jdk8-mips64-public/hotspot: src/cpu/x86/vm/c1_Runtime1

src/cpu/x86/vm/c1_Runtime1_x86.cpp@8c95980d0b66 (annotated)

src/cpu/x86/vm/c1_Runtime1_x86.cpp

Sat, 07 Nov 2020 10:30:02 +0800

author: aoqi
date: Sat, 07 Nov 2020 10:30:02 +0800
changeset 10026: 8c95980d0b66
parent 9448: 73d689add964
permissions: -rw-r--r--

Added tag mips-jdk8u275-b01 for changeset d3b4d62f391f

 /*
  * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #include "precompiled.hpp"
 #include "asm/assembler.hpp"
 #include "c1/c1_Defs.hpp"
 #include "c1/c1_MacroAssembler.hpp"
 #include "c1/c1_Runtime1.hpp"
 #include "interpreter/interpreter.hpp"
 #include "nativeInst_x86.hpp"
 #include "oops/compiledICHolder.hpp"
 #include "oops/oop.inline.hpp"
 #include "prims/jvmtiExport.hpp"
 #include "register_x86.hpp"
 #include "runtime/sharedRuntime.hpp"
 #include "runtime/signature.hpp"
 #include "runtime/vframeArray.hpp"
 #include "utilities/macros.hpp"
 #include "vmreg_x86.inline.hpp"
 #if INCLUDE_ALL_GCS
 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
 #endif
 // Implementation of StubAssembler
 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, int args_size) {
   // setup registers
   const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread); // is callee-saved register (Visual C++ calling conventions)
   assert(!(oop_result1->is_valid() || metadata_result->is_valid()) || oop_result1 != metadata_result, "registers must be different");
   assert(oop_result1 != thread && metadata_result != thread, "registers must be different");
   assert(args_size >= 0, "illegal args_size");
   bool align_stack = false;
 #ifdef _LP64
   // At a method handle call, the stack may not be properly aligned
   // when returning with an exception.
   align_stack = (stub_id() == Runtime1::handle_exception_from_callee_id);
 #endif
 #ifdef _LP64
   mov(c_rarg0, thread);
   set_num_rt_args(0); // Nothing on stack
 #else
   set_num_rt_args(1 + args_size);
   // push java thread (becomes first argument of C function)
   get_thread(thread);
   push(thread);
 #endif // _LP64
   int call_offset;
   if (!align_stack) {
     set_last_Java_frame(thread, noreg, rbp, NULL);
   } else {
     address the_pc = pc();
     call_offset = offset();
     set_last_Java_frame(thread, noreg, rbp, the_pc);
     andptr(rsp, -(StackAlignmentInBytes));    // Align stack
   }
   // do the call
   call(RuntimeAddress(entry));
   if (!align_stack) {
     call_offset = offset();
   }
   // verify callee-saved register
 #ifdef ASSERT
   guarantee(thread != rax, "change this code");
   push(rax);
   { Label L;
     get_thread(rax);
     cmpptr(thread, rax);
     jcc(Assembler::equal, L);
     int3();
     stop("StubAssembler::call_RT: rdi not callee saved?");
     bind(L);
   }
   pop(rax);
 #endif
   reset_last_Java_frame(thread, true);
   // discard thread and arguments
   NOT_LP64(addptr(rsp, num_rt_args()*BytesPerWord));
   // check for pending exceptions
   { Label L;
     cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD);
     jcc(Assembler::equal, L);
     // exception pending => remove activation and forward to exception handler
     movptr(rax, Address(thread, Thread::pending_exception_offset()));
     // make sure that the vm_results are cleared
     if (oop_result1->is_valid()) {
       movptr(Address(thread, JavaThread::vm_result_offset()), NULL_WORD);
     }
     if (metadata_result->is_valid()) {
       movptr(Address(thread, JavaThread::vm_result_2_offset()), NULL_WORD);
     }
     if (frame_size() == no_frame_size) {
       leave();
       jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
     } else if (_stub_id == Runtime1::forward_exception_id) {
       should_not_reach_here();
     } else {
       jump(RuntimeAddress(Runtime1::entry_for(Runtime1::forward_exception_id)));
     }
     bind(L);
   }
   // get oop results if there are any and reset the values in the thread
   if (oop_result1->is_valid()) {
     get_vm_result(oop_result1, thread);
   }
   if (metadata_result->is_valid()) {
     get_vm_result_2(metadata_result, thread);
   }
   return call_offset;
 }
 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) {
 #ifdef _LP64
   mov(c_rarg1, arg1);
 #else
   push(arg1);
 #endif // _LP64
   return call_RT(oop_result1, metadata_result, entry, 1);
 }
 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) {
 #ifdef _LP64
   if (c_rarg1 == arg2) {
     if (c_rarg2 == arg1) {
       xchgq(arg1, arg2);
     } else {
       mov(c_rarg2, arg2);
       mov(c_rarg1, arg1);
     }
   } else {
     mov(c_rarg1, arg1);
     mov(c_rarg2, arg2);
   }
 #else
   push(arg2);
   push(arg1);
 #endif // _LP64
   return call_RT(oop_result1, metadata_result, entry, 2);
 }
 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) {
 #ifdef _LP64
   // if there is any conflict use the stack
   if (arg1 == c_rarg2 || arg1 == c_rarg3 ||
       arg2 == c_rarg1 || arg1 == c_rarg3 ||
       arg3 == c_rarg1 || arg1 == c_rarg2) {
     push(arg3);
     push(arg2);
     push(arg1);
     pop(c_rarg1);
     pop(c_rarg2);
     pop(c_rarg3);
   } else {
     mov(c_rarg1, arg1);
     mov(c_rarg2, arg2);
     mov(c_rarg3, arg3);
   }
 #else
   push(arg3);
   push(arg2);
   push(arg1);
 #endif // _LP64
   return call_RT(oop_result1, metadata_result, entry, 3);
 }
 // Implementation of StubFrame
 class StubFrame: public StackObj {
  private:
   StubAssembler* _sasm;
  public:
   StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments);
   void load_argument(int offset_in_words, Register reg);
   ~StubFrame();
 };
 #define __ _sasm->
 StubFrame::StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments) {
   _sasm = sasm;
   __ set_info(name, must_gc_arguments);
   __ enter();
 }
 // load parameters that were stored with LIR_Assembler::store_parameter
 // Note: offsets for store_parameter and load_argument must match
 void StubFrame::load_argument(int offset_in_words, Register reg) {
   // rbp, + 0: link
   //     + 1: return address
   //     + 2: argument with offset 0
   //     + 3: argument with offset 1
   //     + 4: ...
   __ movptr(reg, Address(rbp, (offset_in_words + 2) * BytesPerWord));
 }
 StubFrame::~StubFrame() {
   __ leave();
   __ ret(0);
 }
 #undef __
 // Implementation of Runtime1
 #define __ sasm->
 const int float_regs_as_doubles_size_in_slots = pd_nof_fpu_regs_frame_map * 2;
 const int xmm_regs_as_doubles_size_in_slots = FrameMap::nof_xmm_regs * 2;
 // Stack layout for saving/restoring  all the registers needed during a runtime
 // call (this includes deoptimization)
 // Note: note that users of this frame may well have arguments to some runtime
 // while these values are on the stack. These positions neglect those arguments
 // but the code in save_live_registers will take the argument count into
 // account.
 //
 #ifdef _LP64
   #define SLOT2(x) x,
   #define SLOT_PER_WORD 2
 #else
   #define SLOT2(x)
   #define SLOT_PER_WORD 1
 #endif // _LP64
 enum reg_save_layout {
   // 64bit needs to keep stack 16 byte aligned. So we add some alignment dummies to make that
   // happen and will assert if the stack size we create is misaligned
 #ifdef _LP64
   align_dummy_0, align_dummy_1,
 #endif // _LP64
 #ifdef _WIN64
   // Windows always allocates space for it's argument registers (see
   // frame::arg_reg_save_area_bytes).
   arg_reg_save_1, arg_reg_save_1H,                                                          // 0, 4
   arg_reg_save_2, arg_reg_save_2H,                                                          // 8, 12
   arg_reg_save_3, arg_reg_save_3H,                                                          // 16, 20
   arg_reg_save_4, arg_reg_save_4H,                                                          // 24, 28
 #endif // _WIN64
   xmm_regs_as_doubles_off,                                                                  // 32
   float_regs_as_doubles_off = xmm_regs_as_doubles_off + xmm_regs_as_doubles_size_in_slots,  // 160
   fpu_state_off = float_regs_as_doubles_off + float_regs_as_doubles_size_in_slots,          // 224
   // fpu_state_end_off is exclusive
   fpu_state_end_off = fpu_state_off + (FPUStateSizeInWords / SLOT_PER_WORD),                // 352
   marker = fpu_state_end_off, SLOT2(markerH)                                                // 352, 356
   extra_space_offset,                                                                       // 360
 #ifdef _LP64
   r15_off = extra_space_offset, r15H_off,                                                   // 360, 364
   r14_off, r14H_off,                                                                        // 368, 372
   r13_off, r13H_off,                                                                        // 376, 380
   r12_off, r12H_off,                                                                        // 384, 388
   r11_off, r11H_off,                                                                        // 392, 396
   r10_off, r10H_off,                                                                        // 400, 404
   r9_off, r9H_off,                                                                          // 408, 412
   r8_off, r8H_off,                                                                          // 416, 420
   rdi_off, rdiH_off,                                                                        // 424, 428
 #else
   rdi_off = extra_space_offset,
 #endif // _LP64
   rsi_off, SLOT2(rsiH_off)                                                                  // 432, 436
   rbp_off, SLOT2(rbpH_off)                                                                  // 440, 444
   rsp_off, SLOT2(rspH_off)                                                                  // 448, 452
   rbx_off, SLOT2(rbxH_off)                                                                  // 456, 460
   rdx_off, SLOT2(rdxH_off)                                                                  // 464, 468
   rcx_off, SLOT2(rcxH_off)                                                                  // 472, 476
   rax_off, SLOT2(raxH_off)                                                                  // 480, 484
   saved_rbp_off, SLOT2(saved_rbpH_off)                                                      // 488, 492
   return_off, SLOT2(returnH_off)                                                            // 496, 500
   reg_save_frame_size   // As noted: neglects any parameters to runtime                     // 504
 };
 // Save off registers which might be killed by calls into the runtime.
 // Tries to smart of about FP registers.  In particular we separate
 // saving and describing the FPU registers for deoptimization since we
 // have to save the FPU registers twice if we describe them and on P4
 // saving FPU registers which don't contain anything appears
 // expensive.  The deopt blob is the only thing which needs to
 // describe FPU registers.  In all other cases it should be sufficient
 // to simply save their current value.
 static OopMap* generate_oop_map(StubAssembler* sasm, int num_rt_args,
                                 bool save_fpu_registers = true) {
   // In 64bit all the args are in regs so there are no additional stack slots
   LP64_ONLY(num_rt_args = 0);
   LP64_ONLY(assert((reg_save_frame_size * VMRegImpl::stack_slot_size) % 16 == 0, "must be 16 byte aligned");)
   int frame_size_in_slots = reg_save_frame_size + num_rt_args; // args + thread
   sasm->set_frame_size(frame_size_in_slots / VMRegImpl::slots_per_word );
   // record saved value locations in an OopMap
   // locations are offsets from sp after runtime call; num_rt_args is number of arguments in call, including thread
   OopMap* map = new OopMap(frame_size_in_slots, 0);
   map->set_callee_saved(VMRegImpl::stack2reg(rax_off + num_rt_args), rax->as_VMReg());
   map->set_callee_saved(VMRegImpl::stack2reg(rcx_off + num_rt_args), rcx->as_VMReg());
   map->set_callee_saved(VMRegImpl::stack2reg(rdx_off + num_rt_args), rdx->as_VMReg());
   map->set_callee_saved(VMRegImpl::stack2reg(rbx_off + num_rt_args), rbx->as_VMReg());
   map->set_callee_saved(VMRegImpl::stack2reg(rsi_off + num_rt_args), rsi->as_VMReg());
   map->set_callee_saved(VMRegImpl::stack2reg(rdi_off + num_rt_args), rdi->as_VMReg());
 #ifdef _LP64
   map->set_callee_saved(VMRegImpl::stack2reg(r8_off + num_rt_args),  r8->as_VMReg());
   map->set_callee_saved(VMRegImpl::stack2reg(r9_off + num_rt_args),  r9->as_VMReg());
   map->set_callee_saved(VMRegImpl::stack2reg(r10_off + num_rt_args), r10->as_VMReg());
   map->set_callee_saved(VMRegImpl::stack2reg(r11_off + num_rt_args), r11->as_VMReg());
   map->set_callee_saved(VMRegImpl::stack2reg(r12_off + num_rt_args), r12->as_VMReg());
   map->set_callee_saved(VMRegImpl::stack2reg(r13_off + num_rt_args), r13->as_VMReg());
   map->set_callee_saved(VMRegImpl::stack2reg(r14_off + num_rt_args), r14->as_VMReg());
   map->set_callee_saved(VMRegImpl::stack2reg(r15_off + num_rt_args), r15->as_VMReg());
   // This is stupid but needed.
   map->set_callee_saved(VMRegImpl::stack2reg(raxH_off + num_rt_args), rax->as_VMReg()->next());
   map->set_callee_saved(VMRegImpl::stack2reg(rcxH_off + num_rt_args), rcx->as_VMReg()->next());
   map->set_callee_saved(VMRegImpl::stack2reg(rdxH_off + num_rt_args), rdx->as_VMReg()->next());
   map->set_callee_saved(VMRegImpl::stack2reg(rbxH_off + num_rt_args), rbx->as_VMReg()->next());
   map->set_callee_saved(VMRegImpl::stack2reg(rsiH_off + num_rt_args), rsi->as_VMReg()->next());
   map->set_callee_saved(VMRegImpl::stack2reg(rdiH_off + num_rt_args), rdi->as_VMReg()->next());
   map->set_callee_saved(VMRegImpl::stack2reg(r8H_off + num_rt_args),  r8->as_VMReg()->next());
   map->set_callee_saved(VMRegImpl::stack2reg(r9H_off + num_rt_args),  r9->as_VMReg()->next());
   map->set_callee_saved(VMRegImpl::stack2reg(r10H_off + num_rt_args), r10->as_VMReg()->next());
   map->set_callee_saved(VMRegImpl::stack2reg(r11H_off + num_rt_args), r11->as_VMReg()->next());
   map->set_callee_saved(VMRegImpl::stack2reg(r12H_off + num_rt_args), r12->as_VMReg()->next());
   map->set_callee_saved(VMRegImpl::stack2reg(r13H_off + num_rt_args), r13->as_VMReg()->next());
   map->set_callee_saved(VMRegImpl::stack2reg(r14H_off + num_rt_args), r14->as_VMReg()->next());
   map->set_callee_saved(VMRegImpl::stack2reg(r15H_off + num_rt_args), r15->as_VMReg()->next());
 #endif // _LP64
   if (save_fpu_registers) {
     if (UseSSE < 2) {
       int fpu_off = float_regs_as_doubles_off;
       for (int n = 0; n < FrameMap::nof_fpu_regs; n++) {
         VMReg fpu_name_0 = FrameMap::fpu_regname(n);
         map->set_callee_saved(VMRegImpl::stack2reg(fpu_off +     num_rt_args), fpu_name_0);
         // %%% This is really a waste but we'll keep things as they were for now
         if (true) {
           map->set_callee_saved(VMRegImpl::stack2reg(fpu_off + 1 + num_rt_args), fpu_name_0->next());
         }
         fpu_off += 2;
       }
       assert(fpu_off == fpu_state_off, "incorrect number of fpu stack slots");
     }
     if (UseSSE >= 2) {
       int xmm_off = xmm_regs_as_doubles_off;
       for (int n = 0; n < FrameMap::nof_xmm_regs; n++) {
         VMReg xmm_name_0 = as_XMMRegister(n)->as_VMReg();
         map->set_callee_saved(VMRegImpl::stack2reg(xmm_off +     num_rt_args), xmm_name_0);
         // %%% This is really a waste but we'll keep things as they were for now
         if (true) {
           map->set_callee_saved(VMRegImpl::stack2reg(xmm_off + 1 + num_rt_args), xmm_name_0->next());
         }
         xmm_off += 2;
       }
       assert(xmm_off == float_regs_as_doubles_off, "incorrect number of xmm registers");
     } else if (UseSSE == 1) {
       int xmm_off = xmm_regs_as_doubles_off;
       for (int n = 0; n < FrameMap::nof_xmm_regs; n++) {
         VMReg xmm_name_0 = as_XMMRegister(n)->as_VMReg();
         map->set_callee_saved(VMRegImpl::stack2reg(xmm_off +     num_rt_args), xmm_name_0);
         xmm_off += 2;
       }
       assert(xmm_off == float_regs_as_doubles_off, "incorrect number of xmm registers");
     }
   }
   return map;
 }
 static OopMap* save_live_registers(StubAssembler* sasm, int num_rt_args,
                                    bool save_fpu_registers = true) {
   __ block_comment("save_live_registers");
   __ pusha();         // integer registers
   // assert(float_regs_as_doubles_off % 2 == 0, "misaligned offset");
   // assert(xmm_regs_as_doubles_off % 2 == 0, "misaligned offset");
   __ subptr(rsp, extra_space_offset * VMRegImpl::stack_slot_size);
 #ifdef ASSERT
   __ movptr(Address(rsp, marker * VMRegImpl::stack_slot_size), (int32_t)0xfeedbeef);
 #endif
   if (save_fpu_registers) {
     if (UseSSE < 2) {
       // save FPU stack
       __ fnsave(Address(rsp, fpu_state_off * VMRegImpl::stack_slot_size));
       __ fwait();
 #ifdef ASSERT
       Label ok;
       __ cmpw(Address(rsp, fpu_state_off * VMRegImpl::stack_slot_size), StubRoutines::fpu_cntrl_wrd_std());
       __ jccb(Assembler::equal, ok);
       __ stop("corrupted control word detected");
       __ bind(ok);
 #endif
       // Reset the control word to guard against exceptions being unmasked
       // since fstp_d can cause FPU stack underflow exceptions.  Write it
       // into the on stack copy and then reload that to make sure that the
       // current and future values are correct.
       __ movw(Address(rsp, fpu_state_off * VMRegImpl::stack_slot_size), StubRoutines::fpu_cntrl_wrd_std());
       __ frstor(Address(rsp, fpu_state_off * VMRegImpl::stack_slot_size));
       // Save the FPU registers in de-opt-able form
       __ fstp_d(Address(rsp, float_regs_as_doubles_off * VMRegImpl::stack_slot_size +  0));
       __ fstp_d(Address(rsp, float_regs_as_doubles_off * VMRegImpl::stack_slot_size +  8));
       __ fstp_d(Address(rsp, float_regs_as_doubles_off * VMRegImpl::stack_slot_size + 16));
       __ fstp_d(Address(rsp, float_regs_as_doubles_off * VMRegImpl::stack_slot_size + 24));
       __ fstp_d(Address(rsp, float_regs_as_doubles_off * VMRegImpl::stack_slot_size + 32));
       __ fstp_d(Address(rsp, float_regs_as_doubles_off * VMRegImpl::stack_slot_size + 40));
       __ fstp_d(Address(rsp, float_regs_as_doubles_off * VMRegImpl::stack_slot_size + 48));
       __ fstp_d(Address(rsp, float_regs_as_doubles_off * VMRegImpl::stack_slot_size + 56));
     }
     if (UseSSE >= 2) {
       // save XMM registers
       // XMM registers can contain float or double values, but this is not known here,
       // so always save them as doubles.
       // note that float values are _not_ converted automatically, so for float values
       // the second word contains only garbage data.
       __ movdbl(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size +  0), xmm0);
       __ movdbl(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size +  8), xmm1);
       __ movdbl(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 16), xmm2);
       __ movdbl(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 24), xmm3);
       __ movdbl(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 32), xmm4);
       __ movdbl(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 40), xmm5);
       __ movdbl(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 48), xmm6);
       __ movdbl(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 56), xmm7);
 #ifdef _LP64
       __ movdbl(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 64), xmm8);
       __ movdbl(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 72), xmm9);
       __ movdbl(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 80), xmm10);
       __ movdbl(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 88), xmm11);
       __ movdbl(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 96), xmm12);
       __ movdbl(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 104), xmm13);
       __ movdbl(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 112), xmm14);
       __ movdbl(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 120), xmm15);
 #endif // _LP64
     } else if (UseSSE == 1) {
       // save XMM registers as float because double not supported without SSE2
       __ movflt(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size +  0), xmm0);
       __ movflt(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size +  8), xmm1);
       __ movflt(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 16), xmm2);
       __ movflt(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 24), xmm3);
       __ movflt(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 32), xmm4);
       __ movflt(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 40), xmm5);
       __ movflt(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 48), xmm6);
       __ movflt(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 56), xmm7);
     }
   }
   // FPU stack must be empty now
   __ verify_FPU(0, "save_live_registers");
   return generate_oop_map(sasm, num_rt_args, save_fpu_registers);
 }
 static void restore_fpu(StubAssembler* sasm, bool restore_fpu_registers = true) {
   if (restore_fpu_registers) {
     if (UseSSE >= 2) {
       // restore XMM registers
       __ movdbl(xmm0, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size +  0));
       __ movdbl(xmm1, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size +  8));
       __ movdbl(xmm2, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 16));
       __ movdbl(xmm3, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 24));
       __ movdbl(xmm4, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 32));
       __ movdbl(xmm5, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 40));
       __ movdbl(xmm6, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 48));
       __ movdbl(xmm7, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 56));
 #ifdef _LP64
       __ movdbl(xmm8, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 64));
       __ movdbl(xmm9, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 72));
       __ movdbl(xmm10, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 80));
       __ movdbl(xmm11, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 88));
       __ movdbl(xmm12, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 96));
       __ movdbl(xmm13, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 104));
       __ movdbl(xmm14, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 112));
       __ movdbl(xmm15, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 120));
 #endif // _LP64
     } else if (UseSSE == 1) {
       // restore XMM registers
       __ movflt(xmm0, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size +  0));
       __ movflt(xmm1, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size +  8));
       __ movflt(xmm2, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 16));
       __ movflt(xmm3, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 24));
       __ movflt(xmm4, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 32));
       __ movflt(xmm5, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 40));
       __ movflt(xmm6, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 48));
       __ movflt(xmm7, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + 56));
     }
     if (UseSSE < 2) {
       __ frstor(Address(rsp, fpu_state_off * VMRegImpl::stack_slot_size));
     } else {
       // check that FPU stack is really empty
       __ verify_FPU(0, "restore_live_registers");
     }
   } else {
     // check that FPU stack is really empty
     __ verify_FPU(0, "restore_live_registers");
   }
 #ifdef ASSERT
   {
     Label ok;
     __ cmpptr(Address(rsp, marker * VMRegImpl::stack_slot_size), (int32_t)0xfeedbeef);
     __ jcc(Assembler::equal, ok);
     __ stop("bad offsets in frame");
     __ bind(ok);
   }
 #endif // ASSERT
   __ addptr(rsp, extra_space_offset * VMRegImpl::stack_slot_size);
 }
 static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) {
   __ block_comment("restore_live_registers");
   restore_fpu(sasm, restore_fpu_registers);
   __ popa();
 }
 static void restore_live_registers_except_rax(StubAssembler* sasm, bool restore_fpu_registers = true) {
   __ block_comment("restore_live_registers_except_rax");
   restore_fpu(sasm, restore_fpu_registers);
 #ifdef _LP64
   __ movptr(r15, Address(rsp, 0));
   __ movptr(r14, Address(rsp, wordSize));
   __ movptr(r13, Address(rsp, 2 * wordSize));
   __ movptr(r12, Address(rsp, 3 * wordSize));
   __ movptr(r11, Address(rsp, 4 * wordSize));
   __ movptr(r10, Address(rsp, 5 * wordSize));
   __ movptr(r9,  Address(rsp, 6 * wordSize));
   __ movptr(r8,  Address(rsp, 7 * wordSize));
   __ movptr(rdi, Address(rsp, 8 * wordSize));
   __ movptr(rsi, Address(rsp, 9 * wordSize));
   __ movptr(rbp, Address(rsp, 10 * wordSize));
   // skip rsp
   __ movptr(rbx, Address(rsp, 12 * wordSize));
   __ movptr(rdx, Address(rsp, 13 * wordSize));
   __ movptr(rcx, Address(rsp, 14 * wordSize));
   __ addptr(rsp, 16 * wordSize);
 #else
   __ pop(rdi);
   __ pop(rsi);
   __ pop(rbp);
   __ pop(rbx); // skip this value
   __ pop(rbx);
   __ pop(rdx);
   __ pop(rcx);
   __ addptr(rsp, BytesPerWord);
 #endif // _LP64
 }
 void Runtime1::initialize_pd() {
   // nothing to do
 }
 // target: the entry point of the method that creates and posts the exception oop
 // has_argument: true if the exception needs an argument (passed on stack because registers must be preserved)
 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
   // preserve all registers
   int num_rt_args = has_argument ? 2 : 1;
   OopMap* oop_map = save_live_registers(sasm, num_rt_args);
   // now all registers are saved and can be used freely
   // verify that no old value is used accidentally
   __ invalidate_registers(true, true, true, true, true, true);
   // registers used by this stub
   const Register temp_reg = rbx;
   // load argument for exception that is passed as an argument into the stub
   if (has_argument) {
 #ifdef _LP64
     __ movptr(c_rarg1, Address(rbp, 2*BytesPerWord));
 #else
     __ movptr(temp_reg, Address(rbp, 2*BytesPerWord));
     __ push(temp_reg);
 #endif // _LP64
   }
   int call_offset = __ call_RT(noreg, noreg, target, num_rt_args - 1);
   OopMapSet* oop_maps = new OopMapSet();
   oop_maps->add_gc_map(call_offset, oop_map);
   __ stop("should not reach here");
   return oop_maps;
 }
 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler *sasm) {
   __ block_comment("generate_handle_exception");
   // incoming parameters
   const Register exception_oop = rax;
   const Register exception_pc  = rdx;
   // other registers used in this stub
   const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread);
   // Save registers, if required.
   OopMapSet* oop_maps = new OopMapSet();
   OopMap* oop_map = NULL;
   switch (id) {
   case forward_exception_id:
     // We're handling an exception in the context of a compiled frame.
     // The registers have been saved in the standard places.  Perform
     // an exception lookup in the caller and dispatch to the handler
     // if found.  Otherwise unwind and dispatch to the callers
     // exception handler.
     oop_map = generate_oop_map(sasm, 1 /*thread*/);
     // load and clear pending exception oop into RAX
     __ movptr(exception_oop, Address(thread, Thread::pending_exception_offset()));
     __ movptr(Address(thread, Thread::pending_exception_offset()), NULL_WORD);
     // load issuing PC (the return address for this stub) into rdx
     __ movptr(exception_pc, Address(rbp, 1*BytesPerWord));
     // make sure that the vm_results are cleared (may be unnecessary)
     __ movptr(Address(thread, JavaThread::vm_result_offset()),   NULL_WORD);
     __ movptr(Address(thread, JavaThread::vm_result_2_offset()), NULL_WORD);
     break;
   case handle_exception_nofpu_id:
   case handle_exception_id:
     // At this point all registers MAY be live.
     oop_map = save_live_registers(sasm, 1 /*thread*/, id != handle_exception_nofpu_id);
     break;
   case handle_exception_from_callee_id: {
     // At this point all registers except exception oop (RAX) and
     // exception pc (RDX) are dead.
     const int frame_size = 2 /*BP, return address*/ NOT_LP64(+ 1 /*thread*/) WIN64_ONLY(+ frame::arg_reg_save_area_bytes / BytesPerWord);
     oop_map = new OopMap(frame_size * VMRegImpl::slots_per_word, 0);
     sasm->set_frame_size(frame_size);
     WIN64_ONLY(__ subq(rsp, frame::arg_reg_save_area_bytes));
     break;
   }
   default:  ShouldNotReachHere();
   }
 #ifdef TIERED
   // C2 can leave the fpu stack dirty
   if (UseSSE < 2) {
     __ empty_FPU_stack();
   }
 #endif // TIERED
   // verify that only rax, and rdx is valid at this time
   __ invalidate_registers(false, true, true, false, true, true);
   // verify that rax, contains a valid exception
   __ verify_not_null_oop(exception_oop);
   // load address of JavaThread object for thread-local data
   NOT_LP64(__ get_thread(thread);)
 #ifdef ASSERT
   // check that fields in JavaThread for exception oop and issuing pc are
   // empty before writing to them
   Label oop_empty;
   __ cmpptr(Address(thread, JavaThread::exception_oop_offset()), (int32_t) NULL_WORD);
   __ jcc(Assembler::equal, oop_empty);
   __ stop("exception oop already set");
   __ bind(oop_empty);
   Label pc_empty;
   __ cmpptr(Address(thread, JavaThread::exception_pc_offset()), 0);
   __ jcc(Assembler::equal, pc_empty);
   __ stop("exception pc already set");
   __ bind(pc_empty);
 #endif
   // save exception oop and issuing pc into JavaThread
   // (exception handler will load it from here)
   __ movptr(Address(thread, JavaThread::exception_oop_offset()), exception_oop);
   __ movptr(Address(thread, JavaThread::exception_pc_offset()),  exception_pc);
   // patch throwing pc into return address (has bci & oop map)
   __ movptr(Address(rbp, 1*BytesPerWord), exception_pc);
   // compute the exception handler.
   // the exception oop and the throwing pc are read from the fields in JavaThread
   int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
   oop_maps->add_gc_map(call_offset, oop_map);
   // rax: handler address
   //      will be the deopt blob if nmethod was deoptimized while we looked up
   //      handler regardless of whether handler existed in the nmethod.
   // only rax, is valid at this time, all other registers have been destroyed by the runtime call
   __ invalidate_registers(false, true, true, true, true, true);
   // patch the return address, this stub will directly return to the exception handler
   __ movptr(Address(rbp, 1*BytesPerWord), rax);
   switch (id) {
   case forward_exception_id:
   case handle_exception_nofpu_id:
   case handle_exception_id:
     // Restore the registers that were saved at the beginning.
     restore_live_registers(sasm, id != handle_exception_nofpu_id);
     break;
   case handle_exception_from_callee_id:
     // WIN64_ONLY: No need to add frame::arg_reg_save_area_bytes to SP
     // since we do a leave anyway.
     // Pop the return address.
     __ leave();
     __ pop(rcx);
     __ jmp(rcx);  // jump to exception handler
     break;
   default:  ShouldNotReachHere();
   }
   return oop_maps;
 }
 void Runtime1::generate_unwind_exception(StubAssembler *sasm) {
   // incoming parameters
   const Register exception_oop = rax;
   // callee-saved copy of exception_oop during runtime call
   const Register exception_oop_callee_saved = NOT_LP64(rsi) LP64_ONLY(r14);
   // other registers used in this stub
   const Register exception_pc = rdx;
   const Register handler_addr = rbx;
   const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread);
   // verify that only rax, is valid at this time
   __ invalidate_registers(false, true, true, true, true, true);
 #ifdef ASSERT
   // check that fields in JavaThread for exception oop and issuing pc are empty
   NOT_LP64(__ get_thread(thread);)
   Label oop_empty;
   __ cmpptr(Address(thread, JavaThread::exception_oop_offset()), 0);
   __ jcc(Assembler::equal, oop_empty);
   __ stop("exception oop must be empty");
   __ bind(oop_empty);
   Label pc_empty;
   __ cmpptr(Address(thread, JavaThread::exception_pc_offset()), 0);
   __ jcc(Assembler::equal, pc_empty);
   __ stop("exception pc must be empty");
   __ bind(pc_empty);
 #endif
   // clear the FPU stack in case any FPU results are left behind
   __ empty_FPU_stack();
   // save exception_oop in callee-saved register to preserve it during runtime calls
   __ verify_not_null_oop(exception_oop);
   __ movptr(exception_oop_callee_saved, exception_oop);
   NOT_LP64(__ get_thread(thread);)
   // Get return address (is on top of stack after leave).
   __ movptr(exception_pc, Address(rsp, 0));
   // search the exception handler address of the caller (using the return address)
   __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), thread, exception_pc);
   // rax: exception handler address of the caller
   // Only RAX and RSI are valid at this time, all other registers have been destroyed by the call.
   __ invalidate_registers(false, true, true, true, false, true);
   // move result of call into correct register
   __ movptr(handler_addr, rax);
   // Restore exception oop to RAX (required convention of exception handler).
   __ movptr(exception_oop, exception_oop_callee_saved);
   // verify that there is really a valid exception in rax
   __ verify_not_null_oop(exception_oop);
   // get throwing pc (= return address).
   // rdx has been destroyed by the call, so it must be set again
   // the pop is also necessary to simulate the effect of a ret(0)
   __ pop(exception_pc);
   // continue at exception handler (return address removed)
   // note: do *not* remove arguments when unwinding the
   //       activation since the caller assumes having
   //       all arguments on the stack when entering the
   //       runtime to determine the exception handler
   //       (GC happens at call site with arguments!)
   // rax: exception oop
   // rdx: throwing pc
   // rbx: exception handler
   __ jmp(handler_addr);
 }
 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
   // use the maximum number of runtime-arguments here because it is difficult to
   // distinguish each RT-Call.
   // Note: This number affects also the RT-Call in generate_handle_exception because
   //       the oop-map is shared for all calls.
   const int num_rt_args = 2;  // thread + dummy
   DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
   assert(deopt_blob != NULL, "deoptimization blob must have been created");
   OopMap* oop_map = save_live_registers(sasm, num_rt_args);
 #ifdef _LP64
   const Register thread = r15_thread;
   // No need to worry about dummy
   __ mov(c_rarg0, thread);
 #else
   __ push(rax); // push dummy
   const Register thread = rdi; // is callee-saved register (Visual C++ calling conventions)
   // push java thread (becomes first argument of C function)
   __ get_thread(thread);
   __ push(thread);
 #endif // _LP64
   __ set_last_Java_frame(thread, noreg, rbp, NULL);
   // do the call
   __ call(RuntimeAddress(target));
   OopMapSet* oop_maps = new OopMapSet();
   oop_maps->add_gc_map(__ offset(), oop_map);
   // verify callee-saved register
 #ifdef ASSERT
   guarantee(thread != rax, "change this code");
   __ push(rax);
   { Label L;
     __ get_thread(rax);
     __ cmpptr(thread, rax);
     __ jcc(Assembler::equal, L);
     __ stop("StubAssembler::call_RT: rdi/r15 not callee saved?");
     __ bind(L);
   }
   __ pop(rax);
 #endif
   __ reset_last_Java_frame(thread, true);
 #ifndef _LP64
   __ pop(rcx); // discard thread arg
   __ pop(rcx); // discard dummy
 #endif // _LP64
   // check for pending exceptions
   { Label L;
     __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD);
     __ jcc(Assembler::equal, L);
     // exception pending => remove activation and forward to exception handler
     __ testptr(rax, rax);                                   // have we deoptimized?
     __ jump_cc(Assembler::equal,
                RuntimeAddress(Runtime1::entry_for(Runtime1::forward_exception_id)));
     // the deopt blob expects exceptions in the special fields of
     // JavaThread, so copy and clear pending exception.
     // load and clear pending exception
     __ movptr(rax, Address(thread, Thread::pending_exception_offset()));
     __ movptr(Address(thread, Thread::pending_exception_offset()), NULL_WORD);
     // check that there is really a valid exception
     __ verify_not_null_oop(rax);
     // load throwing pc: this is the return address of the stub
     __ movptr(rdx, Address(rsp, return_off * VMRegImpl::stack_slot_size));
 #ifdef ASSERT
     // check that fields in JavaThread for exception oop and issuing pc are empty
     Label oop_empty;
     __ cmpptr(Address(thread, JavaThread::exception_oop_offset()), (int32_t)NULL_WORD);
     __ jcc(Assembler::equal, oop_empty);
     __ stop("exception oop must be empty");
     __ bind(oop_empty);
     Label pc_empty;
     __ cmpptr(Address(thread, JavaThread::exception_pc_offset()), (int32_t)NULL_WORD);
     __ jcc(Assembler::equal, pc_empty);
     __ stop("exception pc must be empty");
     __ bind(pc_empty);
 #endif
     // store exception oop and throwing pc to JavaThread
     __ movptr(Address(thread, JavaThread::exception_oop_offset()), rax);
     __ movptr(Address(thread, JavaThread::exception_pc_offset()), rdx);
     restore_live_registers(sasm);
     __ leave();
     __ addptr(rsp, BytesPerWord);  // remove return address from stack
     // Forward the exception directly to deopt blob. We can blow no
     // registers and must leave throwing pc on the stack.  A patch may
     // have values live in registers so the entry point with the
     // exception in tls.
     __ jump(RuntimeAddress(deopt_blob->unpack_with_exception_in_tls()));
     __ bind(L);
   }
   // Runtime will return true if the nmethod has been deoptimized during
   // the patching process. In that case we must do a deopt reexecute instead.
   Label reexecuteEntry, cont;
   __ testptr(rax, rax);                                 // have we deoptimized?
   __ jcc(Assembler::equal, cont);                       // no
   // Will reexecute. Proper return address is already on the stack we just restore
   // registers, pop all of our frame but the return address and jump to the deopt blob
   restore_live_registers(sasm);
   __ leave();
   __ jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
   __ bind(cont);
   restore_live_registers(sasm);
   __ leave();
   __ ret(0);
   return oop_maps;
 }
 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
   // for better readability
   const bool must_gc_arguments = true;
   const bool dont_gc_arguments = false;
   // default value; overwritten for some optimized stubs that are called from methods that do not use the fpu
   bool save_fpu_registers = true;
   // stub code & info for the different stubs
   OopMapSet* oop_maps = NULL;
   switch (id) {
     case forward_exception_id:
       {
         oop_maps = generate_handle_exception(id, sasm);
         __ leave();
         __ ret(0);
       }
       break;
     case new_instance_id:
     case fast_new_instance_id:
     case fast_new_instance_init_check_id:
       {
         Register klass = rdx; // Incoming
         Register obj   = rax; // Result
         if (id == new_instance_id) {
           __ set_info("new_instance", dont_gc_arguments);
         } else if (id == fast_new_instance_id) {
           __ set_info("fast new_instance", dont_gc_arguments);
         } else {
           assert(id == fast_new_instance_init_check_id, "bad StubID");
           __ set_info("fast new_instance init check", dont_gc_arguments);
         }
         if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) &&
             UseTLAB && FastTLABRefill) {
           Label slow_path;
           Register obj_size = rcx;
           Register t1       = rbx;
           Register t2       = rsi;
           assert_different_registers(klass, obj, obj_size, t1, t2);
           __ push(rdi);
           __ push(rbx);
           if (id == fast_new_instance_init_check_id) {
             // make sure the klass is initialized
             __ cmpb(Address(klass, InstanceKlass::init_state_offset()), InstanceKlass::fully_initialized);
             __ jcc(Assembler::notEqual, slow_path);
           }
 #ifdef ASSERT
           // assert object can be fast path allocated
           {
             Label ok, not_ok;
             __ movl(obj_size, Address(klass, Klass::layout_helper_offset()));
             __ cmpl(obj_size, 0);  // make sure it's an instance (LH > 0)
             __ jcc(Assembler::lessEqual, not_ok);
             __ testl(obj_size, Klass::_lh_instance_slow_path_bit);
             __ jcc(Assembler::zero, ok);
             __ bind(not_ok);
             __ stop("assert(can be fast path allocated)");
             __ should_not_reach_here();
             __ bind(ok);
           }
 #endif // ASSERT
           // if we got here then the TLAB allocation failed, so try
           // refilling the TLAB or allocating directly from eden.
           Label retry_tlab, try_eden;
           const Register thread =
             __ tlab_refill(retry_tlab, try_eden, slow_path); // does not destroy rdx (klass), returns rdi
           __ bind(retry_tlab);
           // get the instance size (size is postive so movl is fine for 64bit)
           __ movl(obj_size, Address(klass, Klass::layout_helper_offset()));
           __ tlab_allocate(obj, obj_size, 0, t1, t2, slow_path);
           __ initialize_object(obj, klass, obj_size, 0, t1, t2);
           __ verify_oop(obj);
           __ pop(rbx);
           __ pop(rdi);
           __ ret(0);
           __ bind(try_eden);
           // get the instance size (size is postive so movl is fine for 64bit)
           __ movl(obj_size, Address(klass, Klass::layout_helper_offset()));
           __ eden_allocate(obj, obj_size, 0, t1, slow_path);
           __ incr_allocated_bytes(thread, obj_size, 0);
           __ initialize_object(obj, klass, obj_size, 0, t1, t2);
           __ verify_oop(obj);
           __ pop(rbx);
           __ pop(rdi);
           __ ret(0);
           __ bind(slow_path);
           __ pop(rbx);
           __ pop(rdi);
         }
         __ enter();
         OopMap* map = save_live_registers(sasm, 2);
         int call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_instance), klass);
         oop_maps = new OopMapSet();
         oop_maps->add_gc_map(call_offset, map);
         restore_live_registers_except_rax(sasm);
         __ verify_oop(obj);
         __ leave();
         __ ret(0);
         // rax,: new instance
       }
       break;
     case counter_overflow_id:
       {
         Register bci = rax, method = rbx;
         __ enter();
         OopMap* map = save_live_registers(sasm, 3);
         // Retrieve bci
         __ movl(bci, Address(rbp, 2*BytesPerWord));
         // And a pointer to the Method*
         __ movptr(method, Address(rbp, 3*BytesPerWord));
         int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, counter_overflow), bci, method);
         oop_maps = new OopMapSet();
         oop_maps->add_gc_map(call_offset, map);
         restore_live_registers(sasm);
         __ leave();
         __ ret(0);
       }
       break;
     case new_type_array_id:
     case new_object_array_id:
       {
         Register length   = rbx; // Incoming
         Register klass    = rdx; // Incoming
         Register obj      = rax; // Result
         if (id == new_type_array_id) {
           __ set_info("new_type_array", dont_gc_arguments);
         } else {
           __ set_info("new_object_array", dont_gc_arguments);
         }
 #ifdef ASSERT
         // assert object type is really an array of the proper kind
         {
           Label ok;
           Register t0 = obj;
           __ movl(t0, Address(klass, Klass::layout_helper_offset()));
           __ sarl(t0, Klass::_lh_array_tag_shift);
           int tag = ((id == new_type_array_id)
                      ? Klass::_lh_array_tag_type_value
                      : Klass::_lh_array_tag_obj_value);
           __ cmpl(t0, tag);
           __ jcc(Assembler::equal, ok);
           __ stop("assert(is an array klass)");
           __ should_not_reach_here();
           __ bind(ok);
         }
 #endif // ASSERT
         if (UseTLAB && FastTLABRefill) {
           Register arr_size = rsi;
           Register t1       = rcx;  // must be rcx for use as shift count
           Register t2       = rdi;
           Label slow_path;
           assert_different_registers(length, klass, obj, arr_size, t1, t2);
           // check that array length is small enough for fast path.
           __ cmpl(length, C1_MacroAssembler::max_array_allocation_length);
           __ jcc(Assembler::above, slow_path);
           // if we got here then the TLAB allocation failed, so try
           // refilling the TLAB or allocating directly from eden.
           Label retry_tlab, try_eden;
           const Register thread =
             __ tlab_refill(retry_tlab, try_eden, slow_path); // preserves rbx & rdx, returns rdi
           __ bind(retry_tlab);
           // get the allocation size: round_up(hdr + length << (layout_helper & 0x1F))
           // since size is positive movl does right thing on 64bit
           __ movl(t1, Address(klass, Klass::layout_helper_offset()));
           // since size is postive movl does right thing on 64bit
           __ movl(arr_size, length);
           assert(t1 == rcx, "fixed register usage");
           __ shlptr(arr_size /* by t1=rcx, mod 32 */);
           __ shrptr(t1, Klass::_lh_header_size_shift);
           __ andptr(t1, Klass::_lh_header_size_mask);
           __ addptr(arr_size, t1);
           __ addptr(arr_size, MinObjAlignmentInBytesMask); // align up
           __ andptr(arr_size, ~MinObjAlignmentInBytesMask);
           __ tlab_allocate(obj, arr_size, 0, t1, t2, slow_path);  // preserves arr_size
           __ initialize_header(obj, klass, length, t1, t2);
           __ movb(t1, Address(klass, in_bytes(Klass::layout_helper_offset()) + (Klass::_lh_header_size_shift / BitsPerByte)));
           assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise");
           assert(Klass::_lh_header_size_mask <= 0xFF, "bytewise");
           __ andptr(t1, Klass::_lh_header_size_mask);
           __ subptr(arr_size, t1);  // body length
           __ addptr(t1, obj);       // body start
           __ initialize_body(t1, arr_size, 0, t2);
           __ verify_oop(obj);
           __ ret(0);
           __ bind(try_eden);
           // get the allocation size: round_up(hdr + length << (layout_helper & 0x1F))
           // since size is positive movl does right thing on 64bit
           __ movl(t1, Address(klass, Klass::layout_helper_offset()));
           // since size is postive movl does right thing on 64bit
           __ movl(arr_size, length);
           assert(t1 == rcx, "fixed register usage");
           __ shlptr(arr_size /* by t1=rcx, mod 32 */);
           __ shrptr(t1, Klass::_lh_header_size_shift);
           __ andptr(t1, Klass::_lh_header_size_mask);
           __ addptr(arr_size, t1);
           __ addptr(arr_size, MinObjAlignmentInBytesMask); // align up
           __ andptr(arr_size, ~MinObjAlignmentInBytesMask);
           __ eden_allocate(obj, arr_size, 0, t1, slow_path);  // preserves arr_size
           __ incr_allocated_bytes(thread, arr_size, 0);
           __ initialize_header(obj, klass, length, t1, t2);
           __ movb(t1, Address(klass, in_bytes(Klass::layout_helper_offset()) + (Klass::_lh_header_size_shift / BitsPerByte)));
           assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise");
           assert(Klass::_lh_header_size_mask <= 0xFF, "bytewise");
           __ andptr(t1, Klass::_lh_header_size_mask);
           __ subptr(arr_size, t1);  // body length
           __ addptr(t1, obj);       // body start
           __ initialize_body(t1, arr_size, 0, t2);
           __ verify_oop(obj);
           __ ret(0);
           __ bind(slow_path);
         }
         __ enter();
         OopMap* map = save_live_registers(sasm, 3);
         int call_offset;
         if (id == new_type_array_id) {
           call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_type_array), klass, length);
         } else {
           call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_object_array), klass, length);
         }
         oop_maps = new OopMapSet();
         oop_maps->add_gc_map(call_offset, map);
         restore_live_registers_except_rax(sasm);
         __ verify_oop(obj);
         __ leave();
         __ ret(0);
         // rax,: new array
       }
       break;
     case new_multi_array_id:
       { StubFrame f(sasm, "new_multi_array", dont_gc_arguments);
         // rax,: klass
         // rbx,: rank
         // rcx: address of 1st dimension
         OopMap* map = save_live_registers(sasm, 4);
         int call_offset = __ call_RT(rax, noreg, CAST_FROM_FN_PTR(address, new_multi_array), rax, rbx, rcx);
         oop_maps = new OopMapSet();
         oop_maps->add_gc_map(call_offset, map);
         restore_live_registers_except_rax(sasm);
         // rax,: new multi array
         __ verify_oop(rax);
       }
       break;
     case register_finalizer_id:
       {
         __ set_info("register_finalizer", dont_gc_arguments);
         // This is called via call_runtime so the arguments
         // will be place in C abi locations
 #ifdef _LP64
         __ verify_oop(c_rarg0);
         __ mov(rax, c_rarg0);
 #else
         // The object is passed on the stack and we haven't pushed a
         // frame yet so it's one work away from top of stack.
         __ movptr(rax, Address(rsp, 1 * BytesPerWord));
         __ verify_oop(rax);
 #endif // _LP64
         // load the klass and check the has finalizer flag
         Label register_finalizer;
         Register t = rsi;
         __ load_klass(t, rax);
         __ movl(t, Address(t, Klass::access_flags_offset()));
         __ testl(t, JVM_ACC_HAS_FINALIZER);
         __ jcc(Assembler::notZero, register_finalizer);
         __ ret(0);
         __ bind(register_finalizer);
         __ enter();
         OopMap* oop_map = save_live_registers(sasm, 2 /*num_rt_args */);
         int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), rax);
         oop_maps = new OopMapSet();
         oop_maps->add_gc_map(call_offset, oop_map);
         // Now restore all the live registers
         restore_live_registers(sasm);
         __ leave();
         __ ret(0);
       }
       break;
     case throw_range_check_failed_id:
       { StubFrame f(sasm, "range_check_failed", dont_gc_arguments);
         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true);
       }
       break;
     case throw_index_exception_id:
       { StubFrame f(sasm, "index_range_check_failed", dont_gc_arguments);
         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
       }
       break;
     case throw_div0_exception_id:
       { StubFrame f(sasm, "throw_div0_exception", dont_gc_arguments);
         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
       }
       break;
     case throw_null_pointer_exception_id:
       { StubFrame f(sasm, "throw_null_pointer_exception", dont_gc_arguments);
         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
       }
       break;
     case handle_exception_nofpu_id:
     case handle_exception_id:
       { StubFrame f(sasm, "handle_exception", dont_gc_arguments);
         oop_maps = generate_handle_exception(id, sasm);
       }
       break;
     case handle_exception_from_callee_id:
       { StubFrame f(sasm, "handle_exception_from_callee", dont_gc_arguments);
         oop_maps = generate_handle_exception(id, sasm);
       }
       break;
     case unwind_exception_id:
       { __ set_info("unwind_exception", dont_gc_arguments);
         // note: no stubframe since we are about to leave the current
         //       activation and we are calling a leaf VM function only.
         generate_unwind_exception(sasm);
       }
       break;
     case throw_array_store_exception_id:
       { StubFrame f(sasm, "throw_array_store_exception", dont_gc_arguments);
         // tos + 0: link
         //     + 1: return address
         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true);
       }
       break;
     case throw_class_cast_exception_id:
       { StubFrame f(sasm, "throw_class_cast_exception", dont_gc_arguments);
         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
       }
       break;
     case throw_incompatible_class_change_error_id:
       { StubFrame f(sasm, "throw_incompatible_class_cast_exception", dont_gc_arguments);
         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
       }
       break;
     case slow_subtype_check_id:
       {
         // Typical calling sequence:
         // __ push(klass_RInfo);  // object klass or other subclass
         // __ push(sup_k_RInfo);  // array element klass or other superclass
         // __ call(slow_subtype_check);
         // Note that the subclass is pushed first, and is therefore deepest.
         // Previous versions of this code reversed the names 'sub' and 'super'.
         // This was operationally harmless but made the code unreadable.
         enum layout {
           rax_off, SLOT2(raxH_off)
           rcx_off, SLOT2(rcxH_off)
           rsi_off, SLOT2(rsiH_off)
           rdi_off, SLOT2(rdiH_off)
           // saved_rbp_off, SLOT2(saved_rbpH_off)
           return_off, SLOT2(returnH_off)
           sup_k_off, SLOT2(sup_kH_off)
           klass_off, SLOT2(superH_off)
           framesize,
           result_off = klass_off  // deepest argument is also the return value
         };
         __ set_info("slow_subtype_check", dont_gc_arguments);
         __ push(rdi);
         __ push(rsi);
         __ push(rcx);
         __ push(rax);
         // This is called by pushing args and not with C abi
         __ movptr(rsi, Address(rsp, (klass_off) * VMRegImpl::stack_slot_size)); // subclass
         __ movptr(rax, Address(rsp, (sup_k_off) * VMRegImpl::stack_slot_size)); // superclass
         Label miss;
         __ check_klass_subtype_slow_path(rsi, rax, rcx, rdi, NULL, &miss);
         // fallthrough on success:
         __ movptr(Address(rsp, (result_off) * VMRegImpl::stack_slot_size), 1); // result
         __ pop(rax);
         __ pop(rcx);
         __ pop(rsi);
         __ pop(rdi);
         __ ret(0);
         __ bind(miss);
         __ movptr(Address(rsp, (result_off) * VMRegImpl::stack_slot_size), NULL_WORD); // result
         __ pop(rax);
         __ pop(rcx);
         __ pop(rsi);
         __ pop(rdi);
         __ ret(0);
       }
       break;
     case monitorenter_nofpu_id:
       save_fpu_registers = false;
       // fall through
     case monitorenter_id:
       {
         StubFrame f(sasm, "monitorenter", dont_gc_arguments);
         OopMap* map = save_live_registers(sasm, 3, save_fpu_registers);
         // Called with store_parameter and not C abi
         f.load_argument(1, rax); // rax,: object
         f.load_argument(0, rbx); // rbx,: lock address
         int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), rax, rbx);
         oop_maps = new OopMapSet();
         oop_maps->add_gc_map(call_offset, map);
         restore_live_registers(sasm, save_fpu_registers);
       }
       break;
     case monitorexit_nofpu_id:
       save_fpu_registers = false;
       // fall through
     case monitorexit_id:
       {
         StubFrame f(sasm, "monitorexit", dont_gc_arguments);
         OopMap* map = save_live_registers(sasm, 2, save_fpu_registers);
         // Called with store_parameter and not C abi
         f.load_argument(0, rax); // rax,: lock address
         // note: really a leaf routine but must setup last java sp
         //       => use call_RT for now (speed can be improved by
         //       doing last java sp setup manually)
         int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), rax);
         oop_maps = new OopMapSet();
         oop_maps->add_gc_map(call_offset, map);
         restore_live_registers(sasm, save_fpu_registers);
       }
       break;
     case deoptimize_id:
       {
         StubFrame f(sasm, "deoptimize", dont_gc_arguments);
         const int num_rt_args = 1;  // thread
         OopMap* oop_map = save_live_registers(sasm, num_rt_args);
         int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, deoptimize));
         oop_maps = new OopMapSet();
         oop_maps->add_gc_map(call_offset, oop_map);
         restore_live_registers(sasm);
         DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
         assert(deopt_blob != NULL, "deoptimization blob must have been created");
         __ leave();
         __ jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
       }
       break;
     case access_field_patching_id:
       { StubFrame f(sasm, "access_field_patching", dont_gc_arguments);
         // we should set up register map
         oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
       }
       break;
     case load_klass_patching_id:
       { StubFrame f(sasm, "load_klass_patching", dont_gc_arguments);
         // we should set up register map
         oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
       }
       break;
     case load_mirror_patching_id:
       { StubFrame f(sasm, "load_mirror_patching", dont_gc_arguments);
         // we should set up register map
         oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
       }
       break;
     case load_appendix_patching_id:
       { StubFrame f(sasm, "load_appendix_patching", dont_gc_arguments);
         // we should set up register map
         oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
       }
       break;
     case dtrace_object_alloc_id:
       { // rax,: object
         StubFrame f(sasm, "dtrace_object_alloc", dont_gc_arguments);
         // we can't gc here so skip the oopmap but make sure that all
         // the live registers get saved.
         save_live_registers(sasm, 1);
         __ NOT_LP64(push(rax)) LP64_ONLY(mov(c_rarg0, rax));
         __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc)));
         NOT_LP64(__ pop(rax));
         restore_live_registers(sasm);
       }
       break;
     case fpu2long_stub_id:
       {
         // rax, and rdx are destroyed, but should be free since the result is returned there
         // preserve rsi,ecx
         __ push(rsi);
         __ push(rcx);
         LP64_ONLY(__ push(rdx);)
         // check for NaN
         Label return0, do_return, return_min_jlong, do_convert;
         Address value_high_word(rsp, wordSize + 4);
         Address value_low_word(rsp, wordSize);
         Address result_high_word(rsp, 3*wordSize + 4);
         Address result_low_word(rsp, 3*wordSize);
         __ subptr(rsp, 32);                    // more than enough on 32bit
         __ fst_d(value_low_word);
         __ movl(rax, value_high_word);
         __ andl(rax, 0x7ff00000);
         __ cmpl(rax, 0x7ff00000);
         __ jcc(Assembler::notEqual, do_convert);
         __ movl(rax, value_high_word);
         __ andl(rax, 0xfffff);
         __ orl(rax, value_low_word);
         __ jcc(Assembler::notZero, return0);
         __ bind(do_convert);
         __ fnstcw(Address(rsp, 0));
         __ movzwl(rax, Address(rsp, 0));
         __ orl(rax, 0xc00);
         __ movw(Address(rsp, 2), rax);
         __ fldcw(Address(rsp, 2));
         __ fwait();
         __ fistp_d(result_low_word);
         __ fldcw(Address(rsp, 0));
         __ fwait();
         // This gets the entire long in rax on 64bit
         __ movptr(rax, result_low_word);
         // testing of high bits
         __ movl(rdx, result_high_word);
         __ mov(rcx, rax);
         // What the heck is the point of the next instruction???
         __ xorl(rcx, 0x0);
         __ movl(rsi, 0x80000000);
         __ xorl(rsi, rdx);
         __ orl(rcx, rsi);
         __ jcc(Assembler::notEqual, do_return);
         __ fldz();
         __ fcomp_d(value_low_word);
         __ fnstsw_ax();
 #ifdef _LP64
         __ testl(rax, 0x4100);  // ZF & CF == 0
         __ jcc(Assembler::equal, return_min_jlong);
 #else
         __ sahf();
         __ jcc(Assembler::above, return_min_jlong);
 #endif // _LP64
         // return max_jlong
 #ifndef _LP64
         __ movl(rdx, 0x7fffffff);
         __ movl(rax, 0xffffffff);
 #else
         __ mov64(rax, CONST64(0x7fffffffffffffff));
 #endif // _LP64
         __ jmp(do_return);
         __ bind(return_min_jlong);
 #ifndef _LP64
         __ movl(rdx, 0x80000000);
         __ xorl(rax, rax);
 #else
         __ mov64(rax, CONST64(0x8000000000000000));
 #endif // _LP64
         __ jmp(do_return);
         __ bind(return0);
         __ fpop();
 #ifndef _LP64
         __ xorptr(rdx,rdx);
         __ xorptr(rax,rax);
 #else
         __ xorptr(rax, rax);
 #endif // _LP64
         __ bind(do_return);
         __ addptr(rsp, 32);
         LP64_ONLY(__ pop(rdx);)
         __ pop(rcx);
         __ pop(rsi);
         __ ret(0);
       }
       break;
 #if INCLUDE_ALL_GCS
     case g1_pre_barrier_slow_id:
       {
         StubFrame f(sasm, "g1_pre_barrier", dont_gc_arguments);
         // arg0 : previous value of memory
         BarrierSet* bs = Universe::heap()->barrier_set();
         if (bs->kind() != BarrierSet::G1SATBCTLogging) {
           __ movptr(rax, (int)id);
           __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), rax);
           __ should_not_reach_here();
           break;
         }
         __ push(rax);
         __ push(rdx);
         const Register pre_val = rax;
         const Register thread = NOT_LP64(rax) LP64_ONLY(r15_thread);
         const Register tmp = rdx;
         NOT_LP64(__ get_thread(thread);)
         Address in_progress(thread, in_bytes(JavaThread::satb_mark_queue_offset() +
                                              PtrQueue::byte_offset_of_active()));
         Address queue_index(thread, in_bytes(JavaThread::satb_mark_queue_offset() +
                                              PtrQueue::byte_offset_of_index()));
         Address buffer(thread, in_bytes(JavaThread::satb_mark_queue_offset() +
                                         PtrQueue::byte_offset_of_buf()));
         Label done;
         Label runtime;
         // Can we store original value in the thread's buffer?
 #ifdef _LP64
         __ movslq(tmp, queue_index);
         __ cmpq(tmp, 0);
 #else
         __ cmpl(queue_index, 0);
 #endif
         __ jcc(Assembler::equal, runtime);
 #ifdef _LP64
         __ subq(tmp, wordSize);
         __ movl(queue_index, tmp);
         __ addq(tmp, buffer);
 #else
         __ subl(queue_index, wordSize);
         __ movl(tmp, buffer);
         __ addl(tmp, queue_index);
 #endif
         // prev_val (rax)
         f.load_argument(0, pre_val);
         __ movptr(Address(tmp, 0), pre_val);
         __ jmp(done);
         __ bind(runtime);
         save_live_registers(sasm, 3);
         // load the pre-value
         f.load_argument(0, rcx);
         __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_pre), rcx, thread);
         restore_live_registers(sasm);
         __ bind(done);
         __ pop(rdx);
         __ pop(rax);
       }
       break;
     case g1_post_barrier_slow_id:
       {
         StubFrame f(sasm, "g1_post_barrier", dont_gc_arguments);
         // arg0: store_address
         Address store_addr(rbp, 2*BytesPerWord);
         BarrierSet* bs = Universe::heap()->barrier_set();
         CardTableModRefBS* ct = (CardTableModRefBS*)bs;
         assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code");
         Label done;
         Label runtime;
         // At this point we know new_value is non-NULL and the new_value crosses regions.
         // Must check to see if card is already dirty
         const Register thread = NOT_LP64(rax) LP64_ONLY(r15_thread);
         Address queue_index(thread, in_bytes(JavaThread::dirty_card_queue_offset() +
                                              PtrQueue::byte_offset_of_index()));
         Address buffer(thread, in_bytes(JavaThread::dirty_card_queue_offset() +
                                         PtrQueue::byte_offset_of_buf()));
         __ push(rax);
         __ push(rcx);
         const Register cardtable = rax;
         const Register card_addr = rcx;
         f.load_argument(0, card_addr);
         __ shrptr(card_addr, CardTableModRefBS::card_shift);
         // Do not use ExternalAddress to load 'byte_map_base', since 'byte_map_base' is NOT
         // a valid address and therefore is not properly handled by the relocation code.
         __ movptr(cardtable, (intptr_t)ct->byte_map_base);
         __ addptr(card_addr, cardtable);
         NOT_LP64(__ get_thread(thread);)
         __ cmpb(Address(card_addr, 0), (int)G1SATBCardTableModRefBS::g1_young_card_val());
         __ jcc(Assembler::equal, done);
         __ membar(Assembler::Membar_mask_bits(Assembler::StoreLoad));
         __ cmpb(Address(card_addr, 0), (int)CardTableModRefBS::dirty_card_val());
         __ jcc(Assembler::equal, done);
         // storing region crossing non-NULL, card is clean.
         // dirty card and log.
         __ movb(Address(card_addr, 0), (int)CardTableModRefBS::dirty_card_val());
         __ cmpl(queue_index, 0);
         __ jcc(Assembler::equal, runtime);
         __ subl(queue_index, wordSize);
         const Register buffer_addr = rbx;
         __ push(rbx);
         __ movptr(buffer_addr, buffer);
 #ifdef _LP64
         __ movslq(rscratch1, queue_index);
         __ addptr(buffer_addr, rscratch1);
 #else
         __ addptr(buffer_addr, queue_index);
 #endif
         __ movptr(Address(buffer_addr, 0), card_addr);
         __ pop(rbx);
         __ jmp(done);
         __ bind(runtime);
         __ push(rdx);
         save_live_registers(sasm, 3);
         __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_post), card_addr, thread);
         restore_live_registers(sasm);
         __ pop(rdx);
         __ bind(done);
         __ pop(rcx);
         __ pop(rax);
       }
       break;
 #endif // INCLUDE_ALL_GCS
     case predicate_failed_trap_id:
       {
         StubFrame f(sasm, "predicate_failed_trap", dont_gc_arguments);
         OopMap* map = save_live_registers(sasm, 1);
         int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap));
         oop_maps = new OopMapSet();
         oop_maps->add_gc_map(call_offset, map);
         restore_live_registers(sasm);
         __ leave();
         DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
         assert(deopt_blob != NULL, "deoptimization blob must have been created");
         __ jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
       }
       break;
     default:
       { StubFrame f(sasm, "unimplemented entry", dont_gc_arguments);
         __ movptr(rax, (int)id);
         __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), rax);
         __ should_not_reach_here();
       }
       break;
   }
   return oop_maps;
 }
 #undef __
 const char *Runtime1::pd_name_for_address(address entry) {
   return "<unknown function>";
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/x86/vm/c1_Runtime1_x86.cpp@8c95980d0b66 (annotated)

src/cpu/x86/vm/c1_Runtime1_x86.cpp