diff -r d41bb2dcaeb8 -r 8764956ec928 hotspot/src/cpu/aarch64/vm/metaspaceShared_aarch64.cpp --- a/hotspot/src/cpu/aarch64/vm/metaspaceShared_aarch64.cpp Fri Mar 10 12:58:37 2017 -0500 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,126 +0,0 @@ -/* - * Copyright (c) 2004, 2012, Oracle and/or its affiliates. All rights reserved. - * Copyright (c) 2014, Red Hat 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 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/macroAssembler.hpp" -#include "memory/metaspaceShared.hpp" - -// Generate the self-patching vtable method: -// -// This method will be called (as any other Klass virtual method) with -// the Klass itself as the first argument. Example: -// -// oop obj; -// int size = obj->klass()->oop_size(this); -// -// for which the virtual method call is Klass::oop_size(); -// -// The dummy method is called with the Klass object as the first -// operand, and an object as the second argument. -// - -//===================================================================== - -// All of the dummy methods in the vtable are essentially identical, -// differing only by an ordinal constant, and they bear no relationship -// to the original method which the caller intended. Also, there needs -// to be 'vtbl_list_size' instances of the vtable in order to -// differentiate between the 'vtable_list_size' original Klass objects. - -#define __ masm-> - -extern "C" { - void aarch64_prolog(void); -} - -void MetaspaceShared::generate_vtable_methods(void** vtbl_list, - void** vtable, - char** md_top, - char* md_end, - char** mc_top, - char* mc_end) { - -#ifdef BUILTIN_SIM - // Write a dummy word to the writable shared metaspace. - // MetaspaceShared::initialize_shared_spaces will fill it with the - // address of aarch64_prolog(). - address *prolog_ptr = (address*)*md_top; - *(intptr_t *)(*md_top) = (intptr_t)0; - (*md_top) += sizeof(intptr_t); -#endif - - intptr_t vtable_bytes = (num_virtuals * vtbl_list_size) * sizeof(void*); - *(intptr_t *)(*md_top) = vtable_bytes; - *md_top += sizeof(intptr_t); - void** dummy_vtable = (void**)*md_top; - *vtable = dummy_vtable; - *md_top += vtable_bytes; - - // Get ready to generate dummy methods. - - CodeBuffer cb((unsigned char*)*mc_top, mc_end - *mc_top); - MacroAssembler* masm = new MacroAssembler(&cb); - - Label common_code; - for (int i = 0; i < vtbl_list_size; ++i) { - for (int j = 0; j < num_virtuals; ++j) { - dummy_vtable[num_virtuals * i + j] = (void*)masm->pc(); - - // We're called directly from C code. -#ifdef BUILTIN_SIM - __ c_stub_prolog(8, 0, MacroAssembler::ret_type_integral, prolog_ptr); -#endif - // Load rscratch1 with a value indicating vtable/offset pair. - // -- bits[ 7..0] (8 bits) which virtual method in table? - // -- bits[12..8] (5 bits) which virtual method table? - __ mov(rscratch1, (i << 8) + j); - __ b(common_code); - } - } - - __ bind(common_code); - - Register tmp0 = r10, tmp1 = r11; // AAPCS64 temporary registers - __ enter(); - __ lsr(tmp0, rscratch1, 8); // isolate vtable identifier. - __ mov(tmp1, (address)vtbl_list); // address of list of vtable pointers. - __ ldr(tmp1, Address(tmp1, tmp0, Address::lsl(LogBytesPerWord))); // get correct vtable pointer. - __ str(tmp1, Address(c_rarg0)); // update vtable pointer in obj. - __ add(rscratch1, tmp1, rscratch1, ext::uxtb, LogBytesPerWord); // address of real method pointer. - __ ldr(rscratch1, Address(rscratch1)); // get real method pointer. - __ blrt(rscratch1, 8, 0, 1); // jump to the real method. - __ leave(); - __ ret(lr); - - *mc_top = (char*)__ pc(); -} - -#ifdef BUILTIN_SIM -void MetaspaceShared::relocate_vtbl_list(char **buffer) { - void **sim_entry = (void**)*buffer; - *sim_entry = (void*)aarch64_prolog; - *buffer += sizeof(intptr_t); -} -#endif