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source: src/main.cc @ 0e6cadf

ast-experimental

Last change on this file since 0e6cadf was 6e1e2d0, checked in by caparsons <caparson@…>, 14 months ago
resolved merge conflicts
Property mode set to `100644`
File size: 28.6 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 : Mon Apr 10 21:12:17 2023
13	// Update Count : 682
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 "AST/Util.hpp" // for checkInvariants
35	#include "CompilationState.h"
36	#include "../config.h" // for CFA_LIBDIR
37	#include "CodeGen/FixMain.h" // for FixMain
38	#include "CodeGen/FixNames.h" // for fixNames
39	#include "CodeGen/Generate.h" // for generate
40	#include "CodeGen/LinkOnce.h" // for translateLinkOnce
41	#include "CodeTools/TrackLoc.h" // for fillLocations
42	#include "Common/CodeLocationTools.hpp" // for forceFillCodeLocations
43	#include "Common/DeclStats.hpp" // for printDeclStats
44	#include "Common/ResolvProtoDump.hpp" // for dumpAsResolverProto
45	#include "Common/Stats.h" // for Stats
46	#include "Common/utility.h" // for deleteAll, filter, printAll
47	#include "Concurrency/Actors.hpp" // for implementActors
48	#include "Concurrency/Keywords.h" // for implementMutex, implement...
49	#include "Concurrency/Waitfor.h" // for generateWaitfor
50	#include "Concurrency/Waituntil.hpp" // for generateWaitUntil
51	#include "ControlStruct/ExceptDecl.h" // for translateExcept
52	#include "ControlStruct/ExceptTranslate.h" // for translateThrows, translat...
53	#include "ControlStruct/FixLabels.hpp" // for fixLabels
54	#include "ControlStruct/HoistControlDecls.hpp" // hoistControlDecls
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/RunParser.hpp" // for buildList, dumpParseTree,...
63	#include "ResolvExpr/CandidatePrinter.hpp" // for printCandidates
64	#include "ResolvExpr/Resolver.h" // for resolve
65	#include "SynTree/LinkageSpec.h" // for Spec, Cforall, Intrinsic
66	#include "SynTree/Declaration.h" // for Declaration
67	#include "Tuples/Tuples.h" // for expandMemberTuples, expan...
68	#include "Validate/Autogen.hpp" // for autogenerateRoutines
69	#include "Validate/CompoundLiteral.hpp" // for handleCompoundLiterals
70	#include "Validate/EliminateTypedef.hpp" // for eliminateTypedef
71	#include "Validate/EnumAndPointerDecay.hpp" // for decayEnumsAndPointers
72	#include "Validate/FindSpecialDecls.h" // for findGlobalDecls
73	#include "Validate/FixQualifiedTypes.hpp" // for fixQualifiedTypes
74	#include "Validate/FixReturnTypes.hpp" // for fixReturnTypes
75	#include "Validate/ForallPointerDecay.hpp" // for decayForallPointers
76	#include "Validate/GenericParameter.hpp" // for fillGenericParameters, tr...
77	#include "Validate/HoistStruct.hpp" // for hoistStruct
78	#include "Validate/HoistTypeDecls.hpp" // for hoistTypeDecls
79	#include "Validate/InitializerLength.hpp" // for setLengthFromInitializer
80	#include "Validate/LabelAddressFixer.hpp" // for fixLabelAddresses
81	#include "Validate/LinkReferenceToTypes.hpp" // for linkReferenceToTypes
82	#include "Validate/ReplaceTypedef.hpp" // for replaceTypedef
83	#include "Validate/ReturnCheck.hpp" // for checkReturnStatements
84	#include "Validate/VerifyCtorDtorAssign.hpp" // for verifyCtorDtorAssign
85	#include "Virtual/ExpandCasts.h" // for expandCasts
86	#include "Virtual/VirtualDtor.hpp" // for implementVirtDtors
87
88	static void NewPass( const char * const name ) {
89	Stats::Heap::newPass( name );
90	using namespace Stats::Counters;
91	{
92	static auto group = build<CounterGroup>( "Pass Visitor" );
93	auto pass = build<CounterGroup>( name, group );
94	pass_visitor_stats.depth = 0;
95	pass_visitor_stats.avg = build<AverageCounter<double>>( "Average Depth", pass );
96	pass_visitor_stats.max = build<MaxCounter<double>>( "Max Depth", pass );
97	}
98	{
99	static auto group = build<CounterGroup>( "Syntax Node" );
100	auto pass = build<CounterGroup>( name, group );
101	BaseSyntaxNode::new_nodes = build<SimpleCounter>( "Allocs", pass );
102	}
103	}
104
105	// Helpers for checkInvariant:
106	void checkInvariants( std::list< Declaration * > & ) {}
107	using ast::checkInvariants;
108
109	#define PASS( name, pass, unit, ... ) \
110	if ( errorp ) { cerr << name << endl; } \
111	NewPass(name); \
112	Stats::Time::StartBlock(name); \
113	pass(unit,##__VA_ARGS__); \
114	Stats::Time::StopBlock(); \
115	if ( invariant ) { \
116	checkInvariants(unit); \
117	}
118
119	#define DUMP( cond, unit ) \
120	if ( cond ) { \
121	dump(unit); \
122	return EXIT_SUCCESS; \
123	}
124
125	static bool waiting_for_gdb = false; // flag to set cfa-cpp to wait for gdb on start
126
127	static string PreludeDirector = "";
128
129	static void parse_cmdline( int argc, char * argv[] );
130	static void dump( list< Declaration * > & translationUnit, ostream & out = cout );
131	static void dump( ast::TranslationUnit && transUnit, ostream & out = cout );
132
133	static void backtrace( int start ) { // skip first N stack frames
134	enum { Frames = 50, }; // maximum number of stack frames
135	void * array[Frames];
136	size_t size = ::backtrace( array, Frames );
137	char ** messages = ::backtrace_symbols( array, size ); // does not demangle names
138
139	*index( messages[0], '(' ) = '\0'; // find executable name
140	cerr << "Stack back trace for: " << messages[0] << endl;
141
142	// skip last 2 stack frames after main
143	for ( unsigned int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
144	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
145
146	for ( char * p = messages[i]; *p; p += 1 ) { // find parantheses and +offset
147	if ( *p == '(' ) {
148	mangled_name = p;
149	} else if ( *p == '+' ) {
150	offset_begin = p;
151	} else if ( *p == ')' ) {
152	offset_end = p;
153	break;
154	} // if
155	} // for
156
157	// if line contains symbol, attempt to demangle
158	int frameNo = i - start;
159	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
160	*mangled_name++ = '\0'; // delimit strings
161	*offset_begin++ = '\0';
162	*offset_end++ = '\0';
163
164	int status;
165	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
166	// bug in __cxa_demangle for single-character lower-case non-mangled names
167	if ( status == 0 ) { // demangling successful ?
168	cerr << "(" << frameNo << ") " << messages[i] << " : "
169	<< real_name << "+" << offset_begin << offset_end << endl;
170	} else { // otherwise, output mangled name
171	cerr << "(" << frameNo << ") " << messages[i] << " : "
172	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
173	} // if
174
175	free( real_name );
176	} else { // otherwise, print the whole line
177	cerr << "(" << frameNo << ") " << messages[i] << endl;
178	} // if
179	} // for
180
181	free( messages );
182	} // backtrace
183
184	#define SIGPARMS int sig __attribute__(( unused )), siginfo_t * sfp __attribute__(( unused )), ucontext_t * cxt __attribute__(( unused ))
185
186	static void _Signal(struct sigaction & act, int sig, int flags ) {
187	act.sa_flags = flags;
188
189	if ( sigaction( sig, &act, nullptr ) == -1 ) {
190	cerr << "cfa-cpp compilation error problem installing signal handler, error(" << errno << ") " << strerror( errno ) << endl;
191	_exit( EXIT_FAILURE );
192	} // if
193	}
194
195	static void Signal( int sig, void (* handler)(SIGPARMS), int flags ) {
196	struct sigaction act;
197	act.sa_sigaction = (void ()(int, siginfo_t , void *))handler;
198	_Signal(act, sig, flags);
199	} // Signal
200
201	static void Signal( int sig, void (* handler)(int), int flags ) {
202	struct sigaction act;
203	act.sa_handler = handler;
204	_Signal(act, sig, flags);
205	} // Signal
206
207	static void sigSegvBusHandler( SIGPARMS ) {
208	if ( sfp->si_addr == nullptr ) {
209	cerr << "Null pointer (nullptr) dereference." << endl;
210	} else {
211	cerr << (sig == SIGSEGV ? "Segment fault" : "Bus error") << " at memory location " << sfp->si_addr << "." << endl
212	<< "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;
213	} // if
214	backtrace( 2 ); // skip first 2 stack frames
215	abort(); // cause core dump for debugging
216	} // sigSegvBusHandler
217
218	static void sigFpeHandler( SIGPARMS ) {
219	const char * msg;
220
221	switch ( sfp->si_code ) {
222	case FPE_INTDIV: case FPE_FLTDIV: msg = "divide by zero"; break;
223	case FPE_FLTOVF: msg = "overflow"; break;
224	case FPE_FLTUND: msg = "underflow"; break;
225	case FPE_FLTRES: msg = "inexact result"; break;
226	case FPE_FLTINV: msg = "invalid operation"; break;
227	default: msg = "unknown";
228	} // choose
229	cerr << "Computation error " << msg << " at location " << sfp->si_addr << endl
230	<< "Possible cause is constant-expression evaluation invalid." << endl;
231	backtrace( 2 ); // skip first 2 stack frames
232	abort(); // cause core dump for debugging
233	} // sigFpeHandler
234
235	static void sigAbortHandler( SIGPARMS ) {
236	backtrace( 6 ); // skip first 6 stack frames
237	Signal( SIGABRT, SIG_DFL, SA_SIGINFO ); // reset default signal handler
238	raise( SIGABRT ); // reraise SIGABRT
239	} // sigAbortHandler
240
241	int main( int argc, char * argv[] ) {
242	FILE * input; // use FILE rather than istream because yyin is FILE
243	ostream * output = & cout;
244	list< Declaration * > translationUnit;
245	ast::TranslationUnit transUnit;
246
247	Signal( SIGSEGV, sigSegvBusHandler, SA_SIGINFO );
248	Signal( SIGBUS, sigSegvBusHandler, SA_SIGINFO );
249	Signal( SIGFPE, sigFpeHandler, SA_SIGINFO );
250	Signal( SIGABRT, sigAbortHandler, SA_SIGINFO );
251
252	// cout << "main" << endl;
253	// for ( int i = 0; i < argc; i += 1 ) {
254	// cout << '\t' << argv[i] << endl;
255	// } // for
256
257	parse_cmdline( argc, argv ); // process command-line arguments
258	CodeGen::FixMain::setReplaceMain( !nomainp );
259
260	if ( waiting_for_gdb ) {
261	cerr << "Waiting for gdb" << endl;
262	cerr << "run :" << endl;
263	cerr << " gdb attach " << getpid() << endl;
264	raise(SIGSTOP);
265	} // if
266
267	try {
268	// choose to read the program from a file or stdin
269	if ( optind < argc ) { // any commands after the flags ? => input file name
270	input = fopen( argv[ optind ], "r" );
271	assertf( input, "cannot open %s because %s\n", argv[ optind ], strerror( errno ) );
272	optind += 1;
273	} else { // no input file name
274	input = stdin;
275	} // if
276
277	Stats::Time::StartGlobal();
278	NewPass("Parse");
279	Stats::Time::StartBlock("Parse");
280
281	// read in the builtins, extras, and the prelude
282	if ( ! nopreludep ) { // include gcc builtins
283	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
284
285	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
286
287	// Read to gcc builtins, if not generating the cfa library
288	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cf").c_str(), "r" );
289	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
290	parse( gcc_builtins, ast::Linkage::Compiler );
291
292	// read the extra prelude in, if not generating the cfa library
293	FILE * extras = fopen( (PreludeDirector + "/extras.cf").c_str(), "r" );
294	assertf( extras, "cannot open extras.cf\n" );
295	parse( extras, ast::Linkage::BuiltinC );
296
297	if ( ! libcfap ) {
298	// read the prelude in, if not generating the cfa library
299	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
300	assertf( prelude, "cannot open prelude.cfa\n" );
301	parse( prelude, ast::Linkage::Intrinsic );
302
303	// Read to cfa builtins, if not generating the cfa library
304	FILE * builtins = fopen( (PreludeDirector + "/builtins.cf").c_str(), "r" );
305	assertf( builtins, "cannot open builtins.cf\n" );
306	parse( builtins, ast::Linkage::BuiltinCFA );
307	} // if
308	} // if
309
310	parse( input, libcfap ? ast::Linkage::Intrinsic : ast::Linkage::Cforall, yydebug );
311
312	transUnit = buildUnit();
313
314	DUMP( astp, std::move( transUnit ) );
315
316	Stats::Time::StopBlock();
317
318	if (Stats::Counters::enabled) {
319	ast::pass_visitor_stats.avg = Stats::Counters::build<Stats::Counters::AverageCounter<double>>("Average Depth - New");
320	ast::pass_visitor_stats.max = Stats::Counters::build<Stats::Counters::MaxCounter<double>>("Max depth - New");
321	}
322
323	PASS( "Hoist Type Decls", Validate::hoistTypeDecls, transUnit );
324
325	PASS( "Translate Exception Declarations", ControlStruct::translateExcept, transUnit );
326	DUMP( exdeclp, std::move( transUnit ) );
327	PASS( "Verify Ctor, Dtor & Assign", Validate::verifyCtorDtorAssign, transUnit );
328	PASS( "Replace Typedefs", Validate::replaceTypedef, transUnit );
329	PASS( "Fix Return Types", Validate::fixReturnTypes, transUnit );
330	PASS( "Enum and Pointer Decay", Validate::decayEnumsAndPointers, transUnit );
331
332	PASS( "Link Reference To Types", Validate::linkReferenceToTypes, transUnit );
333
334	PASS( "Fix Qualified Types", Validate::fixQualifiedTypes, transUnit );
335	PASS( "Hoist Struct", Validate::hoistStruct, transUnit );
336	PASS( "Eliminate Typedef", Validate::eliminateTypedef, transUnit );
337	PASS( "Validate Generic Parameters", Validate::fillGenericParameters, transUnit );
338	PASS( "Translate Dimensions", Validate::translateDimensionParameters, transUnit );
339	PASS( "Check Function Returns", Validate::checkReturnStatements, transUnit );
340	PASS( "Fix Return Statements", InitTweak::fixReturnStatements, transUnit );
341	PASS( "Implement Concurrent Keywords", Concurrency::implementKeywords, transUnit );
342	PASS( "Forall Pointer Decay", Validate::decayForallPointers, transUnit );
343	PASS( "Implement Waituntil", Concurrency::generateWaitUntil, transUnit );
344	PASS( "Hoist Control Declarations", ControlStruct::hoistControlDecls, transUnit );
345
346	PASS( "Generate Autogen Routines", Validate::autogenerateRoutines, transUnit );
347
348	PASS( "Implement Actors", Concurrency::implementActors, transUnit );
349	PASS( "Implement Virtual Destructors", Virtual::implementVirtDtors, transUnit );
350	PASS( "Implement Mutex", Concurrency::implementMutex, transUnit );
351	PASS( "Implement Thread Start", Concurrency::implementThreadStarter, transUnit );
352	PASS( "Compound Literal", Validate::handleCompoundLiterals, transUnit );
353	PASS( "Set Length From Initializer", Validate::setLengthFromInitializer, transUnit );
354	PASS( "Find Global Decls", Validate::findGlobalDecls, transUnit );
355	PASS( "Fix Label Address", Validate::fixLabelAddresses, transUnit );
356
357	if ( symtabp ) {
358	return EXIT_SUCCESS;
359	} // if
360
361	if ( expraltp ) {
362	ResolvExpr::printCandidates( transUnit );
363	return EXIT_SUCCESS;
364	} // if
365
366	DUMP( validp, std::move( transUnit ) );
367
368	PASS( "Translate Throws", ControlStruct::translateThrows, transUnit );
369	PASS( "Fix Labels", ControlStruct::fixLabels, transUnit );
370	PASS( "Fix Names", CodeGen::fixNames, transUnit );
371	PASS( "Gen Init", InitTweak::genInit, transUnit );
372	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples, transUnit );
373
374	if ( libcfap ) {
375	// Generate the bodies of cfa library functions.
376	LibCfa::makeLibCfa( transUnit );
377	} // if
378
379	if ( declstatsp ) {
380	printDeclStats( transUnit );
381	return EXIT_SUCCESS;
382	} // if
383
384	DUMP( bresolvep, std::move( transUnit ) );
385
386	if ( resolvprotop ) {
387	dumpAsResolverProto( transUnit );
388	return EXIT_SUCCESS;
389	} // if
390
391	PASS( "Resolve", ResolvExpr::resolve, transUnit );
392	DUMP( exprp, std::move( transUnit ) );
393
394	PASS( "Fix Init", InitTweak::fix, transUnit, buildingLibrary() );
395
396	// fix ObjectDecl - replaces ConstructorInit nodes
397	DUMP( ctorinitp, std::move( transUnit ) );
398
399	// Currently not working due to unresolved issues with UniqueExpr
400	PASS( "Expand Unique Expr", Tuples::expandUniqueExpr, transUnit ); // 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
401
402	PASS( "Translate Tries", ControlStruct::translateTries, transUnit );
403	PASS( "Gen Waitfor", Concurrency::generateWaitFor, transUnit );
404
405	// Needs to happen before tuple types are expanded.
406	PASS( "Convert Specializations", GenPoly::convertSpecializations, transUnit );
407
408	PASS( "Expand Tuples", Tuples::expandTuples, transUnit );
409	DUMP( tuplep, std::move( transUnit ) );
410
411	// Must come after Translate Tries.
412	PASS( "Virtual Expand Casts", Virtual::expandCasts, transUnit );
413
414	PASS( "Instantiate Generics", GenPoly::instantiateGeneric, transUnit );
415	DUMP( genericsp, std::move( transUnit ) );
416
417	PASS( "Convert L-Value", GenPoly::convertLvalue, transUnit );
418
419	translationUnit = convert( std::move( transUnit ) );
420
421	DUMP( bboxp, translationUnit );
422	PASS( "Box", GenPoly::box, translationUnit );
423
424	PASS( "Link-Once", CodeGen::translateLinkOnce, translationUnit );
425
426	// Code has been lowered to C, now we can start generation.
427
428	DUMP( bcodegenp, translationUnit );
429
430	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
431	output = new ofstream( argv[ optind ] );
432	} // if
433
434	CodeTools::fillLocations( translationUnit );
435	PASS( "Code Gen", CodeGen::generate, translationUnit, *output, ! genproto, prettycodegenp, true, linemarks );
436
437	CodeGen::FixMain::fix( translationUnit, *output,
438	(PreludeDirector + "/bootloader.c").c_str() );
439	if ( output != &cout ) {
440	delete output;
441	} // if
442	} catch ( SemanticErrorException & e ) {
443	if ( errorp ) {
444	cerr << "---AST at error:---" << endl;
445	// We check which section the errors came from without looking at
446	// transUnit because std::move means it could look like anything.
447	if ( !translationUnit.empty() ) {
448	dump( translationUnit, cerr );
449	} else {
450	dump( std::move( transUnit ), cerr );
451	}
452	cerr << endl << "---End of AST, begin error message:---\n" << endl;
453	} // if
454	e.print();
455	if ( output != &cout ) {
456	delete output;
457	} // if
458	return EXIT_FAILURE;
459	} catch ( std::bad_alloc & ) {
460	cerr << "cfa-cpp compilation error std::bad_alloc" << endl;
461	backtrace( 1 );
462	abort();
463	} catch ( ... ) {
464	exception_ptr eptr = current_exception();
465	try {
466	if (eptr) {
467	rethrow_exception(eptr);
468	} else {
469	cerr << "cfa-cpp compilation error exception uncaught and unknown" << endl;
470	} // if
471	} catch( const exception & e ) {
472	cerr << "cfa-cpp compilation error uncaught exception \"" << e.what() << "\"\n";
473	} // try
474	return EXIT_FAILURE;
475	} // try
476
477	deleteAll( translationUnit );
478	Stats::print();
479	return EXIT_SUCCESS;
480	} // main
481
482
483	static const char optstring[] = ":c:ghilLmNnpdP:S:twW:D:";
484
485	enum { PreludeDir = 128 };
486	static struct option long_opts[] = {
487	{ "colors", required_argument, nullptr, 'c' },
488	{ "gdb", no_argument, nullptr, 'g' },
489	{ "help", no_argument, nullptr, 'h' },
490	{ "invariant", no_argument, nullptr, 'i' },
491	{ "libcfa", no_argument, nullptr, 'l' },
492	{ "linemarks", no_argument, nullptr, 'L' },
493	{ "no-main", no_argument, nullptr, 'm' },
494	{ "no-linemarks", no_argument, nullptr, 'N' },
495	{ "no-prelude", no_argument, nullptr, 'n' },
496	{ "prototypes", no_argument, nullptr, 'p' },
497	{ "deterministic-out", no_argument, nullptr, 'd' },
498	{ "print", required_argument, nullptr, 'P' },
499	{ "prelude-dir", required_argument, nullptr, PreludeDir },
500	{ "statistics", required_argument, nullptr, 'S' },
501	{ "tree", no_argument, nullptr, 't' },
502	{ "", no_argument, nullptr, 0 }, // -w
503	{ "", no_argument, nullptr, 0 }, // -W
504	{ "", no_argument, nullptr, 0 }, // -D
505	{ nullptr, 0, nullptr, 0 }
506	}; // long_opts
507
508	static const char * description[] = {
509	"diagnostic color: never, always, auto", // -c
510	"wait for gdb to attach", // -g
511	"print translator help message", // -h
512	"invariant checking during AST passes", // -i
513	"generate libcfa.c", // -l
514	"generate line marks", // -L
515	"do not replace main", // -m
516	"do not generate line marks", // -N
517	"do not read prelude", // -n
518	"do not generate prelude prototypes => prelude not printed", // -p
519	"only print deterministic output", // -d
520	"print", // -P
521	"<directory> prelude directory for debug/nodebug", // no flag
522	"<option-list> enable profiling information: counters, heap, time, all, none", // -S
523	"building cfa standard lib", // -t
524	"", // -w
525	"", // -W
526	"", // -D
527	}; // description
528
529	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
530
531	static struct Printopts {
532	const char * name;
533	int & flag;
534	int val;
535	const char * descript;
536	} printopts[] = {
537	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
538	{ "asterr", errorp, true, "print AST on error" },
539	{ "declstats", declstatsp, true, "code property statistics" },
540	{ "parse", yydebug, true, "yacc (parsing) debug information" },
541	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
542	{ "rproto", resolvprotop, true, "resolver-proto instance" },
543	{ "rsteps", resolvep, true, "print resolver steps" },
544	// code dumps
545	{ "ast", astp, true, "print AST after parsing" },
546	{ "exdecl", exdeclp, true, "print AST after translating exception decls" },
547	{ "symevt", symtabp, true, "print AST after symbol table events" },
548	{ "altexpr", expraltp, true, "print alternatives for expressions" },
549	{ "astdecl", validp, true, "print AST after declaration validation pass" },
550	{ "resolver", bresolvep, true, "print AST before resolver step" },
551	{ "astexpr", exprp, true, "print AST after expression analysis" },
552	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
553	{ "tuple", tuplep, true, "print AST after tuple expansion" },
554	{ "astgen", genericsp, true, "print AST after instantiate generics" },
555	{ "box", bboxp, true, "print AST before box step" },
556	{ "codegen", bcodegenp, true, "print AST before code generation" },
557	};
558	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
559
560	static void usage( char * argv[] ) {
561	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
562	int i = 0, j = 1; // j skips starting colon
563	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
564	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
565	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
566	cout << " -" << optstring[j] << ",";
567	} else { // no flag
568	j -= 1; // compensate
569	cout << " ";
570	} // if
571	cout << " --" << left << setw(12) << long_opts[i].name << " ";
572	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
573	cout << "one of: " << endl;
574	for ( int i = 0; i < printoptsSize; i += 1 ) {
575	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
576	} // for
577	} else {
578	cout << description[i] << endl;
579	} // if
580	} // if
581	if ( optstring[j + 1] == ':' ) j += 1;
582	} // for
583	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
584	exit( EXIT_FAILURE );
585	} // usage
586
587	static void parse_cmdline( int argc, char * argv[] ) {
588	opterr = 0; // (global) prevent getopt from printing error messages
589
590	bool Wsuppress = false, Werror = false;
591	int c;
592	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
593	switch ( c ) {
594	case 'c': // diagnostic colors
595	if ( strcmp( optarg, "always" ) == 0 ) {
596	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
597	} else if ( strcmp( optarg, "never" ) == 0 ) {
598	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
599	} else if ( strcmp( optarg, "auto" ) == 0 ) {
600	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
601	} // if
602	break;
603	case 'h': // help message
604	usage( argv ); // no return
605	break;
606	case 'i': // invariant checking
607	invariant = true;
608	break;
609	case 'l': // generate libcfa.c
610	libcfap = true;
611	break;
612	case 'L': // generate line marks
613	linemarks = true;
614	break;
615	case 'm': // do not replace main
616	nomainp = true;
617	break;
618	case 'N': // do not generate line marks
619	linemarks = false;
620	break;
621	case 'n': // do not read prelude
622	nopreludep = true;
623	break;
624	case 'p': // generate prototypes for prelude functions
625	genproto = true;
626	break;
627	case 'd': // don't print non-deterministic output
628	deterministic_output = true;
629	break;
630	case 'P': // print options
631	for ( int i = 0;; i += 1 ) {
632	if ( i == printoptsSize ) {
633	cout << "Unknown --print option " << optarg << endl;
634	goto Default;
635	} // if
636	if ( strcmp( optarg, printopts[i].name ) == 0 ) {
637	printopts[i].flag = printopts[i].val;
638	break;
639	} // if
640	} // for
641	break;
642	case PreludeDir: // prelude directory for debug/nodebug, hidden
643	PreludeDirector = optarg;
644	break;
645	case 'S': // enable profiling information, argument comma separated list of names
646	Stats::parse_params( optarg );
647	break;
648	case 't': // building cfa stdlib
649	treep = true;
650	break;
651	case 'g': // wait for gdb
652	waiting_for_gdb = true;
653	break;
654	case 'w': // suppress all warnings, hidden
655	Wsuppress = true;
656	break;
657	case 'W': // coordinate gcc -W with CFA, hidden
658	if ( strcmp( optarg, "all" ) == 0 ) {
659	SemanticWarning_EnableAll();
660	} else if ( strcmp( optarg, "error" ) == 0 ) {
661	Werror = true;
662	} else {
663	char * warning = optarg;
664	Severity s;
665	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
666	warning += 3;
667	s = Severity::Suppress;
668	} else {
669	s = Severity::Warn;
670	} // if
671	SemanticWarning_Set( warning, s );
672	} // if
673	break;
674	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
675	break;
676	case '?': // unknown option
677	if ( optopt ) { // short option ?
678	cout << "Unknown option -" << (char)optopt << endl;
679	} else {
680	cout << "Unknown option " << argv[optind - 1] << endl;
681	} // if
682	goto Default;
683	case ':': // missing option
684	if ( optopt ) { // short option ?
685	cout << "Missing option for -" << (char)optopt << endl;
686	} else {
687	cout << "Missing option for " << argv[optind - 1] << endl;
688	} // if
689	goto Default;
690	Default:
691	default:
692	usage( argv ); // no return
693	} // switch
694	} // while
695
696	if ( Werror ) {
697	SemanticWarning_WarningAsError();
698	} // if
699	if ( Wsuppress ) {
700	SemanticWarning_SuppressAll();
701	} // if
702	// for ( const auto w : WarningFormats ) {
703	// cout << w.name << ' ' << (int)w.severity << endl;
704	// } // for
705	} // parse_cmdline
706
707	static bool notPrelude( Declaration * decl ) {
708	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
709	} // notPrelude
710
711	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
712	list< Declaration * > decls;
713
714	if ( genproto ) {
715	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
716	} else {
717	decls = translationUnit;
718	} // if
719
720	// depending on commandline options, either generate code or dump the AST
721	if ( codegenp ) {
722	CodeGen::generate( decls, out, ! genproto, prettycodegenp );
723	} else {
724	printAll( decls, out );
725	} // if
726	deleteAll( translationUnit );
727	} // dump
728
729	static void dump( ast::TranslationUnit && transUnit, ostream & out ) {
730	std::list< Declaration * > translationUnit = convert( std::move( transUnit ) );
731	dump( translationUnit, out );
732	}
733
734	// Local Variables: //
735	// tab-width: 4 //
736	// mode: c++ //
737	// compile-command: "make install" //
738	// End: //

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