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source: src/main.cc @ de57af9

ADTarm-ehast-experimentalenumforall-pointer-decayjacob/cs343-translationnew-ast-unique-exprpthread-emulationqualifiedEnum

Last change on this file since de57af9 was 77d601f, checked in by Peter A. Buhr <pabuhr@…>, 4 years ago
dump core for cfa-cpp bad_alloc exception
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File size: 26.8 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 : Sat Mar 6 15:49:00 2021
13	// Update Count : 656
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 "CodeTools/DeclStats.h" // for printDeclStats
40	#include "CodeTools/ResolvProtoDump.h" // for dumpAsResolvProto
41	#include "CodeTools/TrackLoc.h" // for fillLocations
42	#include "Common/CodeLocationTools.hpp" // for forceFillCodeLocations
43	#include "Common/CompilerError.h" // for CompilerError
44	#include "Common/Stats.h"
45	#include "Common/PassVisitor.h"
46	#include "Common/SemanticError.h" // for SemanticError
47	#include "Common/UnimplementedError.h" // for UnimplementedError
48	#include "Common/utility.h" // for deleteAll, filter, printAll
49	#include "Concurrency/Waitfor.h" // for generateWaitfor
50	#include "ControlStruct/ExceptTranslate.h" // for translateEHM
51	#include "ControlStruct/Mutate.h" // for mutate
52	#include "GenPoly/Box.h" // for box
53	#include "GenPoly/InstantiateGeneric.h" // for instantiateGeneric
54	#include "GenPoly/Lvalue.h" // for convertLvalue
55	#include "GenPoly/Specialize.h" // for convertSpecializations
56	#include "InitTweak/FixInit.h" // for fix
57	#include "InitTweak/GenInit.h" // for genInit
58	#include "MakeLibCfa.h" // for makeLibCfa
59	#include "Parser/ParseNode.h" // for DeclarationNode, buildList
60	#include "Parser/TypedefTable.h" // for TypedefTable
61	#include "ResolvExpr/AlternativePrinter.h" // for AlternativePrinter
62	#include "ResolvExpr/Resolver.h" // for resolve
63	#include "SymTab/Validate.h" // for validate
64	#include "SynTree/LinkageSpec.h" // for Spec, Cforall, Intrinsic
65	#include "SynTree/Declaration.h" // for Declaration
66	#include "SynTree/Visitor.h" // for acceptAll
67	#include "Tuples/Tuples.h" // for expandMemberTuples, expan...
68	#include "Virtual/ExpandCasts.h" // for expandCasts
69
70
71	static void NewPass( const char * const name ) {
72	Stats::Heap::newPass( name );
73	using namespace Stats::Counters;
74	{
75	static auto group = build<CounterGroup>( "Pass Visitor" );
76	auto pass = build<CounterGroup>( name, group );
77	pass_visitor_stats.depth = 0;
78	pass_visitor_stats.avg = build<AverageCounter<double>>( "Average Depth", pass );
79	pass_visitor_stats.max = build<MaxCounter<double>>( "Max Depth", pass );
80	}
81	{
82	static auto group = build<CounterGroup>( "Syntax Node" );
83	auto pass = build<CounterGroup>( name, group );
84	BaseSyntaxNode::new_nodes = build<SimpleCounter>( "Allocs", pass );
85	}
86	}
87
88	#define PASS( name, pass ) \
89	if ( errorp ) { cerr << name << endl; } \
90	NewPass(name); \
91	Stats::Time::StartBlock(name); \
92	pass; \
93	Stats::Time::StopBlock();
94
95	LinkageSpec::Spec linkage = LinkageSpec::Cforall;
96	TypedefTable typedefTable;
97	DeclarationNode * parseTree = nullptr; // program parse tree
98
99	static bool waiting_for_gdb = false; // flag to set cfa-cpp to wait for gdb on start
100
101	static string PreludeDirector = "";
102
103	static void parse_cmdline( int argc, char * argv[] );
104	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit = false );
105	static void dump( list< Declaration * > & translationUnit, ostream & out = cout );
106	static void dump( ast::TranslationUnit && transUnit, ostream & out = cout );
107
108	static void backtrace( int start ) { // skip first N stack frames
109	enum { Frames = 50, }; // maximum number of stack frames
110	void * array[Frames];
111	size_t size = ::backtrace( array, Frames );
112	char ** messages = ::backtrace_symbols( array, size ); // does not demangle names
113
114	*index( messages[0], '(' ) = '\0'; // find executable name
115	cerr << "Stack back trace for: " << messages[0] << endl;
116
117	// skip last 2 stack frames after main
118	for ( unsigned int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
119	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
120
121	for ( char * p = messages[i]; *p; p += 1 ) { // find parantheses and +offset
122	if ( *p == '(' ) {
123	mangled_name = p;
124	} else if ( *p == '+' ) {
125	offset_begin = p;
126	} else if ( *p == ')' ) {
127	offset_end = p;
128	break;
129	} // if
130	} // for
131
132	// if line contains symbol, attempt to demangle
133	int frameNo = i - start;
134	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
135	*mangled_name++ = '\0'; // delimit strings
136	*offset_begin++ = '\0';
137	*offset_end++ = '\0';
138
139	int status;
140	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
141	// bug in __cxa_demangle for single-character lower-case non-mangled names
142	if ( status == 0 ) { // demangling successful ?
143	cerr << "(" << frameNo << ") " << messages[i] << " : "
144	<< real_name << "+" << offset_begin << offset_end << endl;
145	} else { // otherwise, output mangled name
146	cerr << "(" << frameNo << ") " << messages[i] << " : "
147	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
148	} // if
149
150	free( real_name );
151	} else { // otherwise, print the whole line
152	cerr << "(" << frameNo << ") " << messages[i] << endl;
153	} // if
154	} // for
155
156	free( messages );
157	} // backtrace
158
159	#define SIGPARMS int sig __attribute__(( unused )), siginfo_t * sfp __attribute__(( unused )), ucontext_t * cxt __attribute__(( unused ))
160
161	static void Signal( int sig, void (* handler)(SIGPARMS), int flags ) {
162	struct sigaction act;
163
164	act.sa_sigaction = (void ()(int, siginfo_t , void *))handler;
165	act.sa_flags = flags;
166
167	if ( sigaction( sig, &act, nullptr ) == -1 ) {
168	cerr << "cfa-cpp compilation error problem installing signal handler, error(" << errno << ") " << strerror( errno ) << endl;
169	_exit( EXIT_FAILURE );
170	} // if
171	} // Signal
172
173	static void sigSegvBusHandler( SIGPARMS ) {
174	if ( sfp->si_addr == nullptr ) {
175	cerr << "Null pointer (nullptr) dereference." << endl;
176	} else {
177	cerr << (sig == SIGSEGV ? "Segment fault" : "Bus error") << " at memory location " << sfp->si_addr << "." << endl
178	<< "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;
179	} // if
180	backtrace( 2 ); // skip first 2 stack frames
181	abort(); // cause core dump for debugging
182	} // sigSegvBusHandler
183
184	static void sigFpeHandler( SIGPARMS ) {
185	const char * msg;
186
187	switch ( sfp->si_code ) {
188	case FPE_INTDIV: case FPE_FLTDIV: msg = "divide by zero"; break;
189	case FPE_FLTOVF: msg = "overflow"; break;
190	case FPE_FLTUND: msg = "underflow"; break;
191	case FPE_FLTRES: msg = "inexact result"; break;
192	case FPE_FLTINV: msg = "invalid operation"; break;
193	default: msg = "unknown";
194	} // choose
195	cerr << "Computation error " << msg << " at location " << sfp->si_addr << endl
196	<< "Possible cause is constant-expression evaluation invalid." << endl;
197	backtrace( 2 ); // skip first 2 stack frames
198	abort(); // cause core dump for debugging
199	} // sigFpeHandler
200
201	static void sigAbortHandler( SIGPARMS ) {
202	backtrace( 6 ); // skip first 6 stack frames
203	Signal( SIGABRT, (void (*)(SIGPARMS))SIG_DFL, SA_SIGINFO ); // reset default signal handler
204	raise( SIGABRT ); // reraise SIGABRT
205	} // sigAbortHandler
206
207	int main( int argc, char * argv[] ) {
208	FILE * input; // use FILE rather than istream because yyin is FILE
209	ostream * output = & cout;
210	list< Declaration * > translationUnit;
211
212	Signal( SIGSEGV, sigSegvBusHandler, SA_SIGINFO );
213	Signal( SIGBUS, sigSegvBusHandler, SA_SIGINFO );
214	Signal( SIGFPE, sigFpeHandler, SA_SIGINFO );
215	Signal( SIGABRT, sigAbortHandler, SA_SIGINFO );
216
217	// cout << "main" << endl;
218	// for ( int i = 0; i < argc; i += 1 ) {
219	// cout << '\t' << argv[i] << endl;
220	// } // for
221
222	parse_cmdline( argc, argv ); // process command-line arguments
223	CodeGen::FixMain::setReplaceMain( !nomainp );
224
225	if ( waiting_for_gdb ) {
226	cerr << "Waiting for gdb" << endl;
227	cerr << "run :" << endl;
228	cerr << " gdb attach " << getpid() << endl;
229	raise(SIGSTOP);
230	} // if
231
232	try {
233	// choose to read the program from a file or stdin
234	if ( optind < argc ) { // any commands after the flags ? => input file name
235	input = fopen( argv[ optind ], "r" );
236	assertf( input, "cannot open %s because %s\n", argv[ optind ], strerror( errno ) );
237	optind += 1;
238	} else { // no input file name
239	input = stdin;
240	} // if
241
242	Stats::Time::StartGlobal();
243	NewPass("Parse");
244	Stats::Time::StartBlock("Parse");
245
246	// read in the builtins, extras, and the prelude
247	if ( ! nopreludep ) { // include gcc builtins
248	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
249
250	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
251
252	// Read to gcc builtins, if not generating the cfa library
253	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cf").c_str(), "r" );
254	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
255	parse( gcc_builtins, LinkageSpec::Compiler );
256
257	// read the extra prelude in, if not generating the cfa library
258	FILE * extras = fopen( (PreludeDirector + "/extras.cf").c_str(), "r" );
259	assertf( extras, "cannot open extras.cf\n" );
260	parse( extras, LinkageSpec::BuiltinC );
261
262	if ( ! libcfap ) {
263	// read the prelude in, if not generating the cfa library
264	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
265	assertf( prelude, "cannot open prelude.cfa\n" );
266	parse( prelude, LinkageSpec::Intrinsic );
267
268	// Read to cfa builtins, if not generating the cfa library
269	FILE * builtins = fopen( (PreludeDirector + "/builtins.cf").c_str(), "r" );
270	assertf( builtins, "cannot open builtins.cf\n" );
271	parse( builtins, LinkageSpec::BuiltinCFA );
272	} // if
273	} // if
274
275	parse( input, libcfap ? LinkageSpec::Intrinsic : LinkageSpec::Cforall, yydebug );
276
277	if ( parsep ) {
278	parseTree->printList( cout );
279	delete parseTree;
280	return EXIT_SUCCESS;
281	} // if
282
283	buildList( parseTree, translationUnit );
284	delete parseTree;
285	parseTree = nullptr;
286
287	if ( astp ) {
288	dump( translationUnit );
289	return EXIT_SUCCESS;
290	} // if
291
292	// Temporary: fill locations after parsing so that every node has a location, for early error messages.
293	// Eventually we should pass the locations from the parser to every node, but this quick and dirty solution
294	// works okay for now.
295	CodeTools::fillLocations( translationUnit );
296	Stats::Time::StopBlock();
297
298	// add the assignment statement after the initialization of a type parameter
299	PASS( "Validate", SymTab::validate( translationUnit, symtabp ) );
300	if ( symtabp ) {
301	deleteAll( translationUnit );
302	return EXIT_SUCCESS;
303	} // if
304
305	if ( expraltp ) {
306	PassVisitor<ResolvExpr::AlternativePrinter> printer( cout );
307	acceptAll( translationUnit, printer );
308	return EXIT_SUCCESS;
309	} // if
310
311	if ( validp ) {
312	dump( translationUnit );
313	return EXIT_SUCCESS;
314	} // if
315
316	PASS( "Translate Throws", ControlStruct::translateThrows( translationUnit ) );
317	PASS( "Fix Labels", ControlStruct::fixLabels( translationUnit ) );
318	PASS( "Fix Names", CodeGen::fixNames( translationUnit ) );
319	PASS( "Gen Init", InitTweak::genInit( translationUnit ) );
320	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( translationUnit ) );
321	if ( libcfap ) {
322	// generate the bodies of cfa library functions
323	LibCfa::makeLibCfa( translationUnit );
324	} // if
325
326	if ( declstatsp ) {
327	CodeTools::printDeclStats( translationUnit );
328	deleteAll( translationUnit );
329	return EXIT_SUCCESS;
330	} // if
331
332	if ( bresolvep ) {
333	dump( translationUnit );
334	return EXIT_SUCCESS;
335	} // if
336
337	CodeTools::fillLocations( translationUnit );
338
339	if ( resolvprotop ) {
340	CodeTools::dumpAsResolvProto( translationUnit );
341	return EXIT_SUCCESS;
342	} // if
343
344	if( useNewAST ) {
345	if (Stats::Counters::enabled) {
346	ast::pass_visitor_stats.avg = Stats::Counters::build<Stats::Counters::AverageCounter<double>>("Average Depth - New");
347	ast::pass_visitor_stats.max = Stats::Counters::build<Stats::Counters::MaxCounter<double>>("Max depth - New");
348	}
349	auto transUnit = convert( move( translationUnit ) );
350	PASS( "Resolve", ResolvExpr::resolve( transUnit ) );
351	if ( exprp ) {
352	dump( move( transUnit ) );
353	return EXIT_SUCCESS;
354	} // if
355
356	forceFillCodeLocations( transUnit );
357
358	PASS( "Fix Init", InitTweak::fix(transUnit, buildingLibrary()));
359	translationUnit = convert( move( transUnit ) );
360	} else {
361	PASS( "Resolve", ResolvExpr::resolve( translationUnit ) );
362	if ( exprp ) {
363	dump( translationUnit );
364	return EXIT_SUCCESS;
365	}
366
367	PASS( "Fix Init", InitTweak::fix( translationUnit, buildingLibrary() ) );
368	}
369
370	// fix ObjectDecl - replaces ConstructorInit nodes
371	if ( ctorinitp ) {
372	dump ( translationUnit );
373	return EXIT_SUCCESS;
374	} // if
375
376	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
377
378	PASS( "Translate Tries" , ControlStruct::translateTries( translationUnit ) );
379
380	PASS( "Gen Waitfor" , Concurrency::generateWaitFor( translationUnit ) );
381
382	PASS( "Convert Specializations", GenPoly::convertSpecializations( translationUnit ) ); // needs to happen before tuple types are expanded
383
384	PASS( "Expand Tuples", Tuples::expandTuples( translationUnit ) ); // xxx - is this the right place for this?
385
386	if ( tuplep ) {
387	dump( translationUnit );
388	return EXIT_SUCCESS;
389	} // if
390
391	PASS( "Virtual Expand Casts", Virtual::expandCasts( translationUnit ) ); // Must come after translateEHM
392
393	PASS( "Instantiate Generics", GenPoly::instantiateGeneric( translationUnit ) );
394	if ( genericsp ) {
395	dump( translationUnit );
396	return EXIT_SUCCESS;
397	} // if
398
399	PASS( "Convert L-Value", GenPoly::convertLvalue( translationUnit ) );
400
401	if ( bboxp ) {
402	dump( translationUnit );
403	return EXIT_SUCCESS;
404	} // if
405	PASS( "Box", GenPoly::box( translationUnit ) );
406
407	if ( bcodegenp ) {
408	dump( translationUnit );
409	return EXIT_SUCCESS;
410	} // if
411
412	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
413	output = new ofstream( argv[ optind ] );
414	} // if
415
416	CodeTools::fillLocations( translationUnit );
417	PASS( "Code Gen", CodeGen::generate( translationUnit, *output, ! genproto, prettycodegenp, true, linemarks ) );
418
419	CodeGen::FixMain::fix( *output, (PreludeDirector + "/bootloader.c").c_str() );
420	if ( output != &cout ) {
421	delete output;
422	} // if
423	} catch ( SemanticErrorException & e ) {
424	if ( errorp ) {
425	cerr << "---AST at error:---" << endl;
426	dump( translationUnit, cerr );
427	cerr << endl << "---End of AST, begin error message:---\n" << endl;
428	} // if
429	e.print();
430	if ( output != &cout ) {
431	delete output;
432	} // if
433	return EXIT_FAILURE;
434	} catch ( UnimplementedError & e ) {
435	cout << "Sorry, " << e.get_what() << " is not currently implemented" << endl;
436	if ( output != &cout ) {
437	delete output;
438	} // if
439	return EXIT_FAILURE;
440	} catch ( CompilerError & e ) {
441	cerr << "Compiler Error: " << e.get_what() << endl;
442	cerr << "(please report bugs to [REDACTED])" << endl;
443	if ( output != &cout ) {
444	delete output;
445	} // if
446	return EXIT_FAILURE;
447	} catch ( std::bad_alloc & ) {
448	cerr << "cfa-cpp compilation error std::bad_alloc" << endl;
449	backtrace( 1 );
450	abort();
451	} catch ( ... ) {
452	exception_ptr eptr = current_exception();
453	try {
454	if (eptr) {
455	rethrow_exception(eptr);
456	} else {
457	cerr << "cfa-cpp compilation error exception uncaught and unknown" << endl;
458	} // if
459	} catch( const exception & e ) {
460	cerr << "cfa-cpp compilation error uncaught exception \"" << e.what() << "\"\n";
461	} // try
462	return EXIT_FAILURE;
463	} // try
464
465	deleteAll( translationUnit );
466	Stats::print();
467	return EXIT_SUCCESS;
468	} // main
469
470
471	static const char optstring[] = ":c:ghlLmNnpdOAP:S:twW:D:";
472
473	enum { PreludeDir = 128 };
474	static struct option long_opts[] = {
475	{ "colors", required_argument, nullptr, 'c' },
476	{ "gdb", no_argument, nullptr, 'g' },
477	{ "help", no_argument, nullptr, 'h' },
478	{ "libcfa", no_argument, nullptr, 'l' },
479	{ "linemarks", no_argument, nullptr, 'L' },
480	{ "no-main", no_argument, 0, 'm' },
481	{ "no-linemarks", no_argument, nullptr, 'N' },
482	{ "no-prelude", no_argument, nullptr, 'n' },
483	{ "prototypes", no_argument, nullptr, 'p' },
484	{ "deterministic-out", no_argument, nullptr, 'd' },
485	{ "old-ast", no_argument, nullptr, 'O'},
486	{ "new-ast", no_argument, nullptr, 'A'},
487	{ "print", required_argument, nullptr, 'P' },
488	{ "prelude-dir", required_argument, nullptr, PreludeDir },
489	{ "statistics", required_argument, nullptr, 'S' },
490	{ "tree", no_argument, nullptr, 't' },
491	{ "", no_argument, nullptr, 0 }, // -w
492	{ "", no_argument, nullptr, 0 }, // -W
493	{ "", no_argument, nullptr, 0 }, // -D
494	{ nullptr, 0, nullptr, 0 }
495	}; // long_opts
496
497	static const char * description[] = {
498	"diagnostic color: never, always, auto", // -c
499	"wait for gdb to attach", // -g
500	"print translator help message", // -h
501	"generate libcfa.c", // -l
502	"generate line marks", // -L
503	"do not replace main", // -m
504	"do not generate line marks", // -N
505	"do not read prelude", // -n
506	"do not generate prelude prototypes => prelude not printed", // -p
507	"only print deterministic output", // -d
508	"Use the old-ast", // -O
509	"Use the new-ast", // -A
510	"print", // -P
511	"<directory> prelude directory for debug/nodebug", // no flag
512	"<option-list> enable profiling information: counters, heap, time, all, none", // -S
513	"building cfa standard lib", // -t
514	"", // -w
515	"", // -W
516	"", // -D
517	}; // description
518
519	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
520
521	static struct Printopts {
522	const char * name;
523	int & flag;
524	int val;
525	const char * descript;
526	} printopts[] = {
527	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
528	{ "asterr", errorp, true, "print AST on error" },
529	{ "declstats", declstatsp, true, "code property statistics" },
530	{ "parse", yydebug, true, "yacc (parsing) debug information" },
531	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
532	{ "rproto", resolvprotop, true, "resolver-proto instance" },
533	{ "rsteps", resolvep, true, "print resolver steps" },
534	{ "tree", parsep, true, "print parse tree" },
535	// code dumps
536	{ "ast", astp, true, "print AST after parsing" },
537	{ "symevt", symtabp, true, "print AST after symbol table events" },
538	{ "altexpr", expraltp, true, "print alternatives for expressions" },
539	{ "astdecl", validp, true, "print AST after declaration validation pass" },
540	{ "resolver", bresolvep, true, "print AST before resolver step" },
541	{ "astexpr", exprp, true, "print AST after expression analysis" },
542	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
543	{ "tuple", tuplep, true, "print AST after tuple expansion" },
544	{ "astgen", genericsp, true, "print AST after instantiate generics" },
545	{ "box", bboxp, true, "print AST before box step" },
546	{ "codegen", bcodegenp, true, "print AST before code generation" },
547	};
548	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
549
550	static void usage( char * argv[] ) {
551	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
552	int i = 0, j = 1; // j skips starting colon
553	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
554	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
555	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
556	cout << " -" << optstring[j] << ",";
557	} else { // no flag
558	j -= 1; // compensate
559	cout << " ";
560	} // if
561	cout << " --" << left << setw(12) << long_opts[i].name << " ";
562	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
563	cout << "one of: " << endl;
564	for ( int i = 0; i < printoptsSize; i += 1 ) {
565	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
566	} // for
567	} else {
568	cout << description[i] << endl;
569	} // if
570	} // if
571	if ( optstring[j + 1] == ':' ) j += 1;
572	} // for
573	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
574	exit( EXIT_FAILURE );
575	} // usage
576
577	static void parse_cmdline( int argc, char * argv[] ) {
578	opterr = 0; // (global) prevent getopt from printing error messages
579
580	bool Wsuppress = false, Werror = false;
581	int c;
582	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
583	switch ( c ) {
584	case 'c': // diagnostic colors
585	if ( strcmp( optarg, "always" ) == 0 ) {
586	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
587	} else if ( strcmp( optarg, "never" ) == 0 ) {
588	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
589	} else if ( strcmp( optarg, "auto" ) == 0 ) {
590	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
591	} // if
592	break;
593	case 'h': // help message
594	usage( argv ); // no return
595	break;
596	case 'l': // generate libcfa.c
597	libcfap = true;
598	break;
599	case 'L': // generate line marks
600	linemarks = true;
601	break;
602	case 'm': // do not replace main
603	nomainp = true;
604	break;
605	case 'N': // do not generate line marks
606	linemarks = false;
607	break;
608	case 'n': // do not read prelude
609	nopreludep = true;
610	break;
611	case 'p': // generate prototypes for prelude functions
612	genproto = true;
613	break;
614	case 'd': // don't print non-deterministic output
615	deterministic_output = true;
616	break;
617	case 'O': // don't print non-deterministic output
618	useNewAST = false;
619	break;
620	case 'A': // don't print non-deterministic output
621	useNewAST = true;
622	break;
623	case 'P': // print options
624	for ( int i = 0;; i += 1 ) {
625	if ( i == printoptsSize ) {
626	cout << "Unknown --print option " << optarg << endl;
627	goto Default;
628	} // if
629	if ( strcmp( optarg, printopts[i].name ) == 0 ) {
630	printopts[i].flag = printopts[i].val;
631	break;
632	} // if
633	} // for
634	break;
635	case PreludeDir: // prelude directory for debug/nodebug, hidden
636	PreludeDirector = optarg;
637	break;
638	case 'S': // enable profiling information, argument comma separated list of names
639	Stats::parse_params( optarg );
640	break;
641	case 't': // building cfa stdlib
642	treep = true;
643	break;
644	case 'g': // wait for gdb
645	waiting_for_gdb = true;
646	break;
647	case 'w': // suppress all warnings, hidden
648	Wsuppress = true;
649	break;
650	case 'W': // coordinate gcc -W with CFA, hidden
651	if ( strcmp( optarg, "all" ) == 0 ) {
652	SemanticWarning_EnableAll();
653	} else if ( strcmp( optarg, "error" ) == 0 ) {
654	Werror = true;
655	} else {
656	char * warning = optarg;
657	Severity s;
658	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
659	warning += 3;
660	s = Severity::Suppress;
661	} else {
662	s = Severity::Warn;
663	} // if
664	SemanticWarning_Set( warning, s );
665	} // if
666	break;
667	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
668	break;
669	case '?': // unknown option
670	if ( optopt ) { // short option ?
671	cout << "Unknown option -" << (char)optopt << endl;
672	} else {
673	cout << "Unknown option " << argv[optind - 1] << endl;
674	} // if
675	goto Default;
676	case ':': // missing option
677	if ( optopt ) { // short option ?
678	cout << "Missing option for -" << (char)optopt << endl;
679	} else {
680	cout << "Missing option for " << argv[optind - 1] << endl;
681	} // if
682	goto Default;
683	Default:
684	default:
685	usage( argv ); // no return
686	} // switch
687	} // while
688
689	if ( Werror ) {
690	SemanticWarning_WarningAsError();
691	} // if
692	if ( Wsuppress ) {
693	SemanticWarning_SuppressAll();
694	} // if
695	// for ( const auto w : WarningFormats ) {
696	// cout << w.name << ' ' << (int)w.severity << endl;
697	// } // for
698	} // parse_cmdline
699
700	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit ) {
701	extern int yyparse( void );
702	extern FILE * yyin;
703	extern int yylineno;
704
705	::linkage = linkage; // set globals
706	yyin = input;
707	yylineno = 1;
708	int parseStatus = yyparse();
709
710	fclose( input );
711	if ( shouldExit \|\| parseStatus != 0 ) {
712	exit( parseStatus );
713	} // if
714	} // parse
715
716	static bool notPrelude( Declaration * decl ) {
717	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
718	} // notPrelude
719
720	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
721	list< Declaration * > decls;
722
723	if ( genproto ) {
724	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
725	} else {
726	decls = translationUnit;
727	} // if
728
729	// depending on commandline options, either generate code or dump the AST
730	if ( codegenp ) {
731	CodeGen::generate( decls, out, ! genproto, prettycodegenp );
732	} else {
733	printAll( decls, out );
734	} // if
735	deleteAll( translationUnit );
736	} // dump
737
738	static void dump( ast::TranslationUnit && transUnit, ostream & out ) {
739	std::list< Declaration * > translationUnit = convert( move( transUnit ) );
740	dump( translationUnit, out );
741	}
742
743	// Local Variables: //
744	// tab-width: 4 //
745	// mode: c++ //
746	// compile-command: "make install" //
747	// End: //

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