jdk8-mips64-public/hotspot: src/cpu/ppc/vm/methodHandles

src/cpu/ppc/vm/methodHandles_ppc.cpp@710a3c8b516e (annotated)

src/cpu/ppc/vm/methodHandles_ppc.cpp

Tue, 08 Aug 2017 15:57:29 +0800

author: aoqi
date: Tue, 08 Aug 2017 15:57:29 +0800
changeset 6876: 710a3c8b516e
parent 6515: 71a71b0bc844
parent 0: f90c822e73f8
child 7535: 7ae4e26cb1e0
permissions: -rw-r--r--

merge

 /*
  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
  * Copyright 2012, 2014 SAP AG. 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 "asm/macroAssembler.inline.hpp"
 #include "interpreter/interpreter.hpp"
 #include "memory/allocation.inline.hpp"
 #include "prims/methodHandles.hpp"
 #define __ _masm->
 #ifdef CC_INTERP
 #define EXCEPTION_ENTRY StubRoutines::throw_NullPointerException_at_call_entry()
 #else
 #define EXCEPTION_ENTRY Interpreter::throw_NullPointerException_entry()
 #endif
 #ifdef PRODUCT
 #define BLOCK_COMMENT(str) // nothing
 #else
 #define BLOCK_COMMENT(str) __ block_comment(str)
 #endif
 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
 // Workaround for C++ overloading nastiness on '0' for RegisterOrConstant.
 inline 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(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, err_msg("%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) {
   Klass** klass_addr = SystemDictionary::well_known_klass_addr(klass_id);
   KlassHandle klass = SystemDictionary::well_known_klass(klass_id);
   Label L_ok, L_bad;
   BLOCK_COMMENT("verify_klass {");
   __ verify_oop(obj_reg);
   __ cmpdi(CCR0, obj_reg, 0);
   __ beq(CCR0, L_bad);
   __ load_klass(temp_reg, obj_reg);
   __ load_const_optimized(temp2_reg, (address) klass_addr);
   __ ld(temp2_reg, 0, temp2_reg);
   __ cmpd(CCR0, temp_reg, temp2_reg);
   __ beq(CCR0, L_ok);
   __ ld(temp_reg, klass->super_check_offset(), temp_reg);
   __ cmpd(CCR0, temp_reg, temp2_reg);
   __ beq(CCR0, L_ok);
   __ 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 {");
   __ load_sized_value(temp, NONZERO(java_lang_invoke_MemberName::flags_offset_in_bytes()), member_reg,
                       sizeof(u4), /*is_signed*/ false);
   // assert(sizeof(u4) == sizeof(java.lang.invoke.MemberName.flags), "");
   __ srwi( temp, temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT);
   __ andi(temp, temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK);
   __ cmpwi(CCR1, temp, ref_kind);
   __ beq(CCR1, 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 == R19_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();
     __ lwz(temp, in_bytes(JavaThread::interp_only_mode_offset()), R16_thread);
     __ cmplwi(CCR0, temp, 0);
     __ beq(CCR0, run_compiled_code);
     // Null method test is replicated below in compiled case,
     // it might be able to address across the verify_thread()
     __ cmplwi(CCR0, R19_method, 0);
     __ beq(CCR0, L_no_such_method);
     __ ld(target, in_bytes(Method::interpreter_entry_offset()), R19_method);
     __ mtctr(target);
     __ bctr();
     __ BIND(run_compiled_code);
   }
   // Compiled case, either static or fall-through from runtime conditional
   __ cmplwi(CCR0, R19_method, 0);
   __ beq(CCR0, L_no_such_method);
   const ByteSize entry_offset = for_compiler_entry ? Method::from_compiled_offset() :
                                                      Method::from_interpreted_offset();
   __ ld(target, in_bytes(entry_offset), R19_method);
   __ mtctr(target);
   __ bctr();
   __ bind(L_no_such_method);
   assert(StubRoutines::throw_AbstractMethodError_entry() != NULL, "not yet generated!");
   __ load_const_optimized(target, StubRoutines::throw_AbstractMethodError_entry());
   __ mtctr(target);
   __ bctr();
 }
 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 == R19_method, "required register for loading method");
   // Load the invoker, as MH -> MH.form -> LF.vmentry
   __ verify_oop(recv);
   __ load_heap_oop_not_null(method_temp, NONZERO(java_lang_invoke_MethodHandle::form_offset_in_bytes()), recv);
   __ verify_oop(method_temp);
   __ load_heap_oop_not_null(method_temp, NONZERO(java_lang_invoke_LambdaForm::vmentry_offset_in_bytes()), method_temp);
   __ verify_oop(method_temp);
   // the following assumes that a Method* is normally compressed in the vmtarget field:
   __ ld(method_temp, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes()), method_temp);
   if (VerifyMethodHandles && !for_compiler_entry) {
     // make sure recv is already on stack
     __ ld(temp2, in_bytes(Method::const_offset()), method_temp);
     __ load_sized_value(temp2, in_bytes(ConstMethod::size_of_parameters_offset()), temp2,
                         sizeof(u2), /*is_signed*/ false);
     // assert(sizeof(u2) == sizeof(ConstMethod::_size_of_parameters), "");
     Label L;
     __ ld(temp2, __ argument_offset(temp2, temp2, 0), CC_INTERP_ONLY(R17_tos) NOT_CC_INTERP(R15_esp));
     __ cmpd(CCR1, temp2, recv);
     __ beq(CCR1, 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.
     __ stop("Should not reach here");           // empty stubs make SG sick
     return NULL;
   }
   Register argbase    = CC_INTERP_ONLY(R17_tos) NOT_CC_INTERP(R15_esp); // parameter (preserved)
   Register argslot    = R3;
   Register temp1      = R6;
   Register param_size = R7;
   // here's where control starts out:
   __ align(CodeEntryAlignment);
   address entry_point = __ pc();
   if (VerifyMethodHandles) {
     Label L;
     BLOCK_COMMENT("verify_intrinsic_id {");
     __ load_sized_value(temp1, Method::intrinsic_id_offset_in_bytes(), R19_method,
                         sizeof(u1), /*is_signed*/ false);
     // assert(sizeof(u1) == sizeof(Method::_intrinsic_id), "");
     __ cmpwi(CCR1, temp1, (int) iid);
     __ beq(CCR1, 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.
   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(param_size, in_bytes(Method::const_offset()), R19_method);
     __ load_sized_value(param_size, in_bytes(ConstMethod::size_of_parameters_offset()), param_size,
                         sizeof(u2), /*is_signed*/ false);
     // assert(sizeof(u2) == sizeof(ConstMethod::_size_of_parameters), "");
   } else {
     DEBUG_ONLY(param_size = noreg);
   }
   Register tmp_mh = noreg;
   if (!is_signature_polymorphic_static(iid)) {
     __ ld(tmp_mh = temp1, __ argument_offset(param_size, param_size, 0), argbase);
     DEBUG_ONLY(param_size = noreg);
   }
   if (TraceMethodHandles) {
     if (tmp_mh != noreg)
       __ mr(R23_method_handle, tmp_mh);  // make stub happy
     trace_method_handle_interpreter_entry(_masm, iid);
   }
   if (iid == vmIntrinsics::_invokeBasic) {
     generate_method_handle_dispatch(_masm, iid, tmp_mh, noreg, not_for_compiler_entry);
   } else {
     // Adjust argument list by popping the trailing MemberName argument.
     Register tmp_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(tmp_recv = temp1, __ argument_offset(param_size, param_size, 0), argbase);
       DEBUG_ONLY(param_size = noreg);
     }
     Register R19_member = R19_method;  // MemberName ptr; incoming method ptr is dead now
     __ ld(R19_member, RegisterOrConstant((intptr_t)8), argbase);
     __ add(argbase, Interpreter::stackElementSize, argbase);
     generate_method_handle_dispatch(_masm, iid, tmp_recv, R19_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 ? R25_tmp5 : R7);
   Register temp2 = (for_compiler_entry ? R22_tmp2 : R8);
   Register temp3 = (for_compiler_entry ? R23_tmp3 : R9);
   Register temp4 = (for_compiler_entry ? R24_tmp4 : R10);
   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, R19_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.");
     }
     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_throw(receiver_reg, -1, temp1, EXCEPTION_ENTRY);
       } else {
         // load receiver klass itself
         __ null_check_throw(receiver_reg, oopDesc::klass_offset_in_bytes(), temp1, EXCEPTION_ENTRY);
         __ 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);
       }
       if (VerifyMethodHandles && iid != vmIntrinsics::_linkToInterface) {
         Label L_ok;
         Register temp2_defc = temp2;
         __ load_heap_oop_not_null(temp2_defc, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes()), member_reg);
         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);
       }
       __ ld(R19_method, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes()), member_reg);
       break;
     case vmIntrinsics::_linkToStatic:
       if (VerifyMethodHandles) {
         verify_ref_kind(_masm, JVM_REF_invokeStatic, member_reg, temp2);
       }
       __ ld(R19_method, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes()), member_reg);
       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(temp2_index, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes()), member_reg);
       if (VerifyMethodHandles) {
         Label L_index_ok;
         __ cmpdi(CCR1, temp2_index, 0);
         __ bge(CCR1, 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, R19_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_not_null(temp2_intf, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes()), member_reg);
       load_klass_from_Class(_masm, temp2_intf, temp3, temp4);
       __ verify_klass_ptr(temp2_intf);
       Register vtable_index = R19_method;
       __ ld(vtable_index, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes()), member_reg);
       if (VerifyMethodHandles) {
         Label L_index_ok;
         __ cmpdi(CCR1, vtable_index, 0);
         __ bge(CCR1, L_index_ok);
         __ stop("invalid vtable index for MH.invokeInterface");
         __ BIND(L_index_ok);
       }
       // 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:
                                  vtable_index, R19_method,
                                  temp3, temp4,
                                  L_incompatible_class_change_error);
       break;
     }
     default:
       fatal(err_msg_res("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid)));
       break;
     }
     // Live at this point:
     //   R19_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(R19_method);
     jump_from_method_handle(_masm, R19_method, temp1, temp2, for_compiler_entry);
     if (iid == vmIntrinsics::_linkToInterface) {
       __ BIND(L_incompatible_class_change_error);
       __ load_const_optimized(temp1, StubRoutines::throw_IncompatibleClassChangeError_entry());
       __ mtctr(temp1);
       __ bctr();
     }
   }
 }
 #ifndef PRODUCT
 void trace_method_handle_stub(const char* adaptername,
                               oopDesc* mh,
                               intptr_t* entry_sp,
                               intptr_t* saved_regs) {
   bool has_mh = (strstr(adaptername, "/static") == NULL &&
                  strstr(adaptername, "linkTo") == NULL);    // static linkers don't have MH
   const char* mh_reg_name = has_mh ? "R23_method_handle" : "G23";
   tty->print_cr("MH %s %s="INTPTR_FORMAT " sp=" INTPTR_FORMAT,
                 adaptername, mh_reg_name, (intptr_t) mh, entry_sp);
   if (Verbose) {
     tty->print_cr("Registers:");
     const int abi_offset = frame::abi_reg_args_size / 8;
     for (int i = R3->encoding(); i <= R12->encoding(); i++) {
       Register r = as_Register(i);
       int count = i - R3->encoding();
       // The registers are stored in reverse order on the stack (by save_volatile_gprs(R1_SP, abi_reg_args_size)).
       tty->print("%3s=" PTR_FORMAT, r->name(), saved_regs[abi_offset + count]);
       if ((count + 1) % 4 == 0) {
         tty->cr();
       } else {
         tty->print(", ");
       }
     }
     tty->cr();
     {
       // 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 PC on the stack top (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
       // Current C frame
       frame cur_frame = os::current_frame();
       // Robust search of trace_calling_frame (independant of inlining).
       // Assumes saved_regs comes from a pusha in the trace_calling_frame.
       assert(cur_frame.sp() < saved_regs, "registers not saved on stack ?");
       frame trace_calling_frame = os::get_sender_for_C_frame(&cur_frame);
       while (trace_calling_frame.fp() < saved_regs) {
         trace_calling_frame = os::get_sender_for_C_frame(&trace_calling_frame);
       }
       // Safely create a frame and call frame::describe.
       intptr_t *dump_sp = trace_calling_frame.sender_sp();
       frame dump_frame = frame(dump_sp);
       dump_frame.describe(values, 1);
       values.describe(-1, saved_regs, "raw top of stack");
       tty->print_cr("Stack layout:");
       values.print(p);
     }
     if (has_mh && mh->is_oop()) {
       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 {");
   int nbytes_save = 10 * 8;             // 10 volatile gprs
   __ save_LR_CR(R0);
   __ mr(R0, R1_SP);                     // saved_sp
   assert(Assembler::is_simm(-nbytes_save, 16), "Overwriting R0");
   // Push_frame_reg_args only uses R0 if nbytes_save is wider than 16 bit.
   __ push_frame_reg_args(nbytes_save, R0);
   __ save_volatile_gprs(R1_SP, frame::abi_reg_args_size); // Except R0.
   __ load_const(R3_ARG1, (address)adaptername);
   __ mr(R4_ARG2, R23_method_handle);
   __ mr(R5_ARG3, R0);        // saved_sp
   __ mr(R6_ARG4, R1_SP);
   __ call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub));
   __ restore_volatile_gprs(R1_SP, 112); // Except R0.
   __ pop_frame();
   __ restore_LR_CR(R0);
   BLOCK_COMMENT("} trace_method_handle");
 }
 #endif // PRODUCT

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/ppc/vm/methodHandles_ppc.cpp@710a3c8b516e (annotated)

src/cpu/ppc/vm/methodHandles_ppc.cpp