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source: src/main.cc @ d912bed

ADTarm-ehast-experimentalenumforall-pointer-decayjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprpthread-emulationqualifiedEnum

Last change on this file since d912bed was bffcd66, checked in by Peter A. Buhr <pabuhr@…>, 4 years ago
harmonize signal handling in main.cc with interpose.cfa, consider refactoring all signal code into a separate module
Property mode set to `100644`
File size: 24.6 KB

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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 : Peter A. Buhr
12	// Last Modified On : Fri Dec 13 23:47:06 2019
13	// Update Count : 626
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
34	#include "CompilationState.h"
35	#include "../config.h" // for CFA_LIBDIR
36	#include "CodeGen/FixMain.h" // for FixMain
37	#include "CodeGen/FixNames.h" // for fixNames
38	#include "CodeGen/Generate.h" // for generate
39	#include "CodeTools/DeclStats.h" // for printDeclStats
40	#include "CodeTools/ResolvProtoDump.h" // for dumpAsResolvProto
41	#include "CodeTools/TrackLoc.h" // for fillLocations
42	#include "Common/CompilerError.h" // for CompilerError
43	#include "Common/Stats.h"
44	#include "Common/PassVisitor.h"
45	#include "Common/SemanticError.h" // for SemanticError
46	#include "Common/UnimplementedError.h" // for UnimplementedError
47	#include "Common/utility.h" // for deleteAll, filter, printAll
48	#include "Concurrency/Waitfor.h" // for generateWaitfor
49	#include "ControlStruct/ExceptTranslate.h" // for translateEHM
50	#include "ControlStruct/Mutate.h" // for mutate
51	#include "GenPoly/Box.h" // for box
52	#include "GenPoly/InstantiateGeneric.h" // for instantiateGeneric
53	#include "GenPoly/Lvalue.h" // for convertLvalue
54	#include "GenPoly/Specialize.h" // for convertSpecializations
55	#include "InitTweak/FixInit.h" // for fix
56	#include "InitTweak/GenInit.h" // for genInit
57	#include "MakeLibCfa.h" // for makeLibCfa
58	#include "Parser/ParseNode.h" // for DeclarationNode, buildList
59	#include "Parser/TypedefTable.h" // for TypedefTable
60	#include "ResolvExpr/AlternativePrinter.h" // for AlternativePrinter
61	#include "ResolvExpr/Resolver.h" // for resolve
62	#include "SymTab/Validate.h" // for validate
63	#include "SynTree/LinkageSpec.h" // for Spec, Cforall, Intrinsic
64	#include "SynTree/Declaration.h" // for Declaration
65	#include "SynTree/Visitor.h" // for acceptAll
66	#include "Tuples/Tuples.h" // for expandMemberTuples, expan...
67	#include "Virtual/ExpandCasts.h" // for expandCasts
68
69
70	static void NewPass( const char * const name ) {
71	Stats::Heap::newPass( name );
72	using namespace Stats::Counters;
73	{
74	static auto group = build<CounterGroup>( "Pass Visitor" );
75	auto pass = build<CounterGroup>( name, group );
76	pass_visitor_stats.depth = 0;
77	pass_visitor_stats.avg = build<AverageCounter<double>>( "Average Depth", pass );
78	pass_visitor_stats.max = build<MaxCounter<double>>( "Max Depth", pass );
79	}
80	{
81	static auto group = build<CounterGroup>( "Syntax Node" );
82	auto pass = build<CounterGroup>( name, group );
83	BaseSyntaxNode::new_nodes = build<SimpleCounter>( "Allocs", pass );
84	}
85	}
86
87	#define PASS( name, pass ) \
88	if ( errorp ) { cerr << name << endl; } \
89	NewPass(name); \
90	Stats::Time::StartBlock(name); \
91	pass; \
92	Stats::Time::StopBlock();
93
94	LinkageSpec::Spec linkage = LinkageSpec::Cforall;
95	TypedefTable typedefTable;
96	DeclarationNode * parseTree = nullptr; // program parse tree
97
98	static bool waiting_for_gdb = false; // flag to set cfa-cpp to wait for gdb on start
99
100	static string PreludeDirector = "";
101
102	static void parse_cmdline( int argc, char *argv[] );
103	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit = false );
104	static void dump( list< Declaration * > & translationUnit, ostream & out = cout );
105
106	static void backtrace( int start ) { // skip first N stack frames
107	enum { Frames = 50 };
108	void * array[Frames];
109	int size = ::backtrace( array, Frames );
110	char ** messages = ::backtrace_symbols( array, size ); // does not demangle names
111
112	*index( messages[0], '(' ) = '\0'; // find executable name
113	cerr << "Stack back trace for: " << messages[0] << endl;
114
115	// skip last 2 stack frames after main
116	for ( int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
117	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
118	for ( char p = messages[i]; p; ++p ) { // find parantheses and +offset
119	if ( *p == '(' ) {
120	mangled_name = p;
121	} else if ( *p == '+' ) {
122	offset_begin = p;
123	} else if ( *p == ')' ) {
124	offset_end = p;
125	break;
126	} // if
127	} // for
128
129	// if line contains symbol, attempt to demangle
130	int frameNo = i - start;
131	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
132	*mangled_name++ = '\0'; // delimit strings
133	*offset_begin++ = '\0';
134	*offset_end++ = '\0';
135
136	int status;
137	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
138	// bug in __cxa_demangle for single-character lower-case non-mangled names
139	if ( status == 0 ) { // demangling successful ?
140	cerr << "(" << frameNo << ") " << messages[i] << " : "
141	<< real_name << "+" << offset_begin << offset_end << endl;
142	} else { // otherwise, output mangled name
143	cerr << "(" << frameNo << ") " << messages[i] << " : "
144	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
145	} // if
146
147	free( real_name );
148	} else { // otherwise, print the whole line
149	cerr << "(" << frameNo << ") " << messages[i] << endl;
150	} // if
151	} // for
152
153	free( messages );
154	} // backtrace
155
156	#define SIGPARMS int sig __attribute__(( unused )), siginfo_t * sfp __attribute__(( unused )), ucontext_t * cxt __attribute__(( unused ))
157
158	static void Signal( int sig, void (*handler)(SIGPARMS), int flags ) {
159	struct sigaction act;
160
161	act.sa_sigaction = (void ()(int, siginfo_t , void *))handler;
162	sigemptyset( &act.sa_mask );
163	sigaddset( &act.sa_mask, SIGALRM ); // disabled during signal handler
164	sigaddset( &act.sa_mask, SIGUSR1 );
165	act.sa_flags = flags;
166
167	if ( sigaction( sig, &act, nullptr ) == -1 ) {
168	cerr << "CFA runtime error problem installing signal handler, error(" << errno << ") " << strerror( errno ) << endl;
169	_exit( EXIT_FAILURE );
170	} // if
171	} // Signal
172
173	static void sigSegvBusHandler( SIGPARMS ) {
174	if ( sfp->si_addr == nullptr ) {
175	cerr << "Null pointer (nullptr) dereference." << endl;
176	} else {
177	cerr << (sig == SIGSEGV ? "Segment fault" : "Bus error") << " at memory location " << sfp->si_addr << "." << endl
178	<< "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;
179	} // if
180	backtrace( 2 ); // skip first 2 stack frames
181	abort(); // cause core dump for debugging
182	} // sigSegvBusHandler
183
184	static void sigAbortHandler( SIGPARMS ) {
185	backtrace( 6 ); // skip first 6 stack frames
186	Signal( SIGABRT, (void (*)(SIGPARMS))SIG_DFL, SA_SIGINFO ); // reset default signal handler
187	raise( SIGABRT ); // reraise SIGABRT
188	} // sigAbortHandler
189
190	int main( int argc, char * argv[] ) {
191	FILE * input; // use FILE rather than istream because yyin is FILE
192	ostream * output = & cout;
193	list< Declaration * > translationUnit;
194
195	Signal( SIGSEGV, sigSegvBusHandler, SA_SIGINFO );
196	Signal( SIGBUS, sigSegvBusHandler, SA_SIGINFO );
197	Signal( SIGABRT, sigAbortHandler, SA_SIGINFO );
198
199	// cout << "main" << endl;
200	// for ( int i = 0; i < argc; i += 1 ) {
201	// cout << '\t' << argv[i] << endl;
202	// } // for
203
204	parse_cmdline( argc, argv ); // process command-line arguments
205	CodeGen::FixMain::setReplaceMain( !nomainp );
206
207	if ( waiting_for_gdb ) {
208	cerr << "Waiting for gdb" << endl;
209	cerr << "run :" << endl;
210	cerr << " gdb attach " << getpid() << endl;
211	raise(SIGSTOP);
212	} // if
213
214	try {
215	// choose to read the program from a file or stdin
216	if ( optind < argc ) { // any commands after the flags ? => input file name
217	input = fopen( argv[ optind ], "r" );
218	assertf( input, "cannot open %s because %s\n", argv[ optind ], strerror( errno ) );
219	optind += 1;
220	} else { // no input file name
221	input = stdin;
222	} // if
223
224	Stats::Time::StartGlobal();
225	NewPass("Parse");
226	Stats::Time::StartBlock("Parse");
227
228	// read in the builtins, extras, and the prelude
229	if ( ! nopreludep ) { // include gcc builtins
230	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
231
232	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
233
234	// Read to gcc builtins, if not generating the cfa library
235	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cf").c_str(), "r" );
236	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
237	parse( gcc_builtins, LinkageSpec::Compiler );
238
239	// read the extra prelude in, if not generating the cfa library
240	FILE * extras = fopen( (PreludeDirector + "/extras.cf").c_str(), "r" );
241	assertf( extras, "cannot open extras.cf\n" );
242	parse( extras, LinkageSpec::BuiltinC );
243
244	if ( ! libcfap ) {
245	// read the prelude in, if not generating the cfa library
246	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
247	assertf( prelude, "cannot open prelude.cfa\n" );
248	parse( prelude, LinkageSpec::Intrinsic );
249
250	// Read to cfa builtins, if not generating the cfa library
251	FILE * builtins = fopen( (PreludeDirector + "/builtins.cf").c_str(), "r" );
252	assertf( builtins, "cannot open builtins.cf\n" );
253	parse( builtins, LinkageSpec::BuiltinCFA );
254	} // if
255	} // if
256
257	parse( input, libcfap ? LinkageSpec::Intrinsic : LinkageSpec::Cforall, yydebug );
258
259	if ( parsep ) {
260	parseTree->printList( cout );
261	delete parseTree;
262	return EXIT_SUCCESS;
263	} // if
264
265	buildList( parseTree, translationUnit );
266	delete parseTree;
267	parseTree = nullptr;
268
269	if ( astp ) {
270	dump( translationUnit );
271	return EXIT_SUCCESS;
272	} // if
273
274	// Temporary: fill locations after parsing so that every node has a location, for early error messages.
275	// Eventually we should pass the locations from the parser to every node, but this quick and dirty solution
276	// works okay for now.
277	CodeTools::fillLocations( translationUnit );
278	Stats::Time::StopBlock();
279
280	// add the assignment statement after the initialization of a type parameter
281	PASS( "Validate", SymTab::validate( translationUnit, symtabp ) );
282	if ( symtabp ) {
283	deleteAll( translationUnit );
284	return EXIT_SUCCESS;
285	} // if
286
287	if ( expraltp ) {
288	PassVisitor<ResolvExpr::AlternativePrinter> printer( cout );
289	acceptAll( translationUnit, printer );
290	return EXIT_SUCCESS;
291	} // if
292
293	if ( validp ) {
294	dump( translationUnit );
295	return EXIT_SUCCESS;
296	} // if
297
298	PASS( "Fix Labels", ControlStruct::fixLabels( translationUnit ) );
299	PASS( "Fix Names", CodeGen::fixNames( translationUnit ) );
300	PASS( "Gen Init", InitTweak::genInit( translationUnit ) );
301	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( translationUnit ) );
302	if ( libcfap ) {
303	// generate the bodies of cfa library functions
304	LibCfa::makeLibCfa( translationUnit );
305	} // if
306
307	if ( declstatsp ) {
308	CodeTools::printDeclStats( translationUnit );
309	deleteAll( translationUnit );
310	return EXIT_SUCCESS;
311	} // if
312
313	if ( bresolvep ) {
314	dump( translationUnit );
315	return EXIT_SUCCESS;
316	} // if
317
318	CodeTools::fillLocations( translationUnit );
319
320	if ( resolvprotop ) {
321	CodeTools::dumpAsResolvProto( translationUnit );
322	return EXIT_SUCCESS;
323	} // if
324
325	PASS( "Resolve", ResolvExpr::resolve( translationUnit ) );
326	if ( exprp ) {
327	dump( translationUnit );
328	return EXIT_SUCCESS;
329	} // if
330
331	// fix ObjectDecl - replaces ConstructorInit nodes
332	PASS( "Fix Init", InitTweak::fix( translationUnit, buildingLibrary() ) );
333	if ( ctorinitp ) {
334	dump ( translationUnit );
335	return EXIT_SUCCESS;
336	} // if
337
338	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
339
340	PASS( "Translate EHM" , ControlStruct::translateEHM( translationUnit ) );
341
342	PASS( "Gen Waitfor" , Concurrency::generateWaitFor( translationUnit ) );
343
344	PASS( "Convert Specializations", GenPoly::convertSpecializations( translationUnit ) ); // needs to happen before tuple types are expanded
345
346	PASS( "Expand Tuples", Tuples::expandTuples( translationUnit ) ); // xxx - is this the right place for this?
347
348	if ( tuplep ) {
349	dump( translationUnit );
350	return EXIT_SUCCESS;
351	} // if
352
353	PASS( "Virtual Expand Casts", Virtual::expandCasts( translationUnit ) ); // Must come after translateEHM
354
355	PASS( "Instantiate Generics", GenPoly::instantiateGeneric( translationUnit ) );
356	if ( genericsp ) {
357	dump( translationUnit );
358	return EXIT_SUCCESS;
359	} // if
360
361	PASS( "Convert L-Value", GenPoly::convertLvalue( translationUnit ) );
362
363	if ( bboxp ) {
364	dump( translationUnit );
365	return EXIT_SUCCESS;
366	} // if
367	PASS( "Box", GenPoly::box( translationUnit ) );
368
369	if ( bcodegenp ) {
370	dump( translationUnit );
371	return EXIT_SUCCESS;
372	} // if
373
374	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
375	output = new ofstream( argv[ optind ] );
376	} // if
377
378	CodeTools::fillLocations( translationUnit );
379	PASS( "Code Gen", CodeGen::generate( translationUnit, *output, ! genproto, prettycodegenp, true, linemarks ) );
380
381	CodeGen::FixMain::fix( *output, (PreludeDirector + "/bootloader.c").c_str() );
382	if ( output != &cout ) {
383	delete output;
384	} // if
385	} catch ( SemanticErrorException &e ) {
386	if ( errorp ) {
387	cerr << "---AST at error:---" << endl;
388	dump( translationUnit, cerr );
389	cerr << endl << "---End of AST, begin error message:---\n" << endl;
390	} // if
391	e.print();
392	if ( output != &cout ) {
393	delete output;
394	} // if
395	return EXIT_FAILURE;
396	} catch ( UnimplementedError &e ) {
397	cout << "Sorry, " << e.get_what() << " is not currently implemented" << endl;
398	if ( output != &cout ) {
399	delete output;
400	} // if
401	return EXIT_FAILURE;
402	} catch ( CompilerError &e ) {
403	cerr << "Compiler Error: " << e.get_what() << endl;
404	cerr << "(please report bugs to [REDACTED])" << endl;
405	if ( output != &cout ) {
406	delete output;
407	} // if
408	return EXIT_FAILURE;
409	} catch ( ... ) {
410	exception_ptr eptr = current_exception();
411	try {
412	if (eptr) {
413	rethrow_exception(eptr);
414	} else {
415	cerr << "Exception Uncaught and Unknown" << endl;
416	} // if
417	} catch(const exception& e) {
418	cerr << "Uncaught Exception \"" << e.what() << "\"\n";
419	} // try
420	return EXIT_FAILURE;
421	} // try
422
423	deleteAll( translationUnit );
424	Stats::print();
425	return EXIT_SUCCESS;
426	} // main
427
428
429	static const char optstring[] = ":c:ghlLmNnpP:S:twW:D:";
430
431	enum { PreludeDir = 128 };
432	static struct option long_opts[] = {
433	{ "colors", required_argument, nullptr, 'c' },
434	{ "gdb", no_argument, nullptr, 'g' },
435	{ "help", no_argument, nullptr, 'h' },
436	{ "libcfa", no_argument, nullptr, 'l' },
437	{ "linemarks", no_argument, nullptr, 'L' },
438	{ "no-main", no_argument, 0, 'm' },
439	{ "no-linemarks", no_argument, nullptr, 'N' },
440	{ "no-prelude", no_argument, nullptr, 'n' },
441	{ "prototypes", no_argument, nullptr, 'p' },
442	{ "print", required_argument, nullptr, 'P' },
443	{ "prelude-dir", required_argument, nullptr, PreludeDir },
444	{ "statistics", required_argument, nullptr, 'S' },
445	{ "tree", no_argument, nullptr, 't' },
446	{ "", no_argument, nullptr, 0 }, // -w
447	{ "", no_argument, nullptr, 0 }, // -W
448	{ "", no_argument, nullptr, 0 }, // -D
449	{ nullptr, 0, nullptr, 0 }
450	}; // long_opts
451
452	static const char * description[] = {
453	"diagnostic color: never, always, or auto.", // -c
454	"wait for gdb to attach", // -g
455	"print help message", // -h
456	"generate libcfa.c", // -l
457	"generate line marks", // -L
458	"do not replace main", // -m
459	"do not generate line marks", // -N
460	"do not read prelude", // -n
461	"generate prototypes for prelude functions", // -p
462	"print", // -P
463	"<directory> prelude directory for debug/nodebug", // no flag
464	"<option-list> enable profiling information:\n counters,heap,time,all,none", // -S
465	"building cfa standard lib", // -t
466	"", // -w
467	"", // -W
468	"", // -D
469	}; // description
470
471	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
472
473	static struct Printopts {
474	const char * name;
475	int & flag;
476	int val;
477	const char * descript;
478	} printopts[] = {
479	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
480	{ "asterr", errorp, true, "print AST on error" },
481	{ "declstats", declstatsp, true, "code property statistics" },
482	{ "parse", yydebug, true, "yacc (parsing) debug information" },
483	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
484	{ "rproto", resolvprotop, true, "resolver-proto instance" },
485	{ "rsteps", resolvep, true, "print resolver steps" },
486	{ "tree", parsep, true, "print parse tree" },
487	// code dumps
488	{ "ast", astp, true, "print AST after parsing" },
489	{ "symevt", symtabp, true, "print AST after symbol table events" },
490	{ "altexpr", expraltp, true, "print alternatives for expressions" },
491	{ "astdecl", validp, true, "print AST after declaration validation pass" },
492	{ "resolver", bresolvep, true, "print AST before resolver step" },
493	{ "astexpr", exprp, true, "print AST after expression analysis" },
494	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
495	{ "tuple", tuplep, true, "print AST after tuple expansion" },
496	{ "astgen", genericsp, true, "print AST after instantiate generics" },
497	{ "box", bboxp, true, "print AST before box step" },
498	{ "codegen", bcodegenp, true, "print AST before code generation" },
499	};
500	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
501
502	static void usage( char *argv[] ) {
503	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
504	int i = 0, j = 1; // j skips starting colon
505	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
506	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
507	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
508	cout << " -" << optstring[j] << ",";
509	} else { // no flag
510	j -= 1; // compensate
511	cout << " ";
512	} // if
513	cout << " --" << left << setw(12) << long_opts[i].name << " ";
514	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
515	cout << "one of: " << endl;
516	for ( int i = 0; i < printoptsSize; i += 1 ) {
517	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
518	} // for
519	} else {
520	cout << description[i] << endl;
521	} // if
522	} // if
523	if ( optstring[j + 1] == ':' ) j += 1;
524	} // for
525	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
526	exit( EXIT_FAILURE );
527	} // usage
528
529	static void parse_cmdline( int argc, char * argv[] ) {
530	opterr = 0; // (global) prevent getopt from printing error messages
531
532	bool Wsuppress = false, Werror = false;
533	int c;
534	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
535	switch ( c ) {
536	case 'c': // diagnostic colors
537	if ( strcmp( optarg, "always" ) == 0 ) {
538	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
539	} else if ( strcmp( optarg, "never" ) == 0 ) {
540	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
541	} else if ( strcmp( optarg, "auto" ) == 0 ) {
542	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
543	} // if
544	break;
545	case 'h': // help message
546	usage( argv ); // no return
547	break;
548	case 'l': // generate libcfa.c
549	libcfap = true;
550	break;
551	case 'L': // generate line marks
552	linemarks = true;
553	break;
554	case 'm': // do not replace main
555	nomainp = true;
556	break;
557	case 'N': // do not generate line marks
558	linemarks = false;
559	break;
560	case 'n': // do not read prelude
561	nopreludep = true;
562	break;
563	case 'p': // generate prototypes for prelude functions
564	genproto = true;
565	break;
566	case 'P': // print options
567	for ( int i = 0;; i += 1 ) {
568	if ( i == printoptsSize ) {
569	cout << "Unknown --print option " << optarg << endl;
570	goto Default;
571	} // if
572	if ( strcmp( optarg, printopts[i].name ) == 0 ) {
573	printopts[i].flag = printopts[i].val;
574	break;
575	} // if
576	} // for
577	break;
578	case PreludeDir: // prelude directory for debug/nodebug, hidden
579	PreludeDirector = optarg;
580	break;
581	case 'S': // enable profiling information, argument comma separated list of names
582	Stats::parse_params( optarg );
583	break;
584	case 't': // building cfa stdlib
585	treep = true;
586	break;
587	case 'g': // wait for gdb
588	waiting_for_gdb = true;
589	break;
590	case 'w': // suppress all warnings, hidden
591	Wsuppress = true;
592	break;
593	case 'W': // coordinate gcc -W with CFA, hidden
594	if ( strcmp( optarg, "all" ) == 0 ) {
595	SemanticWarning_EnableAll();
596	} else if ( strcmp( optarg, "error" ) == 0 ) {
597	Werror = true;
598	} else {
599	char * warning = optarg;
600	Severity s;
601	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
602	warning += 3;
603	s = Severity::Suppress;
604	} else {
605	s = Severity::Warn;
606	} // if
607	SemanticWarning_Set( warning, s );
608	} // if
609	break;
610	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
611	break;
612	case '?': // unknown option
613	if ( optopt ) { // short option ?
614	cout << "Unknown option -" << (char)optopt << endl;
615	} else {
616	cout << "Unknown option " << argv[optind - 1] << endl;
617	} // if
618	goto Default;
619	case ':': // missing option
620	if ( optopt ) { // short option ?
621	cout << "Missing option for -" << (char)optopt << endl;
622	} else {
623	cout << "Missing option for " << argv[optind - 1] << endl;
624	} // if
625	goto Default;
626	Default:
627	default:
628	usage( argv ); // no return
629	} // switch
630	} // while
631
632	if ( Werror ) {
633	SemanticWarning_WarningAsError();
634	} // if
635	if ( Wsuppress ) {
636	SemanticWarning_SuppressAll();
637	} // if
638	// for ( const auto w : WarningFormats ) {
639	// cout << w.name << ' ' << (int)w.severity << endl;
640	// } // for
641	} // parse_cmdline
642
643	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit ) {
644	extern int yyparse( void );
645	extern FILE * yyin;
646	extern int yylineno;
647
648	::linkage = linkage; // set globals
649	yyin = input;
650	yylineno = 1;
651	int parseStatus = yyparse();
652
653	fclose( input );
654	if ( shouldExit \|\| parseStatus != 0 ) {
655	exit( parseStatus );
656	} // if
657	} // parse
658
659	static bool notPrelude( Declaration * decl ) {
660	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
661	} // notPrelude
662
663	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
664	list< Declaration * > decls;
665
666	if ( genproto ) {
667	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
668	} else {
669	decls = translationUnit;
670	} // if
671
672	// depending on commandline options, either generate code or dump the AST
673	if ( codegenp ) {
674	CodeGen::generate( decls, out, ! genproto, prettycodegenp );
675	} else {
676	printAll( decls, out );
677	} // if
678	deleteAll( translationUnit );
679	} // dump
680
681	// Local Variables: //
682	// tab-width: 4 //
683	// mode: c++ //
684	// compile-command: "make install" //
685	// End: //

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