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source: src/main.cc @ 0c730d9

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

Last change on this file since 0c730d9 was 0c730d9, checked in by Henry Xue <y58xue@…>, 3 years ago
Translate exception declarations
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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 : Henry Xue
12	// Last Modified On : Tue Jul 20 04:10:50 2021
13	// Update Count : 657
14	//
15
16	#include <cxxabi.h> // for __cxa_demangle
17	#include <execinfo.h> // for backtrace, backtrace_symbols
18	#include <getopt.h> // for no_argument, optind, geto...
19	#include <cassert> // for assertf
20	#include <cstdio> // for fopen, FILE, fclose, stdin
21	#include <cstdlib> // for exit, free, abort, EXIT_F...
22	#include <csignal> // for signal, SIGABRT, SIGSEGV
23	#include <cstring> // for index
24	#include <fstream> // for ofstream
25	#include <iostream> // for operator<<, basic_ostream
26	#include <iomanip>
27	#include <iterator> // for back_inserter
28	#include <list> // for list
29	#include <string> // for char_traits, operator<<
30
31	using namespace std;
32
33	#include "AST/Convert.hpp"
34	#include "CompilationState.h"
35	#include "../config.h" // for CFA_LIBDIR
36	#include "CodeGen/FixMain.h" // for FixMain
37	#include "CodeGen/FixNames.h" // for fixNames
38	#include "CodeGen/Generate.h" // for generate
39	#include "CodeGen/LinkOnce.h" // for translateLinkOnce
40	#include "CodeTools/DeclStats.h" // for printDeclStats
41	#include "CodeTools/ResolvProtoDump.h" // for dumpAsResolvProto
42	#include "CodeTools/TrackLoc.h" // for fillLocations
43	#include "Common/CodeLocationTools.hpp" // for forceFillCodeLocations
44	#include "Common/CompilerError.h" // for CompilerError
45	#include "Common/Stats.h"
46	#include "Common/PassVisitor.h"
47	#include "Common/SemanticError.h" // for SemanticError
48	#include "Common/UnimplementedError.h" // for UnimplementedError
49	#include "Common/utility.h" // for deleteAll, filter, printAll
50	#include "Concurrency/Waitfor.h" // for generateWaitfor
51	#include "ControlStruct/ExceptDecl.h" // for translateExcept
52	#include "ControlStruct/ExceptTranslate.h" // for translateEHM
53	#include "ControlStruct/Mutate.h" // for mutate
54	#include "GenPoly/Box.h" // for box
55	#include "GenPoly/InstantiateGeneric.h" // for instantiateGeneric
56	#include "GenPoly/Lvalue.h" // for convertLvalue
57	#include "GenPoly/Specialize.h" // for convertSpecializations
58	#include "InitTweak/FixInit.h" // for fix
59	#include "InitTweak/GenInit.h" // for genInit
60	#include "MakeLibCfa.h" // for makeLibCfa
61	#include "Parser/ParseNode.h" // for DeclarationNode, buildList
62	#include "Parser/TypedefTable.h" // for TypedefTable
63	#include "ResolvExpr/AlternativePrinter.h" // for AlternativePrinter
64	#include "ResolvExpr/Resolver.h" // for resolve
65	#include "SymTab/Validate.h" // for validate
66	#include "SynTree/LinkageSpec.h" // for Spec, Cforall, Intrinsic
67	#include "SynTree/Declaration.h" // for Declaration
68	#include "SynTree/Visitor.h" // for acceptAll
69	#include "Tuples/Tuples.h" // for expandMemberTuples, expan...
70	#include "Virtual/ExpandCasts.h" // for expandCasts
71
72
73	static void NewPass( const char * const name ) {
74	Stats::Heap::newPass( name );
75	using namespace Stats::Counters;
76	{
77	static auto group = build<CounterGroup>( "Pass Visitor" );
78	auto pass = build<CounterGroup>( name, group );
79	pass_visitor_stats.depth = 0;
80	pass_visitor_stats.avg = build<AverageCounter<double>>( "Average Depth", pass );
81	pass_visitor_stats.max = build<MaxCounter<double>>( "Max Depth", pass );
82	}
83	{
84	static auto group = build<CounterGroup>( "Syntax Node" );
85	auto pass = build<CounterGroup>( name, group );
86	BaseSyntaxNode::new_nodes = build<SimpleCounter>( "Allocs", pass );
87	}
88	}
89
90	#define PASS( name, pass ) \
91	if ( errorp ) { cerr << name << endl; } \
92	NewPass(name); \
93	Stats::Time::StartBlock(name); \
94	pass; \
95	Stats::Time::StopBlock();
96
97	LinkageSpec::Spec linkage = LinkageSpec::Cforall;
98	TypedefTable typedefTable;
99	DeclarationNode * parseTree = nullptr; // program parse tree
100
101	static bool waiting_for_gdb = false; // flag to set cfa-cpp to wait for gdb on start
102
103	static string PreludeDirector = "";
104
105	static void parse_cmdline( int argc, char * argv[] );
106	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit = false );
107	static void dump( list< Declaration * > & translationUnit, ostream & out = cout );
108	static void dump( ast::TranslationUnit && transUnit, ostream & out = cout );
109
110	static void backtrace( int start ) { // skip first N stack frames
111	enum { Frames = 50, }; // maximum number of stack frames
112	void * array[Frames];
113	size_t size = ::backtrace( array, Frames );
114	char ** messages = ::backtrace_symbols( array, size ); // does not demangle names
115
116	*index( messages[0], '(' ) = '\0'; // find executable name
117	cerr << "Stack back trace for: " << messages[0] << endl;
118
119	// skip last 2 stack frames after main
120	for ( unsigned int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
121	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
122
123	for ( char * p = messages[i]; *p; p += 1 ) { // find parantheses and +offset
124	if ( *p == '(' ) {
125	mangled_name = p;
126	} else if ( *p == '+' ) {
127	offset_begin = p;
128	} else if ( *p == ')' ) {
129	offset_end = p;
130	break;
131	} // if
132	} // for
133
134	// if line contains symbol, attempt to demangle
135	int frameNo = i - start;
136	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
137	*mangled_name++ = '\0'; // delimit strings
138	*offset_begin++ = '\0';
139	*offset_end++ = '\0';
140
141	int status;
142	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
143	// bug in __cxa_demangle for single-character lower-case non-mangled names
144	if ( status == 0 ) { // demangling successful ?
145	cerr << "(" << frameNo << ") " << messages[i] << " : "
146	<< real_name << "+" << offset_begin << offset_end << endl;
147	} else { // otherwise, output mangled name
148	cerr << "(" << frameNo << ") " << messages[i] << " : "
149	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
150	} // if
151
152	free( real_name );
153	} else { // otherwise, print the whole line
154	cerr << "(" << frameNo << ") " << messages[i] << endl;
155	} // if
156	} // for
157
158	free( messages );
159	} // backtrace
160
161	#define SIGPARMS int sig __attribute__(( unused )), siginfo_t * sfp __attribute__(( unused )), ucontext_t * cxt __attribute__(( unused ))
162
163	static void _Signal(struct sigaction & act, int sig, int flags ) {
164	act.sa_flags = flags;
165
166	if ( sigaction( sig, &act, nullptr ) == -1 ) {
167	cerr << "cfa-cpp compilation error problem installing signal handler, error(" << errno << ") " << strerror( errno ) << endl;
168	_exit( EXIT_FAILURE );
169	} // if
170	}
171
172	static void Signal( int sig, void (* handler)(SIGPARMS), int flags ) {
173	struct sigaction act;
174	act.sa_sigaction = (void ()(int, siginfo_t , void *))handler;
175	_Signal(act, sig, flags);
176	} // Signal
177
178	static void Signal( int sig, void (* handler)(int), int flags ) {
179	struct sigaction act;
180	act.sa_handler = handler;
181	_Signal(act, sig, flags);
182	} // Signal
183
184	static void sigSegvBusHandler( SIGPARMS ) {
185	if ( sfp->si_addr == nullptr ) {
186	cerr << "Null pointer (nullptr) dereference." << endl;
187	} else {
188	cerr << (sig == SIGSEGV ? "Segment fault" : "Bus error") << " at memory location " << sfp->si_addr << "." << endl
189	<< "Possible cause is reading outside the address space or writing to a protected area within the address space with an invalid pointer or subscript." << endl;
190	} // if
191	backtrace( 2 ); // skip first 2 stack frames
192	abort(); // cause core dump for debugging
193	} // sigSegvBusHandler
194
195	static void sigFpeHandler( SIGPARMS ) {
196	const char * msg;
197
198	switch ( sfp->si_code ) {
199	case FPE_INTDIV: case FPE_FLTDIV: msg = "divide by zero"; break;
200	case FPE_FLTOVF: msg = "overflow"; break;
201	case FPE_FLTUND: msg = "underflow"; break;
202	case FPE_FLTRES: msg = "inexact result"; break;
203	case FPE_FLTINV: msg = "invalid operation"; break;
204	default: msg = "unknown";
205	} // choose
206	cerr << "Computation error " << msg << " at location " << sfp->si_addr << endl
207	<< "Possible cause is constant-expression evaluation invalid." << endl;
208	backtrace( 2 ); // skip first 2 stack frames
209	abort(); // cause core dump for debugging
210	} // sigFpeHandler
211
212	static void sigAbortHandler( SIGPARMS ) {
213	backtrace( 6 ); // skip first 6 stack frames
214	Signal( SIGABRT, SIG_DFL, SA_SIGINFO ); // reset default signal handler
215	raise( SIGABRT ); // reraise SIGABRT
216	} // sigAbortHandler
217
218	int main( int argc, char * argv[] ) {
219	FILE * input; // use FILE rather than istream because yyin is FILE
220	ostream * output = & cout;
221	list< Declaration * > translationUnit;
222
223	Signal( SIGSEGV, sigSegvBusHandler, SA_SIGINFO );
224	Signal( SIGBUS, sigSegvBusHandler, SA_SIGINFO );
225	Signal( SIGFPE, sigFpeHandler, SA_SIGINFO );
226	Signal( SIGABRT, sigAbortHandler, SA_SIGINFO );
227
228	// cout << "main" << endl;
229	// for ( int i = 0; i < argc; i += 1 ) {
230	// cout << '\t' << argv[i] << endl;
231	// } // for
232
233	parse_cmdline( argc, argv ); // process command-line arguments
234	CodeGen::FixMain::setReplaceMain( !nomainp );
235
236	if ( waiting_for_gdb ) {
237	cerr << "Waiting for gdb" << endl;
238	cerr << "run :" << endl;
239	cerr << " gdb attach " << getpid() << endl;
240	raise(SIGSTOP);
241	} // if
242
243	try {
244	// choose to read the program from a file or stdin
245	if ( optind < argc ) { // any commands after the flags ? => input file name
246	input = fopen( argv[ optind ], "r" );
247	assertf( input, "cannot open %s because %s\n", argv[ optind ], strerror( errno ) );
248	optind += 1;
249	} else { // no input file name
250	input = stdin;
251	} // if
252
253	Stats::Time::StartGlobal();
254	NewPass("Parse");
255	Stats::Time::StartBlock("Parse");
256
257	// read in the builtins, extras, and the prelude
258	if ( ! nopreludep ) { // include gcc builtins
259	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
260
261	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
262
263	// Read to gcc builtins, if not generating the cfa library
264	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cf").c_str(), "r" );
265	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
266	parse( gcc_builtins, LinkageSpec::Compiler );
267
268	// read the extra prelude in, if not generating the cfa library
269	FILE * extras = fopen( (PreludeDirector + "/extras.cf").c_str(), "r" );
270	assertf( extras, "cannot open extras.cf\n" );
271	parse( extras, LinkageSpec::BuiltinC );
272
273	if ( ! libcfap ) {
274	// read the prelude in, if not generating the cfa library
275	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
276	assertf( prelude, "cannot open prelude.cfa\n" );
277	parse( prelude, LinkageSpec::Intrinsic );
278
279	// Read to cfa builtins, if not generating the cfa library
280	FILE * builtins = fopen( (PreludeDirector + "/builtins.cf").c_str(), "r" );
281	assertf( builtins, "cannot open builtins.cf\n" );
282	parse( builtins, LinkageSpec::BuiltinCFA );
283	} // if
284	} // if
285
286	parse( input, libcfap ? LinkageSpec::Intrinsic : LinkageSpec::Cforall, yydebug );
287
288	if ( parsep ) {
289	parseTree->printList( cout );
290	delete parseTree;
291	return EXIT_SUCCESS;
292	} // if
293
294	buildList( parseTree, translationUnit );
295	delete parseTree;
296	parseTree = nullptr;
297
298	if ( astp ) {
299	dump( translationUnit );
300	return EXIT_SUCCESS;
301	} // if
302
303	// Temporary: fill locations after parsing so that every node has a location, for early error messages.
304	// Eventually we should pass the locations from the parser to every node, but this quick and dirty solution
305	// works okay for now.
306	CodeTools::fillLocations( translationUnit );
307	Stats::Time::StopBlock();
308
309	PASS( "Translate Exception Declarations", ControlStruct::translateExcept( translationUnit ) );
310
311	// add the assignment statement after the initialization of a type parameter
312	PASS( "Validate", SymTab::validate( translationUnit, symtabp ) );
313	if ( symtabp ) {
314	deleteAll( translationUnit );
315	return EXIT_SUCCESS;
316	} // if
317
318	if ( expraltp ) {
319	PassVisitor<ResolvExpr::AlternativePrinter> printer( cout );
320	acceptAll( translationUnit, printer );
321	return EXIT_SUCCESS;
322	} // if
323
324	if ( validp ) {
325	dump( translationUnit );
326	return EXIT_SUCCESS;
327	} // if
328
329	PASS( "Translate Throws", ControlStruct::translateThrows( translationUnit ) );
330	PASS( "Fix Labels", ControlStruct::fixLabels( translationUnit ) );
331	PASS( "Fix Names", CodeGen::fixNames( translationUnit ) );
332	PASS( "Gen Init", InitTweak::genInit( translationUnit ) );
333	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( translationUnit ) );
334	if ( libcfap ) {
335	// generate the bodies of cfa library functions
336	LibCfa::makeLibCfa( translationUnit );
337	} // if
338
339	if ( declstatsp ) {
340	CodeTools::printDeclStats( translationUnit );
341	deleteAll( translationUnit );
342	return EXIT_SUCCESS;
343	} // if
344
345	if ( bresolvep ) {
346	dump( translationUnit );
347	return EXIT_SUCCESS;
348	} // if
349
350	CodeTools::fillLocations( translationUnit );
351
352	if ( resolvprotop ) {
353	CodeTools::dumpAsResolvProto( translationUnit );
354	return EXIT_SUCCESS;
355	} // if
356
357	if( useNewAST ) {
358	if (Stats::Counters::enabled) {
359	ast::pass_visitor_stats.avg = Stats::Counters::build<Stats::Counters::AverageCounter<double>>("Average Depth - New");
360	ast::pass_visitor_stats.max = Stats::Counters::build<Stats::Counters::MaxCounter<double>>("Max depth - New");
361	}
362	auto transUnit = convert( move( translationUnit ) );
363	PASS( "Resolve", ResolvExpr::resolve( transUnit ) );
364	if ( exprp ) {
365	dump( move( transUnit ) );
366	return EXIT_SUCCESS;
367	} // if
368
369	forceFillCodeLocations( transUnit );
370
371	PASS( "Fix Init", InitTweak::fix(transUnit, buildingLibrary()));
372	translationUnit = convert( move( transUnit ) );
373	} else {
374	PASS( "Resolve", ResolvExpr::resolve( translationUnit ) );
375	if ( exprp ) {
376	dump( translationUnit );
377	return EXIT_SUCCESS;
378	}
379
380	PASS( "Fix Init", InitTweak::fix( translationUnit, buildingLibrary() ) );
381	}
382
383	// fix ObjectDecl - replaces ConstructorInit nodes
384	if ( ctorinitp ) {
385	dump ( translationUnit );
386	return EXIT_SUCCESS;
387	} // if
388
389	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
390
391	PASS( "Translate Tries" , ControlStruct::translateTries( translationUnit ) );
392
393	PASS( "Gen Waitfor" , Concurrency::generateWaitFor( translationUnit ) );
394
395	PASS( "Convert Specializations", GenPoly::convertSpecializations( translationUnit ) ); // needs to happen before tuple types are expanded
396
397	PASS( "Expand Tuples", Tuples::expandTuples( translationUnit ) ); // xxx - is this the right place for this?
398
399	if ( tuplep ) {
400	dump( translationUnit );
401	return EXIT_SUCCESS;
402	} // if
403
404	PASS( "Virtual Expand Casts", Virtual::expandCasts( translationUnit ) ); // Must come after translateEHM
405
406	PASS( "Instantiate Generics", GenPoly::instantiateGeneric( translationUnit ) );
407	if ( genericsp ) {
408	dump( translationUnit );
409	return EXIT_SUCCESS;
410	} // if
411
412	PASS( "Convert L-Value", GenPoly::convertLvalue( translationUnit ) );
413
414	if ( bboxp ) {
415	dump( translationUnit );
416	return EXIT_SUCCESS;
417	} // if
418	PASS( "Box", GenPoly::box( translationUnit ) );
419
420	PASS( "Link-Once", CodeGen::translateLinkOnce( translationUnit ) );
421
422	// Code has been lowered to C, now we can start generation.
423
424	if ( bcodegenp ) {
425	dump( translationUnit );
426	return EXIT_SUCCESS;
427	} // if
428
429	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
430	output = new ofstream( argv[ optind ] );
431	} // if
432
433	CodeTools::fillLocations( translationUnit );
434	PASS( "Code Gen", CodeGen::generate( translationUnit, *output, ! genproto, prettycodegenp, true, linemarks ) );
435
436	CodeGen::FixMain::fix( *output, (PreludeDirector + "/bootloader.c").c_str() );
437	if ( output != &cout ) {
438	delete output;
439	} // if
440	} catch ( SemanticErrorException & e ) {
441	if ( errorp ) {
442	cerr << "---AST at error:---" << endl;
443	dump( translationUnit, cerr );
444	cerr << endl << "---End of AST, begin error message:---\n" << endl;
445	} // if
446	e.print();
447	if ( output != &cout ) {
448	delete output;
449	} // if
450	return EXIT_FAILURE;
451	} catch ( UnimplementedError & e ) {
452	cout << "Sorry, " << e.get_what() << " is not currently implemented" << endl;
453	if ( output != &cout ) {
454	delete output;
455	} // if
456	return EXIT_FAILURE;
457	} catch ( CompilerError & e ) {
458	cerr << "Compiler Error: " << e.get_what() << endl;
459	cerr << "(please report bugs to [REDACTED])" << endl;
460	if ( output != &cout ) {
461	delete output;
462	} // if
463	return EXIT_FAILURE;
464	} catch ( std::bad_alloc & ) {
465	cerr << "cfa-cpp compilation error std::bad_alloc" << endl;
466	backtrace( 1 );
467	abort();
468	} catch ( ... ) {
469	exception_ptr eptr = current_exception();
470	try {
471	if (eptr) {
472	rethrow_exception(eptr);
473	} else {
474	cerr << "cfa-cpp compilation error exception uncaught and unknown" << endl;
475	} // if
476	} catch( const exception & e ) {
477	cerr << "cfa-cpp compilation error uncaught exception \"" << e.what() << "\"\n";
478	} // try
479	return EXIT_FAILURE;
480	} // try
481
482	deleteAll( translationUnit );
483	Stats::print();
484	return EXIT_SUCCESS;
485	} // main
486
487
488	static const char optstring[] = ":c:ghlLmNnpdOAP:S:twW:D:";
489
490	enum { PreludeDir = 128 };
491	static struct option long_opts[] = {
492	{ "colors", required_argument, nullptr, 'c' },
493	{ "gdb", no_argument, nullptr, 'g' },
494	{ "help", no_argument, nullptr, 'h' },
495	{ "libcfa", no_argument, nullptr, 'l' },
496	{ "linemarks", no_argument, nullptr, 'L' },
497	{ "no-main", no_argument, 0, 'm' },
498	{ "no-linemarks", no_argument, nullptr, 'N' },
499	{ "no-prelude", no_argument, nullptr, 'n' },
500	{ "prototypes", no_argument, nullptr, 'p' },
501	{ "deterministic-out", no_argument, nullptr, 'd' },
502	{ "old-ast", no_argument, nullptr, 'O'},
503	{ "new-ast", no_argument, nullptr, 'A'},
504	{ "print", required_argument, nullptr, 'P' },
505	{ "prelude-dir", required_argument, nullptr, PreludeDir },
506	{ "statistics", required_argument, nullptr, 'S' },
507	{ "tree", no_argument, nullptr, 't' },
508	{ "", no_argument, nullptr, 0 }, // -w
509	{ "", no_argument, nullptr, 0 }, // -W
510	{ "", no_argument, nullptr, 0 }, // -D
511	{ nullptr, 0, nullptr, 0 }
512	}; // long_opts
513
514	static const char * description[] = {
515	"diagnostic color: never, always, auto", // -c
516	"wait for gdb to attach", // -g
517	"print translator help message", // -h
518	"generate libcfa.c", // -l
519	"generate line marks", // -L
520	"do not replace main", // -m
521	"do not generate line marks", // -N
522	"do not read prelude", // -n
523	"do not generate prelude prototypes => prelude not printed", // -p
524	"only print deterministic output", // -d
525	"Use the old-ast", // -O
526	"Use the new-ast", // -A
527	"print", // -P
528	"<directory> prelude directory for debug/nodebug", // no flag
529	"<option-list> enable profiling information: counters, heap, time, all, none", // -S
530	"building cfa standard lib", // -t
531	"", // -w
532	"", // -W
533	"", // -D
534	}; // description
535
536	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
537
538	static struct Printopts {
539	const char * name;
540	int & flag;
541	int val;
542	const char * descript;
543	} printopts[] = {
544	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
545	{ "asterr", errorp, true, "print AST on error" },
546	{ "declstats", declstatsp, true, "code property statistics" },
547	{ "parse", yydebug, true, "yacc (parsing) debug information" },
548	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
549	{ "rproto", resolvprotop, true, "resolver-proto instance" },
550	{ "rsteps", resolvep, true, "print resolver steps" },
551	{ "tree", parsep, true, "print parse tree" },
552	// code dumps
553	{ "ast", astp, true, "print AST after parsing" },
554	{ "symevt", symtabp, true, "print AST after symbol table events" },
555	{ "altexpr", expraltp, true, "print alternatives for expressions" },
556	{ "astdecl", validp, true, "print AST after declaration validation pass" },
557	{ "resolver", bresolvep, true, "print AST before resolver step" },
558	{ "astexpr", exprp, true, "print AST after expression analysis" },
559	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
560	{ "tuple", tuplep, true, "print AST after tuple expansion" },
561	{ "astgen", genericsp, true, "print AST after instantiate generics" },
562	{ "box", bboxp, true, "print AST before box step" },
563	{ "codegen", bcodegenp, true, "print AST before code generation" },
564	};
565	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
566
567	static void usage( char * argv[] ) {
568	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
569	int i = 0, j = 1; // j skips starting colon
570	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
571	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
572	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
573	cout << " -" << optstring[j] << ",";
574	} else { // no flag
575	j -= 1; // compensate
576	cout << " ";
577	} // if
578	cout << " --" << left << setw(12) << long_opts[i].name << " ";
579	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
580	cout << "one of: " << endl;
581	for ( int i = 0; i < printoptsSize; i += 1 ) {
582	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
583	} // for
584	} else {
585	cout << description[i] << endl;
586	} // if
587	} // if
588	if ( optstring[j + 1] == ':' ) j += 1;
589	} // for
590	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
591	exit( EXIT_FAILURE );
592	} // usage
593
594	static void parse_cmdline( int argc, char * argv[] ) {
595	opterr = 0; // (global) prevent getopt from printing error messages
596
597	bool Wsuppress = false, Werror = false;
598	int c;
599	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
600	switch ( c ) {
601	case 'c': // diagnostic colors
602	if ( strcmp( optarg, "always" ) == 0 ) {
603	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
604	} else if ( strcmp( optarg, "never" ) == 0 ) {
605	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
606	} else if ( strcmp( optarg, "auto" ) == 0 ) {
607	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
608	} // if
609	break;
610	case 'h': // help message
611	usage( argv ); // no return
612	break;
613	case 'l': // generate libcfa.c
614	libcfap = true;
615	break;
616	case 'L': // generate line marks
617	linemarks = true;
618	break;
619	case 'm': // do not replace main
620	nomainp = true;
621	break;
622	case 'N': // do not generate line marks
623	linemarks = false;
624	break;
625	case 'n': // do not read prelude
626	nopreludep = true;
627	break;
628	case 'p': // generate prototypes for prelude functions
629	genproto = true;
630	break;
631	case 'd': // don't print non-deterministic output
632	deterministic_output = true;
633	break;
634	case 'O': // don't print non-deterministic output
635	useNewAST = false;
636	break;
637	case 'A': // don't print non-deterministic output
638	useNewAST = true;
639	break;
640	case 'P': // print options
641	for ( int i = 0;; i += 1 ) {
642	if ( i == printoptsSize ) {
643	cout << "Unknown --print option " << optarg << endl;
644	goto Default;
645	} // if
646	if ( strcmp( optarg, printopts[i].name ) == 0 ) {
647	printopts[i].flag = printopts[i].val;
648	break;
649	} // if
650	} // for
651	break;
652	case PreludeDir: // prelude directory for debug/nodebug, hidden
653	PreludeDirector = optarg;
654	break;
655	case 'S': // enable profiling information, argument comma separated list of names
656	Stats::parse_params( optarg );
657	break;
658	case 't': // building cfa stdlib
659	treep = true;
660	break;
661	case 'g': // wait for gdb
662	waiting_for_gdb = true;
663	break;
664	case 'w': // suppress all warnings, hidden
665	Wsuppress = true;
666	break;
667	case 'W': // coordinate gcc -W with CFA, hidden
668	if ( strcmp( optarg, "all" ) == 0 ) {
669	SemanticWarning_EnableAll();
670	} else if ( strcmp( optarg, "error" ) == 0 ) {
671	Werror = true;
672	} else {
673	char * warning = optarg;
674	Severity s;
675	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
676	warning += 3;
677	s = Severity::Suppress;
678	} else {
679	s = Severity::Warn;
680	} // if
681	SemanticWarning_Set( warning, s );
682	} // if
683	break;
684	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
685	break;
686	case '?': // unknown option
687	if ( optopt ) { // short option ?
688	cout << "Unknown option -" << (char)optopt << endl;
689	} else {
690	cout << "Unknown option " << argv[optind - 1] << endl;
691	} // if
692	goto Default;
693	case ':': // missing option
694	if ( optopt ) { // short option ?
695	cout << "Missing option for -" << (char)optopt << endl;
696	} else {
697	cout << "Missing option for " << argv[optind - 1] << endl;
698	} // if
699	goto Default;
700	Default:
701	default:
702	usage( argv ); // no return
703	} // switch
704	} // while
705
706	if ( Werror ) {
707	SemanticWarning_WarningAsError();
708	} // if
709	if ( Wsuppress ) {
710	SemanticWarning_SuppressAll();
711	} // if
712	// for ( const auto w : WarningFormats ) {
713	// cout << w.name << ' ' << (int)w.severity << endl;
714	// } // for
715	} // parse_cmdline
716
717	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit ) {
718	extern int yyparse( void );
719	extern FILE * yyin;
720	extern int yylineno;
721
722	::linkage = linkage; // set globals
723	yyin = input;
724	yylineno = 1;
725	int parseStatus = yyparse();
726
727	fclose( input );
728	if ( shouldExit \|\| parseStatus != 0 ) {
729	exit( parseStatus );
730	} // if
731	} // parse
732
733	static bool notPrelude( Declaration * decl ) {
734	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
735	} // notPrelude
736
737	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
738	list< Declaration * > decls;
739
740	if ( genproto ) {
741	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
742	} else {
743	decls = translationUnit;
744	} // if
745
746	// depending on commandline options, either generate code or dump the AST
747	if ( codegenp ) {
748	CodeGen::generate( decls, out, ! genproto, prettycodegenp );
749	} else {
750	printAll( decls, out );
751	} // if
752	deleteAll( translationUnit );
753	} // dump
754
755	static void dump( ast::TranslationUnit && transUnit, ostream & out ) {
756	std::list< Declaration * > translationUnit = convert( move( transUnit ) );
757	dump( translationUnit, out );
758	}
759
760	// Local Variables: //
761	// tab-width: 4 //
762	// mode: c++ //
763	// compile-command: "make install" //
764	// End: //

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