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source: src/main.cc @ 2efe4b8

new-envwith_gc

Last change on this file since 2efe4b8 was bd06384, checked in by Aaron Moss <a3moss@…>, 6 years ago
Add static roots to GC; fix some static GC_Objects
Property mode set to `100644`
File size: 18.8 KB

Line
1
2	//
3	// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
4	//
5	// The contents of this file are covered under the licence agreement in the
6	// file "LICENCE" distributed with Cforall.
7	//
8	// main.cc --
9	//
10	// Author : Richard C. Bilson
11	// Created On : Fri May 15 23:12:02 2015
12	// Last Modified By : Peter A. Buhr
13	// Last Modified On : Tue Oct 31 12:22:40 2017
14	// Update Count : 445
15	//
16
17	#include <cxxabi.h> // for __cxa_demangle
18	#include <execinfo.h> // for backtrace, backtrace_symbols
19	#include <getopt.h> // for no_argument, optind, geto...
20	#include <signal.h> // for signal, SIGABRT, SIGSEGV
21	#include <cassert> // for assertf
22	#include <cstdio> // for fopen, FILE, fclose, stdin
23	#include <cstdlib> // for exit, free, abort, EXIT_F...
24	#include <cstring> // for index
25	#include <fstream> // for ofstream
26	#include <iostream> // for operator<<, basic_ostream
27	#include <iterator> // for back_inserter
28	#include <list> // for list
29	#include <string> // for char_traits, operator<<
30
31	#include "../config.h" // for CFA_LIBDIR
32	#include "CodeGen/FixMain.h" // for FixMain
33	#include "CodeGen/FixNames.h" // for fixNames
34	#include "CodeGen/Generate.h" // for generate
35	#include "CodeTools/DeclStats.h" // for printDeclStats
36	#include "CodeTools/TrackLoc.h" // for fillLocations
37	#include "Common/PassVisitor.h"
38	#include "Common/CompilerError.h" // for CompilerError
39	#include "Common/GC.h" // for GC
40	#include "Common/SemanticError.h" // for SemanticError
41	#include "Common/UnimplementedError.h" // for UnimplementedError
42	#include "Common/utility.h" // for deleteAll, filter, printAll
43	#include "Concurrency/Waitfor.h" // for generateWaitfor
44	#include "ControlStruct/ExceptTranslate.h" // for translateEHM
45	#include "ControlStruct/Mutate.h" // for mutate
46	#include "GenPoly/Box.h" // for box
47	#include "GenPoly/InstantiateGeneric.h" // for instantiateGeneric
48	#include "GenPoly/Lvalue.h" // for convertLvalue
49	#include "GenPoly/Specialize.h" // for convertSpecializations
50	#include "InitTweak/FixInit.h" // for fix
51	#include "InitTweak/GenInit.h" // for genInit
52	#include "MakeLibCfa.h" // for makeLibCfa
53	#include "Parser/LinkageSpec.h" // for Spec, Cforall, Intrinsic
54	#include "Parser/ParseNode.h" // for DeclarationNode, buildList
55	#include "Parser/TypedefTable.h" // for TypedefTable
56	#include "ResolvExpr/AlternativePrinter.h" // for AlternativePrinter
57	#include "ResolvExpr/Resolver.h" // for resolve
58	#include "SymTab/Validate.h" // for validate
59	#include "SynTree/Declaration.h" // for Declaration
60	#include "SynTree/GcTracer.h" // for GC << TranslationUnit
61	#include "SynTree/Visitor.h" // for acceptAll
62	#include "Tuples/Tuples.h" // for expandMemberTuples, expan...
63	#include "Virtual/ExpandCasts.h" // for expandCasts
64
65	using namespace std;
66
67	#define OPTPRINT(x) if ( errorp ) cerr << x << endl;
68
69	LinkageSpec::Spec linkage = LinkageSpec::Cforall;
70	TypedefTable typedefTable;
71	DeclarationNode * parseTree = nullptr; // program parse tree
72
73	extern int yydebug; // set for -g flag (Grammar)
74	bool
75	astp = false,
76	bresolvep = false,
77	bboxp = false,
78	bcodegenp = false,
79	ctorinitp = false,
80	declstatsp = false,
81	exprp = false,
82	expraltp = false,
83	genericsp = false,
84	libcfap = false,
85	nopreludep = false,
86	noprotop = false,
87	nomainp = false,
88	parsep = false,
89	resolvep = false, // used in AlternativeFinder
90	symtabp = false,
91	treep = false,
92	tuplep = false,
93	validp = false,
94	errorp = false,
95	codegenp = false,
96	prettycodegenp = false,
97	linemarks = false;
98
99	static void parse_cmdline( int argc, char argv[], const char & filename );
100	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit = false );
101	static void dump( list< Declaration * > & translationUnit, ostream & out = cout );
102
103	static void backtrace( int start ) { // skip first N stack frames
104	enum { Frames = 50 };
105	void * array[Frames];
106	int size = ::backtrace( array, Frames );
107	char ** messages = ::backtrace_symbols( array, size ); // does not demangle names
108
109	*index( messages[0], '(' ) = '\0'; // find executable name
110	cerr << "Stack back trace for: " << messages[0] << endl;
111
112	// skip last 2 stack frames after main
113	for ( int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
114	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
115	for ( char p = messages[i]; p; ++p ) { // find parantheses and +offset
116	if ( *p == '(' ) {
117	mangled_name = p;
118	} else if ( *p == '+' ) {
119	offset_begin = p;
120	} else if ( *p == ')' ) {
121	offset_end = p;
122	break;
123	} // if
124	} // for
125
126	// if line contains symbol, attempt to demangle
127	int frameNo = i - start;
128	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
129	*mangled_name++ = '\0'; // delimit strings
130	*offset_begin++ = '\0';
131	*offset_end++ = '\0';
132
133	int status;
134	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
135	// bug in __cxa_demangle for single-character lower-case non-mangled names
136	if ( status == 0 ) { // demangling successful ?
137	cerr << "(" << frameNo << ") " << messages[i] << " : "
138	<< real_name << "+" << offset_begin << offset_end << endl;
139	} else { // otherwise, output mangled name
140	cerr << "(" << frameNo << ") " << messages[i] << " : "
141	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
142	} // if
143
144	free( real_name );
145	} else { // otherwise, print the whole line
146	cerr << "(" << frameNo << ") " << messages[i] << endl;
147	} // if
148	} // for
149
150	free( messages );
151	} // backtrace
152
153	void sigSegvBusHandler( int sig_num ) {
154	cerr << "CFA runtime error program cfa-cpp terminated with "
155	<< (sig_num == SIGSEGV ? "segment fault" : "bus error")
156	<< "." << endl;
157	backtrace( 2 ); // skip first 2 stack frames
158	exit( EXIT_FAILURE );
159	} // sigSegvBusHandler
160
161	void sigAbortHandler( __attribute__((unused)) int sig_num ) {
162	backtrace( 6 ); // skip first 6 stack frames
163	signal( SIGABRT, SIG_DFL); // reset default signal handler
164	raise( SIGABRT ); // reraise SIGABRT
165	} // sigAbortHandler
166
167
168	int main( int argc, char * argv[] ) {
169	FILE * input; // use FILE rather than istream because yyin is FILE
170	ostream *output = & cout;
171	const char *filename = nullptr;
172	list< Declaration * > translationUnit;
173
174	signal( SIGSEGV, sigSegvBusHandler );
175	signal( SIGBUS, sigSegvBusHandler );
176	signal( SIGABRT, sigAbortHandler );
177
178	parse_cmdline( argc, argv, filename ); // process command-line arguments
179	CodeGen::FixMain::setReplaceMain( !nomainp );
180
181	try {
182	// choose to read the program from a file or stdin
183	if ( optind < argc ) { // any commands after the flags ? => input file name
184	input = fopen( argv[ optind ], "r" );
185	assertf( input, "cannot open %s\n", argv[ optind ] );
186	// if running cfa-cpp directly, might forget to pass -F option (and really shouldn't have to)
187	if ( filename == nullptr ) filename = argv[ optind ];
188	// prelude filename comes in differently
189	if ( libcfap ) filename = "prelude.cf";
190	optind += 1;
191	} else { // no input file name
192	input = stdin;
193	// if running cfa-cpp directly, might forget to pass -F option. Since this takes from stdin, pass
194	// a fake name along
195	if ( filename == nullptr ) filename = "stdin";
196	} // if
197
198	// read in the builtins, extras, and the prelude
199	if ( ! nopreludep ) { // include gcc builtins
200	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
201
202	// Read to gcc builtins, if not generating the cfa library
203	FILE * gcc_builtins = fopen( libcfap \| treep ? "../prelude/gcc-builtins.cf" : CFA_LIBDIR "/gcc-builtins.cf", "r" );
204	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
205	parse( gcc_builtins, LinkageSpec::Compiler );
206
207	// read the extra prelude in, if not generating the cfa library
208	FILE * extras = fopen( libcfap \| treep ? "../prelude/extras.cf" : CFA_LIBDIR "/extras.cf", "r" );
209	assertf( extras, "cannot open extras.cf\n" );
210	parse( extras, LinkageSpec::BuiltinC );
211
212	if ( ! libcfap ) {
213	// read the prelude in, if not generating the cfa library
214	FILE * prelude = fopen( treep ? "../prelude/prelude.cf" : CFA_LIBDIR "/prelude.cf", "r" );
215	assertf( prelude, "cannot open prelude.cf\n" );
216	parse( prelude, LinkageSpec::Intrinsic );
217
218	// Read to cfa builtins, if not generating the cfa library
219	FILE * builtins = fopen( libcfap \| treep ? "../prelude/builtins.cf" : CFA_LIBDIR "/builtins.cf", "r" );
220	assertf( builtins, "cannot open builtins.cf\n" );
221	parse( builtins, LinkageSpec::BuiltinCFA );
222	} // if
223	} // if
224
225	parse( input, libcfap ? LinkageSpec::Intrinsic : LinkageSpec::Cforall, yydebug );
226
227	if ( parsep ) {
228	parseTree->printList( cout );
229	delete parseTree;
230	return 0;
231	} // if
232
233	buildList( parseTree, translationUnit );
234	delete parseTree;
235	parseTree = nullptr;
236	collect( translationUnit );
237
238	if ( astp ) {
239	dump( translationUnit );
240	return 0;
241	} // if
242
243	// add the assignment statement after the initialization of a type parameter
244	OPTPRINT( "validate" )
245	SymTab::validate( translationUnit, symtabp );
246	if ( symtabp ) return 0;
247	collect( translationUnit );
248
249	if ( expraltp ) {
250	PassVisitor<ResolvExpr::AlternativePrinter> printer( cout );
251	acceptAll( translationUnit, printer );
252	return 0;
253	} // if
254
255	if ( validp ) {
256	dump( translationUnit );
257	return 0;
258	} // if
259
260	OPTPRINT( "mutate" )
261	ControlStruct::mutate( translationUnit );
262	OPTPRINT( "fixNames" )
263	CodeGen::fixNames( translationUnit );
264	OPTPRINT( "genInit" )
265	InitTweak::genInit( translationUnit );
266	OPTPRINT( "expandMemberTuples" );
267	Tuples::expandMemberTuples( translationUnit );
268	collect( translationUnit );
269	if ( libcfap ) {
270	// generate the bodies of cfa library functions
271	LibCfa::makeLibCfa( translationUnit );
272	} // if
273
274	if ( declstatsp ) {
275	CodeTools::printDeclStats( translationUnit );
276	return 0;
277	}
278
279	if ( bresolvep ) {
280	dump( translationUnit );
281	return 0;
282	} // if
283
284	CodeTools::fillLocations( translationUnit );
285
286	OPTPRINT( "resolve" )
287	ResolvExpr::resolve( translationUnit );
288	collect( translationUnit );
289	if ( exprp ) {
290	dump( translationUnit );
291	return 0;
292	} // if
293
294	// fix ObjectDecl - replaces ConstructorInit nodes
295	OPTPRINT( "fixInit" )
296	InitTweak::fix( translationUnit, filename, libcfap \|\| treep );
297	collect( translationUnit );
298	if ( ctorinitp ) {
299	dump ( translationUnit );
300	return 0;
301	} // if
302
303	OPTPRINT( "expandUniqueExpr" ); // xxx - is this the right place for this? want to expand ASAP so that subsequent 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
304	Tuples::expandUniqueExpr( translationUnit );
305
306	OPTPRINT( "translateEHM" );
307	ControlStruct::translateEHM( translationUnit );
308
309	OPTPRINT( "generateWaitfor" );
310	Concurrency::generateWaitFor( translationUnit );
311
312	OPTPRINT( "convertSpecializations" ) // needs to happen before tuple types are expanded
313	GenPoly::convertSpecializations( translationUnit );
314
315	OPTPRINT( "expandTuples" ); // xxx - is this the right place for this?
316	Tuples::expandTuples( translationUnit );
317	collect( translationUnit );
318	if ( tuplep ) {
319	dump( translationUnit );
320	return 0;
321	}
322
323	OPTPRINT( "virtual expandCasts" ) // Must come after translateEHM
324	Virtual::expandCasts( translationUnit );
325
326	OPTPRINT("instantiateGenerics")
327	GenPoly::instantiateGeneric( translationUnit );
328	collect( translationUnit );
329	if ( genericsp ) {
330	dump( translationUnit );
331	return 0;
332	}
333
334	OPTPRINT( "convertLvalue" )
335	GenPoly::convertLvalue( translationUnit );
336	collect( translationUnit );
337	if ( bboxp ) {
338	dump( translationUnit );
339	return 0;
340	} // if
341
342	OPTPRINT( "box" )
343	GenPoly::box( translationUnit );
344	collect( translationUnit );
345	if ( bcodegenp ) {
346	dump( translationUnit );
347	return 0;
348	}
349
350	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
351	output = new ofstream( argv[ optind ] );
352	} // if
353
354	CodeTools::fillLocations( translationUnit );
355	OPTPRINT( "codegen" )
356	CodeGen::generate( translationUnit, *output, ! noprotop, prettycodegenp, true, linemarks );
357
358	CodeGen::FixMain::fix( *output, treep ? "../prelude/bootloader.c" : CFA_LIBDIR "/bootloader.c" );
359	OPTPRINT( "end" )
360
361	if ( output != &cout ) {
362	delete output;
363	} // if
364	} catch ( SemanticErrorException &e ) {
365	if ( errorp ) {
366	cerr << "---AST at error:---" << endl;
367	dump( translationUnit, cerr );
368	cerr << endl << "---End of AST, begin error message:---\n" << endl;
369	} // if
370	e.print();
371	if ( output != &cout ) {
372	delete output;
373	} // if
374	return 1;
375	} catch ( UnimplementedError &e ) {
376	cout << "Sorry, " << e.get_what() << " is not currently implemented" << endl;
377	if ( output != &cout ) {
378	delete output;
379	} // if
380	return 1;
381	} catch ( CompilerError &e ) {
382	cerr << "Compiler Error: " << e.get_what() << endl;
383	cerr << "(please report bugs to [REDACTED])" << endl;
384	if ( output != &cout ) {
385	delete output;
386	} // if
387	return 1;
388	} // try
389
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	int c;
423	while ( (c = getopt_long( argc, argv, "abBcCdefgGlLmnNpqrstTvyzZD:F:", long_opts, &long_index )) != -1 ) {
424	switch ( c ) {
425	case Ast:
426	case 'a': // dump AST
427	astp = true;
428	break;
429	case Bresolver:
430	case 'b': // print before resolver steps
431	bresolvep = true;
432	break;
433	case 'B': // print before box steps
434	bboxp = true;
435	break;
436	case CtorInitFix:
437	case 'c': // print after constructors and destructors are replaced
438	ctorinitp = true;
439	break;
440	case 'C': // print before code generation
441	bcodegenp = true;
442	break;
443	case DeclStats:
444	case 'd':
445	declstatsp = true;
446	break;
447	case Expr:
448	case 'e': // dump AST after expression analysis
449	exprp = true;
450	break;
451	case ExprAlt:
452	case 'f': // print alternatives for expressions
453	expraltp = true;
454	break;
455	case Grammar:
456	case 'g': // bison debugging info (grammar rules)
457	yydebug = true;
458	break;
459	case 'G': // dump AST after instantiate generics
460	genericsp = true;
461	break;
462	case LibCFA:
463	case 'l': // generate libcfa.c
464	libcfap = true;
465	break;
466	case Linemarks:
467	case 'L': // print lines marks
468	linemarks = true;
469	break;
470	case Nopreamble:
471	case 'n': // do not read preamble
472	nopreludep = true;
473	break;
474	case Nolinemarks:
475	case 'N': // suppress line marks
476	linemarks = false;
477	break;
478	case Prototypes:
479	case 'p': // generate prototypes for preamble functions
480	noprotop = true;
481	break;
482	case 'm': // don't replace the main
483	nomainp = true;
484	break;
485	case Parse:
486	case 'q': // dump parse tree
487	parsep = true;
488	break;
489	case Resolver:
490	case 'r': // print resolver steps
491	resolvep = true;
492	break;
493	case Symbol:
494	case 's': // print symbol table events
495	symtabp = true;
496	break;
497	case Tree:
498	case 't': // build in tree
499	treep = true;
500	break;
501	case TupleExpansion:
502	case 'T': // print after tuple expansion
503	tuplep = true;
504	break;
505	case 'v': // dump AST after decl validation pass
506	validp = true;
507	break;
508	case 'y': // dump AST on error
509	errorp = true;
510	break;
511	case 'z': // dump as codegen rather than AST
512	codegenp = true;
513	break;
514	case 'Z': // prettyprint during codegen (i.e. print unmangled names, etc.)
515	prettycodegenp = true;
516	break;
517	case 'D': // ignore -Dxxx
518	break;
519	case 'F': // source file-name without suffix
520	filename = optarg;
521	break;
522	case '?':
523	if ( optopt ) { // short option ?
524	assertf( false, "Unknown option: -%c\n", (char)optopt );
525	} else {
526	assertf( false, "Unknown option: %s\n", argv[optind - 1] );
527	} // if
528	#if __GNUC__ < 7
529	#else
530	__attribute__((fallthrough));
531	#endif
532	default:
533	abort();
534	} // switch
535	} // while
536	} // parse_cmdline
537
538	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit ) {
539	extern int yyparse( void );
540	extern FILE * yyin;
541	extern int yylineno;
542
543	::linkage = linkage; // set globals
544	yyin = input;
545	yylineno = 1;
546	typedefTable.enterScope();
547	int parseStatus = yyparse();
548
549	fclose( input );
550	if ( shouldExit \|\| parseStatus != 0 ) {
551	exit( parseStatus );
552	} // if
553	} // parse
554
555	static bool notPrelude( Declaration * decl ) {
556	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
557	} // notPrelude
558
559	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
560	list< Declaration * > decls;
561
562	if ( noprotop ) {
563	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
564	} else {
565	decls = translationUnit;
566	} // if
567
568	// depending on commandline options, either generate code or dump the AST
569	if ( codegenp ) {
570	CodeGen::generate( decls, out, ! noprotop, prettycodegenp );
571	} else {
572	printAll( decls, out );
573	}
574	} // dump
575
576	// Local Variables: //
577	// tab-width: 4 //
578	// mode: c++ //
579	// compile-command: "make install" //
580	// End: //

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