| /* |
| * 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); |
| __ ldr(Rmethod, Address(Rmethod, NONZERO(java_lang_invoke_ResolvedMethodName::vmtarget_offset_in_bytes()))); |
| |
| 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); |
| __ ldr(Rmethod, vmtarget_method); |
| break; |
| |
| case vmIntrinsics::_linkToStatic: |
| if (VerifyMethodHandles) { |
| verify_ref_kind(_masm, JVM_REF_invokeStatic, member_reg, temp3); |
| } |
| __ load_heap_oop(Rmethod, member_vmtarget); |
| __ ldr(Rmethod, vmtarget_method); |
| 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; |
| __ ldr(temp2_index, member_vmindex); |
| |
| 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; |
| __ ldr(rbx_index, member_vmindex); |
| 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 |
| Label L_no_such_interface; |
| __ 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 |
