2c2c007448
Reviewed-by: kvn
1955 lines
73 KiB
C++
1955 lines
73 KiB
C++
/*
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* Copyright (c) 1997, 2012, 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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#include "precompiled.hpp"
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#include "asm/macroAssembler.hpp"
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#include "interpreter/bytecodeHistogram.hpp"
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#include "interpreter/interpreter.hpp"
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#include "interpreter/interpreterGenerator.hpp"
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#include "interpreter/interpreterRuntime.hpp"
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#include "interpreter/templateTable.hpp"
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#include "oops/arrayOop.hpp"
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#include "oops/methodData.hpp"
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#include "oops/method.hpp"
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#include "oops/oop.inline.hpp"
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#include "prims/jvmtiExport.hpp"
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#include "prims/jvmtiThreadState.hpp"
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#include "runtime/arguments.hpp"
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#include "runtime/deoptimization.hpp"
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#include "runtime/frame.inline.hpp"
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#include "runtime/sharedRuntime.hpp"
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#include "runtime/stubRoutines.hpp"
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#include "runtime/synchronizer.hpp"
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#include "runtime/timer.hpp"
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#include "runtime/vframeArray.hpp"
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#include "utilities/debug.hpp"
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#define __ _masm->
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#ifndef CC_INTERP
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const int method_offset = frame::interpreter_frame_method_offset * wordSize;
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const int bci_offset = frame::interpreter_frame_bcx_offset * wordSize;
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const int locals_offset = frame::interpreter_frame_locals_offset * wordSize;
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//------------------------------------------------------------------------------------------------------------------------
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address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
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address entry = __ pc();
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// Note: There should be a minimal interpreter frame set up when stack
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// overflow occurs since we check explicitly for it now.
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//
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#ifdef ASSERT
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{ Label L;
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__ lea(rax, Address(rbp,
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frame::interpreter_frame_monitor_block_top_offset * wordSize));
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__ cmpptr(rax, rsp); // rax, = maximal rsp for current rbp,
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// (stack grows negative)
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__ jcc(Assembler::aboveEqual, L); // check if frame is complete
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__ stop ("interpreter frame not set up");
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__ bind(L);
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}
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#endif // ASSERT
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// Restore bcp under the assumption that the current frame is still
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// interpreted
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__ restore_bcp();
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// expression stack must be empty before entering the VM if an exception
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// happened
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__ empty_expression_stack();
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__ empty_FPU_stack();
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// throw exception
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__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_StackOverflowError));
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return entry;
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}
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address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(const char* name) {
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address entry = __ pc();
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// expression stack must be empty before entering the VM if an exception happened
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__ empty_expression_stack();
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__ empty_FPU_stack();
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// setup parameters
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// ??? convention: expect aberrant index in register rbx,
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__ lea(rax, ExternalAddress((address)name));
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__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException), rax, rbx);
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return entry;
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}
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address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
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address entry = __ pc();
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// object is at TOS
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__ pop(rax);
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// expression stack must be empty before entering the VM if an exception
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// happened
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__ empty_expression_stack();
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__ empty_FPU_stack();
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__ call_VM(noreg,
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CAST_FROM_FN_PTR(address,
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InterpreterRuntime::throw_ClassCastException),
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rax);
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return entry;
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}
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address TemplateInterpreterGenerator::generate_exception_handler_common(const char* name, const char* message, bool pass_oop) {
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assert(!pass_oop || message == NULL, "either oop or message but not both");
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address entry = __ pc();
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if (pass_oop) {
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// object is at TOS
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__ pop(rbx);
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}
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// expression stack must be empty before entering the VM if an exception happened
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__ empty_expression_stack();
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__ empty_FPU_stack();
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// setup parameters
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__ lea(rax, ExternalAddress((address)name));
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if (pass_oop) {
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__ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_klass_exception), rax, rbx);
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} else {
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if (message != NULL) {
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__ lea(rbx, ExternalAddress((address)message));
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} else {
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__ movptr(rbx, NULL_WORD);
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}
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__ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), rax, rbx);
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}
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// throw exception
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__ jump(ExternalAddress(Interpreter::throw_exception_entry()));
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return entry;
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}
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address TemplateInterpreterGenerator::generate_continuation_for(TosState state) {
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address entry = __ pc();
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// NULL last_sp until next java call
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__ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
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__ dispatch_next(state);
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return entry;
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}
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address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step) {
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TosState incoming_state = state;
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address entry = __ pc();
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#ifdef COMPILER2
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// The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases
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if ((incoming_state == ftos && UseSSE < 1) || (incoming_state == dtos && UseSSE < 2)) {
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for (int i = 1; i < 8; i++) {
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__ ffree(i);
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}
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} else if (UseSSE < 2) {
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__ empty_FPU_stack();
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}
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#endif
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if ((incoming_state == ftos && UseSSE < 1) || (incoming_state == dtos && UseSSE < 2)) {
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__ MacroAssembler::verify_FPU(1, "generate_return_entry_for compiled");
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} else {
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__ MacroAssembler::verify_FPU(0, "generate_return_entry_for compiled");
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}
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// In SSE mode, interpreter returns FP results in xmm0 but they need
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// to end up back on the FPU so it can operate on them.
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if (incoming_state == ftos && UseSSE >= 1) {
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__ subptr(rsp, wordSize);
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__ movflt(Address(rsp, 0), xmm0);
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__ fld_s(Address(rsp, 0));
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__ addptr(rsp, wordSize);
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} else if (incoming_state == dtos && UseSSE >= 2) {
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__ subptr(rsp, 2*wordSize);
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__ movdbl(Address(rsp, 0), xmm0);
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__ fld_d(Address(rsp, 0));
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__ addptr(rsp, 2*wordSize);
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}
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__ MacroAssembler::verify_FPU(state == ftos || state == dtos ? 1 : 0, "generate_return_entry_for in interpreter");
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// Restore stack bottom in case i2c adjusted stack
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__ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
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// and NULL it as marker that rsp is now tos until next java call
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__ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
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__ restore_bcp();
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__ restore_locals();
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Label L_got_cache, L_giant_index;
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if (EnableInvokeDynamic) {
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__ cmpb(Address(rsi, 0), Bytecodes::_invokedynamic);
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__ jcc(Assembler::equal, L_giant_index);
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}
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__ get_cache_and_index_at_bcp(rbx, rcx, 1, sizeof(u2));
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__ bind(L_got_cache);
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__ movl(rbx, Address(rbx, rcx,
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Address::times_ptr, ConstantPoolCache::base_offset() +
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ConstantPoolCacheEntry::flags_offset()));
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__ andptr(rbx, 0xFF);
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__ lea(rsp, Address(rsp, rbx, Interpreter::stackElementScale()));
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__ dispatch_next(state, step);
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// out of the main line of code...
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if (EnableInvokeDynamic) {
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__ bind(L_giant_index);
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__ get_cache_and_index_at_bcp(rbx, rcx, 1, sizeof(u4));
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__ jmp(L_got_cache);
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}
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return entry;
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}
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address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step) {
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address entry = __ pc();
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// In SSE mode, FP results are in xmm0
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if (state == ftos && UseSSE > 0) {
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__ subptr(rsp, wordSize);
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__ movflt(Address(rsp, 0), xmm0);
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__ fld_s(Address(rsp, 0));
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__ addptr(rsp, wordSize);
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} else if (state == dtos && UseSSE >= 2) {
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__ subptr(rsp, 2*wordSize);
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__ movdbl(Address(rsp, 0), xmm0);
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__ fld_d(Address(rsp, 0));
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__ addptr(rsp, 2*wordSize);
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}
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__ MacroAssembler::verify_FPU(state == ftos || state == dtos ? 1 : 0, "generate_deopt_entry_for in interpreter");
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// The stack is not extended by deopt but we must NULL last_sp as this
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// entry is like a "return".
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__ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
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__ restore_bcp();
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__ restore_locals();
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// handle exceptions
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{ Label L;
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const Register thread = rcx;
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__ get_thread(thread);
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__ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD);
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__ jcc(Assembler::zero, L);
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__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception));
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__ should_not_reach_here();
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__ bind(L);
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}
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__ dispatch_next(state, step);
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return entry;
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}
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int AbstractInterpreter::BasicType_as_index(BasicType type) {
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int i = 0;
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switch (type) {
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case T_BOOLEAN: i = 0; break;
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case T_CHAR : i = 1; break;
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case T_BYTE : i = 2; break;
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case T_SHORT : i = 3; break;
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case T_INT : // fall through
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case T_LONG : // fall through
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case T_VOID : i = 4; break;
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case T_FLOAT : i = 5; break; // have to treat float and double separately for SSE
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case T_DOUBLE : i = 6; break;
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case T_OBJECT : // fall through
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case T_ARRAY : i = 7; break;
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default : ShouldNotReachHere();
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}
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assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, "index out of bounds");
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return i;
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}
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address TemplateInterpreterGenerator::generate_result_handler_for(BasicType type) {
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address entry = __ pc();
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switch (type) {
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case T_BOOLEAN: __ c2bool(rax); break;
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case T_CHAR : __ andptr(rax, 0xFFFF); break;
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case T_BYTE : __ sign_extend_byte (rax); break;
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case T_SHORT : __ sign_extend_short(rax); break;
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case T_INT : /* nothing to do */ break;
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case T_DOUBLE :
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case T_FLOAT :
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{ const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp();
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__ pop(t); // remove return address first
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// Must return a result for interpreter or compiler. In SSE
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// mode, results are returned in xmm0 and the FPU stack must
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// be empty.
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if (type == T_FLOAT && UseSSE >= 1) {
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// Load ST0
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__ fld_d(Address(rsp, 0));
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// Store as float and empty fpu stack
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__ fstp_s(Address(rsp, 0));
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// and reload
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__ movflt(xmm0, Address(rsp, 0));
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} else if (type == T_DOUBLE && UseSSE >= 2 ) {
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__ movdbl(xmm0, Address(rsp, 0));
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} else {
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// restore ST0
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__ fld_d(Address(rsp, 0));
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}
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// and pop the temp
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__ addptr(rsp, 2 * wordSize);
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__ push(t); // restore return address
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}
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break;
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case T_OBJECT :
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// retrieve result from frame
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__ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize));
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// and verify it
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__ verify_oop(rax);
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break;
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default : ShouldNotReachHere();
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}
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__ ret(0); // return from result handler
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return entry;
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}
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address TemplateInterpreterGenerator::generate_safept_entry_for(TosState state, address runtime_entry) {
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address entry = __ pc();
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__ push(state);
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__ call_VM(noreg, runtime_entry);
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__ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
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return entry;
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}
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// Helpers for commoning out cases in the various type of method entries.
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//
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// increment invocation count & check for overflow
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//
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// Note: checking for negative value instead of overflow
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// so we have a 'sticky' overflow test
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//
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// rbx,: method
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// rcx: invocation counter
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//
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void InterpreterGenerator::generate_counter_incr(Label* overflow, Label* profile_method, Label* profile_method_continue) {
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const Address invocation_counter(rbx, in_bytes(Method::invocation_counter_offset()) +
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in_bytes(InvocationCounter::counter_offset()));
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// Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not.
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if (TieredCompilation) {
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int increment = InvocationCounter::count_increment;
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int mask = ((1 << Tier0InvokeNotifyFreqLog) - 1) << InvocationCounter::count_shift;
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Label no_mdo, done;
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if (ProfileInterpreter) {
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// Are we profiling?
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__ movptr(rax, Address(rbx, Method::method_data_offset()));
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__ testptr(rax, rax);
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__ jccb(Assembler::zero, no_mdo);
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// Increment counter in the MDO
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const Address mdo_invocation_counter(rax, in_bytes(MethodData::invocation_counter_offset()) +
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in_bytes(InvocationCounter::counter_offset()));
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__ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rcx, false, Assembler::zero, overflow);
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__ jmpb(done);
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}
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__ bind(no_mdo);
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// Increment counter in Method* (we don't need to load it, it's in rcx).
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__ increment_mask_and_jump(invocation_counter, increment, mask, rcx, true, Assembler::zero, overflow);
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__ bind(done);
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} else {
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const Address backedge_counter (rbx, Method::backedge_counter_offset() +
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InvocationCounter::counter_offset());
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if (ProfileInterpreter) { // %%% Merge this into MethodData*
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__ incrementl(Address(rbx,Method::interpreter_invocation_counter_offset()));
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}
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// Update standard invocation counters
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__ movl(rax, backedge_counter); // load backedge counter
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__ incrementl(rcx, InvocationCounter::count_increment);
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__ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits
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__ movl(invocation_counter, rcx); // save invocation count
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__ addl(rcx, rax); // add both counters
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// profile_method is non-null only for interpreted method so
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// profile_method != NULL == !native_call
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// BytecodeInterpreter only calls for native so code is elided.
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if (ProfileInterpreter && profile_method != NULL) {
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// Test to see if we should create a method data oop
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__ cmp32(rcx,
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ExternalAddress((address)&InvocationCounter::InterpreterProfileLimit));
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__ jcc(Assembler::less, *profile_method_continue);
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// if no method data exists, go to profile_method
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__ test_method_data_pointer(rax, *profile_method);
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}
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__ cmp32(rcx,
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ExternalAddress((address)&InvocationCounter::InterpreterInvocationLimit));
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__ jcc(Assembler::aboveEqual, *overflow);
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}
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}
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void InterpreterGenerator::generate_counter_overflow(Label* do_continue) {
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// Asm interpreter on entry
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// rdi - locals
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// rsi - bcp
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// rbx, - method
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// rdx - cpool
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// rbp, - interpreter frame
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// C++ interpreter on entry
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// rsi - new interpreter state pointer
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// rbp - interpreter frame pointer
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// rbx - method
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// On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
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// rbx, - method
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// rcx - rcvr (assuming there is one)
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// top of stack return address of interpreter caller
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// rsp - sender_sp
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// C++ interpreter only
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// rsi - previous interpreter state pointer
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const Address size_of_parameters(rbx, Method::size_of_parameters_offset());
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// InterpreterRuntime::frequency_counter_overflow takes one argument
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// indicating if the counter overflow occurs at a backwards branch (non-NULL bcp).
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// The call returns the address of the verified entry point for the method or NULL
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// if the compilation did not complete (either went background or bailed out).
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__ movptr(rax, (intptr_t)false);
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__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), rax);
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__ movptr(rbx, Address(rbp, method_offset)); // restore Method*
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// Preserve invariant that rsi/rdi contain bcp/locals of sender frame
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// and jump to the interpreted entry.
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__ jmp(*do_continue, relocInfo::none);
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}
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void InterpreterGenerator::generate_stack_overflow_check(void) {
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// see if we've got enough room on the stack for locals plus overhead.
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// the expression stack grows down incrementally, so the normal guard
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// page mechanism will work for that.
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//
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// Registers live on entry:
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//
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// Asm interpreter
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// rdx: number of additional locals this frame needs (what we must check)
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// rbx,: Method*
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// destroyed on exit
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// rax,
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// NOTE: since the additional locals are also always pushed (wasn't obvious in
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// generate_method_entry) so the guard should work for them too.
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//
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// monitor entry size: see picture of stack set (generate_method_entry) and frame_x86.hpp
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const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
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// total overhead size: entry_size + (saved rbp, thru expr stack bottom).
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// be sure to change this if you add/subtract anything to/from the overhead area
|
|
const int overhead_size = -(frame::interpreter_frame_initial_sp_offset*wordSize) + entry_size;
|
|
|
|
const int page_size = os::vm_page_size();
|
|
|
|
Label after_frame_check;
|
|
|
|
// see if the frame is greater than one page in size. If so,
|
|
// then we need to verify there is enough stack space remaining
|
|
// for the additional locals.
|
|
__ cmpl(rdx, (page_size - overhead_size)/Interpreter::stackElementSize);
|
|
__ jcc(Assembler::belowEqual, after_frame_check);
|
|
|
|
// compute rsp as if this were going to be the last frame on
|
|
// the stack before the red zone
|
|
|
|
Label after_frame_check_pop;
|
|
|
|
__ push(rsi);
|
|
|
|
const Register thread = rsi;
|
|
|
|
__ get_thread(thread);
|
|
|
|
const Address stack_base(thread, Thread::stack_base_offset());
|
|
const Address stack_size(thread, Thread::stack_size_offset());
|
|
|
|
// locals + overhead, in bytes
|
|
__ lea(rax, Address(noreg, rdx, Interpreter::stackElementScale(), overhead_size));
|
|
|
|
#ifdef ASSERT
|
|
Label stack_base_okay, stack_size_okay;
|
|
// verify that thread stack base is non-zero
|
|
__ cmpptr(stack_base, (int32_t)NULL_WORD);
|
|
__ jcc(Assembler::notEqual, stack_base_okay);
|
|
__ stop("stack base is zero");
|
|
__ bind(stack_base_okay);
|
|
// verify that thread stack size is non-zero
|
|
__ cmpptr(stack_size, 0);
|
|
__ jcc(Assembler::notEqual, stack_size_okay);
|
|
__ stop("stack size is zero");
|
|
__ bind(stack_size_okay);
|
|
#endif
|
|
|
|
// Add stack base to locals and subtract stack size
|
|
__ addptr(rax, stack_base);
|
|
__ subptr(rax, stack_size);
|
|
|
|
// Use the maximum number of pages we might bang.
|
|
const int max_pages = StackShadowPages > (StackRedPages+StackYellowPages) ? StackShadowPages :
|
|
(StackRedPages+StackYellowPages);
|
|
__ addptr(rax, max_pages * page_size);
|
|
|
|
// check against the current stack bottom
|
|
__ cmpptr(rsp, rax);
|
|
__ jcc(Assembler::above, after_frame_check_pop);
|
|
|
|
__ pop(rsi); // get saved bcp / (c++ prev state ).
|
|
|
|
// Restore sender's sp as SP. This is necessary if the sender's
|
|
// frame is an extended compiled frame (see gen_c2i_adapter())
|
|
// and safer anyway in case of JSR292 adaptations.
|
|
|
|
__ pop(rax); // return address must be moved if SP is changed
|
|
__ mov(rsp, rsi);
|
|
__ push(rax);
|
|
|
|
// Note: the restored frame is not necessarily interpreted.
|
|
// Use the shared runtime version of the StackOverflowError.
|
|
assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated");
|
|
__ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry()));
|
|
// all done with frame size check
|
|
__ bind(after_frame_check_pop);
|
|
__ pop(rsi);
|
|
|
|
__ bind(after_frame_check);
|
|
}
|
|
|
|
// Allocate monitor and lock method (asm interpreter)
|
|
// rbx, - Method*
|
|
//
|
|
void InterpreterGenerator::lock_method(void) {
|
|
// synchronize method
|
|
const Address access_flags (rbx, Method::access_flags_offset());
|
|
const Address monitor_block_top (rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
|
|
const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
|
|
|
|
#ifdef ASSERT
|
|
{ Label L;
|
|
__ movl(rax, access_flags);
|
|
__ testl(rax, JVM_ACC_SYNCHRONIZED);
|
|
__ jcc(Assembler::notZero, L);
|
|
__ stop("method doesn't need synchronization");
|
|
__ bind(L);
|
|
}
|
|
#endif // ASSERT
|
|
// get synchronization object
|
|
{ Label done;
|
|
const int mirror_offset = in_bytes(Klass::java_mirror_offset());
|
|
__ movl(rax, access_flags);
|
|
__ testl(rax, JVM_ACC_STATIC);
|
|
__ movptr(rax, Address(rdi, Interpreter::local_offset_in_bytes(0))); // get receiver (assume this is frequent case)
|
|
__ jcc(Assembler::zero, done);
|
|
__ movptr(rax, Address(rbx, Method::const_offset()));
|
|
__ movptr(rax, Address(rax, ConstMethod::constants_offset()));
|
|
__ movptr(rax, Address(rax, ConstantPool::pool_holder_offset_in_bytes()));
|
|
__ movptr(rax, Address(rax, mirror_offset));
|
|
__ bind(done);
|
|
}
|
|
// add space for monitor & lock
|
|
__ subptr(rsp, entry_size); // add space for a monitor entry
|
|
__ movptr(monitor_block_top, rsp); // set new monitor block top
|
|
__ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax); // store object
|
|
__ mov(rdx, rsp); // object address
|
|
__ lock_object(rdx);
|
|
}
|
|
|
|
//
|
|
// Generate a fixed interpreter frame. This is identical setup for interpreted methods
|
|
// and for native methods hence the shared code.
|
|
|
|
void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
|
|
// initialize fixed part of activation frame
|
|
__ push(rax); // save return address
|
|
__ enter(); // save old & set new rbp,
|
|
|
|
|
|
__ push(rsi); // set sender sp
|
|
__ push((int32_t)NULL_WORD); // leave last_sp as null
|
|
__ movptr(rsi, Address(rbx,Method::const_offset())); // get ConstMethod*
|
|
__ lea(rsi, Address(rsi,ConstMethod::codes_offset())); // get codebase
|
|
__ push(rbx); // save Method*
|
|
if (ProfileInterpreter) {
|
|
Label method_data_continue;
|
|
__ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset())));
|
|
__ testptr(rdx, rdx);
|
|
__ jcc(Assembler::zero, method_data_continue);
|
|
__ addptr(rdx, in_bytes(MethodData::data_offset()));
|
|
__ bind(method_data_continue);
|
|
__ push(rdx); // set the mdp (method data pointer)
|
|
} else {
|
|
__ push(0);
|
|
}
|
|
|
|
__ movptr(rdx, Address(rbx, Method::const_offset()));
|
|
__ movptr(rdx, Address(rdx, ConstMethod::constants_offset()));
|
|
__ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes()));
|
|
__ push(rdx); // set constant pool cache
|
|
__ push(rdi); // set locals pointer
|
|
if (native_call) {
|
|
__ push(0); // no bcp
|
|
} else {
|
|
__ push(rsi); // set bcp
|
|
}
|
|
__ push(0); // reserve word for pointer to expression stack bottom
|
|
__ movptr(Address(rsp, 0), rsp); // set expression stack bottom
|
|
}
|
|
|
|
// End of helpers
|
|
|
|
//
|
|
// Various method entries
|
|
//------------------------------------------------------------------------------------------------------------------------
|
|
//
|
|
//
|
|
|
|
// Call an accessor method (assuming it is resolved, otherwise drop into vanilla (slow path) entry
|
|
|
|
address InterpreterGenerator::generate_accessor_entry(void) {
|
|
|
|
// rbx,: Method*
|
|
// rcx: receiver (preserve for slow entry into asm interpreter)
|
|
|
|
// rsi: senderSP must preserved for slow path, set SP to it on fast path
|
|
|
|
address entry_point = __ pc();
|
|
Label xreturn_path;
|
|
|
|
// do fastpath for resolved accessor methods
|
|
if (UseFastAccessorMethods) {
|
|
Label slow_path;
|
|
// If we need a safepoint check, generate full interpreter entry.
|
|
ExternalAddress state(SafepointSynchronize::address_of_state());
|
|
__ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
|
|
SafepointSynchronize::_not_synchronized);
|
|
|
|
__ jcc(Assembler::notEqual, slow_path);
|
|
// ASM/C++ Interpreter
|
|
// Code: _aload_0, _(i|a)getfield, _(i|a)return or any rewrites thereof; parameter size = 1
|
|
// Note: We can only use this code if the getfield has been resolved
|
|
// and if we don't have a null-pointer exception => check for
|
|
// these conditions first and use slow path if necessary.
|
|
// rbx,: method
|
|
// rcx: receiver
|
|
__ movptr(rax, Address(rsp, wordSize));
|
|
|
|
// check if local 0 != NULL and read field
|
|
__ testptr(rax, rax);
|
|
__ jcc(Assembler::zero, slow_path);
|
|
|
|
// read first instruction word and extract bytecode @ 1 and index @ 2
|
|
__ movptr(rdx, Address(rbx, Method::const_offset()));
|
|
__ movptr(rdi, Address(rdx, ConstMethod::constants_offset()));
|
|
__ movl(rdx, Address(rdx, ConstMethod::codes_offset()));
|
|
// Shift codes right to get the index on the right.
|
|
// The bytecode fetched looks like <index><0xb4><0x2a>
|
|
__ shrl(rdx, 2*BitsPerByte);
|
|
__ shll(rdx, exact_log2(in_words(ConstantPoolCacheEntry::size())));
|
|
__ movptr(rdi, Address(rdi, ConstantPool::cache_offset_in_bytes()));
|
|
|
|
// rax,: local 0
|
|
// rbx,: method
|
|
// rcx: receiver - do not destroy since it is needed for slow path!
|
|
// rcx: scratch
|
|
// rdx: constant pool cache index
|
|
// rdi: constant pool cache
|
|
// rsi: sender sp
|
|
|
|
// check if getfield has been resolved and read constant pool cache entry
|
|
// check the validity of the cache entry by testing whether _indices field
|
|
// contains Bytecode::_getfield in b1 byte.
|
|
assert(in_words(ConstantPoolCacheEntry::size()) == 4, "adjust shift below");
|
|
__ movl(rcx,
|
|
Address(rdi,
|
|
rdx,
|
|
Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset()));
|
|
__ shrl(rcx, 2*BitsPerByte);
|
|
__ andl(rcx, 0xFF);
|
|
__ cmpl(rcx, Bytecodes::_getfield);
|
|
__ jcc(Assembler::notEqual, slow_path);
|
|
|
|
// Note: constant pool entry is not valid before bytecode is resolved
|
|
__ movptr(rcx,
|
|
Address(rdi,
|
|
rdx,
|
|
Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::f2_offset()));
|
|
__ movl(rdx,
|
|
Address(rdi,
|
|
rdx,
|
|
Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()));
|
|
|
|
Label notByte, notShort, notChar;
|
|
const Address field_address (rax, rcx, Address::times_1);
|
|
|
|
// Need to differentiate between igetfield, agetfield, bgetfield etc.
|
|
// because they are different sizes.
|
|
// Use the type from the constant pool cache
|
|
__ shrl(rdx, ConstantPoolCacheEntry::tos_state_shift);
|
|
// Make sure we don't need to mask rdx after the above shift
|
|
ConstantPoolCacheEntry::verify_tos_state_shift();
|
|
__ cmpl(rdx, btos);
|
|
__ jcc(Assembler::notEqual, notByte);
|
|
__ load_signed_byte(rax, field_address);
|
|
__ jmp(xreturn_path);
|
|
|
|
__ bind(notByte);
|
|
__ cmpl(rdx, stos);
|
|
__ jcc(Assembler::notEqual, notShort);
|
|
__ load_signed_short(rax, field_address);
|
|
__ jmp(xreturn_path);
|
|
|
|
__ bind(notShort);
|
|
__ cmpl(rdx, ctos);
|
|
__ jcc(Assembler::notEqual, notChar);
|
|
__ load_unsigned_short(rax, field_address);
|
|
__ jmp(xreturn_path);
|
|
|
|
__ bind(notChar);
|
|
#ifdef ASSERT
|
|
Label okay;
|
|
__ cmpl(rdx, atos);
|
|
__ jcc(Assembler::equal, okay);
|
|
__ cmpl(rdx, itos);
|
|
__ jcc(Assembler::equal, okay);
|
|
__ stop("what type is this?");
|
|
__ bind(okay);
|
|
#endif // ASSERT
|
|
// All the rest are a 32 bit wordsize
|
|
// This is ok for now. Since fast accessors should be going away
|
|
__ movptr(rax, field_address);
|
|
|
|
__ bind(xreturn_path);
|
|
|
|
// _ireturn/_areturn
|
|
__ pop(rdi); // get return address
|
|
__ mov(rsp, rsi); // set sp to sender sp
|
|
__ jmp(rdi);
|
|
|
|
// generate a vanilla interpreter entry as the slow path
|
|
__ bind(slow_path);
|
|
|
|
(void) generate_normal_entry(false);
|
|
return entry_point;
|
|
}
|
|
return NULL;
|
|
|
|
}
|
|
|
|
// Method entry for java.lang.ref.Reference.get.
|
|
address InterpreterGenerator::generate_Reference_get_entry(void) {
|
|
#ifndef SERIALGC
|
|
// Code: _aload_0, _getfield, _areturn
|
|
// parameter size = 1
|
|
//
|
|
// The code that gets generated by this routine is split into 2 parts:
|
|
// 1. The "intrinsified" code for G1 (or any SATB based GC),
|
|
// 2. The slow path - which is an expansion of the regular method entry.
|
|
//
|
|
// Notes:-
|
|
// * In the G1 code we do not check whether we need to block for
|
|
// a safepoint. If G1 is enabled then we must execute the specialized
|
|
// code for Reference.get (except when the Reference object is null)
|
|
// so that we can log the value in the referent field with an SATB
|
|
// update buffer.
|
|
// If the code for the getfield template is modified so that the
|
|
// G1 pre-barrier code is executed when the current method is
|
|
// Reference.get() then going through the normal method entry
|
|
// will be fine.
|
|
// * The G1 code below can, however, check the receiver object (the instance
|
|
// of java.lang.Reference) and jump to the slow path if null. If the
|
|
// Reference object is null then we obviously cannot fetch the referent
|
|
// and so we don't need to call the G1 pre-barrier. Thus we can use the
|
|
// regular method entry code to generate the NPE.
|
|
//
|
|
// This code is based on generate_accessor_enty.
|
|
|
|
// rbx,: Method*
|
|
// rcx: receiver (preserve for slow entry into asm interpreter)
|
|
|
|
// rsi: senderSP must preserved for slow path, set SP to it on fast path
|
|
|
|
address entry = __ pc();
|
|
|
|
const int referent_offset = java_lang_ref_Reference::referent_offset;
|
|
guarantee(referent_offset > 0, "referent offset not initialized");
|
|
|
|
if (UseG1GC) {
|
|
Label slow_path;
|
|
|
|
// Check if local 0 != NULL
|
|
// If the receiver is null then it is OK to jump to the slow path.
|
|
__ movptr(rax, Address(rsp, wordSize));
|
|
__ testptr(rax, rax);
|
|
__ jcc(Assembler::zero, slow_path);
|
|
|
|
// rax: local 0 (must be preserved across the G1 barrier call)
|
|
//
|
|
// rbx: method (at this point it's scratch)
|
|
// rcx: receiver (at this point it's scratch)
|
|
// rdx: scratch
|
|
// rdi: scratch
|
|
//
|
|
// rsi: sender sp
|
|
|
|
// Preserve the sender sp in case the pre-barrier
|
|
// calls the runtime
|
|
__ push(rsi);
|
|
|
|
// Load the value of the referent field.
|
|
const Address field_address(rax, referent_offset);
|
|
__ movptr(rax, field_address);
|
|
|
|
// Generate the G1 pre-barrier code to log the value of
|
|
// the referent field in an SATB buffer.
|
|
__ get_thread(rcx);
|
|
__ g1_write_barrier_pre(noreg /* obj */,
|
|
rax /* pre_val */,
|
|
rcx /* thread */,
|
|
rbx /* tmp */,
|
|
true /* tosca_save */,
|
|
true /* expand_call */);
|
|
|
|
// _areturn
|
|
__ pop(rsi); // get sender sp
|
|
__ pop(rdi); // get return address
|
|
__ mov(rsp, rsi); // set sp to sender sp
|
|
__ jmp(rdi);
|
|
|
|
__ bind(slow_path);
|
|
(void) generate_normal_entry(false);
|
|
|
|
return entry;
|
|
}
|
|
#endif // SERIALGC
|
|
|
|
// If G1 is not enabled then attempt to go through the accessor entry point
|
|
// Reference.get is an accessor
|
|
return generate_accessor_entry();
|
|
}
|
|
|
|
//
|
|
// Interpreter stub for calling a native method. (asm interpreter)
|
|
// This sets up a somewhat different looking stack for calling the native method
|
|
// than the typical interpreter frame setup.
|
|
//
|
|
|
|
address InterpreterGenerator::generate_native_entry(bool synchronized) {
|
|
// determine code generation flags
|
|
bool inc_counter = UseCompiler || CountCompiledCalls;
|
|
|
|
// rbx,: Method*
|
|
// rsi: sender sp
|
|
// rsi: previous interpreter state (C++ interpreter) must preserve
|
|
address entry_point = __ pc();
|
|
|
|
|
|
const Address size_of_parameters(rbx, Method::size_of_parameters_offset());
|
|
const Address invocation_counter(rbx, Method::invocation_counter_offset() + InvocationCounter::counter_offset());
|
|
const Address access_flags (rbx, Method::access_flags_offset());
|
|
|
|
// get parameter size (always needed)
|
|
__ load_unsigned_short(rcx, size_of_parameters);
|
|
|
|
// native calls don't need the stack size check since they have no expression stack
|
|
// and the arguments are already on the stack and we only add a handful of words
|
|
// to the stack
|
|
|
|
// rbx,: Method*
|
|
// rcx: size of parameters
|
|
// rsi: sender sp
|
|
|
|
__ pop(rax); // get return address
|
|
// for natives the size of locals is zero
|
|
|
|
// compute beginning of parameters (rdi)
|
|
__ lea(rdi, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
|
|
|
|
|
|
// add 2 zero-initialized slots for native calls
|
|
// NULL result handler
|
|
__ push((int32_t)NULL_WORD);
|
|
// NULL oop temp (mirror or jni oop result)
|
|
__ push((int32_t)NULL_WORD);
|
|
|
|
if (inc_counter) __ movl(rcx, invocation_counter); // (pre-)fetch invocation count
|
|
// initialize fixed part of activation frame
|
|
|
|
generate_fixed_frame(true);
|
|
|
|
// make sure method is native & not abstract
|
|
#ifdef ASSERT
|
|
__ movl(rax, access_flags);
|
|
{
|
|
Label L;
|
|
__ testl(rax, JVM_ACC_NATIVE);
|
|
__ jcc(Assembler::notZero, L);
|
|
__ stop("tried to execute non-native method as native");
|
|
__ bind(L);
|
|
}
|
|
{ Label L;
|
|
__ testl(rax, JVM_ACC_ABSTRACT);
|
|
__ jcc(Assembler::zero, L);
|
|
__ stop("tried to execute abstract method in interpreter");
|
|
__ bind(L);
|
|
}
|
|
#endif
|
|
|
|
// Since at this point in the method invocation the exception handler
|
|
// would try to exit the monitor of synchronized methods which hasn't
|
|
// been entered yet, we set the thread local variable
|
|
// _do_not_unlock_if_synchronized to true. The remove_activation will
|
|
// check this flag.
|
|
|
|
__ get_thread(rax);
|
|
const Address do_not_unlock_if_synchronized(rax,
|
|
in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
|
|
__ movbool(do_not_unlock_if_synchronized, true);
|
|
|
|
// increment invocation count & check for overflow
|
|
Label invocation_counter_overflow;
|
|
if (inc_counter) {
|
|
generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
|
|
}
|
|
|
|
Label continue_after_compile;
|
|
__ bind(continue_after_compile);
|
|
|
|
bang_stack_shadow_pages(true);
|
|
|
|
// reset the _do_not_unlock_if_synchronized flag
|
|
__ get_thread(rax);
|
|
__ movbool(do_not_unlock_if_synchronized, false);
|
|
|
|
// check for synchronized methods
|
|
// Must happen AFTER invocation_counter check and stack overflow check,
|
|
// so method is not locked if overflows.
|
|
//
|
|
if (synchronized) {
|
|
lock_method();
|
|
} else {
|
|
// no synchronization necessary
|
|
#ifdef ASSERT
|
|
{ Label L;
|
|
__ movl(rax, access_flags);
|
|
__ testl(rax, JVM_ACC_SYNCHRONIZED);
|
|
__ jcc(Assembler::zero, L);
|
|
__ stop("method needs synchronization");
|
|
__ bind(L);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
// start execution
|
|
#ifdef ASSERT
|
|
{ Label L;
|
|
const Address monitor_block_top (rbp,
|
|
frame::interpreter_frame_monitor_block_top_offset * wordSize);
|
|
__ movptr(rax, monitor_block_top);
|
|
__ cmpptr(rax, rsp);
|
|
__ jcc(Assembler::equal, L);
|
|
__ stop("broken stack frame setup in interpreter");
|
|
__ bind(L);
|
|
}
|
|
#endif
|
|
|
|
// jvmti/dtrace support
|
|
__ notify_method_entry();
|
|
|
|
// work registers
|
|
const Register method = rbx;
|
|
const Register thread = rdi;
|
|
const Register t = rcx;
|
|
|
|
// allocate space for parameters
|
|
__ get_method(method);
|
|
__ load_unsigned_short(t, Address(method, Method::size_of_parameters_offset()));
|
|
__ shlptr(t, Interpreter::logStackElementSize);
|
|
__ addptr(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror
|
|
__ subptr(rsp, t);
|
|
__ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics
|
|
|
|
// get signature handler
|
|
{ Label L;
|
|
__ movptr(t, Address(method, Method::signature_handler_offset()));
|
|
__ testptr(t, t);
|
|
__ jcc(Assembler::notZero, L);
|
|
__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), method);
|
|
__ get_method(method);
|
|
__ movptr(t, Address(method, Method::signature_handler_offset()));
|
|
__ bind(L);
|
|
}
|
|
|
|
// call signature handler
|
|
assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rdi, "adjust this code");
|
|
assert(InterpreterRuntime::SignatureHandlerGenerator::to () == rsp, "adjust this code");
|
|
assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == t , "adjust this code");
|
|
// The generated handlers do not touch RBX (the method oop).
|
|
// However, large signatures cannot be cached and are generated
|
|
// each time here. The slow-path generator will blow RBX
|
|
// sometime, so we must reload it after the call.
|
|
__ call(t);
|
|
__ get_method(method); // slow path call blows RBX on DevStudio 5.0
|
|
|
|
// result handler is in rax,
|
|
// set result handler
|
|
__ movptr(Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize), rax);
|
|
|
|
// pass mirror handle if static call
|
|
{ Label L;
|
|
const int mirror_offset = in_bytes(Klass::java_mirror_offset());
|
|
__ movl(t, Address(method, Method::access_flags_offset()));
|
|
__ testl(t, JVM_ACC_STATIC);
|
|
__ jcc(Assembler::zero, L);
|
|
// get mirror
|
|
__ movptr(t, Address(method, Method:: const_offset()));
|
|
__ movptr(t, Address(t, ConstMethod::constants_offset()));
|
|
__ movptr(t, Address(t, ConstantPool::pool_holder_offset_in_bytes()));
|
|
__ movptr(t, Address(t, mirror_offset));
|
|
// copy mirror into activation frame
|
|
__ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize), t);
|
|
// pass handle to mirror
|
|
__ lea(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
|
|
__ movptr(Address(rsp, wordSize), t);
|
|
__ bind(L);
|
|
}
|
|
|
|
// get native function entry point
|
|
{ Label L;
|
|
__ movptr(rax, Address(method, Method::native_function_offset()));
|
|
ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
|
|
__ cmpptr(rax, unsatisfied.addr());
|
|
__ jcc(Assembler::notEqual, L);
|
|
__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), method);
|
|
__ get_method(method);
|
|
__ movptr(rax, Address(method, Method::native_function_offset()));
|
|
__ bind(L);
|
|
}
|
|
|
|
// pass JNIEnv
|
|
__ get_thread(thread);
|
|
__ lea(t, Address(thread, JavaThread::jni_environment_offset()));
|
|
__ movptr(Address(rsp, 0), t);
|
|
|
|
// set_last_Java_frame_before_call
|
|
// It is enough that the pc()
|
|
// points into the right code segment. It does not have to be the correct return pc.
|
|
__ set_last_Java_frame(thread, noreg, rbp, __ pc());
|
|
|
|
// change thread state
|
|
#ifdef ASSERT
|
|
{ Label L;
|
|
__ movl(t, Address(thread, JavaThread::thread_state_offset()));
|
|
__ cmpl(t, _thread_in_Java);
|
|
__ jcc(Assembler::equal, L);
|
|
__ stop("Wrong thread state in native stub");
|
|
__ bind(L);
|
|
}
|
|
#endif
|
|
|
|
// Change state to native
|
|
__ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native);
|
|
__ call(rax);
|
|
|
|
// result potentially in rdx:rax or ST0
|
|
|
|
// Either restore the MXCSR register after returning from the JNI Call
|
|
// or verify that it wasn't changed.
|
|
if (VM_Version::supports_sse()) {
|
|
if (RestoreMXCSROnJNICalls) {
|
|
__ ldmxcsr(ExternalAddress(StubRoutines::addr_mxcsr_std()));
|
|
}
|
|
else if (CheckJNICalls ) {
|
|
__ call(RuntimeAddress(StubRoutines::x86::verify_mxcsr_entry()));
|
|
}
|
|
}
|
|
|
|
// Either restore the x87 floating pointer control word after returning
|
|
// from the JNI call or verify that it wasn't changed.
|
|
if (CheckJNICalls) {
|
|
__ call(RuntimeAddress(StubRoutines::x86::verify_fpu_cntrl_wrd_entry()));
|
|
}
|
|
|
|
// save potential result in ST(0) & rdx:rax
|
|
// (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 -
|
|
// the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers)
|
|
// It is safe to do this push because state is _thread_in_native and return address will be found
|
|
// via _last_native_pc and not via _last_jave_sp
|
|
|
|
// NOTE: the order of theses push(es) is known to frame::interpreter_frame_result.
|
|
// If the order changes or anything else is added to the stack the code in
|
|
// interpreter_frame_result will have to be changed.
|
|
|
|
{ Label L;
|
|
Label push_double;
|
|
ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT));
|
|
ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE));
|
|
__ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
|
|
float_handler.addr());
|
|
__ jcc(Assembler::equal, push_double);
|
|
__ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
|
|
double_handler.addr());
|
|
__ jcc(Assembler::notEqual, L);
|
|
__ bind(push_double);
|
|
__ push(dtos);
|
|
__ bind(L);
|
|
}
|
|
__ push(ltos);
|
|
|
|
// change thread state
|
|
__ get_thread(thread);
|
|
__ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native_trans);
|
|
if(os::is_MP()) {
|
|
if (UseMembar) {
|
|
// Force this write out before the read below
|
|
__ membar(Assembler::Membar_mask_bits(
|
|
Assembler::LoadLoad | Assembler::LoadStore |
|
|
Assembler::StoreLoad | Assembler::StoreStore));
|
|
} else {
|
|
// Write serialization page so VM thread can do a pseudo remote membar.
|
|
// We use the current thread pointer to calculate a thread specific
|
|
// offset to write to within the page. This minimizes bus traffic
|
|
// due to cache line collision.
|
|
__ serialize_memory(thread, rcx);
|
|
}
|
|
}
|
|
|
|
if (AlwaysRestoreFPU) {
|
|
// Make sure the control word is correct.
|
|
__ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
|
|
}
|
|
|
|
// check for safepoint operation in progress and/or pending suspend requests
|
|
{ Label Continue;
|
|
|
|
__ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
|
|
SafepointSynchronize::_not_synchronized);
|
|
|
|
Label L;
|
|
__ jcc(Assembler::notEqual, L);
|
|
__ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0);
|
|
__ jcc(Assembler::equal, Continue);
|
|
__ bind(L);
|
|
|
|
// Don't use call_VM as it will see a possible pending exception and forward it
|
|
// and never return here preventing us from clearing _last_native_pc down below.
|
|
// Also can't use call_VM_leaf either as it will check to see if rsi & rdi are
|
|
// preserved and correspond to the bcp/locals pointers. So we do a runtime call
|
|
// by hand.
|
|
//
|
|
__ push(thread);
|
|
__ call(RuntimeAddress(CAST_FROM_FN_PTR(address,
|
|
JavaThread::check_special_condition_for_native_trans)));
|
|
__ increment(rsp, wordSize);
|
|
__ get_thread(thread);
|
|
|
|
__ bind(Continue);
|
|
}
|
|
|
|
// change thread state
|
|
__ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java);
|
|
|
|
__ reset_last_Java_frame(thread, true, true);
|
|
|
|
// reset handle block
|
|
__ movptr(t, Address(thread, JavaThread::active_handles_offset()));
|
|
__ movptr(Address(t, JNIHandleBlock::top_offset_in_bytes()), NULL_WORD);
|
|
|
|
// If result was an oop then unbox and save it in the frame
|
|
{ Label L;
|
|
Label no_oop, store_result;
|
|
ExternalAddress handler(AbstractInterpreter::result_handler(T_OBJECT));
|
|
__ cmpptr(Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize),
|
|
handler.addr());
|
|
__ jcc(Assembler::notEqual, no_oop);
|
|
__ cmpptr(Address(rsp, 0), (int32_t)NULL_WORD);
|
|
__ pop(ltos);
|
|
__ testptr(rax, rax);
|
|
__ jcc(Assembler::zero, store_result);
|
|
// unbox
|
|
__ movptr(rax, Address(rax, 0));
|
|
__ bind(store_result);
|
|
__ movptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset)*wordSize), rax);
|
|
// keep stack depth as expected by pushing oop which will eventually be discarded
|
|
__ push(ltos);
|
|
__ bind(no_oop);
|
|
}
|
|
|
|
{
|
|
Label no_reguard;
|
|
__ cmpl(Address(thread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_yellow_disabled);
|
|
__ jcc(Assembler::notEqual, no_reguard);
|
|
|
|
__ pusha();
|
|
__ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
|
|
__ popa();
|
|
|
|
__ bind(no_reguard);
|
|
}
|
|
|
|
// restore rsi to have legal interpreter frame,
|
|
// i.e., bci == 0 <=> rsi == code_base()
|
|
// Can't call_VM until bcp is within reasonable.
|
|
__ get_method(method); // method is junk from thread_in_native to now.
|
|
__ movptr(rsi, Address(method,Method::const_offset())); // get ConstMethod*
|
|
__ lea(rsi, Address(rsi,ConstMethod::codes_offset())); // get codebase
|
|
|
|
// handle exceptions (exception handling will handle unlocking!)
|
|
{ Label L;
|
|
__ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD);
|
|
__ jcc(Assembler::zero, L);
|
|
// Note: At some point we may want to unify this with the code used in call_VM_base();
|
|
// i.e., we should use the StubRoutines::forward_exception code. For now this
|
|
// doesn't work here because the rsp is not correctly set at this point.
|
|
__ MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception));
|
|
__ should_not_reach_here();
|
|
__ bind(L);
|
|
}
|
|
|
|
// do unlocking if necessary
|
|
{ Label L;
|
|
__ movl(t, Address(method, Method::access_flags_offset()));
|
|
__ testl(t, JVM_ACC_SYNCHRONIZED);
|
|
__ jcc(Assembler::zero, L);
|
|
// the code below should be shared with interpreter macro assembler implementation
|
|
{ Label unlock;
|
|
// BasicObjectLock will be first in list, since this is a synchronized method. However, need
|
|
// to check that the object has not been unlocked by an explicit monitorexit bytecode.
|
|
const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock));
|
|
|
|
__ lea(rdx, monitor); // address of first monitor
|
|
|
|
__ movptr(t, Address(rdx, BasicObjectLock::obj_offset_in_bytes()));
|
|
__ testptr(t, t);
|
|
__ jcc(Assembler::notZero, unlock);
|
|
|
|
// Entry already unlocked, need to throw exception
|
|
__ MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
|
|
__ should_not_reach_here();
|
|
|
|
__ bind(unlock);
|
|
__ unlock_object(rdx);
|
|
}
|
|
__ bind(L);
|
|
}
|
|
|
|
// jvmti/dtrace support
|
|
// Note: This must happen _after_ handling/throwing any exceptions since
|
|
// the exception handler code notifies the runtime of method exits
|
|
// too. If this happens before, method entry/exit notifications are
|
|
// not properly paired (was bug - gri 11/22/99).
|
|
__ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
|
|
|
|
// restore potential result in rdx:rax, call result handler to restore potential result in ST0 & handle result
|
|
__ pop(ltos);
|
|
__ movptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize));
|
|
__ call(t);
|
|
|
|
// remove activation
|
|
__ movptr(t, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp
|
|
__ leave(); // remove frame anchor
|
|
__ pop(rdi); // get return address
|
|
__ mov(rsp, t); // set sp to sender sp
|
|
__ jmp(rdi);
|
|
|
|
if (inc_counter) {
|
|
// Handle overflow of counter and compile method
|
|
__ bind(invocation_counter_overflow);
|
|
generate_counter_overflow(&continue_after_compile);
|
|
}
|
|
|
|
return entry_point;
|
|
}
|
|
|
|
//
|
|
// Generic interpreted method entry to (asm) interpreter
|
|
//
|
|
address InterpreterGenerator::generate_normal_entry(bool synchronized) {
|
|
// determine code generation flags
|
|
bool inc_counter = UseCompiler || CountCompiledCalls;
|
|
|
|
// rbx,: Method*
|
|
// rsi: sender sp
|
|
address entry_point = __ pc();
|
|
|
|
|
|
const Address size_of_parameters(rbx, Method::size_of_parameters_offset());
|
|
const Address size_of_locals (rbx, Method::size_of_locals_offset());
|
|
const Address invocation_counter(rbx, Method::invocation_counter_offset() + InvocationCounter::counter_offset());
|
|
const Address access_flags (rbx, Method::access_flags_offset());
|
|
|
|
// get parameter size (always needed)
|
|
__ load_unsigned_short(rcx, size_of_parameters);
|
|
|
|
// rbx,: Method*
|
|
// rcx: size of parameters
|
|
|
|
// rsi: sender_sp (could differ from sp+wordSize if we were called via c2i )
|
|
|
|
__ load_unsigned_short(rdx, size_of_locals); // get size of locals in words
|
|
__ subl(rdx, rcx); // rdx = no. of additional locals
|
|
|
|
// see if we've got enough room on the stack for locals plus overhead.
|
|
generate_stack_overflow_check();
|
|
|
|
// get return address
|
|
__ pop(rax);
|
|
|
|
// compute beginning of parameters (rdi)
|
|
__ lea(rdi, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
|
|
|
|
// rdx - # of additional locals
|
|
// allocate space for locals
|
|
// explicitly initialize locals
|
|
{
|
|
Label exit, loop;
|
|
__ testl(rdx, rdx);
|
|
__ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0
|
|
__ bind(loop);
|
|
__ push((int32_t)NULL_WORD); // initialize local variables
|
|
__ decrement(rdx); // until everything initialized
|
|
__ jcc(Assembler::greater, loop);
|
|
__ bind(exit);
|
|
}
|
|
|
|
if (inc_counter) __ movl(rcx, invocation_counter); // (pre-)fetch invocation count
|
|
// initialize fixed part of activation frame
|
|
generate_fixed_frame(false);
|
|
|
|
// make sure method is not native & not abstract
|
|
#ifdef ASSERT
|
|
__ movl(rax, access_flags);
|
|
{
|
|
Label L;
|
|
__ testl(rax, JVM_ACC_NATIVE);
|
|
__ jcc(Assembler::zero, L);
|
|
__ stop("tried to execute native method as non-native");
|
|
__ bind(L);
|
|
}
|
|
{ Label L;
|
|
__ testl(rax, JVM_ACC_ABSTRACT);
|
|
__ jcc(Assembler::zero, L);
|
|
__ stop("tried to execute abstract method in interpreter");
|
|
__ bind(L);
|
|
}
|
|
#endif
|
|
|
|
// Since at this point in the method invocation the exception handler
|
|
// would try to exit the monitor of synchronized methods which hasn't
|
|
// been entered yet, we set the thread local variable
|
|
// _do_not_unlock_if_synchronized to true. The remove_activation will
|
|
// check this flag.
|
|
|
|
__ get_thread(rax);
|
|
const Address do_not_unlock_if_synchronized(rax,
|
|
in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
|
|
__ movbool(do_not_unlock_if_synchronized, true);
|
|
|
|
// increment invocation count & check for overflow
|
|
Label invocation_counter_overflow;
|
|
Label profile_method;
|
|
Label profile_method_continue;
|
|
if (inc_counter) {
|
|
generate_counter_incr(&invocation_counter_overflow, &profile_method, &profile_method_continue);
|
|
if (ProfileInterpreter) {
|
|
__ bind(profile_method_continue);
|
|
}
|
|
}
|
|
Label continue_after_compile;
|
|
__ bind(continue_after_compile);
|
|
|
|
bang_stack_shadow_pages(false);
|
|
|
|
// reset the _do_not_unlock_if_synchronized flag
|
|
__ get_thread(rax);
|
|
__ movbool(do_not_unlock_if_synchronized, false);
|
|
|
|
// check for synchronized methods
|
|
// Must happen AFTER invocation_counter check and stack overflow check,
|
|
// so method is not locked if overflows.
|
|
//
|
|
if (synchronized) {
|
|
// Allocate monitor and lock method
|
|
lock_method();
|
|
} else {
|
|
// no synchronization necessary
|
|
#ifdef ASSERT
|
|
{ Label L;
|
|
__ movl(rax, access_flags);
|
|
__ testl(rax, JVM_ACC_SYNCHRONIZED);
|
|
__ jcc(Assembler::zero, L);
|
|
__ stop("method needs synchronization");
|
|
__ bind(L);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
// start execution
|
|
#ifdef ASSERT
|
|
{ Label L;
|
|
const Address monitor_block_top (rbp,
|
|
frame::interpreter_frame_monitor_block_top_offset * wordSize);
|
|
__ movptr(rax, monitor_block_top);
|
|
__ cmpptr(rax, rsp);
|
|
__ jcc(Assembler::equal, L);
|
|
__ stop("broken stack frame setup in interpreter");
|
|
__ bind(L);
|
|
}
|
|
#endif
|
|
|
|
// jvmti support
|
|
__ notify_method_entry();
|
|
|
|
__ dispatch_next(vtos);
|
|
|
|
// invocation counter overflow
|
|
if (inc_counter) {
|
|
if (ProfileInterpreter) {
|
|
// We have decided to profile this method in the interpreter
|
|
__ bind(profile_method);
|
|
__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
|
|
__ set_method_data_pointer_for_bcp();
|
|
__ get_method(rbx);
|
|
__ jmp(profile_method_continue);
|
|
}
|
|
// Handle overflow of counter and compile method
|
|
__ bind(invocation_counter_overflow);
|
|
generate_counter_overflow(&continue_after_compile);
|
|
}
|
|
|
|
return entry_point;
|
|
}
|
|
|
|
//------------------------------------------------------------------------------------------------------------------------
|
|
// Entry points
|
|
//
|
|
// Here we generate the various kind of entries into the interpreter.
|
|
// The two main entry type are generic bytecode methods and native call method.
|
|
// These both come in synchronized and non-synchronized versions but the
|
|
// frame layout they create is very similar. The other method entry
|
|
// types are really just special purpose entries that are really entry
|
|
// and interpretation all in one. These are for trivial methods like
|
|
// accessor, empty, or special math methods.
|
|
//
|
|
// When control flow reaches any of the entry types for the interpreter
|
|
// the following holds ->
|
|
//
|
|
// Arguments:
|
|
//
|
|
// rbx,: Method*
|
|
// rcx: receiver
|
|
//
|
|
//
|
|
// Stack layout immediately at entry
|
|
//
|
|
// [ return address ] <--- rsp
|
|
// [ parameter n ]
|
|
// ...
|
|
// [ parameter 1 ]
|
|
// [ expression stack ] (caller's java expression stack)
|
|
|
|
// Assuming that we don't go to one of the trivial specialized
|
|
// entries the stack will look like below when we are ready to execute
|
|
// the first bytecode (or call the native routine). The register usage
|
|
// will be as the template based interpreter expects (see interpreter_x86.hpp).
|
|
//
|
|
// local variables follow incoming parameters immediately; i.e.
|
|
// the return address is moved to the end of the locals).
|
|
//
|
|
// [ monitor entry ] <--- rsp
|
|
// ...
|
|
// [ monitor entry ]
|
|
// [ expr. stack bottom ]
|
|
// [ saved rsi ]
|
|
// [ current rdi ]
|
|
// [ Method* ]
|
|
// [ saved rbp, ] <--- rbp,
|
|
// [ return address ]
|
|
// [ local variable m ]
|
|
// ...
|
|
// [ local variable 1 ]
|
|
// [ parameter n ]
|
|
// ...
|
|
// [ parameter 1 ] <--- rdi
|
|
|
|
address AbstractInterpreterGenerator::generate_method_entry(AbstractInterpreter::MethodKind kind) {
|
|
// determine code generation flags
|
|
bool synchronized = false;
|
|
address entry_point = NULL;
|
|
|
|
switch (kind) {
|
|
case Interpreter::zerolocals : break;
|
|
case Interpreter::zerolocals_synchronized: synchronized = true; break;
|
|
case Interpreter::native : entry_point = ((InterpreterGenerator*)this)->generate_native_entry(false); break;
|
|
case Interpreter::native_synchronized : entry_point = ((InterpreterGenerator*)this)->generate_native_entry(true); break;
|
|
case Interpreter::empty : entry_point = ((InterpreterGenerator*)this)->generate_empty_entry(); break;
|
|
case Interpreter::accessor : entry_point = ((InterpreterGenerator*)this)->generate_accessor_entry(); break;
|
|
case Interpreter::abstract : entry_point = ((InterpreterGenerator*)this)->generate_abstract_entry(); break;
|
|
|
|
case Interpreter::java_lang_math_sin : // fall thru
|
|
case Interpreter::java_lang_math_cos : // fall thru
|
|
case Interpreter::java_lang_math_tan : // fall thru
|
|
case Interpreter::java_lang_math_abs : // fall thru
|
|
case Interpreter::java_lang_math_log : // fall thru
|
|
case Interpreter::java_lang_math_log10 : // fall thru
|
|
case Interpreter::java_lang_math_sqrt : // fall thru
|
|
case Interpreter::java_lang_math_pow : // fall thru
|
|
case Interpreter::java_lang_math_exp : entry_point = ((InterpreterGenerator*)this)->generate_math_entry(kind); break;
|
|
case Interpreter::java_lang_ref_reference_get
|
|
: entry_point = ((InterpreterGenerator*)this)->generate_Reference_get_entry(); break;
|
|
default:
|
|
fatal(err_msg("unexpected method kind: %d", kind));
|
|
break;
|
|
}
|
|
|
|
if (entry_point) return entry_point;
|
|
|
|
return ((InterpreterGenerator*)this)->generate_normal_entry(synchronized);
|
|
|
|
}
|
|
|
|
// These should never be compiled since the interpreter will prefer
|
|
// the compiled version to the intrinsic version.
|
|
bool AbstractInterpreter::can_be_compiled(methodHandle m) {
|
|
switch (method_kind(m)) {
|
|
case Interpreter::java_lang_math_sin : // fall thru
|
|
case Interpreter::java_lang_math_cos : // fall thru
|
|
case Interpreter::java_lang_math_tan : // fall thru
|
|
case Interpreter::java_lang_math_abs : // fall thru
|
|
case Interpreter::java_lang_math_log : // fall thru
|
|
case Interpreter::java_lang_math_log10 : // fall thru
|
|
case Interpreter::java_lang_math_sqrt : // fall thru
|
|
case Interpreter::java_lang_math_pow : // fall thru
|
|
case Interpreter::java_lang_math_exp :
|
|
return false;
|
|
default:
|
|
return true;
|
|
}
|
|
}
|
|
|
|
// How much stack a method activation needs in words.
|
|
int AbstractInterpreter::size_top_interpreter_activation(Method* method) {
|
|
|
|
const int stub_code = 4; // see generate_call_stub
|
|
// Save space for one monitor to get into the interpreted method in case
|
|
// the method is synchronized
|
|
int monitor_size = method->is_synchronized() ?
|
|
1*frame::interpreter_frame_monitor_size() : 0;
|
|
|
|
// total overhead size: entry_size + (saved rbp, thru expr stack bottom).
|
|
// be sure to change this if you add/subtract anything to/from the overhead area
|
|
const int overhead_size = -frame::interpreter_frame_initial_sp_offset;
|
|
|
|
const int extra_stack = Method::extra_stack_entries();
|
|
const int method_stack = (method->max_locals() + method->max_stack() + extra_stack) *
|
|
Interpreter::stackElementWords;
|
|
return overhead_size + method_stack + stub_code;
|
|
}
|
|
|
|
// asm based interpreter deoptimization helpers
|
|
|
|
int AbstractInterpreter::layout_activation(Method* method,
|
|
int tempcount,
|
|
int popframe_extra_args,
|
|
int moncount,
|
|
int caller_actual_parameters,
|
|
int callee_param_count,
|
|
int callee_locals,
|
|
frame* caller,
|
|
frame* interpreter_frame,
|
|
bool is_top_frame) {
|
|
// Note: This calculation must exactly parallel the frame setup
|
|
// in AbstractInterpreterGenerator::generate_method_entry.
|
|
// If interpreter_frame!=NULL, set up the method, locals, and monitors.
|
|
// The frame interpreter_frame, if not NULL, is guaranteed to be the right size,
|
|
// as determined by a previous call to this method.
|
|
// It is also guaranteed to be walkable even though it is in a skeletal state
|
|
// NOTE: return size is in words not bytes
|
|
|
|
// fixed size of an interpreter frame:
|
|
int max_locals = method->max_locals() * Interpreter::stackElementWords;
|
|
int extra_locals = (method->max_locals() - method->size_of_parameters()) *
|
|
Interpreter::stackElementWords;
|
|
|
|
int overhead = frame::sender_sp_offset - frame::interpreter_frame_initial_sp_offset;
|
|
|
|
// Our locals were accounted for by the caller (or last_frame_adjust on the transistion)
|
|
// Since the callee parameters already account for the callee's params we only need to account for
|
|
// the extra locals.
|
|
|
|
|
|
int size = overhead +
|
|
((callee_locals - callee_param_count)*Interpreter::stackElementWords) +
|
|
(moncount*frame::interpreter_frame_monitor_size()) +
|
|
tempcount*Interpreter::stackElementWords + popframe_extra_args;
|
|
|
|
if (interpreter_frame != NULL) {
|
|
#ifdef ASSERT
|
|
if (!EnableInvokeDynamic)
|
|
// @@@ FIXME: Should we correct interpreter_frame_sender_sp in the calling sequences?
|
|
// Probably, since deoptimization doesn't work yet.
|
|
assert(caller->unextended_sp() == interpreter_frame->interpreter_frame_sender_sp(), "Frame not properly walkable");
|
|
assert(caller->sp() == interpreter_frame->sender_sp(), "Frame not properly walkable(2)");
|
|
#endif
|
|
|
|
interpreter_frame->interpreter_frame_set_method(method);
|
|
// NOTE the difference in using sender_sp and interpreter_frame_sender_sp
|
|
// interpreter_frame_sender_sp is the original sp of the caller (the unextended_sp)
|
|
// and sender_sp is fp+8
|
|
intptr_t* locals = interpreter_frame->sender_sp() + max_locals - 1;
|
|
|
|
#ifdef ASSERT
|
|
if (caller->is_interpreted_frame()) {
|
|
assert(locals < caller->fp() + frame::interpreter_frame_initial_sp_offset, "bad placement");
|
|
}
|
|
#endif
|
|
|
|
interpreter_frame->interpreter_frame_set_locals(locals);
|
|
BasicObjectLock* montop = interpreter_frame->interpreter_frame_monitor_begin();
|
|
BasicObjectLock* monbot = montop - moncount;
|
|
interpreter_frame->interpreter_frame_set_monitor_end(monbot);
|
|
|
|
// Set last_sp
|
|
intptr_t* rsp = (intptr_t*) monbot -
|
|
tempcount*Interpreter::stackElementWords -
|
|
popframe_extra_args;
|
|
interpreter_frame->interpreter_frame_set_last_sp(rsp);
|
|
|
|
// All frames but the initial (oldest) interpreter frame we fill in have a
|
|
// value for sender_sp that allows walking the stack but isn't
|
|
// truly correct. Correct the value here.
|
|
|
|
if (extra_locals != 0 &&
|
|
interpreter_frame->sender_sp() == interpreter_frame->interpreter_frame_sender_sp() ) {
|
|
interpreter_frame->set_interpreter_frame_sender_sp(caller->sp() + extra_locals);
|
|
}
|
|
*interpreter_frame->interpreter_frame_cache_addr() =
|
|
method->constants()->cache();
|
|
}
|
|
return size;
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------------------------------------------------------------------
|
|
// Exceptions
|
|
|
|
void TemplateInterpreterGenerator::generate_throw_exception() {
|
|
// Entry point in previous activation (i.e., if the caller was interpreted)
|
|
Interpreter::_rethrow_exception_entry = __ pc();
|
|
const Register thread = rcx;
|
|
|
|
// Restore sp to interpreter_frame_last_sp even though we are going
|
|
// to empty the expression stack for the exception processing.
|
|
__ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
|
|
// rax,: exception
|
|
// rdx: return address/pc that threw exception
|
|
__ restore_bcp(); // rsi points to call/send
|
|
__ restore_locals();
|
|
|
|
// Entry point for exceptions thrown within interpreter code
|
|
Interpreter::_throw_exception_entry = __ pc();
|
|
// expression stack is undefined here
|
|
// rax,: exception
|
|
// rsi: exception bcp
|
|
__ verify_oop(rax);
|
|
|
|
// expression stack must be empty before entering the VM in case of an exception
|
|
__ empty_expression_stack();
|
|
__ empty_FPU_stack();
|
|
// find exception handler address and preserve exception oop
|
|
__ call_VM(rdx, CAST_FROM_FN_PTR(address, InterpreterRuntime::exception_handler_for_exception), rax);
|
|
// rax,: exception handler entry point
|
|
// rdx: preserved exception oop
|
|
// rsi: bcp for exception handler
|
|
__ push_ptr(rdx); // push exception which is now the only value on the stack
|
|
__ jmp(rax); // jump to exception handler (may be _remove_activation_entry!)
|
|
|
|
// If the exception is not handled in the current frame the frame is removed and
|
|
// the exception is rethrown (i.e. exception continuation is _rethrow_exception).
|
|
//
|
|
// Note: At this point the bci is still the bxi for the instruction which caused
|
|
// the exception and the expression stack is empty. Thus, for any VM calls
|
|
// at this point, GC will find a legal oop map (with empty expression stack).
|
|
|
|
// In current activation
|
|
// tos: exception
|
|
// rsi: exception bcp
|
|
|
|
//
|
|
// JVMTI PopFrame support
|
|
//
|
|
|
|
Interpreter::_remove_activation_preserving_args_entry = __ pc();
|
|
__ empty_expression_stack();
|
|
__ empty_FPU_stack();
|
|
// Set the popframe_processing bit in pending_popframe_condition indicating that we are
|
|
// currently handling popframe, so that call_VMs that may happen later do not trigger new
|
|
// popframe handling cycles.
|
|
__ get_thread(thread);
|
|
__ movl(rdx, Address(thread, JavaThread::popframe_condition_offset()));
|
|
__ orl(rdx, JavaThread::popframe_processing_bit);
|
|
__ movl(Address(thread, JavaThread::popframe_condition_offset()), rdx);
|
|
|
|
{
|
|
// Check to see whether we are returning to a deoptimized frame.
|
|
// (The PopFrame call ensures that the caller of the popped frame is
|
|
// either interpreted or compiled and deoptimizes it if compiled.)
|
|
// In this case, we can't call dispatch_next() after the frame is
|
|
// popped, but instead must save the incoming arguments and restore
|
|
// them after deoptimization has occurred.
|
|
//
|
|
// Note that we don't compare the return PC against the
|
|
// deoptimization blob's unpack entry because of the presence of
|
|
// adapter frames in C2.
|
|
Label caller_not_deoptimized;
|
|
__ movptr(rdx, Address(rbp, frame::return_addr_offset * wordSize));
|
|
__ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), rdx);
|
|
__ testl(rax, rax);
|
|
__ jcc(Assembler::notZero, caller_not_deoptimized);
|
|
|
|
// Compute size of arguments for saving when returning to deoptimized caller
|
|
__ get_method(rax);
|
|
__ load_unsigned_short(rax, Address(rax, in_bytes(Method::size_of_parameters_offset())));
|
|
__ shlptr(rax, Interpreter::logStackElementSize);
|
|
__ restore_locals();
|
|
__ subptr(rdi, rax);
|
|
__ addptr(rdi, wordSize);
|
|
// Save these arguments
|
|
__ get_thread(thread);
|
|
__ super_call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::popframe_preserve_args), thread, rax, rdi);
|
|
|
|
__ remove_activation(vtos, rdx,
|
|
/* throw_monitor_exception */ false,
|
|
/* install_monitor_exception */ false,
|
|
/* notify_jvmdi */ false);
|
|
|
|
// Inform deoptimization that it is responsible for restoring these arguments
|
|
__ get_thread(thread);
|
|
__ movl(Address(thread, JavaThread::popframe_condition_offset()), JavaThread::popframe_force_deopt_reexecution_bit);
|
|
|
|
// Continue in deoptimization handler
|
|
__ jmp(rdx);
|
|
|
|
__ bind(caller_not_deoptimized);
|
|
}
|
|
|
|
__ remove_activation(vtos, rdx,
|
|
/* throw_monitor_exception */ false,
|
|
/* install_monitor_exception */ false,
|
|
/* notify_jvmdi */ false);
|
|
|
|
// Finish with popframe handling
|
|
// A previous I2C followed by a deoptimization might have moved the
|
|
// outgoing arguments further up the stack. PopFrame expects the
|
|
// mutations to those outgoing arguments to be preserved and other
|
|
// constraints basically require this frame to look exactly as
|
|
// though it had previously invoked an interpreted activation with
|
|
// no space between the top of the expression stack (current
|
|
// last_sp) and the top of stack. Rather than force deopt to
|
|
// maintain this kind of invariant all the time we call a small
|
|
// fixup routine to move the mutated arguments onto the top of our
|
|
// expression stack if necessary.
|
|
__ mov(rax, rsp);
|
|
__ movptr(rbx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
|
|
__ get_thread(thread);
|
|
// PC must point into interpreter here
|
|
__ set_last_Java_frame(thread, noreg, rbp, __ pc());
|
|
__ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), thread, rax, rbx);
|
|
__ get_thread(thread);
|
|
__ reset_last_Java_frame(thread, true, true);
|
|
// Restore the last_sp and null it out
|
|
__ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
|
|
__ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
|
|
|
|
__ restore_bcp();
|
|
__ restore_locals();
|
|
// The method data pointer was incremented already during
|
|
// call profiling. We have to restore the mdp for the current bcp.
|
|
if (ProfileInterpreter) {
|
|
__ set_method_data_pointer_for_bcp();
|
|
}
|
|
|
|
// Clear the popframe condition flag
|
|
__ get_thread(thread);
|
|
__ movl(Address(thread, JavaThread::popframe_condition_offset()), JavaThread::popframe_inactive);
|
|
|
|
__ dispatch_next(vtos);
|
|
// end of PopFrame support
|
|
|
|
Interpreter::_remove_activation_entry = __ pc();
|
|
|
|
// preserve exception over this code sequence
|
|
__ pop_ptr(rax);
|
|
__ get_thread(thread);
|
|
__ movptr(Address(thread, JavaThread::vm_result_offset()), rax);
|
|
// remove the activation (without doing throws on illegalMonitorExceptions)
|
|
__ remove_activation(vtos, rdx, false, true, false);
|
|
// restore exception
|
|
__ get_thread(thread);
|
|
__ get_vm_result(rax, thread);
|
|
|
|
// Inbetween activations - previous activation type unknown yet
|
|
// compute continuation point - the continuation point expects
|
|
// the following registers set up:
|
|
//
|
|
// rax: exception
|
|
// rdx: return address/pc that threw exception
|
|
// rsp: expression stack of caller
|
|
// rbp: rbp, of caller
|
|
__ push(rax); // save exception
|
|
__ push(rdx); // save return address
|
|
__ super_call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), thread, rdx);
|
|
__ mov(rbx, rax); // save exception handler
|
|
__ pop(rdx); // restore return address
|
|
__ pop(rax); // restore exception
|
|
// Note that an "issuing PC" is actually the next PC after the call
|
|
__ jmp(rbx); // jump to exception handler of caller
|
|
}
|
|
|
|
|
|
//
|
|
// JVMTI ForceEarlyReturn support
|
|
//
|
|
address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
|
|
address entry = __ pc();
|
|
const Register thread = rcx;
|
|
|
|
__ restore_bcp();
|
|
__ restore_locals();
|
|
__ empty_expression_stack();
|
|
__ empty_FPU_stack();
|
|
__ load_earlyret_value(state);
|
|
|
|
__ get_thread(thread);
|
|
__ movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
|
|
const Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset());
|
|
|
|
// Clear the earlyret state
|
|
__ movl(cond_addr, JvmtiThreadState::earlyret_inactive);
|
|
|
|
__ remove_activation(state, rsi,
|
|
false, /* throw_monitor_exception */
|
|
false, /* install_monitor_exception */
|
|
true); /* notify_jvmdi */
|
|
__ jmp(rsi);
|
|
return entry;
|
|
} // end of ForceEarlyReturn support
|
|
|
|
|
|
//------------------------------------------------------------------------------------------------------------------------
|
|
// Helper for vtos entry point generation
|
|
|
|
void TemplateInterpreterGenerator::set_vtos_entry_points (Template* t, address& bep, address& cep, address& sep, address& aep, address& iep, address& lep, address& fep, address& dep, address& vep) {
|
|
assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
|
|
Label L;
|
|
fep = __ pc(); __ push(ftos); __ jmp(L);
|
|
dep = __ pc(); __ push(dtos); __ jmp(L);
|
|
lep = __ pc(); __ push(ltos); __ jmp(L);
|
|
aep = __ pc(); __ push(atos); __ jmp(L);
|
|
bep = cep = sep = // fall through
|
|
iep = __ pc(); __ push(itos); // fall through
|
|
vep = __ pc(); __ bind(L); // fall through
|
|
generate_and_dispatch(t);
|
|
}
|
|
|
|
//------------------------------------------------------------------------------------------------------------------------
|
|
// Generation of individual instructions
|
|
|
|
// helpers for generate_and_dispatch
|
|
|
|
|
|
|
|
InterpreterGenerator::InterpreterGenerator(StubQueue* code)
|
|
: TemplateInterpreterGenerator(code) {
|
|
generate_all(); // down here so it can be "virtual"
|
|
}
|
|
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//------------------------------------------------------------------------------------------------------------------------
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// Non-product code
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#ifndef PRODUCT
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address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
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address entry = __ pc();
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// prepare expression stack
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__ pop(rcx); // pop return address so expression stack is 'pure'
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__ push(state); // save tosca
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// pass tosca registers as arguments & call tracer
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__ call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode), rcx, rax, rdx);
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__ mov(rcx, rax); // make sure return address is not destroyed by pop(state)
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__ pop(state); // restore tosca
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// return
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__ jmp(rcx);
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return entry;
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}
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void TemplateInterpreterGenerator::count_bytecode() {
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__ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value));
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}
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void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
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__ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()]));
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}
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void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
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__ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx);
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__ shrl(rbx, BytecodePairHistogram::log2_number_of_codes);
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__ orl(rbx, ((int)t->bytecode()) << BytecodePairHistogram::log2_number_of_codes);
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ExternalAddress table((address) BytecodePairHistogram::_counters);
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Address index(noreg, rbx, Address::times_4);
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__ incrementl(ArrayAddress(table, index));
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}
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void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
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// Call a little run-time stub to avoid blow-up for each bytecode.
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// The run-time runtime saves the right registers, depending on
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// the tosca in-state for the given template.
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assert(Interpreter::trace_code(t->tos_in()) != NULL,
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"entry must have been generated");
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__ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
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}
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void TemplateInterpreterGenerator::stop_interpreter_at() {
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Label L;
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__ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value),
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StopInterpreterAt);
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__ jcc(Assembler::notEqual, L);
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__ int3();
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__ bind(L);
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}
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#endif // !PRODUCT
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#endif // CC_INTERP
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