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source: src/main.cc @ 26ca815

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

Last change on this file since 26ca815 was f57faf6f, checked in by Andrew Beach <ajbeach@…>, 4 years ago
Added a new-ast tools for code locations. The fill pass is being used the check pass is catching lots of missing locations when you enable it.
Property mode set to `100644`
File size: 26.4 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 : Mon Dec 7 15:29:00 2020
13	// Update Count : 639
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
107	static void backtrace( int start ) { // skip first N stack frames
108	enum { Frames = 50, }; // maximum number of stack frames
109	void * array[Frames];
110	size_t size = ::backtrace( array, Frames );
111	char ** messages = ::backtrace_symbols( array, size ); // does not demangle names
112
113	*index( messages[0], '(' ) = '\0'; // find executable name
114	cerr << "Stack back trace for: " << messages[0] << endl;
115
116	// skip last 2 stack frames after main
117	for ( unsigned int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
118	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
119
120	for ( char * p = messages[i]; *p; p += 1 ) { // find parantheses and +offset
121	if ( *p == '(' ) {
122	mangled_name = p;
123	} else if ( *p == '+' ) {
124	offset_begin = p;
125	} else if ( *p == ')' ) {
126	offset_end = p;
127	break;
128	} // if
129	} // for
130
131	// if line contains symbol, attempt to demangle
132	int frameNo = i - start;
133	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
134	*mangled_name++ = '\0'; // delimit strings
135	*offset_begin++ = '\0';
136	*offset_end++ = '\0';
137
138	int status;
139	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
140	// bug in __cxa_demangle for single-character lower-case non-mangled names
141	if ( status == 0 ) { // demangling successful ?
142	cerr << "(" << frameNo << ") " << messages[i] << " : "
143	<< real_name << "+" << offset_begin << offset_end << endl;
144	} else { // otherwise, output mangled name
145	cerr << "(" << frameNo << ") " << messages[i] << " : "
146	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
147	} // if
148
149	free( real_name );
150	} else { // otherwise, print the whole line
151	cerr << "(" << frameNo << ") " << messages[i] << endl;
152	} // if
153	} // for
154
155	free( messages );
156	} // backtrace
157
158	#define SIGPARMS int sig __attribute__(( unused )), siginfo_t * sfp __attribute__(( unused )), ucontext_t * cxt __attribute__(( unused ))
159
160	static void Signal( int sig, void (*handler)(SIGPARMS), int flags ) {
161	struct sigaction act;
162
163	act.sa_sigaction = (void ()(int, siginfo_t , void *))handler;
164	act.sa_flags = flags;
165
166	if ( sigaction( sig, &act, nullptr ) == -1 ) {
167	cerr << "CFA runtime error problem installing signal handler, error(" << errno << ") " << strerror( errno ) << endl;
168	_exit( EXIT_FAILURE );
169	} // if
170	} // Signal
171
172	static void sigSegvBusHandler( SIGPARMS ) {
173	if ( sfp->si_addr == nullptr ) {
174	cerr << "Null pointer (nullptr) dereference." << endl;
175	} else {
176	cerr << (sig == SIGSEGV ? "Segment fault" : "Bus error") << " at memory location " << sfp->si_addr << "." << endl
177	<< "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;
178	} // if
179	backtrace( 2 ); // skip first 2 stack frames
180	abort(); // cause core dump for debugging
181	} // sigSegvBusHandler
182
183	static void sigFpeHandler( SIGPARMS ) {
184	const char * msg;
185
186	switch ( sfp->si_code ) {
187	case FPE_INTDIV: case FPE_FLTDIV: msg = "divide by zero"; break;
188	case FPE_FLTOVF: msg = "overflow"; break;
189	case FPE_FLTUND: msg = "underflow"; break;
190	case FPE_FLTRES: msg = "inexact result"; break;
191	case FPE_FLTINV: msg = "invalid operation"; break;
192	default: msg = "unknown";
193	} // choose
194	cerr << "Computation error " << msg << " at location " << sfp->si_addr << endl
195	<< "Possible cause is constant-expression evaluation invalid." << endl;
196	backtrace( 2 ); // skip first 2 stack frames
197	abort(); // cause core dump for debugging
198	} // sigFpeHandler
199
200	static void sigAbortHandler( SIGPARMS ) {
201	backtrace( 6 ); // skip first 6 stack frames
202	Signal( SIGABRT, (void (*)(SIGPARMS))SIG_DFL, SA_SIGINFO ); // reset default signal handler
203	raise( SIGABRT ); // reraise SIGABRT
204	} // sigAbortHandler
205
206	int main( int argc, char * argv[] ) {
207	FILE * input; // use FILE rather than istream because yyin is FILE
208	ostream * output = & cout;
209	list< Declaration * > translationUnit;
210
211	Signal( SIGSEGV, sigSegvBusHandler, SA_SIGINFO );
212	Signal( SIGBUS, sigSegvBusHandler, SA_SIGINFO );
213	Signal( SIGFPE, sigFpeHandler, SA_SIGINFO );
214	Signal( SIGABRT, sigAbortHandler, SA_SIGINFO );
215
216	// cout << "main" << endl;
217	// for ( int i = 0; i < argc; i += 1 ) {
218	// cout << '\t' << argv[i] << endl;
219	// } // for
220
221	parse_cmdline( argc, argv ); // process command-line arguments
222	CodeGen::FixMain::setReplaceMain( !nomainp );
223
224	if ( waiting_for_gdb ) {
225	cerr << "Waiting for gdb" << endl;
226	cerr << "run :" << endl;
227	cerr << " gdb attach " << getpid() << endl;
228	raise(SIGSTOP);
229	} // if
230
231	try {
232	// choose to read the program from a file or stdin
233	if ( optind < argc ) { // any commands after the flags ? => input file name
234	input = fopen( argv[ optind ], "r" );
235	assertf( input, "cannot open %s because %s\n", argv[ optind ], strerror( errno ) );
236	optind += 1;
237	} else { // no input file name
238	input = stdin;
239	} // if
240
241	Stats::Time::StartGlobal();
242	NewPass("Parse");
243	Stats::Time::StartBlock("Parse");
244
245	// read in the builtins, extras, and the prelude
246	if ( ! nopreludep ) { // include gcc builtins
247	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
248
249	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
250
251	// Read to gcc builtins, if not generating the cfa library
252	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cf").c_str(), "r" );
253	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
254	parse( gcc_builtins, LinkageSpec::Compiler );
255
256	// read the extra prelude in, if not generating the cfa library
257	FILE * extras = fopen( (PreludeDirector + "/extras.cf").c_str(), "r" );
258	assertf( extras, "cannot open extras.cf\n" );
259	parse( extras, LinkageSpec::BuiltinC );
260
261	if ( ! libcfap ) {
262	// read the prelude in, if not generating the cfa library
263	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
264	assertf( prelude, "cannot open prelude.cfa\n" );
265	parse( prelude, LinkageSpec::Intrinsic );
266
267	// Read to cfa builtins, if not generating the cfa library
268	FILE * builtins = fopen( (PreludeDirector + "/builtins.cf").c_str(), "r" );
269	assertf( builtins, "cannot open builtins.cf\n" );
270	parse( builtins, LinkageSpec::BuiltinCFA );
271	} // if
272	} // if
273
274	parse( input, libcfap ? LinkageSpec::Intrinsic : LinkageSpec::Cforall, yydebug );
275
276	if ( parsep ) {
277	parseTree->printList( cout );
278	delete parseTree;
279	return EXIT_SUCCESS;
280	} // if
281
282	buildList( parseTree, translationUnit );
283	delete parseTree;
284	parseTree = nullptr;
285
286	if ( astp ) {
287	dump( translationUnit );
288	return EXIT_SUCCESS;
289	} // if
290
291	// Temporary: fill locations after parsing so that every node has a location, for early error messages.
292	// Eventually we should pass the locations from the parser to every node, but this quick and dirty solution
293	// works okay for now.
294	CodeTools::fillLocations( translationUnit );
295	Stats::Time::StopBlock();
296
297	// add the assignment statement after the initialization of a type parameter
298	PASS( "Validate", SymTab::validate( translationUnit, symtabp ) );
299	if ( symtabp ) {
300	deleteAll( translationUnit );
301	return EXIT_SUCCESS;
302	} // if
303
304	if ( expraltp ) {
305	PassVisitor<ResolvExpr::AlternativePrinter> printer( cout );
306	acceptAll( translationUnit, printer );
307	return EXIT_SUCCESS;
308	} // if
309
310	if ( validp ) {
311	dump( translationUnit );
312	return EXIT_SUCCESS;
313	} // if
314
315	PASS( "Translate Throws", ControlStruct::translateThrows( translationUnit ) );
316	PASS( "Fix Labels", ControlStruct::fixLabels( translationUnit ) );
317	PASS( "Fix Names", CodeGen::fixNames( translationUnit ) );
318	PASS( "Gen Init", InitTweak::genInit( translationUnit ) );
319	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( translationUnit ) );
320	if ( libcfap ) {
321	// generate the bodies of cfa library functions
322	LibCfa::makeLibCfa( translationUnit );
323	} // if
324
325	if ( declstatsp ) {
326	CodeTools::printDeclStats( translationUnit );
327	deleteAll( translationUnit );
328	return EXIT_SUCCESS;
329	} // if
330
331	if ( bresolvep ) {
332	dump( translationUnit );
333	return EXIT_SUCCESS;
334	} // if
335
336	CodeTools::fillLocations( translationUnit );
337
338	if ( resolvprotop ) {
339	CodeTools::dumpAsResolvProto( translationUnit );
340	return EXIT_SUCCESS;
341	} // if
342
343	if( useNewAST ) {
344	if (Stats::Counters::enabled) {
345	ast::pass_visitor_stats.avg = Stats::Counters::build<Stats::Counters::AverageCounter<double>>("Average Depth - New");
346	ast::pass_visitor_stats.max = Stats::Counters::build<Stats::Counters::MaxCounter<double>>("Max depth - New");
347	}
348	auto transUnit = convert( move( translationUnit ) );
349	PASS( "Resolve", ResolvExpr::resolve( transUnit ) );
350	if ( exprp ) {
351	translationUnit = convert( move( transUnit ) );
352	dump( translationUnit );
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 ( ... ) {
448	exception_ptr eptr = current_exception();
449	try {
450	if (eptr) {
451	rethrow_exception(eptr);
452	} else {
453	cerr << "Exception Uncaught and Unknown" << endl;
454	} // if
455	} catch(const exception& e) {
456	cerr << "Uncaught Exception \"" << e.what() << "\"\n";
457	} // try
458	return EXIT_FAILURE;
459	} // try
460
461	deleteAll( translationUnit );
462	Stats::print();
463	return EXIT_SUCCESS;
464	} // main
465
466
467	static const char optstring[] = ":c:ghlLmNnpdOAP:S:twW:D:";
468
469	enum { PreludeDir = 128 };
470	static struct option long_opts[] = {
471	{ "colors", required_argument, nullptr, 'c' },
472	{ "gdb", no_argument, nullptr, 'g' },
473	{ "help", no_argument, nullptr, 'h' },
474	{ "libcfa", no_argument, nullptr, 'l' },
475	{ "linemarks", no_argument, nullptr, 'L' },
476	{ "no-main", no_argument, 0, 'm' },
477	{ "no-linemarks", no_argument, nullptr, 'N' },
478	{ "no-prelude", no_argument, nullptr, 'n' },
479	{ "prototypes", no_argument, nullptr, 'p' },
480	{ "deterministic-out", no_argument, nullptr, 'd' },
481	{ "old-ast", no_argument, nullptr, 'O'},
482	{ "new-ast", no_argument, nullptr, 'A'},
483	{ "print", required_argument, nullptr, 'P' },
484	{ "prelude-dir", required_argument, nullptr, PreludeDir },
485	{ "statistics", required_argument, nullptr, 'S' },
486	{ "tree", no_argument, nullptr, 't' },
487	{ "", no_argument, nullptr, 0 }, // -w
488	{ "", no_argument, nullptr, 0 }, // -W
489	{ "", no_argument, nullptr, 0 }, // -D
490	{ nullptr, 0, nullptr, 0 }
491	}; // long_opts
492
493	static const char * description[] = {
494	"diagnostic color: never, always, or auto.", // -c
495	"wait for gdb to attach", // -g
496	"print help message", // -h
497	"generate libcfa.c", // -l
498	"generate line marks", // -L
499	"do not replace main", // -m
500	"do not generate line marks", // -N
501	"do not read prelude", // -n
502	"generate prototypes for prelude functions", // -p
503	"only print deterministic output", // -d
504	"Use the old-ast", // -O
505	"Use the new-ast", // -A
506	"print", // -P
507	"<directory> prelude directory for debug/nodebug", // no flag
508	"<option-list> enable profiling information:\n counters,heap,time,all,none", // -S
509	"building cfa standard lib", // -t
510	"", // -w
511	"", // -W
512	"", // -D
513	}; // description
514
515	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
516
517	static struct Printopts {
518	const char * name;
519	int & flag;
520	int val;
521	const char * descript;
522	} printopts[] = {
523	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
524	{ "asterr", errorp, true, "print AST on error" },
525	{ "declstats", declstatsp, true, "code property statistics" },
526	{ "parse", yydebug, true, "yacc (parsing) debug information" },
527	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
528	{ "rproto", resolvprotop, true, "resolver-proto instance" },
529	{ "rsteps", resolvep, true, "print resolver steps" },
530	{ "tree", parsep, true, "print parse tree" },
531	// code dumps
532	{ "ast", astp, true, "print AST after parsing" },
533	{ "symevt", symtabp, true, "print AST after symbol table events" },
534	{ "altexpr", expraltp, true, "print alternatives for expressions" },
535	{ "astdecl", validp, true, "print AST after declaration validation pass" },
536	{ "resolver", bresolvep, true, "print AST before resolver step" },
537	{ "astexpr", exprp, true, "print AST after expression analysis" },
538	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
539	{ "tuple", tuplep, true, "print AST after tuple expansion" },
540	{ "astgen", genericsp, true, "print AST after instantiate generics" },
541	{ "box", bboxp, true, "print AST before box step" },
542	{ "codegen", bcodegenp, true, "print AST before code generation" },
543	};
544	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
545
546	static void usage( char *argv[] ) {
547	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
548	int i = 0, j = 1; // j skips starting colon
549	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
550	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
551	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
552	cout << " -" << optstring[j] << ",";
553	} else { // no flag
554	j -= 1; // compensate
555	cout << " ";
556	} // if
557	cout << " --" << left << setw(12) << long_opts[i].name << " ";
558	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
559	cout << "one of: " << endl;
560	for ( int i = 0; i < printoptsSize; i += 1 ) {
561	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
562	} // for
563	} else {
564	cout << description[i] << endl;
565	} // if
566	} // if
567	if ( optstring[j + 1] == ':' ) j += 1;
568	} // for
569	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
570	exit( EXIT_FAILURE );
571	} // usage
572
573	static void parse_cmdline( int argc, char * argv[] ) {
574	opterr = 0; // (global) prevent getopt from printing error messages
575
576	bool Wsuppress = false, Werror = false;
577	int c;
578	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
579	switch ( c ) {
580	case 'c': // diagnostic colors
581	if ( strcmp( optarg, "always" ) == 0 ) {
582	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
583	} else if ( strcmp( optarg, "never" ) == 0 ) {
584	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
585	} else if ( strcmp( optarg, "auto" ) == 0 ) {
586	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
587	} // if
588	break;
589	case 'h': // help message
590	usage( argv ); // no return
591	break;
592	case 'l': // generate libcfa.c
593	libcfap = true;
594	break;
595	case 'L': // generate line marks
596	linemarks = true;
597	break;
598	case 'm': // do not replace main
599	nomainp = true;
600	break;
601	case 'N': // do not generate line marks
602	linemarks = false;
603	break;
604	case 'n': // do not read prelude
605	nopreludep = true;
606	break;
607	case 'p': // generate prototypes for prelude functions
608	genproto = true;
609	break;
610	case 'd': // don't print non-deterministic output
611	deterministic_output = true;
612	break;
613	case 'O': // don't print non-deterministic output
614	useNewAST = false;
615	break;
616	case 'A': // don't print non-deterministic output
617	useNewAST = true;
618	break;
619	case 'P': // print options
620	for ( int i = 0;; i += 1 ) {
621	if ( i == printoptsSize ) {
622	cout << "Unknown --print option " << optarg << endl;
623	goto Default;
624	} // if
625	if ( strcmp( optarg, printopts[i].name ) == 0 ) {
626	printopts[i].flag = printopts[i].val;
627	break;
628	} // if
629	} // for
630	break;
631	case PreludeDir: // prelude directory for debug/nodebug, hidden
632	PreludeDirector = optarg;
633	break;
634	case 'S': // enable profiling information, argument comma separated list of names
635	Stats::parse_params( optarg );
636	break;
637	case 't': // building cfa stdlib
638	treep = true;
639	break;
640	case 'g': // wait for gdb
641	waiting_for_gdb = true;
642	break;
643	case 'w': // suppress all warnings, hidden
644	Wsuppress = true;
645	break;
646	case 'W': // coordinate gcc -W with CFA, hidden
647	if ( strcmp( optarg, "all" ) == 0 ) {
648	SemanticWarning_EnableAll();
649	} else if ( strcmp( optarg, "error" ) == 0 ) {
650	Werror = true;
651	} else {
652	char * warning = optarg;
653	Severity s;
654	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
655	warning += 3;
656	s = Severity::Suppress;
657	} else {
658	s = Severity::Warn;
659	} // if
660	SemanticWarning_Set( warning, s );
661	} // if
662	break;
663	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
664	break;
665	case '?': // unknown option
666	if ( optopt ) { // short option ?
667	cout << "Unknown option -" << (char)optopt << endl;
668	} else {
669	cout << "Unknown option " << argv[optind - 1] << endl;
670	} // if
671	goto Default;
672	case ':': // missing option
673	if ( optopt ) { // short option ?
674	cout << "Missing option for -" << (char)optopt << endl;
675	} else {
676	cout << "Missing option for " << argv[optind - 1] << endl;
677	} // if
678	goto Default;
679	Default:
680	default:
681	usage( argv ); // no return
682	} // switch
683	} // while
684
685	if ( Werror ) {
686	SemanticWarning_WarningAsError();
687	} // if
688	if ( Wsuppress ) {
689	SemanticWarning_SuppressAll();
690	} // if
691	// for ( const auto w : WarningFormats ) {
692	// cout << w.name << ' ' << (int)w.severity << endl;
693	// } // for
694	} // parse_cmdline
695
696	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit ) {
697	extern int yyparse( void );
698	extern FILE * yyin;
699	extern int yylineno;
700
701	::linkage = linkage; // set globals
702	yyin = input;
703	yylineno = 1;
704	int parseStatus = yyparse();
705
706	fclose( input );
707	if ( shouldExit \|\| parseStatus != 0 ) {
708	exit( parseStatus );
709	} // if
710	} // parse
711
712	static bool notPrelude( Declaration * decl ) {
713	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
714	} // notPrelude
715
716	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
717	list< Declaration * > decls;
718
719	if ( genproto ) {
720	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
721	} else {
722	decls = translationUnit;
723	} // if
724
725	// depending on commandline options, either generate code or dump the AST
726	if ( codegenp ) {
727	CodeGen::generate( decls, out, ! genproto, prettycodegenp );
728	} else {
729	printAll( decls, out );
730	} // if
731	deleteAll( translationUnit );
732	} // dump
733
734	// Local Variables: //
735	// tab-width: 4 //
736	// mode: c++ //
737	// compile-command: "make install" //
738	// End: //

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