/* * Copyright (c) 2008, 2018, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ // This file mirror as much as possible methodHandles_x86.cpp to ease // cross platform development for JSR292. // Last synchronization: changeset f8c9417e3571 #include "precompiled.hpp" #include "jvm.h" #include "classfile/javaClasses.inline.hpp" #include "interpreter/interpreter.hpp" #include "interpreter/interpreterRuntime.hpp" #include "memory/allocation.inline.hpp" #include "memory/resourceArea.hpp" #include "prims/methodHandles.hpp" #include "runtime/frame.inline.hpp" #include "utilities/preserveException.hpp" #define __ _masm-> #ifdef PRODUCT #define BLOCK_COMMENT(str) /* nothing */ #else #define BLOCK_COMMENT(str) __ block_comment(str) #endif #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") void MethodHandles::load_klass_from_Class(MacroAssembler* _masm, Register klass_reg, Register temp1, Register temp2) { if (VerifyMethodHandles) { verify_klass(_masm, klass_reg, temp1, temp2, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_Class), "MH argument is a Class"); } __ ldr(klass_reg, Address(klass_reg, java_lang_Class::klass_offset_in_bytes())); } #ifdef ASSERT static int check_nonzero(const char* xname, int x) { assert(x != 0, "%s should be nonzero", xname); return x; } #define NONZERO(x) check_nonzero(#x, x) #else //ASSERT #define NONZERO(x) (x) #endif //ASSERT #ifdef ASSERT void MethodHandles::verify_klass(MacroAssembler* _masm, Register obj, Register temp1, Register temp2, SystemDictionary::WKID klass_id, const char* error_message) { InstanceKlass** klass_addr = SystemDictionary::well_known_klass_addr(klass_id); Klass* klass = SystemDictionary::well_known_klass(klass_id); Label L_ok, L_bad; BLOCK_COMMENT("verify_klass {"); __ verify_oop(obj); __ cbz(obj, L_bad); __ load_klass(temp1, obj); __ lea(temp2, ExternalAddress((address) klass_addr)); __ ldr(temp2, temp2); // the cmpptr on x86 dereferences the AddressLiteral (not lea) __ cmp(temp1, temp2); __ b(L_ok, eq); intptr_t super_check_offset = klass->super_check_offset(); __ ldr(temp1, Address(temp1, super_check_offset)); __ cmp(temp1, temp2); __ b(L_ok, eq); __ bind(L_bad); __ stop(error_message); __ BIND(L_ok); BLOCK_COMMENT("} verify_klass"); } void MethodHandles::verify_ref_kind(MacroAssembler* _masm, int ref_kind, Register member_reg, Register temp) { Label L; BLOCK_COMMENT("verify_ref_kind {"); __ ldr_u32(temp, Address(member_reg, NONZERO(java_lang_invoke_MemberName::flags_offset_in_bytes()))); __ logical_shift_right(temp, temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT); __ andr(temp, temp, (unsigned)java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK); __ cmp(temp, ref_kind); __ b(L, eq); { char* buf = NEW_C_HEAP_ARRAY(char, 100, mtInternal); jio_snprintf(buf, 100, "verify_ref_kind expected %x", ref_kind); if (ref_kind == JVM_REF_invokeVirtual || ref_kind == JVM_REF_invokeSpecial) // could do this for all ref_kinds, but would explode assembly code size trace_method_handle(_masm, buf); __ stop(buf); } BLOCK_COMMENT("} verify_ref_kind"); __ bind(L); } #endif //ASSERT void MethodHandles::jump_from_method_handle(MacroAssembler* _masm, bool for_compiler_entry) { Label L_no_such_method; __ cbz(Rmethod, L_no_such_method); // Note: JVMTI overhead seems small enough compared to invocation // cost and is not worth the complexity or code size overhead of // supporting several variants of each adapter. if (!for_compiler_entry && (JvmtiExport::can_post_interpreter_events())) { // JVMTI events, such as single-stepping, are implemented partly by avoiding running // compiled code in threads for which the event is enabled. Check here for // interp_only_mode if these events CAN be enabled. __ ldr_s32(Rtemp, Address(Rthread, JavaThread::interp_only_mode_offset())); #ifdef AARCH64 Label L; __ cbz(Rtemp, L); __ indirect_jump(Address(Rmethod, Method::interpreter_entry_offset()), Rtemp); __ bind(L); #else __ cmp(Rtemp, 0); __ ldr(PC, Address(Rmethod, Method::interpreter_entry_offset()), ne); #endif // AARCH64 } const ByteSize entry_offset = for_compiler_entry ? Method::from_compiled_offset() : Method::from_interpreted_offset(); __ indirect_jump(Address(Rmethod, entry_offset), Rtemp); __ bind(L_no_such_method); // throw exception __ jump(StubRoutines::throw_AbstractMethodError_entry(), relocInfo::runtime_call_type, Rtemp); } void MethodHandles::jump_to_lambda_form(MacroAssembler* _masm, Register recv, Register tmp, bool for_compiler_entry) { BLOCK_COMMENT("jump_to_lambda_form {"); // This is the initial entry point of a lazy method handle. // After type checking, it picks up the invoker from the LambdaForm. assert_different_registers(recv, tmp, Rmethod); // Load the invoker, as MH -> MH.form -> LF.vmentry __ load_heap_oop(tmp, Address(recv, NONZERO(java_lang_invoke_MethodHandle::form_offset_in_bytes()))); __ verify_oop(tmp); __ load_heap_oop(tmp, Address(tmp, NONZERO(java_lang_invoke_LambdaForm::vmentry_offset_in_bytes()))); __ verify_oop(tmp); __ load_heap_oop(Rmethod, Address(tmp, NONZERO(java_lang_invoke_MemberName::method_offset_in_bytes()))); __ verify_oop(Rmethod); __ access_load_at(T_ADDRESS, IN_HEAP, Address(Rmethod, NONZERO(java_lang_invoke_ResolvedMethodName::vmtarget_offset_in_bytes())), Rmethod, noreg, noreg, noreg); if (VerifyMethodHandles && !for_compiler_entry) { // make sure recv is already on stack __ ldr(tmp, Address(Rmethod, Method::const_offset())); __ load_sized_value(tmp, Address(tmp, ConstMethod::size_of_parameters_offset()), sizeof(u2), /*is_signed*/ false); // assert(sizeof(u2) == sizeof(Method::_size_of_parameters), ""); Label L; __ ldr(tmp, __ receiver_argument_address(Rparams, tmp, tmp)); __ cmp(tmp, recv); __ b(L, eq); __ stop("receiver not on stack"); __ bind(L); } jump_from_method_handle(_masm, for_compiler_entry); BLOCK_COMMENT("} jump_to_lambda_form"); } // Code generation address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm, vmIntrinsics::ID iid) { const bool not_for_compiler_entry = false; // this is the interpreter entry assert(is_signature_polymorphic(iid), "expected invoke iid"); if (iid == vmIntrinsics::_invokeGeneric || iid == vmIntrinsics::_compiledLambdaForm) { // Perhaps surprisingly, the user-visible names, and linkToCallSite, are not directly used. // They are linked to Java-generated adapters via MethodHandleNatives.linkMethod. // They all require an extra argument. __ should_not_reach_here(); // empty stubs make SG sick return NULL; } // Rmethod: Method* // Rparams (SP on 32-bit ARM): pointer to parameters // Rsender_sp (R4/R19): sender SP (must preserve; see prepare_to_jump_from_interpreted) // R5_mh: receiver method handle (must load from sp[MethodTypeForm.vmslots]) // R1, R2, Rtemp: garbage temp, blown away // Use same name as x86 to ease future merges Register rdx_temp = R2_tmp; Register rdx_param_size = rdx_temp; // size of parameters Register rax_temp = R1_tmp; Register rcx_mh = R5_mh; // MH receiver; dies quickly and is recycled Register rbx_method = Rmethod; // eventual target of this invocation Register rdi_temp = Rtemp; // here's where control starts out: __ align(CodeEntryAlignment); address entry_point = __ pc(); if (VerifyMethodHandles) { Label L; BLOCK_COMMENT("verify_intrinsic_id {"); __ ldrh(rdi_temp, Address(rbx_method, Method::intrinsic_id_offset_in_bytes())); __ sub_slow(rdi_temp, rdi_temp, (int) iid); __ cbz(rdi_temp, L); if (iid == vmIntrinsics::_linkToVirtual || iid == vmIntrinsics::_linkToSpecial) { // could do this for all kinds, but would explode assembly code size trace_method_handle(_masm, "bad Method*::intrinsic_id"); } __ stop("bad Method*::intrinsic_id"); __ bind(L); BLOCK_COMMENT("} verify_intrinsic_id"); } // First task: Find out how big the argument list is. Address rdx_first_arg_addr; int ref_kind = signature_polymorphic_intrinsic_ref_kind(iid); assert(ref_kind != 0 || iid == vmIntrinsics::_invokeBasic, "must be _invokeBasic or a linkTo intrinsic"); if (ref_kind == 0 || MethodHandles::ref_kind_has_receiver(ref_kind)) { __ ldr(rdx_param_size, Address(rbx_method, Method::const_offset())); __ load_sized_value(rdx_param_size, Address(rdx_param_size, ConstMethod::size_of_parameters_offset()), sizeof(u2), /*is_signed*/ false); // assert(sizeof(u2) == sizeof(Method::_size_of_parameters), ""); rdx_first_arg_addr = __ receiver_argument_address(Rparams, rdx_param_size, rdi_temp); } else { DEBUG_ONLY(rdx_param_size = noreg); } if (!is_signature_polymorphic_static(iid)) { __ ldr(rcx_mh, rdx_first_arg_addr); DEBUG_ONLY(rdx_param_size = noreg); } // rdx_first_arg_addr is live! trace_method_handle_interpreter_entry(_masm, iid); if (iid == vmIntrinsics::_invokeBasic) { generate_method_handle_dispatch(_masm, iid, rcx_mh, noreg, not_for_compiler_entry); } else { // Adjust argument list by popping the trailing MemberName argument. Register rcx_recv = noreg; if (MethodHandles::ref_kind_has_receiver(ref_kind)) { // Load the receiver (not the MH; the actual MemberName's receiver) up from the interpreter stack. __ ldr(rcx_recv = rcx_mh, rdx_first_arg_addr); DEBUG_ONLY(rdx_param_size = noreg); } Register rbx_member = rbx_method; // MemberName ptr; incoming method ptr is dead now #ifdef AARCH64 __ ldr(rbx_member, Address(Rparams, Interpreter::stackElementSize, post_indexed)); #else __ pop(rbx_member); #endif generate_method_handle_dispatch(_masm, iid, rcx_recv, rbx_member, not_for_compiler_entry); } return entry_point; } void MethodHandles::generate_method_handle_dispatch(MacroAssembler* _masm, vmIntrinsics::ID iid, Register receiver_reg, Register member_reg, bool for_compiler_entry) { assert(is_signature_polymorphic(iid), "expected invoke iid"); // Use same name as x86 to ease future merges Register rbx_method = Rmethod; // eventual target of this invocation // temps used in this code are not used in *either* compiled or interpreted calling sequences Register temp1 = (for_compiler_entry ? saved_last_sp_register() : R1_tmp); Register temp2 = AARCH64_ONLY(R9) NOT_AARCH64(R8); Register temp3 = Rtemp; // R12/R16 Register temp4 = AARCH64_ONLY(Rtemp2) NOT_AARCH64(R5); if (for_compiler_entry) { assert(receiver_reg == (iid == vmIntrinsics::_linkToStatic ? noreg : j_rarg0), "only valid assignment"); #ifdef AARCH64 assert_different_registers(temp1, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5, j_rarg6, j_rarg7); assert_different_registers(temp2, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5, j_rarg6, j_rarg7); assert_different_registers(temp3, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5, j_rarg6, j_rarg7); assert_different_registers(temp4, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5, j_rarg6, j_rarg7); #else assert_different_registers(temp1, j_rarg0, j_rarg1, j_rarg2, j_rarg3); assert_different_registers(temp2, j_rarg0, j_rarg1, j_rarg2, j_rarg3); assert_different_registers(temp3, j_rarg0, j_rarg1, j_rarg2, j_rarg3); assert_different_registers(temp4, j_rarg0, j_rarg1, j_rarg2, j_rarg3); #endif // AARCH64 } assert_different_registers(temp1, temp2, temp3, receiver_reg); assert_different_registers(temp1, temp2, temp3, temp4, member_reg); if (!for_compiler_entry) assert_different_registers(temp1, temp2, temp3, temp4, saved_last_sp_register()); // don't trash lastSP if (iid == vmIntrinsics::_invokeBasic) { // indirect through MH.form.exactInvoker.vmtarget jump_to_lambda_form(_masm, receiver_reg, temp3, for_compiler_entry); } else { // The method is a member invoker used by direct method handles. if (VerifyMethodHandles) { // make sure the trailing argument really is a MemberName (caller responsibility) verify_klass(_masm, member_reg, temp2, temp3, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_invoke_MemberName), "MemberName required for invokeVirtual etc."); } Address member_clazz( member_reg, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes())); Address member_vmindex( member_reg, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes())); Address member_vmtarget(member_reg, NONZERO(java_lang_invoke_MemberName::method_offset_in_bytes())); Address vmtarget_method(Rmethod, NONZERO(java_lang_invoke_ResolvedMethodName::vmtarget_offset_in_bytes())); Register temp1_recv_klass = temp1; if (iid != vmIntrinsics::_linkToStatic) { if (iid == vmIntrinsics::_linkToSpecial) { // Don't actually load the klass; just null-check the receiver. __ null_check(receiver_reg, temp3); } else { // load receiver klass itself __ null_check(receiver_reg, temp3, oopDesc::klass_offset_in_bytes()); __ load_klass(temp1_recv_klass, receiver_reg); __ verify_klass_ptr(temp1_recv_klass); } BLOCK_COMMENT("check_receiver {"); // The receiver for the MemberName must be in receiver_reg. // Check the receiver against the MemberName.clazz if (VerifyMethodHandles && iid == vmIntrinsics::_linkToSpecial) { // Did not load it above... __ load_klass(temp1_recv_klass, receiver_reg); __ verify_klass_ptr(temp1_recv_klass); } // Check the receiver against the MemberName.clazz if (VerifyMethodHandles && iid != vmIntrinsics::_linkToInterface) { Label L_ok; Register temp2_defc = temp2; __ load_heap_oop(temp2_defc, member_clazz); load_klass_from_Class(_masm, temp2_defc, temp3, temp4); __ verify_klass_ptr(temp2_defc); #ifdef AARCH64 // TODO-AARCH64 __ b(L_ok); #else __ check_klass_subtype(temp1_recv_klass, temp2_defc, temp3, temp4, noreg, L_ok); #endif // If we get here, the type check failed! __ stop("receiver class disagrees with MemberName.clazz"); __ bind(L_ok); } BLOCK_COMMENT("} check_receiver"); } if (iid == vmIntrinsics::_linkToSpecial || iid == vmIntrinsics::_linkToStatic) { DEBUG_ONLY(temp1_recv_klass = noreg); // these guys didn't load the recv_klass } // Live registers at this point: // member_reg - MemberName that was the extra argument // temp1_recv_klass - klass of stacked receiver, if needed Label L_incompatible_class_change_error; switch (iid) { case vmIntrinsics::_linkToSpecial: if (VerifyMethodHandles) { verify_ref_kind(_masm, JVM_REF_invokeSpecial, member_reg, temp3); } __ load_heap_oop(Rmethod, member_vmtarget); __ access_load_at(T_ADDRESS, IN_HEAP, vmtarget_method, Rmethod, noreg, noreg, noreg); break; case vmIntrinsics::_linkToStatic: if (VerifyMethodHandles) { verify_ref_kind(_masm, JVM_REF_invokeStatic, member_reg, temp3); } __ load_heap_oop(Rmethod, member_vmtarget); __ access_load_at(T_ADDRESS, IN_HEAP, vmtarget_method, Rmethod, noreg, noreg, noreg); break; break; case vmIntrinsics::_linkToVirtual: { // same as TemplateTable::invokevirtual, // minus the CP setup and profiling: if (VerifyMethodHandles) { verify_ref_kind(_masm, JVM_REF_invokeVirtual, member_reg, temp3); } // pick out the vtable index from the MemberName, and then we can discard it: Register temp2_index = temp2; __ access_load_at(T_ADDRESS, IN_HEAP, member_vmindex, temp2_index, noreg, noreg, noreg); if (VerifyMethodHandles) { Label L_index_ok; __ cmp(temp2_index, 0); __ b(L_index_ok, ge); __ 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, Rmethod); 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, temp2, temp4); __ verify_klass_ptr(temp3_intf); Register rbx_index = rbx_method; __ access_load_at(T_ADDRESS, IN_HEAP, member_vmindex, rbx_index, noreg, noreg, noreg); if (VerifyMethodHandles) { Label L; __ cmp(rbx_index, 0); __ b(L, ge); __ 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, temp4, L_incompatible_class_change_error); break; } default: fatal("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid)); break; } // Live at this point: // Rmethod (target method) // Rsender_sp, Rparams (if interpreted) // register arguments (if compiled) // After figuring out which concrete method to call, jump into it. __ verify_method_ptr(Rmethod); jump_from_method_handle(_masm, for_compiler_entry); if (iid == vmIntrinsics::_linkToInterface) { __ bind(L_incompatible_class_change_error); __ jump(StubRoutines::throw_IncompatibleClassChangeError_entry(), relocInfo::runtime_call_type, Rtemp); } } } #ifndef PRODUCT enum { ARG_LIMIT = 255, SLOP = 4, // use this parameter for checking for garbage stack movements: UNREASONABLE_STACK_MOVE = (ARG_LIMIT + SLOP) // the slop defends against false alarms due to fencepost errors }; #ifdef AARCH64 const int trace_mh_nregs = 32; // R0-R30, PC #else const int trace_mh_nregs = 15; const Register trace_mh_regs[trace_mh_nregs] = {R0, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, LR, PC}; #endif // AARCH64 void trace_method_handle_stub(const char* adaptername, intptr_t* saved_regs, intptr_t* saved_bp, oop mh) { // 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 intptr_t* entry_sp = (intptr_t*) &saved_regs[trace_mh_nregs]; // just after the saved regs intptr_t* saved_sp = (intptr_t*) saved_regs[Rsender_sp->encoding()]; // save of Rsender_sp intptr_t* last_sp = (intptr_t*) saved_bp[AARCH64_ONLY(frame::interpreter_frame_stack_top_offset) NOT_AARCH64(frame::interpreter_frame_last_sp_offset)]; intptr_t* base_sp = last_sp; intptr_t mh_reg = (intptr_t)saved_regs[R5_mh->encoding()]; const char* mh_reg_name = "R5_mh"; if (!has_mh) mh_reg_name = "R5"; tty->print_cr("MH %s %s=" PTR_FORMAT " sp=(" PTR_FORMAT "+" INTX_FORMAT ") stack_size=" INTX_FORMAT " bp=" PTR_FORMAT, adaptername, mh_reg_name, mh_reg, (intptr_t)entry_sp, (intptr_t)saved_sp - (intptr_t)entry_sp, (intptr_t)(base_sp - last_sp), (intptr_t)saved_bp); if (last_sp != saved_sp && last_sp != NULL) tty->print_cr("*** last_sp=" INTPTR_FORMAT, p2i(last_sp)); if (Verbose) { tty->print(" reg dump: "); int i; for (i = 0; i < trace_mh_nregs; i++) { if (i > 0 && i % AARCH64_ONLY(2) NOT_AARCH64(4) == 0) tty->print("\n + dump: "); #ifdef AARCH64 const char* reg_name = (i == trace_mh_nregs-1) ? "pc" : as_Register(i)->name(); #else const char* reg_name = trace_mh_regs[i]->name(); #endif tty->print(" %s: " INTPTR_FORMAT, reg_name, p2i((void *)saved_regs[i])); } tty->cr(); } if (Verbose) { // dump last frame (from JavaThread::print_frame_layout) // Note: code is robust but the dumped informationm may not be // 100% correct, particularly with respect to the dumped // "unextended_sp". Getting it right for all trace_method_handle // call paths is not worth the complexity/risk. The correct slot // will be identified by *Rsender_sp anyway in the dump. JavaThread* p = JavaThread::active(); ResourceMark rm; PRESERVE_EXCEPTION_MARK; FrameValues values; intptr_t* dump_fp = (intptr_t *) saved_bp; address dump_pc = (address) saved_regs[trace_mh_nregs-2]; // LR (with LR,PC last in saved_regs) frame dump_frame((intptr_t *)entry_sp, dump_fp, dump_pc); dump_frame.describe(values, 1); // mark Rsender_sp if seems valid if (has_mh) { if ((saved_sp >= entry_sp - UNREASONABLE_STACK_MOVE) && (saved_sp < dump_fp)) { values.describe(-1, saved_sp, "*Rsender_sp"); } } // Note: the unextended_sp may not be correct tty->print_cr(" stack layout:"); values.print(p); } if (Verbose) { 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(); } } } } void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) { if (!TraceMethodHandles) return; BLOCK_COMMENT("trace_method_handle {"); // register saving // must correspond to trace_mh_nregs and trace_mh_regs defined above int push_size = __ save_all_registers(); assert(trace_mh_nregs*wordSize == push_size,"saved register count mismatch"); __ mov_slow(R0, adaptername); __ mov(R1, SP); // entry_sp (after pushes) __ mov(R2, FP); if (R5_mh != R3) { assert_different_registers(R0, R1, R2, R5_mh); __ mov(R3, R5_mh); } __ call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub), R0, R1, R2, R3); __ restore_all_registers(); BLOCK_COMMENT("} trace_method_handle"); } #endif //PRODUCT