jrose@1145: /* drchase@6680: * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. jrose@1145: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. jrose@1145: * jrose@1145: * This code is free software; you can redistribute it and/or modify it jrose@1145: * under the terms of the GNU General Public License version 2 only, as jrose@1145: * published by the Free Software Foundation. jrose@1145: * jrose@1145: * This code is distributed in the hope that it will be useful, but WITHOUT jrose@1145: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or jrose@1145: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License jrose@1145: * version 2 for more details (a copy is included in the LICENSE file that jrose@1145: * accompanied this code). jrose@1145: * jrose@1145: * You should have received a copy of the GNU General Public License version jrose@1145: * 2 along with this work; if not, write to the Free Software Foundation, jrose@1145: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. jrose@1145: * trims@1907: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA trims@1907: * or visit www.oracle.com if you need additional information or have any trims@1907: * questions. jrose@1145: * jrose@1145: */ jrose@1145: stefank@2314: #include "precompiled.hpp" twisti@4318: #include "asm/macroAssembler.hpp" stefank@2314: #include "interpreter/interpreter.hpp" jrose@2952: #include "interpreter/interpreterRuntime.hpp" stefank@2314: #include "memory/allocation.inline.hpp" stefank@2314: #include "prims/methodHandles.hpp" jrose@1145: drchase@6680: PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC drchase@6680: jrose@1145: #define __ _masm-> jrose@1145: jrose@2148: #ifdef PRODUCT jrose@2148: #define BLOCK_COMMENT(str) /* nothing */ twisti@3969: #define STOP(error) stop(error) jrose@2148: #else jrose@2148: #define BLOCK_COMMENT(str) __ block_comment(str) twisti@3969: #define STOP(error) block_comment(error); __ stop(error) jrose@2148: #endif jrose@2148: jrose@2148: #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") jrose@2148: never@2895: void MethodHandles::load_klass_from_Class(MacroAssembler* _masm, Register klass_reg) { never@2895: if (VerifyMethodHandles) coleenp@4037: verify_klass(_masm, klass_reg, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_Class), twisti@3969: "MH argument is a Class"); coleenp@4037: __ movptr(klass_reg, Address(klass_reg, java_lang_Class::klass_offset_in_bytes())); never@2895: } never@2895: twisti@3969: #ifdef ASSERT twisti@3969: static int check_nonzero(const char* xname, int x) { twisti@3969: assert(x != 0, err_msg("%s should be nonzero", xname)); twisti@3969: return x; never@2895: } twisti@3969: #define NONZERO(x) check_nonzero(#x, x) twisti@3969: #else //ASSERT twisti@3969: #define NONZERO(x) (x) twisti@3969: #endif //ASSERT never@2895: never@2920: #ifdef ASSERT never@2895: void MethodHandles::verify_klass(MacroAssembler* _masm, coleenp@4037: Register obj, SystemDictionary::WKID klass_id, never@2895: const char* error_message) { coleenp@4037: Klass** klass_addr = SystemDictionary::well_known_klass_addr(klass_id); coleenp@4037: KlassHandle klass = SystemDictionary::well_known_klass(klass_id); never@2895: Register temp = rdi; twisti@3969: Register temp2 = noreg; twisti@3969: LP64_ONLY(temp2 = rscratch1); // used by MacroAssembler::cmpptr never@2895: Label L_ok, L_bad; never@2895: BLOCK_COMMENT("verify_klass {"); never@2895: __ verify_oop(obj); never@2895: __ testptr(obj, obj); never@2895: __ jcc(Assembler::zero, L_bad); twisti@3969: __ push(temp); if (temp2 != noreg) __ push(temp2); twisti@3969: #define UNPUSH { if (temp2 != noreg) __ pop(temp2); __ pop(temp); } never@2895: __ load_klass(temp, obj); never@2895: __ cmpptr(temp, ExternalAddress((address) klass_addr)); never@2895: __ jcc(Assembler::equal, L_ok); never@2895: intptr_t super_check_offset = klass->super_check_offset(); never@2895: __ movptr(temp, Address(temp, super_check_offset)); never@2895: __ cmpptr(temp, ExternalAddress((address) klass_addr)); never@2895: __ jcc(Assembler::equal, L_ok); twisti@3969: UNPUSH; never@2895: __ bind(L_bad); twisti@3969: __ STOP(error_message); never@2895: __ BIND(L_ok); twisti@3969: UNPUSH; never@2895: BLOCK_COMMENT("} verify_klass"); never@2895: } twisti@3969: twisti@3969: void MethodHandles::verify_ref_kind(MacroAssembler* _masm, int ref_kind, Register member_reg, Register temp) { twisti@3969: Label L; twisti@3969: BLOCK_COMMENT("verify_ref_kind {"); twisti@3969: __ movl(temp, Address(member_reg, NONZERO(java_lang_invoke_MemberName::flags_offset_in_bytes()))); twisti@3969: __ shrl(temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT); twisti@3969: __ andl(temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK); twisti@3969: __ cmpl(temp, ref_kind); twisti@3969: __ jcc(Assembler::equal, L); twisti@3969: { char* buf = NEW_C_HEAP_ARRAY(char, 100, mtInternal); twisti@3969: jio_snprintf(buf, 100, "verify_ref_kind expected %x", ref_kind); twisti@3969: if (ref_kind == JVM_REF_invokeVirtual || twisti@3969: ref_kind == JVM_REF_invokeSpecial) twisti@3969: // could do this for all ref_kinds, but would explode assembly code size twisti@3969: trace_method_handle(_masm, buf); twisti@3969: __ STOP(buf); twisti@3969: } twisti@3969: BLOCK_COMMENT("} verify_ref_kind"); twisti@3969: __ bind(L); twisti@3969: } twisti@3969: never@2895: #endif //ASSERT jrose@1145: twisti@3969: void MethodHandles::jump_from_method_handle(MacroAssembler* _masm, Register method, Register temp, twisti@3969: bool for_compiler_entry) { twisti@3969: assert(method == rbx, "interpreter calling convention"); drchase@5800: drchase@5800: Label L_no_such_method; drchase@5800: __ testptr(rbx, rbx); drchase@5800: __ jcc(Assembler::zero, L_no_such_method); drchase@5800: coleenp@4052: __ verify_method_ptr(method); twisti@3969: twisti@3969: if (!for_compiler_entry && JvmtiExport::can_post_interpreter_events()) { never@3005: Label run_compiled_code; never@3005: // JVMTI events, such as single-stepping, are implemented partly by avoiding running never@3005: // compiled code in threads for which the event is enabled. Check here for never@3005: // interp_only_mode if these events CAN be enabled. never@3005: #ifdef _LP64 never@3005: Register rthread = r15_thread; never@3005: #else never@3005: Register rthread = temp; never@3005: __ get_thread(rthread); never@3005: #endif never@3005: // interp_only is an int, on little endian it is sufficient to test the byte only never@3005: // Is a cmpl faster? never@3005: __ cmpb(Address(rthread, JavaThread::interp_only_mode_offset()), 0); never@3005: __ jccb(Assembler::zero, run_compiled_code); coleenp@4037: __ jmp(Address(method, Method::interpreter_entry_offset())); twisti@3969: __ BIND(run_compiled_code); never@3005: } twisti@3969: coleenp@4037: const ByteSize entry_offset = for_compiler_entry ? Method::from_compiled_offset() : coleenp@4037: Method::from_interpreted_offset(); twisti@3969: __ jmp(Address(method, entry_offset)); drchase@5800: drchase@5800: __ bind(L_no_such_method); drchase@5800: __ jump(RuntimeAddress(StubRoutines::throw_AbstractMethodError_entry())); never@3005: } never@3005: twisti@3969: void MethodHandles::jump_to_lambda_form(MacroAssembler* _masm, twisti@3969: Register recv, Register method_temp, twisti@3969: Register temp2, twisti@3969: bool for_compiler_entry) { twisti@3969: BLOCK_COMMENT("jump_to_lambda_form {"); twisti@3969: // This is the initial entry point of a lazy method handle. twisti@3969: // After type checking, it picks up the invoker from the LambdaForm. twisti@3969: assert_different_registers(recv, method_temp, temp2); twisti@3969: assert(recv != noreg, "required register"); twisti@3969: assert(method_temp == rbx, "required register for loading method"); twisti@3969: twisti@3969: //NOT_PRODUCT({ FlagSetting fs(TraceMethodHandles, true); trace_method_handle(_masm, "LZMH"); }); twisti@3969: twisti@3969: // Load the invoker, as MH -> MH.form -> LF.vmentry twisti@3969: __ verify_oop(recv); twisti@3969: __ load_heap_oop(method_temp, Address(recv, NONZERO(java_lang_invoke_MethodHandle::form_offset_in_bytes()))); twisti@3969: __ verify_oop(method_temp); twisti@3969: __ load_heap_oop(method_temp, Address(method_temp, NONZERO(java_lang_invoke_LambdaForm::vmentry_offset_in_bytes()))); twisti@3969: __ verify_oop(method_temp); coleenp@4037: // the following assumes that a Method* is normally compressed in the vmtarget field: coleenp@4037: __ movptr(method_temp, Address(method_temp, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes()))); twisti@3969: twisti@3969: if (VerifyMethodHandles && !for_compiler_entry) { twisti@3969: // make sure recv is already on stack jiangli@4338: __ movptr(temp2, Address(method_temp, Method::const_offset())); twisti@3969: __ load_sized_value(temp2, jiangli@4338: Address(temp2, ConstMethod::size_of_parameters_offset()), twisti@3969: sizeof(u2), /*is_signed*/ false); coleenp@4037: // assert(sizeof(u2) == sizeof(Method::_size_of_parameters), ""); twisti@3969: Label L; twisti@3969: __ cmpptr(recv, __ argument_address(temp2, -1)); twisti@3969: __ jcc(Assembler::equal, L); twisti@3969: __ movptr(rax, __ argument_address(temp2, -1)); twisti@3969: __ STOP("receiver not on stack"); twisti@3969: __ BIND(L); twisti@3969: } twisti@3969: twisti@3969: jump_from_method_handle(_masm, method_temp, temp2, for_compiler_entry); twisti@3969: BLOCK_COMMENT("} jump_to_lambda_form"); twisti@3969: } twisti@3969: twisti@3969: jrose@1145: // Code generation twisti@3969: address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm, twisti@3969: vmIntrinsics::ID iid) { twisti@3969: const bool not_for_compiler_entry = false; // this is the interpreter entry twisti@3969: assert(is_signature_polymorphic(iid), "expected invoke iid"); twisti@3969: if (iid == vmIntrinsics::_invokeGeneric || twisti@3969: iid == vmIntrinsics::_compiledLambdaForm) { twisti@3969: // Perhaps surprisingly, the symbolic references visible to Java are not directly used. twisti@3969: // They are linked to Java-generated adapters via MethodHandleNatives.linkMethod. twisti@3969: // They all allow an appendix argument. twisti@3969: __ hlt(); // empty stubs make SG sick twisti@3969: return NULL; twisti@3969: } twisti@3969: twisti@3969: // rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted) coleenp@4037: // rbx: Method* twisti@3969: // rdx: argument locator (parameter slot count, added to rsp) twisti@3969: // rcx: used as temp to hold mh or receiver twisti@3969: // rax, rdi: garbage temps, blown away twisti@3969: Register rdx_argp = rdx; // argument list ptr, live on error paths twisti@3969: Register rax_temp = rax; twisti@3969: Register rcx_mh = rcx; // MH receiver; dies quickly and is recycled twisti@3969: Register rbx_method = rbx; // eventual target of this invocation jrose@1145: jrose@1145: // here's where control starts out: jrose@1145: __ align(CodeEntryAlignment); jrose@1145: address entry_point = __ pc(); jrose@1145: twisti@3969: if (VerifyMethodHandles) { twisti@3969: Label L; twisti@3969: BLOCK_COMMENT("verify_intrinsic_id {"); coleenp@4037: __ cmpb(Address(rbx_method, Method::intrinsic_id_offset_in_bytes()), (int) iid); twisti@3969: __ jcc(Assembler::equal, L); twisti@3969: if (iid == vmIntrinsics::_linkToVirtual || twisti@3969: iid == vmIntrinsics::_linkToSpecial) { twisti@3969: // could do this for all kinds, but would explode assembly code size coleenp@4037: trace_method_handle(_masm, "bad Method*::intrinsic_id"); jrose@1145: } coleenp@4037: __ STOP("bad Method*::intrinsic_id"); twisti@3969: __ bind(L); twisti@3969: BLOCK_COMMENT("} verify_intrinsic_id"); jrose@1145: } jrose@1145: twisti@3969: // First task: Find out how big the argument list is. twisti@3969: Address rdx_first_arg_addr; twisti@3969: int ref_kind = signature_polymorphic_intrinsic_ref_kind(iid); twisti@3969: assert(ref_kind != 0 || iid == vmIntrinsics::_invokeBasic, "must be _invokeBasic or a linkTo intrinsic"); twisti@3969: if (ref_kind == 0 || MethodHandles::ref_kind_has_receiver(ref_kind)) { jiangli@4338: __ movptr(rdx_argp, Address(rbx_method, Method::const_offset())); twisti@3969: __ load_sized_value(rdx_argp, jiangli@4338: Address(rdx_argp, ConstMethod::size_of_parameters_offset()), twisti@3969: sizeof(u2), /*is_signed*/ false); coleenp@4037: // assert(sizeof(u2) == sizeof(Method::_size_of_parameters), ""); twisti@3969: rdx_first_arg_addr = __ argument_address(rdx_argp, -1); twisti@3969: } else { twisti@3969: DEBUG_ONLY(rdx_argp = noreg); twisti@3969: } jrose@1145: twisti@3969: if (!is_signature_polymorphic_static(iid)) { twisti@3969: __ movptr(rcx_mh, rdx_first_arg_addr); twisti@3969: DEBUG_ONLY(rdx_argp = noreg); twisti@3969: } jrose@2148: twisti@3969: // rdx_first_arg_addr is live! never@2895: twisti@4158: trace_method_handle_interpreter_entry(_masm, iid); never@2895: twisti@3969: if (iid == vmIntrinsics::_invokeBasic) { twisti@3969: generate_method_handle_dispatch(_masm, iid, rcx_mh, noreg, not_for_compiler_entry); jrose@2148: twisti@3969: } else { twisti@3969: // Adjust argument list by popping the trailing MemberName argument. twisti@3969: Register rcx_recv = noreg; twisti@3969: if (MethodHandles::ref_kind_has_receiver(ref_kind)) { twisti@3969: // Load the receiver (not the MH; the actual MemberName's receiver) up from the interpreter stack. twisti@3969: __ movptr(rcx_recv = rcx, rdx_first_arg_addr); twisti@3969: } twisti@3969: DEBUG_ONLY(rdx_argp = noreg); twisti@3969: Register rbx_member = rbx_method; // MemberName ptr; incoming method ptr is dead now twisti@3969: __ pop(rax_temp); // return address twisti@3969: __ pop(rbx_member); // extract last argument twisti@3969: __ push(rax_temp); // re-push return address twisti@3969: generate_method_handle_dispatch(_masm, iid, rcx_recv, rbx_member, not_for_compiler_entry); twisti@3969: } never@3136: jrose@1145: return entry_point; jrose@1145: } jrose@1145: twisti@3969: void MethodHandles::generate_method_handle_dispatch(MacroAssembler* _masm, twisti@3969: vmIntrinsics::ID iid, twisti@3969: Register receiver_reg, twisti@3969: Register member_reg, twisti@3969: bool for_compiler_entry) { twisti@3969: assert(is_signature_polymorphic(iid), "expected invoke iid"); twisti@3969: Register rbx_method = rbx; // eventual target of this invocation twisti@3969: // temps used in this code are not used in *either* compiled or interpreted calling sequences twisti@3969: #ifdef _LP64 twisti@3969: Register temp1 = rscratch1; twisti@3969: Register temp2 = rscratch2; twisti@3969: Register temp3 = rax; twisti@3969: if (for_compiler_entry) { twisti@3969: assert(receiver_reg == (iid == vmIntrinsics::_linkToStatic ? noreg : j_rarg0), "only valid assignment"); twisti@3969: assert_different_registers(temp1, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5); twisti@3969: assert_different_registers(temp2, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5); twisti@3969: assert_different_registers(temp3, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5); jrose@1145: } twisti@3969: #else twisti@3969: Register temp1 = (for_compiler_entry ? rsi : rdx); twisti@3969: Register temp2 = rdi; twisti@3969: Register temp3 = rax; twisti@3969: if (for_compiler_entry) { twisti@3969: assert(receiver_reg == (iid == vmIntrinsics::_linkToStatic ? noreg : rcx), "only valid assignment"); twisti@3969: assert_different_registers(temp1, rcx, rdx); twisti@3969: assert_different_registers(temp2, rcx, rdx); twisti@3969: assert_different_registers(temp3, rcx, rdx); never@2895: } never@2895: #endif twisti@4101: else { twisti@4101: assert_different_registers(temp1, temp2, temp3, saved_last_sp_register()); // don't trash lastSP twisti@4101: } twisti@3969: assert_different_registers(temp1, temp2, temp3, receiver_reg); twisti@3969: assert_different_registers(temp1, temp2, temp3, member_reg); never@2895: twisti@3969: if (iid == vmIntrinsics::_invokeBasic) { twisti@3969: // indirect through MH.form.vmentry.vmtarget twisti@3969: jump_to_lambda_form(_masm, receiver_reg, rbx_method, temp1, for_compiler_entry); twisti@3969: twisti@3969: } else { twisti@3969: // The method is a member invoker used by direct method handles. twisti@3969: if (VerifyMethodHandles) { twisti@3969: // make sure the trailing argument really is a MemberName (caller responsibility) coleenp@4037: verify_klass(_masm, member_reg, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_invoke_MemberName), twisti@3969: "MemberName required for invokeVirtual etc."); never@2895: } twisti@3969: twisti@3969: Address member_clazz( member_reg, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes())); twisti@3969: Address member_vmindex( member_reg, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes())); twisti@3969: Address member_vmtarget( member_reg, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes())); twisti@3969: twisti@3969: Register temp1_recv_klass = temp1; twisti@3969: if (iid != vmIntrinsics::_linkToStatic) { twisti@3969: __ verify_oop(receiver_reg); twisti@3969: if (iid == vmIntrinsics::_linkToSpecial) { twisti@3969: // Don't actually load the klass; just null-check the receiver. twisti@3969: __ null_check(receiver_reg); twisti@3969: } else { twisti@3969: // load receiver klass itself twisti@3969: __ null_check(receiver_reg, oopDesc::klass_offset_in_bytes()); twisti@3969: __ load_klass(temp1_recv_klass, receiver_reg); coleenp@4052: __ verify_klass_ptr(temp1_recv_klass); twisti@3969: } twisti@3969: BLOCK_COMMENT("check_receiver {"); twisti@3969: // The receiver for the MemberName must be in receiver_reg. twisti@3969: // Check the receiver against the MemberName.clazz twisti@3969: if (VerifyMethodHandles && iid == vmIntrinsics::_linkToSpecial) { twisti@3969: // Did not load it above... twisti@3969: __ load_klass(temp1_recv_klass, receiver_reg); coleenp@4052: __ verify_klass_ptr(temp1_recv_klass); twisti@3969: } twisti@3969: if (VerifyMethodHandles && iid != vmIntrinsics::_linkToInterface) { twisti@3969: Label L_ok; twisti@3969: Register temp2_defc = temp2; twisti@3969: __ load_heap_oop(temp2_defc, member_clazz); twisti@3969: load_klass_from_Class(_masm, temp2_defc); coleenp@4052: __ verify_klass_ptr(temp2_defc); twisti@3969: __ check_klass_subtype(temp1_recv_klass, temp2_defc, temp3, L_ok); twisti@3969: // If we get here, the type check failed! twisti@3969: __ STOP("receiver class disagrees with MemberName.clazz"); twisti@3969: __ bind(L_ok); twisti@3969: } twisti@3969: BLOCK_COMMENT("} check_receiver"); twisti@3969: } twisti@3969: if (iid == vmIntrinsics::_linkToSpecial || twisti@3969: iid == vmIntrinsics::_linkToStatic) { twisti@3969: DEBUG_ONLY(temp1_recv_klass = noreg); // these guys didn't load the recv_klass twisti@3969: } twisti@3969: twisti@3969: // Live registers at this point: twisti@3969: // member_reg - MemberName that was the trailing argument twisti@3969: // temp1_recv_klass - klass of stacked receiver, if needed twisti@3969: // rsi/r13 - interpreter linkage (if interpreted) zmajo@7854: // rcx, rdx, rsi, rdi, r8 - compiler arguments (if compiled) twisti@3969: twisti@4101: Label L_incompatible_class_change_error; twisti@3969: switch (iid) { twisti@3969: case vmIntrinsics::_linkToSpecial: twisti@3969: if (VerifyMethodHandles) { twisti@3969: verify_ref_kind(_masm, JVM_REF_invokeSpecial, member_reg, temp3); twisti@3969: } coleenp@4037: __ movptr(rbx_method, member_vmtarget); twisti@3969: break; twisti@3969: twisti@3969: case vmIntrinsics::_linkToStatic: twisti@3969: if (VerifyMethodHandles) { twisti@3969: verify_ref_kind(_masm, JVM_REF_invokeStatic, member_reg, temp3); twisti@3969: } coleenp@4037: __ movptr(rbx_method, member_vmtarget); twisti@3969: break; twisti@3969: twisti@3969: case vmIntrinsics::_linkToVirtual: twisti@3969: { twisti@3969: // same as TemplateTable::invokevirtual, twisti@3969: // minus the CP setup and profiling: twisti@3969: twisti@3969: if (VerifyMethodHandles) { twisti@3969: verify_ref_kind(_masm, JVM_REF_invokeVirtual, member_reg, temp3); twisti@3969: } twisti@3969: twisti@3969: // pick out the vtable index from the MemberName, and then we can discard it: twisti@3969: Register temp2_index = temp2; twisti@3969: __ movptr(temp2_index, member_vmindex); twisti@3969: twisti@3969: if (VerifyMethodHandles) { twisti@3969: Label L_index_ok; twisti@3969: __ cmpl(temp2_index, 0); twisti@3969: __ jcc(Assembler::greaterEqual, L_index_ok); twisti@3969: __ STOP("no virtual index"); twisti@3969: __ BIND(L_index_ok); twisti@3969: } twisti@3969: twisti@3969: // Note: The verifier invariants allow us to ignore MemberName.clazz and vmtarget twisti@3969: // at this point. And VerifyMethodHandles has already checked clazz, if needed. twisti@3969: coleenp@4037: // get target Method* & entry point twisti@3969: __ lookup_virtual_method(temp1_recv_klass, temp2_index, rbx_method); twisti@3969: break; twisti@3969: } twisti@3969: twisti@3969: case vmIntrinsics::_linkToInterface: twisti@3969: { twisti@3969: // same as TemplateTable::invokeinterface twisti@3969: // (minus the CP setup and profiling, with different argument motion) twisti@3969: if (VerifyMethodHandles) { twisti@3969: verify_ref_kind(_masm, JVM_REF_invokeInterface, member_reg, temp3); twisti@3969: } twisti@3969: twisti@3969: Register temp3_intf = temp3; twisti@3969: __ load_heap_oop(temp3_intf, member_clazz); twisti@3969: load_klass_from_Class(_masm, temp3_intf); coleenp@4052: __ verify_klass_ptr(temp3_intf); twisti@3969: twisti@3969: Register rbx_index = rbx_method; twisti@3969: __ movptr(rbx_index, member_vmindex); twisti@3969: if (VerifyMethodHandles) { twisti@3969: Label L; twisti@3969: __ cmpl(rbx_index, 0); twisti@3969: __ jcc(Assembler::greaterEqual, L); twisti@3969: __ STOP("invalid vtable index for MH.invokeInterface"); twisti@3969: __ bind(L); twisti@3969: } twisti@3969: twisti@3969: // given intf, index, and recv klass, dispatch to the implementation method twisti@3969: __ lookup_interface_method(temp1_recv_klass, temp3_intf, twisti@3969: // note: next two args must be the same: twisti@3969: rbx_index, rbx_method, twisti@3969: temp2, twisti@4101: L_incompatible_class_change_error); twisti@3969: break; twisti@3969: } twisti@3969: twisti@3969: default: twisti@4101: fatal(err_msg_res("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid))); twisti@3969: break; twisti@3969: } twisti@3969: twisti@4101: // Live at this point: twisti@4101: // rbx_method twisti@4101: // rsi/r13 (if interpreted) twisti@3969: twisti@4101: // After figuring out which concrete method to call, jump into it. twisti@4101: // Note that this works in the interpreter with no data motion. twisti@4101: // But the compiled version will require that rcx_recv be shifted out. twisti@4101: __ verify_method_ptr(rbx_method); twisti@4101: jump_from_method_handle(_masm, rbx_method, temp1, for_compiler_entry); twisti@4101: twisti@4101: if (iid == vmIntrinsics::_linkToInterface) { twisti@4101: __ bind(L_incompatible_class_change_error); twisti@4101: __ jump(RuntimeAddress(StubRoutines::throw_IncompatibleClassChangeError_entry())); twisti@3969: } never@2895: } never@2895: } never@2895: bdelsart@3451: #ifndef PRODUCT jrose@1145: void trace_method_handle_stub(const char* adaptername, never@2895: oop mh, never@2895: intptr_t* saved_regs, twisti@3566: intptr_t* entry_sp) { jrose@1145: // called as a leaf from native code: do not block the JVM! twisti@3969: bool has_mh = (strstr(adaptername, "/static") == NULL && twisti@3969: strstr(adaptername, "linkTo") == NULL); // static linkers don't have MH twisti@3566: const char* mh_reg_name = has_mh ? "rcx_mh" : "rcx"; kevinw@9327: tty->print_cr("MH %s %s=" PTR_FORMAT " sp=" PTR_FORMAT, twisti@3969: adaptername, mh_reg_name, hseigel@5784: (void *)mh, entry_sp); bdelsart@3451: jrose@2148: if (Verbose) { twisti@3566: tty->print_cr("Registers:"); twisti@3566: const int saved_regs_count = RegisterImpl::number_of_registers; twisti@3566: for (int i = 0; i < saved_regs_count; i++) { twisti@3566: Register r = as_Register(i); twisti@3566: // The registers are stored in reverse order on the stack (by pusha). twisti@3566: tty->print("%3s=" PTR_FORMAT, r->name(), saved_regs[((saved_regs_count - 1) - i)]); twisti@3566: if ((i + 1) % 4 == 0) { never@2895: tty->cr(); twisti@3566: } else { twisti@3566: tty->print(", "); never@2895: } never@2895: } never@2895: tty->cr(); bdelsart@3451: bdelsart@3451: { bdelsart@3451: // dumping last frame with frame::describe bdelsart@3451: bdelsart@3451: JavaThread* p = JavaThread::active(); bdelsart@3451: bdelsart@3451: ResourceMark rm; bdelsart@3451: PRESERVE_EXCEPTION_MARK; // may not be needed by safer and unexpensive here bdelsart@3451: FrameValues values; bdelsart@3451: bdelsart@3451: // Note: We want to allow trace_method_handle from any call site. bdelsart@3451: // While trace_method_handle creates a frame, it may be entered bdelsart@3451: // without a PC on the stack top (e.g. not just after a call). bdelsart@3451: // Walking that frame could lead to failures due to that invalid PC. bdelsart@3451: // => carefully detect that frame when doing the stack walking bdelsart@3451: bdelsart@3451: // Current C frame bdelsart@3451: frame cur_frame = os::current_frame(); bdelsart@3451: bdelsart@3451: // Robust search of trace_calling_frame (independant of inlining). bdelsart@3451: // Assumes saved_regs comes from a pusha in the trace_calling_frame. bdelsart@3451: assert(cur_frame.sp() < saved_regs, "registers not saved on stack ?"); bdelsart@3451: frame trace_calling_frame = os::get_sender_for_C_frame(&cur_frame); bdelsart@3451: while (trace_calling_frame.fp() < saved_regs) { bdelsart@3451: trace_calling_frame = os::get_sender_for_C_frame(&trace_calling_frame); bdelsart@3451: } bdelsart@3451: bdelsart@3451: // safely create a frame and call frame::describe bdelsart@3451: intptr_t *dump_sp = trace_calling_frame.sender_sp(); bdelsart@3451: intptr_t *dump_fp = trace_calling_frame.link(); bdelsart@3451: bdelsart@3451: bool walkable = has_mh; // whether the traced frame shoud be walkable bdelsart@3451: bdelsart@3451: if (walkable) { bdelsart@3451: // The previous definition of walkable may have to be refined bdelsart@3451: // if new call sites cause the next frame constructor to start bdelsart@3451: // failing. Alternatively, frame constructors could be bdelsart@3451: // modified to support the current or future non walkable bdelsart@3451: // frames (but this is more intrusive and is not considered as bdelsart@3451: // part of this RFE, which will instead use a simpler output). bdelsart@3451: frame dump_frame = frame(dump_sp, dump_fp); bdelsart@3451: dump_frame.describe(values, 1); bdelsart@3451: } else { bdelsart@3451: // Stack may not be walkable (invalid PC above FP): bdelsart@3451: // Add descriptions without building a Java frame to avoid issues bdelsart@3451: values.describe(-1, dump_fp, "fp for #1 "); bdelsart@3451: values.describe(-1, dump_sp, "sp for #1"); bdelsart@3451: } twisti@3969: values.describe(-1, entry_sp, "raw top of stack"); bdelsart@3451: twisti@3566: tty->print_cr("Stack layout:"); bdelsart@3451: values.print(p); never@2895: } twisti@3969: if (has_mh && mh->is_oop()) { twisti@3969: mh->print(); twisti@3969: if (java_lang_invoke_MethodHandle::is_instance(mh)) { twisti@3969: if (java_lang_invoke_MethodHandle::form_offset_in_bytes() != 0) twisti@3969: java_lang_invoke_MethodHandle::form(mh)->print(); twisti@3969: } twisti@3969: } jrose@2148: } jrose@2148: } never@2895: never@2895: // The stub wraps the arguments in a struct on the stack to avoid never@2895: // dealing with the different calling conventions for passing 6 never@2895: // arguments. never@2895: struct MethodHandleStubArguments { never@2895: const char* adaptername; never@2895: oopDesc* mh; never@2895: intptr_t* saved_regs; never@2895: intptr_t* entry_sp; never@2895: }; never@2895: void trace_method_handle_stub_wrapper(MethodHandleStubArguments* args) { never@2895: trace_method_handle_stub(args->adaptername, never@2895: args->mh, never@2895: args->saved_regs, twisti@3566: args->entry_sp); never@2895: } never@2895: jrose@2148: void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) { jrose@2148: if (!TraceMethodHandles) return; jrose@2148: BLOCK_COMMENT("trace_method_handle {"); bdelsart@3451: __ enter(); bdelsart@3451: __ andptr(rsp, -16); // align stack if needed for FPU state jrose@2148: __ pusha(); bdelsart@3451: __ mov(rbx, rsp); // for retreiving saved_regs bdelsart@3451: // Note: saved_regs must be in the entered frame for the bdelsart@3451: // robust stack walking implemented in trace_method_handle_stub. bdelsart@3451: bdelsart@3451: // save FP result, valid at some call sites (adapter_opt_return_float, ...) bdelsart@3451: __ increment(rsp, -2 * wordSize); bdelsart@3451: if (UseSSE >= 2) { bdelsart@3451: __ movdbl(Address(rsp, 0), xmm0); bdelsart@3451: } else if (UseSSE == 1) { bdelsart@3451: __ movflt(Address(rsp, 0), xmm0); bdelsart@3451: } else { bdelsart@3451: __ fst_d(Address(rsp, 0)); bdelsart@3451: } bdelsart@3451: twisti@3566: // Incoming state: never@2868: // rcx: method handle twisti@3566: // twisti@3566: // To avoid calling convention issues, build a record on the stack twisti@3566: // and pass the pointer to that instead. bdelsart@3451: __ push(rbp); // entry_sp (with extra align space) never@2895: __ push(rbx); // pusha saved_regs never@2895: __ push(rcx); // mh bdelsart@3451: __ push(rcx); // slot for adaptername never@2895: __ movptr(Address(rsp, 0), (intptr_t) adaptername); never@2895: __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub_wrapper), rsp); twisti@3566: __ increment(rsp, sizeof(MethodHandleStubArguments)); bdelsart@3451: bdelsart@3451: if (UseSSE >= 2) { bdelsart@3451: __ movdbl(xmm0, Address(rsp, 0)); bdelsart@3451: } else if (UseSSE == 1) { bdelsart@3451: __ movflt(xmm0, Address(rsp, 0)); bdelsart@3451: } else { bdelsart@3451: __ fld_d(Address(rsp, 0)); bdelsart@3451: } bdelsart@3451: __ increment(rsp, 2 * wordSize); bdelsart@3451: bdelsart@3451: __ popa(); never@2895: __ leave(); jrose@2148: BLOCK_COMMENT("} trace_method_handle"); jrose@1145: } jrose@1145: #endif //PRODUCT