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source: src/main.cc @ 1b7b604

ADTast-experimental

Last change on this file since 1b7b604 was f26421f, checked in by Mugilan Ganesan <mganesan@…>, 15 months ago
Removed CompilerError? and UnimplementedError?
Property mode set to `100644`
File size: 28.4 KB

Line
1	//
2	// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3	//
4	// The contents of this file are covered under the licence agreement in the
5	// file "LICENCE" distributed with Cforall.
6	//
7	// main.cc --
8	//
9	// Author : Peter Buhr and Rob Schluntz
10	// Created On : Fri May 15 23:12:02 2015
11	// Last Modified By : Andrew Beach
12	// Last Modified On : 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/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
85	static void NewPass( const char * const name ) {
86	Stats::Heap::newPass( name );
87	using namespace Stats::Counters;
88	{
89	static auto group = build<CounterGroup>( "Pass Visitor" );
90	auto pass = build<CounterGroup>( name, group );
91	pass_visitor_stats.depth = 0;
92	pass_visitor_stats.avg = build<AverageCounter<double>>( "Average Depth", pass );
93	pass_visitor_stats.max = build<MaxCounter<double>>( "Max Depth", pass );
94	}
95	{
96	static auto group = build<CounterGroup>( "Syntax Node" );
97	auto pass = build<CounterGroup>( name, group );
98	BaseSyntaxNode::new_nodes = build<SimpleCounter>( "Allocs", pass );
99	}
100	}
101
102	#define PASS( name, pass ) \
103	if ( errorp ) { cerr << name << endl; } \
104	NewPass(name); \
105	Stats::Time::StartBlock(name); \
106	pass; \
107	Stats::Time::StopBlock();
108
109	static bool waiting_for_gdb = false; // flag to set cfa-cpp to wait for gdb on start
110
111	static string PreludeDirector = "";
112
113	static void parse_cmdline( int argc, char * argv[] );
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	ast::TranslationUnit transUnit;
230
231	Signal( SIGSEGV, sigSegvBusHandler, SA_SIGINFO );
232	Signal( SIGBUS, sigSegvBusHandler, SA_SIGINFO );
233	Signal( SIGFPE, sigFpeHandler, SA_SIGINFO );
234	Signal( SIGABRT, sigAbortHandler, SA_SIGINFO );
235
236	// cout << "main" << endl;
237	// for ( int i = 0; i < argc; i += 1 ) {
238	// cout << '\t' << argv[i] << endl;
239	// } // for
240
241	parse_cmdline( argc, argv ); // process command-line arguments
242	CodeGen::FixMain::setReplaceMain( !nomainp );
243
244	if ( waiting_for_gdb ) {
245	cerr << "Waiting for gdb" << endl;
246	cerr << "run :" << endl;
247	cerr << " gdb attach " << getpid() << endl;
248	raise(SIGSTOP);
249	} // if
250
251	try {
252	// choose to read the program from a file or stdin
253	if ( optind < argc ) { // any commands after the flags ? => input file name
254	input = fopen( argv[ optind ], "r" );
255	assertf( input, "cannot open %s because %s\n", argv[ optind ], strerror( errno ) );
256	optind += 1;
257	} else { // no input file name
258	input = stdin;
259	} // if
260
261	Stats::Time::StartGlobal();
262	NewPass("Parse");
263	Stats::Time::StartBlock("Parse");
264
265	// read in the builtins, extras, and the prelude
266	if ( ! nopreludep ) { // include gcc builtins
267	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
268
269	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
270
271	// Read to gcc builtins, if not generating the cfa library
272	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cf").c_str(), "r" );
273	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
274	parse( gcc_builtins, LinkageSpec::Compiler );
275
276	// read the extra prelude in, if not generating the cfa library
277	FILE * extras = fopen( (PreludeDirector + "/extras.cf").c_str(), "r" );
278	assertf( extras, "cannot open extras.cf\n" );
279	parse( extras, LinkageSpec::BuiltinC );
280
281	if ( ! libcfap ) {
282	// read the prelude in, if not generating the cfa library
283	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
284	assertf( prelude, "cannot open prelude.cfa\n" );
285	parse( prelude, LinkageSpec::Intrinsic );
286
287	// Read to cfa builtins, if not generating the cfa library
288	FILE * builtins = fopen( (PreludeDirector + "/builtins.cf").c_str(), "r" );
289	assertf( builtins, "cannot open builtins.cf\n" );
290	parse( builtins, LinkageSpec::BuiltinCFA );
291	} // if
292	} // if
293
294	parse( input, libcfap ? LinkageSpec::Intrinsic : LinkageSpec::Cforall, yydebug );
295
296	transUnit = buildUnit();
297
298	if ( astp ) {
299	dump( std::move( transUnit ) );
300	return EXIT_SUCCESS;
301	} // if
302
303	Stats::Time::StopBlock();
304
305	if (Stats::Counters::enabled) {
306	ast::pass_visitor_stats.avg = Stats::Counters::build<Stats::Counters::AverageCounter<double>>("Average Depth - New");
307	ast::pass_visitor_stats.max = Stats::Counters::build<Stats::Counters::MaxCounter<double>>("Max depth - New");
308	}
309
310	PASS( "Hoist Type Decls", Validate::hoistTypeDecls( transUnit ) );
311	// Hoist Type Decls pulls some declarations out of contexts where
312	// locations are not tracked. Perhaps they should be, but for now
313	// the full fill solves it.
314	forceFillCodeLocations( transUnit );
315
316	PASS( "Translate Exception Declarations", ControlStruct::translateExcept( transUnit ) );
317	if ( exdeclp ) {
318	dump( std::move( transUnit ) );
319	return EXIT_SUCCESS;
320	}
321
322	PASS( "Verify Ctor, Dtor & Assign", Validate::verifyCtorDtorAssign( transUnit ) );
323	PASS( "Replace Typedefs", Validate::replaceTypedef( transUnit ) );
324	PASS( "Fix Return Types", Validate::fixReturnTypes( transUnit ) );
325	PASS( "Enum and Pointer Decay", Validate::decayEnumsAndPointers( transUnit ) );
326
327	PASS( "Link Reference To Types", Validate::linkReferenceToTypes( transUnit ) );
328
329	PASS( "Fix Qualified Types", Validate::fixQualifiedTypes( transUnit ) );
330	PASS( "Hoist Struct", Validate::hoistStruct( transUnit ) );
331	PASS( "Eliminate Typedef", Validate::eliminateTypedef( transUnit ) );
332	PASS( "Validate Generic Parameters", Validate::fillGenericParameters( transUnit ) );
333	PASS( "Translate Dimensions", Validate::translateDimensionParameters( transUnit ) );
334	PASS( "Check Function Returns", Validate::checkReturnStatements( transUnit ) );
335	PASS( "Fix Return Statements", InitTweak::fixReturnStatements( transUnit ) );
336	PASS( "Implement Concurrent Keywords", Concurrency::implementKeywords( transUnit ) );
337	PASS( "Forall Pointer Decay", Validate::decayForallPointers( transUnit ) );
338	PASS( "Hoist Control Declarations", ControlStruct::hoistControlDecls( transUnit ) );
339
340	PASS( "Generate Autogen Routines", Validate::autogenerateRoutines( transUnit ) );
341
342	PASS( "Implement Actors", Concurrency::implementActors( transUnit ) );
343
344	PASS( "Implement Mutex", Concurrency::implementMutex( transUnit ) );
345	PASS( "Implement Thread Start", Concurrency::implementThreadStarter( transUnit ) );
346	PASS( "Compound Literal", Validate::handleCompoundLiterals( transUnit ) );
347	PASS( "Set Length From Initializer", Validate::setLengthFromInitializer( transUnit ) );
348	PASS( "Find Global Decls", Validate::findGlobalDecls( transUnit ) );
349	PASS( "Fix Label Address", Validate::fixLabelAddresses( transUnit ) );
350
351	if ( symtabp ) {
352	return EXIT_SUCCESS;
353	} // if
354
355	if ( expraltp ) {
356	ResolvExpr::printCandidates( transUnit );
357	return EXIT_SUCCESS;
358	} // if
359
360	if ( validp ) {
361	dump( std::move( transUnit ) );
362	return EXIT_SUCCESS;
363	} // if
364
365	PASS( "Translate Throws", ControlStruct::translateThrows( transUnit ) );
366	PASS( "Fix Labels", ControlStruct::fixLabels( transUnit ) );
367	PASS( "Fix Names", CodeGen::fixNames( transUnit ) );
368	PASS( "Gen Init", InitTweak::genInit( transUnit ) );
369	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( transUnit ) );
370
371	if ( libcfap ) {
372	// Generate the bodies of cfa library functions.
373	LibCfa::makeLibCfa( transUnit );
374	} // if
375
376	if ( declstatsp ) {
377	printDeclStats( transUnit );
378	return EXIT_SUCCESS;
379	} // if
380
381	if ( bresolvep ) {
382	dump( std::move( transUnit ) );
383	return EXIT_SUCCESS;
384	} // if
385
386	if ( resolvprotop ) {
387	dumpAsResolverProto( transUnit );
388	return EXIT_SUCCESS;
389	} // if
390
391	PASS( "Resolve", ResolvExpr::resolve( transUnit ) );
392	if ( exprp ) {
393	dump( std::move( transUnit ) );
394	return EXIT_SUCCESS;
395	} // if
396
397	forceFillCodeLocations( transUnit );
398
399	PASS( "Fix Init", InitTweak::fix(transUnit, buildingLibrary()));
400
401	// fix ObjectDecl - replaces ConstructorInit nodes
402	if ( ctorinitp ) {
403	dump( std::move( transUnit ) );
404	return EXIT_SUCCESS;
405	} // if
406
407	// Currently not working due to unresolved issues with UniqueExpr
408	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
409
410	PASS( "Translate Tries", ControlStruct::translateTries( transUnit ) );
411	PASS( "Gen Waitfor", Concurrency::generateWaitFor( transUnit ) );
412
413	// Needs to happen before tuple types are expanded.
414	PASS( "Convert Specializations", GenPoly::convertSpecializations( transUnit ) );
415
416	PASS( "Expand Tuples", Tuples::expandTuples( transUnit ) );
417
418	if ( tuplep ) {
419	dump( std::move( transUnit ) );
420	return EXIT_SUCCESS;
421	} // if
422
423	// Must come after Translate Tries.
424	PASS( "Virtual Expand Casts", Virtual::expandCasts( transUnit ) );
425
426	PASS( "Instantiate Generics", GenPoly::instantiateGeneric( transUnit ) );
427	if ( genericsp ) {
428	dump( std::move( transUnit ) );
429	return EXIT_SUCCESS;
430	} // if
431
432	PASS( "Convert L-Value", GenPoly::convertLvalue( transUnit ) );
433
434	translationUnit = convert( std::move( transUnit ) );
435
436	if ( bboxp ) {
437	dump( translationUnit );
438	return EXIT_SUCCESS;
439	} // if
440	PASS( "Box", GenPoly::box( translationUnit ) );
441
442	PASS( "Link-Once", CodeGen::translateLinkOnce( translationUnit ) );
443
444	// Code has been lowered to C, now we can start generation.
445
446	if ( bcodegenp ) {
447	dump( translationUnit );
448	return EXIT_SUCCESS;
449	} // if
450
451	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
452	output = new ofstream( argv[ optind ] );
453	} // if
454
455	CodeTools::fillLocations( translationUnit );
456	PASS( "Code Gen", CodeGen::generate( translationUnit, *output, ! genproto, prettycodegenp, true, linemarks ) );
457
458	CodeGen::FixMain::fix( translationUnit, *output,
459	(PreludeDirector + "/bootloader.c").c_str() );
460	if ( output != &cout ) {
461	delete output;
462	} // if
463	} catch ( SemanticErrorException & e ) {
464	if ( errorp ) {
465	cerr << "---AST at error:---" << endl;
466	// We check which section the errors came from without looking at
467	// transUnit because std::move means it could look like anything.
468	if ( !translationUnit.empty() ) {
469	dump( translationUnit, cerr );
470	} else {
471	dump( std::move( transUnit ), cerr );
472	}
473	cerr << endl << "---End of AST, begin error message:---\n" << endl;
474	} // if
475	e.print();
476	if ( output != &cout ) {
477	delete output;
478	} // if
479	return EXIT_FAILURE;
480	} catch ( std::bad_alloc & ) {
481	cerr << "cfa-cpp compilation error std::bad_alloc" << endl;
482	backtrace( 1 );
483	abort();
484	} catch ( ... ) {
485	exception_ptr eptr = current_exception();
486	try {
487	if (eptr) {
488	rethrow_exception(eptr);
489	} else {
490	cerr << "cfa-cpp compilation error exception uncaught and unknown" << endl;
491	} // if
492	} catch( const exception & e ) {
493	cerr << "cfa-cpp compilation error uncaught exception \"" << e.what() << "\"\n";
494	} // try
495	return EXIT_FAILURE;
496	} // try
497
498	deleteAll( translationUnit );
499	Stats::print();
500	return EXIT_SUCCESS;
501	} // main
502
503
504	static const char optstring[] = ":c:ghlLmNnpdP:S:twW:D:";
505
506	enum { PreludeDir = 128 };
507	static struct option long_opts[] = {
508	{ "colors", required_argument, nullptr, 'c' },
509	{ "gdb", no_argument, nullptr, 'g' },
510	{ "help", no_argument, nullptr, 'h' },
511	{ "libcfa", no_argument, nullptr, 'l' },
512	{ "linemarks", no_argument, nullptr, 'L' },
513	{ "no-main", no_argument, 0, 'm' },
514	{ "no-linemarks", no_argument, nullptr, 'N' },
515	{ "no-prelude", no_argument, nullptr, 'n' },
516	{ "prototypes", no_argument, nullptr, 'p' },
517	{ "deterministic-out", no_argument, nullptr, 'd' },
518	{ "print", required_argument, nullptr, 'P' },
519	{ "prelude-dir", required_argument, nullptr, PreludeDir },
520	{ "statistics", required_argument, nullptr, 'S' },
521	{ "tree", no_argument, nullptr, 't' },
522	{ "", no_argument, nullptr, 0 }, // -w
523	{ "", no_argument, nullptr, 0 }, // -W
524	{ "", no_argument, nullptr, 0 }, // -D
525	{ nullptr, 0, nullptr, 0 }
526	}; // long_opts
527
528	static const char * description[] = {
529	"diagnostic color: never, always, auto", // -c
530	"wait for gdb to attach", // -g
531	"print translator help message", // -h
532	"generate libcfa.c", // -l
533	"generate line marks", // -L
534	"do not replace main", // -m
535	"do not generate line marks", // -N
536	"do not read prelude", // -n
537	"do not generate prelude prototypes => prelude not printed", // -p
538	"only print deterministic output", // -d
539	"print", // -P
540	"<directory> prelude directory for debug/nodebug", // no flag
541	"<option-list> enable profiling information: counters, heap, time, all, none", // -S
542	"building cfa standard lib", // -t
543	"", // -w
544	"", // -W
545	"", // -D
546	}; // description
547
548	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
549
550	static struct Printopts {
551	const char * name;
552	int & flag;
553	int val;
554	const char * descript;
555	} printopts[] = {
556	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
557	{ "asterr", errorp, true, "print AST on error" },
558	{ "declstats", declstatsp, true, "code property statistics" },
559	{ "parse", yydebug, true, "yacc (parsing) debug information" },
560	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
561	{ "rproto", resolvprotop, true, "resolver-proto instance" },
562	{ "rsteps", resolvep, true, "print resolver steps" },
563	// code dumps
564	{ "ast", astp, true, "print AST after parsing" },
565	{ "exdecl", exdeclp, true, "print AST after translating exception decls" },
566	{ "symevt", symtabp, true, "print AST after symbol table events" },
567	{ "altexpr", expraltp, true, "print alternatives for expressions" },
568	{ "astdecl", validp, true, "print AST after declaration validation pass" },
569	{ "resolver", bresolvep, true, "print AST before resolver step" },
570	{ "astexpr", exprp, true, "print AST after expression analysis" },
571	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
572	{ "tuple", tuplep, true, "print AST after tuple expansion" },
573	{ "astgen", genericsp, true, "print AST after instantiate generics" },
574	{ "box", bboxp, true, "print AST before box step" },
575	{ "codegen", bcodegenp, true, "print AST before code generation" },
576	};
577	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
578
579	static void usage( char * argv[] ) {
580	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
581	int i = 0, j = 1; // j skips starting colon
582	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
583	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
584	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
585	cout << " -" << optstring[j] << ",";
586	} else { // no flag
587	j -= 1; // compensate
588	cout << " ";
589	} // if
590	cout << " --" << left << setw(12) << long_opts[i].name << " ";
591	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
592	cout << "one of: " << endl;
593	for ( int i = 0; i < printoptsSize; i += 1 ) {
594	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
595	} // for
596	} else {
597	cout << description[i] << endl;
598	} // if
599	} // if
600	if ( optstring[j + 1] == ':' ) j += 1;
601	} // for
602	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
603	exit( EXIT_FAILURE );
604	} // usage
605
606	static void parse_cmdline( int argc, char * argv[] ) {
607	opterr = 0; // (global) prevent getopt from printing error messages
608
609	bool Wsuppress = false, Werror = false;
610	int c;
611	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
612	switch ( c ) {
613	case 'c': // diagnostic colors
614	if ( strcmp( optarg, "always" ) == 0 ) {
615	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
616	} else if ( strcmp( optarg, "never" ) == 0 ) {
617	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
618	} else if ( strcmp( optarg, "auto" ) == 0 ) {
619	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
620	} // if
621	break;
622	case 'h': // help message
623	usage( argv ); // no return
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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