jdk

Форк
0
/
c1_FrameMap.cpp 
334 строки · 12.0 Кб
1
/*
2
 * Copyright (c) 2000, 2023, 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_FrameMap.hpp"
27
#include "c1/c1_LIR.hpp"
28
#include "code/vmreg.inline.hpp"
29
#include "runtime/sharedRuntime.hpp"
30
#include "utilities/align.hpp"
31

32
//-----------------------------------------------------
33

34
// Convert method signature into an array of BasicTypes for the arguments
35
BasicTypeArray* FrameMap::signature_type_array_for(const ciMethod* method) {
36
  ciSignature* sig = method->signature();
37
  BasicTypeList* sta = new BasicTypeList(method->arg_size());
38
  // add receiver, if any
39
  if (!method->is_static()) sta->append(T_OBJECT);
40
  // add remaining arguments
41
  for (int i = 0; i < sig->count(); i++) {
42
    ciType* type = sig->type_at(i);
43
    BasicType t = type->basic_type();
44
    if (t == T_ARRAY) {
45
      t = T_OBJECT;
46
    }
47
    sta->append(t);
48
  }
49
  // done
50
  return sta;
51
}
52

53

54
CallingConvention* FrameMap::java_calling_convention(const BasicTypeArray* signature, bool outgoing) {
55
  // compute the size of the arguments first.  The signature array
56
  // that java_calling_convention takes includes a T_VOID after double
57
  // work items but our signatures do not.
58
  int i;
59
  int sizeargs = 0;
60
  for (i = 0; i < signature->length(); i++) {
61
    sizeargs += type2size[signature->at(i)];
62
  }
63

64
  BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs);
65
  VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs);
66
  int sig_index = 0;
67
  for (i = 0; i < sizeargs; i++, sig_index++) {
68
    sig_bt[i] = signature->at(sig_index);
69
    if (sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) {
70
      sig_bt[i + 1] = T_VOID;
71
      i++;
72
    }
73
  }
74

75
  intptr_t out_preserve = align_up(SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs), 2);
76
  LIR_OprList* args = new LIR_OprList(signature->length());
77
  for (i = 0; i < sizeargs;) {
78
    BasicType t = sig_bt[i];
79
    assert(t != T_VOID, "should be skipping these");
80
    LIR_Opr opr = map_to_opr(t, regs + i, outgoing);
81
    args->append(opr);
82
    if (opr->is_address()) {
83
      LIR_Address* addr = opr->as_address_ptr();
84
      assert(addr->disp() == (int)addr->disp(), "out of range value");
85
      out_preserve = MAX2(out_preserve, (intptr_t)addr->disp() / 4);
86
    }
87
    i += type2size[t];
88
  }
89
  assert(args->length() == signature->length(), "size mismatch");
90
  out_preserve += SharedRuntime::out_preserve_stack_slots();
91

92
  if (outgoing) {
93
    // update the space reserved for arguments.
94
    update_reserved_argument_area_size(out_preserve * BytesPerWord);
95
  }
96
  return new CallingConvention(args, out_preserve);
97
}
98

99

100
CallingConvention* FrameMap::c_calling_convention(const BasicTypeArray* signature) {
101
  // compute the size of the arguments first.  The signature array
102
  // that java_calling_convention takes includes a T_VOID after double
103
  // work items but our signatures do not.
104
  int i;
105
  int sizeargs = 0;
106
  for (i = 0; i < signature->length(); i++) {
107
    sizeargs += type2size[signature->at(i)];
108
  }
109

110
  BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs);
111
  VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs);
112
  int sig_index = 0;
113
  for (i = 0; i < sizeargs; i++, sig_index++) {
114
    sig_bt[i] = signature->at(sig_index);
115
    if (sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) {
116
      sig_bt[i + 1] = T_VOID;
117
      i++;
118
    }
119
  }
120

121
  intptr_t out_preserve = SharedRuntime::c_calling_convention(sig_bt, regs, sizeargs);
122
  LIR_OprList* args = new LIR_OprList(signature->length());
123
  for (i = 0; i < sizeargs;) {
124
    BasicType t = sig_bt[i];
125
    assert(t != T_VOID, "should be skipping these");
126

127
    // C calls are always outgoing
128
    bool outgoing = true;
129
    LIR_Opr opr = map_to_opr(t, regs + i, outgoing);
130
    // they might be of different types if for instance floating point
131
    // values are passed in cpu registers, but the sizes must match.
132
    assert(type2size[opr->type()] == type2size[t], "type mismatch");
133
    args->append(opr);
134
    if (opr->is_address()) {
135
      LIR_Address* addr = opr->as_address_ptr();
136
      out_preserve = MAX2(out_preserve, (intptr_t)addr->disp() / 4);
137
    }
138
    i += type2size[t];
139
  }
140
  assert(args->length() == signature->length(), "size mismatch");
141
  out_preserve += SharedRuntime::out_preserve_stack_slots();
142
  update_reserved_argument_area_size(out_preserve * BytesPerWord);
143
  return new CallingConvention(args, out_preserve);
144
}
145

146

147
//--------------------------------------------------------
148
//               FrameMap
149
//--------------------------------------------------------
150

151
bool      FrameMap::_init_done = false;
152
Register  FrameMap::_cpu_rnr2reg [FrameMap::nof_cpu_regs];
153
int       FrameMap::_cpu_reg2rnr [FrameMap::nof_cpu_regs];
154

155

156
FrameMap::FrameMap(ciMethod* method, int monitors, int reserved_argument_area_size) {
157
  assert(_init_done, "should already be completed");
158

159
  _framesize = -1;
160
  _num_spills = -1;
161

162
  assert(monitors >= 0, "not set");
163
  _num_monitors = monitors;
164
  assert(reserved_argument_area_size >= 0, "not set");
165

166
  // reserved_argument_area_size does not include stack space that needs to be occupied in the stub
167
  // and the stub will modify the value through update_reserved_argument_area_size(int size) if needed.
168
  // see the constructor of class CounterOverflowStub for example.
169
  _reserved_argument_area_size = reserved_argument_area_size * BytesPerWord;
170

171
  _argcount = method->arg_size();
172
  _argument_locations = new intArray(_argcount, _argcount, -1);
173
  _incoming_arguments = java_calling_convention(signature_type_array_for(method), false);
174
  _oop_map_arg_count = _incoming_arguments->reserved_stack_slots();
175

176
  int java_index = 0;
177
  for (int i = 0; i < _incoming_arguments->length(); i++) {
178
    LIR_Opr opr = _incoming_arguments->at(i);
179
    if (opr->is_address()) {
180
      LIR_Address* address = opr->as_address_ptr();
181
      _argument_locations->at_put(java_index, address->disp());
182
      _incoming_arguments->args()->at_put(i, LIR_OprFact::stack(java_index, as_BasicType(as_ValueType(address->type()))));
183
    }
184
    java_index += type2size[opr->type()];
185
  }
186

187
}
188

189

190
bool FrameMap::finalize_frame(int nof_slots) {
191
  assert(nof_slots >= 0, "must be positive");
192
  assert(_num_spills == -1, "can only be set once");
193
  _num_spills = nof_slots;
194
  assert(_framesize == -1, "should only be calculated once");
195
  _framesize =  align_up(in_bytes(sp_offset_for_monitor_base(0)) +
196
                         _num_monitors * (int)sizeof(BasicObjectLock) +
197
                         (int)sizeof(intptr_t) +                        // offset of deopt orig pc
198
                         frame_pad_in_bytes,
199
                         StackAlignmentInBytes) / 4;
200
  int java_index = 0;
201
  for (int i = 0; i < _incoming_arguments->length(); i++) {
202
    LIR_Opr opr = _incoming_arguments->at(i);
203
    if (opr->is_stack()) {
204
      _argument_locations->at_put(java_index, in_bytes(framesize_in_bytes()) +
205
                                  _argument_locations->at(java_index));
206
    }
207
    java_index += type2size[opr->type()];
208
  }
209
  // make sure it's expressible on the platform
210
  return validate_frame();
211
}
212

213
VMReg FrameMap::sp_offset2vmreg(ByteSize offset) const {
214
  int offset_in_bytes = in_bytes(offset);
215
  assert(offset_in_bytes % 4 == 0, "must be multiple of 4 bytes");
216
  assert(offset_in_bytes / 4 < framesize() + oop_map_arg_count(), "out of range");
217
  return VMRegImpl::stack2reg(offset_in_bytes / 4);
218
}
219

220

221
bool FrameMap::location_for_sp_offset(ByteSize byte_offset_from_sp,
222
                                      Location::Type loc_type,
223
                                      Location* loc) const {
224
  int offset = in_bytes(byte_offset_from_sp);
225
  assert(offset >= 0, "incorrect offset");
226
  if (!Location::legal_offset_in_bytes(offset)) {
227
    return false;
228
  }
229
  Location tmp_loc = Location::new_stk_loc(loc_type, offset);
230
  *loc = tmp_loc;
231
  return true;
232
}
233

234

235
bool FrameMap::locations_for_slot  (int index, Location::Type loc_type,
236
                                     Location* loc, Location* second) const {
237
  ByteSize offset_from_sp = sp_offset_for_slot(index);
238
  if (!location_for_sp_offset(offset_from_sp, loc_type, loc)) {
239
    return false;
240
  }
241
  if (second != nullptr) {
242
    // two word item
243
    offset_from_sp = offset_from_sp + in_ByteSize(4);
244
    return location_for_sp_offset(offset_from_sp, loc_type, second);
245
  }
246
  return true;
247
}
248

249
//////////////////////
250
// Public accessors //
251
//////////////////////
252

253

254
ByteSize FrameMap::sp_offset_for_slot(const int index) const {
255
  if (index < argcount()) {
256
    int offset = _argument_locations->at(index);
257
    assert(offset != -1, "not a memory argument");
258
    assert(offset >= framesize() * 4, "argument inside of frame");
259
    return in_ByteSize(offset);
260
  }
261
  ByteSize offset = sp_offset_for_spill(index - argcount());
262
  assert(in_bytes(offset) < framesize() * 4, "spill outside of frame");
263
  return offset;
264
}
265

266

267
ByteSize FrameMap::sp_offset_for_double_slot(const int index) const {
268
  ByteSize offset = sp_offset_for_slot(index);
269
  if (index >= argcount()) {
270
    assert(in_bytes(offset) + 4 < framesize() * 4, "spill outside of frame");
271
  }
272
  return offset;
273
}
274

275

276
ByteSize FrameMap::sp_offset_for_spill(const int index) const {
277
  assert(index >= 0 && index < _num_spills, "out of range");
278
  int offset = align_up(first_available_sp_in_frame + _reserved_argument_area_size, (int)sizeof(double)) +
279
    index * spill_slot_size_in_bytes;
280
  return in_ByteSize(offset);
281
}
282

283
ByteSize FrameMap::sp_offset_for_monitor_base(const int index) const {
284
  int end_of_spills = align_up(first_available_sp_in_frame + _reserved_argument_area_size, (int)sizeof(double)) +
285
    _num_spills * spill_slot_size_in_bytes;
286
  int offset = align_up(end_of_spills, HeapWordSize) + index * (int)sizeof(BasicObjectLock);
287
  return in_ByteSize(offset);
288
}
289

290
ByteSize FrameMap::sp_offset_for_monitor_lock(int index) const {
291
  check_monitor_index(index);
292
  return sp_offset_for_monitor_base(index) + BasicObjectLock::lock_offset();
293
}
294

295
ByteSize FrameMap::sp_offset_for_monitor_object(int index) const {
296
  check_monitor_index(index);
297
  return sp_offset_for_monitor_base(index) + BasicObjectLock::obj_offset();
298
}
299

300

301
// For OopMaps, map a local variable or spill index to an VMReg.
302
// This is the offset from sp() in the frame of the slot for the index,
303
// skewed by SharedInfo::stack0 to indicate a stack location (vs.a register.)
304
//
305
//         C ABI size +
306
//         framesize +     framesize +
307
//         stack0          stack0         stack0          0 <- VMReg->value()
308
//            |              |              | <registers> |
309
//  ..........|..............|..............|.............|
310
//    0 1 2 3 | <C ABI area> | 4 5 6 ...... |               <- local indices
311
//    ^                        ^          sp()
312
//    |                        |
313
//  arguments            non-argument locals
314

315

316
VMReg FrameMap::regname(LIR_Opr opr) const {
317
  if (opr->is_single_cpu()) {
318
    assert(!opr->is_virtual(), "should not see virtual registers here");
319
    return opr->as_register()->as_VMReg();
320
  } else if (opr->is_single_stack()) {
321
    return sp_offset2vmreg(sp_offset_for_slot(opr->single_stack_ix()));
322
  } else if (opr->is_address()) {
323
    LIR_Address* addr = opr->as_address_ptr();
324
    assert(addr->base() == stack_pointer(), "sp based addressing only");
325
    return sp_offset2vmreg(in_ByteSize(addr->index()->as_jint()));
326
  }
327
  ShouldNotReachHere();
328
  return VMRegImpl::Bad();
329
}
330

331

332

333

334
// ------------ extra spill slots ---------------
335

Использование cookies

Мы используем файлы cookie в соответствии с Политикой конфиденциальности и Политикой использования cookies.

Нажимая кнопку «Принимаю», Вы даете АО «СберТех» согласие на обработку Ваших персональных данных в целях совершенствования нашего веб-сайта и Сервиса GitVerse, а также повышения удобства их использования.

Запретить использование cookies Вы можете самостоятельно в настройках Вашего браузера.