1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/cpu/sparc/vm/vtableStubs_sparc.cpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,280 @@
1.4 +/*
1.5 + * Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#include "incls/_precompiled.incl"
1.29 +#include "incls/_vtableStubs_sparc.cpp.incl"
1.30 +
1.31 +// machine-dependent part of VtableStubs: create vtableStub of correct size and
1.32 +// initialize its code
1.33 +
1.34 +#define __ masm->
1.35 +
1.36 +
1.37 +#ifndef PRODUCT
1.38 +extern "C" void bad_compiled_vtable_index(JavaThread* thread, oopDesc* receiver, int index);
1.39 +#endif
1.40 +
1.41 +
1.42 +// Used by compiler only; may use only caller saved, non-argument registers
1.43 +// NOTE: %%%% if any change is made to this stub make sure that the function
1.44 +// pd_code_size_limit is changed to ensure the correct size for VtableStub
1.45 +VtableStub* VtableStubs::create_vtable_stub(int vtable_index) {
1.46 + const int sparc_code_length = VtableStub::pd_code_size_limit(true);
1.47 + VtableStub* s = new(sparc_code_length) VtableStub(true, vtable_index);
1.48 + ResourceMark rm;
1.49 + CodeBuffer cb(s->entry_point(), sparc_code_length);
1.50 + MacroAssembler* masm = new MacroAssembler(&cb);
1.51 +
1.52 +#ifndef PRODUCT
1.53 + if (CountCompiledCalls) {
1.54 + Address ctr(G5, SharedRuntime::nof_megamorphic_calls_addr());
1.55 + __ sethi(ctr);
1.56 + __ ld(ctr, G3_scratch);
1.57 + __ inc(G3_scratch);
1.58 + __ st(G3_scratch, ctr);
1.59 + }
1.60 +#endif /* PRODUCT */
1.61 +
1.62 + assert(VtableStub::receiver_location() == O0->as_VMReg(), "receiver expected in O0");
1.63 +
1.64 + // get receiver klass
1.65 + address npe_addr = __ pc();
1.66 + __ ld_ptr(O0, oopDesc::klass_offset_in_bytes(), G3_scratch);
1.67 +
1.68 + // set methodOop (in case of interpreted method), and destination address
1.69 + int entry_offset = instanceKlass::vtable_start_offset() + vtable_index*vtableEntry::size();
1.70 +#ifndef PRODUCT
1.71 + if (DebugVtables) {
1.72 + Label L;
1.73 + // check offset vs vtable length
1.74 + __ ld(G3_scratch, instanceKlass::vtable_length_offset()*wordSize, G5);
1.75 + __ cmp(G5, vtable_index*vtableEntry::size());
1.76 + __ br(Assembler::greaterUnsigned, false, Assembler::pt, L);
1.77 + __ delayed()->nop();
1.78 + __ set(vtable_index, O2);
1.79 + __ call_VM(noreg, CAST_FROM_FN_PTR(address, bad_compiled_vtable_index), O0, O2);
1.80 + __ bind(L);
1.81 + }
1.82 +#endif
1.83 + int v_off = entry_offset*wordSize + vtableEntry::method_offset_in_bytes();
1.84 + if( __ is_simm13(v_off) ) {
1.85 + __ ld_ptr(G3, v_off, G5_method);
1.86 + } else {
1.87 + __ set(v_off,G5);
1.88 + __ ld_ptr(G3, G5, G5_method);
1.89 + }
1.90 +
1.91 +#ifndef PRODUCT
1.92 + if (DebugVtables) {
1.93 + Label L;
1.94 + __ br_notnull(G5_method, false, Assembler::pt, L);
1.95 + __ delayed()->nop();
1.96 + __ stop("Vtable entry is ZERO");
1.97 + __ bind(L);
1.98 + }
1.99 +#endif
1.100 +
1.101 + address ame_addr = __ pc(); // if the vtable entry is null, the method is abstract
1.102 + // NOTE: for vtable dispatches, the vtable entry will never be null.
1.103 +
1.104 + __ ld_ptr(G5_method, in_bytes(methodOopDesc::from_compiled_offset()), G3_scratch);
1.105 +
1.106 + // jump to target (either compiled code or c2iadapter)
1.107 + __ JMP(G3_scratch, 0);
1.108 + // load methodOop (in case we call c2iadapter)
1.109 + __ delayed()->nop();
1.110 +
1.111 + masm->flush();
1.112 + s->set_exception_points(npe_addr, ame_addr);
1.113 + return s;
1.114 +}
1.115 +
1.116 +
1.117 +// NOTE: %%%% if any change is made to this stub make sure that the function
1.118 +// pd_code_size_limit is changed to ensure the correct size for VtableStub
1.119 +VtableStub* VtableStubs::create_itable_stub(int vtable_index) {
1.120 + const int sparc_code_length = VtableStub::pd_code_size_limit(false);
1.121 + VtableStub* s = new(sparc_code_length) VtableStub(false, vtable_index);
1.122 + ResourceMark rm;
1.123 + CodeBuffer cb(s->entry_point(), sparc_code_length);
1.124 + MacroAssembler* masm = new MacroAssembler(&cb);
1.125 +
1.126 + Register G3_klassOop = G3_scratch;
1.127 + Register G5_interface = G5; // Passed in as an argument
1.128 + Label search;
1.129 +
1.130 + // Entry arguments:
1.131 + // G5_interface: Interface
1.132 + // O0: Receiver
1.133 + assert(VtableStub::receiver_location() == O0->as_VMReg(), "receiver expected in O0");
1.134 +
1.135 + // get receiver klass (also an implicit null-check)
1.136 + address npe_addr = __ pc();
1.137 + __ ld_ptr(O0, oopDesc::klass_offset_in_bytes(), G3_klassOop);
1.138 + __ verify_oop(G3_klassOop);
1.139 +
1.140 + // Push a new window to get some temp registers. This chops the head of all
1.141 + // my 64-bit %o registers in the LION build, but this is OK because no longs
1.142 + // are passed in the %o registers. Instead, longs are passed in G1 and G4
1.143 + // and so those registers are not available here.
1.144 + __ save(SP,-frame::register_save_words*wordSize,SP);
1.145 + Register I0_receiver = I0; // Location of receiver after save
1.146 +
1.147 +#ifndef PRODUCT
1.148 + if (CountCompiledCalls) {
1.149 + Address ctr(L0, SharedRuntime::nof_megamorphic_calls_addr());
1.150 + __ sethi(ctr);
1.151 + __ ld(ctr, L1);
1.152 + __ inc(L1);
1.153 + __ st(L1, ctr);
1.154 + }
1.155 +#endif /* PRODUCT */
1.156 +
1.157 + // load start of itable entries into L0 register
1.158 + const int base = instanceKlass::vtable_start_offset() * wordSize;
1.159 + __ ld(Address(G3_klassOop, 0, instanceKlass::vtable_length_offset() * wordSize), L0);
1.160 +
1.161 + // %%% Could store the aligned, prescaled offset in the klassoop.
1.162 + __ sll(L0, exact_log2(vtableEntry::size() * wordSize), L0);
1.163 + // see code for instanceKlass::start_of_itable!
1.164 + const int vtable_alignment = align_object_offset(1);
1.165 + assert(vtable_alignment == 1 || vtable_alignment == 2, "");
1.166 + const int odd_bit = vtableEntry::size() * wordSize;
1.167 + if (vtable_alignment == 2) {
1.168 + __ and3(L0, odd_bit, L1); // isolate the odd bit
1.169 + }
1.170 + __ add(G3_klassOop, L0, L0);
1.171 + if (vtable_alignment == 2) {
1.172 + __ add(L0, L1, L0); // double the odd bit, to align up
1.173 + }
1.174 +
1.175 + // Loop over all itable entries until desired interfaceOop (G5_interface) found
1.176 + __ bind(search);
1.177 +
1.178 + // %%%% Could load both offset and interface in one ldx, if they were
1.179 + // in the opposite order. This would save a load.
1.180 + __ ld_ptr(L0, base + itableOffsetEntry::interface_offset_in_bytes(), L1);
1.181 +#ifdef ASSERT
1.182 + Label ok;
1.183 + // Check that entry is non-null and an Oop
1.184 + __ bpr(Assembler::rc_nz, false, Assembler::pt, L1, ok);
1.185 + __ delayed()->nop();
1.186 + __ stop("null entry point found in itable's offset table");
1.187 + __ bind(ok);
1.188 + __ verify_oop(L1);
1.189 +#endif // ASSERT
1.190 +
1.191 + __ cmp(G5_interface, L1);
1.192 + __ brx(Assembler::notEqual, true, Assembler::pn, search);
1.193 + __ delayed()->add(L0, itableOffsetEntry::size() * wordSize, L0);
1.194 +
1.195 + // entry found and L0 points to it, move offset of vtable for interface into L0
1.196 + __ ld(L0, base + itableOffsetEntry::offset_offset_in_bytes(), L0);
1.197 +
1.198 + // Compute itableMethodEntry and get methodOop(G5_method) and entrypoint(L0) for compiler
1.199 + const int method_offset = (itableMethodEntry::size() * wordSize * vtable_index) + itableMethodEntry::method_offset_in_bytes();
1.200 + __ add(G3_klassOop, L0, L1);
1.201 + __ ld_ptr(L1, method_offset, G5_method);
1.202 +
1.203 +#ifndef PRODUCT
1.204 + if (DebugVtables) {
1.205 + Label L01;
1.206 + __ ld_ptr(L1, method_offset, G5_method);
1.207 + __ bpr(Assembler::rc_nz, false, Assembler::pt, G5_method, L01);
1.208 + __ delayed()->nop();
1.209 + __ stop("methodOop is null");
1.210 + __ bind(L01);
1.211 + __ verify_oop(G5_method);
1.212 + }
1.213 +#endif
1.214 +
1.215 + // If the following load is through a NULL pointer, we'll take an OS
1.216 + // exception that should translate into an AbstractMethodError. We need the
1.217 + // window count to be correct at that time.
1.218 + __ restore(); // Restore registers BEFORE the AME point
1.219 +
1.220 + address ame_addr = __ pc(); // if the vtable entry is null, the method is abstract
1.221 + __ ld_ptr(G5_method, in_bytes(methodOopDesc::from_compiled_offset()), G3_scratch);
1.222 +
1.223 + // G5_method: methodOop
1.224 + // O0: Receiver
1.225 + // G3_scratch: entry point
1.226 + __ JMP(G3_scratch, 0);
1.227 + __ delayed()->nop();
1.228 +
1.229 + masm->flush();
1.230 + s->set_exception_points(npe_addr, ame_addr);
1.231 + return s;
1.232 +}
1.233 +
1.234 +
1.235 +int VtableStub::pd_code_size_limit(bool is_vtable_stub) {
1.236 + if (TraceJumps || DebugVtables || CountCompiledCalls || VerifyOops) return 999;
1.237 + else {
1.238 + const int slop = 2*BytesPerInstWord; // sethi;add (needed for long offsets)
1.239 + if (is_vtable_stub) {
1.240 + const int basic = 5*BytesPerInstWord; // ld;ld;ld,jmp,nop
1.241 + return basic + slop;
1.242 + } else {
1.243 +#ifdef ASSERT
1.244 + return 999;
1.245 +#endif // ASSERT
1.246 + const int basic = 17*BytesPerInstWord; // save, ld, ld, sll, and, add, add, ld, cmp, br, add, ld, add, ld, ld, jmp, restore
1.247 + return (basic + slop);
1.248 + }
1.249 + }
1.250 +}
1.251 +
1.252 +
1.253 +int VtableStub::pd_code_alignment() {
1.254 + // UltraSPARC cache line size is 8 instructions:
1.255 + const unsigned int icache_line_size = 32;
1.256 + return icache_line_size;
1.257 +}
1.258 +
1.259 +
1.260 +//Reconciliation History
1.261 +// 1.2 97/12/09 17:13:31 vtableStubs_i486.cpp
1.262 +// 1.4 98/01/21 19:18:37 vtableStubs_i486.cpp
1.263 +// 1.5 98/02/13 16:33:55 vtableStubs_i486.cpp
1.264 +// 1.7 98/03/05 17:17:28 vtableStubs_i486.cpp
1.265 +// 1.9 98/05/18 09:26:17 vtableStubs_i486.cpp
1.266 +// 1.10 98/05/26 16:28:13 vtableStubs_i486.cpp
1.267 +// 1.11 98/05/27 08:51:35 vtableStubs_i486.cpp
1.268 +// 1.12 98/06/15 15:04:12 vtableStubs_i486.cpp
1.269 +// 1.13 98/07/28 18:44:22 vtableStubs_i486.cpp
1.270 +// 1.15 98/08/28 11:31:19 vtableStubs_i486.cpp
1.271 +// 1.16 98/09/02 12:58:31 vtableStubs_i486.cpp
1.272 +// 1.17 98/09/04 12:15:52 vtableStubs_i486.cpp
1.273 +// 1.18 98/11/19 11:55:24 vtableStubs_i486.cpp
1.274 +// 1.19 99/01/12 14:57:56 vtableStubs_i486.cpp
1.275 +// 1.20 99/01/19 17:42:52 vtableStubs_i486.cpp
1.276 +// 1.22 99/01/21 10:29:25 vtableStubs_i486.cpp
1.277 +// 1.30 99/06/02 15:27:39 vtableStubs_i486.cpp
1.278 +// 1.26 99/06/24 14:25:07 vtableStubs_i486.cpp
1.279 +// 1.23 99/02/22 14:37:52 vtableStubs_i486.cpp
1.280 +// 1.28 99/06/29 18:06:17 vtableStubs_i486.cpp
1.281 +// 1.29 99/07/22 17:03:44 vtableStubs_i486.cpp
1.282 +// 1.30 99/08/11 09:33:27 vtableStubs_i486.cpp
1.283 +//End
