author | mgronlun |
Tue, 29 Oct 2019 11:33:25 +0100 | |
changeset 58836 | 31ec3e55fa3d |
parent 58505 | c16f3a24a6fc |
permissions | -rw-r--r-- |
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1 |
/* |
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* Copyright (c) 1997, 2019, 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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*/ |
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|
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#include "precompiled.hpp" |
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#include "asm/macroAssembler.inline.hpp" |
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#include "code/codeCache.hpp" |
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#include "code/compiledIC.hpp" |
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#include "code/icBuffer.hpp" |
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#include "code/nmethod.hpp" |
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#include "memory/resourceArea.hpp" |
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#include "runtime/mutexLocker.hpp" |
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#include "runtime/safepoint.hpp" |
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|
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// ---------------------------------------------------------------------------- |
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|
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#define __ _masm. |
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address CompiledStaticCall::emit_to_interp_stub(CodeBuffer &cbuf, address mark) { |
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// Stub is fixed up when the corresponding call is converted from |
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// calling compiled code to calling interpreted code. |
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// movq rbx, 0 |
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// jmp -5 # to self |
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|
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if (mark == NULL) { |
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mark = cbuf.insts_mark(); // Get mark within main instrs section. |
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} |
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|
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// Note that the code buffer's insts_mark is always relative to insts. |
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// That's why we must use the macroassembler to generate a stub. |
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MacroAssembler _masm(&cbuf); |
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|
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address base = __ start_a_stub(to_interp_stub_size()); |
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if (base == NULL) { |
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return NULL; // CodeBuffer::expand failed. |
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} |
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// Static stub relocation stores the instruction address of the call. |
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__ relocate(static_stub_Relocation::spec(mark, false), Assembler::imm_operand); |
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// Static stub relocation also tags the Method* in the code-stream. |
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__ mov_metadata(rbx, (Metadata*) NULL); // Method is zapped till fixup time. |
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// This is recognized as unresolved by relocs/nativeinst/ic code. |
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__ jump(RuntimeAddress(__ pc())); |
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assert(__ pc() - base <= to_interp_stub_size(), "wrong stub size"); |
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|
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// Update current stubs pointer and restore insts_end. |
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__ end_a_stub(); |
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return base; |
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} |
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#undef __ |
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|
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int CompiledStaticCall::to_interp_stub_size() { |
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return NOT_LP64(10) // movl; jmp |
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LP64_ONLY(15); // movq (1+1+8); jmp (1+4) |
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} |
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int CompiledStaticCall::to_trampoline_stub_size() { |
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// x86 doesn't use trampolines. |
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return 0; |
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} |
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||
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// Relocation entries for call stub, compiled java to interpreter. |
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int CompiledStaticCall::reloc_to_interp_stub() { |
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return 4; // 3 in emit_to_interp_stub + 1 in emit_call |
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} |
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#if INCLUDE_AOT |
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#define __ _masm. |
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void CompiledStaticCall::emit_to_aot_stub(CodeBuffer &cbuf, address mark) { |
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if (!UseAOT) { |
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return; |
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} |
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// Stub is fixed up when the corresponding call is converted from |
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// calling compiled code to calling aot code. |
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// movq rax, imm64_aot_code_address |
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// jmp rax |
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||
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if (mark == NULL) { |
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mark = cbuf.insts_mark(); // Get mark within main instrs section. |
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} |
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||
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// Note that the code buffer's insts_mark is always relative to insts. |
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// That's why we must use the macroassembler to generate a stub. |
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MacroAssembler _masm(&cbuf); |
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address base = |
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__ start_a_stub(to_aot_stub_size()); |
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guarantee(base != NULL, "out of space"); |
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||
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// Static stub relocation stores the instruction address of the call. |
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__ relocate(static_stub_Relocation::spec(mark, true /* is_aot */), Assembler::imm_operand); |
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// Load destination AOT code address. |
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#ifdef _LP64 |
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__ mov64(rax, CONST64(0)); // address is zapped till fixup time. |
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#else |
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__ movl(rax, 0); // address is zapped till fixup time. |
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#endif |
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// This is recognized as unresolved by relocs/nativeinst/ic code. |
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__ jmp(rax); |
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assert(__ pc() - base <= to_aot_stub_size(), "wrong stub size"); |
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||
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// Update current stubs pointer and restore insts_end. |
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__ end_a_stub(); |
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} |
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#undef __ |
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||
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int CompiledStaticCall::to_aot_stub_size() { |
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if (UseAOT) { |
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return NOT_LP64(7) // movl; jmp |
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LP64_ONLY(12); // movq (1+1+8); jmp (2) |
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} else { |
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return 0; |
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} |
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} |
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// Relocation entries for call stub, compiled java to aot. |
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int CompiledStaticCall::reloc_to_aot_stub() { |
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if (UseAOT) { |
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return 2; // 1 in emit_to_aot_stub + 1 in emit_call |
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} else { |
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return 0; |
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} |
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} |
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#endif // INCLUDE_AOT |
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||
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void CompiledDirectStaticCall::set_to_interpreted(const methodHandle& callee, address entry) { |
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address stub = find_stub(false /* is_aot */); |
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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_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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|
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// Creation also verifies the object. |
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NativeMovConstReg* method_holder = nativeMovConstReg_at(stub); |
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NativeJump* jump = nativeJump_at(method_holder->next_instruction_address()); |
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verify_mt_safe(callee, entry, method_holder, jump); |
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|
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// Update stub. |
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method_holder->set_data((intptr_t)callee()); |
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jump->set_jump_destination(entry); |
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|
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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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|
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void CompiledDirectStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) { |
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assert(CompiledICLocker::is_safe(static_stub->addr()), "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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NativeMovConstReg* method_holder = nativeMovConstReg_at(stub); |
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method_holder->set_data(0); |
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if (!static_stub->is_aot()) { |
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NativeJump* jump = nativeJump_at(method_holder->next_instruction_address()); |
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jump->set_jump_destination((address)-1); |
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} |
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} |
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//----------------------------------------------------------------------------- |
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// Non-product mode code |
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#ifndef PRODUCT |
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void CompiledDirectStaticCall::verify() { |
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// Verify call. |
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_call->verify(); |
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_call->verify_alignment(); |
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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(), "CompiledDirectStaticCall cannot be used on AOTCompiledMethod"); |
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#endif |
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||
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// Verify stub. |
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address stub = find_stub(false /* is_aot */); |
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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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NativeMovConstReg* method_holder = nativeMovConstReg_at(stub); |
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NativeJump* jump = nativeJump_at(method_holder->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 |