author | coleenp |
Fri, 16 Mar 2018 09:12:13 -0400 | |
changeset 49449 | ef5d5d343e2a |
parent 48585 | d9fcb7ba8133 |
child 49480 | d7df2dd501ce |
permissions | -rw-r--r-- |
42065 | 1 |
/* |
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* Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved. |
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* Copyright (c) 2016, 2017, SAP SE. 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 "jvm.h" |
42065 | 28 |
#include "asm/macroAssembler.inline.hpp" |
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#include "classfile/javaClasses.inline.hpp" |
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#include "interpreter/interpreter.hpp" |
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#include "memory/allocation.inline.hpp" |
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#include "memory/resourceArea.hpp" |
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#include "prims/methodHandles.hpp" |
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#include "utilities/preserveException.hpp" |
42065 | 35 |
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#ifdef PRODUCT |
|
37 |
#define __ _masm-> |
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38 |
#define BLOCK_COMMENT(str) /* nothing */ |
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39 |
#else |
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#define __ (Verbose ? (_masm->block_comment(FILE_AND_LINE),_masm):_masm)-> |
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#define BLOCK_COMMENT(str) __ block_comment(str) |
|
42 |
#endif |
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||
44 |
#define BIND(label) bind(label); BLOCK_COMMENT(#label ":") |
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||
46 |
// Workaround for C++ overloading nastiness on '0' for RegisterOrConstant. |
|
47 |
static RegisterOrConstant constant(int value) { |
|
48 |
return RegisterOrConstant(value); |
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49 |
} |
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50 |
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51 |
void MethodHandles::load_klass_from_Class(MacroAssembler* _masm, Register klass_reg, |
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Register temp_reg, Register temp2_reg) { |
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if (VerifyMethodHandles) { |
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verify_klass(_masm, klass_reg, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_Class), |
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temp_reg, temp2_reg, "MH argument is a Class"); |
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} |
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__ z_lg(klass_reg, Address(klass_reg, java_lang_Class::klass_offset_in_bytes())); |
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} |
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#ifdef ASSERT |
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static int check_nonzero(const char* xname, int x) { |
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assert(x != 0, "%s should be nonzero", xname); |
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return x; |
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} |
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#define NONZERO(x) check_nonzero(#x, x) |
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#else |
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#define NONZERO(x) (x) |
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#endif |
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#ifdef ASSERT |
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void MethodHandles::verify_klass(MacroAssembler* _masm, |
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Register obj_reg, SystemDictionary::WKID klass_id, |
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Register temp_reg, Register temp2_reg, |
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const char* error_message) { |
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InstanceKlass** klass_addr = SystemDictionary::well_known_klass_addr(klass_id); |
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Klass* klass = SystemDictionary::well_known_klass(klass_id); |
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assert(temp_reg != Z_R0 && // Is used as base register! |
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temp_reg != noreg && temp2_reg != noreg, "need valid registers!"); |
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NearLabel L_ok, L_bad; |
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BLOCK_COMMENT("verify_klass {"); |
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__ verify_oop(obj_reg); |
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__ compareU64_and_branch(obj_reg, (intptr_t)0L, Assembler::bcondEqual, L_bad); |
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__ load_klass(temp_reg, obj_reg); |
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// klass_addr is a klass in allstatic SystemDictionaryHandles. Can't get GCed. |
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__ load_const_optimized(temp2_reg, (address)klass_addr); |
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__ z_lg(temp2_reg, Address(temp2_reg)); |
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__ compareU64_and_branch(temp_reg, temp2_reg, Assembler::bcondEqual, L_ok); |
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intptr_t super_check_offset = klass->super_check_offset(); |
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__ z_lg(temp_reg, Address(temp_reg, super_check_offset)); |
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__ compareU64_and_branch(temp_reg, temp2_reg, Assembler::bcondEqual, L_ok); |
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__ BIND(L_bad); |
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__ stop(error_message); |
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__ BIND(L_ok); |
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BLOCK_COMMENT("} verify_klass"); |
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} |
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void MethodHandles::verify_ref_kind(MacroAssembler* _masm, int ref_kind, |
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Register member_reg, Register temp ) { |
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NearLabel L; |
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BLOCK_COMMENT("verify_ref_kind {"); |
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__ z_llgf(temp, |
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Address(member_reg, |
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NONZERO(java_lang_invoke_MemberName::flags_offset_in_bytes()))); |
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__ z_srl(temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT); |
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__ z_nilf(temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK); |
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__ compare32_and_branch(temp, constant(ref_kind), Assembler::bcondEqual, L); |
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{ |
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char *buf = NEW_C_HEAP_ARRAY(char, 100, mtInternal); |
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jio_snprintf(buf, 100, "verify_ref_kind expected %x", ref_kind); |
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if (ref_kind == JVM_REF_invokeVirtual || ref_kind == JVM_REF_invokeSpecial) { |
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// Could do this for all ref_kinds, but would explode assembly code size. |
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trace_method_handle(_masm, buf); |
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} |
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__ stop(buf); |
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} |
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127 |
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BLOCK_COMMENT("} verify_ref_kind"); |
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__ bind(L); |
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} |
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#endif // ASSERT |
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void MethodHandles::jump_from_method_handle(MacroAssembler* _masm, Register method, Register target, |
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Register temp, bool for_compiler_entry) { |
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assert(method == Z_method, "interpreter calling convention"); |
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__ verify_method_ptr(method); |
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assert(target != method, "don 't you kill the method reg!"); |
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Label L_no_such_method; |
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if (!for_compiler_entry && JvmtiExport::can_post_interpreter_events()) { |
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// JVMTI events, such as single-stepping, are implemented partly |
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// by avoiding running compiled code in threads for which the |
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// event is enabled. Check here for interp_only_mode if these |
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// events CAN be enabled. |
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__ verify_thread(); |
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Label run_compiled_code; |
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151 |
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__ load_and_test_int(temp, Address(Z_thread, JavaThread::interp_only_mode_offset())); |
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__ z_bre(run_compiled_code); |
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// Null method test is replicated below in compiled case, |
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// it might be able to address across the verify_thread(). |
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__ z_ltgr(temp, method); |
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__ z_bre(L_no_such_method); |
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__ z_lg(target, Address(method, Method::interpreter_entry_offset())); |
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__ z_br(target); |
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162 |
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__ bind(run_compiled_code); |
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} |
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// Compiled case, either static or fall-through from runtime conditional. |
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__ z_ltgr(temp, method); |
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__ z_bre(L_no_such_method); |
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ByteSize offset = for_compiler_entry ? |
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Method::from_compiled_offset() : Method::from_interpreted_offset(); |
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Address method_from(method, offset); |
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173 |
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__ z_lg(target, method_from); |
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__ z_br(target); |
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176 |
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__ bind(L_no_such_method); |
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assert(StubRoutines::throw_AbstractMethodError_entry() != NULL, "not yet generated!"); |
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__ load_const_optimized(target, StubRoutines::throw_AbstractMethodError_entry()); |
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__ z_br(target); |
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} |
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183 |
void MethodHandles::jump_to_lambda_form(MacroAssembler* _masm, |
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Register recv, Register method_temp, |
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Register temp2, Register temp3, |
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bool for_compiler_entry) { |
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187 |
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// This is the initial entry point of a lazy method handle. |
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// After type checking, it picks up the invoker from the LambdaForm. |
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assert_different_registers(recv, method_temp, temp2, temp3); |
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assert(method_temp == Z_method, "required register for loading method"); |
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192 |
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BLOCK_COMMENT("jump_to_lambda_form {"); |
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194 |
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195 |
// Load the invoker, as MH -> MH.form -> LF.vmentry |
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__ verify_oop(recv); |
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__ load_heap_oop(method_temp, |
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Address(recv, |
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NONZERO(java_lang_invoke_MethodHandle::form_offset_in_bytes()))); |
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__ verify_oop(method_temp); |
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201 |
__ load_heap_oop(method_temp, |
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Address(method_temp, |
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NONZERO(java_lang_invoke_LambdaForm::vmentry_offset_in_bytes()))); |
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__ verify_oop(method_temp); |
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__ load_heap_oop(method_temp, |
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Address(method_temp, |
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NONZERO(java_lang_invoke_MemberName::method_offset_in_bytes()))); |
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__ verify_oop(method_temp); |
42065 | 209 |
__ z_lg(method_temp, |
210 |
Address(method_temp, |
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NONZERO(java_lang_invoke_ResolvedMethodName::vmtarget_offset_in_bytes()))); |
42065 | 212 |
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213 |
if (VerifyMethodHandles && !for_compiler_entry) { |
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214 |
// Make sure recv is already on stack. |
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215 |
NearLabel L; |
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216 |
Address paramSize(temp2, ConstMethod::size_of_parameters_offset()); |
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217 |
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218 |
__ z_lg(temp2, Address(method_temp, Method::const_offset())); |
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219 |
__ load_sized_value(temp2, paramSize, sizeof(u2), /*is_signed*/ false); |
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// if (temp2 != recv) stop |
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221 |
__ z_lg(temp2, __ argument_address(temp2, temp2, 0)); |
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__ compare64_and_branch(temp2, recv, Assembler::bcondEqual, L); |
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223 |
__ stop("receiver not on stack"); |
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224 |
__ BIND(L); |
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225 |
} |
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226 |
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227 |
jump_from_method_handle(_masm, method_temp, temp2, Z_R0, for_compiler_entry); |
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228 |
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229 |
BLOCK_COMMENT("} jump_to_lambda_form"); |
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230 |
} |
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231 |
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232 |
// code generation |
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233 |
address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm, |
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234 |
vmIntrinsics::ID iid) { |
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235 |
const bool not_for_compiler_entry = false; // This is the interpreter entry. |
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236 |
assert(is_signature_polymorphic(iid), "expected invoke iid"); |
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237 |
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238 |
if (iid == vmIntrinsics::_invokeGeneric || iid == vmIntrinsics::_compiledLambdaForm) { |
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239 |
// Perhaps surprisingly, the symbolic references visible to Java |
|
240 |
// are not directly used. They are linked to Java-generated |
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241 |
// adapters via MethodHandleNatives.linkMethod. They all allow an |
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242 |
// appendix argument. |
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243 |
__ should_not_reach_here(); // Empty stubs make SG sick. |
|
244 |
return NULL; |
|
245 |
} |
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246 |
||
247 |
// Z_R10: sender SP (must preserve; see prepare_to_jump_from_interprted) |
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248 |
// Z_method: method |
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249 |
// Z_ARG1 (Gargs): incoming argument list (must preserve) |
|
250 |
Register Z_R4_param_size = Z_R4; // size of parameters |
|
251 |
address code_start = __ pc(); |
|
252 |
||
253 |
// Here is where control starts out: |
|
254 |
__ align(CodeEntryAlignment); |
|
255 |
||
256 |
address entry_point = __ pc(); |
|
257 |
||
258 |
if (VerifyMethodHandles) { |
|
259 |
Label L; |
|
260 |
BLOCK_COMMENT("verify_intrinsic_id {"); |
|
261 |
||
262 |
// Supplement to 8139891: _intrinsic_id exceeded 1-byte size limit. |
|
263 |
if (Method::intrinsic_id_size_in_bytes() == 1) { |
|
264 |
__ z_cli(Address(Z_method, Method::intrinsic_id_offset_in_bytes()), (int)iid); |
|
265 |
} else { |
|
266 |
assert(Method::intrinsic_id_size_in_bytes() == 2, "size error: check Method::_intrinsic_id"); |
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267 |
__ z_lh(Z_R0_scratch, Address(Z_method, Method::intrinsic_id_offset_in_bytes())); |
|
268 |
__ z_chi(Z_R0_scratch, (int)iid); |
|
269 |
} |
|
270 |
__ z_bre(L); |
|
271 |
||
272 |
if (iid == vmIntrinsics::_linkToVirtual || iid == vmIntrinsics::_linkToSpecial) { |
|
273 |
// Could do this for all kinds, but would explode assembly code size. |
|
274 |
trace_method_handle(_masm, "bad Method::intrinsic_id"); |
|
275 |
} |
|
276 |
||
277 |
__ stop("bad Method::intrinsic_id"); |
|
278 |
__ bind(L); |
|
279 |
||
280 |
BLOCK_COMMENT("} verify_intrinsic_id"); |
|
281 |
} |
|
282 |
||
283 |
// First task: Find out how big the argument list is. |
|
284 |
Address Z_R4_first_arg_addr; |
|
285 |
int ref_kind = signature_polymorphic_intrinsic_ref_kind(iid); |
|
286 |
||
287 |
assert(ref_kind != 0 || iid == vmIntrinsics::_invokeBasic, |
|
288 |
"must be _invokeBasic or a linkTo intrinsic"); |
|
289 |
||
290 |
if (ref_kind == 0 || MethodHandles::ref_kind_has_receiver(ref_kind)) { |
|
291 |
Address paramSize(Z_R1_scratch, ConstMethod::size_of_parameters_offset()); |
|
292 |
||
293 |
__ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset())); |
|
294 |
__ load_sized_value(Z_R4_param_size, paramSize, sizeof(u2), /*is_signed*/ false); |
|
295 |
Z_R4_first_arg_addr = __ argument_address(Z_R4_param_size, Z_R4_param_size, 0); |
|
296 |
} else { |
|
297 |
DEBUG_ONLY(Z_R4_param_size = noreg); |
|
298 |
} |
|
299 |
||
300 |
Register Z_mh = noreg; |
|
301 |
if (!is_signature_polymorphic_static(iid)) { |
|
302 |
Z_mh = Z_ARG4; |
|
303 |
__ z_lg(Z_mh, Z_R4_first_arg_addr); |
|
304 |
DEBUG_ONLY(Z_R4_param_size = noreg); |
|
305 |
} |
|
306 |
||
307 |
// Z_R4_first_arg_addr is live! |
|
308 |
||
309 |
trace_method_handle_interpreter_entry(_masm, iid); |
|
310 |
||
311 |
if (iid == vmIntrinsics::_invokeBasic) { |
|
312 |
__ pc(); // just for the block comment |
|
313 |
generate_method_handle_dispatch(_masm, iid, Z_mh, noreg, not_for_compiler_entry); |
|
314 |
} else { |
|
315 |
// Adjust argument list by popping the trailing MemberName argument. |
|
316 |
Register Z_recv = noreg; |
|
317 |
||
318 |
if (MethodHandles::ref_kind_has_receiver(ref_kind)) { |
|
319 |
// Load the receiver (not the MH; the actual MemberName's receiver) |
|
320 |
// up from the interpreter stack. |
|
321 |
__ z_lg(Z_recv = Z_R5, Z_R4_first_arg_addr); |
|
322 |
DEBUG_ONLY(Z_R4_param_size = noreg); |
|
323 |
} |
|
324 |
||
325 |
Register Z_member = Z_method; // MemberName ptr; incoming method ptr is dead now |
|
326 |
||
327 |
__ z_lg(Z_member, __ argument_address(constant(1))); |
|
328 |
__ add2reg(Z_esp, Interpreter::stackElementSize); |
|
329 |
generate_method_handle_dispatch(_masm, iid, Z_recv, Z_member, not_for_compiler_entry); |
|
330 |
} |
|
331 |
||
332 |
return entry_point; |
|
333 |
} |
|
334 |
||
335 |
void MethodHandles::generate_method_handle_dispatch(MacroAssembler* _masm, |
|
336 |
vmIntrinsics::ID iid, |
|
337 |
Register receiver_reg, |
|
338 |
Register member_reg, |
|
339 |
bool for_compiler_entry) { |
|
340 |
assert(is_signature_polymorphic(iid), "expected invoke iid"); |
|
341 |
||
342 |
Register temp1 = for_compiler_entry ? Z_R10 : Z_R6; |
|
343 |
Register temp2 = Z_R12; |
|
344 |
Register temp3 = Z_R11; |
|
345 |
Register temp4 = Z_R13; |
|
346 |
||
347 |
if (for_compiler_entry) { |
|
348 |
assert(receiver_reg == (iid == vmIntrinsics::_linkToStatic ? noreg : Z_ARG1), |
|
349 |
"only valid assignment"); |
|
350 |
} |
|
351 |
if (receiver_reg != noreg) { |
|
352 |
assert_different_registers(temp1, temp2, temp3, temp4, receiver_reg); |
|
353 |
} |
|
354 |
if (member_reg != noreg) { |
|
355 |
assert_different_registers(temp1, temp2, temp3, temp4, member_reg); |
|
356 |
} |
|
357 |
if (!for_compiler_entry) { // Don't trash last SP. |
|
358 |
assert_different_registers(temp1, temp2, temp3, temp4, Z_R10); |
|
359 |
} |
|
360 |
||
361 |
if (iid == vmIntrinsics::_invokeBasic) { |
|
362 |
__ pc(); // Just for the block comment. |
|
363 |
// Indirect through MH.form.vmentry.vmtarget. |
|
364 |
jump_to_lambda_form(_masm, receiver_reg, Z_method, Z_R1, temp3, for_compiler_entry); |
|
365 |
return; |
|
366 |
} |
|
367 |
||
368 |
// The method is a member invoker used by direct method handles. |
|
369 |
if (VerifyMethodHandles) { |
|
370 |
// Make sure the trailing argument really is a MemberName (caller responsibility). |
|
371 |
verify_klass(_masm, member_reg, |
|
372 |
SystemDictionary::WK_KLASS_ENUM_NAME(MemberName_klass), |
|
373 |
temp1, temp2, |
|
374 |
"MemberName required for invokeVirtual etc."); |
|
375 |
} |
|
376 |
||
377 |
Address member_clazz( member_reg, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes())); |
|
378 |
Address member_vmindex( member_reg, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes())); |
|
46505
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46345
diff
changeset
|
379 |
Address member_vmtarget(member_reg, NONZERO(java_lang_invoke_MemberName::method_offset_in_bytes())); |
fd4bc78630b1
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parents:
46345
diff
changeset
|
380 |
Address vmtarget_method(Z_method, NONZERO(java_lang_invoke_ResolvedMethodName::vmtarget_offset_in_bytes())); |
42065 | 381 |
Register temp1_recv_klass = temp1; |
382 |
||
383 |
if (iid != vmIntrinsics::_linkToStatic) { |
|
384 |
__ verify_oop(receiver_reg); |
|
385 |
if (iid == vmIntrinsics::_linkToSpecial) { |
|
386 |
// Don't actually load the klass; just null-check the receiver. |
|
387 |
__ null_check(receiver_reg); |
|
388 |
} else { |
|
389 |
// Load receiver klass itself. |
|
390 |
__ null_check(receiver_reg, Z_R0, oopDesc::klass_offset_in_bytes()); |
|
391 |
__ load_klass(temp1_recv_klass, receiver_reg); |
|
392 |
__ verify_klass_ptr(temp1_recv_klass); |
|
393 |
} |
|
394 |
BLOCK_COMMENT("check_receiver {"); |
|
395 |
// The receiver for the MemberName must be in receiver_reg. |
|
396 |
// Check the receiver against the MemberName.clazz. |
|
397 |
if (VerifyMethodHandles && iid == vmIntrinsics::_linkToSpecial) { |
|
398 |
// Did not load it above... |
|
399 |
__ load_klass(temp1_recv_klass, receiver_reg); |
|
400 |
__ verify_klass_ptr(temp1_recv_klass); |
|
401 |
} |
|
402 |
||
403 |
if (VerifyMethodHandles && iid != vmIntrinsics::_linkToInterface) { |
|
404 |
NearLabel L_ok; |
|
405 |
Register temp2_defc = temp2; |
|
406 |
||
407 |
__ load_heap_oop(temp2_defc, member_clazz); |
|
408 |
load_klass_from_Class(_masm, temp2_defc, temp3, temp4); |
|
409 |
__ verify_klass_ptr(temp2_defc); |
|
410 |
__ check_klass_subtype(temp1_recv_klass, temp2_defc, temp3, temp4, L_ok); |
|
411 |
// If we get here, the type check failed! |
|
412 |
__ stop("receiver class disagrees with MemberName.clazz"); |
|
413 |
__ bind(L_ok); |
|
414 |
} |
|
415 |
BLOCK_COMMENT("} check_receiver"); |
|
416 |
} |
|
417 |
if (iid == vmIntrinsics::_linkToSpecial || iid == vmIntrinsics::_linkToStatic) { |
|
418 |
DEBUG_ONLY(temp1_recv_klass = noreg); // These guys didn't load the recv_klass. |
|
419 |
} |
|
420 |
||
421 |
// Live registers at this point: |
|
422 |
// member_reg - MemberName that was the trailing argument. |
|
423 |
// temp1_recv_klass - Klass of stacked receiver, if needed. |
|
424 |
// Z_R10 - Interpreter linkage if interpreted. |
|
425 |
||
426 |
bool method_is_live = false; |
|
427 |
||
428 |
switch (iid) { |
|
429 |
case vmIntrinsics::_linkToSpecial: |
|
430 |
if (VerifyMethodHandles) { |
|
431 |
verify_ref_kind(_masm, JVM_REF_invokeSpecial, member_reg, temp3); |
|
432 |
} |
|
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fd4bc78630b1
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coleenp
parents:
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diff
changeset
|
433 |
__ load_heap_oop(Z_method, member_vmtarget); |
fd4bc78630b1
8174749: Use hash table/oops for MemberName table
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parents:
46345
diff
changeset
|
434 |
__ z_lg(Z_method, vmtarget_method); |
42065 | 435 |
method_is_live = true; |
436 |
break; |
|
437 |
||
438 |
case vmIntrinsics::_linkToStatic: |
|
439 |
if (VerifyMethodHandles) { |
|
440 |
verify_ref_kind(_masm, JVM_REF_invokeStatic, member_reg, temp3); |
|
441 |
} |
|
46505
fd4bc78630b1
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parents:
46345
diff
changeset
|
442 |
__ load_heap_oop(Z_method, member_vmtarget); |
fd4bc78630b1
8174749: Use hash table/oops for MemberName table
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parents:
46345
diff
changeset
|
443 |
__ z_lg(Z_method, vmtarget_method); |
42065 | 444 |
method_is_live = true; |
445 |
break; |
|
446 |
||
447 |
case vmIntrinsics::_linkToVirtual: { |
|
448 |
// Same as TemplateTable::invokevirtual, minus the CP setup and profiling. |
|
449 |
if (VerifyMethodHandles) { |
|
450 |
verify_ref_kind(_masm, JVM_REF_invokeVirtual, member_reg, temp3); |
|
451 |
} |
|
452 |
||
453 |
// Pick out the vtable index from the MemberName, and then we can discard it. |
|
454 |
Register temp2_index = temp2; |
|
455 |
__ z_lg(temp2_index, member_vmindex); |
|
456 |
||
457 |
if (VerifyMethodHandles) { |
|
458 |
// if (member_vmindex < 0) stop |
|
459 |
NearLabel L_index_ok; |
|
460 |
__ compare32_and_branch(temp2_index, constant(0), Assembler::bcondNotLow, L_index_ok); |
|
461 |
__ stop("no virtual index"); |
|
462 |
__ BIND(L_index_ok); |
|
463 |
} |
|
464 |
||
465 |
// Note: The verifier invariants allow us to ignore MemberName.clazz and vmtarget |
|
466 |
// at this point. And VerifyMethodHandles has already checked clazz, if needed. |
|
467 |
||
468 |
// Get target method and entry point. |
|
469 |
__ lookup_virtual_method(temp1_recv_klass, temp2_index, Z_method); |
|
470 |
method_is_live = true; |
|
471 |
break; |
|
472 |
} |
|
473 |
||
474 |
case vmIntrinsics::_linkToInterface: { |
|
475 |
// Same as TemplateTable::invokeinterface, minus the CP setup |
|
476 |
// and profiling, with different argument motion. |
|
477 |
if (VerifyMethodHandles) { |
|
478 |
verify_ref_kind(_masm, JVM_REF_invokeInterface, member_reg, temp3); |
|
479 |
} |
|
480 |
||
481 |
Register temp3_intf = temp3; |
|
482 |
||
483 |
__ load_heap_oop(temp3_intf, member_clazz); |
|
484 |
load_klass_from_Class(_masm, temp3_intf, temp2, temp4); |
|
485 |
||
486 |
Register Z_index = Z_method; |
|
487 |
||
488 |
__ z_lg(Z_index, member_vmindex); |
|
489 |
||
490 |
if (VerifyMethodHandles) { |
|
491 |
NearLabel L; |
|
492 |
// if (member_vmindex < 0) stop |
|
493 |
__ compare32_and_branch(Z_index, constant(0), Assembler::bcondNotLow, L); |
|
494 |
__ stop("invalid vtable index for MH.invokeInterface"); |
|
495 |
__ bind(L); |
|
496 |
} |
|
497 |
||
498 |
// Given interface, index, and recv klass, dispatch to the implementation method. |
|
499 |
Label L_no_such_interface; |
|
500 |
__ lookup_interface_method(temp1_recv_klass, temp3_intf, |
|
501 |
// Note: next two args must be the same: |
|
48585
d9fcb7ba8133
8191907: PPC64 and s390 parts of JDK-8174962: Better interface invocations
mdoerr
parents:
47765
diff
changeset
|
502 |
Z_index, Z_method, temp2, |
42065 | 503 |
L_no_such_interface); |
504 |
jump_from_method_handle(_masm, Z_method, temp2, Z_R0, for_compiler_entry); |
|
505 |
||
506 |
__ bind(L_no_such_interface); |
|
507 |
||
508 |
// Throw exception. |
|
509 |
__ load_const_optimized(Z_R1, StubRoutines::throw_IncompatibleClassChangeError_entry()); |
|
510 |
__ z_br(Z_R1); |
|
511 |
break; |
|
512 |
} |
|
513 |
||
514 |
default: |
|
515 |
fatal("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid)); |
|
516 |
break; |
|
517 |
} |
|
518 |
||
519 |
if (method_is_live) { |
|
520 |
// Live at this point: Z_method, O5_savedSP (if interpreted). |
|
521 |
||
522 |
// After figuring out which concrete method to call, jump into it. |
|
523 |
// Note that this works in the interpreter with no data motion. |
|
524 |
// But the compiled version will require that rcx_recv be shifted out. |
|
525 |
jump_from_method_handle(_masm, Z_method, temp1, Z_R0, for_compiler_entry); |
|
526 |
} |
|
527 |
} |
|
528 |
||
529 |
#ifndef PRODUCT |
|
530 |
void trace_method_handle_stub(const char* adaptername, |
|
531 |
oopDesc* mh, |
|
532 |
intptr_t* sender_sp, |
|
533 |
intptr_t* args, |
|
534 |
intptr_t* tracing_fp) { |
|
535 |
bool has_mh = (strstr(adaptername, "/static") == NULL && |
|
536 |
strstr(adaptername, "linkTo") == NULL); // Static linkers don't have MH. |
|
537 |
const char* mh_reg_name = has_mh ? "Z_R4_mh" : "Z_R4"; |
|
538 |
tty->print_cr("MH %s %s=" INTPTR_FORMAT " sender_sp=" INTPTR_FORMAT " args=" INTPTR_FORMAT, |
|
539 |
adaptername, mh_reg_name, |
|
540 |
p2i(mh), p2i(sender_sp), p2i(args)); |
|
541 |
||
542 |
if (Verbose) { |
|
543 |
// Dumping last frame with frame::describe. |
|
544 |
||
545 |
JavaThread* p = JavaThread::active(); |
|
546 |
||
547 |
ResourceMark rm; |
|
548 |
PRESERVE_EXCEPTION_MARK; // May not be needed by safer and unexpensive here. |
|
549 |
FrameValues values; |
|
550 |
||
551 |
// Note: We want to allow trace_method_handle from any call site. |
|
552 |
// While trace_method_handle creates a frame, it may be entered |
|
553 |
// without a valid return PC in Z_R14 (e.g. not just after a call). |
|
554 |
// Walking that frame could lead to failures due to that invalid PC. |
|
555 |
// => carefully detect that frame when doing the stack walking. |
|
556 |
||
557 |
// Walk up to the right frame using the "tracing_fp" argument. |
|
558 |
frame cur_frame = os::current_frame(); // Current C frame. |
|
559 |
||
560 |
while (cur_frame.fp() != tracing_fp) { |
|
561 |
cur_frame = os::get_sender_for_C_frame(&cur_frame); |
|
562 |
} |
|
563 |
||
564 |
// Safely create a frame and call frame::describe. |
|
565 |
intptr_t *dump_sp = cur_frame.sender_sp(); |
|
566 |
intptr_t *dump_fp = cur_frame.link(); |
|
567 |
||
568 |
bool walkable = has_mh; // Whether the traced frame shoud be walkable. |
|
569 |
||
570 |
// The sender for cur_frame is the caller of trace_method_handle. |
|
571 |
if (walkable) { |
|
572 |
// The previous definition of walkable may have to be refined |
|
573 |
// if new call sites cause the next frame constructor to start |
|
574 |
// failing. Alternatively, frame constructors could be |
|
575 |
// modified to support the current or future non walkable |
|
576 |
// frames (but this is more intrusive and is not considered as |
|
577 |
// part of this RFE, which will instead use a simpler output). |
|
578 |
frame dump_frame = frame(dump_sp); |
|
579 |
dump_frame.describe(values, 1); |
|
580 |
} else { |
|
581 |
// Robust dump for frames which cannot be constructed from sp/younger_sp |
|
582 |
// Add descriptions without building a Java frame to avoid issues. |
|
583 |
values.describe(-1, dump_fp, "fp for #1 <not parsed, cannot trust pc>"); |
|
584 |
values.describe(-1, dump_sp, "sp"); |
|
585 |
} |
|
586 |
||
587 |
bool has_args = has_mh; // Whether Z_esp is meaningful. |
|
588 |
||
589 |
// Mark args, if seems valid (may not be valid for some adapters). |
|
590 |
if (has_args) { |
|
591 |
if ((args >= dump_sp) && (args < dump_fp)) { |
|
592 |
values.describe(-1, args, "*Z_esp"); |
|
593 |
} |
|
594 |
} |
|
595 |
||
596 |
// Note: the unextended_sp may not be correct. |
|
597 |
tty->print_cr(" stack layout:"); |
|
598 |
values.print(p); |
|
46968
9119841280f4
8160399: is_oop_or_null involves undefined behavior
coleenp
parents:
46706
diff
changeset
|
599 |
if (has_mh && oopDesc::is_oop(mh)) { |
42065 | 600 |
mh->print(); |
601 |
if (java_lang_invoke_MethodHandle::is_instance(mh)) { |
|
602 |
if (java_lang_invoke_MethodHandle::form_offset_in_bytes() != 0) { |
|
603 |
java_lang_invoke_MethodHandle::form(mh)->print(); |
|
604 |
} |
|
605 |
} |
|
606 |
} |
|
607 |
} |
|
608 |
} |
|
609 |
||
610 |
void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) { |
|
611 |
if (!TraceMethodHandles) { return; } |
|
612 |
||
46706
430bc59337b1
8184267: Restore register from stack uses wrong offset
lucy
parents:
46560
diff
changeset
|
613 |
// If arg registers are contiguous, we can use STMG/LMG. |
430bc59337b1
8184267: Restore register from stack uses wrong offset
lucy
parents:
46560
diff
changeset
|
614 |
assert((Z_ARG5->encoding() - Z_ARG1->encoding() + 1) == RegisterImpl::number_of_arg_registers, "Oops"); |
430bc59337b1
8184267: Restore register from stack uses wrong offset
lucy
parents:
46560
diff
changeset
|
615 |
|
42065 | 616 |
BLOCK_COMMENT("trace_method_handle {"); |
617 |
||
618 |
// Save argument registers (they are used in raise exception stub). |
|
46706
430bc59337b1
8184267: Restore register from stack uses wrong offset
lucy
parents:
46560
diff
changeset
|
619 |
// Argument registers have contiguous register numbers -> we can use stmg/lmg. |
430bc59337b1
8184267: Restore register from stack uses wrong offset
lucy
parents:
46560
diff
changeset
|
620 |
__ z_stmg(Z_ARG1, Z_ARG5, 16, Z_SP); |
42065 | 621 |
|
622 |
// Setup arguments. |
|
623 |
__ z_lgr(Z_ARG2, Z_ARG4); // mh, see generate_method_handle_interpreter_entry() |
|
624 |
__ z_lgr(Z_ARG3, Z_R10); // sender_sp |
|
625 |
__ z_lgr(Z_ARG4, Z_esp); |
|
626 |
__ load_const_optimized(Z_ARG1, (void *)adaptername); |
|
627 |
__ z_lgr(Z_ARG5, Z_SP); // tracing_fp |
|
628 |
__ save_return_pc(); // saves Z_R14 |
|
629 |
__ push_frame_abi160(0); |
|
630 |
__ call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub)); |
|
631 |
__ pop_frame(); |
|
632 |
__ restore_return_pc(); // restores to Z_R14 |
|
46706
430bc59337b1
8184267: Restore register from stack uses wrong offset
lucy
parents:
46560
diff
changeset
|
633 |
|
430bc59337b1
8184267: Restore register from stack uses wrong offset
lucy
parents:
46560
diff
changeset
|
634 |
// Restore argument registers |
430bc59337b1
8184267: Restore register from stack uses wrong offset
lucy
parents:
46560
diff
changeset
|
635 |
__ z_lmg(Z_ARG1, Z_ARG5, 16, Z_SP); |
42065 | 636 |
__ zap_from_to(Z_SP, Z_SP, Z_R0, Z_R1, 50, -1); |
637 |
__ zap_from_to(Z_SP, Z_SP, Z_R0, Z_R1, -1, 5); |
|
638 |
||
639 |
BLOCK_COMMENT("} trace_method_handle"); |
|
640 |
} |
|
641 |
#endif // !PRODUCT |