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source: src/main.cc @ 93f74c0f

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

Last change on this file since 93f74c0f was aff7e86, checked in by Andrew Beach <ajbeach@…>, 3 years ago
Added a new attribute 'cfa_linkonce'.
Property mode set to `100644`
File size: 27.0 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 : 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 "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/ExceptTranslate.h" // for translateEHM
52	#include "ControlStruct/Mutate.h" // for mutate
53	#include "GenPoly/Box.h" // for box
54	#include "GenPoly/InstantiateGeneric.h" // for instantiateGeneric
55	#include "GenPoly/Lvalue.h" // for convertLvalue
56	#include "GenPoly/Specialize.h" // for convertSpecializations
57	#include "InitTweak/FixInit.h" // for fix
58	#include "InitTweak/GenInit.h" // for genInit
59	#include "MakeLibCfa.h" // for makeLibCfa
60	#include "Parser/ParseNode.h" // for DeclarationNode, buildList
61	#include "Parser/TypedefTable.h" // for TypedefTable
62	#include "ResolvExpr/AlternativePrinter.h" // for AlternativePrinter
63	#include "ResolvExpr/Resolver.h" // for resolve
64	#include "SymTab/Validate.h" // for validate
65	#include "SynTree/LinkageSpec.h" // for Spec, Cforall, Intrinsic
66	#include "SynTree/Declaration.h" // for Declaration
67	#include "SynTree/Visitor.h" // for acceptAll
68	#include "Tuples/Tuples.h" // for expandMemberTuples, expan...
69	#include "Virtual/ExpandCasts.h" // for expandCasts
70
71
72	static void NewPass( const char * const name ) {
73	Stats::Heap::newPass( name );
74	using namespace Stats::Counters;
75	{
76	static auto group = build<CounterGroup>( "Pass Visitor" );
77	auto pass = build<CounterGroup>( name, group );
78	pass_visitor_stats.depth = 0;
79	pass_visitor_stats.avg = build<AverageCounter<double>>( "Average Depth", pass );
80	pass_visitor_stats.max = build<MaxCounter<double>>( "Max Depth", pass );
81	}
82	{
83	static auto group = build<CounterGroup>( "Syntax Node" );
84	auto pass = build<CounterGroup>( name, group );
85	BaseSyntaxNode::new_nodes = build<SimpleCounter>( "Allocs", pass );
86	}
87	}
88
89	#define PASS( name, pass ) \
90	if ( errorp ) { cerr << name << endl; } \
91	NewPass(name); \
92	Stats::Time::StartBlock(name); \
93	pass; \
94	Stats::Time::StopBlock();
95
96	LinkageSpec::Spec linkage = LinkageSpec::Cforall;
97	TypedefTable typedefTable;
98	DeclarationNode * parseTree = nullptr; // program parse tree
99
100	static bool waiting_for_gdb = false; // flag to set cfa-cpp to wait for gdb on start
101
102	static string PreludeDirector = "";
103
104	static void parse_cmdline( int argc, char * argv[] );
105	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit = false );
106	static void dump( list< Declaration * > & translationUnit, ostream & out = cout );
107	static void dump( ast::TranslationUnit && transUnit, ostream & out = cout );
108
109	static void backtrace( int start ) { // skip first N stack frames
110	enum { Frames = 50, }; // maximum number of stack frames
111	void * array[Frames];
112	size_t size = ::backtrace( array, Frames );
113	char ** messages = ::backtrace_symbols( array, size ); // does not demangle names
114
115	*index( messages[0], '(' ) = '\0'; // find executable name
116	cerr << "Stack back trace for: " << messages[0] << endl;
117
118	// skip last 2 stack frames after main
119	for ( unsigned int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
120	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
121
122	for ( char * p = messages[i]; *p; p += 1 ) { // find parantheses and +offset
123	if ( *p == '(' ) {
124	mangled_name = p;
125	} else if ( *p == '+' ) {
126	offset_begin = p;
127	} else if ( *p == ')' ) {
128	offset_end = p;
129	break;
130	} // if
131	} // for
132
133	// if line contains symbol, attempt to demangle
134	int frameNo = i - start;
135	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
136	*mangled_name++ = '\0'; // delimit strings
137	*offset_begin++ = '\0';
138	*offset_end++ = '\0';
139
140	int status;
141	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
142	// bug in __cxa_demangle for single-character lower-case non-mangled names
143	if ( status == 0 ) { // demangling successful ?
144	cerr << "(" << frameNo << ") " << messages[i] << " : "
145	<< real_name << "+" << offset_begin << offset_end << endl;
146	} else { // otherwise, output mangled name
147	cerr << "(" << frameNo << ") " << messages[i] << " : "
148	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
149	} // if
150
151	free( real_name );
152	} else { // otherwise, print the whole line
153	cerr << "(" << frameNo << ") " << messages[i] << endl;
154	} // if
155	} // for
156
157	free( messages );
158	} // backtrace
159
160	#define SIGPARMS int sig __attribute__(( unused )), siginfo_t * sfp __attribute__(( unused )), ucontext_t * cxt __attribute__(( unused ))
161
162	static void Signal( int sig, void (* handler)(SIGPARMS), int flags ) {
163	struct sigaction act;
164
165	act.sa_sigaction = (void ()(int, siginfo_t , void *))handler;
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	} // Signal
173
174	static void sigSegvBusHandler( SIGPARMS ) {
175	if ( sfp->si_addr == nullptr ) {
176	cerr << "Null pointer (nullptr) dereference." << endl;
177	} else {
178	cerr << (sig == SIGSEGV ? "Segment fault" : "Bus error") << " at memory location " << sfp->si_addr << "." << endl
179	<< "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;
180	} // if
181	backtrace( 2 ); // skip first 2 stack frames
182	abort(); // cause core dump for debugging
183	} // sigSegvBusHandler
184
185	static void sigFpeHandler( SIGPARMS ) {
186	const char * msg;
187
188	switch ( sfp->si_code ) {
189	case FPE_INTDIV: case FPE_FLTDIV: msg = "divide by zero"; break;
190	case FPE_FLTOVF: msg = "overflow"; break;
191	case FPE_FLTUND: msg = "underflow"; break;
192	case FPE_FLTRES: msg = "inexact result"; break;
193	case FPE_FLTINV: msg = "invalid operation"; break;
194	default: msg = "unknown";
195	} // choose
196	cerr << "Computation error " << msg << " at location " << sfp->si_addr << endl
197	<< "Possible cause is constant-expression evaluation invalid." << endl;
198	backtrace( 2 ); // skip first 2 stack frames
199	abort(); // cause core dump for debugging
200	} // sigFpeHandler
201
202	static void sigAbortHandler( SIGPARMS ) {
203	backtrace( 6 ); // skip first 6 stack frames
204	Signal( SIGABRT, (void (*)(SIGPARMS))SIG_DFL, SA_SIGINFO ); // reset default signal handler
205	raise( SIGABRT ); // reraise SIGABRT
206	} // sigAbortHandler
207
208	int main( int argc, char * argv[] ) {
209	FILE * input; // use FILE rather than istream because yyin is FILE
210	ostream * output = & cout;
211	list< Declaration * > translationUnit;
212
213	Signal( SIGSEGV, sigSegvBusHandler, SA_SIGINFO );
214	Signal( SIGBUS, sigSegvBusHandler, SA_SIGINFO );
215	Signal( SIGFPE, sigFpeHandler, SA_SIGINFO );
216	Signal( SIGABRT, sigAbortHandler, SA_SIGINFO );
217
218	// cout << "main" << endl;
219	// for ( int i = 0; i < argc; i += 1 ) {
220	// cout << '\t' << argv[i] << endl;
221	// } // for
222
223	parse_cmdline( argc, argv ); // process command-line arguments
224	CodeGen::FixMain::setReplaceMain( !nomainp );
225
226	if ( waiting_for_gdb ) {
227	cerr << "Waiting for gdb" << endl;
228	cerr << "run :" << endl;
229	cerr << " gdb attach " << getpid() << endl;
230	raise(SIGSTOP);
231	} // if
232
233	try {
234	// choose to read the program from a file or stdin
235	if ( optind < argc ) { // any commands after the flags ? => input file name
236	input = fopen( argv[ optind ], "r" );
237	assertf( input, "cannot open %s because %s\n", argv[ optind ], strerror( errno ) );
238	optind += 1;
239	} else { // no input file name
240	input = stdin;
241	} // if
242
243	Stats::Time::StartGlobal();
244	NewPass("Parse");
245	Stats::Time::StartBlock("Parse");
246
247	// read in the builtins, extras, and the prelude
248	if ( ! nopreludep ) { // include gcc builtins
249	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
250
251	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
252
253	// Read to gcc builtins, if not generating the cfa library
254	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cf").c_str(), "r" );
255	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
256	parse( gcc_builtins, LinkageSpec::Compiler );
257
258	// read the extra prelude in, if not generating the cfa library
259	FILE * extras = fopen( (PreludeDirector + "/extras.cf").c_str(), "r" );
260	assertf( extras, "cannot open extras.cf\n" );
261	parse( extras, LinkageSpec::BuiltinC );
262
263	if ( ! libcfap ) {
264	// read the prelude in, if not generating the cfa library
265	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
266	assertf( prelude, "cannot open prelude.cfa\n" );
267	parse( prelude, LinkageSpec::Intrinsic );
268
269	// Read to cfa builtins, if not generating the cfa library
270	FILE * builtins = fopen( (PreludeDirector + "/builtins.cf").c_str(), "r" );
271	assertf( builtins, "cannot open builtins.cf\n" );
272	parse( builtins, LinkageSpec::BuiltinCFA );
273	} // if
274	} // if
275
276	parse( input, libcfap ? LinkageSpec::Intrinsic : LinkageSpec::Cforall, yydebug );
277
278	if ( parsep ) {
279	parseTree->printList( cout );
280	delete parseTree;
281	return EXIT_SUCCESS;
282	} // if
283
284	buildList( parseTree, translationUnit );
285	delete parseTree;
286	parseTree = nullptr;
287
288	if ( astp ) {
289	dump( translationUnit );
290	return EXIT_SUCCESS;
291	} // if
292
293	// Temporary: fill locations after parsing so that every node has a location, for early error messages.
294	// Eventually we should pass the locations from the parser to every node, but this quick and dirty solution
295	// works okay for now.
296	CodeTools::fillLocations( translationUnit );
297	Stats::Time::StopBlock();
298
299	// add the assignment statement after the initialization of a type parameter
300	PASS( "Validate", SymTab::validate( translationUnit, symtabp ) );
301	if ( symtabp ) {
302	deleteAll( translationUnit );
303	return EXIT_SUCCESS;
304	} // if
305
306	if ( expraltp ) {
307	PassVisitor<ResolvExpr::AlternativePrinter> printer( cout );
308	acceptAll( translationUnit, printer );
309	return EXIT_SUCCESS;
310	} // if
311
312	if ( validp ) {
313	dump( translationUnit );
314	return EXIT_SUCCESS;
315	} // if
316
317	PASS( "Translate Throws", ControlStruct::translateThrows( translationUnit ) );
318	PASS( "Fix Labels", ControlStruct::fixLabels( translationUnit ) );
319	PASS( "Fix Names", CodeGen::fixNames( translationUnit ) );
320	PASS( "Gen Init", InitTweak::genInit( translationUnit ) );
321	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( translationUnit ) );
322	if ( libcfap ) {
323	// generate the bodies of cfa library functions
324	LibCfa::makeLibCfa( translationUnit );
325	} // if
326
327	if ( declstatsp ) {
328	CodeTools::printDeclStats( translationUnit );
329	deleteAll( translationUnit );
330	return EXIT_SUCCESS;
331	} // if
332
333	if ( bresolvep ) {
334	dump( translationUnit );
335	return EXIT_SUCCESS;
336	} // if
337
338	CodeTools::fillLocations( translationUnit );
339
340	if ( resolvprotop ) {
341	CodeTools::dumpAsResolvProto( translationUnit );
342	return EXIT_SUCCESS;
343	} // if
344
345	if( useNewAST ) {
346	if (Stats::Counters::enabled) {
347	ast::pass_visitor_stats.avg = Stats::Counters::build<Stats::Counters::AverageCounter<double>>("Average Depth - New");
348	ast::pass_visitor_stats.max = Stats::Counters::build<Stats::Counters::MaxCounter<double>>("Max depth - New");
349	}
350	auto transUnit = convert( move( translationUnit ) );
351	PASS( "Resolve", ResolvExpr::resolve( transUnit ) );
352	if ( exprp ) {
353	dump( move( transUnit ) );
354	return EXIT_SUCCESS;
355	} // if
356
357	forceFillCodeLocations( transUnit );
358
359	PASS( "Fix Init", InitTweak::fix(transUnit, buildingLibrary()));
360	translationUnit = convert( move( transUnit ) );
361	} else {
362	PASS( "Resolve", ResolvExpr::resolve( translationUnit ) );
363	if ( exprp ) {
364	dump( translationUnit );
365	return EXIT_SUCCESS;
366	}
367
368	PASS( "Fix Init", InitTweak::fix( translationUnit, buildingLibrary() ) );
369	}
370
371	// fix ObjectDecl - replaces ConstructorInit nodes
372	if ( ctorinitp ) {
373	dump ( translationUnit );
374	return EXIT_SUCCESS;
375	} // if
376
377	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
378
379	PASS( "Translate Tries" , ControlStruct::translateTries( translationUnit ) );
380
381	PASS( "Gen Waitfor" , Concurrency::generateWaitFor( translationUnit ) );
382
383	PASS( "Convert Specializations", GenPoly::convertSpecializations( translationUnit ) ); // needs to happen before tuple types are expanded
384
385	PASS( "Expand Tuples", Tuples::expandTuples( translationUnit ) ); // xxx - is this the right place for this?
386
387	if ( tuplep ) {
388	dump( translationUnit );
389	return EXIT_SUCCESS;
390	} // if
391
392	PASS( "Virtual Expand Casts", Virtual::expandCasts( translationUnit ) ); // Must come after translateEHM
393
394	PASS( "Instantiate Generics", GenPoly::instantiateGeneric( translationUnit ) );
395	if ( genericsp ) {
396	dump( translationUnit );
397	return EXIT_SUCCESS;
398	} // if
399
400	PASS( "Convert L-Value", GenPoly::convertLvalue( translationUnit ) );
401
402	if ( bboxp ) {
403	dump( translationUnit );
404	return EXIT_SUCCESS;
405	} // if
406	PASS( "Box", GenPoly::box( translationUnit ) );
407
408	PASS( "Link-Once", CodeGen::translateLinkOnce( translationUnit ) );
409
410	// Code has been lowered to C, now we can start generation.
411
412	if ( bcodegenp ) {
413	dump( translationUnit );
414	return EXIT_SUCCESS;
415	} // if
416
417	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
418	output = new ofstream( argv[ optind ] );
419	} // if
420
421	CodeTools::fillLocations( translationUnit );
422	PASS( "Code Gen", CodeGen::generate( translationUnit, *output, ! genproto, prettycodegenp, true, linemarks ) );
423
424	CodeGen::FixMain::fix( *output, (PreludeDirector + "/bootloader.c").c_str() );
425	if ( output != &cout ) {
426	delete output;
427	} // if
428	} catch ( SemanticErrorException & e ) {
429	if ( errorp ) {
430	cerr << "---AST at error:---" << endl;
431	dump( translationUnit, cerr );
432	cerr << endl << "---End of AST, begin error message:---\n" << endl;
433	} // if
434	e.print();
435	if ( output != &cout ) {
436	delete output;
437	} // if
438	return EXIT_FAILURE;
439	} catch ( UnimplementedError & e ) {
440	cout << "Sorry, " << e.get_what() << " is not currently implemented" << endl;
441	if ( output != &cout ) {
442	delete output;
443	} // if
444	return EXIT_FAILURE;
445	} catch ( CompilerError & e ) {
446	cerr << "Compiler Error: " << e.get_what() << endl;
447	cerr << "(please report bugs to [REDACTED])" << endl;
448	if ( output != &cout ) {
449	delete output;
450	} // if
451	return EXIT_FAILURE;
452	} catch ( std::bad_alloc & ) {
453	cerr << "cfa-cpp compilation error std::bad_alloc" << endl;
454	backtrace( 1 );
455	abort();
456	} catch ( ... ) {
457	exception_ptr eptr = current_exception();
458	try {
459	if (eptr) {
460	rethrow_exception(eptr);
461	} else {
462	cerr << "cfa-cpp compilation error exception uncaught and unknown" << endl;
463	} // if
464	} catch( const exception & e ) {
465	cerr << "cfa-cpp compilation error uncaught exception \"" << e.what() << "\"\n";
466	} // try
467	return EXIT_FAILURE;
468	} // try
469
470	deleteAll( translationUnit );
471	Stats::print();
472	return EXIT_SUCCESS;
473	} // main
474
475
476	static const char optstring[] = ":c:ghlLmNnpdOAP:S:twW:D:";
477
478	enum { PreludeDir = 128 };
479	static struct option long_opts[] = {
480	{ "colors", required_argument, nullptr, 'c' },
481	{ "gdb", no_argument, nullptr, 'g' },
482	{ "help", no_argument, nullptr, 'h' },
483	{ "libcfa", no_argument, nullptr, 'l' },
484	{ "linemarks", no_argument, nullptr, 'L' },
485	{ "no-main", no_argument, 0, 'm' },
486	{ "no-linemarks", no_argument, nullptr, 'N' },
487	{ "no-prelude", no_argument, nullptr, 'n' },
488	{ "prototypes", no_argument, nullptr, 'p' },
489	{ "deterministic-out", no_argument, nullptr, 'd' },
490	{ "old-ast", no_argument, nullptr, 'O'},
491	{ "new-ast", no_argument, nullptr, 'A'},
492	{ "print", required_argument, nullptr, 'P' },
493	{ "prelude-dir", required_argument, nullptr, PreludeDir },
494	{ "statistics", required_argument, nullptr, 'S' },
495	{ "tree", no_argument, nullptr, 't' },
496	{ "", no_argument, nullptr, 0 }, // -w
497	{ "", no_argument, nullptr, 0 }, // -W
498	{ "", no_argument, nullptr, 0 }, // -D
499	{ nullptr, 0, nullptr, 0 }
500	}; // long_opts
501
502	static const char * description[] = {
503	"diagnostic color: never, always, auto", // -c
504	"wait for gdb to attach", // -g
505	"print translator help message", // -h
506	"generate libcfa.c", // -l
507	"generate line marks", // -L
508	"do not replace main", // -m
509	"do not generate line marks", // -N
510	"do not read prelude", // -n
511	"do not generate prelude prototypes => prelude not printed", // -p
512	"only print deterministic output", // -d
513	"Use the old-ast", // -O
514	"Use the new-ast", // -A
515	"print", // -P
516	"<directory> prelude directory for debug/nodebug", // no flag
517	"<option-list> enable profiling information: counters, heap, time, all, none", // -S
518	"building cfa standard lib", // -t
519	"", // -w
520	"", // -W
521	"", // -D
522	}; // description
523
524	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
525
526	static struct Printopts {
527	const char * name;
528	int & flag;
529	int val;
530	const char * descript;
531	} printopts[] = {
532	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
533	{ "asterr", errorp, true, "print AST on error" },
534	{ "declstats", declstatsp, true, "code property statistics" },
535	{ "parse", yydebug, true, "yacc (parsing) debug information" },
536	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
537	{ "rproto", resolvprotop, true, "resolver-proto instance" },
538	{ "rsteps", resolvep, true, "print resolver steps" },
539	{ "tree", parsep, true, "print parse tree" },
540	// code dumps
541	{ "ast", astp, true, "print AST after parsing" },
542	{ "symevt", symtabp, true, "print AST after symbol table events" },
543	{ "altexpr", expraltp, true, "print alternatives for expressions" },
544	{ "astdecl", validp, true, "print AST after declaration validation pass" },
545	{ "resolver", bresolvep, true, "print AST before resolver step" },
546	{ "astexpr", exprp, true, "print AST after expression analysis" },
547	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
548	{ "tuple", tuplep, true, "print AST after tuple expansion" },
549	{ "astgen", genericsp, true, "print AST after instantiate generics" },
550	{ "box", bboxp, true, "print AST before box step" },
551	{ "codegen", bcodegenp, true, "print AST before code generation" },
552	};
553	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
554
555	static void usage( char * argv[] ) {
556	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
557	int i = 0, j = 1; // j skips starting colon
558	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
559	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
560	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
561	cout << " -" << optstring[j] << ",";
562	} else { // no flag
563	j -= 1; // compensate
564	cout << " ";
565	} // if
566	cout << " --" << left << setw(12) << long_opts[i].name << " ";
567	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
568	cout << "one of: " << endl;
569	for ( int i = 0; i < printoptsSize; i += 1 ) {
570	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
571	} // for
572	} else {
573	cout << description[i] << endl;
574	} // if
575	} // if
576	if ( optstring[j + 1] == ':' ) j += 1;
577	} // for
578	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
579	exit( EXIT_FAILURE );
580	} // usage
581
582	static void parse_cmdline( int argc, char * argv[] ) {
583	opterr = 0; // (global) prevent getopt from printing error messages
584
585	bool Wsuppress = false, Werror = false;
586	int c;
587	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
588	switch ( c ) {
589	case 'c': // diagnostic colors
590	if ( strcmp( optarg, "always" ) == 0 ) {
591	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
592	} else if ( strcmp( optarg, "never" ) == 0 ) {
593	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
594	} else if ( strcmp( optarg, "auto" ) == 0 ) {
595	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
596	} // if
597	break;
598	case 'h': // help message
599	usage( argv ); // no return
600	break;
601	case 'l': // generate libcfa.c
602	libcfap = true;
603	break;
604	case 'L': // generate line marks
605	linemarks = true;
606	break;
607	case 'm': // do not replace main
608	nomainp = true;
609	break;
610	case 'N': // do not generate line marks
611	linemarks = false;
612	break;
613	case 'n': // do not read prelude
614	nopreludep = true;
615	break;
616	case 'p': // generate prototypes for prelude functions
617	genproto = true;
618	break;
619	case 'd': // don't print non-deterministic output
620	deterministic_output = true;
621	break;
622	case 'O': // don't print non-deterministic output
623	useNewAST = false;
624	break;
625	case 'A': // don't print non-deterministic output
626	useNewAST = true;
627	break;
628	case 'P': // print options
629	for ( int i = 0;; i += 1 ) {
630	if ( i == printoptsSize ) {
631	cout << "Unknown --print option " << optarg << endl;
632	goto Default;
633	} // if
634	if ( strcmp( optarg, printopts[i].name ) == 0 ) {
635	printopts[i].flag = printopts[i].val;
636	break;
637	} // if
638	} // for
639	break;
640	case PreludeDir: // prelude directory for debug/nodebug, hidden
641	PreludeDirector = optarg;
642	break;
643	case 'S': // enable profiling information, argument comma separated list of names
644	Stats::parse_params( optarg );
645	break;
646	case 't': // building cfa stdlib
647	treep = true;
648	break;
649	case 'g': // wait for gdb
650	waiting_for_gdb = true;
651	break;
652	case 'w': // suppress all warnings, hidden
653	Wsuppress = true;
654	break;
655	case 'W': // coordinate gcc -W with CFA, hidden
656	if ( strcmp( optarg, "all" ) == 0 ) {
657	SemanticWarning_EnableAll();
658	} else if ( strcmp( optarg, "error" ) == 0 ) {
659	Werror = true;
660	} else {
661	char * warning = optarg;
662	Severity s;
663	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
664	warning += 3;
665	s = Severity::Suppress;
666	} else {
667	s = Severity::Warn;
668	} // if
669	SemanticWarning_Set( warning, s );
670	} // if
671	break;
672	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
673	break;
674	case '?': // unknown option
675	if ( optopt ) { // short option ?
676	cout << "Unknown option -" << (char)optopt << endl;
677	} else {
678	cout << "Unknown option " << argv[optind - 1] << endl;
679	} // if
680	goto Default;
681	case ':': // missing option
682	if ( optopt ) { // short option ?
683	cout << "Missing option for -" << (char)optopt << endl;
684	} else {
685	cout << "Missing option for " << argv[optind - 1] << endl;
686	} // if
687	goto Default;
688	Default:
689	default:
690	usage( argv ); // no return
691	} // switch
692	} // while
693
694	if ( Werror ) {
695	SemanticWarning_WarningAsError();
696	} // if
697	if ( Wsuppress ) {
698	SemanticWarning_SuppressAll();
699	} // if
700	// for ( const auto w : WarningFormats ) {
701	// cout << w.name << ' ' << (int)w.severity << endl;
702	// } // for
703	} // parse_cmdline
704
705	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit ) {
706	extern int yyparse( void );
707	extern FILE * yyin;
708	extern int yylineno;
709
710	::linkage = linkage; // set globals
711	yyin = input;
712	yylineno = 1;
713	int parseStatus = yyparse();
714
715	fclose( input );
716	if ( shouldExit \|\| parseStatus != 0 ) {
717	exit( parseStatus );
718	} // if
719	} // parse
720
721	static bool notPrelude( Declaration * decl ) {
722	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
723	} // notPrelude
724
725	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
726	list< Declaration * > decls;
727
728	if ( genproto ) {
729	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
730	} else {
731	decls = translationUnit;
732	} // if
733
734	// depending on commandline options, either generate code or dump the AST
735	if ( codegenp ) {
736	CodeGen::generate( decls, out, ! genproto, prettycodegenp );
737	} else {
738	printAll( decls, out );
739	} // if
740	deleteAll( translationUnit );
741	} // dump
742
743	static void dump( ast::TranslationUnit && transUnit, ostream & out ) {
744	std::list< Declaration * > translationUnit = convert( move( transUnit ) );
745	dump( translationUnit, out );
746	}
747
748	// Local Variables: //
749	// tab-width: 4 //
750	// mode: c++ //
751	// compile-command: "make install" //
752	// End: //

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