Mercurial > hg > truffle
annotate src/cpu/sparc/vm/vtableStubs_sparc.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 |
|---|---|
| date | Sun, 13 Apr 2008 17:43:42 -0400 |
| parents | f8236e79048a |
| children | d1605aabd0a1 |
| rev | line source |
|---|---|
| 0 | 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(); | |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
16
diff
changeset
|
63 __ load_klass(O0, G3_scratch); |
| 0 | 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(); | |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
16
diff
changeset
|
134 __ load_klass(O0, G3_klassOop); |
| 0 | 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 | |
|
16
f8236e79048a
6664627: Merge changes made only in hotspot 11 forward to jdk 7
dcubed
parents:
0
diff
changeset
|
179 // If the entry is NULL then we've reached the end of the table |
|
f8236e79048a
6664627: Merge changes made only in hotspot 11 forward to jdk 7
dcubed
parents:
0
diff
changeset
|
180 // without finding the expected interface, so throw an exception |
|
f8236e79048a
6664627: Merge changes made only in hotspot 11 forward to jdk 7
dcubed
parents:
0
diff
changeset
|
181 Label throw_icce; |
|
f8236e79048a
6664627: Merge changes made only in hotspot 11 forward to jdk 7
dcubed
parents:
0
diff
changeset
|
182 __ bpr(Assembler::rc_z, false, Assembler::pn, L1, throw_icce); |
|
f8236e79048a
6664627: Merge changes made only in hotspot 11 forward to jdk 7
dcubed
parents:
0
diff
changeset
|
183 __ delayed()->cmp(G5_interface, L1); |
| 0 | 184 __ brx(Assembler::notEqual, true, Assembler::pn, search); |
| 185 __ delayed()->add(L0, itableOffsetEntry::size() * wordSize, L0); | |
| 186 | |
| 187 // entry found and L0 points to it, move offset of vtable for interface into L0 | |
| 188 __ ld(L0, base + itableOffsetEntry::offset_offset_in_bytes(), L0); | |
| 189 | |
| 190 // Compute itableMethodEntry and get methodOop(G5_method) and entrypoint(L0) for compiler | |
| 191 const int method_offset = (itableMethodEntry::size() * wordSize * vtable_index) + itableMethodEntry::method_offset_in_bytes(); | |
| 192 __ add(G3_klassOop, L0, L1); | |
| 193 __ ld_ptr(L1, method_offset, G5_method); | |
| 194 | |
| 195 #ifndef PRODUCT | |
| 196 if (DebugVtables) { | |
| 197 Label L01; | |
| 198 __ ld_ptr(L1, method_offset, G5_method); | |
| 199 __ bpr(Assembler::rc_nz, false, Assembler::pt, G5_method, L01); | |
| 200 __ delayed()->nop(); | |
| 201 __ stop("methodOop is null"); | |
| 202 __ bind(L01); | |
| 203 __ verify_oop(G5_method); | |
| 204 } | |
| 205 #endif | |
| 206 | |
| 207 // If the following load is through a NULL pointer, we'll take an OS | |
| 208 // exception that should translate into an AbstractMethodError. We need the | |
| 209 // window count to be correct at that time. | |
| 210 __ restore(); // Restore registers BEFORE the AME point | |
| 211 | |
| 212 address ame_addr = __ pc(); // if the vtable entry is null, the method is abstract | |
| 213 __ ld_ptr(G5_method, in_bytes(methodOopDesc::from_compiled_offset()), G3_scratch); | |
| 214 | |
| 215 // G5_method: methodOop | |
| 216 // O0: Receiver | |
| 217 // G3_scratch: entry point | |
| 218 __ JMP(G3_scratch, 0); | |
| 219 __ delayed()->nop(); | |
| 220 | |
|
16
f8236e79048a
6664627: Merge changes made only in hotspot 11 forward to jdk 7
dcubed
parents:
0
diff
changeset
|
221 __ bind(throw_icce); |
|
f8236e79048a
6664627: Merge changes made only in hotspot 11 forward to jdk 7
dcubed
parents:
0
diff
changeset
|
222 Address icce(G3_scratch, StubRoutines::throw_IncompatibleClassChangeError_entry()); |
|
f8236e79048a
6664627: Merge changes made only in hotspot 11 forward to jdk 7
dcubed
parents:
0
diff
changeset
|
223 __ jump_to(icce, 0); |
|
f8236e79048a
6664627: Merge changes made only in hotspot 11 forward to jdk 7
dcubed
parents:
0
diff
changeset
|
224 __ delayed()->restore(); |
|
f8236e79048a
6664627: Merge changes made only in hotspot 11 forward to jdk 7
dcubed
parents:
0
diff
changeset
|
225 |
| 0 | 226 masm->flush(); |
|
16
f8236e79048a
6664627: Merge changes made only in hotspot 11 forward to jdk 7
dcubed
parents:
0
diff
changeset
|
227 |
|
f8236e79048a
6664627: Merge changes made only in hotspot 11 forward to jdk 7
dcubed
parents:
0
diff
changeset
|
228 guarantee(__ pc() <= s->code_end(), "overflowed buffer"); |
|
f8236e79048a
6664627: Merge changes made only in hotspot 11 forward to jdk 7
dcubed
parents:
0
diff
changeset
|
229 |
| 0 | 230 s->set_exception_points(npe_addr, ame_addr); |
| 231 return s; | |
| 232 } | |
| 233 | |
| 234 | |
| 235 int VtableStub::pd_code_size_limit(bool is_vtable_stub) { | |
|
16
f8236e79048a
6664627: Merge changes made only in hotspot 11 forward to jdk 7
dcubed
parents:
0
diff
changeset
|
236 if (TraceJumps || DebugVtables || CountCompiledCalls || VerifyOops) return 1000; |
| 0 | 237 else { |
| 238 const int slop = 2*BytesPerInstWord; // sethi;add (needed for long offsets) | |
| 239 if (is_vtable_stub) { | |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
16
diff
changeset
|
240 // ld;ld;ld,jmp,nop |
|
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
16
diff
changeset
|
241 const int basic = 5*BytesPerInstWord + |
|
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
16
diff
changeset
|
242 // shift;add for load_klass |
|
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
16
diff
changeset
|
243 (UseCompressedOops ? 2*BytesPerInstWord : 0); |
| 0 | 244 return basic + slop; |
| 245 } else { | |
|
16
f8236e79048a
6664627: Merge changes made only in hotspot 11 forward to jdk 7
dcubed
parents:
0
diff
changeset
|
246 // save, ld, ld, sll, and, add, add, ld, cmp, br, add, ld, add, ld, ld, jmp, restore, sethi, jmpl, restore |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
16
diff
changeset
|
247 const int basic = (20 LP64_ONLY(+ 6)) * BytesPerInstWord + |
|
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
16
diff
changeset
|
248 // shift;add for load_klass |
|
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
16
diff
changeset
|
249 (UseCompressedOops ? 2*BytesPerInstWord : 0); |
| 0 | 250 return (basic + slop); |
| 251 } | |
| 252 } | |
| 253 } | |
| 254 | |
| 255 | |
| 256 int VtableStub::pd_code_alignment() { | |
| 257 // UltraSPARC cache line size is 8 instructions: | |
| 258 const unsigned int icache_line_size = 32; | |
| 259 return icache_line_size; | |
| 260 } |