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/cardTableBarrierSet.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 
  44 // Implementation of StubAssembler
  45 
  46 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry_point, int number_of_arguments) {
  47   // for sparc changing the number of arguments doesn't change
  48   // anything about the frame size so we'll always lie and claim that
  49   // we are only passing 1 argument.
  50   set_num_rt_args(1);
  51 
  52   assert_not_delayed();
  53   // bang stack before going to runtime
  54   set(-os::vm_page_size() + STACK_BIAS, G3_scratch);
  55   st(G0, SP, G3_scratch);
  56 
  57   // debugging support
  58   assert(number_of_arguments >= 0   , "cannot have negative number of arguments");
  59 
  60   set_last_Java_frame(SP, noreg);
  61   if (VerifyThread)  mov(G2_thread, O0); // about to be smashed; pass early
  62   save_thread(L7_thread_cache);
  63   // do the call
  64   call(entry_point, relocInfo::runtime_call_type);
  65   if (!VerifyThread) {
  66     delayed()->mov(G2_thread, O0);  // pass thread as first argument
  67   } else {
  68     delayed()->nop();             // (thread already passed)
  69   }
  70   int call_offset = offset();  // offset of return address
  71   restore_thread(L7_thread_cache);
  72   reset_last_Java_frame();
  73 
  74   // check for pending exceptions
  75   { Label L;
  76     Address exception_addr(G2_thread, Thread::pending_exception_offset());
  77     ld_ptr(exception_addr, Gtemp);
  78     br_null_short(Gtemp, pt, L);
  79     Address vm_result_addr(G2_thread, JavaThread::vm_result_offset());
  80     st_ptr(G0, vm_result_addr);
  81     Address vm_result_addr_2(G2_thread, JavaThread::vm_result_2_offset());
  82     st_ptr(G0, vm_result_addr_2);
  83 
  84     if (frame_size() == no_frame_size) {
  85       // we use O7 linkage so that forward_exception_entry has the issuing PC
  86       call(StubRoutines::forward_exception_entry(), relocInfo::runtime_call_type);
  87       delayed()->restore();
  88     } else if (_stub_id == Runtime1::forward_exception_id) {
  89       should_not_reach_here();
  90     } else {
  91       AddressLiteral exc(Runtime1::entry_for(Runtime1::forward_exception_id));
  92       jump_to(exc, G4);
  93       delayed()->nop();
  94     }
  95     bind(L);
  96   }
  97 
  98   // get oop result if there is one and reset the value in the thread
  99   if (oop_result1->is_valid()) {                    // get oop result if there is one and reset it in the thread
 100     get_vm_result  (oop_result1);
 101   } else {
 102     // be a little paranoid and clear the result
 103     Address vm_result_addr(G2_thread, JavaThread::vm_result_offset());
 104     st_ptr(G0, vm_result_addr);
 105   }
 106 
 107   // get second result if there is one and reset the value in the thread
 108   if (metadata_result->is_valid()) {
 109     get_vm_result_2  (metadata_result);
 110   } else {
 111     // be a little paranoid and clear the result
 112     Address vm_result_addr_2(G2_thread, JavaThread::vm_result_2_offset());
 113     st_ptr(G0, vm_result_addr_2);
 114   }
 115 
 116   return call_offset;
 117 }
 118 
 119 
 120 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) {
 121   // O0 is reserved for the thread
 122   mov(arg1, O1);
 123   return call_RT(oop_result1, metadata_result, entry, 1);
 124 }
 125 
 126 
 127 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) {
 128   // O0 is reserved for the thread
 129   mov(arg1, O1);
 130   mov(arg2, O2); assert(arg2 != O1, "smashed argument");
 131   return call_RT(oop_result1, metadata_result, entry, 2);
 132 }
 133 
 134 
 135 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) {
 136   // O0 is reserved for the thread
 137   mov(arg1, O1);
 138   mov(arg2, O2); assert(arg2 != O1,               "smashed argument");
 139   mov(arg3, O3); assert(arg3 != O1 && arg3 != O2, "smashed argument");
 140   return call_RT(oop_result1, metadata_result, entry, 3);
 141 }
 142 
 143 void StubAssembler::prologue(const char* name, bool must_gc_arguments) {
 144   set_info(name, must_gc_arguments);
 145 }
 146 
 147 void StubAssembler::epilogue() {
 148   delayed()->restore();
 149 }
 150 
 151 // Implementation of Runtime1
 152 
 153 
 154 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs];
 155 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs];
 156 static int reg_save_size_in_words;
 157 static int frame_size_in_bytes = -1;
 158 
 159 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) {
 160   assert(frame_size_in_bytes == sasm->total_frame_size_in_bytes(reg_save_size_in_words),
 161          "mismatch in calculation");
 162   sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
 163   int frame_size_in_slots = frame_size_in_bytes / sizeof(jint);
 164   OopMap* oop_map = new OopMap(frame_size_in_slots, 0);
 165 
 166   int i;
 167   for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
 168     Register r = as_Register(i);
 169     if (r == G1 || r == G3 || r == G4 || r == G5) {
 170       int sp_offset = cpu_reg_save_offsets[i];
 171       oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset),
 172                                 r->as_VMReg());
 173     }
 174   }
 175 
 176   if (save_fpu_registers) {
 177     for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
 178       FloatRegister r = as_FloatRegister(i);
 179       int sp_offset = fpu_reg_save_offsets[i];
 180       oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset),
 181                                 r->as_VMReg());
 182     }
 183   }
 184   return oop_map;
 185 }
 186 
 187 #define __ this->
 188 
 189 void C1_MacroAssembler::save_live_registers_no_oop_map(bool save_fpu_registers) {
 190   assert(frame_size_in_bytes == __ total_frame_size_in_bytes(reg_save_size_in_words),
 191          "mismatch in calculation");
 192   __ save_frame_c1(frame_size_in_bytes);
 193 
 194   // Record volatile registers as callee-save values in an OopMap so their save locations will be
 195   // propagated to the caller frame's RegisterMap during StackFrameStream construction (needed for
 196   // deoptimization; see compiledVFrame::create_stack_value).  The caller's I, L and O registers
 197   // are saved in register windows - I's and L's in the caller's frame and O's in the stub frame
 198   // (as the stub's I's) when the runtime routine called by the stub creates its frame.
 199   // OopMap frame sizes are in c2 stack slot sizes (sizeof(jint))
 200 
 201   int i;
 202   for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
 203     Register r = as_Register(i);
 204     if (r == G1 || r == G3 || r == G4 || r == G5) {
 205       int sp_offset = cpu_reg_save_offsets[i];
 206       __ st_ptr(r, SP, (sp_offset * BytesPerWord) + STACK_BIAS);
 207     }
 208   }
 209 
 210   if (save_fpu_registers) {
 211     for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
 212       FloatRegister r = as_FloatRegister(i);
 213       int sp_offset = fpu_reg_save_offsets[i];
 214       __ stf(FloatRegisterImpl::S, r, SP, (sp_offset * BytesPerWord) + STACK_BIAS);
 215     }
 216   }
 217 }
 218 
 219 void C1_MacroAssembler::restore_live_registers(bool restore_fpu_registers) {
 220   for (int i = 0; i < FrameMap::nof_cpu_regs; i++) {
 221     Register r = as_Register(i);
 222     if (r == G1 || r == G3 || r == G4 || r == G5) {
 223       __ ld_ptr(SP, (cpu_reg_save_offsets[i] * BytesPerWord) + STACK_BIAS, r);
 224     }
 225   }
 226 
 227   if (restore_fpu_registers) {
 228     for (int i = 0; i < FrameMap::nof_fpu_regs; i++) {
 229       FloatRegister r = as_FloatRegister(i);
 230       __ ldf(FloatRegisterImpl::S, SP, (fpu_reg_save_offsets[i] * BytesPerWord) + STACK_BIAS, r);
 231     }
 232   }
 233 }
 234 
 235 #undef __
 236 #define __ sasm->
 237 
 238 static OopMap* save_live_registers(StubAssembler* sasm, bool save_fpu_registers = true) {
 239   sasm->save_live_registers_no_oop_map(save_fpu_registers);
 240   return generate_oop_map(sasm, save_fpu_registers);
 241 }
 242 
 243 static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) {
 244   sasm->restore_live_registers(restore_fpu_registers);
 245 }
 246 
 247 
 248 void Runtime1::initialize_pd() {
 249   // compute word offsets from SP at which live (non-windowed) registers are captured by stub routines
 250   //
 251   // A stub routine will have a frame that is at least large enough to hold
 252   // a register window save area (obviously) and the volatile g registers
 253   // and floating registers. A user of save_live_registers can have a frame
 254   // that has more scratch area in it (although typically they will use L-regs).
 255   // in that case the frame will look like this (stack growing down)
 256   //
 257   // FP -> |             |
 258   //       | scratch mem |
 259   //       |   "      "  |
 260   //       --------------
 261   //       | float regs  |
 262   //       |   "    "    |
 263   //       ---------------
 264   //       | G regs      |
 265   //       | "  "        |
 266   //       ---------------
 267   //       | abi reg.    |
 268   //       | window save |
 269   //       | area        |
 270   // SP -> ---------------
 271   //
 272   int i;
 273   int sp_offset = align_up((int)frame::register_save_words, 2); //  start doubleword aligned
 274 
 275   // only G int registers are saved explicitly; others are found in register windows
 276   for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
 277     Register r = as_Register(i);
 278     if (r == G1 || r == G3 || r == G4 || r == G5) {
 279       cpu_reg_save_offsets[i] = sp_offset;
 280       sp_offset++;
 281     }
 282   }
 283 
 284   // all float registers are saved explicitly
 285   assert(FrameMap::nof_fpu_regs == 32, "double registers not handled here");
 286   for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
 287     fpu_reg_save_offsets[i] = sp_offset;
 288     sp_offset++;
 289   }
 290   reg_save_size_in_words = sp_offset - frame::memory_parameter_word_sp_offset;
 291   // this should match assembler::total_frame_size_in_bytes, which
 292   // isn't callable from this context.  It's checked by an assert when
 293   // it's used though.
 294   frame_size_in_bytes = align_up(sp_offset * wordSize, 8);
 295 }
 296 
 297 
 298 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
 299   // make a frame and preserve the caller's caller-save registers
 300   OopMap* oop_map = save_live_registers(sasm);
 301   int call_offset;
 302   if (!has_argument) {
 303     call_offset = __ call_RT(noreg, noreg, target);
 304   } else {
 305     call_offset = __ call_RT(noreg, noreg, target, G4, G5);
 306   }
 307   OopMapSet* oop_maps = new OopMapSet();
 308   oop_maps->add_gc_map(call_offset, oop_map);
 309 
 310   __ should_not_reach_here();
 311   return oop_maps;
 312 }
 313 
 314 
 315 OopMapSet* Runtime1::generate_stub_call(StubAssembler* sasm, Register result, address target,
 316                                         Register arg1, Register arg2, Register arg3) {
 317   // make a frame and preserve the caller's caller-save registers
 318   OopMap* oop_map = save_live_registers(sasm);
 319 
 320   int call_offset;
 321   if (arg1 == noreg) {
 322     call_offset = __ call_RT(result, noreg, target);
 323   } else if (arg2 == noreg) {
 324     call_offset = __ call_RT(result, noreg, target, arg1);
 325   } else if (arg3 == noreg) {
 326     call_offset = __ call_RT(result, noreg, target, arg1, arg2);
 327   } else {
 328     call_offset = __ call_RT(result, noreg, target, arg1, arg2, arg3);
 329   }
 330   OopMapSet* oop_maps = NULL;
 331 
 332   oop_maps = new OopMapSet();
 333   oop_maps->add_gc_map(call_offset, oop_map);
 334   restore_live_registers(sasm);
 335 
 336   __ ret();
 337   __ delayed()->restore();
 338 
 339   return oop_maps;
 340 }
 341 
 342 
 343 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
 344   // make a frame and preserve the caller's caller-save registers
 345   OopMap* oop_map = save_live_registers(sasm);
 346 
 347   // call the runtime patching routine, returns non-zero if nmethod got deopted.
 348   int call_offset = __ call_RT(noreg, noreg, target);
 349   OopMapSet* oop_maps = new OopMapSet();
 350   oop_maps->add_gc_map(call_offset, oop_map);
 351 
 352   // re-execute the patched instruction or, if the nmethod was deoptmized, return to the
 353   // deoptimization handler entry that will cause re-execution of the current bytecode
 354   DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
 355   assert(deopt_blob != NULL, "deoptimization blob must have been created");
 356 
 357   Label no_deopt;
 358   __ br_null_short(O0, Assembler::pt, no_deopt);
 359 
 360   // return to the deoptimization handler entry for unpacking and rexecute
 361   // if we simply returned the we'd deopt as if any call we patched had just
 362   // returned.
 363 
 364   restore_live_registers(sasm);
 365 
 366   AddressLiteral dest(deopt_blob->unpack_with_reexecution());
 367   __ jump_to(dest, O0);
 368   __ delayed()->restore();
 369 
 370   __ bind(no_deopt);
 371   restore_live_registers(sasm);
 372   __ ret();
 373   __ delayed()->restore();
 374 
 375   return oop_maps;
 376 }
 377 
 378 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
 379 
 380   OopMapSet* oop_maps = NULL;
 381   // for better readability
 382   const bool must_gc_arguments = true;
 383   const bool dont_gc_arguments = false;
 384 
 385   // stub code & info for the different stubs
 386   switch (id) {
 387     case forward_exception_id:
 388       {
 389         oop_maps = generate_handle_exception(id, sasm);
 390       }
 391       break;
 392 
 393     case new_instance_id:
 394     case fast_new_instance_id:
 395     case fast_new_instance_init_check_id:
 396       {
 397         Register G5_klass = G5; // Incoming
 398         Register O0_obj   = O0; // Outgoing
 399 
 400         if (id == new_instance_id) {
 401           __ set_info("new_instance", dont_gc_arguments);
 402         } else if (id == fast_new_instance_id) {
 403           __ set_info("fast new_instance", dont_gc_arguments);
 404         } else {
 405           assert(id == fast_new_instance_init_check_id, "bad StubID");
 406           __ set_info("fast new_instance init check", dont_gc_arguments);
 407         }
 408 
 409         if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) &&
 410             UseTLAB && Universe::heap()->supports_inline_contig_alloc()) {
 411           Label slow_path;
 412           Register G1_obj_size = G1;
 413           Register G3_t1 = G3;
 414           Register G4_t2 = G4;
 415           assert_different_registers(G5_klass, G1_obj_size, G3_t1, G4_t2);
 416 
 417           // Push a frame since we may do dtrace notification for the
 418           // allocation which requires calling out and we don't want
 419           // to stomp the real return address.
 420           __ save_frame(0);
 421 
 422           if (id == fast_new_instance_init_check_id) {
 423             // make sure the klass is initialized
 424             __ ldub(G5_klass, in_bytes(InstanceKlass::init_state_offset()), G3_t1);
 425             __ cmp(G3_t1, InstanceKlass::fully_initialized);
 426             __ br(Assembler::notEqual, false, Assembler::pn, slow_path);
 427             __ delayed()->nop();
 428           }
 429 #ifdef ASSERT
 430           // assert object can be fast path allocated
 431           {
 432             Label ok, not_ok;
 433           __ ld(G5_klass, in_bytes(Klass::layout_helper_offset()), G1_obj_size);
 434           // make sure it's an instance (LH > 0)
 435           __ cmp_and_br_short(G1_obj_size, 0, Assembler::lessEqual, Assembler::pn, not_ok);
 436           __ btst(Klass::_lh_instance_slow_path_bit, G1_obj_size);
 437           __ br(Assembler::zero, false, Assembler::pn, ok);
 438           __ delayed()->nop();
 439           __ bind(not_ok);
 440           __ stop("assert(can be fast path allocated)");
 441           __ should_not_reach_here();
 442           __ bind(ok);
 443           }
 444 #endif // ASSERT
 445 
 446           // If we got here then the TLAB allocation failed, so try allocating directly from eden.
 447           // get the instance size
 448           __ ld(G5_klass, in_bytes(Klass::layout_helper_offset()), G1_obj_size);
 449           __ eden_allocate(O0_obj, G1_obj_size, 0, G3_t1, G4_t2, slow_path);
 450           __ incr_allocated_bytes(G1_obj_size, G3_t1, G4_t2);
 451 
 452           __ initialize_object(O0_obj, G5_klass, G1_obj_size, 0, G3_t1, G4_t2, /* is_tlab_allocated */ false);
 453           __ verify_oop(O0_obj);
 454           __ mov(O0, I0);
 455           __ ret();
 456           __ delayed()->restore();
 457 
 458           __ bind(slow_path);
 459 
 460           // pop this frame so generate_stub_call can push it's own
 461           __ restore();
 462         }
 463 
 464         oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_instance), G5_klass);
 465         // I0->O0: new instance
 466       }
 467 
 468       break;
 469 
 470     case counter_overflow_id:
 471         // G4 contains bci, G5 contains method
 472       oop_maps = generate_stub_call(sasm, noreg, CAST_FROM_FN_PTR(address, counter_overflow), G4, G5);
 473       break;
 474 
 475     case new_type_array_id:
 476     case new_object_array_id:
 477       {
 478         Register G5_klass = G5; // Incoming
 479         Register G4_length = G4; // Incoming
 480         Register O0_obj   = O0; // Outgoing
 481 
 482         Address klass_lh(G5_klass, Klass::layout_helper_offset());
 483         assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise");
 484         assert(Klass::_lh_header_size_mask == 0xFF, "bytewise");
 485         // Use this offset to pick out an individual byte of the layout_helper:
 486         const int klass_lh_header_size_offset = ((BytesPerInt - 1)  // 3 - 2 selects byte {0,1,0,0}
 487                                                  - Klass::_lh_header_size_shift / BitsPerByte);
 488 
 489         if (id == new_type_array_id) {
 490           __ set_info("new_type_array", dont_gc_arguments);
 491         } else {
 492           __ set_info("new_object_array", dont_gc_arguments);
 493         }
 494 
 495 #ifdef ASSERT
 496         // assert object type is really an array of the proper kind
 497         {
 498           Label ok;
 499           Register G3_t1 = G3;
 500           __ ld(klass_lh, G3_t1);
 501           __ sra(G3_t1, Klass::_lh_array_tag_shift, G3_t1);
 502           int tag = ((id == new_type_array_id)
 503                      ? Klass::_lh_array_tag_type_value
 504                      : Klass::_lh_array_tag_obj_value);
 505           __ cmp_and_brx_short(G3_t1, tag, Assembler::equal, Assembler::pt, ok);
 506           __ stop("assert(is an array klass)");
 507           __ should_not_reach_here();
 508           __ bind(ok);
 509         }
 510 #endif // ASSERT
 511 
 512         if (id == new_type_array_id) {
 513           oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_type_array), G5_klass, G4_length);
 514         } else {
 515           oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_object_array), G5_klass, G4_length);
 516         }
 517         // I0 -> O0: new array
 518       }
 519       break;
 520 
 521     case new_multi_array_id:
 522       { // O0: klass
 523         // O1: rank
 524         // O2: address of 1st dimension
 525         __ set_info("new_multi_array", dont_gc_arguments);
 526         oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_multi_array), I0, I1, I2);
 527         // I0 -> O0: new multi array
 528       }
 529       break;
 530 
 531     case register_finalizer_id:
 532       {
 533         __ set_info("register_finalizer", dont_gc_arguments);
 534 
 535         // load the klass and check the has finalizer flag
 536         Label register_finalizer;
 537         Register t = O1;
 538         __ load_klass(O0, t);
 539         __ ld(t, in_bytes(Klass::access_flags_offset()), t);
 540         __ set(JVM_ACC_HAS_FINALIZER, G3);
 541         __ andcc(G3, t, G0);
 542         __ br(Assembler::notZero, false, Assembler::pt, register_finalizer);
 543         __ delayed()->nop();
 544 
 545         // do a leaf return
 546         __ retl();
 547         __ delayed()->nop();
 548 
 549         __ bind(register_finalizer);
 550         OopMap* oop_map = save_live_registers(sasm);
 551         int call_offset = __ call_RT(noreg, noreg,
 552                                      CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), I0);
 553         oop_maps = new OopMapSet();
 554         oop_maps->add_gc_map(call_offset, oop_map);
 555 
 556         // Now restore all the live registers
 557         restore_live_registers(sasm);
 558 
 559         __ ret();
 560         __ delayed()->restore();
 561       }
 562       break;
 563 
 564     case throw_range_check_failed_id:
 565       { __ set_info("range_check_failed", dont_gc_arguments); // arguments will be discarded
 566         // G4: index
 567         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true);
 568       }
 569       break;
 570 
 571     case throw_index_exception_id:
 572       { __ set_info("index_range_check_failed", dont_gc_arguments); // arguments will be discarded
 573         // G4: index
 574         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
 575       }
 576       break;
 577 
 578     case throw_div0_exception_id:
 579       { __ set_info("throw_div0_exception", dont_gc_arguments);
 580         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
 581       }
 582       break;
 583 
 584     case throw_null_pointer_exception_id:
 585       { __ set_info("throw_null_pointer_exception", dont_gc_arguments);
 586         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
 587       }
 588       break;
 589 
 590     case handle_exception_id:
 591       { __ set_info("handle_exception", dont_gc_arguments);
 592         oop_maps = generate_handle_exception(id, sasm);
 593       }
 594       break;
 595 
 596     case handle_exception_from_callee_id:
 597       { __ set_info("handle_exception_from_callee", dont_gc_arguments);
 598         oop_maps = generate_handle_exception(id, sasm);
 599       }
 600       break;
 601 
 602     case unwind_exception_id:
 603       {
 604         // O0: exception
 605         // I7: address of call to this method
 606 
 607         __ set_info("unwind_exception", dont_gc_arguments);
 608         __ mov(Oexception, Oexception->after_save());
 609         __ add(I7, frame::pc_return_offset, Oissuing_pc->after_save());
 610 
 611         __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address),
 612                         G2_thread, Oissuing_pc->after_save());
 613         __ verify_not_null_oop(Oexception->after_save());
 614 
 615         // Restore SP from L7 if the exception PC is a method handle call site.
 616         __ mov(O0, G5);  // Save the target address.
 617         __ lduw(Address(G2_thread, JavaThread::is_method_handle_return_offset()), L0);
 618         __ tst(L0);  // Condition codes are preserved over the restore.
 619         __ restore();
 620 
 621         __ jmp(G5, 0);
 622         __ delayed()->movcc(Assembler::notZero, false, Assembler::icc, L7_mh_SP_save, SP);  // Restore SP if required.
 623       }
 624       break;
 625 
 626     case throw_array_store_exception_id:
 627       {
 628         __ set_info("throw_array_store_exception", dont_gc_arguments);
 629         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true);
 630       }
 631       break;
 632 
 633     case throw_class_cast_exception_id:
 634       {
 635         // G4: object
 636         __ set_info("throw_class_cast_exception", dont_gc_arguments);
 637         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
 638       }
 639       break;
 640 
 641     case throw_incompatible_class_change_error_id:
 642       {
 643         __ set_info("throw_incompatible_class_cast_exception", dont_gc_arguments);
 644         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
 645       }
 646       break;
 647 
 648     case slow_subtype_check_id:
 649       { // Support for uint StubRoutine::partial_subtype_check( Klass sub, Klass super );
 650         // Arguments :
 651         //
 652         //      ret  : G3
 653         //      sub  : G3, argument, destroyed
 654         //      super: G1, argument, not changed
 655         //      raddr: O7, blown by call
 656         Label miss;
 657 
 658         __ save_frame(0);               // Blow no registers!
 659 
 660         __ check_klass_subtype_slow_path(G3, G1, L0, L1, L2, L4, NULL, &miss);
 661 
 662         __ mov(1, G3);
 663         __ ret();                       // Result in G5 is 'true'
 664         __ delayed()->restore();        // free copy or add can go here
 665 
 666         __ bind(miss);
 667         __ mov(0, G3);
 668         __ ret();                       // Result in G5 is 'false'
 669         __ delayed()->restore();        // free copy or add can go here
 670       }
 671 
 672     case monitorenter_nofpu_id:
 673     case monitorenter_id:
 674       { // G4: object
 675         // G5: lock address
 676         __ set_info("monitorenter", dont_gc_arguments);
 677 
 678         int save_fpu_registers = (id == monitorenter_id);
 679         // make a frame and preserve the caller's caller-save registers
 680         OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
 681 
 682         int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), G4, G5);
 683 
 684         oop_maps = new OopMapSet();
 685         oop_maps->add_gc_map(call_offset, oop_map);
 686         restore_live_registers(sasm, save_fpu_registers);
 687 
 688         __ ret();
 689         __ delayed()->restore();
 690       }
 691       break;
 692 
 693     case monitorexit_nofpu_id:
 694     case monitorexit_id:
 695       { // G4: lock address
 696         // note: really a leaf routine but must setup last java sp
 697         //       => use call_RT for now (speed can be improved by
 698         //       doing last java sp setup manually)
 699         __ set_info("monitorexit", dont_gc_arguments);
 700 
 701         int save_fpu_registers = (id == monitorexit_id);
 702         // make a frame and preserve the caller's caller-save registers
 703         OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
 704 
 705         int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), G4);
 706 
 707         oop_maps = new OopMapSet();
 708         oop_maps->add_gc_map(call_offset, oop_map);
 709         restore_live_registers(sasm, save_fpu_registers);
 710 
 711         __ ret();
 712         __ delayed()->restore();
 713       }
 714       break;
 715 
 716     case deoptimize_id:
 717       {
 718         __ set_info("deoptimize", dont_gc_arguments);
 719         OopMap* oop_map = save_live_registers(sasm);
 720         int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, deoptimize), G4);
 721         oop_maps = new OopMapSet();
 722         oop_maps->add_gc_map(call_offset, oop_map);
 723         restore_live_registers(sasm);
 724         DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
 725         assert(deopt_blob != NULL, "deoptimization blob must have been created");
 726         AddressLiteral dest(deopt_blob->unpack_with_reexecution());
 727         __ jump_to(dest, O0);
 728         __ delayed()->restore();
 729       }
 730       break;
 731 
 732     case access_field_patching_id:
 733       { __ set_info("access_field_patching", dont_gc_arguments);
 734         oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
 735       }
 736       break;
 737 
 738     case load_klass_patching_id:
 739       { __ set_info("load_klass_patching", dont_gc_arguments);
 740         oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
 741       }
 742       break;
 743 
 744     case load_mirror_patching_id:
 745       { __ set_info("load_mirror_patching", dont_gc_arguments);
 746         oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
 747       }
 748       break;
 749 
 750     case load_appendix_patching_id:
 751       { __ set_info("load_appendix_patching", dont_gc_arguments);
 752         oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
 753       }
 754       break;
 755 
 756     case dtrace_object_alloc_id:
 757       { // O0: object
 758         __ set_info("dtrace_object_alloc", dont_gc_arguments);
 759         // we can't gc here so skip the oopmap but make sure that all
 760         // the live registers get saved.
 761         save_live_registers(sasm);
 762 
 763         __ save_thread(L7_thread_cache);
 764         __ call(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc),
 765                 relocInfo::runtime_call_type);
 766         __ delayed()->mov(I0, O0);
 767         __ restore_thread(L7_thread_cache);
 768 
 769         restore_live_registers(sasm);
 770         __ ret();
 771         __ delayed()->restore();
 772       }
 773       break;
 774 
 775     case predicate_failed_trap_id:
 776       {
 777         __ set_info("predicate_failed_trap", dont_gc_arguments);
 778         OopMap* oop_map = save_live_registers(sasm);
 779 
 780         int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap));
 781 
 782         oop_maps = new OopMapSet();
 783         oop_maps->add_gc_map(call_offset, oop_map);
 784 
 785         DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
 786         assert(deopt_blob != NULL, "deoptimization blob must have been created");
 787         restore_live_registers(sasm);
 788 
 789         AddressLiteral dest(deopt_blob->unpack_with_reexecution());
 790         __ jump_to(dest, O0);
 791         __ delayed()->restore();
 792       }
 793       break;
 794 
 795     default:
 796       { __ set_info("unimplemented entry", dont_gc_arguments);
 797         __ save_frame(0);
 798         __ set((int)id, O1);
 799         __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), O1);
 800         __ should_not_reach_here();
 801       }
 802       break;
 803   }
 804   return oop_maps;
 805 }
 806 
 807 
 808 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler* sasm) {
 809   __ block_comment("generate_handle_exception");
 810 
 811   // Save registers, if required.
 812   OopMapSet* oop_maps = new OopMapSet();
 813   OopMap* oop_map = NULL;
 814   switch (id) {
 815   case forward_exception_id:
 816     // We're handling an exception in the context of a compiled frame.
 817     // The registers have been saved in the standard places.  Perform
 818     // an exception lookup in the caller and dispatch to the handler
 819     // if found.  Otherwise unwind and dispatch to the callers
 820     // exception handler.
 821      oop_map = generate_oop_map(sasm, true);
 822 
 823      // transfer the pending exception to the exception_oop
 824      __ ld_ptr(G2_thread, in_bytes(JavaThread::pending_exception_offset()), Oexception);
 825      __ ld_ptr(Oexception, 0, G0);
 826      __ st_ptr(G0, G2_thread, in_bytes(JavaThread::pending_exception_offset()));
 827      __ add(I7, frame::pc_return_offset, Oissuing_pc);
 828     break;
 829   case handle_exception_id:
 830     // At this point all registers MAY be live.
 831     oop_map = save_live_registers(sasm);
 832     __ mov(Oexception->after_save(),  Oexception);
 833     __ mov(Oissuing_pc->after_save(), Oissuing_pc);
 834     break;
 835   case handle_exception_from_callee_id:
 836     // At this point all registers except exception oop (Oexception)
 837     // and exception pc (Oissuing_pc) are dead.
 838     oop_map = new OopMap(frame_size_in_bytes / sizeof(jint), 0);
 839     sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
 840     __ save_frame_c1(frame_size_in_bytes);
 841     __ mov(Oexception->after_save(),  Oexception);
 842     __ mov(Oissuing_pc->after_save(), Oissuing_pc);
 843     break;
 844   default:  ShouldNotReachHere();
 845   }
 846 
 847   __ verify_not_null_oop(Oexception);
 848 
 849 #ifdef ASSERT
 850   // check that fields in JavaThread for exception oop and issuing pc are
 851   // empty before writing to them
 852   Label oop_empty;
 853   Register scratch = I7;  // We can use I7 here because it's overwritten later anyway.
 854   __ ld_ptr(Address(G2_thread, JavaThread::exception_oop_offset()), scratch);
 855   __ br_null(scratch, false, Assembler::pt, oop_empty);
 856   __ delayed()->nop();
 857   __ stop("exception oop already set");
 858   __ bind(oop_empty);
 859 
 860   Label pc_empty;
 861   __ ld_ptr(Address(G2_thread, JavaThread::exception_pc_offset()), scratch);
 862   __ br_null(scratch, false, Assembler::pt, pc_empty);
 863   __ delayed()->nop();
 864   __ stop("exception pc already set");
 865   __ bind(pc_empty);
 866 #endif
 867 
 868   // save the exception and issuing pc in the thread
 869   __ st_ptr(Oexception,  G2_thread, in_bytes(JavaThread::exception_oop_offset()));
 870   __ st_ptr(Oissuing_pc, G2_thread, in_bytes(JavaThread::exception_pc_offset()));
 871 
 872   // use the throwing pc as the return address to lookup (has bci & oop map)
 873   __ mov(Oissuing_pc, I7);
 874   __ sub(I7, frame::pc_return_offset, I7);
 875   int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
 876   oop_maps->add_gc_map(call_offset, oop_map);
 877 
 878   // Note: if nmethod has been deoptimized then regardless of
 879   // whether it had a handler or not we will deoptimize
 880   // by entering the deopt blob with a pending exception.
 881 
 882   // Restore the registers that were saved at the beginning, remove
 883   // the frame and jump to the exception handler.
 884   switch (id) {
 885   case forward_exception_id:
 886   case handle_exception_id:
 887     restore_live_registers(sasm);
 888     __ jmp(O0, 0);
 889     __ delayed()->restore();
 890     break;
 891   case handle_exception_from_callee_id:
 892     // Restore SP from L7 if the exception PC is a method handle call site.
 893     __ mov(O0, G5);  // Save the target address.
 894     __ lduw(Address(G2_thread, JavaThread::is_method_handle_return_offset()), L0);
 895     __ tst(L0);  // Condition codes are preserved over the restore.
 896     __ restore();
 897 
 898     __ jmp(G5, 0);  // jump to the exception handler
 899     __ delayed()->movcc(Assembler::notZero, false, Assembler::icc, L7_mh_SP_save, SP);  // Restore SP if required.
 900     break;
 901   default:  ShouldNotReachHere();
 902   }
 903 
 904   return oop_maps;
 905 }
 906 
 907 
 908 #undef __
 909 
 910 const char *Runtime1::pd_name_for_address(address entry) {
 911   return "<unknown function>";
 912 }