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source: src/main.cc @ db6cdc0

ADTast-experimental

Last change on this file since db6cdc0 was 7fffb1b, checked in by Andrew Beach <ajbeach@…>, 2 years ago
Translated the convertLvalue pass. It could possibly use some additional clean-up.
Property mode set to `100644`
File size: 29.7 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 Oct 5 12:06:00 2022
13	// Update Count : 679
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/CompilerError.h" // for CompilerError
43	#include "Common/DeclStats.hpp" // for printDeclStats
44	#include "Common/ResolvProtoDump.hpp" // for dumpAsResolverProto
45	#include "Common/Stats.h" // for Stats
46	#include "Common/UnimplementedError.h" // for UnimplementedError
47	#include "Common/utility.h" // for deleteAll, filter, printAll
48	#include "Concurrency/Keywords.h" // for implementMutex, implement...
49	#include "Concurrency/Waitfor.h" // for generateWaitfor
50	#include "ControlStruct/ExceptDecl.h" // for translateExcept
51	#include "ControlStruct/ExceptTranslate.h" // for translateThrows, translat...
52	#include "ControlStruct/FixLabels.hpp" // for fixLabels
53	#include "ControlStruct/HoistControlDecls.hpp" // hoistControlDecls
54	#include "GenPoly/Box.h" // for box
55	#include "GenPoly/InstantiateGeneric.h" // for instantiateGeneric
56	#include "GenPoly/Lvalue.h" // for convertLvalue
57	#include "GenPoly/Specialize.h" // for convertSpecializations
58	#include "InitTweak/FixInit.h" // for fix
59	#include "InitTweak/GenInit.h" // for genInit
60	#include "MakeLibCfa.h" // for makeLibCfa
61	#include "Parser/ParseNode.h" // for DeclarationNode, buildList
62	#include "Parser/TypedefTable.h" // for TypedefTable
63	#include "ResolvExpr/CandidatePrinter.hpp" // for printCandidates
64	#include "ResolvExpr/Resolver.h" // for resolve
65	#include "SynTree/LinkageSpec.h" // for Spec, Cforall, Intrinsic
66	#include "SynTree/Declaration.h" // for Declaration
67	#include "Tuples/Tuples.h" // for expandMemberTuples, expan...
68	#include "Validate/Autogen.hpp" // for autogenerateRoutines
69	#include "Validate/CompoundLiteral.hpp" // for handleCompoundLiterals
70	#include "Validate/EliminateTypedef.hpp" // for eliminateTypedef
71	#include "Validate/EnumAndPointerDecay.hpp" // for decayEnumsAndPointers
72	#include "Validate/FindSpecialDecls.h" // for findGlobalDecls
73	#include "Validate/FixQualifiedTypes.hpp" // for fixQualifiedTypes
74	#include "Validate/FixReturnTypes.hpp" // for fixReturnTypes
75	#include "Validate/ForallPointerDecay.hpp" // for decayForallPointers
76	#include "Validate/GenericParameter.hpp" // for fillGenericParameters, tr...
77	#include "Validate/HoistStruct.hpp" // for hoistStruct
78	#include "Validate/HoistTypeDecls.hpp" // for hoistTypeDecls
79	#include "Validate/InitializerLength.hpp" // for setLengthFromInitializer
80	#include "Validate/LabelAddressFixer.hpp" // for fixLabelAddresses
81	#include "Validate/LinkReferenceToTypes.hpp" // for linkReferenceToTypes
82	#include "Validate/ReplaceTypedef.hpp" // for replaceTypedef
83	#include "Validate/ReturnCheck.hpp" // for checkReturnStatements
84	#include "Validate/VerifyCtorDtorAssign.hpp" // for verifyCtorDtorAssign
85	#include "Virtual/ExpandCasts.h" // for expandCasts
86
87	static void NewPass( const char * const name ) {
88	Stats::Heap::newPass( name );
89	using namespace Stats::Counters;
90	{
91	static auto group = build<CounterGroup>( "Pass Visitor" );
92	auto pass = build<CounterGroup>( name, group );
93	pass_visitor_stats.depth = 0;
94	pass_visitor_stats.avg = build<AverageCounter<double>>( "Average Depth", pass );
95	pass_visitor_stats.max = build<MaxCounter<double>>( "Max Depth", pass );
96	}
97	{
98	static auto group = build<CounterGroup>( "Syntax Node" );
99	auto pass = build<CounterGroup>( name, group );
100	BaseSyntaxNode::new_nodes = build<SimpleCounter>( "Allocs", pass );
101	}
102	}
103
104	#define PASS( name, pass ) \
105	if ( errorp ) { cerr << name << endl; } \
106	NewPass(name); \
107	Stats::Time::StartBlock(name); \
108	pass; \
109	Stats::Time::StopBlock();
110
111	LinkageSpec::Spec linkage = LinkageSpec::Cforall;
112	TypedefTable typedefTable;
113	DeclarationNode * parseTree = nullptr; // program parse tree
114
115	static bool waiting_for_gdb = false; // flag to set cfa-cpp to wait for gdb on start
116
117	static string PreludeDirector = "";
118
119	static void parse_cmdline( int argc, char * argv[] );
120	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit = false );
121	static void dump( list< Declaration * > & translationUnit, ostream & out = cout );
122	static void dump( ast::TranslationUnit && transUnit, ostream & out = cout );
123
124	static void backtrace( int start ) { // skip first N stack frames
125	enum { Frames = 50, }; // maximum number of stack frames
126	void * array[Frames];
127	size_t size = ::backtrace( array, Frames );
128	char ** messages = ::backtrace_symbols( array, size ); // does not demangle names
129
130	*index( messages[0], '(' ) = '\0'; // find executable name
131	cerr << "Stack back trace for: " << messages[0] << endl;
132
133	// skip last 2 stack frames after main
134	for ( unsigned int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
135	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
136
137	for ( char * p = messages[i]; *p; p += 1 ) { // find parantheses and +offset
138	if ( *p == '(' ) {
139	mangled_name = p;
140	} else if ( *p == '+' ) {
141	offset_begin = p;
142	} else if ( *p == ')' ) {
143	offset_end = p;
144	break;
145	} // if
146	} // for
147
148	// if line contains symbol, attempt to demangle
149	int frameNo = i - start;
150	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
151	*mangled_name++ = '\0'; // delimit strings
152	*offset_begin++ = '\0';
153	*offset_end++ = '\0';
154
155	int status;
156	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
157	// bug in __cxa_demangle for single-character lower-case non-mangled names
158	if ( status == 0 ) { // demangling successful ?
159	cerr << "(" << frameNo << ") " << messages[i] << " : "
160	<< real_name << "+" << offset_begin << offset_end << endl;
161	} else { // otherwise, output mangled name
162	cerr << "(" << frameNo << ") " << messages[i] << " : "
163	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
164	} // if
165
166	free( real_name );
167	} else { // otherwise, print the whole line
168	cerr << "(" << frameNo << ") " << messages[i] << endl;
169	} // if
170	} // for
171
172	free( messages );
173	} // backtrace
174
175	#define SIGPARMS int sig __attribute__(( unused )), siginfo_t * sfp __attribute__(( unused )), ucontext_t * cxt __attribute__(( unused ))
176
177	static void _Signal(struct sigaction & act, int sig, int flags ) {
178	act.sa_flags = flags;
179
180	if ( sigaction( sig, &act, nullptr ) == -1 ) {
181	cerr << "cfa-cpp compilation error problem installing signal handler, error(" << errno << ") " << strerror( errno ) << endl;
182	_exit( EXIT_FAILURE );
183	} // if
184	}
185
186	static void Signal( int sig, void (* handler)(SIGPARMS), int flags ) {
187	struct sigaction act;
188	act.sa_sigaction = (void ()(int, siginfo_t , void *))handler;
189	_Signal(act, sig, flags);
190	} // Signal
191
192	static void Signal( int sig, void (* handler)(int), int flags ) {
193	struct sigaction act;
194	act.sa_handler = handler;
195	_Signal(act, sig, flags);
196	} // Signal
197
198	static void sigSegvBusHandler( SIGPARMS ) {
199	if ( sfp->si_addr == nullptr ) {
200	cerr << "Null pointer (nullptr) dereference." << endl;
201	} else {
202	cerr << (sig == SIGSEGV ? "Segment fault" : "Bus error") << " at memory location " << sfp->si_addr << "." << endl
203	<< "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;
204	} // if
205	backtrace( 2 ); // skip first 2 stack frames
206	abort(); // cause core dump for debugging
207	} // sigSegvBusHandler
208
209	static void sigFpeHandler( SIGPARMS ) {
210	const char * msg;
211
212	switch ( sfp->si_code ) {
213	case FPE_INTDIV: case FPE_FLTDIV: msg = "divide by zero"; break;
214	case FPE_FLTOVF: msg = "overflow"; break;
215	case FPE_FLTUND: msg = "underflow"; break;
216	case FPE_FLTRES: msg = "inexact result"; break;
217	case FPE_FLTINV: msg = "invalid operation"; break;
218	default: msg = "unknown";
219	} // choose
220	cerr << "Computation error " << msg << " at location " << sfp->si_addr << endl
221	<< "Possible cause is constant-expression evaluation invalid." << endl;
222	backtrace( 2 ); // skip first 2 stack frames
223	abort(); // cause core dump for debugging
224	} // sigFpeHandler
225
226	static void sigAbortHandler( SIGPARMS ) {
227	backtrace( 6 ); // skip first 6 stack frames
228	Signal( SIGABRT, SIG_DFL, SA_SIGINFO ); // reset default signal handler
229	raise( SIGABRT ); // reraise SIGABRT
230	} // sigAbortHandler
231
232	int main( int argc, char * argv[] ) {
233	FILE * input; // use FILE rather than istream because yyin is FILE
234	ostream * output = & cout;
235	list< Declaration * > translationUnit;
236
237	Signal( SIGSEGV, sigSegvBusHandler, SA_SIGINFO );
238	Signal( SIGBUS, sigSegvBusHandler, SA_SIGINFO );
239	Signal( SIGFPE, sigFpeHandler, SA_SIGINFO );
240	Signal( SIGABRT, sigAbortHandler, SA_SIGINFO );
241
242	// cout << "main" << endl;
243	// for ( int i = 0; i < argc; i += 1 ) {
244	// cout << '\t' << argv[i] << endl;
245	// } // for
246
247	parse_cmdline( argc, argv ); // process command-line arguments
248	CodeGen::FixMain::setReplaceMain( !nomainp );
249
250	if ( waiting_for_gdb ) {
251	cerr << "Waiting for gdb" << endl;
252	cerr << "run :" << endl;
253	cerr << " gdb attach " << getpid() << endl;
254	raise(SIGSTOP);
255	} // if
256
257	try {
258	// choose to read the program from a file or stdin
259	if ( optind < argc ) { // any commands after the flags ? => input file name
260	input = fopen( argv[ optind ], "r" );
261	assertf( input, "cannot open %s because %s\n", argv[ optind ], strerror( errno ) );
262	optind += 1;
263	} else { // no input file name
264	input = stdin;
265	} // if
266
267	Stats::Time::StartGlobal();
268	NewPass("Parse");
269	Stats::Time::StartBlock("Parse");
270
271	// read in the builtins, extras, and the prelude
272	if ( ! nopreludep ) { // include gcc builtins
273	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
274
275	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
276
277	// Read to gcc builtins, if not generating the cfa library
278	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cf").c_str(), "r" );
279	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
280	parse( gcc_builtins, LinkageSpec::Compiler );
281
282	// read the extra prelude in, if not generating the cfa library
283	FILE * extras = fopen( (PreludeDirector + "/extras.cf").c_str(), "r" );
284	assertf( extras, "cannot open extras.cf\n" );
285	parse( extras, LinkageSpec::BuiltinC );
286
287	if ( ! libcfap ) {
288	// read the prelude in, if not generating the cfa library
289	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
290	assertf( prelude, "cannot open prelude.cfa\n" );
291	parse( prelude, LinkageSpec::Intrinsic );
292
293	// Read to cfa builtins, if not generating the cfa library
294	FILE * builtins = fopen( (PreludeDirector + "/builtins.cf").c_str(), "r" );
295	assertf( builtins, "cannot open builtins.cf\n" );
296	parse( builtins, LinkageSpec::BuiltinCFA );
297	} // if
298	} // if
299
300	parse( input, libcfap ? LinkageSpec::Intrinsic : LinkageSpec::Cforall, yydebug );
301
302	if ( parsep ) {
303	parseTree->printList( cout );
304	delete parseTree;
305	return EXIT_SUCCESS;
306	} // if
307
308	buildList( parseTree, translationUnit );
309	delete parseTree;
310	parseTree = nullptr;
311
312	if ( astp ) {
313	dump( translationUnit );
314	return EXIT_SUCCESS;
315	} // if
316
317	// Temporary: fill locations after parsing so that every node has a location, for early error messages.
318	// Eventually we should pass the locations from the parser to every node, but this quick and dirty solution
319	// works okay for now.
320	CodeTools::fillLocations( translationUnit );
321	Stats::Time::StopBlock();
322
323	if (Stats::Counters::enabled) {
324	ast::pass_visitor_stats.avg = Stats::Counters::build<Stats::Counters::AverageCounter<double>>("Average Depth - New");
325	ast::pass_visitor_stats.max = Stats::Counters::build<Stats::Counters::MaxCounter<double>>("Max depth - New");
326	}
327	auto transUnit = convert( std::move( translationUnit ) );
328
329	forceFillCodeLocations( transUnit );
330
331	PASS( "Translate Exception Declarations", ControlStruct::translateExcept( transUnit ) );
332	if ( exdeclp ) {
333	dump( std::move( transUnit ) );
334	return EXIT_SUCCESS;
335	}
336
337	PASS( "Verify Ctor, Dtor & Assign", Validate::verifyCtorDtorAssign( transUnit ) );
338	PASS( "Hoist Type Decls", Validate::hoistTypeDecls( transUnit ) );
339	// Hoist Type Decls pulls some declarations out of contexts where
340	// locations are not tracked. Perhaps they should be, but for now
341	// the full fill solves it.
342	forceFillCodeLocations( transUnit );
343
344	PASS( "Replace Typedefs", Validate::replaceTypedef( transUnit ) );
345	PASS( "Fix Return Types", Validate::fixReturnTypes( transUnit ) );
346	PASS( "Enum and Pointer Decay", Validate::decayEnumsAndPointers( transUnit ) );
347
348	PASS( "Link Reference To Types", Validate::linkReferenceToTypes( transUnit ) );
349
350	PASS( "Fix Qualified Types", Validate::fixQualifiedTypes( transUnit ) );
351	PASS( "Hoist Struct", Validate::hoistStruct( transUnit ) );
352	PASS( "Eliminate Typedef", Validate::eliminateTypedef( transUnit ) );
353	PASS( "Validate Generic Parameters", Validate::fillGenericParameters( transUnit ) );
354	PASS( "Translate Dimensions", Validate::translateDimensionParameters( transUnit ) );
355	PASS( "Check Function Returns", Validate::checkReturnStatements( transUnit ) );
356	PASS( "Fix Return Statements", InitTweak::fixReturnStatements( transUnit ) );
357	PASS( "Implement Concurrent Keywords", Concurrency::implementKeywords( transUnit ) );
358	PASS( "Forall Pointer Decay", Validate::decayForallPointers( transUnit ) );
359	PASS( "Hoist Control Declarations", ControlStruct::hoistControlDecls( transUnit ) );
360
361	PASS( "Generate Autogen Routines", Validate::autogenerateRoutines( transUnit ) );
362
363	PASS( "Implement Mutex", Concurrency::implementMutex( transUnit ) );
364	PASS( "Implement Thread Start", Concurrency::implementThreadStarter( transUnit ) );
365	PASS( "Compound Literal", Validate::handleCompoundLiterals( transUnit ) );
366	PASS( "Set Length From Initializer", Validate::setLengthFromInitializer( transUnit ) );
367	PASS( "Find Global Decls", Validate::findGlobalDecls( transUnit ) );
368	PASS( "Fix Label Address", Validate::fixLabelAddresses( transUnit ) );
369
370	if ( symtabp ) {
371	return EXIT_SUCCESS;
372	} // if
373
374	if ( expraltp ) {
375	ResolvExpr::printCandidates( transUnit );
376	return EXIT_SUCCESS;
377	} // if
378
379	if ( validp ) {
380	dump( std::move( transUnit ) );
381	return EXIT_SUCCESS;
382	} // if
383
384	PASS( "Translate Throws", ControlStruct::translateThrows( transUnit ) );
385	PASS( "Fix Labels", ControlStruct::fixLabels( transUnit ) );
386	PASS( "Fix Names", CodeGen::fixNames( transUnit ) );
387	PASS( "Gen Init", InitTweak::genInit( transUnit ) );
388	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( transUnit ) );
389
390	if ( libcfap ) {
391	// Generate the bodies of cfa library functions.
392	LibCfa::makeLibCfa( transUnit );
393	} // if
394
395	if ( declstatsp ) {
396	printDeclStats( transUnit );
397	return EXIT_SUCCESS;
398	} // if
399
400	if ( bresolvep ) {
401	dump( std::move( transUnit ) );
402	return EXIT_SUCCESS;
403	} // if
404
405	if ( resolvprotop ) {
406	dumpAsResolverProto( transUnit );
407	return EXIT_SUCCESS;
408	} // if
409
410	PASS( "Resolve", ResolvExpr::resolve( transUnit ) );
411	if ( exprp ) {
412	dump( std::move( transUnit ) );
413	return EXIT_SUCCESS;
414	} // if
415
416	forceFillCodeLocations( transUnit );
417
418	PASS( "Fix Init", InitTweak::fix(transUnit, buildingLibrary()));
419
420	// fix ObjectDecl - replaces ConstructorInit nodes
421	if ( ctorinitp ) {
422	dump( std::move( transUnit ) );
423	return EXIT_SUCCESS;
424	} // if
425
426	// Currently not working due to unresolved issues with UniqueExpr
427	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
428
429	PASS( "Translate Tries", ControlStruct::translateTries( transUnit ) );
430	PASS( "Gen Waitfor", Concurrency::generateWaitFor( transUnit ) );
431
432	// Needs to happen before tuple types are expanded.
433	PASS( "Convert Specializations", GenPoly::convertSpecializations( transUnit ) );
434
435	PASS( "Expand Tuples", Tuples::expandTuples( transUnit ) );
436
437	if ( tuplep ) {
438	dump( std::move( transUnit ) );
439	return EXIT_SUCCESS;
440	} // if
441
442	// Must come after Translate Tries.
443	PASS( "Virtual Expand Casts", Virtual::expandCasts( transUnit ) );
444
445	PASS( "Instantiate Generics", GenPoly::instantiateGeneric( transUnit ) );
446	if ( genericsp ) {
447	dump( std::move( transUnit ) );
448	return EXIT_SUCCESS;
449	} // if
450
451	PASS( "Convert L-Value", GenPoly::convertLvalue( transUnit ) );
452
453	translationUnit = convert( std::move( transUnit ) );
454
455	if ( bboxp ) {
456	dump( translationUnit );
457	return EXIT_SUCCESS;
458	} // if
459	PASS( "Box", GenPoly::box( translationUnit ) );
460
461	PASS( "Link-Once", CodeGen::translateLinkOnce( translationUnit ) );
462
463	// Code has been lowered to C, now we can start generation.
464
465	if ( bcodegenp ) {
466	dump( translationUnit );
467	return EXIT_SUCCESS;
468	} // if
469
470	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
471	output = new ofstream( argv[ optind ] );
472	} // if
473
474	CodeTools::fillLocations( translationUnit );
475	PASS( "Code Gen", CodeGen::generate( translationUnit, *output, ! genproto, prettycodegenp, true, linemarks ) );
476
477	CodeGen::FixMain::fix( translationUnit, *output,
478	(PreludeDirector + "/bootloader.c").c_str() );
479	if ( output != &cout ) {
480	delete output;
481	} // if
482	} catch ( SemanticErrorException & e ) {
483	if ( errorp ) {
484	cerr << "---AST at error:---" << endl;
485	dump( translationUnit, cerr );
486	cerr << endl << "---End of AST, begin error message:---\n" << endl;
487	} // if
488	e.print();
489	if ( output != &cout ) {
490	delete output;
491	} // if
492	return EXIT_FAILURE;
493	} catch ( UnimplementedError & e ) {
494	cout << "Sorry, " << e.get_what() << " is not currently implemented" << endl;
495	if ( output != &cout ) {
496	delete output;
497	} // if
498	return EXIT_FAILURE;
499	} catch ( CompilerError & e ) {
500	cerr << "Compiler Error: " << e.get_what() << endl;
501	cerr << "(please report bugs to [REDACTED])" << endl;
502	if ( output != &cout ) {
503	delete output;
504	} // if
505	return EXIT_FAILURE;
506	} catch ( std::bad_alloc & ) {
507	cerr << "cfa-cpp compilation error std::bad_alloc" << endl;
508	backtrace( 1 );
509	abort();
510	} catch ( ... ) {
511	exception_ptr eptr = current_exception();
512	try {
513	if (eptr) {
514	rethrow_exception(eptr);
515	} else {
516	cerr << "cfa-cpp compilation error exception uncaught and unknown" << endl;
517	} // if
518	} catch( const exception & e ) {
519	cerr << "cfa-cpp compilation error uncaught exception \"" << e.what() << "\"\n";
520	} // try
521	return EXIT_FAILURE;
522	} // try
523
524	deleteAll( translationUnit );
525	Stats::print();
526	return EXIT_SUCCESS;
527	} // main
528
529
530	static const char optstring[] = ":c:ghlLmNnpdP:S:twW:D:";
531
532	enum { PreludeDir = 128 };
533	static struct option long_opts[] = {
534	{ "colors", required_argument, nullptr, 'c' },
535	{ "gdb", no_argument, nullptr, 'g' },
536	{ "help", no_argument, nullptr, 'h' },
537	{ "libcfa", no_argument, nullptr, 'l' },
538	{ "linemarks", no_argument, nullptr, 'L' },
539	{ "no-main", no_argument, 0, 'm' },
540	{ "no-linemarks", no_argument, nullptr, 'N' },
541	{ "no-prelude", no_argument, nullptr, 'n' },
542	{ "prototypes", no_argument, nullptr, 'p' },
543	{ "deterministic-out", no_argument, nullptr, 'd' },
544	{ "print", required_argument, nullptr, 'P' },
545	{ "prelude-dir", required_argument, nullptr, PreludeDir },
546	{ "statistics", required_argument, nullptr, 'S' },
547	{ "tree", no_argument, nullptr, 't' },
548	{ "", no_argument, nullptr, 0 }, // -w
549	{ "", no_argument, nullptr, 0 }, // -W
550	{ "", no_argument, nullptr, 0 }, // -D
551	{ nullptr, 0, nullptr, 0 }
552	}; // long_opts
553
554	static const char * description[] = {
555	"diagnostic color: never, always, auto", // -c
556	"wait for gdb to attach", // -g
557	"print translator help message", // -h
558	"generate libcfa.c", // -l
559	"generate line marks", // -L
560	"do not replace main", // -m
561	"do not generate line marks", // -N
562	"do not read prelude", // -n
563	"do not generate prelude prototypes => prelude not printed", // -p
564	"only print deterministic output", // -d
565	"print", // -P
566	"<directory> prelude directory for debug/nodebug", // no flag
567	"<option-list> enable profiling information: counters, heap, time, all, none", // -S
568	"building cfa standard lib", // -t
569	"", // -w
570	"", // -W
571	"", // -D
572	}; // description
573
574	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
575
576	static struct Printopts {
577	const char * name;
578	int & flag;
579	int val;
580	const char * descript;
581	} printopts[] = {
582	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
583	{ "asterr", errorp, true, "print AST on error" },
584	{ "declstats", declstatsp, true, "code property statistics" },
585	{ "parse", yydebug, true, "yacc (parsing) debug information" },
586	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
587	{ "rproto", resolvprotop, true, "resolver-proto instance" },
588	{ "rsteps", resolvep, true, "print resolver steps" },
589	{ "tree", parsep, true, "print parse tree" },
590	// code dumps
591	{ "ast", astp, true, "print AST after parsing" },
592	{ "exdecl", exdeclp, true, "print AST after translating exception decls" },
593	{ "symevt", symtabp, true, "print AST after symbol table events" },
594	{ "altexpr", expraltp, true, "print alternatives for expressions" },
595	{ "astdecl", validp, true, "print AST after declaration validation pass" },
596	{ "resolver", bresolvep, true, "print AST before resolver step" },
597	{ "astexpr", exprp, true, "print AST after expression analysis" },
598	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
599	{ "tuple", tuplep, true, "print AST after tuple expansion" },
600	{ "astgen", genericsp, true, "print AST after instantiate generics" },
601	{ "box", bboxp, true, "print AST before box step" },
602	{ "codegen", bcodegenp, true, "print AST before code generation" },
603	};
604	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
605
606	static void usage( char * argv[] ) {
607	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
608	int i = 0, j = 1; // j skips starting colon
609	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
610	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
611	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
612	cout << " -" << optstring[j] << ",";
613	} else { // no flag
614	j -= 1; // compensate
615	cout << " ";
616	} // if
617	cout << " --" << left << setw(12) << long_opts[i].name << " ";
618	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
619	cout << "one of: " << endl;
620	for ( int i = 0; i < printoptsSize; i += 1 ) {
621	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
622	} // for
623	} else {
624	cout << description[i] << endl;
625	} // if
626	} // if
627	if ( optstring[j + 1] == ':' ) j += 1;
628	} // for
629	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
630	exit( EXIT_FAILURE );
631	} // usage
632
633	static void parse_cmdline( int argc, char * argv[] ) {
634	opterr = 0; // (global) prevent getopt from printing error messages
635
636	bool Wsuppress = false, Werror = false;
637	int c;
638	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
639	switch ( c ) {
640	case 'c': // diagnostic colors
641	if ( strcmp( optarg, "always" ) == 0 ) {
642	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
643	} else if ( strcmp( optarg, "never" ) == 0 ) {
644	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
645	} else if ( strcmp( optarg, "auto" ) == 0 ) {
646	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
647	} // if
648	break;
649	case 'h': // help message
650	usage( argv ); // no return
651	break;
652	case 'l': // generate libcfa.c
653	libcfap = true;
654	break;
655	case 'L': // generate line marks
656	linemarks = true;
657	break;
658	case 'm': // do not replace main
659	nomainp = true;
660	break;
661	case 'N': // do not generate line marks
662	linemarks = false;
663	break;
664	case 'n': // do not read prelude
665	nopreludep = true;
666	break;
667	case 'p': // generate prototypes for prelude functions
668	genproto = true;
669	break;
670	case 'd': // don't print non-deterministic output
671	deterministic_output = true;
672	break;
673	case 'P': // print options
674	for ( int i = 0;; i += 1 ) {
675	if ( i == printoptsSize ) {
676	cout << "Unknown --print option " << optarg << endl;
677	goto Default;
678	} // if
679	if ( strcmp( optarg, printopts[i].name ) == 0 ) {
680	printopts[i].flag = printopts[i].val;
681	break;
682	} // if
683	} // for
684	break;
685	case PreludeDir: // prelude directory for debug/nodebug, hidden
686	PreludeDirector = optarg;
687	break;
688	case 'S': // enable profiling information, argument comma separated list of names
689	Stats::parse_params( optarg );
690	break;
691	case 't': // building cfa stdlib
692	treep = true;
693	break;
694	case 'g': // wait for gdb
695	waiting_for_gdb = true;
696	break;
697	case 'w': // suppress all warnings, hidden
698	Wsuppress = true;
699	break;
700	case 'W': // coordinate gcc -W with CFA, hidden
701	if ( strcmp( optarg, "all" ) == 0 ) {
702	SemanticWarning_EnableAll();
703	} else if ( strcmp( optarg, "error" ) == 0 ) {
704	Werror = true;
705	} else {
706	char * warning = optarg;
707	Severity s;
708	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
709	warning += 3;
710	s = Severity::Suppress;
711	} else {
712	s = Severity::Warn;
713	} // if
714	SemanticWarning_Set( warning, s );
715	} // if
716	break;
717	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
718	break;
719	case '?': // unknown option
720	if ( optopt ) { // short option ?
721	cout << "Unknown option -" << (char)optopt << endl;
722	} else {
723	cout << "Unknown option " << argv[optind - 1] << endl;
724	} // if
725	goto Default;
726	case ':': // missing option
727	if ( optopt ) { // short option ?
728	cout << "Missing option for -" << (char)optopt << endl;
729	} else {
730	cout << "Missing option for " << argv[optind - 1] << endl;
731	} // if
732	goto Default;
733	Default:
734	default:
735	usage( argv ); // no return
736	} // switch
737	} // while
738
739	if ( Werror ) {
740	SemanticWarning_WarningAsError();
741	} // if
742	if ( Wsuppress ) {
743	SemanticWarning_SuppressAll();
744	} // if
745	// for ( const auto w : WarningFormats ) {
746	// cout << w.name << ' ' << (int)w.severity << endl;
747	// } // for
748	} // parse_cmdline
749
750	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit ) {
751	extern int yyparse( void );
752	extern FILE * yyin;
753	extern int yylineno;
754
755	::linkage = linkage; // set globals
756	yyin = input;
757	yylineno = 1;
758	int parseStatus = yyparse();
759
760	fclose( input );
761	if ( shouldExit \|\| parseStatus != 0 ) {
762	exit( parseStatus );
763	} // if
764	} // parse
765
766	static bool notPrelude( Declaration * decl ) {
767	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
768	} // notPrelude
769
770	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
771	list< Declaration * > decls;
772
773	if ( genproto ) {
774	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
775	} else {
776	decls = translationUnit;
777	} // if
778
779	// depending on commandline options, either generate code or dump the AST
780	if ( codegenp ) {
781	CodeGen::generate( decls, out, ! genproto, prettycodegenp );
782	} else {
783	printAll( decls, out );
784	} // if
785	deleteAll( translationUnit );
786	} // dump
787
788	static void dump( ast::TranslationUnit && transUnit, ostream & out ) {
789	std::list< Declaration * > translationUnit = convert( std::move( transUnit ) );
790	dump( translationUnit, out );
791	}
792
793	// Local Variables: //
794	// tab-width: 4 //
795	// mode: c++ //
796	// compile-command: "make install" //
797	// End: //

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