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source: src/main.cc @ c3e44e6a

ADTaaron-thesisarm-ehast-experimentalcleanup-dtorsdeferred_resndemanglerenumforall-pointer-decayjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprno_listpersistent-indexerpthread-emulationqualifiedEnum

Last change on this file since c3e44e6a was af84a35, checked in by Peter A. Buhr <pabuhr@…>, 7 years ago
abort after backtrace when cfa-cpp segment faults
Property mode set to `100644`
File size: 19.8 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 : Richard C. Bilson
10	// Created On : Fri May 15 23:12:02 2015
11	// Last Modified By : Peter A. Buhr
12	// Last Modified On : Wed Jun 6 15:51:47 2018
13	// Update Count : 498
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 <signal.h> // for signal, SIGABRT, SIGSEGV
20	#include <cassert> // for assertf
21	#include <cstdio> // for fopen, FILE, fclose, stdin
22	#include <cstdlib> // for exit, free, abort, EXIT_F...
23	#include <cstring> // for index
24	#include <fstream> // for ofstream
25	#include <iostream> // for operator<<, basic_ostream
26	#include <iterator> // for back_inserter
27	#include <list> // for list
28	#include <string> // for char_traits, operator<<
29
30	#include "../config.h" // for CFA_LIBDIR
31	#include "CodeGen/FixMain.h" // for FixMain
32	#include "CodeGen/FixNames.h" // for fixNames
33	#include "CodeGen/Generate.h" // for generate
34	#include "CodeTools/DeclStats.h" // for printDeclStats
35	#include "CodeTools/TrackLoc.h" // for fillLocations
36	#include "Common/CompilerError.h" // for CompilerError
37	#include "Common/Heap.h"
38	#include "Common/PassVisitor.h"
39	#include "Common/SemanticError.h" // for SemanticError
40	#include "Common/UnimplementedError.h" // for UnimplementedError
41	#include "Common/utility.h" // for deleteAll, filter, printAll
42	#include "Concurrency/Waitfor.h" // for generateWaitfor
43	#include "ControlStruct/ExceptTranslate.h" // for translateEHM
44	#include "ControlStruct/Mutate.h" // for mutate
45	#include "GenPoly/Box.h" // for box
46	#include "GenPoly/InstantiateGeneric.h" // for instantiateGeneric
47	#include "GenPoly/Lvalue.h" // for convertLvalue
48	#include "GenPoly/Specialize.h" // for convertSpecializations
49	#include "InitTweak/FixInit.h" // for fix
50	#include "InitTweak/GenInit.h" // for genInit
51	#include "MakeLibCfa.h" // for makeLibCfa
52	#include "Parser/LinkageSpec.h" // for Spec, Cforall, Intrinsic
53	#include "Parser/ParseNode.h" // for DeclarationNode, buildList
54	#include "Parser/TypedefTable.h" // for TypedefTable
55	#include "ResolvExpr/AlternativePrinter.h" // for AlternativePrinter
56	#include "ResolvExpr/Resolver.h" // for resolve
57	#include "SymTab/Validate.h" // for validate
58	#include "SynTree/Declaration.h" // for Declaration
59	#include "SynTree/Visitor.h" // for acceptAll
60	#include "Tuples/Tuples.h" // for expandMemberTuples, expan...
61	#include "Virtual/ExpandCasts.h" // for expandCasts
62
63	using namespace std;
64
65	#define PASS(name, pass) \
66	if ( errorp ) { cerr << name << endl; } \
67	HeapStats::newPass(name); \
68	pass;
69
70	LinkageSpec::Spec linkage = LinkageSpec::Cforall;
71	TypedefTable typedefTable;
72	DeclarationNode * parseTree = nullptr; // program parse tree
73
74	extern int yydebug; // set for -g flag (Grammar)
75	bool
76	astp = false,
77	bresolvep = false,
78	bboxp = false,
79	bcodegenp = false,
80	ctorinitp = false,
81	declstatsp = false,
82	exprp = false,
83	expraltp = false,
84	genericsp = false,
85	libcfap = false,
86	nopreludep = false,
87	noprotop = false,
88	nomainp = false,
89	parsep = false,
90	resolvep = false, // used in AlternativeFinder
91	symtabp = false,
92	treep = false,
93	tuplep = false,
94	validp = false,
95	errorp = false,
96	codegenp = false,
97	prettycodegenp = false,
98	linemarks = false;
99
100	static void parse_cmdline( int argc, char argv[], const char & filename );
101	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit = false );
102	static void dump( list< Declaration * > & translationUnit, ostream & out = cout );
103
104	static void backtrace( int start ) { // skip first N stack frames
105	enum { Frames = 50 };
106	void * array[Frames];
107	int size = ::backtrace( array, Frames );
108	char ** messages = ::backtrace_symbols( array, size ); // does not demangle names
109
110	*index( messages[0], '(' ) = '\0'; // find executable name
111	cerr << "Stack back trace for: " << messages[0] << endl;
112
113	// skip last 2 stack frames after main
114	for ( int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
115	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
116	for ( char p = messages[i]; p; ++p ) { // find parantheses and +offset
117	if ( *p == '(' ) {
118	mangled_name = p;
119	} else if ( *p == '+' ) {
120	offset_begin = p;
121	} else if ( *p == ')' ) {
122	offset_end = p;
123	break;
124	} // if
125	} // for
126
127	// if line contains symbol, attempt to demangle
128	int frameNo = i - start;
129	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
130	*mangled_name++ = '\0'; // delimit strings
131	*offset_begin++ = '\0';
132	*offset_end++ = '\0';
133
134	int status;
135	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
136	// bug in __cxa_demangle for single-character lower-case non-mangled names
137	if ( status == 0 ) { // demangling successful ?
138	cerr << "(" << frameNo << ") " << messages[i] << " : "
139	<< real_name << "+" << offset_begin << offset_end << endl;
140	} else { // otherwise, output mangled name
141	cerr << "(" << frameNo << ") " << messages[i] << " : "
142	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
143	} // if
144
145	free( real_name );
146	} else { // otherwise, print the whole line
147	cerr << "(" << frameNo << ") " << messages[i] << endl;
148	} // if
149	} // for
150
151	free( messages );
152	} // backtrace
153
154	void sigSegvBusHandler( int sig_num ) {
155	cerr << "CFA runtime error program cfa-cpp terminated with "
156	<< (sig_num == SIGSEGV ? "segment fault" : "bus error")
157	<< "." << endl;
158	backtrace( 2 ); // skip first 2 stack frames
159	//_exit( EXIT_FAILURE );
160	abort();
161	} // sigSegvBusHandler
162
163	void sigAbortHandler( __attribute__((unused)) int sig_num ) {
164	backtrace( 6 ); // skip first 6 stack frames
165	signal( SIGABRT, SIG_DFL); // reset default signal handler
166	raise( SIGABRT ); // reraise SIGABRT
167	} // sigAbortHandler
168
169
170	int main( int argc, char * argv[] ) {
171	FILE * input; // use FILE rather than istream because yyin is FILE
172	ostream *output = & cout;
173	const char *filename = nullptr;
174	list< Declaration * > translationUnit;
175
176	signal( SIGSEGV, sigSegvBusHandler );
177	signal( SIGBUS, sigSegvBusHandler );
178	signal( SIGABRT, sigAbortHandler );
179
180	// std::cout << "main" << std::endl;
181	// for ( int i = 0; i < argc; i += 1 ) {
182	// std::cout << '\t' << argv[i] << std::endl;
183	// } // for
184
185	parse_cmdline( argc, argv, filename ); // process command-line arguments
186	CodeGen::FixMain::setReplaceMain( !nomainp );
187
188	try {
189	// choose to read the program from a file or stdin
190	if ( optind < argc ) { // any commands after the flags ? => input file name
191	input = fopen( argv[ optind ], "r" );
192	assertf( input, "cannot open %s\n", argv[ optind ] );
193	// if running cfa-cpp directly, might forget to pass -F option (and really shouldn't have to)
194	if ( filename == nullptr ) filename = argv[ optind ];
195	// prelude filename comes in differently
196	if ( libcfap ) filename = "prelude.cf";
197	optind += 1;
198	} else { // no input file name
199	input = stdin;
200	// if running cfa-cpp directly, might forget to pass -F option. Since this takes from stdin, pass
201	// a fake name along
202	if ( filename == nullptr ) filename = "stdin";
203	} // if
204
205	// read in the builtins, extras, and the prelude
206	if ( ! nopreludep ) { // include gcc builtins
207	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
208
209	// Read to gcc builtins, if not generating the cfa library
210	FILE * gcc_builtins = fopen( libcfap \| treep ? "../prelude/gcc-builtins.cf" : CFA_LIBDIR "/gcc-builtins.cf", "r" );
211	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
212	parse( gcc_builtins, LinkageSpec::Compiler );
213
214	// read the extra prelude in, if not generating the cfa library
215	FILE * extras = fopen( libcfap \| treep ? "../prelude/extras.cf" : CFA_LIBDIR "/extras.cf", "r" );
216	assertf( extras, "cannot open extras.cf\n" );
217	parse( extras, LinkageSpec::BuiltinC );
218
219	if ( ! libcfap ) {
220	// read the prelude in, if not generating the cfa library
221	FILE * prelude = fopen( treep ? "../prelude/prelude.cf" : CFA_LIBDIR "/prelude.cf", "r" );
222	assertf( prelude, "cannot open prelude.cf\n" );
223	parse( prelude, LinkageSpec::Intrinsic );
224
225	// Read to cfa builtins, if not generating the cfa library
226	FILE * builtins = fopen( libcfap \| treep ? "../prelude/builtins.cf" : CFA_LIBDIR "/builtins.cf", "r" );
227	assertf( builtins, "cannot open builtins.cf\n" );
228	parse( builtins, LinkageSpec::BuiltinCFA );
229	} // if
230	} // if
231
232	parse( input, libcfap ? LinkageSpec::Intrinsic : LinkageSpec::Cforall, yydebug );
233
234	if ( parsep ) {
235	parseTree->printList( cout );
236	delete parseTree;
237	return 0;
238	} // if
239
240	buildList( parseTree, translationUnit );
241	delete parseTree;
242	parseTree = nullptr;
243
244	if ( astp ) {
245	dump( translationUnit );
246	return 0;
247	} // if
248
249	// add the assignment statement after the initialization of a type parameter
250	PASS( "validate", SymTab::validate( translationUnit, symtabp ) );
251	if ( symtabp ) {
252	deleteAll( translationUnit );
253	return 0;
254	} // if
255
256	if ( expraltp ) {
257	PassVisitor<ResolvExpr::AlternativePrinter> printer( cout );
258	acceptAll( translationUnit, printer );
259	return 0;
260	} // if
261
262	if ( validp ) {
263	dump( translationUnit );
264	return 0;
265	} // if
266
267	PASS( "fixLabels", ControlStruct::fixLabels( translationUnit ) );
268	PASS( "fixNames", CodeGen::fixNames( translationUnit ) );
269	PASS( "genInit", InitTweak::genInit( translationUnit ) );
270	PASS( "expandMemberTuples" , Tuples::expandMemberTuples( translationUnit ) );
271	if ( libcfap ) {
272	// generate the bodies of cfa library functions
273	LibCfa::makeLibCfa( translationUnit );
274	} // if
275
276	if ( declstatsp ) {
277	CodeTools::printDeclStats( translationUnit );
278	deleteAll( translationUnit );
279	return 0;
280	}
281
282	if ( bresolvep ) {
283	dump( translationUnit );
284	return 0;
285	} // if
286
287	CodeTools::fillLocations( translationUnit );
288
289	PASS( "resolve", ResolvExpr::resolve( translationUnit ) );
290	if ( exprp ) {
291	dump( translationUnit );
292	return 0;
293	} // if
294
295	// fix ObjectDecl - replaces ConstructorInit nodes
296	PASS( "fixInit", InitTweak::fix( translationUnit, filename, libcfap \|\| treep ) );
297	if ( ctorinitp ) {
298	dump ( translationUnit );
299	return 0;
300	} // if
301
302	PASS( "expandUniqueExpr", 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
303
304	PASS( "translateEHM" , ControlStruct::translateEHM( translationUnit ) );
305
306	PASS( "generateWaitfor" , Concurrency::generateWaitFor( translationUnit ) );
307
308	PASS( "convertSpecializations", GenPoly::convertSpecializations( translationUnit ) ); // needs to happen before tuple types are expanded
309
310	PASS( "expandTuples", Tuples::expandTuples( translationUnit ) ); // xxx - is this the right place for this?
311
312	if ( tuplep ) {
313	dump( translationUnit );
314	return 0;
315	}
316
317	PASS( "virtual expandCasts", Virtual::expandCasts( translationUnit ) ); // Must come after translateEHM
318
319	PASS( "instantiateGenerics", GenPoly::instantiateGeneric( translationUnit ) );
320	if ( genericsp ) {
321	dump( translationUnit );
322	return 0;
323	}
324	PASS( "convertLvalue", GenPoly::convertLvalue( translationUnit ) );
325
326
327	if ( bboxp ) {
328	dump( translationUnit );
329	return 0;
330	} // if
331	PASS( "box", GenPoly::box( translationUnit ) );
332
333	if ( bcodegenp ) {
334	dump( translationUnit );
335	return 0;
336	}
337
338	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
339	output = new ofstream( argv[ optind ] );
340	} // if
341
342	CodeTools::fillLocations( translationUnit );
343	PASS( "codegen", CodeGen::generate( translationUnit, *output, ! noprotop, prettycodegenp, true, linemarks ) );
344
345	CodeGen::FixMain::fix( *output, treep ? "../prelude/bootloader.c" : CFA_LIBDIR "/bootloader.c" );
346	if ( output != &cout ) {
347	delete output;
348	} // if
349	} catch ( SemanticErrorException &e ) {
350	if ( errorp ) {
351	cerr << "---AST at error:---" << endl;
352	dump( translationUnit, cerr );
353	cerr << endl << "---End of AST, begin error message:---\n" << endl;
354	} // if
355	e.print();
356	if ( output != &cout ) {
357	delete output;
358	} // if
359	return 1;
360	} catch ( UnimplementedError &e ) {
361	cout << "Sorry, " << e.get_what() << " is not currently implemented" << endl;
362	if ( output != &cout ) {
363	delete output;
364	} // if
365	return 1;
366	} catch ( CompilerError &e ) {
367	cerr << "Compiler Error: " << e.get_what() << endl;
368	cerr << "(please report bugs to [REDACTED])" << endl;
369	if ( output != &cout ) {
370	delete output;
371	} // if
372	return 1;
373	} catch(...) {
374	std::exception_ptr eptr = std::current_exception();
375	try {
376	if (eptr) {
377	std::rethrow_exception(eptr);
378	}
379	else {
380	std::cerr << "Exception Uncaught and Unkown" << std::endl;
381	}
382	} catch(const std::exception& e) {
383	std::cerr << "Unaught Exception \"" << e.what() << "\"\n";
384	}
385	return 1;
386	}// try
387
388	deleteAll( translationUnit );
389	if(!libcfap && !treep) HeapStats::printStats();
390	return 0;
391	} // main
392
393	void parse_cmdline( int argc, char * argv[], const char *& filename ) {
394	enum { Ast, Bbox, Bresolver, CtorInitFix, DeclStats, Expr, ExprAlt, Grammar, LibCFA, Linemarks, Nolinemarks, Nopreamble, Parse, Prototypes, Resolver, Symbol, Tree, TupleExpansion, Validate, };
395
396	static struct option long_opts[] = {
397	{ "ast", no_argument, 0, Ast },
398	{ "before-box", no_argument, 0, Bbox },
399	{ "before-resolver", no_argument, 0, Bresolver },
400	{ "ctorinitfix", no_argument, 0, CtorInitFix },
401	{ "decl-stats", no_argument, 0, DeclStats },
402	{ "expr", no_argument, 0, Expr },
403	{ "expralt", no_argument, 0, ExprAlt },
404	{ "grammar", no_argument, 0, Grammar },
405	{ "libcfa", no_argument, 0, LibCFA },
406	{ "line-marks", no_argument, 0, Linemarks },
407	{ "no-line-marks", no_argument, 0, Nolinemarks },
408	{ "no-preamble", no_argument, 0, Nopreamble },
409	{ "parse", no_argument, 0, Parse },
410	{ "no-prototypes", no_argument, 0, Prototypes },
411	{ "resolver", no_argument, 0, Resolver },
412	{ "symbol", no_argument, 0, Symbol },
413	{ "tree", no_argument, 0, Tree },
414	{ "tuple-expansion", no_argument, 0, TupleExpansion },
415	{ "validate", no_argument, 0, Validate },
416	{ 0, 0, 0, 0 }
417	}; // long_opts
418	int long_index;
419
420	opterr = 0; // (global) prevent getopt from printing error messages
421
422	bool Wsuppress = false, Werror = false;
423	int c;
424	while ( (c = getopt_long( argc, argv, "abBcCdefgGlLmnNpqrstTvwW:yzZD:F:", long_opts, &long_index )) != -1 ) {
425	switch ( c ) {
426	case Ast:
427	case 'a': // dump AST
428	astp = true;
429	break;
430	case Bresolver:
431	case 'b': // print before resolver steps
432	bresolvep = true;
433	break;
434	case 'B': // print before box steps
435	bboxp = true;
436	break;
437	case CtorInitFix:
438	case 'c': // print after constructors and destructors are replaced
439	ctorinitp = true;
440	break;
441	case 'C': // print before code generation
442	bcodegenp = true;
443	break;
444	case DeclStats:
445	case 'd':
446	declstatsp = true;
447	break;
448	case Expr:
449	case 'e': // dump AST after expression analysis
450	exprp = true;
451	break;
452	case ExprAlt:
453	case 'f': // print alternatives for expressions
454	expraltp = true;
455	break;
456	case Grammar:
457	case 'g': // bison debugging info (grammar rules)
458	yydebug = true;
459	break;
460	case 'G': // dump AST after instantiate generics
461	genericsp = true;
462	break;
463	case LibCFA:
464	case 'l': // generate libcfa.c
465	libcfap = true;
466	break;
467	case Linemarks:
468	case 'L': // print lines marks
469	linemarks = true;
470	break;
471	case Nopreamble:
472	case 'n': // do not read preamble
473	nopreludep = true;
474	break;
475	case Nolinemarks:
476	case 'N': // suppress line marks
477	linemarks = false;
478	break;
479	case Prototypes:
480	case 'p': // generate prototypes for preamble functions
481	noprotop = true;
482	break;
483	case 'm': // don't replace the main
484	nomainp = true;
485	break;
486	case Parse:
487	case 'q': // dump parse tree
488	parsep = true;
489	break;
490	case Resolver:
491	case 'r': // print resolver steps
492	resolvep = true;
493	break;
494	case Symbol:
495	case 's': // print symbol table events
496	symtabp = true;
497	break;
498	case Tree:
499	case 't': // build in tree
500	treep = true;
501	break;
502	case TupleExpansion:
503	case 'T': // print after tuple expansion
504	tuplep = true;
505	break;
506	case 'v': // dump AST after decl validation pass
507	validp = true;
508	break;
509	case 'w':
510	Wsuppress = true;
511	break;
512	case 'W':
513	if ( strcmp( optarg, "all" ) == 0 ) {
514	SemanticWarning_EnableAll();
515	} else if ( strcmp( optarg, "error" ) == 0 ) {
516	Werror = true;
517	} else {
518	char * warning = optarg;
519	Severity s;
520	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
521	warning += 3;
522	s = Severity::Suppress;
523	} else {
524	s = Severity::Warn;
525	} // if
526	SemanticWarning_Set( warning, s );
527	} // if
528	break;
529	case 'y': // dump AST on error
530	errorp = true;
531	break;
532	case 'z': // dump as codegen rather than AST
533	codegenp = true;
534	break;
535	case 'Z': // prettyprint during codegen (i.e. print unmangled names, etc.)
536	prettycodegenp = true;
537	break;
538	case 'D': // ignore -Dxxx
539	break;
540	case 'F': // source file-name without suffix
541	filename = optarg;
542	break;
543	case '?':
544	if ( optopt ) { // short option ?
545	assertf( false, "Unknown option: -%c\n", (char)optopt );
546	} else {
547	assertf( false, "Unknown option: %s\n", argv[optind - 1] );
548	} // if
549	#if defined(__GNUC__) && __GNUC__ >= 7
550	__attribute__((fallthrough));
551	#endif
552	default:
553	abort();
554	} // switch
555	} // while
556
557	if ( Werror ) {
558	SemanticWarning_WarningAsError();
559	} // if
560	if ( Wsuppress ) {
561	SemanticWarning_SuppressAll();
562	} // if
563	// for ( const auto w : WarningFormats ) {
564	// cout << w.name << ' ' << (int)w.severity << endl;
565	// } // for
566	} // parse_cmdline
567
568	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit ) {
569	extern int yyparse( void );
570	extern FILE * yyin;
571	extern int yylineno;
572
573	::linkage = linkage; // set globals
574	yyin = input;
575	yylineno = 1;
576	int parseStatus = yyparse();
577
578	fclose( input );
579	if ( shouldExit \|\| parseStatus != 0 ) {
580	exit( parseStatus );
581	} // if
582	} // parse
583
584	static bool notPrelude( Declaration * decl ) {
585	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
586	} // notPrelude
587
588	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
589	list< Declaration * > decls;
590
591	if ( noprotop ) {
592	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
593	} else {
594	decls = translationUnit;
595	} // if
596
597	// depending on commandline options, either generate code or dump the AST
598	if ( codegenp ) {
599	CodeGen::generate( decls, out, ! noprotop, prettycodegenp );
600	} else {
601	printAll( decls, out );
602	}
603	deleteAll( translationUnit );
604	} // dump
605
606	// Local Variables: //
607	// tab-width: 4 //
608	// mode: c++ //
609	// compile-command: "make install" //
610	// End: //

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