123 lines
4.3 KiB
C++
123 lines
4.3 KiB
C++
/*
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* Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include "precompiled.hpp"
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#include "aot/compiledIC_aot.hpp"
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#include "code/codeCache.hpp"
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#include "memory/resourceArea.hpp"
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void CompiledDirectStaticCall::set_to_far(const methodHandle& callee, address entry) {
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address stub = find_stub(true /* is_far */);
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guarantee(stub != NULL, "stub not found");
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if (TraceICs) {
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ResourceMark rm;
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tty->print_cr("CompiledDirectStaticCall@" INTPTR_FORMAT ": set_to_far %s",
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p2i(instruction_address()),
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callee->name_and_sig_as_C_string());
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}
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// Creation also verifies the object.
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// mov rax,imm_aot_addr
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// jmp rax
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NativeMovConstReg* destination_holder = nativeMovConstReg_at(stub);
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#ifdef ASSERT
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// read the value once
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intptr_t data = destination_holder->data();
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assert(data == 0 || data == (intptr_t)entry,
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"MT-unsafe modification of inline cache");
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#endif
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// Update stub.
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destination_holder->set_data((intptr_t)entry);
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// Update jump to call.
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set_destination_mt_safe(stub);
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}
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void CompiledPltStaticCall::set_to_interpreted(const methodHandle& callee, address entry) {
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address stub = find_stub();
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guarantee(stub != NULL, "stub not found");
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if (TraceICs) {
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ResourceMark rm;
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tty->print_cr("CompiledPltStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s",
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p2i(instruction_address()),
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callee->name_and_sig_as_C_string());
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}
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// Creation also verifies the object.
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NativeLoadGot* method_loader = nativeLoadGot_at(stub);
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NativeGotJump* jump = nativeGotJump_at(method_loader->next_instruction_address());
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intptr_t data = method_loader->data();
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address destination = jump->destination();
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assert(data == 0 || data == (intptr_t)callee(),
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"a) MT-unsafe modification of inline cache");
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assert(destination == (address)-1 || destination == entry,
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"b) MT-unsafe modification of inline cache");
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// Update stub.
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method_loader->set_data((intptr_t)callee());
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jump->set_jump_destination(entry);
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// Update jump to call.
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set_destination_mt_safe(stub);
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}
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#ifdef NEVER_CALLED
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void CompiledPltStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) {
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assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
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// Reset stub.
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address stub = static_stub->addr();
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assert(stub != NULL, "stub not found");
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// Creation also verifies the object.
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NativeLoadGot* method_loader = nativeLoadGot_at(stub);
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NativeGotJump* jump = nativeGotJump_at(method_loader->next_instruction_address());
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method_loader->set_data(0);
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jump->set_jump_destination((address)-1);
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}
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#endif
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#ifndef PRODUCT
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void CompiledPltStaticCall::verify() {
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// Verify call.
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_call->verify();
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#ifdef ASSERT
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CodeBlob *cb = CodeCache::find_blob_unsafe((address) _call);
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assert(cb && cb->is_aot(), "CompiledPltStaticCall can only be used on AOTCompiledMethod");
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#endif
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// Verify stub.
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address stub = find_stub();
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assert(stub != NULL, "no stub found for static call");
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// Creation also verifies the object.
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NativeLoadGot* method_loader = nativeLoadGot_at(stub);
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NativeGotJump* jump = nativeGotJump_at(method_loader->next_instruction_address());
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// Verify state.
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assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted(), "sanity check");
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}
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#endif // !PRODUCT
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