4926272: methodOopDesc::method_from_bcp is unsafe
Reviewed-by: coleenp, jrose, kvn, dcubed
/*
* Copyright (c) 2002, 2011, 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/interpreter.hpp"
#include "interpreter/interpreterRuntime.hpp"
#include "memory/cardTableModRefBS.hpp"
#include "memory/resourceArea.hpp"
#include "oops/objArrayKlass.hpp"
#include "oops/oop.inline.hpp"
#include "prims/jvmtiExport.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
// 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) \
DECACHE_STATE(); \
SET_LAST_JAVA_FRAME(); \
{ \
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) \
VM_JAVA_ERROR_NO_JUMP(name, msg) \
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; \
} \
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
// JavaStack Implementation
#define MORE_STACK(count) \
(topOfStack -= ((count) * Interpreter::stackElementWords))
#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 INVOCATION_COUNT METHOD->invocation_counter()
#define BACKEDGE_COUNT METHOD->backedge_counter()
#define INCR_INVOCATION_COUNT INVOCATION_COUNT->increment()
#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) { \
if (UseLoopCounter) { \
bool do_OSR = UseOnStackReplacement; \
BACKEDGE_COUNT->increment(); \
if (do_OSR) do_OSR = BACKEDGE_COUNT->reached_InvocationLimit(); \
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 = 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 ... */ \
INCR_INVOCATION_COUNT; \
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()
/*
* 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(), ""); \
} \
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 don't check for pending exceptions
#define CALL_VM_NOCHECK(func) \
DECACHE_STATE(); \
SET_LAST_JAVA_FRAME(); \
func; \
RESET_LAST_JAVA_FRAME(); \
CACHE_STATE(); \
if (THREAD->pop_frame_pending() && \
!THREAD->pop_frame_in_process()) { \
goto handle_Pop_Frame; \
}
// 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) {
assert(abs(istate->_stack_base - istate->_stack_limit) == (istate->_method->max_stack() + 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
static volatile jbyte* _byte_map_base; // adjusted card table base for oop store barrier
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 constantPoolCacheOop cp = istate->constants(); // method()->constants()->cache()
#ifdef LOTS_OF_REGS
register JavaThread* THREAD = istate->thread();
register volatile jbyte* BYTE_MAP_BASE = _byte_map_base;
#else
#undef THREAD
#define THREAD istate->thread()
#undef BYTE_MAP_BASE
#define BYTE_MAP_BASE _byte_map_base
#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_default, &&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_return_register_finalizer, &&opc_default, &&opc_default,
/* 0xE8 */ &&opc_default, &&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");
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
BarrierSet* bs = Universe::heap()->barrier_set();
assert(bs->kind() == BarrierSet::CardTableModRef, "Wrong barrier set kind");
_byte_map_base = (volatile jbyte*)(((CardTableModRefBS*)bs)->byte_map_base);
return;
}
break;
case method_entry: {
THREAD->set_do_not_unlock();
// count invocations
assert(initialized, "Interpreter not initialized");
if (_compiling) {
if (ProfileInterpreter) {
METHOD->increment_interpreter_invocation_count();
}
INCR_INVOCATION_COUNT;
if (INVOCATION_COUNT->reached_InvocationLimit()) {
CALL_VM((void)InterpreterRuntime::frequency_counter_overflow(THREAD, NULL), handle_exception);
// We no longer retry on a counter overflow
// istate->set_msg(retry_method);
// THREAD->clr_do_not_unlock();
// return;
}
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()->klass_part()->java_mirror();
} else {
rcvr = LOCALS_OBJECT(0);
VERIFY_OOP(rcvr);
}
// The initial monitor is ours for the taking
BasicObjectLock* mon = &istate->monitor_base()[-1];
oop monobj = mon->obj();
assert(mon->obj() == rcvr, "method monitor mis-initialized");
bool success = UseBiasedLocking;
if (UseBiasedLocking) {
markOop mark = rcvr->mark();
if (mark->has_bias_pattern()) {
// The bias pattern is present in the object's header. Need to check
// whether the bias owner and the epoch are both still current.
intptr_t xx = ((intptr_t) THREAD) ^ (intptr_t) mark;
xx = (intptr_t) rcvr->klass()->klass_part()->prototype_header() ^ xx;
intptr_t yy = (xx & ~((int) markOopDesc::age_mask_in_place));
if (yy != 0 ) {
// At this point we know that the header has the bias pattern and
// that we are not the bias owner in the current epoch. We need to
// figure out more details about the state of the header in order to
// know what operations can be legally performed on the object's
// header.
// If the low three bits in the xor result aren't clear, that means
// the prototype header is no longer biased and we have to revoke
// the bias on this object.
if (yy & markOopDesc::biased_lock_mask_in_place == 0 ) {
// Biasing is still enabled for this data type. See whether the
// epoch of the current bias is still valid, meaning that the epoch
// bits of the mark word are equal to the epoch bits of the
// prototype header. (Note that the prototype header's epoch bits
// only change at a safepoint.) If not, attempt to rebias the object
// toward the current thread. Note that we must be absolutely sure
// that the current epoch is invalid in order to do this because
// otherwise the manipulations it performs on the mark word are
// illegal.
if (yy & markOopDesc::epoch_mask_in_place == 0) {
// The epoch of the current bias is still valid but we know nothing
// about the owner; it might be set or it might be clear. Try to
// acquire the bias of the object using an atomic operation. If this
// fails we will go in to the runtime to revoke the object's bias.
// Note that we first construct the presumed unbiased header so we
// don't accidentally blow away another thread's valid bias.
intptr_t unbiased = (intptr_t) mark & (markOopDesc::biased_lock_mask_in_place |
markOopDesc::age_mask_in_place |
markOopDesc::epoch_mask_in_place);
if (Atomic::cmpxchg_ptr((intptr_t)THREAD | unbiased, (intptr_t*) rcvr->mark_addr(), unbiased) != unbiased) {
CALL_VM(InterpreterRuntime::monitorenter(THREAD, mon), handle_exception);
}
} else {
try_rebias:
// At this point we know the epoch has expired, meaning that the
// current "bias owner", if any, is actually invalid. Under these
// circumstances _only_, we are allowed to use the current header's
// value as the comparison value when doing the cas to acquire the
// bias in the current epoch. In other words, we allow transfer of
// the bias from one thread to another directly in this situation.
xx = (intptr_t) rcvr->klass()->klass_part()->prototype_header() | (intptr_t) THREAD;
if (Atomic::cmpxchg_ptr((intptr_t)THREAD | (intptr_t) rcvr->klass()->klass_part()->prototype_header(),
(intptr_t*) rcvr->mark_addr(),
(intptr_t) mark) != (intptr_t) mark) {
CALL_VM(InterpreterRuntime::monitorenter(THREAD, mon), handle_exception);
}
}
} else {
try_revoke_bias:
// The prototype mark in the klass doesn't have the bias bit set any
// more, indicating that objects of this data type are not supposed
// to be biased any more. We are going to try to reset the mark of
// this object to the prototype value and fall through to the
// CAS-based locking scheme. Note that if our CAS fails, it means
// that another thread raced us for the privilege of revoking the
// bias of this particular object, so it's okay to continue in the
// normal locking code.
//
xx = (intptr_t) rcvr->klass()->klass_part()->prototype_header() | (intptr_t) THREAD;
if (Atomic::cmpxchg_ptr(rcvr->klass()->klass_part()->prototype_header(),
(intptr_t*) rcvr->mark_addr(),
mark) == mark) {
// (*counters->revoked_lock_entry_count_addr())++;
success = false;
}
}
}
} else {
cas_label:
success = false;
}
}
if (!success) {
markOop displaced = rcvr->mark()->set_unlocked();
mon->lock()->set_displaced_header(displaced);
if (Atomic::cmpxchg_ptr(mon, rcvr->mark_addr(), displaced) != displaced) {
// Is it simple recursive case?
if (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
ShouldNotReachHere(); // we don't return this.
assert(THREAD->pop_frame_in_process(), "wrong frame pop state");
istate->set_msg(no_request);
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->has_pending_exception()) goto handle_exception;
// Update the pc by the saved amount of the invoke bytecode size
UPDATE_PC(istate->bcp_advance());
goto run;
}
case deopt_resume2: {
// Returned from an opcode that will reexecute. Deopt was
// a result of a PopFrame request.
//
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;
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);
markOop displaced = lockee->mark()->set_unlocked();
entry->lock()->set_displaced_header(displaced);
if (Atomic::cmpxchg_ptr(entry, lockee->mark_addr(), displaced) != displaced) {
// Is it simple recursive case?
if (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];
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:
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");
}
}
#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"); \
} \
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"); \
} \
} \
/* 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): { \
int skip = (STACK_INT(-2) comparison STACK_INT(-1)) \
? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
address branch_pc = pc; \
UPDATE_PC_AND_TOS(skip, -2); \
DO_BACKEDGE_CHECKS(skip, branch_pc); \
CONTINUE; \
} \
CASE(_if##name): { \
int skip = (STACK_INT(-1) comparison 0) \
? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
address branch_pc = pc; \
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): { \
int skip = (STACK_OBJECT(-2) comparison STACK_OBJECT(-1)) \
? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
address branch_pc = pc; \
UPDATE_PC_AND_TOS(skip, -2); \
DO_BACKEDGE_CHECKS(skip, branch_pc); \
CONTINUE; \
}
#define NULL_COMPARISON_NOT_OP(name) \
CASE(_if##name): { \
int skip = (!(STACK_OBJECT(-1) == NULL)) \
? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
address branch_pc = pc; \
UPDATE_PC_AND_TOS(skip, -1); \
DO_BACKEDGE_CHECKS(skip, branch_pc); \
CONTINUE; \
}
#define NULL_COMPARISON_OP(name) \
CASE(_if##name): { \
int skip = ((STACK_OBJECT(-1) == NULL)) \
? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
address branch_pc = pc; \
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;
skip = ((uint32_t) key > (uint32_t)(high - low))
? Bytes::get_Java_u4((address)&lpc[0])
: Bytes::get_Java_u4((address)&lpc[key + 3]);
// 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 */
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]);
break;
}
}
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()->klass_part()->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); \
}
/* 32-bit loads. These handle conversion from < 32-bit types */
#define ARRAY_LOADTO32(T, T2, format, stackRes, extra) \
{ \
ARRAY_INTRO(-2); \
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); \
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_LOADTO32(T_OBJECT, oop, INTPTR_FORMAT, STACK_OBJECT, 0);
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); \
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); \
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 */
klassOop rhsKlassOop = rhsObject->klass(); // EBX (subclass)
assert(arrObj->klass()->klass()->klass_part()->oop_is_objArrayKlass(), "Ack not an objArrayKlass");
klassOop elemKlassOop = ((objArrayKlass*) arrObj->klass()->klass_part())->element_klass(); // superklass EAX
//
// Check for compatibilty. This check must not GC!!
// Seems way more expensive now that we must dispatch
//
if (rhsKlassOop != elemKlassOop && !rhsKlassOop->klass_part()->is_subtype_of(elemKlassOop)) { // ebx->is...
VM_JAVA_ERROR(vmSymbols::java_lang_ArrayStoreException(), "");
}
}
oop* elem_loc = (oop*)(((address) arrObj->base(T_OBJECT)) + index * sizeof(oop));
// *(oop*)(((address) arrObj->base(T_OBJECT)) + index * sizeof(oop)) = rhsObject;
*elem_loc = rhsObject;
// Mark the card
OrderAccess::release_store(&BYTE_MAP_BASE[(uintptr_t)elem_loc >> CardTableModRefBS::card_shift], 0);
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);
markOop displaced = lockee->mark()->set_unlocked();
entry->lock()->set_displaced_header(displaced);
if (Atomic::cmpxchg_ptr(entry, lockee->mark_addr(), displaced) != displaced) {
// Is it simple recursive case?
if (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 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
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);
// Should never reach here...
assert(false, "Should have thrown illegal monitor exception");
}
/* 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) {
obj = (oop) cache->f1();
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();
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) {
obj = (oop) cache->f1();
} else {
--count;
obj = (oop) STACK_OBJECT(count);
CHECK_NULL(obj);
}
//
// Now store the result
//
int field_offset = cache->f2();
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));
OrderAccess::release_store(&BYTE_MAP_BASE[(uintptr_t)obj >> CardTableModRefBS::card_shift], 0);
} 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));
OrderAccess::release_store(&BYTE_MAP_BASE[(uintptr_t)obj >> CardTableModRefBS::card_shift], 0);
} 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);
constantPoolOop constants = istate->method()->constants();
if (!constants->tag_at(index).is_unresolved_klass()) {
// Make sure klass is initialized and doesn't have a finalizer
oop entry = (klassOop) *constants->obj_at_addr(index);
assert(entry->is_klass(), "Should be resolved klass");
klassOop k_entry = (klassOop) entry;
assert(k_entry->klass_part()->oop_is_instance(), "Should be instanceKlass");
instanceKlass* ik = (instanceKlass*) k_entry->klass_part();
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);
}
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;
}
}
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);
if (ProfileInterpreter) {
// needs Profile_checkcast QQQ
ShouldNotReachHere();
}
// 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);
}
klassOop klassOf = (klassOop) *(METHOD->constants()->obj_at_addr(index));
klassOop objKlassOop = STACK_OBJECT(-1)->klass(); //ebx
//
// Check for compatibilty. This check must not GC!!
// Seems way more expensive now that we must dispatch
//
if (objKlassOop != klassOf &&
!objKlassOop->klass_part()->is_subtype_of(klassOf)) {
ResourceMark rm(THREAD);
const char* objName = Klass::cast(objKlassOop)->external_name();
const char* klassName = Klass::cast(klassOf)->external_name();
char* message = SharedRuntime::generate_class_cast_message(
objName, klassName);
VM_JAVA_ERROR(vmSymbols::java_lang_ClassCastException(), message);
}
} else {
if (UncommonNullCast) {
// istate->method()->set_null_cast_seen();
// [RGV] Not sure what to do here!
}
}
UPDATE_PC_AND_CONTINUE(3);
CASE(_instanceof):
if (STACK_OBJECT(-1) == NULL) {
SET_STACK_INT(0, -1);
} 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);
}
klassOop klassOf = (klassOop) *(METHOD->constants()->obj_at_addr(index));
klassOop objKlassOop = STACK_OBJECT(-1)->klass();
//
// Check for compatibilty. This check must not GC!!
// Seems way more expensive now that we must dispatch
//
if ( objKlassOop == klassOf || objKlassOop->klass_part()->is_subtype_of(klassOf)) {
SET_STACK_INT(1, -1);
} else {
SET_STACK_INT(0, -1);
}
}
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;
}
constantPoolOop 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:
VERIFY_OOP(constants->resolved_string_at(index));
SET_STACK_OBJECT(constants->resolved_string_at(index), 0);
break;
case JVM_CONSTANT_Class:
VERIFY_OOP(constants->resolved_klass_at(index)->klass_part()->java_mirror());
SET_STACK_OBJECT(constants->resolved_klass_at(index)->klass_part()->java_mirror(), 0);
break;
case JVM_CONSTANT_UnresolvedString:
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);
constantPoolOop 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(_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_methodInterface()) {
methodOop callee;
CHECK_NULL(STACK_OBJECT(-(cache->parameter_size())));
if (cache->is_vfinal()) {
callee = (methodOop) cache->f2();
} else {
// get receiver
int parms = cache->parameter_size();
// Same comments as invokevirtual apply here
VERIFY_OOP(STACK_OBJECT(-parms));
instanceKlass* rcvrKlass = (instanceKlass*)
STACK_OBJECT(-parms)->klass()->klass_part();
callee = (methodOop) rcvrKlass->start_of_vtable()[ cache->f2()];
}
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
methodOop callee;
klassOop iclass = (klassOop)cache->f1();
// instanceKlass* interface = (instanceKlass*) iclass->klass_part();
// get receiver
int parms = cache->parameter_size();
oop rcvr = STACK_OBJECT(-parms);
CHECK_NULL(rcvr);
instanceKlass* int2 = (instanceKlass*) rcvr->klass()->klass_part();
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(), "");
}
int mindex = cache->f2();
itableMethodEntry* im = ki->first_method_entry(rcvr->klass());
callee = im[mindex].method();
if (callee == NULL) {
VM_JAVA_ERROR(vmSymbols::java_lang_AbstractMethodError(), "");
}
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);
{
methodOop callee;
if ((Bytecodes::Code)opcode == Bytecodes::_invokevirtual) {
CHECK_NULL(STACK_OBJECT(-(cache->parameter_size())));
if (cache->is_vfinal()) callee = (methodOop) cache->f2();
else {
// get receiver
int parms = cache->parameter_size();
// this works but needs a resourcemark and seems to create a vtable on every call:
// methodOop callee = rcvr->klass()->klass_part()->vtable()->method_at(cache->f2());
//
// this fails with an assert
// instanceKlass* rcvrKlass = instanceKlass::cast(STACK_OBJECT(-parms)->klass());
// but this works
VERIFY_OOP(STACK_OBJECT(-parms));
instanceKlass* rcvrKlass = (instanceKlass*) STACK_OBJECT(-parms)->klass()->klass_part();
/*
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()->klass_part() 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()->klass_part()->oop_is_instance() == 0
However it seems to have a vtable in the right location. Huh?
*/
callee = (methodOop) rcvrKlass->start_of_vtable()[ cache->f2()];
}
} else {
if ((Bytecodes::Code)opcode == Bytecodes::_invokespecial) {
CHECK_NULL(STACK_OBJECT(-(cache->parameter_size())));
}
callee = (methodOop) cache->f1();
}
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);
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);
address branch_pc = pc;
UPDATE_PC(offset);
DO_BACKEDGE_CHECKS(offset, branch_pc);
CONTINUE;
}
/* return from a jsr or jsr_w */
CASE(_ret): {
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:
#ifdef ZERO
// Some zero configurations use the C++ interpreter as a
// fallback interpreter and have support for platform
// specific fast bytecodes which aren't supported here, so
// redispatch to the equivalent non-fast bytecode when they
// are encountered.
if (Bytecodes::is_defined((Bytecodes::Code)opcode)) {
opcode = (jubyte)Bytecodes::java_code((Bytecodes::Code)opcode);
goto opcode_switch;
}
#endif
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 = (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(), 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,
pc - (intptr_t)METHOD->code_base(),
continuation_bci, THREAD);
}
// for AbortVMOnException flag
NOT_PRODUCT(Exceptions::debug_check_abort(except_oop));
goto run;
}
if (TraceExceptions) {
ttyLocker ttyl;
ResourceMark rm;
tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", except_oop->print_value_string(), 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,
pc - (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();
handle_return:
{
DECACHE_STATE();
bool suppress_error = istate->msg() == popping_frame;
bool suppress_exit_event = THREAD->has_pending_exception() || suppress_error;
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 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(), "");
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 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();
}
}
}
}
}
}
}
//
// 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);
istate->set_return_kind((Bytecodes::Code)opcode);
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);
}
THREAD->clr_pop_frame_in_process();
}
// Normal return
// Advance the pc and return to frame manager
istate->set_msg(return_from_method);
istate->set_return_kind((Bytecodes::Code)opcode);
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 (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 (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("result_return_kind 0x%x ", (int) this->_result._return_kind);
tty->print_cr("prev_link: " INTPTR_FORMAT, (uintptr_t) this->_prev_link);
tty->print_cr("native_mirror: " INTPTR_FORMAT, (uintptr_t) 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(IA64) && !defined(ZERO)
tty->print_cr("last_Java_fp: " INTPTR_FORMAT, (uintptr_t) this->_last_Java_fp);
#endif // IA64 && !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