source: src/main.cpp@ 3e2e9b2

Last change on this file since 3e2e9b2 was f660b10, checked in by Andrew Beach <ajbeach@…>, 12 months ago

Moved the backtrace/signal code to the bottom of the main file (so people don't have to scroll past it.
  • Property mode set to 100644
File size: 28.3 KB
Line 
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
90using namespace std;
91
92static 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
120static bool waiting_for_gdb = false; // flag to set cfa-cpp to wait for gdb on start
121
122static string PreludeDirector = "";
123
124static void parse_cmdline( int argc, char * argv[] );
125static void dump( ast::TranslationUnit && transUnit, ostream & out = cout );
126
127static void backtrace( int start );
128static void initSignals();
129
130int 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
361static const char optstring[] = ":c:ghilLmNnpdP:S:twW:D:";
362
363enum { PreludeDir = 128 };
364static 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
386static 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
407static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
408
409static 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};
436enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
437
438static 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
465static 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
585static bool notPrelude( ast::ptr<ast::Decl> & decl ) {
586 return !decl->linkage.is_builtin;
587}
588
589static 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
606static 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
659static 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
669static 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
675static 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
681static 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
692static 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
709static 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
715static 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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