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

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
   4
   5 // This library is free software; you can redistribute it and/or
   6 // modify it under the terms of the GNU General Public License as
   7 // published by the Free Software Foundation; either version 2, or (at
   8 // your option) any later version.
   9
  10 // This library is distributed in the hope that it will be useful, but
  11 // WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 // General Public License for more details.
  14
  15 // You should have received a copy of the GNU General Public License
  16 // along with this library; see the file COPYING.  If not, write to
  17 // the Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
  18 // MA 02110-1301, USA.
  19
  20 // As a special exception, you may use this file as part of a free
  21 // software library without restriction.  Specifically, if other files
  22 // instantiate templates or use macros or inline functions from this
  23 // file, or you compile this file and link it with other files to
  24 // produce an executable, this file does not by itself cause the
  25 // resulting executable to be covered by the GNU General Public
  26 // License.  This exception does not however invalidate any other
  27 // reasons why the executable file might be covered by the GNU General
  28 // Public License.
  29
  30 // Benjamin Kosnik  <bkoz@redhat.com>
  31
  32 #include "testsuite_abi.h"
  33 #include <sstream>
  34 #include <fstream>
  35 #include <iostream>
  36
  37 using namespace std;
  38
  39 void
  40 symbol::init(string& data)
  41 {
  42   const char delim = ':';
  43   const char version_delim = '@';
  44   const string::size_type npos = string::npos;
  45   string::size_type n = 0;
  46
  47   // Set the type.
  48   if (data.find("FUNC") == 0)
  49     type = symbol::function;
  50   else if (data.find("OBJECT") == 0)
  51     type = symbol::object;
  52
  53   n = data.find_first_of(delim);
  54   if (n != npos)
  55     data.erase(data.begin(), data.begin() + n + 1);
  56
  57   // Iff object, get size info.
  58   if (type == symbol::object)
  59     {
  60       n = data.find_first_of(delim);
  61       if (n != npos)
  62         {
  63           string size(data.begin(), data.begin() + n);
  64           istringstream iss(size);
  65           int x;
  66           iss >> x;
  67           if (!iss.fail())
  68             size = x;
  69           data.erase(data.begin(), data.begin() + n + 1);
  70         }
  71     }
  72
  73   // Set the name and raw_name.
  74   raw_name = string(data.begin(), data.end());
  75   n = data.find_first_of(version_delim);
  76   if (n != npos)
  77     {
  78       // Found version string.
  79       name = string(data.begin(), data.begin() + n);
  80       n = data.find_last_of(version_delim);
  81       data.erase(data.begin(), data.begin() + n + 1);
  82
  83       // Set version name.
  84       version_name = data;
  85     }
  86   else
  87     {
  88       // No versioning info.
  89       name = string(data.begin(), data.end());
  90       version_status = symbol::none;
  91     }
  92
  93   // Set the demangled name.
  94   demangled_name = demangle(name);
  95 }
  96
  97 void
  98 symbol::print() const
  99 {
 100   const char tab = '\t';
 101   cout << name << endl;
 102
 103   if (demangled_name != name)
 104     cout << demangled_name << endl;
 105
 106   string vers;
 107   switch (version_status)
 108     {
 109     case none:
 110       vers = "none";
 111       break;
 112     case compatible:
 113       vers = "compatible";
 114       break;
 115     case incompatible:
 116       vers = "incompatible";
 117       break;
 118      case unversioned:
 119       vers = "unversioned";
 120       break;
 121    default:
 122       vers = "<default>";
 123     }
 124   cout << "version status: " << vers << endl;
 125
 126   if (version_name.size()
 127       && (version_status == compatible || version_status == incompatible))
 128     cout << version_name << endl;
 129
 130   string type_string;
 131   switch (type)
 132     {
 133     case function:
 134       type_string = "function";
 135       break;
 136     case object:
 137       type_string = "object";
 138       break;
 139     case uncategorized:
 140       type_string = "uncategorized";
 141       break;
 142     default:
 143       type_string = "<default>";
 144     }
 145   cout << "type: " << type_string << endl;
 146
 147   if (type == object)
 148     cout << "type size: " << size << endl;
 149
 150   string status_string;
 151   switch (status)
 152     {
 153     case added:
 154       status_string = "added";
 155       break;
 156     case subtracted:
 157       status_string = "subtracted";
 158       break;
 159     case undesignated:
 160       status_string = "undesignated";
 161       break;
 162     default:
 163       status_string = "<default>";
 164     }
 165   cout << "status: " << status_string << endl;
 166
 167   cout << endl;
 168 }
 169
 170
 171 bool
 172 check_version(symbol& test, bool added)
 173 {
 174   // Construct list of compatible versions.
 175   typedef std::vector<std::string> compat_list;
 176   static compat_list known_versions;
 177   if (known_versions.empty())
 178     {
 179       // NB: First version here must be the default version for this
 180       // version of DT_SONAME.
 181       known_versions.push_back("GLIBCXX_3.4");
 182       known_versions.push_back("GLIBCXX_3.4.1");
 183       known_versions.push_back("GLIBCXX_3.4.2");
 184       known_versions.push_back("GLIBCXX_3.4.3");
 185       known_versions.push_back("GLIBCXX_3.4.4");
 186       known_versions.push_back("GLIBCXX_3.4.5");
 187       known_versions.push_back("GLIBCXX_3.4.6");
 188       known_versions.push_back("GLIBCXX_3.4.7");
 189       known_versions.push_back("GLIBCXX_3.4.8");
 190       known_versions.push_back("GLIBCXX_3.4.9");
 191       known_versions.push_back("GLIBCXX_LDBL_3.4");
 192       known_versions.push_back("GLIBCXX_LDBL_3.4.7");
 193       known_versions.push_back("CXXABI_1.3");
 194       known_versions.push_back("CXXABI_1.3.1");
 195       known_versions.push_back("CXXABI_LDBL_1.3");
 196     }
 197   compat_list::iterator begin = known_versions.begin();
 198   compat_list::iterator end = known_versions.end();
 199
 200   // Check for compatible version.
 201   if (test.version_name.size())
 202     {
 203       compat_list::iterator it1 = find(begin, end, test.version_name);
 204       compat_list::iterator it2 = find(begin, end, test.name);
 205       if (it1 != end)
 206         test.version_status = symbol::compatible;
 207       else
 208         test.version_status = symbol::incompatible;
 209
 210       // Check that added symbols aren't added in the base version.
 211       if (added && test.version_name == known_versions[0])
 212         test.version_status = symbol::incompatible;
 213
 214       // Check for weak label.
 215       if (it1 == end && it2 == end)
 216         test.version_status = symbol::incompatible;
 217
 218       // Check that
 219       // GLIBCXX_3.4
 220       // GLIBCXX_3.4.5
 221       // version as compatible
 222       // XXX
 223     }
 224   else
 225     {
 226       if (added)
 227         {
 228           // New version labels are ok. The rest are not.
 229           compat_list::iterator it2 = find(begin, end, test.name);
 230           if (it2 != end)
 231             test.version_status = symbol::compatible;
 232           else
 233             test.version_status = symbol::incompatible;
 234         }
 235     }
 236   return test.version_status == symbol::compatible;
 237 }
 238
 239 bool
 240 check_compatible(symbol& lhs, symbol& rhs, bool verbose)
 241 {
 242   bool ret = true;
 243   const char tab = '\t';
 244
 245   // Check to see if symbol_objects are compatible.
 246   if (lhs.type != rhs.type)
 247     {
 248       ret = false;
 249       if (verbose)
 250         cout << tab << "incompatible types" << endl;
 251     }
 252
 253   if (lhs.name != rhs.name)
 254     {
 255       ret = false;
 256       if (verbose)
 257         cout << tab << "incompatible names" << endl;
 258     }
 259
 260   if (lhs.size != rhs.size)
 261     {
 262       ret = false;
 263       if (verbose)
 264         {
 265           cout << tab << "incompatible sizes" << endl;
 266           cout << tab << lhs.size << endl;
 267           cout << tab << rhs.size << endl;
 268         }
 269     }
 270
 271   if (lhs.version_name != rhs.version_name
 272       && !check_version(lhs) && !check_version(rhs))
 273     {
 274       ret = false;
 275       if (verbose)
 276         {
 277           cout << tab << "incompatible versions" << endl;
 278           cout << tab << lhs.version_name << endl;
 279           cout << tab << rhs.version_name << endl;
 280         }
 281     }
 282
 283   if (verbose)
 284     cout << endl;
 285
 286   return ret;
 287 }
 288
 289
 290 bool
 291 has_symbol(const string& mangled, const symbols& s) throw()
 292 {
 293   const symbol_names& names = s.first;
 294   symbol_names::const_iterator i = find(names.begin(), names.end(), mangled);
 295   return i != names.end();
 296 }
 297
 298 symbol&
 299 get_symbol(const string& mangled, const symbols& s)
 300 {
 301   const symbol_names& names = s.first;
 302   symbol_names::const_iterator i = find(names.begin(), names.end(), mangled);
 303   if (i != names.end())
 304     {
 305       symbol_objects objects = s.second;
 306       return objects[mangled];
 307     }
 308   else
 309     {
 310       ostringstream os;
 311       os << "get_symbol failed for symbol " << mangled;
 312       __throw_logic_error(os.str().c_str());
 313     }
 314 }
 315
 316 void
 317 examine_symbol(const char* name, const char* file)
 318 {
 319   try
 320     {
 321       symbols s = create_symbols(file);
 322       symbol& sym = get_symbol(name, s);
 323       sym.print();
 324     }
 325   catch(...)
 326     { __throw_exception_again; }
 327 }
 328
 329 int
 330 compare_symbols(const char* baseline_file, const char* test_file,
 331                 bool verbose)
 332 {
 333   // Input both lists of symbols into container.
 334   symbols baseline = create_symbols(baseline_file);
 335   symbols test = create_symbols(test_file);
 336   symbol_names& baseline_names = baseline.first;
 337   symbol_objects& baseline_objects = baseline.second;
 338   symbol_names& test_names = test.first;
 339   symbol_objects& test_objects = test.second;
 340
 341   //  Sanity check results.
 342   const symbol_names::size_type baseline_size = baseline_names.size();
 343   const symbol_names::size_type test_size = test_names.size();
 344   if (!baseline_size || !test_size)
 345     {
 346       cerr << "Problems parsing the list of exported symbols." << endl;
 347       exit(2);
 348     }
 349
 350   // Sort out names.
 351   // Assuming baseline_names, test_names are both unique w/ no duplicates.
 352   //
 353   // The names added to missing_names are baseline_names not found in
 354   // test_names
 355   // -> symbols that have been deleted.
 356   //
 357   // The names added to added_names are test_names not in
 358   // baseline_names
 359   // -> symbols that have been added.
 360   symbol_names shared_names;
 361   symbol_names missing_names;
 362   symbol_names added_names = test_names;
 363   for (size_t i = 0; i < baseline_size; ++i)
 364     {
 365       string what(baseline_names[i]);
 366       symbol_names::iterator end = added_names.end();
 367       symbol_names::iterator it = find(added_names.begin(), end, what);
 368       if (it != end)
 369         {
 370           // Found.
 371           shared_names.push_back(what);
 372           added_names.erase(it);
 373         }
 374       else
 375         missing_names.push_back(what);
 376     }
 377
 378   // Check missing names for compatibility.
 379   typedef pair<symbol, symbol> symbol_pair;
 380   vector<symbol_pair> incompatible;
 381   const symbol_names::size_type missing_size = missing_names.size();
 382   for (size_t j = 0; j < missing_size; ++j)
 383     {
 384       symbol& base = baseline_objects[missing_names[j]];
 385       base.status = symbol::subtracted;
 386       incompatible.push_back(symbol_pair(base, base));
 387     }
 388
 389   // Check shared names for compatibility.
 390   const symbol_names::size_type shared_size = shared_names.size();
 391   for (size_t k = 0; k < shared_size; ++k)
 392     {
 393       symbol& base = baseline_objects[shared_names[k]];
 394       symbol& test = test_objects[shared_names[k]];
 395       test.status = symbol::existing;
 396       if (!check_compatible(base, test))
 397         incompatible.push_back(symbol_pair(base, test));
 398     }
 399
 400   // Check added names for compatibility.
 401   const symbol_names::size_type added_size = added_names.size();
 402   for (size_t l = 0; l < added_size; ++l)
 403     {
 404       symbol& test = test_objects[added_names[l]];
 405       test.status = symbol::added;
 406       if (!check_version(test, true))
 407         incompatible.push_back(symbol_pair(test, test));
 408     }
 409
 410   // Report results.
 411   if (verbose && added_names.size())
 412     {
 413       cout << endl << added_names.size() << " added symbols " << endl;
 414       for (size_t j = 0; j < added_names.size() ; ++j)
 415         {
 416           cout << j << endl;
 417           test_objects[added_names[j]].print();
 418         }
 419     }
 420
 421   if (verbose && missing_names.size())
 422     {
 423       cout << endl << missing_names.size() << " missing symbols " << endl;
 424       for (size_t j = 0; j < missing_names.size() ; ++j)
 425         {
 426           cout << j << endl;
 427           baseline_objects[missing_names[j]].print();
 428         }
 429     }
 430
 431   if (verbose && incompatible.size())
 432     {
 433       cout << endl << incompatible.size() << " incompatible symbols " << endl;
 434       for (size_t j = 0; j < incompatible.size() ; ++j)
 435         {
 436           // First, print index.
 437           cout << j << endl;
 438
 439           // Second, report name.
 440           symbol& base = incompatible[j].first;
 441           symbol& test = incompatible[j].second;
 442           test.print();
 443
 444           // Second, report reason or reasons incompatible.
 445           check_compatible(base, test, true);
 446         }
 447     }
 448
 449   cout << "\n\t\t=== libstdc++-v3 check-abi Summary ===" << endl;
 450   cout << endl;
 451   cout << "# of added symbols:\t\t " << added_names.size() << endl;
 452   cout << "# of missing symbols:\t\t " << missing_names.size() << endl;
 453   cout << "# of incompatible symbols:\t " << incompatible.size() << endl;
 454   cout << endl;
 455   cout << "using: " << baseline_file << endl;
 456
 457   return !(missing_names.size() || incompatible.size());
 458 }
 459
 460
 461 symbols
 462 create_symbols(const char* file)
 463 {
 464   symbols s;
 465   ifstream ifs(file);
 466   if (ifs.is_open())
 467     {
 468       // Organize file data into container of symbol objects, and a
 469       // container of mangled names without versioning information.
 470       symbol_names& names = s.first;
 471       symbol_objects& objects = s.second;
 472       const string empty;
 473       string line = empty;
 474       while (getline(ifs, line).good())
 475         {
 476           symbol tmp;
 477           tmp.init(line);
 478           objects[tmp.name] = tmp;
 479           names.push_back(tmp.name);
 480           line = empty;
 481         }
 482     }
 483   else
 484     {
 485       ostringstream os;
 486       os << "create_symbols failed for file " << file;
 487       __throw_runtime_error(os.str().c_str());
 488     }
 489   return s;
 490 }
 491
 492
 493 const char*
 494 demangle(const std::string& mangled)
 495 {
 496   const char* name;
 497   if (mangled[0] != '_' || mangled[1] != 'Z')
 498     {
 499       // This is not a mangled symbol, thus has "C" linkage.
 500       name = mangled.c_str();
 501     }
 502   else
 503     {
 504       // Use __cxa_demangle to demangle.
 505       int status = 0;
 506       name = abi::__cxa_demangle(mangled.c_str(), 0, 0, &status);
 507       if (!name)
 508         {
 509           switch (status)
 510             {
 511             case 0:
 512               name = "error code = 0: success";
 513               break;
 514             case -1:
 515               name = "error code = -1: memory allocation failure";
 516               break;
 517             case -2:
 518               name = "error code = -2: invalid mangled name";
 519               break;
 520             case -3:
 521               name = "error code = -3: invalid arguments";
 522               break;
 523             default:
 524               name = "error code unknown - who knows what happened";
 525             }
 526         }
 527     }
 528   return name;
 529 }
 530