jdk8-mips64-public/hotspot: src/cpu/x86/vm/methodHandles

src/cpu/x86/vm/methodHandles_x86.cpp@df6caf649ff7 (annotated)

src/cpu/x86/vm/methodHandles_x86.cpp

Tue, 14 Jul 2009 15:40:39 -0700

author: ysr
date: Tue, 14 Jul 2009 15:40:39 -0700
changeset 1280: df6caf649ff7
parent 1145: e5b0439ef4ae
child 1474: 987e948ebbc8
permissions: -rw-r--r--

6700789: G1: Enable use of compressed oops with G1 heaps
Summary: Modifications to G1 so as to allow the use of compressed oops.
Reviewed-by: apetrusenko, coleenp, jmasa, kvn, never, phh, tonyp

 /*
  * Copyright 1997-2009 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  *
  */
 #include "incls/_precompiled.incl"
 #include "incls/_methodHandles_x86.cpp.incl"
 #define __ _masm->
 address MethodHandleEntry::start_compiled_entry(MacroAssembler* _masm,
                                                 address interpreted_entry) {
   // Just before the actual machine code entry point, allocate space
   // for a MethodHandleEntry::Data record, so that we can manage everything
   // from one base pointer.
   __ align(wordSize);
   address target = __ pc() + sizeof(Data);
   while (__ pc() < target) {
     __ nop();
     __ align(wordSize);
   }
   MethodHandleEntry* me = (MethodHandleEntry*) __ pc();
   me->set_end_address(__ pc());         // set a temporary end_address
   me->set_from_interpreted_entry(interpreted_entry);
   me->set_type_checking_entry(NULL);
   return (address) me;
 }
 MethodHandleEntry* MethodHandleEntry::finish_compiled_entry(MacroAssembler* _masm,
                                                 address start_addr) {
   MethodHandleEntry* me = (MethodHandleEntry*) start_addr;
   assert(me->end_address() == start_addr, "valid ME");
   // Fill in the real end_address:
   __ align(wordSize);
   me->set_end_address(__ pc());
   return me;
 }
 #ifdef ASSERT
 static void verify_argslot(MacroAssembler* _masm, Register rax_argslot,
                            const char* error_message) {
   // Verify that argslot lies within (rsp, rbp].
   Label L_ok, L_bad;
   __ cmpptr(rax_argslot, rbp);
   __ jcc(Assembler::above, L_bad);
   __ cmpptr(rsp, rax_argslot);
   __ jcc(Assembler::below, L_ok);
   __ bind(L_bad);
   __ stop(error_message);
   __ bind(L_ok);
 }
 #endif
 // Code generation
 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm) {
   // rbx: methodOop
   // rcx: receiver method handle (must load from sp[MethodTypeForm.vmslots])
   // rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted)
   // rdx: garbage temp, blown away
   Register rbx_method = rbx;
   Register rcx_recv   = rcx;
   Register rax_mtype  = rax;
   Register rdx_temp   = rdx;
   // emit WrongMethodType path first, to enable jccb back-branch from main path
   Label wrong_method_type;
   __ bind(wrong_method_type);
   __ push(rax_mtype);       // required mtype
   __ push(rcx_recv);        // bad mh (1st stacked argument)
   __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
   // here's where control starts out:
   __ align(CodeEntryAlignment);
   address entry_point = __ pc();
   // fetch the MethodType from the method handle into rax (the 'check' register)
   {
     Register tem = rbx_method;
     for (jint* pchase = methodOopDesc::method_type_offsets_chain(); (*pchase) != -1; pchase++) {
       __ movptr(rax_mtype, Address(tem, *pchase));
       tem = rax_mtype;          // in case there is another indirection
     }
   }
   Register rbx_temp = rbx_method; // done with incoming methodOop
   // given the MethodType, find out where the MH argument is buried
   __ movptr(rdx_temp, Address(rax_mtype,
                               __ delayed_value(java_dyn_MethodType::form_offset_in_bytes, rbx_temp)));
   __ movl(rdx_temp, Address(rdx_temp,
                             __ delayed_value(java_dyn_MethodTypeForm::vmslots_offset_in_bytes, rbx_temp)));
   __ movptr(rcx_recv, __ argument_address(rdx_temp));
   __ check_method_handle_type(rax_mtype, rcx_recv, rdx_temp, wrong_method_type);
   __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
   return entry_point;
 }
 // Helper to insert argument slots into the stack.
 // arg_slots must be a multiple of stack_move_unit() and <= 0
 void MethodHandles::insert_arg_slots(MacroAssembler* _masm,
                                      RegisterOrConstant arg_slots,
                                      int arg_mask,
                                      Register rax_argslot,
                                      Register rbx_temp, Register rdx_temp) {
   assert_different_registers(rax_argslot, rbx_temp, rdx_temp,
                              (!arg_slots.is_register() ? rsp : arg_slots.as_register()));
 #ifdef ASSERT
   verify_argslot(_masm, rax_argslot, "insertion point must fall within current frame");
   if (arg_slots.is_register()) {
     Label L_ok, L_bad;
     __ cmpptr(arg_slots.as_register(), (int32_t) NULL_WORD);
     __ jcc(Assembler::greater, L_bad);
     __ testl(arg_slots.as_register(), -stack_move_unit() - 1);
     __ jcc(Assembler::zero, L_ok);
     __ bind(L_bad);
     __ stop("assert arg_slots <= 0 and clear low bits");
     __ bind(L_ok);
   } else {
     assert(arg_slots.as_constant() <= 0, "");
     assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
   }
 #endif //ASSERT
 #ifdef _LP64
   if (arg_slots.is_register()) {
     // clean high bits of stack motion register (was loaded as an int)
     __ movslq(arg_slots.as_register(), arg_slots.as_register());
   }
 #endif
   // Make space on the stack for the inserted argument(s).
   // Then pull down everything shallower than rax_argslot.
   // The stacked return address gets pulled down with everything else.
   // That is, copy [rsp, argslot) downward by -size words.  In pseudo-code:
   //   rsp -= size;
   //   for (rdx = rsp + size; rdx < argslot; rdx++)
   //     rdx[-size] = rdx[0]
   //   argslot -= size;
   __ mov(rdx_temp, rsp);                        // source pointer for copy
   __ lea(rsp, Address(rsp, arg_slots, Address::times_ptr));
   {
     Label loop;
     __ bind(loop);
     // pull one word down each time through the loop
     __ movptr(rbx_temp, Address(rdx_temp, 0));
     __ movptr(Address(rdx_temp, arg_slots, Address::times_ptr), rbx_temp);
     __ addptr(rdx_temp, wordSize);
     __ cmpptr(rdx_temp, rax_argslot);
     __ jcc(Assembler::less, loop);
   }
   // Now move the argslot down, to point to the opened-up space.
   __ lea(rax_argslot, Address(rax_argslot, arg_slots, Address::times_ptr));
   if (TaggedStackInterpreter && arg_mask != _INSERT_NO_MASK) {
     // The caller has specified a bitmask of tags to put into the opened space.
     // This only works when the arg_slots value is an assembly-time constant.
     int constant_arg_slots = arg_slots.as_constant() / stack_move_unit();
     int tag_offset = Interpreter::tag_offset_in_bytes() - Interpreter::value_offset_in_bytes();
     for (int slot = 0; slot < constant_arg_slots; slot++) {
       BasicType slot_type   = ((arg_mask & (1 << slot)) == 0 ? T_OBJECT : T_INT);
       int       slot_offset = Interpreter::stackElementSize() * slot;
       Address   tag_addr(rax_argslot, slot_offset + tag_offset);
       __ movptr(tag_addr, frame::tag_for_basic_type(slot_type));
     }
     // Note that the new argument slots are tagged properly but contain
     // garbage at this point.  The value portions must be initialized
     // by the caller.  (Especially references!)
   }
 }
 // Helper to remove argument slots from the stack.
 // arg_slots must be a multiple of stack_move_unit() and >= 0
 void MethodHandles::remove_arg_slots(MacroAssembler* _masm,
                                     RegisterOrConstant arg_slots,
                                     Register rax_argslot,
                                     Register rbx_temp, Register rdx_temp) {
   assert_different_registers(rax_argslot, rbx_temp, rdx_temp,
                              (!arg_slots.is_register() ? rsp : arg_slots.as_register()));
 #ifdef ASSERT
   {
     // Verify that [argslot..argslot+size) lies within (rsp, rbp).
     Label L_ok, L_bad;
     __ lea(rbx_temp, Address(rax_argslot, arg_slots, Address::times_ptr));
     __ cmpptr(rbx_temp, rbp);
     __ jcc(Assembler::above, L_bad);
     __ cmpptr(rsp, rax_argslot);
     __ jcc(Assembler::below, L_ok);
     __ bind(L_bad);
     __ stop("deleted argument(s) must fall within current frame");
     __ bind(L_ok);
   }
   if (arg_slots.is_register()) {
     Label L_ok, L_bad;
     __ cmpptr(arg_slots.as_register(), (int32_t) NULL_WORD);
     __ jcc(Assembler::less, L_bad);
     __ testl(arg_slots.as_register(), -stack_move_unit() - 1);
     __ jcc(Assembler::zero, L_ok);
     __ bind(L_bad);
     __ stop("assert arg_slots >= 0 and clear low bits");
     __ bind(L_ok);
   } else {
     assert(arg_slots.as_constant() >= 0, "");
     assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
   }
 #endif //ASSERT
 #ifdef _LP64
   if (false) {                  // not needed, since register is positive
     // clean high bits of stack motion register (was loaded as an int)
     if (arg_slots.is_register())
       __ movslq(arg_slots.as_register(), arg_slots.as_register());
   }
 #endif
   // Pull up everything shallower than rax_argslot.
   // Then remove the excess space on the stack.
   // The stacked return address gets pulled up with everything else.
   // That is, copy [rsp, argslot) upward by size words.  In pseudo-code:
   //   for (rdx = argslot-1; rdx >= rsp; --rdx)
   //     rdx[size] = rdx[0]
   //   argslot += size;
   //   rsp += size;
   __ lea(rdx_temp, Address(rax_argslot, -wordSize)); // source pointer for copy
   {
     Label loop;
     __ bind(loop);
     // pull one word up each time through the loop
     __ movptr(rbx_temp, Address(rdx_temp, 0));
     __ movptr(Address(rdx_temp, arg_slots, Address::times_ptr), rbx_temp);
     __ addptr(rdx_temp, -wordSize);
     __ cmpptr(rdx_temp, rsp);
     __ jcc(Assembler::greaterEqual, loop);
   }
   // Now move the argslot up, to point to the just-copied block.
   __ lea(rsp, Address(rsp, arg_slots, Address::times_ptr));
   // And adjust the argslot address to point at the deletion point.
   __ lea(rax_argslot, Address(rax_argslot, arg_slots, Address::times_ptr));
 }
 #ifndef PRODUCT
 void trace_method_handle_stub(const char* adaptername,
                               oopDesc* mh,
                               intptr_t* entry_sp,
                               intptr_t* saved_sp) {
   // called as a leaf from native code: do not block the JVM!
   printf("MH %s "PTR_FORMAT" "PTR_FORMAT" "INTX_FORMAT"\n", adaptername, (void*)mh, entry_sp, entry_sp - saved_sp);
 }
 #endif //PRODUCT
 // Generate an "entry" field for a method handle.
 // This determines how the method handle will respond to calls.
 void MethodHandles::generate_method_handle_stub(MacroAssembler* _masm, MethodHandles::EntryKind ek) {
   // Here is the register state during an interpreted call,
   // as set up by generate_method_handle_interpreter_entry():
   // - rbx: garbage temp (was MethodHandle.invoke methodOop, unused)
   // - rcx: receiver method handle
   // - rax: method handle type (only used by the check_mtype entry point)
   // - rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted)
   // - rdx: garbage temp, can blow away
   Register rcx_recv    = rcx;
   Register rax_argslot = rax;
   Register rbx_temp    = rbx;
   Register rdx_temp    = rdx;
   guarantee(java_dyn_MethodHandle::vmentry_offset_in_bytes() != 0, "must have offsets");
   // some handy addresses
   Address rbx_method_fie(     rbx,      methodOopDesc::from_interpreted_offset() );
   Address rcx_mh_vmtarget(    rcx_recv, java_dyn_MethodHandle::vmtarget_offset_in_bytes() );
   Address rcx_dmh_vmindex(    rcx_recv, sun_dyn_DirectMethodHandle::vmindex_offset_in_bytes() );
   Address rcx_bmh_vmargslot(  rcx_recv, sun_dyn_BoundMethodHandle::vmargslot_offset_in_bytes() );
   Address rcx_bmh_argument(   rcx_recv, sun_dyn_BoundMethodHandle::argument_offset_in_bytes() );
   Address rcx_amh_vmargslot(  rcx_recv, sun_dyn_AdapterMethodHandle::vmargslot_offset_in_bytes() );
   Address rcx_amh_argument(   rcx_recv, sun_dyn_AdapterMethodHandle::argument_offset_in_bytes() );
   Address rcx_amh_conversion( rcx_recv, sun_dyn_AdapterMethodHandle::conversion_offset_in_bytes() );
   Address vmarg;                // __ argument_address(vmargslot)
   int tag_offset = -1;
   if (TaggedStackInterpreter) {
     tag_offset = Interpreter::tag_offset_in_bytes() - Interpreter::value_offset_in_bytes();
     assert(tag_offset = wordSize, "stack grows as expected");
   }
   if (have_entry(ek)) {
     __ nop();                   // empty stubs make SG sick
     return;
   }
   address interp_entry = __ pc();
   if (UseCompressedOops)  __ unimplemented("UseCompressedOops");
 #ifndef PRODUCT
   if (TraceMethodHandles) {
     __ push(rax); __ push(rbx); __ push(rcx); __ push(rdx); __ push(rsi); __ push(rdi);
     __ lea(rax, Address(rsp, wordSize*6)); // entry_sp
     // arguments:
     __ push(rsi);               // saved_sp
     __ push(rax);               // entry_sp
     __ push(rcx);               // mh
     __ push(rcx);
     __ movptr(Address(rsp, 0), (intptr_t)entry_name(ek));
     __ call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub), 4);
     __ pop(rdi); __ pop(rsi); __ pop(rdx); __ pop(rcx); __ pop(rbx); __ pop(rax);
   }
 #endif //PRODUCT
   switch ((int) ek) {
   case _check_mtype:
     {
       // this stub is special, because it requires a live mtype argument
       Register rax_mtype = rax;
       // emit WrongMethodType path first, to enable jccb back-branch
       Label wrong_method_type;
       __ bind(wrong_method_type);
       __ movptr(rdx_temp, ExternalAddress((address) &_entries[_wrong_method_type]));
       __ jmp(Address(rdx_temp, MethodHandleEntry::from_interpreted_entry_offset_in_bytes()));
       __ hlt();
       interp_entry = __ pc();
       __ check_method_handle_type(rax_mtype, rcx_recv, rdx_temp, wrong_method_type);
       // now rax_mtype is dead; subsequent stubs will use it as a temp
       __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
     }
     break;
   case _wrong_method_type:
     {
       // this stub is special, because it requires a live mtype argument
       Register rax_mtype = rax;
       interp_entry = __ pc();
       __ push(rax_mtype);       // required mtype
       __ push(rcx_recv);        // random mh (1st stacked argument)
       __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
     }
     break;
   case _invokestatic_mh:
   case _invokespecial_mh:
     {
       Register rbx_method = rbx_temp;
       __ movptr(rbx_method, rcx_mh_vmtarget); // target is a methodOop
       __ verify_oop(rbx_method);
       // same as TemplateTable::invokestatic or invokespecial,
       // minus the CP setup and profiling:
       if (ek == _invokespecial_mh) {
         // Must load & check the first argument before entering the target method.
         __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
         __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
         __ null_check(rcx_recv);
         __ verify_oop(rcx_recv);
       }
       __ jmp(rbx_method_fie);
     }
     break;
   case _invokevirtual_mh:
     {
       // same as TemplateTable::invokevirtual,
       // minus the CP setup and profiling:
       // pick out the vtable index and receiver offset from the MH,
       // and then we can discard it:
       __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
       Register rbx_index = rbx_temp;
       __ movl(rbx_index, rcx_dmh_vmindex);
       // Note:  The verifier allows us to ignore rcx_mh_vmtarget.
       __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
       __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
       // get receiver klass
       Register rax_klass = rax_argslot;
       __ load_klass(rax_klass, rcx_recv);
       __ verify_oop(rax_klass);
       // get target methodOop & entry point
       const int base = instanceKlass::vtable_start_offset() * wordSize;
       assert(vtableEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
       Address vtable_entry_addr(rax_klass,
                                 rbx_index, Address::times_ptr,
                                 base + vtableEntry::method_offset_in_bytes());
       Register rbx_method = rbx_temp;
       __ movl(rbx_method, vtable_entry_addr);
       __ verify_oop(rbx_method);
       __ jmp(rbx_method_fie);
     }
     break;
   case _invokeinterface_mh:
     {
       // same as TemplateTable::invokeinterface,
       // minus the CP setup and profiling:
       // pick out the interface and itable index from the MH.
       __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
       Register rdx_intf  = rdx_temp;
       Register rbx_index = rbx_temp;
       __ movptr(rdx_intf,  rcx_mh_vmtarget);
       __ movl(rbx_index,   rcx_dmh_vmindex);
       __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
       __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
       // get receiver klass
       Register rax_klass = rax_argslot;
       __ load_klass(rax_klass, rcx_recv);
       __ verify_oop(rax_klass);
       Register rcx_temp   = rcx_recv;
       Register rbx_method = rbx_index;
       // get interface klass
       Label no_such_interface;
       __ verify_oop(rdx_intf);
       __ lookup_interface_method(rax_klass, rdx_intf,
                                  // note: next two args must be the same:
                                  rbx_index, rbx_method,
                                  rcx_temp,
                                  no_such_interface);
       __ verify_oop(rbx_method);
       __ jmp(rbx_method_fie);
       __ hlt();
       __ bind(no_such_interface);
       // Throw an exception.
       // For historical reasons, it will be IncompatibleClassChangeError.
       __ should_not_reach_here(); // %%% FIXME NYI
     }
     break;
   case _bound_ref_mh:
   case _bound_int_mh:
   case _bound_long_mh:
   case _bound_ref_direct_mh:
   case _bound_int_direct_mh:
   case _bound_long_direct_mh:
     {
       bool direct_to_method = (ek >= _bound_ref_direct_mh);
       BasicType arg_type = T_ILLEGAL;
       if (ek == _bound_long_mh || ek == _bound_long_direct_mh) {
         arg_type = T_LONG;
       } else if (ek == _bound_int_mh || ek == _bound_int_direct_mh) {
         arg_type = T_INT;
       } else {
         assert(ek == _bound_ref_mh || ek == _bound_ref_direct_mh, "must be ref");
         arg_type = T_OBJECT;
       }
       int arg_slots = type2size[arg_type];
       int arg_mask  = (arg_type == T_OBJECT ? _INSERT_REF_MASK :
                        arg_slots == 1       ? _INSERT_INT_MASK :  _INSERT_LONG_MASK);
       // make room for the new argument:
       __ movl(rax_argslot, rcx_bmh_vmargslot);
       __ lea(rax_argslot, __ argument_address(rax_argslot));
       insert_arg_slots(_masm, arg_slots * stack_move_unit(), arg_mask,
                        rax_argslot, rbx_temp, rdx_temp);
       // store bound argument into the new stack slot:
       __ movptr(rbx_temp, rcx_bmh_argument);
       Address prim_value_addr(rbx_temp, java_lang_boxing_object::value_offset_in_bytes(arg_type));
       if (arg_type == T_OBJECT) {
         __ movptr(Address(rax_argslot, 0), rbx_temp);
       } else {
         __ load_sized_value(rbx_temp, prim_value_addr,
                             type2aelembytes(arg_type), is_signed_subword_type(arg_type));
         __ movptr(Address(rax_argslot, 0), rbx_temp);
 #ifndef _LP64
         if (arg_slots == 2) {
           __ movl(rbx_temp, prim_value_addr.plus_disp(wordSize));
           __ movl(Address(rax_argslot, Interpreter::stackElementSize()), rbx_temp);
         }
 #endif //_LP64
         break;
       }
       if (direct_to_method) {
         Register rbx_method = rbx_temp;
         __ movptr(rbx_method, rcx_mh_vmtarget);
         __ verify_oop(rbx_method);
         __ jmp(rbx_method_fie);
       } else {
         __ movptr(rcx_recv, rcx_mh_vmtarget);
         __ verify_oop(rcx_recv);
         __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
       }
     }
     break;
   case _adapter_retype_only:
     // immediately jump to the next MH layer:
     __ movptr(rcx_recv, rcx_mh_vmtarget);
     __ verify_oop(rcx_recv);
     __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
     // This is OK when all parameter types widen.
     // It is also OK when a return type narrows.
     break;
   case _adapter_check_cast:
     {
       // temps:
       Register rbx_klass = rbx_temp; // interesting AMH data
       // check a reference argument before jumping to the next layer of MH:
       __ movl(rax_argslot, rcx_amh_vmargslot);
       vmarg = __ argument_address(rax_argslot);
       // What class are we casting to?
       __ movptr(rbx_klass, rcx_amh_argument); // this is a Class object!
       __ movptr(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
       // get the new MH:
       __ movptr(rcx_recv, rcx_mh_vmtarget);
       // (now we are done with the old MH)
       Label done;
       __ movptr(rdx_temp, vmarg);
       __ testl(rdx_temp, rdx_temp);
       __ jcc(Assembler::zero, done);          // no cast if null
       __ load_klass(rdx_temp, rdx_temp);
       // live at this point:
       // - rbx_klass:  klass required by the target method
       // - rdx_temp:   argument klass to test
       // - rcx_recv:   method handle to invoke (after cast succeeds)
       __ check_klass_subtype(rdx_temp, rbx_klass, rax_argslot, done);
       // If we get here, the type check failed!
       // Call the wrong_method_type stub, passing the failing argument type in rax.
       Register rax_mtype = rax_argslot;
       __ push(rbx_klass);       // missed klass (required type)
       __ push(rdx_temp);        // bad actual type (1st stacked argument)
       __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
       __ bind(done);
       __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
     }
     break;
   case _adapter_prim_to_prim:
   case _adapter_ref_to_prim:
     // handled completely by optimized cases
     __ stop("init_AdapterMethodHandle should not issue this");
     break;
   case _adapter_opt_i2i:        // optimized subcase of adapt_prim_to_prim
 //case _adapter_opt_f2i:        // optimized subcase of adapt_prim_to_prim
   case _adapter_opt_l2i:        // optimized subcase of adapt_prim_to_prim
   case _adapter_opt_unboxi:     // optimized subcase of adapt_ref_to_prim
     {
       // perform an in-place conversion to int or an int subword
       __ movl(rax_argslot, rcx_amh_vmargslot);
       vmarg = __ argument_address(rax_argslot);
       switch (ek) {
       case _adapter_opt_i2i:
         __ movl(rdx_temp, vmarg);
         break;
       case _adapter_opt_l2i:
         {
           // just delete the extra slot; on a little-endian machine we keep the first
           __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
           remove_arg_slots(_masm, -stack_move_unit(),
                            rax_argslot, rbx_temp, rdx_temp);
           vmarg = Address(rax_argslot, -Interpreter::stackElementSize());
           __ movl(rdx_temp, vmarg);
         }
         break;
       case _adapter_opt_unboxi:
         {
           // Load the value up from the heap.
           __ movptr(rdx_temp, vmarg);
           int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT);
 #ifdef ASSERT
           for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
             if (is_subword_type(BasicType(bt)))
               assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(BasicType(bt)), "");
           }
 #endif
           __ null_check(rdx_temp, value_offset);
           __ movl(rdx_temp, Address(rdx_temp, value_offset));
           // We load this as a word.  Because we are little-endian,
           // the low bits will be correct, but the high bits may need cleaning.
           // The vminfo will guide us to clean those bits.
         }
         break;
       default:
         assert(false, "");
       }
       goto finish_int_conversion;
     }
   finish_int_conversion:
     {
       Register rbx_vminfo = rbx_temp;
       __ movl(rbx_vminfo, rcx_amh_conversion);
       assert(CONV_VMINFO_SHIFT == 0, "preshifted");
       // get the new MH:
       __ movptr(rcx_recv, rcx_mh_vmtarget);
       // (now we are done with the old MH)
       // original 32-bit vmdata word must be of this form:
       //    | MBZ:16 | signBitCount:8 | srcDstTypes:8 | conversionOp:8 |
       __ xchgl(rcx, rbx_vminfo);                // free rcx for shifts
       __ shll(rdx_temp /*, rcx*/);
       Label zero_extend, done;
       __ testl(rcx, CONV_VMINFO_SIGN_FLAG);
       __ jcc(Assembler::zero, zero_extend);
       // this path is taken for int->byte, int->short
       __ sarl(rdx_temp /*, rcx*/);
       __ jmp(done);
       __ bind(zero_extend);
       // this is taken for int->char
       __ shrl(rdx_temp /*, rcx*/);
       __ bind(done);
       __ movptr(vmarg, rdx_temp);
       __ xchgl(rcx, rbx_vminfo);                // restore rcx_recv
       __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
     }
     break;
   case _adapter_opt_i2l:        // optimized subcase of adapt_prim_to_prim
   case _adapter_opt_unboxl:     // optimized subcase of adapt_ref_to_prim
     {
       // perform an in-place int-to-long or ref-to-long conversion
       __ movl(rax_argslot, rcx_amh_vmargslot);
       // on a little-endian machine we keep the first slot and add another after
       __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
       insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
                        rax_argslot, rbx_temp, rdx_temp);
       Address vmarg1(rax_argslot, -Interpreter::stackElementSize());
       Address vmarg2 = vmarg1.plus_disp(Interpreter::stackElementSize());
       switch (ek) {
       case _adapter_opt_i2l:
         {
           __ movl(rdx_temp, vmarg1);
           __ sarl(rdx_temp, 31);  // __ extend_sign()
           __ movl(vmarg2, rdx_temp); // store second word
         }
         break;
       case _adapter_opt_unboxl:
         {
           // Load the value up from the heap.
           __ movptr(rdx_temp, vmarg1);
           int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_LONG);
           assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE), "");
           __ null_check(rdx_temp, value_offset);
           __ movl(rbx_temp, Address(rdx_temp, value_offset + 0*BytesPerInt));
           __ movl(rdx_temp, Address(rdx_temp, value_offset + 1*BytesPerInt));
           __ movl(vmarg1, rbx_temp);
           __ movl(vmarg2, rdx_temp);
         }
         break;
       default:
         assert(false, "");
       }
       __ movptr(rcx_recv, rcx_mh_vmtarget);
       __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
     }
     break;
   case _adapter_opt_f2d:        // optimized subcase of adapt_prim_to_prim
   case _adapter_opt_d2f:        // optimized subcase of adapt_prim_to_prim
     {
       // perform an in-place floating primitive conversion
       __ movl(rax_argslot, rcx_amh_vmargslot);
       __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
       if (ek == _adapter_opt_f2d) {
         insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
                          rax_argslot, rbx_temp, rdx_temp);
       }
       Address vmarg(rax_argslot, -Interpreter::stackElementSize());
 #ifdef _LP64
       if (ek == _adapter_opt_f2d) {
         __ movflt(xmm0, vmarg);
         __ cvtss2sd(xmm0, xmm0);
         __ movdbl(vmarg, xmm0);
       } else {
         __ movdbl(xmm0, vmarg);
         __ cvtsd2ss(xmm0, xmm0);
         __ movflt(vmarg, xmm0);
       }
 #else //_LP64
       if (ek == _adapter_opt_f2d) {
         __ fld_s(vmarg);        // load float to ST0
         __ fstp_s(vmarg);       // store single
       } else if (!TaggedStackInterpreter) {
         __ fld_d(vmarg);        // load double to ST0
         __ fstp_s(vmarg);       // store single
       } else {
         Address vmarg_tag = vmarg.plus_disp(tag_offset);
         Address vmarg2    = vmarg.plus_disp(Interpreter::stackElementSize());
         // vmarg2_tag does not participate in this code
         Register rbx_tag = rbx_temp;
         __ movl(rbx_tag, vmarg_tag); // preserve tag
         __ movl(rdx_temp, vmarg2); // get second word of double
         __ movl(vmarg_tag, rdx_temp); // align with first word
         __ fld_d(vmarg);        // load double to ST0
         __ movl(vmarg_tag, rbx_tag); // restore tag
         __ fstp_s(vmarg);       // store single
       }
 #endif //_LP64
       if (ek == _adapter_opt_d2f) {
         remove_arg_slots(_masm, -stack_move_unit(),
                          rax_argslot, rbx_temp, rdx_temp);
       }
       __ movptr(rcx_recv, rcx_mh_vmtarget);
       __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
     }
     break;
   case _adapter_prim_to_ref:
     __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
     break;
   case _adapter_swap_args:
   case _adapter_rot_args:
     // handled completely by optimized cases
     __ stop("init_AdapterMethodHandle should not issue this");
     break;
   case _adapter_opt_swap_1:
   case _adapter_opt_swap_2:
   case _adapter_opt_rot_1_up:
   case _adapter_opt_rot_1_down:
   case _adapter_opt_rot_2_up:
   case _adapter_opt_rot_2_down:
     {
       int rotate = 0, swap_slots = 0;
       switch ((int)ek) {
       case _adapter_opt_swap_1:     swap_slots = 1; break;
       case _adapter_opt_swap_2:     swap_slots = 2; break;
       case _adapter_opt_rot_1_up:   swap_slots = 1; rotate++; break;
       case _adapter_opt_rot_1_down: swap_slots = 1; rotate--; break;
       case _adapter_opt_rot_2_up:   swap_slots = 2; rotate++; break;
       case _adapter_opt_rot_2_down: swap_slots = 2; rotate--; break;
       default: assert(false, "");
       }
       // the real size of the move must be doubled if TaggedStackInterpreter:
       int swap_bytes = (int)( swap_slots * Interpreter::stackElementWords() * wordSize );
       // 'argslot' is the position of the first argument to swap
       __ movl(rax_argslot, rcx_amh_vmargslot);
       __ lea(rax_argslot, __ argument_address(rax_argslot));
       // 'vminfo' is the second
       Register rbx_destslot = rbx_temp;
       __ movl(rbx_destslot, rcx_amh_conversion);
       assert(CONV_VMINFO_SHIFT == 0, "preshifted");
       __ andl(rbx_destslot, CONV_VMINFO_MASK);
       __ lea(rbx_destslot, __ argument_address(rbx_destslot));
       DEBUG_ONLY(verify_argslot(_masm, rbx_destslot, "swap point must fall within current frame"));
       if (!rotate) {
         for (int i = 0; i < swap_bytes; i += wordSize) {
           __ movptr(rdx_temp, Address(rax_argslot , i));
           __ push(rdx_temp);
           __ movptr(rdx_temp, Address(rbx_destslot, i));
           __ movptr(Address(rax_argslot, i), rdx_temp);
           __ pop(rdx_temp);
           __ movptr(Address(rbx_destslot, i), rdx_temp);
         }
       } else {
         // push the first chunk, which is going to get overwritten
         for (int i = swap_bytes; (i -= wordSize) >= 0; ) {
           __ movptr(rdx_temp, Address(rax_argslot, i));
           __ push(rdx_temp);
         }
         if (rotate > 0) {
           // rotate upward
           __ subptr(rax_argslot, swap_bytes);
 #ifdef ASSERT
           {
             // Verify that argslot > destslot, by at least swap_bytes.
             Label L_ok;
             __ cmpptr(rax_argslot, rbx_destslot);
             __ jcc(Assembler::aboveEqual, L_ok);
             __ stop("source must be above destination (upward rotation)");
             __ bind(L_ok);
           }
 #endif
           // work argslot down to destslot, copying contiguous data upwards
           // pseudo-code:
           //   rax = src_addr - swap_bytes
           //   rbx = dest_addr
           //   while (rax >= rbx) *(rax + swap_bytes) = *(rax + 0), rax--;
           Label loop;
           __ bind(loop);
           __ movptr(rdx_temp, Address(rax_argslot, 0));
           __ movptr(Address(rax_argslot, swap_bytes), rdx_temp);
           __ addptr(rax_argslot, -wordSize);
           __ cmpptr(rax_argslot, rbx_destslot);
           __ jcc(Assembler::aboveEqual, loop);
         } else {
           __ addptr(rax_argslot, swap_bytes);
 #ifdef ASSERT
           {
             // Verify that argslot < destslot, by at least swap_bytes.
             Label L_ok;
             __ cmpptr(rax_argslot, rbx_destslot);
             __ jcc(Assembler::belowEqual, L_ok);
             __ stop("source must be below destination (downward rotation)");
             __ bind(L_ok);
           }
 #endif
           // work argslot up to destslot, copying contiguous data downwards
           // pseudo-code:
           //   rax = src_addr + swap_bytes
           //   rbx = dest_addr
           //   while (rax <= rbx) *(rax - swap_bytes) = *(rax + 0), rax++;
           Label loop;
           __ bind(loop);
           __ movptr(rdx_temp, Address(rax_argslot, 0));
           __ movptr(Address(rax_argslot, -swap_bytes), rdx_temp);
           __ addptr(rax_argslot, wordSize);
           __ cmpptr(rax_argslot, rbx_destslot);
           __ jcc(Assembler::belowEqual, loop);
         }
         // pop the original first chunk into the destination slot, now free
         for (int i = 0; i < swap_bytes; i += wordSize) {
           __ pop(rdx_temp);
           __ movptr(Address(rbx_destslot, i), rdx_temp);
         }
       }
       __ movptr(rcx_recv, rcx_mh_vmtarget);
       __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
     }
     break;
   case _adapter_dup_args:
     {
       // 'argslot' is the position of the first argument to duplicate
       __ movl(rax_argslot, rcx_amh_vmargslot);
       __ lea(rax_argslot, __ argument_address(rax_argslot));
       // 'stack_move' is negative number of words to duplicate
       Register rdx_stack_move = rdx_temp;
       __ movl(rdx_stack_move, rcx_amh_conversion);
       __ sarl(rdx_stack_move, CONV_STACK_MOVE_SHIFT);
       int argslot0_num = 0;
       Address argslot0 = __ argument_address(RegisterOrConstant(argslot0_num));
       assert(argslot0.base() == rsp, "");
       int pre_arg_size = argslot0.disp();
       assert(pre_arg_size % wordSize == 0, "");
       assert(pre_arg_size > 0, "must include PC");
       // remember the old rsp+1 (argslot[0])
       Register rbx_oldarg = rbx_temp;
       __ lea(rbx_oldarg, argslot0);
       // move rsp down to make room for dups
       __ lea(rsp, Address(rsp, rdx_stack_move, Address::times_ptr));
       // compute the new rsp+1 (argslot[0])
       Register rdx_newarg = rdx_temp;
       __ lea(rdx_newarg, argslot0);
       __ push(rdi);             // need a temp
       // (preceding push must be done after arg addresses are taken!)
       // pull down the pre_arg_size data (PC)
       for (int i = -pre_arg_size; i < 0; i += wordSize) {
         __ movptr(rdi, Address(rbx_oldarg, i));
         __ movptr(Address(rdx_newarg, i), rdi);
       }
       // copy from rax_argslot[0...] down to new_rsp[1...]
       // pseudo-code:
       //   rbx = old_rsp+1
       //   rdx = new_rsp+1
       //   rax = argslot
       //   while (rdx < rbx) *rdx++ = *rax++
       Label loop;
       __ bind(loop);
       __ movptr(rdi, Address(rax_argslot, 0));
       __ movptr(Address(rdx_newarg, 0), rdi);
       __ addptr(rax_argslot, wordSize);
       __ addptr(rdx_newarg, wordSize);
       __ cmpptr(rdx_newarg, rbx_oldarg);
       __ jcc(Assembler::less, loop);
       __ pop(rdi);              // restore temp
       __ movptr(rcx_recv, rcx_mh_vmtarget);
       __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
     }
     break;
   case _adapter_drop_args:
     {
       // 'argslot' is the position of the first argument to nuke
       __ movl(rax_argslot, rcx_amh_vmargslot);
       __ lea(rax_argslot, __ argument_address(rax_argslot));
       __ push(rdi);             // need a temp
       // (must do previous push after argslot address is taken)
       // 'stack_move' is number of words to drop
       Register rdi_stack_move = rdi;
       __ movl(rdi_stack_move, rcx_amh_conversion);
       __ sarl(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
       remove_arg_slots(_masm, rdi_stack_move,
                        rax_argslot, rbx_temp, rdx_temp);
       __ pop(rdi);              // restore temp
       __ movptr(rcx_recv, rcx_mh_vmtarget);
       __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
     }
     break;
   case _adapter_collect_args:
     __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
     break;
   case _adapter_spread_args:
     // handled completely by optimized cases
     __ stop("init_AdapterMethodHandle should not issue this");
     break;
   case _adapter_opt_spread_0:
   case _adapter_opt_spread_1:
   case _adapter_opt_spread_more:
     {
       // spread an array out into a group of arguments
       int length_constant = -1;
       switch (ek) {
       case _adapter_opt_spread_0: length_constant = 0; break;
       case _adapter_opt_spread_1: length_constant = 1; break;
       }
       // find the address of the array argument
       __ movl(rax_argslot, rcx_amh_vmargslot);
       __ lea(rax_argslot, __ argument_address(rax_argslot));
       // grab some temps
       { __ push(rsi); __ push(rdi); }
       // (preceding pushes must be done after argslot address is taken!)
 #define UNPUSH_RSI_RDI \
       { __ pop(rdi); __ pop(rsi); }
       // arx_argslot points both to the array and to the first output arg
       vmarg = Address(rax_argslot, 0);
       // Get the array value.
       Register  rsi_array       = rsi;
       Register  rdx_array_klass = rdx_temp;
       BasicType elem_type       = T_OBJECT;
       int       length_offset   = arrayOopDesc::length_offset_in_bytes();
       int       elem0_offset    = arrayOopDesc::base_offset_in_bytes(elem_type);
       __ movptr(rsi_array, vmarg);
       Label skip_array_check;
       if (length_constant == 0) {
         __ testptr(rsi_array, rsi_array);
         __ jcc(Assembler::zero, skip_array_check);
       }
       __ null_check(rsi_array, oopDesc::klass_offset_in_bytes());
       __ load_klass(rdx_array_klass, rsi_array);
       // Check the array type.
       Register rbx_klass = rbx_temp;
       __ movptr(rbx_klass, rcx_amh_argument); // this is a Class object!
       __ movptr(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
       Label ok_array_klass, bad_array_klass, bad_array_length;
       __ check_klass_subtype(rdx_array_klass, rbx_klass, rdi, ok_array_klass);
       // If we get here, the type check failed!
       __ jmp(bad_array_klass);
       __ bind(ok_array_klass);
       // Check length.
       if (length_constant >= 0) {
         __ cmpl(Address(rsi_array, length_offset), length_constant);
       } else {
         Register rbx_vminfo = rbx_temp;
         __ movl(rbx_vminfo, rcx_amh_conversion);
         assert(CONV_VMINFO_SHIFT == 0, "preshifted");
         __ andl(rbx_vminfo, CONV_VMINFO_MASK);
         __ cmpl(rbx_vminfo, Address(rsi_array, length_offset));
       }
       __ jcc(Assembler::notEqual, bad_array_length);
       Register rdx_argslot_limit = rdx_temp;
       // Array length checks out.  Now insert any required stack slots.
       if (length_constant == -1) {
         // Form a pointer to the end of the affected region.
         __ lea(rdx_argslot_limit, Address(rax_argslot, Interpreter::stackElementSize()));
         // 'stack_move' is negative number of words to insert
         Register rdi_stack_move = rdi;
         __ movl(rdi_stack_move, rcx_amh_conversion);
         __ sarl(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
         Register rsi_temp = rsi_array;  // spill this
         insert_arg_slots(_masm, rdi_stack_move, -1,
                          rax_argslot, rbx_temp, rsi_temp);
         // reload the array (since rsi was killed)
         __ movptr(rsi_array, vmarg);
       } else if (length_constant > 1) {
         int arg_mask = 0;
         int new_slots = (length_constant - 1);
         for (int i = 0; i < new_slots; i++) {
           arg_mask <<= 1;
           arg_mask |= _INSERT_REF_MASK;
         }
         insert_arg_slots(_masm, new_slots * stack_move_unit(), arg_mask,
                          rax_argslot, rbx_temp, rdx_temp);
       } else if (length_constant == 1) {
         // no stack resizing required
       } else if (length_constant == 0) {
         remove_arg_slots(_masm, -stack_move_unit(),
                          rax_argslot, rbx_temp, rdx_temp);
       }
       // Copy from the array to the new slots.
       // Note: Stack change code preserves integrity of rax_argslot pointer.
       // So even after slot insertions, rax_argslot still points to first argument.
       if (length_constant == -1) {
         // [rax_argslot, rdx_argslot_limit) is the area we are inserting into.
         Register rsi_source = rsi_array;
         __ lea(rsi_source, Address(rsi_array, elem0_offset));
         Label loop;
         __ bind(loop);
         __ movptr(rbx_temp, Address(rsi_source, 0));
         __ movptr(Address(rax_argslot, 0), rbx_temp);
         __ addptr(rsi_source, type2aelembytes(elem_type));
         if (TaggedStackInterpreter) {
           __ movptr(Address(rax_argslot, tag_offset),
                     frame::tag_for_basic_type(elem_type));
         }
         __ addptr(rax_argslot, Interpreter::stackElementSize());
         __ cmpptr(rax_argslot, rdx_argslot_limit);
         __ jcc(Assembler::less, loop);
       } else if (length_constant == 0) {
         __ bind(skip_array_check);
         // nothing to copy
       } else {
         int elem_offset = elem0_offset;
         int slot_offset = 0;
         for (int index = 0; index < length_constant; index++) {
           __ movptr(rbx_temp, Address(rsi_array, elem_offset));
           __ movptr(Address(rax_argslot, slot_offset), rbx_temp);
           elem_offset += type2aelembytes(elem_type);
           if (TaggedStackInterpreter) {
             __ movptr(Address(rax_argslot, slot_offset + tag_offset),
                       frame::tag_for_basic_type(elem_type));
           }
           slot_offset += Interpreter::stackElementSize();
         }
       }
       // Arguments are spread.  Move to next method handle.
       UNPUSH_RSI_RDI;
       __ movptr(rcx_recv, rcx_mh_vmtarget);
       __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
       __ bind(bad_array_klass);
       UNPUSH_RSI_RDI;
       __ stop("bad array klass NYI");
       __ bind(bad_array_length);
       UNPUSH_RSI_RDI;
       __ stop("bad array length NYI");
 #undef UNPUSH_RSI_RDI
     }
     break;
   case _adapter_flyby:
   case _adapter_ricochet:
     __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
     break;
   default:  ShouldNotReachHere();
   }
   __ hlt();
   address me_cookie = MethodHandleEntry::start_compiled_entry(_masm, interp_entry);
   __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
   init_entry(ek, MethodHandleEntry::finish_compiled_entry(_masm, me_cookie));
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/x86/vm/methodHandles_x86.cpp@df6caf649ff7 (annotated)

src/cpu/x86/vm/methodHandles_x86.cpp