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source: src/main.cc @ 28f8f15

ADT

Last change on this file since 28f8f15 was 52f9804, checked in by Andrew Beach <ajbeach@…>, 15 months ago
Update macros in main. DUMP is now a macro to save space/noise and the PASS macro now runs checkInvariants afterwards if --invariant is on.
Property mode set to `100644`
File size: 28.4 KB

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1	//
2	// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3	//
4	// The contents of this file are covered under the licence agreement in the
5	// file "LICENCE" distributed with Cforall.
6	//
7	// main.cc --
8	//
9	// Author : Peter Buhr and Rob Schluntz
10	// Created On : Fri May 15 23:12:02 2015
11	// Last Modified By : Peter A. Buhr
12	// Last Modified On : Mon Apr 10 21:12:17 2023
13	// Update Count : 682
14	//
15
16	#include <cxxabi.h> // for __cxa_demangle
17	#include <execinfo.h> // for backtrace, backtrace_symbols
18	#include <getopt.h> // for no_argument, optind, geto...
19	#include <cassert> // for assertf
20	#include <cstdio> // for fopen, FILE, fclose, stdin
21	#include <cstdlib> // for exit, free, abort, EXIT_F...
22	#include <csignal> // for signal, SIGABRT, SIGSEGV
23	#include <cstring> // for index
24	#include <fstream> // for ofstream
25	#include <iostream> // for operator<<, basic_ostream
26	#include <iomanip>
27	#include <iterator> // for back_inserter
28	#include <list> // for list
29	#include <string> // for char_traits, operator<<
30
31	using namespace std;
32
33	#include "AST/Convert.hpp"
34	#include "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 "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/RunParser.hpp" // for buildList, dumpParseTree,...
62	#include "ResolvExpr/CandidatePrinter.hpp" // for printCandidates
63	#include "ResolvExpr/Resolver.h" // for resolve
64	#include "SynTree/LinkageSpec.h" // for Spec, Cforall, Intrinsic
65	#include "SynTree/Declaration.h" // for Declaration
66	#include "Tuples/Tuples.h" // for expandMemberTuples, expan...
67	#include "Validate/Autogen.hpp" // for autogenerateRoutines
68	#include "Validate/CompoundLiteral.hpp" // for handleCompoundLiterals
69	#include "Validate/EliminateTypedef.hpp" // for eliminateTypedef
70	#include "Validate/EnumAndPointerDecay.hpp" // for decayEnumsAndPointers
71	#include "Validate/FindSpecialDecls.h" // for findGlobalDecls
72	#include "Validate/FixQualifiedTypes.hpp" // for fixQualifiedTypes
73	#include "Validate/FixReturnTypes.hpp" // for fixReturnTypes
74	#include "Validate/ForallPointerDecay.hpp" // for decayForallPointers
75	#include "Validate/GenericParameter.hpp" // for fillGenericParameters, tr...
76	#include "Validate/HoistStruct.hpp" // for hoistStruct
77	#include "Validate/HoistTypeDecls.hpp" // for hoistTypeDecls
78	#include "Validate/InitializerLength.hpp" // for setLengthFromInitializer
79	#include "Validate/LabelAddressFixer.hpp" // for fixLabelAddresses
80	#include "Validate/LinkReferenceToTypes.hpp" // for linkReferenceToTypes
81	#include "Validate/ReplaceTypedef.hpp" // for replaceTypedef
82	#include "Validate/ReturnCheck.hpp" // for checkReturnStatements
83	#include "Validate/VerifyCtorDtorAssign.hpp" // for verifyCtorDtorAssign
84	#include "Virtual/ExpandCasts.h" // for expandCasts
85	#include "Virtual/VirtualDtor.hpp" // for implementVirtDtors
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	// Helpers for checkInvariant:
105	void checkInvariants( std::list< Declaration * > & ) {}
106	using ast::checkInvariants;
107
108	#define PASS( name, pass, unit, ... ) \
109	if ( errorp ) { cerr << name << endl; } \
110	NewPass(name); \
111	Stats::Time::StartBlock(name); \
112	pass(unit,##__VA_ARGS__); \
113	Stats::Time::StopBlock(); \
114	if ( invariant ) { \
115	checkInvariants(unit); \
116	}
117
118	#define DUMP( cond, unit ) \
119	if ( cond ) { \
120	dump(unit); \
121	return EXIT_SUCCESS; \
122	}
123
124	static bool waiting_for_gdb = false; // flag to set cfa-cpp to wait for gdb on start
125
126	static string PreludeDirector = "";
127
128	static void parse_cmdline( int argc, char * argv[] );
129	static void dump( list< Declaration * > & translationUnit, ostream & out = cout );
130	static void dump( ast::TranslationUnit && transUnit, ostream & out = cout );
131
132	static void backtrace( int start ) { // skip first N stack frames
133	enum { Frames = 50, }; // maximum number of stack frames
134	void * array[Frames];
135	size_t size = ::backtrace( array, Frames );
136	char ** messages = ::backtrace_symbols( array, size ); // does not demangle names
137
138	*index( messages[0], '(' ) = '\0'; // find executable name
139	cerr << "Stack back trace for: " << messages[0] << endl;
140
141	// skip last 2 stack frames after main
142	for ( unsigned int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
143	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
144
145	for ( char * p = messages[i]; *p; p += 1 ) { // find parantheses and +offset
146	if ( *p == '(' ) {
147	mangled_name = p;
148	} else if ( *p == '+' ) {
149	offset_begin = p;
150	} else if ( *p == ')' ) {
151	offset_end = p;
152	break;
153	} // if
154	} // for
155
156	// if line contains symbol, attempt to demangle
157	int frameNo = i - start;
158	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
159	*mangled_name++ = '\0'; // delimit strings
160	*offset_begin++ = '\0';
161	*offset_end++ = '\0';
162
163	int status;
164	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
165	// bug in __cxa_demangle for single-character lower-case non-mangled names
166	if ( status == 0 ) { // demangling successful ?
167	cerr << "(" << frameNo << ") " << messages[i] << " : "
168	<< real_name << "+" << offset_begin << offset_end << endl;
169	} else { // otherwise, output mangled name
170	cerr << "(" << frameNo << ") " << messages[i] << " : "
171	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
172	} // if
173
174	free( real_name );
175	} else { // otherwise, print the whole line
176	cerr << "(" << frameNo << ") " << messages[i] << endl;
177	} // if
178	} // for
179
180	free( messages );
181	} // backtrace
182
183	#define SIGPARMS int sig __attribute__(( unused )), siginfo_t * sfp __attribute__(( unused )), ucontext_t * cxt __attribute__(( unused ))
184
185	static void _Signal(struct sigaction & act, int sig, int flags ) {
186	act.sa_flags = flags;
187
188	if ( sigaction( sig, &act, nullptr ) == -1 ) {
189	cerr << "cfa-cpp compilation error problem installing signal handler, error(" << errno << ") " << strerror( errno ) << endl;
190	_exit( EXIT_FAILURE );
191	} // if
192	}
193
194	static void Signal( int sig, void (* handler)(SIGPARMS), int flags ) {
195	struct sigaction act;
196	act.sa_sigaction = (void ()(int, siginfo_t , void *))handler;
197	_Signal(act, sig, flags);
198	} // Signal
199
200	static void Signal( int sig, void (* handler)(int), int flags ) {
201	struct sigaction act;
202	act.sa_handler = handler;
203	_Signal(act, sig, flags);
204	} // Signal
205
206	static void sigSegvBusHandler( SIGPARMS ) {
207	if ( sfp->si_addr == nullptr ) {
208	cerr << "Null pointer (nullptr) dereference." << endl;
209	} else {
210	cerr << (sig == SIGSEGV ? "Segment fault" : "Bus error") << " at memory location " << sfp->si_addr << "." << endl
211	<< "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;
212	} // if
213	backtrace( 2 ); // skip first 2 stack frames
214	abort(); // cause core dump for debugging
215	} // sigSegvBusHandler
216
217	static void sigFpeHandler( SIGPARMS ) {
218	const char * msg;
219
220	switch ( sfp->si_code ) {
221	case FPE_INTDIV: case FPE_FLTDIV: msg = "divide by zero"; break;
222	case FPE_FLTOVF: msg = "overflow"; break;
223	case FPE_FLTUND: msg = "underflow"; break;
224	case FPE_FLTRES: msg = "inexact result"; break;
225	case FPE_FLTINV: msg = "invalid operation"; break;
226	default: msg = "unknown";
227	} // choose
228	cerr << "Computation error " << msg << " at location " << sfp->si_addr << endl
229	<< "Possible cause is constant-expression evaluation invalid." << endl;
230	backtrace( 2 ); // skip first 2 stack frames
231	abort(); // cause core dump for debugging
232	} // sigFpeHandler
233
234	static void sigAbortHandler( SIGPARMS ) {
235	backtrace( 6 ); // skip first 6 stack frames
236	Signal( SIGABRT, SIG_DFL, SA_SIGINFO ); // reset default signal handler
237	raise( SIGABRT ); // reraise SIGABRT
238	} // sigAbortHandler
239
240	int main( int argc, char * argv[] ) {
241	FILE * input; // use FILE rather than istream because yyin is FILE
242	ostream * output = & cout;
243	list< Declaration * > translationUnit;
244	ast::TranslationUnit transUnit;
245
246	Signal( SIGSEGV, sigSegvBusHandler, SA_SIGINFO );
247	Signal( SIGBUS, sigSegvBusHandler, SA_SIGINFO );
248	Signal( SIGFPE, sigFpeHandler, SA_SIGINFO );
249	Signal( SIGABRT, sigAbortHandler, SA_SIGINFO );
250
251	// cout << "main" << endl;
252	// for ( int i = 0; i < argc; i += 1 ) {
253	// cout << '\t' << argv[i] << endl;
254	// } // for
255
256	parse_cmdline( argc, argv ); // process command-line arguments
257	CodeGen::FixMain::setReplaceMain( !nomainp );
258
259	if ( waiting_for_gdb ) {
260	cerr << "Waiting for gdb" << endl;
261	cerr << "run :" << endl;
262	cerr << " gdb attach " << getpid() << endl;
263	raise(SIGSTOP);
264	} // if
265
266	try {
267	// choose to read the program from a file or stdin
268	if ( optind < argc ) { // any commands after the flags ? => input file name
269	input = fopen( argv[ optind ], "r" );
270	assertf( input, "cannot open %s because %s\n", argv[ optind ], strerror( errno ) );
271	optind += 1;
272	} else { // no input file name
273	input = stdin;
274	} // if
275
276	Stats::Time::StartGlobal();
277	NewPass("Parse");
278	Stats::Time::StartBlock("Parse");
279
280	// read in the builtins, extras, and the prelude
281	if ( ! nopreludep ) { // include gcc builtins
282	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
283
284	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
285
286	// Read to gcc builtins, if not generating the cfa library
287	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cf").c_str(), "r" );
288	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
289	parse( gcc_builtins, ast::Linkage::Compiler );
290
291	// read the extra prelude in, if not generating the cfa library
292	FILE * extras = fopen( (PreludeDirector + "/extras.cf").c_str(), "r" );
293	assertf( extras, "cannot open extras.cf\n" );
294	parse( extras, ast::Linkage::BuiltinC );
295
296	if ( ! libcfap ) {
297	// read the prelude in, if not generating the cfa library
298	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
299	assertf( prelude, "cannot open prelude.cfa\n" );
300	parse( prelude, ast::Linkage::Intrinsic );
301
302	// Read to cfa builtins, if not generating the cfa library
303	FILE * builtins = fopen( (PreludeDirector + "/builtins.cf").c_str(), "r" );
304	assertf( builtins, "cannot open builtins.cf\n" );
305	parse( builtins, ast::Linkage::BuiltinCFA );
306	} // if
307	} // if
308
309	parse( input, libcfap ? ast::Linkage::Intrinsic : ast::Linkage::Cforall, yydebug );
310
311	transUnit = buildUnit();
312
313	DUMP( astp, std::move( transUnit ) );
314
315	Stats::Time::StopBlock();
316
317	if (Stats::Counters::enabled) {
318	ast::pass_visitor_stats.avg = Stats::Counters::build<Stats::Counters::AverageCounter<double>>("Average Depth - New");
319	ast::pass_visitor_stats.max = Stats::Counters::build<Stats::Counters::MaxCounter<double>>("Max depth - New");
320	}
321
322	PASS( "Hoist Type Decls", Validate::hoistTypeDecls, transUnit );
323
324	PASS( "Translate Exception Declarations", ControlStruct::translateExcept, transUnit );
325	DUMP( exdeclp, std::move( transUnit ) );
326	PASS( "Verify Ctor, Dtor & Assign", Validate::verifyCtorDtorAssign, transUnit );
327	PASS( "Replace Typedefs", Validate::replaceTypedef, transUnit );
328	PASS( "Fix Return Types", Validate::fixReturnTypes, transUnit );
329	PASS( "Enum and Pointer Decay", Validate::decayEnumsAndPointers, transUnit );
330
331	PASS( "Link Reference To Types", Validate::linkReferenceToTypes, transUnit );
332
333	PASS( "Fix Qualified Types", Validate::fixQualifiedTypes, transUnit );
334	PASS( "Hoist Struct", Validate::hoistStruct, transUnit );
335	PASS( "Eliminate Typedef", Validate::eliminateTypedef, transUnit );
336	PASS( "Validate Generic Parameters", Validate::fillGenericParameters, transUnit );
337	PASS( "Translate Dimensions", Validate::translateDimensionParameters, transUnit );
338	PASS( "Check Function Returns", Validate::checkReturnStatements, transUnit );
339	PASS( "Fix Return Statements", InitTweak::fixReturnStatements, transUnit );
340	PASS( "Implement Concurrent Keywords", Concurrency::implementKeywords, transUnit );
341	PASS( "Forall Pointer Decay", Validate::decayForallPointers, transUnit );
342	PASS( "Hoist Control Declarations", ControlStruct::hoistControlDecls, transUnit );
343
344	PASS( "Generate Autogen Routines", Validate::autogenerateRoutines, transUnit );
345
346	PASS( "Implement Actors", Concurrency::implementActors, transUnit );
347	PASS( "Implement Virtual Destructors", Virtual::implementVirtDtors, transUnit );
348	PASS( "Implement Mutex", Concurrency::implementMutex, transUnit );
349	PASS( "Implement Thread Start", Concurrency::implementThreadStarter, transUnit );
350	PASS( "Compound Literal", Validate::handleCompoundLiterals, transUnit );
351	PASS( "Set Length From Initializer", Validate::setLengthFromInitializer, transUnit );
352	PASS( "Find Global Decls", Validate::findGlobalDecls, transUnit );
353	PASS( "Fix Label Address", Validate::fixLabelAddresses, transUnit );
354
355	if ( symtabp ) {
356	return EXIT_SUCCESS;
357	} // if
358
359	if ( expraltp ) {
360	ResolvExpr::printCandidates( transUnit );
361	return EXIT_SUCCESS;
362	} // if
363
364	DUMP( validp, std::move( transUnit ) );
365
366	PASS( "Translate Throws", ControlStruct::translateThrows, transUnit );
367	PASS( "Fix Labels", ControlStruct::fixLabels, transUnit );
368	PASS( "Fix Names", CodeGen::fixNames, transUnit );
369	PASS( "Gen Init", InitTweak::genInit, transUnit );
370	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples, transUnit );
371
372	if ( libcfap ) {
373	// Generate the bodies of cfa library functions.
374	LibCfa::makeLibCfa( transUnit );
375	} // if
376
377	if ( declstatsp ) {
378	printDeclStats( transUnit );
379	return EXIT_SUCCESS;
380	} // if
381
382	DUMP( bresolvep, std::move( transUnit ) );
383
384	if ( resolvprotop ) {
385	dumpAsResolverProto( transUnit );
386	return EXIT_SUCCESS;
387	} // if
388
389	PASS( "Resolve", ResolvExpr::resolve, transUnit );
390	DUMP( exprp, std::move( transUnit ) );
391
392	PASS( "Fix Init", InitTweak::fix, transUnit, buildingLibrary() );
393
394	// fix ObjectDecl - replaces ConstructorInit nodes
395	DUMP( ctorinitp, std::move( transUnit ) );
396
397	// Currently not working due to unresolved issues with UniqueExpr
398	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
399
400	PASS( "Translate Tries", ControlStruct::translateTries, transUnit );
401	PASS( "Gen Waitfor", Concurrency::generateWaitFor, transUnit );
402
403	// Needs to happen before tuple types are expanded.
404	PASS( "Convert Specializations", GenPoly::convertSpecializations, transUnit );
405
406	PASS( "Expand Tuples", Tuples::expandTuples, transUnit );
407	DUMP( tuplep, std::move( transUnit ) );
408
409	// Must come after Translate Tries.
410	PASS( "Virtual Expand Casts", Virtual::expandCasts, transUnit );
411
412	PASS( "Instantiate Generics", GenPoly::instantiateGeneric, transUnit );
413	DUMP( genericsp, std::move( transUnit ) );
414
415	PASS( "Convert L-Value", GenPoly::convertLvalue, transUnit );
416
417	translationUnit = convert( std::move( transUnit ) );
418
419	DUMP( bboxp, translationUnit );
420	PASS( "Box", GenPoly::box, translationUnit );
421
422	PASS( "Link-Once", CodeGen::translateLinkOnce, translationUnit );
423
424	// Code has been lowered to C, now we can start generation.
425
426	DUMP( bcodegenp, translationUnit );
427
428	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
429	output = new ofstream( argv[ optind ] );
430	} // if
431
432	CodeTools::fillLocations( translationUnit );
433	PASS( "Code Gen", CodeGen::generate, translationUnit, *output, ! genproto, prettycodegenp, true, linemarks );
434
435	CodeGen::FixMain::fix( translationUnit, *output,
436	(PreludeDirector + "/bootloader.c").c_str() );
437	if ( output != &cout ) {
438	delete output;
439	} // if
440	} catch ( SemanticErrorException & e ) {
441	if ( errorp ) {
442	cerr << "---AST at error:---" << endl;
443	// We check which section the errors came from without looking at
444	// transUnit because std::move means it could look like anything.
445	if ( !translationUnit.empty() ) {
446	dump( translationUnit, cerr );
447	} else {
448	dump( std::move( transUnit ), cerr );
449	}
450	cerr << endl << "---End of AST, begin error message:---\n" << endl;
451	} // if
452	e.print();
453	if ( output != &cout ) {
454	delete output;
455	} // if
456	return EXIT_FAILURE;
457	} catch ( std::bad_alloc & ) {
458	cerr << "cfa-cpp compilation error std::bad_alloc" << endl;
459	backtrace( 1 );
460	abort();
461	} catch ( ... ) {
462	exception_ptr eptr = current_exception();
463	try {
464	if (eptr) {
465	rethrow_exception(eptr);
466	} else {
467	cerr << "cfa-cpp compilation error exception uncaught and unknown" << endl;
468	} // if
469	} catch( const exception & e ) {
470	cerr << "cfa-cpp compilation error uncaught exception \"" << e.what() << "\"\n";
471	} // try
472	return EXIT_FAILURE;
473	} // try
474
475	deleteAll( translationUnit );
476	Stats::print();
477	return EXIT_SUCCESS;
478	} // main
479
480
481	static const char optstring[] = ":c:ghilLmNnpdP:S:twW:D:";
482
483	enum { PreludeDir = 128 };
484	static struct option long_opts[] = {
485	{ "colors", required_argument, nullptr, 'c' },
486	{ "gdb", no_argument, nullptr, 'g' },
487	{ "help", no_argument, nullptr, 'h' },
488	{ "invariant", no_argument, nullptr, 'i' },
489	{ "libcfa", no_argument, nullptr, 'l' },
490	{ "linemarks", no_argument, nullptr, 'L' },
491	{ "no-main", no_argument, nullptr, 'm' },
492	{ "no-linemarks", no_argument, nullptr, 'N' },
493	{ "no-prelude", no_argument, nullptr, 'n' },
494	{ "prototypes", no_argument, nullptr, 'p' },
495	{ "deterministic-out", no_argument, nullptr, 'd' },
496	{ "print", required_argument, nullptr, 'P' },
497	{ "prelude-dir", required_argument, nullptr, PreludeDir },
498	{ "statistics", required_argument, nullptr, 'S' },
499	{ "tree", no_argument, nullptr, 't' },
500	{ "", no_argument, nullptr, 0 }, // -w
501	{ "", no_argument, nullptr, 0 }, // -W
502	{ "", no_argument, nullptr, 0 }, // -D
503	{ nullptr, 0, nullptr, 0 }
504	}; // long_opts
505
506	static const char * description[] = {
507	"diagnostic color: never, always, auto", // -c
508	"wait for gdb to attach", // -g
509	"print translator help message", // -h
510	"invariant checking during AST passes", // -i
511	"generate libcfa.c", // -l
512	"generate line marks", // -L
513	"do not replace main", // -m
514	"do not generate line marks", // -N
515	"do not read prelude", // -n
516	"do not generate prelude prototypes => prelude not printed", // -p
517	"only print deterministic output", // -d
518	"print", // -P
519	"<directory> prelude directory for debug/nodebug", // no flag
520	"<option-list> enable profiling information: counters, heap, time, all, none", // -S
521	"building cfa standard lib", // -t
522	"", // -w
523	"", // -W
524	"", // -D
525	}; // description
526
527	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
528
529	static struct Printopts {
530	const char * name;
531	int & flag;
532	int val;
533	const char * descript;
534	} printopts[] = {
535	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
536	{ "asterr", errorp, true, "print AST on error" },
537	{ "declstats", declstatsp, true, "code property statistics" },
538	{ "parse", yydebug, true, "yacc (parsing) debug information" },
539	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
540	{ "rproto", resolvprotop, true, "resolver-proto instance" },
541	{ "rsteps", resolvep, true, "print resolver steps" },
542	// code dumps
543	{ "ast", astp, true, "print AST after parsing" },
544	{ "exdecl", exdeclp, true, "print AST after translating exception decls" },
545	{ "symevt", symtabp, true, "print AST after symbol table events" },
546	{ "altexpr", expraltp, true, "print alternatives for expressions" },
547	{ "astdecl", validp, true, "print AST after declaration validation pass" },
548	{ "resolver", bresolvep, true, "print AST before resolver step" },
549	{ "astexpr", exprp, true, "print AST after expression analysis" },
550	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
551	{ "tuple", tuplep, true, "print AST after tuple expansion" },
552	{ "astgen", genericsp, true, "print AST after instantiate generics" },
553	{ "box", bboxp, true, "print AST before box step" },
554	{ "codegen", bcodegenp, true, "print AST before code generation" },
555	};
556	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
557
558	static void usage( char * argv[] ) {
559	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
560	int i = 0, j = 1; // j skips starting colon
561	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
562	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
563	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
564	cout << " -" << optstring[j] << ",";
565	} else { // no flag
566	j -= 1; // compensate
567	cout << " ";
568	} // if
569	cout << " --" << left << setw(12) << long_opts[i].name << " ";
570	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
571	cout << "one of: " << endl;
572	for ( int i = 0; i < printoptsSize; i += 1 ) {
573	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
574	} // for
575	} else {
576	cout << description[i] << endl;
577	} // if
578	} // if
579	if ( optstring[j + 1] == ':' ) j += 1;
580	} // for
581	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
582	exit( EXIT_FAILURE );
583	} // usage
584
585	static void parse_cmdline( int argc, char * argv[] ) {
586	opterr = 0; // (global) prevent getopt from printing error messages
587
588	bool Wsuppress = false, Werror = false;
589	int c;
590	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
591	switch ( c ) {
592	case 'c': // diagnostic colors
593	if ( strcmp( optarg, "always" ) == 0 ) {
594	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
595	} else if ( strcmp( optarg, "never" ) == 0 ) {
596	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
597	} else if ( strcmp( optarg, "auto" ) == 0 ) {
598	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
599	} // if
600	break;
601	case 'h': // help message
602	usage( argv ); // no return
603	break;
604	case 'i': // invariant checking
605	invariant = true;
606	break;
607	case 'l': // generate libcfa.c
608	libcfap = true;
609	break;
610	case 'L': // generate line marks
611	linemarks = true;
612	break;
613	case 'm': // do not replace main
614	nomainp = true;
615	break;
616	case 'N': // do not generate line marks
617	linemarks = false;
618	break;
619	case 'n': // do not read prelude
620	nopreludep = true;
621	break;
622	case 'p': // generate prototypes for prelude functions
623	genproto = true;
624	break;
625	case 'd': // don't print non-deterministic output
626	deterministic_output = true;
627	break;
628	case 'P': // print options
629	for ( int i = 0;; i += 1 ) {
630	if ( i == printoptsSize ) {
631	cout << "Unknown --print option " << optarg << endl;
632	goto Default;
633	} // if
634	if ( strcmp( optarg, printopts[i].name ) == 0 ) {
635	printopts[i].flag = printopts[i].val;
636	break;
637	} // if
638	} // for
639	break;
640	case PreludeDir: // prelude directory for debug/nodebug, hidden
641	PreludeDirector = optarg;
642	break;
643	case 'S': // enable profiling information, argument comma separated list of names
644	Stats::parse_params( optarg );
645	break;
646	case 't': // building cfa stdlib
647	treep = true;
648	break;
649	case 'g': // wait for gdb
650	waiting_for_gdb = true;
651	break;
652	case 'w': // suppress all warnings, hidden
653	Wsuppress = true;
654	break;
655	case 'W': // coordinate gcc -W with CFA, hidden
656	if ( strcmp( optarg, "all" ) == 0 ) {
657	SemanticWarning_EnableAll();
658	} else if ( strcmp( optarg, "error" ) == 0 ) {
659	Werror = true;
660	} else {
661	char * warning = optarg;
662	Severity s;
663	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
664	warning += 3;
665	s = Severity::Suppress;
666	} else {
667	s = Severity::Warn;
668	} // if
669	SemanticWarning_Set( warning, s );
670	} // if
671	break;
672	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
673	break;
674	case '?': // unknown option
675	if ( optopt ) { // short option ?
676	cout << "Unknown option -" << (char)optopt << endl;
677	} else {
678	cout << "Unknown option " << argv[optind - 1] << endl;
679	} // if
680	goto Default;
681	case ':': // missing option
682	if ( optopt ) { // short option ?
683	cout << "Missing option for -" << (char)optopt << endl;
684	} else {
685	cout << "Missing option for " << argv[optind - 1] << endl;
686	} // if
687	goto Default;
688	Default:
689	default:
690	usage( argv ); // no return
691	} // switch
692	} // while
693
694	if ( Werror ) {
695	SemanticWarning_WarningAsError();
696	} // if
697	if ( Wsuppress ) {
698	SemanticWarning_SuppressAll();
699	} // if
700	// for ( const auto w : WarningFormats ) {
701	// cout << w.name << ' ' << (int)w.severity << endl;
702	// } // for
703	} // parse_cmdline
704
705	static bool notPrelude( Declaration * decl ) {
706	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
707	} // notPrelude
708
709	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
710	list< Declaration * > decls;
711
712	if ( genproto ) {
713	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
714	} else {
715	decls = translationUnit;
716	} // if
717
718	// depending on commandline options, either generate code or dump the AST
719	if ( codegenp ) {
720	CodeGen::generate( decls, out, ! genproto, prettycodegenp );
721	} else {
722	printAll( decls, out );
723	} // if
724	deleteAll( translationUnit );
725	} // dump
726
727	static void dump( ast::TranslationUnit && transUnit, ostream & out ) {
728	std::list< Declaration * > translationUnit = convert( std::move( transUnit ) );
729	dump( translationUnit, out );
730	}
731
732	// Local Variables: //
733	// tab-width: 4 //
734	// mode: c++ //
735	// compile-command: "make install" //
736	// End: //

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