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source: src/main.cc @ 77c01ec

ADTast-experimentalenumforall-pointer-decaypthread-emulationqualifiedEnum

Last change on this file since 77c01ec was 8e48fca4, checked in by Andrew Beach <ajbeach@…>, 3 years ago
Combined the code in FixMain? so it is all done with one pass.
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 : Fri Oct 29 16:34:00 2021
13	// Update Count : 655
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/DeclStats.h" // for printDeclStats
41	#include "CodeTools/ResolvProtoDump.h" // for dumpAsResolvProto
42	#include "CodeTools/TrackLoc.h" // for fillLocations
43	#include "Common/CodeLocationTools.hpp" // for forceFillCodeLocations
44	#include "Common/CompilerError.h" // for CompilerError
45	#include "Common/DeclStats.hpp" // for printDeclStats
46	#include "Common/ResolvProtoDump.hpp" // for dumpAsResolverProto
47	#include "Common/Stats.h"
48	#include "Common/PassVisitor.h"
49	#include "Common/SemanticError.h" // for SemanticError
50	#include "Common/UnimplementedError.h" // for UnimplementedError
51	#include "Common/utility.h" // for deleteAll, filter, printAll
52	#include "Concurrency/Waitfor.h" // for generateWaitfor
53	#include "ControlStruct/ExceptDecl.h" // for translateExcept
54	#include "ControlStruct/ExceptTranslate.h" // for translateEHM
55	#include "ControlStruct/Mutate.h" // for mutate
56	#include "GenPoly/Box.h" // for box
57	#include "GenPoly/InstantiateGeneric.h" // for instantiateGeneric
58	#include "GenPoly/Lvalue.h" // for convertLvalue
59	#include "GenPoly/Specialize.h" // for convertSpecializations
60	#include "InitTweak/FixInit.h" // for fix
61	#include "InitTweak/GenInit.h" // for genInit
62	#include "MakeLibCfa.h" // for makeLibCfa
63	#include "Parser/ParseNode.h" // for DeclarationNode, buildList
64	#include "Parser/TypedefTable.h" // for TypedefTable
65	#include "ResolvExpr/AlternativePrinter.h" // for AlternativePrinter
66	#include "ResolvExpr/Resolver.h" // for resolve
67	#include "SymTab/Validate.h" // for validate
68	#include "SynTree/LinkageSpec.h" // for Spec, Cforall, Intrinsic
69	#include "SynTree/Declaration.h" // for Declaration
70	#include "SynTree/Visitor.h" // for acceptAll
71	#include "Tuples/Tuples.h" // for expandMemberTuples, expan...
72	#include "Virtual/ExpandCasts.h" // for expandCasts
73
74
75	static void NewPass( const char * const name ) {
76	Stats::Heap::newPass( name );
77	using namespace Stats::Counters;
78	{
79	static auto group = build<CounterGroup>( "Pass Visitor" );
80	auto pass = build<CounterGroup>( name, group );
81	pass_visitor_stats.depth = 0;
82	pass_visitor_stats.avg = build<AverageCounter<double>>( "Average Depth", pass );
83	pass_visitor_stats.max = build<MaxCounter<double>>( "Max Depth", pass );
84	}
85	{
86	static auto group = build<CounterGroup>( "Syntax Node" );
87	auto pass = build<CounterGroup>( name, group );
88	BaseSyntaxNode::new_nodes = build<SimpleCounter>( "Allocs", pass );
89	}
90	}
91
92	#define PASS( name, pass ) \
93	if ( errorp ) { cerr << name << endl; } \
94	NewPass(name); \
95	Stats::Time::StartBlock(name); \
96	pass; \
97	Stats::Time::StopBlock();
98
99	LinkageSpec::Spec linkage = LinkageSpec::Cforall;
100	TypedefTable typedefTable;
101	DeclarationNode * parseTree = nullptr; // program parse tree
102
103	static bool waiting_for_gdb = false; // flag to set cfa-cpp to wait for gdb on start
104
105	static string PreludeDirector = "";
106
107	static void parse_cmdline( int argc, char * argv[] );
108	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit = false );
109	static void dump( list< Declaration * > & translationUnit, ostream & out = cout );
110	static void dump( ast::TranslationUnit && transUnit, ostream & out = cout );
111
112	static void backtrace( int start ) { // skip first N stack frames
113	enum { Frames = 50, }; // maximum number of stack frames
114	void * array[Frames];
115	size_t size = ::backtrace( array, Frames );
116	char ** messages = ::backtrace_symbols( array, size ); // does not demangle names
117
118	*index( messages[0], '(' ) = '\0'; // find executable name
119	cerr << "Stack back trace for: " << messages[0] << endl;
120
121	// skip last 2 stack frames after main
122	for ( unsigned int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
123	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
124
125	for ( char * p = messages[i]; *p; p += 1 ) { // find parantheses and +offset
126	if ( *p == '(' ) {
127	mangled_name = p;
128	} else if ( *p == '+' ) {
129	offset_begin = p;
130	} else if ( *p == ')' ) {
131	offset_end = p;
132	break;
133	} // if
134	} // for
135
136	// if line contains symbol, attempt to demangle
137	int frameNo = i - start;
138	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
139	*mangled_name++ = '\0'; // delimit strings
140	*offset_begin++ = '\0';
141	*offset_end++ = '\0';
142
143	int status;
144	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
145	// bug in __cxa_demangle for single-character lower-case non-mangled names
146	if ( status == 0 ) { // demangling successful ?
147	cerr << "(" << frameNo << ") " << messages[i] << " : "
148	<< real_name << "+" << offset_begin << offset_end << endl;
149	} else { // otherwise, output mangled name
150	cerr << "(" << frameNo << ") " << messages[i] << " : "
151	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
152	} // if
153
154	free( real_name );
155	} else { // otherwise, print the whole line
156	cerr << "(" << frameNo << ") " << messages[i] << endl;
157	} // if
158	} // for
159
160	free( messages );
161	} // backtrace
162
163	#define SIGPARMS int sig __attribute__(( unused )), siginfo_t * sfp __attribute__(( unused )), ucontext_t * cxt __attribute__(( unused ))
164
165	static void _Signal(struct sigaction & act, int sig, int flags ) {
166	act.sa_flags = flags;
167
168	if ( sigaction( sig, &act, nullptr ) == -1 ) {
169	cerr << "cfa-cpp compilation error problem installing signal handler, error(" << errno << ") " << strerror( errno ) << endl;
170	_exit( EXIT_FAILURE );
171	} // if
172	}
173
174	static void Signal( int sig, void (* handler)(SIGPARMS), int flags ) {
175	struct sigaction act;
176	act.sa_sigaction = (void ()(int, siginfo_t , void *))handler;
177	_Signal(act, sig, flags);
178	} // Signal
179
180	static void Signal( int sig, void (* handler)(int), int flags ) {
181	struct sigaction act;
182	act.sa_handler = handler;
183	_Signal(act, sig, flags);
184	} // Signal
185
186	static void sigSegvBusHandler( SIGPARMS ) {
187	if ( sfp->si_addr == nullptr ) {
188	cerr << "Null pointer (nullptr) dereference." << endl;
189	} else {
190	cerr << (sig == SIGSEGV ? "Segment fault" : "Bus error") << " at memory location " << sfp->si_addr << "." << endl
191	<< "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;
192	} // if
193	backtrace( 2 ); // skip first 2 stack frames
194	abort(); // cause core dump for debugging
195	} // sigSegvBusHandler
196
197	static void sigFpeHandler( SIGPARMS ) {
198	const char * msg;
199
200	switch ( sfp->si_code ) {
201	case FPE_INTDIV: case FPE_FLTDIV: msg = "divide by zero"; break;
202	case FPE_FLTOVF: msg = "overflow"; break;
203	case FPE_FLTUND: msg = "underflow"; break;
204	case FPE_FLTRES: msg = "inexact result"; break;
205	case FPE_FLTINV: msg = "invalid operation"; break;
206	default: msg = "unknown";
207	} // choose
208	cerr << "Computation error " << msg << " at location " << sfp->si_addr << endl
209	<< "Possible cause is constant-expression evaluation invalid." << endl;
210	backtrace( 2 ); // skip first 2 stack frames
211	abort(); // cause core dump for debugging
212	} // sigFpeHandler
213
214	static void sigAbortHandler( SIGPARMS ) {
215	backtrace( 6 ); // skip first 6 stack frames
216	Signal( SIGABRT, SIG_DFL, SA_SIGINFO ); // reset default signal handler
217	raise( SIGABRT ); // reraise SIGABRT
218	} // sigAbortHandler
219
220	int main( int argc, char * argv[] ) {
221	FILE * input; // use FILE rather than istream because yyin is FILE
222	ostream * output = & cout;
223	list< Declaration * > translationUnit;
224
225	Signal( SIGSEGV, sigSegvBusHandler, SA_SIGINFO );
226	Signal( SIGBUS, sigSegvBusHandler, SA_SIGINFO );
227	Signal( SIGFPE, sigFpeHandler, SA_SIGINFO );
228	Signal( SIGABRT, sigAbortHandler, SA_SIGINFO );
229
230	// cout << "main" << endl;
231	// for ( int i = 0; i < argc; i += 1 ) {
232	// cout << '\t' << argv[i] << endl;
233	// } // for
234
235	parse_cmdline( argc, argv ); // process command-line arguments
236	CodeGen::FixMain::setReplaceMain( !nomainp );
237
238	if ( waiting_for_gdb ) {
239	cerr << "Waiting for gdb" << endl;
240	cerr << "run :" << endl;
241	cerr << " gdb attach " << getpid() << endl;
242	raise(SIGSTOP);
243	} // if
244
245	try {
246	// choose to read the program from a file or stdin
247	if ( optind < argc ) { // any commands after the flags ? => input file name
248	input = fopen( argv[ optind ], "r" );
249	assertf( input, "cannot open %s because %s\n", argv[ optind ], strerror( errno ) );
250	optind += 1;
251	} else { // no input file name
252	input = stdin;
253	} // if
254
255	Stats::Time::StartGlobal();
256	NewPass("Parse");
257	Stats::Time::StartBlock("Parse");
258
259	// read in the builtins, extras, and the prelude
260	if ( ! nopreludep ) { // include gcc builtins
261	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
262
263	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
264
265	// Read to gcc builtins, if not generating the cfa library
266	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cf").c_str(), "r" );
267	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
268	parse( gcc_builtins, LinkageSpec::Compiler );
269
270	// read the extra prelude in, if not generating the cfa library
271	FILE * extras = fopen( (PreludeDirector + "/extras.cf").c_str(), "r" );
272	assertf( extras, "cannot open extras.cf\n" );
273	parse( extras, LinkageSpec::BuiltinC );
274
275	if ( ! libcfap ) {
276	// read the prelude in, if not generating the cfa library
277	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
278	assertf( prelude, "cannot open prelude.cfa\n" );
279	parse( prelude, LinkageSpec::Intrinsic );
280
281	// Read to cfa builtins, if not generating the cfa library
282	FILE * builtins = fopen( (PreludeDirector + "/builtins.cf").c_str(), "r" );
283	assertf( builtins, "cannot open builtins.cf\n" );
284	parse( builtins, LinkageSpec::BuiltinCFA );
285	} // if
286	} // if
287
288	parse( input, libcfap ? LinkageSpec::Intrinsic : LinkageSpec::Cforall, yydebug );
289
290	if ( parsep ) {
291	parseTree->printList( cout );
292	delete parseTree;
293	return EXIT_SUCCESS;
294	} // if
295
296	buildList( parseTree, translationUnit );
297	delete parseTree;
298	parseTree = nullptr;
299
300	if ( astp ) {
301	dump( translationUnit );
302	return EXIT_SUCCESS;
303	} // if
304
305	// Temporary: fill locations after parsing so that every node has a location, for early error messages.
306	// Eventually we should pass the locations from the parser to every node, but this quick and dirty solution
307	// works okay for now.
308	CodeTools::fillLocations( translationUnit );
309	Stats::Time::StopBlock();
310
311	PASS( "Translate Exception Declarations", ControlStruct::translateExcept( translationUnit ) );
312	if ( exdeclp ) {
313	dump( translationUnit );
314	return EXIT_SUCCESS;
315	} // if
316
317	// add the assignment statement after the initialization of a type parameter
318	PASS( "Validate", SymTab::validate( translationUnit, symtabp ) );
319	if ( symtabp ) {
320	deleteAll( translationUnit );
321	return EXIT_SUCCESS;
322	} // if
323
324	if ( expraltp ) {
325	PassVisitor<ResolvExpr::AlternativePrinter> printer( cout );
326	acceptAll( translationUnit, printer );
327	return EXIT_SUCCESS;
328	} // if
329
330	if ( validp ) {
331	dump( translationUnit );
332	return EXIT_SUCCESS;
333	} // if
334
335	PASS( "Translate Throws", ControlStruct::translateThrows( translationUnit ) );
336	PASS( "Fix Labels", ControlStruct::fixLabels( translationUnit ) );
337
338	CodeTools::fillLocations( translationUnit );
339
340	if( useNewAST ) {
341	if (Stats::Counters::enabled) {
342	ast::pass_visitor_stats.avg = Stats::Counters::build<Stats::Counters::AverageCounter<double>>("Average Depth - New");
343	ast::pass_visitor_stats.max = Stats::Counters::build<Stats::Counters::MaxCounter<double>>("Max depth - New");
344	}
345	auto transUnit = convert( move( translationUnit ) );
346
347	forceFillCodeLocations( transUnit );
348
349	PASS( "Fix Names", CodeGen::fixNames( transUnit ) );
350	PASS( "Gen Init", InitTweak::genInit( transUnit ) );
351	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( transUnit ) );
352
353	if ( libcfap ) {
354	// Generate the bodies of cfa library functions.
355	LibCfa::makeLibCfa( transUnit );
356	} // if
357
358	if ( declstatsp ) {
359	printDeclStats( transUnit );
360	return EXIT_SUCCESS;
361	} // if
362
363	if ( bresolvep ) {
364	dump( move( transUnit ) );
365	return EXIT_SUCCESS;
366	} // if
367
368	if ( resolvprotop ) {
369	dumpAsResolverProto( transUnit );
370	return EXIT_SUCCESS;
371	} // if
372
373	PASS( "Resolve", ResolvExpr::resolve( transUnit ) );
374	if ( exprp ) {
375	dump( move( transUnit ) );
376	return EXIT_SUCCESS;
377	} // if
378
379	forceFillCodeLocations( transUnit );
380
381	PASS( "Fix Init", InitTweak::fix(transUnit, buildingLibrary()));
382
383	translationUnit = convert( move( transUnit ) );
384	} else {
385	PASS( "Fix Names", CodeGen::fixNames( translationUnit ) );
386	PASS( "Gen Init", InitTweak::genInit( translationUnit ) );
387	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( translationUnit ) );
388
389	if ( libcfap ) {
390	// Generate the bodies of cfa library functions.
391	LibCfa::makeLibCfa( translationUnit );
392	} // if
393
394	if ( declstatsp ) {
395	CodeTools::printDeclStats( translationUnit );
396	deleteAll( translationUnit );
397	return EXIT_SUCCESS;
398	} // if
399
400	if ( bresolvep ) {
401	dump( translationUnit );
402	return EXIT_SUCCESS;
403	} // if
404
405	CodeTools::fillLocations( translationUnit );
406
407	if ( resolvprotop ) {
408	CodeTools::dumpAsResolvProto( translationUnit );
409	return EXIT_SUCCESS;
410	} // if
411
412	PASS( "Resolve", ResolvExpr::resolve( translationUnit ) );
413	if ( exprp ) {
414	dump( translationUnit );
415	return EXIT_SUCCESS;
416	}
417
418	PASS( "Fix Init", InitTweak::fix( translationUnit, buildingLibrary() ) );
419	}
420
421	// fix ObjectDecl - replaces ConstructorInit nodes
422	if ( ctorinitp ) {
423	dump ( translationUnit );
424	return EXIT_SUCCESS;
425	} // if
426
427	PASS( "Expand Unique Expr", Tuples::expandUniqueExpr( translationUnit ) ); // xxx - is this the right place for this? want to expand ASAP so tha, sequent passes don't need to worry about double-visiting a unique expr - needs to go after InitTweak::fix so that copy constructed return declarations are reused
428
429	PASS( "Translate Tries" , ControlStruct::translateTries( translationUnit ) );
430
431	PASS( "Gen Waitfor" , Concurrency::generateWaitFor( translationUnit ) );
432
433	PASS( "Convert Specializations", GenPoly::convertSpecializations( translationUnit ) ); // needs to happen before tuple types are expanded
434
435	PASS( "Expand Tuples", Tuples::expandTuples( translationUnit ) ); // xxx - is this the right place for this?
436
437	if ( tuplep ) {
438	dump( translationUnit );
439	return EXIT_SUCCESS;
440	} // if
441
442	PASS( "Virtual Expand Casts", Virtual::expandCasts( translationUnit ) ); // Must come after translateEHM
443
444	PASS( "Instantiate Generics", GenPoly::instantiateGeneric( translationUnit ) );
445	if ( genericsp ) {
446	dump( translationUnit );
447	return EXIT_SUCCESS;
448	} // if
449
450	PASS( "Convert L-Value", GenPoly::convertLvalue( translationUnit ) );
451
452	if ( bboxp ) {
453	dump( translationUnit );
454	return EXIT_SUCCESS;
455	} // if
456	PASS( "Box", GenPoly::box( translationUnit ) );
457
458	PASS( "Link-Once", CodeGen::translateLinkOnce( translationUnit ) );
459
460	// Code has been lowered to C, now we can start generation.
461
462	if ( bcodegenp ) {
463	dump( translationUnit );
464	return EXIT_SUCCESS;
465	} // if
466
467	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
468	output = new ofstream( argv[ optind ] );
469	} // if
470
471	CodeTools::fillLocations( translationUnit );
472	PASS( "Code Gen", CodeGen::generate( translationUnit, *output, ! genproto, prettycodegenp, true, linemarks ) );
473
474	CodeGen::FixMain::fix( translationUnit, *output,
475	(PreludeDirector + "/bootloader.c").c_str() );
476	if ( output != &cout ) {
477	delete output;
478	} // if
479	} catch ( SemanticErrorException & e ) {
480	if ( errorp ) {
481	cerr << "---AST at error:---" << endl;
482	dump( translationUnit, cerr );
483	cerr << endl << "---End of AST, begin error message:---\n" << endl;
484	} // if
485	e.print();
486	if ( output != &cout ) {
487	delete output;
488	} // if
489	return EXIT_FAILURE;
490	} catch ( UnimplementedError & e ) {
491	cout << "Sorry, " << e.get_what() << " is not currently implemented" << endl;
492	if ( output != &cout ) {
493	delete output;
494	} // if
495	return EXIT_FAILURE;
496	} catch ( CompilerError & e ) {
497	cerr << "Compiler Error: " << e.get_what() << endl;
498	cerr << "(please report bugs to [REDACTED])" << endl;
499	if ( output != &cout ) {
500	delete output;
501	} // if
502	return EXIT_FAILURE;
503	} catch ( std::bad_alloc & ) {
504	cerr << "cfa-cpp compilation error std::bad_alloc" << endl;
505	backtrace( 1 );
506	abort();
507	} catch ( ... ) {
508	exception_ptr eptr = current_exception();
509	try {
510	if (eptr) {
511	rethrow_exception(eptr);
512	} else {
513	cerr << "cfa-cpp compilation error exception uncaught and unknown" << endl;
514	} // if
515	} catch( const exception & e ) {
516	cerr << "cfa-cpp compilation error uncaught exception \"" << e.what() << "\"\n";
517	} // try
518	return EXIT_FAILURE;
519	} // try
520
521	deleteAll( translationUnit );
522	Stats::print();
523	return EXIT_SUCCESS;
524	} // main
525
526
527	static const char optstring[] = ":c:ghlLmNnpdOAP:S:twW:D:";
528
529	enum { PreludeDir = 128 };
530	static struct option long_opts[] = {
531	{ "colors", required_argument, nullptr, 'c' },
532	{ "gdb", no_argument, nullptr, 'g' },
533	{ "help", no_argument, nullptr, 'h' },
534	{ "libcfa", no_argument, nullptr, 'l' },
535	{ "linemarks", no_argument, nullptr, 'L' },
536	{ "no-main", no_argument, 0, 'm' },
537	{ "no-linemarks", no_argument, nullptr, 'N' },
538	{ "no-prelude", no_argument, nullptr, 'n' },
539	{ "prototypes", no_argument, nullptr, 'p' },
540	{ "deterministic-out", no_argument, nullptr, 'd' },
541	{ "old-ast", no_argument, nullptr, 'O'},
542	{ "new-ast", no_argument, nullptr, 'A'},
543	{ "print", required_argument, nullptr, 'P' },
544	{ "prelude-dir", required_argument, nullptr, PreludeDir },
545	{ "statistics", required_argument, nullptr, 'S' },
546	{ "tree", no_argument, nullptr, 't' },
547	{ "", no_argument, nullptr, 0 }, // -w
548	{ "", no_argument, nullptr, 0 }, // -W
549	{ "", no_argument, nullptr, 0 }, // -D
550	{ nullptr, 0, nullptr, 0 }
551	}; // long_opts
552
553	static const char * description[] = {
554	"diagnostic color: never, always, auto", // -c
555	"wait for gdb to attach", // -g
556	"print translator help message", // -h
557	"generate libcfa.c", // -l
558	"generate line marks", // -L
559	"do not replace main", // -m
560	"do not generate line marks", // -N
561	"do not read prelude", // -n
562	"do not generate prelude prototypes => prelude not printed", // -p
563	"only print deterministic output", // -d
564	"Use the old-ast", // -O
565	"Use the new-ast", // -A
566	"print", // -P
567	"<directory> prelude directory for debug/nodebug", // no flag
568	"<option-list> enable profiling information: counters, heap, time, all, none", // -S
569	"building cfa standard lib", // -t
570	"", // -w
571	"", // -W
572	"", // -D
573	}; // description
574
575	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
576
577	static struct Printopts {
578	const char * name;
579	int & flag;
580	int val;
581	const char * descript;
582	} printopts[] = {
583	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
584	{ "asterr", errorp, true, "print AST on error" },
585	{ "declstats", declstatsp, true, "code property statistics" },
586	{ "parse", yydebug, true, "yacc (parsing) debug information" },
587	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
588	{ "rproto", resolvprotop, true, "resolver-proto instance" },
589	{ "rsteps", resolvep, true, "print resolver steps" },
590	{ "tree", parsep, true, "print parse tree" },
591	// code dumps
592	{ "ast", astp, true, "print AST after parsing" },
593	{ "exdecl", exdeclp, true, "print AST after translating exception decls" },
594	{ "symevt", symtabp, true, "print AST after symbol table events" },
595	{ "altexpr", expraltp, true, "print alternatives for expressions" },
596	{ "astdecl", validp, true, "print AST after declaration validation pass" },
597	{ "resolver", bresolvep, true, "print AST before resolver step" },
598	{ "astexpr", exprp, true, "print AST after expression analysis" },
599	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
600	{ "tuple", tuplep, true, "print AST after tuple expansion" },
601	{ "astgen", genericsp, true, "print AST after instantiate generics" },
602	{ "box", bboxp, true, "print AST before box step" },
603	{ "codegen", bcodegenp, true, "print AST before code generation" },
604	};
605	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
606
607	static void usage( char * argv[] ) {
608	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
609	int i = 0, j = 1; // j skips starting colon
610	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
611	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
612	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
613	cout << " -" << optstring[j] << ",";
614	} else { // no flag
615	j -= 1; // compensate
616	cout << " ";
617	} // if
618	cout << " --" << left << setw(12) << long_opts[i].name << " ";
619	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
620	cout << "one of: " << endl;
621	for ( int i = 0; i < printoptsSize; i += 1 ) {
622	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
623	} // for
624	} else {
625	cout << description[i] << endl;
626	} // if
627	} // if
628	if ( optstring[j + 1] == ':' ) j += 1;
629	} // for
630	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
631	exit( EXIT_FAILURE );
632	} // usage
633
634	static void parse_cmdline( int argc, char * argv[] ) {
635	opterr = 0; // (global) prevent getopt from printing error messages
636
637	bool Wsuppress = false, Werror = false;
638	int c;
639	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
640	switch ( c ) {
641	case 'c': // diagnostic colors
642	if ( strcmp( optarg, "always" ) == 0 ) {
643	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
644	} else if ( strcmp( optarg, "never" ) == 0 ) {
645	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
646	} else if ( strcmp( optarg, "auto" ) == 0 ) {
647	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
648	} // if
649	break;
650	case 'h': // help message
651	usage( argv ); // no return
652	break;
653	case 'l': // generate libcfa.c
654	libcfap = true;
655	break;
656	case 'L': // generate line marks
657	linemarks = true;
658	break;
659	case 'm': // do not replace main
660	nomainp = true;
661	break;
662	case 'N': // do not generate line marks
663	linemarks = false;
664	break;
665	case 'n': // do not read prelude
666	nopreludep = true;
667	break;
668	case 'p': // generate prototypes for prelude functions
669	genproto = true;
670	break;
671	case 'd': // don't print non-deterministic output
672	deterministic_output = true;
673	break;
674	case 'O': // don't print non-deterministic output
675	useNewAST = false;
676	break;
677	case 'A': // don't print non-deterministic output
678	useNewAST = true;
679	break;
680	case 'P': // print options
681	for ( int i = 0;; i += 1 ) {
682	if ( i == printoptsSize ) {
683	cout << "Unknown --print option " << optarg << endl;
684	goto Default;
685	} // if
686	if ( strcmp( optarg, printopts[i].name ) == 0 ) {
687	printopts[i].flag = printopts[i].val;
688	break;
689	} // if
690	} // for
691	break;
692	case PreludeDir: // prelude directory for debug/nodebug, hidden
693	PreludeDirector = optarg;
694	break;
695	case 'S': // enable profiling information, argument comma separated list of names
696	Stats::parse_params( optarg );
697	break;
698	case 't': // building cfa stdlib
699	treep = true;
700	break;
701	case 'g': // wait for gdb
702	waiting_for_gdb = true;
703	break;
704	case 'w': // suppress all warnings, hidden
705	Wsuppress = true;
706	break;
707	case 'W': // coordinate gcc -W with CFA, hidden
708	if ( strcmp( optarg, "all" ) == 0 ) {
709	SemanticWarning_EnableAll();
710	} else if ( strcmp( optarg, "error" ) == 0 ) {
711	Werror = true;
712	} else {
713	char * warning = optarg;
714	Severity s;
715	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
716	warning += 3;
717	s = Severity::Suppress;
718	} else {
719	s = Severity::Warn;
720	} // if
721	SemanticWarning_Set( warning, s );
722	} // if
723	break;
724	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
725	break;
726	case '?': // unknown option
727	if ( optopt ) { // short option ?
728	cout << "Unknown option -" << (char)optopt << endl;
729	} else {
730	cout << "Unknown option " << argv[optind - 1] << endl;
731	} // if
732	goto Default;
733	case ':': // missing option
734	if ( optopt ) { // short option ?
735	cout << "Missing option for -" << (char)optopt << endl;
736	} else {
737	cout << "Missing option for " << argv[optind - 1] << endl;
738	} // if
739	goto Default;
740	Default:
741	default:
742	usage( argv ); // no return
743	} // switch
744	} // while
745
746	if ( Werror ) {
747	SemanticWarning_WarningAsError();
748	} // if
749	if ( Wsuppress ) {
750	SemanticWarning_SuppressAll();
751	} // if
752	// for ( const auto w : WarningFormats ) {
753	// cout << w.name << ' ' << (int)w.severity << endl;
754	// } // for
755	} // parse_cmdline
756
757	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit ) {
758	extern int yyparse( void );
759	extern FILE * yyin;
760	extern int yylineno;
761
762	::linkage = linkage; // set globals
763	yyin = input;
764	yylineno = 1;
765	int parseStatus = yyparse();
766
767	fclose( input );
768	if ( shouldExit \|\| parseStatus != 0 ) {
769	exit( parseStatus );
770	} // if
771	} // parse
772
773	static bool notPrelude( Declaration * decl ) {
774	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
775	} // notPrelude
776
777	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
778	list< Declaration * > decls;
779
780	if ( genproto ) {
781	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
782	} else {
783	decls = translationUnit;
784	} // if
785
786	// depending on commandline options, either generate code or dump the AST
787	if ( codegenp ) {
788	CodeGen::generate( decls, out, ! genproto, prettycodegenp );
789	} else {
790	printAll( decls, out );
791	} // if
792	deleteAll( translationUnit );
793	} // dump
794
795	static void dump( ast::TranslationUnit && transUnit, ostream & out ) {
796	std::list< Declaration * > translationUnit = convert( move( transUnit ) );
797	dump( translationUnit, out );
798	}
799
800	// Local Variables: //
801	// tab-width: 4 //
802	// mode: c++ //
803	// compile-command: "make install" //
804	// End: //

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