Mercurial > hg > graal-compiler
view src/cpu/sparc/vm/vtableStubs_sparc.cpp @ 170:02cc988a9fdc
Merge
author | rasbold |
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date | Fri, 30 May 2008 07:22:22 -0700 |
parents | ba764ed4b6f2 |
children | d1605aabd0a1 |
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/* * Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ #include "incls/_precompiled.incl" #include "incls/_vtableStubs_sparc.cpp.incl" // machine-dependent part of VtableStubs: create vtableStub of correct size and // initialize its code #define __ masm-> #ifndef PRODUCT extern "C" void bad_compiled_vtable_index(JavaThread* thread, oopDesc* receiver, int index); #endif // Used by compiler only; may use only caller saved, non-argument registers // NOTE: %%%% if any change is made to this stub make sure that the function // pd_code_size_limit is changed to ensure the correct size for VtableStub VtableStub* VtableStubs::create_vtable_stub(int vtable_index) { const int sparc_code_length = VtableStub::pd_code_size_limit(true); VtableStub* s = new(sparc_code_length) VtableStub(true, vtable_index); ResourceMark rm; CodeBuffer cb(s->entry_point(), sparc_code_length); MacroAssembler* masm = new MacroAssembler(&cb); #ifndef PRODUCT if (CountCompiledCalls) { Address ctr(G5, SharedRuntime::nof_megamorphic_calls_addr()); __ sethi(ctr); __ ld(ctr, G3_scratch); __ inc(G3_scratch); __ st(G3_scratch, ctr); } #endif /* PRODUCT */ assert(VtableStub::receiver_location() == O0->as_VMReg(), "receiver expected in O0"); // get receiver klass address npe_addr = __ pc(); __ load_klass(O0, G3_scratch); // set methodOop (in case of interpreted method), and destination address int entry_offset = instanceKlass::vtable_start_offset() + vtable_index*vtableEntry::size(); #ifndef PRODUCT if (DebugVtables) { Label L; // check offset vs vtable length __ ld(G3_scratch, instanceKlass::vtable_length_offset()*wordSize, G5); __ cmp(G5, vtable_index*vtableEntry::size()); __ br(Assembler::greaterUnsigned, false, Assembler::pt, L); __ delayed()->nop(); __ set(vtable_index, O2); __ call_VM(noreg, CAST_FROM_FN_PTR(address, bad_compiled_vtable_index), O0, O2); __ bind(L); } #endif int v_off = entry_offset*wordSize + vtableEntry::method_offset_in_bytes(); if( __ is_simm13(v_off) ) { __ ld_ptr(G3, v_off, G5_method); } else { __ set(v_off,G5); __ ld_ptr(G3, G5, G5_method); } #ifndef PRODUCT if (DebugVtables) { Label L; __ br_notnull(G5_method, false, Assembler::pt, L); __ delayed()->nop(); __ stop("Vtable entry is ZERO"); __ bind(L); } #endif address ame_addr = __ pc(); // if the vtable entry is null, the method is abstract // NOTE: for vtable dispatches, the vtable entry will never be null. __ ld_ptr(G5_method, in_bytes(methodOopDesc::from_compiled_offset()), G3_scratch); // jump to target (either compiled code or c2iadapter) __ JMP(G3_scratch, 0); // load methodOop (in case we call c2iadapter) __ delayed()->nop(); masm->flush(); s->set_exception_points(npe_addr, ame_addr); return s; } // NOTE: %%%% if any change is made to this stub make sure that the function // pd_code_size_limit is changed to ensure the correct size for VtableStub VtableStub* VtableStubs::create_itable_stub(int vtable_index) { const int sparc_code_length = VtableStub::pd_code_size_limit(false); VtableStub* s = new(sparc_code_length) VtableStub(false, vtable_index); ResourceMark rm; CodeBuffer cb(s->entry_point(), sparc_code_length); MacroAssembler* masm = new MacroAssembler(&cb); Register G3_klassOop = G3_scratch; Register G5_interface = G5; // Passed in as an argument Label search; // Entry arguments: // G5_interface: Interface // O0: Receiver assert(VtableStub::receiver_location() == O0->as_VMReg(), "receiver expected in O0"); // get receiver klass (also an implicit null-check) address npe_addr = __ pc(); __ load_klass(O0, G3_klassOop); __ verify_oop(G3_klassOop); // Push a new window to get some temp registers. This chops the head of all // my 64-bit %o registers in the LION build, but this is OK because no longs // are passed in the %o registers. Instead, longs are passed in G1 and G4 // and so those registers are not available here. __ save(SP,-frame::register_save_words*wordSize,SP); Register I0_receiver = I0; // Location of receiver after save #ifndef PRODUCT if (CountCompiledCalls) { Address ctr(L0, SharedRuntime::nof_megamorphic_calls_addr()); __ sethi(ctr); __ ld(ctr, L1); __ inc(L1); __ st(L1, ctr); } #endif /* PRODUCT */ // load start of itable entries into L0 register const int base = instanceKlass::vtable_start_offset() * wordSize; __ ld(Address(G3_klassOop, 0, instanceKlass::vtable_length_offset() * wordSize), L0); // %%% Could store the aligned, prescaled offset in the klassoop. __ sll(L0, exact_log2(vtableEntry::size() * wordSize), L0); // see code for instanceKlass::start_of_itable! const int vtable_alignment = align_object_offset(1); assert(vtable_alignment == 1 || vtable_alignment == 2, ""); const int odd_bit = vtableEntry::size() * wordSize; if (vtable_alignment == 2) { __ and3(L0, odd_bit, L1); // isolate the odd bit } __ add(G3_klassOop, L0, L0); if (vtable_alignment == 2) { __ add(L0, L1, L0); // double the odd bit, to align up } // Loop over all itable entries until desired interfaceOop (G5_interface) found __ bind(search); // %%%% Could load both offset and interface in one ldx, if they were // in the opposite order. This would save a load. __ ld_ptr(L0, base + itableOffsetEntry::interface_offset_in_bytes(), L1); // If the entry is NULL then we've reached the end of the table // without finding the expected interface, so throw an exception Label throw_icce; __ bpr(Assembler::rc_z, false, Assembler::pn, L1, throw_icce); __ delayed()->cmp(G5_interface, L1); __ brx(Assembler::notEqual, true, Assembler::pn, search); __ delayed()->add(L0, itableOffsetEntry::size() * wordSize, L0); // entry found and L0 points to it, move offset of vtable for interface into L0 __ ld(L0, base + itableOffsetEntry::offset_offset_in_bytes(), L0); // Compute itableMethodEntry and get methodOop(G5_method) and entrypoint(L0) for compiler const int method_offset = (itableMethodEntry::size() * wordSize * vtable_index) + itableMethodEntry::method_offset_in_bytes(); __ add(G3_klassOop, L0, L1); __ ld_ptr(L1, method_offset, G5_method); #ifndef PRODUCT if (DebugVtables) { Label L01; __ ld_ptr(L1, method_offset, G5_method); __ bpr(Assembler::rc_nz, false, Assembler::pt, G5_method, L01); __ delayed()->nop(); __ stop("methodOop is null"); __ bind(L01); __ verify_oop(G5_method); } #endif // If the following load is through a NULL pointer, we'll take an OS // exception that should translate into an AbstractMethodError. We need the // window count to be correct at that time. __ restore(); // Restore registers BEFORE the AME point address ame_addr = __ pc(); // if the vtable entry is null, the method is abstract __ ld_ptr(G5_method, in_bytes(methodOopDesc::from_compiled_offset()), G3_scratch); // G5_method: methodOop // O0: Receiver // G3_scratch: entry point __ JMP(G3_scratch, 0); __ delayed()->nop(); __ bind(throw_icce); Address icce(G3_scratch, StubRoutines::throw_IncompatibleClassChangeError_entry()); __ jump_to(icce, 0); __ delayed()->restore(); masm->flush(); guarantee(__ pc() <= s->code_end(), "overflowed buffer"); s->set_exception_points(npe_addr, ame_addr); return s; } int VtableStub::pd_code_size_limit(bool is_vtable_stub) { if (TraceJumps || DebugVtables || CountCompiledCalls || VerifyOops) return 1000; else { const int slop = 2*BytesPerInstWord; // sethi;add (needed for long offsets) if (is_vtable_stub) { // ld;ld;ld,jmp,nop const int basic = 5*BytesPerInstWord + // shift;add for load_klass (UseCompressedOops ? 2*BytesPerInstWord : 0); return basic + slop; } else { // save, ld, ld, sll, and, add, add, ld, cmp, br, add, ld, add, ld, ld, jmp, restore, sethi, jmpl, restore const int basic = (20 LP64_ONLY(+ 6)) * BytesPerInstWord + // shift;add for load_klass (UseCompressedOops ? 2*BytesPerInstWord : 0); return (basic + slop); } } } int VtableStub::pd_code_alignment() { // UltraSPARC cache line size is 8 instructions: const unsigned int icache_line_size = 32; return icache_line_size; }