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source: src/main.cc @ af5cfad6

Last change on this file since af5cfad6 was 2c38b15, checked in by Andrew Beach <ajbeach@…>, 18 months ago
Moved the using statement in main out of view of the includes. Tried moving 'Eliminate Typedef' closer to 'Replace Typedef' but it only made it one pass.
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	#include "AST/Convert.hpp"
32	#include "AST/Pass.hpp" // for pass_visitor_stats
33	#include "AST/TranslationUnit.hpp" // for TranslationUnit
34	#include "AST/Util.hpp" // for checkInvariants
35	#include "CompilationState.h"
36	#include "../config.h" // for CFA_LIBDIR
37	#include "CodeGen/FixMain.h" // for FixMain
38	#include "CodeGen/FixNames.h" // for fixNames
39	#include "CodeGen/Generate.h" // for generate
40	#include "CodeGen/LinkOnce.h" // for translateLinkOnce
41	#include "CodeTools/TrackLoc.h" // for fillLocations
42	#include "Common/CodeLocationTools.hpp" // for forceFillCodeLocations
43	#include "Common/DeclStats.hpp" // for printDeclStats
44	#include "Common/ResolvProtoDump.hpp" // for dumpAsResolverProto
45	#include "Common/Stats.h" // for Stats
46	#include "Common/utility.h" // for deleteAll, filter, printAll
47	#include "Concurrency/Actors.hpp" // for implementActors
48	#include "Concurrency/Keywords.h" // for implementMutex, implement...
49	#include "Concurrency/Waitfor.h" // for generateWaitfor
50	#include "Concurrency/Waituntil.hpp" // for generateWaitUntil
51	#include "ControlStruct/ExceptDecl.h" // for translateExcept
52	#include "ControlStruct/ExceptTranslate.h" // for translateThrows, translat...
53	#include "ControlStruct/FixLabels.hpp" // for fixLabels
54	#include "ControlStruct/HoistControlDecls.hpp" // hoistControlDecls
55	#include "GenPoly/Box.h" // for box
56	#include "GenPoly/InstantiateGeneric.h" // for instantiateGeneric
57	#include "GenPoly/Lvalue.h" // for convertLvalue
58	#include "GenPoly/Specialize.h" // for convertSpecializations
59	#include "InitTweak/FixInit.h" // for fix
60	#include "InitTweak/GenInit.h" // for genInit
61	#include "MakeLibCfa.h" // for makeLibCfa
62	#include "Parser/RunParser.hpp" // for buildList, dumpParseTree,...
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	#include "Virtual/VirtualDtor.hpp" // for implementVirtDtors
87
88	using namespace std;
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( "Eliminate Typedef", Validate::eliminateTypedef, transUnit );
338	PASS( "Hoist Struct", Validate::hoistStruct, 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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