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source: src/main.cc @ 9306559f

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

Last change on this file since 9306559f was 74330e7, checked in by Peter A. Buhr <pabuhr@…>, 4 years ago
formatting, add floating-point signal handler to cpp-cc to catch division by 0 in constant-expression evaluations
Property mode set to `100644`
File size: 25.2 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 Feb 8 08:33:50 2020
13	// Update Count : 633
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, }; // maximum number of stack frames
108	void * array[Frames];
109	size_t 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 ( unsigned int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
117	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
118
119	for ( char * p = messages[i]; *p; p += 1 ) { // find parantheses and +offset
120	if ( *p == '(' ) {
121	mangled_name = p;
122	} else if ( *p == '+' ) {
123	offset_begin = p;
124	} else if ( *p == ')' ) {
125	offset_end = p;
126	break;
127	} // if
128	} // for
129
130	// if line contains symbol, attempt to demangle
131	int frameNo = i - start;
132	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
133	*mangled_name++ = '\0'; // delimit strings
134	*offset_begin++ = '\0';
135	*offset_end++ = '\0';
136
137	int status;
138	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
139	// bug in __cxa_demangle for single-character lower-case non-mangled names
140	if ( status == 0 ) { // demangling successful ?
141	cerr << "(" << frameNo << ") " << messages[i] << " : "
142	<< real_name << "+" << offset_begin << offset_end << endl;
143	} else { // otherwise, output mangled name
144	cerr << "(" << frameNo << ") " << messages[i] << " : "
145	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
146	} // if
147
148	free( real_name );
149	} else { // otherwise, print the whole line
150	cerr << "(" << frameNo << ") " << messages[i] << endl;
151	} // if
152	} // for
153
154	free( messages );
155	} // backtrace
156
157	#define SIGPARMS int sig __attribute__(( unused )), siginfo_t * sfp __attribute__(( unused )), ucontext_t * cxt __attribute__(( unused ))
158
159	static void Signal( int sig, void (*handler)(SIGPARMS), int flags ) {
160	struct sigaction act;
161
162	act.sa_sigaction = (void ()(int, siginfo_t , void *))handler;
163	act.sa_flags = flags;
164
165	if ( sigaction( sig, &act, nullptr ) == -1 ) {
166	cerr << "CFA runtime error problem installing signal handler, error(" << errno << ") " << strerror( errno ) << endl;
167	_exit( EXIT_FAILURE );
168	} // if
169	} // Signal
170
171	static void sigSegvBusHandler( SIGPARMS ) {
172	if ( sfp->si_addr == nullptr ) {
173	cerr << "Null pointer (nullptr) dereference." << endl;
174	} else {
175	cerr << (sig == SIGSEGV ? "Segment fault" : "Bus error") << " at memory location " << sfp->si_addr << "." << endl
176	<< "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;
177	} // if
178	backtrace( 2 ); // skip first 2 stack frames
179	abort(); // cause core dump for debugging
180	} // sigSegvBusHandler
181
182	static void sigFpeHandler( SIGPARMS ) {
183	const char * msg;
184
185	switch ( sfp->si_code ) {
186	case FPE_INTDIV: case FPE_FLTDIV: msg = "divide by zero"; break;
187	case FPE_FLTOVF: msg = "overflow"; break;
188	case FPE_FLTUND: msg = "underflow"; break;
189	case FPE_FLTRES: msg = "inexact result"; break;
190	case FPE_FLTINV: msg = "invalid operation"; break;
191	default: msg = "unknown";
192	} // choose
193	cerr << "Computation error " << msg << " at location " << sfp->si_addr << endl
194	<< "Possible cause is constant-expression evaluation invalid." << endl;
195	backtrace( 2 ); // skip first 2 stack frames
196	abort(); // cause core dump for debugging
197	} // sigFpeHandler
198
199	static void sigAbortHandler( SIGPARMS ) {
200	backtrace( 6 ); // skip first 6 stack frames
201	Signal( SIGABRT, (void (*)(SIGPARMS))SIG_DFL, SA_SIGINFO ); // reset default signal handler
202	raise( SIGABRT ); // reraise SIGABRT
203	} // sigAbortHandler
204
205	int main( int argc, char * argv[] ) {
206	FILE * input; // use FILE rather than istream because yyin is FILE
207	ostream * output = & cout;
208	list< Declaration * > translationUnit;
209
210	Signal( SIGSEGV, sigSegvBusHandler, SA_SIGINFO );
211	Signal( SIGBUS, sigSegvBusHandler, SA_SIGINFO );
212	Signal( SIGFPE, sigFpeHandler, SA_SIGINFO );
213	Signal( SIGABRT, sigAbortHandler, SA_SIGINFO );
214
215	// cout << "main" << endl;
216	// for ( int i = 0; i < argc; i += 1 ) {
217	// cout << '\t' << argv[i] << endl;
218	// } // for
219
220	parse_cmdline( argc, argv ); // process command-line arguments
221	CodeGen::FixMain::setReplaceMain( !nomainp );
222
223	if ( waiting_for_gdb ) {
224	cerr << "Waiting for gdb" << endl;
225	cerr << "run :" << endl;
226	cerr << " gdb attach " << getpid() << endl;
227	raise(SIGSTOP);
228	} // if
229
230	try {
231	// choose to read the program from a file or stdin
232	if ( optind < argc ) { // any commands after the flags ? => input file name
233	input = fopen( argv[ optind ], "r" );
234	assertf( input, "cannot open %s because %s\n", argv[ optind ], strerror( errno ) );
235	optind += 1;
236	} else { // no input file name
237	input = stdin;
238	} // if
239
240	Stats::Time::StartGlobal();
241	NewPass("Parse");
242	Stats::Time::StartBlock("Parse");
243
244	// read in the builtins, extras, and the prelude
245	if ( ! nopreludep ) { // include gcc builtins
246	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
247
248	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
249
250	// Read to gcc builtins, if not generating the cfa library
251	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cf").c_str(), "r" );
252	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
253	parse( gcc_builtins, LinkageSpec::Compiler );
254
255	// read the extra prelude in, if not generating the cfa library
256	FILE * extras = fopen( (PreludeDirector + "/extras.cf").c_str(), "r" );
257	assertf( extras, "cannot open extras.cf\n" );
258	parse( extras, LinkageSpec::BuiltinC );
259
260	if ( ! libcfap ) {
261	// read the prelude in, if not generating the cfa library
262	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
263	assertf( prelude, "cannot open prelude.cfa\n" );
264	parse( prelude, LinkageSpec::Intrinsic );
265
266	// Read to cfa builtins, if not generating the cfa library
267	FILE * builtins = fopen( (PreludeDirector + "/builtins.cf").c_str(), "r" );
268	assertf( builtins, "cannot open builtins.cf\n" );
269	parse( builtins, LinkageSpec::BuiltinCFA );
270	} // if
271	} // if
272
273	parse( input, libcfap ? LinkageSpec::Intrinsic : LinkageSpec::Cforall, yydebug );
274
275	if ( parsep ) {
276	parseTree->printList( cout );
277	delete parseTree;
278	return EXIT_SUCCESS;
279	} // if
280
281	buildList( parseTree, translationUnit );
282	delete parseTree;
283	parseTree = nullptr;
284
285	if ( astp ) {
286	dump( translationUnit );
287	return EXIT_SUCCESS;
288	} // if
289
290	// Temporary: fill locations after parsing so that every node has a location, for early error messages.
291	// Eventually we should pass the locations from the parser to every node, but this quick and dirty solution
292	// works okay for now.
293	CodeTools::fillLocations( translationUnit );
294	Stats::Time::StopBlock();
295
296	// add the assignment statement after the initialization of a type parameter
297	PASS( "Validate", SymTab::validate( translationUnit, symtabp ) );
298	if ( symtabp ) {
299	deleteAll( translationUnit );
300	return EXIT_SUCCESS;
301	} // if
302
303	if ( expraltp ) {
304	PassVisitor<ResolvExpr::AlternativePrinter> printer( cout );
305	acceptAll( translationUnit, printer );
306	return EXIT_SUCCESS;
307	} // if
308
309	if ( validp ) {
310	dump( translationUnit );
311	return EXIT_SUCCESS;
312	} // if
313
314	PASS( "Fix Labels", ControlStruct::fixLabels( translationUnit ) );
315	PASS( "Fix Names", CodeGen::fixNames( translationUnit ) );
316	PASS( "Gen Init", InitTweak::genInit( translationUnit ) );
317	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( translationUnit ) );
318	if ( libcfap ) {
319	// generate the bodies of cfa library functions
320	LibCfa::makeLibCfa( translationUnit );
321	} // if
322
323	if ( declstatsp ) {
324	CodeTools::printDeclStats( translationUnit );
325	deleteAll( translationUnit );
326	return EXIT_SUCCESS;
327	} // if
328
329	if ( bresolvep ) {
330	dump( translationUnit );
331	return EXIT_SUCCESS;
332	} // if
333
334	CodeTools::fillLocations( translationUnit );
335
336	if ( resolvprotop ) {
337	CodeTools::dumpAsResolvProto( translationUnit );
338	return EXIT_SUCCESS;
339	} // if
340
341	PASS( "Resolve", ResolvExpr::resolve( translationUnit ) );
342	if ( exprp ) {
343	dump( translationUnit );
344	return EXIT_SUCCESS;
345	} // if
346
347	// fix ObjectDecl - replaces ConstructorInit nodes
348	PASS( "Fix Init", InitTweak::fix( translationUnit, buildingLibrary() ) );
349	if ( ctorinitp ) {
350	dump ( translationUnit );
351	return EXIT_SUCCESS;
352	} // if
353
354	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
355
356	PASS( "Translate EHM" , ControlStruct::translateEHM( translationUnit ) );
357
358	PASS( "Gen Waitfor" , Concurrency::generateWaitFor( translationUnit ) );
359
360	PASS( "Convert Specializations", GenPoly::convertSpecializations( translationUnit ) ); // needs to happen before tuple types are expanded
361
362	PASS( "Expand Tuples", Tuples::expandTuples( translationUnit ) ); // xxx - is this the right place for this?
363
364	if ( tuplep ) {
365	dump( translationUnit );
366	return EXIT_SUCCESS;
367	} // if
368
369	PASS( "Virtual Expand Casts", Virtual::expandCasts( translationUnit ) ); // Must come after translateEHM
370
371	PASS( "Instantiate Generics", GenPoly::instantiateGeneric( translationUnit ) );
372	if ( genericsp ) {
373	dump( translationUnit );
374	return EXIT_SUCCESS;
375	} // if
376
377	PASS( "Convert L-Value", GenPoly::convertLvalue( translationUnit ) );
378
379	if ( bboxp ) {
380	dump( translationUnit );
381	return EXIT_SUCCESS;
382	} // if
383	PASS( "Box", GenPoly::box( translationUnit ) );
384
385	if ( bcodegenp ) {
386	dump( translationUnit );
387	return EXIT_SUCCESS;
388	} // if
389
390	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
391	output = new ofstream( argv[ optind ] );
392	} // if
393
394	CodeTools::fillLocations( translationUnit );
395	PASS( "Code Gen", CodeGen::generate( translationUnit, *output, ! genproto, prettycodegenp, true, linemarks ) );
396
397	CodeGen::FixMain::fix( *output, (PreludeDirector + "/bootloader.c").c_str() );
398	if ( output != &cout ) {
399	delete output;
400	} // if
401	} catch ( SemanticErrorException &e ) {
402	if ( errorp ) {
403	cerr << "---AST at error:---" << endl;
404	dump( translationUnit, cerr );
405	cerr << endl << "---End of AST, begin error message:---\n" << endl;
406	} // if
407	e.print();
408	if ( output != &cout ) {
409	delete output;
410	} // if
411	return EXIT_FAILURE;
412	} catch ( UnimplementedError &e ) {
413	cout << "Sorry, " << e.get_what() << " is not currently implemented" << endl;
414	if ( output != &cout ) {
415	delete output;
416	} // if
417	return EXIT_FAILURE;
418	} catch ( CompilerError &e ) {
419	cerr << "Compiler Error: " << e.get_what() << endl;
420	cerr << "(please report bugs to [REDACTED])" << endl;
421	if ( output != &cout ) {
422	delete output;
423	} // if
424	return EXIT_FAILURE;
425	} catch ( ... ) {
426	exception_ptr eptr = current_exception();
427	try {
428	if (eptr) {
429	rethrow_exception(eptr);
430	} else {
431	cerr << "Exception Uncaught and Unknown" << endl;
432	} // if
433	} catch(const exception& e) {
434	cerr << "Uncaught Exception \"" << e.what() << "\"\n";
435	} // try
436	return EXIT_FAILURE;
437	} // try
438
439	deleteAll( translationUnit );
440	Stats::print();
441	return EXIT_SUCCESS;
442	} // main
443
444
445	static const char optstring[] = ":c:ghlLmNnpP:S:twW:D:";
446
447	enum { PreludeDir = 128 };
448	static struct option long_opts[] = {
449	{ "colors", required_argument, nullptr, 'c' },
450	{ "gdb", no_argument, nullptr, 'g' },
451	{ "help", no_argument, nullptr, 'h' },
452	{ "libcfa", no_argument, nullptr, 'l' },
453	{ "linemarks", no_argument, nullptr, 'L' },
454	{ "no-main", no_argument, 0, 'm' },
455	{ "no-linemarks", no_argument, nullptr, 'N' },
456	{ "no-prelude", no_argument, nullptr, 'n' },
457	{ "prototypes", no_argument, nullptr, 'p' },
458	{ "print", required_argument, nullptr, 'P' },
459	{ "prelude-dir", required_argument, nullptr, PreludeDir },
460	{ "statistics", required_argument, nullptr, 'S' },
461	{ "tree", no_argument, nullptr, 't' },
462	{ "", no_argument, nullptr, 0 }, // -w
463	{ "", no_argument, nullptr, 0 }, // -W
464	{ "", no_argument, nullptr, 0 }, // -D
465	{ nullptr, 0, nullptr, 0 }
466	}; // long_opts
467
468	static const char * description[] = {
469	"diagnostic color: never, always, or auto.", // -c
470	"wait for gdb to attach", // -g
471	"print help message", // -h
472	"generate libcfa.c", // -l
473	"generate line marks", // -L
474	"do not replace main", // -m
475	"do not generate line marks", // -N
476	"do not read prelude", // -n
477	"generate prototypes for prelude functions", // -p
478	"print", // -P
479	"<directory> prelude directory for debug/nodebug", // no flag
480	"<option-list> enable profiling information:\n counters,heap,time,all,none", // -S
481	"building cfa standard lib", // -t
482	"", // -w
483	"", // -W
484	"", // -D
485	}; // description
486
487	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
488
489	static struct Printopts {
490	const char * name;
491	int & flag;
492	int val;
493	const char * descript;
494	} printopts[] = {
495	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
496	{ "asterr", errorp, true, "print AST on error" },
497	{ "declstats", declstatsp, true, "code property statistics" },
498	{ "parse", yydebug, true, "yacc (parsing) debug information" },
499	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
500	{ "rproto", resolvprotop, true, "resolver-proto instance" },
501	{ "rsteps", resolvep, true, "print resolver steps" },
502	{ "tree", parsep, true, "print parse tree" },
503	// code dumps
504	{ "ast", astp, true, "print AST after parsing" },
505	{ "symevt", symtabp, true, "print AST after symbol table events" },
506	{ "altexpr", expraltp, true, "print alternatives for expressions" },
507	{ "astdecl", validp, true, "print AST after declaration validation pass" },
508	{ "resolver", bresolvep, true, "print AST before resolver step" },
509	{ "astexpr", exprp, true, "print AST after expression analysis" },
510	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
511	{ "tuple", tuplep, true, "print AST after tuple expansion" },
512	{ "astgen", genericsp, true, "print AST after instantiate generics" },
513	{ "box", bboxp, true, "print AST before box step" },
514	{ "codegen", bcodegenp, true, "print AST before code generation" },
515	};
516	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
517
518	static void usage( char *argv[] ) {
519	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
520	int i = 0, j = 1; // j skips starting colon
521	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
522	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
523	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
524	cout << " -" << optstring[j] << ",";
525	} else { // no flag
526	j -= 1; // compensate
527	cout << " ";
528	} // if
529	cout << " --" << left << setw(12) << long_opts[i].name << " ";
530	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
531	cout << "one of: " << endl;
532	for ( int i = 0; i < printoptsSize; i += 1 ) {
533	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
534	} // for
535	} else {
536	cout << description[i] << endl;
537	} // if
538	} // if
539	if ( optstring[j + 1] == ':' ) j += 1;
540	} // for
541	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
542	exit( EXIT_FAILURE );
543	} // usage
544
545	static void parse_cmdline( int argc, char * argv[] ) {
546	opterr = 0; // (global) prevent getopt from printing error messages
547
548	bool Wsuppress = false, Werror = false;
549	int c;
550	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
551	switch ( c ) {
552	case 'c': // diagnostic colors
553	if ( strcmp( optarg, "always" ) == 0 ) {
554	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
555	} else if ( strcmp( optarg, "never" ) == 0 ) {
556	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
557	} else if ( strcmp( optarg, "auto" ) == 0 ) {
558	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
559	} // if
560	break;
561	case 'h': // help message
562	usage( argv ); // no return
563	break;
564	case 'l': // generate libcfa.c
565	libcfap = true;
566	break;
567	case 'L': // generate line marks
568	linemarks = true;
569	break;
570	case 'm': // do not replace main
571	nomainp = true;
572	break;
573	case 'N': // do not generate line marks
574	linemarks = false;
575	break;
576	case 'n': // do not read prelude
577	nopreludep = true;
578	break;
579	case 'p': // generate prototypes for prelude functions
580	genproto = true;
581	break;
582	case 'P': // print options
583	for ( int i = 0;; i += 1 ) {
584	if ( i == printoptsSize ) {
585	cout << "Unknown --print option " << optarg << endl;
586	goto Default;
587	} // if
588	if ( strcmp( optarg, printopts[i].name ) == 0 ) {
589	printopts[i].flag = printopts[i].val;
590	break;
591	} // if
592	} // for
593	break;
594	case PreludeDir: // prelude directory for debug/nodebug, hidden
595	PreludeDirector = optarg;
596	break;
597	case 'S': // enable profiling information, argument comma separated list of names
598	Stats::parse_params( optarg );
599	break;
600	case 't': // building cfa stdlib
601	treep = true;
602	break;
603	case 'g': // wait for gdb
604	waiting_for_gdb = true;
605	break;
606	case 'w': // suppress all warnings, hidden
607	Wsuppress = true;
608	break;
609	case 'W': // coordinate gcc -W with CFA, hidden
610	if ( strcmp( optarg, "all" ) == 0 ) {
611	SemanticWarning_EnableAll();
612	} else if ( strcmp( optarg, "error" ) == 0 ) {
613	Werror = true;
614	} else {
615	char * warning = optarg;
616	Severity s;
617	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
618	warning += 3;
619	s = Severity::Suppress;
620	} else {
621	s = Severity::Warn;
622	} // if
623	SemanticWarning_Set( warning, s );
624	} // if
625	break;
626	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
627	break;
628	case '?': // unknown option
629	if ( optopt ) { // short option ?
630	cout << "Unknown option -" << (char)optopt << endl;
631	} else {
632	cout << "Unknown option " << argv[optind - 1] << endl;
633	} // if
634	goto Default;
635	case ':': // missing option
636	if ( optopt ) { // short option ?
637	cout << "Missing option for -" << (char)optopt << endl;
638	} else {
639	cout << "Missing option for " << argv[optind - 1] << endl;
640	} // if
641	goto Default;
642	Default:
643	default:
644	usage( argv ); // no return
645	} // switch
646	} // while
647
648	if ( Werror ) {
649	SemanticWarning_WarningAsError();
650	} // if
651	if ( Wsuppress ) {
652	SemanticWarning_SuppressAll();
653	} // if
654	// for ( const auto w : WarningFormats ) {
655	// cout << w.name << ' ' << (int)w.severity << endl;
656	// } // for
657	} // parse_cmdline
658
659	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit ) {
660	extern int yyparse( void );
661	extern FILE * yyin;
662	extern int yylineno;
663
664	::linkage = linkage; // set globals
665	yyin = input;
666	yylineno = 1;
667	int parseStatus = yyparse();
668
669	fclose( input );
670	if ( shouldExit \|\| parseStatus != 0 ) {
671	exit( parseStatus );
672	} // if
673	} // parse
674
675	static bool notPrelude( Declaration * decl ) {
676	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
677	} // notPrelude
678
679	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
680	list< Declaration * > decls;
681
682	if ( genproto ) {
683	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
684	} else {
685	decls = translationUnit;
686	} // if
687
688	// depending on commandline options, either generate code or dump the AST
689	if ( codegenp ) {
690	CodeGen::generate( decls, out, ! genproto, prettycodegenp );
691	} else {
692	printAll( decls, out );
693	} // if
694	deleteAll( translationUnit );
695	} // dump
696
697	// Local Variables: //
698	// tab-width: 4 //
699	// mode: c++ //
700	// compile-command: "make install" //
701	// End: //

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