toolchain/gcc/libstdc++-v3/testsuite/testsuite_hooks.h

   1 // -*- C++ -*-
   2 // Utility subroutines for the C++ library testsuite.
   3 //
   4 // Copyright (C) 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 2, or (at your option)
  10 // any later version.
  11 //
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16 //
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING.  If not, write to the Free
  19 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  20 // USA.
  21 //
  22 // As a special exception, you may use this file as part of a free software
  23 // library without restriction.  Specifically, if other files instantiate
  24 // templates or use macros or inline functions from this file, or you compile
  25 // this file and link it with other files to produce an executable, this
  26 // file does not by itself cause the resulting executable to be covered by
  27 // the GNU General Public License.  This exception does not however
  28 // invalidate any other reasons why the executable file might be covered by
  29 // the GNU General Public License.
  30
  31 // This file provides the following:
  32 //
  33 // 1)  VERIFY(), via _GLIBCXX_ASSERT, from Brent Verner <brent@rcfile.org>.
  34 //   This file is included in the various testsuite programs to provide
  35 //   #define(able) assert() behavior for debugging/testing. It may be
  36 //   a suitable location for other furry woodland creatures as well.
  37 //
  38 // 2)  set_memory_limits()
  39 //   set_memory_limits() uses setrlimit() to restrict dynamic memory
  40 //   allocation.  We provide a default memory limit if none is passed by the
  41 //   calling application.  The argument to set_memory_limits() is the
  42 //   limit in megabytes (a floating-point number).  If _GLIBCXX_RES_LIMITS is
  43 //   not #defined before including this header, then no limiting is attempted.
  44 //
  45 // 3)  counter
  46 //   This is a POD with a static data member, gnu_counting_struct::count,
  47 //   which starts at zero, increments on instance construction, and decrements
  48 //   on instance destruction.  "assert_count(n)" can be called to VERIFY()
  49 //   that the count equals N.
  50 //
  51 // 4)  copy_tracker, from Stephen M. Webb <stephen@bregmasoft.com>.
  52 //   A class with nontrivial ctor/dtor that provides the ability to track the
  53 //   number of copy ctors and dtors, and will throw on demand during copy.
  54 //
  55 // 5) pod_char, pod_int, , abstract character classes and
  56 //   char_traits specializations for testing instantiations.
  57
  58 #ifndef _GLIBCXX_TESTSUITE_HOOKS_H
  59 #define _GLIBCXX_TESTSUITE_HOOKS_H
  60
  61 #include <bits/c++config.h>
  62 #include <bits/functexcept.h>
  63 #include <cstddef>
  64 #include <locale>
  65 #include <ext/pod_char_traits.h>
  66 #ifdef _GLIBCXX_HAVE_SYS_STAT_H
  67 #include <sys/stat.h>
  68 #endif
  69
  70 #ifdef _GLIBCXX_ASSERT
  71 # include <cassert>
  72 # define VERIFY(fn) assert(fn)
  73 #else
  74 # define VERIFY(fn) test &= (fn)
  75 #endif
  76
  77 #ifdef _GLIBCXX_HAVE_UNISTD_H
  78 # include <unistd.h>
  79 #else
  80 # define unlink(x)
  81 #endif
  82
  83 namespace __gnu_test
  84 {
  85   // All macros are defined in GLIBCXX_CONFIGURE_TESTSUITE and imported
  86   // from c++config.h
  87
  88   // Set memory limits if possible, if not set to 0.
  89 #ifndef _GLIBCXX_RES_LIMITS
  90 #  define MEMLIMIT_MB 0
  91 #else
  92 # ifndef MEMLIMIT_MB
  93 #  define MEMLIMIT_MB 16.0
  94 # endif
  95 #endif
  96   extern void
  97   set_memory_limits(float __size = MEMLIMIT_MB);
  98
  99   extern void
 100   set_file_limit(unsigned long __size);
 101
 102   // Check mangled name demangles (using __cxa_demangle) as expected.
 103   void
 104   verify_demangle(const char* mangled, const char* wanted);
 105
 106   // Simple callback structure for variable numbers of tests (all with
 107   // same signature).  Assume all unit tests are of the signature
 108   // void test01();
 109   class func_callback
 110   {
 111   public:
 112     typedef void (*test_type) (void);
 113
 114   private:
 115     int         _M_size;
 116     test_type   _M_tests[15];
 117
 118     func_callback&
 119     operator=(const func_callback&);
 120
 121     func_callback(const func_callback&);
 122
 123   public:
 124     func_callback(): _M_size(0) { };
 125
 126     int
 127     size() const { return _M_size; }
 128
 129     const test_type*
 130     tests() const { return _M_tests; }
 131
 132     void
 133     push_back(test_type test)
 134     {
 135       _M_tests[_M_size] = test;
 136       ++_M_size;
 137     }
 138   };
 139
 140
 141   // Run select unit tests after setting global locale.
 142   void
 143   run_tests_wrapped_locale(const char*, const func_callback&);
 144
 145   // Run select unit tests after setting environment variables.
 146   void
 147   run_tests_wrapped_env(const char*, const char*, const func_callback&);
 148
 149   // Try to create a locale with the given name. If it fails, bail.
 150   std::locale
 151   try_named_locale(const char* name);
 152
 153   int
 154   try_mkfifo (const char* filename, mode_t mode);
 155
 156   // Test data types.
 157   struct pod_char
 158   {
 159     unsigned char c;
 160   };
 161
 162   inline bool
 163   operator==(const pod_char& lhs, const pod_char& rhs)
 164   { return lhs.c == rhs.c; }
 165
 166   struct pod_int
 167   {
 168     int i;
 169   };
 170
 171   struct state
 172   {
 173     unsigned long l;
 174     unsigned long l2;
 175   };
 176
 177   typedef unsigned short                                value_type;
 178   typedef unsigned int                                  int_type;
 179   typedef __gnu_cxx::character<value_type, int_type>    pod_type;
 180
 181
 182   // Counting.
 183   struct counter
 184   {
 185     // Specifically and glaringly-obviously marked 'signed' so that when
 186     // COUNT mistakenly goes negative, we can track the patterns of
 187     // deletions more easily.
 188     typedef  signed int     size_type;
 189     static size_type   count;
 190     counter() { ++count; }
 191     counter (const counter&) { ++count; }
 192     ~counter() { --count; }
 193   };
 194
 195 #define assert_count(n)   VERIFY(__gnu_test::counter::count == n)
 196
 197   // A (static) class for counting copy constructors and possibly throwing an
 198   // exception on a desired count.
 199   class copy_constructor
 200   {
 201   public:
 202     static unsigned int
 203     count() { return count_; }
 204
 205     static void
 206     mark_call()
 207     {
 208       count_++;
 209       if (count_ == throw_on_)
 210         __throw_exception_again "copy constructor exception";
 211     }
 212
 213     static void
 214     reset()
 215     {
 216       count_ = 0;
 217       throw_on_ = 0;
 218     }
 219
 220     static void
 221     throw_on(unsigned int count) { throw_on_ = count; }
 222
 223   private:
 224     static unsigned int count_;
 225     static unsigned int throw_on_;
 226   };
 227
 228   // A (static) class for counting assignment operator calls and
 229   // possibly throwing an exception on a desired count.
 230   class assignment_operator
 231   {
 232   public:
 233     static unsigned int
 234     count() { return count_; }
 235
 236     static void
 237     mark_call()
 238     {
 239       count_++;
 240       if (count_ == throw_on_)
 241         __throw_exception_again "assignment operator exception";
 242     }
 243
 244     static void
 245     reset()
 246     {
 247       count_ = 0;
 248       throw_on_ = 0;
 249     }
 250
 251     static void
 252     throw_on(unsigned int count) { throw_on_ = count; }
 253
 254   private:
 255     static unsigned int count_;
 256     static unsigned int throw_on_;
 257   };
 258
 259   // A (static) class for tracking calls to an object's destructor.
 260   class destructor
 261   {
 262   public:
 263     static unsigned int
 264     count() { return _M_count; }
 265
 266     static void
 267     mark_call() { _M_count++; }
 268
 269     static void
 270     reset() { _M_count = 0; }
 271
 272   private:
 273     static unsigned int _M_count;
 274   };
 275
 276   // An class of objects that can be used for validating various
 277   // behaviours and guarantees of containers and algorithms defined in
 278   // the standard library.
 279   class copy_tracker
 280   {
 281   public:
 282     // Creates a copy-tracking object with the given ID number.  If
 283     // "throw_on_copy" is set, an exception will be thrown if an
 284     // attempt is made to copy this object.
 285     copy_tracker(int id = next_id_--, bool throw_on_copy = false)
 286     : id_(id) , throw_on_copy_(throw_on_copy) { }
 287
 288     // Copy-constructs the object, marking a call to the copy
 289     // constructor and forcing an exception if indicated.
 290     copy_tracker(const copy_tracker& rhs)
 291     : id_(rhs.id()), throw_on_copy_(rhs.throw_on_copy_)
 292     {
 293       if (throw_on_copy_)
 294         copy_constructor::throw_on(copy_constructor::count() + 1);
 295       copy_constructor::mark_call();
 296     }
 297
 298     // Assigns the value of another object to this one, tracking the
 299     // number of times this member function has been called and if the
 300     // other object is supposed to throw an exception when it is
 301     // copied, well, make it so.
 302     copy_tracker&
 303     operator=(const copy_tracker& rhs)
 304     {
 305       id_ = rhs.id();
 306       if (rhs.throw_on_copy_)
 307         assignment_operator::throw_on(assignment_operator::count() + 1);
 308       assignment_operator::mark_call();
 309       return *this;
 310     }
 311
 312     ~copy_tracker()
 313     { destructor::mark_call(); }
 314
 315     int
 316     id() const { return id_; }
 317
 318   private:
 319     int   id_;
 320     const bool  throw_on_copy_;
 321
 322   public:
 323     static void
 324     reset()
 325     {
 326       copy_constructor::reset();
 327       assignment_operator::reset();
 328       destructor::reset();
 329     }
 330
 331     // for backwards-compatibility
 332     static int
 333     copyCount()
 334     { return copy_constructor::count(); }
 335
 336     // for backwards-compatibility
 337     static int
 338     dtorCount()
 339     { return destructor::count(); }
 340
 341   private:
 342     static int next_id_;
 343   };
 344
 345   inline bool
 346   operator==(const copy_tracker& lhs, const copy_tracker& rhs)
 347   { return lhs.id() == rhs.id(); }
 348
 349   // Class for checking required type conversions, implicit and
 350   // explicit for given library data structures.
 351   template<typename _Container>
 352     struct conversion
 353     {
 354       typedef typename _Container::const_iterator const_iterator;
 355
 356       // Implicit conversion iterator to const_iterator.
 357       static const_iterator
 358       iterator_to_const_iterator()
 359       {
 360         _Container v;
 361         const_iterator it = v.begin();
 362         const_iterator end = v.end();
 363         return it == end ? v.end() : it;
 364       }
 365     };
 366 } // namespace __gnu_test
 367
 368 namespace std
 369 {
 370   template<class _CharT>
 371     struct char_traits;
 372
 373   // char_traits specialization
 374   template<>
 375     struct char_traits<__gnu_test::pod_char>
 376     {
 377       typedef __gnu_test::pod_char      char_type;
 378       typedef __gnu_test::pod_int       int_type;
 379       typedef __gnu_test::state         state_type;
 380       typedef fpos<state_type>          pos_type;
 381       typedef streamoff                 off_type;
 382
 383       static void
 384       assign(char_type& c1, const char_type& c2)
 385       { c1.c = c2.c; }
 386
 387       static bool
 388       eq(const char_type& c1, const char_type& c2)
 389       { return c1.c == c2.c; }
 390
 391       static bool
 392       lt(const char_type& c1, const char_type& c2)
 393       { return c1.c < c2.c; }
 394
 395       static int
 396       compare(const char_type* s1, const char_type* s2, size_t n)
 397       { return memcmp(s1, s2, n); }
 398
 399       static size_t
 400       length(const char_type* s)
 401       { return strlen(reinterpret_cast<const char*>(s)); }
 402
 403       static const char_type*
 404       find(const char_type* s, size_t n, const char_type& a)
 405       { return static_cast<const char_type*>(memchr(s, a.c, n)); }
 406
 407       static char_type*
 408       move(char_type* s1, const char_type* s2, size_t n)
 409       {
 410         memmove(s1, s2, n);
 411         return s1;
 412       }
 413
 414       static char_type*
 415       copy(char_type* s1, const char_type* s2, size_t n)
 416       {
 417         memcpy(s1, s2, n);
 418         return s1;
 419       }
 420
 421       static char_type*
 422       assign(char_type* s, size_t n, char_type a)
 423       {
 424         memset(s, a.c, n);
 425         return s;
 426       }
 427
 428       static char_type
 429       to_char_type(const int_type& c)
 430       {
 431         char_type ret;
 432         ret.c = static_cast<unsigned char>(c.i);
 433         return ret;
 434       }
 435
 436       static int_type
 437       to_int_type(const char_type& c)
 438       {
 439         int_type ret;
 440         ret.i = c.c;
 441         return ret;
 442       }
 443
 444       static bool
 445       eq_int_type(const int_type& c1, const int_type& c2)
 446       { return c1.i == c2.i; }
 447
 448       static int_type
 449       eof()
 450       {
 451         int_type n;
 452         n.i = -10;
 453         return n;
 454       }
 455
 456       static int_type
 457       not_eof(const int_type& c)
 458       {
 459         if (eq_int_type(c, eof()))
 460           return int_type();
 461         return c;
 462       }
 463     };
 464 } // namespace std
 465
 466 #endif // _GLIBCXX_TESTSUITE_HOOKS_H
 467