aoqi@1: /* aoqi@1: * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. aoqi@1: * Copyright (c) 2015, 2016, Loongson Technology. All rights reserved. aoqi@1: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. aoqi@1: * aoqi@1: * This code is free software; you can redistribute it and/or modify it aoqi@1: * under the terms of the GNU General Public License version 2 only, as aoqi@1: * published by the Free Software Foundation. aoqi@1: * aoqi@1: * This code is distributed in the hope that it will be useful, but WITHOUT aoqi@1: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or aoqi@1: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License aoqi@1: * version 2 for more details (a copy is included in the LICENSE file that aoqi@1: * accompanied this code). aoqi@1: * aoqi@1: * You should have received a copy of the GNU General Public License version aoqi@1: * 2 along with this work; if not, write to the Free Software Foundation, aoqi@1: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. aoqi@1: * aoqi@1: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA aoqi@1: * or visit www.oracle.com if you need additional information or have any aoqi@1: * questions. aoqi@1: * aoqi@1: */ aoqi@1: aoqi@1: #include "precompiled.hpp" aoqi@1: #include "asm/macroAssembler.hpp" aoqi@1: #include "interpreter/interpreter.hpp" aoqi@1: #include "interpreter/interpreterRuntime.hpp" aoqi@1: #include "memory/allocation.inline.hpp" aoqi@1: #include "prims/methodHandles.hpp" aoqi@1: aoqi@1: #define __ _masm-> aoqi@1: aoqi@1: #ifdef PRODUCT aoqi@1: #define BLOCK_COMMENT(str) /* nothing */ aoqi@1: #define STOP(error) stop(error) aoqi@1: #else aoqi@1: #define BLOCK_COMMENT(str) __ block_comment(str) aoqi@1: #define STOP(error) block_comment(error); __ stop(error) aoqi@1: #endif aoqi@1: aoqi@1: #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") aoqi@1: aoqi@1: void MethodHandles::load_klass_from_Class(MacroAssembler* _masm, Register klass_reg) { aoqi@1: if (VerifyMethodHandles) aoqi@1: verify_klass(_masm, klass_reg, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_Class), aoqi@1: "MH argument is a Class"); aoqi@1: __ ld(klass_reg, Address(klass_reg, java_lang_Class::klass_offset_in_bytes())); aoqi@1: } aoqi@1: aoqi@1: #ifdef ASSERT aoqi@1: static int check_nonzero(const char* xname, int x) { aoqi@1: assert(x != 0, err_msg("%s should be nonzero", xname)); aoqi@1: return x; aoqi@1: } aoqi@1: #define NONZERO(x) check_nonzero(#x, x) aoqi@1: #else //ASSERT aoqi@1: #define NONZERO(x) (x) aoqi@1: #endif //ASSERT aoqi@1: aoqi@1: #ifdef ASSERT aoqi@1: void MethodHandles::verify_klass(MacroAssembler* _masm, aoqi@1: Register obj, SystemDictionary::WKID klass_id, aoqi@1: const char* error_message) { aoqi@1: /* aoqi@1: Klass** klass_addr = SystemDictionary::well_known_klass_addr(klass_id); aoqi@1: KlassHandle klass = SystemDictionary::well_known_klass(klass_id); aoqi@1: Register temp = S0; aoqi@1: // Register temp2 = noreg; aoqi@1: // LP64_ONLY(temp2 = S1); // used by MacroAssembler::cmpptr aoqi@1: Label L_ok, L_bad; aoqi@1: BLOCK_COMMENT("verify_klass {"); aoqi@1: __ verify_oop(obj); aoqi@1: // __ testptr(obj, obj); aoqi@1: // __ jcc(Assembler::zero, L_bad); aoqi@1: __ beq(obj, R0, L_bad); aoqi@1: __ nop(); aoqi@1: __ push(temp); //if (temp2 != noreg) __ push(temp2); aoqi@1: #define UNPUSH { __ pop(temp); } aoqi@1: __ load_klass(temp, obj); aoqi@1: // __ cmpptr(temp, ExternalAddress((address) klass_addr)); aoqi@1: // __ jcc(Assembler::equal, L_ok); aoqi@1: __ li(AT, (long)&klass_addr); aoqi@1: __ ld(AT, AT, 0); aoqi@1: __ beq(temp, AT, L_ok); aoqi@1: __ nop(); aoqi@1: intptr_t super_check_offset = klass->super_check_offset(); aoqi@1: __ ld(temp, Address(temp, super_check_offset)); aoqi@1: // __ cmpptr(temp, ExternalAddress((address) klass_addr)); aoqi@1: // __ jcc(Assembler::equal, L_ok); aoqi@1: __ li(AT, (long)&klass_addr); aoqi@1: __ ld(AT, AT, 0); aoqi@1: __ beq(AT, temp, L_ok); aoqi@1: __ nop(); aoqi@1: UNPUSH; aoqi@1: __ bind(L_bad); aoqi@1: __ STOP(error_message); aoqi@1: __ BIND(L_ok); aoqi@1: UNPUSH; aoqi@1: BLOCK_COMMENT("} verify_klass"); aoqi@1: */ aoqi@1: } aoqi@1: aoqi@1: void MethodHandles::verify_ref_kind(MacroAssembler* _masm, int ref_kind, Register member_reg, Register temp) { aoqi@1: Label L; aoqi@1: BLOCK_COMMENT("verify_ref_kind {"); aoqi@1: __ lw(temp, Address(member_reg, NONZERO(java_lang_invoke_MemberName::flags_offset_in_bytes()))); aoqi@1: // __ shrl(temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT); aoqi@1: __ sra(temp, temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT); aoqi@1: // __ andl(temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK); aoqi@1: __ move(AT, java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK); aoqi@1: __ andr(temp, temp, AT); aoqi@1: // __ cmpl(temp, ref_kind); aoqi@1: // __ jcc(Assembler::equal, L); aoqi@1: __ move(AT, ref_kind); aoqi@1: __ beq(temp, AT, L); aoqi@1: __ nop(); aoqi@1: { char* buf = NEW_C_HEAP_ARRAY(char, 100, mtInternal); aoqi@1: jio_snprintf(buf, 100, "verify_ref_kind expected %x", ref_kind); aoqi@1: if (ref_kind == JVM_REF_invokeVirtual || aoqi@1: ref_kind == JVM_REF_invokeSpecial) aoqi@1: // could do this for all ref_kinds, but would explode assembly code size aoqi@1: trace_method_handle(_masm, buf); aoqi@1: __ STOP(buf); aoqi@1: } aoqi@1: BLOCK_COMMENT("} verify_ref_kind"); aoqi@1: __ bind(L); aoqi@1: } aoqi@1: aoqi@1: #endif //ASSERT aoqi@1: aoqi@1: void MethodHandles::jump_from_method_handle(MacroAssembler* _masm, Register method, Register temp, aoqi@1: bool for_compiler_entry) { aoqi@1: assert(method == Rmethod, "interpreter calling convention"); aoqi@1: aoqi@1: Label L_no_such_method; aoqi@1: __ beq(method, R0, L_no_such_method); aoqi@1: __ nop(); aoqi@1: aoqi@1: __ verify_method_ptr(method); aoqi@1: aoqi@1: if (!for_compiler_entry && JvmtiExport::can_post_interpreter_events()) { aoqi@1: Label run_compiled_code; aoqi@1: // JVMTI events, such as single-stepping, are implemented partly by avoiding running aoqi@1: // compiled code in threads for which the event is enabled. Check here for aoqi@1: // interp_only_mode if these events CAN be enabled. aoqi@1: #ifdef _LP64 aoqi@1: Register rthread = TREG; aoqi@1: #else aoqi@1: Register rthread = temp; aoqi@1: __ get_thread(rthread); aoqi@1: #endif aoqi@1: // interp_only is an int, on little endian it is sufficient to test the byte only aoqi@1: // Is a cmpl faster? aoqi@1: // __ cmpb(Address(rthread, JavaThread::interp_only_mode_offset()), 0); aoqi@1: __ lbu(AT, rthread, in_bytes(JavaThread::interp_only_mode_offset())); aoqi@1: // __ jccb(Assembler::zero, run_compiled_code); aoqi@1: __ beq(AT, R0, run_compiled_code); aoqi@1: __ nop(); aoqi@1: // __ jmp(Address(method, Method::interpreter_entry_offset())); aoqi@1: __ ld(T9, method, in_bytes(Method::interpreter_entry_offset())); aoqi@1: __ jr(T9); aoqi@1: __ nop(); aoqi@1: __ BIND(run_compiled_code); aoqi@1: } aoqi@1: aoqi@1: const ByteSize entry_offset = for_compiler_entry ? Method::from_compiled_offset() : aoqi@1: Method::from_interpreted_offset(); aoqi@1: // __ jmp(Address(method, entry_offset)); aoqi@1: __ ld(T9, method, in_bytes(entry_offset)); aoqi@1: __ jr(T9); aoqi@1: __ nop(); aoqi@1: aoqi@1: __ bind(L_no_such_method); aoqi@1: // __ jump(RuntimeAddress(StubRoutines::throw_AbstractMethodError_entry())); aoqi@1: address wrong_method = StubRoutines::throw_AbstractMethodError_entry(); aoqi@1: __ jmp(wrong_method, relocInfo::runtime_call_type); aoqi@1: __ nop(); aoqi@1: } aoqi@1: aoqi@1: void MethodHandles::jump_to_lambda_form(MacroAssembler* _masm, aoqi@1: Register recv, Register method_temp, aoqi@1: Register temp2, aoqi@1: bool for_compiler_entry) { aoqi@1: BLOCK_COMMENT("jump_to_lambda_form {"); aoqi@1: // This is the initial entry point of a lazy method handle. aoqi@1: // After type checking, it picks up the invoker from the LambdaForm. aoqi@1: assert_different_registers(recv, method_temp, temp2); aoqi@1: assert(recv != noreg, "required register"); aoqi@1: assert(method_temp == Rmethod, "required register for loading method"); aoqi@1: aoqi@1: //NOT_PRODUCT({ FlagSetting fs(TraceMethodHandles, true); trace_method_handle(_masm, "LZMH"); }); aoqi@1: aoqi@1: // Load the invoker, as MH -> MH.form -> LF.vmentry aoqi@1: __ verify_oop(recv); aoqi@1: __ load_heap_oop(method_temp, Address(recv, NONZERO(java_lang_invoke_MethodHandle::form_offset_in_bytes()))); aoqi@1: __ verify_oop(method_temp); aoqi@1: __ load_heap_oop(method_temp, Address(method_temp, NONZERO(java_lang_invoke_LambdaForm::vmentry_offset_in_bytes()))); aoqi@1: __ verify_oop(method_temp); aoqi@1: // the following assumes that a Method* is normally compressed in the vmtarget field: aoqi@1: // __ movptr(method_temp, Address(method_temp, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes()))); aoqi@1: __ ld(method_temp, Address(method_temp, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes()))); aoqi@1: aoqi@1: if (VerifyMethodHandles && !for_compiler_entry) { aoqi@1: // make sure recv is already on stack aoqi@1: // __ movptr(temp2, Address(method_temp, Method::const_offset())); aoqi@1: __ ld(temp2, Address(method_temp, Method::const_offset())); aoqi@1: __ load_sized_value(temp2, aoqi@1: Address(temp2, ConstMethod::size_of_parameters_offset()), aoqi@1: sizeof(u2), false); aoqi@1: // assert(sizeof(u2) == sizeof(Method::_size_of_parameters), ""); aoqi@1: Label L; aoqi@1: // __ cmpptr(recv, __ argument_address(temp2, -1)); aoqi@1: // __ jcc(Assembler::equal, L); aoqi@1: Address recv_addr = __ argument_address(temp2, -1); aoqi@1: __ ld(AT, recv_addr); aoqi@1: __ beq(recv, AT, L); aoqi@1: __ nop(); aoqi@1: aoqi@1: // __ movptr(rax, __ argument_address(temp2, -1)); aoqi@1: recv_addr = __ argument_address(temp2, -1); aoqi@1: __ ld(V0, recv_addr); aoqi@1: __ STOP("receiver not on stack"); aoqi@1: __ BIND(L); aoqi@1: } aoqi@1: aoqi@1: jump_from_method_handle(_masm, method_temp, temp2, for_compiler_entry); aoqi@1: BLOCK_COMMENT("} jump_to_lambda_form"); aoqi@1: } aoqi@1: aoqi@1: aoqi@1: // Code generation aoqi@1: address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm, aoqi@1: vmIntrinsics::ID iid) { aoqi@1: const bool not_for_compiler_entry = false; // this is the interpreter entry aoqi@1: assert(is_signature_polymorphic(iid), "expected invoke iid"); aoqi@1: if (iid == vmIntrinsics::_invokeGeneric || aoqi@1: iid == vmIntrinsics::_compiledLambdaForm) { aoqi@1: // Perhaps surprisingly, the symbolic references visible to Java are not directly used. aoqi@1: // They are linked to Java-generated adapters via MethodHandleNatives.linkMethod. aoqi@1: // They all allow an appendix argument. aoqi@1: // __ hlt(); // empty stubs make SG sick aoqi@1: __ stop("empty stubs make SG sick"); aoqi@1: return NULL; aoqi@1: } aoqi@1: aoqi@1: // rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted) aoqi@1: // rbx: Method* aoqi@1: // rdx: argument locator (parameter slot count, added to rsp) aoqi@1: // rcx: used as temp to hold mh or receiver aoqi@1: // rax, rdi: garbage temps, blown away aoqi@1: Register rdx_argp = T9; // argument list ptr, live on error paths aoqi@1: // Register rax_temp = rax; aoqi@1: Register rcx_mh = S7; // MH receiver; dies quickly and is recycled aoqi@1: Register rbx_method = Rmethod; // eventual target of this invocation aoqi@1: aoqi@1: // here's where control starts out: aoqi@1: __ align(CodeEntryAlignment); aoqi@1: address entry_point = __ pc(); aoqi@1: aoqi@1: if (VerifyMethodHandles) { aoqi@1: Label L; aoqi@1: BLOCK_COMMENT("verify_intrinsic_id {"); aoqi@1: // __ cmpb(Address(rbx_method, Method::intrinsic_id_offset_in_bytes()), (int) iid); aoqi@1: // __ jcc(Assembler::equal, L); aoqi@1: __ lbu(AT, rbx_method, Method::intrinsic_id_offset_in_bytes()); aoqi@1: guarantee(Assembler::is_simm16(iid), "Oops, iid is not simm16! Change the instructions."); aoqi@1: __ addiu(AT, AT, -1 * (int) iid); aoqi@1: __ beq(AT, R0, L); aoqi@1: __ nop(); aoqi@1: if (iid == vmIntrinsics::_linkToVirtual || aoqi@1: iid == vmIntrinsics::_linkToSpecial) { aoqi@1: // could do this for all kinds, but would explode assembly code size aoqi@1: trace_method_handle(_masm, "bad Method*::intrinsic_id"); aoqi@1: } aoqi@1: __ STOP("bad Method*::intrinsic_id"); aoqi@1: __ bind(L); aoqi@1: BLOCK_COMMENT("} verify_intrinsic_id"); aoqi@1: } aoqi@1: aoqi@1: // First task: Find out how big the argument list is. aoqi@1: Address rdx_first_arg_addr; aoqi@1: int ref_kind = signature_polymorphic_intrinsic_ref_kind(iid); aoqi@1: assert(ref_kind != 0 || iid == vmIntrinsics::_invokeBasic, "must be _invokeBasic or a linkTo intrinsic"); aoqi@1: if (ref_kind == 0 || MethodHandles::ref_kind_has_receiver(ref_kind)) { aoqi@1: __ ld(rdx_argp, Address(rbx_method, Method::const_offset())); aoqi@1: __ load_sized_value(rdx_argp, aoqi@1: Address(rdx_argp, ConstMethod::size_of_parameters_offset()), aoqi@1: sizeof(u2), false); aoqi@1: // assert(sizeof(u2) == sizeof(Method::_size_of_parameters), ""); aoqi@1: rdx_first_arg_addr = __ argument_address(rdx_argp, -1); aoqi@1: } else { aoqi@1: DEBUG_ONLY(rdx_argp = noreg); aoqi@1: } aoqi@1: aoqi@1: if (!is_signature_polymorphic_static(iid)) { aoqi@1: __ ld(rcx_mh, rdx_first_arg_addr); aoqi@1: DEBUG_ONLY(rdx_argp = noreg); aoqi@1: } aoqi@1: aoqi@1: // rdx_first_arg_addr is live! aoqi@1: aoqi@1: trace_method_handle_interpreter_entry(_masm, iid); aoqi@1: aoqi@1: if (iid == vmIntrinsics::_invokeBasic) { aoqi@1: generate_method_handle_dispatch(_masm, iid, rcx_mh, noreg, not_for_compiler_entry); aoqi@1: aoqi@1: } else { aoqi@1: // Adjust argument list by popping the trailing MemberName argument. aoqi@1: Register rcx_recv = noreg; aoqi@1: if (MethodHandles::ref_kind_has_receiver(ref_kind)) { aoqi@1: // Load the receiver (not the MH; the actual MemberName's receiver) up from the interpreter stack. aoqi@1: __ ld(rcx_recv = T2, rdx_first_arg_addr); aoqi@1: } aoqi@1: DEBUG_ONLY(rdx_argp = noreg); aoqi@1: Register rbx_member = rbx_method; // MemberName ptr; incoming method ptr is dead now aoqi@1: // __ pop(AT); // return address aoqi@1: __ pop(rbx_member); // extract last argument aoqi@1: // __ push(AT); // re-push return address aoqi@1: generate_method_handle_dispatch(_masm, iid, rcx_recv, rbx_member, not_for_compiler_entry); aoqi@1: } aoqi@1: aoqi@1: return entry_point; aoqi@1: } aoqi@1: aoqi@1: void MethodHandles::generate_method_handle_dispatch(MacroAssembler* _masm, aoqi@1: vmIntrinsics::ID iid, aoqi@1: Register receiver_reg, aoqi@1: Register member_reg, aoqi@1: bool for_compiler_entry) { aoqi@1: assert(is_signature_polymorphic(iid), "expected invoke iid"); aoqi@1: Register rbx_method = Rmethod; // eventual target of this invocation aoqi@1: // temps used in this code are not used in *either* compiled or interpreted calling sequences aoqi@1: #ifdef _LP64 aoqi@1: Register j_rarg0 = T0; aoqi@1: Register j_rarg1 = A0; aoqi@1: Register j_rarg2 = A1; aoqi@1: Register j_rarg3 = A2; aoqi@1: Register j_rarg4 = A3; aoqi@1: Register j_rarg5 = A4; aoqi@1: aoqi@1: Register temp1 = T8; aoqi@1: Register temp2 = T9; aoqi@1: Register temp3 = V0; aoqi@1: if (for_compiler_entry) { aoqi@1: assert(receiver_reg == (iid == vmIntrinsics::_linkToStatic ? noreg : j_rarg0), "only valid assignment"); aoqi@1: assert_different_registers(temp1, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5); aoqi@1: assert_different_registers(temp2, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5); aoqi@1: assert_different_registers(temp3, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5); aoqi@1: } aoqi@1: #else aoqi@1: /* aoqi@1: Register temp1 = (for_compiler_entry ? rsi : rdx); aoqi@1: Register temp2 = rdi; aoqi@1: Register temp3 = rax; aoqi@1: if (for_compiler_entry) { aoqi@1: assert(receiver_reg == (iid == vmIntrinsics::_linkToStatic ? noreg : rcx), "only valid assignment"); aoqi@1: assert_different_registers(temp1, rcx, rdx); aoqi@1: assert_different_registers(temp2, rcx, rdx); aoqi@1: assert_different_registers(temp3, rcx, rdx); aoqi@1: } aoqi@1: */ aoqi@1: #endif aoqi@1: else { aoqi@1: assert_different_registers(temp1, temp2, temp3, saved_last_sp_register()); // don't trash lastSP aoqi@1: } aoqi@1: assert_different_registers(temp1, temp2, temp3, receiver_reg); aoqi@1: assert_different_registers(temp1, temp2, temp3, member_reg); aoqi@1: aoqi@1: if (iid == vmIntrinsics::_invokeBasic) { aoqi@1: // indirect through MH.form.vmentry.vmtarget aoqi@1: jump_to_lambda_form(_masm, receiver_reg, rbx_method, temp1, for_compiler_entry); aoqi@1: aoqi@1: } else { aoqi@1: // The method is a member invoker used by direct method handles. aoqi@1: if (VerifyMethodHandles) { aoqi@1: // make sure the trailing argument really is a MemberName (caller responsibility) aoqi@1: verify_klass(_masm, member_reg, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_invoke_MemberName), aoqi@1: "MemberName required for invokeVirtual etc."); aoqi@1: } aoqi@1: aoqi@1: Address member_clazz( member_reg, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes())); aoqi@1: Address member_vmindex( member_reg, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes())); aoqi@1: Address member_vmtarget( member_reg, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes())); aoqi@1: aoqi@1: Register temp1_recv_klass = temp1; aoqi@1: if (iid != vmIntrinsics::_linkToStatic) { aoqi@1: __ verify_oop(receiver_reg); aoqi@1: if (iid == vmIntrinsics::_linkToSpecial) { aoqi@1: // Don't actually load the klass; just null-check the receiver. aoqi@1: __ null_check(receiver_reg); aoqi@1: } else { aoqi@1: // load receiver klass itself aoqi@1: __ null_check(receiver_reg, oopDesc::klass_offset_in_bytes()); aoqi@1: __ load_klass(temp1_recv_klass, receiver_reg); aoqi@1: __ verify_klass_ptr(temp1_recv_klass); aoqi@1: } aoqi@1: BLOCK_COMMENT("check_receiver {"); aoqi@1: // The receiver for the MemberName must be in receiver_reg. aoqi@1: // Check the receiver against the MemberName.clazz aoqi@1: if (VerifyMethodHandles && iid == vmIntrinsics::_linkToSpecial) { aoqi@1: // Did not load it above... aoqi@1: __ load_klass(temp1_recv_klass, receiver_reg); aoqi@1: __ verify_klass_ptr(temp1_recv_klass); aoqi@1: } aoqi@1: if (VerifyMethodHandles && iid != vmIntrinsics::_linkToInterface) { aoqi@1: Label L_ok; aoqi@1: Register temp2_defc = temp2; aoqi@1: __ load_heap_oop(temp2_defc, member_clazz); aoqi@1: load_klass_from_Class(_masm, temp2_defc); aoqi@1: __ verify_klass_ptr(temp2_defc); aoqi@1: __ check_klass_subtype(temp1_recv_klass, temp2_defc, temp3, L_ok); aoqi@1: // If we get here, the type check failed! aoqi@1: __ STOP("receiver class disagrees with MemberName.clazz"); aoqi@1: __ bind(L_ok); aoqi@1: } aoqi@1: BLOCK_COMMENT("} check_receiver"); aoqi@1: } aoqi@1: if (iid == vmIntrinsics::_linkToSpecial || aoqi@1: iid == vmIntrinsics::_linkToStatic) { aoqi@1: DEBUG_ONLY(temp1_recv_klass = noreg); // these guys didn't load the recv_klass aoqi@1: } aoqi@1: aoqi@1: // Live registers at this point: aoqi@1: // member_reg - MemberName that was the trailing argument aoqi@1: // temp1_recv_klass - klass of stacked receiver, if needed aoqi@1: // rsi/r13 - interpreter linkage (if interpreted) aoqi@1: // rcx, rdx, rsi, rdi, r8, r8 - compiler arguments (if compiled) aoqi@1: aoqi@1: Label L_incompatible_class_change_error; aoqi@1: switch (iid) { aoqi@1: case vmIntrinsics::_linkToSpecial: aoqi@1: if (VerifyMethodHandles) { aoqi@1: verify_ref_kind(_masm, JVM_REF_invokeSpecial, member_reg, temp3); aoqi@1: } aoqi@1: __ ld(rbx_method, member_vmtarget); aoqi@1: break; aoqi@1: aoqi@1: case vmIntrinsics::_linkToStatic: aoqi@1: if (VerifyMethodHandles) { aoqi@1: verify_ref_kind(_masm, JVM_REF_invokeStatic, member_reg, temp3); aoqi@1: } aoqi@1: __ ld(rbx_method, member_vmtarget); aoqi@1: break; aoqi@1: aoqi@1: case vmIntrinsics::_linkToVirtual: aoqi@1: { aoqi@1: // same as TemplateTable::invokevirtual, aoqi@1: // minus the CP setup and profiling: aoqi@1: aoqi@1: if (VerifyMethodHandles) { aoqi@1: verify_ref_kind(_masm, JVM_REF_invokeVirtual, member_reg, temp3); aoqi@1: } aoqi@1: aoqi@1: // pick out the vtable index from the MemberName, and then we can discard it: aoqi@1: Register temp2_index = temp2; aoqi@1: __ ld(temp2_index, member_vmindex); aoqi@1: aoqi@1: if (VerifyMethodHandles) { aoqi@1: Label L_index_ok; aoqi@1: // __ cmpl(temp2_index, 0); aoqi@1: // __ jcc(Assembler::greaterEqual, L_index_ok); aoqi@1: aoqi@1: __ slt(AT, R0, temp2_index); aoqi@1: __ bne(AT, R0, L_index_ok); aoqi@1: __ nop(); aoqi@1: __ STOP("no virtual index"); aoqi@1: __ BIND(L_index_ok); aoqi@1: } aoqi@1: aoqi@1: // Note: The verifier invariants allow us to ignore MemberName.clazz and vmtarget aoqi@1: // at this point. And VerifyMethodHandles has already checked clazz, if needed. aoqi@1: aoqi@1: // get target Method* & entry point aoqi@1: __ lookup_virtual_method(temp1_recv_klass, temp2_index, rbx_method); aoqi@1: break; aoqi@1: } aoqi@1: aoqi@1: case vmIntrinsics::_linkToInterface: aoqi@1: { aoqi@1: // same as TemplateTable::invokeinterface aoqi@1: // (minus the CP setup and profiling, with different argument motion) aoqi@1: if (VerifyMethodHandles) { aoqi@1: verify_ref_kind(_masm, JVM_REF_invokeInterface, member_reg, temp3); aoqi@1: } aoqi@1: aoqi@1: Register temp3_intf = temp3; aoqi@1: __ load_heap_oop(temp3_intf, member_clazz); aoqi@1: load_klass_from_Class(_masm, temp3_intf); aoqi@1: __ verify_klass_ptr(temp3_intf); aoqi@1: aoqi@1: Register rbx_index = rbx_method; aoqi@1: __ ld(rbx_index, member_vmindex); aoqi@1: if (VerifyMethodHandles) { aoqi@1: Label L; aoqi@1: // __ cmpl(rbx_index, 0); aoqi@1: // __ jcc(Assembler::greaterEqual, L); aoqi@1: __ slt(AT, R0, rbx_index); aoqi@1: __ bne(AT, R0, L); aoqi@1: __ nop(); aoqi@1: __ STOP("invalid vtable index for MH.invokeInterface"); aoqi@1: __ bind(L); aoqi@1: } aoqi@1: aoqi@1: // given intf, index, and recv klass, dispatch to the implementation method aoqi@1: __ lookup_interface_method(temp1_recv_klass, temp3_intf, aoqi@1: // note: next two args must be the same: aoqi@1: rbx_index, rbx_method, aoqi@1: temp2, aoqi@1: L_incompatible_class_change_error); aoqi@1: break; aoqi@1: } aoqi@1: aoqi@1: default: aoqi@1: fatal(err_msg_res("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid))); aoqi@1: break; aoqi@1: } aoqi@1: aoqi@1: // Live at this point: aoqi@1: // rbx_method aoqi@1: // rsi/r13 (if interpreted) aoqi@1: aoqi@1: // After figuring out which concrete method to call, jump into it. aoqi@1: // Note that this works in the interpreter with no data motion. aoqi@1: // But the compiled version will require that rcx_recv be shifted out. aoqi@1: __ verify_method_ptr(rbx_method); aoqi@1: jump_from_method_handle(_masm, rbx_method, temp1, for_compiler_entry); aoqi@1: aoqi@1: if (iid == vmIntrinsics::_linkToInterface) { aoqi@1: __ bind(L_incompatible_class_change_error); aoqi@1: // __ jump(RuntimeAddress(StubRoutines::throw_IncompatibleClassChangeError_entry())); aoqi@1: address icce_entry= StubRoutines::throw_IncompatibleClassChangeError_entry(); aoqi@1: __ jmp(icce_entry, relocInfo::runtime_call_type); aoqi@1: __ nop(); aoqi@1: } aoqi@1: } aoqi@1: } aoqi@1: aoqi@1: #ifndef PRODUCT aoqi@1: void trace_method_handle_stub(const char* adaptername, aoqi@1: oop mh, aoqi@1: intptr_t* saved_regs, aoqi@1: intptr_t* entry_sp) { aoqi@1: // called as a leaf from native code: do not block the JVM! aoqi@1: bool has_mh = (strstr(adaptername, "/static") == NULL && aoqi@1: strstr(adaptername, "linkTo") == NULL); // static linkers don't have MH aoqi@1: const char* mh_reg_name = has_mh ? "rcx_mh" : "rcx"; aoqi@1: tty->print_cr("MH %s %s="PTR_FORMAT" sp="PTR_FORMAT, aoqi@1: adaptername, mh_reg_name, aoqi@1: (void *)mh, entry_sp); aoqi@1: aoqi@1: if (Verbose) { aoqi@1: tty->print_cr("Registers:"); aoqi@1: const int saved_regs_count = RegisterImpl::number_of_registers; aoqi@1: for (int i = 0; i < saved_regs_count; i++) { aoqi@1: Register r = as_Register(i); aoqi@1: // The registers are stored in reverse order on the stack (by pusha). aoqi@1: tty->print("%3s=" PTR_FORMAT, r->name(), saved_regs[((saved_regs_count - 1) - i)]); aoqi@1: if ((i + 1) % 4 == 0) { aoqi@1: tty->cr(); aoqi@1: } else { aoqi@1: tty->print(", "); aoqi@1: } aoqi@1: } aoqi@1: tty->cr(); aoqi@1: aoqi@1: { aoqi@1: // dumping last frame with frame::describe aoqi@1: aoqi@1: JavaThread* p = JavaThread::active(); aoqi@1: aoqi@1: ResourceMark rm; aoqi@1: PRESERVE_EXCEPTION_MARK; // may not be needed by safer and unexpensive here aoqi@1: FrameValues values; aoqi@1: aoqi@1: // Note: We want to allow trace_method_handle from any call site. aoqi@1: // While trace_method_handle creates a frame, it may be entered aoqi@1: // without a PC on the stack top (e.g. not just after a call). aoqi@1: // Walking that frame could lead to failures due to that invalid PC. aoqi@1: // => carefully detect that frame when doing the stack walking aoqi@1: aoqi@1: // Current C frame aoqi@1: frame cur_frame = os::current_frame(); aoqi@1: aoqi@1: // Robust search of trace_calling_frame (independant of inlining). aoqi@1: // Assumes saved_regs comes from a pusha in the trace_calling_frame. aoqi@1: assert(cur_frame.sp() < saved_regs, "registers not saved on stack ?"); aoqi@1: frame trace_calling_frame = os::get_sender_for_C_frame(&cur_frame); aoqi@1: while (trace_calling_frame.fp() < saved_regs) { aoqi@1: trace_calling_frame = os::get_sender_for_C_frame(&trace_calling_frame); aoqi@1: } aoqi@1: aoqi@1: // safely create a frame and call frame::describe aoqi@1: intptr_t *dump_sp = trace_calling_frame.sender_sp(); aoqi@1: intptr_t *dump_fp = trace_calling_frame.link(); aoqi@1: aoqi@1: bool walkable = has_mh; // whether the traced frame shoud be walkable aoqi@1: aoqi@1: if (walkable) { aoqi@1: // The previous definition of walkable may have to be refined aoqi@1: // if new call sites cause the next frame constructor to start aoqi@1: // failing. Alternatively, frame constructors could be aoqi@1: // modified to support the current or future non walkable aoqi@1: // frames (but this is more intrusive and is not considered as aoqi@1: // part of this RFE, which will instead use a simpler output). aoqi@1: frame dump_frame = frame(dump_sp, dump_fp); aoqi@1: dump_frame.describe(values, 1); aoqi@1: } else { aoqi@1: // Stack may not be walkable (invalid PC above FP): aoqi@1: // Add descriptions without building a Java frame to avoid issues aoqi@1: values.describe(-1, dump_fp, "fp for #1 "); aoqi@1: values.describe(-1, dump_sp, "sp for #1"); aoqi@1: } aoqi@1: values.describe(-1, entry_sp, "raw top of stack"); aoqi@1: aoqi@1: tty->print_cr("Stack layout:"); aoqi@1: values.print(p); aoqi@1: } aoqi@1: if (has_mh && mh->is_oop()) { aoqi@1: mh->print(); aoqi@1: if (java_lang_invoke_MethodHandle::is_instance(mh)) { aoqi@1: if (java_lang_invoke_MethodHandle::form_offset_in_bytes() != 0) aoqi@1: java_lang_invoke_MethodHandle::form(mh)->print(); aoqi@1: } aoqi@1: } aoqi@1: } aoqi@1: } aoqi@1: aoqi@1: // The stub wraps the arguments in a struct on the stack to avoid aoqi@1: // dealing with the different calling conventions for passing 6 aoqi@1: // arguments. aoqi@1: struct MethodHandleStubArguments { aoqi@1: const char* adaptername; aoqi@1: oopDesc* mh; aoqi@1: intptr_t* saved_regs; aoqi@1: intptr_t* entry_sp; aoqi@1: }; aoqi@1: void trace_method_handle_stub_wrapper(MethodHandleStubArguments* args) { aoqi@1: trace_method_handle_stub(args->adaptername, aoqi@1: args->mh, aoqi@1: args->saved_regs, aoqi@1: args->entry_sp); aoqi@1: } aoqi@1: aoqi@1: void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) { aoqi@1: /* aoqi@1: if (!TraceMethodHandles) return; aoqi@1: BLOCK_COMMENT("trace_method_handle {"); aoqi@1: __ enter(); aoqi@1: __ andptr(rsp, -16); // align stack if needed for FPU state aoqi@1: __ pusha(); aoqi@1: __ mov(rbx, rsp); // for retreiving saved_regs aoqi@1: // Note: saved_regs must be in the entered frame for the aoqi@1: // robust stack walking implemented in trace_method_handle_stub. aoqi@1: aoqi@1: // save FP result, valid at some call sites (adapter_opt_return_float, ...) aoqi@1: __ increment(rsp, -2 * wordSize); aoqi@1: if (UseSSE >= 2) { aoqi@1: __ movdbl(Address(rsp, 0), xmm0); aoqi@1: } else if (UseSSE == 1) { aoqi@1: __ movflt(Address(rsp, 0), xmm0); aoqi@1: } else { aoqi@1: __ fst_d(Address(rsp, 0)); aoqi@1: } aoqi@1: aoqi@1: // Incoming state: aoqi@1: // rcx: method handle aoqi@1: // aoqi@1: // To avoid calling convention issues, build a record on the stack aoqi@1: // and pass the pointer to that instead. aoqi@1: __ push(rbp); // entry_sp (with extra align space) aoqi@1: __ push(rbx); // pusha saved_regs aoqi@1: __ push(rcx); // mh aoqi@1: __ push(rcx); // slot for adaptername aoqi@1: __ movptr(Address(rsp, 0), (intptr_t) adaptername); aoqi@1: __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub_wrapper), rsp); aoqi@1: __ increment(rsp, sizeof(MethodHandleStubArguments)); aoqi@1: aoqi@1: if (UseSSE >= 2) { aoqi@1: __ movdbl(xmm0, Address(rsp, 0)); aoqi@1: } else if (UseSSE == 1) { aoqi@1: __ movflt(xmm0, Address(rsp, 0)); aoqi@1: } else { aoqi@1: __ fld_d(Address(rsp, 0)); aoqi@1: } aoqi@1: __ increment(rsp, 2 * wordSize); aoqi@1: aoqi@1: __ popa(); aoqi@1: __ leave(); aoqi@1: BLOCK_COMMENT("} trace_method_handle"); aoqi@1: */ aoqi@1: } aoqi@1: #endif //PRODUCT