jdk8-mips64-public/hotspot: src/share/vm/interpreter/bytecodeInterpreter.cpp@018b357638aa (annotated)

src/share/vm/interpreter/bytecodeInterpreter.cpp@018b357638aa (annotated)

src/share/vm/interpreter/bytecodeInterpreter.cpp

Tue, 19 Nov 2013 11:53:58 -0800

author: simonis
date: Tue, 19 Nov 2013 11:53:58 -0800
changeset 6483: 018b357638aa
parent 6470: abe03600372a
child 6496: b4e19a1e459f
permissions: -rw-r--r--

8028514: PPC64: Fix C++ Interpreter after '7195622: CheckUnhandledOops has limited usefulness now'
Summary: fix CPP-interpreter after CheckUnhandledOops was re-enabled in the fastdebug build
Reviewed-by: kvn, dholmes, lfoltan

 /*
  * Copyright (c) 2002, 2012, 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.
  *
  */
 // no precompiled headers
 #include "classfile/vmSymbols.hpp"
 #include "gc_interface/collectedHeap.hpp"
 #include "interpreter/bytecodeHistogram.hpp"
 #include "interpreter/bytecodeInterpreter.hpp"
 #include "interpreter/bytecodeInterpreter.inline.hpp"
 #include "interpreter/bytecodeInterpreterProfiling.hpp"
 #include "interpreter/interpreter.hpp"
 #include "interpreter/interpreterRuntime.hpp"
 #include "memory/resourceArea.hpp"
 #include "oops/methodCounters.hpp"
 #include "oops/objArrayKlass.hpp"
 #include "oops/oop.inline.hpp"
 #include "prims/jvmtiExport.hpp"
 #include "prims/jvmtiThreadState.hpp"
 #include "runtime/biasedLocking.hpp"
 #include "runtime/frame.inline.hpp"
 #include "runtime/handles.inline.hpp"
 #include "runtime/interfaceSupport.hpp"
 #include "runtime/sharedRuntime.hpp"
 #include "runtime/threadCritical.hpp"
 #include "utilities/exceptions.hpp"
 #ifdef TARGET_OS_ARCH_linux_x86
 # include "orderAccess_linux_x86.inline.hpp"
 #endif
 #ifdef TARGET_OS_ARCH_linux_sparc
 # include "orderAccess_linux_sparc.inline.hpp"
 #endif
 #ifdef TARGET_OS_ARCH_linux_zero
 # include "orderAccess_linux_zero.inline.hpp"
 #endif
 #ifdef TARGET_OS_ARCH_solaris_x86
 # include "orderAccess_solaris_x86.inline.hpp"
 #endif
 #ifdef TARGET_OS_ARCH_solaris_sparc
 # include "orderAccess_solaris_sparc.inline.hpp"
 #endif
 #ifdef TARGET_OS_ARCH_windows_x86
 # include "orderAccess_windows_x86.inline.hpp"
 #endif
 #ifdef TARGET_OS_ARCH_linux_arm
 # include "orderAccess_linux_arm.inline.hpp"
 #endif
 #ifdef TARGET_OS_ARCH_linux_ppc
 # include "orderAccess_linux_ppc.inline.hpp"
 #endif
 #ifdef TARGET_OS_ARCH_aix_ppc
 # include "orderAccess_aix_ppc.inline.hpp"
 #endif
 #ifdef TARGET_OS_ARCH_bsd_x86
 # include "orderAccess_bsd_x86.inline.hpp"
 #endif
 #ifdef TARGET_OS_ARCH_bsd_zero
 # include "orderAccess_bsd_zero.inline.hpp"
 #endif
 // no precompiled headers
 #ifdef CC_INTERP
 /*
  * USELABELS - If using GCC, then use labels for the opcode dispatching
  * rather -then a switch statement. This improves performance because it
  * gives us the oportunity to have the instructions that calculate the
  * next opcode to jump to be intermixed with the rest of the instructions
  * that implement the opcode (see UPDATE_PC_AND_TOS_AND_CONTINUE macro).
  */
 #undef USELABELS
 #ifdef __GNUC__
 /*
    ASSERT signifies debugging. It is much easier to step thru bytecodes if we
    don't use the computed goto approach.
 */
 #ifndef ASSERT
 #define USELABELS
 #endif
 #endif
 #undef CASE
 #ifdef USELABELS
 #define CASE(opcode) opc ## opcode
 #define DEFAULT opc_default
 #else
 #define CASE(opcode) case Bytecodes:: opcode
 #define DEFAULT default
 #endif
 /*
  * PREFETCH_OPCCODE - Some compilers do better if you prefetch the next
  * opcode before going back to the top of the while loop, rather then having
  * the top of the while loop handle it. This provides a better opportunity
  * for instruction scheduling. Some compilers just do this prefetch
  * automatically. Some actually end up with worse performance if you
  * force the prefetch. Solaris gcc seems to do better, but cc does worse.
  */
 #undef PREFETCH_OPCCODE
 #define PREFETCH_OPCCODE
 /*
   Interpreter safepoint: it is expected that the interpreter will have no live
   handles of its own creation live at an interpreter safepoint. Therefore we
   run a HandleMarkCleaner and trash all handles allocated in the call chain
   since the JavaCalls::call_helper invocation that initiated the chain.
   There really shouldn't be any handles remaining to trash but this is cheap
   in relation to a safepoint.
 */
 #define SAFEPOINT                                                                 \
     if ( SafepointSynchronize::is_synchronizing()) {                              \
         {                                                                         \
           /* zap freed handles rather than GC'ing them */                         \
           HandleMarkCleaner __hmc(THREAD);                                        \
         }                                                                         \
         CALL_VM(SafepointSynchronize::block(THREAD), handle_exception);           \
     }
 /*
  * VM_JAVA_ERROR - Macro for throwing a java exception from
  * the interpreter loop. Should really be a CALL_VM but there
  * is no entry point to do the transition to vm so we just
  * do it by hand here.
  */
 #define VM_JAVA_ERROR_NO_JUMP(name, msg, note_a_trap)                             \
     DECACHE_STATE();                                                              \
     SET_LAST_JAVA_FRAME();                                                        \
     {                                                                             \
        InterpreterRuntime::note_a_trap(THREAD, istate->method(), BCI());          \
        ThreadInVMfromJava trans(THREAD);                                          \
        Exceptions::_throw_msg(THREAD, __FILE__, __LINE__, name, msg);             \
     }                                                                             \
     RESET_LAST_JAVA_FRAME();                                                      \
     CACHE_STATE();
 // Normal throw of a java error.
 #define VM_JAVA_ERROR(name, msg, note_a_trap)                                     \
     VM_JAVA_ERROR_NO_JUMP(name, msg, note_a_trap)                                 \
     goto handle_exception;
 #ifdef PRODUCT
 #define DO_UPDATE_INSTRUCTION_COUNT(opcode)
 #else
 #define DO_UPDATE_INSTRUCTION_COUNT(opcode)                                                          \
 {                                                                                                    \
     BytecodeCounter::_counter_value++;                                                               \
     BytecodeHistogram::_counters[(Bytecodes::Code)opcode]++;                                         \
     if (StopInterpreterAt && StopInterpreterAt == BytecodeCounter::_counter_value) os::breakpoint(); \
     if (TraceBytecodes) {                                                                            \
       CALL_VM((void)SharedRuntime::trace_bytecode(THREAD, 0,               \
                                    topOfStack[Interpreter::expr_index_at(1)],   \
                                    topOfStack[Interpreter::expr_index_at(2)]),  \
                                    handle_exception);                      \
     }                                                                      \
 }
 #endif
 #undef DEBUGGER_SINGLE_STEP_NOTIFY
 #ifdef VM_JVMTI
 /* NOTE: (kbr) This macro must be called AFTER the PC has been
    incremented. JvmtiExport::at_single_stepping_point() may cause a
    breakpoint opcode to get inserted at the current PC to allow the
    debugger to coalesce single-step events.
    As a result if we call at_single_stepping_point() we refetch opcode
    to get the current opcode. This will override any other prefetching
    that might have occurred.
 */
 #define DEBUGGER_SINGLE_STEP_NOTIFY()                                            \
 {                                                                                \
       if (_jvmti_interp_events) {                                                \
         if (JvmtiExport::should_post_single_step()) {                            \
           DECACHE_STATE();                                                       \
           SET_LAST_JAVA_FRAME();                                                 \
           ThreadInVMfromJava trans(THREAD);                                      \
           JvmtiExport::at_single_stepping_point(THREAD,                          \
                                           istate->method(),                      \
                                           pc);                                   \
           RESET_LAST_JAVA_FRAME();                                               \
           CACHE_STATE();                                                         \
           if (THREAD->pop_frame_pending() &&                                     \
               !THREAD->pop_frame_in_process()) {                                 \
             goto handle_Pop_Frame;                                               \
           }                                                                      \
           if (THREAD->jvmti_thread_state() &&                                    \
               THREAD->jvmti_thread_state()->is_earlyret_pending()) {             \
             goto handle_Early_Return;                                            \
           }                                                                      \
           opcode = *pc;                                                          \
         }                                                                        \
       }                                                                          \
 }
 #else
 #define DEBUGGER_SINGLE_STEP_NOTIFY()
 #endif
 /*
  * CONTINUE - Macro for executing the next opcode.
  */
 #undef CONTINUE
 #ifdef USELABELS
 // Have to do this dispatch this way in C++ because otherwise gcc complains about crossing an
 // initialization (which is is the initialization of the table pointer...)
 #define DISPATCH(opcode) goto *(void*)dispatch_table[opcode]
 #define CONTINUE {                              \
         opcode = *pc;                           \
         DO_UPDATE_INSTRUCTION_COUNT(opcode);    \
         DEBUGGER_SINGLE_STEP_NOTIFY();          \
         DISPATCH(opcode);                       \
     }
 #else
 #ifdef PREFETCH_OPCCODE
 #define CONTINUE {                              \
         opcode = *pc;                           \
         DO_UPDATE_INSTRUCTION_COUNT(opcode);    \
         DEBUGGER_SINGLE_STEP_NOTIFY();          \
         continue;                               \
     }
 #else
 #define CONTINUE {                              \
         DO_UPDATE_INSTRUCTION_COUNT(opcode);    \
         DEBUGGER_SINGLE_STEP_NOTIFY();          \
         continue;                               \
     }
 #endif
 #endif
 #define UPDATE_PC(opsize) {pc += opsize; }
 /*
  * UPDATE_PC_AND_TOS - Macro for updating the pc and topOfStack.
  */
 #undef UPDATE_PC_AND_TOS
 #define UPDATE_PC_AND_TOS(opsize, stack) \
     {pc += opsize; MORE_STACK(stack); }
 /*
  * UPDATE_PC_AND_TOS_AND_CONTINUE - Macro for updating the pc and topOfStack,
  * and executing the next opcode. It's somewhat similar to the combination
  * of UPDATE_PC_AND_TOS and CONTINUE, but with some minor optimizations.
  */
 #undef UPDATE_PC_AND_TOS_AND_CONTINUE
 #ifdef USELABELS
 #define UPDATE_PC_AND_TOS_AND_CONTINUE(opsize, stack) {         \
         pc += opsize; opcode = *pc; MORE_STACK(stack);          \
         DO_UPDATE_INSTRUCTION_COUNT(opcode);                    \
         DEBUGGER_SINGLE_STEP_NOTIFY();                          \
         DISPATCH(opcode);                                       \
     }
 #define UPDATE_PC_AND_CONTINUE(opsize) {                        \
         pc += opsize; opcode = *pc;                             \
         DO_UPDATE_INSTRUCTION_COUNT(opcode);                    \
         DEBUGGER_SINGLE_STEP_NOTIFY();                          \
         DISPATCH(opcode);                                       \
     }
 #else
 #ifdef PREFETCH_OPCCODE
 #define UPDATE_PC_AND_TOS_AND_CONTINUE(opsize, stack) {         \
         pc += opsize; opcode = *pc; MORE_STACK(stack);          \
         DO_UPDATE_INSTRUCTION_COUNT(opcode);                    \
         DEBUGGER_SINGLE_STEP_NOTIFY();                          \
         goto do_continue;                                       \
     }
 #define UPDATE_PC_AND_CONTINUE(opsize) {                        \
         pc += opsize; opcode = *pc;                             \
         DO_UPDATE_INSTRUCTION_COUNT(opcode);                    \
         DEBUGGER_SINGLE_STEP_NOTIFY();                          \
         goto do_continue;                                       \
     }
 #else
 #define UPDATE_PC_AND_TOS_AND_CONTINUE(opsize, stack) { \
         pc += opsize; MORE_STACK(stack);                \
         DO_UPDATE_INSTRUCTION_COUNT(opcode);            \
         DEBUGGER_SINGLE_STEP_NOTIFY();                  \
         goto do_continue;                               \
     }
 #define UPDATE_PC_AND_CONTINUE(opsize) {                \
         pc += opsize;                                   \
         DO_UPDATE_INSTRUCTION_COUNT(opcode);            \
         DEBUGGER_SINGLE_STEP_NOTIFY();                  \
         goto do_continue;                               \
     }
 #endif /* PREFETCH_OPCCODE */
 #endif /* USELABELS */
 // About to call a new method, update the save the adjusted pc and return to frame manager
 #define UPDATE_PC_AND_RETURN(opsize)  \
    DECACHE_TOS();                     \
    istate->set_bcp(pc+opsize);        \
    return;
 #define METHOD istate->method()
 #define GET_METHOD_COUNTERS(res)    \
   res = METHOD->method_counters();  \
   if (res == NULL) {                \
     CALL_VM(res = InterpreterRuntime::build_method_counters(THREAD, METHOD), handle_exception); \
   }
 #define OSR_REQUEST(res, branch_pc) \
             CALL_VM(res=InterpreterRuntime::frequency_counter_overflow(THREAD, branch_pc), handle_exception);
 /*
  * For those opcodes that need to have a GC point on a backwards branch
  */
 // Backedge counting is kind of strange. The asm interpreter will increment
 // the backedge counter as a separate counter but it does it's comparisons
 // to the sum (scaled) of invocation counter and backedge count to make
 // a decision. Seems kind of odd to sum them together like that
 // skip is delta from current bcp/bci for target, branch_pc is pre-branch bcp
 #define DO_BACKEDGE_CHECKS(skip, branch_pc)                                                         \
     if ((skip) <= 0) {                                                                              \
       MethodCounters* mcs;                                                                          \
       GET_METHOD_COUNTERS(mcs);                                                                     \
       if (UseLoopCounter) {                                                                         \
         bool do_OSR = UseOnStackReplacement;                                                        \
         mcs->backedge_counter()->increment();                                                       \
         if (ProfileInterpreter) {                                                                   \
           BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception);                                   \
           /* Check for overflow against MDO count. */                                               \
           do_OSR = do_OSR                                                                           \
             && (mdo_last_branch_taken_count >= (uint)InvocationCounter::InterpreterBackwardBranchLimit)\
             /* When ProfileInterpreter is on, the backedge_count comes     */                       \
             /* from the methodDataOop, which value does not get reset on   */                       \
             /* the call to frequency_counter_overflow(). To avoid          */                       \
             /* excessive calls to the overflow routine while the method is */                       \
             /* being compiled, add a second test to make sure the overflow */                       \
             /* function is called only once every overflow_frequency.      */                       \
             && (!(mdo_last_branch_taken_count & 1023));                                             \
         } else {                                                                                    \
           /* check for overflow of backedge counter */                                              \
           do_OSR = do_OSR                                                                           \
             && mcs->invocation_counter()->reached_InvocationLimit(mcs->backedge_counter());         \
         }                                                                                           \
         if (do_OSR) {                                                                               \
           nmethod* osr_nmethod;                                                                     \
           OSR_REQUEST(osr_nmethod, branch_pc);                                                      \
           if (osr_nmethod != NULL && osr_nmethod->osr_entry_bci() != InvalidOSREntryBci) {          \
             intptr_t* buf;                                                                          \
             /* Call OSR migration with last java frame only, no checks. */                          \
             CALL_VM_NAKED_LJF(buf=SharedRuntime::OSR_migration_begin(THREAD));                      \
             istate->set_msg(do_osr);                                                                \
             istate->set_osr_buf((address)buf);                                                      \
             istate->set_osr_entry(osr_nmethod->osr_entry());                                        \
             return;                                                                                 \
           }                                                                                         \
         }                                                                                           \
       }  /* UseCompiler ... */                                                                      \
       SAFEPOINT;                                                                                    \
     }
 /*
  * For those opcodes that need to have a GC point on a backwards branch
  */
 /*
  * Macros for caching and flushing the interpreter state. Some local
  * variables need to be flushed out to the frame before we do certain
  * things (like pushing frames or becomming gc safe) and some need to
  * be recached later (like after popping a frame). We could use one
  * macro to cache or decache everything, but this would be less then
  * optimal because we don't always need to cache or decache everything
  * because some things we know are already cached or decached.
  */
 #undef DECACHE_TOS
 #undef CACHE_TOS
 #undef CACHE_PREV_TOS
 #define DECACHE_TOS()    istate->set_stack(topOfStack);
 #define CACHE_TOS()      topOfStack = (intptr_t *)istate->stack();
 #undef DECACHE_PC
 #undef CACHE_PC
 #define DECACHE_PC()    istate->set_bcp(pc);
 #define CACHE_PC()      pc = istate->bcp();
 #define CACHE_CP()      cp = istate->constants();
 #define CACHE_LOCALS()  locals = istate->locals();
 #undef CACHE_FRAME
 #define CACHE_FRAME()
 // BCI() returns the current bytecode-index.
 #undef  BCI
 #define BCI()           ((int)(intptr_t)(pc - (intptr_t)istate->method()->code_base()))
 /*
  * CHECK_NULL - Macro for throwing a NullPointerException if the object
  * passed is a null ref.
  * On some architectures/platforms it should be possible to do this implicitly
  */
 #undef CHECK_NULL
 #define CHECK_NULL(obj_)                                                                       \
         if ((obj_) == NULL) {                                                                  \
           VM_JAVA_ERROR(vmSymbols::java_lang_NullPointerException(), "", note_nullCheck_trap); \
         }                                                                                      \
         VERIFY_OOP(obj_)
 #define VMdoubleConstZero() 0.0
 #define VMdoubleConstOne() 1.0
 #define VMlongConstZero() (max_jlong-max_jlong)
 #define VMlongConstOne() ((max_jlong-max_jlong)+1)
 /*
  * Alignment
  */
 #define VMalignWordUp(val)          (((uintptr_t)(val) + 3) & ~3)
 // Decache the interpreter state that interpreter modifies directly (i.e. GC is indirect mod)
 #define DECACHE_STATE() DECACHE_PC(); DECACHE_TOS();
 // Reload interpreter state after calling the VM or a possible GC
 #define CACHE_STATE()   \
         CACHE_TOS();    \
         CACHE_PC();     \
         CACHE_CP();     \
         CACHE_LOCALS();
 // Call the VM with last java frame only.
 #define CALL_VM_NAKED_LJF(func)                                    \
         DECACHE_STATE();                                           \
         SET_LAST_JAVA_FRAME();                                     \
         func;                                                      \
         RESET_LAST_JAVA_FRAME();                                   \
         CACHE_STATE();
 // Call the VM. Don't check for pending exceptions.
 #define CALL_VM_NOCHECK(func)                                      \
         CALL_VM_NAKED_LJF(func)                                    \
         if (THREAD->pop_frame_pending() &&                         \
             !THREAD->pop_frame_in_process()) {                     \
           goto handle_Pop_Frame;                                   \
         }                                                          \
         if (THREAD->jvmti_thread_state() &&                        \
             THREAD->jvmti_thread_state()->is_earlyret_pending()) { \
           goto handle_Early_Return;                                \
         }
 // Call the VM and check for pending exceptions
 #define CALL_VM(func, label) {                                     \
           CALL_VM_NOCHECK(func);                                   \
           if (THREAD->has_pending_exception()) goto label;         \
         }
 /*
  * BytecodeInterpreter::run(interpreterState istate)
  * BytecodeInterpreter::runWithChecks(interpreterState istate)
  *
  * The real deal. This is where byte codes actually get interpreted.
  * Basically it's a big while loop that iterates until we return from
  * the method passed in.
  *
  * The runWithChecks is used if JVMTI is enabled.
  *
  */
 #if defined(VM_JVMTI)
 void
 BytecodeInterpreter::runWithChecks(interpreterState istate) {
 #else
 void
 BytecodeInterpreter::run(interpreterState istate) {
 #endif
   // In order to simplify some tests based on switches set at runtime
   // we invoke the interpreter a single time after switches are enabled
   // and set simpler to to test variables rather than method calls or complex
   // boolean expressions.
   static int initialized = 0;
   static int checkit = 0;
   static intptr_t* c_addr = NULL;
   static intptr_t  c_value;
   if (checkit && *c_addr != c_value) {
     os::breakpoint();
   }
 #ifdef VM_JVMTI
   static bool _jvmti_interp_events = 0;
 #endif
   static int _compiling;  // (UseCompiler || CountCompiledCalls)
 #ifdef ASSERT
   if (istate->_msg != initialize) {
     // We have a problem here if we are running with a pre-hsx24 JDK (for example during bootstrap)
     // because in that case, EnableInvokeDynamic is true by default but will be later switched off
     // if java_lang_invoke_MethodHandle::compute_offsets() detects that the JDK only has the classes
     // for the old JSR292 implementation.
     // This leads to a situation where 'istate->_stack_limit' always accounts for
     // methodOopDesc::extra_stack_entries() because it is computed in
     // CppInterpreterGenerator::generate_compute_interpreter_state() which was generated while
     // EnableInvokeDynamic was still true. On the other hand, istate->_method->max_stack() doesn't
     // account for extra_stack_entries() anymore because at the time when it is called
     // EnableInvokeDynamic was already set to false.
     // So we have a second version of the assertion which handles the case where EnableInvokeDynamic was
     // switched off because of the wrong classes.
     if (EnableInvokeDynamic || FLAG_IS_CMDLINE(EnableInvokeDynamic)) {
       assert(labs(istate->_stack_base - istate->_stack_limit) == (istate->_method->max_stack() + 1), "bad stack limit");
     } else {
       const int extra_stack_entries = Method::extra_stack_entries_for_jsr292;
       assert(labs(istate->_stack_base - istate->_stack_limit) == (istate->_method->max_stack() + extra_stack_entries
                                                                                                + 1), "bad stack limit");
     }
 #ifndef SHARK
     IA32_ONLY(assert(istate->_stack_limit == istate->_thread->last_Java_sp() + 1, "wrong"));
 #endif // !SHARK
   }
   // Verify linkages.
   interpreterState l = istate;
   do {
     assert(l == l->_self_link, "bad link");
     l = l->_prev_link;
   } while (l != NULL);
   // Screwups with stack management usually cause us to overwrite istate
   // save a copy so we can verify it.
   interpreterState orig = istate;
 #endif
   register intptr_t*        topOfStack = (intptr_t *)istate->stack(); /* access with STACK macros */
   register address          pc = istate->bcp();
   register jubyte opcode;
   register intptr_t*        locals = istate->locals();
   register ConstantPoolCache*    cp = istate->constants(); // method()->constants()->cache()
 #ifdef LOTS_OF_REGS
   register JavaThread*      THREAD = istate->thread();
 #else
 #undef THREAD
 #define THREAD istate->thread()
 #endif
 #ifdef USELABELS
   const static void* const opclabels_data[256] = {
 /* 0x00 */ &&opc_nop,     &&opc_aconst_null,&&opc_iconst_m1,&&opc_iconst_0,
 /* 0x04 */ &&opc_iconst_1,&&opc_iconst_2,   &&opc_iconst_3, &&opc_iconst_4,
 /* 0x08 */ &&opc_iconst_5,&&opc_lconst_0,   &&opc_lconst_1, &&opc_fconst_0,
 /* 0x0C */ &&opc_fconst_1,&&opc_fconst_2,   &&opc_dconst_0, &&opc_dconst_1,
 /* 0x10 */ &&opc_bipush, &&opc_sipush, &&opc_ldc,    &&opc_ldc_w,
 /* 0x14 */ &&opc_ldc2_w, &&opc_iload,  &&opc_lload,  &&opc_fload,
 /* 0x18 */ &&opc_dload,  &&opc_aload,  &&opc_iload_0,&&opc_iload_1,
 /* 0x1C */ &&opc_iload_2,&&opc_iload_3,&&opc_lload_0,&&opc_lload_1,
 /* 0x20 */ &&opc_lload_2,&&opc_lload_3,&&opc_fload_0,&&opc_fload_1,
 /* 0x24 */ &&opc_fload_2,&&opc_fload_3,&&opc_dload_0,&&opc_dload_1,
 /* 0x28 */ &&opc_dload_2,&&opc_dload_3,&&opc_aload_0,&&opc_aload_1,
 /* 0x2C */ &&opc_aload_2,&&opc_aload_3,&&opc_iaload, &&opc_laload,
 /* 0x30 */ &&opc_faload,  &&opc_daload,  &&opc_aaload,  &&opc_baload,
 /* 0x34 */ &&opc_caload,  &&opc_saload,  &&opc_istore,  &&opc_lstore,
 /* 0x38 */ &&opc_fstore,  &&opc_dstore,  &&opc_astore,  &&opc_istore_0,
 /* 0x3C */ &&opc_istore_1,&&opc_istore_2,&&opc_istore_3,&&opc_lstore_0,
 /* 0x40 */ &&opc_lstore_1,&&opc_lstore_2,&&opc_lstore_3,&&opc_fstore_0,
 /* 0x44 */ &&opc_fstore_1,&&opc_fstore_2,&&opc_fstore_3,&&opc_dstore_0,
 /* 0x48 */ &&opc_dstore_1,&&opc_dstore_2,&&opc_dstore_3,&&opc_astore_0,
 /* 0x4C */ &&opc_astore_1,&&opc_astore_2,&&opc_astore_3,&&opc_iastore,
 /* 0x50 */ &&opc_lastore,&&opc_fastore,&&opc_dastore,&&opc_aastore,
 /* 0x54 */ &&opc_bastore,&&opc_castore,&&opc_sastore,&&opc_pop,
 /* 0x58 */ &&opc_pop2,   &&opc_dup,    &&opc_dup_x1, &&opc_dup_x2,
 /* 0x5C */ &&opc_dup2,   &&opc_dup2_x1,&&opc_dup2_x2,&&opc_swap,
 /* 0x60 */ &&opc_iadd,&&opc_ladd,&&opc_fadd,&&opc_dadd,
 /* 0x64 */ &&opc_isub,&&opc_lsub,&&opc_fsub,&&opc_dsub,
 /* 0x68 */ &&opc_imul,&&opc_lmul,&&opc_fmul,&&opc_dmul,
 /* 0x6C */ &&opc_idiv,&&opc_ldiv,&&opc_fdiv,&&opc_ddiv,
 /* 0x70 */ &&opc_irem, &&opc_lrem, &&opc_frem,&&opc_drem,
 /* 0x74 */ &&opc_ineg, &&opc_lneg, &&opc_fneg,&&opc_dneg,
 /* 0x78 */ &&opc_ishl, &&opc_lshl, &&opc_ishr,&&opc_lshr,
 /* 0x7C */ &&opc_iushr,&&opc_lushr,&&opc_iand,&&opc_land,
 /* 0x80 */ &&opc_ior, &&opc_lor,&&opc_ixor,&&opc_lxor,
 /* 0x84 */ &&opc_iinc,&&opc_i2l,&&opc_i2f, &&opc_i2d,
 /* 0x88 */ &&opc_l2i, &&opc_l2f,&&opc_l2d, &&opc_f2i,
 /* 0x8C */ &&opc_f2l, &&opc_f2d,&&opc_d2i, &&opc_d2l,
 /* 0x90 */ &&opc_d2f,  &&opc_i2b,  &&opc_i2c,  &&opc_i2s,
 /* 0x94 */ &&opc_lcmp, &&opc_fcmpl,&&opc_fcmpg,&&opc_dcmpl,
 /* 0x98 */ &&opc_dcmpg,&&opc_ifeq, &&opc_ifne, &&opc_iflt,
 /* 0x9C */ &&opc_ifge, &&opc_ifgt, &&opc_ifle, &&opc_if_icmpeq,
 /* 0xA0 */ &&opc_if_icmpne,&&opc_if_icmplt,&&opc_if_icmpge,  &&opc_if_icmpgt,
 /* 0xA4 */ &&opc_if_icmple,&&opc_if_acmpeq,&&opc_if_acmpne,  &&opc_goto,
 /* 0xA8 */ &&opc_jsr,      &&opc_ret,      &&opc_tableswitch,&&opc_lookupswitch,
 /* 0xAC */ &&opc_ireturn,  &&opc_lreturn,  &&opc_freturn,    &&opc_dreturn,
 /* 0xB0 */ &&opc_areturn,     &&opc_return,         &&opc_getstatic,    &&opc_putstatic,
 /* 0xB4 */ &&opc_getfield,    &&opc_putfield,       &&opc_invokevirtual,&&opc_invokespecial,
 /* 0xB8 */ &&opc_invokestatic,&&opc_invokeinterface,&&opc_invokedynamic,&&opc_new,
 /* 0xBC */ &&opc_newarray,    &&opc_anewarray,      &&opc_arraylength,  &&opc_athrow,
 /* 0xC0 */ &&opc_checkcast,   &&opc_instanceof,     &&opc_monitorenter, &&opc_monitorexit,
 /* 0xC4 */ &&opc_wide,        &&opc_multianewarray, &&opc_ifnull,       &&opc_ifnonnull,
 /* 0xC8 */ &&opc_goto_w,      &&opc_jsr_w,          &&opc_breakpoint,   &&opc_default,
 /* 0xCC */ &&opc_default,     &&opc_default,        &&opc_default,      &&opc_default,
 /* 0xD0 */ &&opc_default,     &&opc_default,        &&opc_default,      &&opc_default,
 /* 0xD4 */ &&opc_default,     &&opc_default,        &&opc_default,      &&opc_default,
 /* 0xD8 */ &&opc_default,     &&opc_default,        &&opc_default,      &&opc_default,
 /* 0xDC */ &&opc_default,     &&opc_default,        &&opc_default,      &&opc_default,
 /* 0xE0 */ &&opc_default,     &&opc_default,        &&opc_default,      &&opc_default,
 /* 0xE4 */ &&opc_default,     &&opc_fast_aldc,      &&opc_fast_aldc_w,  &&opc_return_register_finalizer,
 /* 0xE8 */ &&opc_invokehandle,&&opc_default,        &&opc_default,      &&opc_default,
 /* 0xEC */ &&opc_default,     &&opc_default,        &&opc_default,      &&opc_default,
 /* 0xF0 */ &&opc_default,     &&opc_default,        &&opc_default,      &&opc_default,
 /* 0xF4 */ &&opc_default,     &&opc_default,        &&opc_default,      &&opc_default,
 /* 0xF8 */ &&opc_default,     &&opc_default,        &&opc_default,      &&opc_default,
 /* 0xFC */ &&opc_default,     &&opc_default,        &&opc_default,      &&opc_default
   };
   register uintptr_t *dispatch_table = (uintptr_t*)&opclabels_data[0];
 #endif /* USELABELS */
 #ifdef ASSERT
   // this will trigger a VERIFY_OOP on entry
   if (istate->msg() != initialize && ! METHOD->is_static()) {
     oop rcvr = LOCALS_OBJECT(0);
     VERIFY_OOP(rcvr);
   }
 #endif
 // #define HACK
 #ifdef HACK
   bool interesting = false;
 #endif // HACK
   /* QQQ this should be a stack method so we don't know actual direction */
   guarantee(istate->msg() == initialize ||
          topOfStack >= istate->stack_limit() &&
          topOfStack < istate->stack_base(),
          "Stack top out of range");
 #ifdef CC_INTERP_PROFILE
   // MethodData's last branch taken count.
   uint mdo_last_branch_taken_count = 0;
 #else
   const uint mdo_last_branch_taken_count = 0;
 #endif
   switch (istate->msg()) {
     case initialize: {
       if (initialized++) ShouldNotReachHere(); // Only one initialize call.
       _compiling = (UseCompiler || CountCompiledCalls);
 #ifdef VM_JVMTI
       _jvmti_interp_events = JvmtiExport::can_post_interpreter_events();
 #endif
       return;
     }
     break;
     case method_entry: {
       THREAD->set_do_not_unlock();
       // count invocations
       assert(initialized, "Interpreter not initialized");
       if (_compiling) {
         MethodCounters* mcs;
         GET_METHOD_COUNTERS(mcs);
         if (ProfileInterpreter) {
           METHOD->increment_interpreter_invocation_count(THREAD);
         }
         mcs->invocation_counter()->increment();
         if (mcs->invocation_counter()->reached_InvocationLimit(mcs->backedge_counter())) {
           CALL_VM((void)InterpreterRuntime::frequency_counter_overflow(THREAD, NULL), handle_exception);
           // We no longer retry on a counter overflow.
         }
         // Get or create profile data. Check for pending (async) exceptions.
         BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception);
         SAFEPOINT;
       }
       if ((istate->_stack_base - istate->_stack_limit) != istate->method()->max_stack() + 1) {
         // initialize
         os::breakpoint();
       }
 #ifdef HACK
       {
         ResourceMark rm;
         char *method_name = istate->method()->name_and_sig_as_C_string();
         if (strstr(method_name, "runThese$TestRunner.run()V") != NULL) {
           tty->print_cr("entering: depth %d bci: %d",
                          (istate->_stack_base - istate->_stack),
                          istate->_bcp - istate->_method->code_base());
           interesting = true;
         }
       }
 #endif // HACK
       // Lock method if synchronized.
       if (METHOD->is_synchronized()) {
         // oop rcvr = locals[0].j.r;
         oop rcvr;
         if (METHOD->is_static()) {
           rcvr = METHOD->constants()->pool_holder()->java_mirror();
         } else {
           rcvr = LOCALS_OBJECT(0);
           VERIFY_OOP(rcvr);
         }
         // The initial monitor is ours for the taking.
         // Monitor not filled in frame manager any longer as this caused race condition with biased locking.
         BasicObjectLock* mon = &istate->monitor_base()[-1];
         mon->set_obj(rcvr);
         bool success = false;
         uintptr_t epoch_mask_in_place = (uintptr_t)markOopDesc::epoch_mask_in_place;
         markOop mark = rcvr->mark();
         intptr_t hash = (intptr_t) markOopDesc::no_hash;
         // Implies UseBiasedLocking.
         if (mark->has_bias_pattern()) {
           uintptr_t thread_ident;
           uintptr_t anticipated_bias_locking_value;
           thread_ident = (uintptr_t)istate->thread();
           anticipated_bias_locking_value =
             (((uintptr_t)rcvr->klass()->prototype_header() | thread_ident) ^ (uintptr_t)mark) &
             ~((uintptr_t) markOopDesc::age_mask_in_place);
           if (anticipated_bias_locking_value == 0) {
             // Already biased towards this thread, nothing to do.
             if (PrintBiasedLockingStatistics) {
               (* BiasedLocking::biased_lock_entry_count_addr())++;
             }
             success = true;
           } else if ((anticipated_bias_locking_value & markOopDesc::biased_lock_mask_in_place) != 0) {
             // Try to revoke bias.
             markOop header = rcvr->klass()->prototype_header();
             if (hash != markOopDesc::no_hash) {
               header = header->copy_set_hash(hash);
             }
             if (Atomic::cmpxchg_ptr(header, rcvr->mark_addr(), mark) == mark) {
               if (PrintBiasedLockingStatistics)
                 (*BiasedLocking::revoked_lock_entry_count_addr())++;
             }
           } else if ((anticipated_bias_locking_value & epoch_mask_in_place) != 0) {
             // Try to rebias.
             markOop new_header = (markOop) ( (intptr_t) rcvr->klass()->prototype_header() | thread_ident);
             if (hash != markOopDesc::no_hash) {
               new_header = new_header->copy_set_hash(hash);
             }
             if (Atomic::cmpxchg_ptr((void*)new_header, rcvr->mark_addr(), mark) == mark) {
               if (PrintBiasedLockingStatistics) {
                 (* BiasedLocking::rebiased_lock_entry_count_addr())++;
               }
             } else {
               CALL_VM(InterpreterRuntime::monitorenter(THREAD, mon), handle_exception);
             }
             success = true;
           } else {
             // Try to bias towards thread in case object is anonymously biased.
             markOop header = (markOop) ((uintptr_t) mark &
                                         ((uintptr_t)markOopDesc::biased_lock_mask_in_place |
                                          (uintptr_t)markOopDesc::age_mask_in_place | epoch_mask_in_place));
             if (hash != markOopDesc::no_hash) {
               header = header->copy_set_hash(hash);
             }
             markOop new_header = (markOop) ((uintptr_t) header | thread_ident);
             // Debugging hint.
             DEBUG_ONLY(mon->lock()->set_displaced_header((markOop) (uintptr_t) 0xdeaddead);)
             if (Atomic::cmpxchg_ptr((void*)new_header, rcvr->mark_addr(), header) == header) {
               if (PrintBiasedLockingStatistics) {
                 (* BiasedLocking::anonymously_biased_lock_entry_count_addr())++;
               }
             } else {
               CALL_VM(InterpreterRuntime::monitorenter(THREAD, mon), handle_exception);
             }
             success = true;
           }
         }
         // Traditional lightweight locking.
         if (!success) {
           markOop displaced = rcvr->mark()->set_unlocked();
           mon->lock()->set_displaced_header(displaced);
           bool call_vm = UseHeavyMonitors;
           if (call_vm || Atomic::cmpxchg_ptr(mon, rcvr->mark_addr(), displaced) != displaced) {
             // Is it simple recursive case?
             if (!call_vm && THREAD->is_lock_owned((address) displaced->clear_lock_bits())) {
               mon->lock()->set_displaced_header(NULL);
             } else {
               CALL_VM(InterpreterRuntime::monitorenter(THREAD, mon), handle_exception);
             }
           }
         }
       }
       THREAD->clr_do_not_unlock();
       // Notify jvmti
 #ifdef VM_JVMTI
       if (_jvmti_interp_events) {
         // Whenever JVMTI puts a thread in interp_only_mode, method
         // entry/exit events are sent for that thread to track stack depth.
         if (THREAD->is_interp_only_mode()) {
           CALL_VM(InterpreterRuntime::post_method_entry(THREAD),
                   handle_exception);
         }
       }
 #endif /* VM_JVMTI */
       goto run;
     }
     case popping_frame: {
       // returned from a java call to pop the frame, restart the call
       // clear the message so we don't confuse ourselves later
       assert(THREAD->pop_frame_in_process(), "wrong frame pop state");
       istate->set_msg(no_request);
       if (_compiling) {
         // Set MDX back to the ProfileData of the invoke bytecode that will be
         // restarted.
         SET_MDX(NULL);
         BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception);
       }
       THREAD->clr_pop_frame_in_process();
       goto run;
     }
     case method_resume: {
       if ((istate->_stack_base - istate->_stack_limit) != istate->method()->max_stack() + 1) {
         // resume
         os::breakpoint();
       }
 #ifdef HACK
       {
         ResourceMark rm;
         char *method_name = istate->method()->name_and_sig_as_C_string();
         if (strstr(method_name, "runThese$TestRunner.run()V") != NULL) {
           tty->print_cr("resume: depth %d bci: %d",
                          (istate->_stack_base - istate->_stack) ,
                          istate->_bcp - istate->_method->code_base());
           interesting = true;
         }
       }
 #endif // HACK
       // returned from a java call, continue executing.
       if (THREAD->pop_frame_pending() && !THREAD->pop_frame_in_process()) {
         goto handle_Pop_Frame;
       }
       if (THREAD->jvmti_thread_state() &&
           THREAD->jvmti_thread_state()->is_earlyret_pending()) {
         goto handle_Early_Return;
       }
       if (THREAD->has_pending_exception()) goto handle_exception;
       // Update the pc by the saved amount of the invoke bytecode size
       UPDATE_PC(istate->bcp_advance());
       if (_compiling) {
         // Get or create profile data. Check for pending (async) exceptions.
         BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception);
       }
       goto run;
     }
     case deopt_resume2: {
       // Returned from an opcode that will reexecute. Deopt was
       // a result of a PopFrame request.
       //
       if (_compiling) {
         // Get or create profile data. Check for pending (async) exceptions.
         BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception);
       }
       goto run;
     }
     case deopt_resume: {
       // Returned from an opcode that has completed. The stack has
       // the result all we need to do is skip across the bytecode
       // and continue (assuming there is no exception pending)
       //
       // compute continuation length
       //
       // Note: it is possible to deopt at a return_register_finalizer opcode
       // because this requires entering the vm to do the registering. While the
       // opcode is complete we can't advance because there are no more opcodes
       // much like trying to deopt at a poll return. In that has we simply
       // get out of here
       //
       if ( Bytecodes::code_at(METHOD, pc) == Bytecodes::_return_register_finalizer) {
         // this will do the right thing even if an exception is pending.
         goto handle_return;
       }
       UPDATE_PC(Bytecodes::length_at(METHOD, pc));
       if (THREAD->has_pending_exception()) goto handle_exception;
       if (_compiling) {
         // Get or create profile data. Check for pending (async) exceptions.
         BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception);
       }
       goto run;
     }
     case got_monitors: {
       // continue locking now that we have a monitor to use
       // we expect to find newly allocated monitor at the "top" of the monitor stack.
       oop lockee = STACK_OBJECT(-1);
       VERIFY_OOP(lockee);
       // derefing's lockee ought to provoke implicit null check
       // find a free monitor
       BasicObjectLock* entry = (BasicObjectLock*) istate->stack_base();
       assert(entry->obj() == NULL, "Frame manager didn't allocate the monitor");
       entry->set_obj(lockee);
       bool success = false;
       uintptr_t epoch_mask_in_place = (uintptr_t)markOopDesc::epoch_mask_in_place;
       markOop mark = lockee->mark();
       intptr_t hash = (intptr_t) markOopDesc::no_hash;
       // implies UseBiasedLocking
       if (mark->has_bias_pattern()) {
         uintptr_t thread_ident;
         uintptr_t anticipated_bias_locking_value;
         thread_ident = (uintptr_t)istate->thread();
         anticipated_bias_locking_value =
           (((uintptr_t)lockee->klass()->prototype_header() | thread_ident) ^ (uintptr_t)mark) &
           ~((uintptr_t) markOopDesc::age_mask_in_place);
         if  (anticipated_bias_locking_value == 0) {
           // already biased towards this thread, nothing to do
           if (PrintBiasedLockingStatistics) {
             (* BiasedLocking::biased_lock_entry_count_addr())++;
           }
           success = true;
         } else if ((anticipated_bias_locking_value & markOopDesc::biased_lock_mask_in_place) != 0) {
           // try revoke bias
           markOop header = lockee->klass()->prototype_header();
           if (hash != markOopDesc::no_hash) {
             header = header->copy_set_hash(hash);
           }
           if (Atomic::cmpxchg_ptr(header, lockee->mark_addr(), mark) == mark) {
             if (PrintBiasedLockingStatistics) {
               (*BiasedLocking::revoked_lock_entry_count_addr())++;
             }
           }
         } else if ((anticipated_bias_locking_value & epoch_mask_in_place) !=0) {
           // try rebias
           markOop new_header = (markOop) ( (intptr_t) lockee->klass()->prototype_header() | thread_ident);
           if (hash != markOopDesc::no_hash) {
                 new_header = new_header->copy_set_hash(hash);
           }
           if (Atomic::cmpxchg_ptr((void*)new_header, lockee->mark_addr(), mark) == mark) {
             if (PrintBiasedLockingStatistics) {
               (* BiasedLocking::rebiased_lock_entry_count_addr())++;
             }
           } else {
             CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception);
           }
           success = true;
         } else {
           // try to bias towards thread in case object is anonymously biased
           markOop header = (markOop) ((uintptr_t) mark & ((uintptr_t)markOopDesc::biased_lock_mask_in_place |
                                                           (uintptr_t)markOopDesc::age_mask_in_place | epoch_mask_in_place));
           if (hash != markOopDesc::no_hash) {
             header = header->copy_set_hash(hash);
           }
           markOop new_header = (markOop) ((uintptr_t) header | thread_ident);
           // debugging hint
           DEBUG_ONLY(entry->lock()->set_displaced_header((markOop) (uintptr_t) 0xdeaddead);)
           if (Atomic::cmpxchg_ptr((void*)new_header, lockee->mark_addr(), header) == header) {
             if (PrintBiasedLockingStatistics) {
               (* BiasedLocking::anonymously_biased_lock_entry_count_addr())++;
             }
           } else {
             CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception);
           }
           success = true;
         }
       }
       // traditional lightweight locking
       if (!success) {
         markOop displaced = lockee->mark()->set_unlocked();
         entry->lock()->set_displaced_header(displaced);
         bool call_vm = UseHeavyMonitors;
         if (call_vm || Atomic::cmpxchg_ptr(entry, lockee->mark_addr(), displaced) != displaced) {
           // Is it simple recursive case?
           if (!call_vm && THREAD->is_lock_owned((address) displaced->clear_lock_bits())) {
             entry->lock()->set_displaced_header(NULL);
           } else {
             CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception);
           }
         }
       }
       UPDATE_PC_AND_TOS(1, -1);
       goto run;
     }
     default: {
       fatal("Unexpected message from frame manager");
     }
   }
 run:
   DO_UPDATE_INSTRUCTION_COUNT(*pc)
   DEBUGGER_SINGLE_STEP_NOTIFY();
 #ifdef PREFETCH_OPCCODE
   opcode = *pc;  /* prefetch first opcode */
 #endif
 #ifndef USELABELS
   while (1)
 #endif
   {
 #ifndef PREFETCH_OPCCODE
       opcode = *pc;
 #endif
       // Seems like this happens twice per opcode. At worst this is only
       // need at entry to the loop.
       // DEBUGGER_SINGLE_STEP_NOTIFY();
       /* Using this labels avoids double breakpoints when quickening and
        * when returing from transition frames.
        */
   opcode_switch:
       assert(istate == orig, "Corrupted istate");
       /* QQQ Hmm this has knowledge of direction, ought to be a stack method */
       assert(topOfStack >= istate->stack_limit(), "Stack overrun");
       assert(topOfStack < istate->stack_base(), "Stack underrun");
 #ifdef USELABELS
       DISPATCH(opcode);
 #else
       switch (opcode)
 #endif
       {
       CASE(_nop):
           UPDATE_PC_AND_CONTINUE(1);
           /* Push miscellaneous constants onto the stack. */
       CASE(_aconst_null):
           SET_STACK_OBJECT(NULL, 0);
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
 #undef  OPC_CONST_n
 #define OPC_CONST_n(opcode, const_type, value)                          \
       CASE(opcode):                                                     \
           SET_STACK_ ## const_type(value, 0);                           \
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
           OPC_CONST_n(_iconst_m1,   INT,       -1);
           OPC_CONST_n(_iconst_0,    INT,        0);
           OPC_CONST_n(_iconst_1,    INT,        1);
           OPC_CONST_n(_iconst_2,    INT,        2);
           OPC_CONST_n(_iconst_3,    INT,        3);
           OPC_CONST_n(_iconst_4,    INT,        4);
           OPC_CONST_n(_iconst_5,    INT,        5);
           OPC_CONST_n(_fconst_0,    FLOAT,      0.0);
           OPC_CONST_n(_fconst_1,    FLOAT,      1.0);
           OPC_CONST_n(_fconst_2,    FLOAT,      2.0);
 #undef  OPC_CONST2_n
 #define OPC_CONST2_n(opcname, value, key, kind)                         \
       CASE(_##opcname):                                                 \
       {                                                                 \
           SET_STACK_ ## kind(VM##key##Const##value(), 1);               \
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);                         \
       }
          OPC_CONST2_n(dconst_0, Zero, double, DOUBLE);
          OPC_CONST2_n(dconst_1, One,  double, DOUBLE);
          OPC_CONST2_n(lconst_0, Zero, long, LONG);
          OPC_CONST2_n(lconst_1, One,  long, LONG);
          /* Load constant from constant pool: */
           /* Push a 1-byte signed integer value onto the stack. */
       CASE(_bipush):
           SET_STACK_INT((jbyte)(pc[1]), 0);
           UPDATE_PC_AND_TOS_AND_CONTINUE(2, 1);
           /* Push a 2-byte signed integer constant onto the stack. */
       CASE(_sipush):
           SET_STACK_INT((int16_t)Bytes::get_Java_u2(pc + 1), 0);
           UPDATE_PC_AND_TOS_AND_CONTINUE(3, 1);
           /* load from local variable */
       CASE(_aload):
           VERIFY_OOP(LOCALS_OBJECT(pc[1]));
           SET_STACK_OBJECT(LOCALS_OBJECT(pc[1]), 0);
           UPDATE_PC_AND_TOS_AND_CONTINUE(2, 1);
       CASE(_iload):
       CASE(_fload):
           SET_STACK_SLOT(LOCALS_SLOT(pc[1]), 0);
           UPDATE_PC_AND_TOS_AND_CONTINUE(2, 1);
       CASE(_lload):
           SET_STACK_LONG_FROM_ADDR(LOCALS_LONG_AT(pc[1]), 1);
           UPDATE_PC_AND_TOS_AND_CONTINUE(2, 2);
       CASE(_dload):
           SET_STACK_DOUBLE_FROM_ADDR(LOCALS_DOUBLE_AT(pc[1]), 1);
           UPDATE_PC_AND_TOS_AND_CONTINUE(2, 2);
 #undef  OPC_LOAD_n
 #define OPC_LOAD_n(num)                                                 \
       CASE(_aload_##num):                                               \
           VERIFY_OOP(LOCALS_OBJECT(num));                               \
           SET_STACK_OBJECT(LOCALS_OBJECT(num), 0);                      \
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);                         \
                                                                         \
       CASE(_iload_##num):                                               \
       CASE(_fload_##num):                                               \
           SET_STACK_SLOT(LOCALS_SLOT(num), 0);                          \
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);                         \
                                                                         \
       CASE(_lload_##num):                                               \
           SET_STACK_LONG_FROM_ADDR(LOCALS_LONG_AT(num), 1);             \
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);                         \
       CASE(_dload_##num):                                               \
           SET_STACK_DOUBLE_FROM_ADDR(LOCALS_DOUBLE_AT(num), 1);         \
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
           OPC_LOAD_n(0);
           OPC_LOAD_n(1);
           OPC_LOAD_n(2);
           OPC_LOAD_n(3);
           /* store to a local variable */
       CASE(_astore):
           astore(topOfStack, -1, locals, pc[1]);
           UPDATE_PC_AND_TOS_AND_CONTINUE(2, -1);
       CASE(_istore):
       CASE(_fstore):
           SET_LOCALS_SLOT(STACK_SLOT(-1), pc[1]);
           UPDATE_PC_AND_TOS_AND_CONTINUE(2, -1);
       CASE(_lstore):
           SET_LOCALS_LONG(STACK_LONG(-1), pc[1]);
           UPDATE_PC_AND_TOS_AND_CONTINUE(2, -2);
       CASE(_dstore):
           SET_LOCALS_DOUBLE(STACK_DOUBLE(-1), pc[1]);
           UPDATE_PC_AND_TOS_AND_CONTINUE(2, -2);
       CASE(_wide): {
           uint16_t reg = Bytes::get_Java_u2(pc + 2);
           opcode = pc[1];
           // Wide and it's sub-bytecode are counted as separate instructions. If we
           // don't account for this here, the bytecode trace skips the next bytecode.
           DO_UPDATE_INSTRUCTION_COUNT(opcode);
           switch(opcode) {
               case Bytecodes::_aload:
                   VERIFY_OOP(LOCALS_OBJECT(reg));
                   SET_STACK_OBJECT(LOCALS_OBJECT(reg), 0);
                   UPDATE_PC_AND_TOS_AND_CONTINUE(4, 1);
               case Bytecodes::_iload:
               case Bytecodes::_fload:
                   SET_STACK_SLOT(LOCALS_SLOT(reg), 0);
                   UPDATE_PC_AND_TOS_AND_CONTINUE(4, 1);
               case Bytecodes::_lload:
                   SET_STACK_LONG_FROM_ADDR(LOCALS_LONG_AT(reg), 1);
                   UPDATE_PC_AND_TOS_AND_CONTINUE(4, 2);
               case Bytecodes::_dload:
                   SET_STACK_DOUBLE_FROM_ADDR(LOCALS_LONG_AT(reg), 1);
                   UPDATE_PC_AND_TOS_AND_CONTINUE(4, 2);
               case Bytecodes::_astore:
                   astore(topOfStack, -1, locals, reg);
                   UPDATE_PC_AND_TOS_AND_CONTINUE(4, -1);
               case Bytecodes::_istore:
               case Bytecodes::_fstore:
                   SET_LOCALS_SLOT(STACK_SLOT(-1), reg);
                   UPDATE_PC_AND_TOS_AND_CONTINUE(4, -1);
               case Bytecodes::_lstore:
                   SET_LOCALS_LONG(STACK_LONG(-1), reg);
                   UPDATE_PC_AND_TOS_AND_CONTINUE(4, -2);
               case Bytecodes::_dstore:
                   SET_LOCALS_DOUBLE(STACK_DOUBLE(-1), reg);
                   UPDATE_PC_AND_TOS_AND_CONTINUE(4, -2);
               case Bytecodes::_iinc: {
                   int16_t offset = (int16_t)Bytes::get_Java_u2(pc+4);
                   // Be nice to see what this generates.... QQQ
                   SET_LOCALS_INT(LOCALS_INT(reg) + offset, reg);
                   UPDATE_PC_AND_CONTINUE(6);
               }
               case Bytecodes::_ret:
                   // Profile ret.
                   BI_PROFILE_UPDATE_RET(/*bci=*/((int)(intptr_t)(LOCALS_ADDR(reg))));
                   // Now, update the pc.
                   pc = istate->method()->code_base() + (intptr_t)(LOCALS_ADDR(reg));
                   UPDATE_PC_AND_CONTINUE(0);
               default:
                   VM_JAVA_ERROR(vmSymbols::java_lang_InternalError(), "undefined opcode", note_no_trap);
           }
       }
 #undef  OPC_STORE_n
 #define OPC_STORE_n(num)                                                \
       CASE(_astore_##num):                                              \
           astore(topOfStack, -1, locals, num);                          \
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);                        \
       CASE(_istore_##num):                                              \
       CASE(_fstore_##num):                                              \
           SET_LOCALS_SLOT(STACK_SLOT(-1), num);                         \
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
           OPC_STORE_n(0);
           OPC_STORE_n(1);
           OPC_STORE_n(2);
           OPC_STORE_n(3);
 #undef  OPC_DSTORE_n
 #define OPC_DSTORE_n(num)                                               \
       CASE(_dstore_##num):                                              \
           SET_LOCALS_DOUBLE(STACK_DOUBLE(-1), num);                     \
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2);                        \
       CASE(_lstore_##num):                                              \
           SET_LOCALS_LONG(STACK_LONG(-1), num);                         \
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2);
           OPC_DSTORE_n(0);
           OPC_DSTORE_n(1);
           OPC_DSTORE_n(2);
           OPC_DSTORE_n(3);
           /* stack pop, dup, and insert opcodes */
       CASE(_pop):                /* Discard the top item on the stack */
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
       CASE(_pop2):               /* Discard the top 2 items on the stack */
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2);
       CASE(_dup):               /* Duplicate the top item on the stack */
           dup(topOfStack);
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
       CASE(_dup2):              /* Duplicate the top 2 items on the stack */
           dup2(topOfStack);
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
       CASE(_dup_x1):    /* insert top word two down */
           dup_x1(topOfStack);
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
       CASE(_dup_x2):    /* insert top word three down  */
           dup_x2(topOfStack);
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
       CASE(_dup2_x1):   /* insert top 2 slots three down */
           dup2_x1(topOfStack);
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
       CASE(_dup2_x2):   /* insert top 2 slots four down */
           dup2_x2(topOfStack);
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
       CASE(_swap): {        /* swap top two elements on the stack */
           swap(topOfStack);
           UPDATE_PC_AND_CONTINUE(1);
       }
           /* Perform various binary integer operations */
 #undef  OPC_INT_BINARY
 #define OPC_INT_BINARY(opcname, opname, test)                           \
       CASE(_i##opcname):                                                \
           if (test && (STACK_INT(-1) == 0)) {                           \
               VM_JAVA_ERROR(vmSymbols::java_lang_ArithmeticException(), \
                             "/ by zero", note_div0Check_trap);          \
           }                                                             \
           SET_STACK_INT(VMint##opname(STACK_INT(-2),                    \
                                       STACK_INT(-1)),                   \
                                       -2);                              \
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);                        \
       CASE(_l##opcname):                                                \
       {                                                                 \
           if (test) {                                                   \
             jlong l1 = STACK_LONG(-1);                                  \
             if (VMlongEqz(l1)) {                                        \
               VM_JAVA_ERROR(vmSymbols::java_lang_ArithmeticException(), \
                             "/ by long zero", note_div0Check_trap);     \
             }                                                           \
           }                                                             \
           /* First long at (-1,-2) next long at (-3,-4) */              \
           SET_STACK_LONG(VMlong##opname(STACK_LONG(-3),                 \
                                         STACK_LONG(-1)),                \
                                         -3);                            \
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2);                        \
       }
       OPC_INT_BINARY(add, Add, 0);
       OPC_INT_BINARY(sub, Sub, 0);
       OPC_INT_BINARY(mul, Mul, 0);
       OPC_INT_BINARY(and, And, 0);
       OPC_INT_BINARY(or,  Or,  0);
       OPC_INT_BINARY(xor, Xor, 0);
       OPC_INT_BINARY(div, Div, 1);
       OPC_INT_BINARY(rem, Rem, 1);
       /* Perform various binary floating number operations */
       /* On some machine/platforms/compilers div zero check can be implicit */
 #undef  OPC_FLOAT_BINARY
 #define OPC_FLOAT_BINARY(opcname, opname)                                  \
       CASE(_d##opcname): {                                                 \
           SET_STACK_DOUBLE(VMdouble##opname(STACK_DOUBLE(-3),              \
                                             STACK_DOUBLE(-1)),             \
                                             -3);                           \
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2);                           \
       }                                                                    \
       CASE(_f##opcname):                                                   \
           SET_STACK_FLOAT(VMfloat##opname(STACK_FLOAT(-2),                 \
                                           STACK_FLOAT(-1)),                \
                                           -2);                             \
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
      OPC_FLOAT_BINARY(add, Add);
      OPC_FLOAT_BINARY(sub, Sub);
      OPC_FLOAT_BINARY(mul, Mul);
      OPC_FLOAT_BINARY(div, Div);
      OPC_FLOAT_BINARY(rem, Rem);
       /* Shift operations
        * Shift left int and long: ishl, lshl
        * Logical shift right int and long w/zero extension: iushr, lushr
        * Arithmetic shift right int and long w/sign extension: ishr, lshr
        */
 #undef  OPC_SHIFT_BINARY
 #define OPC_SHIFT_BINARY(opcname, opname)                               \
       CASE(_i##opcname):                                                \
          SET_STACK_INT(VMint##opname(STACK_INT(-2),                     \
                                      STACK_INT(-1)),                    \
                                      -2);                               \
          UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);                         \
       CASE(_l##opcname):                                                \
       {                                                                 \
          SET_STACK_LONG(VMlong##opname(STACK_LONG(-2),                  \
                                        STACK_INT(-1)),                  \
                                        -2);                             \
          UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);                         \
       }
       OPC_SHIFT_BINARY(shl, Shl);
       OPC_SHIFT_BINARY(shr, Shr);
       OPC_SHIFT_BINARY(ushr, Ushr);
      /* Increment local variable by constant */
       CASE(_iinc):
       {
           // locals[pc[1]].j.i += (jbyte)(pc[2]);
           SET_LOCALS_INT(LOCALS_INT(pc[1]) + (jbyte)(pc[2]), pc[1]);
           UPDATE_PC_AND_CONTINUE(3);
       }
      /* negate the value on the top of the stack */
       CASE(_ineg):
          SET_STACK_INT(VMintNeg(STACK_INT(-1)), -1);
          UPDATE_PC_AND_CONTINUE(1);
       CASE(_fneg):
          SET_STACK_FLOAT(VMfloatNeg(STACK_FLOAT(-1)), -1);
          UPDATE_PC_AND_CONTINUE(1);
       CASE(_lneg):
       {
          SET_STACK_LONG(VMlongNeg(STACK_LONG(-1)), -1);
          UPDATE_PC_AND_CONTINUE(1);
       }
       CASE(_dneg):
       {
          SET_STACK_DOUBLE(VMdoubleNeg(STACK_DOUBLE(-1)), -1);
          UPDATE_PC_AND_CONTINUE(1);
       }
       /* Conversion operations */
       CASE(_i2f):       /* convert top of stack int to float */
          SET_STACK_FLOAT(VMint2Float(STACK_INT(-1)), -1);
          UPDATE_PC_AND_CONTINUE(1);
       CASE(_i2l):       /* convert top of stack int to long */
       {
           // this is ugly QQQ
           jlong r = VMint2Long(STACK_INT(-1));
           MORE_STACK(-1); // Pop
           SET_STACK_LONG(r, 1);
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
       }
       CASE(_i2d):       /* convert top of stack int to double */
       {
           // this is ugly QQQ (why cast to jlong?? )
           jdouble r = (jlong)STACK_INT(-1);
           MORE_STACK(-1); // Pop
           SET_STACK_DOUBLE(r, 1);
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
       }
       CASE(_l2i):       /* convert top of stack long to int */
       {
           jint r = VMlong2Int(STACK_LONG(-1));
           MORE_STACK(-2); // Pop
           SET_STACK_INT(r, 0);
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
       }
       CASE(_l2f):   /* convert top of stack long to float */
       {
           jlong r = STACK_LONG(-1);
           MORE_STACK(-2); // Pop
           SET_STACK_FLOAT(VMlong2Float(r), 0);
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
       }
       CASE(_l2d):       /* convert top of stack long to double */
       {
           jlong r = STACK_LONG(-1);
           MORE_STACK(-2); // Pop
           SET_STACK_DOUBLE(VMlong2Double(r), 1);
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
       }
       CASE(_f2i):  /* Convert top of stack float to int */
           SET_STACK_INT(SharedRuntime::f2i(STACK_FLOAT(-1)), -1);
           UPDATE_PC_AND_CONTINUE(1);
       CASE(_f2l):  /* convert top of stack float to long */
       {
           jlong r = SharedRuntime::f2l(STACK_FLOAT(-1));
           MORE_STACK(-1); // POP
           SET_STACK_LONG(r, 1);
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
       }
       CASE(_f2d):  /* convert top of stack float to double */
       {
           jfloat f;
           jdouble r;
           f = STACK_FLOAT(-1);
           r = (jdouble) f;
           MORE_STACK(-1); // POP
           SET_STACK_DOUBLE(r, 1);
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
       }
       CASE(_d2i): /* convert top of stack double to int */
       {
           jint r1 = SharedRuntime::d2i(STACK_DOUBLE(-1));
           MORE_STACK(-2);
           SET_STACK_INT(r1, 0);
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
       }
       CASE(_d2f): /* convert top of stack double to float */
       {
           jfloat r1 = VMdouble2Float(STACK_DOUBLE(-1));
           MORE_STACK(-2);
           SET_STACK_FLOAT(r1, 0);
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
       }
       CASE(_d2l): /* convert top of stack double to long */
       {
           jlong r1 = SharedRuntime::d2l(STACK_DOUBLE(-1));
           MORE_STACK(-2);
           SET_STACK_LONG(r1, 1);
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
       }
       CASE(_i2b):
           SET_STACK_INT(VMint2Byte(STACK_INT(-1)), -1);
           UPDATE_PC_AND_CONTINUE(1);
       CASE(_i2c):
           SET_STACK_INT(VMint2Char(STACK_INT(-1)), -1);
           UPDATE_PC_AND_CONTINUE(1);
       CASE(_i2s):
           SET_STACK_INT(VMint2Short(STACK_INT(-1)), -1);
           UPDATE_PC_AND_CONTINUE(1);
       /* comparison operators */
 #define COMPARISON_OP(name, comparison)                                      \
       CASE(_if_icmp##name): {                                                \
           const bool cmp = (STACK_INT(-2) comparison STACK_INT(-1));         \
           int skip = cmp                                                     \
                       ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3;             \
           address branch_pc = pc;                                            \
           /* Profile branch. */                                              \
           BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp);                        \
           UPDATE_PC_AND_TOS(skip, -2);                                       \
           DO_BACKEDGE_CHECKS(skip, branch_pc);                               \
           CONTINUE;                                                          \
       }                                                                      \
       CASE(_if##name): {                                                     \
           const bool cmp = (STACK_INT(-1) comparison 0);                     \
           int skip = cmp                                                     \
                       ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3;             \
           address branch_pc = pc;                                            \
           /* Profile branch. */                                              \
           BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp);                        \
           UPDATE_PC_AND_TOS(skip, -1);                                       \
           DO_BACKEDGE_CHECKS(skip, branch_pc);                               \
           CONTINUE;                                                          \
       }
 #define COMPARISON_OP2(name, comparison)                                     \
       COMPARISON_OP(name, comparison)                                        \
       CASE(_if_acmp##name): {                                                \
           const bool cmp = (STACK_OBJECT(-2) comparison STACK_OBJECT(-1));   \
           int skip = cmp                                                     \
                        ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3;            \
           address branch_pc = pc;                                            \
           /* Profile branch. */                                              \
           BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp);                        \
           UPDATE_PC_AND_TOS(skip, -2);                                       \
           DO_BACKEDGE_CHECKS(skip, branch_pc);                               \
           CONTINUE;                                                          \
       }
 #define NULL_COMPARISON_NOT_OP(name)                                         \
       CASE(_if##name): {                                                     \
           const bool cmp = (!(STACK_OBJECT(-1) == NULL));                    \
           int skip = cmp                                                     \
                       ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3;             \
           address branch_pc = pc;                                            \
           /* Profile branch. */                                              \
           BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp);                        \
           UPDATE_PC_AND_TOS(skip, -1);                                       \
           DO_BACKEDGE_CHECKS(skip, branch_pc);                               \
           CONTINUE;                                                          \
       }
 #define NULL_COMPARISON_OP(name)                                             \
       CASE(_if##name): {                                                     \
           const bool cmp = ((STACK_OBJECT(-1) == NULL));                     \
           int skip = cmp                                                     \
                       ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3;             \
           address branch_pc = pc;                                            \
           /* Profile branch. */                                              \
           BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp);                        \
           UPDATE_PC_AND_TOS(skip, -1);                                       \
           DO_BACKEDGE_CHECKS(skip, branch_pc);                               \
           CONTINUE;                                                          \
       }
       COMPARISON_OP(lt, <);
       COMPARISON_OP(gt, >);
       COMPARISON_OP(le, <=);
       COMPARISON_OP(ge, >=);
       COMPARISON_OP2(eq, ==);  /* include ref comparison */
       COMPARISON_OP2(ne, !=);  /* include ref comparison */
       NULL_COMPARISON_OP(null);
       NULL_COMPARISON_NOT_OP(nonnull);
       /* Goto pc at specified offset in switch table. */
       CASE(_tableswitch): {
           jint* lpc  = (jint*)VMalignWordUp(pc+1);
           int32_t  key  = STACK_INT(-1);
           int32_t  low  = Bytes::get_Java_u4((address)&lpc[1]);
           int32_t  high = Bytes::get_Java_u4((address)&lpc[2]);
           int32_t  skip;
           key -= low;
           if (((uint32_t) key > (uint32_t)(high - low))) {
             key = -1;
             skip = Bytes::get_Java_u4((address)&lpc[0]);
           } else {
             skip = Bytes::get_Java_u4((address)&lpc[key + 3]);
           }
           // Profile switch.
           BI_PROFILE_UPDATE_SWITCH(/*switch_index=*/key);
           // Does this really need a full backedge check (osr)?
           address branch_pc = pc;
           UPDATE_PC_AND_TOS(skip, -1);
           DO_BACKEDGE_CHECKS(skip, branch_pc);
           CONTINUE;
       }
       /* Goto pc whose table entry matches specified key. */
       CASE(_lookupswitch): {
           jint* lpc  = (jint*)VMalignWordUp(pc+1);
           int32_t  key  = STACK_INT(-1);
           int32_t  skip = Bytes::get_Java_u4((address) lpc); /* default amount */
           // Remember index.
           int      index = -1;
           int      newindex = 0;
           int32_t  npairs = Bytes::get_Java_u4((address) &lpc[1]);
           while (--npairs >= 0) {
             lpc += 2;
             if (key == (int32_t)Bytes::get_Java_u4((address)lpc)) {
               skip = Bytes::get_Java_u4((address)&lpc[1]);
               index = newindex;
               break;
             }
             newindex += 1;
           }
           // Profile switch.
           BI_PROFILE_UPDATE_SWITCH(/*switch_index=*/index);
           address branch_pc = pc;
           UPDATE_PC_AND_TOS(skip, -1);
           DO_BACKEDGE_CHECKS(skip, branch_pc);
           CONTINUE;
       }
       CASE(_fcmpl):
       CASE(_fcmpg):
       {
           SET_STACK_INT(VMfloatCompare(STACK_FLOAT(-2),
                                         STACK_FLOAT(-1),
                                         (opcode == Bytecodes::_fcmpl ? -1 : 1)),
                         -2);
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
       }
       CASE(_dcmpl):
       CASE(_dcmpg):
       {
           int r = VMdoubleCompare(STACK_DOUBLE(-3),
                                   STACK_DOUBLE(-1),
                                   (opcode == Bytecodes::_dcmpl ? -1 : 1));
           MORE_STACK(-4); // Pop
           SET_STACK_INT(r, 0);
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
       }
       CASE(_lcmp):
       {
           int r = VMlongCompare(STACK_LONG(-3), STACK_LONG(-1));
           MORE_STACK(-4);
           SET_STACK_INT(r, 0);
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
       }
       /* Return from a method */
       CASE(_areturn):
       CASE(_ireturn):
       CASE(_freturn):
       {
           // Allow a safepoint before returning to frame manager.
           SAFEPOINT;
           goto handle_return;
       }
       CASE(_lreturn):
       CASE(_dreturn):
       {
           // Allow a safepoint before returning to frame manager.
           SAFEPOINT;
           goto handle_return;
       }
       CASE(_return_register_finalizer): {
           oop rcvr = LOCALS_OBJECT(0);
           VERIFY_OOP(rcvr);
           if (rcvr->klass()->has_finalizer()) {
             CALL_VM(InterpreterRuntime::register_finalizer(THREAD, rcvr), handle_exception);
           }
           goto handle_return;
       }
       CASE(_return): {
           // Allow a safepoint before returning to frame manager.
           SAFEPOINT;
           goto handle_return;
       }
       /* Array access byte-codes */
       /* Every array access byte-code starts out like this */
 //        arrayOopDesc* arrObj = (arrayOopDesc*)STACK_OBJECT(arrayOff);
 #define ARRAY_INTRO(arrayOff)                                                  \
       arrayOop arrObj = (arrayOop)STACK_OBJECT(arrayOff);                      \
       jint     index  = STACK_INT(arrayOff + 1);                               \
       char message[jintAsStringSize];                                          \
       CHECK_NULL(arrObj);                                                      \
       if ((uint32_t)index >= (uint32_t)arrObj->length()) {                     \
           sprintf(message, "%d", index);                                       \
           VM_JAVA_ERROR(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), \
                         message, note_rangeCheck_trap);                        \
       }
       /* 32-bit loads. These handle conversion from < 32-bit types */
 #define ARRAY_LOADTO32(T, T2, format, stackRes, extra)                                \
       {                                                                               \
           ARRAY_INTRO(-2);                                                            \
           (void)extra;                                                                \
           SET_ ## stackRes(*(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)), \
                            -2);                                                       \
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);                                      \
       }
       /* 64-bit loads */
 #define ARRAY_LOADTO64(T,T2, stackRes, extra)                                              \
       {                                                                                    \
           ARRAY_INTRO(-2);                                                                 \
           SET_ ## stackRes(*(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)), -1); \
           (void)extra;                                                                     \
           UPDATE_PC_AND_CONTINUE(1);                                                       \
       }
       CASE(_iaload):
           ARRAY_LOADTO32(T_INT, jint,   "%d",   STACK_INT, 0);
       CASE(_faload):
           ARRAY_LOADTO32(T_FLOAT, jfloat, "%f",   STACK_FLOAT, 0);
       CASE(_aaload): {
           ARRAY_INTRO(-2);
           SET_STACK_OBJECT(((objArrayOop) arrObj)->obj_at(index), -2);
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
       }
       CASE(_baload):
           ARRAY_LOADTO32(T_BYTE, jbyte,  "%d",   STACK_INT, 0);
       CASE(_caload):
           ARRAY_LOADTO32(T_CHAR,  jchar, "%d",   STACK_INT, 0);
       CASE(_saload):
           ARRAY_LOADTO32(T_SHORT, jshort, "%d",   STACK_INT, 0);
       CASE(_laload):
           ARRAY_LOADTO64(T_LONG, jlong, STACK_LONG, 0);
       CASE(_daload):
           ARRAY_LOADTO64(T_DOUBLE, jdouble, STACK_DOUBLE, 0);
       /* 32-bit stores. These handle conversion to < 32-bit types */
 #define ARRAY_STOREFROM32(T, T2, format, stackSrc, extra)                            \
       {                                                                              \
           ARRAY_INTRO(-3);                                                           \
           (void)extra;                                                               \
           *(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)) = stackSrc( -1); \
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, -3);                                     \
       }
       /* 64-bit stores */
 #define ARRAY_STOREFROM64(T, T2, stackSrc, extra)                                    \
       {                                                                              \
           ARRAY_INTRO(-4);                                                           \
           (void)extra;                                                               \
           *(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)) = stackSrc( -1); \
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, -4);                                     \
       }
       CASE(_iastore):
           ARRAY_STOREFROM32(T_INT, jint,   "%d",   STACK_INT, 0);
       CASE(_fastore):
           ARRAY_STOREFROM32(T_FLOAT, jfloat, "%f",   STACK_FLOAT, 0);
       /*
        * This one looks different because of the assignability check
        */
       CASE(_aastore): {
           oop rhsObject = STACK_OBJECT(-1);
           VERIFY_OOP(rhsObject);
           ARRAY_INTRO( -3);
           // arrObj, index are set
           if (rhsObject != NULL) {
             /* Check assignability of rhsObject into arrObj */
             Klass* rhsKlass = rhsObject->klass(); // EBX (subclass)
             Klass* elemKlass = ObjArrayKlass::cast(arrObj->klass())->element_klass(); // superklass EAX
             //
             // Check for compatibilty. This check must not GC!!
             // Seems way more expensive now that we must dispatch
             //
             if (rhsKlass != elemKlass && !rhsKlass->is_subtype_of(elemKlass)) { // ebx->is...
               // Decrement counter if subtype check failed.
               BI_PROFILE_SUBTYPECHECK_FAILED(rhsKlass);
               VM_JAVA_ERROR(vmSymbols::java_lang_ArrayStoreException(), "", note_arrayCheck_trap);
             }
             // Profile checkcast with null_seen and receiver.
             BI_PROFILE_UPDATE_CHECKCAST(/*null_seen=*/false, rhsKlass);
           } else {
             // Profile checkcast with null_seen and receiver.
             BI_PROFILE_UPDATE_CHECKCAST(/*null_seen=*/true, NULL);
           }
           ((objArrayOop) arrObj)->obj_at_put(index, rhsObject);
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, -3);
       }
       CASE(_bastore):
           ARRAY_STOREFROM32(T_BYTE, jbyte,  "%d",   STACK_INT, 0);
       CASE(_castore):
           ARRAY_STOREFROM32(T_CHAR, jchar,  "%d",   STACK_INT, 0);
       CASE(_sastore):
           ARRAY_STOREFROM32(T_SHORT, jshort, "%d",   STACK_INT, 0);
       CASE(_lastore):
           ARRAY_STOREFROM64(T_LONG, jlong, STACK_LONG, 0);
       CASE(_dastore):
           ARRAY_STOREFROM64(T_DOUBLE, jdouble, STACK_DOUBLE, 0);
       CASE(_arraylength):
       {
           arrayOop ary = (arrayOop) STACK_OBJECT(-1);
           CHECK_NULL(ary);
           SET_STACK_INT(ary->length(), -1);
           UPDATE_PC_AND_CONTINUE(1);
       }
       /* monitorenter and monitorexit for locking/unlocking an object */
       CASE(_monitorenter): {
         oop lockee = STACK_OBJECT(-1);
         // derefing's lockee ought to provoke implicit null check
         CHECK_NULL(lockee);
         // find a free monitor or one already allocated for this object
         // if we find a matching object then we need a new monitor
         // since this is recursive enter
         BasicObjectLock* limit = istate->monitor_base();
         BasicObjectLock* most_recent = (BasicObjectLock*) istate->stack_base();
         BasicObjectLock* entry = NULL;
         while (most_recent != limit ) {
           if (most_recent->obj() == NULL) entry = most_recent;
           else if (most_recent->obj() == lockee) break;
           most_recent++;
         }
         if (entry != NULL) {
           entry->set_obj(lockee);
           int success = false;
           uintptr_t epoch_mask_in_place = (uintptr_t)markOopDesc::epoch_mask_in_place;
           markOop mark = lockee->mark();
           intptr_t hash = (intptr_t) markOopDesc::no_hash;
           // implies UseBiasedLocking
           if (mark->has_bias_pattern()) {
             uintptr_t thread_ident;
             uintptr_t anticipated_bias_locking_value;
             thread_ident = (uintptr_t)istate->thread();
             anticipated_bias_locking_value =
               (((uintptr_t)lockee->klass()->prototype_header() | thread_ident) ^ (uintptr_t)mark) &
               ~((uintptr_t) markOopDesc::age_mask_in_place);
             if  (anticipated_bias_locking_value == 0) {
               // already biased towards this thread, nothing to do
               if (PrintBiasedLockingStatistics) {
                 (* BiasedLocking::biased_lock_entry_count_addr())++;
               }
               success = true;
             }
             else if ((anticipated_bias_locking_value & markOopDesc::biased_lock_mask_in_place) != 0) {
               // try revoke bias
               markOop header = lockee->klass()->prototype_header();
               if (hash != markOopDesc::no_hash) {
                 header = header->copy_set_hash(hash);
               }
               if (Atomic::cmpxchg_ptr(header, lockee->mark_addr(), mark) == mark) {
                 if (PrintBiasedLockingStatistics)
                   (*BiasedLocking::revoked_lock_entry_count_addr())++;
               }
             }
             else if ((anticipated_bias_locking_value & epoch_mask_in_place) !=0) {
               // try rebias
               markOop new_header = (markOop) ( (intptr_t) lockee->klass()->prototype_header() | thread_ident);
               if (hash != markOopDesc::no_hash) {
                 new_header = new_header->copy_set_hash(hash);
               }
               if (Atomic::cmpxchg_ptr((void*)new_header, lockee->mark_addr(), mark) == mark) {
                 if (PrintBiasedLockingStatistics)
                   (* BiasedLocking::rebiased_lock_entry_count_addr())++;
               }
               else {
                 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception);
               }
               success = true;
             }
             else {
               // try to bias towards thread in case object is anonymously biased
               markOop header = (markOop) ((uintptr_t) mark & ((uintptr_t)markOopDesc::biased_lock_mask_in_place |
                                                               (uintptr_t)markOopDesc::age_mask_in_place |
                                                               epoch_mask_in_place));
               if (hash != markOopDesc::no_hash) {
                 header = header->copy_set_hash(hash);
               }
               markOop new_header = (markOop) ((uintptr_t) header | thread_ident);
               // debugging hint
               DEBUG_ONLY(entry->lock()->set_displaced_header((markOop) (uintptr_t) 0xdeaddead);)
               if (Atomic::cmpxchg_ptr((void*)new_header, lockee->mark_addr(), header) == header) {
                 if (PrintBiasedLockingStatistics)
                   (* BiasedLocking::anonymously_biased_lock_entry_count_addr())++;
               }
               else {
                 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception);
               }
               success = true;
             }
           }
           // traditional lightweight locking
           if (!success) {
             markOop displaced = lockee->mark()->set_unlocked();
             entry->lock()->set_displaced_header(displaced);
             bool call_vm = UseHeavyMonitors;
             if (call_vm || Atomic::cmpxchg_ptr(entry, lockee->mark_addr(), displaced) != displaced) {
               // Is it simple recursive case?
               if (!call_vm && THREAD->is_lock_owned((address) displaced->clear_lock_bits())) {
                 entry->lock()->set_displaced_header(NULL);
               } else {
                 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception);
               }
             }
           }
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
         } else {
           istate->set_msg(more_monitors);
           UPDATE_PC_AND_RETURN(0); // Re-execute
         }
       }
       CASE(_monitorexit): {
         oop lockee = STACK_OBJECT(-1);
         CHECK_NULL(lockee);
         // derefing's lockee ought to provoke implicit null check
         // find our monitor slot
         BasicObjectLock* limit = istate->monitor_base();
         BasicObjectLock* most_recent = (BasicObjectLock*) istate->stack_base();
         while (most_recent != limit ) {
           if ((most_recent)->obj() == lockee) {
             BasicLock* lock = most_recent->lock();
             markOop header = lock->displaced_header();
             most_recent->set_obj(NULL);
             if (!lockee->mark()->has_bias_pattern()) {
               bool call_vm = UseHeavyMonitors;
               // If it isn't recursive we either must swap old header or call the runtime
               if (header != NULL || call_vm) {
                 if (call_vm || Atomic::cmpxchg_ptr(header, lockee->mark_addr(), lock) != lock) {
                   // restore object for the slow case
                   most_recent->set_obj(lockee);
                   CALL_VM(InterpreterRuntime::monitorexit(THREAD, most_recent), handle_exception);
                 }
               }
             }
             UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
           }
           most_recent++;
         }
         // Need to throw illegal monitor state exception
         CALL_VM(InterpreterRuntime::throw_illegal_monitor_state_exception(THREAD), handle_exception);
         ShouldNotReachHere();
       }
       /* All of the non-quick opcodes. */
       /* -Set clobbersCpIndex true if the quickened opcode clobbers the
        *  constant pool index in the instruction.
        */
       CASE(_getfield):
       CASE(_getstatic):
         {
           u2 index;
           ConstantPoolCacheEntry* cache;
           index = Bytes::get_native_u2(pc+1);
           // QQQ Need to make this as inlined as possible. Probably need to
           // split all the bytecode cases out so c++ compiler has a chance
           // for constant prop to fold everything possible away.
           cache = cp->entry_at(index);
           if (!cache->is_resolved((Bytecodes::Code)opcode)) {
             CALL_VM(InterpreterRuntime::resolve_get_put(THREAD, (Bytecodes::Code)opcode),
                     handle_exception);
             cache = cp->entry_at(index);
           }
 #ifdef VM_JVMTI
           if (_jvmti_interp_events) {
             int *count_addr;
             oop obj;
             // Check to see if a field modification watch has been set
             // before we take the time to call into the VM.
             count_addr = (int *)JvmtiExport::get_field_access_count_addr();
             if ( *count_addr > 0 ) {
               if ((Bytecodes::Code)opcode == Bytecodes::_getstatic) {
                 obj = (oop)NULL;
               } else {
                 obj = (oop) STACK_OBJECT(-1);
                 VERIFY_OOP(obj);
               }
               CALL_VM(InterpreterRuntime::post_field_access(THREAD,
                                           obj,
                                           cache),
                                           handle_exception);
             }
           }
 #endif /* VM_JVMTI */
           oop obj;
           if ((Bytecodes::Code)opcode == Bytecodes::_getstatic) {
             Klass* k = cache->f1_as_klass();
             obj = k->java_mirror();
             MORE_STACK(1);  // Assume single slot push
           } else {
             obj = (oop) STACK_OBJECT(-1);
             CHECK_NULL(obj);
           }
           //
           // Now store the result on the stack
           //
           TosState tos_type = cache->flag_state();
           int field_offset = cache->f2_as_index();
           if (cache->is_volatile()) {
             if (tos_type == atos) {
               VERIFY_OOP(obj->obj_field_acquire(field_offset));
               SET_STACK_OBJECT(obj->obj_field_acquire(field_offset), -1);
             } else if (tos_type == itos) {
               SET_STACK_INT(obj->int_field_acquire(field_offset), -1);
             } else if (tos_type == ltos) {
               SET_STACK_LONG(obj->long_field_acquire(field_offset), 0);
               MORE_STACK(1);
             } else if (tos_type == btos) {
               SET_STACK_INT(obj->byte_field_acquire(field_offset), -1);
             } else if (tos_type == ctos) {
               SET_STACK_INT(obj->char_field_acquire(field_offset), -1);
             } else if (tos_type == stos) {
               SET_STACK_INT(obj->short_field_acquire(field_offset), -1);
             } else if (tos_type == ftos) {
               SET_STACK_FLOAT(obj->float_field_acquire(field_offset), -1);
             } else {
               SET_STACK_DOUBLE(obj->double_field_acquire(field_offset), 0);
               MORE_STACK(1);
             }
           } else {
             if (tos_type == atos) {
               VERIFY_OOP(obj->obj_field(field_offset));
               SET_STACK_OBJECT(obj->obj_field(field_offset), -1);
             } else if (tos_type == itos) {
               SET_STACK_INT(obj->int_field(field_offset), -1);
             } else if (tos_type == ltos) {
               SET_STACK_LONG(obj->long_field(field_offset), 0);
               MORE_STACK(1);
             } else if (tos_type == btos) {
               SET_STACK_INT(obj->byte_field(field_offset), -1);
             } else if (tos_type == ctos) {
               SET_STACK_INT(obj->char_field(field_offset), -1);
             } else if (tos_type == stos) {
               SET_STACK_INT(obj->short_field(field_offset), -1);
             } else if (tos_type == ftos) {
               SET_STACK_FLOAT(obj->float_field(field_offset), -1);
             } else {
               SET_STACK_DOUBLE(obj->double_field(field_offset), 0);
               MORE_STACK(1);
             }
           }
           UPDATE_PC_AND_CONTINUE(3);
          }
       CASE(_putfield):
       CASE(_putstatic):
         {
           u2 index = Bytes::get_native_u2(pc+1);
           ConstantPoolCacheEntry* cache = cp->entry_at(index);
           if (!cache->is_resolved((Bytecodes::Code)opcode)) {
             CALL_VM(InterpreterRuntime::resolve_get_put(THREAD, (Bytecodes::Code)opcode),
                     handle_exception);
             cache = cp->entry_at(index);
           }
 #ifdef VM_JVMTI
           if (_jvmti_interp_events) {
             int *count_addr;
             oop obj;
             // Check to see if a field modification watch has been set
             // before we take the time to call into the VM.
             count_addr = (int *)JvmtiExport::get_field_modification_count_addr();
             if ( *count_addr > 0 ) {
               if ((Bytecodes::Code)opcode == Bytecodes::_putstatic) {
                 obj = (oop)NULL;
               }
               else {
                 if (cache->is_long() || cache->is_double()) {
                   obj = (oop) STACK_OBJECT(-3);
                 } else {
                   obj = (oop) STACK_OBJECT(-2);
                 }
                 VERIFY_OOP(obj);
               }
               CALL_VM(InterpreterRuntime::post_field_modification(THREAD,
                                           obj,
                                           cache,
                                           (jvalue *)STACK_SLOT(-1)),
                                           handle_exception);
             }
           }
 #endif /* VM_JVMTI */
           // QQQ Need to make this as inlined as possible. Probably need to split all the bytecode cases
           // out so c++ compiler has a chance for constant prop to fold everything possible away.
           oop obj;
           int count;
           TosState tos_type = cache->flag_state();
           count = -1;
           if (tos_type == ltos || tos_type == dtos) {
             --count;
           }
           if ((Bytecodes::Code)opcode == Bytecodes::_putstatic) {
             Klass* k = cache->f1_as_klass();
             obj = k->java_mirror();
           } else {
             --count;
             obj = (oop) STACK_OBJECT(count);
             CHECK_NULL(obj);
           }
           //
           // Now store the result
           //
           int field_offset = cache->f2_as_index();
           if (cache->is_volatile()) {
             if (tos_type == itos) {
               obj->release_int_field_put(field_offset, STACK_INT(-1));
             } else if (tos_type == atos) {
               VERIFY_OOP(STACK_OBJECT(-1));
               obj->release_obj_field_put(field_offset, STACK_OBJECT(-1));
             } else if (tos_type == btos) {
               obj->release_byte_field_put(field_offset, STACK_INT(-1));
             } else if (tos_type == ltos) {
               obj->release_long_field_put(field_offset, STACK_LONG(-1));
             } else if (tos_type == ctos) {
               obj->release_char_field_put(field_offset, STACK_INT(-1));
             } else if (tos_type == stos) {
               obj->release_short_field_put(field_offset, STACK_INT(-1));
             } else if (tos_type == ftos) {
               obj->release_float_field_put(field_offset, STACK_FLOAT(-1));
             } else {
               obj->release_double_field_put(field_offset, STACK_DOUBLE(-1));
             }
             OrderAccess::storeload();
           } else {
             if (tos_type == itos) {
               obj->int_field_put(field_offset, STACK_INT(-1));
             } else if (tos_type == atos) {
               VERIFY_OOP(STACK_OBJECT(-1));
               obj->obj_field_put(field_offset, STACK_OBJECT(-1));
             } else if (tos_type == btos) {
               obj->byte_field_put(field_offset, STACK_INT(-1));
             } else if (tos_type == ltos) {
               obj->long_field_put(field_offset, STACK_LONG(-1));
             } else if (tos_type == ctos) {
               obj->char_field_put(field_offset, STACK_INT(-1));
             } else if (tos_type == stos) {
               obj->short_field_put(field_offset, STACK_INT(-1));
             } else if (tos_type == ftos) {
               obj->float_field_put(field_offset, STACK_FLOAT(-1));
             } else {
               obj->double_field_put(field_offset, STACK_DOUBLE(-1));
             }
           }
           UPDATE_PC_AND_TOS_AND_CONTINUE(3, count);
         }
       CASE(_new): {
         u2 index = Bytes::get_Java_u2(pc+1);
         ConstantPool* constants = istate->method()->constants();
         if (!constants->tag_at(index).is_unresolved_klass()) {
           // Make sure klass is initialized and doesn't have a finalizer
           Klass* entry = constants->slot_at(index).get_klass();
           assert(entry->is_klass(), "Should be resolved klass");
           Klass* k_entry = (Klass*) entry;
           assert(k_entry->oop_is_instance(), "Should be InstanceKlass");
           InstanceKlass* ik = (InstanceKlass*) k_entry;
           if ( ik->is_initialized() && ik->can_be_fastpath_allocated() ) {
             size_t obj_size = ik->size_helper();
             oop result = NULL;
             // If the TLAB isn't pre-zeroed then we'll have to do it
             bool need_zero = !ZeroTLAB;
             if (UseTLAB) {
               result = (oop) THREAD->tlab().allocate(obj_size);
             }
             // Disable non-TLAB-based fast-path, because profiling requires that all
             // allocations go through InterpreterRuntime::_new() if THREAD->tlab().allocate
             // returns NULL.
 #ifndef CC_INTERP_PROFILE
             if (result == NULL) {
               need_zero = true;
               // Try allocate in shared eden
             retry:
               HeapWord* compare_to = *Universe::heap()->top_addr();
               HeapWord* new_top = compare_to + obj_size;
               if (new_top <= *Universe::heap()->end_addr()) {
                 if (Atomic::cmpxchg_ptr(new_top, Universe::heap()->top_addr(), compare_to) != compare_to) {
                   goto retry;
                 }
                 result = (oop) compare_to;
               }
             }
 #endif
             if (result != NULL) {
               // Initialize object (if nonzero size and need) and then the header
               if (need_zero ) {
                 HeapWord* to_zero = (HeapWord*) result + sizeof(oopDesc) / oopSize;
                 obj_size -= sizeof(oopDesc) / oopSize;
                 if (obj_size > 0 ) {
                   memset(to_zero, 0, obj_size * HeapWordSize);
                 }
               }
               if (UseBiasedLocking) {
                 result->set_mark(ik->prototype_header());
               } else {
                 result->set_mark(markOopDesc::prototype());
               }
               result->set_klass_gap(0);
               result->set_klass(k_entry);
               SET_STACK_OBJECT(result, 0);
               UPDATE_PC_AND_TOS_AND_CONTINUE(3, 1);
             }
           }
         }
         // Slow case allocation
         CALL_VM(InterpreterRuntime::_new(THREAD, METHOD->constants(), index),
                 handle_exception);
         SET_STACK_OBJECT(THREAD->vm_result(), 0);
         THREAD->set_vm_result(NULL);
         UPDATE_PC_AND_TOS_AND_CONTINUE(3, 1);
       }
       CASE(_anewarray): {
         u2 index = Bytes::get_Java_u2(pc+1);
         jint size = STACK_INT(-1);
         CALL_VM(InterpreterRuntime::anewarray(THREAD, METHOD->constants(), index, size),
                 handle_exception);
         SET_STACK_OBJECT(THREAD->vm_result(), -1);
         THREAD->set_vm_result(NULL);
         UPDATE_PC_AND_CONTINUE(3);
       }
       CASE(_multianewarray): {
         jint dims = *(pc+3);
         jint size = STACK_INT(-1);
         // stack grows down, dimensions are up!
         jint *dimarray =
                    (jint*)&topOfStack[dims * Interpreter::stackElementWords+
                                       Interpreter::stackElementWords-1];
         //adjust pointer to start of stack element
         CALL_VM(InterpreterRuntime::multianewarray(THREAD, dimarray),
                 handle_exception);
         SET_STACK_OBJECT(THREAD->vm_result(), -dims);
         THREAD->set_vm_result(NULL);
         UPDATE_PC_AND_TOS_AND_CONTINUE(4, -(dims-1));
       }
       CASE(_checkcast):
           if (STACK_OBJECT(-1) != NULL) {
             VERIFY_OOP(STACK_OBJECT(-1));
             u2 index = Bytes::get_Java_u2(pc+1);
             // Constant pool may have actual klass or unresolved klass. If it is
             // unresolved we must resolve it.
             if (METHOD->constants()->tag_at(index).is_unresolved_klass()) {
               CALL_VM(InterpreterRuntime::quicken_io_cc(THREAD), handle_exception);
             }
             Klass* klassOf = (Klass*) METHOD->constants()->slot_at(index).get_klass();
             Klass* objKlass = STACK_OBJECT(-1)->klass(); // ebx
             //
             // Check for compatibilty. This check must not GC!!
             // Seems way more expensive now that we must dispatch.
             //
             if (objKlass != klassOf && !objKlass->is_subtype_of(klassOf)) {
               // Decrement counter at checkcast.
               BI_PROFILE_SUBTYPECHECK_FAILED(objKlass);
               ResourceMark rm(THREAD);
               const char* objName = objKlass->external_name();
               const char* klassName = klassOf->external_name();
               char* message = SharedRuntime::generate_class_cast_message(
                 objName, klassName);
               VM_JAVA_ERROR(vmSymbols::java_lang_ClassCastException(), message, note_classCheck_trap);
             }
             // Profile checkcast with null_seen and receiver.
             BI_PROFILE_UPDATE_CHECKCAST(/*null_seen=*/false, objKlass);
           } else {
             // Profile checkcast with null_seen and receiver.
             BI_PROFILE_UPDATE_CHECKCAST(/*null_seen=*/true, NULL);
           }
           UPDATE_PC_AND_CONTINUE(3);
       CASE(_instanceof):
           if (STACK_OBJECT(-1) == NULL) {
             SET_STACK_INT(0, -1);
             // Profile instanceof with null_seen and receiver.
             BI_PROFILE_UPDATE_INSTANCEOF(/*null_seen=*/true, NULL);
           } else {
             VERIFY_OOP(STACK_OBJECT(-1));
             u2 index = Bytes::get_Java_u2(pc+1);
             // Constant pool may have actual klass or unresolved klass. If it is
             // unresolved we must resolve it.
             if (METHOD->constants()->tag_at(index).is_unresolved_klass()) {
               CALL_VM(InterpreterRuntime::quicken_io_cc(THREAD), handle_exception);
             }
             Klass* klassOf = (Klass*) METHOD->constants()->slot_at(index).get_klass();
             Klass* objKlass = STACK_OBJECT(-1)->klass();
             //
             // Check for compatibilty. This check must not GC!!
             // Seems way more expensive now that we must dispatch.
             //
             if ( objKlass == klassOf || objKlass->is_subtype_of(klassOf)) {
               SET_STACK_INT(1, -1);
             } else {
               SET_STACK_INT(0, -1);
               // Decrement counter at checkcast.
               BI_PROFILE_SUBTYPECHECK_FAILED(objKlass);
             }
             // Profile instanceof with null_seen and receiver.
             BI_PROFILE_UPDATE_INSTANCEOF(/*null_seen=*/false, objKlass);
           }
           UPDATE_PC_AND_CONTINUE(3);
       CASE(_ldc_w):
       CASE(_ldc):
         {
           u2 index;
           bool wide = false;
           int incr = 2; // frequent case
           if (opcode == Bytecodes::_ldc) {
             index = pc[1];
           } else {
             index = Bytes::get_Java_u2(pc+1);
             incr = 3;
             wide = true;
           }
           ConstantPool* constants = METHOD->constants();
           switch (constants->tag_at(index).value()) {
           case JVM_CONSTANT_Integer:
             SET_STACK_INT(constants->int_at(index), 0);
             break;
           case JVM_CONSTANT_Float:
             SET_STACK_FLOAT(constants->float_at(index), 0);
             break;
           case JVM_CONSTANT_String:
             {
               oop result = constants->resolved_references()->obj_at(index);
               if (result == NULL) {
                 CALL_VM(InterpreterRuntime::resolve_ldc(THREAD, (Bytecodes::Code) opcode), handle_exception);
                 SET_STACK_OBJECT(THREAD->vm_result(), 0);
                 THREAD->set_vm_result(NULL);
               } else {
                 VERIFY_OOP(result);
                 SET_STACK_OBJECT(result, 0);
               }
             break;
             }
           case JVM_CONSTANT_Class:
             VERIFY_OOP(constants->resolved_klass_at(index)->java_mirror());
             SET_STACK_OBJECT(constants->resolved_klass_at(index)->java_mirror(), 0);
             break;
           case JVM_CONSTANT_UnresolvedClass:
           case JVM_CONSTANT_UnresolvedClassInError:
             CALL_VM(InterpreterRuntime::ldc(THREAD, wide), handle_exception);
             SET_STACK_OBJECT(THREAD->vm_result(), 0);
             THREAD->set_vm_result(NULL);
             break;
           default:  ShouldNotReachHere();
           }
           UPDATE_PC_AND_TOS_AND_CONTINUE(incr, 1);
         }
       CASE(_ldc2_w):
         {
           u2 index = Bytes::get_Java_u2(pc+1);
           ConstantPool* constants = METHOD->constants();
           switch (constants->tag_at(index).value()) {
           case JVM_CONSTANT_Long:
              SET_STACK_LONG(constants->long_at(index), 1);
             break;
           case JVM_CONSTANT_Double:
              SET_STACK_DOUBLE(constants->double_at(index), 1);
             break;
           default:  ShouldNotReachHere();
           }
           UPDATE_PC_AND_TOS_AND_CONTINUE(3, 2);
         }
       CASE(_fast_aldc_w):
       CASE(_fast_aldc): {
         u2 index;
         int incr;
         if (opcode == Bytecodes::_fast_aldc) {
           index = pc[1];
           incr = 2;
         } else {
           index = Bytes::get_native_u2(pc+1);
           incr = 3;
         }
         // We are resolved if the f1 field contains a non-null object (CallSite, etc.)
         // This kind of CP cache entry does not need to match the flags byte, because
         // there is a 1-1 relation between bytecode type and CP entry type.
         ConstantPool* constants = METHOD->constants();
         oop result = constants->resolved_references()->obj_at(index);
         if (result == NULL) {
           CALL_VM(InterpreterRuntime::resolve_ldc(THREAD, (Bytecodes::Code) opcode),
                   handle_exception);
           result = THREAD->vm_result();
         }
         VERIFY_OOP(result);
         SET_STACK_OBJECT(result, 0);
         UPDATE_PC_AND_TOS_AND_CONTINUE(incr, 1);
       }
       CASE(_invokedynamic): {
         if (!EnableInvokeDynamic) {
           // We should not encounter this bytecode if !EnableInvokeDynamic.
           // The verifier will stop it.  However, if we get past the verifier,
           // this will stop the thread in a reasonable way, without crashing the JVM.
           CALL_VM(InterpreterRuntime::throw_IncompatibleClassChangeError(THREAD),
                   handle_exception);
           ShouldNotReachHere();
         }
         u4 index = Bytes::get_native_u4(pc+1);
         ConstantPoolCacheEntry* cache = cp->constant_pool()->invokedynamic_cp_cache_entry_at(index);
         // We are resolved if the resolved_references field contains a non-null object (CallSite, etc.)
         // This kind of CP cache entry does not need to match the flags byte, because
         // there is a 1-1 relation between bytecode type and CP entry type.
         if (! cache->is_resolved((Bytecodes::Code) opcode)) {
           CALL_VM(InterpreterRuntime::resolve_invokedynamic(THREAD),
                   handle_exception);
           cache = cp->constant_pool()->invokedynamic_cp_cache_entry_at(index);
         }
         Method* method = cache->f1_as_method();
         if (VerifyOops) method->verify();
         if (cache->has_appendix()) {
           ConstantPool* constants = METHOD->constants();
           SET_STACK_OBJECT(cache->appendix_if_resolved(constants), 0);
           MORE_STACK(1);
         }
         istate->set_msg(call_method);
         istate->set_callee(method);
         istate->set_callee_entry_point(method->from_interpreted_entry());
         istate->set_bcp_advance(5);
         // Invokedynamic has got a call counter, just like an invokestatic -> increment!
         BI_PROFILE_UPDATE_CALL();
         UPDATE_PC_AND_RETURN(0); // I'll be back...
       }
       CASE(_invokehandle): {
         if (!EnableInvokeDynamic) {
           ShouldNotReachHere();
         }
         u2 index = Bytes::get_native_u2(pc+1);
         ConstantPoolCacheEntry* cache = cp->entry_at(index);
         if (! cache->is_resolved((Bytecodes::Code) opcode)) {
           CALL_VM(InterpreterRuntime::resolve_invokehandle(THREAD),
                   handle_exception);
           cache = cp->entry_at(index);
         }
         Method* method = cache->f1_as_method();
         if (VerifyOops) method->verify();
         if (cache->has_appendix()) {
           ConstantPool* constants = METHOD->constants();
           SET_STACK_OBJECT(cache->appendix_if_resolved(constants), 0);
           MORE_STACK(1);
         }
         istate->set_msg(call_method);
         istate->set_callee(method);
         istate->set_callee_entry_point(method->from_interpreted_entry());
         istate->set_bcp_advance(3);
         // Invokehandle has got a call counter, just like a final call -> increment!
         BI_PROFILE_UPDATE_FINALCALL();
         UPDATE_PC_AND_RETURN(0); // I'll be back...
       }
       CASE(_invokeinterface): {
         u2 index = Bytes::get_native_u2(pc+1);
         // QQQ Need to make this as inlined as possible. Probably need to split all the bytecode cases
         // out so c++ compiler has a chance for constant prop to fold everything possible away.
         ConstantPoolCacheEntry* cache = cp->entry_at(index);
         if (!cache->is_resolved((Bytecodes::Code)opcode)) {
           CALL_VM(InterpreterRuntime::resolve_invoke(THREAD, (Bytecodes::Code)opcode),
                   handle_exception);
           cache = cp->entry_at(index);
         }
         istate->set_msg(call_method);
         // Special case of invokeinterface called for virtual method of
         // java.lang.Object.  See cpCacheOop.cpp for details.
         // This code isn't produced by javac, but could be produced by
         // another compliant java compiler.
         if (cache->is_forced_virtual()) {
           Method* callee;
           CHECK_NULL(STACK_OBJECT(-(cache->parameter_size())));
           if (cache->is_vfinal()) {
             callee = cache->f2_as_vfinal_method();
             // Profile 'special case of invokeinterface' final call.
             BI_PROFILE_UPDATE_FINALCALL();
           } else {
             // Get receiver.
             int parms = cache->parameter_size();
             // Same comments as invokevirtual apply here.
             oop rcvr = STACK_OBJECT(-parms);
             VERIFY_OOP(rcvr);
             InstanceKlass* rcvrKlass = (InstanceKlass*)rcvr->klass();
             callee = (Method*) rcvrKlass->start_of_vtable()[ cache->f2_as_index()];
             // Profile 'special case of invokeinterface' virtual call.
             BI_PROFILE_UPDATE_VIRTUALCALL(rcvr->klass());
           }
           istate->set_callee(callee);
           istate->set_callee_entry_point(callee->from_interpreted_entry());
 #ifdef VM_JVMTI
           if (JvmtiExport::can_post_interpreter_events() && THREAD->is_interp_only_mode()) {
             istate->set_callee_entry_point(callee->interpreter_entry());
           }
 #endif /* VM_JVMTI */
           istate->set_bcp_advance(5);
           UPDATE_PC_AND_RETURN(0); // I'll be back...
         }
         // this could definitely be cleaned up QQQ
         Method* callee;
         Klass* iclass = cache->f1_as_klass();
         // InstanceKlass* interface = (InstanceKlass*) iclass;
         // get receiver
         int parms = cache->parameter_size();
         oop rcvr = STACK_OBJECT(-parms);
         CHECK_NULL(rcvr);
         InstanceKlass* int2 = (InstanceKlass*) rcvr->klass();
         itableOffsetEntry* ki = (itableOffsetEntry*) int2->start_of_itable();
         int i;
         for ( i = 0 ; i < int2->itable_length() ; i++, ki++ ) {
           if (ki->interface_klass() == iclass) break;
         }
         // If the interface isn't found, this class doesn't implement this
         // interface.  The link resolver checks this but only for the first
         // time this interface is called.
         if (i == int2->itable_length()) {
           VM_JAVA_ERROR(vmSymbols::java_lang_IncompatibleClassChangeError(), "", note_no_trap);
         }
         int mindex = cache->f2_as_index();
         itableMethodEntry* im = ki->first_method_entry(rcvr->klass());
         callee = im[mindex].method();
         if (callee == NULL) {
           VM_JAVA_ERROR(vmSymbols::java_lang_AbstractMethodError(), "", note_no_trap);
         }
         // Profile virtual call.
         BI_PROFILE_UPDATE_VIRTUALCALL(rcvr->klass());
         istate->set_callee(callee);
         istate->set_callee_entry_point(callee->from_interpreted_entry());
 #ifdef VM_JVMTI
         if (JvmtiExport::can_post_interpreter_events() && THREAD->is_interp_only_mode()) {
           istate->set_callee_entry_point(callee->interpreter_entry());
         }
 #endif /* VM_JVMTI */
         istate->set_bcp_advance(5);
         UPDATE_PC_AND_RETURN(0); // I'll be back...
       }
       CASE(_invokevirtual):
       CASE(_invokespecial):
       CASE(_invokestatic): {
         u2 index = Bytes::get_native_u2(pc+1);
         ConstantPoolCacheEntry* cache = cp->entry_at(index);
         // QQQ Need to make this as inlined as possible. Probably need to split all the bytecode cases
         // out so c++ compiler has a chance for constant prop to fold everything possible away.
         if (!cache->is_resolved((Bytecodes::Code)opcode)) {
           CALL_VM(InterpreterRuntime::resolve_invoke(THREAD, (Bytecodes::Code)opcode),
                   handle_exception);
           cache = cp->entry_at(index);
         }
         istate->set_msg(call_method);
         {
           Method* callee;
           if ((Bytecodes::Code)opcode == Bytecodes::_invokevirtual) {
             CHECK_NULL(STACK_OBJECT(-(cache->parameter_size())));
             if (cache->is_vfinal()) {
               callee = cache->f2_as_vfinal_method();
               // Profile final call.
               BI_PROFILE_UPDATE_FINALCALL();
             } else {
               // get receiver
               int parms = cache->parameter_size();
               // this works but needs a resourcemark and seems to create a vtable on every call:
               // Method* callee = rcvr->klass()->vtable()->method_at(cache->f2_as_index());
               //
               // this fails with an assert
               // InstanceKlass* rcvrKlass = InstanceKlass::cast(STACK_OBJECT(-parms)->klass());
               // but this works
               oop rcvr = STACK_OBJECT(-parms);
               VERIFY_OOP(rcvr);
               InstanceKlass* rcvrKlass = (InstanceKlass*)rcvr->klass();
               /*
                 Executing this code in java.lang.String:
                     public String(char value[]) {
                           this.count = value.length;
                           this.value = (char[])value.clone();
                      }
                  a find on rcvr->klass() reports:
                  {type array char}{type array class}
                   - klass: {other class}
                   but using InstanceKlass::cast(STACK_OBJECT(-parms)->klass()) causes in assertion failure
                   because rcvr->klass()->oop_is_instance() == 0
                   However it seems to have a vtable in the right location. Huh?
               */
               callee = (Method*) rcvrKlass->start_of_vtable()[ cache->f2_as_index()];
               // Profile virtual call.
               BI_PROFILE_UPDATE_VIRTUALCALL(rcvr->klass());
             }
           } else {
             if ((Bytecodes::Code)opcode == Bytecodes::_invokespecial) {
               CHECK_NULL(STACK_OBJECT(-(cache->parameter_size())));
             }
             callee = cache->f1_as_method();
             // Profile call.
             BI_PROFILE_UPDATE_CALL();
           }
           istate->set_callee(callee);
           istate->set_callee_entry_point(callee->from_interpreted_entry());
 #ifdef VM_JVMTI
           if (JvmtiExport::can_post_interpreter_events() && THREAD->is_interp_only_mode()) {
             istate->set_callee_entry_point(callee->interpreter_entry());
           }
 #endif /* VM_JVMTI */
           istate->set_bcp_advance(3);
           UPDATE_PC_AND_RETURN(0); // I'll be back...
         }
       }
       /* Allocate memory for a new java object. */
       CASE(_newarray): {
         BasicType atype = (BasicType) *(pc+1);
         jint size = STACK_INT(-1);
         CALL_VM(InterpreterRuntime::newarray(THREAD, atype, size),
                 handle_exception);
         SET_STACK_OBJECT(THREAD->vm_result(), -1);
         THREAD->set_vm_result(NULL);
         UPDATE_PC_AND_CONTINUE(2);
       }
       /* Throw an exception. */
       CASE(_athrow): {
           oop except_oop = STACK_OBJECT(-1);
           CHECK_NULL(except_oop);
           // set pending_exception so we use common code
           THREAD->set_pending_exception(except_oop, NULL, 0);
           goto handle_exception;
       }
       /* goto and jsr. They are exactly the same except jsr pushes
        * the address of the next instruction first.
        */
       CASE(_jsr): {
           /* push bytecode index on stack */
           SET_STACK_ADDR(((address)pc - (intptr_t)(istate->method()->code_base()) + 3), 0);
           MORE_STACK(1);
           /* FALL THROUGH */
       }
       CASE(_goto):
       {
           int16_t offset = (int16_t)Bytes::get_Java_u2(pc + 1);
           // Profile jump.
           BI_PROFILE_UPDATE_JUMP();
           address branch_pc = pc;
           UPDATE_PC(offset);
           DO_BACKEDGE_CHECKS(offset, branch_pc);
           CONTINUE;
       }
       CASE(_jsr_w): {
           /* push return address on the stack */
           SET_STACK_ADDR(((address)pc - (intptr_t)(istate->method()->code_base()) + 5), 0);
           MORE_STACK(1);
           /* FALL THROUGH */
       }
       CASE(_goto_w):
       {
           int32_t offset = Bytes::get_Java_u4(pc + 1);
           // Profile jump.
           BI_PROFILE_UPDATE_JUMP();
           address branch_pc = pc;
           UPDATE_PC(offset);
           DO_BACKEDGE_CHECKS(offset, branch_pc);
           CONTINUE;
       }
       /* return from a jsr or jsr_w */
       CASE(_ret): {
           // Profile ret.
           BI_PROFILE_UPDATE_RET(/*bci=*/((int)(intptr_t)(LOCALS_ADDR(pc[1]))));
           // Now, update the pc.
           pc = istate->method()->code_base() + (intptr_t)(LOCALS_ADDR(pc[1]));
           UPDATE_PC_AND_CONTINUE(0);
       }
       /* debugger breakpoint */
       CASE(_breakpoint): {
           Bytecodes::Code original_bytecode;
           DECACHE_STATE();
           SET_LAST_JAVA_FRAME();
           original_bytecode = InterpreterRuntime::get_original_bytecode_at(THREAD,
                               METHOD, pc);
           RESET_LAST_JAVA_FRAME();
           CACHE_STATE();
           if (THREAD->has_pending_exception()) goto handle_exception;
             CALL_VM(InterpreterRuntime::_breakpoint(THREAD, METHOD, pc),
                                                     handle_exception);
           opcode = (jubyte)original_bytecode;
           goto opcode_switch;
       }
       DEFAULT:
           fatal(err_msg("Unimplemented opcode %d = %s", opcode,
                         Bytecodes::name((Bytecodes::Code)opcode)));
           goto finish;
       } /* switch(opc) */
 #ifdef USELABELS
     check_for_exception:
 #endif
     {
       if (!THREAD->has_pending_exception()) {
         CONTINUE;
       }
       /* We will be gcsafe soon, so flush our state. */
       DECACHE_PC();
       goto handle_exception;
     }
   do_continue: ;
   } /* while (1) interpreter loop */
   // An exception exists in the thread state see whether this activation can handle it
   handle_exception: {
     HandleMarkCleaner __hmc(THREAD);
     Handle except_oop(THREAD, THREAD->pending_exception());
     // Prevent any subsequent HandleMarkCleaner in the VM
     // from freeing the except_oop handle.
     HandleMark __hm(THREAD);
     THREAD->clear_pending_exception();
     assert(except_oop(), "No exception to process");
     intptr_t continuation_bci;
     // expression stack is emptied
     topOfStack = istate->stack_base() - Interpreter::stackElementWords;
     CALL_VM(continuation_bci = (intptr_t)InterpreterRuntime::exception_handler_for_exception(THREAD, except_oop()),
             handle_exception);
     except_oop = THREAD->vm_result();
     THREAD->set_vm_result(NULL);
     if (continuation_bci >= 0) {
       // Place exception on top of stack
       SET_STACK_OBJECT(except_oop(), 0);
       MORE_STACK(1);
       pc = METHOD->code_base() + continuation_bci;
       if (TraceExceptions) {
         ttyLocker ttyl;
         ResourceMark rm;
         tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", except_oop->print_value_string(), (void*)except_oop());
         tty->print_cr(" thrown in interpreter method <%s>", METHOD->print_value_string());
         tty->print_cr(" at bci %d, continuing at %d for thread " INTPTR_FORMAT,
                       istate->bcp() - (intptr_t)METHOD->code_base(),
                       continuation_bci, THREAD);
       }
       // for AbortVMOnException flag
       NOT_PRODUCT(Exceptions::debug_check_abort(except_oop));
       // Update profiling data.
       BI_PROFILE_ALIGN_TO_CURRENT_BCI();
       goto run;
     }
     if (TraceExceptions) {
       ttyLocker ttyl;
       ResourceMark rm;
       tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", except_oop->print_value_string(), (void*)except_oop());
       tty->print_cr(" thrown in interpreter method <%s>", METHOD->print_value_string());
       tty->print_cr(" at bci %d, unwinding for thread " INTPTR_FORMAT,
                     istate->bcp() - (intptr_t)METHOD->code_base(),
                     THREAD);
     }
     // for AbortVMOnException flag
     NOT_PRODUCT(Exceptions::debug_check_abort(except_oop));
     // No handler in this activation, unwind and try again
     THREAD->set_pending_exception(except_oop(), NULL, 0);
     goto handle_return;
   }  // handle_exception:
   // Return from an interpreter invocation with the result of the interpretation
   // on the top of the Java Stack (or a pending exception)
   handle_Pop_Frame: {
     // We don't really do anything special here except we must be aware
     // that we can get here without ever locking the method (if sync).
     // Also we skip the notification of the exit.
     istate->set_msg(popping_frame);
     // Clear pending so while the pop is in process
     // we don't start another one if a call_vm is done.
     THREAD->clr_pop_frame_pending();
     // Let interpreter (only) see the we're in the process of popping a frame
     THREAD->set_pop_frame_in_process();
     goto handle_return;
   } // handle_Pop_Frame
   // ForceEarlyReturn ends a method, and returns to the caller with a return value
   // given by the invoker of the early return.
   handle_Early_Return: {
     istate->set_msg(early_return);
     // Clear expression stack.
     topOfStack = istate->stack_base() - Interpreter::stackElementWords;
     JvmtiThreadState *ts = THREAD->jvmti_thread_state();
     // Push the value to be returned.
     switch (istate->method()->result_type()) {
       case T_BOOLEAN:
       case T_SHORT:
       case T_BYTE:
       case T_CHAR:
       case T_INT:
         SET_STACK_INT(ts->earlyret_value().i, 0);
         MORE_STACK(1);
         break;
       case T_LONG:
         SET_STACK_LONG(ts->earlyret_value().j, 1);
         MORE_STACK(2);
         break;
       case T_FLOAT:
         SET_STACK_FLOAT(ts->earlyret_value().f, 0);
         MORE_STACK(1);
         break;
       case T_DOUBLE:
         SET_STACK_DOUBLE(ts->earlyret_value().d, 1);
         MORE_STACK(2);
         break;
       case T_ARRAY:
       case T_OBJECT:
         SET_STACK_OBJECT(ts->earlyret_oop(), 0);
         MORE_STACK(1);
         break;
     }
     ts->clr_earlyret_value();
     ts->set_earlyret_oop(NULL);
     ts->clr_earlyret_pending();
     // Fall through to handle_return.
   } // handle_Early_Return
   handle_return: {
     DECACHE_STATE();
     bool suppress_error = istate->msg() == popping_frame || istate->msg() == early_return;
     bool suppress_exit_event = THREAD->has_pending_exception() || istate->msg() == popping_frame;
     Handle original_exception(THREAD, THREAD->pending_exception());
     Handle illegal_state_oop(THREAD, NULL);
     // We'd like a HandleMark here to prevent any subsequent HandleMarkCleaner
     // in any following VM entries from freeing our live handles, but illegal_state_oop
     // isn't really allocated yet and so doesn't become live until later and
     // in unpredicatable places. Instead we must protect the places where we enter the
     // VM. It would be much simpler (and safer) if we could allocate a real handle with
     // a NULL oop in it and then overwrite the oop later as needed. This isn't
     // unfortunately isn't possible.
     THREAD->clear_pending_exception();
     //
     // As far as we are concerned we have returned. If we have a pending exception
     // that will be returned as this invocation's result. However if we get any
     // exception(s) while checking monitor state one of those IllegalMonitorStateExceptions
     // will be our final result (i.e. monitor exception trumps a pending exception).
     //
     // If we never locked the method (or really passed the point where we would have),
     // there is no need to unlock it (or look for other monitors), since that
     // could not have happened.
     if (THREAD->do_not_unlock()) {
       // Never locked, reset the flag now because obviously any caller must
       // have passed their point of locking for us to have gotten here.
       THREAD->clr_do_not_unlock();
     } else {
       // At this point we consider that we have returned. We now check that the
       // locks were properly block structured. If we find that they were not
       // used properly we will return with an illegal monitor exception.
       // The exception is checked by the caller not the callee since this
       // checking is considered to be part of the invocation and therefore
       // in the callers scope (JVM spec 8.13).
       //
       // Another weird thing to watch for is if the method was locked
       // recursively and then not exited properly. This means we must
       // examine all the entries in reverse time(and stack) order and
       // unlock as we find them. If we find the method monitor before
       // we are at the initial entry then we should throw an exception.
       // It is not clear the template based interpreter does this
       // correctly
       BasicObjectLock* base = istate->monitor_base();
       BasicObjectLock* end = (BasicObjectLock*) istate->stack_base();
       bool method_unlock_needed = METHOD->is_synchronized();
       // We know the initial monitor was used for the method don't check that
       // slot in the loop
       if (method_unlock_needed) base--;
       // Check all the monitors to see they are unlocked. Install exception if found to be locked.
       while (end < base) {
         oop lockee = end->obj();
         if (lockee != NULL) {
           BasicLock* lock = end->lock();
           markOop header = lock->displaced_header();
           end->set_obj(NULL);
           if (!lockee->mark()->has_bias_pattern()) {
             // If it isn't recursive we either must swap old header or call the runtime
             if (header != NULL) {
               if (Atomic::cmpxchg_ptr(header, lockee->mark_addr(), lock) != lock) {
                 // restore object for the slow case
                 end->set_obj(lockee);
                 {
                   // Prevent any HandleMarkCleaner from freeing our live handles
                   HandleMark __hm(THREAD);
                   CALL_VM_NOCHECK(InterpreterRuntime::monitorexit(THREAD, end));
                 }
               }
             }
           }
           // One error is plenty
           if (illegal_state_oop() == NULL && !suppress_error) {
             {
               // Prevent any HandleMarkCleaner from freeing our live handles
               HandleMark __hm(THREAD);
               CALL_VM_NOCHECK(InterpreterRuntime::throw_illegal_monitor_state_exception(THREAD));
             }
             assert(THREAD->has_pending_exception(), "Lost our exception!");
             illegal_state_oop = THREAD->pending_exception();
             THREAD->clear_pending_exception();
           }
         }
         end++;
       }
       // Unlock the method if needed
       if (method_unlock_needed) {
         if (base->obj() == NULL) {
           // The method is already unlocked this is not good.
           if (illegal_state_oop() == NULL && !suppress_error) {
             {
               // Prevent any HandleMarkCleaner from freeing our live handles
               HandleMark __hm(THREAD);
               CALL_VM_NOCHECK(InterpreterRuntime::throw_illegal_monitor_state_exception(THREAD));
             }
             assert(THREAD->has_pending_exception(), "Lost our exception!");
             illegal_state_oop = THREAD->pending_exception();
             THREAD->clear_pending_exception();
           }
         } else {
           //
           // The initial monitor is always used for the method
           // However if that slot is no longer the oop for the method it was unlocked
           // and reused by something that wasn't unlocked!
           //
           // deopt can come in with rcvr dead because c2 knows
           // its value is preserved in the monitor. So we can't use locals[0] at all
           // and must use first monitor slot.
           //
           oop rcvr = base->obj();
           if (rcvr == NULL) {
             if (!suppress_error) {
               VM_JAVA_ERROR_NO_JUMP(vmSymbols::java_lang_NullPointerException(), "", note_nullCheck_trap);
               illegal_state_oop = THREAD->pending_exception();
               THREAD->clear_pending_exception();
             }
           } else if (UseHeavyMonitors) {
             {
               // Prevent any HandleMarkCleaner from freeing our live handles.
               HandleMark __hm(THREAD);
               CALL_VM_NOCHECK(InterpreterRuntime::monitorexit(THREAD, base));
             }
             if (THREAD->has_pending_exception()) {
               if (!suppress_error) illegal_state_oop = THREAD->pending_exception();
               THREAD->clear_pending_exception();
             }
           } else {
             BasicLock* lock = base->lock();
             markOop header = lock->displaced_header();
             base->set_obj(NULL);
             if (!rcvr->mark()->has_bias_pattern()) {
               base->set_obj(NULL);
               // If it isn't recursive we either must swap old header or call the runtime
               if (header != NULL) {
                 if (Atomic::cmpxchg_ptr(header, rcvr->mark_addr(), lock) != lock) {
                   // restore object for the slow case
                   base->set_obj(rcvr);
                   {
                     // Prevent any HandleMarkCleaner from freeing our live handles
                     HandleMark __hm(THREAD);
                     CALL_VM_NOCHECK(InterpreterRuntime::monitorexit(THREAD, base));
                   }
                   if (THREAD->has_pending_exception()) {
                     if (!suppress_error) illegal_state_oop = THREAD->pending_exception();
                     THREAD->clear_pending_exception();
                   }
                 }
               }
             }
           }
         }
       }
     }
     // Clear the do_not_unlock flag now.
     THREAD->clr_do_not_unlock();
     //
     // Notify jvmti/jvmdi
     //
     // NOTE: we do not notify a method_exit if we have a pending exception,
     // including an exception we generate for unlocking checks.  In the former
     // case, JVMDI has already been notified by our call for the exception handler
     // and in both cases as far as JVMDI is concerned we have already returned.
     // If we notify it again JVMDI will be all confused about how many frames
     // are still on the stack (4340444).
     //
     // NOTE Further! It turns out the the JVMTI spec in fact expects to see
     // method_exit events whenever we leave an activation unless it was done
     // for popframe. This is nothing like jvmdi. However we are passing the
     // tests at the moment (apparently because they are jvmdi based) so rather
     // than change this code and possibly fail tests we will leave it alone
     // (with this note) in anticipation of changing the vm and the tests
     // simultaneously.
     //
     suppress_exit_event = suppress_exit_event || illegal_state_oop() != NULL;
 #ifdef VM_JVMTI
       if (_jvmti_interp_events) {
         // Whenever JVMTI puts a thread in interp_only_mode, method
         // entry/exit events are sent for that thread to track stack depth.
         if ( !suppress_exit_event && THREAD->is_interp_only_mode() ) {
           {
             // Prevent any HandleMarkCleaner from freeing our live handles
             HandleMark __hm(THREAD);
             CALL_VM_NOCHECK(InterpreterRuntime::post_method_exit(THREAD));
           }
         }
       }
 #endif /* VM_JVMTI */
     //
     // See if we are returning any exception
     // A pending exception that was pending prior to a possible popping frame
     // overrides the popping frame.
     //
     assert(!suppress_error || (suppress_error && illegal_state_oop() == NULL), "Error was not suppressed");
     if (illegal_state_oop() != NULL || original_exception() != NULL) {
       // Inform the frame manager we have no result.
       istate->set_msg(throwing_exception);
       if (illegal_state_oop() != NULL)
         THREAD->set_pending_exception(illegal_state_oop(), NULL, 0);
       else
         THREAD->set_pending_exception(original_exception(), NULL, 0);
       UPDATE_PC_AND_RETURN(0);
     }
     if (istate->msg() == popping_frame) {
       // Make it simpler on the assembly code and set the message for the frame pop.
       // returns
       if (istate->prev() == NULL) {
         // We must be returning to a deoptimized frame (because popframe only happens between
         // two interpreted frames). We need to save the current arguments in C heap so that
         // the deoptimized frame when it restarts can copy the arguments to its expression
         // stack and re-execute the call. We also have to notify deoptimization that this
         // has occurred and to pick the preserved args copy them to the deoptimized frame's
         // java expression stack. Yuck.
         //
         THREAD->popframe_preserve_args(in_ByteSize(METHOD->size_of_parameters() * wordSize),
                                 LOCALS_SLOT(METHOD->size_of_parameters() - 1));
         THREAD->set_popframe_condition_bit(JavaThread::popframe_force_deopt_reexecution_bit);
       }
     } else {
       istate->set_msg(return_from_method);
     }
     // Normal return
     // Advance the pc and return to frame manager
     UPDATE_PC_AND_RETURN(1);
   } /* handle_return: */
 // This is really a fatal error return
 finish:
   DECACHE_TOS();
   DECACHE_PC();
   return;
 }
 /*
  * All the code following this point is only produced once and is not present
  * in the JVMTI version of the interpreter
 */
 #ifndef VM_JVMTI
 // This constructor should only be used to contruct the object to signal
 // interpreter initialization. All other instances should be created by
 // the frame manager.
 BytecodeInterpreter::BytecodeInterpreter(messages msg) {
   if (msg != initialize) ShouldNotReachHere();
   _msg = msg;
   _self_link = this;
   _prev_link = NULL;
 }
 // Inline static functions for Java Stack and Local manipulation
 // The implementations are platform dependent. We have to worry about alignment
 // issues on some machines which can change on the same platform depending on
 // whether it is an LP64 machine also.
 address BytecodeInterpreter::stack_slot(intptr_t *tos, int offset) {
   return (address) tos[Interpreter::expr_index_at(-offset)];
 }
 jint BytecodeInterpreter::stack_int(intptr_t *tos, int offset) {
   return *((jint*) &tos[Interpreter::expr_index_at(-offset)]);
 }
 jfloat BytecodeInterpreter::stack_float(intptr_t *tos, int offset) {
   return *((jfloat *) &tos[Interpreter::expr_index_at(-offset)]);
 }
 oop BytecodeInterpreter::stack_object(intptr_t *tos, int offset) {
   return cast_to_oop(tos [Interpreter::expr_index_at(-offset)]);
 }
 jdouble BytecodeInterpreter::stack_double(intptr_t *tos, int offset) {
   return ((VMJavaVal64*) &tos[Interpreter::expr_index_at(-offset)])->d;
 }
 jlong BytecodeInterpreter::stack_long(intptr_t *tos, int offset) {
   return ((VMJavaVal64 *) &tos[Interpreter::expr_index_at(-offset)])->l;
 }
 // only used for value types
 void BytecodeInterpreter::set_stack_slot(intptr_t *tos, address value,
                                                         int offset) {
   *((address *)&tos[Interpreter::expr_index_at(-offset)]) = value;
 }
 void BytecodeInterpreter::set_stack_int(intptr_t *tos, int value,
                                                        int offset) {
   *((jint *)&tos[Interpreter::expr_index_at(-offset)]) = value;
 }
 void BytecodeInterpreter::set_stack_float(intptr_t *tos, jfloat value,
                                                          int offset) {
   *((jfloat *)&tos[Interpreter::expr_index_at(-offset)]) = value;
 }
 void BytecodeInterpreter::set_stack_object(intptr_t *tos, oop value,
                                                           int offset) {
   *((oop *)&tos[Interpreter::expr_index_at(-offset)]) = value;
 }
 // needs to be platform dep for the 32 bit platforms.
 void BytecodeInterpreter::set_stack_double(intptr_t *tos, jdouble value,
                                                           int offset) {
   ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->d = value;
 }
 void BytecodeInterpreter::set_stack_double_from_addr(intptr_t *tos,
                                               address addr, int offset) {
   (((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->d =
                         ((VMJavaVal64*)addr)->d);
 }
 void BytecodeInterpreter::set_stack_long(intptr_t *tos, jlong value,
                                                         int offset) {
   ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset+1)])->l = 0xdeedbeeb;
   ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->l = value;
 }
 void BytecodeInterpreter::set_stack_long_from_addr(intptr_t *tos,
                                             address addr, int offset) {
   ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset+1)])->l = 0xdeedbeeb;
   ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->l =
                         ((VMJavaVal64*)addr)->l;
 }
 // Locals
 address BytecodeInterpreter::locals_slot(intptr_t* locals, int offset) {
   return (address)locals[Interpreter::local_index_at(-offset)];
 }
 jint BytecodeInterpreter::locals_int(intptr_t* locals, int offset) {
   return (jint)locals[Interpreter::local_index_at(-offset)];
 }
 jfloat BytecodeInterpreter::locals_float(intptr_t* locals, int offset) {
   return (jfloat)locals[Interpreter::local_index_at(-offset)];
 }
 oop BytecodeInterpreter::locals_object(intptr_t* locals, int offset) {
   return cast_to_oop(locals[Interpreter::local_index_at(-offset)]);
 }
 jdouble BytecodeInterpreter::locals_double(intptr_t* locals, int offset) {
   return ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->d;
 }
 jlong BytecodeInterpreter::locals_long(intptr_t* locals, int offset) {
   return ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->l;
 }
 // Returns the address of locals value.
 address BytecodeInterpreter::locals_long_at(intptr_t* locals, int offset) {
   return ((address)&locals[Interpreter::local_index_at(-(offset+1))]);
 }
 address BytecodeInterpreter::locals_double_at(intptr_t* locals, int offset) {
   return ((address)&locals[Interpreter::local_index_at(-(offset+1))]);
 }
 // Used for local value or returnAddress
 void BytecodeInterpreter::set_locals_slot(intptr_t *locals,
                                    address value, int offset) {
   *((address*)&locals[Interpreter::local_index_at(-offset)]) = value;
 }
 void BytecodeInterpreter::set_locals_int(intptr_t *locals,
                                    jint value, int offset) {
   *((jint *)&locals[Interpreter::local_index_at(-offset)]) = value;
 }
 void BytecodeInterpreter::set_locals_float(intptr_t *locals,
                                    jfloat value, int offset) {
   *((jfloat *)&locals[Interpreter::local_index_at(-offset)]) = value;
 }
 void BytecodeInterpreter::set_locals_object(intptr_t *locals,
                                    oop value, int offset) {
   *((oop *)&locals[Interpreter::local_index_at(-offset)]) = value;
 }
 void BytecodeInterpreter::set_locals_double(intptr_t *locals,
                                    jdouble value, int offset) {
   ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->d = value;
 }
 void BytecodeInterpreter::set_locals_long(intptr_t *locals,
                                    jlong value, int offset) {
   ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->l = value;
 }
 void BytecodeInterpreter::set_locals_double_from_addr(intptr_t *locals,
                                    address addr, int offset) {
   ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->d = ((VMJavaVal64*)addr)->d;
 }
 void BytecodeInterpreter::set_locals_long_from_addr(intptr_t *locals,
                                    address addr, int offset) {
   ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->l = ((VMJavaVal64*)addr)->l;
 }
 void BytecodeInterpreter::astore(intptr_t* tos,    int stack_offset,
                           intptr_t* locals, int locals_offset) {
   intptr_t value = tos[Interpreter::expr_index_at(-stack_offset)];
   locals[Interpreter::local_index_at(-locals_offset)] = value;
 }
 void BytecodeInterpreter::copy_stack_slot(intptr_t *tos, int from_offset,
                                    int to_offset) {
   tos[Interpreter::expr_index_at(-to_offset)] =
                       (intptr_t)tos[Interpreter::expr_index_at(-from_offset)];
 }
 void BytecodeInterpreter::dup(intptr_t *tos) {
   copy_stack_slot(tos, -1, 0);
 }
 void BytecodeInterpreter::dup2(intptr_t *tos) {
   copy_stack_slot(tos, -2, 0);
   copy_stack_slot(tos, -1, 1);
 }
 void BytecodeInterpreter::dup_x1(intptr_t *tos) {
   /* insert top word two down */
   copy_stack_slot(tos, -1, 0);
   copy_stack_slot(tos, -2, -1);
   copy_stack_slot(tos, 0, -2);
 }
 void BytecodeInterpreter::dup_x2(intptr_t *tos) {
   /* insert top word three down  */
   copy_stack_slot(tos, -1, 0);
   copy_stack_slot(tos, -2, -1);
   copy_stack_slot(tos, -3, -2);
   copy_stack_slot(tos, 0, -3);
 }
 void BytecodeInterpreter::dup2_x1(intptr_t *tos) {
   /* insert top 2 slots three down */
   copy_stack_slot(tos, -1, 1);
   copy_stack_slot(tos, -2, 0);
   copy_stack_slot(tos, -3, -1);
   copy_stack_slot(tos, 1, -2);
   copy_stack_slot(tos, 0, -3);
 }
 void BytecodeInterpreter::dup2_x2(intptr_t *tos) {
   /* insert top 2 slots four down */
   copy_stack_slot(tos, -1, 1);
   copy_stack_slot(tos, -2, 0);
   copy_stack_slot(tos, -3, -1);
   copy_stack_slot(tos, -4, -2);
   copy_stack_slot(tos, 1, -3);
   copy_stack_slot(tos, 0, -4);
 }
 void BytecodeInterpreter::swap(intptr_t *tos) {
   // swap top two elements
   intptr_t val = tos[Interpreter::expr_index_at(1)];
   // Copy -2 entry to -1
   copy_stack_slot(tos, -2, -1);
   // Store saved -1 entry into -2
   tos[Interpreter::expr_index_at(2)] = val;
 }
 // --------------------------------------------------------------------------------
 // Non-product code
 #ifndef PRODUCT
 const char* BytecodeInterpreter::C_msg(BytecodeInterpreter::messages msg) {
   switch (msg) {
      case BytecodeInterpreter::no_request:  return("no_request");
      case BytecodeInterpreter::initialize:  return("initialize");
      // status message to C++ interpreter
      case BytecodeInterpreter::method_entry:  return("method_entry");
      case BytecodeInterpreter::method_resume:  return("method_resume");
      case BytecodeInterpreter::got_monitors:  return("got_monitors");
      case BytecodeInterpreter::rethrow_exception:  return("rethrow_exception");
      // requests to frame manager from C++ interpreter
      case BytecodeInterpreter::call_method:  return("call_method");
      case BytecodeInterpreter::return_from_method:  return("return_from_method");
      case BytecodeInterpreter::more_monitors:  return("more_monitors");
      case BytecodeInterpreter::throwing_exception:  return("throwing_exception");
      case BytecodeInterpreter::popping_frame:  return("popping_frame");
      case BytecodeInterpreter::do_osr:  return("do_osr");
      // deopt
      case BytecodeInterpreter::deopt_resume:  return("deopt_resume");
      case BytecodeInterpreter::deopt_resume2:  return("deopt_resume2");
      default: return("BAD MSG");
   }
 }
 void
 BytecodeInterpreter::print() {
   tty->print_cr("thread: " INTPTR_FORMAT, (uintptr_t) this->_thread);
   tty->print_cr("bcp: " INTPTR_FORMAT, (uintptr_t) this->_bcp);
   tty->print_cr("locals: " INTPTR_FORMAT, (uintptr_t) this->_locals);
   tty->print_cr("constants: " INTPTR_FORMAT, (uintptr_t) this->_constants);
   {
     ResourceMark rm;
     char *method_name = _method->name_and_sig_as_C_string();
     tty->print_cr("method: " INTPTR_FORMAT "[ %s ]",  (uintptr_t) this->_method, method_name);
   }
   tty->print_cr("mdx: " INTPTR_FORMAT, (uintptr_t) this->_mdx);
   tty->print_cr("stack: " INTPTR_FORMAT, (uintptr_t) this->_stack);
   tty->print_cr("msg: %s", C_msg(this->_msg));
   tty->print_cr("result_to_call._callee: " INTPTR_FORMAT, (uintptr_t) this->_result._to_call._callee);
   tty->print_cr("result_to_call._callee_entry_point: " INTPTR_FORMAT, (uintptr_t) this->_result._to_call._callee_entry_point);
   tty->print_cr("result_to_call._bcp_advance: %d ", this->_result._to_call._bcp_advance);
   tty->print_cr("osr._osr_buf: " INTPTR_FORMAT, (uintptr_t) this->_result._osr._osr_buf);
   tty->print_cr("osr._osr_entry: " INTPTR_FORMAT, (uintptr_t) this->_result._osr._osr_entry);
   tty->print_cr("prev_link: " INTPTR_FORMAT, (uintptr_t) this->_prev_link);
   tty->print_cr("native_mirror: " INTPTR_FORMAT, (void*) this->_oop_temp);
   tty->print_cr("stack_base: " INTPTR_FORMAT, (uintptr_t) this->_stack_base);
   tty->print_cr("stack_limit: " INTPTR_FORMAT, (uintptr_t) this->_stack_limit);
   tty->print_cr("monitor_base: " INTPTR_FORMAT, (uintptr_t) this->_monitor_base);
 #ifdef SPARC
   tty->print_cr("last_Java_pc: " INTPTR_FORMAT, (uintptr_t) this->_last_Java_pc);
   tty->print_cr("frame_bottom: " INTPTR_FORMAT, (uintptr_t) this->_frame_bottom);
   tty->print_cr("&native_fresult: " INTPTR_FORMAT, (uintptr_t) &this->_native_fresult);
   tty->print_cr("native_lresult: " INTPTR_FORMAT, (uintptr_t) this->_native_lresult);
 #endif
 #if !defined(ZERO)
   tty->print_cr("last_Java_fp: " INTPTR_FORMAT, (uintptr_t) this->_last_Java_fp);
 #endif // !ZERO
   tty->print_cr("self_link: " INTPTR_FORMAT, (uintptr_t) this->_self_link);
 }
 extern "C" {
   void PI(uintptr_t arg) {
     ((BytecodeInterpreter*)arg)->print();
   }
 }
 #endif // PRODUCT
 #endif // JVMTI
 #endif // CC_INTERP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/interpreter/bytecodeInterpreter.cpp@018b357638aa (annotated)

src/share/vm/interpreter/bytecodeInterpreter.cpp