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source: src/main.cc @ eb8d791

ADTast-experimental

Last change on this file since eb8d791 was eb8d791, checked in by Andrew Beach <ajbeach@…>, 13 months ago
CandidateFinder? fills in the CodeLocation? on a generated expression. With that and recent changes, the fills seem to be redundent now, so I removed them.
Property mode set to `100644`
File size: 28.5 KB

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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 : Peter A. Buhr
12	// Last Modified On : Mon Apr 10 21:12:17 2023
13	// Update Count : 682
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/TrackLoc.h" // for fillLocations
41	#include "Common/CodeLocationTools.hpp" // for forceFillCodeLocations
42	#include "Common/DeclStats.hpp" // for printDeclStats
43	#include "Common/ResolvProtoDump.hpp" // for dumpAsResolverProto
44	#include "Common/Stats.h" // for Stats
45	#include "Common/utility.h" // for deleteAll, filter, printAll
46	#include "Concurrency/Actors.hpp" // for implementActors
47	#include "Concurrency/Keywords.h" // for implementMutex, implement...
48	#include "Concurrency/Waitfor.h" // for generateWaitfor
49	#include "ControlStruct/ExceptDecl.h" // for translateExcept
50	#include "ControlStruct/ExceptTranslate.h" // for translateThrows, translat...
51	#include "ControlStruct/FixLabels.hpp" // for fixLabels
52	#include "ControlStruct/HoistControlDecls.hpp" // hoistControlDecls
53	#include "GenPoly/Box.h" // for box
54	#include "GenPoly/InstantiateGeneric.h" // for instantiateGeneric
55	#include "GenPoly/Lvalue.h" // for convertLvalue
56	#include "GenPoly/Specialize.h" // for convertSpecializations
57	#include "InitTweak/FixInit.h" // for fix
58	#include "InitTweak/GenInit.h" // for genInit
59	#include "MakeLibCfa.h" // for makeLibCfa
60	#include "Parser/RunParser.hpp" // for buildList, dumpParseTree,...
61	#include "ResolvExpr/CandidatePrinter.hpp" // for printCandidates
62	#include "ResolvExpr/Resolver.h" // for resolve
63	#include "SynTree/LinkageSpec.h" // for Spec, Cforall, Intrinsic
64	#include "SynTree/Declaration.h" // for Declaration
65	#include "Tuples/Tuples.h" // for expandMemberTuples, expan...
66	#include "Validate/Autogen.hpp" // for autogenerateRoutines
67	#include "Validate/CompoundLiteral.hpp" // for handleCompoundLiterals
68	#include "Validate/EliminateTypedef.hpp" // for eliminateTypedef
69	#include "Validate/EnumAndPointerDecay.hpp" // for decayEnumsAndPointers
70	#include "Validate/FindSpecialDecls.h" // for findGlobalDecls
71	#include "Validate/FixQualifiedTypes.hpp" // for fixQualifiedTypes
72	#include "Validate/FixReturnTypes.hpp" // for fixReturnTypes
73	#include "Validate/ForallPointerDecay.hpp" // for decayForallPointers
74	#include "Validate/GenericParameter.hpp" // for fillGenericParameters, tr...
75	#include "Validate/HoistStruct.hpp" // for hoistStruct
76	#include "Validate/HoistTypeDecls.hpp" // for hoistTypeDecls
77	#include "Validate/InitializerLength.hpp" // for setLengthFromInitializer
78	#include "Validate/LabelAddressFixer.hpp" // for fixLabelAddresses
79	#include "Validate/LinkReferenceToTypes.hpp" // for linkReferenceToTypes
80	#include "Validate/ReplaceTypedef.hpp" // for replaceTypedef
81	#include "Validate/ReturnCheck.hpp" // for checkReturnStatements
82	#include "Validate/VerifyCtorDtorAssign.hpp" // for verifyCtorDtorAssign
83	#include "Virtual/ExpandCasts.h" // for expandCasts
84	#include "Virtual/VirtualDtor.hpp" // for implementVirtDtors
85
86	static void NewPass( const char * const name ) {
87	Stats::Heap::newPass( name );
88	using namespace Stats::Counters;
89	{
90	static auto group = build<CounterGroup>( "Pass Visitor" );
91	auto pass = build<CounterGroup>( name, group );
92	pass_visitor_stats.depth = 0;
93	pass_visitor_stats.avg = build<AverageCounter<double>>( "Average Depth", pass );
94	pass_visitor_stats.max = build<MaxCounter<double>>( "Max Depth", pass );
95	}
96	{
97	static auto group = build<CounterGroup>( "Syntax Node" );
98	auto pass = build<CounterGroup>( name, group );
99	BaseSyntaxNode::new_nodes = build<SimpleCounter>( "Allocs", pass );
100	}
101	}
102
103	#define PASS( name, pass ) \
104	if ( errorp ) { cerr << name << endl; } \
105	NewPass(name); \
106	Stats::Time::StartBlock(name); \
107	pass; \
108	Stats::Time::StopBlock();
109
110	static bool waiting_for_gdb = false; // flag to set cfa-cpp to wait for gdb on start
111
112	static string PreludeDirector = "";
113
114	static void parse_cmdline( int argc, char * argv[] );
115	static void dump( list< Declaration * > & translationUnit, ostream & out = cout );
116	static void dump( ast::TranslationUnit && transUnit, ostream & out = cout );
117
118	static void backtrace( int start ) { // skip first N stack frames
119	enum { Frames = 50, }; // maximum number of stack frames
120	void * array[Frames];
121	size_t size = ::backtrace( array, Frames );
122	char ** messages = ::backtrace_symbols( array, size ); // does not demangle names
123
124	*index( messages[0], '(' ) = '\0'; // find executable name
125	cerr << "Stack back trace for: " << messages[0] << endl;
126
127	// skip last 2 stack frames after main
128	for ( unsigned int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
129	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
130
131	for ( char * p = messages[i]; *p; p += 1 ) { // find parantheses and +offset
132	if ( *p == '(' ) {
133	mangled_name = p;
134	} else if ( *p == '+' ) {
135	offset_begin = p;
136	} else if ( *p == ')' ) {
137	offset_end = p;
138	break;
139	} // if
140	} // for
141
142	// if line contains symbol, attempt to demangle
143	int frameNo = i - start;
144	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
145	*mangled_name++ = '\0'; // delimit strings
146	*offset_begin++ = '\0';
147	*offset_end++ = '\0';
148
149	int status;
150	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
151	// bug in __cxa_demangle for single-character lower-case non-mangled names
152	if ( status == 0 ) { // demangling successful ?
153	cerr << "(" << frameNo << ") " << messages[i] << " : "
154	<< real_name << "+" << offset_begin << offset_end << endl;
155	} else { // otherwise, output mangled name
156	cerr << "(" << frameNo << ") " << messages[i] << " : "
157	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
158	} // if
159
160	free( real_name );
161	} else { // otherwise, print the whole line
162	cerr << "(" << frameNo << ") " << messages[i] << endl;
163	} // if
164	} // for
165
166	free( messages );
167	} // backtrace
168
169	#define SIGPARMS int sig __attribute__(( unused )), siginfo_t * sfp __attribute__(( unused )), ucontext_t * cxt __attribute__(( unused ))
170
171	static void _Signal(struct sigaction & act, int sig, int flags ) {
172	act.sa_flags = flags;
173
174	if ( sigaction( sig, &act, nullptr ) == -1 ) {
175	cerr << "cfa-cpp compilation error problem installing signal handler, error(" << errno << ") " << strerror( errno ) << endl;
176	_exit( EXIT_FAILURE );
177	} // if
178	}
179
180	static void Signal( int sig, void (* handler)(SIGPARMS), int flags ) {
181	struct sigaction act;
182	act.sa_sigaction = (void ()(int, siginfo_t , void *))handler;
183	_Signal(act, sig, flags);
184	} // Signal
185
186	static void Signal( int sig, void (* handler)(int), int flags ) {
187	struct sigaction act;
188	act.sa_handler = handler;
189	_Signal(act, sig, flags);
190	} // Signal
191
192	static void sigSegvBusHandler( SIGPARMS ) {
193	if ( sfp->si_addr == nullptr ) {
194	cerr << "Null pointer (nullptr) dereference." << endl;
195	} else {
196	cerr << (sig == SIGSEGV ? "Segment fault" : "Bus error") << " at memory location " << sfp->si_addr << "." << endl
197	<< "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;
198	} // if
199	backtrace( 2 ); // skip first 2 stack frames
200	abort(); // cause core dump for debugging
201	} // sigSegvBusHandler
202
203	static void sigFpeHandler( SIGPARMS ) {
204	const char * msg;
205
206	switch ( sfp->si_code ) {
207	case FPE_INTDIV: case FPE_FLTDIV: msg = "divide by zero"; break;
208	case FPE_FLTOVF: msg = "overflow"; break;
209	case FPE_FLTUND: msg = "underflow"; break;
210	case FPE_FLTRES: msg = "inexact result"; break;
211	case FPE_FLTINV: msg = "invalid operation"; break;
212	default: msg = "unknown";
213	} // choose
214	cerr << "Computation error " << msg << " at location " << sfp->si_addr << endl
215	<< "Possible cause is constant-expression evaluation invalid." << endl;
216	backtrace( 2 ); // skip first 2 stack frames
217	abort(); // cause core dump for debugging
218	} // sigFpeHandler
219
220	static void sigAbortHandler( SIGPARMS ) {
221	backtrace( 6 ); // skip first 6 stack frames
222	Signal( SIGABRT, SIG_DFL, SA_SIGINFO ); // reset default signal handler
223	raise( SIGABRT ); // reraise SIGABRT
224	} // sigAbortHandler
225
226	int main( int argc, char * argv[] ) {
227	FILE * input; // use FILE rather than istream because yyin is FILE
228	ostream * output = & cout;
229	list< Declaration * > translationUnit;
230	ast::TranslationUnit transUnit;
231
232	Signal( SIGSEGV, sigSegvBusHandler, SA_SIGINFO );
233	Signal( SIGBUS, sigSegvBusHandler, SA_SIGINFO );
234	Signal( SIGFPE, sigFpeHandler, SA_SIGINFO );
235	Signal( SIGABRT, sigAbortHandler, SA_SIGINFO );
236
237	// cout << "main" << endl;
238	// for ( int i = 0; i < argc; i += 1 ) {
239	// cout << '\t' << argv[i] << endl;
240	// } // for
241
242	parse_cmdline( argc, argv ); // process command-line arguments
243	CodeGen::FixMain::setReplaceMain( !nomainp );
244
245	if ( waiting_for_gdb ) {
246	cerr << "Waiting for gdb" << endl;
247	cerr << "run :" << endl;
248	cerr << " gdb attach " << getpid() << endl;
249	raise(SIGSTOP);
250	} // if
251
252	try {
253	// choose to read the program from a file or stdin
254	if ( optind < argc ) { // any commands after the flags ? => input file name
255	input = fopen( argv[ optind ], "r" );
256	assertf( input, "cannot open %s because %s\n", argv[ optind ], strerror( errno ) );
257	optind += 1;
258	} else { // no input file name
259	input = stdin;
260	} // if
261
262	Stats::Time::StartGlobal();
263	NewPass("Parse");
264	Stats::Time::StartBlock("Parse");
265
266	// read in the builtins, extras, and the prelude
267	if ( ! nopreludep ) { // include gcc builtins
268	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
269
270	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
271
272	// Read to gcc builtins, if not generating the cfa library
273	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cf").c_str(), "r" );
274	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
275	parse( gcc_builtins, ast::Linkage::Compiler );
276
277	// read the extra prelude in, if not generating the cfa library
278	FILE * extras = fopen( (PreludeDirector + "/extras.cf").c_str(), "r" );
279	assertf( extras, "cannot open extras.cf\n" );
280	parse( extras, ast::Linkage::BuiltinC );
281
282	if ( ! libcfap ) {
283	// read the prelude in, if not generating the cfa library
284	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
285	assertf( prelude, "cannot open prelude.cfa\n" );
286	parse( prelude, ast::Linkage::Intrinsic );
287
288	// Read to cfa builtins, if not generating the cfa library
289	FILE * builtins = fopen( (PreludeDirector + "/builtins.cf").c_str(), "r" );
290	assertf( builtins, "cannot open builtins.cf\n" );
291	parse( builtins, ast::Linkage::BuiltinCFA );
292	} // if
293	} // if
294
295	parse( input, libcfap ? ast::Linkage::Intrinsic : ast::Linkage::Cforall, yydebug );
296
297	transUnit = buildUnit();
298
299	if ( astp ) {
300	dump( std::move( transUnit ) );
301	return EXIT_SUCCESS;
302	} // if
303
304	Stats::Time::StopBlock();
305
306	if (Stats::Counters::enabled) {
307	ast::pass_visitor_stats.avg = Stats::Counters::build<Stats::Counters::AverageCounter<double>>("Average Depth - New");
308	ast::pass_visitor_stats.max = Stats::Counters::build<Stats::Counters::MaxCounter<double>>("Max depth - New");
309	}
310
311	PASS( "Hoist Type Decls", Validate::hoistTypeDecls( transUnit ) );
312
313	PASS( "Translate Exception Declarations", ControlStruct::translateExcept( transUnit ) );
314	if ( exdeclp ) {
315	dump( std::move( transUnit ) );
316	return EXIT_SUCCESS;
317	}
318
319	PASS( "Verify Ctor, Dtor & Assign", Validate::verifyCtorDtorAssign( transUnit ) );
320	PASS( "Replace Typedefs", Validate::replaceTypedef( transUnit ) );
321	PASS( "Fix Return Types", Validate::fixReturnTypes( transUnit ) );
322	PASS( "Enum and Pointer Decay", Validate::decayEnumsAndPointers( transUnit ) );
323
324	PASS( "Link Reference To Types", Validate::linkReferenceToTypes( transUnit ) );
325
326	PASS( "Fix Qualified Types", Validate::fixQualifiedTypes( transUnit ) );
327	PASS( "Hoist Struct", Validate::hoistStruct( transUnit ) );
328	PASS( "Eliminate Typedef", Validate::eliminateTypedef( transUnit ) );
329	PASS( "Validate Generic Parameters", Validate::fillGenericParameters( transUnit ) );
330	PASS( "Translate Dimensions", Validate::translateDimensionParameters( transUnit ) );
331	PASS( "Check Function Returns", Validate::checkReturnStatements( transUnit ) );
332	PASS( "Fix Return Statements", InitTweak::fixReturnStatements( transUnit ) );
333	PASS( "Implement Concurrent Keywords", Concurrency::implementKeywords( transUnit ) );
334	PASS( "Forall Pointer Decay", Validate::decayForallPointers( transUnit ) );
335	PASS( "Hoist Control Declarations", ControlStruct::hoistControlDecls( transUnit ) );
336
337	PASS( "Generate Autogen Routines", Validate::autogenerateRoutines( transUnit ) );
338
339	PASS( "Implement Actors", Concurrency::implementActors( transUnit ) );
340	PASS( "Implement Virtual Destructors", Virtual::implementVirtDtors(transUnit) );
341	PASS( "Implement Mutex", Concurrency::implementMutex( transUnit ) );
342	PASS( "Implement Thread Start", Concurrency::implementThreadStarter( transUnit ) );
343	PASS( "Compound Literal", Validate::handleCompoundLiterals( transUnit ) );
344	PASS( "Set Length From Initializer", Validate::setLengthFromInitializer( transUnit ) );
345	PASS( "Find Global Decls", Validate::findGlobalDecls( transUnit ) );
346	PASS( "Fix Label Address", Validate::fixLabelAddresses( transUnit ) );
347
348	if ( symtabp ) {
349	return EXIT_SUCCESS;
350	} // if
351
352	if ( expraltp ) {
353	ResolvExpr::printCandidates( transUnit );
354	return EXIT_SUCCESS;
355	} // if
356
357	if ( validp ) {
358	dump( std::move( transUnit ) );
359	return EXIT_SUCCESS;
360	} // if
361
362	PASS( "Translate Throws", ControlStruct::translateThrows( transUnit ) );
363	PASS( "Fix Labels", ControlStruct::fixLabels( transUnit ) );
364	PASS( "Fix Names", CodeGen::fixNames( transUnit ) );
365	PASS( "Gen Init", InitTweak::genInit( transUnit ) );
366	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( transUnit ) );
367
368	if ( libcfap ) {
369	// Generate the bodies of cfa library functions.
370	LibCfa::makeLibCfa( transUnit );
371	} // if
372
373	if ( declstatsp ) {
374	printDeclStats( transUnit );
375	return EXIT_SUCCESS;
376	} // if
377
378	if ( bresolvep ) {
379	dump( std::move( transUnit ) );
380	return EXIT_SUCCESS;
381	} // if
382
383	if ( resolvprotop ) {
384	dumpAsResolverProto( transUnit );
385	return EXIT_SUCCESS;
386	} // if
387
388	PASS( "Resolve", ResolvExpr::resolve( transUnit ) );
389	if ( exprp ) {
390	dump( std::move( transUnit ) );
391	return EXIT_SUCCESS;
392	} // if
393
394	PASS( "Fix Init", InitTweak::fix(transUnit, buildingLibrary()));
395
396	// fix ObjectDecl - replaces ConstructorInit nodes
397	if ( ctorinitp ) {
398	dump( std::move( transUnit ) );
399	return EXIT_SUCCESS;
400	} // if
401
402	// Currently not working due to unresolved issues with UniqueExpr
403	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
404
405	PASS( "Translate Tries", ControlStruct::translateTries( transUnit ) );
406	PASS( "Gen Waitfor", Concurrency::generateWaitFor( transUnit ) );
407
408	// Needs to happen before tuple types are expanded.
409	PASS( "Convert Specializations", GenPoly::convertSpecializations( transUnit ) );
410
411	PASS( "Expand Tuples", Tuples::expandTuples( transUnit ) );
412
413	if ( tuplep ) {
414	dump( std::move( transUnit ) );
415	return EXIT_SUCCESS;
416	} // if
417
418	// Must come after Translate Tries.
419	PASS( "Virtual Expand Casts", Virtual::expandCasts( transUnit ) );
420
421	PASS( "Instantiate Generics", GenPoly::instantiateGeneric( transUnit ) );
422	if ( genericsp ) {
423	dump( std::move( transUnit ) );
424	return EXIT_SUCCESS;
425	} // if
426
427	PASS( "Convert L-Value", GenPoly::convertLvalue( transUnit ) );
428
429	translationUnit = convert( std::move( transUnit ) );
430
431	if ( bboxp ) {
432	dump( translationUnit );
433	return EXIT_SUCCESS;
434	} // if
435	PASS( "Box", GenPoly::box( translationUnit ) );
436
437	PASS( "Link-Once", CodeGen::translateLinkOnce( translationUnit ) );
438
439	// Code has been lowered to C, now we can start generation.
440
441	if ( bcodegenp ) {
442	dump( translationUnit );
443	return EXIT_SUCCESS;
444	} // if
445
446	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
447	output = new ofstream( argv[ optind ] );
448	} // if
449
450	CodeTools::fillLocations( translationUnit );
451	PASS( "Code Gen", CodeGen::generate( translationUnit, *output, ! genproto, prettycodegenp, true, linemarks ) );
452
453	CodeGen::FixMain::fix( translationUnit, *output,
454	(PreludeDirector + "/bootloader.c").c_str() );
455	if ( output != &cout ) {
456	delete output;
457	} // if
458	} catch ( SemanticErrorException & e ) {
459	if ( errorp ) {
460	cerr << "---AST at error:---" << endl;
461	// We check which section the errors came from without looking at
462	// transUnit because std::move means it could look like anything.
463	if ( !translationUnit.empty() ) {
464	dump( translationUnit, cerr );
465	} else {
466	dump( std::move( transUnit ), cerr );
467	}
468	cerr << endl << "---End of AST, begin error message:---\n" << endl;
469	} // if
470	e.print();
471	if ( output != &cout ) {
472	delete output;
473	} // if
474	return EXIT_FAILURE;
475	} catch ( std::bad_alloc & ) {
476	cerr << "cfa-cpp compilation error std::bad_alloc" << endl;
477	backtrace( 1 );
478	abort();
479	} catch ( ... ) {
480	exception_ptr eptr = current_exception();
481	try {
482	if (eptr) {
483	rethrow_exception(eptr);
484	} else {
485	cerr << "cfa-cpp compilation error exception uncaught and unknown" << endl;
486	} // if
487	} catch( const exception & e ) {
488	cerr << "cfa-cpp compilation error uncaught exception \"" << e.what() << "\"\n";
489	} // try
490	return EXIT_FAILURE;
491	} // try
492
493	deleteAll( translationUnit );
494	Stats::print();
495	return EXIT_SUCCESS;
496	} // main
497
498
499	static const char optstring[] = ":c:ghilLmNnpdP:S:twW:D:";
500
501	enum { PreludeDir = 128 };
502	static struct option long_opts[] = {
503	{ "colors", required_argument, nullptr, 'c' },
504	{ "gdb", no_argument, nullptr, 'g' },
505	{ "help", no_argument, nullptr, 'h' },
506	{ "invariant", no_argument, nullptr, 'i' },
507	{ "libcfa", no_argument, nullptr, 'l' },
508	{ "linemarks", no_argument, nullptr, 'L' },
509	{ "no-main", no_argument, nullptr, 'm' },
510	{ "no-linemarks", no_argument, nullptr, 'N' },
511	{ "no-prelude", no_argument, nullptr, 'n' },
512	{ "prototypes", no_argument, nullptr, 'p' },
513	{ "deterministic-out", no_argument, nullptr, 'd' },
514	{ "print", required_argument, nullptr, 'P' },
515	{ "prelude-dir", required_argument, nullptr, PreludeDir },
516	{ "statistics", required_argument, nullptr, 'S' },
517	{ "tree", no_argument, nullptr, 't' },
518	{ "", no_argument, nullptr, 0 }, // -w
519	{ "", no_argument, nullptr, 0 }, // -W
520	{ "", no_argument, nullptr, 0 }, // -D
521	{ nullptr, 0, nullptr, 0 }
522	}; // long_opts
523
524	static const char * description[] = {
525	"diagnostic color: never, always, auto", // -c
526	"wait for gdb to attach", // -g
527	"print translator help message", // -h
528	"invariant checking during AST passes", // -i
529	"generate libcfa.c", // -l
530	"generate line marks", // -L
531	"do not replace main", // -m
532	"do not generate line marks", // -N
533	"do not read prelude", // -n
534	"do not generate prelude prototypes => prelude not printed", // -p
535	"only print deterministic output", // -d
536	"print", // -P
537	"<directory> prelude directory for debug/nodebug", // no flag
538	"<option-list> enable profiling information: counters, heap, time, all, none", // -S
539	"building cfa standard lib", // -t
540	"", // -w
541	"", // -W
542	"", // -D
543	}; // description
544
545	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
546
547	static struct Printopts {
548	const char * name;
549	int & flag;
550	int val;
551	const char * descript;
552	} printopts[] = {
553	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
554	{ "asterr", errorp, true, "print AST on error" },
555	{ "declstats", declstatsp, true, "code property statistics" },
556	{ "parse", yydebug, true, "yacc (parsing) debug information" },
557	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
558	{ "rproto", resolvprotop, true, "resolver-proto instance" },
559	{ "rsteps", resolvep, true, "print resolver steps" },
560	// code dumps
561	{ "ast", astp, true, "print AST after parsing" },
562	{ "exdecl", exdeclp, true, "print AST after translating exception decls" },
563	{ "symevt", symtabp, true, "print AST after symbol table events" },
564	{ "altexpr", expraltp, true, "print alternatives for expressions" },
565	{ "astdecl", validp, true, "print AST after declaration validation pass" },
566	{ "resolver", bresolvep, true, "print AST before resolver step" },
567	{ "astexpr", exprp, true, "print AST after expression analysis" },
568	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
569	{ "tuple", tuplep, true, "print AST after tuple expansion" },
570	{ "astgen", genericsp, true, "print AST after instantiate generics" },
571	{ "box", bboxp, true, "print AST before box step" },
572	{ "codegen", bcodegenp, true, "print AST before code generation" },
573	};
574	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
575
576	static void usage( char * argv[] ) {
577	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
578	int i = 0, j = 1; // j skips starting colon
579	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
580	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
581	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
582	cout << " -" << optstring[j] << ",";
583	} else { // no flag
584	j -= 1; // compensate
585	cout << " ";
586	} // if
587	cout << " --" << left << setw(12) << long_opts[i].name << " ";
588	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
589	cout << "one of: " << endl;
590	for ( int i = 0; i < printoptsSize; i += 1 ) {
591	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
592	} // for
593	} else {
594	cout << description[i] << endl;
595	} // if
596	} // if
597	if ( optstring[j + 1] == ':' ) j += 1;
598	} // for
599	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
600	exit( EXIT_FAILURE );
601	} // usage
602
603	static void parse_cmdline( int argc, char * argv[] ) {
604	opterr = 0; // (global) prevent getopt from printing error messages
605
606	bool Wsuppress = false, Werror = false;
607	int c;
608	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
609	switch ( c ) {
610	case 'c': // diagnostic colors
611	if ( strcmp( optarg, "always" ) == 0 ) {
612	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
613	} else if ( strcmp( optarg, "never" ) == 0 ) {
614	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
615	} else if ( strcmp( optarg, "auto" ) == 0 ) {
616	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
617	} // if
618	break;
619	case 'h': // help message
620	usage( argv ); // no return
621	break;
622	case 'i': // invariant checking
623	invariant = true;
624	break;
625	case 'l': // generate libcfa.c
626	libcfap = true;
627	break;
628	case 'L': // generate line marks
629	linemarks = true;
630	break;
631	case 'm': // do not replace main
632	nomainp = true;
633	break;
634	case 'N': // do not generate line marks
635	linemarks = false;
636	break;
637	case 'n': // do not read prelude
638	nopreludep = true;
639	break;
640	case 'p': // generate prototypes for prelude functions
641	genproto = true;
642	break;
643	case 'd': // don't print non-deterministic output
644	deterministic_output = true;
645	break;
646	case 'P': // print options
647	for ( int i = 0;; i += 1 ) {
648	if ( i == printoptsSize ) {
649	cout << "Unknown --print option " << optarg << endl;
650	goto Default;
651	} // if
652	if ( strcmp( optarg, printopts[i].name ) == 0 ) {
653	printopts[i].flag = printopts[i].val;
654	break;
655	} // if
656	} // for
657	break;
658	case PreludeDir: // prelude directory for debug/nodebug, hidden
659	PreludeDirector = optarg;
660	break;
661	case 'S': // enable profiling information, argument comma separated list of names
662	Stats::parse_params( optarg );
663	break;
664	case 't': // building cfa stdlib
665	treep = true;
666	break;
667	case 'g': // wait for gdb
668	waiting_for_gdb = true;
669	break;
670	case 'w': // suppress all warnings, hidden
671	Wsuppress = true;
672	break;
673	case 'W': // coordinate gcc -W with CFA, hidden
674	if ( strcmp( optarg, "all" ) == 0 ) {
675	SemanticWarning_EnableAll();
676	} else if ( strcmp( optarg, "error" ) == 0 ) {
677	Werror = true;
678	} else {
679	char * warning = optarg;
680	Severity s;
681	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
682	warning += 3;
683	s = Severity::Suppress;
684	} else {
685	s = Severity::Warn;
686	} // if
687	SemanticWarning_Set( warning, s );
688	} // if
689	break;
690	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
691	break;
692	case '?': // unknown option
693	if ( optopt ) { // short option ?
694	cout << "Unknown option -" << (char)optopt << endl;
695	} else {
696	cout << "Unknown option " << argv[optind - 1] << endl;
697	} // if
698	goto Default;
699	case ':': // missing option
700	if ( optopt ) { // short option ?
701	cout << "Missing option for -" << (char)optopt << endl;
702	} else {
703	cout << "Missing option for " << argv[optind - 1] << endl;
704	} // if
705	goto Default;
706	Default:
707	default:
708	usage( argv ); // no return
709	} // switch
710	} // while
711
712	if ( Werror ) {
713	SemanticWarning_WarningAsError();
714	} // if
715	if ( Wsuppress ) {
716	SemanticWarning_SuppressAll();
717	} // if
718	// for ( const auto w : WarningFormats ) {
719	// cout << w.name << ' ' << (int)w.severity << endl;
720	// } // for
721	} // parse_cmdline
722
723	static bool notPrelude( Declaration * decl ) {
724	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
725	} // notPrelude
726
727	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
728	list< Declaration * > decls;
729
730	if ( genproto ) {
731	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
732	} else {
733	decls = translationUnit;
734	} // if
735
736	// depending on commandline options, either generate code or dump the AST
737	if ( codegenp ) {
738	CodeGen::generate( decls, out, ! genproto, prettycodegenp );
739	} else {
740	printAll( decls, out );
741	} // if
742	deleteAll( translationUnit );
743	} // dump
744
745	static void dump( ast::TranslationUnit && transUnit, ostream & out ) {
746	std::list< Declaration * > translationUnit = convert( std::move( transUnit ) );
747	dump( translationUnit, out );
748	}
749
750	// Local Variables: //
751	// tab-width: 4 //
752	// mode: c++ //
753	// compile-command: "make install" //
754	// End: //

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