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source: src/main.cc @ 5007618

ast-experimental

Last change on this file since 5007618 was bccd70a, checked in by Andrew Beach <ajbeach@…>, 11 months ago
Removed internal code from TypeSubstitution? header. It caused a chain of include problems, which have been corrected.
Property mode set to `100644`
File size: 28.7 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 : 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 "AST/Pass.hpp" // for pass_visitor_stats
35	#include "AST/TranslationUnit.hpp" // for TranslationUnit
36	#include "AST/Util.hpp" // for checkInvariants
37	#include "CompilationState.h"
38	#include "../config.h" // for CFA_LIBDIR
39	#include "CodeGen/FixMain.h" // for FixMain
40	#include "CodeGen/FixNames.h" // for fixNames
41	#include "CodeGen/Generate.h" // for generate
42	#include "CodeGen/LinkOnce.h" // for translateLinkOnce
43	#include "CodeTools/TrackLoc.h" // for fillLocations
44	#include "Common/CodeLocationTools.hpp" // for forceFillCodeLocations
45	#include "Common/DeclStats.hpp" // for printDeclStats
46	#include "Common/ResolvProtoDump.hpp" // for dumpAsResolverProto
47	#include "Common/Stats.h" // for Stats
48	#include "Common/utility.h" // for deleteAll, filter, printAll
49	#include "Concurrency/Actors.hpp" // for implementActors
50	#include "Concurrency/Keywords.h" // for implementMutex, implement...
51	#include "Concurrency/Waitfor.h" // for generateWaitfor
52	#include "Concurrency/Waituntil.hpp" // for generateWaitUntil
53	#include "ControlStruct/ExceptDecl.h" // for translateExcept
54	#include "ControlStruct/ExceptTranslate.h" // for translateThrows, translat...
55	#include "ControlStruct/FixLabels.hpp" // for fixLabels
56	#include "ControlStruct/HoistControlDecls.hpp" // hoistControlDecls
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/RunParser.hpp" // for buildList, dumpParseTree,...
65	#include "ResolvExpr/CandidatePrinter.hpp" // for printCandidates
66	#include "ResolvExpr/Resolver.h" // for resolve
67	#include "SynTree/LinkageSpec.h" // for Spec, Cforall, Intrinsic
68	#include "SynTree/Declaration.h" // for Declaration
69	#include "Tuples/Tuples.h" // for expandMemberTuples, expan...
70	#include "Validate/Autogen.hpp" // for autogenerateRoutines
71	#include "Validate/CompoundLiteral.hpp" // for handleCompoundLiterals
72	#include "Validate/EliminateTypedef.hpp" // for eliminateTypedef
73	#include "Validate/EnumAndPointerDecay.hpp" // for decayEnumsAndPointers
74	#include "Validate/FindSpecialDecls.h" // for findGlobalDecls
75	#include "Validate/FixQualifiedTypes.hpp" // for fixQualifiedTypes
76	#include "Validate/FixReturnTypes.hpp" // for fixReturnTypes
77	#include "Validate/ForallPointerDecay.hpp" // for decayForallPointers
78	#include "Validate/GenericParameter.hpp" // for fillGenericParameters, tr...
79	#include "Validate/HoistStruct.hpp" // for hoistStruct
80	#include "Validate/HoistTypeDecls.hpp" // for hoistTypeDecls
81	#include "Validate/InitializerLength.hpp" // for setLengthFromInitializer
82	#include "Validate/LabelAddressFixer.hpp" // for fixLabelAddresses
83	#include "Validate/LinkReferenceToTypes.hpp" // for linkReferenceToTypes
84	#include "Validate/ReplaceTypedef.hpp" // for replaceTypedef
85	#include "Validate/ReturnCheck.hpp" // for checkReturnStatements
86	#include "Validate/VerifyCtorDtorAssign.hpp" // for verifyCtorDtorAssign
87	#include "Virtual/ExpandCasts.h" // for expandCasts
88	#include "Virtual/VirtualDtor.hpp" // for implementVirtDtors
89
90	static void NewPass( const char * const name ) {
91	Stats::Heap::newPass( name );
92	using namespace Stats::Counters;
93	{
94	static auto group = build<CounterGroup>( "Pass Visitor" );
95	auto pass = build<CounterGroup>( name, group );
96	pass_visitor_stats.depth = 0;
97	pass_visitor_stats.avg = build<AverageCounter<double>>( "Average Depth", pass );
98	pass_visitor_stats.max = build<MaxCounter<double>>( "Max Depth", pass );
99	}
100	{
101	static auto group = build<CounterGroup>( "Syntax Node" );
102	auto pass = build<CounterGroup>( name, group );
103	BaseSyntaxNode::new_nodes = build<SimpleCounter>( "Allocs", pass );
104	}
105	}
106
107	// Helpers for checkInvariant:
108	void checkInvariants( std::list< Declaration * > & ) {}
109	using ast::checkInvariants;
110
111	#define PASS( name, pass, unit, ... ) \
112	if ( errorp ) { cerr << name << endl; } \
113	NewPass(name); \
114	Stats::Time::StartBlock(name); \
115	pass(unit,##__VA_ARGS__); \
116	Stats::Time::StopBlock(); \
117	if ( invariant ) { \
118	checkInvariants(unit); \
119	}
120
121	#define DUMP( cond, unit ) \
122	if ( cond ) { \
123	dump(unit); \
124	return EXIT_SUCCESS; \
125	}
126
127	static bool waiting_for_gdb = false; // flag to set cfa-cpp to wait for gdb on start
128
129	static string PreludeDirector = "";
130
131	static void parse_cmdline( int argc, char * argv[] );
132	static void dump( list< Declaration * > & translationUnit, ostream & out = cout );
133	static void dump( ast::TranslationUnit && transUnit, ostream & out = cout );
134
135	static void backtrace( int start ) { // skip first N stack frames
136	enum { Frames = 50, }; // maximum number of stack frames
137	void * array[Frames];
138	size_t size = ::backtrace( array, Frames );
139	char ** messages = ::backtrace_symbols( array, size ); // does not demangle names
140
141	*index( messages[0], '(' ) = '\0'; // find executable name
142	cerr << "Stack back trace for: " << messages[0] << endl;
143
144	// skip last 2 stack frames after main
145	for ( unsigned int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
146	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
147
148	for ( char * p = messages[i]; *p; p += 1 ) { // find parantheses and +offset
149	if ( *p == '(' ) {
150	mangled_name = p;
151	} else if ( *p == '+' ) {
152	offset_begin = p;
153	} else if ( *p == ')' ) {
154	offset_end = p;
155	break;
156	} // if
157	} // for
158
159	// if line contains symbol, attempt to demangle
160	int frameNo = i - start;
161	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
162	*mangled_name++ = '\0'; // delimit strings
163	*offset_begin++ = '\0';
164	*offset_end++ = '\0';
165
166	int status;
167	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
168	// bug in __cxa_demangle for single-character lower-case non-mangled names
169	if ( status == 0 ) { // demangling successful ?
170	cerr << "(" << frameNo << ") " << messages[i] << " : "
171	<< real_name << "+" << offset_begin << offset_end << endl;
172	} else { // otherwise, output mangled name
173	cerr << "(" << frameNo << ") " << messages[i] << " : "
174	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
175	} // if
176
177	free( real_name );
178	} else { // otherwise, print the whole line
179	cerr << "(" << frameNo << ") " << messages[i] << endl;
180	} // if
181	} // for
182
183	free( messages );
184	} // backtrace
185
186	#define SIGPARMS int sig __attribute__(( unused )), siginfo_t * sfp __attribute__(( unused )), ucontext_t * cxt __attribute__(( unused ))
187
188	static void _Signal(struct sigaction & act, int sig, int flags ) {
189	act.sa_flags = flags;
190
191	if ( sigaction( sig, &act, nullptr ) == -1 ) {
192	cerr << "cfa-cpp compilation error problem installing signal handler, error(" << errno << ") " << strerror( errno ) << endl;
193	_exit( EXIT_FAILURE );
194	} // if
195	}
196
197	static void Signal( int sig, void (* handler)(SIGPARMS), int flags ) {
198	struct sigaction act;
199	act.sa_sigaction = (void ()(int, siginfo_t , void *))handler;
200	_Signal(act, sig, flags);
201	} // Signal
202
203	static void Signal( int sig, void (* handler)(int), int flags ) {
204	struct sigaction act;
205	act.sa_handler = handler;
206	_Signal(act, sig, flags);
207	} // Signal
208
209	static void sigSegvBusHandler( SIGPARMS ) {
210	if ( sfp->si_addr == nullptr ) {
211	cerr << "Null pointer (nullptr) dereference." << endl;
212	} else {
213	cerr << (sig == SIGSEGV ? "Segment fault" : "Bus error") << " at memory location " << sfp->si_addr << "." << endl
214	<< "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;
215	} // if
216	backtrace( 2 ); // skip first 2 stack frames
217	abort(); // cause core dump for debugging
218	} // sigSegvBusHandler
219
220	static void sigFpeHandler( SIGPARMS ) {
221	const char * msg;
222
223	switch ( sfp->si_code ) {
224	case FPE_INTDIV: case FPE_FLTDIV: msg = "divide by zero"; break;
225	case FPE_FLTOVF: msg = "overflow"; break;
226	case FPE_FLTUND: msg = "underflow"; break;
227	case FPE_FLTRES: msg = "inexact result"; break;
228	case FPE_FLTINV: msg = "invalid operation"; break;
229	default: msg = "unknown";
230	} // choose
231	cerr << "Computation error " << msg << " at location " << sfp->si_addr << endl
232	<< "Possible cause is constant-expression evaluation invalid." << endl;
233	backtrace( 2 ); // skip first 2 stack frames
234	abort(); // cause core dump for debugging
235	} // sigFpeHandler
236
237	static void sigAbortHandler( SIGPARMS ) {
238	backtrace( 6 ); // skip first 6 stack frames
239	Signal( SIGABRT, SIG_DFL, SA_SIGINFO ); // reset default signal handler
240	raise( SIGABRT ); // reraise SIGABRT
241	} // sigAbortHandler
242
243	int main( int argc, char * argv[] ) {
244	FILE * input; // use FILE rather than istream because yyin is FILE
245	ostream * output = & cout;
246	list< Declaration * > translationUnit;
247	ast::TranslationUnit transUnit;
248
249	Signal( SIGSEGV, sigSegvBusHandler, SA_SIGINFO );
250	Signal( SIGBUS, sigSegvBusHandler, SA_SIGINFO );
251	Signal( SIGFPE, sigFpeHandler, SA_SIGINFO );
252	Signal( SIGABRT, sigAbortHandler, SA_SIGINFO );
253
254	// cout << "main" << endl;
255	// for ( int i = 0; i < argc; i += 1 ) {
256	// cout << '\t' << argv[i] << endl;
257	// } // for
258
259	parse_cmdline( argc, argv ); // process command-line arguments
260	CodeGen::FixMain::setReplaceMain( !nomainp );
261
262	if ( waiting_for_gdb ) {
263	cerr << "Waiting for gdb" << endl;
264	cerr << "run :" << endl;
265	cerr << " gdb attach " << getpid() << endl;
266	raise(SIGSTOP);
267	} // if
268
269	try {
270	// choose to read the program from a file or stdin
271	if ( optind < argc ) { // any commands after the flags ? => input file name
272	input = fopen( argv[ optind ], "r" );
273	assertf( input, "cannot open %s because %s\n", argv[ optind ], strerror( errno ) );
274	optind += 1;
275	} else { // no input file name
276	input = stdin;
277	} // if
278
279	Stats::Time::StartGlobal();
280	NewPass("Parse");
281	Stats::Time::StartBlock("Parse");
282
283	// read in the builtins, extras, and the prelude
284	if ( ! nopreludep ) { // include gcc builtins
285	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
286
287	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
288
289	// Read to gcc builtins, if not generating the cfa library
290	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cf").c_str(), "r" );
291	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
292	parse( gcc_builtins, ast::Linkage::Compiler );
293
294	// read the extra prelude in, if not generating the cfa library
295	FILE * extras = fopen( (PreludeDirector + "/extras.cf").c_str(), "r" );
296	assertf( extras, "cannot open extras.cf\n" );
297	parse( extras, ast::Linkage::BuiltinC );
298
299	if ( ! libcfap ) {
300	// read the prelude in, if not generating the cfa library
301	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
302	assertf( prelude, "cannot open prelude.cfa\n" );
303	parse( prelude, ast::Linkage::Intrinsic );
304
305	// Read to cfa builtins, if not generating the cfa library
306	FILE * builtins = fopen( (PreludeDirector + "/builtins.cf").c_str(), "r" );
307	assertf( builtins, "cannot open builtins.cf\n" );
308	parse( builtins, ast::Linkage::BuiltinCFA );
309	} // if
310	} // if
311
312	parse( input, libcfap ? ast::Linkage::Intrinsic : ast::Linkage::Cforall, yydebug );
313
314	transUnit = buildUnit();
315
316	DUMP( astp, std::move( transUnit ) );
317
318	Stats::Time::StopBlock();
319
320	if (Stats::Counters::enabled) {
321	ast::pass_visitor_stats.avg = Stats::Counters::build<Stats::Counters::AverageCounter<double>>("Average Depth - New");
322	ast::pass_visitor_stats.max = Stats::Counters::build<Stats::Counters::MaxCounter<double>>("Max depth - New");
323	}
324
325	PASS( "Hoist Type Decls", Validate::hoistTypeDecls, transUnit );
326
327	PASS( "Translate Exception Declarations", ControlStruct::translateExcept, transUnit );
328	DUMP( exdeclp, std::move( transUnit ) );
329	PASS( "Verify Ctor, Dtor & Assign", Validate::verifyCtorDtorAssign, transUnit );
330	PASS( "Replace Typedefs", Validate::replaceTypedef, transUnit );
331	PASS( "Fix Return Types", Validate::fixReturnTypes, transUnit );
332	PASS( "Enum and Pointer Decay", Validate::decayEnumsAndPointers, transUnit );
333
334	PASS( "Link Reference To Types", Validate::linkReferenceToTypes, transUnit );
335
336	PASS( "Fix Qualified Types", Validate::fixQualifiedTypes, transUnit );
337	PASS( "Hoist Struct", Validate::hoistStruct, transUnit );
338	PASS( "Eliminate Typedef", Validate::eliminateTypedef, transUnit );
339	PASS( "Validate Generic Parameters", Validate::fillGenericParameters, transUnit );
340	PASS( "Translate Dimensions", Validate::translateDimensionParameters, transUnit );
341	PASS( "Check Function Returns", Validate::checkReturnStatements, transUnit );
342	PASS( "Fix Return Statements", InitTweak::fixReturnStatements, transUnit );
343	PASS( "Implement Concurrent Keywords", Concurrency::implementKeywords, transUnit );
344	PASS( "Forall Pointer Decay", Validate::decayForallPointers, transUnit );
345	PASS( "Implement Waituntil", Concurrency::generateWaitUntil, transUnit );
346	PASS( "Hoist Control Declarations", ControlStruct::hoistControlDecls, transUnit );
347
348	PASS( "Generate Autogen Routines", Validate::autogenerateRoutines, transUnit );
349
350	PASS( "Implement Actors", Concurrency::implementActors, transUnit );
351	PASS( "Implement Virtual Destructors", Virtual::implementVirtDtors, transUnit );
352	PASS( "Implement Mutex", Concurrency::implementMutex, transUnit );
353	PASS( "Implement Thread Start", Concurrency::implementThreadStarter, transUnit );
354	PASS( "Compound Literal", Validate::handleCompoundLiterals, transUnit );
355	PASS( "Set Length From Initializer", Validate::setLengthFromInitializer, transUnit );
356	PASS( "Find Global Decls", Validate::findGlobalDecls, transUnit );
357	PASS( "Fix Label Address", Validate::fixLabelAddresses, transUnit );
358
359	if ( symtabp ) {
360	return EXIT_SUCCESS;
361	} // if
362
363	if ( expraltp ) {
364	ResolvExpr::printCandidates( transUnit );
365	return EXIT_SUCCESS;
366	} // if
367
368	DUMP( validp, std::move( transUnit ) );
369
370	PASS( "Translate Throws", ControlStruct::translateThrows, transUnit );
371	PASS( "Fix Labels", ControlStruct::fixLabels, transUnit );
372	PASS( "Fix Names", CodeGen::fixNames, transUnit );
373	PASS( "Gen Init", InitTweak::genInit, transUnit );
374	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples, transUnit );
375
376	if ( libcfap ) {
377	// Generate the bodies of cfa library functions.
378	LibCfa::makeLibCfa( transUnit );
379	} // if
380
381	if ( declstatsp ) {
382	printDeclStats( transUnit );
383	return EXIT_SUCCESS;
384	} // if
385
386	DUMP( bresolvep, std::move( transUnit ) );
387
388	if ( resolvprotop ) {
389	dumpAsResolverProto( transUnit );
390	return EXIT_SUCCESS;
391	} // if
392
393	PASS( "Resolve", ResolvExpr::resolve, transUnit );
394	DUMP( exprp, std::move( transUnit ) );
395
396	PASS( "Fix Init", InitTweak::fix, transUnit, buildingLibrary() );
397
398	// fix ObjectDecl - replaces ConstructorInit nodes
399	DUMP( ctorinitp, std::move( transUnit ) );
400
401	// Currently not working due to unresolved issues with UniqueExpr
402	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
403
404	PASS( "Translate Tries", ControlStruct::translateTries, transUnit );
405	PASS( "Gen Waitfor", Concurrency::generateWaitFor, transUnit );
406
407	// Needs to happen before tuple types are expanded.
408	PASS( "Convert Specializations", GenPoly::convertSpecializations, transUnit );
409
410	PASS( "Expand Tuples", Tuples::expandTuples, transUnit );
411	DUMP( tuplep, std::move( transUnit ) );
412
413	// Must come after Translate Tries.
414	PASS( "Virtual Expand Casts", Virtual::expandCasts, transUnit );
415
416	PASS( "Instantiate Generics", GenPoly::instantiateGeneric, transUnit );
417	DUMP( genericsp, std::move( transUnit ) );
418
419	PASS( "Convert L-Value", GenPoly::convertLvalue, transUnit );
420
421	translationUnit = convert( std::move( transUnit ) );
422
423	DUMP( bboxp, translationUnit );
424	PASS( "Box", GenPoly::box, translationUnit );
425
426	PASS( "Link-Once", CodeGen::translateLinkOnce, translationUnit );
427
428	// Code has been lowered to C, now we can start generation.
429
430	DUMP( bcodegenp, translationUnit );
431
432	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
433	output = new ofstream( argv[ optind ] );
434	} // if
435
436	CodeTools::fillLocations( translationUnit );
437	PASS( "Code Gen", CodeGen::generate, translationUnit, *output, ! genproto, prettycodegenp, true, linemarks );
438
439	CodeGen::FixMain::fix( translationUnit, *output,
440	(PreludeDirector + "/bootloader.c").c_str() );
441	if ( output != &cout ) {
442	delete output;
443	} // if
444	} catch ( SemanticErrorException & e ) {
445	if ( errorp ) {
446	cerr << "---AST at error:---" << endl;
447	// We check which section the errors came from without looking at
448	// transUnit because std::move means it could look like anything.
449	if ( !translationUnit.empty() ) {
450	dump( translationUnit, cerr );
451	} else {
452	dump( std::move( transUnit ), cerr );
453	}
454	cerr << endl << "---End of AST, begin error message:---\n" << endl;
455	} // if
456	e.print();
457	if ( output != &cout ) {
458	delete output;
459	} // if
460	return EXIT_FAILURE;
461	} catch ( std::bad_alloc & ) {
462	cerr << "cfa-cpp compilation error std::bad_alloc" << endl;
463	backtrace( 1 );
464	abort();
465	} catch ( ... ) {
466	exception_ptr eptr = current_exception();
467	try {
468	if (eptr) {
469	rethrow_exception(eptr);
470	} else {
471	cerr << "cfa-cpp compilation error exception uncaught and unknown" << endl;
472	} // if
473	} catch( const exception & e ) {
474	cerr << "cfa-cpp compilation error uncaught exception \"" << e.what() << "\"\n";
475	} // try
476	return EXIT_FAILURE;
477	} // try
478
479	deleteAll( translationUnit );
480	Stats::print();
481	return EXIT_SUCCESS;
482	} // main
483
484
485	static const char optstring[] = ":c:ghilLmNnpdP:S:twW:D:";
486
487	enum { PreludeDir = 128 };
488	static struct option long_opts[] = {
489	{ "colors", required_argument, nullptr, 'c' },
490	{ "gdb", no_argument, nullptr, 'g' },
491	{ "help", no_argument, nullptr, 'h' },
492	{ "invariant", no_argument, nullptr, 'i' },
493	{ "libcfa", no_argument, nullptr, 'l' },
494	{ "linemarks", no_argument, nullptr, 'L' },
495	{ "no-main", no_argument, nullptr, 'm' },
496	{ "no-linemarks", no_argument, nullptr, 'N' },
497	{ "no-prelude", no_argument, nullptr, 'n' },
498	{ "prototypes", no_argument, nullptr, 'p' },
499	{ "deterministic-out", no_argument, nullptr, 'd' },
500	{ "print", required_argument, nullptr, 'P' },
501	{ "prelude-dir", required_argument, nullptr, PreludeDir },
502	{ "statistics", required_argument, nullptr, 'S' },
503	{ "tree", no_argument, nullptr, 't' },
504	{ "", no_argument, nullptr, 0 }, // -w
505	{ "", no_argument, nullptr, 0 }, // -W
506	{ "", no_argument, nullptr, 0 }, // -D
507	{ nullptr, 0, nullptr, 0 }
508	}; // long_opts
509
510	static const char * description[] = {
511	"diagnostic color: never, always, auto", // -c
512	"wait for gdb to attach", // -g
513	"print translator help message", // -h
514	"invariant checking during AST passes", // -i
515	"generate libcfa.c", // -l
516	"generate line marks", // -L
517	"do not replace main", // -m
518	"do not generate line marks", // -N
519	"do not read prelude", // -n
520	"do not generate prelude prototypes => prelude not printed", // -p
521	"only print deterministic output", // -d
522	"print", // -P
523	"<directory> prelude directory for debug/nodebug", // no flag
524	"<option-list> enable profiling information: counters, heap, time, all, none", // -S
525	"building cfa standard lib", // -t
526	"", // -w
527	"", // -W
528	"", // -D
529	}; // description
530
531	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
532
533	static struct Printopts {
534	const char * name;
535	int & flag;
536	int val;
537	const char * descript;
538	} printopts[] = {
539	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
540	{ "asterr", errorp, true, "print AST on error" },
541	{ "declstats", declstatsp, true, "code property statistics" },
542	{ "parse", yydebug, true, "yacc (parsing) debug information" },
543	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
544	{ "rproto", resolvprotop, true, "resolver-proto instance" },
545	{ "rsteps", resolvep, true, "print resolver steps" },
546	// code dumps
547	{ "ast", astp, true, "print AST after parsing" },
548	{ "exdecl", exdeclp, true, "print AST after translating exception decls" },
549	{ "symevt", symtabp, true, "print AST after symbol table events" },
550	{ "altexpr", expraltp, true, "print alternatives for expressions" },
551	{ "astdecl", validp, true, "print AST after declaration validation pass" },
552	{ "resolver", bresolvep, true, "print AST before resolver step" },
553	{ "astexpr", exprp, true, "print AST after expression analysis" },
554	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
555	{ "tuple", tuplep, true, "print AST after tuple expansion" },
556	{ "astgen", genericsp, true, "print AST after instantiate generics" },
557	{ "box", bboxp, true, "print AST before box step" },
558	{ "codegen", bcodegenp, true, "print AST before code generation" },
559	};
560	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
561
562	static void usage( char * argv[] ) {
563	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
564	int i = 0, j = 1; // j skips starting colon
565	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
566	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
567	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
568	cout << " -" << optstring[j] << ",";
569	} else { // no flag
570	j -= 1; // compensate
571	cout << " ";
572	} // if
573	cout << " --" << left << setw(12) << long_opts[i].name << " ";
574	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
575	cout << "one of: " << endl;
576	for ( int i = 0; i < printoptsSize; i += 1 ) {
577	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
578	} // for
579	} else {
580	cout << description[i] << endl;
581	} // if
582	} // if
583	if ( optstring[j + 1] == ':' ) j += 1;
584	} // for
585	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
586	exit( EXIT_FAILURE );
587	} // usage
588
589	static void parse_cmdline( int argc, char * argv[] ) {
590	opterr = 0; // (global) prevent getopt from printing error messages
591
592	bool Wsuppress = false, Werror = false;
593	int c;
594	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
595	switch ( c ) {
596	case 'c': // diagnostic colors
597	if ( strcmp( optarg, "always" ) == 0 ) {
598	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
599	} else if ( strcmp( optarg, "never" ) == 0 ) {
600	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
601	} else if ( strcmp( optarg, "auto" ) == 0 ) {
602	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
603	} // if
604	break;
605	case 'h': // help message
606	usage( argv ); // no return
607	break;
608	case 'i': // invariant checking
609	invariant = true;
610	break;
611	case 'l': // generate libcfa.c
612	libcfap = true;
613	break;
614	case 'L': // generate line marks
615	linemarks = true;
616	break;
617	case 'm': // do not replace main
618	nomainp = true;
619	break;
620	case 'N': // do not generate line marks
621	linemarks = false;
622	break;
623	case 'n': // do not read prelude
624	nopreludep = true;
625	break;
626	case 'p': // generate prototypes for prelude functions
627	genproto = true;
628	break;
629	case 'd': // don't print non-deterministic output
630	deterministic_output = true;
631	break;
632	case 'P': // print options
633	for ( int i = 0;; i += 1 ) {
634	if ( i == printoptsSize ) {
635	cout << "Unknown --print option " << optarg << endl;
636	goto Default;
637	} // if
638	if ( strcmp( optarg, printopts[i].name ) == 0 ) {
639	printopts[i].flag = printopts[i].val;
640	break;
641	} // if
642	} // for
643	break;
644	case PreludeDir: // prelude directory for debug/nodebug, hidden
645	PreludeDirector = optarg;
646	break;
647	case 'S': // enable profiling information, argument comma separated list of names
648	Stats::parse_params( optarg );
649	break;
650	case 't': // building cfa stdlib
651	treep = true;
652	break;
653	case 'g': // wait for gdb
654	waiting_for_gdb = true;
655	break;
656	case 'w': // suppress all warnings, hidden
657	Wsuppress = true;
658	break;
659	case 'W': // coordinate gcc -W with CFA, hidden
660	if ( strcmp( optarg, "all" ) == 0 ) {
661	SemanticWarning_EnableAll();
662	} else if ( strcmp( optarg, "error" ) == 0 ) {
663	Werror = true;
664	} else {
665	char * warning = optarg;
666	Severity s;
667	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
668	warning += 3;
669	s = Severity::Suppress;
670	} else {
671	s = Severity::Warn;
672	} // if
673	SemanticWarning_Set( warning, s );
674	} // if
675	break;
676	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
677	break;
678	case '?': // unknown option
679	if ( optopt ) { // short option ?
680	cout << "Unknown option -" << (char)optopt << endl;
681	} else {
682	cout << "Unknown option " << argv[optind - 1] << endl;
683	} // if
684	goto Default;
685	case ':': // missing option
686	if ( optopt ) { // short option ?
687	cout << "Missing option for -" << (char)optopt << endl;
688	} else {
689	cout << "Missing option for " << argv[optind - 1] << endl;
690	} // if
691	goto Default;
692	Default:
693	default:
694	usage( argv ); // no return
695	} // switch
696	} // while
697
698	if ( Werror ) {
699	SemanticWarning_WarningAsError();
700	} // if
701	if ( Wsuppress ) {
702	SemanticWarning_SuppressAll();
703	} // if
704	// for ( const auto w : WarningFormats ) {
705	// cout << w.name << ' ' << (int)w.severity << endl;
706	// } // for
707	} // parse_cmdline
708
709	static bool notPrelude( Declaration * decl ) {
710	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
711	} // notPrelude
712
713	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
714	list< Declaration * > decls;
715
716	if ( genproto ) {
717	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
718	} else {
719	decls = translationUnit;
720	} // if
721
722	// depending on commandline options, either generate code or dump the AST
723	if ( codegenp ) {
724	CodeGen::generate( decls, out, ! genproto, prettycodegenp );
725	} else {
726	printAll( decls, out );
727	} // if
728	deleteAll( translationUnit );
729	} // dump
730
731	static void dump( ast::TranslationUnit && transUnit, ostream & out ) {
732	std::list< Declaration * > translationUnit = convert( std::move( transUnit ) );
733	dump( translationUnit, out );
734	}
735
736	// Local Variables: //
737	// tab-width: 4 //
738	// mode: c++ //
739	// compile-command: "make install" //
740	// End: //

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