libstdc++-v3/testsuite/util/testsuite_abi.cc

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010
   4 // Free Software Foundation, Inc.
   5
   6 // This library is free software; you can redistribute it and/or
   7 // modify it under the terms of the GNU General Public License as
   8 // published by the Free Software Foundation; either version 3, or (at
   9 // your option) any later version.
  10
  11 // This library is distributed in the hope that it will be useful, but
  12 // WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 // General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License
  17 // along with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20
  21 // Benjamin Kosnik  <bkoz@redhat.com>
  22
  23 #include "testsuite_abi.h"
  24 #include <cstdlib>
  25 #include <sstream>
  26 #include <fstream>
  27 #include <iostream>
  28 #include <vector>
  29 #include <algorithm>
  30
  31 using namespace std;
  32
  33 void
  34 symbol::init(string& data)
  35 {
  36   const char delim = ':';
  37   const char version_delim = '@';
  38   const string::size_type npos = string::npos;
  39   string::size_type n = 0;
  40
  41   // Set the type.
  42   if (data.find("FUNC") == 0)
  43     type = symbol::function;
  44   else if (data.find("OBJECT") == 0)
  45     type = symbol::object;
  46   else if (data.find("TLS") == 0)
  47     type = symbol::tls;
  48
  49   n = data.find_first_of(delim);
  50   if (n != npos)
  51     data.erase(data.begin(), data.begin() + n + 1);
  52
  53   // Iff object or TLS, get size info.
  54   if (type == symbol::object || type == symbol::tls)
  55     {
  56       n = data.find_first_of(delim);
  57       if (n != npos)
  58         {
  59           string objectsize(data.begin(), data.begin() + n);
  60           istringstream iss(objectsize);
  61           int x;
  62           iss >> x;
  63           if (!iss.fail())
  64             size = x;
  65           data.erase(data.begin(), data.begin() + n + 1);
  66         }
  67     }
  68
  69   // Set the name and raw_name.
  70   raw_name = string(data.begin(), data.end());
  71   n = data.find_first_of(version_delim);
  72   if (n != npos)
  73     {
  74       // Found version string.
  75       name = string(data.begin(), data.begin() + n);
  76       n = data.find_last_of(version_delim);
  77       data.erase(data.begin(), data.begin() + n + 1);
  78
  79       // Set version name.
  80       version_name = data;
  81     }
  82   else
  83     {
  84       // No versioning info.
  85       name = string(data.begin(), data.end());
  86       version_status = symbol::none;
  87     }
  88
  89   // Set the demangled name.
  90   demangled_name = demangle(name);
  91 }
  92
  93 void
  94 symbol::print() const
  95 {
  96   const char tab = '\t';
  97   cout << name << endl;
  98
  99   if (demangled_name != name)
 100     cout << demangled_name << endl;
 101
 102   string vers;
 103   switch (version_status)
 104     {
 105     case none:
 106       vers = "none";
 107       break;
 108     case compatible:
 109       vers = "compatible";
 110       break;
 111     case incompatible:
 112       vers = "incompatible";
 113       break;
 114      case unversioned:
 115       vers = "unversioned";
 116       break;
 117    default:
 118       vers = "<default>";
 119     }
 120   cout << "version status: " << vers << endl;
 121
 122   if (version_name.size()
 123       && (version_status == compatible || version_status == incompatible))
 124     cout << version_name << endl;
 125
 126   string type_string;
 127   switch (type)
 128     {
 129     case function:
 130       type_string = "function";
 131       break;
 132     case object:
 133       type_string = "object";
 134       break;
 135     case tls:
 136       type_string = "tls";
 137       break;
 138     case uncategorized:
 139       type_string = "uncategorized";
 140       break;
 141     default:
 142       type_string = "<default>";
 143     }
 144   cout << "type: " << type_string << endl;
 145
 146   if (type == object || type == tls)
 147     cout << "type size: " << size << endl;
 148
 149   string status_string;
 150   switch (status)
 151     {
 152     case added:
 153       status_string = "added";
 154       break;
 155     case subtracted:
 156       status_string = "subtracted";
 157       break;
 158     case undesignated:
 159       status_string = "undesignated";
 160       break;
 161     default:
 162       status_string = "<default>";
 163     }
 164   cout << "status: " << status_string << endl;
 165
 166   cout << endl;
 167 }
 168
 169
 170 bool
 171 check_version(symbol& test, bool added)
 172 {
 173   // Construct list of compatible versions.
 174   typedef std::vector<std::string> compat_list;
 175   static compat_list known_versions;
 176   if (known_versions.empty())
 177     {
 178       // NB: First version here must be the default version for this
 179       // version of DT_SONAME.
 180       known_versions.push_back("GLIBCXX_3.4");
 181       known_versions.push_back("GLIBCXX_3.4.1");
 182       known_versions.push_back("GLIBCXX_3.4.2");
 183       known_versions.push_back("GLIBCXX_3.4.3");
 184       known_versions.push_back("GLIBCXX_3.4.4");
 185       known_versions.push_back("GLIBCXX_3.4.5");
 186       known_versions.push_back("GLIBCXX_3.4.6");
 187       known_versions.push_back("GLIBCXX_3.4.7");
 188       known_versions.push_back("GLIBCXX_3.4.8");
 189       known_versions.push_back("GLIBCXX_3.4.9");
 190       known_versions.push_back("GLIBCXX_3.4.10");
 191       known_versions.push_back("GLIBCXX_3.4.11");
 192       known_versions.push_back("GLIBCXX_3.4.12");
 193       known_versions.push_back("GLIBCXX_3.4.13");
 194       known_versions.push_back("GLIBCXX_3.4.14");
 195       known_versions.push_back("GLIBCXX_3.4.15");
 196       known_versions.push_back("GLIBCXX_3.4.16");
 197       known_versions.push_back("GLIBCXX_LDBL_3.4");
 198       known_versions.push_back("GLIBCXX_LDBL_3.4.7");
 199       known_versions.push_back("GLIBCXX_LDBL_3.4.10");
 200       known_versions.push_back("CXXABI_1.3");
 201       known_versions.push_back("CXXABI_1.3.1");
 202       known_versions.push_back("CXXABI_1.3.2");
 203       known_versions.push_back("CXXABI_1.3.3");
 204       known_versions.push_back("CXXABI_1.3.4");
 205       known_versions.push_back("CXXABI_1.3.5");
 206       known_versions.push_back("CXXABI_LDBL_1.3");
 207     }
 208   compat_list::iterator begin = known_versions.begin();
 209   compat_list::iterator end = known_versions.end();
 210
 211   // Check for compatible version.
 212   if (test.version_name.size())
 213     {
 214       compat_list::iterator it1 = find(begin, end, test.version_name);
 215       compat_list::iterator it2 = find(begin, end, test.name);
 216       if (it1 != end)
 217         test.version_status = symbol::compatible;
 218       else
 219         test.version_status = symbol::incompatible;
 220
 221       // Check that added symbols aren't added in the base version.
 222       if (added && test.version_name == known_versions[0])
 223         test.version_status = symbol::incompatible;
 224
 225       // Check that long double compatibility symbols demangled as
 226       // __float128 are put into some _LDBL_ version name.
 227       if (added && test.demangled_name.find("__float128") != std::string::npos)
 228         {
 229           // Has to be in _LDBL_ version name.
 230           if (test.version_name.find("_LDBL_") == std::string::npos)
 231             test.version_status = symbol::incompatible;
 232         }
 233
 234       // Check for weak label.
 235       if (it1 == end && it2 == end)
 236         test.version_status = symbol::incompatible;
 237
 238       // Check that
 239       // GLIBCXX_3.4
 240       // GLIBCXX_3.4.5
 241       // version as compatible
 242       // XXX
 243     }
 244   else
 245     {
 246       if (added)
 247         {
 248           // New version labels are ok. The rest are not.
 249           compat_list::iterator it2 = find(begin, end, test.name);
 250           if (it2 != end)
 251             test.version_status = symbol::compatible;
 252           else
 253             test.version_status = symbol::incompatible;
 254         }
 255     }
 256   return test.version_status == symbol::compatible;
 257 }
 258
 259 bool
 260 check_compatible(symbol& lhs, symbol& rhs, bool verbose)
 261 {
 262   bool ret = true;
 263   const char tab = '\t';
 264
 265   // Check to see if symbol_objects are compatible.
 266   if (lhs.type != rhs.type)
 267     {
 268       ret = false;
 269       if (verbose)
 270         cout << tab << "incompatible types" << endl;
 271     }
 272
 273   if (lhs.name != rhs.name)
 274     {
 275       ret = false;
 276       if (verbose)
 277         cout << tab << "incompatible names" << endl;
 278     }
 279
 280   if (lhs.size != rhs.size)
 281     {
 282       ret = false;
 283       if (verbose)
 284         {
 285           cout << tab << "incompatible sizes" << endl;
 286           cout << tab << lhs.size << endl;
 287           cout << tab << rhs.size << endl;
 288         }
 289     }
 290
 291   if (lhs.version_name != rhs.version_name
 292       && !check_version(lhs) && !check_version(rhs))
 293     {
 294       ret = false;
 295       if (verbose)
 296         {
 297           cout << tab << "incompatible versions" << endl;
 298           cout << tab << lhs.version_name << endl;
 299           cout << tab << rhs.version_name << endl;
 300         }
 301     }
 302
 303   if (verbose)
 304     cout << endl;
 305
 306   return ret;
 307 }
 308
 309
 310 inline bool
 311 has_symbol(const string& name, const symbols& s) throw()
 312 { return s.find(name) != s.end(); }
 313
 314 const symbol&
 315 get_symbol(const string& name, const symbols& s)
 316 {
 317   symbols::const_iterator i = s.find(name);
 318   if (i != s.end())
 319     {
 320       return i->second;
 321     }
 322   else
 323     {
 324       ostringstream os;
 325       os << "get_symbol failed for symbol " << name;
 326       __throw_logic_error(os.str().c_str());
 327     }
 328 }
 329
 330 void
 331 examine_symbol(const char* name, const char* file)
 332 {
 333   try
 334     {
 335       symbols s = create_symbols(file);
 336       const symbol& sym = get_symbol(name, s);
 337       sym.print();
 338     }
 339   catch(...)
 340     { __throw_exception_again; }
 341 }
 342
 343 int
 344 compare_symbols(const char* baseline_file, const char* test_file,
 345                 bool verbose)
 346 {
 347   // Input both lists of symbols into container.
 348   symbols baseline = create_symbols(baseline_file);
 349   symbols test = create_symbols(test_file);
 350
 351   //  Sanity check results.
 352   if (!baseline.size() || !test.size())
 353     {
 354       cerr << "Problems parsing the list of exported symbols." << endl;
 355       exit(2);
 356     }
 357
 358   // Check to see if any long double compatibility symbols are produced.
 359   bool ld_version_found(false);
 360   symbols::iterator li(test.begin());
 361   while (!ld_version_found && li != test.end())
 362     {
 363       if (li->second.version_name.find("_LDBL_") != std::string::npos)
 364         ld_version_found = true;
 365       ++li;
 366     }
 367
 368   // Sort out names.
 369   // Assuming all baseline names and test names are both unique w/ no
 370   // duplicates.
 371   //
 372   // The names added to missing_names are baseline names not found in
 373   // test names
 374   // -> symbols that have been deleted.
 375   //
 376   // The names added to added_names are test names not in
 377   // baseline names
 378   // -> symbols that have been added.
 379   typedef std::vector<std::string> symbol_names;
 380   symbol_names shared_names;
 381   symbol_names missing_names;
 382   symbol_names added_names;
 383   for (li = test.begin(); li != test.end(); ++li)
 384     added_names.push_back(li->first);
 385
 386   for (symbols::iterator i = baseline.begin(); i != baseline.end(); ++i)
 387     {
 388       string name(i->first);
 389       symbol_names::iterator end = added_names.end();
 390       symbol_names::iterator it = find(added_names.begin(), end, name);
 391       if (it != end)
 392         {
 393           // Found.
 394           shared_names.push_back(name);
 395           added_names.erase(it);
 396         }
 397        else
 398         {
 399           // Iff no test long double compatibility symbols at all and the symbol
 400           // missing is a baseline long double compatibility symbol, skip.
 401           string version_name(i->second.version_name);
 402           bool base_ld(version_name.find("_LDBL_") != std::string::npos);
 403           if (!base_ld || base_ld && ld_version_found)
 404             missing_names.push_back(name);
 405         }
 406     }
 407
 408   // Fill out list of incompatible symbols.
 409   typedef pair<symbol, symbol> symbol_pair;
 410   vector<symbol_pair> incompatible;
 411
 412   // Check missing names for compatibility.
 413   for (size_t j = 0; j < missing_names.size(); ++j)
 414     {
 415       symbol& sbase = baseline[missing_names[j]];
 416       sbase.status = symbol::subtracted;
 417       incompatible.push_back(symbol_pair(sbase, sbase));
 418     }
 419
 420   // Check shared names for compatibility.
 421   const symbol_names::size_type shared_size = shared_names.size();
 422   for (size_t k = 0; k < shared_size; ++k)
 423     {
 424       symbol& sbase = baseline[shared_names[k]];
 425       symbol& stest = test[shared_names[k]];
 426       stest.status = symbol::existing;
 427       if (!check_compatible(sbase, stest))
 428         incompatible.push_back(symbol_pair(sbase, stest));
 429     }
 430
 431   // Check added names for compatibility.
 432   const symbol_names::size_type added_size = added_names.size();
 433   for (size_t l = 0; l < added_size; ++l)
 434     {
 435       symbol& stest = test[added_names[l]];
 436       stest.status = symbol::added;
 437       if (!check_version(stest, true))
 438         incompatible.push_back(symbol_pair(stest, stest));
 439     }
 440
 441   // Report results.
 442   if (verbose && added_names.size())
 443     {
 444       cout << endl << added_names.size() << " added symbols " << endl;
 445       for (size_t j = 0; j < added_names.size() ; ++j)
 446         {
 447           cout << j << endl;
 448           test[added_names[j]].print();
 449         }
 450     }
 451
 452   if (verbose && missing_names.size())
 453     {
 454       cout << endl << missing_names.size() << " missing symbols " << endl;
 455       for (size_t j = 0; j < missing_names.size() ; ++j)
 456         {
 457           cout << j << endl;
 458           baseline[missing_names[j]].print();
 459         }
 460     }
 461
 462   if (verbose && incompatible.size())
 463     {
 464       cout << endl << incompatible.size() << " incompatible symbols " << endl;
 465       for (size_t j = 0; j < incompatible.size() ; ++j)
 466         {
 467           // First, print index.
 468           cout << j << endl;
 469
 470           // Second, report name.
 471           symbol& sbase = incompatible[j].first;
 472           symbol& stest = incompatible[j].second;
 473           stest.print();
 474
 475           // Second, report reason or reasons incompatible.
 476           check_compatible(sbase, stest, true);
 477         }
 478     }
 479
 480   cout << "\n\t\t=== libstdc++-v3 check-abi Summary ===" << endl;
 481   cout << endl;
 482   cout << "# of added symbols:\t\t " << added_names.size() << endl;
 483   cout << "# of missing symbols:\t\t " << missing_names.size() << endl;
 484   cout << "# of incompatible symbols:\t " << incompatible.size() << endl;
 485   cout << endl;
 486   cout << "using: " << baseline_file << endl;
 487
 488   return !(missing_names.size() || incompatible.size());
 489 }
 490
 491
 492 symbols
 493 create_symbols(const char* file)
 494 {
 495   symbols s;
 496   ifstream ifs(file);
 497   if (ifs.is_open())
 498     {
 499       // Organize file data into an associated container (symbols) of symbol
 500       // objects mapped to mangled names without versioning
 501       // information.
 502       const string empty;
 503       string line = empty;
 504       while (getline(ifs, line).good())
 505         {
 506           symbol tmp;
 507           tmp.init(line);
 508           s[tmp.name] = tmp;
 509           line = empty;
 510         }
 511     }
 512   else
 513     {
 514       ostringstream os;
 515       os << "create_symbols failed for file " << file;
 516       __throw_runtime_error(os.str().c_str());
 517     }
 518   return s;
 519 }
 520
 521
 522 const char*
 523 demangle(const std::string& mangled)
 524 {
 525   const char* name;
 526   if (mangled[0] != '_' || mangled[1] != 'Z')
 527     {
 528       // This is not a mangled symbol, thus has "C" linkage.
 529       name = mangled.c_str();
 530     }
 531   else
 532     {
 533       // Use __cxa_demangle to demangle.
 534       int status = 0;
 535       name = abi::__cxa_demangle(mangled.c_str(), 0, 0, &status);
 536       if (!name)
 537         {
 538           switch (status)
 539             {
 540             case 0:
 541               name = "error code = 0: success";
 542               break;
 543             case -1:
 544               name = "error code = -1: memory allocation failure";
 545               break;
 546             case -2:
 547               name = "error code = -2: invalid mangled name";
 548               break;
 549             case -3:
 550               name = "error code = -3: invalid arguments";
 551               break;
 552             default:
 553               name = "error code unknown - who knows what happened";
 554             }
 555         }
 556     }
 557   return name;
 558 }
 559