Tue, 10 Mar 2009 08:52:16 -0700
Merge
duke@435 | 1 | /* |
xdono@772 | 2 | * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | #include "incls/_precompiled.incl" |
duke@435 | 26 | #include "incls/_vtableStubs_x86_32.cpp.incl" |
duke@435 | 27 | |
duke@435 | 28 | // machine-dependent part of VtableStubs: create VtableStub of correct size and |
duke@435 | 29 | // initialize its code |
duke@435 | 30 | |
duke@435 | 31 | #define __ masm-> |
duke@435 | 32 | |
duke@435 | 33 | #ifndef PRODUCT |
duke@435 | 34 | extern "C" void bad_compiled_vtable_index(JavaThread* thread, oop receiver, int index); |
duke@435 | 35 | #endif |
duke@435 | 36 | |
jrose@1058 | 37 | // These stubs are used by the compiler only. |
jrose@1058 | 38 | // Argument registers, which must be preserved: |
jrose@1058 | 39 | // rcx - receiver (always first argument) |
jrose@1058 | 40 | // rdx - second argument (if any) |
jrose@1058 | 41 | // Other registers that might be usable: |
jrose@1058 | 42 | // rax - inline cache register (is interface for itable stub) |
jrose@1058 | 43 | // rbx - method (used when calling out to interpreter) |
jrose@1058 | 44 | // Available now, but may become callee-save at some point: |
jrose@1058 | 45 | // rsi, rdi |
jrose@1058 | 46 | // Note that rax and rdx are also used for return values. |
duke@435 | 47 | // |
duke@435 | 48 | VtableStub* VtableStubs::create_vtable_stub(int vtable_index) { |
duke@435 | 49 | const int i486_code_length = VtableStub::pd_code_size_limit(true); |
duke@435 | 50 | VtableStub* s = new(i486_code_length) VtableStub(true, vtable_index); |
duke@435 | 51 | ResourceMark rm; |
duke@435 | 52 | CodeBuffer cb(s->entry_point(), i486_code_length); |
duke@435 | 53 | MacroAssembler* masm = new MacroAssembler(&cb); |
duke@435 | 54 | |
duke@435 | 55 | #ifndef PRODUCT |
duke@435 | 56 | |
duke@435 | 57 | if (CountCompiledCalls) { |
never@739 | 58 | __ incrementl(ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr())); |
duke@435 | 59 | } |
duke@435 | 60 | #endif /* PRODUCT */ |
duke@435 | 61 | |
duke@435 | 62 | // get receiver (need to skip return address on top of stack) |
duke@435 | 63 | assert(VtableStub::receiver_location() == rcx->as_VMReg(), "receiver expected in rcx"); |
duke@435 | 64 | |
duke@435 | 65 | // get receiver klass |
duke@435 | 66 | address npe_addr = __ pc(); |
never@739 | 67 | __ movptr(rax, Address(rcx, oopDesc::klass_offset_in_bytes())); |
duke@435 | 68 | // compute entry offset (in words) |
duke@435 | 69 | int entry_offset = instanceKlass::vtable_start_offset() + vtable_index*vtableEntry::size(); |
duke@435 | 70 | #ifndef PRODUCT |
duke@435 | 71 | if (DebugVtables) { |
duke@435 | 72 | Label L; |
duke@435 | 73 | // check offset vs vtable length |
duke@435 | 74 | __ cmpl(Address(rax, instanceKlass::vtable_length_offset()*wordSize), vtable_index*vtableEntry::size()); |
duke@435 | 75 | __ jcc(Assembler::greater, L); |
duke@435 | 76 | __ movl(rbx, vtable_index); |
duke@435 | 77 | __ call_VM(noreg, CAST_FROM_FN_PTR(address, bad_compiled_vtable_index), rcx, rbx); |
duke@435 | 78 | __ bind(L); |
duke@435 | 79 | } |
duke@435 | 80 | #endif // PRODUCT |
duke@435 | 81 | |
duke@435 | 82 | const Register method = rbx; |
duke@435 | 83 | |
duke@435 | 84 | // load methodOop and target address |
never@739 | 85 | __ movptr(method, Address(rax, entry_offset*wordSize + vtableEntry::method_offset_in_bytes())); |
duke@435 | 86 | if (DebugVtables) { |
duke@435 | 87 | Label L; |
never@739 | 88 | __ cmpptr(method, (int32_t)NULL_WORD); |
duke@435 | 89 | __ jcc(Assembler::equal, L); |
never@739 | 90 | __ cmpptr(Address(method, methodOopDesc::from_compiled_offset()), (int32_t)NULL_WORD); |
duke@435 | 91 | __ jcc(Assembler::notZero, L); |
duke@435 | 92 | __ stop("Vtable entry is NULL"); |
duke@435 | 93 | __ bind(L); |
duke@435 | 94 | } |
duke@435 | 95 | |
duke@435 | 96 | // rax,: receiver klass |
duke@435 | 97 | // method (rbx): methodOop |
duke@435 | 98 | // rcx: receiver |
duke@435 | 99 | address ame_addr = __ pc(); |
duke@435 | 100 | __ jmp( Address(method, methodOopDesc::from_compiled_offset())); |
duke@435 | 101 | |
duke@435 | 102 | masm->flush(); |
jrose@1058 | 103 | |
jrose@1058 | 104 | if (PrintMiscellaneous && (WizardMode || Verbose)) { |
jrose@1058 | 105 | tty->print_cr("vtable #%d at "PTR_FORMAT"[%d] left over: %d", |
jrose@1058 | 106 | vtable_index, s->entry_point(), |
jrose@1058 | 107 | (int)(s->code_end() - s->entry_point()), |
jrose@1058 | 108 | (int)(s->code_end() - __ pc())); |
jrose@1058 | 109 | } |
jrose@1058 | 110 | guarantee(__ pc() <= s->code_end(), "overflowed buffer"); |
jrose@1058 | 111 | |
duke@435 | 112 | s->set_exception_points(npe_addr, ame_addr); |
duke@435 | 113 | return s; |
duke@435 | 114 | } |
duke@435 | 115 | |
duke@435 | 116 | |
jrose@1058 | 117 | VtableStub* VtableStubs::create_itable_stub(int itable_index) { |
duke@435 | 118 | // Note well: pd_code_size_limit is the absolute minimum we can get away with. If you |
duke@435 | 119 | // add code here, bump the code stub size returned by pd_code_size_limit! |
duke@435 | 120 | const int i486_code_length = VtableStub::pd_code_size_limit(false); |
jrose@1058 | 121 | VtableStub* s = new(i486_code_length) VtableStub(false, itable_index); |
duke@435 | 122 | ResourceMark rm; |
duke@435 | 123 | CodeBuffer cb(s->entry_point(), i486_code_length); |
duke@435 | 124 | MacroAssembler* masm = new MacroAssembler(&cb); |
duke@435 | 125 | |
duke@435 | 126 | // Entry arguments: |
duke@435 | 127 | // rax,: Interface |
duke@435 | 128 | // rcx: Receiver |
duke@435 | 129 | |
duke@435 | 130 | #ifndef PRODUCT |
duke@435 | 131 | if (CountCompiledCalls) { |
never@739 | 132 | __ incrementl(ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr())); |
duke@435 | 133 | } |
duke@435 | 134 | #endif /* PRODUCT */ |
duke@435 | 135 | // get receiver (need to skip return address on top of stack) |
duke@435 | 136 | |
duke@435 | 137 | assert(VtableStub::receiver_location() == rcx->as_VMReg(), "receiver expected in rcx"); |
duke@435 | 138 | |
duke@435 | 139 | // get receiver klass (also an implicit null-check) |
duke@435 | 140 | address npe_addr = __ pc(); |
jrose@1058 | 141 | __ movptr(rsi, Address(rcx, oopDesc::klass_offset_in_bytes())); |
duke@435 | 142 | |
jrose@1058 | 143 | // Most registers are in use; we'll use rax, rbx, rsi, rdi |
jrose@1058 | 144 | // (If we need to make rsi, rdi callee-save, do a push/pop here.) |
jrose@1058 | 145 | const Register method = rbx; |
jrose@1058 | 146 | Label throw_icce; |
duke@435 | 147 | |
duke@435 | 148 | // Get methodOop and entrypoint for compiler |
jrose@1058 | 149 | __ lookup_interface_method(// inputs: rec. class, interface, itable index |
jrose@1058 | 150 | rsi, rax, itable_index, |
jrose@1058 | 151 | // outputs: method, scan temp. reg |
jrose@1058 | 152 | method, rdi, |
jrose@1058 | 153 | throw_icce); |
duke@435 | 154 | |
duke@435 | 155 | // method (rbx): methodOop |
duke@435 | 156 | // rcx: receiver |
duke@435 | 157 | |
duke@435 | 158 | #ifdef ASSERT |
duke@435 | 159 | if (DebugVtables) { |
duke@435 | 160 | Label L1; |
never@739 | 161 | __ cmpptr(method, (int32_t)NULL_WORD); |
duke@435 | 162 | __ jcc(Assembler::equal, L1); |
never@739 | 163 | __ cmpptr(Address(method, methodOopDesc::from_compiled_offset()), (int32_t)NULL_WORD); |
duke@435 | 164 | __ jcc(Assembler::notZero, L1); |
duke@435 | 165 | __ stop("methodOop is null"); |
duke@435 | 166 | __ bind(L1); |
duke@435 | 167 | } |
duke@435 | 168 | #endif // ASSERT |
duke@435 | 169 | |
duke@435 | 170 | address ame_addr = __ pc(); |
duke@435 | 171 | __ jmp(Address(method, methodOopDesc::from_compiled_offset())); |
duke@435 | 172 | |
dcubed@451 | 173 | __ bind(throw_icce); |
dcubed@451 | 174 | __ jump(RuntimeAddress(StubRoutines::throw_IncompatibleClassChangeError_entry())); |
duke@435 | 175 | masm->flush(); |
dcubed@451 | 176 | |
jrose@1058 | 177 | if (PrintMiscellaneous && (WizardMode || Verbose)) { |
jrose@1058 | 178 | tty->print_cr("itable #%d at "PTR_FORMAT"[%d] left over: %d", |
jrose@1058 | 179 | itable_index, s->entry_point(), |
jrose@1058 | 180 | (int)(s->code_end() - s->entry_point()), |
jrose@1058 | 181 | (int)(s->code_end() - __ pc())); |
jrose@1058 | 182 | } |
dcubed@451 | 183 | guarantee(__ pc() <= s->code_end(), "overflowed buffer"); |
dcubed@451 | 184 | |
duke@435 | 185 | s->set_exception_points(npe_addr, ame_addr); |
duke@435 | 186 | return s; |
duke@435 | 187 | } |
duke@435 | 188 | |
duke@435 | 189 | |
duke@435 | 190 | |
duke@435 | 191 | int VtableStub::pd_code_size_limit(bool is_vtable_stub) { |
duke@435 | 192 | if (is_vtable_stub) { |
duke@435 | 193 | // Vtable stub size |
duke@435 | 194 | return (DebugVtables ? 210 : 16) + (CountCompiledCalls ? 6 : 0); |
duke@435 | 195 | } else { |
duke@435 | 196 | // Itable stub size |
jrose@1058 | 197 | return (DebugVtables ? 256 : 66) + (CountCompiledCalls ? 6 : 0); |
duke@435 | 198 | } |
duke@435 | 199 | } |
duke@435 | 200 | |
duke@435 | 201 | int VtableStub::pd_code_alignment() { |
duke@435 | 202 | return wordSize; |
duke@435 | 203 | } |