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source: src/main.cc @ 4ae968e

ADTast-experimentalenumforall-pointer-decayjacob/cs343-translationnew-ast-unique-exprpthread-emulationqualifiedEnum

Last change on this file since 4ae968e was 1f68d5d, checked in by Thierry Delisle <tdelisle@…>, 3 years ago
Changed signal handling to avoid incompatible pointer cast
Property mode set to `100644`
File size: 27.2 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(struct sigaction & act, int sig, int flags ) {
163	act.sa_flags = flags;
164
165	if ( sigaction( sig, &act, nullptr ) == -1 ) {
166	cerr << "cfa-cpp compilation error problem installing signal handler, error(" << errno << ") " << strerror( errno ) << endl;
167	_exit( EXIT_FAILURE );
168	} // if
169	}
170
171	static void Signal( int sig, void (* handler)(SIGPARMS), int flags ) {
172	struct sigaction act;
173	act.sa_sigaction = (void ()(int, siginfo_t , void *))handler;
174	_Signal(act, sig, flags);
175	} // Signal
176
177	static void Signal( int sig, void (* handler)(int), int flags ) {
178	struct sigaction act;
179	act.sa_handler = handler;
180	_Signal(act, sig, flags);
181	} // Signal
182
183	static void sigSegvBusHandler( SIGPARMS ) {
184	if ( sfp->si_addr == nullptr ) {
185	cerr << "Null pointer (nullptr) dereference." << endl;
186	} else {
187	cerr << (sig == SIGSEGV ? "Segment fault" : "Bus error") << " at memory location " << sfp->si_addr << "." << endl
188	<< "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;
189	} // if
190	backtrace( 2 ); // skip first 2 stack frames
191	abort(); // cause core dump for debugging
192	} // sigSegvBusHandler
193
194	static void sigFpeHandler( SIGPARMS ) {
195	const char * msg;
196
197	switch ( sfp->si_code ) {
198	case FPE_INTDIV: case FPE_FLTDIV: msg = "divide by zero"; break;
199	case FPE_FLTOVF: msg = "overflow"; break;
200	case FPE_FLTUND: msg = "underflow"; break;
201	case FPE_FLTRES: msg = "inexact result"; break;
202	case FPE_FLTINV: msg = "invalid operation"; break;
203	default: msg = "unknown";
204	} // choose
205	cerr << "Computation error " << msg << " at location " << sfp->si_addr << endl
206	<< "Possible cause is constant-expression evaluation invalid." << endl;
207	backtrace( 2 ); // skip first 2 stack frames
208	abort(); // cause core dump for debugging
209	} // sigFpeHandler
210
211	static void sigAbortHandler( SIGPARMS ) {
212	backtrace( 6 ); // skip first 6 stack frames
213	Signal( SIGABRT, SIG_DFL, SA_SIGINFO ); // reset default signal handler
214	raise( SIGABRT ); // reraise SIGABRT
215	} // sigAbortHandler
216
217	int main( int argc, char * argv[] ) {
218	FILE * input; // use FILE rather than istream because yyin is FILE
219	ostream * output = & cout;
220	list< Declaration * > translationUnit;
221
222	Signal( SIGSEGV, sigSegvBusHandler, SA_SIGINFO );
223	Signal( SIGBUS, sigSegvBusHandler, SA_SIGINFO );
224	Signal( SIGFPE, sigFpeHandler, SA_SIGINFO );
225	Signal( SIGABRT, sigAbortHandler, SA_SIGINFO );
226
227	// cout << "main" << endl;
228	// for ( int i = 0; i < argc; i += 1 ) {
229	// cout << '\t' << argv[i] << endl;
230	// } // for
231
232	parse_cmdline( argc, argv ); // process command-line arguments
233	CodeGen::FixMain::setReplaceMain( !nomainp );
234
235	if ( waiting_for_gdb ) {
236	cerr << "Waiting for gdb" << endl;
237	cerr << "run :" << endl;
238	cerr << " gdb attach " << getpid() << endl;
239	raise(SIGSTOP);
240	} // if
241
242	try {
243	// choose to read the program from a file or stdin
244	if ( optind < argc ) { // any commands after the flags ? => input file name
245	input = fopen( argv[ optind ], "r" );
246	assertf( input, "cannot open %s because %s\n", argv[ optind ], strerror( errno ) );
247	optind += 1;
248	} else { // no input file name
249	input = stdin;
250	} // if
251
252	Stats::Time::StartGlobal();
253	NewPass("Parse");
254	Stats::Time::StartBlock("Parse");
255
256	// read in the builtins, extras, and the prelude
257	if ( ! nopreludep ) { // include gcc builtins
258	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
259
260	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
261
262	// Read to gcc builtins, if not generating the cfa library
263	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cf").c_str(), "r" );
264	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
265	parse( gcc_builtins, LinkageSpec::Compiler );
266
267	// read the extra prelude in, if not generating the cfa library
268	FILE * extras = fopen( (PreludeDirector + "/extras.cf").c_str(), "r" );
269	assertf( extras, "cannot open extras.cf\n" );
270	parse( extras, LinkageSpec::BuiltinC );
271
272	if ( ! libcfap ) {
273	// read the prelude in, if not generating the cfa library
274	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
275	assertf( prelude, "cannot open prelude.cfa\n" );
276	parse( prelude, LinkageSpec::Intrinsic );
277
278	// Read to cfa builtins, if not generating the cfa library
279	FILE * builtins = fopen( (PreludeDirector + "/builtins.cf").c_str(), "r" );
280	assertf( builtins, "cannot open builtins.cf\n" );
281	parse( builtins, LinkageSpec::BuiltinCFA );
282	} // if
283	} // if
284
285	parse( input, libcfap ? LinkageSpec::Intrinsic : LinkageSpec::Cforall, yydebug );
286
287	if ( parsep ) {
288	parseTree->printList( cout );
289	delete parseTree;
290	return EXIT_SUCCESS;
291	} // if
292
293	buildList( parseTree, translationUnit );
294	delete parseTree;
295	parseTree = nullptr;
296
297	if ( astp ) {
298	dump( translationUnit );
299	return EXIT_SUCCESS;
300	} // if
301
302	// Temporary: fill locations after parsing so that every node has a location, for early error messages.
303	// Eventually we should pass the locations from the parser to every node, but this quick and dirty solution
304	// works okay for now.
305	CodeTools::fillLocations( translationUnit );
306	Stats::Time::StopBlock();
307
308	// add the assignment statement after the initialization of a type parameter
309	PASS( "Validate", SymTab::validate( translationUnit, symtabp ) );
310	if ( symtabp ) {
311	deleteAll( translationUnit );
312	return EXIT_SUCCESS;
313	} // if
314
315	if ( expraltp ) {
316	PassVisitor<ResolvExpr::AlternativePrinter> printer( cout );
317	acceptAll( translationUnit, printer );
318	return EXIT_SUCCESS;
319	} // if
320
321	if ( validp ) {
322	dump( translationUnit );
323	return EXIT_SUCCESS;
324	} // if
325
326	PASS( "Translate Throws", ControlStruct::translateThrows( translationUnit ) );
327	PASS( "Fix Labels", ControlStruct::fixLabels( translationUnit ) );
328	PASS( "Fix Names", CodeGen::fixNames( translationUnit ) );
329	PASS( "Gen Init", InitTweak::genInit( translationUnit ) );
330	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( translationUnit ) );
331	if ( libcfap ) {
332	// generate the bodies of cfa library functions
333	LibCfa::makeLibCfa( translationUnit );
334	} // if
335
336	if ( declstatsp ) {
337	CodeTools::printDeclStats( translationUnit );
338	deleteAll( translationUnit );
339	return EXIT_SUCCESS;
340	} // if
341
342	if ( bresolvep ) {
343	dump( translationUnit );
344	return EXIT_SUCCESS;
345	} // if
346
347	CodeTools::fillLocations( translationUnit );
348
349	if ( resolvprotop ) {
350	CodeTools::dumpAsResolvProto( translationUnit );
351	return EXIT_SUCCESS;
352	} // if
353
354	if( useNewAST ) {
355	if (Stats::Counters::enabled) {
356	ast::pass_visitor_stats.avg = Stats::Counters::build<Stats::Counters::AverageCounter<double>>("Average Depth - New");
357	ast::pass_visitor_stats.max = Stats::Counters::build<Stats::Counters::MaxCounter<double>>("Max depth - New");
358	}
359	auto transUnit = convert( move( translationUnit ) );
360	PASS( "Resolve", ResolvExpr::resolve( transUnit ) );
361	if ( exprp ) {
362	dump( move( transUnit ) );
363	return EXIT_SUCCESS;
364	} // if
365
366	forceFillCodeLocations( transUnit );
367
368	PASS( "Fix Init", InitTweak::fix(transUnit, buildingLibrary()));
369	translationUnit = convert( move( transUnit ) );
370	} else {
371	PASS( "Resolve", ResolvExpr::resolve( translationUnit ) );
372	if ( exprp ) {
373	dump( translationUnit );
374	return EXIT_SUCCESS;
375	}
376
377	PASS( "Fix Init", InitTweak::fix( translationUnit, buildingLibrary() ) );
378	}
379
380	// fix ObjectDecl - replaces ConstructorInit nodes
381	if ( ctorinitp ) {
382	dump ( translationUnit );
383	return EXIT_SUCCESS;
384	} // if
385
386	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
387
388	PASS( "Translate Tries" , ControlStruct::translateTries( translationUnit ) );
389
390	PASS( "Gen Waitfor" , Concurrency::generateWaitFor( translationUnit ) );
391
392	PASS( "Convert Specializations", GenPoly::convertSpecializations( translationUnit ) ); // needs to happen before tuple types are expanded
393
394	PASS( "Expand Tuples", Tuples::expandTuples( translationUnit ) ); // xxx - is this the right place for this?
395
396	if ( tuplep ) {
397	dump( translationUnit );
398	return EXIT_SUCCESS;
399	} // if
400
401	PASS( "Virtual Expand Casts", Virtual::expandCasts( translationUnit ) ); // Must come after translateEHM
402
403	PASS( "Instantiate Generics", GenPoly::instantiateGeneric( translationUnit ) );
404	if ( genericsp ) {
405	dump( translationUnit );
406	return EXIT_SUCCESS;
407	} // if
408
409	PASS( "Convert L-Value", GenPoly::convertLvalue( translationUnit ) );
410
411	if ( bboxp ) {
412	dump( translationUnit );
413	return EXIT_SUCCESS;
414	} // if
415	PASS( "Box", GenPoly::box( translationUnit ) );
416
417	PASS( "Link-Once", CodeGen::translateLinkOnce( translationUnit ) );
418
419	// Code has been lowered to C, now we can start generation.
420
421	if ( bcodegenp ) {
422	dump( translationUnit );
423	return EXIT_SUCCESS;
424	} // if
425
426	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
427	output = new ofstream( argv[ optind ] );
428	} // if
429
430	CodeTools::fillLocations( translationUnit );
431	PASS( "Code Gen", CodeGen::generate( translationUnit, *output, ! genproto, prettycodegenp, true, linemarks ) );
432
433	CodeGen::FixMain::fix( *output, (PreludeDirector + "/bootloader.c").c_str() );
434	if ( output != &cout ) {
435	delete output;
436	} // if
437	} catch ( SemanticErrorException & e ) {
438	if ( errorp ) {
439	cerr << "---AST at error:---" << endl;
440	dump( translationUnit, cerr );
441	cerr << endl << "---End of AST, begin error message:---\n" << endl;
442	} // if
443	e.print();
444	if ( output != &cout ) {
445	delete output;
446	} // if
447	return EXIT_FAILURE;
448	} catch ( UnimplementedError & e ) {
449	cout << "Sorry, " << e.get_what() << " is not currently implemented" << endl;
450	if ( output != &cout ) {
451	delete output;
452	} // if
453	return EXIT_FAILURE;
454	} catch ( CompilerError & e ) {
455	cerr << "Compiler Error: " << e.get_what() << endl;
456	cerr << "(please report bugs to [REDACTED])" << endl;
457	if ( output != &cout ) {
458	delete output;
459	} // if
460	return EXIT_FAILURE;
461	} catch ( std::bad_alloc & ) {
462	cerr << "cfa-cpp compilation error std::bad_alloc" << endl;
463	backtrace( 1 );
464	abort();
465	} catch ( ... ) {
466	exception_ptr eptr = current_exception();
467	try {
468	if (eptr) {
469	rethrow_exception(eptr);
470	} else {
471	cerr << "cfa-cpp compilation error exception uncaught and unknown" << endl;
472	} // if
473	} catch( const exception & e ) {
474	cerr << "cfa-cpp compilation error uncaught exception \"" << e.what() << "\"\n";
475	} // try
476	return EXIT_FAILURE;
477	} // try
478
479	deleteAll( translationUnit );
480	Stats::print();
481	return EXIT_SUCCESS;
482	} // main
483
484
485	static const char optstring[] = ":c:ghlLmNnpdOAP:S:twW:D:";
486
487	enum { PreludeDir = 128 };
488	static struct option long_opts[] = {
489	{ "colors", required_argument, nullptr, 'c' },
490	{ "gdb", no_argument, nullptr, 'g' },
491	{ "help", no_argument, nullptr, 'h' },
492	{ "libcfa", no_argument, nullptr, 'l' },
493	{ "linemarks", no_argument, nullptr, 'L' },
494	{ "no-main", no_argument, 0, 'm' },
495	{ "no-linemarks", no_argument, nullptr, 'N' },
496	{ "no-prelude", no_argument, nullptr, 'n' },
497	{ "prototypes", no_argument, nullptr, 'p' },
498	{ "deterministic-out", no_argument, nullptr, 'd' },
499	{ "old-ast", no_argument, nullptr, 'O'},
500	{ "new-ast", no_argument, nullptr, 'A'},
501	{ "print", required_argument, nullptr, 'P' },
502	{ "prelude-dir", required_argument, nullptr, PreludeDir },
503	{ "statistics", required_argument, nullptr, 'S' },
504	{ "tree", no_argument, nullptr, 't' },
505	{ "", no_argument, nullptr, 0 }, // -w
506	{ "", no_argument, nullptr, 0 }, // -W
507	{ "", no_argument, nullptr, 0 }, // -D
508	{ nullptr, 0, nullptr, 0 }
509	}; // long_opts
510
511	static const char * description[] = {
512	"diagnostic color: never, always, auto", // -c
513	"wait for gdb to attach", // -g
514	"print translator help message", // -h
515	"generate libcfa.c", // -l
516	"generate line marks", // -L
517	"do not replace main", // -m
518	"do not generate line marks", // -N
519	"do not read prelude", // -n
520	"do not generate prelude prototypes => prelude not printed", // -p
521	"only print deterministic output", // -d
522	"Use the old-ast", // -O
523	"Use the new-ast", // -A
524	"print", // -P
525	"<directory> prelude directory for debug/nodebug", // no flag
526	"<option-list> enable profiling information: counters, heap, time, all, none", // -S
527	"building cfa standard lib", // -t
528	"", // -w
529	"", // -W
530	"", // -D
531	}; // description
532
533	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
534
535	static struct Printopts {
536	const char * name;
537	int & flag;
538	int val;
539	const char * descript;
540	} printopts[] = {
541	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
542	{ "asterr", errorp, true, "print AST on error" },
543	{ "declstats", declstatsp, true, "code property statistics" },
544	{ "parse", yydebug, true, "yacc (parsing) debug information" },
545	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
546	{ "rproto", resolvprotop, true, "resolver-proto instance" },
547	{ "rsteps", resolvep, true, "print resolver steps" },
548	{ "tree", parsep, true, "print parse tree" },
549	// code dumps
550	{ "ast", astp, true, "print AST after parsing" },
551	{ "symevt", symtabp, true, "print AST after symbol table events" },
552	{ "altexpr", expraltp, true, "print alternatives for expressions" },
553	{ "astdecl", validp, true, "print AST after declaration validation pass" },
554	{ "resolver", bresolvep, true, "print AST before resolver step" },
555	{ "astexpr", exprp, true, "print AST after expression analysis" },
556	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
557	{ "tuple", tuplep, true, "print AST after tuple expansion" },
558	{ "astgen", genericsp, true, "print AST after instantiate generics" },
559	{ "box", bboxp, true, "print AST before box step" },
560	{ "codegen", bcodegenp, true, "print AST before code generation" },
561	};
562	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
563
564	static void usage( char * argv[] ) {
565	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
566	int i = 0, j = 1; // j skips starting colon
567	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
568	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
569	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
570	cout << " -" << optstring[j] << ",";
571	} else { // no flag
572	j -= 1; // compensate
573	cout << " ";
574	} // if
575	cout << " --" << left << setw(12) << long_opts[i].name << " ";
576	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
577	cout << "one of: " << endl;
578	for ( int i = 0; i < printoptsSize; i += 1 ) {
579	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
580	} // for
581	} else {
582	cout << description[i] << endl;
583	} // if
584	} // if
585	if ( optstring[j + 1] == ':' ) j += 1;
586	} // for
587	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
588	exit( EXIT_FAILURE );
589	} // usage
590
591	static void parse_cmdline( int argc, char * argv[] ) {
592	opterr = 0; // (global) prevent getopt from printing error messages
593
594	bool Wsuppress = false, Werror = false;
595	int c;
596	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
597	switch ( c ) {
598	case 'c': // diagnostic colors
599	if ( strcmp( optarg, "always" ) == 0 ) {
600	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
601	} else if ( strcmp( optarg, "never" ) == 0 ) {
602	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
603	} else if ( strcmp( optarg, "auto" ) == 0 ) {
604	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
605	} // if
606	break;
607	case 'h': // help message
608	usage( argv ); // no return
609	break;
610	case 'l': // generate libcfa.c
611	libcfap = true;
612	break;
613	case 'L': // generate line marks
614	linemarks = true;
615	break;
616	case 'm': // do not replace main
617	nomainp = true;
618	break;
619	case 'N': // do not generate line marks
620	linemarks = false;
621	break;
622	case 'n': // do not read prelude
623	nopreludep = true;
624	break;
625	case 'p': // generate prototypes for prelude functions
626	genproto = true;
627	break;
628	case 'd': // don't print non-deterministic output
629	deterministic_output = true;
630	break;
631	case 'O': // don't print non-deterministic output
632	useNewAST = false;
633	break;
634	case 'A': // don't print non-deterministic output
635	useNewAST = true;
636	break;
637	case 'P': // print options
638	for ( int i = 0;; i += 1 ) {
639	if ( i == printoptsSize ) {
640	cout << "Unknown --print option " << optarg << endl;
641	goto Default;
642	} // if
643	if ( strcmp( optarg, printopts[i].name ) == 0 ) {
644	printopts[i].flag = printopts[i].val;
645	break;
646	} // if
647	} // for
648	break;
649	case PreludeDir: // prelude directory for debug/nodebug, hidden
650	PreludeDirector = optarg;
651	break;
652	case 'S': // enable profiling information, argument comma separated list of names
653	Stats::parse_params( optarg );
654	break;
655	case 't': // building cfa stdlib
656	treep = true;
657	break;
658	case 'g': // wait for gdb
659	waiting_for_gdb = true;
660	break;
661	case 'w': // suppress all warnings, hidden
662	Wsuppress = true;
663	break;
664	case 'W': // coordinate gcc -W with CFA, hidden
665	if ( strcmp( optarg, "all" ) == 0 ) {
666	SemanticWarning_EnableAll();
667	} else if ( strcmp( optarg, "error" ) == 0 ) {
668	Werror = true;
669	} else {
670	char * warning = optarg;
671	Severity s;
672	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
673	warning += 3;
674	s = Severity::Suppress;
675	} else {
676	s = Severity::Warn;
677	} // if
678	SemanticWarning_Set( warning, s );
679	} // if
680	break;
681	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
682	break;
683	case '?': // unknown option
684	if ( optopt ) { // short option ?
685	cout << "Unknown option -" << (char)optopt << endl;
686	} else {
687	cout << "Unknown option " << argv[optind - 1] << endl;
688	} // if
689	goto Default;
690	case ':': // missing option
691	if ( optopt ) { // short option ?
692	cout << "Missing option for -" << (char)optopt << endl;
693	} else {
694	cout << "Missing option for " << argv[optind - 1] << endl;
695	} // if
696	goto Default;
697	Default:
698	default:
699	usage( argv ); // no return
700	} // switch
701	} // while
702
703	if ( Werror ) {
704	SemanticWarning_WarningAsError();
705	} // if
706	if ( Wsuppress ) {
707	SemanticWarning_SuppressAll();
708	} // if
709	// for ( const auto w : WarningFormats ) {
710	// cout << w.name << ' ' << (int)w.severity << endl;
711	// } // for
712	} // parse_cmdline
713
714	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit ) {
715	extern int yyparse( void );
716	extern FILE * yyin;
717	extern int yylineno;
718
719	::linkage = linkage; // set globals
720	yyin = input;
721	yylineno = 1;
722	int parseStatus = yyparse();
723
724	fclose( input );
725	if ( shouldExit \|\| parseStatus != 0 ) {
726	exit( parseStatus );
727	} // if
728	} // parse
729
730	static bool notPrelude( Declaration * decl ) {
731	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
732	} // notPrelude
733
734	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
735	list< Declaration * > decls;
736
737	if ( genproto ) {
738	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
739	} else {
740	decls = translationUnit;
741	} // if
742
743	// depending on commandline options, either generate code or dump the AST
744	if ( codegenp ) {
745	CodeGen::generate( decls, out, ! genproto, prettycodegenp );
746	} else {
747	printAll( decls, out );
748	} // if
749	deleteAll( translationUnit );
750	} // dump
751
752	static void dump( ast::TranslationUnit && transUnit, ostream & out ) {
753	std::list< Declaration * > translationUnit = convert( move( transUnit ) );
754	dump( translationUnit, out );
755	}
756
757	// Local Variables: //
758	// tab-width: 4 //
759	// mode: c++ //
760	// compile-command: "make install" //
761	// End: //

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