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source: src/main.cc @ b7fd9daf

ADTast-experimentalenumforall-pointer-decaypthread-emulationqualifiedEnum

Last change on this file since b7fd9daf was b7fd9daf, checked in by Fangren Yu <f37yu@…>, 2 years ago
Merge branch 'new-ast-unique-expr'
Property mode set to `100644`
File size: 29.4 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 : Tue Nov 9 11:10:00 2021
13	// Update Count : 657
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/Waitfor.h" // for generateWaitfor
53	#include "ControlStruct/ExceptDecl.h" // for translateExcept
54	#include "ControlStruct/ExceptTranslate.h" // for translateEHM
55	#include "ControlStruct/FixLabels.hpp" // for fixLabels
56	#include "ControlStruct/Mutate.h" // for mutate
57	#include "GenPoly/Box.h" // for box
58	#include "GenPoly/InstantiateGeneric.h" // for instantiateGeneric
59	#include "GenPoly/Lvalue.h" // for convertLvalue
60	#include "GenPoly/Specialize.h" // for convertSpecializations
61	#include "InitTweak/FixInit.h" // for fix
62	#include "InitTweak/GenInit.h" // for genInit
63	#include "MakeLibCfa.h" // for makeLibCfa
64	#include "Parser/ParseNode.h" // for DeclarationNode, buildList
65	#include "Parser/TypedefTable.h" // for TypedefTable
66	#include "ResolvExpr/AlternativePrinter.h" // for AlternativePrinter
67	#include "ResolvExpr/CandidatePrinter.hpp" // for printCandidates
68	#include "ResolvExpr/Resolver.h" // for resolve
69	#include "SymTab/Validate.h" // for validate
70	#include "SynTree/LinkageSpec.h" // for Spec, Cforall, Intrinsic
71	#include "SynTree/Declaration.h" // for Declaration
72	#include "SynTree/Visitor.h" // for acceptAll
73	#include "Tuples/Tuples.h" // for expandMemberTuples, expan...
74	#include "Virtual/ExpandCasts.h" // for expandCasts
75
76
77	static void NewPass( const char * const name ) {
78	Stats::Heap::newPass( name );
79	using namespace Stats::Counters;
80	{
81	static auto group = build<CounterGroup>( "Pass Visitor" );
82	auto pass = build<CounterGroup>( name, group );
83	pass_visitor_stats.depth = 0;
84	pass_visitor_stats.avg = build<AverageCounter<double>>( "Average Depth", pass );
85	pass_visitor_stats.max = build<MaxCounter<double>>( "Max Depth", pass );
86	}
87	{
88	static auto group = build<CounterGroup>( "Syntax Node" );
89	auto pass = build<CounterGroup>( name, group );
90	BaseSyntaxNode::new_nodes = build<SimpleCounter>( "Allocs", pass );
91	}
92	}
93
94	#define PASS( name, pass ) \
95	if ( errorp ) { cerr << name << endl; } \
96	NewPass(name); \
97	Stats::Time::StartBlock(name); \
98	pass; \
99	Stats::Time::StopBlock();
100
101	LinkageSpec::Spec linkage = LinkageSpec::Cforall;
102	TypedefTable typedefTable;
103	DeclarationNode * parseTree = nullptr; // program parse tree
104
105	static bool waiting_for_gdb = false; // flag to set cfa-cpp to wait for gdb on start
106
107	static string PreludeDirector = "";
108
109	static void parse_cmdline( int argc, char * argv[] );
110	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit = false );
111	static void dump( list< Declaration * > & translationUnit, ostream & out = cout );
112	static void dump( ast::TranslationUnit && transUnit, ostream & out = cout );
113
114	static void backtrace( int start ) { // skip first N stack frames
115	enum { Frames = 50, }; // maximum number of stack frames
116	void * array[Frames];
117	size_t size = ::backtrace( array, Frames );
118	char ** messages = ::backtrace_symbols( array, size ); // does not demangle names
119
120	*index( messages[0], '(' ) = '\0'; // find executable name
121	cerr << "Stack back trace for: " << messages[0] << endl;
122
123	// skip last 2 stack frames after main
124	for ( unsigned int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
125	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
126
127	for ( char * p = messages[i]; *p; p += 1 ) { // find parantheses and +offset
128	if ( *p == '(' ) {
129	mangled_name = p;
130	} else if ( *p == '+' ) {
131	offset_begin = p;
132	} else if ( *p == ')' ) {
133	offset_end = p;
134	break;
135	} // if
136	} // for
137
138	// if line contains symbol, attempt to demangle
139	int frameNo = i - start;
140	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
141	*mangled_name++ = '\0'; // delimit strings
142	*offset_begin++ = '\0';
143	*offset_end++ = '\0';
144
145	int status;
146	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
147	// bug in __cxa_demangle for single-character lower-case non-mangled names
148	if ( status == 0 ) { // demangling successful ?
149	cerr << "(" << frameNo << ") " << messages[i] << " : "
150	<< real_name << "+" << offset_begin << offset_end << endl;
151	} else { // otherwise, output mangled name
152	cerr << "(" << frameNo << ") " << messages[i] << " : "
153	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
154	} // if
155
156	free( real_name );
157	} else { // otherwise, print the whole line
158	cerr << "(" << frameNo << ") " << messages[i] << endl;
159	} // if
160	} // for
161
162	free( messages );
163	} // backtrace
164
165	#define SIGPARMS int sig __attribute__(( unused )), siginfo_t * sfp __attribute__(( unused )), ucontext_t * cxt __attribute__(( unused ))
166
167	static void _Signal(struct sigaction & act, int sig, int flags ) {
168	act.sa_flags = flags;
169
170	if ( sigaction( sig, &act, nullptr ) == -1 ) {
171	cerr << "cfa-cpp compilation error problem installing signal handler, error(" << errno << ") " << strerror( errno ) << endl;
172	_exit( EXIT_FAILURE );
173	} // if
174	}
175
176	static void Signal( int sig, void (* handler)(SIGPARMS), int flags ) {
177	struct sigaction act;
178	act.sa_sigaction = (void ()(int, siginfo_t , void *))handler;
179	_Signal(act, sig, flags);
180	} // Signal
181
182	static void Signal( int sig, void (* handler)(int), int flags ) {
183	struct sigaction act;
184	act.sa_handler = handler;
185	_Signal(act, sig, flags);
186	} // Signal
187
188	static void sigSegvBusHandler( SIGPARMS ) {
189	if ( sfp->si_addr == nullptr ) {
190	cerr << "Null pointer (nullptr) dereference." << endl;
191	} else {
192	cerr << (sig == SIGSEGV ? "Segment fault" : "Bus error") << " at memory location " << sfp->si_addr << "." << endl
193	<< "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;
194	} // if
195	backtrace( 2 ); // skip first 2 stack frames
196	abort(); // cause core dump for debugging
197	} // sigSegvBusHandler
198
199	static void sigFpeHandler( SIGPARMS ) {
200	const char * msg;
201
202	switch ( sfp->si_code ) {
203	case FPE_INTDIV: case FPE_FLTDIV: msg = "divide by zero"; break;
204	case FPE_FLTOVF: msg = "overflow"; break;
205	case FPE_FLTUND: msg = "underflow"; break;
206	case FPE_FLTRES: msg = "inexact result"; break;
207	case FPE_FLTINV: msg = "invalid operation"; break;
208	default: msg = "unknown";
209	} // choose
210	cerr << "Computation error " << msg << " at location " << sfp->si_addr << endl
211	<< "Possible cause is constant-expression evaluation invalid." << endl;
212	backtrace( 2 ); // skip first 2 stack frames
213	abort(); // cause core dump for debugging
214	} // sigFpeHandler
215
216	static void sigAbortHandler( SIGPARMS ) {
217	backtrace( 6 ); // skip first 6 stack frames
218	Signal( SIGABRT, SIG_DFL, SA_SIGINFO ); // reset default signal handler
219	raise( SIGABRT ); // reraise SIGABRT
220	} // sigAbortHandler
221
222	int main( int argc, char * argv[] ) {
223	FILE * input; // use FILE rather than istream because yyin is FILE
224	ostream * output = & cout;
225	list< Declaration * > translationUnit;
226
227	Signal( SIGSEGV, sigSegvBusHandler, SA_SIGINFO );
228	Signal( SIGBUS, sigSegvBusHandler, SA_SIGINFO );
229	Signal( SIGFPE, sigFpeHandler, SA_SIGINFO );
230	Signal( SIGABRT, sigAbortHandler, SA_SIGINFO );
231
232	// cout << "main" << endl;
233	// for ( int i = 0; i < argc; i += 1 ) {
234	// cout << '\t' << argv[i] << endl;
235	// } // for
236
237	parse_cmdline( argc, argv ); // process command-line arguments
238	CodeGen::FixMain::setReplaceMain( !nomainp );
239
240	if ( waiting_for_gdb ) {
241	cerr << "Waiting for gdb" << endl;
242	cerr << "run :" << endl;
243	cerr << " gdb attach " << getpid() << endl;
244	raise(SIGSTOP);
245	} // if
246
247	try {
248	// choose to read the program from a file or stdin
249	if ( optind < argc ) { // any commands after the flags ? => input file name
250	input = fopen( argv[ optind ], "r" );
251	assertf( input, "cannot open %s because %s\n", argv[ optind ], strerror( errno ) );
252	optind += 1;
253	} else { // no input file name
254	input = stdin;
255	} // if
256
257	Stats::Time::StartGlobal();
258	NewPass("Parse");
259	Stats::Time::StartBlock("Parse");
260
261	// read in the builtins, extras, and the prelude
262	if ( ! nopreludep ) { // include gcc builtins
263	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
264
265	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
266
267	// Read to gcc builtins, if not generating the cfa library
268	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cf").c_str(), "r" );
269	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
270	parse( gcc_builtins, LinkageSpec::Compiler );
271
272	// read the extra prelude in, if not generating the cfa library
273	FILE * extras = fopen( (PreludeDirector + "/extras.cf").c_str(), "r" );
274	assertf( extras, "cannot open extras.cf\n" );
275	parse( extras, LinkageSpec::BuiltinC );
276
277	if ( ! libcfap ) {
278	// read the prelude in, if not generating the cfa library
279	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
280	assertf( prelude, "cannot open prelude.cfa\n" );
281	parse( prelude, LinkageSpec::Intrinsic );
282
283	// Read to cfa builtins, if not generating the cfa library
284	FILE * builtins = fopen( (PreludeDirector + "/builtins.cf").c_str(), "r" );
285	assertf( builtins, "cannot open builtins.cf\n" );
286	parse( builtins, LinkageSpec::BuiltinCFA );
287	} // if
288	} // if
289
290	parse( input, libcfap ? LinkageSpec::Intrinsic : LinkageSpec::Cforall, yydebug );
291
292	if ( parsep ) {
293	parseTree->printList( cout );
294	delete parseTree;
295	return EXIT_SUCCESS;
296	} // if
297
298	buildList( parseTree, translationUnit );
299	delete parseTree;
300	parseTree = nullptr;
301
302	if ( astp ) {
303	dump( translationUnit );
304	return EXIT_SUCCESS;
305	} // if
306
307	// Temporary: fill locations after parsing so that every node has a location, for early error messages.
308	// Eventually we should pass the locations from the parser to every node, but this quick and dirty solution
309	// works okay for now.
310	CodeTools::fillLocations( translationUnit );
311	Stats::Time::StopBlock();
312
313	PASS( "Translate Exception Declarations", ControlStruct::translateExcept( translationUnit ) );
314	if ( exdeclp ) {
315	dump( translationUnit );
316	return EXIT_SUCCESS;
317	} // if
318
319	// add the assignment statement after the initialization of a type parameter
320	PASS( "Validate", SymTab::validate( translationUnit, symtabp ) );
321
322	CodeTools::fillLocations( translationUnit );
323
324	if( useNewAST ) {
325	if (Stats::Counters::enabled) {
326	ast::pass_visitor_stats.avg = Stats::Counters::build<Stats::Counters::AverageCounter<double>>("Average Depth - New");
327	ast::pass_visitor_stats.max = Stats::Counters::build<Stats::Counters::MaxCounter<double>>("Max depth - New");
328	}
329	auto transUnit = convert( move( translationUnit ) );
330
331	forceFillCodeLocations( transUnit );
332
333	if ( symtabp ) {
334	return EXIT_SUCCESS;
335	} // if
336
337	if ( expraltp ) {
338	ResolvExpr::printCandidates( transUnit );
339	return EXIT_SUCCESS;
340	} // if
341
342	if ( validp ) {
343	dump( move( transUnit ) );
344	return EXIT_SUCCESS;
345	} // if
346
347	PASS( "Translate Throws", ControlStruct::translateThrows( transUnit ) );
348	PASS( "Fix Labels", ControlStruct::fixLabels( transUnit ) );
349	PASS( "Fix Names", CodeGen::fixNames( transUnit ) );
350	PASS( "Gen Init", InitTweak::genInit( transUnit ) );
351	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( transUnit ) );
352
353	if ( libcfap ) {
354	// Generate the bodies of cfa library functions.
355	LibCfa::makeLibCfa( transUnit );
356	} // if
357
358	if ( declstatsp ) {
359	printDeclStats( transUnit );
360	return EXIT_SUCCESS;
361	} // if
362
363	if ( bresolvep ) {
364	dump( move( transUnit ) );
365	return EXIT_SUCCESS;
366	} // if
367
368	if ( resolvprotop ) {
369	dumpAsResolverProto( transUnit );
370	return EXIT_SUCCESS;
371	} // if
372
373	PASS( "Resolve", ResolvExpr::resolve( transUnit ) );
374	if ( exprp ) {
375	dump( move( transUnit ) );
376	return EXIT_SUCCESS;
377	} // if
378
379	forceFillCodeLocations( transUnit );
380
381	PASS( "Fix Init", InitTweak::fix(transUnit, buildingLibrary()));
382
383	// fix ObjectDecl - replaces ConstructorInit nodes
384	if ( ctorinitp ) {
385	dump( move( transUnit ) );
386	return EXIT_SUCCESS;
387	} // if
388
389	// Currently not working due to unresolved issues with UniqueExpr
390	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
391	translationUnit = convert( move( transUnit ) );
392	} else {
393	if ( symtabp ) {
394	deleteAll( translationUnit );
395	return EXIT_SUCCESS;
396	} // if
397
398	if ( expraltp ) {
399	PassVisitor<ResolvExpr::AlternativePrinter> printer( cout );
400	acceptAll( translationUnit, printer );
401	return EXIT_SUCCESS;
402	} // if
403
404	if ( validp ) {
405	dump( translationUnit );
406	return EXIT_SUCCESS;
407	} // if
408
409	PASS( "Translate Throws", ControlStruct::translateThrows( translationUnit ) );
410	PASS( "Fix Labels", ControlStruct::fixLabels( translationUnit ) );
411	PASS( "Fix Names", CodeGen::fixNames( translationUnit ) );
412	PASS( "Gen Init", InitTweak::genInit( translationUnit ) );
413	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( translationUnit ) );
414
415	if ( libcfap ) {
416	// Generate the bodies of cfa library functions.
417	LibCfa::makeLibCfa( translationUnit );
418	} // if
419
420	if ( declstatsp ) {
421	CodeTools::printDeclStats( translationUnit );
422	deleteAll( translationUnit );
423	return EXIT_SUCCESS;
424	} // if
425
426	if ( bresolvep ) {
427	dump( translationUnit );
428	return EXIT_SUCCESS;
429	} // if
430
431	CodeTools::fillLocations( translationUnit );
432
433	if ( resolvprotop ) {
434	CodeTools::dumpAsResolvProto( translationUnit );
435	return EXIT_SUCCESS;
436	} // if
437
438	PASS( "Resolve", ResolvExpr::resolve( translationUnit ) );
439	if ( exprp ) {
440	dump( translationUnit );
441	return EXIT_SUCCESS;
442	}
443
444	PASS( "Fix Init", InitTweak::fix( translationUnit, buildingLibrary() ) );
445
446	// fix ObjectDecl - replaces ConstructorInit nodes
447	if ( ctorinitp ) {
448	dump ( translationUnit );
449	return EXIT_SUCCESS;
450	} // if
451
452	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
453	}
454
455	PASS( "Translate Tries" , ControlStruct::translateTries( translationUnit ) );
456
457	PASS( "Gen Waitfor" , Concurrency::generateWaitFor( translationUnit ) );
458
459	PASS( "Convert Specializations", GenPoly::convertSpecializations( translationUnit ) ); // needs to happen before tuple types are expanded
460
461	PASS( "Expand Tuples", Tuples::expandTuples( translationUnit ) ); // xxx - is this the right place for this?
462
463	if ( tuplep ) {
464	dump( translationUnit );
465	return EXIT_SUCCESS;
466	} // if
467
468	PASS( "Virtual Expand Casts", Virtual::expandCasts( translationUnit ) ); // Must come after translateEHM
469
470	PASS( "Instantiate Generics", GenPoly::instantiateGeneric( translationUnit ) );
471	if ( genericsp ) {
472	dump( translationUnit );
473	return EXIT_SUCCESS;
474	} // if
475
476	PASS( "Convert L-Value", GenPoly::convertLvalue( translationUnit ) );
477
478	if ( bboxp ) {
479	dump( translationUnit );
480	return EXIT_SUCCESS;
481	} // if
482	PASS( "Box", GenPoly::box( translationUnit ) );
483
484	PASS( "Link-Once", CodeGen::translateLinkOnce( translationUnit ) );
485
486	// Code has been lowered to C, now we can start generation.
487
488	if ( bcodegenp ) {
489	dump( translationUnit );
490	return EXIT_SUCCESS;
491	} // if
492
493	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
494	output = new ofstream( argv[ optind ] );
495	} // if
496
497	CodeTools::fillLocations( translationUnit );
498	PASS( "Code Gen", CodeGen::generate( translationUnit, *output, ! genproto, prettycodegenp, true, linemarks ) );
499
500	CodeGen::FixMain::fix( translationUnit, *output,
501	(PreludeDirector + "/bootloader.c").c_str() );
502	if ( output != &cout ) {
503	delete output;
504	} // if
505	} catch ( SemanticErrorException & e ) {
506	if ( errorp ) {
507	cerr << "---AST at error:---" << endl;
508	dump( translationUnit, cerr );
509	cerr << endl << "---End of AST, begin error message:---\n" << endl;
510	} // if
511	e.print();
512	if ( output != &cout ) {
513	delete output;
514	} // if
515	return EXIT_FAILURE;
516	} catch ( UnimplementedError & e ) {
517	cout << "Sorry, " << e.get_what() << " is not currently implemented" << endl;
518	if ( output != &cout ) {
519	delete output;
520	} // if
521	return EXIT_FAILURE;
522	} catch ( CompilerError & e ) {
523	cerr << "Compiler Error: " << e.get_what() << endl;
524	cerr << "(please report bugs to [REDACTED])" << endl;
525	if ( output != &cout ) {
526	delete output;
527	} // if
528	return EXIT_FAILURE;
529	} catch ( std::bad_alloc & ) {
530	cerr << "cfa-cpp compilation error std::bad_alloc" << endl;
531	backtrace( 1 );
532	abort();
533	} catch ( ... ) {
534	exception_ptr eptr = current_exception();
535	try {
536	if (eptr) {
537	rethrow_exception(eptr);
538	} else {
539	cerr << "cfa-cpp compilation error exception uncaught and unknown" << endl;
540	} // if
541	} catch( const exception & e ) {
542	cerr << "cfa-cpp compilation error uncaught exception \"" << e.what() << "\"\n";
543	} // try
544	return EXIT_FAILURE;
545	} // try
546
547	deleteAll( translationUnit );
548	Stats::print();
549	return EXIT_SUCCESS;
550	} // main
551
552
553	static const char optstring[] = ":c:ghlLmNnpdOAP:S:twW:D:";
554
555	enum { PreludeDir = 128 };
556	static struct option long_opts[] = {
557	{ "colors", required_argument, nullptr, 'c' },
558	{ "gdb", no_argument, nullptr, 'g' },
559	{ "help", no_argument, nullptr, 'h' },
560	{ "libcfa", no_argument, nullptr, 'l' },
561	{ "linemarks", no_argument, nullptr, 'L' },
562	{ "no-main", no_argument, 0, 'm' },
563	{ "no-linemarks", no_argument, nullptr, 'N' },
564	{ "no-prelude", no_argument, nullptr, 'n' },
565	{ "prototypes", no_argument, nullptr, 'p' },
566	{ "deterministic-out", no_argument, nullptr, 'd' },
567	{ "old-ast", no_argument, nullptr, 'O'},
568	{ "new-ast", no_argument, nullptr, 'A'},
569	{ "print", required_argument, nullptr, 'P' },
570	{ "prelude-dir", required_argument, nullptr, PreludeDir },
571	{ "statistics", required_argument, nullptr, 'S' },
572	{ "tree", no_argument, nullptr, 't' },
573	{ "", no_argument, nullptr, 0 }, // -w
574	{ "", no_argument, nullptr, 0 }, // -W
575	{ "", no_argument, nullptr, 0 }, // -D
576	{ nullptr, 0, nullptr, 0 }
577	}; // long_opts
578
579	static const char * description[] = {
580	"diagnostic color: never, always, auto", // -c
581	"wait for gdb to attach", // -g
582	"print translator help message", // -h
583	"generate libcfa.c", // -l
584	"generate line marks", // -L
585	"do not replace main", // -m
586	"do not generate line marks", // -N
587	"do not read prelude", // -n
588	"do not generate prelude prototypes => prelude not printed", // -p
589	"only print deterministic output", // -d
590	"Use the old-ast", // -O
591	"Use the new-ast", // -A
592	"print", // -P
593	"<directory> prelude directory for debug/nodebug", // no flag
594	"<option-list> enable profiling information: counters, heap, time, all, none", // -S
595	"building cfa standard lib", // -t
596	"", // -w
597	"", // -W
598	"", // -D
599	}; // description
600
601	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
602
603	static struct Printopts {
604	const char * name;
605	int & flag;
606	int val;
607	const char * descript;
608	} printopts[] = {
609	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
610	{ "asterr", errorp, true, "print AST on error" },
611	{ "declstats", declstatsp, true, "code property statistics" },
612	{ "parse", yydebug, true, "yacc (parsing) debug information" },
613	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
614	{ "rproto", resolvprotop, true, "resolver-proto instance" },
615	{ "rsteps", resolvep, true, "print resolver steps" },
616	{ "tree", parsep, true, "print parse tree" },
617	// code dumps
618	{ "ast", astp, true, "print AST after parsing" },
619	{ "exdecl", exdeclp, true, "print AST after translating exception decls" },
620	{ "symevt", symtabp, true, "print AST after symbol table events" },
621	{ "altexpr", expraltp, true, "print alternatives for expressions" },
622	{ "astdecl", validp, true, "print AST after declaration validation pass" },
623	{ "resolver", bresolvep, true, "print AST before resolver step" },
624	{ "astexpr", exprp, true, "print AST after expression analysis" },
625	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
626	{ "tuple", tuplep, true, "print AST after tuple expansion" },
627	{ "astgen", genericsp, true, "print AST after instantiate generics" },
628	{ "box", bboxp, true, "print AST before box step" },
629	{ "codegen", bcodegenp, true, "print AST before code generation" },
630	};
631	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
632
633	static void usage( char * argv[] ) {
634	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
635	int i = 0, j = 1; // j skips starting colon
636	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
637	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
638	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
639	cout << " -" << optstring[j] << ",";
640	} else { // no flag
641	j -= 1; // compensate
642	cout << " ";
643	} // if
644	cout << " --" << left << setw(12) << long_opts[i].name << " ";
645	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
646	cout << "one of: " << endl;
647	for ( int i = 0; i < printoptsSize; i += 1 ) {
648	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
649	} // for
650	} else {
651	cout << description[i] << endl;
652	} // if
653	} // if
654	if ( optstring[j + 1] == ':' ) j += 1;
655	} // for
656	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
657	exit( EXIT_FAILURE );
658	} // usage
659
660	static void parse_cmdline( int argc, char * argv[] ) {
661	opterr = 0; // (global) prevent getopt from printing error messages
662
663	bool Wsuppress = false, Werror = false;
664	int c;
665	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
666	switch ( c ) {
667	case 'c': // diagnostic colors
668	if ( strcmp( optarg, "always" ) == 0 ) {
669	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
670	} else if ( strcmp( optarg, "never" ) == 0 ) {
671	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
672	} else if ( strcmp( optarg, "auto" ) == 0 ) {
673	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
674	} // if
675	break;
676	case 'h': // help message
677	usage( argv ); // no return
678	break;
679	case 'l': // generate libcfa.c
680	libcfap = true;
681	break;
682	case 'L': // generate line marks
683	linemarks = true;
684	break;
685	case 'm': // do not replace main
686	nomainp = true;
687	break;
688	case 'N': // do not generate line marks
689	linemarks = false;
690	break;
691	case 'n': // do not read prelude
692	nopreludep = true;
693	break;
694	case 'p': // generate prototypes for prelude functions
695	genproto = true;
696	break;
697	case 'd': // don't print non-deterministic output
698	deterministic_output = true;
699	break;
700	case 'O': // don't print non-deterministic output
701	useNewAST = false;
702	break;
703	case 'A': // don't print non-deterministic output
704	useNewAST = true;
705	break;
706	case 'P': // print options
707	for ( int i = 0;; i += 1 ) {
708	if ( i == printoptsSize ) {
709	cout << "Unknown --print option " << optarg << endl;
710	goto Default;
711	} // if
712	if ( strcmp( optarg, printopts[i].name ) == 0 ) {
713	printopts[i].flag = printopts[i].val;
714	break;
715	} // if
716	} // for
717	break;
718	case PreludeDir: // prelude directory for debug/nodebug, hidden
719	PreludeDirector = optarg;
720	break;
721	case 'S': // enable profiling information, argument comma separated list of names
722	Stats::parse_params( optarg );
723	break;
724	case 't': // building cfa stdlib
725	treep = true;
726	break;
727	case 'g': // wait for gdb
728	waiting_for_gdb = true;
729	break;
730	case 'w': // suppress all warnings, hidden
731	Wsuppress = true;
732	break;
733	case 'W': // coordinate gcc -W with CFA, hidden
734	if ( strcmp( optarg, "all" ) == 0 ) {
735	SemanticWarning_EnableAll();
736	} else if ( strcmp( optarg, "error" ) == 0 ) {
737	Werror = true;
738	} else {
739	char * warning = optarg;
740	Severity s;
741	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
742	warning += 3;
743	s = Severity::Suppress;
744	} else {
745	s = Severity::Warn;
746	} // if
747	SemanticWarning_Set( warning, s );
748	} // if
749	break;
750	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
751	break;
752	case '?': // unknown option
753	if ( optopt ) { // short option ?
754	cout << "Unknown option -" << (char)optopt << endl;
755	} else {
756	cout << "Unknown option " << argv[optind - 1] << endl;
757	} // if
758	goto Default;
759	case ':': // missing option
760	if ( optopt ) { // short option ?
761	cout << "Missing option for -" << (char)optopt << endl;
762	} else {
763	cout << "Missing option for " << argv[optind - 1] << endl;
764	} // if
765	goto Default;
766	Default:
767	default:
768	usage( argv ); // no return
769	} // switch
770	} // while
771
772	if ( Werror ) {
773	SemanticWarning_WarningAsError();
774	} // if
775	if ( Wsuppress ) {
776	SemanticWarning_SuppressAll();
777	} // if
778	// for ( const auto w : WarningFormats ) {
779	// cout << w.name << ' ' << (int)w.severity << endl;
780	// } // for
781	} // parse_cmdline
782
783	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit ) {
784	extern int yyparse( void );
785	extern FILE * yyin;
786	extern int yylineno;
787
788	::linkage = linkage; // set globals
789	yyin = input;
790	yylineno = 1;
791	int parseStatus = yyparse();
792
793	fclose( input );
794	if ( shouldExit \|\| parseStatus != 0 ) {
795	exit( parseStatus );
796	} // if
797	} // parse
798
799	static bool notPrelude( Declaration * decl ) {
800	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
801	} // notPrelude
802
803	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
804	list< Declaration * > decls;
805
806	if ( genproto ) {
807	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
808	} else {
809	decls = translationUnit;
810	} // if
811
812	// depending on commandline options, either generate code or dump the AST
813	if ( codegenp ) {
814	CodeGen::generate( decls, out, ! genproto, prettycodegenp );
815	} else {
816	printAll( decls, out );
817	} // if
818	deleteAll( translationUnit );
819	} // dump
820
821	static void dump( ast::TranslationUnit && transUnit, ostream & out ) {
822	std::list< Declaration * > translationUnit = convert( move( transUnit ) );
823	dump( translationUnit, out );
824	}
825
826	// Local Variables: //
827	// tab-width: 4 //
828	// mode: c++ //
829	// compile-command: "make install" //
830	// End: //

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