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source: src/main.cc @ 8941b6b

Last change on this file since 8941b6b was 8941b6b, checked in by Andrew Beach <ajbeach@…>, 8 months ago
Direct translation of code generation.
Property mode set to `100644`
File size: 29.0 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 : Thu Sep 28 22:28:45 2023
13	// Update Count : 687
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	#include "AST/Convert.hpp"
32	#include "AST/Pass.hpp" // for pass_visitor_stats
33	#include "AST/TranslationUnit.hpp" // for TranslationUnit
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/Corun.hpp" // for implementCorun
49	#include "Concurrency/Keywords.h" // for implementMutex, implement...
50	#include "Concurrency/Waitfor.h" // for generateWaitfor
51	#include "Concurrency/Waituntil.hpp" // for generateWaitUntil
52	#include "ControlStruct/ExceptDecl.h" // for translateExcept
53	#include "ControlStruct/ExceptTranslate.h" // for translateThrows, translat...
54	#include "ControlStruct/FixLabels.hpp" // for fixLabels
55	#include "ControlStruct/HoistControlDecls.hpp" // hoistControlDecls
56	#include "GenPoly/Box.h" // for box
57	#include "GenPoly/InstantiateGeneric.h" // for instantiateGeneric
58	#include "GenPoly/Lvalue.h" // for convertLvalue
59	#include "GenPoly/Specialize.h" // for convertSpecializations
60	#include "InitTweak/FixInit.h" // for fix
61	#include "InitTweak/GenInit.h" // for genInit
62	#include "MakeLibCfa.h" // for makeLibCfa
63	#include "Parser/RunParser.hpp" // for buildList, dumpParseTree,...
64	#include "ResolvExpr/CandidatePrinter.hpp" // for printCandidates
65	#include "ResolvExpr/EraseWith.hpp" // for eraseWith
66	#include "ResolvExpr/Resolver.h" // for resolve
67	#include "SynTree/LinkageSpec.h" // for Spec, Cforall, Intrinsic
68	#include "SynTree/Declaration.h" // for Declaration
69	#include "Tuples/Tuples.h" // for expandMemberTuples, expan...
70	#include "Validate/Autogen.hpp" // for autogenerateRoutines
71	#include "Validate/CompoundLiteral.hpp" // for handleCompoundLiterals
72	#include "Validate/EliminateTypedef.hpp" // for eliminateTypedef
73	#include "Validate/EnumAndPointerDecay.hpp" // for decayEnumsAndPointers
74	#include "Validate/FindSpecialDecls.h" // for findGlobalDecls
75	#include "Validate/FixQualifiedTypes.hpp" // for fixQualifiedTypes
76	#include "Validate/FixReturnTypes.hpp" // for fixReturnTypes
77	#include "Validate/ForallPointerDecay.hpp" // for decayForallPointers
78	#include "Validate/GenericParameter.hpp" // for fillGenericParameters, tr...
79	#include "Validate/HoistStruct.hpp" // for hoistStruct
80	#include "Validate/HoistTypeDecls.hpp" // for hoistTypeDecls
81	#include "Validate/InitializerLength.hpp" // for setLengthFromInitializer
82	#include "Validate/LabelAddressFixer.hpp" // for fixLabelAddresses
83	#include "Validate/LinkReferenceToTypes.hpp" // for linkReferenceToTypes
84	#include "Validate/ReplaceTypedef.hpp" // for replaceTypedef
85	#include "Validate/ReturnCheck.hpp" // for checkReturnStatements
86	#include "Validate/VerifyCtorDtorAssign.hpp" // for verifyCtorDtorAssign
87	#include "Virtual/ExpandCasts.h" // for expandCasts
88	#include "Virtual/VirtualDtor.hpp" // for implementVirtDtors
89
90	using namespace std;
91
92	static void NewPass( const char * const name ) {
93	Stats::Heap::newPass( name );
94	using namespace Stats::Counters;
95	{
96	static auto group = build<CounterGroup>( "Pass Visitor" );
97	auto pass = build<CounterGroup>( name, group );
98	pass_visitor_stats.depth = 0;
99	pass_visitor_stats.avg = build<AverageCounter<double>>( "Average Depth", pass );
100	pass_visitor_stats.max = build<MaxCounter<double>>( "Max Depth", pass );
101	}
102	{
103	static auto group = build<CounterGroup>( "Syntax Node" );
104	auto pass = build<CounterGroup>( name, group );
105	BaseSyntaxNode::new_nodes = build<SimpleCounter>( "Allocs", pass );
106	}
107	}
108
109	// Helpers for checkInvariant:
110	void checkInvariants( std::list< Declaration * > & ) {}
111	using ast::checkInvariants;
112
113	#define PASS( name, pass, unit, ... ) \
114	if ( errorp ) { cerr << name << endl; } \
115	NewPass(name); \
116	Stats::Time::StartBlock(name); \
117	pass(unit,##__VA_ARGS__); \
118	Stats::Time::StopBlock(); \
119	if ( invariant ) { \
120	checkInvariants(unit); \
121	}
122
123	#define DUMP( cond, unit ) \
124	if ( cond ) { \
125	dump(unit); \
126	return EXIT_SUCCESS; \
127	}
128
129	static bool waiting_for_gdb = false; // flag to set cfa-cpp to wait for gdb on start
130
131	static string PreludeDirector = "";
132
133	static void parse_cmdline( int argc, char * argv[] );
134	static void dump( list< Declaration * > & translationUnit, ostream & out = cout );
135	static void dump( ast::TranslationUnit && transUnit, ostream & out = cout );
136
137	static void backtrace( int start ) { // skip first N stack frames
138	enum { Frames = 50, }; // maximum number of stack frames
139	void * array[Frames];
140	size_t size = ::backtrace( array, Frames );
141	char ** messages = ::backtrace_symbols( array, size ); // does not demangle names
142
143	*index( messages[0], '(' ) = '\0'; // find executable name
144	cerr << "Stack back trace for: " << messages[0] << endl;
145
146	// skip last 2 stack frames after main
147	for ( unsigned int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
148	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
149
150	for ( char * p = messages[i]; *p; p += 1 ) { // find parantheses and +offset
151	if ( *p == '(' ) {
152	mangled_name = p;
153	} else if ( *p == '+' ) {
154	offset_begin = p;
155	} else if ( *p == ')' ) {
156	offset_end = p;
157	break;
158	} // if
159	} // for
160
161	// if line contains symbol, attempt to demangle
162	int frameNo = i - start;
163	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
164	*mangled_name++ = '\0'; // delimit strings
165	*offset_begin++ = '\0';
166	*offset_end++ = '\0';
167
168	int status;
169	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
170	// bug in __cxa_demangle for single-character lower-case non-mangled names
171	if ( status == 0 ) { // demangling successful ?
172	cerr << "(" << frameNo << ") " << messages[i] << " : "
173	<< real_name << "+" << offset_begin << offset_end << endl;
174	} else { // otherwise, output mangled name
175	cerr << "(" << frameNo << ") " << messages[i] << " : "
176	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
177	} // if
178
179	free( real_name );
180	} else { // otherwise, print the whole line
181	cerr << "(" << frameNo << ") " << messages[i] << endl;
182	} // if
183	} // for
184
185	free( messages );
186	} // backtrace
187
188	#define SIGPARMS int sig __attribute__(( unused )), siginfo_t * sfp __attribute__(( unused )), ucontext_t * cxt __attribute__(( unused ))
189
190	static void _Signal(struct sigaction & act, int sig, int flags ) {
191	act.sa_flags = flags;
192
193	if ( sigaction( sig, &act, nullptr ) == -1 ) {
194	cerr << "cfa-cpp compilation error problem installing signal handler, error(" << errno << ") " << strerror( errno ) << endl;
195	_exit( EXIT_FAILURE );
196	} // if
197	}
198
199	static void Signal( int sig, void (* handler)(SIGPARMS), int flags ) {
200	struct sigaction act;
201	act.sa_sigaction = (void ()(int, siginfo_t , void *))handler;
202	_Signal(act, sig, flags);
203	} // Signal
204
205	static void Signal( int sig, void (* handler)(int), int flags ) {
206	struct sigaction act;
207	act.sa_handler = handler;
208	_Signal(act, sig, flags);
209	} // Signal
210
211	static void sigSegvBusHandler( SIGPARMS ) {
212	if ( sfp->si_addr == nullptr ) {
213	cerr << "Null pointer (nullptr) dereference." << endl;
214	} else {
215	cerr << (sig == SIGSEGV ? "Segment fault" : "Bus error") << " at memory location " << sfp->si_addr << "." << endl
216	<< "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;
217	} // if
218	backtrace( 2 ); // skip first 2 stack frames
219	abort(); // cause core dump for debugging
220	} // sigSegvBusHandler
221
222	static void sigFpeHandler( SIGPARMS ) {
223	const char * msg;
224
225	switch ( sfp->si_code ) {
226	case FPE_INTDIV: case FPE_FLTDIV: msg = "divide by zero"; break;
227	case FPE_FLTOVF: msg = "overflow"; break;
228	case FPE_FLTUND: msg = "underflow"; break;
229	case FPE_FLTRES: msg = "inexact result"; break;
230	case FPE_FLTINV: msg = "invalid operation"; break;
231	default: msg = "unknown";
232	} // choose
233	cerr << "Computation error " << msg << " at location " << sfp->si_addr << endl
234	<< "Possible cause is constant-expression evaluation invalid." << endl;
235	backtrace( 2 ); // skip first 2 stack frames
236	abort(); // cause core dump for debugging
237	} // sigFpeHandler
238
239	static void sigAbortHandler( SIGPARMS ) {
240	backtrace( 6 ); // skip first 6 stack frames
241	Signal( SIGABRT, SIG_DFL, SA_SIGINFO ); // reset default signal handler
242	raise( SIGABRT ); // reraise SIGABRT
243	} // sigAbortHandler
244
245	int main( int argc, char * argv[] ) {
246	FILE * input; // use FILE rather than istream because yyin is FILE
247	ostream * output = & cout;
248	list< Declaration * > translationUnit;
249	ast::TranslationUnit transUnit;
250
251	Signal( SIGSEGV, sigSegvBusHandler, SA_SIGINFO );
252	Signal( SIGBUS, sigSegvBusHandler, SA_SIGINFO );
253	Signal( SIGFPE, sigFpeHandler, SA_SIGINFO );
254	Signal( SIGABRT, sigAbortHandler, SA_SIGINFO );
255
256	// cout << "main" << endl;
257	// for ( int i = 0; i < argc; i += 1 ) {
258	// cout << '\t' << argv[i] << endl;
259	// } // for
260
261	parse_cmdline( argc, argv ); // process command-line arguments
262	CodeGen::FixMain::setReplaceMain( !nomainp );
263
264	if ( waiting_for_gdb ) {
265	cerr << "Waiting for gdb" << endl;
266	cerr << "run :" << endl;
267	cerr << " gdb attach " << getpid() << endl;
268	raise(SIGSTOP);
269	} // if
270
271	try {
272	// choose to read the program from a file or stdin
273	if ( optind < argc ) { // any commands after the flags ? => input file name
274	input = fopen( argv[ optind ], "r" );
275	assertf( input, "cannot open %s because %s\n", argv[ optind ], strerror( errno ) );
276	optind += 1;
277	} else { // no input file name
278	input = stdin;
279	} // if
280
281	Stats::Time::StartGlobal();
282	NewPass("Parse");
283	Stats::Time::StartBlock("Parse");
284
285	// read in the builtins, extras, and the prelude
286	if ( ! nopreludep ) { // include gcc builtins
287	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
288
289	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
290
291	// Read to gcc builtins, if not generating the cfa library
292	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cf").c_str(), "r" );
293	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
294	parse( gcc_builtins, ast::Linkage::Compiler );
295
296	// read the extra prelude in, if not generating the cfa library
297	FILE * extras = fopen( (PreludeDirector + "/extras.cf").c_str(), "r" );
298	assertf( extras, "cannot open extras.cf\n" );
299	parse( extras, ast::Linkage::BuiltinC );
300
301	if ( ! libcfap ) {
302	// read the prelude in, if not generating the cfa library
303	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
304	assertf( prelude, "cannot open prelude.cfa\n" );
305	parse( prelude, ast::Linkage::Intrinsic );
306
307	// Read to cfa builtins, if not generating the cfa library
308	FILE * builtins = fopen( (PreludeDirector + "/builtins.cf").c_str(), "r" );
309	assertf( builtins, "cannot open builtins.cf\n" );
310	parse( builtins, ast::Linkage::BuiltinCFA );
311	} // if
312	} // if
313
314	parse( input, libcfap ? ast::Linkage::Intrinsic : ast::Linkage::Cforall, yydebug );
315
316	transUnit = buildUnit();
317
318	DUMP( astp, std::move( transUnit ) );
319
320	Stats::Time::StopBlock();
321
322	if (Stats::Counters::enabled) {
323	ast::pass_visitor_stats.avg = Stats::Counters::build<Stats::Counters::AverageCounter<double>>("Average Depth - New");
324	ast::pass_visitor_stats.max = Stats::Counters::build<Stats::Counters::MaxCounter<double>>("Max depth - New");
325	}
326
327	PASS( "Hoist Type Decls", Validate::hoistTypeDecls, transUnit );
328
329	PASS( "Translate Exception Declarations", ControlStruct::translateExcept, transUnit );
330	DUMP( exdeclp, std::move( transUnit ) );
331	PASS( "Verify Ctor, Dtor & Assign", Validate::verifyCtorDtorAssign, transUnit );
332	PASS( "Replace Typedefs", Validate::replaceTypedef, transUnit );
333	PASS( "Fix Return Types", Validate::fixReturnTypes, transUnit );
334	PASS( "Enum and Pointer Decay", Validate::decayEnumsAndPointers, transUnit );
335
336	PASS( "Link Reference To Types", Validate::linkReferenceToTypes, transUnit );
337
338	PASS( "Forall Pointer Decay", Validate::decayForallPointers, transUnit );
339	PASS( "Fix Qualified Types", Validate::fixQualifiedTypes, transUnit );
340	PASS( "Eliminate Typedef", Validate::eliminateTypedef, transUnit );
341	PASS( "Hoist Struct", Validate::hoistStruct, transUnit );
342	PASS( "Validate Generic Parameters", Validate::fillGenericParameters, transUnit );
343	PASS( "Translate Dimensions", Validate::translateDimensionParameters, transUnit );
344	PASS( "Check Function Returns", Validate::checkReturnStatements, transUnit );
345	PASS( "Fix Return Statements", InitTweak::fixReturnStatements, transUnit );
346	PASS( "Implement Concurrent Keywords", Concurrency::implementKeywords, transUnit );
347	PASS( "Fix Unique Ids", Validate::fixUniqueIds, transUnit );
348	PASS( "Implement Corun", Concurrency::implementCorun, transUnit );
349	PASS( "Hoist Control Declarations", ControlStruct::hoistControlDecls, transUnit );
350
351	PASS( "Generate Autogen Routines", Validate::autogenerateRoutines, transUnit );
352
353	PASS( "Implement Actors", Concurrency::implementActors, transUnit );
354	PASS( "Implement Virtual Destructors", Virtual::implementVirtDtors, transUnit );
355	PASS( "Implement Mutex", Concurrency::implementMutex, transUnit );
356	PASS( "Implement Thread Start", Concurrency::implementThreadStarter, transUnit );
357	PASS( "Compound Literal", Validate::handleCompoundLiterals, transUnit );
358	PASS( "Set Length From Initializer", Validate::setLengthFromInitializer, transUnit );
359	PASS( "Find Global Decls", Validate::findGlobalDecls, transUnit );
360	PASS( "Fix Label Address", Validate::fixLabelAddresses, transUnit );
361
362	if ( symtabp ) {
363	return EXIT_SUCCESS;
364	} // if
365
366	if ( expraltp ) {
367	ResolvExpr::printCandidates( transUnit );
368	return EXIT_SUCCESS;
369	} // if
370
371	DUMP( validp, std::move( transUnit ) );
372
373	PASS( "Translate Throws", ControlStruct::translateThrows, transUnit );
374	PASS( "Fix Labels", ControlStruct::fixLabels, transUnit );
375	PASS( "Implement Waituntil", Concurrency::generateWaitUntil, transUnit );
376	PASS( "Fix Names", CodeGen::fixNames, transUnit );
377	PASS( "Gen Init", InitTweak::genInit, transUnit );
378	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples, transUnit );
379
380	if ( libcfap ) {
381	// Generate the bodies of cfa library functions.
382	LibCfa::makeLibCfa( transUnit );
383	} // if
384
385	if ( declstatsp ) {
386	printDeclStats( transUnit );
387	return EXIT_SUCCESS;
388	} // if
389
390	DUMP( bresolvep, std::move( transUnit ) );
391
392	if ( resolvprotop ) {
393	dumpAsResolverProto( transUnit );
394	return EXIT_SUCCESS;
395	} // if
396
397	PASS( "Resolve", ResolvExpr::resolve, transUnit );
398	DUMP( exprp, std::move( transUnit ) );
399
400	PASS( "Fix Init", InitTweak::fix, transUnit, buildingLibrary() );
401	PASS( "Erase With", ResolvExpr::eraseWith, transUnit );
402
403	// fix ObjectDecl - replaces ConstructorInit nodes
404	DUMP( ctorinitp, std::move( transUnit ) );
405
406	// Currently not working due to unresolved issues with UniqueExpr
407	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
408
409	PASS( "Translate Tries", ControlStruct::translateTries, transUnit );
410	PASS( "Gen Waitfor", Concurrency::generateWaitFor, transUnit );
411
412	// Needs to happen before tuple types are expanded.
413	PASS( "Convert Specializations", GenPoly::convertSpecializations, transUnit );
414
415	PASS( "Expand Tuples", Tuples::expandTuples, transUnit );
416	DUMP( tuplep, std::move( transUnit ) );
417
418	// Must come after Translate Tries.
419	PASS( "Virtual Expand Casts", Virtual::expandCasts, transUnit );
420
421	PASS( "Instantiate Generics", GenPoly::instantiateGeneric, transUnit );
422	DUMP( genericsp, std::move( transUnit ) );
423
424	PASS( "Convert L-Value", GenPoly::convertLvalue, transUnit );
425	DUMP( bboxp, std::move( transUnit ) );
426	PASS( "Box", GenPoly::box, transUnit );
427	PASS( "Link-Once", CodeGen::translateLinkOnce, transUnit );
428
429	// Code has been lowered to C, now we can start generation.
430
431	DUMP( bcodegenp, std::move( transUnit ) );
432
433	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
434	output = new ofstream( argv[ optind ] );
435	} // if
436
437	PASS( "Code Gen", CodeGen::generate, transUnit, *output, !genproto, prettycodegenp, true, linemarks, false );
438
439	translationUnit = convert( std::move( transUnit ) );
440
441	CodeGen::FixMain::fix( translationUnit, *output,
442	(PreludeDirector + "/bootloader.c").c_str() );
443	if ( output != &cout ) {
444	delete output;
445	} // if
446	} catch ( SemanticErrorException & e ) {
447	if ( errorp ) {
448	cerr << "---AST at error:---" << endl;
449	// We check which section the errors came from without looking at
450	// transUnit because std::move means it could look like anything.
451	if ( !translationUnit.empty() ) {
452	dump( translationUnit, cerr );
453	} else {
454	dump( std::move( transUnit ), cerr );
455	}
456	cerr << endl << "---End of AST, begin error message:---\n" << endl;
457	} // if
458	e.print();
459	if ( output != &cout ) {
460	delete output;
461	} // if
462	return EXIT_FAILURE;
463	} catch ( std::bad_alloc & ) {
464	cerr << "cfa-cpp compilation error std::bad_alloc" << endl;
465	backtrace( 1 );
466	abort();
467	} catch ( ... ) {
468	exception_ptr eptr = current_exception();
469	try {
470	if (eptr) {
471	rethrow_exception(eptr);
472	} else {
473	cerr << "cfa-cpp compilation error exception uncaught and unknown" << endl;
474	} // if
475	} catch( const exception & e ) {
476	cerr << "cfa-cpp compilation error uncaught exception \"" << e.what() << "\"\n";
477	} // try
478	return EXIT_FAILURE;
479	} // try
480
481	deleteAll( translationUnit );
482	Stats::print();
483	return EXIT_SUCCESS;
484	} // main
485
486
487	static const char optstring[] = ":c:ghilLmNnpdP:S:twW:D:";
488
489	enum { PreludeDir = 128 };
490	static struct option long_opts[] = {
491	{ "colors", required_argument, nullptr, 'c' },
492	{ "gdb", no_argument, nullptr, 'g' },
493	{ "help", no_argument, nullptr, 'h' },
494	{ "invariant", no_argument, nullptr, 'i' },
495	{ "libcfa", no_argument, nullptr, 'l' },
496	{ "linemarks", no_argument, nullptr, 'L' },
497	{ "no-main", no_argument, nullptr, 'm' },
498	{ "no-linemarks", no_argument, nullptr, 'N' },
499	{ "no-prelude", no_argument, nullptr, 'n' },
500	{ "prototypes", no_argument, nullptr, 'p' },
501	{ "deterministic-out", no_argument, nullptr, 'd' },
502	{ "print", required_argument, nullptr, 'P' },
503	{ "prelude-dir", required_argument, nullptr, PreludeDir },
504	{ "statistics", required_argument, nullptr, 'S' },
505	{ "tree", no_argument, nullptr, 't' },
506	{ "", no_argument, nullptr, 0 }, // -w
507	{ "", no_argument, nullptr, 0 }, // -W
508	{ "", no_argument, nullptr, 0 }, // -D
509	{ nullptr, 0, nullptr, 0 }
510	}; // long_opts
511
512	static const char * description[] = {
513	"diagnostic color: never, always, auto", // -c
514	"wait for gdb to attach", // -g
515	"print translator help message", // -h
516	"invariant checking during AST passes", // -i
517	"generate libcfa.c", // -l
518	"generate line marks", // -L
519	"do not replace main", // -m
520	"do not generate line marks", // -N
521	"do not read prelude", // -n
522	"do not generate prelude prototypes => prelude not printed", // -p
523	"only print deterministic output", // -d
524	"print", // -P
525	"<directory> prelude directory for debug/nodebug", // no flag
526	"<option-list> enable profiling information: counters, heap, time, all, none", // -S
527	"building cfa standard lib", // -t
528	"", // -w
529	"", // -W
530	"", // -D
531	}; // description
532
533	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
534
535	static struct Printopts {
536	const char * name;
537	int & flag;
538	int val;
539	const char * descript;
540	} printopts[] = {
541	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
542	{ "asterr", errorp, true, "print AST on error" },
543	{ "declstats", declstatsp, true, "print code property statistics" },
544	{ "parse", yydebug, true, "print yacc (parsing) debug information" },
545	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
546	{ "rproto", resolvprotop, true, "resolver-proto instance" },
547	{ "rsteps", resolvep, true, "print resolver steps" },
548	// AST dumps
549	{ "ast", astp, true, "print AST after parsing" },
550	{ "excpdecl", exdeclp, true, "print AST after translating exception decls" },
551	{ "symevt", symtabp, true, "print AST after symbol table events" },
552	{ "expralt", expraltp, true, "print AST after expressions alternatives" },
553	{ "valdecl", validp, true, "print AST after declaration validation pass" },
554	{ "bresolver", bresolvep, true, "print AST before resolver step" },
555	{ "expranly", exprp, true, "print AST after expression analysis" },
556	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
557	{ "tuple", tuplep, true, "print AST after tuple expansion" },
558	{ "instgen", genericsp, true, "print AST after instantiate generics" },
559	{ "bbox", bboxp, true, "print AST before box pass" },
560	{ "bcodegen", bcodegenp, true, "print AST before code generation" },
561	};
562	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
563
564	static void usage( char * argv[] ) {
565	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
566	int i = 0, j = 1; // j skips starting colon
567	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
568	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
569	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
570	cout << " -" << optstring[j] << ",";
571	} else { // no flag
572	j -= 1; // compensate
573	cout << " ";
574	} // if
575	cout << " --" << left << setw(12) << long_opts[i].name << " ";
576	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
577	cout << "one of: " << endl;
578	for ( int i = 0; i < printoptsSize; i += 1 ) {
579	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
580	} // for
581	} else {
582	cout << description[i] << endl;
583	} // if
584	} // if
585	if ( optstring[j + 1] == ':' ) j += 1;
586	} // for
587	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
588	exit( EXIT_FAILURE );
589	} // usage
590
591	static void parse_cmdline( int argc, char * argv[] ) {
592	opterr = 0; // (global) prevent getopt from printing error messages
593
594	bool Wsuppress = false, Werror = false;
595	int c;
596	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
597	switch ( c ) {
598	case 'c': // diagnostic colors
599	if ( strcmp( optarg, "always" ) == 0 ) {
600	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
601	} else if ( strcmp( optarg, "never" ) == 0 ) {
602	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
603	} else if ( strcmp( optarg, "auto" ) == 0 ) {
604	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
605	} // if
606	break;
607	case 'h': // help message
608	usage( argv ); // no return
609	break;
610	case 'i': // invariant checking
611	invariant = true;
612	break;
613	case 'l': // generate libcfa.c
614	libcfap = true;
615	break;
616	case 'L': // generate line marks
617	linemarks = true;
618	break;
619	case 'm': // do not replace main
620	nomainp = true;
621	break;
622	case 'N': // do not generate line marks
623	linemarks = false;
624	break;
625	case 'n': // do not read prelude
626	nopreludep = true;
627	break;
628	case 'p': // generate prototypes for prelude functions
629	genproto = true;
630	break;
631	case 'd': // don't print non-deterministic output
632	deterministic_output = true;
633	break;
634	case 'P': // print options
635	for ( int i = 0;; i += 1 ) {
636	if ( i == printoptsSize ) {
637	cout << "Unknown --print option " << optarg << endl;
638	goto Default;
639	} // if
640	if ( strcmp( optarg, printopts[i].name ) == 0 ) {
641	printopts[i].flag = printopts[i].val;
642	break;
643	} // if
644	} // for
645	break;
646	case PreludeDir: // prelude directory for debug/nodebug, hidden
647	PreludeDirector = optarg;
648	break;
649	case 'S': // enable profiling information, argument comma separated list of names
650	Stats::parse_params( optarg );
651	break;
652	case 't': // building cfa stdlib
653	treep = true;
654	break;
655	case 'g': // wait for gdb
656	waiting_for_gdb = true;
657	break;
658	case 'w': // suppress all warnings, hidden
659	Wsuppress = true;
660	break;
661	case 'W': // coordinate gcc -W with CFA, hidden
662	if ( strcmp( optarg, "all" ) == 0 ) {
663	SemanticWarning_EnableAll();
664	} else if ( strcmp( optarg, "error" ) == 0 ) {
665	Werror = true;
666	} else {
667	char * warning = optarg;
668	Severity s;
669	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
670	warning += 3;
671	s = Severity::Suppress;
672	} else {
673	s = Severity::Warn;
674	} // if
675	SemanticWarning_Set( warning, s );
676	} // if
677	break;
678	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
679	break;
680	case '?': // unknown option
681	if ( optopt ) { // short option ?
682	cout << "Unknown option -" << (char)optopt << endl;
683	} else {
684	cout << "Unknown option " << argv[optind - 1] << endl;
685	} // if
686	goto Default;
687	case ':': // missing option
688	if ( optopt ) { // short option ?
689	cout << "Missing option for -" << (char)optopt << endl;
690	} else {
691	cout << "Missing option for " << argv[optind - 1] << endl;
692	} // if
693	goto Default;
694	Default:
695	default:
696	usage( argv ); // no return
697	} // switch
698	} // while
699
700	if ( Werror ) {
701	SemanticWarning_WarningAsError();
702	} // if
703	if ( Wsuppress ) {
704	SemanticWarning_SuppressAll();
705	} // if
706	// for ( const auto w : WarningFormats ) {
707	// cout << w.name << ' ' << (int)w.severity << endl;
708	// } // for
709	} // parse_cmdline
710
711	static bool notPrelude( Declaration * decl ) {
712	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
713	} // notPrelude
714
715	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
716	list< Declaration * > decls;
717
718	if ( genproto ) {
719	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
720	} else {
721	decls = translationUnit;
722	} // if
723
724	// depending on commandline options, either generate code or dump the AST
725	if ( codegenp ) {
726	CodeGen::generate( decls, out, ! genproto, prettycodegenp );
727	} else {
728	printAll( decls, out );
729	} // if
730	deleteAll( translationUnit );
731	} // dump
732
733	static void dump( ast::TranslationUnit && transUnit, ostream & out ) {
734	std::list< Declaration * > translationUnit = convert( std::move( transUnit ) );
735	dump( translationUnit, out );
736	}
737
738	// Local Variables: //
739	// tab-width: 4 //
740	// mode: c++ //
741	// compile-command: "make install" //
742	// End: //

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