jdk8-mips64-public/hotspot: src/cpu/x86/vm/interp_masm_x86

src/cpu/x86/vm/interp_masm_x86_32.cpp@885ed790ecf0 (annotated)

src/cpu/x86/vm/interp_masm_x86_32.cpp

Wed, 21 May 2008 10:45:07 -0700

author: kvn
date: Wed, 21 May 2008 10:45:07 -0700
changeset 598: 885ed790ecf0
parent 435: a61af66fc99e
child 739: dc7f315e41f7
permissions: -rw-r--r--

6695810: null oop passed to encode_heap_oop_not_null
Summary: fix several problems in C2 related to Escape Analysis and Compressed Oops.
Reviewed-by: never, jrose

 /*
  * Copyright 1997-2007 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  *
  */
 #include "incls/_precompiled.incl"
 #include "incls/_interp_masm_x86_32.cpp.incl"
 // Implementation of InterpreterMacroAssembler
 #ifdef CC_INTERP
 void InterpreterMacroAssembler::get_method(Register reg) {
   movl(reg, Address(rbp, -(sizeof(BytecodeInterpreter) + 2 * wordSize)));
   movl(reg, Address(reg, byte_offset_of(BytecodeInterpreter, _method)));
 }
 #endif // CC_INTERP
 #ifndef CC_INTERP
 void InterpreterMacroAssembler::call_VM_leaf_base(
   address entry_point,
   int     number_of_arguments
 ) {
   // interpreter specific
   //
   // Note: No need to save/restore bcp & locals (rsi & rdi) pointer
   //       since these are callee saved registers and no blocking/
   //       GC can happen in leaf calls.
   // Further Note: DO NOT save/restore bcp/locals. If a caller has
   // already saved them so that it can use rsi/rdi as temporaries
   // then a save/restore here will DESTROY the copy the caller
   // saved! There used to be a save_bcp() that only happened in
   // the ASSERT path (no restore_bcp). Which caused bizarre failures
   // when jvm built with ASSERTs.
 #ifdef ASSERT
   { Label L;
     cmpl(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
     jcc(Assembler::equal, L);
     stop("InterpreterMacroAssembler::call_VM_leaf_base: last_sp != NULL");
     bind(L);
   }
 #endif
   // super call
   MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
   // interpreter specific
   // Used to ASSERT that rsi/rdi were equal to frame's bcp/locals
   // but since they may not have been saved (and we don't want to
   // save them here (see note above) the assert is invalid.
 }
 void InterpreterMacroAssembler::call_VM_base(
   Register oop_result,
   Register java_thread,
   Register last_java_sp,
   address  entry_point,
   int      number_of_arguments,
   bool     check_exceptions
 ) {
 #ifdef ASSERT
   { Label L;
     cmpl(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
     jcc(Assembler::equal, L);
     stop("InterpreterMacroAssembler::call_VM_base: last_sp != NULL");
     bind(L);
   }
 #endif /* ASSERT */
   // interpreter specific
   //
   // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
   //       really make a difference for these runtime calls, since they are
   //       slow anyway. Btw., bcp must be saved/restored since it may change
   //       due to GC.
   assert(java_thread == noreg , "not expecting a precomputed java thread");
   save_bcp();
   // super call
   MacroAssembler::call_VM_base(oop_result, java_thread, last_java_sp, entry_point, number_of_arguments, check_exceptions);
   // interpreter specific
   restore_bcp();
   restore_locals();
 }
 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) {
   if (JvmtiExport::can_pop_frame()) {
     Label L;
     // Initiate popframe handling only if it is not already being processed.  If the flag
     // has the popframe_processing bit set, it means that this code is called *during* popframe
     // handling - we don't want to reenter.
     Register pop_cond = java_thread;  // Not clear if any other register is available...
     movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset()));
     testl(pop_cond, JavaThread::popframe_pending_bit);
     jcc(Assembler::zero, L);
     testl(pop_cond, JavaThread::popframe_processing_bit);
     jcc(Assembler::notZero, L);
     // Call Interpreter::remove_activation_preserving_args_entry() to get the
     // address of the same-named entrypoint in the generated interpreter code.
     call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
     jmp(rax);
     bind(L);
     get_thread(java_thread);
   }
 }
 void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
   get_thread(rcx);
   movl(rcx, Address(rcx, JavaThread::jvmti_thread_state_offset()));
   const Address tos_addr (rcx, JvmtiThreadState::earlyret_tos_offset());
   const Address oop_addr (rcx, JvmtiThreadState::earlyret_oop_offset());
   const Address val_addr (rcx, JvmtiThreadState::earlyret_value_offset());
   const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset()
                              + in_ByteSize(wordSize));
   switch (state) {
     case atos: movl(rax, oop_addr);
                movl(oop_addr, NULL_WORD);
                verify_oop(rax, state);                break;
     case ltos: movl(rdx, val_addr1);               // fall through
     case btos:                                     // fall through
     case ctos:                                     // fall through
     case stos:                                     // fall through
     case itos: movl(rax, val_addr);                   break;
     case ftos: fld_s(val_addr);                       break;
     case dtos: fld_d(val_addr);                       break;
     case vtos: /* nothing to do */                    break;
     default  : ShouldNotReachHere();
   }
   // Clean up tos value in the thread object
   movl(tos_addr,  (int) ilgl);
   movl(val_addr,  NULL_WORD);
   movl(val_addr1, NULL_WORD);
 }
 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) {
   if (JvmtiExport::can_force_early_return()) {
     Label L;
     Register tmp = java_thread;
     movl(tmp, Address(tmp, JavaThread::jvmti_thread_state_offset()));
     testl(tmp, tmp);
     jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit;
     // Initiate earlyret handling only if it is not already being processed.
     // If the flag has the earlyret_processing bit set, it means that this code
     // is called *during* earlyret handling - we don't want to reenter.
     movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset()));
     cmpl(tmp, JvmtiThreadState::earlyret_pending);
     jcc(Assembler::notEqual, L);
     // Call Interpreter::remove_activation_early_entry() to get the address of the
     // same-named entrypoint in the generated interpreter code.
     get_thread(java_thread);
     movl(tmp, Address(java_thread, JavaThread::jvmti_thread_state_offset()));
     pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
     call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1);
     jmp(rax);
     bind(L);
     get_thread(java_thread);
   }
 }
 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) {
   assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
   movl(reg, Address(rsi, bcp_offset));
   bswap(reg);
   shrl(reg, 16);
 }
 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, Register index, int bcp_offset) {
   assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
   assert(cache != index, "must use different registers");
   load_unsigned_word(index, Address(rsi, bcp_offset));
   movl(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
   assert(sizeof(ConstantPoolCacheEntry) == 4*wordSize, "adjust code below");
   shll(index, 2); // convert from field index to ConstantPoolCacheEntry index
 }
 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, Register tmp, int bcp_offset) {
   assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
   assert(cache != tmp, "must use different register");
   load_unsigned_word(tmp, Address(rsi, bcp_offset));
   assert(sizeof(ConstantPoolCacheEntry) == 4*wordSize, "adjust code below");
                                // convert from field index to ConstantPoolCacheEntry index
                                // and from word offset to byte offset
   shll(tmp, 2 + LogBytesPerWord);
   movl(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
                                // skip past the header
   addl(cache, in_bytes(constantPoolCacheOopDesc::base_offset()));
   addl(cache, tmp);            // construct pointer to cache entry
 }
   // Generate a subtype check: branch to ok_is_subtype if sub_klass is
   // a subtype of super_klass.  EAX holds the super_klass.  Blows ECX.
   // Resets EDI to locals.  Register sub_klass cannot be any of the above.
 void InterpreterMacroAssembler::gen_subtype_check( Register Rsub_klass, Label &ok_is_subtype ) {
   assert( Rsub_klass != rax, "rax, holds superklass" );
   assert( Rsub_klass != rcx, "rcx holds 2ndary super array length" );
   assert( Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr" );
   Label not_subtype, loop;
   // Profile the not-null value's klass.
   profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, rdi
   // Load the super-klass's check offset into ECX
   movl( rcx, Address(rax, sizeof(oopDesc) + Klass::super_check_offset_offset_in_bytes() ) );
   // Load from the sub-klass's super-class display list, or a 1-word cache of
   // the secondary superclass list, or a failing value with a sentinel offset
   // if the super-klass is an interface or exceptionally deep in the Java
   // hierarchy and we have to scan the secondary superclass list the hard way.
   // See if we get an immediate positive hit
   cmpl( rax, Address(Rsub_klass,rcx,Address::times_1) );
   jcc( Assembler::equal,ok_is_subtype );
   // Check for immediate negative hit
   cmpl( rcx, sizeof(oopDesc) + Klass::secondary_super_cache_offset_in_bytes() );
   jcc( Assembler::notEqual, not_subtype );
   // Check for self
   cmpl( Rsub_klass, rax );
   jcc( Assembler::equal, ok_is_subtype );
   // Now do a linear scan of the secondary super-klass chain.
   movl( rdi, Address(Rsub_klass, sizeof(oopDesc) + Klass::secondary_supers_offset_in_bytes()) );
   // EDI holds the objArrayOop of secondary supers.
   movl( rcx, Address(rdi, arrayOopDesc::length_offset_in_bytes()));// Load the array length
   // Skip to start of data; also clear Z flag incase ECX is zero
   addl( rdi, arrayOopDesc::base_offset_in_bytes(T_OBJECT) );
   // Scan ECX words at [EDI] for occurance of EAX
   // Set NZ/Z based on last compare
   repne_scan();
   restore_locals();           // Restore EDI; Must not blow flags
   // Not equal?
   jcc( Assembler::notEqual, not_subtype );
   // Must be equal but missed in cache.  Update cache.
   movl( Address(Rsub_klass, sizeof(oopDesc) + Klass::secondary_super_cache_offset_in_bytes()), rax );
   jmp( ok_is_subtype );
   bind(not_subtype);
   profile_typecheck_failed(rcx); // blows rcx
 }
 void InterpreterMacroAssembler::f2ieee() {
   if (IEEEPrecision) {
     fstp_s(Address(rsp, 0));
     fld_s(Address(rsp, 0));
   }
 }
 void InterpreterMacroAssembler::d2ieee() {
   if (IEEEPrecision) {
     fstp_d(Address(rsp, 0));
     fld_d(Address(rsp, 0));
   }
 }
 #endif // CC_INTERP
 // Java Expression Stack
 #ifdef ASSERT
 void InterpreterMacroAssembler::verify_stack_tag(frame::Tag t) {
   if (TaggedStackInterpreter) {
     Label okay;
     cmpl(Address(rsp, wordSize), (int)t);
     jcc(Assembler::equal, okay);
     // Also compare if the stack value is zero, then the tag might
     // not have been set coming from deopt.
     cmpl(Address(rsp, 0), 0);
     jcc(Assembler::equal, okay);
     stop("Java Expression stack tag value is bad");
     bind(okay);
   }
 }
 #endif // ASSERT
 void InterpreterMacroAssembler::pop_ptr(Register r) {
   debug_only(verify_stack_tag(frame::TagReference));
   popl(r);
   if (TaggedStackInterpreter) addl(rsp, 1 * wordSize);
 }
 void InterpreterMacroAssembler::pop_ptr(Register r, Register tag) {
   popl(r);
   // Tag may not be reference for jsr, can be returnAddress
   if (TaggedStackInterpreter) popl(tag);
 }
 void InterpreterMacroAssembler::pop_i(Register r) {
   debug_only(verify_stack_tag(frame::TagValue));
   popl(r);
   if (TaggedStackInterpreter) addl(rsp, 1 * wordSize);
 }
 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) {
   debug_only(verify_stack_tag(frame::TagValue));
   popl(lo);
   if (TaggedStackInterpreter) addl(rsp, 1 * wordSize);
   debug_only(verify_stack_tag(frame::TagValue));
   popl(hi);
   if (TaggedStackInterpreter) addl(rsp, 1 * wordSize);
 }
 void InterpreterMacroAssembler::pop_f() {
   debug_only(verify_stack_tag(frame::TagValue));
   fld_s(Address(rsp, 0));
   addl(rsp, 1 * wordSize);
   if (TaggedStackInterpreter) addl(rsp, 1 * wordSize);
 }
 void InterpreterMacroAssembler::pop_d() {
   // Write double to stack contiguously and load into ST0
   pop_dtos_to_rsp();
   fld_d(Address(rsp, 0));
   addl(rsp, 2 * wordSize);
 }
 // Pop the top of the java expression stack to execution stack (which
 // happens to be the same place).
 void InterpreterMacroAssembler::pop_dtos_to_rsp() {
   if (TaggedStackInterpreter) {
     // Pop double value into scratch registers
     debug_only(verify_stack_tag(frame::TagValue));
     popl(rax);
     addl(rsp, 1* wordSize);
     debug_only(verify_stack_tag(frame::TagValue));
     popl(rdx);
     addl(rsp, 1* wordSize);
     pushl(rdx);
     pushl(rax);
   }
 }
 void InterpreterMacroAssembler::pop_ftos_to_rsp() {
   if (TaggedStackInterpreter) {
     debug_only(verify_stack_tag(frame::TagValue));
     popl(rax);
     addl(rsp, 1 * wordSize);
     pushl(rax);  // ftos is at rsp
   }
 }
 void InterpreterMacroAssembler::pop(TosState state) {
   switch (state) {
     case atos: pop_ptr(rax);                                 break;
     case btos:                                               // fall through
     case ctos:                                               // fall through
     case stos:                                               // fall through
     case itos: pop_i(rax);                                   break;
     case ltos: pop_l(rax, rdx);                              break;
     case ftos: pop_f();                                      break;
     case dtos: pop_d();                                      break;
     case vtos: /* nothing to do */                           break;
     default  : ShouldNotReachHere();
   }
   verify_oop(rax, state);
 }
 void InterpreterMacroAssembler::push_ptr(Register r) {
   if (TaggedStackInterpreter) pushl(frame::TagReference);
   pushl(r);
 }
 void InterpreterMacroAssembler::push_ptr(Register r, Register tag) {
   if (TaggedStackInterpreter) pushl(tag);  // tag first
   pushl(r);
 }
 void InterpreterMacroAssembler::push_i(Register r) {
   if (TaggedStackInterpreter) pushl(frame::TagValue);
   pushl(r);
 }
 void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
   if (TaggedStackInterpreter) pushl(frame::TagValue);
   pushl(hi);
   if (TaggedStackInterpreter) pushl(frame::TagValue);
   pushl(lo);
 }
 void InterpreterMacroAssembler::push_f() {
   if (TaggedStackInterpreter) pushl(frame::TagValue);
   // Do not schedule for no AGI! Never write beyond rsp!
   subl(rsp, 1 * wordSize);
   fstp_s(Address(rsp, 0));
 }
 void InterpreterMacroAssembler::push_d(Register r) {
   if (TaggedStackInterpreter) {
     // Double values are stored as:
     //   tag
     //   high
     //   tag
     //   low
     pushl(frame::TagValue);
     subl(rsp, 3 * wordSize);
     fstp_d(Address(rsp, 0));
     // move high word up to slot n-1
     movl(r, Address(rsp, 1*wordSize));
     movl(Address(rsp, 2*wordSize), r);
     // move tag
     movl(Address(rsp, 1*wordSize), frame::TagValue);
   } else {
     // Do not schedule for no AGI! Never write beyond rsp!
     subl(rsp, 2 * wordSize);
     fstp_d(Address(rsp, 0));
   }
 }
 void InterpreterMacroAssembler::push(TosState state) {
   verify_oop(rax, state);
   switch (state) {
     case atos: push_ptr(rax); break;
     case btos:                                               // fall through
     case ctos:                                               // fall through
     case stos:                                               // fall through
     case itos: push_i(rax);                                    break;
     case ltos: push_l(rax, rdx);                               break;
     case ftos: push_f();                                       break;
     case dtos: push_d(rax);                                    break;
     case vtos: /* nothing to do */                             break;
     default  : ShouldNotReachHere();
   }
 }
 #ifndef CC_INTERP
 // Tagged stack helpers for swap and dup
 void InterpreterMacroAssembler::load_ptr_and_tag(int n, Register val,
                                                  Register tag) {
   movl(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
   if (TaggedStackInterpreter) {
     movl(tag, Address(rsp, Interpreter::expr_tag_offset_in_bytes(n)));
   }
 }
 void InterpreterMacroAssembler::store_ptr_and_tag(int n, Register val,
                                                   Register tag) {
   movl(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
   if (TaggedStackInterpreter) {
     movl(Address(rsp, Interpreter::expr_tag_offset_in_bytes(n)), tag);
   }
 }
 // Tagged local support
 void InterpreterMacroAssembler::tag_local(frame::Tag tag, int n) {
   if (TaggedStackInterpreter) {
     if (tag == frame::TagCategory2) {
       movl(Address(rdi, Interpreter::local_tag_offset_in_bytes(n+1)), (int)frame::TagValue);
       movl(Address(rdi, Interpreter::local_tag_offset_in_bytes(n)), (int)frame::TagValue);
     } else {
       movl(Address(rdi, Interpreter::local_tag_offset_in_bytes(n)), (int)tag);
     }
   }
 }
 void InterpreterMacroAssembler::tag_local(frame::Tag tag, Register idx) {
   if (TaggedStackInterpreter) {
     if (tag == frame::TagCategory2) {
       movl(Address(rdi, idx, Interpreter::stackElementScale(),
                   Interpreter::local_tag_offset_in_bytes(1)), (int)frame::TagValue);
       movl(Address(rdi, idx, Interpreter::stackElementScale(),
                   Interpreter::local_tag_offset_in_bytes(0)), (int)frame::TagValue);
     } else {
       movl(Address(rdi, idx, Interpreter::stackElementScale(),
                              Interpreter::local_tag_offset_in_bytes(0)), (int)tag);
     }
   }
 }
 void InterpreterMacroAssembler::tag_local(Register tag, Register idx) {
   if (TaggedStackInterpreter) {
     // can only be TagValue or TagReference
     movl(Address(rdi, idx, Interpreter::stackElementScale(),
                            Interpreter::local_tag_offset_in_bytes(0)), tag);
   }
 }
 void InterpreterMacroAssembler::tag_local(Register tag, int n) {
   if (TaggedStackInterpreter) {
     // can only be TagValue or TagReference
     movl(Address(rdi, Interpreter::local_tag_offset_in_bytes(n)), tag);
   }
 }
 #ifdef ASSERT
 void InterpreterMacroAssembler::verify_local_tag(frame::Tag tag, int n) {
   if (TaggedStackInterpreter) {
      frame::Tag t = tag;
     if (tag == frame::TagCategory2) {
       Label nbl;
       t = frame::TagValue;  // change to what is stored in locals
       cmpl(Address(rdi, Interpreter::local_tag_offset_in_bytes(n+1)), (int)t);
       jcc(Assembler::equal, nbl);
       stop("Local tag is bad for long/double");
       bind(nbl);
     }
     Label notBad;
     cmpl(Address(rdi, Interpreter::local_tag_offset_in_bytes(n)), (int)t);
     jcc(Assembler::equal, notBad);
     // Also compare if the local value is zero, then the tag might
     // not have been set coming from deopt.
     cmpl(Address(rdi, Interpreter::local_offset_in_bytes(n)), 0);
     jcc(Assembler::equal, notBad);
     stop("Local tag is bad");
     bind(notBad);
   }
 }
 void InterpreterMacroAssembler::verify_local_tag(frame::Tag tag, Register idx) {
   if (TaggedStackInterpreter) {
     frame::Tag t = tag;
     if (tag == frame::TagCategory2) {
       Label nbl;
       t = frame::TagValue;  // change to what is stored in locals
       cmpl(Address(rdi, idx, Interpreter::stackElementScale(),
                   Interpreter::local_tag_offset_in_bytes(1)), (int)t);
       jcc(Assembler::equal, nbl);
       stop("Local tag is bad for long/double");
       bind(nbl);
     }
     Label notBad;
     cmpl(Address(rdi, idx, Interpreter::stackElementScale(),
                   Interpreter::local_tag_offset_in_bytes(0)), (int)t);
     jcc(Assembler::equal, notBad);
     // Also compare if the local value is zero, then the tag might
     // not have been set coming from deopt.
     cmpl(Address(rdi, idx, Interpreter::stackElementScale(),
                   Interpreter::local_offset_in_bytes(0)), 0);
     jcc(Assembler::equal, notBad);
     stop("Local tag is bad");
     bind(notBad);
   }
 }
 #endif // ASSERT
 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point) {
   MacroAssembler::call_VM_leaf_base(entry_point, 0);
 }
 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point, Register arg_1) {
   pushl(arg_1);
   MacroAssembler::call_VM_leaf_base(entry_point, 1);
 }
 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point, Register arg_1, Register arg_2) {
   pushl(arg_2);
   pushl(arg_1);
   MacroAssembler::call_VM_leaf_base(entry_point, 2);
 }
 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point, Register arg_1, Register arg_2, Register arg_3) {
   pushl(arg_3);
   pushl(arg_2);
   pushl(arg_1);
   MacroAssembler::call_VM_leaf_base(entry_point, 3);
 }
 // Jump to from_interpreted entry of a call unless single stepping is possible
 // in this thread in which case we must call the i2i entry
 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
   // set sender sp
   leal(rsi, Address(rsp, wordSize));
   // record last_sp
   movl(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), rsi);
   if (JvmtiExport::can_post_interpreter_events()) {
     Label run_compiled_code;
     // JVMTI events, such as single-stepping, are implemented partly by avoiding running
     // compiled code in threads for which the event is enabled.  Check here for
     // interp_only_mode if these events CAN be enabled.
     get_thread(temp);
     // interp_only is an int, on little endian it is sufficient to test the byte only
     // Is a cmpl faster (ce
     cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
     jcc(Assembler::zero, run_compiled_code);
     jmp(Address(method, methodOopDesc::interpreter_entry_offset()));
     bind(run_compiled_code);
   }
   jmp(Address(method, methodOopDesc::from_interpreted_offset()));
 }
 // The following two routines provide a hook so that an implementation
 // can schedule the dispatch in two parts.  Intel does not do this.
 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
   // Nothing Intel-specific to be done here.
 }
 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
   dispatch_next(state, step);
 }
 void InterpreterMacroAssembler::dispatch_base(TosState state, address* table,
                                               bool verifyoop) {
   verify_FPU(1, state);
   if (VerifyActivationFrameSize) {
     Label L;
     movl(rcx, rbp);
     subl(rcx, rsp);
     int min_frame_size = (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * wordSize;
     cmpl(rcx, min_frame_size);
     jcc(Assembler::greaterEqual, L);
     stop("broken stack frame");
     bind(L);
   }
   if (verifyoop) verify_oop(rax, state);
   Address index(noreg, rbx, Address::times_4);
   ExternalAddress tbl((address)table);
   ArrayAddress dispatch(tbl, index);
   jump(dispatch);
 }
 void InterpreterMacroAssembler::dispatch_only(TosState state) {
   dispatch_base(state, Interpreter::dispatch_table(state));
 }
 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
   dispatch_base(state, Interpreter::normal_table(state));
 }
 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
   dispatch_base(state, Interpreter::normal_table(state), false);
 }
 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) {
   // load next bytecode (load before advancing rsi to prevent AGI)
   load_unsigned_byte(rbx, Address(rsi, step));
   // advance rsi
   increment(rsi, step);
   dispatch_base(state, Interpreter::dispatch_table(state));
 }
 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
   // load current bytecode
   load_unsigned_byte(rbx, Address(rsi, 0));
   dispatch_base(state, table);
 }
 // remove activation
 //
 // Unlock the receiver if this is a synchronized method.
 // Unlock any Java monitors from syncronized blocks.
 // Remove the activation from the stack.
 //
 // If there are locked Java monitors
 //    If throw_monitor_exception
 //       throws IllegalMonitorStateException
 //    Else if install_monitor_exception
 //       installs IllegalMonitorStateException
 //    Else
 //       no error processing
 void InterpreterMacroAssembler::remove_activation(TosState state, Register ret_addr,
                                                   bool throw_monitor_exception,
                                                   bool install_monitor_exception,
                                                   bool notify_jvmdi) {
   // Note: Registers rax, rdx and FPU ST(0) may be in use for the result
   // check if synchronized method
   Label unlocked, unlock, no_unlock;
   get_thread(rcx);
   const Address do_not_unlock_if_synchronized(rcx,
     in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
   movbool(rbx, do_not_unlock_if_synchronized);
   movl(rdi,rbx);
   movbool(do_not_unlock_if_synchronized, false); // reset the flag
   movl(rbx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); // get method access flags
   movl(rcx, Address(rbx, methodOopDesc::access_flags_offset()));
   testl(rcx, JVM_ACC_SYNCHRONIZED);
   jcc(Assembler::zero, unlocked);
   // Don't unlock anything if the _do_not_unlock_if_synchronized flag
   // is set.
   movl(rcx,rdi);
   testbool(rcx);
   jcc(Assembler::notZero, no_unlock);
   // unlock monitor
   push(state);                                   // save result
   // BasicObjectLock will be first in list, since this is a synchronized method. However, need
   // to check that the object has not been unlocked by an explicit monitorexit bytecode.
   const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock));
   leal  (rdx, monitor);                          // address of first monitor
   movl  (rax, Address(rdx, BasicObjectLock::obj_offset_in_bytes()));
   testl (rax, rax);
   jcc   (Assembler::notZero, unlock);
   pop(state);
   if (throw_monitor_exception) {
     empty_FPU_stack();  // remove possible return value from FPU-stack, otherwise stack could overflow
     // Entry already unlocked, need to throw exception
     call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
     should_not_reach_here();
   } else {
     // Monitor already unlocked during a stack unroll.
     // If requested, install an illegal_monitor_state_exception.
     // Continue with stack unrolling.
     if (install_monitor_exception) {
       empty_FPU_stack();  // remove possible return value from FPU-stack, otherwise stack could overflow
       call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
     }
     jmp(unlocked);
   }
   bind(unlock);
   unlock_object(rdx);
   pop(state);
   // Check that for block-structured locking (i.e., that all locked objects has been unlocked)
   bind(unlocked);
   // rax, rdx: Might contain return value
   // Check that all monitors are unlocked
   {
     Label loop, exception, entry, restart;
     const int entry_size               = frame::interpreter_frame_monitor_size()           * wordSize;
     const Address monitor_block_top(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
     const Address monitor_block_bot(rbp, frame::interpreter_frame_initial_sp_offset        * wordSize);
     bind(restart);
     movl(rcx, monitor_block_top);             // points to current entry, starting with top-most entry
     leal(rbx, monitor_block_bot);             // points to word before bottom of monitor block
     jmp(entry);
     // Entry already locked, need to throw exception
     bind(exception);
     if (throw_monitor_exception) {
       empty_FPU_stack();  // remove possible return value from FPU-stack, otherwise stack could overflow
       // Throw exception
       call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
       should_not_reach_here();
     } else {
       // Stack unrolling. Unlock object and install illegal_monitor_exception
       // Unlock does not block, so don't have to worry about the frame
       push(state);
       movl(rdx, rcx);
       unlock_object(rdx);
       pop(state);
       if (install_monitor_exception) {
         empty_FPU_stack();  // remove possible return value from FPU-stack, otherwise stack could overflow
         call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
       }
       jmp(restart);
     }
     bind(loop);
     cmpl(Address(rcx, BasicObjectLock::obj_offset_in_bytes()), NULL_WORD);  // check if current entry is used
     jcc(Assembler::notEqual, exception);
     addl(rcx, entry_size);                       // otherwise advance to next entry
     bind(entry);
     cmpl(rcx, rbx);                              // check if bottom reached
     jcc(Assembler::notEqual, loop);              // if not at bottom then check this entry
   }
   bind(no_unlock);
   // jvmti support
   if (notify_jvmdi) {
     notify_method_exit(state, NotifyJVMTI);     // preserve TOSCA
   } else {
     notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
   }
   // remove activation
   movl(rbx, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp
   leave();                                     // remove frame anchor
   popl(ret_addr);                              // get return address
   movl(rsp, rbx);                              // set sp to sender sp
   if (UseSSE) {
     // float and double are returned in xmm register in SSE-mode
     if (state == ftos && UseSSE >= 1) {
       subl(rsp, wordSize);
       fstp_s(Address(rsp, 0));
       movflt(xmm0, Address(rsp, 0));
       addl(rsp, wordSize);
     } else if (state == dtos && UseSSE >= 2) {
       subl(rsp, 2*wordSize);
       fstp_d(Address(rsp, 0));
       movdbl(xmm0, Address(rsp, 0));
       addl(rsp, 2*wordSize);
     }
   }
 }
 #endif /* !CC_INTERP */
 // Lock object
 //
 // Argument: rdx : Points to BasicObjectLock to be used for locking. Must
 // be initialized with object to lock
 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
   assert(lock_reg == rdx, "The argument is only for looks. It must be rdx");
   if (UseHeavyMonitors) {
     call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg);
   } else {
     Label done;
     const Register swap_reg = rax;  // Must use rax, for cmpxchg instruction
     const Register obj_reg  = rcx;  // Will contain the oop
     const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
     const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
     const int mark_offset = lock_offset + BasicLock::displaced_header_offset_in_bytes();
     Label slow_case;
     // Load object pointer into obj_reg %rcx
     movl(obj_reg, Address(lock_reg, obj_offset));
     if (UseBiasedLocking) {
       // Note: we use noreg for the temporary register since it's hard
       // to come up with a free register on all incoming code paths
       biased_locking_enter(lock_reg, obj_reg, swap_reg, noreg, false, done, &slow_case);
     }
     // Load immediate 1 into swap_reg %rax,
     movl(swap_reg, 1);
     // Load (object->mark() | 1) into swap_reg %rax,
     orl(swap_reg, Address(obj_reg, 0));
     // Save (object->mark() | 1) into BasicLock's displaced header
     movl(Address(lock_reg, mark_offset), swap_reg);
     assert(lock_offset == 0, "displached header must be first word in BasicObjectLock");
     if (os::is_MP()) {
       lock();
     }
     cmpxchg(lock_reg, Address(obj_reg, 0));
     if (PrintBiasedLockingStatistics) {
       cond_inc32(Assembler::zero,
                  ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
     }
     jcc(Assembler::zero, done);
     // Test if the oopMark is an obvious stack pointer, i.e.,
     //  1) (mark & 3) == 0, and
     //  2) rsp <= mark < mark + os::pagesize()
     //
     // These 3 tests can be done by evaluating the following
     // expression: ((mark - rsp) & (3 - os::vm_page_size())),
     // assuming both stack pointer and pagesize have their
     // least significant 2 bits clear.
     // NOTE: the oopMark is in swap_reg %rax, as the result of cmpxchg
     subl(swap_reg, rsp);
     andl(swap_reg, 3 - os::vm_page_size());
     // Save the test result, for recursive case, the result is zero
     movl(Address(lock_reg, mark_offset), swap_reg);
     if (PrintBiasedLockingStatistics) {
       cond_inc32(Assembler::zero,
                  ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
     }
     jcc(Assembler::zero, done);
     bind(slow_case);
     // Call the runtime routine for slow case
     call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg);
     bind(done);
   }
 }
 // Unlocks an object. Used in monitorexit bytecode and remove_activation.
 //
 // Argument: rdx : Points to BasicObjectLock structure for lock
 // Throw an IllegalMonitorException if object is not locked by current thread
 //
 // Uses: rax, rbx, rcx, rdx
 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
   assert(lock_reg == rdx, "The argument is only for looks. It must be rdx");
   if (UseHeavyMonitors) {
     call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
   } else {
     Label done;
     const Register swap_reg   = rax;  // Must use rax, for cmpxchg instruction
     const Register header_reg = rbx;  // Will contain the old oopMark
     const Register obj_reg    = rcx;  // Will contain the oop
     save_bcp(); // Save in case of exception
     // Convert from BasicObjectLock structure to object and BasicLock structure
     // Store the BasicLock address into %rax,
     leal(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes()));
     // Load oop into obj_reg(%rcx)
     movl(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes ()));
     // Free entry
     movl(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), NULL_WORD);
     if (UseBiasedLocking) {
       biased_locking_exit(obj_reg, header_reg, done);
     }
     // Load the old header from BasicLock structure
     movl(header_reg, Address(swap_reg, BasicLock::displaced_header_offset_in_bytes()));
     // Test for recursion
     testl(header_reg, header_reg);
     // zero for recursive case
     jcc(Assembler::zero, done);
     // Atomic swap back the old header
     if (os::is_MP()) lock();
     cmpxchg(header_reg, Address(obj_reg, 0));
     // zero for recursive case
     jcc(Assembler::zero, done);
     // Call the runtime routine for slow case.
     movl(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), obj_reg); // restore obj
     call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
     bind(done);
     restore_bcp();
   }
 }
 #ifndef CC_INTERP
 // Test ImethodDataPtr.  If it is null, continue at the specified label
 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, Label& zero_continue) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   movl(mdp, Address(rbp, frame::interpreter_frame_mdx_offset * wordSize));
   testl(mdp, mdp);
   jcc(Assembler::zero, zero_continue);
 }
 // Set the method data pointer for the current bcp.
 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
   assert(ProfileInterpreter, "must be profiling interpreter");
   Label zero_continue;
   pushl(rax);
   pushl(rbx);
   get_method(rbx);
   // Test MDO to avoid the call if it is NULL.
   movl(rax, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
   testl(rax, rax);
   jcc(Assembler::zero, zero_continue);
   // rbx,: method
   // rsi: bcp
   call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, rsi);
   // rax,: mdi
   movl(rbx, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
   testl(rbx, rbx);
   jcc(Assembler::zero, zero_continue);
   addl(rbx, in_bytes(methodDataOopDesc::data_offset()));
   addl(rbx, rax);
   movl(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rbx);
   bind(zero_continue);
   popl(rbx);
   popl(rax);
 }
 void InterpreterMacroAssembler::verify_method_data_pointer() {
   assert(ProfileInterpreter, "must be profiling interpreter");
 #ifdef ASSERT
   Label verify_continue;
   pushl(rax);
   pushl(rbx);
   pushl(rcx);
   pushl(rdx);
   test_method_data_pointer(rcx, verify_continue); // If mdp is zero, continue
   get_method(rbx);
   // If the mdp is valid, it will point to a DataLayout header which is
   // consistent with the bcp.  The converse is highly probable also.
   load_unsigned_word(rdx, Address(rcx, in_bytes(DataLayout::bci_offset())));
   addl(rdx, Address(rbx, methodOopDesc::const_offset()));
   leal(rdx, Address(rdx, constMethodOopDesc::codes_offset()));
   cmpl(rdx, rsi);
   jcc(Assembler::equal, verify_continue);
   // rbx,: method
   // rsi: bcp
   // rcx: mdp
   call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), rbx, rsi, rcx);
   bind(verify_continue);
   popl(rdx);
   popl(rcx);
   popl(rbx);
   popl(rax);
 #endif // ASSERT
 }
 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, int constant, Register value) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   Address data(mdp_in, constant);
   movl(data, value);
 }
 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
                                                       int constant,
                                                       bool decrement) {
   // Counter address
   Address data(mdp_in, constant);
   increment_mdp_data_at(data, decrement);
 }
 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
                                                       bool decrement) {
   assert( DataLayout::counter_increment==1, "flow-free idiom only works with 1" );
   assert(ProfileInterpreter, "must be profiling interpreter");
   if (decrement) {
     // Decrement the register.  Set condition codes.
     addl(data, -DataLayout::counter_increment);
     // If the decrement causes the counter to overflow, stay negative
     Label L;
     jcc(Assembler::negative, L);
     addl(data, DataLayout::counter_increment);
     bind(L);
   } else {
     assert(DataLayout::counter_increment == 1,
            "flow-free idiom only works with 1");
     // Increment the register.  Set carry flag.
     addl(data, DataLayout::counter_increment);
     // If the increment causes the counter to overflow, pull back by 1.
     sbbl(data, 0);
   }
 }
 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
                                                       Register reg,
                                                       int constant,
                                                       bool decrement) {
   Address data(mdp_in, reg, Address::times_1, constant);
   increment_mdp_data_at(data, decrement);
 }
 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, int flag_byte_constant) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   int header_offset = in_bytes(DataLayout::header_offset());
   int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant);
   // Set the flag
   orl(Address(mdp_in, header_offset), header_bits);
 }
 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
                                                  int offset,
                                                  Register value,
                                                  Register test_value_out,
                                                  Label& not_equal_continue) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   if (test_value_out == noreg) {
     cmpl(value, Address(mdp_in, offset));
   } else {
     // Put the test value into a register, so caller can use it:
     movl(test_value_out, Address(mdp_in, offset));
     cmpl(test_value_out, value);
   }
   jcc(Assembler::notEqual, not_equal_continue);
 }
 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, int offset_of_disp) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   Address disp_address(mdp_in, offset_of_disp);
   addl(mdp_in,disp_address);
   movl(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
 }
 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, Register reg, int offset_of_disp) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
   addl(mdp_in, disp_address);
   movl(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
 }
 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, int constant) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   addl(mdp_in, constant);
   movl(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
 }
 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   pushl(return_bci);             // save/restore across call_VM
   call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), return_bci);
   popl(return_bci);
 }
 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, Register bumped_count) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     // Otherwise, assign to mdp
     test_method_data_pointer(mdp, profile_continue);
     // We are taking a branch.  Increment the taken count.
     // We inline increment_mdp_data_at to return bumped_count in a register
     //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
     Address data(mdp, in_bytes(JumpData::taken_offset()));
     movl(bumped_count,data);
     assert( DataLayout::counter_increment==1, "flow-free idiom only works with 1" );
     addl(bumped_count, DataLayout::counter_increment);
     sbbl(bumped_count, 0);
     movl(data,bumped_count);    // Store back out
     // The method data pointer needs to be updated to reflect the new target.
     update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
     bind (profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // We are taking a branch.  Increment the not taken count.
     increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
     // The method data pointer needs to be updated to correspond to the next bytecode
     update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
     bind (profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_call(Register mdp) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // We are making a call.  Increment the count.
     increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
     // The method data pointer needs to be updated to reflect the new target.
     update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
     bind (profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // We are making a call.  Increment the count.
     increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
     // The method data pointer needs to be updated to reflect the new target.
     update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
     bind (profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, Register mdp, Register reg2) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // We are making a call.  Increment the count.
     increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
     // Record the receiver type.
     record_klass_in_profile(receiver, mdp, reg2);
     // The method data pointer needs to be updated to reflect the new target.
     update_mdp_by_constant(mdp,
                            in_bytes(VirtualCallData::
                                     virtual_call_data_size()));
     bind(profile_continue);
   }
 }
 void InterpreterMacroAssembler::record_klass_in_profile_helper(
                                         Register receiver, Register mdp,
                                         Register reg2,
                                         int start_row, Label& done) {
   int last_row = VirtualCallData::row_limit() - 1;
   assert(start_row <= last_row, "must be work left to do");
   // Test this row for both the receiver and for null.
   // Take any of three different outcomes:
   //   1. found receiver => increment count and goto done
   //   2. found null => keep looking for case 1, maybe allocate this cell
   //   3. found something else => keep looking for cases 1 and 2
   // Case 3 is handled by a recursive call.
   for (int row = start_row; row <= last_row; row++) {
     Label next_test;
     bool test_for_null_also = (row == start_row);
     // See if the receiver is receiver[n].
     int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row));
     test_mdp_data_at(mdp, recvr_offset, receiver,
                      (test_for_null_also ? reg2 : noreg),
                      next_test);
     // (Reg2 now contains the receiver from the CallData.)
     // The receiver is receiver[n].  Increment count[n].
     int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row));
     increment_mdp_data_at(mdp, count_offset);
     jmp(done);
     bind(next_test);
     if (row == start_row) {
       // Failed the equality check on receiver[n]...  Test for null.
       testl(reg2, reg2);
       if (start_row == last_row) {
         // The only thing left to do is handle the null case.
         jcc(Assembler::notZero, done);
         break;
       }
       // Since null is rare, make it be the branch-taken case.
       Label found_null;
       jcc(Assembler::zero, found_null);
       // Put all the "Case 3" tests here.
       record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done);
       // Found a null.  Keep searching for a matching receiver,
       // but remember that this is an empty (unused) slot.
       bind(found_null);
     }
   }
   // In the fall-through case, we found no matching receiver, but we
   // observed the receiver[start_row] is NULL.
   // Fill in the receiver field and increment the count.
   int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row));
   set_mdp_data_at(mdp, recvr_offset, receiver);
   int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row));
   movl(reg2, DataLayout::counter_increment);
   set_mdp_data_at(mdp, count_offset, reg2);
   jmp(done);
 }
 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
                                                         Register mdp,
                                                         Register reg2) {
   assert(ProfileInterpreter, "must be profiling");
   Label done;
   record_klass_in_profile_helper(receiver, mdp, reg2, 0, done);
   bind (done);
 }
 void InterpreterMacroAssembler::profile_ret(Register return_bci, Register mdp) {
   if (ProfileInterpreter) {
     Label profile_continue;
     uint row;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // Update the total ret count.
     increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
     for (row = 0; row < RetData::row_limit(); row++) {
       Label next_test;
       // See if return_bci is equal to bci[n]:
       test_mdp_data_at(mdp, in_bytes(RetData::bci_offset(row)), return_bci,
                        noreg, next_test);
       // return_bci is equal to bci[n].  Increment the count.
       increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
       // The method data pointer needs to be updated to reflect the new target.
       update_mdp_by_offset(mdp, in_bytes(RetData::bci_displacement_offset(row)));
       jmp(profile_continue);
       bind(next_test);
     }
     update_mdp_for_ret(return_bci);
     bind (profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // The method data pointer needs to be updated.
     int mdp_delta = in_bytes(BitData::bit_data_size());
     if (TypeProfileCasts) {
       mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
     }
     update_mdp_by_constant(mdp, mdp_delta);
     bind (profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
   if (ProfileInterpreter && TypeProfileCasts) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     int count_offset = in_bytes(CounterData::count_offset());
     // Back up the address, since we have already bumped the mdp.
     count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
     // *Decrement* the counter.  We expect to see zero or small negatives.
     increment_mdp_data_at(mdp, count_offset, true);
     bind (profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2)
 {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // The method data pointer needs to be updated.
     int mdp_delta = in_bytes(BitData::bit_data_size());
     if (TypeProfileCasts) {
       mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
       // Record the object type.
       record_klass_in_profile(klass, mdp, reg2);
       assert(reg2 == rdi, "we know how to fix this blown reg");
       restore_locals();         // Restore EDI
     }
     update_mdp_by_constant(mdp, mdp_delta);
     bind(profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // Update the default case count
     increment_mdp_data_at(mdp, in_bytes(MultiBranchData::default_count_offset()));
     // The method data pointer needs to be updated.
     update_mdp_by_offset(mdp, in_bytes(MultiBranchData::default_displacement_offset()));
     bind (profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_switch_case(Register index, Register mdp, Register reg2) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // Build the base (index * per_case_size_in_bytes()) + case_array_offset_in_bytes()
     movl(reg2, in_bytes(MultiBranchData::per_case_size()));
     imull(index, reg2);
     addl(index, in_bytes(MultiBranchData::case_array_offset()));
     // Update the case count
     increment_mdp_data_at(mdp, index, in_bytes(MultiBranchData::relative_count_offset()));
     // The method data pointer needs to be updated.
     update_mdp_by_offset(mdp, index, in_bytes(MultiBranchData::relative_displacement_offset()));
     bind (profile_continue);
   }
 }
 #endif // !CC_INTERP
 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
   if (state == atos) MacroAssembler::verify_oop(reg);
 }
 #ifndef CC_INTERP
 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
   if (state == ftos || state == dtos) MacroAssembler::verify_FPU(stack_depth);
 }
 #endif /* CC_INTERP */
 void InterpreterMacroAssembler::notify_method_entry() {
   // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
   // track stack depth.  If it is possible to enter interp_only_mode we add
   // the code to check if the event should be sent.
   if (JvmtiExport::can_post_interpreter_events()) {
     Label L;
     get_thread(rcx);
     movl(rcx, Address(rcx, JavaThread::interp_only_mode_offset()));
     testl(rcx,rcx);
     jcc(Assembler::zero, L);
     call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_entry));
     bind(L);
   }
   {
     SkipIfEqual skip_if(this, &DTraceMethodProbes, 0);
     get_thread(rcx);
     get_method(rbx);
     call_VM_leaf(
       CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), rcx, rbx);
   }
 }
 void InterpreterMacroAssembler::notify_method_exit(
     TosState state, NotifyMethodExitMode mode) {
   // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
   // track stack depth.  If it is possible to enter interp_only_mode we add
   // the code to check if the event should be sent.
   if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
     Label L;
     // Note: frame::interpreter_frame_result has a dependency on how the
     // method result is saved across the call to post_method_exit. If this
     // is changed then the interpreter_frame_result implementation will
     // need to be updated too.
     // For c++ interpreter the result is always stored at a known location in the frame
     // template interpreter will leave it on the top of the stack.
     NOT_CC_INTERP(push(state);)
     get_thread(rcx);
     movl(rcx, Address(rcx, JavaThread::interp_only_mode_offset()));
     testl(rcx,rcx);
     jcc(Assembler::zero, L);
     call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
     bind(L);
     NOT_CC_INTERP(pop(state);)
   }
   {
     SkipIfEqual skip_if(this, &DTraceMethodProbes, 0);
     push(state);
     get_thread(rbx);
     get_method(rcx);
     call_VM_leaf(
       CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
       rbx, rcx);
     pop(state);
   }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/x86/vm/interp_masm_x86_32.cpp@885ed790ecf0 (annotated)

src/cpu/x86/vm/interp_masm_x86_32.cpp