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source: src/main.cc @ 148ba7d

ADTast-experimentalenumforall-pointer-decaypthread-emulationqualifiedEnum

Last change on this file since 148ba7d was a36eb2d, checked in by Andrew Beach <ajbeach@…>, 3 years ago
First translation of the Gen Init pass. Passed the tests.
Property mode set to `100644`
File size: 28.3 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 22 16:06:00 2021
13	// Update Count : 653
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	PASS( "Fix Names", CodeGen::fixNames( translationUnit ) );
338
339	CodeTools::fillLocations( translationUnit );
340
341	if( useNewAST ) {
342	if (Stats::Counters::enabled) {
343	ast::pass_visitor_stats.avg = Stats::Counters::build<Stats::Counters::AverageCounter<double>>("Average Depth - New");
344	ast::pass_visitor_stats.max = Stats::Counters::build<Stats::Counters::MaxCounter<double>>("Max depth - New");
345	}
346	auto transUnit = convert( move( translationUnit ) );
347
348	forceFillCodeLocations( transUnit );
349
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( "Gen Init", InitTweak::genInit( translationUnit ) );
386	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( translationUnit ) );
387
388	if ( libcfap ) {
389	// Generate the bodies of cfa library functions.
390	LibCfa::makeLibCfa( translationUnit );
391	} // if
392
393	if ( declstatsp ) {
394	CodeTools::printDeclStats( translationUnit );
395	deleteAll( translationUnit );
396	return EXIT_SUCCESS;
397	} // if
398
399	if ( bresolvep ) {
400	dump( translationUnit );
401	return EXIT_SUCCESS;
402	} // if
403
404	CodeTools::fillLocations( translationUnit );
405
406	if ( resolvprotop ) {
407	CodeTools::dumpAsResolvProto( translationUnit );
408	return EXIT_SUCCESS;
409	} // if
410
411	PASS( "Resolve", ResolvExpr::resolve( translationUnit ) );
412	if ( exprp ) {
413	dump( translationUnit );
414	return EXIT_SUCCESS;
415	}
416
417	PASS( "Fix Init", InitTweak::fix( translationUnit, buildingLibrary() ) );
418	}
419
420	// fix ObjectDecl - replaces ConstructorInit nodes
421	if ( ctorinitp ) {
422	dump ( translationUnit );
423	return EXIT_SUCCESS;
424	} // if
425
426	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
427
428	PASS( "Translate Tries" , ControlStruct::translateTries( translationUnit ) );
429
430	PASS( "Gen Waitfor" , Concurrency::generateWaitFor( translationUnit ) );
431
432	PASS( "Convert Specializations", GenPoly::convertSpecializations( translationUnit ) ); // needs to happen before tuple types are expanded
433
434	PASS( "Expand Tuples", Tuples::expandTuples( translationUnit ) ); // xxx - is this the right place for this?
435
436	if ( tuplep ) {
437	dump( translationUnit );
438	return EXIT_SUCCESS;
439	} // if
440
441	PASS( "Virtual Expand Casts", Virtual::expandCasts( translationUnit ) ); // Must come after translateEHM
442
443	PASS( "Instantiate Generics", GenPoly::instantiateGeneric( translationUnit ) );
444	if ( genericsp ) {
445	dump( translationUnit );
446	return EXIT_SUCCESS;
447	} // if
448
449	PASS( "Convert L-Value", GenPoly::convertLvalue( translationUnit ) );
450
451	if ( bboxp ) {
452	dump( translationUnit );
453	return EXIT_SUCCESS;
454	} // if
455	PASS( "Box", GenPoly::box( translationUnit ) );
456
457	PASS( "Link-Once", CodeGen::translateLinkOnce( translationUnit ) );
458
459	// Code has been lowered to C, now we can start generation.
460
461	if ( bcodegenp ) {
462	dump( translationUnit );
463	return EXIT_SUCCESS;
464	} // if
465
466	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
467	output = new ofstream( argv[ optind ] );
468	} // if
469
470	CodeTools::fillLocations( translationUnit );
471	PASS( "Code Gen", CodeGen::generate( translationUnit, *output, ! genproto, prettycodegenp, true, linemarks ) );
472
473	CodeGen::FixMain::fix( *output, (PreludeDirector + "/bootloader.c").c_str() );
474	if ( output != &cout ) {
475	delete output;
476	} // if
477	} catch ( SemanticErrorException & e ) {
478	if ( errorp ) {
479	cerr << "---AST at error:---" << endl;
480	dump( translationUnit, cerr );
481	cerr << endl << "---End of AST, begin error message:---\n" << endl;
482	} // if
483	e.print();
484	if ( output != &cout ) {
485	delete output;
486	} // if
487	return EXIT_FAILURE;
488	} catch ( UnimplementedError & e ) {
489	cout << "Sorry, " << e.get_what() << " is not currently implemented" << endl;
490	if ( output != &cout ) {
491	delete output;
492	} // if
493	return EXIT_FAILURE;
494	} catch ( CompilerError & e ) {
495	cerr << "Compiler Error: " << e.get_what() << endl;
496	cerr << "(please report bugs to [REDACTED])" << endl;
497	if ( output != &cout ) {
498	delete output;
499	} // if
500	return EXIT_FAILURE;
501	} catch ( std::bad_alloc & ) {
502	cerr << "cfa-cpp compilation error std::bad_alloc" << endl;
503	backtrace( 1 );
504	abort();
505	} catch ( ... ) {
506	exception_ptr eptr = current_exception();
507	try {
508	if (eptr) {
509	rethrow_exception(eptr);
510	} else {
511	cerr << "cfa-cpp compilation error exception uncaught and unknown" << endl;
512	} // if
513	} catch( const exception & e ) {
514	cerr << "cfa-cpp compilation error uncaught exception \"" << e.what() << "\"\n";
515	} // try
516	return EXIT_FAILURE;
517	} // try
518
519	deleteAll( translationUnit );
520	Stats::print();
521	return EXIT_SUCCESS;
522	} // main
523
524
525	static const char optstring[] = ":c:ghlLmNnpdOAP:S:twW:D:";
526
527	enum { PreludeDir = 128 };
528	static struct option long_opts[] = {
529	{ "colors", required_argument, nullptr, 'c' },
530	{ "gdb", no_argument, nullptr, 'g' },
531	{ "help", no_argument, nullptr, 'h' },
532	{ "libcfa", no_argument, nullptr, 'l' },
533	{ "linemarks", no_argument, nullptr, 'L' },
534	{ "no-main", no_argument, 0, 'm' },
535	{ "no-linemarks", no_argument, nullptr, 'N' },
536	{ "no-prelude", no_argument, nullptr, 'n' },
537	{ "prototypes", no_argument, nullptr, 'p' },
538	{ "deterministic-out", no_argument, nullptr, 'd' },
539	{ "old-ast", no_argument, nullptr, 'O'},
540	{ "new-ast", no_argument, nullptr, 'A'},
541	{ "print", required_argument, nullptr, 'P' },
542	{ "prelude-dir", required_argument, nullptr, PreludeDir },
543	{ "statistics", required_argument, nullptr, 'S' },
544	{ "tree", no_argument, nullptr, 't' },
545	{ "", no_argument, nullptr, 0 }, // -w
546	{ "", no_argument, nullptr, 0 }, // -W
547	{ "", no_argument, nullptr, 0 }, // -D
548	{ nullptr, 0, nullptr, 0 }
549	}; // long_opts
550
551	static const char * description[] = {
552	"diagnostic color: never, always, auto", // -c
553	"wait for gdb to attach", // -g
554	"print translator help message", // -h
555	"generate libcfa.c", // -l
556	"generate line marks", // -L
557	"do not replace main", // -m
558	"do not generate line marks", // -N
559	"do not read prelude", // -n
560	"do not generate prelude prototypes => prelude not printed", // -p
561	"only print deterministic output", // -d
562	"Use the old-ast", // -O
563	"Use the new-ast", // -A
564	"print", // -P
565	"<directory> prelude directory for debug/nodebug", // no flag
566	"<option-list> enable profiling information: counters, heap, time, all, none", // -S
567	"building cfa standard lib", // -t
568	"", // -w
569	"", // -W
570	"", // -D
571	}; // description
572
573	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
574
575	static struct Printopts {
576	const char * name;
577	int & flag;
578	int val;
579	const char * descript;
580	} printopts[] = {
581	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
582	{ "asterr", errorp, true, "print AST on error" },
583	{ "declstats", declstatsp, true, "code property statistics" },
584	{ "parse", yydebug, true, "yacc (parsing) debug information" },
585	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
586	{ "rproto", resolvprotop, true, "resolver-proto instance" },
587	{ "rsteps", resolvep, true, "print resolver steps" },
588	{ "tree", parsep, true, "print parse tree" },
589	// code dumps
590	{ "ast", astp, true, "print AST after parsing" },
591	{ "exdecl", exdeclp, true, "print AST after translating exception decls" },
592	{ "symevt", symtabp, true, "print AST after symbol table events" },
593	{ "altexpr", expraltp, true, "print alternatives for expressions" },
594	{ "astdecl", validp, true, "print AST after declaration validation pass" },
595	{ "resolver", bresolvep, true, "print AST before resolver step" },
596	{ "astexpr", exprp, true, "print AST after expression analysis" },
597	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
598	{ "tuple", tuplep, true, "print AST after tuple expansion" },
599	{ "astgen", genericsp, true, "print AST after instantiate generics" },
600	{ "box", bboxp, true, "print AST before box step" },
601	{ "codegen", bcodegenp, true, "print AST before code generation" },
602	};
603	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
604
605	static void usage( char * argv[] ) {
606	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
607	int i = 0, j = 1; // j skips starting colon
608	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
609	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
610	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
611	cout << " -" << optstring[j] << ",";
612	} else { // no flag
613	j -= 1; // compensate
614	cout << " ";
615	} // if
616	cout << " --" << left << setw(12) << long_opts[i].name << " ";
617	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
618	cout << "one of: " << endl;
619	for ( int i = 0; i < printoptsSize; i += 1 ) {
620	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
621	} // for
622	} else {
623	cout << description[i] << endl;
624	} // if
625	} // if
626	if ( optstring[j + 1] == ':' ) j += 1;
627	} // for
628	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
629	exit( EXIT_FAILURE );
630	} // usage
631
632	static void parse_cmdline( int argc, char * argv[] ) {
633	opterr = 0; // (global) prevent getopt from printing error messages
634
635	bool Wsuppress = false, Werror = false;
636	int c;
637	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
638	switch ( c ) {
639	case 'c': // diagnostic colors
640	if ( strcmp( optarg, "always" ) == 0 ) {
641	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
642	} else if ( strcmp( optarg, "never" ) == 0 ) {
643	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
644	} else if ( strcmp( optarg, "auto" ) == 0 ) {
645	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
646	} // if
647	break;
648	case 'h': // help message
649	usage( argv ); // no return
650	break;
651	case 'l': // generate libcfa.c
652	libcfap = true;
653	break;
654	case 'L': // generate line marks
655	linemarks = true;
656	break;
657	case 'm': // do not replace main
658	nomainp = true;
659	break;
660	case 'N': // do not generate line marks
661	linemarks = false;
662	break;
663	case 'n': // do not read prelude
664	nopreludep = true;
665	break;
666	case 'p': // generate prototypes for prelude functions
667	genproto = true;
668	break;
669	case 'd': // don't print non-deterministic output
670	deterministic_output = true;
671	break;
672	case 'O': // don't print non-deterministic output
673	useNewAST = false;
674	break;
675	case 'A': // don't print non-deterministic output
676	useNewAST = true;
677	break;
678	case 'P': // print options
679	for ( int i = 0;; i += 1 ) {
680	if ( i == printoptsSize ) {
681	cout << "Unknown --print option " << optarg << endl;
682	goto Default;
683	} // if
684	if ( strcmp( optarg, printopts[i].name ) == 0 ) {
685	printopts[i].flag = printopts[i].val;
686	break;
687	} // if
688	} // for
689	break;
690	case PreludeDir: // prelude directory for debug/nodebug, hidden
691	PreludeDirector = optarg;
692	break;
693	case 'S': // enable profiling information, argument comma separated list of names
694	Stats::parse_params( optarg );
695	break;
696	case 't': // building cfa stdlib
697	treep = true;
698	break;
699	case 'g': // wait for gdb
700	waiting_for_gdb = true;
701	break;
702	case 'w': // suppress all warnings, hidden
703	Wsuppress = true;
704	break;
705	case 'W': // coordinate gcc -W with CFA, hidden
706	if ( strcmp( optarg, "all" ) == 0 ) {
707	SemanticWarning_EnableAll();
708	} else if ( strcmp( optarg, "error" ) == 0 ) {
709	Werror = true;
710	} else {
711	char * warning = optarg;
712	Severity s;
713	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
714	warning += 3;
715	s = Severity::Suppress;
716	} else {
717	s = Severity::Warn;
718	} // if
719	SemanticWarning_Set( warning, s );
720	} // if
721	break;
722	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
723	break;
724	case '?': // unknown option
725	if ( optopt ) { // short option ?
726	cout << "Unknown option -" << (char)optopt << endl;
727	} else {
728	cout << "Unknown option " << argv[optind - 1] << endl;
729	} // if
730	goto Default;
731	case ':': // missing option
732	if ( optopt ) { // short option ?
733	cout << "Missing option for -" << (char)optopt << endl;
734	} else {
735	cout << "Missing option for " << argv[optind - 1] << endl;
736	} // if
737	goto Default;
738	Default:
739	default:
740	usage( argv ); // no return
741	} // switch
742	} // while
743
744	if ( Werror ) {
745	SemanticWarning_WarningAsError();
746	} // if
747	if ( Wsuppress ) {
748	SemanticWarning_SuppressAll();
749	} // if
750	// for ( const auto w : WarningFormats ) {
751	// cout << w.name << ' ' << (int)w.severity << endl;
752	// } // for
753	} // parse_cmdline
754
755	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit ) {
756	extern int yyparse( void );
757	extern FILE * yyin;
758	extern int yylineno;
759
760	::linkage = linkage; // set globals
761	yyin = input;
762	yylineno = 1;
763	int parseStatus = yyparse();
764
765	fclose( input );
766	if ( shouldExit \|\| parseStatus != 0 ) {
767	exit( parseStatus );
768	} // if
769	} // parse
770
771	static bool notPrelude( Declaration * decl ) {
772	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
773	} // notPrelude
774
775	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
776	list< Declaration * > decls;
777
778	if ( genproto ) {
779	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
780	} else {
781	decls = translationUnit;
782	} // if
783
784	// depending on commandline options, either generate code or dump the AST
785	if ( codegenp ) {
786	CodeGen::generate( decls, out, ! genproto, prettycodegenp );
787	} else {
788	printAll( decls, out );
789	} // if
790	deleteAll( translationUnit );
791	} // dump
792
793	static void dump( ast::TranslationUnit && transUnit, ostream & out ) {
794	std::list< Declaration * > translationUnit = convert( move( transUnit ) );
795	dump( translationUnit, out );
796	}
797
798	// Local Variables: //
799	// tab-width: 4 //
800	// mode: c++ //
801	// compile-command: "make install" //
802	// End: //

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