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source: src/main.cc @ efc8f3e

ADTast-experimentalenumforall-pointer-decaypthread-emulationqualifiedEnum

Last change on this file since efc8f3e was 68fe946e, checked in by Andrew Beach <ajbeach@…>, 3 years ago
Updated DeclStats? for the new ast. Also fixed a bug in the old implementation (apparently it hasn't been used since gcc-builtins were added).
Property mode set to `100644`
File size: 28.1 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 : Wed Oct 8 11:22:00 2021
13	// Update Count : 651
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/DeclStats.hpp"
46	#include "Common/Stats.h"
47	#include "Common/PassVisitor.h"
48	#include "Common/SemanticError.h" // for SemanticError
49	#include "Common/UnimplementedError.h" // for UnimplementedError
50	#include "Common/utility.h" // for deleteAll, filter, printAll
51	#include "Concurrency/Waitfor.h" // for generateWaitfor
52	#include "ControlStruct/ExceptDecl.h" // for translateExcept
53	#include "ControlStruct/ExceptTranslate.h" // for translateEHM
54	#include "ControlStruct/Mutate.h" // for mutate
55	#include "GenPoly/Box.h" // for box
56	#include "GenPoly/InstantiateGeneric.h" // for instantiateGeneric
57	#include "GenPoly/Lvalue.h" // for convertLvalue
58	#include "GenPoly/Specialize.h" // for convertSpecializations
59	#include "InitTweak/FixInit.h" // for fix
60	#include "InitTweak/GenInit.h" // for genInit
61	#include "MakeLibCfa.h" // for makeLibCfa
62	#include "Parser/ParseNode.h" // for DeclarationNode, buildList
63	#include "Parser/TypedefTable.h" // for TypedefTable
64	#include "ResolvExpr/AlternativePrinter.h" // for AlternativePrinter
65	#include "ResolvExpr/Resolver.h" // for resolve
66	#include "SymTab/Validate.h" // for validate
67	#include "SynTree/LinkageSpec.h" // for Spec, Cforall, Intrinsic
68	#include "SynTree/Declaration.h" // for Declaration
69	#include "SynTree/Visitor.h" // for acceptAll
70	#include "Tuples/Tuples.h" // for expandMemberTuples, expan...
71	#include "Virtual/ExpandCasts.h" // for expandCasts
72
73
74	static void NewPass( const char * const name ) {
75	Stats::Heap::newPass( name );
76	using namespace Stats::Counters;
77	{
78	static auto group = build<CounterGroup>( "Pass Visitor" );
79	auto pass = build<CounterGroup>( name, group );
80	pass_visitor_stats.depth = 0;
81	pass_visitor_stats.avg = build<AverageCounter<double>>( "Average Depth", pass );
82	pass_visitor_stats.max = build<MaxCounter<double>>( "Max Depth", pass );
83	}
84	{
85	static auto group = build<CounterGroup>( "Syntax Node" );
86	auto pass = build<CounterGroup>( name, group );
87	BaseSyntaxNode::new_nodes = build<SimpleCounter>( "Allocs", pass );
88	}
89	}
90
91	#define PASS( name, pass ) \
92	if ( errorp ) { cerr << name << endl; } \
93	NewPass(name); \
94	Stats::Time::StartBlock(name); \
95	pass; \
96	Stats::Time::StopBlock();
97
98	LinkageSpec::Spec linkage = LinkageSpec::Cforall;
99	TypedefTable typedefTable;
100	DeclarationNode * parseTree = nullptr; // program parse tree
101
102	static bool waiting_for_gdb = false; // flag to set cfa-cpp to wait for gdb on start
103
104	static string PreludeDirector = "";
105
106	static void parse_cmdline( int argc, char * argv[] );
107	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit = false );
108	static void dump( list< Declaration * > & translationUnit, ostream & out = cout );
109	static void dump( ast::TranslationUnit && transUnit, ostream & out = cout );
110
111	static void backtrace( int start ) { // skip first N stack frames
112	enum { Frames = 50, }; // maximum number of stack frames
113	void * array[Frames];
114	size_t size = ::backtrace( array, Frames );
115	char ** messages = ::backtrace_symbols( array, size ); // does not demangle names
116
117	*index( messages[0], '(' ) = '\0'; // find executable name
118	cerr << "Stack back trace for: " << messages[0] << endl;
119
120	// skip last 2 stack frames after main
121	for ( unsigned int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
122	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
123
124	for ( char * p = messages[i]; *p; p += 1 ) { // find parantheses and +offset
125	if ( *p == '(' ) {
126	mangled_name = p;
127	} else if ( *p == '+' ) {
128	offset_begin = p;
129	} else if ( *p == ')' ) {
130	offset_end = p;
131	break;
132	} // if
133	} // for
134
135	// if line contains symbol, attempt to demangle
136	int frameNo = i - start;
137	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
138	*mangled_name++ = '\0'; // delimit strings
139	*offset_begin++ = '\0';
140	*offset_end++ = '\0';
141
142	int status;
143	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
144	// bug in __cxa_demangle for single-character lower-case non-mangled names
145	if ( status == 0 ) { // demangling successful ?
146	cerr << "(" << frameNo << ") " << messages[i] << " : "
147	<< real_name << "+" << offset_begin << offset_end << endl;
148	} else { // otherwise, output mangled name
149	cerr << "(" << frameNo << ") " << messages[i] << " : "
150	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
151	} // if
152
153	free( real_name );
154	} else { // otherwise, print the whole line
155	cerr << "(" << frameNo << ") " << messages[i] << endl;
156	} // if
157	} // for
158
159	free( messages );
160	} // backtrace
161
162	#define SIGPARMS int sig __attribute__(( unused )), siginfo_t * sfp __attribute__(( unused )), ucontext_t * cxt __attribute__(( unused ))
163
164	static void _Signal(struct sigaction & act, int sig, int flags ) {
165	act.sa_flags = flags;
166
167	if ( sigaction( sig, &act, nullptr ) == -1 ) {
168	cerr << "cfa-cpp compilation error problem installing signal handler, error(" << errno << ") " << strerror( errno ) << endl;
169	_exit( EXIT_FAILURE );
170	} // if
171	}
172
173	static void Signal( int sig, void (* handler)(SIGPARMS), int flags ) {
174	struct sigaction act;
175	act.sa_sigaction = (void ()(int, siginfo_t , void *))handler;
176	_Signal(act, sig, flags);
177	} // Signal
178
179	static void Signal( int sig, void (* handler)(int), int flags ) {
180	struct sigaction act;
181	act.sa_handler = handler;
182	_Signal(act, sig, flags);
183	} // Signal
184
185	static void sigSegvBusHandler( SIGPARMS ) {
186	if ( sfp->si_addr == nullptr ) {
187	cerr << "Null pointer (nullptr) dereference." << endl;
188	} else {
189	cerr << (sig == SIGSEGV ? "Segment fault" : "Bus error") << " at memory location " << sfp->si_addr << "." << endl
190	<< "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;
191	} // if
192	backtrace( 2 ); // skip first 2 stack frames
193	abort(); // cause core dump for debugging
194	} // sigSegvBusHandler
195
196	static void sigFpeHandler( SIGPARMS ) {
197	const char * msg;
198
199	switch ( sfp->si_code ) {
200	case FPE_INTDIV: case FPE_FLTDIV: msg = "divide by zero"; break;
201	case FPE_FLTOVF: msg = "overflow"; break;
202	case FPE_FLTUND: msg = "underflow"; break;
203	case FPE_FLTRES: msg = "inexact result"; break;
204	case FPE_FLTINV: msg = "invalid operation"; break;
205	default: msg = "unknown";
206	} // choose
207	cerr << "Computation error " << msg << " at location " << sfp->si_addr << endl
208	<< "Possible cause is constant-expression evaluation invalid." << endl;
209	backtrace( 2 ); // skip first 2 stack frames
210	abort(); // cause core dump for debugging
211	} // sigFpeHandler
212
213	static void sigAbortHandler( SIGPARMS ) {
214	backtrace( 6 ); // skip first 6 stack frames
215	Signal( SIGABRT, SIG_DFL, SA_SIGINFO ); // reset default signal handler
216	raise( SIGABRT ); // reraise SIGABRT
217	} // sigAbortHandler
218
219	int main( int argc, char * argv[] ) {
220	FILE * input; // use FILE rather than istream because yyin is FILE
221	ostream * output = & cout;
222	list< Declaration * > translationUnit;
223
224	Signal( SIGSEGV, sigSegvBusHandler, SA_SIGINFO );
225	Signal( SIGBUS, sigSegvBusHandler, SA_SIGINFO );
226	Signal( SIGFPE, sigFpeHandler, SA_SIGINFO );
227	Signal( SIGABRT, sigAbortHandler, SA_SIGINFO );
228
229	// cout << "main" << endl;
230	// for ( int i = 0; i < argc; i += 1 ) {
231	// cout << '\t' << argv[i] << endl;
232	// } // for
233
234	parse_cmdline( argc, argv ); // process command-line arguments
235	CodeGen::FixMain::setReplaceMain( !nomainp );
236
237	if ( waiting_for_gdb ) {
238	cerr << "Waiting for gdb" << endl;
239	cerr << "run :" << endl;
240	cerr << " gdb attach " << getpid() << endl;
241	raise(SIGSTOP);
242	} // if
243
244	try {
245	// choose to read the program from a file or stdin
246	if ( optind < argc ) { // any commands after the flags ? => input file name
247	input = fopen( argv[ optind ], "r" );
248	assertf( input, "cannot open %s because %s\n", argv[ optind ], strerror( errno ) );
249	optind += 1;
250	} else { // no input file name
251	input = stdin;
252	} // if
253
254	Stats::Time::StartGlobal();
255	NewPass("Parse");
256	Stats::Time::StartBlock("Parse");
257
258	// read in the builtins, extras, and the prelude
259	if ( ! nopreludep ) { // include gcc builtins
260	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
261
262	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
263
264	// Read to gcc builtins, if not generating the cfa library
265	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cf").c_str(), "r" );
266	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
267	parse( gcc_builtins, LinkageSpec::Compiler );
268
269	// read the extra prelude in, if not generating the cfa library
270	FILE * extras = fopen( (PreludeDirector + "/extras.cf").c_str(), "r" );
271	assertf( extras, "cannot open extras.cf\n" );
272	parse( extras, LinkageSpec::BuiltinC );
273
274	if ( ! libcfap ) {
275	// read the prelude in, if not generating the cfa library
276	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
277	assertf( prelude, "cannot open prelude.cfa\n" );
278	parse( prelude, LinkageSpec::Intrinsic );
279
280	// Read to cfa builtins, if not generating the cfa library
281	FILE * builtins = fopen( (PreludeDirector + "/builtins.cf").c_str(), "r" );
282	assertf( builtins, "cannot open builtins.cf\n" );
283	parse( builtins, LinkageSpec::BuiltinCFA );
284	} // if
285	} // if
286
287	parse( input, libcfap ? LinkageSpec::Intrinsic : LinkageSpec::Cforall, yydebug );
288
289	if ( parsep ) {
290	parseTree->printList( cout );
291	delete parseTree;
292	return EXIT_SUCCESS;
293	} // if
294
295	buildList( parseTree, translationUnit );
296	delete parseTree;
297	parseTree = nullptr;
298
299	if ( astp ) {
300	dump( translationUnit );
301	return EXIT_SUCCESS;
302	} // if
303
304	// Temporary: fill locations after parsing so that every node has a location, for early error messages.
305	// Eventually we should pass the locations from the parser to every node, but this quick and dirty solution
306	// works okay for now.
307	CodeTools::fillLocations( translationUnit );
308	Stats::Time::StopBlock();
309
310	PASS( "Translate Exception Declarations", ControlStruct::translateExcept( translationUnit ) );
311	if ( exdeclp ) {
312	dump( translationUnit );
313	return EXIT_SUCCESS;
314	} // if
315
316	// add the assignment statement after the initialization of a type parameter
317	PASS( "Validate", SymTab::validate( translationUnit, symtabp ) );
318	if ( symtabp ) {
319	deleteAll( translationUnit );
320	return EXIT_SUCCESS;
321	} // if
322
323	if ( expraltp ) {
324	PassVisitor<ResolvExpr::AlternativePrinter> printer( cout );
325	acceptAll( translationUnit, printer );
326	return EXIT_SUCCESS;
327	} // if
328
329	if ( validp ) {
330	dump( translationUnit );
331	return EXIT_SUCCESS;
332	} // if
333
334	PASS( "Translate Throws", ControlStruct::translateThrows( translationUnit ) );
335	PASS( "Fix Labels", ControlStruct::fixLabels( translationUnit ) );
336	PASS( "Fix Names", CodeGen::fixNames( translationUnit ) );
337	PASS( "Gen Init", InitTweak::genInit( translationUnit ) );
338
339	if ( libcfap ) {
340	// generate the bodies of cfa library functions
341	LibCfa::makeLibCfa( translationUnit );
342	} // if
343
344	CodeTools::fillLocations( translationUnit );
345
346	if( useNewAST ) {
347	if (Stats::Counters::enabled) {
348	ast::pass_visitor_stats.avg = Stats::Counters::build<Stats::Counters::AverageCounter<double>>("Average Depth - New");
349	ast::pass_visitor_stats.max = Stats::Counters::build<Stats::Counters::MaxCounter<double>>("Max depth - New");
350	}
351	auto transUnit = convert( move( translationUnit ) );
352
353	forceFillCodeLocations( transUnit );
354
355	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( transUnit ) );
356
357	// LibCfa::makeLibCfa
358
359	if ( declstatsp ) {
360	printDeclStats( transUnit );
361	return EXIT_SUCCESS;
362	} // if
363
364	if ( bresolvep ) {
365	dump( move( transUnit ) );
366	return EXIT_SUCCESS;
367	} // if
368
369	if ( resolvprotop ) {
370	// TODO: Better error message.
371	assert(false);
372	return EXIT_SUCCESS;
373	} // if
374
375	PASS( "Resolve", ResolvExpr::resolve( transUnit ) );
376	if ( exprp ) {
377	dump( move( transUnit ) );
378	return EXIT_SUCCESS;
379	} // if
380
381	forceFillCodeLocations( transUnit );
382
383	PASS( "Fix Init", InitTweak::fix(transUnit, buildingLibrary()));
384	translationUnit = convert( move( transUnit ) );
385	} else {
386	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( translationUnit ) );
387
388	// LibCfa::makeLibCfa
389
390	if ( declstatsp ) {
391	CodeTools::printDeclStats( translationUnit );
392	deleteAll( translationUnit );
393	return EXIT_SUCCESS;
394	} // if
395
396	if ( bresolvep ) {
397	dump( translationUnit );
398	return EXIT_SUCCESS;
399	} // if
400
401	CodeTools::fillLocations( translationUnit );
402
403	if ( resolvprotop ) {
404	CodeTools::dumpAsResolvProto( translationUnit );
405	return EXIT_SUCCESS;
406	} // if
407
408	PASS( "Resolve", ResolvExpr::resolve( translationUnit ) );
409	if ( exprp ) {
410	dump( translationUnit );
411	return EXIT_SUCCESS;
412	}
413
414	PASS( "Fix Init", InitTweak::fix( translationUnit, buildingLibrary() ) );
415	}
416
417	// fix ObjectDecl - replaces ConstructorInit nodes
418	if ( ctorinitp ) {
419	dump ( translationUnit );
420	return EXIT_SUCCESS;
421	} // if
422
423	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
424
425	PASS( "Translate Tries" , ControlStruct::translateTries( translationUnit ) );
426
427	PASS( "Gen Waitfor" , Concurrency::generateWaitFor( translationUnit ) );
428
429	PASS( "Convert Specializations", GenPoly::convertSpecializations( translationUnit ) ); // needs to happen before tuple types are expanded
430
431	PASS( "Expand Tuples", Tuples::expandTuples( translationUnit ) ); // xxx - is this the right place for this?
432
433	if ( tuplep ) {
434	dump( translationUnit );
435	return EXIT_SUCCESS;
436	} // if
437
438	PASS( "Virtual Expand Casts", Virtual::expandCasts( translationUnit ) ); // Must come after translateEHM
439
440	PASS( "Instantiate Generics", GenPoly::instantiateGeneric( translationUnit ) );
441	if ( genericsp ) {
442	dump( translationUnit );
443	return EXIT_SUCCESS;
444	} // if
445
446	PASS( "Convert L-Value", GenPoly::convertLvalue( translationUnit ) );
447
448	if ( bboxp ) {
449	dump( translationUnit );
450	return EXIT_SUCCESS;
451	} // if
452	PASS( "Box", GenPoly::box( translationUnit ) );
453
454	PASS( "Link-Once", CodeGen::translateLinkOnce( translationUnit ) );
455
456	// Code has been lowered to C, now we can start generation.
457
458	if ( bcodegenp ) {
459	dump( translationUnit );
460	return EXIT_SUCCESS;
461	} // if
462
463	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
464	output = new ofstream( argv[ optind ] );
465	} // if
466
467	CodeTools::fillLocations( translationUnit );
468	PASS( "Code Gen", CodeGen::generate( translationUnit, *output, ! genproto, prettycodegenp, true, linemarks ) );
469
470	CodeGen::FixMain::fix( *output, (PreludeDirector + "/bootloader.c").c_str() );
471	if ( output != &cout ) {
472	delete output;
473	} // if
474	} catch ( SemanticErrorException & e ) {
475	if ( errorp ) {
476	cerr << "---AST at error:---" << endl;
477	dump( translationUnit, cerr );
478	cerr << endl << "---End of AST, begin error message:---\n" << endl;
479	} // if
480	e.print();
481	if ( output != &cout ) {
482	delete output;
483	} // if
484	return EXIT_FAILURE;
485	} catch ( UnimplementedError & e ) {
486	cout << "Sorry, " << e.get_what() << " is not currently implemented" << endl;
487	if ( output != &cout ) {
488	delete output;
489	} // if
490	return EXIT_FAILURE;
491	} catch ( CompilerError & e ) {
492	cerr << "Compiler Error: " << e.get_what() << endl;
493	cerr << "(please report bugs to [REDACTED])" << endl;
494	if ( output != &cout ) {
495	delete output;
496	} // if
497	return EXIT_FAILURE;
498	} catch ( std::bad_alloc & ) {
499	cerr << "cfa-cpp compilation error std::bad_alloc" << endl;
500	backtrace( 1 );
501	abort();
502	} catch ( ... ) {
503	exception_ptr eptr = current_exception();
504	try {
505	if (eptr) {
506	rethrow_exception(eptr);
507	} else {
508	cerr << "cfa-cpp compilation error exception uncaught and unknown" << endl;
509	} // if
510	} catch( const exception & e ) {
511	cerr << "cfa-cpp compilation error uncaught exception \"" << e.what() << "\"\n";
512	} // try
513	return EXIT_FAILURE;
514	} // try
515
516	deleteAll( translationUnit );
517	Stats::print();
518	return EXIT_SUCCESS;
519	} // main
520
521
522	static const char optstring[] = ":c:ghlLmNnpdOAP:S:twW:D:";
523
524	enum { PreludeDir = 128 };
525	static struct option long_opts[] = {
526	{ "colors", required_argument, nullptr, 'c' },
527	{ "gdb", no_argument, nullptr, 'g' },
528	{ "help", no_argument, nullptr, 'h' },
529	{ "libcfa", no_argument, nullptr, 'l' },
530	{ "linemarks", no_argument, nullptr, 'L' },
531	{ "no-main", no_argument, 0, 'm' },
532	{ "no-linemarks", no_argument, nullptr, 'N' },
533	{ "no-prelude", no_argument, nullptr, 'n' },
534	{ "prototypes", no_argument, nullptr, 'p' },
535	{ "deterministic-out", no_argument, nullptr, 'd' },
536	{ "old-ast", no_argument, nullptr, 'O'},
537	{ "new-ast", no_argument, nullptr, 'A'},
538	{ "print", required_argument, nullptr, 'P' },
539	{ "prelude-dir", required_argument, nullptr, PreludeDir },
540	{ "statistics", required_argument, nullptr, 'S' },
541	{ "tree", no_argument, nullptr, 't' },
542	{ "", no_argument, nullptr, 0 }, // -w
543	{ "", no_argument, nullptr, 0 }, // -W
544	{ "", no_argument, nullptr, 0 }, // -D
545	{ nullptr, 0, nullptr, 0 }
546	}; // long_opts
547
548	static const char * description[] = {
549	"diagnostic color: never, always, auto", // -c
550	"wait for gdb to attach", // -g
551	"print translator help message", // -h
552	"generate libcfa.c", // -l
553	"generate line marks", // -L
554	"do not replace main", // -m
555	"do not generate line marks", // -N
556	"do not read prelude", // -n
557	"do not generate prelude prototypes => prelude not printed", // -p
558	"only print deterministic output", // -d
559	"Use the old-ast", // -O
560	"Use the new-ast", // -A
561	"print", // -P
562	"<directory> prelude directory for debug/nodebug", // no flag
563	"<option-list> enable profiling information: counters, heap, time, all, none", // -S
564	"building cfa standard lib", // -t
565	"", // -w
566	"", // -W
567	"", // -D
568	}; // description
569
570	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
571
572	static struct Printopts {
573	const char * name;
574	int & flag;
575	int val;
576	const char * descript;
577	} printopts[] = {
578	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
579	{ "asterr", errorp, true, "print AST on error" },
580	{ "declstats", declstatsp, true, "code property statistics" },
581	{ "parse", yydebug, true, "yacc (parsing) debug information" },
582	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
583	{ "rproto", resolvprotop, true, "resolver-proto instance" },
584	{ "rsteps", resolvep, true, "print resolver steps" },
585	{ "tree", parsep, true, "print parse tree" },
586	// code dumps
587	{ "ast", astp, true, "print AST after parsing" },
588	{ "exdecl", exdeclp, true, "print AST after translating exception decls" },
589	{ "symevt", symtabp, true, "print AST after symbol table events" },
590	{ "altexpr", expraltp, true, "print alternatives for expressions" },
591	{ "astdecl", validp, true, "print AST after declaration validation pass" },
592	{ "resolver", bresolvep, true, "print AST before resolver step" },
593	{ "astexpr", exprp, true, "print AST after expression analysis" },
594	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
595	{ "tuple", tuplep, true, "print AST after tuple expansion" },
596	{ "astgen", genericsp, true, "print AST after instantiate generics" },
597	{ "box", bboxp, true, "print AST before box step" },
598	{ "codegen", bcodegenp, true, "print AST before code generation" },
599	};
600	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
601
602	static void usage( char * argv[] ) {
603	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
604	int i = 0, j = 1; // j skips starting colon
605	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
606	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
607	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
608	cout << " -" << optstring[j] << ",";
609	} else { // no flag
610	j -= 1; // compensate
611	cout << " ";
612	} // if
613	cout << " --" << left << setw(12) << long_opts[i].name << " ";
614	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
615	cout << "one of: " << endl;
616	for ( int i = 0; i < printoptsSize; i += 1 ) {
617	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
618	} // for
619	} else {
620	cout << description[i] << endl;
621	} // if
622	} // if
623	if ( optstring[j + 1] == ':' ) j += 1;
624	} // for
625	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
626	exit( EXIT_FAILURE );
627	} // usage
628
629	static void parse_cmdline( int argc, char * argv[] ) {
630	opterr = 0; // (global) prevent getopt from printing error messages
631
632	bool Wsuppress = false, Werror = false;
633	int c;
634	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
635	switch ( c ) {
636	case 'c': // diagnostic colors
637	if ( strcmp( optarg, "always" ) == 0 ) {
638	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
639	} else if ( strcmp( optarg, "never" ) == 0 ) {
640	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
641	} else if ( strcmp( optarg, "auto" ) == 0 ) {
642	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
643	} // if
644	break;
645	case 'h': // help message
646	usage( argv ); // no return
647	break;
648	case 'l': // generate libcfa.c
649	libcfap = true;
650	break;
651	case 'L': // generate line marks
652	linemarks = true;
653	break;
654	case 'm': // do not replace main
655	nomainp = true;
656	break;
657	case 'N': // do not generate line marks
658	linemarks = false;
659	break;
660	case 'n': // do not read prelude
661	nopreludep = true;
662	break;
663	case 'p': // generate prototypes for prelude functions
664	genproto = true;
665	break;
666	case 'd': // don't print non-deterministic output
667	deterministic_output = true;
668	break;
669	case 'O': // don't print non-deterministic output
670	useNewAST = false;
671	break;
672	case 'A': // don't print non-deterministic output
673	useNewAST = true;
674	break;
675	case 'P': // print options
676	for ( int i = 0;; i += 1 ) {
677	if ( i == printoptsSize ) {
678	cout << "Unknown --print option " << optarg << endl;
679	goto Default;
680	} // if
681	if ( strcmp( optarg, printopts[i].name ) == 0 ) {
682	printopts[i].flag = printopts[i].val;
683	break;
684	} // if
685	} // for
686	break;
687	case PreludeDir: // prelude directory for debug/nodebug, hidden
688	PreludeDirector = optarg;
689	break;
690	case 'S': // enable profiling information, argument comma separated list of names
691	Stats::parse_params( optarg );
692	break;
693	case 't': // building cfa stdlib
694	treep = true;
695	break;
696	case 'g': // wait for gdb
697	waiting_for_gdb = true;
698	break;
699	case 'w': // suppress all warnings, hidden
700	Wsuppress = true;
701	break;
702	case 'W': // coordinate gcc -W with CFA, hidden
703	if ( strcmp( optarg, "all" ) == 0 ) {
704	SemanticWarning_EnableAll();
705	} else if ( strcmp( optarg, "error" ) == 0 ) {
706	Werror = true;
707	} else {
708	char * warning = optarg;
709	Severity s;
710	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
711	warning += 3;
712	s = Severity::Suppress;
713	} else {
714	s = Severity::Warn;
715	} // if
716	SemanticWarning_Set( warning, s );
717	} // if
718	break;
719	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
720	break;
721	case '?': // unknown option
722	if ( optopt ) { // short option ?
723	cout << "Unknown option -" << (char)optopt << endl;
724	} else {
725	cout << "Unknown option " << argv[optind - 1] << endl;
726	} // if
727	goto Default;
728	case ':': // missing option
729	if ( optopt ) { // short option ?
730	cout << "Missing option for -" << (char)optopt << endl;
731	} else {
732	cout << "Missing option for " << argv[optind - 1] << endl;
733	} // if
734	goto Default;
735	Default:
736	default:
737	usage( argv ); // no return
738	} // switch
739	} // while
740
741	if ( Werror ) {
742	SemanticWarning_WarningAsError();
743	} // if
744	if ( Wsuppress ) {
745	SemanticWarning_SuppressAll();
746	} // if
747	// for ( const auto w : WarningFormats ) {
748	// cout << w.name << ' ' << (int)w.severity << endl;
749	// } // for
750	} // parse_cmdline
751
752	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit ) {
753	extern int yyparse( void );
754	extern FILE * yyin;
755	extern int yylineno;
756
757	::linkage = linkage; // set globals
758	yyin = input;
759	yylineno = 1;
760	int parseStatus = yyparse();
761
762	fclose( input );
763	if ( shouldExit \|\| parseStatus != 0 ) {
764	exit( parseStatus );
765	} // if
766	} // parse
767
768	static bool notPrelude( Declaration * decl ) {
769	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
770	} // notPrelude
771
772	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
773	list< Declaration * > decls;
774
775	if ( genproto ) {
776	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
777	} else {
778	decls = translationUnit;
779	} // if
780
781	// depending on commandline options, either generate code or dump the AST
782	if ( codegenp ) {
783	CodeGen::generate( decls, out, ! genproto, prettycodegenp );
784	} else {
785	printAll( decls, out );
786	} // if
787	deleteAll( translationUnit );
788	} // dump
789
790	static void dump( ast::TranslationUnit && transUnit, ostream & out ) {
791	std::list< Declaration * > translationUnit = convert( move( transUnit ) );
792	dump( translationUnit, out );
793	}
794
795	// Local Variables: //
796	// tab-width: 4 //
797	// mode: c++ //
798	// compile-command: "make install" //
799	// End: //

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