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source: src/main.cc @ 8157bde

ADTast-experimentalenumforall-pointer-decaypthread-emulationqualifiedEnum

Last change on this file since 8157bde was ce36b55, checked in by Andrew Beach <ajbeach@…>, 2 years ago
Translation of Validate F; and some improvements in some helpers.
Property mode set to `100644`
File size: 30.2 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 : Fri Nov 12 11:06:00 2021
13	// Update Count : 658
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 "Validate/FindSpecialDecls.h" // for findGlobalDecls
75	#include "Validate/InitializerLength.hpp" // for setLengthFromInitializer
76	#include "Validate/LabelAddressFixer.hpp" // for fixLabelAddresses
77	#include "Virtual/ExpandCasts.h" // for expandCasts
78
79
80	static void NewPass( const char * const name ) {
81	Stats::Heap::newPass( name );
82	using namespace Stats::Counters;
83	{
84	static auto group = build<CounterGroup>( "Pass Visitor" );
85	auto pass = build<CounterGroup>( name, group );
86	pass_visitor_stats.depth = 0;
87	pass_visitor_stats.avg = build<AverageCounter<double>>( "Average Depth", pass );
88	pass_visitor_stats.max = build<MaxCounter<double>>( "Max Depth", pass );
89	}
90	{
91	static auto group = build<CounterGroup>( "Syntax Node" );
92	auto pass = build<CounterGroup>( name, group );
93	BaseSyntaxNode::new_nodes = build<SimpleCounter>( "Allocs", pass );
94	}
95	}
96
97	#define PASS( name, pass ) \
98	if ( errorp ) { cerr << name << endl; } \
99	NewPass(name); \
100	Stats::Time::StartBlock(name); \
101	pass; \
102	Stats::Time::StopBlock();
103
104	LinkageSpec::Spec linkage = LinkageSpec::Cforall;
105	TypedefTable typedefTable;
106	DeclarationNode * parseTree = nullptr; // program parse tree
107
108	static bool waiting_for_gdb = false; // flag to set cfa-cpp to wait for gdb on start
109
110	static string PreludeDirector = "";
111
112	static void parse_cmdline( int argc, char * argv[] );
113	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit = false );
114	static void dump( list< Declaration * > & translationUnit, ostream & out = cout );
115	static void dump( ast::TranslationUnit && transUnit, ostream & out = cout );
116
117	static void backtrace( int start ) { // skip first N stack frames
118	enum { Frames = 50, }; // maximum number of stack frames
119	void * array[Frames];
120	size_t size = ::backtrace( array, Frames );
121	char ** messages = ::backtrace_symbols( array, size ); // does not demangle names
122
123	*index( messages[0], '(' ) = '\0'; // find executable name
124	cerr << "Stack back trace for: " << messages[0] << endl;
125
126	// skip last 2 stack frames after main
127	for ( unsigned int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
128	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
129
130	for ( char * p = messages[i]; *p; p += 1 ) { // find parantheses and +offset
131	if ( *p == '(' ) {
132	mangled_name = p;
133	} else if ( *p == '+' ) {
134	offset_begin = p;
135	} else if ( *p == ')' ) {
136	offset_end = p;
137	break;
138	} // if
139	} // for
140
141	// if line contains symbol, attempt to demangle
142	int frameNo = i - start;
143	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
144	*mangled_name++ = '\0'; // delimit strings
145	*offset_begin++ = '\0';
146	*offset_end++ = '\0';
147
148	int status;
149	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
150	// bug in __cxa_demangle for single-character lower-case non-mangled names
151	if ( status == 0 ) { // demangling successful ?
152	cerr << "(" << frameNo << ") " << messages[i] << " : "
153	<< real_name << "+" << offset_begin << offset_end << endl;
154	} else { // otherwise, output mangled name
155	cerr << "(" << frameNo << ") " << messages[i] << " : "
156	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
157	} // if
158
159	free( real_name );
160	} else { // otherwise, print the whole line
161	cerr << "(" << frameNo << ") " << messages[i] << endl;
162	} // if
163	} // for
164
165	free( messages );
166	} // backtrace
167
168	#define SIGPARMS int sig __attribute__(( unused )), siginfo_t * sfp __attribute__(( unused )), ucontext_t * cxt __attribute__(( unused ))
169
170	static void _Signal(struct sigaction & act, int sig, int flags ) {
171	act.sa_flags = flags;
172
173	if ( sigaction( sig, &act, nullptr ) == -1 ) {
174	cerr << "cfa-cpp compilation error problem installing signal handler, error(" << errno << ") " << strerror( errno ) << endl;
175	_exit( EXIT_FAILURE );
176	} // if
177	}
178
179	static void Signal( int sig, void (* handler)(SIGPARMS), int flags ) {
180	struct sigaction act;
181	act.sa_sigaction = (void ()(int, siginfo_t , void *))handler;
182	_Signal(act, sig, flags);
183	} // Signal
184
185	static void Signal( int sig, void (* handler)(int), int flags ) {
186	struct sigaction act;
187	act.sa_handler = handler;
188	_Signal(act, sig, flags);
189	} // Signal
190
191	static void sigSegvBusHandler( SIGPARMS ) {
192	if ( sfp->si_addr == nullptr ) {
193	cerr << "Null pointer (nullptr) dereference." << endl;
194	} else {
195	cerr << (sig == SIGSEGV ? "Segment fault" : "Bus error") << " at memory location " << sfp->si_addr << "." << endl
196	<< "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;
197	} // if
198	backtrace( 2 ); // skip first 2 stack frames
199	abort(); // cause core dump for debugging
200	} // sigSegvBusHandler
201
202	static void sigFpeHandler( SIGPARMS ) {
203	const char * msg;
204
205	switch ( sfp->si_code ) {
206	case FPE_INTDIV: case FPE_FLTDIV: msg = "divide by zero"; break;
207	case FPE_FLTOVF: msg = "overflow"; break;
208	case FPE_FLTUND: msg = "underflow"; break;
209	case FPE_FLTRES: msg = "inexact result"; break;
210	case FPE_FLTINV: msg = "invalid operation"; break;
211	default: msg = "unknown";
212	} // choose
213	cerr << "Computation error " << msg << " at location " << sfp->si_addr << endl
214	<< "Possible cause is constant-expression evaluation invalid." << endl;
215	backtrace( 2 ); // skip first 2 stack frames
216	abort(); // cause core dump for debugging
217	} // sigFpeHandler
218
219	static void sigAbortHandler( SIGPARMS ) {
220	backtrace( 6 ); // skip first 6 stack frames
221	Signal( SIGABRT, SIG_DFL, SA_SIGINFO ); // reset default signal handler
222	raise( SIGABRT ); // reraise SIGABRT
223	} // sigAbortHandler
224
225	int main( int argc, char * argv[] ) {
226	FILE * input; // use FILE rather than istream because yyin is FILE
227	ostream * output = & cout;
228	list< Declaration * > translationUnit;
229
230	Signal( SIGSEGV, sigSegvBusHandler, SA_SIGINFO );
231	Signal( SIGBUS, sigSegvBusHandler, SA_SIGINFO );
232	Signal( SIGFPE, sigFpeHandler, SA_SIGINFO );
233	Signal( SIGABRT, sigAbortHandler, SA_SIGINFO );
234
235	// cout << "main" << endl;
236	// for ( int i = 0; i < argc; i += 1 ) {
237	// cout << '\t' << argv[i] << endl;
238	// } // for
239
240	parse_cmdline( argc, argv ); // process command-line arguments
241	CodeGen::FixMain::setReplaceMain( !nomainp );
242
243	if ( waiting_for_gdb ) {
244	cerr << "Waiting for gdb" << endl;
245	cerr << "run :" << endl;
246	cerr << " gdb attach " << getpid() << endl;
247	raise(SIGSTOP);
248	} // if
249
250	try {
251	// choose to read the program from a file or stdin
252	if ( optind < argc ) { // any commands after the flags ? => input file name
253	input = fopen( argv[ optind ], "r" );
254	assertf( input, "cannot open %s because %s\n", argv[ optind ], strerror( errno ) );
255	optind += 1;
256	} else { // no input file name
257	input = stdin;
258	} // if
259
260	Stats::Time::StartGlobal();
261	NewPass("Parse");
262	Stats::Time::StartBlock("Parse");
263
264	// read in the builtins, extras, and the prelude
265	if ( ! nopreludep ) { // include gcc builtins
266	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
267
268	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
269
270	// Read to gcc builtins, if not generating the cfa library
271	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cf").c_str(), "r" );
272	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
273	parse( gcc_builtins, LinkageSpec::Compiler );
274
275	// read the extra prelude in, if not generating the cfa library
276	FILE * extras = fopen( (PreludeDirector + "/extras.cf").c_str(), "r" );
277	assertf( extras, "cannot open extras.cf\n" );
278	parse( extras, LinkageSpec::BuiltinC );
279
280	if ( ! libcfap ) {
281	// read the prelude in, if not generating the cfa library
282	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
283	assertf( prelude, "cannot open prelude.cfa\n" );
284	parse( prelude, LinkageSpec::Intrinsic );
285
286	// Read to cfa builtins, if not generating the cfa library
287	FILE * builtins = fopen( (PreludeDirector + "/builtins.cf").c_str(), "r" );
288	assertf( builtins, "cannot open builtins.cf\n" );
289	parse( builtins, LinkageSpec::BuiltinCFA );
290	} // if
291	} // if
292
293	parse( input, libcfap ? LinkageSpec::Intrinsic : LinkageSpec::Cforall, yydebug );
294
295	if ( parsep ) {
296	parseTree->printList( cout );
297	delete parseTree;
298	return EXIT_SUCCESS;
299	} // if
300
301	buildList( parseTree, translationUnit );
302	delete parseTree;
303	parseTree = nullptr;
304
305	if ( astp ) {
306	dump( translationUnit );
307	return EXIT_SUCCESS;
308	} // if
309
310	// Temporary: fill locations after parsing so that every node has a location, for early error messages.
311	// Eventually we should pass the locations from the parser to every node, but this quick and dirty solution
312	// works okay for now.
313	CodeTools::fillLocations( translationUnit );
314	Stats::Time::StopBlock();
315
316	PASS( "Translate Exception Declarations", ControlStruct::translateExcept( translationUnit ) );
317	if ( exdeclp ) {
318	dump( translationUnit );
319	return EXIT_SUCCESS;
320	} // if
321
322	// add the assignment statement after the initialization of a type parameter
323	PASS( "Validate-A", SymTab::validate_A( translationUnit ) );
324	PASS( "Validate-B", SymTab::validate_B( translationUnit ) );
325	PASS( "Validate-C", SymTab::validate_C( translationUnit ) );
326	PASS( "Validate-D", SymTab::validate_D( translationUnit ) );
327	PASS( "Validate-E", SymTab::validate_E( translationUnit ) );
328
329	CodeTools::fillLocations( translationUnit );
330
331	if( useNewAST ) {
332	if (Stats::Counters::enabled) {
333	ast::pass_visitor_stats.avg = Stats::Counters::build<Stats::Counters::AverageCounter<double>>("Average Depth - New");
334	ast::pass_visitor_stats.max = Stats::Counters::build<Stats::Counters::MaxCounter<double>>("Max depth - New");
335	}
336	auto transUnit = convert( move( translationUnit ) );
337
338	forceFillCodeLocations( transUnit );
339
340	PASS( "Set Length From Initializer", Validate::setLengthFromInitializer( transUnit ) );
341	PASS( "Find Global Decls", Validate::findGlobalDecls( transUnit ) );
342	PASS( "Fix Label Address", Validate::fixLabelAddresses( transUnit ) );
343
344	if ( symtabp ) {
345	return EXIT_SUCCESS;
346	} // if
347
348	if ( expraltp ) {
349	ResolvExpr::printCandidates( transUnit );
350	return EXIT_SUCCESS;
351	} // if
352
353	if ( validp ) {
354	dump( move( transUnit ) );
355	return EXIT_SUCCESS;
356	} // if
357
358	PASS( "Translate Throws", ControlStruct::translateThrows( transUnit ) );
359	PASS( "Fix Labels", ControlStruct::fixLabels( transUnit ) );
360	PASS( "Fix Names", CodeGen::fixNames( transUnit ) );
361	PASS( "Gen Init", InitTweak::genInit( transUnit ) );
362	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( transUnit ) );
363
364	if ( libcfap ) {
365	// Generate the bodies of cfa library functions.
366	LibCfa::makeLibCfa( transUnit );
367	} // if
368
369	if ( declstatsp ) {
370	printDeclStats( transUnit );
371	return EXIT_SUCCESS;
372	} // if
373
374	if ( bresolvep ) {
375	dump( move( transUnit ) );
376	return EXIT_SUCCESS;
377	} // if
378
379	if ( resolvprotop ) {
380	dumpAsResolverProto( transUnit );
381	return EXIT_SUCCESS;
382	} // if
383
384	PASS( "Resolve", ResolvExpr::resolve( transUnit ) );
385	if ( exprp ) {
386	dump( move( transUnit ) );
387	return EXIT_SUCCESS;
388	} // if
389
390	forceFillCodeLocations( transUnit );
391
392	PASS( "Fix Init", InitTweak::fix(transUnit, buildingLibrary()));
393
394	// fix ObjectDecl - replaces ConstructorInit nodes
395	if ( ctorinitp ) {
396	dump( move( transUnit ) );
397	return EXIT_SUCCESS;
398	} // if
399
400	// Currently not working due to unresolved issues with UniqueExpr
401	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
402	translationUnit = convert( move( transUnit ) );
403	} else {
404	PASS( "Validate-F", SymTab::validate_F( translationUnit ) );
405
406	if ( symtabp ) {
407	deleteAll( translationUnit );
408	return EXIT_SUCCESS;
409	} // if
410
411	if ( expraltp ) {
412	PassVisitor<ResolvExpr::AlternativePrinter> printer( cout );
413	acceptAll( translationUnit, printer );
414	return EXIT_SUCCESS;
415	} // if
416
417	if ( validp ) {
418	dump( translationUnit );
419	return EXIT_SUCCESS;
420	} // if
421
422	PASS( "Translate Throws", ControlStruct::translateThrows( translationUnit ) );
423	PASS( "Fix Labels", ControlStruct::fixLabels( translationUnit ) );
424	PASS( "Fix Names", CodeGen::fixNames( translationUnit ) );
425	PASS( "Gen Init", InitTweak::genInit( translationUnit ) );
426	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( translationUnit ) );
427
428	if ( libcfap ) {
429	// Generate the bodies of cfa library functions.
430	LibCfa::makeLibCfa( translationUnit );
431	} // if
432
433	if ( declstatsp ) {
434	CodeTools::printDeclStats( translationUnit );
435	deleteAll( translationUnit );
436	return EXIT_SUCCESS;
437	} // if
438
439	if ( bresolvep ) {
440	dump( translationUnit );
441	return EXIT_SUCCESS;
442	} // if
443
444	CodeTools::fillLocations( translationUnit );
445
446	if ( resolvprotop ) {
447	CodeTools::dumpAsResolvProto( translationUnit );
448	return EXIT_SUCCESS;
449	} // if
450
451	PASS( "Resolve", ResolvExpr::resolve( translationUnit ) );
452	if ( exprp ) {
453	dump( translationUnit );
454	return EXIT_SUCCESS;
455	}
456
457	PASS( "Fix Init", InitTweak::fix( translationUnit, buildingLibrary() ) );
458
459	// fix ObjectDecl - replaces ConstructorInit nodes
460	if ( ctorinitp ) {
461	dump ( translationUnit );
462	return EXIT_SUCCESS;
463	} // if
464
465	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
466	}
467
468	PASS( "Translate Tries" , ControlStruct::translateTries( translationUnit ) );
469
470	PASS( "Gen Waitfor" , Concurrency::generateWaitFor( translationUnit ) );
471
472	PASS( "Convert Specializations", GenPoly::convertSpecializations( translationUnit ) ); // needs to happen before tuple types are expanded
473
474	PASS( "Expand Tuples", Tuples::expandTuples( translationUnit ) ); // xxx - is this the right place for this?
475
476	if ( tuplep ) {
477	dump( translationUnit );
478	return EXIT_SUCCESS;
479	} // if
480
481	PASS( "Virtual Expand Casts", Virtual::expandCasts( translationUnit ) ); // Must come after translateEHM
482
483	PASS( "Instantiate Generics", GenPoly::instantiateGeneric( translationUnit ) );
484	if ( genericsp ) {
485	dump( translationUnit );
486	return EXIT_SUCCESS;
487	} // if
488
489	PASS( "Convert L-Value", GenPoly::convertLvalue( translationUnit ) );
490
491	if ( bboxp ) {
492	dump( translationUnit );
493	return EXIT_SUCCESS;
494	} // if
495	PASS( "Box", GenPoly::box( translationUnit ) );
496
497	PASS( "Link-Once", CodeGen::translateLinkOnce( translationUnit ) );
498
499	// Code has been lowered to C, now we can start generation.
500
501	if ( bcodegenp ) {
502	dump( translationUnit );
503	return EXIT_SUCCESS;
504	} // if
505
506	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
507	output = new ofstream( argv[ optind ] );
508	} // if
509
510	CodeTools::fillLocations( translationUnit );
511	PASS( "Code Gen", CodeGen::generate( translationUnit, *output, ! genproto, prettycodegenp, true, linemarks ) );
512
513	CodeGen::FixMain::fix( translationUnit, *output,
514	(PreludeDirector + "/bootloader.c").c_str() );
515	if ( output != &cout ) {
516	delete output;
517	} // if
518	} catch ( SemanticErrorException & e ) {
519	if ( errorp ) {
520	cerr << "---AST at error:---" << endl;
521	dump( translationUnit, cerr );
522	cerr << endl << "---End of AST, begin error message:---\n" << endl;
523	} // if
524	e.print();
525	if ( output != &cout ) {
526	delete output;
527	} // if
528	return EXIT_FAILURE;
529	} catch ( UnimplementedError & e ) {
530	cout << "Sorry, " << e.get_what() << " is not currently implemented" << endl;
531	if ( output != &cout ) {
532	delete output;
533	} // if
534	return EXIT_FAILURE;
535	} catch ( CompilerError & e ) {
536	cerr << "Compiler Error: " << e.get_what() << endl;
537	cerr << "(please report bugs to [REDACTED])" << endl;
538	if ( output != &cout ) {
539	delete output;
540	} // if
541	return EXIT_FAILURE;
542	} catch ( std::bad_alloc & ) {
543	cerr << "cfa-cpp compilation error std::bad_alloc" << endl;
544	backtrace( 1 );
545	abort();
546	} catch ( ... ) {
547	exception_ptr eptr = current_exception();
548	try {
549	if (eptr) {
550	rethrow_exception(eptr);
551	} else {
552	cerr << "cfa-cpp compilation error exception uncaught and unknown" << endl;
553	} // if
554	} catch( const exception & e ) {
555	cerr << "cfa-cpp compilation error uncaught exception \"" << e.what() << "\"\n";
556	} // try
557	return EXIT_FAILURE;
558	} // try
559
560	deleteAll( translationUnit );
561	Stats::print();
562	return EXIT_SUCCESS;
563	} // main
564
565
566	static const char optstring[] = ":c:ghlLmNnpdOAP:S:twW:D:";
567
568	enum { PreludeDir = 128 };
569	static struct option long_opts[] = {
570	{ "colors", required_argument, nullptr, 'c' },
571	{ "gdb", no_argument, nullptr, 'g' },
572	{ "help", no_argument, nullptr, 'h' },
573	{ "libcfa", no_argument, nullptr, 'l' },
574	{ "linemarks", no_argument, nullptr, 'L' },
575	{ "no-main", no_argument, 0, 'm' },
576	{ "no-linemarks", no_argument, nullptr, 'N' },
577	{ "no-prelude", no_argument, nullptr, 'n' },
578	{ "prototypes", no_argument, nullptr, 'p' },
579	{ "deterministic-out", no_argument, nullptr, 'd' },
580	{ "old-ast", no_argument, nullptr, 'O'},
581	{ "new-ast", no_argument, nullptr, 'A'},
582	{ "print", required_argument, nullptr, 'P' },
583	{ "prelude-dir", required_argument, nullptr, PreludeDir },
584	{ "statistics", required_argument, nullptr, 'S' },
585	{ "tree", no_argument, nullptr, 't' },
586	{ "", no_argument, nullptr, 0 }, // -w
587	{ "", no_argument, nullptr, 0 }, // -W
588	{ "", no_argument, nullptr, 0 }, // -D
589	{ nullptr, 0, nullptr, 0 }
590	}; // long_opts
591
592	static const char * description[] = {
593	"diagnostic color: never, always, auto", // -c
594	"wait for gdb to attach", // -g
595	"print translator help message", // -h
596	"generate libcfa.c", // -l
597	"generate line marks", // -L
598	"do not replace main", // -m
599	"do not generate line marks", // -N
600	"do not read prelude", // -n
601	"do not generate prelude prototypes => prelude not printed", // -p
602	"only print deterministic output", // -d
603	"Use the old-ast", // -O
604	"Use the new-ast", // -A
605	"print", // -P
606	"<directory> prelude directory for debug/nodebug", // no flag
607	"<option-list> enable profiling information: counters, heap, time, all, none", // -S
608	"building cfa standard lib", // -t
609	"", // -w
610	"", // -W
611	"", // -D
612	}; // description
613
614	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
615
616	static struct Printopts {
617	const char * name;
618	int & flag;
619	int val;
620	const char * descript;
621	} printopts[] = {
622	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
623	{ "asterr", errorp, true, "print AST on error" },
624	{ "declstats", declstatsp, true, "code property statistics" },
625	{ "parse", yydebug, true, "yacc (parsing) debug information" },
626	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
627	{ "rproto", resolvprotop, true, "resolver-proto instance" },
628	{ "rsteps", resolvep, true, "print resolver steps" },
629	{ "tree", parsep, true, "print parse tree" },
630	// code dumps
631	{ "ast", astp, true, "print AST after parsing" },
632	{ "exdecl", exdeclp, true, "print AST after translating exception decls" },
633	{ "symevt", symtabp, true, "print AST after symbol table events" },
634	{ "altexpr", expraltp, true, "print alternatives for expressions" },
635	{ "astdecl", validp, true, "print AST after declaration validation pass" },
636	{ "resolver", bresolvep, true, "print AST before resolver step" },
637	{ "astexpr", exprp, true, "print AST after expression analysis" },
638	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
639	{ "tuple", tuplep, true, "print AST after tuple expansion" },
640	{ "astgen", genericsp, true, "print AST after instantiate generics" },
641	{ "box", bboxp, true, "print AST before box step" },
642	{ "codegen", bcodegenp, true, "print AST before code generation" },
643	};
644	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
645
646	static void usage( char * argv[] ) {
647	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
648	int i = 0, j = 1; // j skips starting colon
649	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
650	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
651	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
652	cout << " -" << optstring[j] << ",";
653	} else { // no flag
654	j -= 1; // compensate
655	cout << " ";
656	} // if
657	cout << " --" << left << setw(12) << long_opts[i].name << " ";
658	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
659	cout << "one of: " << endl;
660	for ( int i = 0; i < printoptsSize; i += 1 ) {
661	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
662	} // for
663	} else {
664	cout << description[i] << endl;
665	} // if
666	} // if
667	if ( optstring[j + 1] == ':' ) j += 1;
668	} // for
669	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
670	exit( EXIT_FAILURE );
671	} // usage
672
673	static void parse_cmdline( int argc, char * argv[] ) {
674	opterr = 0; // (global) prevent getopt from printing error messages
675
676	bool Wsuppress = false, Werror = false;
677	int c;
678	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
679	switch ( c ) {
680	case 'c': // diagnostic colors
681	if ( strcmp( optarg, "always" ) == 0 ) {
682	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
683	} else if ( strcmp( optarg, "never" ) == 0 ) {
684	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
685	} else if ( strcmp( optarg, "auto" ) == 0 ) {
686	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
687	} // if
688	break;
689	case 'h': // help message
690	usage( argv ); // no return
691	break;
692	case 'l': // generate libcfa.c
693	libcfap = true;
694	break;
695	case 'L': // generate line marks
696	linemarks = true;
697	break;
698	case 'm': // do not replace main
699	nomainp = true;
700	break;
701	case 'N': // do not generate line marks
702	linemarks = false;
703	break;
704	case 'n': // do not read prelude
705	nopreludep = true;
706	break;
707	case 'p': // generate prototypes for prelude functions
708	genproto = true;
709	break;
710	case 'd': // don't print non-deterministic output
711	deterministic_output = true;
712	break;
713	case 'O': // don't print non-deterministic output
714	useNewAST = false;
715	break;
716	case 'A': // don't print non-deterministic output
717	useNewAST = true;
718	break;
719	case 'P': // print options
720	for ( int i = 0;; i += 1 ) {
721	if ( i == printoptsSize ) {
722	cout << "Unknown --print option " << optarg << endl;
723	goto Default;
724	} // if
725	if ( strcmp( optarg, printopts[i].name ) == 0 ) {
726	printopts[i].flag = printopts[i].val;
727	break;
728	} // if
729	} // for
730	break;
731	case PreludeDir: // prelude directory for debug/nodebug, hidden
732	PreludeDirector = optarg;
733	break;
734	case 'S': // enable profiling information, argument comma separated list of names
735	Stats::parse_params( optarg );
736	break;
737	case 't': // building cfa stdlib
738	treep = true;
739	break;
740	case 'g': // wait for gdb
741	waiting_for_gdb = true;
742	break;
743	case 'w': // suppress all warnings, hidden
744	Wsuppress = true;
745	break;
746	case 'W': // coordinate gcc -W with CFA, hidden
747	if ( strcmp( optarg, "all" ) == 0 ) {
748	SemanticWarning_EnableAll();
749	} else if ( strcmp( optarg, "error" ) == 0 ) {
750	Werror = true;
751	} else {
752	char * warning = optarg;
753	Severity s;
754	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
755	warning += 3;
756	s = Severity::Suppress;
757	} else {
758	s = Severity::Warn;
759	} // if
760	SemanticWarning_Set( warning, s );
761	} // if
762	break;
763	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
764	break;
765	case '?': // unknown option
766	if ( optopt ) { // short option ?
767	cout << "Unknown option -" << (char)optopt << endl;
768	} else {
769	cout << "Unknown option " << argv[optind - 1] << endl;
770	} // if
771	goto Default;
772	case ':': // missing option
773	if ( optopt ) { // short option ?
774	cout << "Missing option for -" << (char)optopt << endl;
775	} else {
776	cout << "Missing option for " << argv[optind - 1] << endl;
777	} // if
778	goto Default;
779	Default:
780	default:
781	usage( argv ); // no return
782	} // switch
783	} // while
784
785	if ( Werror ) {
786	SemanticWarning_WarningAsError();
787	} // if
788	if ( Wsuppress ) {
789	SemanticWarning_SuppressAll();
790	} // if
791	// for ( const auto w : WarningFormats ) {
792	// cout << w.name << ' ' << (int)w.severity << endl;
793	// } // for
794	} // parse_cmdline
795
796	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit ) {
797	extern int yyparse( void );
798	extern FILE * yyin;
799	extern int yylineno;
800
801	::linkage = linkage; // set globals
802	yyin = input;
803	yylineno = 1;
804	int parseStatus = yyparse();
805
806	fclose( input );
807	if ( shouldExit \|\| parseStatus != 0 ) {
808	exit( parseStatus );
809	} // if
810	} // parse
811
812	static bool notPrelude( Declaration * decl ) {
813	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
814	} // notPrelude
815
816	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
817	list< Declaration * > decls;
818
819	if ( genproto ) {
820	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
821	} else {
822	decls = translationUnit;
823	} // if
824
825	// depending on commandline options, either generate code or dump the AST
826	if ( codegenp ) {
827	CodeGen::generate( decls, out, ! genproto, prettycodegenp );
828	} else {
829	printAll( decls, out );
830	} // if
831	deleteAll( translationUnit );
832	} // dump
833
834	static void dump( ast::TranslationUnit && transUnit, ostream & out ) {
835	std::list< Declaration * > translationUnit = convert( move( transUnit ) );
836	dump( translationUnit, out );
837	}
838
839	// Local Variables: //
840	// tab-width: 4 //
841	// mode: c++ //
842	// compile-command: "make install" //
843	// End: //

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