | |
121 | |
122 // NOTE: %%%% if any change is made to this stub make sure that the function | |
123 // pd_code_size_limit is changed to ensure the correct size for VtableStub | |
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124 VtableStub* VtableStubs::create_itable_stub(int itable_index) { |
0 | 125 const int sparc_code_length = VtableStub::pd_code_size_limit(false); |
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126 VtableStub* s = new(sparc_code_length) VtableStub(false, itable_index); |
0 | 127 ResourceMark rm; |
128 CodeBuffer cb(s->entry_point(), sparc_code_length); | |
129 MacroAssembler* masm = new MacroAssembler(&cb); | |
130 | |
131 Register G3_klassOop = G3_scratch; | |
132 Register G5_interface = G5; // Passed in as an argument | |
133 Label search; | |
134 | |
135 // Entry arguments: | |
136 // G5_interface: Interface | |
137 // O0: Receiver | |
138 assert(VtableStub::receiver_location() == O0->as_VMReg(), "receiver expected in O0"); | |
139 | |
140 // get receiver klass (also an implicit null-check) | |
141 address npe_addr = __ pc(); | |
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142 __ load_klass(O0, G3_klassOop); |
0 | 143 __ verify_oop(G3_klassOop); |
144 | |
145 // Push a new window to get some temp registers. This chops the head of all | |
146 // my 64-bit %o registers in the LION build, but this is OK because no longs | |
147 // are passed in the %o registers. Instead, longs are passed in G1 and G4 | |
148 // and so those registers are not available here. | |
149 __ save(SP,-frame::register_save_words*wordSize,SP); | |
150 | |
151 #ifndef PRODUCT | |
152 if (CountCompiledCalls) { | |
727 | 153 __ inc_counter(SharedRuntime::nof_megamorphic_calls_addr(), L0, L1); |
0 | 154 } |
155 #endif /* PRODUCT */ | |
156 | |
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157 Label throw_icce; |
0 | 158 |
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159 Register L5_method = L5; |
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160 __ lookup_interface_method(// inputs: rec. class, interface, itable index |
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161 G3_klassOop, G5_interface, itable_index, |
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162 // outputs: method, scan temp. reg |
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163 L5_method, L2, L3, |
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164 throw_icce); |
0 | 165 |
166 #ifndef PRODUCT | |
167 if (DebugVtables) { | |
168 Label L01; | |
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169 __ bpr(Assembler::rc_nz, false, Assembler::pt, L5_method, L01); |
0 | 170 __ delayed()->nop(); |
171 __ stop("methodOop is null"); | |
172 __ bind(L01); | |
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173 __ verify_oop(L5_method); |
0 | 174 } |
175 #endif | |
176 | |
177 // If the following load is through a NULL pointer, we'll take an OS | |
178 // exception that should translate into an AbstractMethodError. We need the | |
179 // window count to be correct at that time. | |
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180 __ restore(L5_method, 0, G5_method); |
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181 // Restore registers *before* the AME point. |
0 | 182 |
183 address ame_addr = __ pc(); // if the vtable entry is null, the method is abstract | |
184 __ ld_ptr(G5_method, in_bytes(methodOopDesc::from_compiled_offset()), G3_scratch); | |
185 | |
186 // G5_method: methodOop | |
187 // O0: Receiver | |
188 // G3_scratch: entry point | |
189 __ JMP(G3_scratch, 0); | |
190 __ delayed()->nop(); | |
191 | |
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192 __ bind(throw_icce); |
727 | 193 AddressLiteral icce(StubRoutines::throw_IncompatibleClassChangeError_entry()); |
194 __ jump_to(icce, G3_scratch); | |
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195 __ delayed()->restore(); |
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196 |
0 | 197 masm->flush(); |
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198 |
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199 if (PrintMiscellaneous && (WizardMode || Verbose)) { |
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200 tty->print_cr("itable #%d at "PTR_FORMAT"[%d] left over: %d", |
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201 itable_index, s->entry_point(), |
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202 (int)(s->code_end() - s->entry_point()), |
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203 (int)(s->code_end() - __ pc())); |
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204 } |
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205 guarantee(__ pc() <= s->code_end(), "overflowed buffer"); |
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206 // shut the door on sizing bugs |
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207 int slop = 2*BytesPerInstWord; // 32-bit offset is this much larger than a 13-bit one |
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208 assert(itable_index > 10 || __ pc() + slop <= s->code_end(), "room for sethi;add"); |
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209 |
0 | 210 s->set_exception_points(npe_addr, ame_addr); |
211 return s; | |
212 } | |
213 | |
214 | |
215 int VtableStub::pd_code_size_limit(bool is_vtable_stub) { | |
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216 if (TraceJumps || DebugVtables || CountCompiledCalls || VerifyOops) return 1000; |
0 | 217 else { |
218 const int slop = 2*BytesPerInstWord; // sethi;add (needed for long offsets) | |
219 if (is_vtable_stub) { | |
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220 // ld;ld;ld,jmp,nop |
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221 const int basic = 5*BytesPerInstWord + |
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222 // shift;add for load_klass (only shift with zero heap based) |
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223 (UseCompressedOops ? |
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224 ((Universe::narrow_oop_base() == NULL) ? BytesPerInstWord : 2*BytesPerInstWord) : 0); |
0 | 225 return basic + slop; |
226 } else { | |
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227 const int basic = (28 LP64_ONLY(+ 6)) * BytesPerInstWord + |
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228 // shift;add for load_klass (only shift with zero heap based) |
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229 (UseCompressedOops ? |
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230 ((Universe::narrow_oop_base() == NULL) ? BytesPerInstWord : 2*BytesPerInstWord) : 0); |
0 | 231 return (basic + slop); |
232 } | |
233 } | |
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234 |
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235 // In order to tune these parameters, run the JVM with VM options |
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236 // +PrintMiscellaneous and +WizardMode to see information about |
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237 // actual itable stubs. Look for lines like this: |
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238 // itable #1 at 0x5551212[116] left over: 8 |
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239 // Reduce the constants so that the "left over" number is 8 |
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240 // Do not aim at a left-over number of zero, because a very |
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241 // large vtable or itable offset (> 4K) will require an extra |
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242 // sethi/or pair of instructions. |
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243 // |
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244 // The JVM98 app. _202_jess has a megamorphic interface call. |
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245 // The itable code looks like this: |
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246 // Decoding VtableStub itbl[1]@16 |
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247 // ld [ %o0 + 4 ], %g3 |
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248 // save %sp, -64, %sp |
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249 // ld [ %g3 + 0xe8 ], %l2 |
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250 // sll %l2, 2, %l2 |
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251 // add %l2, 0x134, %l2 |
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252 // and %l2, -8, %l2 ! NOT_LP64 only |
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253 // add %g3, %l2, %l2 |
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254 // add %g3, 4, %g3 |
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255 // ld [ %l2 ], %l5 |
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256 // brz,pn %l5, throw_icce |
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257 // cmp %l5, %g5 |
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258 // be %icc, success |
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259 // add %l2, 8, %l2 |
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260 // loop: |
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261 // ld [ %l2 ], %l5 |
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262 // brz,pn %l5, throw_icce |
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263 // cmp %l5, %g5 |
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264 // bne,pn %icc, loop |
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265 // add %l2, 8, %l2 |
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266 // success: |
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267 // ld [ %l2 + -4 ], %l2 |
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268 // ld [ %g3 + %l2 ], %l5 |
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269 // restore %l5, 0, %g5 |
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270 // ld [ %g5 + 0x44 ], %g3 |
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271 // jmp %g3 |
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272 // nop |
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273 // throw_icce: |
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274 // sethi %hi(throw_ICCE_entry), %g3 |
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275 // ! 5 more instructions here, LP64_ONLY |
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276 // jmp %g3 + %lo(throw_ICCE_entry) |
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277 // restore |
0 | 278 } |
279 | |
280 | |
281 int VtableStub::pd_code_alignment() { | |
282 // UltraSPARC cache line size is 8 instructions: | |
283 const unsigned int icache_line_size = 32; | |
284 return icache_line_size; | |
285 } |