cpython/Python/specialize.c at 61c7249759ce88465ea655d5c19d17d03ff3f74b · python/cpython · GitHub

History

2477 lines (2377 loc) · 86.3 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

378

379

380

381

382

383

384

385

386

387

388

389

390

391

392

393

394

395

396

397

398

399

400

401

402

403

404

405

406

407

408

409

410

411

412

413

414

415

416

417

418

419

420

421

422

423

424

425

426

427

428

429

430

431

432

433

434

435

436

437

438

439

440

441

442

443

444

445

446

447

448

449

450

451

452

453

454

455

456

457

458

459

460

461

462

463

464

465

466

467

468

469

470

471

472

473

474

475

476

477

478

479

480

481

482

483

484

485

486

487

488

489

490

491

492

493

494

495

496

497

498

499

500

501

502

503

504

505

506

507

508

509

510

511

512

513

514

515

516

517

518

519

520

521

522

523

524

525

526

527

528

529

530

531

532

533

534

535

536

537

538

539

540

541

542

543

544

545

546

547

548

549

550

551

552

553

554

555

556

557

558

559

560

561

562

563

564

565

566

567

568

569

570

571

572

573

574

575

576

577

578

579

580

581

582

583

584

585

586

587

588

589

590

591

592

593

594

595

596

597

598

599

600

601

602

603

604

605

606

607

608

609

610

611

612

613

614

615

616

617

618

619

620

621

622

623

624

625

626

627

628

629

630

631

632

633

634

635

636

637

638

639

640

641

642

643

644

645

646

647

648

649

650

651

652

653

654

655

656

657

658

659

660

661

662

663

664

665

666

667

668

669

670

671

672

673

674

675

676

677

678

679

680

681

682

683

684

685

686

687

688

689

690

691

692

693

694

695

696

697

698

699

700

701

702

703

704

705

706

707

708

709

710

711

712

713

714

715

716

717

718

719

720

721

722

723

724

725

726

727

728

729

730

731

732

733

734

735

736

737

738

739

740

741

742

743

744

745

746

747

748

749

750

751

752

753

754

755

756

757

758

759

760

761

762

763

764

765

766

767

768

769

770

771

772

773

774

775

776

777

778

779

780

781

782

783

784

785

786

787

788

789

790

791

792

793

794

795

796

797

798

799

800

801

802

803

804

805

806

807

808

809

810

811

812

813

814

815

816

817

818

819

820

821

822

823

824

825

826

827

828

829

830

831

832

833

834

835

836

837

838

839

840

841

842

843

844

845

846

847

848

849

850

851

852

853

854

855

856

857

858

859

860

861

862

863

864

865

866

867

868

869

870

871

872

873

874

875

876

877

878

879

880

881

882

883

884

885

886

887

888

889

890

891

892

893

894

895

896

897

898

899

900

901

902

903

904

905

906

907

908

909

910

911

912

913

914

915

916

917

918

919

920

921

922

923

924

925

926

927

928

929

930

931

932

933

934

935

936

937

938

939

940

941

942

943

944

945

946

947

948

949

950

951

952

953

954

955

956

957

958

959

960

961

962

963

964

965

966

967

968

969

970

971

972

973

974

975

976

977

978

979

980

981

982

983

984

985

986

987

988

989

990

991

992

993

994

995

996

997

998

999

1000

#include "Python.h"

#include "pycore_code.h"

#include "pycore_descrobject.h" // _PyMethodWrapper_Type

#include "pycore_dict.h"

#include "pycore_function.h" // _PyFunction_GetVersionForCurrentState()

#include "pycore_global_strings.h" // _Py_ID()

#include "pycore_long.h"

#include "pycore_moduleobject.h"

#include "pycore_object.h"

#include "pycore_opcode.h" // _PyOpcode_Caches

#include "pycore_pylifecycle.h" // _PyOS_URandomNonblock()

#include <stdlib.h> // rand()

/* For guidance on adding or extending families of instructions see

* ./adaptive.md

#ifdef Py_STATS

GCStats _py_gc_stats[NUM_GENERATIONS] = { 0 };

PyStats _py_stats_struct = { .gc_stats = &_py_gc_stats[0] };

PyStats *_py_stats = NULL;

#define ADD_STAT_TO_DICT(res, field) \

do { \

PyObject *val = PyLong_FromUnsignedLongLong(stats->field); \

if (val == NULL) { \

Py_DECREF(res); \

return NULL; \

} \

if (PyDict_SetItemString(res, #field, val) == -1) { \

Py_DECREF(res); \

Py_DECREF(val); \

return NULL; \

} \

Py_DECREF(val); \

} while(0);

static PyObject*

stats_to_dict(SpecializationStats *stats)

{

PyObject *res = PyDict_New();

if (res == NULL) {

return NULL;

}

ADD_STAT_TO_DICT(res, success);

ADD_STAT_TO_DICT(res, failure);

ADD_STAT_TO_DICT(res, hit);

ADD_STAT_TO_DICT(res, deferred);

ADD_STAT_TO_DICT(res, miss);

ADD_STAT_TO_DICT(res, deopt);

PyObject *failure_kinds = PyTuple_New(SPECIALIZATION_FAILURE_KINDS);

if (failure_kinds == NULL) {

Py_DECREF(res);

return NULL;

}

for (int i = 0; i < SPECIALIZATION_FAILURE_KINDS; i++) {

PyObject *stat = PyLong_FromUnsignedLongLong(stats->failure_kinds[i]);

if (stat == NULL) {

Py_DECREF(res);

Py_DECREF(failure_kinds);

return NULL;

}

PyTuple_SET_ITEM(failure_kinds, i, stat);

}

if (PyDict_SetItemString(res, "failure_kinds", failure_kinds)) {

Py_DECREF(res);

Py_DECREF(failure_kinds);

return NULL;

}

Py_DECREF(failure_kinds);

return res;

}

#undef ADD_STAT_TO_DICT

static int

add_stat_dict(

PyObject *res,

int opcode,

const char *name) {

SpecializationStats *stats = &_py_stats_struct.opcode_stats[opcode].specialization;

PyObject *d = stats_to_dict(stats);

if (d == NULL) {

return -1;

}

int err = PyDict_SetItemString(res, name, d);

Py_DECREF(d);

return err;

}

#ifdef Py_STATS

PyObject*

_Py_GetSpecializationStats(void) {

PyObject *stats = PyDict_New();

if (stats == NULL) {

return NULL;

}

int err = 0;

err += add_stat_dict(stats, LOAD_SUPER_ATTR, "load_super_attr");

err += add_stat_dict(stats, LOAD_ATTR, "load_attr");

err += add_stat_dict(stats, LOAD_GLOBAL, "load_global");

err += add_stat_dict(stats, BINARY_SUBSCR, "binary_subscr");

err += add_stat_dict(stats, STORE_SUBSCR, "store_subscr");

err += add_stat_dict(stats, STORE_ATTR, "store_attr");

err += add_stat_dict(stats, CALL, "call");

err += add_stat_dict(stats, BINARY_OP, "binary_op");

err += add_stat_dict(stats, COMPARE_OP, "compare_op");

err += add_stat_dict(stats, UNPACK_SEQUENCE, "unpack_sequence");

err += add_stat_dict(stats, FOR_ITER, "for_iter");

err += add_stat_dict(stats, TO_BOOL, "to_bool");

err += add_stat_dict(stats, SEND, "send");

if (err < 0) {

Py_DECREF(stats);

return NULL;

}

return stats;

}

#endif

#define PRINT_STAT(i, field) \

if (stats[i].field) { \

fprintf(out, " opcode[%d]." #field " : %" PRIu64 "\n", i, stats[i].field); \

}

static void

print_spec_stats(FILE *out, OpcodeStats *stats)

{

/* Mark some opcodes as specializable for stats,

* even though we don't specialize them yet. */

fprintf(out, "opcode[%d].specializable : 1\n", BINARY_SLICE);

fprintf(out, "opcode[%d].specializable : 1\n", STORE_SLICE);

for (int i = 0; i < 256; i++) {

if (_PyOpcode_Caches[i]) {

fprintf(out, "opcode[%d].specializable : 1\n", i);

}

PRINT_STAT(i, specialization.success);

PRINT_STAT(i, specialization.failure);

PRINT_STAT(i, specialization.hit);

PRINT_STAT(i, specialization.deferred);

PRINT_STAT(i, specialization.miss);

PRINT_STAT(i, specialization.deopt);

PRINT_STAT(i, execution_count);

for (int j = 0; j < SPECIALIZATION_FAILURE_KINDS; j++) {

uint64_t val = stats[i].specialization.failure_kinds[j];

if (val) {

fprintf(out, " opcode[%d].specialization.failure_kinds[%d] : %"

PRIu64 "\n", i, j, val);

}

for (int j = 0; j < 256; j++) {

if (stats[i].pair_count[j]) {

fprintf(out, "opcode[%d].pair_count[%d] : %" PRIu64 "\n",

i, j, stats[i].pair_count[j]);

}

#undef PRINT_STAT

static void

print_call_stats(FILE *out, CallStats *stats)

{

fprintf(out, "Calls to PyEval_EvalDefault: %" PRIu64 "\n", stats->pyeval_calls);

fprintf(out, "Calls to Python functions inlined: %" PRIu64 "\n", stats->inlined_py_calls);

fprintf(out, "Frames pushed: %" PRIu64 "\n", stats->frames_pushed);

fprintf(out, "Frame objects created: %" PRIu64 "\n", stats->frame_objects_created);

for (int i = 0; i < EVAL_CALL_KINDS; i++) {

fprintf(out, "Calls via PyEval_EvalFrame[%d] : %" PRIu64 "\n", i, stats->eval_calls[i]);

}

static void

print_object_stats(FILE *out, ObjectStats *stats)

{

fprintf(out, "Object allocations from freelist: %" PRIu64 "\n", stats->from_freelist);

fprintf(out, "Object frees to freelist: %" PRIu64 "\n", stats->to_freelist);

fprintf(out, "Object allocations: %" PRIu64 "\n", stats->allocations);

fprintf(out, "Object allocations to 512 bytes: %" PRIu64 "\n", stats->allocations512);

fprintf(out, "Object allocations to 4 kbytes: %" PRIu64 "\n", stats->allocations4k);

fprintf(out, "Object allocations over 4 kbytes: %" PRIu64 "\n", stats->allocations_big);

fprintf(out, "Object frees: %" PRIu64 "\n", stats->frees);

fprintf(out, "Object new values: %" PRIu64 "\n", stats->new_values);

fprintf(out, "Object interpreter increfs: %" PRIu64 "\n", stats->interpreter_increfs);

fprintf(out, "Object interpreter decrefs: %" PRIu64 "\n", stats->interpreter_decrefs);

fprintf(out, "Object increfs: %" PRIu64 "\n", stats->increfs);

fprintf(out, "Object decrefs: %" PRIu64 "\n", stats->decrefs);

fprintf(out, "Object materialize dict (on request): %" PRIu64 "\n", stats->dict_materialized_on_request);

fprintf(out, "Object materialize dict (new key): %" PRIu64 "\n", stats->dict_materialized_new_key);

fprintf(out, "Object materialize dict (too big): %" PRIu64 "\n", stats->dict_materialized_too_big);

fprintf(out, "Object materialize dict (str subclass): %" PRIu64 "\n", stats->dict_materialized_str_subclass);

fprintf(out, "Object dematerialize dict: %" PRIu64 "\n", stats->dict_dematerialized);

fprintf(out, "Object method cache hits: %" PRIu64 "\n", stats->type_cache_hits);

fprintf(out, "Object method cache misses: %" PRIu64 "\n", stats->type_cache_misses);

fprintf(out, "Object method cache collisions: %" PRIu64 "\n", stats->type_cache_collisions);

fprintf(out, "Object method cache dunder hits: %" PRIu64 "\n", stats->type_cache_dunder_hits);

fprintf(out, "Object method cache dunder misses: %" PRIu64 "\n", stats->type_cache_dunder_misses);

fprintf(out, "Optimization attempts: %" PRIu64 "\n", stats->optimization_attempts);

fprintf(out, "Optimization traces created: %" PRIu64 "\n", stats->optimization_traces_created);

fprintf(out, "Optimization traces executed: %" PRIu64 "\n", stats->optimization_traces_executed);

fprintf(out, "Optimization uops executed: %" PRIu64 "\n", stats->optimization_uops_executed);

}

static void

print_gc_stats(FILE *out, GCStats *stats)

{

for (int i = 0; i < NUM_GENERATIONS; i++) {

fprintf(out, "GC[%d] collections: %" PRIu64 "\n", i, stats[i].collections);

fprintf(out, "GC[%d] object visits: %" PRIu64 "\n", i, stats[i].object_visits);

fprintf(out, "GC[%d] objects collected: %" PRIu64 "\n", i, stats[i].objects_collected);

}

static void

print_stats(FILE *out, PyStats *stats) {

print_spec_stats(out, stats->opcode_stats);

print_call_stats(out, &stats->call_stats);

print_object_stats(out, &stats->object_stats);

print_gc_stats(out, stats->gc_stats);

}

void

_Py_StatsClear(void)

{

for (int i = 0; i < NUM_GENERATIONS; i++) {

_py_gc_stats[i] = (GCStats) { 0 };

}

_py_stats_struct = (PyStats) { 0 };

_py_stats_struct.gc_stats = _py_gc_stats;

}

void

_Py_PrintSpecializationStats(int to_file)

{

FILE *out = stderr;

if (to_file) {

/* Write to a file instead of stderr. */

# ifdef MS_WINDOWS

const char *dirname = "c:\\temp\\py_stats\\";

# else

const char *dirname = "/tmp/py_stats/";

# endif

/* Use random 160 bit number as file name,

* to avoid both accidental collisions and

* symlink attacks. */

unsigned char rand[20];

char hex_name[41];

_PyOS_URandomNonblock(rand, 20);

for (int i = 0; i < 20; i++) {

hex_name[2*i] = "0123456789abcdef"[rand[i]&15];

hex_name[2*i+1] = "0123456789abcdef"[(rand[i]>>4)&15];

}

hex_name[40] = '\0';

char buf[64];

assert(strlen(dirname) + 40 + strlen(".txt") < 64);

sprintf(buf, "%s%s.txt", dirname, hex_name);

FILE *fout = fopen(buf, "w");

if (fout) {

out = fout;

}

else {

fprintf(out, "Specialization stats:\n");

}

print_stats(out, &_py_stats_struct);

if (out != stderr) {

fclose(out);

}

#ifdef Py_STATS

#define SPECIALIZATION_FAIL(opcode, kind) \

do { \

if (_py_stats) { \

_py_stats->opcode_stats[opcode].specialization.failure_kinds[kind]++; \

} \

} while (0)

#endif

#ifndef SPECIALIZATION_FAIL

#define SPECIALIZATION_FAIL(opcode, kind) ((void)0)

#endif

// Initialize warmup counters and insert superinstructions. This cannot fail.

void

_PyCode_Quicken(PyCodeObject *code)

{

#if ENABLE_SPECIALIZATION

int opcode = 0;

_Py_CODEUNIT *instructions = _PyCode_CODE(code);

for (int i = 0; i < Py_SIZE(code); i++) {

opcode = _Py_GetBaseOpcode(code, i);

assert(opcode < MIN_INSTRUMENTED_OPCODE);

int caches = _PyOpcode_Caches[opcode];

if (caches) {

instructions[i + 1].cache = adaptive_counter_warmup();

i += caches;

}

#endif /* ENABLE_SPECIALIZATION */

}

#define SIMPLE_FUNCTION 0

/* Common */

#define SPEC_FAIL_OTHER 0

#define SPEC_FAIL_NO_DICT 1

#define SPEC_FAIL_OVERRIDDEN 2

#define SPEC_FAIL_OUT_OF_VERSIONS 3

#define SPEC_FAIL_OUT_OF_RANGE 4

#define SPEC_FAIL_EXPECTED_ERROR 5

#define SPEC_FAIL_WRONG_NUMBER_ARGUMENTS 6

#define SPEC_FAIL_CODE_COMPLEX_PARAMETERS 7

#define SPEC_FAIL_CODE_NOT_OPTIMIZED 8

#define SPEC_FAIL_LOAD_GLOBAL_NON_DICT 17

#define SPEC_FAIL_LOAD_GLOBAL_NON_STRING_OR_SPLIT 18

/* Super */

#define SPEC_FAIL_SUPER_BAD_CLASS 9

#define SPEC_FAIL_SUPER_SHADOWED 10

/* Attributes */

#define SPEC_FAIL_ATTR_OVERRIDING_DESCRIPTOR 9

#define SPEC_FAIL_ATTR_NON_OVERRIDING_DESCRIPTOR 10

#define SPEC_FAIL_ATTR_NOT_DESCRIPTOR 11

#define SPEC_FAIL_ATTR_METHOD 12

#define SPEC_FAIL_ATTR_MUTABLE_CLASS 13

#define SPEC_FAIL_ATTR_PROPERTY 14

#define SPEC_FAIL_ATTR_NON_OBJECT_SLOT 15

#define SPEC_FAIL_ATTR_READ_ONLY 16

#define SPEC_FAIL_ATTR_AUDITED_SLOT 17

#define SPEC_FAIL_ATTR_NOT_MANAGED_DICT 18

#define SPEC_FAIL_ATTR_NON_STRING_OR_SPLIT 19

#define SPEC_FAIL_ATTR_MODULE_ATTR_NOT_FOUND 20

#define SPEC_FAIL_ATTR_SHADOWED 21

#define SPEC_FAIL_ATTR_BUILTIN_CLASS_METHOD 22

#define SPEC_FAIL_ATTR_CLASS_METHOD_OBJ 23

#define SPEC_FAIL_ATTR_OBJECT_SLOT 24

#define SPEC_FAIL_ATTR_HAS_MANAGED_DICT 25

#define SPEC_FAIL_ATTR_INSTANCE_ATTRIBUTE 26

#define SPEC_FAIL_ATTR_METACLASS_ATTRIBUTE 27

#define SPEC_FAIL_ATTR_PROPERTY_NOT_PY_FUNCTION 28

#define SPEC_FAIL_ATTR_NOT_IN_KEYS 29

#define SPEC_FAIL_ATTR_NOT_IN_DICT 30

#define SPEC_FAIL_ATTR_CLASS_ATTR_SIMPLE 31

#define SPEC_FAIL_ATTR_CLASS_ATTR_DESCRIPTOR 32

#define SPEC_FAIL_ATTR_BUILTIN_CLASS_METHOD_OBJ 33

/* Binary subscr and store subscr */

#define SPEC_FAIL_SUBSCR_ARRAY_INT 9

#define SPEC_FAIL_SUBSCR_ARRAY_SLICE 10

#define SPEC_FAIL_SUBSCR_LIST_SLICE 11

#define SPEC_FAIL_SUBSCR_TUPLE_SLICE 12

#define SPEC_FAIL_SUBSCR_STRING_SLICE 14

#define SPEC_FAIL_SUBSCR_BUFFER_INT 15

#define SPEC_FAIL_SUBSCR_BUFFER_SLICE 16

#define SPEC_FAIL_SUBSCR_SEQUENCE_INT 17

/* Store subscr */

#define SPEC_FAIL_SUBSCR_BYTEARRAY_INT 18

#define SPEC_FAIL_SUBSCR_BYTEARRAY_SLICE 19

#define SPEC_FAIL_SUBSCR_PY_SIMPLE 20

#define SPEC_FAIL_SUBSCR_PY_OTHER 21

#define SPEC_FAIL_SUBSCR_DICT_SUBCLASS_NO_OVERRIDE 22

#define SPEC_FAIL_SUBSCR_NOT_HEAP_TYPE 23

/* Binary op */

#define SPEC_FAIL_BINARY_OP_ADD_DIFFERENT_TYPES 9

#define SPEC_FAIL_BINARY_OP_ADD_OTHER 10

#define SPEC_FAIL_BINARY_OP_AND_DIFFERENT_TYPES 11

#define SPEC_FAIL_BINARY_OP_AND_INT 12

#define SPEC_FAIL_BINARY_OP_AND_OTHER 13

#define SPEC_FAIL_BINARY_OP_FLOOR_DIVIDE 14

#define SPEC_FAIL_BINARY_OP_LSHIFT 15

#define SPEC_FAIL_BINARY_OP_MATRIX_MULTIPLY 16

#define SPEC_FAIL_BINARY_OP_MULTIPLY_DIFFERENT_TYPES 17

#define SPEC_FAIL_BINARY_OP_MULTIPLY_OTHER 18

#define SPEC_FAIL_BINARY_OP_OR 19

#define SPEC_FAIL_BINARY_OP_POWER 20

#define SPEC_FAIL_BINARY_OP_REMAINDER 21

#define SPEC_FAIL_BINARY_OP_RSHIFT 22

#define SPEC_FAIL_BINARY_OP_SUBTRACT_DIFFERENT_TYPES 23

#define SPEC_FAIL_BINARY_OP_SUBTRACT_OTHER 24

#define SPEC_FAIL_BINARY_OP_TRUE_DIVIDE_DIFFERENT_TYPES 25

#define SPEC_FAIL_BINARY_OP_TRUE_DIVIDE_FLOAT 26

#define SPEC_FAIL_BINARY_OP_TRUE_DIVIDE_OTHER 27

#define SPEC_FAIL_BINARY_OP_XOR 28

/* Calls */

#define SPEC_FAIL_CALL_INSTANCE_METHOD 11

#define SPEC_FAIL_CALL_CMETHOD 12

#define SPEC_FAIL_CALL_CFUNC_VARARGS 13

#define SPEC_FAIL_CALL_CFUNC_VARARGS_KEYWORDS 14

#define SPEC_FAIL_CALL_CFUNC_NOARGS 15

#define SPEC_FAIL_CALL_CFUNC_METHOD_FASTCALL_KEYWORDS 16

#define SPEC_FAIL_CALL_METH_DESCR_VARARGS 17

#define SPEC_FAIL_CALL_METH_DESCR_VARARGS_KEYWORDS 18

#define SPEC_FAIL_CALL_METH_DESCR_METHOD_FASTCALL_KEYWORDS 19

#define SPEC_FAIL_CALL_BAD_CALL_FLAGS 20

#define SPEC_FAIL_CALL_INIT_NOT_PYTHON 21

#define SPEC_FAIL_CALL_PEP_523 22

#define SPEC_FAIL_CALL_BOUND_METHOD 23

#define SPEC_FAIL_CALL_STR 24

#define SPEC_FAIL_CALL_CLASS_NO_VECTORCALL 25

#define SPEC_FAIL_CALL_CLASS_MUTABLE 26

#define SPEC_FAIL_CALL_KWNAMES 27

#define SPEC_FAIL_CALL_METHOD_WRAPPER 28

#define SPEC_FAIL_CALL_OPERATOR_WRAPPER 29

#define SPEC_FAIL_CALL_INIT_NOT_SIMPLE 30

/* COMPARE_OP */

#define SPEC_FAIL_COMPARE_OP_DIFFERENT_TYPES 12

#define SPEC_FAIL_COMPARE_OP_STRING 13

#define SPEC_FAIL_COMPARE_OP_BIG_INT 14

#define SPEC_FAIL_COMPARE_OP_BYTES 15

#define SPEC_FAIL_COMPARE_OP_TUPLE 16

#define SPEC_FAIL_COMPARE_OP_LIST 17

#define SPEC_FAIL_COMPARE_OP_SET 18

#define SPEC_FAIL_COMPARE_OP_BOOL 19

#define SPEC_FAIL_COMPARE_OP_BASEOBJECT 20

#define SPEC_FAIL_COMPARE_OP_FLOAT_LONG 21

#define SPEC_FAIL_COMPARE_OP_LONG_FLOAT 22

/* FOR_ITER and SEND */

#define SPEC_FAIL_ITER_GENERATOR 10

#define SPEC_FAIL_ITER_COROUTINE 11

#define SPEC_FAIL_ITER_ASYNC_GENERATOR 12

#define SPEC_FAIL_ITER_LIST 13

#define SPEC_FAIL_ITER_TUPLE 14

#define SPEC_FAIL_ITER_SET 15

#define SPEC_FAIL_ITER_STRING 16

#define SPEC_FAIL_ITER_BYTES 17

#define SPEC_FAIL_ITER_RANGE 18

#define SPEC_FAIL_ITER_ITERTOOLS 19

#define SPEC_FAIL_ITER_DICT_KEYS 20

#define SPEC_FAIL_ITER_DICT_ITEMS 21

#define SPEC_FAIL_ITER_DICT_VALUES 22

#define SPEC_FAIL_ITER_ENUMERATE 23

#define SPEC_FAIL_ITER_MAP 24

#define SPEC_FAIL_ITER_ZIP 25

#define SPEC_FAIL_ITER_SEQ_ITER 26

#define SPEC_FAIL_ITER_REVERSED_LIST 27

#define SPEC_FAIL_ITER_CALLABLE 28

#define SPEC_FAIL_ITER_ASCII_STRING 29

#define SPEC_FAIL_ITER_ASYNC_GENERATOR_SEND 30

// UNPACK_SEQUENCE

#define SPEC_FAIL_UNPACK_SEQUENCE_ITERATOR 9

#define SPEC_FAIL_UNPACK_SEQUENCE_SEQUENCE 10

// TO_BOOL

#define SPEC_FAIL_TO_BOOL_BYTEARRAY 9

#define SPEC_FAIL_TO_BOOL_BYTES 10

#define SPEC_FAIL_TO_BOOL_DICT 11

#define SPEC_FAIL_TO_BOOL_FLOAT 12

#define SPEC_FAIL_TO_BOOL_MAPPING 13

#define SPEC_FAIL_TO_BOOL_MEMORY_VIEW 14

#define SPEC_FAIL_TO_BOOL_NUMBER 15

#define SPEC_FAIL_TO_BOOL_SEQUENCE 16

#define SPEC_FAIL_TO_BOOL_SET 17

#define SPEC_FAIL_TO_BOOL_TUPLE 18

static int function_kind(PyCodeObject *code);

static bool function_check_args(PyObject *o, int expected_argcount, int opcode);

static uint32_t function_get_version(PyObject *o, int opcode);

static int

specialize_module_load_attr(

PyObject *owner, _Py_CODEUNIT *instr, PyObject *name

) {

_PyAttrCache *cache = (_PyAttrCache *)(instr + 1);

PyModuleObject *m = (PyModuleObject *)owner;

assert((owner->ob_type->tp_flags & Py_TPFLAGS_MANAGED_DICT) == 0);

PyDictObject *dict = (PyDictObject *)m->md_dict;

if (dict == NULL) {

SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_NO_DICT);

return -1;

}

if (dict->ma_keys->dk_kind != DICT_KEYS_UNICODE) {

SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_ATTR_NON_STRING_OR_SPLIT);

return -1;

}

Py_ssize_t index = _PyDict_LookupIndex(dict, &_Py_ID(__getattr__));

assert(index != DKIX_ERROR);

if (index != DKIX_EMPTY) {

SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_ATTR_MODULE_ATTR_NOT_FOUND);

return -1;

}

index = _PyDict_LookupIndex(dict, name);

assert (index != DKIX_ERROR);

if (index != (uint16_t)index) {

SPECIALIZATION_FAIL(LOAD_ATTR,

index == DKIX_EMPTY ?

SPEC_FAIL_ATTR_MODULE_ATTR_NOT_FOUND :

SPEC_FAIL_OUT_OF_RANGE);

return -1;

}

uint32_t keys_version = _PyDictKeys_GetVersionForCurrentState(

_PyInterpreterState_GET(), dict->ma_keys);

if (keys_version == 0) {

SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_OUT_OF_VERSIONS);

return -1;

}

write_u32(cache->version, keys_version);

cache->index = (uint16_t)index;

instr->op.code = LOAD_ATTR_MODULE;

return 0;

}

/* Attribute specialization */

void

_Py_Specialize_LoadSuperAttr(PyObject *global_super, PyObject *cls, _Py_CODEUNIT *instr, int load_method) {

assert(ENABLE_SPECIALIZATION);

assert(_PyOpcode_Caches[LOAD_SUPER_ATTR] == INLINE_CACHE_ENTRIES_LOAD_SUPER_ATTR);

_PySuperAttrCache *cache = (_PySuperAttrCache *)(instr + 1);

if (global_super != (PyObject *)&PySuper_Type) {

SPECIALIZATION_FAIL(LOAD_SUPER_ATTR, SPEC_FAIL_SUPER_SHADOWED);

goto fail;

}

if (!PyType_Check(cls)) {

SPECIALIZATION_FAIL(LOAD_SUPER_ATTR, SPEC_FAIL_SUPER_BAD_CLASS);

goto fail;

}

instr->op.code = load_method ? LOAD_SUPER_ATTR_METHOD : LOAD_SUPER_ATTR_ATTR;

goto success;

fail:

STAT_INC(LOAD_SUPER_ATTR, failure);

assert(!PyErr_Occurred());

instr->op.code = LOAD_SUPER_ATTR;

cache->counter = adaptive_counter_backoff(cache->counter);

return;

success:

STAT_INC(LOAD_SUPER_ATTR, success);

assert(!PyErr_Occurred());

cache->counter = adaptive_counter_cooldown();

}

typedef enum {

OVERRIDING, /* Is an overriding descriptor, and will remain so. */

METHOD, /* Attribute has Py_TPFLAGS_METHOD_DESCRIPTOR set */

PROPERTY, /* Is a property */

OBJECT_SLOT, /* Is an object slot descriptor */

OTHER_SLOT, /* Is a slot descriptor of another type */

NON_OVERRIDING, /* Is another non-overriding descriptor, and is an instance of an immutable class*/

BUILTIN_CLASSMETHOD, /* Builtin methods with METH_CLASS */

PYTHON_CLASSMETHOD, /* Python classmethod(func) object */

NON_DESCRIPTOR, /* Is not a descriptor, and is an instance of an immutable class */

MUTABLE, /* Instance of a mutable class; might, or might not, be a descriptor */

ABSENT, /* Attribute is not present on the class */

DUNDER_CLASS, /* __class__ attribute */

GETSET_OVERRIDDEN, /* __getattribute__ or __setattr__ has been overridden */

GETATTRIBUTE_IS_PYTHON_FUNCTION /* Descriptor requires calling a Python __getattribute__ */

} DescriptorClassification;

static DescriptorClassification

analyze_descriptor(PyTypeObject *type, PyObject *name, PyObject **descr, int store)

{

bool has_getattr = false;

if (store) {

if (type->tp_setattro != PyObject_GenericSetAttr) {

*descr = NULL;

return GETSET_OVERRIDDEN;

}

else {

getattrofunc getattro_slot = type->tp_getattro;

if (getattro_slot == PyObject_GenericGetAttr) {

/* Normal attribute lookup; */

has_getattr = false;

}

else if (getattro_slot == _Py_slot_tp_getattr_hook ||

getattro_slot == _Py_slot_tp_getattro) {

/* One or both of __getattribute__ or __getattr__ may have been

overridden See typeobject.c for why these functions are special. */

PyObject *getattribute = _PyType_Lookup(type,

&_Py_ID(__getattribute__));

PyInterpreterState *interp = _PyInterpreterState_GET();

bool has_custom_getattribute = getattribute != NULL &&

getattribute != interp->callable_cache.object__getattribute__;

has_getattr = _PyType_Lookup(type, &_Py_ID(__getattr__)) != NULL;

if (has_custom_getattribute) {

if (getattro_slot == _Py_slot_tp_getattro &&

!has_getattr &&

Py_IS_TYPE(getattribute, &PyFunction_Type)) {

*descr = getattribute;

return GETATTRIBUTE_IS_PYTHON_FUNCTION;

}

/* Potentially both __getattr__ and __getattribute__ are set.

Too complicated */

*descr = NULL;

return GETSET_OVERRIDDEN;

}

/* Potentially has __getattr__ but no custom __getattribute__.

Fall through to usual descriptor analysis.

Usual attribute lookup should only be allowed at runtime

if we can guarantee that there is no way an exception can be

raised. This means some specializations, e.g. specializing

for property() isn't safe.

}

else {

*descr = NULL;

return GETSET_OVERRIDDEN;

}

PyObject *descriptor = _PyType_Lookup(type, name);

*descr = descriptor;

if (descriptor == NULL) {

return ABSENT;

}

PyTypeObject *desc_cls = Py_TYPE(descriptor);

if (!(desc_cls->tp_flags & Py_TPFLAGS_IMMUTABLETYPE)) {

return MUTABLE;

}

if (desc_cls->tp_descr_set) {

if (desc_cls == &PyMemberDescr_Type) {

PyMemberDescrObject *member = (PyMemberDescrObject *)descriptor;

struct PyMemberDef *dmem = member->d_member;

if (dmem->type == Py_T_OBJECT_EX) {

return OBJECT_SLOT;

}

return OTHER_SLOT;

}

if (desc_cls == &PyProperty_Type) {

/* We can't detect at runtime whether an attribute exists

with property. So that means we may have to call

__getattr__. */

return has_getattr ? GETSET_OVERRIDDEN : PROPERTY;

}

if (PyUnicode_CompareWithASCIIString(name, "__class__") == 0) {

if (descriptor == _PyType_Lookup(&PyBaseObject_Type, name)) {

return DUNDER_CLASS;

}

if (store) {

return OVERRIDING;

}

if (desc_cls->tp_descr_get) {

if (desc_cls->tp_flags & Py_TPFLAGS_METHOD_DESCRIPTOR) {

return METHOD;

}

if (Py_IS_TYPE(descriptor, &PyClassMethodDescr_Type)) {

return BUILTIN_CLASSMETHOD;

}

if (Py_IS_TYPE(descriptor, &PyClassMethod_Type)) {

return PYTHON_CLASSMETHOD;

}

return NON_OVERRIDING;

}

return NON_DESCRIPTOR;

}

static int

specialize_dict_access(

PyObject *owner, _Py_CODEUNIT *instr, PyTypeObject *type,

DescriptorClassification kind, PyObject *name,

int base_op, int values_op, int hint_op)

{

assert(kind == NON_OVERRIDING || kind == NON_DESCRIPTOR || kind == ABSENT ||

kind == BUILTIN_CLASSMETHOD || kind == PYTHON_CLASSMETHOD);

// No descriptor, or non overriding.

if ((type->tp_flags & Py_TPFLAGS_MANAGED_DICT) == 0) {

SPECIALIZATION_FAIL(base_op, SPEC_FAIL_ATTR_NOT_MANAGED_DICT);

return 0;

}

_PyAttrCache *cache = (_PyAttrCache *)(instr + 1);

PyDictOrValues *dorv = _PyObject_DictOrValuesPointer(owner);

if (_PyDictOrValues_IsValues(*dorv) ||

_PyObject_MakeInstanceAttributesFromDict(owner, dorv))

{

// Virtual dictionary

PyDictKeysObject *keys = ((PyHeapTypeObject *)type)->ht_cached_keys;

assert(PyUnicode_CheckExact(name));

Py_ssize_t index = _PyDictKeys_StringLookup(keys, name);

assert (index != DKIX_ERROR);

if (index != (uint16_t)index) {

SPECIALIZATION_FAIL(base_op,

index == DKIX_EMPTY ?

SPEC_FAIL_ATTR_NOT_IN_KEYS :

SPEC_FAIL_OUT_OF_RANGE);

return 0;

}

write_u32(cache->version, type->tp_version_tag);

cache->index = (uint16_t)index;

instr->op.code = values_op;

}

else {

PyDictObject *dict = (PyDictObject *)_PyDictOrValues_GetDict(*dorv);

if (dict == NULL || !PyDict_CheckExact(dict)) {

SPECIALIZATION_FAIL(base_op, SPEC_FAIL_NO_DICT);

return 0;

}

// We found an instance with a __dict__.

if (dict->ma_values) {

SPECIALIZATION_FAIL(base_op, SPEC_FAIL_ATTR_NON_STRING_OR_SPLIT);

return 0;

}

Py_ssize_t index =

_PyDict_LookupIndex(dict, name);

if (index != (uint16_t)index) {

SPECIALIZATION_FAIL(base_op,

index == DKIX_EMPTY ?

SPEC_FAIL_ATTR_NOT_IN_DICT :

SPEC_FAIL_OUT_OF_RANGE);

return 0;

}

cache->index = (uint16_t)index;

write_u32(cache->version, type->tp_version_tag);

instr->op.code = hint_op;

}

return 1;

}

static int specialize_attr_loadclassattr(PyObject* owner, _Py_CODEUNIT* instr, PyObject* name,

PyObject* descr, DescriptorClassification kind, bool is_method);

static int specialize_class_load_attr(PyObject* owner, _Py_CODEUNIT* instr, PyObject* name);

void

_Py_Specialize_LoadAttr(PyObject *owner, _Py_CODEUNIT *instr, PyObject *name)

{

assert(ENABLE_SPECIALIZATION);

assert(_PyOpcode_Caches[LOAD_ATTR] == INLINE_CACHE_ENTRIES_LOAD_ATTR);

_PyAttrCache *cache = (_PyAttrCache *)(instr + 1);

PyTypeObject *type = Py_TYPE(owner);

if (!_PyType_IsReady(type)) {

// We *might* not really need this check, but we inherited it from

// PyObject_GenericGetAttr and friends... and this way we still do the

// right thing if someone forgets to call PyType_Ready(type):

SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_OTHER);

goto fail;

}

if (PyModule_CheckExact(owner)) {

if (specialize_module_load_attr(owner, instr, name))

{

goto fail;

}

goto success;

}

if (PyType_Check(owner)) {

if (specialize_class_load_attr(owner, instr, name)) {

goto fail;

}

goto success;

}

PyObject *descr = NULL;

DescriptorClassification kind = analyze_descriptor(type, name, &descr, 0);

assert(descr != NULL || kind == ABSENT || kind == GETSET_OVERRIDDEN);

switch(kind) {

case OVERRIDING:

SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_ATTR_OVERRIDING_DESCRIPTOR);

goto fail;

case METHOD:

{

int oparg = instr->op.arg;

if (oparg & 1) {

if (specialize_attr_loadclassattr(owner, instr, name, descr, kind, true)) {

goto success;

}

else {

SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_ATTR_METHOD);

}

goto fail;

}

case PROPERTY:

{

_PyLoadMethodCache *lm_cache = (_PyLoadMethodCache *)(instr + 1);

assert(Py_TYPE(descr) == &PyProperty_Type);

PyObject *fget = ((_PyPropertyObject *)descr)->prop_get;

if (fget == NULL) {

SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_EXPECTED_ERROR);

goto fail;

}

if (!Py_IS_TYPE(fget, &PyFunction_Type)) {

SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_ATTR_PROPERTY_NOT_PY_FUNCTION);

goto fail;

}

if (!function_check_args(fget, 1, LOAD_ATTR)) {

goto fail;

}

if (instr->op.arg & 1) {

SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_ATTR_METHOD);

goto fail;

}

uint32_t version = function_get_version(fget, LOAD_ATTR);

if (version == 0) {

goto fail;

}

if (_PyInterpreterState_GET()->eval_frame) {

SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_OTHER);

goto fail;

}

write_u32(lm_cache->keys_version, version);

assert(type->tp_version_tag != 0);

write_u32(lm_cache->type_version, type->tp_version_tag);

/* borrowed */

write_obj(lm_cache->descr, fget);

instr->op.code = LOAD_ATTR_PROPERTY;

goto success;

}

case OBJECT_SLOT:

{

PyMemberDescrObject *member = (PyMemberDescrObject *)descr;

struct PyMemberDef *dmem = member->d_member;

Py_ssize_t offset = dmem->offset;

if (!PyObject_TypeCheck(owner, member->d_common.d_type)) {

SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_EXPECTED_ERROR);

goto fail;

}

if (dmem->flags & Py_AUDIT_READ) {

SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_ATTR_AUDITED_SLOT);

goto fail;

}

if (offset != (uint16_t)offset) {

SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_OUT_OF_RANGE);

goto fail;

}

assert(dmem->type == Py_T_OBJECT_EX);

assert(offset > 0);

cache->index = (uint16_t)offset;

write_u32(cache->version, type->tp_version_tag);

instr->op.code = LOAD_ATTR_SLOT;

goto success;

}

case DUNDER_CLASS:

{

Py_ssize_t offset = offsetof(PyObject, ob_type);

assert(offset == (uint16_t)offset);

cache->index = (uint16_t)offset;

write_u32(cache->version, type->tp_version_tag);

instr->op.code = LOAD_ATTR_SLOT;

goto success;

}

case OTHER_SLOT:

SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_ATTR_NON_OBJECT_SLOT);

goto fail;

case MUTABLE:

SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_ATTR_MUTABLE_CLASS);

goto fail;

case GETSET_OVERRIDDEN:

SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_OVERRIDDEN);

goto fail;

case GETATTRIBUTE_IS_PYTHON_FUNCTION:

{

assert(type->tp_getattro == _Py_slot_tp_getattro);

assert(Py_IS_TYPE(descr, &PyFunction_Type));

_PyLoadMethodCache *lm_cache = (_PyLoadMethodCache *)(instr + 1);

if (!function_check_args(descr, 2, LOAD_ATTR)) {

goto fail;

}

if (instr->op.arg & 1) {

SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_ATTR_METHOD);

goto fail;

}

uint32_t version = function_get_version(descr, LOAD_ATTR);

if (version == 0) {

goto fail;

}

if (_PyInterpreterState_GET()->eval_frame) {

SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_OTHER);

goto fail;

}

write_u32(lm_cache->keys_version, version);

/* borrowed */

write_obj(lm_cache->descr, descr);

write_u32(lm_cache->type_version, type->tp_version_tag);

instr->op.code = LOAD_ATTR_GETATTRIBUTE_OVERRIDDEN;

goto success;

}

case BUILTIN_CLASSMETHOD:

SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_ATTR_BUILTIN_CLASS_METHOD_OBJ);

goto fail;

case PYTHON_CLASSMETHOD:

SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_ATTR_CLASS_METHOD_OBJ);

goto fail;

case NON_OVERRIDING:

SPECIALIZATION_FAIL(LOAD_ATTR,

(type->tp_flags & Py_TPFLAGS_MANAGED_DICT) ?

SPEC_FAIL_ATTR_CLASS_ATTR_DESCRIPTOR :

SPEC_FAIL_ATTR_NOT_MANAGED_DICT);

goto fail;

case NON_DESCRIPTOR:

if ((instr->op.arg & 1) == 0) {

if (specialize_attr_loadclassattr(owner, instr, name, descr, kind, false)) {

goto success;

}

else {

SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_ATTR_CLASS_ATTR_SIMPLE);

}

goto fail;

case ABSENT:

if (specialize_dict_access(owner, instr, type, kind, name, LOAD_ATTR,

LOAD_ATTR_INSTANCE_VALUE, LOAD_ATTR_WITH_HINT))

{

goto success;

}

fail:

STAT_INC(LOAD_ATTR, failure);

assert(!PyErr_Occurred());

instr->op.code = LOAD_ATTR;

cache->counter = adaptive_counter_backoff(cache->counter);

return;

success:

STAT_INC(LOAD_ATTR, success);

assert(!PyErr_Occurred());

cache->counter = adaptive_counter_cooldown();

}

void

_Py_Specialize_StoreAttr(PyObject *owner, _Py_CODEUNIT *instr, PyObject *name)

{

assert(ENABLE_SPECIALIZATION);

assert(_PyOpcode_Caches[STORE_ATTR] == INLINE_CACHE_ENTRIES_STORE_ATTR);

_PyAttrCache *cache = (_PyAttrCache *)(instr + 1);

PyTypeObject *type = Py_TYPE(owner);

if (!_PyType_IsReady(type)) {

// We *might* not really need this check, but we inherited it from

// PyObject_GenericSetAttr and friends... and this way we still do the

// right thing if someone forgets to call PyType_Ready(type):

SPECIALIZATION_FAIL(STORE_ATTR, SPEC_FAIL_OTHER);

goto fail;

}

if (PyModule_CheckExact(owner)) {

SPECIALIZATION_FAIL(STORE_ATTR, SPEC_FAIL_OVERRIDDEN);

goto fail;

}

PyObject *descr;

DescriptorClassification kind = analyze_descriptor(type, name, &descr, 1);

switch(kind) {

case OVERRIDING:

SPECIALIZATION_FAIL(STORE_ATTR, SPEC_FAIL_ATTR_OVERRIDING_DESCRIPTOR);

goto fail;

case METHOD:

SPECIALIZATION_FAIL(STORE_ATTR, SPEC_FAIL_ATTR_METHOD);

goto fail;

case PROPERTY:

SPECIALIZATION_FAIL(STORE_ATTR, SPEC_FAIL_ATTR_PROPERTY);

goto fail;

case OBJECT_SLOT:

{

PyMemberDescrObject *member = (PyMemberDescrObject *)descr;

struct PyMemberDef *dmem = member->d_member;

Py_ssize_t offset = dmem->offset;

if (!PyObject_TypeCheck(owner, member->d_common.d_type)) {

SPECIALIZATION_FAIL(STORE_ATTR, SPEC_FAIL_EXPECTED_ERROR);

goto fail;

}

if (dmem->flags & Py_READONLY) {

SPECIALIZATION_FAIL(STORE_ATTR, SPEC_FAIL_ATTR_READ_ONLY);

goto fail;

}

if (offset != (uint16_t)offset) {

SPECIALIZATION_FAIL(STORE_ATTR, SPEC_FAIL_OUT_OF_RANGE);

goto fail;

}

assert(dmem->type == Py_T_OBJECT_EX);

assert(offset > 0);

cache->index = (uint16_t)offset;

write_u32(cache->version, type->tp_version_tag);

instr->op.code = STORE_ATTR_SLOT;

goto success;

}

case DUNDER_CLASS:

case OTHER_SLOT:

SPECIALIZATION_FAIL(STORE_ATTR, SPEC_FAIL_ATTR_NON_OBJECT_SLOT);

goto fail;

case MUTABLE:

SPECIALIZATION_FAIL(STORE_ATTR, SPEC_FAIL_ATTR_MUTABLE_CLASS);

goto fail;

case GETATTRIBUTE_IS_PYTHON_FUNCTION:

case GETSET_OVERRIDDEN:

SPECIALIZATION_FAIL(STORE_ATTR, SPEC_FAIL_OVERRIDDEN);

goto fail;

case BUILTIN_CLASSMETHOD:

SPECIALIZATION_FAIL(STORE_ATTR, SPEC_FAIL_ATTR_BUILTIN_CLASS_METHOD_OBJ);

goto fail;

View remainder of file in raw view

cpython/Python/specialize.c at 61c7249759ce88465ea655d5c19d17d03ff3f74b · python/cpython · GitHub

Uh oh!

Expand file tree

Breadcrumbs

specialize.c

Latest commit

History

Breadcrumbs

specialize.c

File metadata and controls