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source: src/main.cc @ eb211bf

ADTast-experimentalenumpthread-emulationqualifiedEnum

Last change on this file since eb211bf was b56ad5e, checked in by Fangren Yu <f37yu@…>, 2 years ago
Merge branch 'master' of plg.uwaterloo.ca:software/cfa/cfa-cc
Property mode set to `100644`
File size: 31.3 KB

Line
1	//
2	// Cforall Version 1.0.0 Copyright (C) 2015 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	// main.cc --
8	//
9	// Author : Peter Buhr and Rob Schluntz
10	// Created On : Fri May 15 23:12:02 2015
11	// Last Modified By : Andrew Beach
12	// Last Modified On : Wed Jan 26 14:09:00 2022
13	// Update Count : 670
14	//
15
16	#include <cxxabi.h> // for __cxa_demangle
17	#include <execinfo.h> // for backtrace, backtrace_symbols
18	#include <getopt.h> // for no_argument, optind, geto...
19	#include <cassert> // for assertf
20	#include <cstdio> // for fopen, FILE, fclose, stdin
21	#include <cstdlib> // for exit, free, abort, EXIT_F...
22	#include <csignal> // for signal, SIGABRT, SIGSEGV
23	#include <cstring> // for index
24	#include <fstream> // for ofstream
25	#include <iostream> // for operator<<, basic_ostream
26	#include <iomanip>
27	#include <iterator> // for back_inserter
28	#include <list> // for list
29	#include <string> // for char_traits, operator<<
30
31	using namespace std;
32
33	#include "AST/Convert.hpp"
34	#include "CompilationState.h"
35	#include "../config.h" // for CFA_LIBDIR
36	#include "CodeGen/FixMain.h" // for FixMain
37	#include "CodeGen/FixNames.h" // for fixNames
38	#include "CodeGen/Generate.h" // for generate
39	#include "CodeGen/LinkOnce.h" // for translateLinkOnce
40	#include "CodeTools/DeclStats.h" // for printDeclStats
41	#include "CodeTools/ResolvProtoDump.h" // for dumpAsResolvProto
42	#include "CodeTools/TrackLoc.h" // for fillLocations
43	#include "Common/CodeLocationTools.hpp" // for forceFillCodeLocations
44	#include "Common/CompilerError.h" // for CompilerError
45	#include "Common/DeclStats.hpp" // for printDeclStats
46	#include "Common/ResolvProtoDump.hpp" // for dumpAsResolverProto
47	#include "Common/Stats.h"
48	#include "Common/PassVisitor.h"
49	#include "Common/SemanticError.h" // for SemanticError
50	#include "Common/UnimplementedError.h" // for UnimplementedError
51	#include "Common/utility.h" // for deleteAll, filter, printAll
52	#include "Concurrency/Keywords.h" // for implementMutex, implement...
53	#include "Concurrency/Waitfor.h" // for generateWaitfor
54	#include "ControlStruct/ExceptDecl.h" // for translateExcept
55	#include "ControlStruct/ExceptTranslate.h" // for translateEHM
56	#include "ControlStruct/FixLabels.hpp" // for fixLabels
57	#include "ControlStruct/HoistControlDecls.hpp" // hoistControlDecls
58	#include "ControlStruct/Mutate.h" // for mutate
59	#include "GenPoly/Box.h" // for box
60	#include "GenPoly/InstantiateGeneric.h" // for instantiateGeneric
61	#include "GenPoly/Lvalue.h" // for convertLvalue
62	#include "GenPoly/Specialize.h" // for convertSpecializations
63	#include "InitTweak/FixInit.h" // for fix
64	#include "InitTweak/GenInit.h" // for genInit
65	#include "MakeLibCfa.h" // for makeLibCfa
66	#include "Parser/ParseNode.h" // for DeclarationNode, buildList
67	#include "Parser/TypedefTable.h" // for TypedefTable
68	#include "ResolvExpr/AlternativePrinter.h" // for AlternativePrinter
69	#include "ResolvExpr/CandidatePrinter.hpp" // for printCandidates
70	#include "ResolvExpr/Resolver.h" // for resolve
71	#include "SymTab/Validate.h" // for validate
72	#include "SynTree/LinkageSpec.h" // for Spec, Cforall, Intrinsic
73	#include "SynTree/Declaration.h" // for Declaration
74	#include "SynTree/Visitor.h" // for acceptAll
75	#include "Tuples/Tuples.h" // for expandMemberTuples, expan...
76	#include "Validate/Autogen.hpp" // for autogenerateRoutines
77	#include "Validate/FindSpecialDecls.h" // for findGlobalDecls
78	#include "Validate/CompoundLiteral.hpp" // for handleCompoundLiterals
79	#include "Validate/InitializerLength.hpp" // for setLengthFromInitializer
80	#include "Validate/LabelAddressFixer.hpp" // for fixLabelAddresses
81	#include "Virtual/ExpandCasts.h" // for expandCasts
82
83	static void NewPass( const char * const name ) {
84	Stats::Heap::newPass( name );
85	using namespace Stats::Counters;
86	{
87	static auto group = build<CounterGroup>( "Pass Visitor" );
88	auto pass = build<CounterGroup>( name, group );
89	pass_visitor_stats.depth = 0;
90	pass_visitor_stats.avg = build<AverageCounter<double>>( "Average Depth", pass );
91	pass_visitor_stats.max = build<MaxCounter<double>>( "Max Depth", pass );
92	}
93	{
94	static auto group = build<CounterGroup>( "Syntax Node" );
95	auto pass = build<CounterGroup>( name, group );
96	BaseSyntaxNode::new_nodes = build<SimpleCounter>( "Allocs", pass );
97	}
98	}
99
100	#define PASS( name, pass ) \
101	if ( errorp ) { cerr << name << endl; } \
102	NewPass(name); \
103	Stats::Time::StartBlock(name); \
104	pass; \
105	Stats::Time::StopBlock();
106
107	LinkageSpec::Spec linkage = LinkageSpec::Cforall;
108	TypedefTable typedefTable;
109	DeclarationNode * parseTree = nullptr; // program parse tree
110
111	static bool waiting_for_gdb = false; // flag to set cfa-cpp to wait for gdb on start
112
113	static string PreludeDirector = "";
114
115	static void parse_cmdline( int argc, char * argv[] );
116	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit = false );
117	static void dump( list< Declaration * > & translationUnit, ostream & out = cout );
118	static void dump( ast::TranslationUnit && transUnit, ostream & out = cout );
119
120	static void backtrace( int start ) { // skip first N stack frames
121	enum { Frames = 50, }; // maximum number of stack frames
122	void * array[Frames];
123	size_t size = ::backtrace( array, Frames );
124	char ** messages = ::backtrace_symbols( array, size ); // does not demangle names
125
126	*index( messages[0], '(' ) = '\0'; // find executable name
127	cerr << "Stack back trace for: " << messages[0] << endl;
128
129	// skip last 2 stack frames after main
130	for ( unsigned int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
131	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
132
133	for ( char * p = messages[i]; *p; p += 1 ) { // find parantheses and +offset
134	if ( *p == '(' ) {
135	mangled_name = p;
136	} else if ( *p == '+' ) {
137	offset_begin = p;
138	} else if ( *p == ')' ) {
139	offset_end = p;
140	break;
141	} // if
142	} // for
143
144	// if line contains symbol, attempt to demangle
145	int frameNo = i - start;
146	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
147	*mangled_name++ = '\0'; // delimit strings
148	*offset_begin++ = '\0';
149	*offset_end++ = '\0';
150
151	int status;
152	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
153	// bug in __cxa_demangle for single-character lower-case non-mangled names
154	if ( status == 0 ) { // demangling successful ?
155	cerr << "(" << frameNo << ") " << messages[i] << " : "
156	<< real_name << "+" << offset_begin << offset_end << endl;
157	} else { // otherwise, output mangled name
158	cerr << "(" << frameNo << ") " << messages[i] << " : "
159	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
160	} // if
161
162	free( real_name );
163	} else { // otherwise, print the whole line
164	cerr << "(" << frameNo << ") " << messages[i] << endl;
165	} // if
166	} // for
167
168	free( messages );
169	} // backtrace
170
171	#define SIGPARMS int sig __attribute__(( unused )), siginfo_t * sfp __attribute__(( unused )), ucontext_t * cxt __attribute__(( unused ))
172
173	static void _Signal(struct sigaction & act, int sig, int flags ) {
174	act.sa_flags = flags;
175
176	if ( sigaction( sig, &act, nullptr ) == -1 ) {
177	cerr << "cfa-cpp compilation error problem installing signal handler, error(" << errno << ") " << strerror( errno ) << endl;
178	_exit( EXIT_FAILURE );
179	} // if
180	}
181
182	static void Signal( int sig, void (* handler)(SIGPARMS), int flags ) {
183	struct sigaction act;
184	act.sa_sigaction = (void ()(int, siginfo_t , void *))handler;
185	_Signal(act, sig, flags);
186	} // Signal
187
188	static void Signal( int sig, void (* handler)(int), int flags ) {
189	struct sigaction act;
190	act.sa_handler = handler;
191	_Signal(act, sig, flags);
192	} // Signal
193
194	static void sigSegvBusHandler( SIGPARMS ) {
195	if ( sfp->si_addr == nullptr ) {
196	cerr << "Null pointer (nullptr) dereference." << endl;
197	} else {
198	cerr << (sig == SIGSEGV ? "Segment fault" : "Bus error") << " at memory location " << sfp->si_addr << "." << endl
199	<< "Possible cause is reading outside the address space or writing to a protected area within the address space with an invalid pointer or subscript." << endl;
200	} // if
201	backtrace( 2 ); // skip first 2 stack frames
202	abort(); // cause core dump for debugging
203	} // sigSegvBusHandler
204
205	static void sigFpeHandler( SIGPARMS ) {
206	const char * msg;
207
208	switch ( sfp->si_code ) {
209	case FPE_INTDIV: case FPE_FLTDIV: msg = "divide by zero"; break;
210	case FPE_FLTOVF: msg = "overflow"; break;
211	case FPE_FLTUND: msg = "underflow"; break;
212	case FPE_FLTRES: msg = "inexact result"; break;
213	case FPE_FLTINV: msg = "invalid operation"; break;
214	default: msg = "unknown";
215	} // choose
216	cerr << "Computation error " << msg << " at location " << sfp->si_addr << endl
217	<< "Possible cause is constant-expression evaluation invalid." << endl;
218	backtrace( 2 ); // skip first 2 stack frames
219	abort(); // cause core dump for debugging
220	} // sigFpeHandler
221
222	static void sigAbortHandler( SIGPARMS ) {
223	backtrace( 6 ); // skip first 6 stack frames
224	Signal( SIGABRT, SIG_DFL, SA_SIGINFO ); // reset default signal handler
225	raise( SIGABRT ); // reraise SIGABRT
226	} // sigAbortHandler
227
228	int main( int argc, char * argv[] ) {
229	FILE * input; // use FILE rather than istream because yyin is FILE
230	ostream * output = & cout;
231	list< Declaration * > translationUnit;
232
233	Signal( SIGSEGV, sigSegvBusHandler, SA_SIGINFO );
234	Signal( SIGBUS, sigSegvBusHandler, SA_SIGINFO );
235	Signal( SIGFPE, sigFpeHandler, SA_SIGINFO );
236	Signal( SIGABRT, sigAbortHandler, SA_SIGINFO );
237
238	// cout << "main" << endl;
239	// for ( int i = 0; i < argc; i += 1 ) {
240	// cout << '\t' << argv[i] << endl;
241	// } // for
242
243	parse_cmdline( argc, argv ); // process command-line arguments
244	CodeGen::FixMain::setReplaceMain( !nomainp );
245
246	if ( waiting_for_gdb ) {
247	cerr << "Waiting for gdb" << endl;
248	cerr << "run :" << endl;
249	cerr << " gdb attach " << getpid() << endl;
250	raise(SIGSTOP);
251	} // if
252
253	try {
254	// choose to read the program from a file or stdin
255	if ( optind < argc ) { // any commands after the flags ? => input file name
256	input = fopen( argv[ optind ], "r" );
257	assertf( input, "cannot open %s because %s\n", argv[ optind ], strerror( errno ) );
258	optind += 1;
259	} else { // no input file name
260	input = stdin;
261	} // if
262
263	Stats::Time::StartGlobal();
264	NewPass("Parse");
265	Stats::Time::StartBlock("Parse");
266
267	// read in the builtins, extras, and the prelude
268	if ( ! nopreludep ) { // include gcc builtins
269	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
270
271	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
272
273	// Read to gcc builtins, if not generating the cfa library
274	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cf").c_str(), "r" );
275	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
276	parse( gcc_builtins, LinkageSpec::Compiler );
277
278	// read the extra prelude in, if not generating the cfa library
279	FILE * extras = fopen( (PreludeDirector + "/extras.cf").c_str(), "r" );
280	assertf( extras, "cannot open extras.cf\n" );
281	parse( extras, LinkageSpec::BuiltinC );
282
283	if ( ! libcfap ) {
284	// read the prelude in, if not generating the cfa library
285	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
286	assertf( prelude, "cannot open prelude.cfa\n" );
287	parse( prelude, LinkageSpec::Intrinsic );
288
289	// Read to cfa builtins, if not generating the cfa library
290	FILE * builtins = fopen( (PreludeDirector + "/builtins.cf").c_str(), "r" );
291	assertf( builtins, "cannot open builtins.cf\n" );
292	parse( builtins, LinkageSpec::BuiltinCFA );
293	} // if
294	} // if
295
296	parse( input, libcfap ? LinkageSpec::Intrinsic : LinkageSpec::Cforall, yydebug );
297
298	if ( parsep ) {
299	parseTree->printList( cout );
300	delete parseTree;
301	return EXIT_SUCCESS;
302	} // if
303
304	buildList( parseTree, translationUnit );
305	delete parseTree;
306	parseTree = nullptr;
307
308	if ( astp ) {
309	dump( translationUnit );
310	return EXIT_SUCCESS;
311	} // if
312
313	// Temporary: fill locations after parsing so that every node has a location, for early error messages.
314	// Eventually we should pass the locations from the parser to every node, but this quick and dirty solution
315	// works okay for now.
316	CodeTools::fillLocations( translationUnit );
317	Stats::Time::StopBlock();
318
319	PASS( "Translate Exception Declarations", ControlStruct::translateExcept( translationUnit ) );
320	if ( exdeclp ) {
321	dump( translationUnit );
322	return EXIT_SUCCESS;
323	} // if
324
325	// add the assignment statement after the initialization of a type parameter
326	PASS( "Validate-A", SymTab::validate_A( translationUnit ) );
327	PASS( "Validate-B", SymTab::validate_B( translationUnit ) );
328	PASS( "Validate-C", SymTab::validate_C( translationUnit ) );
329
330	CodeTools::fillLocations( translationUnit );
331
332	if( useNewAST ) {
333	PASS( "Apply Concurrent Keywords", Concurrency::applyKeywords( translationUnit ) );
334	PASS( "Forall Pointer Decay", SymTab::decayForallPointers( translationUnit ) );
335	CodeTools::fillLocations( translationUnit );
336
337	if (Stats::Counters::enabled) {
338	ast::pass_visitor_stats.avg = Stats::Counters::build<Stats::Counters::AverageCounter<double>>("Average Depth - New");
339	ast::pass_visitor_stats.max = Stats::Counters::build<Stats::Counters::MaxCounter<double>>("Max depth - New");
340	}
341	auto transUnit = convert( move( translationUnit ) );
342
343	forceFillCodeLocations( transUnit );
344
345	// Must happen before autogen routines are added.
346	PASS( "Hoist Control Declarations", ControlStruct::hoistControlDecls( transUnit ) );
347
348	// Must be after enum and pointer decay.
349	// Must be before compound literals.
350	PASS( "Generate Autogen Routines", Validate::autogenerateRoutines( transUnit ) );
351
352	PASS( "Implement Mutex", Concurrency::implementMutex( transUnit ) );
353	PASS( "Implement Thread Start", Concurrency::implementThreadStarter( transUnit ) );
354	PASS( "Compound Literal", Validate::handleCompoundLiterals( transUnit ) );
355	PASS( "Set Length From Initializer", Validate::setLengthFromInitializer( transUnit ) );
356	PASS( "Find Global Decls", Validate::findGlobalDecls( transUnit ) );
357	PASS( "Fix Label Address", Validate::fixLabelAddresses( transUnit ) );
358
359	if ( symtabp ) {
360	return EXIT_SUCCESS;
361	} // if
362
363	if ( expraltp ) {
364	ResolvExpr::printCandidates( transUnit );
365	return EXIT_SUCCESS;
366	} // if
367
368	if ( validp ) {
369	dump( move( transUnit ) );
370	return EXIT_SUCCESS;
371	} // if
372
373	PASS( "Translate Throws", ControlStruct::translateThrows( transUnit ) );
374	PASS( "Fix Labels", ControlStruct::fixLabels( transUnit ) );
375	PASS( "Fix Names", CodeGen::fixNames( transUnit ) );
376	PASS( "Gen Init", InitTweak::genInit( transUnit ) );
377	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( transUnit ) );
378
379	if ( libcfap ) {
380	// Generate the bodies of cfa library functions.
381	LibCfa::makeLibCfa( transUnit );
382	} // if
383
384	if ( declstatsp ) {
385	printDeclStats( transUnit );
386	return EXIT_SUCCESS;
387	} // if
388
389	if ( bresolvep ) {
390	dump( move( transUnit ) );
391	return EXIT_SUCCESS;
392	} // if
393
394	if ( resolvprotop ) {
395	dumpAsResolverProto( transUnit );
396	return EXIT_SUCCESS;
397	} // if
398
399	PASS( "Resolve", ResolvExpr::resolve( transUnit ) );
400	if ( exprp ) {
401	dump( move( transUnit ) );
402	return EXIT_SUCCESS;
403	} // if
404
405	forceFillCodeLocations( transUnit );
406
407	PASS( "Fix Init", InitTweak::fix(transUnit, buildingLibrary()));
408
409	// fix ObjectDecl - replaces ConstructorInit nodes
410	if ( ctorinitp ) {
411	dump( move( transUnit ) );
412	return EXIT_SUCCESS;
413	} // if
414
415	// Currently not working due to unresolved issues with UniqueExpr
416	PASS( "Expand Unique Expr", Tuples::expandUniqueExpr( transUnit ) ); // xxx - is this the right place for this? want to expand ASAP so tha, sequent passes don't need to worry about double-visiting a unique expr - needs to go after InitTweak::fix so that copy constructed return declarations are reused
417
418	PASS( "Translate Tries" , ControlStruct::translateTries( transUnit ) );
419
420	translationUnit = convert( move( transUnit ) );
421	} else {
422	PASS( "Validate-D", SymTab::validate_D( translationUnit ) );
423	PASS( "Validate-E", SymTab::validate_E( translationUnit ) );
424	PASS( "Validate-F", SymTab::validate_F( translationUnit ) );
425
426	if ( symtabp ) {
427	deleteAll( translationUnit );
428	return EXIT_SUCCESS;
429	} // if
430
431	if ( expraltp ) {
432	PassVisitor<ResolvExpr::AlternativePrinter> printer( cout );
433	acceptAll( translationUnit, printer );
434	return EXIT_SUCCESS;
435	} // if
436
437	if ( validp ) {
438	dump( translationUnit );
439	return EXIT_SUCCESS;
440	} // if
441
442	PASS( "Translate Throws", ControlStruct::translateThrows( translationUnit ) );
443	PASS( "Fix Labels", ControlStruct::fixLabels( translationUnit ) );
444	PASS( "Fix Names", CodeGen::fixNames( translationUnit ) );
445	PASS( "Gen Init", InitTweak::genInit( translationUnit ) );
446	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( translationUnit ) );
447
448	if ( libcfap ) {
449	// Generate the bodies of cfa library functions.
450	LibCfa::makeLibCfa( translationUnit );
451	} // if
452
453	if ( declstatsp ) {
454	CodeTools::printDeclStats( translationUnit );
455	deleteAll( translationUnit );
456	return EXIT_SUCCESS;
457	} // if
458
459	if ( bresolvep ) {
460	dump( translationUnit );
461	return EXIT_SUCCESS;
462	} // if
463
464	CodeTools::fillLocations( translationUnit );
465
466	if ( resolvprotop ) {
467	CodeTools::dumpAsResolvProto( translationUnit );
468	return EXIT_SUCCESS;
469	} // if
470
471	PASS( "Resolve", ResolvExpr::resolve( translationUnit ) );
472	if ( exprp ) {
473	dump( translationUnit );
474	return EXIT_SUCCESS;
475	}
476
477	PASS( "Fix Init", InitTweak::fix( translationUnit, buildingLibrary() ) );
478
479	// fix ObjectDecl - replaces ConstructorInit nodes
480	if ( ctorinitp ) {
481	dump ( translationUnit );
482	return EXIT_SUCCESS;
483	} // if
484
485	PASS( "Expand Unique Expr", Tuples::expandUniqueExpr( translationUnit ) ); // xxx - is this the right place for this? want to expand ASAP so tha, sequent passes don't need to worry about double-visiting a unique expr - needs to go after InitTweak::fix so that copy constructed return declarations are reused
486
487	PASS( "Translate Tries" , ControlStruct::translateTries( translationUnit ) );
488	}
489
490
491
492	PASS( "Gen Waitfor" , Concurrency::generateWaitFor( translationUnit ) );
493
494	PASS( "Convert Specializations", GenPoly::convertSpecializations( translationUnit ) ); // needs to happen before tuple types are expanded
495
496	PASS( "Expand Tuples", Tuples::expandTuples( translationUnit ) ); // xxx - is this the right place for this?
497
498	if ( tuplep ) {
499	dump( translationUnit );
500	return EXIT_SUCCESS;
501	} // if
502
503	PASS( "Virtual Expand Casts", Virtual::expandCasts( translationUnit ) ); // Must come after translateEHM
504
505	PASS( "Instantiate Generics", GenPoly::instantiateGeneric( translationUnit ) );
506	if ( genericsp ) {
507	dump( translationUnit );
508	return EXIT_SUCCESS;
509	} // if
510
511	PASS( "Convert L-Value", GenPoly::convertLvalue( translationUnit ) );
512
513	if ( bboxp ) {
514	dump( translationUnit );
515	return EXIT_SUCCESS;
516	} // if
517	PASS( "Box", GenPoly::box( translationUnit ) );
518
519	PASS( "Link-Once", CodeGen::translateLinkOnce( translationUnit ) );
520
521	// Code has been lowered to C, now we can start generation.
522
523	if ( bcodegenp ) {
524	dump( translationUnit );
525	return EXIT_SUCCESS;
526	} // if
527
528	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
529	output = new ofstream( argv[ optind ] );
530	} // if
531
532	CodeTools::fillLocations( translationUnit );
533	PASS( "Code Gen", CodeGen::generate( translationUnit, *output, ! genproto, prettycodegenp, true, linemarks ) );
534
535	CodeGen::FixMain::fix( translationUnit, *output,
536	(PreludeDirector + "/bootloader.c").c_str() );
537	if ( output != &cout ) {
538	delete output;
539	} // if
540	} catch ( SemanticErrorException & e ) {
541	if ( errorp ) {
542	cerr << "---AST at error:---" << endl;
543	dump( translationUnit, cerr );
544	cerr << endl << "---End of AST, begin error message:---\n" << endl;
545	} // if
546	e.print();
547	if ( output != &cout ) {
548	delete output;
549	} // if
550	return EXIT_FAILURE;
551	} catch ( UnimplementedError & e ) {
552	cout << "Sorry, " << e.get_what() << " is not currently implemented" << endl;
553	if ( output != &cout ) {
554	delete output;
555	} // if
556	return EXIT_FAILURE;
557	} catch ( CompilerError & e ) {
558	cerr << "Compiler Error: " << e.get_what() << endl;
559	cerr << "(please report bugs to [REDACTED])" << endl;
560	if ( output != &cout ) {
561	delete output;
562	} // if
563	return EXIT_FAILURE;
564	} catch ( std::bad_alloc & ) {
565	cerr << "cfa-cpp compilation error std::bad_alloc" << endl;
566	backtrace( 1 );
567	abort();
568	} catch ( ... ) {
569	exception_ptr eptr = current_exception();
570	try {
571	if (eptr) {
572	rethrow_exception(eptr);
573	} else {
574	cerr << "cfa-cpp compilation error exception uncaught and unknown" << endl;
575	} // if
576	} catch( const exception & e ) {
577	cerr << "cfa-cpp compilation error uncaught exception \"" << e.what() << "\"\n";
578	} // try
579	return EXIT_FAILURE;
580	} // try
581
582	deleteAll( translationUnit );
583	Stats::print();
584	return EXIT_SUCCESS;
585	} // main
586
587
588	static const char optstring[] = ":c:ghlLmNnpdOAP:S:twW:D:";
589
590	enum { PreludeDir = 128 };
591	static struct option long_opts[] = {
592	{ "colors", required_argument, nullptr, 'c' },
593	{ "gdb", no_argument, nullptr, 'g' },
594	{ "help", no_argument, nullptr, 'h' },
595	{ "libcfa", no_argument, nullptr, 'l' },
596	{ "linemarks", no_argument, nullptr, 'L' },
597	{ "no-main", no_argument, 0, 'm' },
598	{ "no-linemarks", no_argument, nullptr, 'N' },
599	{ "no-prelude", no_argument, nullptr, 'n' },
600	{ "prototypes", no_argument, nullptr, 'p' },
601	{ "deterministic-out", no_argument, nullptr, 'd' },
602	{ "old-ast", no_argument, nullptr, 'O'},
603	{ "new-ast", no_argument, nullptr, 'A'},
604	{ "print", required_argument, nullptr, 'P' },
605	{ "prelude-dir", required_argument, nullptr, PreludeDir },
606	{ "statistics", required_argument, nullptr, 'S' },
607	{ "tree", no_argument, nullptr, 't' },
608	{ "", no_argument, nullptr, 0 }, // -w
609	{ "", no_argument, nullptr, 0 }, // -W
610	{ "", no_argument, nullptr, 0 }, // -D
611	{ nullptr, 0, nullptr, 0 }
612	}; // long_opts
613
614	static const char * description[] = {
615	"diagnostic color: never, always, auto", // -c
616	"wait for gdb to attach", // -g
617	"print translator help message", // -h
618	"generate libcfa.c", // -l
619	"generate line marks", // -L
620	"do not replace main", // -m
621	"do not generate line marks", // -N
622	"do not read prelude", // -n
623	"do not generate prelude prototypes => prelude not printed", // -p
624	"only print deterministic output", // -d
625	"Use the old-ast", // -O
626	"Use the new-ast", // -A
627	"print", // -P
628	"<directory> prelude directory for debug/nodebug", // no flag
629	"<option-list> enable profiling information: counters, heap, time, all, none", // -S
630	"building cfa standard lib", // -t
631	"", // -w
632	"", // -W
633	"", // -D
634	}; // description
635
636	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
637
638	static struct Printopts {
639	const char * name;
640	int & flag;
641	int val;
642	const char * descript;
643	} printopts[] = {
644	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
645	{ "asterr", errorp, true, "print AST on error" },
646	{ "declstats", declstatsp, true, "code property statistics" },
647	{ "parse", yydebug, true, "yacc (parsing) debug information" },
648	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
649	{ "rproto", resolvprotop, true, "resolver-proto instance" },
650	{ "rsteps", resolvep, true, "print resolver steps" },
651	{ "tree", parsep, true, "print parse tree" },
652	// code dumps
653	{ "ast", astp, true, "print AST after parsing" },
654	{ "exdecl", exdeclp, true, "print AST after translating exception decls" },
655	{ "symevt", symtabp, true, "print AST after symbol table events" },
656	{ "altexpr", expraltp, true, "print alternatives for expressions" },
657	{ "astdecl", validp, true, "print AST after declaration validation pass" },
658	{ "resolver", bresolvep, true, "print AST before resolver step" },
659	{ "astexpr", exprp, true, "print AST after expression analysis" },
660	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
661	{ "tuple", tuplep, true, "print AST after tuple expansion" },
662	{ "astgen", genericsp, true, "print AST after instantiate generics" },
663	{ "box", bboxp, true, "print AST before box step" },
664	{ "codegen", bcodegenp, true, "print AST before code generation" },
665	};
666	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
667
668	static void usage( char * argv[] ) {
669	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
670	int i = 0, j = 1; // j skips starting colon
671	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
672	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
673	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
674	cout << " -" << optstring[j] << ",";
675	} else { // no flag
676	j -= 1; // compensate
677	cout << " ";
678	} // if
679	cout << " --" << left << setw(12) << long_opts[i].name << " ";
680	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
681	cout << "one of: " << endl;
682	for ( int i = 0; i < printoptsSize; i += 1 ) {
683	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
684	} // for
685	} else {
686	cout << description[i] << endl;
687	} // if
688	} // if
689	if ( optstring[j + 1] == ':' ) j += 1;
690	} // for
691	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
692	exit( EXIT_FAILURE );
693	} // usage
694
695	static void parse_cmdline( int argc, char * argv[] ) {
696	opterr = 0; // (global) prevent getopt from printing error messages
697
698	bool Wsuppress = false, Werror = false;
699	int c;
700	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
701	switch ( c ) {
702	case 'c': // diagnostic colors
703	if ( strcmp( optarg, "always" ) == 0 ) {
704	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
705	} else if ( strcmp( optarg, "never" ) == 0 ) {
706	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
707	} else if ( strcmp( optarg, "auto" ) == 0 ) {
708	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
709	} // if
710	break;
711	case 'h': // help message
712	usage( argv ); // no return
713	break;
714	case 'l': // generate libcfa.c
715	libcfap = true;
716	break;
717	case 'L': // generate line marks
718	linemarks = true;
719	break;
720	case 'm': // do not replace main
721	nomainp = true;
722	break;
723	case 'N': // do not generate line marks
724	linemarks = false;
725	break;
726	case 'n': // do not read prelude
727	nopreludep = true;
728	break;
729	case 'p': // generate prototypes for prelude functions
730	genproto = true;
731	break;
732	case 'd': // don't print non-deterministic output
733	deterministic_output = true;
734	break;
735	case 'O': // don't print non-deterministic output
736	useNewAST = false;
737	break;
738	case 'A': // don't print non-deterministic output
739	useNewAST = true;
740	break;
741	case 'P': // print options
742	for ( int i = 0;; i += 1 ) {
743	if ( i == printoptsSize ) {
744	cout << "Unknown --print option " << optarg << endl;
745	goto Default;
746	} // if
747	if ( strcmp( optarg, printopts[i].name ) == 0 ) {
748	printopts[i].flag = printopts[i].val;
749	break;
750	} // if
751	} // for
752	break;
753	case PreludeDir: // prelude directory for debug/nodebug, hidden
754	PreludeDirector = optarg;
755	break;
756	case 'S': // enable profiling information, argument comma separated list of names
757	Stats::parse_params( optarg );
758	break;
759	case 't': // building cfa stdlib
760	treep = true;
761	break;
762	case 'g': // wait for gdb
763	waiting_for_gdb = true;
764	break;
765	case 'w': // suppress all warnings, hidden
766	Wsuppress = true;
767	break;
768	case 'W': // coordinate gcc -W with CFA, hidden
769	if ( strcmp( optarg, "all" ) == 0 ) {
770	SemanticWarning_EnableAll();
771	} else if ( strcmp( optarg, "error" ) == 0 ) {
772	Werror = true;
773	} else {
774	char * warning = optarg;
775	Severity s;
776	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
777	warning += 3;
778	s = Severity::Suppress;
779	} else {
780	s = Severity::Warn;
781	} // if
782	SemanticWarning_Set( warning, s );
783	} // if
784	break;
785	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
786	break;
787	case '?': // unknown option
788	if ( optopt ) { // short option ?
789	cout << "Unknown option -" << (char)optopt << endl;
790	} else {
791	cout << "Unknown option " << argv[optind - 1] << endl;
792	} // if
793	goto Default;
794	case ':': // missing option
795	if ( optopt ) { // short option ?
796	cout << "Missing option for -" << (char)optopt << endl;
797	} else {
798	cout << "Missing option for " << argv[optind - 1] << endl;
799	} // if
800	goto Default;
801	Default:
802	default:
803	usage( argv ); // no return
804	} // switch
805	} // while
806
807	if ( Werror ) {
808	SemanticWarning_WarningAsError();
809	} // if
810	if ( Wsuppress ) {
811	SemanticWarning_SuppressAll();
812	} // if
813	// for ( const auto w : WarningFormats ) {
814	// cout << w.name << ' ' << (int)w.severity << endl;
815	// } // for
816	} // parse_cmdline
817
818	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit ) {
819	extern int yyparse( void );
820	extern FILE * yyin;
821	extern int yylineno;
822
823	::linkage = linkage; // set globals
824	yyin = input;
825	yylineno = 1;
826	int parseStatus = yyparse();
827
828	fclose( input );
829	if ( shouldExit \|\| parseStatus != 0 ) {
830	exit( parseStatus );
831	} // if
832	} // parse
833
834	static bool notPrelude( Declaration * decl ) {
835	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
836	} // notPrelude
837
838	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
839	list< Declaration * > decls;
840
841	if ( genproto ) {
842	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
843	} else {
844	decls = translationUnit;
845	} // if
846
847	// depending on commandline options, either generate code or dump the AST
848	if ( codegenp ) {
849	CodeGen::generate( decls, out, ! genproto, prettycodegenp );
850	} else {
851	printAll( decls, out );
852	} // if
853	deleteAll( translationUnit );
854	} // dump
855
856	static void dump( ast::TranslationUnit && transUnit, ostream & out ) {
857	std::list< Declaration * > translationUnit = convert( move( transUnit ) );
858	dump( translationUnit, out );
859	}
860
861	// Local Variables: //
862	// tab-width: 4 //
863	// mode: c++ //
864	// compile-command: "make install" //
865	// End: //

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