--- /dev/null 2016-11-03 14:17:02.000000000 -0700 +++ new/src/cpu/x86/vm/compiledIC_aot_x86_64.cpp 2016-11-03 14:17:02.000000000 -0700 @@ -0,0 +1,120 @@ +/* + * Copyright (c) 2016, Oracle and/or its affiliates. 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 "aot/compiledIC_aot.hpp" +#include "code/codeCache.hpp" +#include "memory/resourceArea.hpp" + +void CompiledDirectStaticCall::set_to_far(const methodHandle& callee, address entry) { + address stub = find_stub(true /* is_far */); + guarantee(stub != NULL, "stub not found"); + + if (TraceICs) { + ResourceMark rm; + tty->print_cr("CompiledDirectStaticCall@" INTPTR_FORMAT ": set_to_far %s", + p2i(instruction_address()), + callee->name_and_sig_as_C_string()); + } + + // Creation also verifies the object. + // mov rax,imm_aot_addr + // jmp rax + NativeMovConstReg* destination_holder = nativeMovConstReg_at(stub); + +#ifdef ASSERT + // read the value once + intptr_t data = destination_holder->data(); + assert(data == 0 || data == (intptr_t)entry, + "MT-unsafe modification of inline cache"); +#endif + + // Update stub. + destination_holder->set_data((intptr_t)entry); + + // Update jump to call. + set_destination_mt_safe(stub); +} + +void CompiledPltStaticCall::set_to_interpreted(const methodHandle& callee, address entry) { + address stub = find_stub(); + guarantee(stub != NULL, "stub not found"); + if (TraceICs) { + ResourceMark rm; + tty->print_cr("CompiledPltStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s", + p2i(instruction_address()), + callee->name_and_sig_as_C_string()); + } + + // Creation also verifies the object. + NativeLoadGot* method_loader = nativeLoadGot_at(stub); + NativeGotJump* jump = nativeGotJump_at(method_loader->next_instruction_address()); + + intptr_t data = method_loader->data(); + address destination = jump->destination(); + assert(data == 0 || data == (intptr_t)callee(), + "a) MT-unsafe modification of inline cache"); + assert(destination == (address)-1 || destination == entry, + "b) MT-unsafe modification of inline cache"); + + // Update stub. + method_loader->set_data((intptr_t)callee()); + jump->set_jump_destination(entry); + + // Update jump to call. + set_destination_mt_safe(stub); +} + +#ifdef NEVER_CALLED +void CompiledPltStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) { + assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call"); + // Reset stub. + address stub = static_stub->addr(); + assert(stub != NULL, "stub not found"); + // Creation also verifies the object. + NativeLoadGot* method_loader = nativeLoadGot_at(stub); + NativeGotJump* jump = nativeGotJump_at(method_loader->next_instruction_address()); + method_loader->set_data(0); + jump->set_jump_destination((address)-1); +} +#endif + +#ifndef PRODUCT +void CompiledPltStaticCall::verify() { + // Verify call. + _call->verify(); + +#ifdef ASSERT + CodeBlob *cb = CodeCache::find_blob_unsafe((address) _call); + assert(cb && cb->is_aot(), "CompiledPltStaticCall can only be used on AOTCompiledMethod"); +#endif + + // Verify stub. + address stub = find_stub(); + assert(stub != NULL, "no stub found for static call"); + // Creation also verifies the object. + NativeLoadGot* method_loader = nativeLoadGot_at(stub); + NativeGotJump* jump = nativeGotJump_at(method_loader->next_instruction_address()); + // Verify state. + assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted(), "sanity check"); +} +#endif // !PRODUCT