Mercurial > hg > graal-compiler
annotate src/cpu/sparc/vm/vtableStubs_sparc.cpp @ 1851:357451a9ae6a
6991211: assert failure on sparc: "can not have caller-save register operands at calls"
Summary: fixes sparc only assert failure following 6972540
Reviewed-by: never
| author | roland |
|---|---|
| date | Wed, 13 Oct 2010 10:29:31 +0200 |
| parents | c18cbe5936b8 |
| children | f95d63e2154a |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
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2 * Copyright (c) 1997, 2009, Oracle and/or its affiliates. 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 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 } |