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source: src/main.cpp@ 5ad6f0d

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Last change on this file since 5ad6f0d was 17fa94f, checked in by Andrew Beach <ajbeach@…>, 7 months ago
Reworked some nodes so they can be typed or untyped. This allowed me to remove TranslationDeps as the type information is only needed in the candidate finder, which can easily insert it.
Property mode set to `100644`
File size: 28.3 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.cpp --
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 : Sun Jun 23 16:38:09 2024
13	// Update Count : 691
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/Pass.hpp" // for pass_visitor_stats
32	#include "AST/Print.hpp" // for printAll
33	#include "AST/TranslationUnit.hpp" // for TranslationUnit
34	#include "AST/Util.hpp" // for checkInvariants
35	#include "CompilationState.hpp"
36	#include "../config.h" // for CFA_LIBDIR
37	#include "CodeGen/FixMain.hpp" // for FixMain
38	#include "CodeGen/FixNames.hpp" // for fixNames
39	#include "CodeGen/Generate.hpp" // for generate
40	#include "CodeGen/LinkOnce.hpp" // for translateLinkOnce
41	#include "Common/CodeLocationTools.hpp" // for forceFillCodeLocations
42	#include "Common/DeclStats.hpp" // for printDeclStats
43	#include "Common/ResolvProtoDump.hpp" // for dumpAsResolverProto
44	#include "Common/Stats.hpp" // for Stats
45	#include "Common/Utility.hpp" // for deleteAll, filter, printAll
46	#include "Concurrency/Actors.hpp" // for implementActors
47	#include "Concurrency/Corun.hpp" // for implementCorun
48	#include "Concurrency/Keywords.hpp" // for implementMutex, implement...
49	#include "Concurrency/Waitfor.hpp" // for generateWaitfor
50	#include "Concurrency/Waituntil.hpp" // for generateWaitUntil
51	#include "ControlStruct/ExceptDecl.hpp" // for translateExcept
52	#include "ControlStruct/ExceptTranslate.hpp"// for translateThrows, translat...
53	#include "ControlStruct/FixLabels.hpp" // for fixLabels
54	#include "ControlStruct/HoistControlDecls.hpp" // hoistControlDecls
55	#include "ControlStruct/TranslateEnumRange.hpp" // translateEnumRange
56	#include "GenPoly/Box.hpp" // for box
57	#include "GenPoly/InstantiateGeneric.hpp" // for instantiateGeneric
58	#include "GenPoly/Lvalue.hpp" // for convertLvalue
59	#include "GenPoly/Specialize.hpp" // for convertSpecializations
60	#include "InitTweak/FixInit.hpp" // for fix
61	#include "InitTweak/GenInit.hpp" // for genInit
62	#include "MakeLibCfa.hpp" // 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.hpp" // for resolve
67	#include "Tuples/Tuples.hpp" // for expandMemberTuples, expan...
68	#include "Validate/Autogen.hpp" // for autogenerateRoutines
69	#include "Validate/CheckAssertions.hpp" // for checkAssertions
70	#include "Validate/CompoundLiteral.hpp" // for handleCompoundLiterals
71	#include "Validate/EliminateTypedef.hpp" // for eliminateTypedef
72	#include "Validate/EnumAndPointerDecay.hpp" // for decayEnumsAndPointers
73	#include "Validate/FindSpecialDecls.hpp" // for findGlobalDecls
74	#include "Validate/FixQualifiedTypes.hpp" // for fixQualifiedTypes
75	#include "Validate/FixReturnTypes.hpp" // for fixReturnTypes
76	#include "Validate/ForallPointerDecay.hpp" // for decayForallPointers
77	#include "Validate/GenericParameter.hpp" // for fillGenericParameters, tr...
78	#include "Validate/HoistStruct.hpp" // for hoistStruct
79	#include "Validate/HoistTypeDecls.hpp" // for hoistTypeDecls
80	#include "Validate/ImplementEnumFunc.hpp" // for implementEnumFunc
81	#include "Validate/InitializerLength.hpp" // for setLengthFromInitializer
82	#include "Validate/LabelAddressFixer.hpp" // for fixLabelAddresses
83	#include "Validate/LinkInstanceTypes.hpp" // for linkInstanceTypes
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.hpp" // 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 Template" );
97	auto pass = build<CounterGroup>( name, group );
98	ast::pass_visitor_stats.depth = 0;
99	ast::pass_visitor_stats.avg = build<AverageCounter<double>>( "Average Depth", pass );
100	ast::pass_visitor_stats.max = build<MaxCounter<double>>( "Max Depth", pass );
101	}
102	}
103
104	#define PASS( name, pass, unit, ... ) \
105	if ( errorp ) { cerr << name << endl; } \
106	NewPass(name); \
107	Stats::Time::StartBlock(name); \
108	pass(unit,##__VA_ARGS__); \
109	Stats::Time::StopBlock(); \
110	if ( invariant ) { \
111	ast::checkInvariants(unit); \
112	}
113
114	#define DUMP( cond, unit ) \
115	if ( cond ) { \
116	dump( std::move( unit ) ); \
117	return EXIT_SUCCESS; \
118	}
119
120	static bool waiting_for_gdb = false; // flag to set cfa-cpp to wait for gdb on start
121
122	static string PreludeDirector = "";
123
124	static void parse_cmdline( int argc, char * argv[] );
125	static void dump( ast::TranslationUnit && transUnit, ostream & out = cout );
126
127	static void backtrace( int start );
128	static void initSignals();
129
130	int main( int argc, char * argv[] ) {
131	FILE * input; // use FILE rather than istream because yyin is FILE
132	ostream * output = & cout;
133	ast::TranslationUnit transUnit;
134
135	initSignals();
136
137	// cout << "main" << endl;
138	// for ( int i = 0; i < argc; i += 1 ) {
139	// cout << '\t' << argv[i] << endl;
140	// } // for
141
142	parse_cmdline( argc, argv ); // process command-line arguments
143
144	if ( waiting_for_gdb ) {
145	cerr << "Waiting for gdb" << endl;
146	cerr << "run :" << endl;
147	cerr << " gdb attach " << getpid() << endl;
148	raise(SIGSTOP);
149	} // if
150
151	try {
152	// choose to read the program from a file or stdin
153	if ( optind < argc ) { // any commands after the flags ? => input file name
154	input = fopen( argv[ optind ], "r" );
155	assertf( input, "cannot open %s because %s\n", argv[ optind ], strerror( errno ) );
156	optind += 1;
157	} else { // no input file name
158	input = stdin;
159	} // if
160
161	Stats::Time::StartGlobal();
162	NewPass("Parse");
163	Stats::Time::StartBlock("Parse");
164
165	// read in the builtins, extras, and the prelude
166	if ( ! nopreludep ) { // include gcc builtins
167	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
168
169	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
170
171	// Read to gcc builtins, if not generating the cfa library
172	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cfa").c_str(), "r" );
173	assertf( gcc_builtins, "cannot open gcc-builtins.cfa\n" );
174	parse( gcc_builtins, ast::Linkage::Compiler );
175
176	// read the extra prelude in, if not generating the cfa library
177	FILE * extras = fopen( (PreludeDirector + "/extras.cfa").c_str(), "r" );
178	assertf( extras, "cannot open extras.cfa\n" );
179	parse( extras, ast::Linkage::BuiltinC );
180	if ( ! libcfap ) {
181	// read the prelude in, if not generating the cfa library
182	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
183	assertf( prelude, "cannot open prelude.cfa\n" );
184	parse( prelude, ast::Linkage::Intrinsic );
185
186	// Read to cfa builtins, if not generating the cfa library
187	FILE * builtins = fopen( (PreludeDirector + "/builtins.cfa").c_str(), "r" );
188	assertf( builtins, "cannot open builtins.cfa\n" );
189	parse( builtins, ast::Linkage::BuiltinCFA );
190	} // if
191	} // if
192
193	parse( input, libcfap ? ast::Linkage::Intrinsic : ast::Linkage::Cforall, yydebug );
194
195	transUnit = buildUnit();
196
197	DUMP( astp, transUnit );
198
199	Stats::Time::StopBlock();
200
201	PASS( "Hoist Type Decls", Validate::hoistTypeDecls, transUnit );
202
203	PASS( "Translate Exception Declarations", ControlStruct::translateExcept, transUnit );
204	DUMP( exdeclp, transUnit );
205	PASS( "Verify Ctor, Dtor & Assign", Validate::verifyCtorDtorAssign, transUnit );
206	PASS( "Replace Typedefs", Validate::replaceTypedef, transUnit );
207	PASS( "Fix Return Types", Validate::fixReturnTypes, transUnit );
208	PASS( "Check Assertions", Validate::checkAssertions, transUnit );
209	PASS( "Enum and Pointer Decay", Validate::decayEnumsAndPointers, transUnit );
210
211	PASS( "Link Instance Types", Validate::linkInstanceTypes, transUnit );
212
213	PASS( "Forall Pointer Decay", Validate::decayForallPointers, transUnit );
214	PASS( "Fix Qualified Types", Validate::fixQualifiedTypes, transUnit );
215	PASS( "Eliminate Typedef", Validate::eliminateTypedef, transUnit );
216	PASS( "Hoist Struct", Validate::hoistStruct, transUnit );
217	PASS( "Validate Generic Parameters", Validate::fillGenericParameters, transUnit );
218	PASS( "Translate Enum Range Expression", ControlStruct::translateEnumRange, transUnit );
219	PASS( "Translate Dimensions", Validate::translateDimensionParameters, transUnit );
220	PASS( "Generate Enum Attributes Functions", Validate::implementEnumFunc, transUnit );
221	PASS( "Check Function Returns", Validate::checkReturnStatements, transUnit );
222	PASS( "Fix Return Statements", InitTweak::fixReturnStatements, transUnit );
223	PASS( "Implement Concurrent Keywords", Concurrency::implementKeywords, transUnit );
224	PASS( "Fix Unique Ids", Validate::fixUniqueIds, transUnit );
225	PASS( "Implement Corun", Concurrency::implementCorun, transUnit );
226	PASS( "Fix Label Address", Validate::fixLabelAddresses, transUnit );
227	PASS( "Fix Labels", ControlStruct::fixLabels, transUnit );
228	PASS( "Hoist Control Declarations", ControlStruct::hoistControlDecls, transUnit );
229
230	PASS( "Generate Autogen Routines", Validate::autogenerateRoutines, transUnit );
231
232	PASS( "Implement Actors", Concurrency::implementActors, transUnit );
233	PASS( "Implement Virtual Destructors", Virtual::implementVirtDtors, transUnit );
234	PASS( "Implement Mutex", Concurrency::implementMutex, transUnit );
235	PASS( "Implement Thread Start", Concurrency::implementThreadStarter, transUnit );
236	PASS( "Compound Literal", Validate::handleCompoundLiterals, transUnit );
237	PASS( "Set Length From Initializer", Validate::setLengthFromInitializer, transUnit );
238	PASS( "Find Global Decls", Validate::findGlobalDecls, transUnit );
239
240	if ( symtabp ) {
241	return EXIT_SUCCESS;
242	} // if
243
244	if ( expraltp ) {
245	ResolvExpr::printCandidates( transUnit );
246	return EXIT_SUCCESS;
247	} // if
248
249	DUMP( validp, transUnit );
250
251	PASS( "Translate Throws", ControlStruct::translateThrows, transUnit );
252	PASS( "Implement Waituntil", Concurrency::generateWaitUntil, transUnit );
253	PASS( "Fix Names", CodeGen::fixNames, transUnit );
254	PASS( "Gen Init", InitTweak::genInit, transUnit );
255	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples, transUnit );
256
257	if ( libcfap ) {
258	// Generate the bodies of cfa library functions.
259	LibCfa::makeLibCfa( transUnit );
260	} // if
261
262	if ( declstatsp ) {
263	printDeclStats( transUnit );
264	return EXIT_SUCCESS;
265	} // if
266
267	DUMP( bresolvep, transUnit );
268
269	if ( resolvprotop ) {
270	dumpAsResolverProto( transUnit );
271	return EXIT_SUCCESS;
272	} // if
273
274	PASS( "Resolve", ResolvExpr::resolve, transUnit );
275	DUMP( exprp, transUnit );
276	PASS( "Fix Init", InitTweak::fix, transUnit, buildingLibrary() ); // Here
277	PASS( "Erase With", ResolvExpr::eraseWith, transUnit );
278
279	// fix ObjectDecl - replaces ConstructorInit nodes
280	DUMP( ctorinitp, transUnit );
281
282	// Currently not working due to unresolved issues with UniqueExpr
283	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
284
285	PASS( "Translate Tries", ControlStruct::translateTries, transUnit );
286	PASS( "Gen Waitfor", Concurrency::generateWaitFor, transUnit );
287	PASS( "Fix Main Linkage", CodeGen::fixMainLinkage, transUnit, !nomainp );
288
289	// Needs to happen before tuple types are expanded.
290	PASS( "Convert Specializations", GenPoly::convertSpecializations, transUnit );
291
292	PASS( "Expand Tuples", Tuples::expandTuples, transUnit );
293	DUMP( tuplep, transUnit );
294
295	// Must come after Translate Tries.
296	PASS( "Virtual Expand Casts", Virtual::expandCasts, transUnit );
297
298	PASS( "Instantiate Generics", GenPoly::instantiateGeneric, transUnit );
299	DUMP( genericsp, transUnit );
300
301	PASS( "Convert L-Value", GenPoly::convertLvalue, transUnit );
302	DUMP( bboxp, transUnit );
303	PASS( "Box", GenPoly::box, transUnit );
304	PASS( "Link-Once", CodeGen::translateLinkOnce, transUnit );
305
306	// Code has been lowered to C, now we can start generation.
307
308	DUMP( bcodegenp, transUnit );
309
310	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
311	output = new ofstream( argv[ optind ] );
312	} // if
313
314	PASS( "Code Gen", CodeGen::generate, transUnit, *output, !genproto, prettycodegenp, true, linemarks, false );
315	CodeGen::fixMainInvoke( transUnit, *output, (PreludeDirector + "/bootloader.c").c_str() );
316
317	if ( output != &cout ) {
318	delete output;
319	} // if
320	} catch ( SemanticErrorException & e ) {
321	if ( errorp ) {
322	cerr << "---AST at error:---" << endl;
323	dump( std::move( transUnit ), cerr );
324	cerr << endl << "---End of AST, begin error message:---\n" << endl;
325	} // if
326	e.print();
327	if ( output != &cout ) {
328	delete output;
329	} // if
330	return EXIT_FAILURE;
331	} catch ( std::bad_alloc & ) {
332	cerr << "cfa-cpp compilation error std::bad_alloc" << endl;
333	backtrace( 1 );
334	abort();
335	} catch ( ... ) {
336	exception_ptr eptr = current_exception();
337	try {
338	if (eptr) {
339	rethrow_exception(eptr);
340	} else {
341	cerr << "cfa-cpp compilation error exception uncaught and unknown" << endl;
342	} // if
343	} catch( const exception & e ) {
344	cerr << "cfa-cpp compilation error uncaught exception \"" << e.what() << "\"\n";
345	} // try
346	return EXIT_FAILURE;
347	} // try
348
349	// This pseudo-pass is used to get more accurate heap statistics.
350	NewPass("Clean-up");
351	Stats::Time::StartBlock("Clean-Up");
352	transUnit.global = ast::TranslationGlobal();
353	transUnit.decls.clear();
354	Stats::Time::StopBlock();
355
356	Stats::print();
357	return EXIT_SUCCESS;
358	} // main
359
360
361	static const char optstring[] = ":c:ghilLmNnpdP:S:twW:D:";
362
363	enum { PreludeDir = 128 };
364	static struct option long_opts[] = {
365	{ "colors", required_argument, nullptr, 'c' },
366	{ "gdb", no_argument, nullptr, 'g' },
367	{ "help", no_argument, nullptr, 'h' },
368	{ "invariant", no_argument, nullptr, 'i' },
369	{ "libcfa", no_argument, nullptr, 'l' },
370	{ "linemarks", no_argument, nullptr, 'L' },
371	{ "no-main", no_argument, nullptr, 'm' },
372	{ "no-linemarks", no_argument, nullptr, 'N' },
373	{ "no-prelude", no_argument, nullptr, 'n' },
374	{ "prototypes", no_argument, nullptr, 'p' },
375	{ "deterministic-out", no_argument, nullptr, 'd' },
376	{ "print", required_argument, nullptr, 'P' },
377	{ "prelude-dir", required_argument, nullptr, PreludeDir },
378	{ "statistics", required_argument, nullptr, 'S' },
379	{ "tree", no_argument, nullptr, 't' },
380	{ "", no_argument, nullptr, 0 }, // -w
381	{ "", no_argument, nullptr, 0 }, // -W
382	{ "", no_argument, nullptr, 0 }, // -D
383	{ nullptr, 0, nullptr, 0 }
384	}; // long_opts
385
386	static const char * description[] = {
387	"diagnostic color: never, always, auto", // -c
388	"wait for gdb to attach", // -g
389	"print translator help message", // -h
390	"invariant checking during AST passes", // -i
391	"generate libcfa.c", // -l
392	"generate line marks", // -L
393	"do not replace main", // -m
394	"do not generate line marks", // -N
395	"do not read prelude", // -n
396	"do not generate prelude prototypes => prelude not printed", // -p
397	"only print deterministic output", // -d
398	"print", // -P
399	"<directory> prelude directory for debug/nodebug", // no flag
400	"<option-list> enable profiling information: counters, heap, time, all, none", // -S
401	"building cfa standard lib", // -t
402	"", // -w
403	"", // -W
404	"", // -D
405	}; // description
406
407	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
408
409	static struct Printopts {
410	const char * name;
411	int & flag;
412	int val;
413	const char * descript;
414	} printopts[] = {
415	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
416	{ "asterr", errorp, true, "print AST on error" },
417	{ "declstats", declstatsp, true, "print code property statistics" },
418	{ "parse", yydebug, true, "print yacc (parsing) debug information" },
419	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
420	{ "rproto", resolvprotop, true, "resolver-proto instance" },
421	{ "rsteps", resolvep, true, "print resolver steps" },
422	// AST dumps
423	{ "ast", astp, true, "print AST after parsing" },
424	{ "excpdecl", exdeclp, true, "print AST after translating exception decls" },
425	{ "symevt", symtabp, true, "print AST after symbol table events" },
426	{ "expralt", expraltp, true, "print AST after expressions alternatives" },
427	{ "valdecl", validp, true, "print AST after declaration validation pass" },
428	{ "bresolver", bresolvep, true, "print AST before resolver step" },
429	{ "expranly", exprp, true, "print AST after expression analysis" },
430	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
431	{ "tuple", tuplep, true, "print AST after tuple expansion" },
432	{ "instgen", genericsp, true, "print AST after instantiate generics" },
433	{ "bbox", bboxp, true, "print AST before box pass" },
434	{ "bcodegen", bcodegenp, true, "print AST before code generation" }
435	};
436	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
437
438	static void usage( char * argv[] ) {
439	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
440	int i = 0, j = 1; // j skips starting colon
441	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
442	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
443	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
444	cout << " -" << optstring[j] << ",";
445	} else { // no flag
446	j -= 1; // compensate
447	cout << " ";
448	} // if
449	cout << " --" << left << setw(12) << long_opts[i].name << " ";
450	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
451	cout << "one of: " << endl;
452	for ( int i = 0; i < printoptsSize; i += 1 ) {
453	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
454	} // for
455	} else {
456	cout << description[i] << endl;
457	} // if
458	} // if
459	if ( optstring[j + 1] == ':' ) j += 1;
460	} // for
461	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
462	exit( EXIT_FAILURE );
463	} // usage
464
465	static void parse_cmdline( int argc, char * argv[] ) {
466	opterr = 0; // (global) prevent getopt from printing error messages
467
468	bool Wsuppress = false, Werror = false;
469	int c;
470	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
471	switch ( c ) {
472	case 'c': // diagnostic colors
473	if ( strcmp( optarg, "always" ) == 0 ) {
474	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
475	} else if ( strcmp( optarg, "never" ) == 0 ) {
476	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
477	} else if ( strcmp( optarg, "auto" ) == 0 ) {
478	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
479	} // if
480	break;
481	case 'h': // help message
482	usage( argv ); // no return
483	break;
484	case 'i': // invariant checking
485	invariant = true;
486	break;
487	case 'l': // generate libcfa.c
488	libcfap = true;
489	break;
490	case 'L': // generate line marks
491	linemarks = true;
492	break;
493	case 'm': // do not replace main
494	nomainp = true;
495	break;
496	case 'N': // do not generate line marks
497	linemarks = false;
498	break;
499	case 'n': // do not read prelude
500	nopreludep = true;
501	break;
502	case 'p': // generate prototypes for prelude functions
503	genproto = true;
504	break;
505	case 'd': // don't print non-deterministic output
506	deterministic_output = true;
507	break;
508	case 'P': // print options
509	for ( int i = 0;; i += 1 ) {
510	if ( i == printoptsSize ) {
511	cout << "Unknown --print option " << optarg << endl;
512	goto Default;
513	} // if
514	if ( strcmp( optarg, printopts[i].name ) == 0 ) {
515	printopts[i].flag = printopts[i].val;
516	break;
517	} // if
518	} // for
519	break;
520	case PreludeDir: // prelude directory for debug/nodebug, hidden
521	PreludeDirector = optarg;
522	break;
523	case 'S': // enable profiling information, argument comma separated list of names
524	Stats::parse_params( optarg );
525	break;
526	case 't': // building cfa stdlib
527	treep = true;
528	break;
529	case 'g': // wait for gdb
530	waiting_for_gdb = true;
531	break;
532	case 'w': // suppress all warnings, hidden
533	Wsuppress = true;
534	break;
535	case 'W': // coordinate gcc -W with CFA, hidden
536	if ( strcmp( optarg, "all" ) == 0 ) {
537	SemanticWarning_EnableAll();
538	} else if ( strcmp( optarg, "error" ) == 0 ) {
539	Werror = true;
540	} else {
541	char * warning = optarg;
542	Severity s;
543	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
544	warning += 3;
545	s = Severity::Suppress;
546	} else {
547	s = Severity::Warn;
548	} // if
549	SemanticWarning_Set( warning, s );
550	} // if
551	break;
552	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
553	break;
554	case '?': // unknown option
555	if ( optopt ) { // short option ?
556	cout << "Unknown option -" << (char)optopt << endl;
557	} else {
558	cout << "Unknown option " << argv[optind - 1] << endl;
559	} // if
560	goto Default;
561	case ':': // missing option
562	if ( optopt ) { // short option ?
563	cout << "Missing option for -" << (char)optopt << endl;
564	} else {
565	cout << "Missing option for " << argv[optind - 1] << endl;
566	} // if
567	goto Default;
568	Default:
569	default:
570	usage( argv ); // no return
571	} // switch
572	} // while
573
574	if ( Werror ) {
575	SemanticWarning_WarningAsError();
576	} // if
577	if ( Wsuppress ) {
578	SemanticWarning_SuppressAll();
579	} // if
580	// for ( const auto w : WarningFormats ) {
581	// cout << w.name << ' ' << (int)w.severity << endl;
582	// } // for
583	} // parse_cmdline
584
585	static bool notPrelude( ast::ptr<ast::Decl> & decl ) {
586	return !decl->linkage.is_builtin;
587	}
588
589	static void dump( ast::TranslationUnit && unit, std::ostream & out ) {
590	// May filter out all prelude declarations.
591	if ( genproto ) {
592	std::list<ast::ptr<ast::Decl>> decls;
593	std::copy_if( unit.decls.begin(), unit.decls.end(),
594	std::back_inserter( decls ), notPrelude );
595	decls.swap( unit.decls );
596	}
597
598	// May print as full dump or as code generation.
599	if ( codegenp ) {
600	CodeGen::generate( unit, out, !genproto, prettycodegenp, false, false, false );
601	} else {
602	ast::printAll( out, unit.decls );
603	}
604	}
605
606	static void backtrace( int start ) { // skip first N stack frames
607	enum { Frames = 50, }; // maximum number of stack frames
608	void * array[Frames];
609	size_t size = ::backtrace( array, Frames );
610	char ** messages = ::backtrace_symbols( array, size ); // does not demangle names
611
612	*index( messages[0], '(' ) = '\0'; // find executable name
613	cerr << "Stack back trace for: " << messages[0] << endl;
614
615	// skip last 2 stack frames after main
616	for ( unsigned int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
617	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
618
619	for ( char * p = messages[i]; *p; p += 1 ) { // find parantheses and +offset
620	if ( *p == '(' ) {
621	mangled_name = p;
622	} else if ( *p == '+' ) {
623	offset_begin = p;
624	} else if ( *p == ')' ) {
625	offset_end = p;
626	break;
627	} // if
628	} // for
629
630	// if line contains symbol, attempt to demangle
631	int frameNo = i - start;
632	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
633	*mangled_name++ = '\0'; // delimit strings
634	*offset_begin++ = '\0';
635	*offset_end++ = '\0';
636
637	int status;
638	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
639	// bug in __cxa_demangle for single-character lower-case non-mangled names
640	if ( status == 0 ) { // demangling successful ?
641	cerr << "(" << frameNo << ") " << messages[i] << " : "
642	<< real_name << "+" << offset_begin << offset_end << endl;
643	} else { // otherwise, output mangled name
644	cerr << "(" << frameNo << ") " << messages[i] << " : "
645	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
646	} // if
647
648	free( real_name );
649	} else { // otherwise, print the whole line
650	cerr << "(" << frameNo << ") " << messages[i] << endl;
651	} // if
652	} // for
653
654	free( messages );
655	} // backtrace
656
657	#define SIGPARMS int sig __attribute__(( unused )), siginfo_t * sfp __attribute__(( unused )), ucontext_t * cxt __attribute__(( unused ))
658
659	static void _Signal(struct sigaction & act, int sig, int flags ) {
660	sigemptyset( &act.sa_mask );
661	act.sa_flags = flags;
662
663	if ( sigaction( sig, &act, nullptr ) == -1 ) {
664	cerr << "cfa-cpp compilation error problem installing signal handler, error(" << errno << ") " << strerror( errno ) << endl;
665	_exit( EXIT_FAILURE );
666	} // if
667	}
668
669	static void Signal( int sig, void (* handler)(SIGPARMS), int flags ) {
670	struct sigaction act;
671	act.sa_sigaction = (void ()(int, siginfo_t , void *))handler;
672	_Signal(act, sig, flags);
673	} // Signal
674
675	static void Signal( int sig, void (* handler)(int), int flags ) {
676	struct sigaction act;
677	act.sa_handler = handler;
678	_Signal(act, sig, flags);
679	} // Signal
680
681	static void sigSegvBusHandler( SIGPARMS ) {
682	if ( sfp->si_addr == nullptr ) {
683	cerr << "Null pointer (nullptr) dereference." << endl;
684	} else {
685	cerr << (sig == SIGSEGV ? "Segment fault" : "Bus error") << " at memory location " << sfp->si_addr << "." << endl
686	<< "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;
687	} // if
688	backtrace( 2 ); // skip first 2 stack frames
689	abort(); // cause core dump for debugging
690	} // sigSegvBusHandler
691
692	static void sigFpeHandler( SIGPARMS ) {
693	const char * msg;
694
695	switch ( sfp->si_code ) {
696	case FPE_INTDIV: case FPE_FLTDIV: msg = "divide by zero"; break;
697	case FPE_FLTOVF: msg = "overflow"; break;
698	case FPE_FLTUND: msg = "underflow"; break;
699	case FPE_FLTRES: msg = "inexact result"; break;
700	case FPE_FLTINV: msg = "invalid operation"; break;
701	default: msg = "unknown";
702	} // choose
703	cerr << "Computation error " << msg << " at location " << sfp->si_addr << endl
704	<< "Possible cause is constant-expression evaluation invalid." << endl;
705	backtrace( 2 ); // skip first 2 stack frames
706	abort(); // cause core dump for debugging
707	} // sigFpeHandler
708
709	static void sigAbortHandler( SIGPARMS ) {
710	backtrace( 6 ); // skip first 6 stack frames
711	Signal( SIGABRT, SIG_DFL, SA_SIGINFO ); // reset default signal handler
712	raise( SIGABRT ); // reraise SIGABRT
713	} // sigAbortHandler
714
715	static void initSignals() {
716	Signal( SIGSEGV, sigSegvBusHandler, SA_SIGINFO );
717	Signal( SIGBUS, sigSegvBusHandler, SA_SIGINFO );
718	Signal( SIGFPE, sigFpeHandler, SA_SIGINFO );
719	Signal( SIGABRT, sigAbortHandler, SA_SIGINFO );
720	}
721
722	// Local Variables: //
723	// tab-width: 4 //
724	// mode: c++ //
725	// compile-command: "make install" //
726	// End: //

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