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source: src/main.cc @ d249e0b

ADTast-experimentalenumforall-pointer-decayjacob/cs343-translationpthread-emulationqualifiedEnum

Last change on this file since d249e0b was 00da199, checked in by Henry Xue <y58xue@…>, 3 years ago
Add a switch to print AST after exdecl pass
Property mode set to `100644`
File size: 27.6 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 : Henry Xue
12	// Last Modified On : Tue Jul 20 04:27:35 2021
13	// Update Count : 658
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/Stats.h"
46	#include "Common/PassVisitor.h"
47	#include "Common/SemanticError.h" // for SemanticError
48	#include "Common/UnimplementedError.h" // for UnimplementedError
49	#include "Common/utility.h" // for deleteAll, filter, printAll
50	#include "Concurrency/Waitfor.h" // for generateWaitfor
51	#include "ControlStruct/ExceptDecl.h" // for translateExcept
52	#include "ControlStruct/ExceptTranslate.h" // for translateEHM
53	#include "ControlStruct/Mutate.h" // for mutate
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/ParseNode.h" // for DeclarationNode, buildList
62	#include "Parser/TypedefTable.h" // for TypedefTable
63	#include "ResolvExpr/AlternativePrinter.h" // for AlternativePrinter
64	#include "ResolvExpr/Resolver.h" // for resolve
65	#include "SymTab/Validate.h" // for validate
66	#include "SynTree/LinkageSpec.h" // for Spec, Cforall, Intrinsic
67	#include "SynTree/Declaration.h" // for Declaration
68	#include "SynTree/Visitor.h" // for acceptAll
69	#include "Tuples/Tuples.h" // for expandMemberTuples, expan...
70	#include "Virtual/ExpandCasts.h" // for expandCasts
71
72
73	static void NewPass( const char * const name ) {
74	Stats::Heap::newPass( name );
75	using namespace Stats::Counters;
76	{
77	static auto group = build<CounterGroup>( "Pass Visitor" );
78	auto pass = build<CounterGroup>( name, group );
79	pass_visitor_stats.depth = 0;
80	pass_visitor_stats.avg = build<AverageCounter<double>>( "Average Depth", pass );
81	pass_visitor_stats.max = build<MaxCounter<double>>( "Max Depth", pass );
82	}
83	{
84	static auto group = build<CounterGroup>( "Syntax Node" );
85	auto pass = build<CounterGroup>( name, group );
86	BaseSyntaxNode::new_nodes = build<SimpleCounter>( "Allocs", pass );
87	}
88	}
89
90	#define PASS( name, pass ) \
91	if ( errorp ) { cerr << name << endl; } \
92	NewPass(name); \
93	Stats::Time::StartBlock(name); \
94	pass; \
95	Stats::Time::StopBlock();
96
97	LinkageSpec::Spec linkage = LinkageSpec::Cforall;
98	TypedefTable typedefTable;
99	DeclarationNode * parseTree = nullptr; // program parse tree
100
101	static bool waiting_for_gdb = false; // flag to set cfa-cpp to wait for gdb on start
102
103	static string PreludeDirector = "";
104
105	static void parse_cmdline( int argc, char * argv[] );
106	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit = false );
107	static void dump( list< Declaration * > & translationUnit, ostream & out = cout );
108	static void dump( ast::TranslationUnit && transUnit, ostream & out = cout );
109
110	static void backtrace( int start ) { // skip first N stack frames
111	enum { Frames = 50, }; // maximum number of stack frames
112	void * array[Frames];
113	size_t size = ::backtrace( array, Frames );
114	char ** messages = ::backtrace_symbols( array, size ); // does not demangle names
115
116	*index( messages[0], '(' ) = '\0'; // find executable name
117	cerr << "Stack back trace for: " << messages[0] << endl;
118
119	// skip last 2 stack frames after main
120	for ( unsigned int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
121	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
122
123	for ( char * p = messages[i]; *p; p += 1 ) { // find parantheses and +offset
124	if ( *p == '(' ) {
125	mangled_name = p;
126	} else if ( *p == '+' ) {
127	offset_begin = p;
128	} else if ( *p == ')' ) {
129	offset_end = p;
130	break;
131	} // if
132	} // for
133
134	// if line contains symbol, attempt to demangle
135	int frameNo = i - start;
136	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
137	*mangled_name++ = '\0'; // delimit strings
138	*offset_begin++ = '\0';
139	*offset_end++ = '\0';
140
141	int status;
142	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
143	// bug in __cxa_demangle for single-character lower-case non-mangled names
144	if ( status == 0 ) { // demangling successful ?
145	cerr << "(" << frameNo << ") " << messages[i] << " : "
146	<< real_name << "+" << offset_begin << offset_end << endl;
147	} else { // otherwise, output mangled name
148	cerr << "(" << frameNo << ") " << messages[i] << " : "
149	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
150	} // if
151
152	free( real_name );
153	} else { // otherwise, print the whole line
154	cerr << "(" << frameNo << ") " << messages[i] << endl;
155	} // if
156	} // for
157
158	free( messages );
159	} // backtrace
160
161	#define SIGPARMS int sig __attribute__(( unused )), siginfo_t * sfp __attribute__(( unused )), ucontext_t * cxt __attribute__(( unused ))
162
163	static void _Signal(struct sigaction & act, int sig, int flags ) {
164	act.sa_flags = flags;
165
166	if ( sigaction( sig, &act, nullptr ) == -1 ) {
167	cerr << "cfa-cpp compilation error problem installing signal handler, error(" << errno << ") " << strerror( errno ) << endl;
168	_exit( EXIT_FAILURE );
169	} // if
170	}
171
172	static void Signal( int sig, void (* handler)(SIGPARMS), int flags ) {
173	struct sigaction act;
174	act.sa_sigaction = (void ()(int, siginfo_t , void *))handler;
175	_Signal(act, sig, flags);
176	} // Signal
177
178	static void Signal( int sig, void (* handler)(int), int flags ) {
179	struct sigaction act;
180	act.sa_handler = handler;
181	_Signal(act, sig, flags);
182	} // Signal
183
184	static void sigSegvBusHandler( SIGPARMS ) {
185	if ( sfp->si_addr == nullptr ) {
186	cerr << "Null pointer (nullptr) dereference." << endl;
187	} else {
188	cerr << (sig == SIGSEGV ? "Segment fault" : "Bus error") << " at memory location " << sfp->si_addr << "." << endl
189	<< "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;
190	} // if
191	backtrace( 2 ); // skip first 2 stack frames
192	abort(); // cause core dump for debugging
193	} // sigSegvBusHandler
194
195	static void sigFpeHandler( SIGPARMS ) {
196	const char * msg;
197
198	switch ( sfp->si_code ) {
199	case FPE_INTDIV: case FPE_FLTDIV: msg = "divide by zero"; break;
200	case FPE_FLTOVF: msg = "overflow"; break;
201	case FPE_FLTUND: msg = "underflow"; break;
202	case FPE_FLTRES: msg = "inexact result"; break;
203	case FPE_FLTINV: msg = "invalid operation"; break;
204	default: msg = "unknown";
205	} // choose
206	cerr << "Computation error " << msg << " at location " << sfp->si_addr << endl
207	<< "Possible cause is constant-expression evaluation invalid." << endl;
208	backtrace( 2 ); // skip first 2 stack frames
209	abort(); // cause core dump for debugging
210	} // sigFpeHandler
211
212	static void sigAbortHandler( SIGPARMS ) {
213	backtrace( 6 ); // skip first 6 stack frames
214	Signal( SIGABRT, SIG_DFL, SA_SIGINFO ); // reset default signal handler
215	raise( SIGABRT ); // reraise SIGABRT
216	} // sigAbortHandler
217
218	int main( int argc, char * argv[] ) {
219	FILE * input; // use FILE rather than istream because yyin is FILE
220	ostream * output = & cout;
221	list< Declaration * > translationUnit;
222
223	Signal( SIGSEGV, sigSegvBusHandler, SA_SIGINFO );
224	Signal( SIGBUS, sigSegvBusHandler, SA_SIGINFO );
225	Signal( SIGFPE, sigFpeHandler, SA_SIGINFO );
226	Signal( SIGABRT, sigAbortHandler, SA_SIGINFO );
227
228	// cout << "main" << endl;
229	// for ( int i = 0; i < argc; i += 1 ) {
230	// cout << '\t' << argv[i] << endl;
231	// } // for
232
233	parse_cmdline( argc, argv ); // process command-line arguments
234	CodeGen::FixMain::setReplaceMain( !nomainp );
235
236	if ( waiting_for_gdb ) {
237	cerr << "Waiting for gdb" << endl;
238	cerr << "run :" << endl;
239	cerr << " gdb attach " << getpid() << endl;
240	raise(SIGSTOP);
241	} // if
242
243	try {
244	// choose to read the program from a file or stdin
245	if ( optind < argc ) { // any commands after the flags ? => input file name
246	input = fopen( argv[ optind ], "r" );
247	assertf( input, "cannot open %s because %s\n", argv[ optind ], strerror( errno ) );
248	optind += 1;
249	} else { // no input file name
250	input = stdin;
251	} // if
252
253	Stats::Time::StartGlobal();
254	NewPass("Parse");
255	Stats::Time::StartBlock("Parse");
256
257	// read in the builtins, extras, and the prelude
258	if ( ! nopreludep ) { // include gcc builtins
259	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
260
261	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
262
263	// Read to gcc builtins, if not generating the cfa library
264	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cf").c_str(), "r" );
265	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
266	parse( gcc_builtins, LinkageSpec::Compiler );
267
268	// read the extra prelude in, if not generating the cfa library
269	FILE * extras = fopen( (PreludeDirector + "/extras.cf").c_str(), "r" );
270	assertf( extras, "cannot open extras.cf\n" );
271	parse( extras, LinkageSpec::BuiltinC );
272
273	if ( ! libcfap ) {
274	// read the prelude in, if not generating the cfa library
275	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
276	assertf( prelude, "cannot open prelude.cfa\n" );
277	parse( prelude, LinkageSpec::Intrinsic );
278
279	// Read to cfa builtins, if not generating the cfa library
280	FILE * builtins = fopen( (PreludeDirector + "/builtins.cf").c_str(), "r" );
281	assertf( builtins, "cannot open builtins.cf\n" );
282	parse( builtins, LinkageSpec::BuiltinCFA );
283	} // if
284	} // if
285
286	parse( input, libcfap ? LinkageSpec::Intrinsic : LinkageSpec::Cforall, yydebug );
287
288	if ( parsep ) {
289	parseTree->printList( cout );
290	delete parseTree;
291	return EXIT_SUCCESS;
292	} // if
293
294	buildList( parseTree, translationUnit );
295	delete parseTree;
296	parseTree = nullptr;
297
298	if ( astp ) {
299	dump( translationUnit );
300	return EXIT_SUCCESS;
301	} // if
302
303	// Temporary: fill locations after parsing so that every node has a location, for early error messages.
304	// Eventually we should pass the locations from the parser to every node, but this quick and dirty solution
305	// works okay for now.
306	CodeTools::fillLocations( translationUnit );
307	Stats::Time::StopBlock();
308
309	PASS( "Translate Exception Declarations", ControlStruct::translateExcept( translationUnit ) );
310	if ( exdeclp ) {
311	dump( translationUnit );
312	return EXIT_SUCCESS;
313	} // if
314
315	// add the assignment statement after the initialization of a type parameter
316	PASS( "Validate", SymTab::validate( translationUnit, symtabp ) );
317	if ( symtabp ) {
318	deleteAll( translationUnit );
319	return EXIT_SUCCESS;
320	} // if
321
322	if ( expraltp ) {
323	PassVisitor<ResolvExpr::AlternativePrinter> printer( cout );
324	acceptAll( translationUnit, printer );
325	return EXIT_SUCCESS;
326	} // if
327
328	if ( validp ) {
329	dump( translationUnit );
330	return EXIT_SUCCESS;
331	} // if
332
333	PASS( "Translate Throws", ControlStruct::translateThrows( translationUnit ) );
334	PASS( "Fix Labels", ControlStruct::fixLabels( translationUnit ) );
335	PASS( "Fix Names", CodeGen::fixNames( translationUnit ) );
336	PASS( "Gen Init", InitTweak::genInit( translationUnit ) );
337	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( translationUnit ) );
338	if ( libcfap ) {
339	// generate the bodies of cfa library functions
340	LibCfa::makeLibCfa( translationUnit );
341	} // if
342
343	if ( declstatsp ) {
344	CodeTools::printDeclStats( translationUnit );
345	deleteAll( translationUnit );
346	return EXIT_SUCCESS;
347	} // if
348
349	if ( bresolvep ) {
350	dump( translationUnit );
351	return EXIT_SUCCESS;
352	} // if
353
354	CodeTools::fillLocations( translationUnit );
355
356	if ( resolvprotop ) {
357	CodeTools::dumpAsResolvProto( translationUnit );
358	return EXIT_SUCCESS;
359	} // if
360
361	if( useNewAST ) {
362	if (Stats::Counters::enabled) {
363	ast::pass_visitor_stats.avg = Stats::Counters::build<Stats::Counters::AverageCounter<double>>("Average Depth - New");
364	ast::pass_visitor_stats.max = Stats::Counters::build<Stats::Counters::MaxCounter<double>>("Max depth - New");
365	}
366	auto transUnit = convert( move( translationUnit ) );
367	PASS( "Resolve", ResolvExpr::resolve( transUnit ) );
368	if ( exprp ) {
369	dump( move( transUnit ) );
370	return EXIT_SUCCESS;
371	} // if
372
373	forceFillCodeLocations( transUnit );
374
375	PASS( "Fix Init", InitTweak::fix(transUnit, buildingLibrary()));
376	translationUnit = convert( move( transUnit ) );
377	} else {
378	PASS( "Resolve", ResolvExpr::resolve( translationUnit ) );
379	if ( exprp ) {
380	dump( translationUnit );
381	return EXIT_SUCCESS;
382	}
383
384	PASS( "Fix Init", InitTweak::fix( translationUnit, buildingLibrary() ) );
385	}
386
387	// fix ObjectDecl - replaces ConstructorInit nodes
388	if ( ctorinitp ) {
389	dump ( translationUnit );
390	return EXIT_SUCCESS;
391	} // if
392
393	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
394
395	PASS( "Translate Tries" , ControlStruct::translateTries( translationUnit ) );
396
397	PASS( "Gen Waitfor" , Concurrency::generateWaitFor( translationUnit ) );
398
399	PASS( "Convert Specializations", GenPoly::convertSpecializations( translationUnit ) ); // needs to happen before tuple types are expanded
400
401	PASS( "Expand Tuples", Tuples::expandTuples( translationUnit ) ); // xxx - is this the right place for this?
402
403	if ( tuplep ) {
404	dump( translationUnit );
405	return EXIT_SUCCESS;
406	} // if
407
408	PASS( "Virtual Expand Casts", Virtual::expandCasts( translationUnit ) ); // Must come after translateEHM
409
410	PASS( "Instantiate Generics", GenPoly::instantiateGeneric( translationUnit ) );
411	if ( genericsp ) {
412	dump( translationUnit );
413	return EXIT_SUCCESS;
414	} // if
415
416	PASS( "Convert L-Value", GenPoly::convertLvalue( translationUnit ) );
417
418	if ( bboxp ) {
419	dump( translationUnit );
420	return EXIT_SUCCESS;
421	} // if
422	PASS( "Box", GenPoly::box( translationUnit ) );
423
424	PASS( "Link-Once", CodeGen::translateLinkOnce( translationUnit ) );
425
426	// Code has been lowered to C, now we can start generation.
427
428	if ( bcodegenp ) {
429	dump( translationUnit );
430	return EXIT_SUCCESS;
431	} // if
432
433	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
434	output = new ofstream( argv[ optind ] );
435	} // if
436
437	CodeTools::fillLocations( translationUnit );
438	PASS( "Code Gen", CodeGen::generate( translationUnit, *output, ! genproto, prettycodegenp, true, linemarks ) );
439
440	CodeGen::FixMain::fix( *output, (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	dump( translationUnit, cerr );
448	cerr << endl << "---End of AST, begin error message:---\n" << endl;
449	} // if
450	e.print();
451	if ( output != &cout ) {
452	delete output;
453	} // if
454	return EXIT_FAILURE;
455	} catch ( UnimplementedError & e ) {
456	cout << "Sorry, " << e.get_what() << " is not currently implemented" << endl;
457	if ( output != &cout ) {
458	delete output;
459	} // if
460	return EXIT_FAILURE;
461	} catch ( CompilerError & e ) {
462	cerr << "Compiler Error: " << e.get_what() << endl;
463	cerr << "(please report bugs to [REDACTED])" << endl;
464	if ( output != &cout ) {
465	delete output;
466	} // if
467	return EXIT_FAILURE;
468	} catch ( std::bad_alloc & ) {
469	cerr << "cfa-cpp compilation error std::bad_alloc" << endl;
470	backtrace( 1 );
471	abort();
472	} catch ( ... ) {
473	exception_ptr eptr = current_exception();
474	try {
475	if (eptr) {
476	rethrow_exception(eptr);
477	} else {
478	cerr << "cfa-cpp compilation error exception uncaught and unknown" << endl;
479	} // if
480	} catch( const exception & e ) {
481	cerr << "cfa-cpp compilation error uncaught exception \"" << e.what() << "\"\n";
482	} // try
483	return EXIT_FAILURE;
484	} // try
485
486	deleteAll( translationUnit );
487	Stats::print();
488	return EXIT_SUCCESS;
489	} // main
490
491
492	static const char optstring[] = ":c:ghlLmNnpdOAP:S:twW:D:";
493
494	enum { PreludeDir = 128 };
495	static struct option long_opts[] = {
496	{ "colors", required_argument, nullptr, 'c' },
497	{ "gdb", no_argument, nullptr, 'g' },
498	{ "help", no_argument, nullptr, 'h' },
499	{ "libcfa", no_argument, nullptr, 'l' },
500	{ "linemarks", no_argument, nullptr, 'L' },
501	{ "no-main", no_argument, 0, 'm' },
502	{ "no-linemarks", no_argument, nullptr, 'N' },
503	{ "no-prelude", no_argument, nullptr, 'n' },
504	{ "prototypes", no_argument, nullptr, 'p' },
505	{ "deterministic-out", no_argument, nullptr, 'd' },
506	{ "old-ast", no_argument, nullptr, 'O'},
507	{ "new-ast", no_argument, nullptr, 'A'},
508	{ "print", required_argument, nullptr, 'P' },
509	{ "prelude-dir", required_argument, nullptr, PreludeDir },
510	{ "statistics", required_argument, nullptr, 'S' },
511	{ "tree", no_argument, nullptr, 't' },
512	{ "", no_argument, nullptr, 0 }, // -w
513	{ "", no_argument, nullptr, 0 }, // -W
514	{ "", no_argument, nullptr, 0 }, // -D
515	{ nullptr, 0, nullptr, 0 }
516	}; // long_opts
517
518	static const char * description[] = {
519	"diagnostic color: never, always, auto", // -c
520	"wait for gdb to attach", // -g
521	"print translator help message", // -h
522	"generate libcfa.c", // -l
523	"generate line marks", // -L
524	"do not replace main", // -m
525	"do not generate line marks", // -N
526	"do not read prelude", // -n
527	"do not generate prelude prototypes => prelude not printed", // -p
528	"only print deterministic output", // -d
529	"Use the old-ast", // -O
530	"Use the new-ast", // -A
531	"print", // -P
532	"<directory> prelude directory for debug/nodebug", // no flag
533	"<option-list> enable profiling information: counters, heap, time, all, none", // -S
534	"building cfa standard lib", // -t
535	"", // -w
536	"", // -W
537	"", // -D
538	}; // description
539
540	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
541
542	static struct Printopts {
543	const char * name;
544	int & flag;
545	int val;
546	const char * descript;
547	} printopts[] = {
548	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
549	{ "asterr", errorp, true, "print AST on error" },
550	{ "declstats", declstatsp, true, "code property statistics" },
551	{ "parse", yydebug, true, "yacc (parsing) debug information" },
552	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
553	{ "rproto", resolvprotop, true, "resolver-proto instance" },
554	{ "rsteps", resolvep, true, "print resolver steps" },
555	{ "tree", parsep, true, "print parse tree" },
556	// code dumps
557	{ "ast", astp, true, "print AST after parsing" },
558	{ "exdecl", exdeclp, true, "print AST after translating exception decls" },
559	{ "symevt", symtabp, true, "print AST after symbol table events" },
560	{ "altexpr", expraltp, true, "print alternatives for expressions" },
561	{ "astdecl", validp, true, "print AST after declaration validation pass" },
562	{ "resolver", bresolvep, true, "print AST before resolver step" },
563	{ "astexpr", exprp, true, "print AST after expression analysis" },
564	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
565	{ "tuple", tuplep, true, "print AST after tuple expansion" },
566	{ "astgen", genericsp, true, "print AST after instantiate generics" },
567	{ "box", bboxp, true, "print AST before box step" },
568	{ "codegen", bcodegenp, true, "print AST before code generation" },
569	};
570	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
571
572	static void usage( char * argv[] ) {
573	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
574	int i = 0, j = 1; // j skips starting colon
575	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
576	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
577	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
578	cout << " -" << optstring[j] << ",";
579	} else { // no flag
580	j -= 1; // compensate
581	cout << " ";
582	} // if
583	cout << " --" << left << setw(12) << long_opts[i].name << " ";
584	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
585	cout << "one of: " << endl;
586	for ( int i = 0; i < printoptsSize; i += 1 ) {
587	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
588	} // for
589	} else {
590	cout << description[i] << endl;
591	} // if
592	} // if
593	if ( optstring[j + 1] == ':' ) j += 1;
594	} // for
595	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
596	exit( EXIT_FAILURE );
597	} // usage
598
599	static void parse_cmdline( int argc, char * argv[] ) {
600	opterr = 0; // (global) prevent getopt from printing error messages
601
602	bool Wsuppress = false, Werror = false;
603	int c;
604	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
605	switch ( c ) {
606	case 'c': // diagnostic colors
607	if ( strcmp( optarg, "always" ) == 0 ) {
608	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
609	} else if ( strcmp( optarg, "never" ) == 0 ) {
610	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
611	} else if ( strcmp( optarg, "auto" ) == 0 ) {
612	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
613	} // if
614	break;
615	case 'h': // help message
616	usage( argv ); // no return
617	break;
618	case 'l': // generate libcfa.c
619	libcfap = true;
620	break;
621	case 'L': // generate line marks
622	linemarks = true;
623	break;
624	case 'm': // do not replace main
625	nomainp = true;
626	break;
627	case 'N': // do not generate line marks
628	linemarks = false;
629	break;
630	case 'n': // do not read prelude
631	nopreludep = true;
632	break;
633	case 'p': // generate prototypes for prelude functions
634	genproto = true;
635	break;
636	case 'd': // don't print non-deterministic output
637	deterministic_output = true;
638	break;
639	case 'O': // don't print non-deterministic output
640	useNewAST = false;
641	break;
642	case 'A': // don't print non-deterministic output
643	useNewAST = true;
644	break;
645	case 'P': // print options
646	for ( int i = 0;; i += 1 ) {
647	if ( i == printoptsSize ) {
648	cout << "Unknown --print option " << optarg << endl;
649	goto Default;
650	} // if
651	if ( strcmp( optarg, printopts[i].name ) == 0 ) {
652	printopts[i].flag = printopts[i].val;
653	break;
654	} // if
655	} // for
656	break;
657	case PreludeDir: // prelude directory for debug/nodebug, hidden
658	PreludeDirector = optarg;
659	break;
660	case 'S': // enable profiling information, argument comma separated list of names
661	Stats::parse_params( optarg );
662	break;
663	case 't': // building cfa stdlib
664	treep = true;
665	break;
666	case 'g': // wait for gdb
667	waiting_for_gdb = true;
668	break;
669	case 'w': // suppress all warnings, hidden
670	Wsuppress = true;
671	break;
672	case 'W': // coordinate gcc -W with CFA, hidden
673	if ( strcmp( optarg, "all" ) == 0 ) {
674	SemanticWarning_EnableAll();
675	} else if ( strcmp( optarg, "error" ) == 0 ) {
676	Werror = true;
677	} else {
678	char * warning = optarg;
679	Severity s;
680	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
681	warning += 3;
682	s = Severity::Suppress;
683	} else {
684	s = Severity::Warn;
685	} // if
686	SemanticWarning_Set( warning, s );
687	} // if
688	break;
689	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
690	break;
691	case '?': // unknown option
692	if ( optopt ) { // short option ?
693	cout << "Unknown option -" << (char)optopt << endl;
694	} else {
695	cout << "Unknown option " << argv[optind - 1] << endl;
696	} // if
697	goto Default;
698	case ':': // missing option
699	if ( optopt ) { // short option ?
700	cout << "Missing option for -" << (char)optopt << endl;
701	} else {
702	cout << "Missing option for " << argv[optind - 1] << endl;
703	} // if
704	goto Default;
705	Default:
706	default:
707	usage( argv ); // no return
708	} // switch
709	} // while
710
711	if ( Werror ) {
712	SemanticWarning_WarningAsError();
713	} // if
714	if ( Wsuppress ) {
715	SemanticWarning_SuppressAll();
716	} // if
717	// for ( const auto w : WarningFormats ) {
718	// cout << w.name << ' ' << (int)w.severity << endl;
719	// } // for
720	} // parse_cmdline
721
722	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit ) {
723	extern int yyparse( void );
724	extern FILE * yyin;
725	extern int yylineno;
726
727	::linkage = linkage; // set globals
728	yyin = input;
729	yylineno = 1;
730	int parseStatus = yyparse();
731
732	fclose( input );
733	if ( shouldExit \|\| parseStatus != 0 ) {
734	exit( parseStatus );
735	} // if
736	} // parse
737
738	static bool notPrelude( Declaration * decl ) {
739	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
740	} // notPrelude
741
742	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
743	list< Declaration * > decls;
744
745	if ( genproto ) {
746	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
747	} else {
748	decls = translationUnit;
749	} // if
750
751	// depending on commandline options, either generate code or dump the AST
752	if ( codegenp ) {
753	CodeGen::generate( decls, out, ! genproto, prettycodegenp );
754	} else {
755	printAll( decls, out );
756	} // if
757	deleteAll( translationUnit );
758	} // dump
759
760	static void dump( ast::TranslationUnit && transUnit, ostream & out ) {
761	std::list< Declaration * > translationUnit = convert( move( transUnit ) );
762	dump( translationUnit, out );
763	}
764
765	// Local Variables: //
766	// tab-width: 4 //
767	// mode: c++ //
768	// compile-command: "make install" //
769	// End: //

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