jdk8-mips64-public/hotspot: src/cpu/x86/vm/templateInterpreter_x86

src/cpu/x86/vm/templateInterpreter_x86_64.cpp@47766e2d2527 (annotated)

src/cpu/x86/vm/templateInterpreter_x86_64.cpp

Wed, 24 Apr 2013 18:20:04 -0400

author: jiangli
date: Wed, 24 Apr 2013 18:20:04 -0400
changeset 4973: 47766e2d2527
parent 4936: aeaca88565e6
child 5225: 603ca7e51354
permissions: -rw-r--r--

8013041: guarantee(this->is8bit(imm8)) failed: Short forward jump exceeds 8-bit offset.
Summary: Change jmpb() to jmp().
Reviewed-by: coleenp, rdurbin, dcubed

 /*
  * Copyright (c) 2003, 2013, 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 "asm/macroAssembler.hpp"
 #include "interpreter/bytecodeHistogram.hpp"
 #include "interpreter/interpreter.hpp"
 #include "interpreter/interpreterGenerator.hpp"
 #include "interpreter/interpreterRuntime.hpp"
 #include "interpreter/templateTable.hpp"
 #include "oops/arrayOop.hpp"
 #include "oops/methodData.hpp"
 #include "oops/method.hpp"
 #include "oops/oop.inline.hpp"
 #include "prims/jvmtiExport.hpp"
 #include "prims/jvmtiThreadState.hpp"
 #include "runtime/arguments.hpp"
 #include "runtime/deoptimization.hpp"
 #include "runtime/frame.inline.hpp"
 #include "runtime/sharedRuntime.hpp"
 #include "runtime/stubRoutines.hpp"
 #include "runtime/synchronizer.hpp"
 #include "runtime/timer.hpp"
 #include "runtime/vframeArray.hpp"
 #include "utilities/debug.hpp"
 #include "utilities/macros.hpp"
 #define __ _masm->
 #ifndef CC_INTERP
 const int method_offset = frame::interpreter_frame_method_offset * wordSize;
 const int bci_offset    = frame::interpreter_frame_bcx_offset    * wordSize;
 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize;
 //-----------------------------------------------------------------------------
 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
   address entry = __ pc();
 #ifdef ASSERT
   {
     Label L;
     __ lea(rax, Address(rbp,
                         frame::interpreter_frame_monitor_block_top_offset *
                         wordSize));
     __ cmpptr(rax, rsp); // rax = maximal rsp for current rbp (stack
                          // grows negative)
     __ jcc(Assembler::aboveEqual, L); // check if frame is complete
     __ stop ("interpreter frame not set up");
     __ bind(L);
   }
 #endif // ASSERT
   // Restore bcp under the assumption that the current frame is still
   // interpreted
   __ restore_bcp();
   // expression stack must be empty before entering the VM if an
   // exception happened
   __ empty_expression_stack();
   // throw exception
   __ call_VM(noreg,
              CAST_FROM_FN_PTR(address,
                               InterpreterRuntime::throw_StackOverflowError));
   return entry;
 }
 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(
         const char* name) {
   address entry = __ pc();
   // expression stack must be empty before entering the VM if an
   // exception happened
   __ empty_expression_stack();
   // setup parameters
   // ??? convention: expect aberrant index in register ebx
   __ lea(c_rarg1, ExternalAddress((address)name));
   __ call_VM(noreg,
              CAST_FROM_FN_PTR(address,
                               InterpreterRuntime::
                               throw_ArrayIndexOutOfBoundsException),
              c_rarg1, rbx);
   return entry;
 }
 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
   address entry = __ pc();
   // object is at TOS
   __ pop(c_rarg1);
   // expression stack must be empty before entering the VM if an
   // exception happened
   __ empty_expression_stack();
   __ call_VM(noreg,
              CAST_FROM_FN_PTR(address,
                               InterpreterRuntime::
                               throw_ClassCastException),
              c_rarg1);
   return entry;
 }
 address TemplateInterpreterGenerator::generate_exception_handler_common(
         const char* name, const char* message, bool pass_oop) {
   assert(!pass_oop || message == NULL, "either oop or message but not both");
   address entry = __ pc();
   if (pass_oop) {
     // object is at TOS
     __ pop(c_rarg2);
   }
   // expression stack must be empty before entering the VM if an
   // exception happened
   __ empty_expression_stack();
   // setup parameters
   __ lea(c_rarg1, ExternalAddress((address)name));
   if (pass_oop) {
     __ call_VM(rax, CAST_FROM_FN_PTR(address,
                                      InterpreterRuntime::
                                      create_klass_exception),
                c_rarg1, c_rarg2);
   } else {
     // kind of lame ExternalAddress can't take NULL because
     // external_word_Relocation will assert.
     if (message != NULL) {
       __ lea(c_rarg2, ExternalAddress((address)message));
     } else {
       __ movptr(c_rarg2, NULL_WORD);
     }
     __ call_VM(rax,
                CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception),
                c_rarg1, c_rarg2);
   }
   // throw exception
   __ jump(ExternalAddress(Interpreter::throw_exception_entry()));
   return entry;
 }
 address TemplateInterpreterGenerator::generate_continuation_for(TosState state) {
   address entry = __ pc();
   // NULL last_sp until next java call
   __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
   __ dispatch_next(state);
   return entry;
 }
 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step) {
   address entry = __ pc();
   // Restore stack bottom in case i2c adjusted stack
   __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
   // and NULL it as marker that esp is now tos until next java call
   __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
   __ restore_bcp();
   __ restore_locals();
   Label L_got_cache, L_giant_index;
   if (EnableInvokeDynamic) {
     __ cmpb(Address(r13, 0), Bytecodes::_invokedynamic);
     __ jcc(Assembler::equal, L_giant_index);
   }
   __ get_cache_and_index_at_bcp(rbx, rcx, 1, sizeof(u2));
   __ bind(L_got_cache);
   __ movl(rbx, Address(rbx, rcx,
                        Address::times_ptr,
                        in_bytes(ConstantPoolCache::base_offset()) +
 * wordSize));
   __ andl(rbx, 0xFF);
   __ lea(rsp, Address(rsp, rbx, Address::times_8));
   __ dispatch_next(state, step);
   // out of the main line of code...
   if (EnableInvokeDynamic) {
     __ bind(L_giant_index);
     __ get_cache_and_index_at_bcp(rbx, rcx, 1, sizeof(u4));
     __ jmp(L_got_cache);
   }
   return entry;
 }
 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state,
                                                                int step) {
   address entry = __ pc();
   // NULL last_sp until next java call
   __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
   __ restore_bcp();
   __ restore_locals();
   // handle exceptions
   {
     Label L;
     __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
     __ jcc(Assembler::zero, L);
     __ call_VM(noreg,
                CAST_FROM_FN_PTR(address,
                                 InterpreterRuntime::throw_pending_exception));
     __ should_not_reach_here();
     __ bind(L);
   }
   __ dispatch_next(state, step);
   return entry;
 }
 int AbstractInterpreter::BasicType_as_index(BasicType type) {
   int i = 0;
   switch (type) {
     case T_BOOLEAN: i = 0; break;
     case T_CHAR   : i = 1; break;
     case T_BYTE   : i = 2; break;
     case T_SHORT  : i = 3; break;
     case T_INT    : i = 4; break;
     case T_LONG   : i = 5; break;
     case T_VOID   : i = 6; break;
     case T_FLOAT  : i = 7; break;
     case T_DOUBLE : i = 8; break;
     case T_OBJECT : i = 9; break;
     case T_ARRAY  : i = 9; break;
     default       : ShouldNotReachHere();
   }
   assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers,
          "index out of bounds");
   return i;
 }
 address TemplateInterpreterGenerator::generate_result_handler_for(
         BasicType type) {
   address entry = __ pc();
   switch (type) {
   case T_BOOLEAN: __ c2bool(rax);            break;
   case T_CHAR   : __ movzwl(rax, rax);       break;
   case T_BYTE   : __ sign_extend_byte(rax);  break;
   case T_SHORT  : __ sign_extend_short(rax); break;
   case T_INT    : /* nothing to do */        break;
   case T_LONG   : /* nothing to do */        break;
   case T_VOID   : /* nothing to do */        break;
   case T_FLOAT  : /* nothing to do */        break;
   case T_DOUBLE : /* nothing to do */        break;
   case T_OBJECT :
     // retrieve result from frame
     __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize));
     // and verify it
     __ verify_oop(rax);
     break;
   default       : ShouldNotReachHere();
   }
   __ ret(0);                                   // return from result handler
   return entry;
 }
 address TemplateInterpreterGenerator::generate_safept_entry_for(
         TosState state,
         address runtime_entry) {
   address entry = __ pc();
   __ push(state);
   __ call_VM(noreg, runtime_entry);
   __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
   return entry;
 }
 // Helpers for commoning out cases in the various type of method entries.
 //
 // increment invocation count & check for overflow
 //
 // Note: checking for negative value instead of overflow
 //       so we have a 'sticky' overflow test
 //
 // rbx: method
 // ecx: invocation counter
 //
 void InterpreterGenerator::generate_counter_incr(
         Label* overflow,
         Label* profile_method,
         Label* profile_method_continue) {
   Label done;
   // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not.
   if (TieredCompilation) {
     int increment = InvocationCounter::count_increment;
     int mask = ((1 << Tier0InvokeNotifyFreqLog)  - 1) << InvocationCounter::count_shift;
     Label no_mdo;
     if (ProfileInterpreter) {
       // Are we profiling?
       __ movptr(rax, Address(rbx, Method::method_data_offset()));
       __ testptr(rax, rax);
       __ jccb(Assembler::zero, no_mdo);
       // Increment counter in the MDO
       const Address mdo_invocation_counter(rax, in_bytes(MethodData::invocation_counter_offset()) +
                                                 in_bytes(InvocationCounter::counter_offset()));
       __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rcx, false, Assembler::zero, overflow);
       __ jmp(done);
     }
     __ bind(no_mdo);
     // Increment counter in MethodCounters
     const Address invocation_counter(rax,
                   MethodCounters::invocation_counter_offset() +
                   InvocationCounter::counter_offset());
     __ get_method_counters(rbx, rax, done);
     __ increment_mask_and_jump(invocation_counter, increment, mask, rcx,
                                false, Assembler::zero, overflow);
     __ bind(done);
   } else {
     const Address backedge_counter(rax,
                   MethodCounters::backedge_counter_offset() +
                   InvocationCounter::counter_offset());
     const Address invocation_counter(rax,
                   MethodCounters::invocation_counter_offset() +
                   InvocationCounter::counter_offset());
     __ get_method_counters(rbx, rax, done);
     if (ProfileInterpreter) {
       __ incrementl(Address(rax,
               MethodCounters::interpreter_invocation_counter_offset()));
     }
     // Update standard invocation counters
     __ movl(rcx, invocation_counter);
     __ incrementl(rcx, InvocationCounter::count_increment);
     __ movl(invocation_counter, rcx); // save invocation count
     __ movl(rax, backedge_counter);   // load backedge counter
     __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits
     __ addl(rcx, rax);                // add both counters
     // profile_method is non-null only for interpreted method so
     // profile_method != NULL == !native_call
     if (ProfileInterpreter && profile_method != NULL) {
       // Test to see if we should create a method data oop
       __ cmp32(rcx, ExternalAddress((address)&InvocationCounter::InterpreterProfileLimit));
       __ jcc(Assembler::less, *profile_method_continue);
       // if no method data exists, go to profile_method
       __ test_method_data_pointer(rax, *profile_method);
     }
     __ cmp32(rcx, ExternalAddress((address)&InvocationCounter::InterpreterInvocationLimit));
     __ jcc(Assembler::aboveEqual, *overflow);
     __ bind(done);
   }
 }
 void InterpreterGenerator::generate_counter_overflow(Label* do_continue) {
   // Asm interpreter on entry
   // r14 - locals
   // r13 - bcp
   // rbx - method
   // edx - cpool --- DOES NOT APPEAR TO BE TRUE
   // rbp - interpreter frame
   // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
   // Everything as it was on entry
   // rdx is not restored. Doesn't appear to really be set.
   // InterpreterRuntime::frequency_counter_overflow takes two
   // arguments, the first (thread) is passed by call_VM, the second
   // indicates if the counter overflow occurs at a backwards branch
   // (NULL bcp).  We pass zero for it.  The call returns the address
   // of the verified entry point for the method or NULL if the
   // compilation did not complete (either went background or bailed
   // out).
   __ movl(c_rarg1, 0);
   __ call_VM(noreg,
              CAST_FROM_FN_PTR(address,
                               InterpreterRuntime::frequency_counter_overflow),
              c_rarg1);
   __ movptr(rbx, Address(rbp, method_offset));   // restore Method*
   // Preserve invariant that r13/r14 contain bcp/locals of sender frame
   // and jump to the interpreted entry.
   __ jmp(*do_continue, relocInfo::none);
 }
 // See if we've got enough room on the stack for locals plus overhead.
 // The expression stack grows down incrementally, so the normal guard
 // page mechanism will work for that.
 //
 // NOTE: Since the additional locals are also always pushed (wasn't
 // obvious in generate_method_entry) so the guard should work for them
 // too.
 //
 // Args:
 //      rdx: number of additional locals this frame needs (what we must check)
 //      rbx: Method*
 //
 // Kills:
 //      rax
 void InterpreterGenerator::generate_stack_overflow_check(void) {
   // monitor entry size: see picture of stack set
   // (generate_method_entry) and frame_amd64.hpp
   const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
   // total overhead size: entry_size + (saved rbp through expr stack
   // bottom).  be sure to change this if you add/subtract anything
   // to/from the overhead area
   const int overhead_size =
     -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size;
   const int page_size = os::vm_page_size();
   Label after_frame_check;
   // see if the frame is greater than one page in size. If so,
   // then we need to verify there is enough stack space remaining
   // for the additional locals.
   __ cmpl(rdx, (page_size - overhead_size) / Interpreter::stackElementSize);
   __ jcc(Assembler::belowEqual, after_frame_check);
   // compute rsp as if this were going to be the last frame on
   // the stack before the red zone
   const Address stack_base(r15_thread, Thread::stack_base_offset());
   const Address stack_size(r15_thread, Thread::stack_size_offset());
   // locals + overhead, in bytes
   __ mov(rax, rdx);
   __ shlptr(rax, Interpreter::logStackElementSize);  // 2 slots per parameter.
   __ addptr(rax, overhead_size);
 #ifdef ASSERT
   Label stack_base_okay, stack_size_okay;
   // verify that thread stack base is non-zero
   __ cmpptr(stack_base, (int32_t)NULL_WORD);
   __ jcc(Assembler::notEqual, stack_base_okay);
   __ stop("stack base is zero");
   __ bind(stack_base_okay);
   // verify that thread stack size is non-zero
   __ cmpptr(stack_size, 0);
   __ jcc(Assembler::notEqual, stack_size_okay);
   __ stop("stack size is zero");
   __ bind(stack_size_okay);
 #endif
   // Add stack base to locals and subtract stack size
   __ addptr(rax, stack_base);
   __ subptr(rax, stack_size);
   // Use the maximum number of pages we might bang.
   const int max_pages = StackShadowPages > (StackRedPages+StackYellowPages) ? StackShadowPages :
                                                                               (StackRedPages+StackYellowPages);
   // add in the red and yellow zone sizes
   __ addptr(rax, max_pages * page_size);
   // check against the current stack bottom
   __ cmpptr(rsp, rax);
   __ jcc(Assembler::above, after_frame_check);
   // Restore sender's sp as SP. This is necessary if the sender's
   // frame is an extended compiled frame (see gen_c2i_adapter())
   // and safer anyway in case of JSR292 adaptations.
   __ pop(rax); // return address must be moved if SP is changed
   __ mov(rsp, r13);
   __ push(rax);
   // Note: the restored frame is not necessarily interpreted.
   // Use the shared runtime version of the StackOverflowError.
   assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated");
   __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry()));
   // all done with frame size check
   __ bind(after_frame_check);
 }
 // Allocate monitor and lock method (asm interpreter)
 //
 // Args:
 //      rbx: Method*
 //      r14: locals
 //
 // Kills:
 //      rax
 //      c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs)
 //      rscratch1, rscratch2 (scratch regs)
 void InterpreterGenerator::lock_method(void) {
   // synchronize method
   const Address access_flags(rbx, Method::access_flags_offset());
   const Address monitor_block_top(
         rbp,
         frame::interpreter_frame_monitor_block_top_offset * wordSize);
   const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
 #ifdef ASSERT
   {
     Label L;
     __ movl(rax, access_flags);
     __ testl(rax, JVM_ACC_SYNCHRONIZED);
     __ jcc(Assembler::notZero, L);
     __ stop("method doesn't need synchronization");
     __ bind(L);
   }
 #endif // ASSERT
   // get synchronization object
   {
     const int mirror_offset = in_bytes(Klass::java_mirror_offset());
     Label done;
     __ movl(rax, access_flags);
     __ testl(rax, JVM_ACC_STATIC);
     // get receiver (assume this is frequent case)
     __ movptr(rax, Address(r14, Interpreter::local_offset_in_bytes(0)));
     __ jcc(Assembler::zero, done);
     __ movptr(rax, Address(rbx, Method::const_offset()));
     __ movptr(rax, Address(rax, ConstMethod::constants_offset()));
     __ movptr(rax, Address(rax,
                            ConstantPool::pool_holder_offset_in_bytes()));
     __ movptr(rax, Address(rax, mirror_offset));
 #ifdef ASSERT
     {
       Label L;
       __ testptr(rax, rax);
       __ jcc(Assembler::notZero, L);
       __ stop("synchronization object is NULL");
       __ bind(L);
     }
 #endif // ASSERT
     __ bind(done);
   }
   // add space for monitor & lock
   __ subptr(rsp, entry_size); // add space for a monitor entry
   __ movptr(monitor_block_top, rsp);  // set new monitor block top
   // store object
   __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax);
   __ movptr(c_rarg1, rsp); // object address
   __ lock_object(c_rarg1);
 }
 // Generate a fixed interpreter frame. This is identical setup for
 // interpreted methods and for native methods hence the shared code.
 //
 // Args:
 //      rax: return address
 //      rbx: Method*
 //      r14: pointer to locals
 //      r13: sender sp
 //      rdx: cp cache
 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
   // initialize fixed part of activation frame
   __ push(rax);        // save return address
   __ enter();          // save old & set new rbp
   __ push(r13);        // set sender sp
   __ push((int)NULL_WORD); // leave last_sp as null
   __ movptr(r13, Address(rbx, Method::const_offset()));      // get ConstMethod*
   __ lea(r13, Address(r13, ConstMethod::codes_offset())); // get codebase
   __ push(rbx);        // save Method*
   if (ProfileInterpreter) {
     Label method_data_continue;
     __ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset())));
     __ testptr(rdx, rdx);
     __ jcc(Assembler::zero, method_data_continue);
     __ addptr(rdx, in_bytes(MethodData::data_offset()));
     __ bind(method_data_continue);
     __ push(rdx);      // set the mdp (method data pointer)
   } else {
     __ push(0);
   }
   __ movptr(rdx, Address(rbx, Method::const_offset()));
   __ movptr(rdx, Address(rdx, ConstMethod::constants_offset()));
   __ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes()));
   __ push(rdx); // set constant pool cache
   __ push(r14); // set locals pointer
   if (native_call) {
     __ push(0); // no bcp
   } else {
     __ push(r13); // set bcp
   }
   __ push(0); // reserve word for pointer to expression stack bottom
   __ movptr(Address(rsp, 0), rsp); // set expression stack bottom
 }
 // End of helpers
 // Various method entries
 //------------------------------------------------------------------------------------------------------------------------
 //
 //
 // Call an accessor method (assuming it is resolved, otherwise drop
 // into vanilla (slow path) entry
 address InterpreterGenerator::generate_accessor_entry(void) {
   // rbx: Method*
   // r13: senderSP must preserver for slow path, set SP to it on fast path
   address entry_point = __ pc();
   Label xreturn_path;
   // do fastpath for resolved accessor methods
   if (UseFastAccessorMethods) {
     // Code: _aload_0, _(i|a)getfield, _(i|a)return or any rewrites
     //       thereof; parameter size = 1
     // Note: We can only use this code if the getfield has been resolved
     //       and if we don't have a null-pointer exception => check for
     //       these conditions first and use slow path if necessary.
     Label slow_path;
     // If we need a safepoint check, generate full interpreter entry.
     __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
              SafepointSynchronize::_not_synchronized);
     __ jcc(Assembler::notEqual, slow_path);
     // rbx: method
     __ movptr(rax, Address(rsp, wordSize));
     // check if local 0 != NULL and read field
     __ testptr(rax, rax);
     __ jcc(Assembler::zero, slow_path);
     // read first instruction word and extract bytecode @ 1 and index @ 2
     __ movptr(rdx, Address(rbx, Method::const_offset()));
     __ movptr(rdi, Address(rdx, ConstMethod::constants_offset()));
     __ movl(rdx, Address(rdx, ConstMethod::codes_offset()));
     // Shift codes right to get the index on the right.
     // The bytecode fetched looks like <index><0xb4><0x2a>
     __ shrl(rdx, 2 * BitsPerByte);
     __ shll(rdx, exact_log2(in_words(ConstantPoolCacheEntry::size())));
     __ movptr(rdi, Address(rdi, ConstantPool::cache_offset_in_bytes()));
     // rax: local 0
     // rbx: method
     // rdx: constant pool cache index
     // rdi: constant pool cache
     // check if getfield has been resolved and read constant pool cache entry
     // check the validity of the cache entry by testing whether _indices field
     // contains Bytecode::_getfield in b1 byte.
     assert(in_words(ConstantPoolCacheEntry::size()) == 4,
            "adjust shift below");
     __ movl(rcx,
             Address(rdi,
                     rdx,
                     Address::times_8,
                     ConstantPoolCache::base_offset() +
                     ConstantPoolCacheEntry::indices_offset()));
     __ shrl(rcx, 2 * BitsPerByte);
     __ andl(rcx, 0xFF);
     __ cmpl(rcx, Bytecodes::_getfield);
     __ jcc(Assembler::notEqual, slow_path);
     // Note: constant pool entry is not valid before bytecode is resolved
     __ movptr(rcx,
               Address(rdi,
                       rdx,
                       Address::times_8,
                       ConstantPoolCache::base_offset() +
                       ConstantPoolCacheEntry::f2_offset()));
     // edx: flags
     __ movl(rdx,
             Address(rdi,
                     rdx,
                     Address::times_8,
                     ConstantPoolCache::base_offset() +
                     ConstantPoolCacheEntry::flags_offset()));
     Label notObj, notInt, notByte, notShort;
     const Address field_address(rax, rcx, Address::times_1);
     // Need to differentiate between igetfield, agetfield, bgetfield etc.
     // because they are different sizes.
     // Use the type from the constant pool cache
     __ shrl(rdx, ConstantPoolCacheEntry::tos_state_shift);
     // Make sure we don't need to mask edx after the above shift
     ConstantPoolCacheEntry::verify_tos_state_shift();
     __ cmpl(rdx, atos);
     __ jcc(Assembler::notEqual, notObj);
     // atos
     __ load_heap_oop(rax, field_address);
     __ jmp(xreturn_path);
     __ bind(notObj);
     __ cmpl(rdx, itos);
     __ jcc(Assembler::notEqual, notInt);
     // itos
     __ movl(rax, field_address);
     __ jmp(xreturn_path);
     __ bind(notInt);
     __ cmpl(rdx, btos);
     __ jcc(Assembler::notEqual, notByte);
     // btos
     __ load_signed_byte(rax, field_address);
     __ jmp(xreturn_path);
     __ bind(notByte);
     __ cmpl(rdx, stos);
     __ jcc(Assembler::notEqual, notShort);
     // stos
     __ load_signed_short(rax, field_address);
     __ jmp(xreturn_path);
     __ bind(notShort);
 #ifdef ASSERT
     Label okay;
     __ cmpl(rdx, ctos);
     __ jcc(Assembler::equal, okay);
     __ stop("what type is this?");
     __ bind(okay);
 #endif
     // ctos
     __ load_unsigned_short(rax, field_address);
     __ bind(xreturn_path);
     // _ireturn/_areturn
     __ pop(rdi);
     __ mov(rsp, r13);
     __ jmp(rdi);
     __ ret(0);
     // generate a vanilla interpreter entry as the slow path
     __ bind(slow_path);
     (void) generate_normal_entry(false);
   } else {
     (void) generate_normal_entry(false);
   }
   return entry_point;
 }
 // Method entry for java.lang.ref.Reference.get.
 address InterpreterGenerator::generate_Reference_get_entry(void) {
 #if INCLUDE_ALL_GCS
   // Code: _aload_0, _getfield, _areturn
   // parameter size = 1
   //
   // The code that gets generated by this routine is split into 2 parts:
   //    1. The "intrinsified" code for G1 (or any SATB based GC),
   //    2. The slow path - which is an expansion of the regular method entry.
   //
   // Notes:-
   // * In the G1 code we do not check whether we need to block for
   //   a safepoint. If G1 is enabled then we must execute the specialized
   //   code for Reference.get (except when the Reference object is null)
   //   so that we can log the value in the referent field with an SATB
   //   update buffer.
   //   If the code for the getfield template is modified so that the
   //   G1 pre-barrier code is executed when the current method is
   //   Reference.get() then going through the normal method entry
   //   will be fine.
   // * The G1 code can, however, check the receiver object (the instance
   //   of java.lang.Reference) and jump to the slow path if null. If the
   //   Reference object is null then we obviously cannot fetch the referent
   //   and so we don't need to call the G1 pre-barrier. Thus we can use the
   //   regular method entry code to generate the NPE.
   //
   // This code is based on generate_accessor_enty.
   //
   // rbx: Method*
   // r13: senderSP must preserve for slow path, set SP to it on fast path
   address entry = __ pc();
   const int referent_offset = java_lang_ref_Reference::referent_offset;
   guarantee(referent_offset > 0, "referent offset not initialized");
   if (UseG1GC) {
     Label slow_path;
     // rbx: method
     // Check if local 0 != NULL
     // If the receiver is null then it is OK to jump to the slow path.
     __ movptr(rax, Address(rsp, wordSize));
     __ testptr(rax, rax);
     __ jcc(Assembler::zero, slow_path);
     // rax: local 0
     // rbx: method (but can be used as scratch now)
     // rdx: scratch
     // rdi: scratch
     // Generate the G1 pre-barrier code to log the value of
     // the referent field in an SATB buffer.
     // Load the value of the referent field.
     const Address field_address(rax, referent_offset);
     __ load_heap_oop(rax, field_address);
     // Generate the G1 pre-barrier code to log the value of
     // the referent field in an SATB buffer.
     __ g1_write_barrier_pre(noreg /* obj */,
                             rax /* pre_val */,
                             r15_thread /* thread */,
                             rbx /* tmp */,
                             true /* tosca_live */,
                             true /* expand_call */);
     // _areturn
     __ pop(rdi);                // get return address
     __ mov(rsp, r13);           // set sp to sender sp
     __ jmp(rdi);
     __ ret(0);
     // generate a vanilla interpreter entry as the slow path
     __ bind(slow_path);
     (void) generate_normal_entry(false);
     return entry;
   }
 #endif // INCLUDE_ALL_GCS
   // If G1 is not enabled then attempt to go through the accessor entry point
   // Reference.get is an accessor
   return generate_accessor_entry();
 }
 // Interpreter stub for calling a native method. (asm interpreter)
 // This sets up a somewhat different looking stack for calling the
 // native method than the typical interpreter frame setup.
 address InterpreterGenerator::generate_native_entry(bool synchronized) {
   // determine code generation flags
   bool inc_counter  = UseCompiler || CountCompiledCalls;
   // rbx: Method*
   // r13: sender sp
   address entry_point = __ pc();
   const Address constMethod       (rbx, Method::const_offset());
   const Address access_flags      (rbx, Method::access_flags_offset());
   const Address size_of_parameters(rcx, ConstMethod::
                                         size_of_parameters_offset());
   // get parameter size (always needed)
   __ movptr(rcx, constMethod);
   __ load_unsigned_short(rcx, size_of_parameters);
   // native calls don't need the stack size check since they have no
   // expression stack and the arguments are already on the stack and
   // we only add a handful of words to the stack
   // rbx: Method*
   // rcx: size of parameters
   // r13: sender sp
   __ pop(rax);                                       // get return address
   // for natives the size of locals is zero
   // compute beginning of parameters (r14)
   __ lea(r14, Address(rsp, rcx, Address::times_8, -wordSize));
   // add 2 zero-initialized slots for native calls
   // initialize result_handler slot
   __ push((int) NULL_WORD);
   // slot for oop temp
   // (static native method holder mirror/jni oop result)
   __ push((int) NULL_WORD);
   // initialize fixed part of activation frame
   generate_fixed_frame(true);
   // make sure method is native & not abstract
 #ifdef ASSERT
   __ movl(rax, access_flags);
   {
     Label L;
     __ testl(rax, JVM_ACC_NATIVE);
     __ jcc(Assembler::notZero, L);
     __ stop("tried to execute non-native method as native");
     __ bind(L);
   }
   {
     Label L;
     __ testl(rax, JVM_ACC_ABSTRACT);
     __ jcc(Assembler::zero, L);
     __ stop("tried to execute abstract method in interpreter");
     __ bind(L);
   }
 #endif
   // Since at this point in the method invocation the exception handler
   // would try to exit the monitor of synchronized methods which hasn't
   // been entered yet, we set the thread local variable
   // _do_not_unlock_if_synchronized to true. The remove_activation will
   // check this flag.
   const Address do_not_unlock_if_synchronized(r15_thread,
         in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
   __ movbool(do_not_unlock_if_synchronized, true);
   // increment invocation count & check for overflow
   Label invocation_counter_overflow;
   if (inc_counter) {
     generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
   }
   Label continue_after_compile;
   __ bind(continue_after_compile);
   bang_stack_shadow_pages(true);
   // reset the _do_not_unlock_if_synchronized flag
   __ movbool(do_not_unlock_if_synchronized, false);
   // check for synchronized methods
   // Must happen AFTER invocation_counter check and stack overflow check,
   // so method is not locked if overflows.
   if (synchronized) {
     lock_method();
   } else {
     // no synchronization necessary
 #ifdef ASSERT
     {
       Label L;
       __ movl(rax, access_flags);
       __ testl(rax, JVM_ACC_SYNCHRONIZED);
       __ jcc(Assembler::zero, L);
       __ stop("method needs synchronization");
       __ bind(L);
     }
 #endif
   }
   // start execution
 #ifdef ASSERT
   {
     Label L;
     const Address monitor_block_top(rbp,
                  frame::interpreter_frame_monitor_block_top_offset * wordSize);
     __ movptr(rax, monitor_block_top);
     __ cmpptr(rax, rsp);
     __ jcc(Assembler::equal, L);
     __ stop("broken stack frame setup in interpreter");
     __ bind(L);
   }
 #endif
   // jvmti support
   __ notify_method_entry();
   // work registers
   const Register method = rbx;
   const Register t      = r11;
   // allocate space for parameters
   __ get_method(method);
   __ movptr(t, Address(method, Method::const_offset()));
   __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset()));
   __ shll(t, Interpreter::logStackElementSize);
   __ subptr(rsp, t);
   __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
   __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI)
   // get signature handler
   {
     Label L;
     __ movptr(t, Address(method, Method::signature_handler_offset()));
     __ testptr(t, t);
     __ jcc(Assembler::notZero, L);
     __ call_VM(noreg,
                CAST_FROM_FN_PTR(address,
                                 InterpreterRuntime::prepare_native_call),
                method);
     __ get_method(method);
     __ movptr(t, Address(method, Method::signature_handler_offset()));
     __ bind(L);
   }
   // call signature handler
   assert(InterpreterRuntime::SignatureHandlerGenerator::from() == r14,
          "adjust this code");
   assert(InterpreterRuntime::SignatureHandlerGenerator::to() == rsp,
          "adjust this code");
   assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == rscratch1,
           "adjust this code");
   // The generated handlers do not touch RBX (the method oop).
   // However, large signatures cannot be cached and are generated
   // each time here.  The slow-path generator can do a GC on return,
   // so we must reload it after the call.
   __ call(t);
   __ get_method(method);        // slow path can do a GC, reload RBX
   // result handler is in rax
   // set result handler
   __ movptr(Address(rbp,
                     (frame::interpreter_frame_result_handler_offset) * wordSize),
             rax);
   // pass mirror handle if static call
   {
     Label L;
     const int mirror_offset = in_bytes(Klass::java_mirror_offset());
     __ movl(t, Address(method, Method::access_flags_offset()));
     __ testl(t, JVM_ACC_STATIC);
     __ jcc(Assembler::zero, L);
     // get mirror
     __ movptr(t, Address(method, Method::const_offset()));
     __ movptr(t, Address(t, ConstMethod::constants_offset()));
     __ movptr(t, Address(t, ConstantPool::pool_holder_offset_in_bytes()));
     __ movptr(t, Address(t, mirror_offset));
     // copy mirror into activation frame
     __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize),
             t);
     // pass handle to mirror
     __ lea(c_rarg1,
            Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
     __ bind(L);
   }
   // get native function entry point
   {
     Label L;
     __ movptr(rax, Address(method, Method::native_function_offset()));
     ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
     __ movptr(rscratch2, unsatisfied.addr());
     __ cmpptr(rax, rscratch2);
     __ jcc(Assembler::notEqual, L);
     __ call_VM(noreg,
                CAST_FROM_FN_PTR(address,
                                 InterpreterRuntime::prepare_native_call),
                method);
     __ get_method(method);
     __ movptr(rax, Address(method, Method::native_function_offset()));
     __ bind(L);
   }
   // pass JNIEnv
   __ lea(c_rarg0, Address(r15_thread, JavaThread::jni_environment_offset()));
   // It is enough that the pc() points into the right code
   // segment. It does not have to be the correct return pc.
   __ set_last_Java_frame(rsp, rbp, (address) __ pc());
   // change thread state
 #ifdef ASSERT
   {
     Label L;
     __ movl(t, Address(r15_thread, JavaThread::thread_state_offset()));
     __ cmpl(t, _thread_in_Java);
     __ jcc(Assembler::equal, L);
     __ stop("Wrong thread state in native stub");
     __ bind(L);
   }
 #endif
   // Change state to native
   __ movl(Address(r15_thread, JavaThread::thread_state_offset()),
           _thread_in_native);
   // Call the native method.
   __ call(rax);
   // result potentially in rax or xmm0
   // Verify or restore cpu control state after JNI call
   __ restore_cpu_control_state_after_jni();
   // NOTE: The order of these pushes is known to frame::interpreter_frame_result
   // in order to extract the result of a method call. If the order of these
   // pushes change or anything else is added to the stack then the code in
   // interpreter_frame_result must also change.
   __ push(dtos);
   __ push(ltos);
   // change thread state
   __ movl(Address(r15_thread, JavaThread::thread_state_offset()),
           _thread_in_native_trans);
   if (os::is_MP()) {
     if (UseMembar) {
       // Force this write out before the read below
       __ membar(Assembler::Membar_mask_bits(
            Assembler::LoadLoad | Assembler::LoadStore |
            Assembler::StoreLoad | Assembler::StoreStore));
     } else {
       // Write serialization page so VM thread can do a pseudo remote membar.
       // We use the current thread pointer to calculate a thread specific
       // offset to write to within the page. This minimizes bus traffic
       // due to cache line collision.
       __ serialize_memory(r15_thread, rscratch2);
     }
   }
   // check for safepoint operation in progress and/or pending suspend requests
   {
     Label Continue;
     __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
              SafepointSynchronize::_not_synchronized);
     Label L;
     __ jcc(Assembler::notEqual, L);
     __ cmpl(Address(r15_thread, JavaThread::suspend_flags_offset()), 0);
     __ jcc(Assembler::equal, Continue);
     __ bind(L);
     // Don't use call_VM as it will see a possible pending exception
     // and forward it and never return here preventing us from
     // clearing _last_native_pc down below.  Also can't use
     // call_VM_leaf either as it will check to see if r13 & r14 are
     // preserved and correspond to the bcp/locals pointers. So we do a
     // runtime call by hand.
     //
     __ mov(c_rarg0, r15_thread);
     __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
     __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
     __ andptr(rsp, -16); // align stack as required by ABI
     __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans)));
     __ mov(rsp, r12); // restore sp
     __ reinit_heapbase();
     __ bind(Continue);
   }
   // change thread state
   __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_Java);
   // reset_last_Java_frame
   __ reset_last_Java_frame(true, true);
   // reset handle block
   __ movptr(t, Address(r15_thread, JavaThread::active_handles_offset()));
   __ movptr(Address(t, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD);
   // If result is an oop unbox and store it in frame where gc will see it
   // and result handler will pick it up
   {
     Label no_oop, store_result;
     __ lea(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT)));
     __ cmpptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize));
     __ jcc(Assembler::notEqual, no_oop);
     // retrieve result
     __ pop(ltos);
     __ testptr(rax, rax);
     __ jcc(Assembler::zero, store_result);
     __ movptr(rax, Address(rax, 0));
     __ bind(store_result);
     __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize), rax);
     // keep stack depth as expected by pushing oop which will eventually be discarde
     __ push(ltos);
     __ bind(no_oop);
   }
   {
     Label no_reguard;
     __ cmpl(Address(r15_thread, JavaThread::stack_guard_state_offset()),
             JavaThread::stack_guard_yellow_disabled);
     __ jcc(Assembler::notEqual, no_reguard);
     __ pusha(); // XXX only save smashed registers
     __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
     __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
     __ andptr(rsp, -16); // align stack as required by ABI
     __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
     __ mov(rsp, r12); // restore sp
     __ popa(); // XXX only restore smashed registers
     __ reinit_heapbase();
     __ bind(no_reguard);
   }
   // The method register is junk from after the thread_in_native transition
   // until here.  Also can't call_VM until the bcp has been
   // restored.  Need bcp for throwing exception below so get it now.
   __ get_method(method);
   // restore r13 to have legal interpreter frame, i.e., bci == 0 <=>
   // r13 == code_base()
   __ movptr(r13, Address(method, Method::const_offset()));   // get ConstMethod*
   __ lea(r13, Address(r13, ConstMethod::codes_offset()));    // get codebase
   // handle exceptions (exception handling will handle unlocking!)
   {
     Label L;
     __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
     __ jcc(Assembler::zero, L);
     // Note: At some point we may want to unify this with the code
     // used in call_VM_base(); i.e., we should use the
     // StubRoutines::forward_exception code. For now this doesn't work
     // here because the rsp is not correctly set at this point.
     __ MacroAssembler::call_VM(noreg,
                                CAST_FROM_FN_PTR(address,
                                InterpreterRuntime::throw_pending_exception));
     __ should_not_reach_here();
     __ bind(L);
   }
   // do unlocking if necessary
   {
     Label L;
     __ movl(t, Address(method, Method::access_flags_offset()));
     __ testl(t, JVM_ACC_SYNCHRONIZED);
     __ jcc(Assembler::zero, L);
     // the code below should be shared with interpreter macro
     // assembler implementation
     {
       Label unlock;
       // BasicObjectLock will be first in list, since this is a
       // synchronized method. However, need to check that the object
       // has not been unlocked by an explicit monitorexit bytecode.
       const Address monitor(rbp,
                             (intptr_t)(frame::interpreter_frame_initial_sp_offset *
                                        wordSize - sizeof(BasicObjectLock)));
       // monitor expect in c_rarg1 for slow unlock path
       __ lea(c_rarg1, monitor); // address of first monitor
       __ movptr(t, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()));
       __ testptr(t, t);
       __ jcc(Assembler::notZero, unlock);
       // Entry already unlocked, need to throw exception
       __ MacroAssembler::call_VM(noreg,
                                  CAST_FROM_FN_PTR(address,
                    InterpreterRuntime::throw_illegal_monitor_state_exception));
       __ should_not_reach_here();
       __ bind(unlock);
       __ unlock_object(c_rarg1);
     }
     __ bind(L);
   }
   // jvmti support
   // Note: This must happen _after_ handling/throwing any exceptions since
   //       the exception handler code notifies the runtime of method exits
   //       too. If this happens before, method entry/exit notifications are
   //       not properly paired (was bug - gri 11/22/99).
   __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
   // restore potential result in edx:eax, call result handler to
   // restore potential result in ST0 & handle result
   __ pop(ltos);
   __ pop(dtos);
   __ movptr(t, Address(rbp,
                        (frame::interpreter_frame_result_handler_offset) * wordSize));
   __ call(t);
   // remove activation
   __ movptr(t, Address(rbp,
                        frame::interpreter_frame_sender_sp_offset *
                        wordSize)); // get sender sp
   __ leave();                                // remove frame anchor
   __ pop(rdi);                               // get return address
   __ mov(rsp, t);                            // set sp to sender sp
   __ jmp(rdi);
   if (inc_counter) {
     // Handle overflow of counter and compile method
     __ bind(invocation_counter_overflow);
     generate_counter_overflow(&continue_after_compile);
   }
   return entry_point;
 }
 //
 // Generic interpreted method entry to (asm) interpreter
 //
 address InterpreterGenerator::generate_normal_entry(bool synchronized) {
   // determine code generation flags
   bool inc_counter  = UseCompiler || CountCompiledCalls;
   // ebx: Method*
   // r13: sender sp
   address entry_point = __ pc();
   const Address constMethod(rbx, Method::const_offset());
   const Address access_flags(rbx, Method::access_flags_offset());
   const Address size_of_parameters(rdx,
                                    ConstMethod::size_of_parameters_offset());
   const Address size_of_locals(rdx, ConstMethod::size_of_locals_offset());
   // get parameter size (always needed)
   __ movptr(rdx, constMethod);
   __ load_unsigned_short(rcx, size_of_parameters);
   // rbx: Method*
   // rcx: size of parameters
   // r13: sender_sp (could differ from sp+wordSize if we were called via c2i )
   __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words
   __ subl(rdx, rcx); // rdx = no. of additional locals
   // YYY
 //   __ incrementl(rdx);
 //   __ andl(rdx, -2);
   // see if we've got enough room on the stack for locals plus overhead.
   generate_stack_overflow_check();
   // get return address
   __ pop(rax);
   // compute beginning of parameters (r14)
   __ lea(r14, Address(rsp, rcx, Address::times_8, -wordSize));
   // rdx - # of additional locals
   // allocate space for locals
   // explicitly initialize locals
   {
     Label exit, loop;
     __ testl(rdx, rdx);
     __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0
     __ bind(loop);
     __ push((int) NULL_WORD); // initialize local variables
     __ decrementl(rdx); // until everything initialized
     __ jcc(Assembler::greater, loop);
     __ bind(exit);
   }
   // initialize fixed part of activation frame
   generate_fixed_frame(false);
   // make sure method is not native & not abstract
 #ifdef ASSERT
   __ movl(rax, access_flags);
   {
     Label L;
     __ testl(rax, JVM_ACC_NATIVE);
     __ jcc(Assembler::zero, L);
     __ stop("tried to execute native method as non-native");
     __ bind(L);
   }
   {
     Label L;
     __ testl(rax, JVM_ACC_ABSTRACT);
     __ jcc(Assembler::zero, L);
     __ stop("tried to execute abstract method in interpreter");
     __ bind(L);
   }
 #endif
   // Since at this point in the method invocation the exception
   // handler would try to exit the monitor of synchronized methods
   // which hasn't been entered yet, we set the thread local variable
   // _do_not_unlock_if_synchronized to true. The remove_activation
   // will check this flag.
   const Address do_not_unlock_if_synchronized(r15_thread,
         in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
   __ movbool(do_not_unlock_if_synchronized, true);
   // increment invocation count & check for overflow
   Label invocation_counter_overflow;
   Label profile_method;
   Label profile_method_continue;
   if (inc_counter) {
     generate_counter_incr(&invocation_counter_overflow,
                           &profile_method,
                           &profile_method_continue);
     if (ProfileInterpreter) {
       __ bind(profile_method_continue);
     }
   }
   Label continue_after_compile;
   __ bind(continue_after_compile);
   // check for synchronized interpreted methods
   bang_stack_shadow_pages(false);
   // reset the _do_not_unlock_if_synchronized flag
   __ movbool(do_not_unlock_if_synchronized, false);
   // check for synchronized methods
   // Must happen AFTER invocation_counter check and stack overflow check,
   // so method is not locked if overflows.
   if (synchronized) {
     // Allocate monitor and lock method
     lock_method();
   } else {
     // no synchronization necessary
 #ifdef ASSERT
     {
       Label L;
       __ movl(rax, access_flags);
       __ testl(rax, JVM_ACC_SYNCHRONIZED);
       __ jcc(Assembler::zero, L);
       __ stop("method needs synchronization");
       __ bind(L);
     }
 #endif
   }
   // start execution
 #ifdef ASSERT
   {
     Label L;
      const Address monitor_block_top (rbp,
                  frame::interpreter_frame_monitor_block_top_offset * wordSize);
     __ movptr(rax, monitor_block_top);
     __ cmpptr(rax, rsp);
     __ jcc(Assembler::equal, L);
     __ stop("broken stack frame setup in interpreter");
     __ bind(L);
   }
 #endif
   // jvmti support
   __ notify_method_entry();
   __ dispatch_next(vtos);
   // invocation counter overflow
   if (inc_counter) {
     if (ProfileInterpreter) {
       // We have decided to profile this method in the interpreter
       __ bind(profile_method);
       __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
       __ set_method_data_pointer_for_bcp();
       __ get_method(rbx);
       __ jmp(profile_method_continue);
     }
     // Handle overflow of counter and compile method
     __ bind(invocation_counter_overflow);
     generate_counter_overflow(&continue_after_compile);
   }
   return entry_point;
 }
 // Entry points
 //
 // Here we generate the various kind of entries into the interpreter.
 // The two main entry type are generic bytecode methods and native
 // call method.  These both come in synchronized and non-synchronized
 // versions but the frame layout they create is very similar. The
 // other method entry types are really just special purpose entries
 // that are really entry and interpretation all in one. These are for
 // trivial methods like accessor, empty, or special math methods.
 //
 // When control flow reaches any of the entry types for the interpreter
 // the following holds ->
 //
 // Arguments:
 //
 // rbx: Method*
 //
 // Stack layout immediately at entry
 //
 // [ return address     ] <--- rsp
 // [ parameter n        ]
 //   ...
 // [ parameter 1        ]
 // [ expression stack   ] (caller's java expression stack)
 // Assuming that we don't go to one of the trivial specialized entries
 // the stack will look like below when we are ready to execute the
 // first bytecode (or call the native routine). The register usage
 // will be as the template based interpreter expects (see
 // interpreter_amd64.hpp).
 //
 // local variables follow incoming parameters immediately; i.e.
 // the return address is moved to the end of the locals).
 //
 // [ monitor entry      ] <--- rsp
 //   ...
 // [ monitor entry      ]
 // [ expr. stack bottom ]
 // [ saved r13          ]
 // [ current r14        ]
 // [ Method*            ]
 // [ saved ebp          ] <--- rbp
 // [ return address     ]
 // [ local variable m   ]
 //   ...
 // [ local variable 1   ]
 // [ parameter n        ]
 //   ...
 // [ parameter 1        ] <--- r14
 address AbstractInterpreterGenerator::generate_method_entry(
                                         AbstractInterpreter::MethodKind kind) {
   // determine code generation flags
   bool synchronized = false;
   address entry_point = NULL;
   switch (kind) {
   case Interpreter::zerolocals             :                                                                             break;
   case Interpreter::zerolocals_synchronized: synchronized = true;                                                        break;
   case Interpreter::native                 : entry_point = ((InterpreterGenerator*)this)->generate_native_entry(false); break;
   case Interpreter::native_synchronized    : entry_point = ((InterpreterGenerator*)this)->generate_native_entry(true);  break;
   case Interpreter::empty                  : entry_point = ((InterpreterGenerator*)this)->generate_empty_entry();       break;
   case Interpreter::accessor               : entry_point = ((InterpreterGenerator*)this)->generate_accessor_entry();    break;
   case Interpreter::abstract               : entry_point = ((InterpreterGenerator*)this)->generate_abstract_entry();    break;
   case Interpreter::java_lang_math_sin     : // fall thru
   case Interpreter::java_lang_math_cos     : // fall thru
   case Interpreter::java_lang_math_tan     : // fall thru
   case Interpreter::java_lang_math_abs     : // fall thru
   case Interpreter::java_lang_math_log     : // fall thru
   case Interpreter::java_lang_math_log10   : // fall thru
   case Interpreter::java_lang_math_sqrt    : // fall thru
   case Interpreter::java_lang_math_pow     : // fall thru
   case Interpreter::java_lang_math_exp     : entry_point = ((InterpreterGenerator*)this)->generate_math_entry(kind);    break;
   case Interpreter::java_lang_ref_reference_get
                                            : entry_point = ((InterpreterGenerator*)this)->generate_Reference_get_entry(); break;
   default:
     fatal(err_msg("unexpected method kind: %d", kind));
     break;
   }
   if (entry_point) {
     return entry_point;
   }
   return ((InterpreterGenerator*) this)->
                                 generate_normal_entry(synchronized);
 }
 // These should never be compiled since the interpreter will prefer
 // the compiled version to the intrinsic version.
 bool AbstractInterpreter::can_be_compiled(methodHandle m) {
   switch (method_kind(m)) {
     case Interpreter::java_lang_math_sin     : // fall thru
     case Interpreter::java_lang_math_cos     : // fall thru
     case Interpreter::java_lang_math_tan     : // fall thru
     case Interpreter::java_lang_math_abs     : // fall thru
     case Interpreter::java_lang_math_log     : // fall thru
     case Interpreter::java_lang_math_log10   : // fall thru
     case Interpreter::java_lang_math_sqrt    : // fall thru
     case Interpreter::java_lang_math_pow     : // fall thru
     case Interpreter::java_lang_math_exp     :
       return false;
     default:
       return true;
   }
 }
 // How much stack a method activation needs in words.
 int AbstractInterpreter::size_top_interpreter_activation(Method* method) {
   const int entry_size = frame::interpreter_frame_monitor_size();
   // total overhead size: entry_size + (saved rbp thru expr stack
   // bottom).  be sure to change this if you add/subtract anything
   // to/from the overhead area
   const int overhead_size =
     -(frame::interpreter_frame_initial_sp_offset) + entry_size;
   const int stub_code = frame::entry_frame_after_call_words;
   const int extra_stack = Method::extra_stack_entries();
   const int method_stack = (method->max_locals() + method->max_stack() + extra_stack) *
                            Interpreter::stackElementWords;
   return (overhead_size + method_stack + stub_code);
 }
 int AbstractInterpreter::layout_activation(Method* method,
                                            int tempcount,
                                            int popframe_extra_args,
                                            int moncount,
                                            int caller_actual_parameters,
                                            int callee_param_count,
                                            int callee_locals,
                                            frame* caller,
                                            frame* interpreter_frame,
                                            bool is_top_frame,
                                            bool is_bottom_frame) {
   // Note: This calculation must exactly parallel the frame setup
   // in AbstractInterpreterGenerator::generate_method_entry.
   // If interpreter_frame!=NULL, set up the method, locals, and monitors.
   // The frame interpreter_frame, if not NULL, is guaranteed to be the
   // right size, as determined by a previous call to this method.
   // It is also guaranteed to be walkable even though it is in a skeletal state
   // fixed size of an interpreter frame:
   int max_locals = method->max_locals() * Interpreter::stackElementWords;
   int extra_locals = (method->max_locals() - method->size_of_parameters()) *
                      Interpreter::stackElementWords;
   int overhead = frame::sender_sp_offset -
                  frame::interpreter_frame_initial_sp_offset;
   // Our locals were accounted for by the caller (or last_frame_adjust
   // on the transistion) Since the callee parameters already account
   // for the callee's params we only need to account for the extra
   // locals.
   int size = overhead +
          (callee_locals - callee_param_count)*Interpreter::stackElementWords +
          moncount * frame::interpreter_frame_monitor_size() +
          tempcount* Interpreter::stackElementWords + popframe_extra_args;
   if (interpreter_frame != NULL) {
 #ifdef ASSERT
     if (!EnableInvokeDynamic)
       // @@@ FIXME: Should we correct interpreter_frame_sender_sp in the calling sequences?
       // Probably, since deoptimization doesn't work yet.
       assert(caller->unextended_sp() == interpreter_frame->interpreter_frame_sender_sp(), "Frame not properly walkable");
     assert(caller->sp() == interpreter_frame->sender_sp(), "Frame not properly walkable(2)");
 #endif
     interpreter_frame->interpreter_frame_set_method(method);
     // NOTE the difference in using sender_sp and
     // interpreter_frame_sender_sp interpreter_frame_sender_sp is
     // the original sp of the caller (the unextended_sp) and
     // sender_sp is fp+16 XXX
     intptr_t* locals = interpreter_frame->sender_sp() + max_locals - 1;
 #ifdef ASSERT
     if (caller->is_interpreted_frame()) {
       assert(locals < caller->fp() + frame::interpreter_frame_initial_sp_offset, "bad placement");
     }
 #endif
     interpreter_frame->interpreter_frame_set_locals(locals);
     BasicObjectLock* montop = interpreter_frame->interpreter_frame_monitor_begin();
     BasicObjectLock* monbot = montop - moncount;
     interpreter_frame->interpreter_frame_set_monitor_end(monbot);
     // Set last_sp
     intptr_t*  esp = (intptr_t*) monbot -
                      tempcount*Interpreter::stackElementWords -
                      popframe_extra_args;
     interpreter_frame->interpreter_frame_set_last_sp(esp);
     // All frames but the initial (oldest) interpreter frame we fill in have
     // a value for sender_sp that allows walking the stack but isn't
     // truly correct. Correct the value here.
     if (extra_locals != 0 &&
         interpreter_frame->sender_sp() ==
         interpreter_frame->interpreter_frame_sender_sp()) {
       interpreter_frame->set_interpreter_frame_sender_sp(caller->sp() +
                                                          extra_locals);
     }
     *interpreter_frame->interpreter_frame_cache_addr() =
       method->constants()->cache();
   }
   return size;
 }
 //-----------------------------------------------------------------------------
 // Exceptions
 void TemplateInterpreterGenerator::generate_throw_exception() {
   // Entry point in previous activation (i.e., if the caller was
   // interpreted)
   Interpreter::_rethrow_exception_entry = __ pc();
   // Restore sp to interpreter_frame_last_sp even though we are going
   // to empty the expression stack for the exception processing.
   __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
   // rax: exception
   // rdx: return address/pc that threw exception
   __ restore_bcp();    // r13 points to call/send
   __ restore_locals();
   __ reinit_heapbase();  // restore r12 as heapbase.
   // Entry point for exceptions thrown within interpreter code
   Interpreter::_throw_exception_entry = __ pc();
   // expression stack is undefined here
   // rax: exception
   // r13: exception bcp
   __ verify_oop(rax);
   __ mov(c_rarg1, rax);
   // expression stack must be empty before entering the VM in case of
   // an exception
   __ empty_expression_stack();
   // find exception handler address and preserve exception oop
   __ call_VM(rdx,
              CAST_FROM_FN_PTR(address,
                           InterpreterRuntime::exception_handler_for_exception),
              c_rarg1);
   // rax: exception handler entry point
   // rdx: preserved exception oop
   // r13: bcp for exception handler
   __ push_ptr(rdx); // push exception which is now the only value on the stack
   __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!)
   // If the exception is not handled in the current frame the frame is
   // removed and the exception is rethrown (i.e. exception
   // continuation is _rethrow_exception).
   //
   // Note: At this point the bci is still the bxi for the instruction
   // which caused the exception and the expression stack is
   // empty. Thus, for any VM calls at this point, GC will find a legal
   // oop map (with empty expression stack).
   // In current activation
   // tos: exception
   // esi: exception bcp
   //
   // JVMTI PopFrame support
   //
   Interpreter::_remove_activation_preserving_args_entry = __ pc();
   __ empty_expression_stack();
   // Set the popframe_processing bit in pending_popframe_condition
   // indicating that we are currently handling popframe, so that
   // call_VMs that may happen later do not trigger new popframe
   // handling cycles.
   __ movl(rdx, Address(r15_thread, JavaThread::popframe_condition_offset()));
   __ orl(rdx, JavaThread::popframe_processing_bit);
   __ movl(Address(r15_thread, JavaThread::popframe_condition_offset()), rdx);
   {
     // Check to see whether we are returning to a deoptimized frame.
     // (The PopFrame call ensures that the caller of the popped frame is
     // either interpreted or compiled and deoptimizes it if compiled.)
     // In this case, we can't call dispatch_next() after the frame is
     // popped, but instead must save the incoming arguments and restore
     // them after deoptimization has occurred.
     //
     // Note that we don't compare the return PC against the
     // deoptimization blob's unpack entry because of the presence of
     // adapter frames in C2.
     Label caller_not_deoptimized;
     __ movptr(c_rarg1, Address(rbp, frame::return_addr_offset * wordSize));
     __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
                                InterpreterRuntime::interpreter_contains), c_rarg1);
     __ testl(rax, rax);
     __ jcc(Assembler::notZero, caller_not_deoptimized);
     // Compute size of arguments for saving when returning to
     // deoptimized caller
     __ get_method(rax);
     __ movptr(rax, Address(rax, Method::const_offset()));
     __ load_unsigned_short(rax, Address(rax, in_bytes(ConstMethod::
                                                 size_of_parameters_offset())));
     __ shll(rax, Interpreter::logStackElementSize);
     __ restore_locals(); // XXX do we need this?
     __ subptr(r14, rax);
     __ addptr(r14, wordSize);
     // Save these arguments
     __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
                                            Deoptimization::
                                            popframe_preserve_args),
                           r15_thread, rax, r14);
     __ remove_activation(vtos, rdx,
                          /* throw_monitor_exception */ false,
                          /* install_monitor_exception */ false,
                          /* notify_jvmdi */ false);
     // Inform deoptimization that it is responsible for restoring
     // these arguments
     __ movl(Address(r15_thread, JavaThread::popframe_condition_offset()),
             JavaThread::popframe_force_deopt_reexecution_bit);
     // Continue in deoptimization handler
     __ jmp(rdx);
     __ bind(caller_not_deoptimized);
   }
   __ remove_activation(vtos, rdx, /* rdx result (retaddr) is not used */
                        /* throw_monitor_exception */ false,
                        /* install_monitor_exception */ false,
                        /* notify_jvmdi */ false);
   // Finish with popframe handling
   // A previous I2C followed by a deoptimization might have moved the
   // outgoing arguments further up the stack. PopFrame expects the
   // mutations to those outgoing arguments to be preserved and other
   // constraints basically require this frame to look exactly as
   // though it had previously invoked an interpreted activation with
   // no space between the top of the expression stack (current
   // last_sp) and the top of stack. Rather than force deopt to
   // maintain this kind of invariant all the time we call a small
   // fixup routine to move the mutated arguments onto the top of our
   // expression stack if necessary.
   __ mov(c_rarg1, rsp);
   __ movptr(c_rarg2, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
   // PC must point into interpreter here
   __ set_last_Java_frame(noreg, rbp, __ pc());
   __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), r15_thread, c_rarg1, c_rarg2);
   __ reset_last_Java_frame(true, true);
   // Restore the last_sp and null it out
   __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
   __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
   __ restore_bcp();  // XXX do we need this?
   __ restore_locals(); // XXX do we need this?
   // The method data pointer was incremented already during
   // call profiling. We have to restore the mdp for the current bcp.
   if (ProfileInterpreter) {
     __ set_method_data_pointer_for_bcp();
   }
   // Clear the popframe condition flag
   __ movl(Address(r15_thread, JavaThread::popframe_condition_offset()),
           JavaThread::popframe_inactive);
   __ dispatch_next(vtos);
   // end of PopFrame support
   Interpreter::_remove_activation_entry = __ pc();
   // preserve exception over this code sequence
   __ pop_ptr(rax);
   __ movptr(Address(r15_thread, JavaThread::vm_result_offset()), rax);
   // remove the activation (without doing throws on illegalMonitorExceptions)
   __ remove_activation(vtos, rdx, false, true, false);
   // restore exception
   __ get_vm_result(rax, r15_thread);
   // In between activations - previous activation type unknown yet
   // compute continuation point - the continuation point expects the
   // following registers set up:
   //
   // rax: exception
   // rdx: return address/pc that threw exception
   // rsp: expression stack of caller
   // rbp: ebp of caller
   __ push(rax);                                  // save exception
   __ push(rdx);                                  // save return address
   __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
                           SharedRuntime::exception_handler_for_return_address),
                         r15_thread, rdx);
   __ mov(rbx, rax);                              // save exception handler
   __ pop(rdx);                                   // restore return address
   __ pop(rax);                                   // restore exception
   // Note that an "issuing PC" is actually the next PC after the call
   __ jmp(rbx);                                   // jump to exception
                                                  // handler of caller
 }
 //
 // JVMTI ForceEarlyReturn support
 //
 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
   address entry = __ pc();
   __ restore_bcp();
   __ restore_locals();
   __ empty_expression_stack();
   __ load_earlyret_value(state);
   __ movptr(rdx, Address(r15_thread, JavaThread::jvmti_thread_state_offset()));
   Address cond_addr(rdx, JvmtiThreadState::earlyret_state_offset());
   // Clear the earlyret state
   __ movl(cond_addr, JvmtiThreadState::earlyret_inactive);
   __ remove_activation(state, rsi,
                        false, /* throw_monitor_exception */
                        false, /* install_monitor_exception */
                        true); /* notify_jvmdi */
   __ jmp(rsi);
   return entry;
 } // end of ForceEarlyReturn support
 //-----------------------------------------------------------------------------
 // Helper for vtos entry point generation
 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t,
                                                          address& bep,
                                                          address& cep,
                                                          address& sep,
                                                          address& aep,
                                                          address& iep,
                                                          address& lep,
                                                          address& fep,
                                                          address& dep,
                                                          address& vep) {
   assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
   Label L;
   aep = __ pc();  __ push_ptr();  __ jmp(L);
   fep = __ pc();  __ push_f();    __ jmp(L);
   dep = __ pc();  __ push_d();    __ jmp(L);
   lep = __ pc();  __ push_l();    __ jmp(L);
   bep = cep = sep =
   iep = __ pc();  __ push_i();
   vep = __ pc();
   __ bind(L);
   generate_and_dispatch(t);
 }
 //-----------------------------------------------------------------------------
 // Generation of individual instructions
 // helpers for generate_and_dispatch
 InterpreterGenerator::InterpreterGenerator(StubQueue* code)
   : TemplateInterpreterGenerator(code) {
    generate_all(); // down here so it can be "virtual"
 }
 //-----------------------------------------------------------------------------
 // Non-product code
 #ifndef PRODUCT
 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
   address entry = __ pc();
   __ push(state);
   __ push(c_rarg0);
   __ push(c_rarg1);
   __ push(c_rarg2);
   __ push(c_rarg3);
   __ mov(c_rarg2, rax);  // Pass itos
 #ifdef _WIN64
   __ movflt(xmm3, xmm0); // Pass ftos
 #endif
   __ call_VM(noreg,
              CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode),
              c_rarg1, c_rarg2, c_rarg3);
   __ pop(c_rarg3);
   __ pop(c_rarg2);
   __ pop(c_rarg1);
   __ pop(c_rarg0);
   __ pop(state);
   __ ret(0);                                   // return from result handler
   return entry;
 }
 void TemplateInterpreterGenerator::count_bytecode() {
   __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value));
 }
 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
   __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()]));
 }
 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
   __ mov32(rbx, ExternalAddress((address) &BytecodePairHistogram::_index));
   __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes);
   __ orl(rbx,
          ((int) t->bytecode()) <<
          BytecodePairHistogram::log2_number_of_codes);
   __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx);
   __ lea(rscratch1, ExternalAddress((address) BytecodePairHistogram::_counters));
   __ incrementl(Address(rscratch1, rbx, Address::times_4));
 }
 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
   // Call a little run-time stub to avoid blow-up for each bytecode.
   // The run-time runtime saves the right registers, depending on
   // the tosca in-state for the given template.
   assert(Interpreter::trace_code(t->tos_in()) != NULL,
          "entry must have been generated");
   __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
   __ andptr(rsp, -16); // align stack as required by ABI
   __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
   __ mov(rsp, r12); // restore sp
   __ reinit_heapbase();
 }
 void TemplateInterpreterGenerator::stop_interpreter_at() {
   Label L;
   __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value),
            StopInterpreterAt);
   __ jcc(Assembler::notEqual, L);
   __ int3();
   __ bind(L);
 }
 #endif // !PRODUCT
 #endif // ! CC_INTERP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/x86/vm/templateInterpreter_x86_64.cpp@47766e2d2527 (annotated)

src/cpu/x86/vm/templateInterpreter_x86_64.cpp