| /* |
| * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
| * Copyright 2012, 2014 SAP AG. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "asm/assembler.hpp" |
| #include "asm/macroAssembler.inline.hpp" |
| #include "code/vtableStubs.hpp" |
| #include "interp_masm_ppc_64.hpp" |
| #include "memory/resourceArea.hpp" |
| #include "oops/instanceKlass.hpp" |
| #include "oops/klassVtable.hpp" |
| #include "runtime/sharedRuntime.hpp" |
| #include "vmreg_ppc.inline.hpp" |
| #ifdef COMPILER2 |
| #include "opto/runtime.hpp" |
| #endif |
| |
| #define __ masm-> |
| |
| #ifdef PRODUCT |
| #define BLOCK_COMMENT(str) // nothing |
| #else |
| #define BLOCK_COMMENT(str) __ block_comment(str) |
| #endif |
| #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") |
| |
| #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. |
| VtableStub* VtableStubs::create_vtable_stub(int vtable_index) { |
| // PPC port: use fixed size. |
| const int code_length = VtableStub::pd_code_size_limit(true); |
| VtableStub* s = new (code_length) VtableStub(true, vtable_index); |
| ResourceMark rm; |
| CodeBuffer cb(s->entry_point(), code_length); |
| MacroAssembler* masm = new MacroAssembler(&cb); |
| address start_pc; |
| |
| #ifndef PRODUCT |
| if (CountCompiledCalls) { |
| __ load_const(R11_scratch1, SharedRuntime::nof_megamorphic_calls_addr()); |
| __ lwz(R12_scratch2, 0, R11_scratch1); |
| __ addi(R12_scratch2, R12_scratch2, 1); |
| __ stw(R12_scratch2, 0, R11_scratch1); |
| } |
| #endif |
| |
| assert(VtableStub::receiver_location() == R3_ARG1->as_VMReg(), "receiver expected in R3_ARG1"); |
| |
| // Get receiver klass. |
| const Register rcvr_klass = R11_scratch1; |
| |
| // We might implicit NULL fault here. |
| address npe_addr = __ pc(); // npe = null pointer exception |
| __ load_klass_with_trap_null_check(rcvr_klass, R3); |
| |
| // Set method (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. |
| const Register vtable_len = R12_scratch2; |
| __ lwz(vtable_len, InstanceKlass::vtable_length_offset()*wordSize, rcvr_klass); |
| __ cmpwi(CCR0, vtable_len, vtable_index*vtableEntry::size()); |
| __ bge(CCR0, L); |
| __ li(R12_scratch2, vtable_index); |
| __ call_VM(noreg, CAST_FROM_FN_PTR(address, bad_compiled_vtable_index), R3_ARG1, R12_scratch2, false); |
| __ bind(L); |
| } |
| #endif |
| |
| int v_off = entry_offset*wordSize + vtableEntry::method_offset_in_bytes(); |
| |
| __ ld(R19_method, v_off, rcvr_klass); |
| |
| #ifndef PRODUCT |
| if (DebugVtables) { |
| Label L; |
| __ cmpdi(CCR0, R19_method, 0); |
| __ bne(CCR0, L); |
| __ stop("Vtable entry is ZERO", 102); |
| __ bind(L); |
| } |
| #endif |
| |
| // If the vtable entry is null, the method is abstract. |
| address ame_addr = __ pc(); // ame = abstract method error |
| |
| __ load_with_trap_null_check(R12_scratch2, in_bytes(Method::from_compiled_offset()), R19_method); |
| __ mtctr(R12_scratch2); |
| __ bctr(); |
| masm->flush(); |
| |
| guarantee(__ pc() <= s->code_end(), "overflowed buffer"); |
| |
| s->set_exception_points(npe_addr, ame_addr); |
| |
| return s; |
| } |
| |
| VtableStub* VtableStubs::create_itable_stub(int vtable_index) { |
| // PPC port: use fixed size. |
| const int code_length = VtableStub::pd_code_size_limit(false); |
| VtableStub* s = new (code_length) VtableStub(false, vtable_index); |
| ResourceMark rm; |
| CodeBuffer cb(s->entry_point(), code_length); |
| MacroAssembler* masm = new MacroAssembler(&cb); |
| address start_pc; |
| |
| #ifndef PRODUCT |
| if (CountCompiledCalls) { |
| __ load_const(R11_scratch1, SharedRuntime::nof_megamorphic_calls_addr()); |
| __ lwz(R12_scratch2, 0, R11_scratch1); |
| __ addi(R12_scratch2, R12_scratch2, 1); |
| __ stw(R12_scratch2, 0, R11_scratch1); |
| } |
| #endif |
| |
| assert(VtableStub::receiver_location() == R3_ARG1->as_VMReg(), "receiver expected in R3_ARG1"); |
| |
| // Entry arguments: |
| // R19_method: Interface |
| // R3_ARG1: Receiver |
| // |
| |
| const Register rcvr_klass = R11_scratch1; |
| const Register vtable_len = R12_scratch2; |
| const Register itable_entry_addr = R21_tmp1; |
| const Register itable_interface = R22_tmp2; |
| |
| // Get receiver klass. |
| |
| // We might implicit NULL fault here. |
| address npe_addr = __ pc(); // npe = null pointer exception |
| __ load_klass_with_trap_null_check(rcvr_klass, R3_ARG1); |
| |
| BLOCK_COMMENT("Load start of itable entries into itable_entry."); |
| __ lwz(vtable_len, InstanceKlass::vtable_length_offset() * wordSize, rcvr_klass); |
| __ slwi(vtable_len, vtable_len, exact_log2(vtableEntry::size() * wordSize)); |
| __ add(itable_entry_addr, vtable_len, rcvr_klass); |
| |
| // Loop over all itable entries until desired interfaceOop(Rinterface) found. |
| BLOCK_COMMENT("Increment itable_entry_addr in loop."); |
| const int vtable_base_offset = InstanceKlass::vtable_start_offset() * wordSize; |
| __ addi(itable_entry_addr, itable_entry_addr, vtable_base_offset + itableOffsetEntry::interface_offset_in_bytes()); |
| |
| const int itable_offset_search_inc = itableOffsetEntry::size() * wordSize; |
| Label search; |
| __ bind(search); |
| __ ld(itable_interface, 0, itable_entry_addr); |
| |
| // Handle IncompatibleClassChangeError in itable stubs. |
| // If the entry is NULL then we've reached the end of the table |
| // without finding the expected interface, so throw an exception. |
| BLOCK_COMMENT("Handle IncompatibleClassChangeError in itable stubs."); |
| Label throw_icce; |
| __ cmpdi(CCR1, itable_interface, 0); |
| __ cmpd(CCR0, itable_interface, R19_method); |
| __ addi(itable_entry_addr, itable_entry_addr, itable_offset_search_inc); |
| __ beq(CCR1, throw_icce); |
| __ bne(CCR0, search); |
| |
| // Entry found and itable_entry_addr points to it, get offset of vtable for interface. |
| |
| const Register vtable_offset = R12_scratch2; |
| const Register itable_method = R11_scratch1; |
| |
| const int vtable_offset_offset = (itableOffsetEntry::offset_offset_in_bytes() - |
| itableOffsetEntry::interface_offset_in_bytes()) - |
| itable_offset_search_inc; |
| __ lwz(vtable_offset, vtable_offset_offset, itable_entry_addr); |
| |
| // Compute itableMethodEntry and get method and entry point for compiler. |
| const int method_offset = (itableMethodEntry::size() * wordSize * vtable_index) + |
| itableMethodEntry::method_offset_in_bytes(); |
| |
| __ add(itable_method, rcvr_klass, vtable_offset); |
| __ ld(R19_method, method_offset, itable_method); |
| |
| #ifndef PRODUCT |
| if (DebugVtables) { |
| Label ok; |
| __ cmpd(CCR0, R19_method, 0); |
| __ bne(CCR0, ok); |
| __ stop("method is null", 103); |
| __ bind(ok); |
| } |
| #endif |
| |
| // If the vtable entry is null, the method is abstract. |
| address ame_addr = __ pc(); // ame = abstract method error |
| |
| // Must do an explicit check if implicit checks are disabled. |
| assert(!MacroAssembler::needs_explicit_null_check(in_bytes(Method::from_compiled_offset())), "sanity"); |
| if (!ImplicitNullChecks || !os::zero_page_read_protected()) { |
| if (TrapBasedNullChecks) { |
| __ trap_null_check(R19_method); |
| } else { |
| __ cmpdi(CCR0, R19_method, 0); |
| __ beq(CCR0, throw_icce); |
| } |
| } |
| __ ld(R12_scratch2, in_bytes(Method::from_compiled_offset()), R19_method); |
| __ mtctr(R12_scratch2); |
| __ bctr(); |
| |
| // Handle IncompatibleClassChangeError in itable stubs. |
| // More detailed error message. |
| // We force resolving of the call site by jumping to the "handle |
| // wrong method" stub, and so let the interpreter runtime do all the |
| // dirty work. |
| __ bind(throw_icce); |
| __ load_const(R11_scratch1, SharedRuntime::get_handle_wrong_method_stub()); |
| __ mtctr(R11_scratch1); |
| __ bctr(); |
| |
| 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 { |
| int decode_klass_size = MacroAssembler::instr_size_for_decode_klass_not_null(); |
| if (is_vtable_stub) { |
| return 20 + decode_klass_size + 8 + 8; // Plain + cOops + Traps + safety |
| } else { |
| return 96 + decode_klass_size + 12 + 8; // Plain + cOops + Traps + safety |
| } |
| } |
| } |
| |
| int VtableStub::pd_code_alignment() { |
| const unsigned int icache_line_size = 32; |
| return icache_line_size; |
| } |