1 /*
   2  * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "c1/c1_Defs.hpp"
  27 #include "c1/c1_MacroAssembler.hpp"
  28 #include "c1/c1_Runtime1.hpp"
  29 #include "ci/ciUtilities.hpp"
  30 #include "gc/shared/cardTable.hpp"
  31 #include "gc/shared/cardTableModRefBS.hpp"
  32 #include "interpreter/interpreter.hpp"
  33 #include "nativeInst_sparc.hpp"
  34 #include "oops/compiledICHolder.hpp"
  35 #include "oops/oop.inline.hpp"
  36 #include "prims/jvmtiExport.hpp"
  37 #include "runtime/sharedRuntime.hpp"
  38 #include "runtime/signature.hpp"
  39 #include "runtime/vframeArray.hpp"
  40 #include "utilities/macros.hpp"
  41 #include "utilities/align.hpp"
  42 #include "vmreg_sparc.inline.hpp"
  43 #if INCLUDE_ALL_GCS
  44 #include "gc/g1/g1CardTable.hpp"
  45 #include "gc/g1/g1SATBCardTableModRefBS.hpp"
  46 #endif
  47 
  48 // Implementation of StubAssembler
  49 
  50 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry_point, int number_of_arguments) {
  51   // for sparc changing the number of arguments doesn't change
  52   // anything about the frame size so we'll always lie and claim that
  53   // we are only passing 1 argument.
  54   set_num_rt_args(1);
  55 
  56   assert_not_delayed();
  57   // bang stack before going to runtime
  58   set(-os::vm_page_size() + STACK_BIAS, G3_scratch);
  59   st(G0, SP, G3_scratch);
  60 
  61   // debugging support
  62   assert(number_of_arguments >= 0   , "cannot have negative number of arguments");
  63 
  64   set_last_Java_frame(SP, noreg);
  65   if (VerifyThread)  mov(G2_thread, O0); // about to be smashed; pass early
  66   save_thread(L7_thread_cache);
  67   // do the call
  68   call(entry_point, relocInfo::runtime_call_type);
  69   if (!VerifyThread) {
  70     delayed()->mov(G2_thread, O0);  // pass thread as first argument
  71   } else {
  72     delayed()->nop();             // (thread already passed)
  73   }
  74   int call_offset = offset();  // offset of return address
  75   restore_thread(L7_thread_cache);
  76   reset_last_Java_frame();
  77 
  78   // check for pending exceptions
  79   { Label L;
  80     Address exception_addr(G2_thread, Thread::pending_exception_offset());
  81     ld_ptr(exception_addr, Gtemp);
  82     br_null_short(Gtemp, pt, L);
  83     Address vm_result_addr(G2_thread, JavaThread::vm_result_offset());
  84     st_ptr(G0, vm_result_addr);
  85     Address vm_result_addr_2(G2_thread, JavaThread::vm_result_2_offset());
  86     st_ptr(G0, vm_result_addr_2);
  87 
  88     if (frame_size() == no_frame_size) {
  89       // we use O7 linkage so that forward_exception_entry has the issuing PC
  90       call(StubRoutines::forward_exception_entry(), relocInfo::runtime_call_type);
  91       delayed()->restore();
  92     } else if (_stub_id == Runtime1::forward_exception_id) {
  93       should_not_reach_here();
  94     } else {
  95       AddressLiteral exc(Runtime1::entry_for(Runtime1::forward_exception_id));
  96       jump_to(exc, G4);
  97       delayed()->nop();
  98     }
  99     bind(L);
 100   }
 101 
 102   // get oop result if there is one and reset the value in the thread
 103   if (oop_result1->is_valid()) {                    // get oop result if there is one and reset it in the thread
 104     get_vm_result  (oop_result1);
 105   } else {
 106     // be a little paranoid and clear the result
 107     Address vm_result_addr(G2_thread, JavaThread::vm_result_offset());
 108     st_ptr(G0, vm_result_addr);
 109   }
 110 
 111   // get second result if there is one and reset the value in the thread
 112   if (metadata_result->is_valid()) {
 113     get_vm_result_2  (metadata_result);
 114   } else {
 115     // be a little paranoid and clear the result
 116     Address vm_result_addr_2(G2_thread, JavaThread::vm_result_2_offset());
 117     st_ptr(G0, vm_result_addr_2);
 118   }
 119 
 120   return call_offset;
 121 }
 122 
 123 
 124 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) {
 125   // O0 is reserved for the thread
 126   mov(arg1, O1);
 127   return call_RT(oop_result1, metadata_result, entry, 1);
 128 }
 129 
 130 
 131 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) {
 132   // O0 is reserved for the thread
 133   mov(arg1, O1);
 134   mov(arg2, O2); assert(arg2 != O1, "smashed argument");
 135   return call_RT(oop_result1, metadata_result, entry, 2);
 136 }
 137 
 138 
 139 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) {
 140   // O0 is reserved for the thread
 141   mov(arg1, O1);
 142   mov(arg2, O2); assert(arg2 != O1,               "smashed argument");
 143   mov(arg3, O3); assert(arg3 != O1 && arg3 != O2, "smashed argument");
 144   return call_RT(oop_result1, metadata_result, entry, 3);
 145 }
 146 
 147 
 148 // Implementation of Runtime1
 149 
 150 #define __ sasm->
 151 
 152 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs];
 153 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs];
 154 static int reg_save_size_in_words;
 155 static int frame_size_in_bytes = -1;
 156 
 157 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) {
 158   assert(frame_size_in_bytes == __ total_frame_size_in_bytes(reg_save_size_in_words),
 159          "mismatch in calculation");
 160   sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
 161   int frame_size_in_slots = frame_size_in_bytes / sizeof(jint);
 162   OopMap* oop_map = new OopMap(frame_size_in_slots, 0);
 163 
 164   int i;
 165   for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
 166     Register r = as_Register(i);
 167     if (r == G1 || r == G3 || r == G4 || r == G5) {
 168       int sp_offset = cpu_reg_save_offsets[i];
 169       oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset),
 170                                 r->as_VMReg());
 171     }
 172   }
 173 
 174   if (save_fpu_registers) {
 175     for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
 176       FloatRegister r = as_FloatRegister(i);
 177       int sp_offset = fpu_reg_save_offsets[i];
 178       oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset),
 179                                 r->as_VMReg());
 180     }
 181   }
 182   return oop_map;
 183 }
 184 
 185 static OopMap* save_live_registers(StubAssembler* sasm, bool save_fpu_registers = true) {
 186   assert(frame_size_in_bytes == __ total_frame_size_in_bytes(reg_save_size_in_words),
 187          "mismatch in calculation");
 188   __ save_frame_c1(frame_size_in_bytes);
 189 
 190   // Record volatile registers as callee-save values in an OopMap so their save locations will be
 191   // propagated to the caller frame's RegisterMap during StackFrameStream construction (needed for
 192   // deoptimization; see compiledVFrame::create_stack_value).  The caller's I, L and O registers
 193   // are saved in register windows - I's and L's in the caller's frame and O's in the stub frame
 194   // (as the stub's I's) when the runtime routine called by the stub creates its frame.
 195   // OopMap frame sizes are in c2 stack slot sizes (sizeof(jint))
 196 
 197   int i;
 198   for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
 199     Register r = as_Register(i);
 200     if (r == G1 || r == G3 || r == G4 || r == G5) {
 201       int sp_offset = cpu_reg_save_offsets[i];
 202       __ st_ptr(r, SP, (sp_offset * BytesPerWord) + STACK_BIAS);
 203     }
 204   }
 205 
 206   if (save_fpu_registers) {
 207     for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
 208       FloatRegister r = as_FloatRegister(i);
 209       int sp_offset = fpu_reg_save_offsets[i];
 210       __ stf(FloatRegisterImpl::S, r, SP, (sp_offset * BytesPerWord) + STACK_BIAS);
 211     }
 212   }
 213 
 214   return generate_oop_map(sasm, save_fpu_registers);
 215 }
 216 
 217 static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) {
 218   for (int i = 0; i < FrameMap::nof_cpu_regs; i++) {
 219     Register r = as_Register(i);
 220     if (r == G1 || r == G3 || r == G4 || r == G5) {
 221       __ ld_ptr(SP, (cpu_reg_save_offsets[i] * BytesPerWord) + STACK_BIAS, r);
 222     }
 223   }
 224 
 225   if (restore_fpu_registers) {
 226     for (int i = 0; i < FrameMap::nof_fpu_regs; i++) {
 227       FloatRegister r = as_FloatRegister(i);
 228       __ ldf(FloatRegisterImpl::S, SP, (fpu_reg_save_offsets[i] * BytesPerWord) + STACK_BIAS, r);
 229     }
 230   }
 231 }
 232 
 233 
 234 void Runtime1::initialize_pd() {
 235   // compute word offsets from SP at which live (non-windowed) registers are captured by stub routines
 236   //
 237   // A stub routine will have a frame that is at least large enough to hold
 238   // a register window save area (obviously) and the volatile g registers
 239   // and floating registers. A user of save_live_registers can have a frame
 240   // that has more scratch area in it (although typically they will use L-regs).
 241   // in that case the frame will look like this (stack growing down)
 242   //
 243   // FP -> |             |
 244   //       | scratch mem |
 245   //       |   "      "  |
 246   //       --------------
 247   //       | float regs  |
 248   //       |   "    "    |
 249   //       ---------------
 250   //       | G regs      |
 251   //       | "  "        |
 252   //       ---------------
 253   //       | abi reg.    |
 254   //       | window save |
 255   //       | area        |
 256   // SP -> ---------------
 257   //
 258   int i;
 259   int sp_offset = align_up((int)frame::register_save_words, 2); //  start doubleword aligned
 260 
 261   // only G int registers are saved explicitly; others are found in register windows
 262   for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
 263     Register r = as_Register(i);
 264     if (r == G1 || r == G3 || r == G4 || r == G5) {
 265       cpu_reg_save_offsets[i] = sp_offset;
 266       sp_offset++;
 267     }
 268   }
 269 
 270   // all float registers are saved explicitly
 271   assert(FrameMap::nof_fpu_regs == 32, "double registers not handled here");
 272   for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
 273     fpu_reg_save_offsets[i] = sp_offset;
 274     sp_offset++;
 275   }
 276   reg_save_size_in_words = sp_offset - frame::memory_parameter_word_sp_offset;
 277   // this should match assembler::total_frame_size_in_bytes, which
 278   // isn't callable from this context.  It's checked by an assert when
 279   // it's used though.
 280   frame_size_in_bytes = align_up(sp_offset * wordSize, 8);
 281 }
 282 
 283 
 284 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
 285   // make a frame and preserve the caller's caller-save registers
 286   OopMap* oop_map = save_live_registers(sasm);
 287   int call_offset;
 288   if (!has_argument) {
 289     call_offset = __ call_RT(noreg, noreg, target);
 290   } else {
 291     call_offset = __ call_RT(noreg, noreg, target, G4);
 292   }
 293   OopMapSet* oop_maps = new OopMapSet();
 294   oop_maps->add_gc_map(call_offset, oop_map);
 295 
 296   __ should_not_reach_here();
 297   return oop_maps;
 298 }
 299 
 300 
 301 OopMapSet* Runtime1::generate_stub_call(StubAssembler* sasm, Register result, address target,
 302                                         Register arg1, Register arg2, Register arg3) {
 303   // make a frame and preserve the caller's caller-save registers
 304   OopMap* oop_map = save_live_registers(sasm);
 305 
 306   int call_offset;
 307   if (arg1 == noreg) {
 308     call_offset = __ call_RT(result, noreg, target);
 309   } else if (arg2 == noreg) {
 310     call_offset = __ call_RT(result, noreg, target, arg1);
 311   } else if (arg3 == noreg) {
 312     call_offset = __ call_RT(result, noreg, target, arg1, arg2);
 313   } else {
 314     call_offset = __ call_RT(result, noreg, target, arg1, arg2, arg3);
 315   }
 316   OopMapSet* oop_maps = NULL;
 317 
 318   oop_maps = new OopMapSet();
 319   oop_maps->add_gc_map(call_offset, oop_map);
 320   restore_live_registers(sasm);
 321 
 322   __ ret();
 323   __ delayed()->restore();
 324 
 325   return oop_maps;
 326 }
 327 
 328 
 329 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
 330   // make a frame and preserve the caller's caller-save registers
 331   OopMap* oop_map = save_live_registers(sasm);
 332 
 333   // call the runtime patching routine, returns non-zero if nmethod got deopted.
 334   int call_offset = __ call_RT(noreg, noreg, target);
 335   OopMapSet* oop_maps = new OopMapSet();
 336   oop_maps->add_gc_map(call_offset, oop_map);
 337 
 338   // re-execute the patched instruction or, if the nmethod was deoptmized, return to the
 339   // deoptimization handler entry that will cause re-execution of the current bytecode
 340   DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
 341   assert(deopt_blob != NULL, "deoptimization blob must have been created");
 342 
 343   Label no_deopt;
 344   __ br_null_short(O0, Assembler::pt, no_deopt);
 345 
 346   // return to the deoptimization handler entry for unpacking and rexecute
 347   // if we simply returned the we'd deopt as if any call we patched had just
 348   // returned.
 349 
 350   restore_live_registers(sasm);
 351 
 352   AddressLiteral dest(deopt_blob->unpack_with_reexecution());
 353   __ jump_to(dest, O0);
 354   __ delayed()->restore();
 355 
 356   __ bind(no_deopt);
 357   restore_live_registers(sasm);
 358   __ ret();
 359   __ delayed()->restore();
 360 
 361   return oop_maps;
 362 }
 363 
 364 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
 365 
 366   OopMapSet* oop_maps = NULL;
 367   // for better readability
 368   const bool must_gc_arguments = true;
 369   const bool dont_gc_arguments = false;
 370 
 371   // stub code & info for the different stubs
 372   switch (id) {
 373     case forward_exception_id:
 374       {
 375         oop_maps = generate_handle_exception(id, sasm);
 376       }
 377       break;
 378 
 379     case new_instance_id:
 380     case fast_new_instance_id:
 381     case fast_new_instance_init_check_id:
 382       {
 383         Register G5_klass = G5; // Incoming
 384         Register O0_obj   = O0; // Outgoing
 385 
 386         if (id == new_instance_id) {
 387           __ set_info("new_instance", dont_gc_arguments);
 388         } else if (id == fast_new_instance_id) {
 389           __ set_info("fast new_instance", dont_gc_arguments);
 390         } else {
 391           assert(id == fast_new_instance_init_check_id, "bad StubID");
 392           __ set_info("fast new_instance init check", dont_gc_arguments);
 393         }
 394 
 395         if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) &&
 396             UseTLAB && Universe::heap()->supports_inline_contig_alloc()) {
 397           Label slow_path;
 398           Register G1_obj_size = G1;
 399           Register G3_t1 = G3;
 400           Register G4_t2 = G4;
 401           assert_different_registers(G5_klass, G1_obj_size, G3_t1, G4_t2);
 402 
 403           // Push a frame since we may do dtrace notification for the
 404           // allocation which requires calling out and we don't want
 405           // to stomp the real return address.
 406           __ save_frame(0);
 407 
 408           if (id == fast_new_instance_init_check_id) {
 409             // make sure the klass is initialized
 410             __ ldub(G5_klass, in_bytes(InstanceKlass::init_state_offset()), G3_t1);
 411             __ cmp(G3_t1, InstanceKlass::fully_initialized);
 412             __ br(Assembler::notEqual, false, Assembler::pn, slow_path);
 413             __ delayed()->nop();
 414           }
 415 #ifdef ASSERT
 416           // assert object can be fast path allocated
 417           {
 418             Label ok, not_ok;
 419           __ ld(G5_klass, in_bytes(Klass::layout_helper_offset()), G1_obj_size);
 420           // make sure it's an instance (LH > 0)
 421           __ cmp_and_br_short(G1_obj_size, 0, Assembler::lessEqual, Assembler::pn, not_ok);
 422           __ btst(Klass::_lh_instance_slow_path_bit, G1_obj_size);
 423           __ br(Assembler::zero, false, Assembler::pn, ok);
 424           __ delayed()->nop();
 425           __ bind(not_ok);
 426           __ stop("assert(can be fast path allocated)");
 427           __ should_not_reach_here();
 428           __ bind(ok);
 429           }
 430 #endif // ASSERT
 431 
 432           // If we got here then the TLAB allocation failed, so try allocating directly from eden.
 433           // get the instance size
 434           __ ld(G5_klass, in_bytes(Klass::layout_helper_offset()), G1_obj_size);
 435           __ eden_allocate(O0_obj, G1_obj_size, 0, G3_t1, G4_t2, slow_path);
 436           __ incr_allocated_bytes(G1_obj_size, G3_t1, G4_t2);
 437 
 438           __ initialize_object(O0_obj, G5_klass, G1_obj_size, 0, G3_t1, G4_t2, /* is_tlab_allocated */ false);
 439           __ verify_oop(O0_obj);
 440           __ mov(O0, I0);
 441           __ ret();
 442           __ delayed()->restore();
 443 
 444           __ bind(slow_path);
 445 
 446           // pop this frame so generate_stub_call can push it's own
 447           __ restore();
 448         }
 449 
 450         oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_instance), G5_klass);
 451         // I0->O0: new instance
 452       }
 453 
 454       break;
 455 
 456     case counter_overflow_id:
 457         // G4 contains bci, G5 contains method
 458       oop_maps = generate_stub_call(sasm, noreg, CAST_FROM_FN_PTR(address, counter_overflow), G4, G5);
 459       break;
 460 
 461     case new_type_array_id:
 462     case new_object_array_id:
 463       {
 464         Register G5_klass = G5; // Incoming
 465         Register G4_length = G4; // Incoming
 466         Register O0_obj   = O0; // Outgoing
 467 
 468         Address klass_lh(G5_klass, Klass::layout_helper_offset());
 469         assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise");
 470         assert(Klass::_lh_header_size_mask == 0xFF, "bytewise");
 471         // Use this offset to pick out an individual byte of the layout_helper:
 472         const int klass_lh_header_size_offset = ((BytesPerInt - 1)  // 3 - 2 selects byte {0,1,0,0}
 473                                                  - Klass::_lh_header_size_shift / BitsPerByte);
 474 
 475         if (id == new_type_array_id) {
 476           __ set_info("new_type_array", dont_gc_arguments);
 477         } else {
 478           __ set_info("new_object_array", dont_gc_arguments);
 479         }
 480 
 481 #ifdef ASSERT
 482         // assert object type is really an array of the proper kind
 483         {
 484           Label ok;
 485           Register G3_t1 = G3;
 486           __ ld(klass_lh, G3_t1);
 487           __ sra(G3_t1, Klass::_lh_array_tag_shift, G3_t1);
 488           int tag = ((id == new_type_array_id)
 489                      ? Klass::_lh_array_tag_type_value
 490                      : Klass::_lh_array_tag_obj_value);
 491           __ cmp_and_brx_short(G3_t1, tag, Assembler::equal, Assembler::pt, ok);
 492           __ stop("assert(is an array klass)");
 493           __ should_not_reach_here();
 494           __ bind(ok);
 495         }
 496 #endif // ASSERT
 497 
 498         if (id == new_type_array_id) {
 499           oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_type_array), G5_klass, G4_length);
 500         } else {
 501           oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_object_array), G5_klass, G4_length);
 502         }
 503         // I0 -> O0: new array
 504       }
 505       break;
 506 
 507     case new_multi_array_id:
 508       { // O0: klass
 509         // O1: rank
 510         // O2: address of 1st dimension
 511         __ set_info("new_multi_array", dont_gc_arguments);
 512         oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_multi_array), I0, I1, I2);
 513         // I0 -> O0: new multi array
 514       }
 515       break;
 516 
 517     case register_finalizer_id:
 518       {
 519         __ set_info("register_finalizer", dont_gc_arguments);
 520 
 521         // load the klass and check the has finalizer flag
 522         Label register_finalizer;
 523         Register t = O1;
 524         __ load_klass(O0, t);
 525         __ ld(t, in_bytes(Klass::access_flags_offset()), t);
 526         __ set(JVM_ACC_HAS_FINALIZER, G3);
 527         __ andcc(G3, t, G0);
 528         __ br(Assembler::notZero, false, Assembler::pt, register_finalizer);
 529         __ delayed()->nop();
 530 
 531         // do a leaf return
 532         __ retl();
 533         __ delayed()->nop();
 534 
 535         __ bind(register_finalizer);
 536         OopMap* oop_map = save_live_registers(sasm);
 537         int call_offset = __ call_RT(noreg, noreg,
 538                                      CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), I0);
 539         oop_maps = new OopMapSet();
 540         oop_maps->add_gc_map(call_offset, oop_map);
 541 
 542         // Now restore all the live registers
 543         restore_live_registers(sasm);
 544 
 545         __ ret();
 546         __ delayed()->restore();
 547       }
 548       break;
 549 
 550     case throw_range_check_failed_id:
 551       { __ set_info("range_check_failed", dont_gc_arguments); // arguments will be discarded
 552         // G4: index
 553         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true);
 554       }
 555       break;
 556 
 557     case throw_index_exception_id:
 558       { __ set_info("index_range_check_failed", dont_gc_arguments); // arguments will be discarded
 559         // G4: index
 560         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
 561       }
 562       break;
 563 
 564     case throw_div0_exception_id:
 565       { __ set_info("throw_div0_exception", dont_gc_arguments);
 566         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
 567       }
 568       break;
 569 
 570     case throw_null_pointer_exception_id:
 571       { __ set_info("throw_null_pointer_exception", dont_gc_arguments);
 572         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
 573       }
 574       break;
 575 
 576     case handle_exception_id:
 577       { __ set_info("handle_exception", dont_gc_arguments);
 578         oop_maps = generate_handle_exception(id, sasm);
 579       }
 580       break;
 581 
 582     case handle_exception_from_callee_id:
 583       { __ set_info("handle_exception_from_callee", dont_gc_arguments);
 584         oop_maps = generate_handle_exception(id, sasm);
 585       }
 586       break;
 587 
 588     case unwind_exception_id:
 589       {
 590         // O0: exception
 591         // I7: address of call to this method
 592 
 593         __ set_info("unwind_exception", dont_gc_arguments);
 594         __ mov(Oexception, Oexception->after_save());
 595         __ add(I7, frame::pc_return_offset, Oissuing_pc->after_save());
 596 
 597         __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address),
 598                         G2_thread, Oissuing_pc->after_save());
 599         __ verify_not_null_oop(Oexception->after_save());
 600 
 601         // Restore SP from L7 if the exception PC is a method handle call site.
 602         __ mov(O0, G5);  // Save the target address.
 603         __ lduw(Address(G2_thread, JavaThread::is_method_handle_return_offset()), L0);
 604         __ tst(L0);  // Condition codes are preserved over the restore.
 605         __ restore();
 606 
 607         __ jmp(G5, 0);
 608         __ delayed()->movcc(Assembler::notZero, false, Assembler::icc, L7_mh_SP_save, SP);  // Restore SP if required.
 609       }
 610       break;
 611 
 612     case throw_array_store_exception_id:
 613       {
 614         __ set_info("throw_array_store_exception", dont_gc_arguments);
 615         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true);
 616       }
 617       break;
 618 
 619     case throw_class_cast_exception_id:
 620       {
 621         // G4: object
 622         __ set_info("throw_class_cast_exception", dont_gc_arguments);
 623         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
 624       }
 625       break;
 626 
 627     case throw_incompatible_class_change_error_id:
 628       {
 629         __ set_info("throw_incompatible_class_cast_exception", dont_gc_arguments);
 630         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
 631       }
 632       break;
 633 
 634     case slow_subtype_check_id:
 635       { // Support for uint StubRoutine::partial_subtype_check( Klass sub, Klass super );
 636         // Arguments :
 637         //
 638         //      ret  : G3
 639         //      sub  : G3, argument, destroyed
 640         //      super: G1, argument, not changed
 641         //      raddr: O7, blown by call
 642         Label miss;
 643 
 644         __ save_frame(0);               // Blow no registers!
 645 
 646         __ check_klass_subtype_slow_path(G3, G1, L0, L1, L2, L4, NULL, &miss);
 647 
 648         __ mov(1, G3);
 649         __ ret();                       // Result in G5 is 'true'
 650         __ delayed()->restore();        // free copy or add can go here
 651 
 652         __ bind(miss);
 653         __ mov(0, G3);
 654         __ ret();                       // Result in G5 is 'false'
 655         __ delayed()->restore();        // free copy or add can go here
 656       }
 657 
 658     case monitorenter_nofpu_id:
 659     case monitorenter_id:
 660       { // G4: object
 661         // G5: lock address
 662         __ set_info("monitorenter", dont_gc_arguments);
 663 
 664         int save_fpu_registers = (id == monitorenter_id);
 665         // make a frame and preserve the caller's caller-save registers
 666         OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
 667 
 668         int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), G4, G5);
 669 
 670         oop_maps = new OopMapSet();
 671         oop_maps->add_gc_map(call_offset, oop_map);
 672         restore_live_registers(sasm, save_fpu_registers);
 673 
 674         __ ret();
 675         __ delayed()->restore();
 676       }
 677       break;
 678 
 679     case monitorexit_nofpu_id:
 680     case monitorexit_id:
 681       { // G4: lock address
 682         // note: really a leaf routine but must setup last java sp
 683         //       => use call_RT for now (speed can be improved by
 684         //       doing last java sp setup manually)
 685         __ set_info("monitorexit", dont_gc_arguments);
 686 
 687         int save_fpu_registers = (id == monitorexit_id);
 688         // make a frame and preserve the caller's caller-save registers
 689         OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
 690 
 691         int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), G4);
 692 
 693         oop_maps = new OopMapSet();
 694         oop_maps->add_gc_map(call_offset, oop_map);
 695         restore_live_registers(sasm, save_fpu_registers);
 696 
 697         __ ret();
 698         __ delayed()->restore();
 699       }
 700       break;
 701 
 702     case deoptimize_id:
 703       {
 704         __ set_info("deoptimize", dont_gc_arguments);
 705         OopMap* oop_map = save_live_registers(sasm);
 706         int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, deoptimize), G4);
 707         oop_maps = new OopMapSet();
 708         oop_maps->add_gc_map(call_offset, oop_map);
 709         restore_live_registers(sasm);
 710         DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
 711         assert(deopt_blob != NULL, "deoptimization blob must have been created");
 712         AddressLiteral dest(deopt_blob->unpack_with_reexecution());
 713         __ jump_to(dest, O0);
 714         __ delayed()->restore();
 715       }
 716       break;
 717 
 718     case access_field_patching_id:
 719       { __ set_info("access_field_patching", dont_gc_arguments);
 720         oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
 721       }
 722       break;
 723 
 724     case load_klass_patching_id:
 725       { __ set_info("load_klass_patching", dont_gc_arguments);
 726         oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
 727       }
 728       break;
 729 
 730     case load_mirror_patching_id:
 731       { __ set_info("load_mirror_patching", dont_gc_arguments);
 732         oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
 733       }
 734       break;
 735 
 736     case load_appendix_patching_id:
 737       { __ set_info("load_appendix_patching", dont_gc_arguments);
 738         oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
 739       }
 740       break;
 741 
 742     case dtrace_object_alloc_id:
 743       { // O0: object
 744         __ set_info("dtrace_object_alloc", dont_gc_arguments);
 745         // we can't gc here so skip the oopmap but make sure that all
 746         // the live registers get saved.
 747         save_live_registers(sasm);
 748 
 749         __ save_thread(L7_thread_cache);
 750         __ call(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc),
 751                 relocInfo::runtime_call_type);
 752         __ delayed()->mov(I0, O0);
 753         __ restore_thread(L7_thread_cache);
 754 
 755         restore_live_registers(sasm);
 756         __ ret();
 757         __ delayed()->restore();
 758       }
 759       break;
 760 
 761 #if INCLUDE_ALL_GCS
 762     case g1_pre_barrier_slow_id:
 763       { // G4: previous value of memory
 764         BarrierSet* bs = Universe::heap()->barrier_set();
 765         if (bs->kind() != BarrierSet::G1SATBCTLogging) {
 766           __ save_frame(0);
 767           __ set((int)id, O1);
 768           __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), I0);
 769           __ should_not_reach_here();
 770           break;
 771         }
 772 
 773         __ set_info("g1_pre_barrier_slow_id", dont_gc_arguments);
 774 
 775         Register pre_val = G4;
 776         Register tmp  = G1_scratch;
 777         Register tmp2 = G3_scratch;
 778 
 779         Label refill, restart;
 780         int satb_q_active_byte_offset =
 781           in_bytes(JavaThread::satb_mark_queue_offset() +
 782                    SATBMarkQueue::byte_offset_of_active());
 783         int satb_q_index_byte_offset =
 784           in_bytes(JavaThread::satb_mark_queue_offset() +
 785                    SATBMarkQueue::byte_offset_of_index());
 786         int satb_q_buf_byte_offset =
 787           in_bytes(JavaThread::satb_mark_queue_offset() +
 788                    SATBMarkQueue::byte_offset_of_buf());
 789 
 790         // Is marking still active?
 791         if (in_bytes(SATBMarkQueue::byte_width_of_active()) == 4) {
 792           __ ld(G2_thread, satb_q_active_byte_offset, tmp);
 793         } else {
 794           assert(in_bytes(SATBMarkQueue::byte_width_of_active()) == 1, "Assumption");
 795           __ ldsb(G2_thread, satb_q_active_byte_offset, tmp);
 796         }
 797         __ cmp_and_br_short(tmp, G0, Assembler::notEqual, Assembler::pt, restart);
 798         __ retl();
 799         __ delayed()->nop();
 800 
 801         __ bind(restart);
 802         // Load the index into the SATB buffer. SATBMarkQueue::_index is a
 803         // size_t so ld_ptr is appropriate
 804         __ ld_ptr(G2_thread, satb_q_index_byte_offset, tmp);
 805 
 806         // index == 0?
 807         __ cmp_and_brx_short(tmp, G0, Assembler::equal, Assembler::pn, refill);
 808 
 809         __ ld_ptr(G2_thread, satb_q_buf_byte_offset, tmp2);
 810         __ sub(tmp, oopSize, tmp);
 811 
 812         __ st_ptr(pre_val, tmp2, tmp);  // [_buf + index] := <address_of_card>
 813         // Use return-from-leaf
 814         __ retl();
 815         __ delayed()->st_ptr(tmp, G2_thread, satb_q_index_byte_offset);
 816 
 817         __ bind(refill);
 818 
 819         save_live_registers(sasm);
 820 
 821         __ call_VM_leaf(L7_thread_cache,
 822                         CAST_FROM_FN_PTR(address,
 823                                          SATBMarkQueueSet::handle_zero_index_for_thread),
 824                                          G2_thread);
 825 
 826         restore_live_registers(sasm);
 827 
 828         __ br(Assembler::always, /*annul*/false, Assembler::pt, restart);
 829         __ delayed()->restore();
 830       }
 831       break;
 832 
 833     case g1_post_barrier_slow_id:
 834       {
 835         BarrierSet* bs = Universe::heap()->barrier_set();
 836         if (bs->kind() != BarrierSet::G1SATBCTLogging) {
 837           __ save_frame(0);
 838           __ set((int)id, O1);
 839           __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), I0);
 840           __ should_not_reach_here();
 841           break;
 842         }
 843 
 844         __ set_info("g1_post_barrier_slow_id", dont_gc_arguments);
 845 
 846         Register addr = G4;
 847         Register cardtable = G5;
 848         Register tmp  = G1_scratch;
 849         Register tmp2 = G3_scratch;
 850         jbyte* byte_map_base = ci_card_table_address();
 851 
 852         Label not_already_dirty, restart, refill, young_card;
 853 
 854         __ srlx(addr, CardTable::card_shift, addr);
 855 
 856         AddressLiteral rs(byte_map_base);
 857         __ set(rs, cardtable);         // cardtable := <card table base>
 858         __ ldub(addr, cardtable, tmp); // tmp := [addr + cardtable]
 859 
 860         __ cmp_and_br_short(tmp, G1CardTable::g1_young_card_val(), Assembler::equal, Assembler::pt, young_card);
 861 
 862         __ membar(Assembler::Membar_mask_bits(Assembler::StoreLoad));
 863         __ ldub(addr, cardtable, tmp); // tmp := [addr + cardtable]
 864 
 865         assert(CardTable::dirty_card_val() == 0, "otherwise check this code");
 866         __ cmp_and_br_short(tmp, G0, Assembler::notEqual, Assembler::pt, not_already_dirty);
 867 
 868         __ bind(young_card);
 869         // We didn't take the branch, so we're already dirty: return.
 870         // Use return-from-leaf
 871         __ retl();
 872         __ delayed()->nop();
 873 
 874         // Not dirty.
 875         __ bind(not_already_dirty);
 876 
 877         // Get cardtable + tmp into a reg by itself
 878         __ add(addr, cardtable, tmp2);
 879 
 880         // First, dirty it.
 881         __ stb(G0, tmp2, 0);  // [cardPtr] := 0  (i.e., dirty).
 882 
 883         Register tmp3 = cardtable;
 884         Register tmp4 = tmp;
 885 
 886         // these registers are now dead
 887         addr = cardtable = tmp = noreg;
 888 
 889         int dirty_card_q_index_byte_offset =
 890           in_bytes(JavaThread::dirty_card_queue_offset() +
 891                    DirtyCardQueue::byte_offset_of_index());
 892         int dirty_card_q_buf_byte_offset =
 893           in_bytes(JavaThread::dirty_card_queue_offset() +
 894                    DirtyCardQueue::byte_offset_of_buf());
 895 
 896         __ bind(restart);
 897 
 898         // Get the index into the update buffer. DirtyCardQueue::_index is
 899         // a size_t so ld_ptr is appropriate here.
 900         __ ld_ptr(G2_thread, dirty_card_q_index_byte_offset, tmp3);
 901 
 902         // index == 0?
 903         __ cmp_and_brx_short(tmp3, G0, Assembler::equal,  Assembler::pn, refill);
 904 
 905         __ ld_ptr(G2_thread, dirty_card_q_buf_byte_offset, tmp4);
 906         __ sub(tmp3, oopSize, tmp3);
 907 
 908         __ st_ptr(tmp2, tmp4, tmp3);  // [_buf + index] := <address_of_card>
 909         // Use return-from-leaf
 910         __ retl();
 911         __ delayed()->st_ptr(tmp3, G2_thread, dirty_card_q_index_byte_offset);
 912 
 913         __ bind(refill);
 914 
 915         save_live_registers(sasm);
 916 
 917         __ call_VM_leaf(L7_thread_cache,
 918                         CAST_FROM_FN_PTR(address,
 919                                          DirtyCardQueueSet::handle_zero_index_for_thread),
 920                                          G2_thread);
 921 
 922         restore_live_registers(sasm);
 923 
 924         __ br(Assembler::always, /*annul*/false, Assembler::pt, restart);
 925         __ delayed()->restore();
 926       }
 927       break;
 928 #endif // INCLUDE_ALL_GCS
 929 
 930     case predicate_failed_trap_id:
 931       {
 932         __ set_info("predicate_failed_trap", dont_gc_arguments);
 933         OopMap* oop_map = save_live_registers(sasm);
 934 
 935         int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap));
 936 
 937         oop_maps = new OopMapSet();
 938         oop_maps->add_gc_map(call_offset, oop_map);
 939 
 940         DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
 941         assert(deopt_blob != NULL, "deoptimization blob must have been created");
 942         restore_live_registers(sasm);
 943 
 944         AddressLiteral dest(deopt_blob->unpack_with_reexecution());
 945         __ jump_to(dest, O0);
 946         __ delayed()->restore();
 947       }
 948       break;
 949 
 950     default:
 951       { __ set_info("unimplemented entry", dont_gc_arguments);
 952         __ save_frame(0);
 953         __ set((int)id, O1);
 954         __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), O1);
 955         __ should_not_reach_here();
 956       }
 957       break;
 958   }
 959   return oop_maps;
 960 }
 961 
 962 
 963 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler* sasm) {
 964   __ block_comment("generate_handle_exception");
 965 
 966   // Save registers, if required.
 967   OopMapSet* oop_maps = new OopMapSet();
 968   OopMap* oop_map = NULL;
 969   switch (id) {
 970   case forward_exception_id:
 971     // We're handling an exception in the context of a compiled frame.
 972     // The registers have been saved in the standard places.  Perform
 973     // an exception lookup in the caller and dispatch to the handler
 974     // if found.  Otherwise unwind and dispatch to the callers
 975     // exception handler.
 976      oop_map = generate_oop_map(sasm, true);
 977 
 978      // transfer the pending exception to the exception_oop
 979      __ ld_ptr(G2_thread, in_bytes(JavaThread::pending_exception_offset()), Oexception);
 980      __ ld_ptr(Oexception, 0, G0);
 981      __ st_ptr(G0, G2_thread, in_bytes(JavaThread::pending_exception_offset()));
 982      __ add(I7, frame::pc_return_offset, Oissuing_pc);
 983     break;
 984   case handle_exception_id:
 985     // At this point all registers MAY be live.
 986     oop_map = save_live_registers(sasm);
 987     __ mov(Oexception->after_save(),  Oexception);
 988     __ mov(Oissuing_pc->after_save(), Oissuing_pc);
 989     break;
 990   case handle_exception_from_callee_id:
 991     // At this point all registers except exception oop (Oexception)
 992     // and exception pc (Oissuing_pc) are dead.
 993     oop_map = new OopMap(frame_size_in_bytes / sizeof(jint), 0);
 994     sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
 995     __ save_frame_c1(frame_size_in_bytes);
 996     __ mov(Oexception->after_save(),  Oexception);
 997     __ mov(Oissuing_pc->after_save(), Oissuing_pc);
 998     break;
 999   default:  ShouldNotReachHere();
1000   }
1001 
1002   __ verify_not_null_oop(Oexception);
1003 
1004 #ifdef ASSERT
1005   // check that fields in JavaThread for exception oop and issuing pc are
1006   // empty before writing to them
1007   Label oop_empty;
1008   Register scratch = I7;  // We can use I7 here because it's overwritten later anyway.
1009   __ ld_ptr(Address(G2_thread, JavaThread::exception_oop_offset()), scratch);
1010   __ br_null(scratch, false, Assembler::pt, oop_empty);
1011   __ delayed()->nop();
1012   __ stop("exception oop already set");
1013   __ bind(oop_empty);
1014 
1015   Label pc_empty;
1016   __ ld_ptr(Address(G2_thread, JavaThread::exception_pc_offset()), scratch);
1017   __ br_null(scratch, false, Assembler::pt, pc_empty);
1018   __ delayed()->nop();
1019   __ stop("exception pc already set");
1020   __ bind(pc_empty);
1021 #endif
1022 
1023   // save the exception and issuing pc in the thread
1024   __ st_ptr(Oexception,  G2_thread, in_bytes(JavaThread::exception_oop_offset()));
1025   __ st_ptr(Oissuing_pc, G2_thread, in_bytes(JavaThread::exception_pc_offset()));
1026 
1027   // use the throwing pc as the return address to lookup (has bci & oop map)
1028   __ mov(Oissuing_pc, I7);
1029   __ sub(I7, frame::pc_return_offset, I7);
1030   int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
1031   oop_maps->add_gc_map(call_offset, oop_map);
1032 
1033   // Note: if nmethod has been deoptimized then regardless of
1034   // whether it had a handler or not we will deoptimize
1035   // by entering the deopt blob with a pending exception.
1036 
1037   // Restore the registers that were saved at the beginning, remove
1038   // the frame and jump to the exception handler.
1039   switch (id) {
1040   case forward_exception_id:
1041   case handle_exception_id:
1042     restore_live_registers(sasm);
1043     __ jmp(O0, 0);
1044     __ delayed()->restore();
1045     break;
1046   case handle_exception_from_callee_id:
1047     // Restore SP from L7 if the exception PC is a method handle call site.
1048     __ mov(O0, G5);  // Save the target address.
1049     __ lduw(Address(G2_thread, JavaThread::is_method_handle_return_offset()), L0);
1050     __ tst(L0);  // Condition codes are preserved over the restore.
1051     __ restore();
1052 
1053     __ jmp(G5, 0);  // jump to the exception handler
1054     __ delayed()->movcc(Assembler::notZero, false, Assembler::icc, L7_mh_SP_save, SP);  // Restore SP if required.
1055     break;
1056   default:  ShouldNotReachHere();
1057   }
1058 
1059   return oop_maps;
1060 }
1061 
1062 
1063 #undef __
1064 
1065 const char *Runtime1::pd_name_for_address(address entry) {
1066   return "<unknown function>";
1067 }