source: src/Concurrency/Keywords.cc@ aac99da

ADT aaron-thesis arm-eh ast-experimental cleanup-dtors enum forall-pointer-decay jacob/cs343-translation jenkins-sandbox new-ast new-ast-unique-expr persistent-indexer pthread-emulation qualifiedEnum
Last change on this file since aac99da was 2bf7ef6, checked in by Thierry Delisle <tdelisle@…>, 7 years ago

Small changes to comments in Keywords.cc
  • Property mode set to 100644
File size: 22.1 KB
Line 
1//
2// Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// Keywords.cc --
8//
9// Author : Thierry Delisle
10// Created On : Mon Mar 13 12:41:22 2017
11// Last Modified By :
12// Last Modified On :
13// Update Count : 5
14//
15
16#include "Concurrency/Keywords.h"
17
18#include <cassert> // for assert
19#include <string> // for string, operator==
20
21#include "Common/PassVisitor.h" // for PassVisitor
22#include "Common/SemanticError.h" // for SemanticError
23#include "Common/utility.h" // for deleteAll, map_range
24#include "CodeGen/OperatorTable.h" // for isConstructor
25#include "InitTweak/InitTweak.h" // for getPointerBase
26#include "Parser/LinkageSpec.h" // for Cforall
27#include "SynTree/Constant.h" // for Constant
28#include "SynTree/Declaration.h" // for StructDecl, FunctionDecl, ObjectDecl
29#include "SynTree/Expression.h" // for VariableExpr, ConstantExpr, Untype...
30#include "SynTree/Initializer.h" // for SingleInit, ListInit, Initializer ...
31#include "SynTree/Label.h" // for Label
32#include "SynTree/Statement.h" // for CompoundStmt, DeclStmt, ExprStmt
33#include "SynTree/Type.h" // for StructInstType, Type, PointerType
34#include "SynTree/Visitor.h" // for Visitor, acceptAll
35
36class Attribute;
37
38namespace Concurrency {
39 //=============================================================================================
40 // Pass declarations
41 //=============================================================================================
42
43 //-----------------------------------------------------------------------------
44 //Handles sue type declarations :
45 // sue MyType { struct MyType {
46 // int data; int data;
47 // a_struct_t more_data; a_struct_t more_data;
48 // => NewField_t newField;
49 // }; };
50 // static inline NewField_t * getter_name( MyType * this ) { return &this->newField; }
51 //
52 class ConcurrentSueKeyword : public WithDeclsToAdd {
53 public:
54
55 ConcurrentSueKeyword( std::string&& type_name, std::string&& field_name, std::string&& getter_name, std::string&& context_error, bool needs_main, KeywordCastExpr::Target cast_target ) :
56 type_name( type_name ), field_name( field_name ), getter_name( getter_name ), context_error( context_error ), needs_main( needs_main ), cast_target( cast_target ) {}
57
58 virtual ~ConcurrentSueKeyword() {}
59
60 Declaration * postmutate( StructDecl * decl );
61
62 void handle( StructDecl * );
63 FunctionDecl * forwardDeclare( StructDecl * );
64 ObjectDecl * addField( StructDecl * );
65 void addRoutines( ObjectDecl *, FunctionDecl * );
66
67 virtual bool is_target( StructDecl * decl ) = 0;
68
69 Expression * postmutate( KeywordCastExpr * cast );
70
71 private:
72 const std::string type_name;
73 const std::string field_name;
74 const std::string getter_name;
75 const std::string context_error;
76 bool needs_main;
77 KeywordCastExpr::Target cast_target;
78
79 StructDecl* type_decl = nullptr;
80 };
81
82
83 //-----------------------------------------------------------------------------
84 //Handles thread type declarations :
85 // thread Mythread { struct MyThread {
86 // int data; int data;
87 // a_struct_t more_data; a_struct_t more_data;
88 // => thread_desc __thrd_d;
89 // }; };
90 // static inline thread_desc * get_thread( MyThread * this ) { return &this->__thrd_d; }
91 //
92 class ThreadKeyword final : public ConcurrentSueKeyword {
93 public:
94
95 ThreadKeyword() : ConcurrentSueKeyword(
96 "thread_desc",
97 "__thrd",
98 "get_thread",
99 "thread keyword requires threads to be in scope, add #include <thread.hfa>",
100 true,
101 KeywordCastExpr::Thread
102 )
103 {}
104
105 virtual ~ThreadKeyword() {}
106
107 virtual bool is_target( StructDecl * decl ) override final { return decl->is_thread(); }
108
109 static void implement( std::list< Declaration * > & translationUnit ) {
110 PassVisitor< ThreadKeyword > impl;
111 mutateAll( translationUnit, impl );
112 }
113 };
114
115 //-----------------------------------------------------------------------------
116 //Handles coroutine type declarations :
117 // coroutine MyCoroutine { struct MyCoroutine {
118 // int data; int data;
119 // a_struct_t more_data; a_struct_t more_data;
120 // => coroutine_desc __cor_d;
121 // }; };
122 // static inline coroutine_desc * get_coroutine( MyCoroutine * this ) { return &this->__cor_d; }
123 //
124 class CoroutineKeyword final : public ConcurrentSueKeyword {
125 public:
126
127 CoroutineKeyword() : ConcurrentSueKeyword(
128 "coroutine_desc",
129 "__cor",
130 "get_coroutine",
131 "coroutine keyword requires coroutines to be in scope, add #include <coroutine.hfa>",
132 true,
133 KeywordCastExpr::Coroutine
134 )
135 {}
136
137 virtual ~CoroutineKeyword() {}
138
139 virtual bool is_target( StructDecl * decl ) override final { return decl->is_coroutine(); }
140
141 static void implement( std::list< Declaration * > & translationUnit ) {
142 PassVisitor< CoroutineKeyword > impl;
143 mutateAll( translationUnit, impl );
144 }
145 };
146
147 //-----------------------------------------------------------------------------
148 //Handles monitor type declarations :
149 // monitor MyMonitor { struct MyMonitor {
150 // int data; int data;
151 // a_struct_t more_data; a_struct_t more_data;
152 // => monitor_desc __mon_d;
153 // }; };
154 // static inline monitor_desc * get_coroutine( MyMonitor * this ) { return &this->__cor_d; }
155 //
156 class MonitorKeyword final : public ConcurrentSueKeyword {
157 public:
158
159 MonitorKeyword() : ConcurrentSueKeyword(
160 "monitor_desc",
161 "__mon",
162 "get_monitor",
163 "monitor keyword requires monitors to be in scope, add #include <monitor.hfa>",
164 false,
165 KeywordCastExpr::Monitor
166 )
167 {}
168
169 virtual ~MonitorKeyword() {}
170
171 virtual bool is_target( StructDecl * decl ) override final { return decl->is_monitor(); }
172
173 static void implement( std::list< Declaration * > & translationUnit ) {
174 PassVisitor< MonitorKeyword > impl;
175 mutateAll( translationUnit, impl );
176 }
177 };
178
179 //-----------------------------------------------------------------------------
180 //Handles mutex routines definitions :
181 // void foo( A * mutex a, B * mutex b, int i ) { void foo( A * a, B * b, int i ) {
182 // monitor_desc * __monitors[] = { get_monitor(a), get_monitor(b) };
183 // monitor_guard_t __guard = { __monitors, 2 };
184 // /*Some code*/ => /*Some code*/
185 // } }
186 //
187 class MutexKeyword final {
188 public:
189
190 void postvisit( FunctionDecl * decl );
191 void postvisit( StructDecl * decl );
192
193 std::list<DeclarationWithType*> findMutexArgs( FunctionDecl*, bool & first );
194 void validate( DeclarationWithType * );
195 void addDtorStatments( FunctionDecl* func, CompoundStmt *, const std::list<DeclarationWithType * > &);
196 void addStatments( FunctionDecl* func, CompoundStmt *, const std::list<DeclarationWithType * > &);
197
198 static void implement( std::list< Declaration * > & translationUnit ) {
199 PassVisitor< MutexKeyword > impl;
200 acceptAll( translationUnit, impl );
201 }
202
203 private:
204 StructDecl* monitor_decl = nullptr;
205 StructDecl* guard_decl = nullptr;
206 StructDecl* dtor_guard_decl = nullptr;
207
208 static std::unique_ptr< Type > generic_func;
209 };
210
211 std::unique_ptr< Type > MutexKeyword::generic_func = std::unique_ptr< Type >(
212 new FunctionType(
213 noQualifiers,
214 true
215 )
216 );
217
218 //-----------------------------------------------------------------------------
219 //Handles mutex routines definitions :
220 // void foo( A * mutex a, B * mutex b, int i ) { void foo( A * a, B * b, int i ) {
221 // monitor_desc * __monitors[] = { get_monitor(a), get_monitor(b) };
222 // monitor_guard_t __guard = { __monitors, 2 };
223 // /*Some code*/ => /*Some code*/
224 // } }
225 //
226 class ThreadStarter final {
227 public:
228
229 void postvisit( FunctionDecl * decl );
230 void previsit ( StructDecl * decl );
231
232 void addStartStatement( FunctionDecl * decl, DeclarationWithType * param );
233
234 static void implement( std::list< Declaration * > & translationUnit ) {
235 PassVisitor< ThreadStarter > impl;
236 acceptAll( translationUnit, impl );
237 }
238
239 private :
240 bool thread_ctor_seen = false;
241 StructDecl * thread_decl = nullptr;
242 };
243
244 //=============================================================================================
245 // General entry routine
246 //=============================================================================================
247 void applyKeywords( std::list< Declaration * > & translationUnit ) {
248 ThreadKeyword ::implement( translationUnit );
249 CoroutineKeyword ::implement( translationUnit );
250 MonitorKeyword ::implement( translationUnit );
251 }
252
253 void implementMutexFuncs( std::list< Declaration * > & translationUnit ) {
254 MutexKeyword ::implement( translationUnit );
255 }
256
257 void implementThreadStarter( std::list< Declaration * > & translationUnit ) {
258 ThreadStarter ::implement( translationUnit );
259 }
260
261 //=============================================================================================
262 // Generic keyword implementation
263 //=============================================================================================
264 void fixupGenerics(FunctionType * func, StructDecl * decl) {
265 cloneAll(decl->parameters, func->forall);
266 for ( TypeDecl * td : func->forall ) {
267 strict_dynamic_cast<StructInstType*>(
268 func->parameters.front()->get_type()->stripReferences()
269 )->parameters.push_back(
270 new TypeExpr( new TypeInstType( noQualifiers, td->name, td ) )
271 );
272 }
273 }
274
275 Declaration * ConcurrentSueKeyword::postmutate(StructDecl * decl) {
276 if( decl->name == type_name && decl->body ) {
277 assert( !type_decl );
278 type_decl = decl;
279 }
280 else if ( is_target(decl) ) {
281 handle( decl );
282 }
283 return decl;
284 }
285
286 Expression * ConcurrentSueKeyword::postmutate( KeywordCastExpr * cast ) {
287 if ( cast_target == cast->target ) {
288 // convert (thread &)t to (thread_desc &)*get_thread(t), etc.
289 if( !type_decl ) SemanticError( cast, context_error );
290 Expression * arg = cast->arg;
291 cast->arg = nullptr;
292 delete cast;
293 return new CastExpr(
294 UntypedExpr::createDeref(
295 new UntypedExpr( new NameExpr( getter_name ), { arg } )
296 ),
297 new ReferenceType(
298 noQualifiers,
299 new StructInstType( noQualifiers, type_decl ) )
300 );
301 }
302 return cast;
303 }
304
305
306 void ConcurrentSueKeyword::handle( StructDecl * decl ) {
307 if( ! decl->body ) return;
308
309 if( !type_decl ) SemanticError( decl, context_error );
310
311 FunctionDecl * func = forwardDeclare( decl );
312 ObjectDecl * field = addField( decl );
313 addRoutines( field, func );
314 }
315
316 FunctionDecl * ConcurrentSueKeyword::forwardDeclare( StructDecl * decl ) {
317
318 StructDecl * forward = decl->clone();
319 forward->set_body( false );
320 deleteAll( forward->get_members() );
321 forward->get_members().clear();
322
323 FunctionType * get_type = new FunctionType( noQualifiers, false );
324 ObjectDecl * this_decl = new ObjectDecl(
325 "this",
326 noStorageClasses,
327 LinkageSpec::Cforall,
328 nullptr,
329 new ReferenceType(
330 noQualifiers,
331 new StructInstType(
332 noQualifiers,
333 decl
334 )
335 ),
336 nullptr
337 );
338
339 get_type->get_parameters().push_back( this_decl->clone() );
340 get_type->get_returnVals().push_back(
341 new ObjectDecl(
342 "ret",
343 noStorageClasses,
344 LinkageSpec::Cforall,
345 nullptr,
346 new PointerType(
347 noQualifiers,
348 new StructInstType(
349 noQualifiers,
350 type_decl
351 )
352 ),
353 nullptr
354 )
355 );
356 fixupGenerics(get_type, decl);
357
358 FunctionDecl * get_decl = new FunctionDecl(
359 getter_name,
360 Type::Static,
361 LinkageSpec::Cforall,
362 get_type,
363 nullptr,
364 noAttributes,
365 Type::Inline
366 );
367
368 FunctionDecl * main_decl = nullptr;
369
370 if( needs_main ) {
371 FunctionType * main_type = new FunctionType( noQualifiers, false );
372
373 main_type->get_parameters().push_back( this_decl->clone() );
374
375 main_decl = new FunctionDecl(
376 "main",
377 noStorageClasses,
378 LinkageSpec::Cforall,
379 main_type,
380 nullptr
381 );
382 fixupGenerics(main_type, decl);
383 }
384
385 delete this_decl;
386
387 declsToAddBefore.push_back( forward );
388 if( needs_main ) declsToAddBefore.push_back( main_decl );
389 declsToAddBefore.push_back( get_decl );
390
391 return get_decl;
392 }
393
394 ObjectDecl * ConcurrentSueKeyword::addField( StructDecl * decl ) {
395 ObjectDecl * field = new ObjectDecl(
396 field_name,
397 noStorageClasses,
398 LinkageSpec::Cforall,
399 nullptr,
400 new StructInstType(
401 noQualifiers,
402 type_decl
403 ),
404 nullptr
405 );
406
407 decl->get_members().push_back( field );
408
409 return field;
410 }
411
412 void ConcurrentSueKeyword::addRoutines( ObjectDecl * field, FunctionDecl * func ) {
413 CompoundStmt * statement = new CompoundStmt();
414 statement->push_back(
415 new ReturnStmt(
416 new AddressExpr(
417 new MemberExpr(
418 field,
419 new CastExpr(
420 new VariableExpr( func->get_functionType()->get_parameters().front() ),
421 func->get_functionType()->get_parameters().front()->get_type()->stripReferences()->clone()
422 )
423 )
424 )
425 )
426 );
427
428 FunctionDecl * get_decl = func->clone();
429
430 get_decl->set_statements( statement );
431
432 declsToAddAfter.push_back( get_decl );
433
434 // get_decl->fixUniqueId();
435 }
436
437 //=============================================================================================
438 // Mutex keyword implementation
439 //=============================================================================================
440
441 void MutexKeyword::postvisit(FunctionDecl* decl) {
442
443 bool first = false;
444 std::list<DeclarationWithType*> mutexArgs = findMutexArgs( decl, first );
445 bool isDtor = CodeGen::isDestructor( decl->name );
446
447 // Is this function relevant to monitors
448 if( mutexArgs.empty() ) {
449 // If this is the destructor for a monitor it must be mutex
450 if(isDtor) {
451 Type* ty = decl->get_functionType()->get_parameters().front()->get_type();
452
453 // If it's a copy, it's not a mutex
454 ReferenceType* rty = dynamic_cast< ReferenceType * >( ty );
455 if( ! rty ) return;
456
457 // If we are not pointing directly to a type, it's not a mutex
458 Type* base = rty->get_base();
459 if( dynamic_cast< ReferenceType * >( base ) ) return;
460 if( dynamic_cast< PointerType * >( base ) ) return;
461
462 // Check if its a struct
463 StructInstType * baseStruct = dynamic_cast< StructInstType * >( base );
464 if( !baseStruct ) return;
465
466 // Check if its a monitor
467 if(baseStruct->baseStruct->is_monitor() || baseStruct->baseStruct->is_thread())
468 SemanticError( decl, "destructors for structures declared as \"monitor\" must use mutex parameters\n" );
469 }
470 return;
471 }
472
473 // Monitors can't be constructed with mutual exclusion
474 if( CodeGen::isConstructor(decl->name) && !first ) SemanticError( decl, "constructors cannot have mutex parameters" );
475
476 // It makes no sense to have multiple mutex parameters for the destructor
477 if( isDtor && mutexArgs.size() != 1 ) SemanticError( decl, "destructors can only have 1 mutex argument" );
478
479 // Make sure all the mutex arguments are monitors
480 for(auto arg : mutexArgs) {
481 validate( arg );
482 }
483
484 // Check if we need to instrument the body
485 CompoundStmt* body = decl->get_statements();
486 if( ! body ) return;
487
488 // Do we have the required headers
489 if( !monitor_decl || !guard_decl || !dtor_guard_decl )
490 SemanticError( decl, "mutex keyword requires monitors to be in scope, add #include <monitor.hfa>\n" );
491
492 // Instrument the body
493 if( isDtor ) {
494 addDtorStatments( decl, body, mutexArgs );
495 }
496 else {
497 addStatments( decl, body, mutexArgs );
498 }
499 }
500
501 void MutexKeyword::postvisit(StructDecl* decl) {
502
503 if( decl->name == "monitor_desc" && decl->body ) {
504 assert( !monitor_decl );
505 monitor_decl = decl;
506 }
507 else if( decl->name == "monitor_guard_t" && decl->body ) {
508 assert( !guard_decl );
509 guard_decl = decl;
510 }
511 else if( decl->name == "monitor_dtor_guard_t" && decl->body ) {
512 assert( !dtor_guard_decl );
513 dtor_guard_decl = decl;
514 }
515 }
516
517 std::list<DeclarationWithType*> MutexKeyword::findMutexArgs( FunctionDecl* decl, bool & first ) {
518 std::list<DeclarationWithType*> mutexArgs;
519
520 bool once = true;
521 for( auto arg : decl->get_functionType()->get_parameters()) {
522 //Find mutex arguments
523 Type* ty = arg->get_type();
524 if( ! ty->get_mutex() ) continue;
525
526 if(once) {first = true;}
527 once = false;
528
529 //Append it to the list
530 mutexArgs.push_back( arg );
531 }
532
533 return mutexArgs;
534 }
535
536 void MutexKeyword::validate( DeclarationWithType * arg ) {
537 Type* ty = arg->get_type();
538
539 //Makes sure it's not a copy
540 ReferenceType* rty = dynamic_cast< ReferenceType * >( ty );
541 if( ! rty ) SemanticError( arg, "Mutex argument must be of reference type " );
542
543 //Make sure the we are pointing directly to a type
544 Type* base = rty->get_base();
545 if( dynamic_cast< ReferenceType * >( base ) ) SemanticError( arg, "Mutex argument have exactly one level of indirection " );
546 if( dynamic_cast< PointerType * >( base ) ) SemanticError( arg, "Mutex argument have exactly one level of indirection " );
547
548 //Make sure that typed isn't mutex
549 if( base->get_mutex() ) SemanticError( arg, "mutex keyword may only appear once per argument " );
550 }
551
552 void MutexKeyword::addDtorStatments( FunctionDecl* func, CompoundStmt * body, const std::list<DeclarationWithType * > & args ) {
553 Type * arg_type = args.front()->get_type()->clone();
554 arg_type->set_mutex( false );
555
556 ObjectDecl * monitors = new ObjectDecl(
557 "__monitor",
558 noStorageClasses,
559 LinkageSpec::Cforall,
560 nullptr,
561 new PointerType(
562 noQualifiers,
563 new StructInstType(
564 noQualifiers,
565 monitor_decl
566 )
567 ),
568 new SingleInit( new UntypedExpr(
569 new NameExpr( "get_monitor" ),
570 { new CastExpr( new VariableExpr( args.front() ), arg_type ) }
571 ))
572 );
573
574 assert(generic_func);
575
576 //in reverse order :
577 // monitor_dtor_guard_t __guard = { __monitors, func };
578 body->push_front(
579 new DeclStmt( new ObjectDecl(
580 "__guard",
581 noStorageClasses,
582 LinkageSpec::Cforall,
583 nullptr,
584 new StructInstType(
585 noQualifiers,
586 dtor_guard_decl
587 ),
588 new ListInit(
589 {
590 new SingleInit( new AddressExpr( new VariableExpr( monitors ) ) ),
591 new SingleInit( new CastExpr( new VariableExpr( func ), generic_func->clone() ) )
592 },
593 noDesignators,
594 true
595 )
596 ))
597 );
598
599 //monitor_desc * __monitors[] = { get_monitor(a), get_monitor(b) };
600 body->push_front( new DeclStmt( monitors) );
601 }
602
603 void MutexKeyword::addStatments( FunctionDecl* func, CompoundStmt * body, const std::list<DeclarationWithType * > & args ) {
604 ObjectDecl * monitors = new ObjectDecl(
605 "__monitors",
606 noStorageClasses,
607 LinkageSpec::Cforall,
608 nullptr,
609 new ArrayType(
610 noQualifiers,
611 new PointerType(
612 noQualifiers,
613 new StructInstType(
614 noQualifiers,
615 monitor_decl
616 )
617 ),
618 new ConstantExpr( Constant::from_ulong( args.size() ) ),
619 false,
620 false
621 ),
622 new ListInit(
623 map_range < std::list<Initializer*> > ( args, [](DeclarationWithType * var ){
624 Type * type = var->get_type()->clone();
625 type->set_mutex( false );
626 return new SingleInit( new UntypedExpr(
627 new NameExpr( "get_monitor" ),
628 { new CastExpr( new VariableExpr( var ), type ) }
629 ) );
630 })
631 )
632 );
633
634 assert(generic_func);
635
636 // in reverse order :
637 // monitor_guard_t __guard = { __monitors, #, func };
638 body->push_front(
639 new DeclStmt( new ObjectDecl(
640 "__guard",
641 noStorageClasses,
642 LinkageSpec::Cforall,
643 nullptr,
644 new StructInstType(
645 noQualifiers,
646 guard_decl
647 ),
648 new ListInit(
649 {
650 new SingleInit( new VariableExpr( monitors ) ),
651 new SingleInit( new ConstantExpr( Constant::from_ulong( args.size() ) ) ),
652 new SingleInit( new CastExpr( new VariableExpr( func ), generic_func->clone() ) )
653 },
654 noDesignators,
655 true
656 )
657 ))
658 );
659
660 //monitor_desc * __monitors[] = { get_monitor(a), get_monitor(b) };
661 body->push_front( new DeclStmt( monitors) );
662 }
663
664 //=============================================================================================
665 // General entry routine
666 //=============================================================================================
667 void ThreadStarter::previsit( StructDecl * decl ) {
668 if( decl->name == "thread_desc" && decl->body ) {
669 assert( !thread_decl );
670 thread_decl = decl;
671 }
672 }
673
674 void ThreadStarter::postvisit(FunctionDecl * decl) {
675 if( ! CodeGen::isConstructor(decl->name) ) return;
676
677 Type * typeof_this = InitTweak::getTypeofThis(decl->type);
678 StructInstType * ctored_type = dynamic_cast< StructInstType * >( typeof_this );
679 if( ctored_type && ctored_type->baseStruct == thread_decl ) {
680 thread_ctor_seen = true;
681 }
682
683 DeclarationWithType * param = decl->get_functionType()->get_parameters().front();
684 auto type = dynamic_cast< StructInstType * >( InitTweak::getPointerBase( param->get_type() ) );
685 if( type && type->get_baseStruct()->is_thread() ) {
686 if( !thread_decl || !thread_ctor_seen ) {
687 SemanticError( type->get_baseStruct()->location, "thread keyword requires threads to be in scope, add #include <thread.hfa>");
688 }
689
690 addStartStatement( decl, param );
691 }
692 }
693
694 void ThreadStarter::addStartStatement( FunctionDecl * decl, DeclarationWithType * param ) {
695 CompoundStmt * stmt = decl->get_statements();
696
697 if( ! stmt ) return;
698
699 stmt->push_back(
700 new ExprStmt(
701 new UntypedExpr(
702 new NameExpr( "__thrd_start" ),
703 { new VariableExpr( param ) }
704 )
705 )
706 );
707 }
708};
709
710// Local Variables: //
711// mode: c //
712// tab-width: 4 //
713// End: //
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