| /* |
| * Copyright (c) 2016, 2017, 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 "precompiled.hpp" |
| |
| #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 |