637 lines
25 KiB
C++
637 lines
25 KiB
C++
/*
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* Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "jvm.h"
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#include "asm/macroAssembler.hpp"
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#include "classfile/javaClasses.inline.hpp"
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#include "interpreter/interpreter.hpp"
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#include "interpreter/interpreterRuntime.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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#define __ _masm->
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#ifdef PRODUCT
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#define BLOCK_COMMENT(str) /* nothing */
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#define STOP(error) stop(error)
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#else
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#define BLOCK_COMMENT(str) __ block_comment(str)
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#define STOP(error) block_comment(error); __ stop(error)
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#endif
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#define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
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void MethodHandles::load_klass_from_Class(MacroAssembler* _masm, Register klass_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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"MH argument is a Class");
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__ movptr(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 //ASSERT
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#define NONZERO(x) (x)
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#endif //ASSERT
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#ifdef ASSERT
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void MethodHandles::verify_klass(MacroAssembler* _masm,
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Register obj, SystemDictionary::WKID klass_id,
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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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Register temp = rdi;
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Register temp2 = noreg;
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LP64_ONLY(temp2 = rscratch1); // used by MacroAssembler::cmpptr
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Label L_ok, L_bad;
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BLOCK_COMMENT("verify_klass {");
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__ verify_oop(obj);
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__ testptr(obj, obj);
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__ jcc(Assembler::zero, L_bad);
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__ push(temp); if (temp2 != noreg) __ push(temp2);
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#define UNPUSH { if (temp2 != noreg) __ pop(temp2); __ pop(temp); }
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__ load_klass(temp, obj);
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__ cmpptr(temp, ExternalAddress((address) klass_addr));
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__ jcc(Assembler::equal, L_ok);
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intptr_t super_check_offset = klass->super_check_offset();
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__ movptr(temp, Address(temp, super_check_offset));
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__ cmpptr(temp, ExternalAddress((address) klass_addr));
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__ jcc(Assembler::equal, L_ok);
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UNPUSH;
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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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UNPUSH;
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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, Register member_reg, Register temp) {
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Label L;
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BLOCK_COMMENT("verify_ref_kind {");
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__ movl(temp, Address(member_reg, NONZERO(java_lang_invoke_MemberName::flags_offset_in_bytes())));
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__ shrl(temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT);
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__ andl(temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK);
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__ cmpl(temp, ref_kind);
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__ jcc(Assembler::equal, L);
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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 ||
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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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__ STOP(buf);
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}
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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 temp,
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bool for_compiler_entry) {
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assert(method == rbx, "interpreter calling convention");
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Label L_no_such_method;
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__ testptr(rbx, rbx);
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__ jcc(Assembler::zero, L_no_such_method);
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__ verify_method_ptr(method);
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if (!for_compiler_entry && JvmtiExport::can_post_interpreter_events()) {
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Label run_compiled_code;
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// JVMTI events, such as single-stepping, are implemented partly by avoiding running
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// compiled code in threads for which the event is enabled. Check here for
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// interp_only_mode if these events CAN be enabled.
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#ifdef _LP64
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Register rthread = r15_thread;
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#else
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Register rthread = temp;
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__ get_thread(rthread);
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#endif
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// interp_only is an int, on little endian it is sufficient to test the byte only
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// Is a cmpl faster?
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__ cmpb(Address(rthread, JavaThread::interp_only_mode_offset()), 0);
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__ jccb(Assembler::zero, run_compiled_code);
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__ jmp(Address(method, Method::interpreter_entry_offset()));
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__ BIND(run_compiled_code);
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}
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const ByteSize entry_offset = for_compiler_entry ? Method::from_compiled_offset() :
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Method::from_interpreted_offset();
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__ jmp(Address(method, entry_offset));
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__ bind(L_no_such_method);
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__ jump(RuntimeAddress(StubRoutines::throw_AbstractMethodError_entry()));
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}
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void MethodHandles::jump_to_lambda_form(MacroAssembler* _masm,
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Register recv, Register method_temp,
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Register temp2,
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bool for_compiler_entry) {
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BLOCK_COMMENT("jump_to_lambda_form {");
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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);
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assert(recv != noreg, "required register");
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assert(method_temp == rbx, "required register for loading method");
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//NOT_PRODUCT({ FlagSetting fs(TraceMethodHandles, true); trace_method_handle(_masm, "LZMH"); });
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// 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, Address(recv, NONZERO(java_lang_invoke_MethodHandle::form_offset_in_bytes())));
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__ verify_oop(method_temp);
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__ load_heap_oop(method_temp, Address(method_temp, 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, Address(method_temp, NONZERO(java_lang_invoke_MemberName::method_offset_in_bytes())));
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__ verify_oop(method_temp);
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__ movptr(method_temp, Address(method_temp, NONZERO(java_lang_invoke_ResolvedMethodName::vmtarget_offset_in_bytes())));
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if (VerifyMethodHandles && !for_compiler_entry) {
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// make sure recv is already on stack
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__ movptr(temp2, Address(method_temp, Method::const_offset()));
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__ load_sized_value(temp2,
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Address(temp2, ConstMethod::size_of_parameters_offset()),
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sizeof(u2), /*is_signed*/ false);
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// assert(sizeof(u2) == sizeof(Method::_size_of_parameters), "");
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Label L;
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__ cmpoop(recv, __ argument_address(temp2, -1));
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__ jcc(Assembler::equal, L);
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__ movptr(rax, __ argument_address(temp2, -1));
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__ STOP("receiver not on stack");
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__ BIND(L);
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}
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jump_from_method_handle(_masm, method_temp, temp2, for_compiler_entry);
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BLOCK_COMMENT("} jump_to_lambda_form");
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}
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// Code generation
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address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm,
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vmIntrinsics::ID iid) {
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const bool not_for_compiler_entry = false; // this is the interpreter entry
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assert(is_signature_polymorphic(iid), "expected invoke iid");
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if (iid == vmIntrinsics::_invokeGeneric ||
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iid == vmIntrinsics::_compiledLambdaForm) {
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// Perhaps surprisingly, the symbolic references visible to Java are not directly used.
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// They are linked to Java-generated adapters via MethodHandleNatives.linkMethod.
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// They all allow an appendix argument.
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__ hlt(); // empty stubs make SG sick
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return NULL;
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}
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// rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted)
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// rbx: Method*
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// rdx: argument locator (parameter slot count, added to rsp)
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// rcx: used as temp to hold mh or receiver
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// rax, rdi: garbage temps, blown away
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Register rdx_argp = rdx; // argument list ptr, live on error paths
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Register rax_temp = rax;
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Register rcx_mh = rcx; // MH receiver; dies quickly and is recycled
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Register rbx_method = rbx; // eventual target of this invocation
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// here's where control starts out:
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__ align(CodeEntryAlignment);
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address entry_point = __ pc();
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if (VerifyMethodHandles) {
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assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2");
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Label L;
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BLOCK_COMMENT("verify_intrinsic_id {");
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__ cmpw(Address(rbx_method, Method::intrinsic_id_offset_in_bytes()), (int) iid);
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__ jcc(Assembler::equal, L);
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if (iid == vmIntrinsics::_linkToVirtual ||
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iid == vmIntrinsics::_linkToSpecial) {
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// could do this for all kinds, but would explode assembly code size
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trace_method_handle(_masm, "bad Method*::intrinsic_id");
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}
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__ STOP("bad Method*::intrinsic_id");
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__ bind(L);
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BLOCK_COMMENT("} verify_intrinsic_id");
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}
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// First task: Find out how big the argument list is.
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Address rdx_first_arg_addr;
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int ref_kind = signature_polymorphic_intrinsic_ref_kind(iid);
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assert(ref_kind != 0 || iid == vmIntrinsics::_invokeBasic, "must be _invokeBasic or a linkTo intrinsic");
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if (ref_kind == 0 || MethodHandles::ref_kind_has_receiver(ref_kind)) {
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__ movptr(rdx_argp, Address(rbx_method, Method::const_offset()));
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__ load_sized_value(rdx_argp,
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Address(rdx_argp, ConstMethod::size_of_parameters_offset()),
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sizeof(u2), /*is_signed*/ false);
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// assert(sizeof(u2) == sizeof(Method::_size_of_parameters), "");
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rdx_first_arg_addr = __ argument_address(rdx_argp, -1);
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} else {
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DEBUG_ONLY(rdx_argp = noreg);
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}
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if (!is_signature_polymorphic_static(iid)) {
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__ movptr(rcx_mh, rdx_first_arg_addr);
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DEBUG_ONLY(rdx_argp = noreg);
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}
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// rdx_first_arg_addr is live!
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trace_method_handle_interpreter_entry(_masm, iid);
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if (iid == vmIntrinsics::_invokeBasic) {
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generate_method_handle_dispatch(_masm, iid, rcx_mh, noreg, not_for_compiler_entry);
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} else {
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// Adjust argument list by popping the trailing MemberName argument.
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Register rcx_recv = noreg;
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if (MethodHandles::ref_kind_has_receiver(ref_kind)) {
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// Load the receiver (not the MH; the actual MemberName's receiver) up from the interpreter stack.
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__ movptr(rcx_recv = rcx, rdx_first_arg_addr);
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}
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DEBUG_ONLY(rdx_argp = noreg);
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Register rbx_member = rbx_method; // MemberName ptr; incoming method ptr is dead now
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__ pop(rax_temp); // return address
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__ pop(rbx_member); // extract last argument
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__ push(rax_temp); // re-push return address
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generate_method_handle_dispatch(_masm, iid, rcx_recv, rbx_member, not_for_compiler_entry);
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}
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return entry_point;
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}
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void MethodHandles::generate_method_handle_dispatch(MacroAssembler* _masm,
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vmIntrinsics::ID iid,
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Register receiver_reg,
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Register member_reg,
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bool for_compiler_entry) {
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assert(is_signature_polymorphic(iid), "expected invoke iid");
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Register rbx_method = rbx; // eventual target of this invocation
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// temps used in this code are not used in *either* compiled or interpreted calling sequences
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#ifdef _LP64
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Register temp1 = rscratch1;
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Register temp2 = rscratch2;
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Register temp3 = rax;
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if (for_compiler_entry) {
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assert(receiver_reg == (iid == vmIntrinsics::_linkToStatic ? noreg : j_rarg0), "only valid assignment");
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assert_different_registers(temp1, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5);
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assert_different_registers(temp2, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5);
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assert_different_registers(temp3, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5);
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}
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#else
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Register temp1 = (for_compiler_entry ? rsi : rdx);
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Register temp2 = rdi;
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Register temp3 = rax;
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if (for_compiler_entry) {
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assert(receiver_reg == (iid == vmIntrinsics::_linkToStatic ? noreg : rcx), "only valid assignment");
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assert_different_registers(temp1, rcx, rdx);
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assert_different_registers(temp2, rcx, rdx);
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assert_different_registers(temp3, rcx, rdx);
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}
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#endif
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else {
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assert_different_registers(temp1, temp2, temp3, saved_last_sp_register()); // don't trash lastSP
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}
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assert_different_registers(temp1, temp2, temp3, receiver_reg);
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assert_different_registers(temp1, temp2, temp3, member_reg);
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if (iid == vmIntrinsics::_invokeBasic) {
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// indirect through MH.form.vmentry.vmtarget
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jump_to_lambda_form(_masm, receiver_reg, rbx_method, temp1, for_compiler_entry);
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} else {
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// The method is a member invoker used by direct method handles.
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if (VerifyMethodHandles) {
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// make sure the trailing argument really is a MemberName (caller responsibility)
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verify_klass(_masm, member_reg, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_invoke_MemberName),
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"MemberName required for invokeVirtual etc.");
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}
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Address member_clazz( member_reg, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes()));
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Address member_vmindex( member_reg, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes()));
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Address member_vmtarget( member_reg, NONZERO(java_lang_invoke_MemberName::method_offset_in_bytes()));
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Address vmtarget_method( rbx_method, NONZERO(java_lang_invoke_ResolvedMethodName::vmtarget_offset_in_bytes()));
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Register temp1_recv_klass = temp1;
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if (iid != vmIntrinsics::_linkToStatic) {
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__ verify_oop(receiver_reg);
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if (iid == vmIntrinsics::_linkToSpecial) {
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// Don't actually load the klass; just null-check the receiver.
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__ null_check(receiver_reg);
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} else {
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// load receiver klass itself
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__ null_check(receiver_reg, oopDesc::klass_offset_in_bytes());
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__ load_klass(temp1_recv_klass, receiver_reg);
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__ verify_klass_ptr(temp1_recv_klass);
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}
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BLOCK_COMMENT("check_receiver {");
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// The receiver for the MemberName must be in receiver_reg.
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// Check the receiver against the MemberName.clazz
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if (VerifyMethodHandles && iid == vmIntrinsics::_linkToSpecial) {
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// Did not load it above...
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__ load_klass(temp1_recv_klass, receiver_reg);
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__ verify_klass_ptr(temp1_recv_klass);
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}
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if (VerifyMethodHandles && iid != vmIntrinsics::_linkToInterface) {
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Label L_ok;
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Register temp2_defc = temp2;
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__ load_heap_oop(temp2_defc, member_clazz);
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load_klass_from_Class(_masm, temp2_defc);
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__ verify_klass_ptr(temp2_defc);
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__ check_klass_subtype(temp1_recv_klass, temp2_defc, temp3, L_ok);
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// If we get here, the type check failed!
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__ STOP("receiver class disagrees with MemberName.clazz");
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__ bind(L_ok);
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}
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BLOCK_COMMENT("} check_receiver");
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}
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if (iid == vmIntrinsics::_linkToSpecial ||
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iid == vmIntrinsics::_linkToStatic) {
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DEBUG_ONLY(temp1_recv_klass = noreg); // these guys didn't load the recv_klass
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}
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// Live registers at this point:
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// member_reg - MemberName that was the trailing argument
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// temp1_recv_klass - klass of stacked receiver, if needed
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// rsi/r13 - interpreter linkage (if interpreted)
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// rcx, rdx, rsi, rdi, r8 - compiler arguments (if compiled)
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Label L_incompatible_class_change_error;
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switch (iid) {
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case vmIntrinsics::_linkToSpecial:
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if (VerifyMethodHandles) {
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verify_ref_kind(_masm, JVM_REF_invokeSpecial, member_reg, temp3);
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}
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__ load_heap_oop(rbx_method, member_vmtarget);
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__ movptr(rbx_method, vmtarget_method);
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break;
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case vmIntrinsics::_linkToStatic:
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if (VerifyMethodHandles) {
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verify_ref_kind(_masm, JVM_REF_invokeStatic, member_reg, temp3);
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}
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__ load_heap_oop(rbx_method, member_vmtarget);
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__ movptr(rbx_method, vmtarget_method);
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break;
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case vmIntrinsics::_linkToVirtual:
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{
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// same as TemplateTable::invokevirtual,
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// minus the CP setup and profiling:
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if (VerifyMethodHandles) {
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verify_ref_kind(_masm, JVM_REF_invokeVirtual, member_reg, temp3);
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}
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// pick out the vtable index from the MemberName, and then we can discard it:
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Register temp2_index = temp2;
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__ movptr(temp2_index, member_vmindex);
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if (VerifyMethodHandles) {
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Label L_index_ok;
|
|
__ cmpl(temp2_index, 0);
|
|
__ jcc(Assembler::greaterEqual, L_index_ok);
|
|
__ STOP("no virtual index");
|
|
__ BIND(L_index_ok);
|
|
}
|
|
|
|
// Note: The verifier invariants allow us to ignore MemberName.clazz and vmtarget
|
|
// at this point. And VerifyMethodHandles has already checked clazz, if needed.
|
|
|
|
// get target Method* & entry point
|
|
__ lookup_virtual_method(temp1_recv_klass, temp2_index, rbx_method);
|
|
break;
|
|
}
|
|
|
|
case vmIntrinsics::_linkToInterface:
|
|
{
|
|
// same as TemplateTable::invokeinterface
|
|
// (minus the CP setup and profiling, with different argument motion)
|
|
if (VerifyMethodHandles) {
|
|
verify_ref_kind(_masm, JVM_REF_invokeInterface, member_reg, temp3);
|
|
}
|
|
|
|
Register temp3_intf = temp3;
|
|
__ load_heap_oop(temp3_intf, member_clazz);
|
|
load_klass_from_Class(_masm, temp3_intf);
|
|
__ verify_klass_ptr(temp3_intf);
|
|
|
|
Register rbx_index = rbx_method;
|
|
__ movptr(rbx_index, member_vmindex);
|
|
if (VerifyMethodHandles) {
|
|
Label L;
|
|
__ cmpl(rbx_index, 0);
|
|
__ jcc(Assembler::greaterEqual, L);
|
|
__ STOP("invalid vtable index for MH.invokeInterface");
|
|
__ bind(L);
|
|
}
|
|
|
|
// given intf, index, and recv klass, dispatch to the implementation method
|
|
__ lookup_interface_method(temp1_recv_klass, temp3_intf,
|
|
// note: next two args must be the same:
|
|
rbx_index, rbx_method,
|
|
temp2,
|
|
L_incompatible_class_change_error);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
fatal("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid));
|
|
break;
|
|
}
|
|
|
|
// Live at this point:
|
|
// rbx_method
|
|
// rsi/r13 (if interpreted)
|
|
|
|
// After figuring out which concrete method to call, jump into it.
|
|
// Note that this works in the interpreter with no data motion.
|
|
// But the compiled version will require that rcx_recv be shifted out.
|
|
__ verify_method_ptr(rbx_method);
|
|
jump_from_method_handle(_masm, rbx_method, temp1, for_compiler_entry);
|
|
|
|
if (iid == vmIntrinsics::_linkToInterface) {
|
|
__ bind(L_incompatible_class_change_error);
|
|
__ jump(RuntimeAddress(StubRoutines::throw_IncompatibleClassChangeError_entry()));
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifndef PRODUCT
|
|
void trace_method_handle_stub(const char* adaptername,
|
|
oop mh,
|
|
intptr_t* saved_regs,
|
|
intptr_t* entry_sp) {
|
|
// called as a leaf from native code: do not block the JVM!
|
|
bool has_mh = (strstr(adaptername, "/static") == NULL &&
|
|
strstr(adaptername, "linkTo") == NULL); // static linkers don't have MH
|
|
const char* mh_reg_name = has_mh ? "rcx_mh" : "rcx";
|
|
tty->print_cr("MH %s %s=" PTR_FORMAT " sp=" PTR_FORMAT,
|
|
adaptername, mh_reg_name,
|
|
p2i(mh), p2i(entry_sp));
|
|
|
|
if (Verbose) {
|
|
tty->print_cr("Registers:");
|
|
const int saved_regs_count = RegisterImpl::number_of_registers;
|
|
for (int i = 0; i < saved_regs_count; i++) {
|
|
Register r = as_Register(i);
|
|
// The registers are stored in reverse order on the stack (by pusha).
|
|
tty->print("%3s=" PTR_FORMAT, r->name(), saved_regs[((saved_regs_count - 1) - i)]);
|
|
if ((i + 1) % 4 == 0) {
|
|
tty->cr();
|
|
} else {
|
|
tty->print(", ");
|
|
}
|
|
}
|
|
tty->cr();
|
|
|
|
{
|
|
// dumping last frame with frame::describe
|
|
|
|
JavaThread* p = JavaThread::active();
|
|
|
|
ResourceMark rm;
|
|
PRESERVE_EXCEPTION_MARK; // may not be needed by safer and unexpensive here
|
|
FrameValues values;
|
|
|
|
// Note: We want to allow trace_method_handle from any call site.
|
|
// While trace_method_handle creates a frame, it may be entered
|
|
// without a PC on the stack top (e.g. not just after a call).
|
|
// Walking that frame could lead to failures due to that invalid PC.
|
|
// => carefully detect that frame when doing the stack walking
|
|
|
|
// Current C frame
|
|
frame cur_frame = os::current_frame();
|
|
|
|
// Robust search of trace_calling_frame (independant of inlining).
|
|
// Assumes saved_regs comes from a pusha in the trace_calling_frame.
|
|
assert(cur_frame.sp() < saved_regs, "registers not saved on stack ?");
|
|
frame trace_calling_frame = os::get_sender_for_C_frame(&cur_frame);
|
|
while (trace_calling_frame.fp() < saved_regs) {
|
|
trace_calling_frame = os::get_sender_for_C_frame(&trace_calling_frame);
|
|
}
|
|
|
|
// safely create a frame and call frame::describe
|
|
intptr_t *dump_sp = trace_calling_frame.sender_sp();
|
|
intptr_t *dump_fp = trace_calling_frame.link();
|
|
|
|
bool walkable = has_mh; // whether the traced frame shoud be walkable
|
|
|
|
if (walkable) {
|
|
// The previous definition of walkable may have to be refined
|
|
// if new call sites cause the next frame constructor to start
|
|
// failing. Alternatively, frame constructors could be
|
|
// modified to support the current or future non walkable
|
|
// frames (but this is more intrusive and is not considered as
|
|
// part of this RFE, which will instead use a simpler output).
|
|
frame dump_frame = frame(dump_sp, dump_fp);
|
|
dump_frame.describe(values, 1);
|
|
} else {
|
|
// Stack may not be walkable (invalid PC above FP):
|
|
// Add descriptions without building a Java frame to avoid issues
|
|
values.describe(-1, dump_fp, "fp for #1 <not parsed, cannot trust pc>");
|
|
values.describe(-1, dump_sp, "sp for #1");
|
|
}
|
|
values.describe(-1, entry_sp, "raw top of stack");
|
|
|
|
tty->print_cr("Stack layout:");
|
|
values.print(p);
|
|
}
|
|
if (has_mh && oopDesc::is_oop(mh)) {
|
|
mh->print();
|
|
if (java_lang_invoke_MethodHandle::is_instance(mh)) {
|
|
if (java_lang_invoke_MethodHandle::form_offset_in_bytes() != 0)
|
|
java_lang_invoke_MethodHandle::form(mh)->print();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// The stub wraps the arguments in a struct on the stack to avoid
|
|
// dealing with the different calling conventions for passing 6
|
|
// arguments.
|
|
struct MethodHandleStubArguments {
|
|
const char* adaptername;
|
|
oopDesc* mh;
|
|
intptr_t* saved_regs;
|
|
intptr_t* entry_sp;
|
|
};
|
|
void trace_method_handle_stub_wrapper(MethodHandleStubArguments* args) {
|
|
trace_method_handle_stub(args->adaptername,
|
|
args->mh,
|
|
args->saved_regs,
|
|
args->entry_sp);
|
|
}
|
|
|
|
void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) {
|
|
if (!TraceMethodHandles) return;
|
|
BLOCK_COMMENT("trace_method_handle {");
|
|
__ enter();
|
|
__ andptr(rsp, -16); // align stack if needed for FPU state
|
|
__ pusha();
|
|
__ mov(rbx, rsp); // for retreiving saved_regs
|
|
// Note: saved_regs must be in the entered frame for the
|
|
// robust stack walking implemented in trace_method_handle_stub.
|
|
|
|
// save FP result, valid at some call sites (adapter_opt_return_float, ...)
|
|
__ increment(rsp, -2 * wordSize);
|
|
if (UseSSE >= 2) {
|
|
__ movdbl(Address(rsp, 0), xmm0);
|
|
} else if (UseSSE == 1) {
|
|
__ movflt(Address(rsp, 0), xmm0);
|
|
} else {
|
|
__ fst_d(Address(rsp, 0));
|
|
}
|
|
|
|
// Incoming state:
|
|
// rcx: method handle
|
|
//
|
|
// To avoid calling convention issues, build a record on the stack
|
|
// and pass the pointer to that instead.
|
|
__ push(rbp); // entry_sp (with extra align space)
|
|
__ push(rbx); // pusha saved_regs
|
|
__ push(rcx); // mh
|
|
__ push(rcx); // slot for adaptername
|
|
__ movptr(Address(rsp, 0), (intptr_t) adaptername);
|
|
__ super_call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub_wrapper), rsp);
|
|
__ increment(rsp, sizeof(MethodHandleStubArguments));
|
|
|
|
if (UseSSE >= 2) {
|
|
__ movdbl(xmm0, Address(rsp, 0));
|
|
} else if (UseSSE == 1) {
|
|
__ movflt(xmm0, Address(rsp, 0));
|
|
} else {
|
|
__ fld_d(Address(rsp, 0));
|
|
}
|
|
__ increment(rsp, 2 * wordSize);
|
|
|
|
__ popa();
|
|
__ leave();
|
|
BLOCK_COMMENT("} trace_method_handle");
|
|
}
|
|
#endif //PRODUCT
|