--- old/src/hotspot/cpu/sparc/methodHandles_sparc.cpp 2020-05-01 02:29:10.799790353 -0700 +++ /dev/null 2020-03-09 18:57:19.455001459 -0700 @@ -1,617 +0,0 @@ -/* - * Copyright (c) 2008, 2020, 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. - * - */ - -#include "precompiled.hpp" -#include "jvm.h" -#include "asm/macroAssembler.inline.hpp" -#include "classfile/javaClasses.inline.hpp" -#include "interpreter/interpreter.hpp" -#include "interpreter/interp_masm.hpp" -#include "logging/log.hpp" -#include "memory/allocation.inline.hpp" -#include "memory/resourceArea.hpp" -#include "prims/methodHandles.hpp" -#include "runtime/flags/flagSetting.hpp" -#include "runtime/frame.inline.hpp" -#include "utilities/preserveException.hpp" - -#define __ _masm-> - -#ifdef PRODUCT -#define BLOCK_COMMENT(str) /* nothing */ -#define STOP(error) stop(error) -#else -#define BLOCK_COMMENT(str) __ block_comment(str) -#define STOP(error) block_comment(error); __ stop(error) -#endif - -#define BIND(label) bind(label); BLOCK_COMMENT(#label ":") - -// Workaround for C++ overloading nastiness on '0' for RegisterOrConstant. -static RegisterOrConstant constant(int value) { - return RegisterOrConstant(value); -} - -void MethodHandles::load_klass_from_Class(MacroAssembler* _masm, Register klass_reg, Register temp_reg, Register temp2_reg) { - if (VerifyMethodHandles) - verify_klass(_masm, klass_reg, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_Class), temp_reg, temp2_reg, - "MH argument is a Class"); - __ ld_ptr(Address(klass_reg, java_lang_Class::klass_offset_in_bytes()), klass_reg); -} - -#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_reg, SystemDictionary::WKID klass_id, - Register temp_reg, Register temp2_reg, - const char* error_message) { - InstanceKlass** klass_addr = SystemDictionary::well_known_klass_addr(klass_id); - Klass* klass = SystemDictionary::well_known_klass(klass_id); - bool did_save = false; - if (temp_reg == noreg || temp2_reg == noreg) { - temp_reg = L1; - temp2_reg = L2; - __ save_frame_and_mov(0, obj_reg, L0); - obj_reg = L0; - did_save = true; - } - Label L_ok, L_bad; - BLOCK_COMMENT("verify_klass {"); - __ verify_oop(obj_reg); - __ br_null_short(obj_reg, Assembler::pn, L_bad); - __ load_klass(obj_reg, temp_reg); - __ set(ExternalAddress((Metadata**)klass_addr), temp2_reg); - __ ld_ptr(Address(temp2_reg, 0), temp2_reg); - __ cmp_and_brx_short(temp_reg, temp2_reg, Assembler::equal, Assembler::pt, L_ok); - intptr_t super_check_offset = klass->super_check_offset(); - __ ld_ptr(Address(temp_reg, super_check_offset), temp_reg); - __ set(ExternalAddress((Metadata**)klass_addr), temp2_reg); - __ ld_ptr(Address(temp2_reg, 0), temp2_reg); - __ cmp_and_brx_short(temp_reg, temp2_reg, Assembler::equal, Assembler::pt, L_ok); - __ BIND(L_bad); - if (did_save) __ restore(); - __ STOP(error_message); - __ BIND(L_ok); - if (did_save) __ restore(); - 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 {"); - __ lduw(Address(member_reg, NONZERO(java_lang_invoke_MemberName::flags_offset_in_bytes())), temp); - __ srl( temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT, temp); - __ and3(temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK, temp); - __ cmp_and_br_short(temp, ref_kind, Assembler::equal, Assembler::pt, L); - { 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, Register method, Register target, Register temp, - bool for_compiler_entry) { - Label L_no_such_method; - assert(method == G5_method, "interpreter calling convention"); - assert_different_registers(method, target, temp); - - if (!for_compiler_entry && JvmtiExport::can_post_interpreter_events()) { - Label run_compiled_code; - // 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. - __ verify_thread(); - const Address interp_only(G2_thread, JavaThread::interp_only_mode_offset()); - __ ld(interp_only, temp); - __ cmp_and_br_short(temp, 0, Assembler::zero, Assembler::pt, run_compiled_code); - // Null method test is replicated below in compiled case, - // it might be able to address across the verify_thread() - __ br_null_short(G5_method, Assembler::pn, L_no_such_method); - __ ld_ptr(G5_method, in_bytes(Method::interpreter_entry_offset()), target); - __ jmp(target, 0); - __ delayed()->nop(); - __ BIND(run_compiled_code); - // Note: we could fill some delay slots here, but - // it doesn't matter, since this is interpreter code. - } - - // Compiled case, either static or fall-through from runtime conditional - __ br_null_short(G5_method, Assembler::pn, L_no_such_method); - - const ByteSize entry_offset = for_compiler_entry ? Method::from_compiled_offset() : - Method::from_interpreted_offset(); - __ ld_ptr(G5_method, in_bytes(entry_offset), target); - __ jmp(target, 0); - __ delayed()->nop(); - - __ bind(L_no_such_method); - AddressLiteral ame(StubRoutines::throw_AbstractMethodError_entry()); - __ jump_to(ame, temp); - __ delayed()->nop(); -} - -void MethodHandles::jump_to_lambda_form(MacroAssembler* _masm, - Register recv, Register method_temp, - Register temp2, Register temp3, - 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, method_temp, temp2); // temp3 is only passed on - assert(method_temp == G5_method, "required register for loading method"); - - //NOT_PRODUCT({ FlagSetting fs(TraceMethodHandles, true); trace_method_handle(_masm, "LZMH"); }); - - // Load the invoker, as MH -> MH.form -> LF.vmentry - __ verify_oop(recv); - __ load_heap_oop(recv, NONZERO(java_lang_invoke_MethodHandle::form_offset_in_bytes()), method_temp, temp2); - __ verify_oop(method_temp); - __ load_heap_oop(method_temp, NONZERO(java_lang_invoke_LambdaForm::vmentry_offset_in_bytes()), method_temp, temp2); - __ verify_oop(method_temp); - __ load_heap_oop(method_temp, NONZERO(java_lang_invoke_MemberName::method_offset_in_bytes()), method_temp, temp2); - __ verify_oop(method_temp); - __ ld_ptr(Address(method_temp, NONZERO(java_lang_invoke_ResolvedMethodName::vmtarget_offset_in_bytes())), method_temp); - - if (VerifyMethodHandles && !for_compiler_entry) { - // make sure recv is already on stack - __ ld_ptr(method_temp, in_bytes(Method::const_offset()), temp2); - __ load_sized_value(Address(temp2, ConstMethod::size_of_parameters_offset()), - temp2, - sizeof(u2), /*is_signed*/ false); - // assert(sizeof(u2) == sizeof(Method::_size_of_parameters), ""); - Label L; - __ ld_ptr(__ argument_address(temp2, temp2, -1), temp2); - __ cmp_and_br_short(temp2, recv, Assembler::equal, Assembler::pt, L); - __ STOP("receiver not on stack"); - __ BIND(L); - } - - jump_from_method_handle(_masm, method_temp, temp2, temp3, 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 symbolic references visible to Java are not directly used. - // They are linked to Java-generated adapters via MethodHandleNatives.linkMethod. - // They all allow an appendix argument. - __ should_not_reach_here(); // empty stubs make SG sick - return NULL; - } - - // I5_savedSP/O5_savedSP: sender SP (must preserve; see prepare_to_jump_from_interpreted) - // G5_method: Method* - // G4 (Gargs): incoming argument list (must preserve) - // O0: used as temp to hold mh or receiver - // O1, O4: garbage temps, blown away - Register O1_scratch = O1; - Register O4_param_size = O4; // size of parameters - - // here's where control starts out: - __ align(CodeEntryAlignment); - address entry_point = __ pc(); - - if (VerifyMethodHandles) { - assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2"); - - Label L; - BLOCK_COMMENT("verify_intrinsic_id {"); - __ lduh(Address(G5_method, Method::intrinsic_id_offset_in_bytes()), O1_scratch); - __ cmp_and_br_short(O1_scratch, (int) iid, Assembler::equal, Assembler::pt, 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 O4_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)) { - __ ld_ptr(G5_method, in_bytes(Method::const_offset()), O4_param_size); - __ load_sized_value(Address(O4_param_size, ConstMethod::size_of_parameters_offset()), - O4_param_size, - sizeof(u2), /*is_signed*/ false); - // assert(sizeof(u2) == sizeof(Method::_size_of_parameters), ""); - O4_first_arg_addr = __ argument_address(O4_param_size, O4_param_size, -1); - } else { - DEBUG_ONLY(O4_param_size = noreg); - } - - Register O0_mh = noreg; - if (!is_signature_polymorphic_static(iid)) { - __ ld_ptr(O4_first_arg_addr, O0_mh = O0); - DEBUG_ONLY(O4_param_size = noreg); - } - - // O4_first_arg_addr is live! - - if (log_is_enabled(Info, methodhandles)) { - if (O0_mh != noreg) - __ mov(O0_mh, G3_method_handle); // make stub happy - trace_method_handle_interpreter_entry(_masm, iid); - } - - if (iid == vmIntrinsics::_invokeBasic) { - generate_method_handle_dispatch(_masm, iid, O0_mh, noreg, not_for_compiler_entry); - - } else { - // Adjust argument list by popping the trailing MemberName argument. - Register O0_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. - __ ld_ptr(O4_first_arg_addr, O0_recv = O0); - DEBUG_ONLY(O4_param_size = noreg); - } - Register G5_member = G5_method; // MemberName ptr; incoming method ptr is dead now - __ ld_ptr(__ argument_address(constant(0)), G5_member); - __ add(Gargs, Interpreter::stackElementSize, Gargs); - generate_method_handle_dispatch(_masm, iid, O0_recv, G5_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"); - Register temp1 = (for_compiler_entry ? G1_scratch : O1); - Register temp2 = (for_compiler_entry ? G3_scratch : O2); - Register temp3 = (for_compiler_entry ? G4_scratch : O3); - Register temp4 = (for_compiler_entry ? noreg : O4); - if (for_compiler_entry) { - assert(receiver_reg == (iid == vmIntrinsics::_linkToStatic ? noreg : O0), "only valid assignment"); - assert_different_registers(temp1, O0, O1, O2, O3, O4, O5); - assert_different_registers(temp2, O0, O1, O2, O3, O4, O5); - assert_different_registers(temp3, O0, O1, O2, O3, O4, O5); - assert_different_registers(temp4, O0, O1, O2, O3, O4, O5); - } else { - assert_different_registers(temp1, temp2, temp3, temp4, O5_savedSP); // don't trash lastSP - } - if (receiver_reg != noreg) assert_different_registers(temp1, temp2, temp3, temp4, receiver_reg); - if (member_reg != noreg) assert_different_registers(temp1, temp2, temp3, temp4, member_reg); - - if (iid == vmIntrinsics::_invokeBasic) { - // indirect through MH.form.vmentry.vmtarget - jump_to_lambda_form(_masm, receiver_reg, G5_method, temp1, temp2, 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, SystemDictionary::WK_KLASS_ENUM_NAME(MemberName_klass), - temp1, temp2, - "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( G5_method, NONZERO(java_lang_invoke_ResolvedMethodName::vmtarget_offset_in_bytes())); - - Register temp1_recv_klass = temp1; - if (iid != vmIntrinsics::_linkToStatic) { - __ verify_oop(receiver_reg); - if (iid == vmIntrinsics::_linkToSpecial) { - // Don't actually load the klass; just null-check the receiver. - __ null_check(receiver_reg); - } else { - // load receiver klass itself - __ null_check(receiver_reg, oopDesc::klass_offset_in_bytes()); - __ load_klass(receiver_reg, temp1_recv_klass); - __ 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(receiver_reg, temp1_recv_klass); - __ verify_klass_ptr(temp1_recv_klass); - } - if (VerifyMethodHandles && iid != vmIntrinsics::_linkToInterface) { - Label L_ok; - Register temp2_defc = temp2; - __ load_heap_oop(member_clazz, temp2_defc, temp3); - load_klass_from_Class(_masm, temp2_defc, temp3, temp4); - __ verify_klass_ptr(temp2_defc); - __ check_klass_subtype(temp1_recv_klass, temp2_defc, temp3, temp4, L_ok); - // 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 trailing argument - // temp1_recv_klass - klass of stacked receiver, if needed - // O5_savedSP - interpreter linkage (if interpreted) - // O0..O5 - compiler arguments (if compiled) - - Label L_incompatible_class_change_error; - switch (iid) { - case vmIntrinsics::_linkToSpecial: - if (VerifyMethodHandles) { - verify_ref_kind(_masm, JVM_REF_invokeSpecial, member_reg, temp2); - } - __ load_heap_oop(member_vmtarget, G5_method, temp3); - __ ld_ptr(vmtarget_method, G5_method); - break; - - case vmIntrinsics::_linkToStatic: - if (VerifyMethodHandles) { - verify_ref_kind(_masm, JVM_REF_invokeStatic, member_reg, temp2); - } - __ load_heap_oop(member_vmtarget, G5_method, temp3); - __ ld_ptr(vmtarget_method, G5_method); - 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, temp2); - } - - // pick out the vtable index from the MemberName, and then we can discard it: - Register temp2_index = temp2; - __ ld_ptr(member_vmindex, temp2_index); - - if (VerifyMethodHandles) { - Label L_index_ok; - __ cmp_and_br_short(temp2_index, (int) 0, Assembler::greaterEqual, Assembler::pn, L_index_ok); - __ 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, G5_method); - 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, temp2); - } - - Register temp2_intf = temp2; - __ load_heap_oop(member_clazz, temp2_intf, temp3); - load_klass_from_Class(_masm, temp2_intf, temp3, temp4); - __ verify_klass_ptr(temp2_intf); - - Register G5_index = G5_method; - __ ld_ptr(member_vmindex, G5_index); - if (VerifyMethodHandles) { - Label L; - __ cmp_and_br_short(G5_index, 0, Assembler::greaterEqual, Assembler::pt, L); - __ 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, temp2_intf, - // note: next two args must be the same: - G5_index, G5_method, - temp3, temp4, - L_incompatible_class_change_error); - break; - } - - default: - fatal("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid)); - break; - } - - // Live at this point: - // G5_method - // O5_savedSP (if interpreted) - - // After figuring out which concrete method to call, jump into it. - // Note that this works in the interpreter with no data motion. - // But the compiled version will require that rcx_recv be shifted out. - __ verify_method_ptr(G5_method); - jump_from_method_handle(_masm, G5_method, temp1, temp2, for_compiler_entry); - - if (iid == vmIntrinsics::_linkToInterface) { - __ BIND(L_incompatible_class_change_error); - AddressLiteral icce(StubRoutines::throw_IncompatibleClassChangeError_entry()); - __ jump_to(icce, temp1); - __ delayed()->nop(); - } - } -} - -#ifndef PRODUCT -void trace_method_handle_stub(const char* adaptername, - oopDesc* mh, - intptr_t* saved_sp, - intptr_t* args, - intptr_t* tracing_fp) { - bool has_mh = (strstr(adaptername, "/static") == NULL && - strstr(adaptername, "linkTo") == NULL); // static linkers don't have MH - const char* mh_reg_name = has_mh ? "G3_mh" : "G3"; - tty->print_cr("MH %s %s=" INTPTR_FORMAT " saved_sp=" INTPTR_FORMAT " args=" INTPTR_FORMAT, - adaptername, mh_reg_name, - p2i(mh), p2i(saved_sp), p2i(args)); - - if (Verbose) { - // dumping last frame with frame::describe - - JavaThread* p = JavaThread::active(); - - ResourceMark rm; - PRESERVE_EXCEPTION_MARK; // may not be needed by safer and unexpensive here - FrameValues values; - - // Note: We want to allow trace_method_handle from any call site. - // While trace_method_handle creates a frame, it may be entered - // without a valid return PC in O7 (e.g. not just after a call). - // Walking that frame could lead to failures due to that invalid PC. - // => carefully detect that frame when doing the stack walking - - // walk up to the right frame using the "tracing_fp" argument - intptr_t* cur_sp = StubRoutines::Sparc::flush_callers_register_windows_func()(); - frame cur_frame(cur_sp, frame::unpatchable, NULL); - - while (cur_frame.fp() != (intptr_t *)(STACK_BIAS+(uintptr_t)tracing_fp)) { - cur_frame = os::get_sender_for_C_frame(&cur_frame); - } - - // safely create a frame and call frame::describe - intptr_t *dump_sp = cur_frame.sender_sp(); - intptr_t *dump_fp = cur_frame.link(); - - bool walkable = has_mh; // whether the traced frame shoud be walkable - - // the sender for cur_frame is the caller of trace_method_handle - if (walkable) { - // The previous definition of walkable may have to be refined - // if new call sites cause the next frame constructor to start - // failing. Alternatively, frame constructors could be - // modified to support the current or future non walkable - // frames (but this is more intrusive and is not considered as - // part of this RFE, which will instead use a simpler output). - frame dump_frame = frame(dump_sp, - cur_frame.sp(), // younger_sp - false); // no adaptation - dump_frame.describe(values, 1); - } else { - // Robust dump for frames which cannot be constructed from sp/younger_sp - // Add descriptions without building a Java frame to avoid issues - values.describe(-1, dump_fp, "fp for #1 "); - values.describe(-1, dump_sp, "sp"); - } - - bool has_args = has_mh; // whether Gargs is meaningful - - // mark args, if seems valid (may not be valid for some adapters) - if (has_args) { - if ((args >= dump_sp) && (args < dump_fp)) { - values.describe(-1, args, "*G4_args"); - } - } - - // mark saved_sp, if seems valid (may not be valid for some adapters) - intptr_t *unbiased_sp = (intptr_t *)(STACK_BIAS+(uintptr_t)saved_sp); - const int ARG_LIMIT = 255, SLOP = 45, UNREASONABLE_STACK_MOVE = (ARG_LIMIT + SLOP); - if ((unbiased_sp >= dump_sp - UNREASONABLE_STACK_MOVE) && (unbiased_sp < dump_fp)) { - values.describe(-1, unbiased_sp, "*saved_sp+STACK_BIAS"); - } - - // Note: the unextended_sp may not be correct - tty->print_cr(" stack layout:"); - values.print(p); - 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 (!log_is_enabled(Info, methodhandles)) return; - BLOCK_COMMENT("trace_method_handle {"); - // save: Gargs, O5_savedSP - __ save_frame(16); // need space for saving required FPU state - - __ set((intptr_t) adaptername, O0); - __ mov(G3_method_handle, O1); - __ mov(I5_savedSP, O2); - __ mov(Gargs, O3); - __ mov(I6, O4); // frame identifier for safe stack walking - - // Save scratched registers that might be needed. Robustness is more - // important than optimizing the saves for this debug only code. - - // save FP result, valid at some call sites (adapter_opt_return_float, ...) - Address d_save(FP, -sizeof(jdouble) + STACK_BIAS); - __ stf(FloatRegisterImpl::D, Ftos_d, d_save); - // Safely save all globals but G2 (handled by call_VM_leaf) and G7 - // (OS reserved). - __ mov(G3_method_handle, L3); - __ mov(Gargs, L4); - __ mov(G5_method_type, L5); - __ mov(G6, L6); - __ mov(G1, L1); - - __ call_VM_leaf(L2 /* for G2 */, CAST_FROM_FN_PTR(address, trace_method_handle_stub)); - - __ mov(L3, G3_method_handle); - __ mov(L4, Gargs); - __ mov(L5, G5_method_type); - __ mov(L6, G6); - __ mov(L1, G1); - __ ldf(FloatRegisterImpl::D, d_save, Ftos_d); - - __ restore(); - BLOCK_COMMENT("} trace_method_handle"); -} -#endif // PRODUCT