jrose@1145: /* bdelsart@3445: * Copyright (c) 2008, 2012, 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" stefank@2314: #include "interpreter/interpreter.hpp" stefank@2314: #include "memory/allocation.inline.hpp" stefank@2314: #include "prims/methodHandles.hpp" jrose@1145: jrose@1145: #define __ _masm-> jrose@1145: twisti@2204: #ifdef PRODUCT twisti@2204: #define BLOCK_COMMENT(str) /* nothing */ twisti@3969: #define STOP(error) stop(error) twisti@2204: #else twisti@2204: #define BLOCK_COMMENT(str) __ block_comment(str) twisti@3969: #define STOP(error) block_comment(error); __ stop(error) twisti@2204: #endif twisti@2204: twisti@2204: #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") twisti@2204: twisti@3969: // Workaround for C++ overloading nastiness on '0' for RegisterOrConstant. twisti@3969: static RegisterOrConstant constant(int value) { twisti@3969: return RegisterOrConstant(value); jrose@1145: } jrose@1145: never@2950: void MethodHandles::load_klass_from_Class(MacroAssembler* _masm, Register klass_reg, Register temp_reg, Register temp2_reg) { never@2950: if (VerifyMethodHandles) never@2950: verify_klass(_masm, klass_reg, SystemDictionaryHandles::Class_klass(), temp_reg, temp2_reg, twisti@3969: "MH argument is a Class"); never@2950: __ load_heap_oop(Address(klass_reg, java_lang_Class::klass_offset_in_bytes()), klass_reg); never@2950: } never@2950: 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@2950: } twisti@3969: #define NONZERO(x) check_nonzero(#x, x) twisti@3969: #else //ASSERT twisti@3969: #define NONZERO(x) (x) twisti@3969: #endif //ASSERT never@2950: never@2950: #ifdef ASSERT never@2950: void MethodHandles::verify_klass(MacroAssembler* _masm, never@2950: Register obj_reg, KlassHandle klass, never@2950: Register temp_reg, Register temp2_reg, never@2950: const char* error_message) { never@2950: oop* klass_addr = klass.raw_value(); never@2950: assert(klass_addr >= SystemDictionaryHandles::Object_klass().raw_value() && never@2950: klass_addr <= SystemDictionaryHandles::Long_klass().raw_value(), never@2950: "must be one of the SystemDictionaryHandles"); twisti@3969: bool did_save = false; twisti@3969: if (temp_reg == noreg || temp2_reg == noreg) { twisti@3969: temp_reg = L1; twisti@3969: temp2_reg = L2; twisti@3969: __ save_frame_and_mov(0, obj_reg, L0); twisti@3969: obj_reg = L0; twisti@3969: did_save = true; twisti@3969: } never@2950: Label L_ok, L_bad; never@2950: BLOCK_COMMENT("verify_klass {"); never@2950: __ verify_oop(obj_reg); kvn@3037: __ br_null_short(obj_reg, Assembler::pn, L_bad); never@2950: __ load_klass(obj_reg, temp_reg); never@2950: __ set(ExternalAddress(klass_addr), temp2_reg); never@2950: __ ld_ptr(Address(temp2_reg, 0), temp2_reg); kvn@3037: __ cmp_and_brx_short(temp_reg, temp2_reg, Assembler::equal, Assembler::pt, L_ok); never@2950: intptr_t super_check_offset = klass->super_check_offset(); never@2950: __ ld_ptr(Address(temp_reg, super_check_offset), temp_reg); never@2950: __ set(ExternalAddress(klass_addr), temp2_reg); never@2950: __ ld_ptr(Address(temp2_reg, 0), temp2_reg); kvn@3037: __ cmp_and_brx_short(temp_reg, temp2_reg, Assembler::equal, Assembler::pt, L_ok); never@2950: __ BIND(L_bad); twisti@3969: if (did_save) __ restore(); twisti@3969: __ STOP(error_message); never@2950: __ BIND(L_ok); twisti@3969: if (did_save) __ restore(); never@2950: BLOCK_COMMENT("} verify_klass"); never@2950: } 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: __ lduw(Address(member_reg, NONZERO(java_lang_invoke_MemberName::flags_offset_in_bytes())), temp); twisti@3969: __ srl( temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT, temp); twisti@3969: __ and3(temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK, temp); twisti@3969: __ cmp_and_br_short(temp, ref_kind, Assembler::equal, Assembler::pt, 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@2950: #endif // ASSERT jrose@1145: twisti@3969: void MethodHandles::jump_from_method_handle(MacroAssembler* _masm, Register method, Register target, Register temp, twisti@3969: bool for_compiler_entry) { never@3005: assert(method == G5_method, "interpreter calling convention"); never@3005: __ verify_oop(method); twisti@3969: twisti@3969: if (!for_compiler_entry && JvmtiExport::can_post_interpreter_events()) { twisti@3969: 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: __ verify_thread(); never@3005: const Address interp_only(G2_thread, JavaThread::interp_only_mode_offset()); never@3005: __ ld(interp_only, temp); twisti@3969: __ cmp_and_br_short(temp, 0, Assembler::zero, Assembler::pt, run_compiled_code); twisti@3969: __ ld_ptr(G5_method, in_bytes(methodOopDesc::interpreter_entry_offset()), target); twisti@3969: __ jmp(target, 0); twisti@3969: __ delayed()->nop(); twisti@3969: __ BIND(run_compiled_code); twisti@3969: // Note: we could fill some delay slots here, but twisti@3969: // it doesn't matter, since this is interpreter code. never@3005: } twisti@3969: twisti@3969: const ByteSize entry_offset = for_compiler_entry ? methodOopDesc::from_compiled_offset() : twisti@3969: methodOopDesc::from_interpreted_offset(); twisti@3969: __ ld_ptr(G5_method, in_bytes(entry_offset), target); never@3005: __ jmp(target, 0); never@3005: __ delayed()->nop(); 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, Register temp3, 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, temp3); twisti@3969: assert(method_temp == G5_method, "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(Address(recv, NONZERO(java_lang_invoke_MethodHandle::form_offset_in_bytes())), method_temp); twisti@3969: __ verify_oop(method_temp); twisti@3969: __ load_heap_oop(Address(method_temp, NONZERO(java_lang_invoke_LambdaForm::vmentry_offset_in_bytes())), method_temp); twisti@3969: __ verify_oop(method_temp); twisti@3969: // the following assumes that a methodOop is normally compressed in the vmtarget field: twisti@3969: __ load_heap_oop(Address(method_temp, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes())), method_temp); twisti@3969: __ verify_oop(method_temp); twisti@3969: twisti@3969: if (VerifyMethodHandles && !for_compiler_entry) { twisti@3969: // make sure recv is already on stack twisti@3969: __ load_sized_value(Address(method_temp, methodOopDesc::size_of_parameters_offset()), twisti@3969: temp2, twisti@3969: sizeof(u2), /*is_signed*/ false); twisti@3969: // assert(sizeof(u2) == sizeof(methodOopDesc::_size_of_parameters), ""); twisti@3969: Label L; twisti@3969: __ ld_ptr(__ argument_address(temp2, temp2, -1), temp2); twisti@3969: __ cmp_and_br_short(temp2, recv, Assembler::equal, Assembler::pt, L); 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, temp3, for_compiler_entry); twisti@3969: BLOCK_COMMENT("} jump_to_lambda_form"); twisti@3969: } twisti@3969: never@3005: 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: __ should_not_reach_here(); // empty stubs make SG sick twisti@3969: return NULL; twisti@3969: } twisti@3969: twisti@3969: // I5_savedSP/O5_savedSP: sender SP (must preserve; see prepare_to_jump_from_interpreted) twisti@3969: // G5_method: methodOop twisti@1858: // G4 (Gargs): incoming argument list (must preserve) twisti@3969: // O0: used as temp to hold mh or receiver twisti@3969: // O1, O4: garbage temps, blown away twisti@3969: Register O1_scratch = O1; twisti@3969: Register O4_param_size = O4; // size of parameters twisti@1858: twisti@3969: address code_start = __ pc(); twisti@1858: twisti@1858: // here's where control starts out: twisti@1858: __ align(CodeEntryAlignment); twisti@1858: address entry_point = __ pc(); twisti@1858: twisti@3969: if (VerifyMethodHandles) { twisti@3969: Label L; twisti@3969: BLOCK_COMMENT("verify_intrinsic_id {"); twisti@3969: __ ldub(Address(G5_method, methodOopDesc::intrinsic_id_offset_in_bytes()), O1_scratch); twisti@3969: __ cmp_and_br_short(O1_scratch, (int) iid, Assembler::equal, Assembler::pt, 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 twisti@3969: trace_method_handle(_masm, "bad methodOop::intrinsic_id"); twisti@1858: } twisti@3969: __ STOP("bad methodOop::intrinsic_id"); twisti@3969: __ bind(L); twisti@3969: BLOCK_COMMENT("} verify_intrinsic_id"); twisti@1858: } twisti@1858: twisti@3969: // First task: Find out how big the argument list is. twisti@3969: Address O4_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)) { twisti@3969: __ load_sized_value(Address(G5_method, methodOopDesc::size_of_parameters_offset()), twisti@3969: O4_param_size, twisti@3969: sizeof(u2), /*is_signed*/ false); twisti@3969: // assert(sizeof(u2) == sizeof(methodOopDesc::_size_of_parameters), ""); twisti@3969: O4_first_arg_addr = __ argument_address(O4_param_size, O4_param_size, -1); twisti@3969: } else { twisti@3969: DEBUG_ONLY(O4_param_size = noreg); twisti@3969: } twisti@1858: twisti@3969: Register O0_mh = noreg; twisti@3969: if (!is_signature_polymorphic_static(iid)) { twisti@3969: __ ld_ptr(O4_first_arg_addr, O0_mh = O0); twisti@3969: DEBUG_ONLY(O4_param_size = noreg); twisti@3969: } jrose@2266: twisti@3969: // O4_first_arg_addr is live! never@2950: twisti@3969: if (TraceMethodHandles) { twisti@3969: const char* name = vmIntrinsics::name_at(iid); twisti@3969: if (*name == '_') name += 1; twisti@3969: const size_t len = strlen(name) + 50; twisti@3969: char* qname = NEW_C_HEAP_ARRAY(char, len, mtInternal); twisti@3969: const char* suffix = ""; twisti@3969: if (vmIntrinsics::method_for(iid) == NULL || twisti@3969: !vmIntrinsics::method_for(iid)->access_flags().is_public()) { twisti@3969: if (is_signature_polymorphic_static(iid)) twisti@3969: suffix = "/static"; twisti@3969: else twisti@3969: suffix = "/private"; twisti@3969: } twisti@3969: jio_snprintf(qname, len, "MethodHandle::interpreter_entry::%s%s", name, suffix); twisti@3969: if (O0_mh != noreg) twisti@3969: __ mov(O0_mh, G3_method_handle); // make stub happy twisti@3969: trace_method_handle(_masm, qname); twisti@3969: } never@2950: twisti@3969: if (iid == vmIntrinsics::_invokeBasic) { twisti@3969: generate_method_handle_dispatch(_masm, iid, O0_mh, noreg, not_for_compiler_entry); twisti@1858: twisti@3969: } else { twisti@3969: // Adjust argument list by popping the trailing MemberName argument. twisti@3969: Register O0_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: __ ld_ptr(O4_first_arg_addr, O0_recv = O0); twisti@3969: DEBUG_ONLY(O4_param_size = noreg); twisti@3969: } twisti@3969: Register G5_member = G5_method; // MemberName ptr; incoming method ptr is dead now twisti@3969: __ ld_ptr(__ argument_address(constant(0)), G5_member); twisti@3969: __ add(Gargs, Interpreter::stackElementSize, Gargs); twisti@3969: generate_method_handle_dispatch(_masm, iid, O0_recv, G5_member, not_for_compiler_entry); jrose@2266: } jrose@2266: twisti@3969: if (PrintMethodHandleStubs) { twisti@3969: address code_end = __ pc(); twisti@3969: tty->print_cr("--------"); twisti@3969: tty->print_cr("method handle interpreter entry for %s", vmIntrinsics::name_at(iid)); twisti@3969: Disassembler::decode(code_start, code_end); twisti@3969: tty->cr(); twisti@3969: } jrose@2266: twisti@1858: 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: // temps used in this code are not used in *either* compiled or interpreted calling sequences twisti@3969: Register temp1 = (for_compiler_entry ? G1_scratch : O1); twisti@3969: Register temp2 = (for_compiler_entry ? G4_scratch : O4); twisti@3969: Register temp3 = G3_scratch; twisti@3969: Register temp4 = (for_compiler_entry ? noreg : O2); twisti@3969: if (for_compiler_entry) { twisti@3969: assert(receiver_reg == (iid == vmIntrinsics::_linkToStatic ? noreg : O0), "only valid assignment"); twisti@3969: assert_different_registers(temp1, O0, O1, O2, O3, O4, O5); twisti@3969: assert_different_registers(temp2, O0, O1, O2, O3, O4, O5); twisti@3969: assert_different_registers(temp3, O0, O1, O2, O3, O4, O5); twisti@3969: assert_different_registers(temp4, O0, O1, O2, O3, O4, O5); twisti@3969: } twisti@3969: if (receiver_reg != noreg) assert_different_registers(temp1, temp2, temp3, temp4, receiver_reg); twisti@3969: if (member_reg != noreg) assert_different_registers(temp1, temp2, temp3, temp4, member_reg); twisti@3969: if (!for_compiler_entry) assert_different_registers(temp1, temp2, temp3, temp4, O5_savedSP); // don't trash lastSP twisti@1858: twisti@3969: if (iid == vmIntrinsics::_invokeBasic) { twisti@3969: // indirect through MH.form.vmentry.vmtarget twisti@3969: jump_to_lambda_form(_masm, receiver_reg, G5_method, temp2, temp3, for_compiler_entry); never@2950: never@2950: } 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) twisti@3969: verify_klass(_masm, member_reg, SystemDictionaryHandles::MemberName_klass(), twisti@3969: temp1, temp2, twisti@3969: "MemberName required for invokeVirtual etc."); twisti@3969: } 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(receiver_reg, temp1_recv_klass); twisti@3969: __ verify_oop(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(receiver_reg, temp1_recv_klass); twisti@3969: __ verify_oop(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(member_clazz, temp2_defc); twisti@3969: load_klass_from_Class(_masm, temp2_defc, temp3, temp4); twisti@3969: __ verify_oop(temp2_defc); twisti@3969: __ check_klass_subtype(temp1_recv_klass, temp2_defc, temp3, temp4, 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: // O5_savedSP - interpreter linkage (if interpreted) twisti@3969: // O0..O7,G1,G4 - compiler arguments (if compiled) twisti@3969: twisti@3969: bool method_is_live = false; 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: } twisti@3969: __ load_heap_oop(member_vmtarget, G5_method); twisti@3969: method_is_live = true; 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: } twisti@3969: __ load_heap_oop(member_vmtarget, G5_method); twisti@3969: method_is_live = true; twisti@3969: break; twisti@3969: twisti@3969: case vmIntrinsics::_linkToVirtual: never@2950: { 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: __ ld_ptr(member_vmindex, temp2_index); twisti@3969: twisti@3969: if (VerifyMethodHandles) { twisti@3969: Label L_index_ok; twisti@3969: __ cmp_and_br_short(temp2_index, (int) 0, Assembler::greaterEqual, Assembler::pn, 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: twisti@3969: // get target methodOop & entry point twisti@3969: __ lookup_virtual_method(temp1_recv_klass, temp2_index, G5_method); twisti@3969: method_is_live = true; twisti@3969: break; never@2950: } 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(member_clazz, temp3_intf); twisti@3969: load_klass_from_Class(_masm, temp3_intf, temp2, temp4); twisti@3969: __ verify_oop(temp3_intf); twisti@3969: twisti@3969: Register G5_index = G5_method; twisti@3969: __ ld_ptr(member_vmindex, G5_index); twisti@3969: if (VerifyMethodHandles) { twisti@3969: Label L; twisti@3969: __ cmp_and_br_short(G5_index, 0, Assembler::greaterEqual, Assembler::pt, 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: Label L_no_such_interface; twisti@3969: Register no_sethi_temp = noreg; twisti@3969: __ lookup_interface_method(temp1_recv_klass, temp3_intf, twisti@3969: // note: next two args must be the same: twisti@3969: G5_index, G5_method, twisti@3969: temp2, no_sethi_temp, twisti@3969: L_no_such_interface); twisti@3969: twisti@3969: __ verify_oop(G5_method); twisti@3969: jump_from_method_handle(_masm, G5_method, temp2, temp3, for_compiler_entry); twisti@3969: twisti@3969: __ bind(L_no_such_interface); twisti@3969: AddressLiteral icce(StubRoutines::throw_IncompatibleClassChangeError_entry()); twisti@3969: __ jump_to(icce, temp3); twisti@3969: __ delayed()->nop(); twisti@3969: break; twisti@3969: } twisti@3969: twisti@3969: default: twisti@3969: fatal(err_msg("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid))); twisti@3969: break; twisti@3969: } twisti@3969: twisti@3969: if (method_is_live) { twisti@3969: // live at this point: G5_method, O5_savedSP (if interpreted) twisti@3969: twisti@3969: // After figuring out which concrete method to call, jump into it. twisti@3969: // Note that this works in the interpreter with no data motion. twisti@3969: // But the compiled version will require that rcx_recv be shifted out. twisti@3969: __ verify_oop(G5_method); twisti@3969: jump_from_method_handle(_masm, G5_method, temp1, temp3, for_compiler_entry); twisti@3969: } never@2950: } twisti@1858: } twisti@1858: bdelsart@3451: #ifndef PRODUCT twisti@1858: void trace_method_handle_stub(const char* adaptername, never@2868: oopDesc* mh, bdelsart@3451: intptr_t* saved_sp, bdelsart@3451: intptr_t* args, bdelsart@3451: intptr_t* tracing_fp) { twisti@3969: bool has_mh = (strstr(adaptername, "/static") == NULL && twisti@3969: strstr(adaptername, "linkTo") == NULL); // static linkers don't have MH twisti@3969: const char* mh_reg_name = has_mh ? "G3_mh" : "G3"; twisti@3969: tty->print_cr("MH %s %s="INTPTR_FORMAT " saved_sp=" INTPTR_FORMAT " args=" INTPTR_FORMAT, twisti@3969: adaptername, mh_reg_name, twisti@3969: (intptr_t) mh, saved_sp, args); bdelsart@3451: bdelsart@3451: if (Verbose) { 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 valid return PC in O7 (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: // walk up to the right frame using the "tracing_fp" argument bdelsart@3451: intptr_t* cur_sp = StubRoutines::Sparc::flush_callers_register_windows_func()(); bdelsart@3451: frame cur_frame(cur_sp, frame::unpatchable, NULL); bdelsart@3451: bdelsart@3451: while (cur_frame.fp() != (intptr_t *)(STACK_BIAS+(uintptr_t)tracing_fp)) { bdelsart@3451: cur_frame = os::get_sender_for_C_frame(&cur_frame); bdelsart@3451: } bdelsart@3451: bdelsart@3451: // safely create a frame and call frame::describe bdelsart@3451: intptr_t *dump_sp = cur_frame.sender_sp(); bdelsart@3451: intptr_t *dump_fp = cur_frame.link(); bdelsart@3451: bdelsart@3451: bool walkable = has_mh; // whether the traced frame shoud be walkable bdelsart@3451: bdelsart@3451: // the sender for cur_frame is the caller of trace_method_handle 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, bdelsart@3451: cur_frame.sp(), // younger_sp bdelsart@3451: false); // no adaptation bdelsart@3451: dump_frame.describe(values, 1); bdelsart@3451: } else { bdelsart@3451: // Robust dump for frames which cannot be constructed from sp/younger_sp 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"); bdelsart@3451: } bdelsart@3451: bdelsart@3451: bool has_args = has_mh; // whether Gargs is meaningful bdelsart@3451: bdelsart@3451: // mark args, if seems valid (may not be valid for some adapters) bdelsart@3451: if (has_args) { bdelsart@3451: if ((args >= dump_sp) && (args < dump_fp)) { bdelsart@3451: values.describe(-1, args, "*G4_args"); bdelsart@3451: } bdelsart@3451: } bdelsart@3451: bdelsart@3451: // mark saved_sp, if seems valid (may not be valid for some adapters) bdelsart@3451: intptr_t *unbiased_sp = (intptr_t *)(STACK_BIAS+(uintptr_t)saved_sp); twisti@3969: const int ARG_LIMIT = 255, SLOP = 45, UNREASONABLE_STACK_MOVE = (ARG_LIMIT + SLOP); bdelsart@3451: if ((unbiased_sp >= dump_sp - UNREASONABLE_STACK_MOVE) && (unbiased_sp < dump_fp)) { bdelsart@3451: values.describe(-1, unbiased_sp, "*saved_sp+STACK_BIAS"); bdelsart@3451: } bdelsart@3451: bdelsart@3451: // Note: the unextended_sp may not be correct bdelsart@3451: tty->print_cr(" stack layout:"); bdelsart@3451: values.print(p); 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: } bdelsart@3451: } twisti@1858: } bdelsart@3451: twisti@2204: void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) { twisti@2204: if (!TraceMethodHandles) return; twisti@2204: BLOCK_COMMENT("trace_method_handle {"); twisti@2204: // save: Gargs, O5_savedSP bdelsart@3451: __ save_frame(16); // need space for saving required FPU state bdelsart@3451: twisti@2204: __ set((intptr_t) adaptername, O0); twisti@2204: __ mov(G3_method_handle, O1); never@2868: __ mov(I5_savedSP, O2); bdelsart@3451: __ mov(Gargs, O3); bdelsart@3451: __ mov(I6, O4); // frame identifier for safe stack walking bdelsart@3451: bdelsart@3451: // Save scratched registers that might be needed. Robustness is more bdelsart@3451: // important than optimizing the saves for this debug only code. bdelsart@3451: bdelsart@3451: // save FP result, valid at some call sites (adapter_opt_return_float, ...) bdelsart@3451: Address d_save(FP, -sizeof(jdouble) + STACK_BIAS); bdelsart@3451: __ stf(FloatRegisterImpl::D, Ftos_d, d_save); bdelsart@3451: // Safely save all globals but G2 (handled by call_VM_leaf) and G7 bdelsart@3451: // (OS reserved). twisti@2204: __ mov(G3_method_handle, L3); twisti@2204: __ mov(Gargs, L4); twisti@2204: __ mov(G5_method_type, L5); bdelsart@3451: __ mov(G6, L6); bdelsart@3451: __ mov(G1, L1); bdelsart@3451: bdelsart@3451: __ call_VM_leaf(L2 /* for G2 */, CAST_FROM_FN_PTR(address, trace_method_handle_stub)); twisti@2204: twisti@2204: __ mov(L3, G3_method_handle); twisti@2204: __ mov(L4, Gargs); twisti@2204: __ mov(L5, G5_method_type); bdelsart@3451: __ mov(L6, G6); bdelsart@3451: __ mov(L1, G1); bdelsart@3451: __ ldf(FloatRegisterImpl::D, d_save, Ftos_d); bdelsart@3451: twisti@2204: __ restore(); twisti@2204: BLOCK_COMMENT("} trace_method_handle"); twisti@2204: } twisti@1858: #endif // PRODUCT