libstdc++-v3/testsuite/testsuite_hooks.h

   1 // -*- C++ -*-
   2 // Utility subroutines for the C++ library testsuite.
   3 //
   4 // Copyright (C) 2000, 2001, 2002, 2003 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 DEBUG_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_MEM_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 #ifdef DEBUG_ASSERT
  65 # include <cassert>
  66 # define VERIFY(fn) assert(fn)
  67 #else
  68 # define VERIFY(fn) test &= (fn)
  69 #endif
  70 #include <list>
  71 #include <locale>
  72 #ifdef _GLIBCXX_HAVE_UNISTD_H
  73 # include <unistd.h>
  74 #else
  75 # define unlink(x)
  76 #endif
  77
  78 namespace __gnu_test
  79 {
  80   // All macros are defined in GLIBCXX_CONFIGURE_TESTSUITE and imported
  81   // from c++config.h
  82
  83   // Set memory limits if possible, if not set to 0.
  84 #ifndef _GLIBCXX_MEM_LIMITS
  85 #  define MEMLIMIT_MB 0
  86 #else
  87 # ifndef MEMLIMIT_MB
  88 #  define MEMLIMIT_MB 16.0
  89 # endif
  90 #endif
  91   extern void
  92   set_memory_limits(float __size = MEMLIMIT_MB);
  93
  94
  95   // Check mangled name demangles (using __cxa_demangle) as expected.
  96   void
  97   verify_demangle(const char* mangled, const char* wanted);
  98
  99
 100   // Simple callback structure for variable numbers of tests (all with
 101   // same signature).  Assume all unit tests are of the signature
 102   // void test01();
 103   typedef void (*test_func) (void);
 104   typedef std::list<test_func> func_callback;
 105
 106   // Run select unit tests after setting global locale.
 107   void
 108   run_tests_wrapped_locale(const char*, const func_callback&);
 109
 110   // Run select unit tests after setting environment variables.
 111   void
 112   run_tests_wrapped_env(const char*, const char*, const func_callback&);
 113
 114   // Try to create a locale with the given name. If it fails, bail.
 115   std::locale
 116   try_named_locale(const char* name);
 117
 118
 119   // Test data types.
 120   struct pod_char
 121   {
 122     unsigned char c;
 123   };
 124
 125   struct pod_int
 126   {
 127     int i;
 128   };
 129
 130   struct state
 131   {
 132     unsigned long l;
 133     unsigned long l2;
 134   };
 135
 136
 137   // Counting.
 138   struct counter
 139   {
 140     // Specifically and glaringly-obviously marked 'signed' so that when
 141     // COUNT mistakenly goes negative, we can track the patterns of
 142     // deletions more easily.
 143     typedef  signed int     size_type;
 144     static size_type   count;
 145     counter() { ++count; }
 146     counter (const counter&) { ++count; }
 147     ~counter() { --count; }
 148   };
 149
 150 #define assert_count(n)   VERIFY(__gnu_test::counter::count == n)
 151
 152   // A (static) class for counting copy constructors and possibly throwing an
 153   // exception on a desired count.
 154   class copy_constructor
 155   {
 156   public:
 157     static unsigned int
 158     count() { return count_; }
 159
 160     static void
 161     mark_call()
 162     {
 163       count_++;
 164       if (count_ == throw_on_)
 165         __throw_exception_again "copy constructor exception";
 166     }
 167
 168     static void
 169     reset()
 170     {
 171       count_ = 0;
 172       throw_on_ = 0;
 173     }
 174
 175     static void
 176     throw_on(unsigned int count) { throw_on_ = count; }
 177
 178   private:
 179     static unsigned int count_;
 180     static unsigned int throw_on_;
 181   };
 182
 183   // A (static) class for counting assignment operator calls and
 184   // possibly throwing an exception on a desired count.
 185   class assignment_operator
 186   {
 187   public:
 188     static unsigned int
 189     count() { return count_; }
 190
 191     static void
 192     mark_call()
 193     {
 194       count_++;
 195       if (count_ == throw_on_)
 196         __throw_exception_again "assignment operator exception";
 197     }
 198
 199     static void
 200     reset()
 201     {
 202       count_ = 0;
 203       throw_on_ = 0;
 204     }
 205
 206     static void
 207     throw_on(unsigned int count) { throw_on_ = count; }
 208
 209   private:
 210     static unsigned int count_;
 211     static unsigned int throw_on_;
 212   };
 213
 214   // A (static) class for tracking calls to an object's destructor.
 215   class destructor
 216   {
 217   public:
 218     static unsigned int
 219     count() { return _M_count; }
 220
 221     static void
 222     mark_call() { _M_count++; }
 223
 224     static void
 225     reset() { _M_count = 0; }
 226
 227   private:
 228     static unsigned int _M_count;
 229   };
 230
 231   // An class of objects that can be used for validating various
 232   // behaviours and guarantees of containers and algorithms defined in
 233   // the standard library.
 234   class copy_tracker
 235   {
 236   public:
 237     // Creates a copy-tracking object with the given ID number.  If
 238     // "throw_on_copy" is set, an exception will be thrown if an
 239     // attempt is made to copy this object.
 240     copy_tracker(int id = next_id_--, bool throw_on_copy = false)
 241     : id_(id) , throw_on_copy_(throw_on_copy) { }
 242
 243     // Copy-constructs the object, marking a call to the copy
 244     // constructor and forcing an exception if indicated.
 245     copy_tracker(const copy_tracker& rhs)
 246     : id_(rhs.id()), throw_on_copy_(rhs.throw_on_copy_)
 247     {
 248       if (throw_on_copy_)
 249         copy_constructor::throw_on(copy_constructor::count() + 1);
 250       copy_constructor::mark_call();
 251     }
 252
 253     // Assigns the value of another object to this one, tracking the
 254     // number of times this member function has been called and if the
 255     // other object is supposed to throw an exception when it is
 256     // copied, well, make it so.
 257     copy_tracker&
 258     operator=(const copy_tracker& rhs)
 259     {
 260       id_ = rhs.id();
 261       if (rhs.throw_on_copy_)
 262         assignment_operator::throw_on(assignment_operator::count() + 1);
 263       assignment_operator::mark_call();
 264       return *this;
 265     }
 266
 267     ~copy_tracker()
 268     { destructor::mark_call(); }
 269
 270     int
 271     id() const { return id_; }
 272
 273   private:
 274     int   id_;
 275     const bool  throw_on_copy_;
 276
 277   public:
 278     static void
 279     reset()
 280     {
 281       copy_constructor::reset();
 282       assignment_operator::reset();
 283       destructor::reset();
 284     }
 285
 286     // for backwards-compatibility
 287     static int
 288     copyCount()
 289     { return copy_constructor::count(); }
 290
 291     // for backwards-compatibility
 292     static int
 293     dtorCount()
 294     { return destructor::count(); }
 295
 296   private:
 297     static int next_id_;
 298   };
 299
 300   inline bool
 301   operator==(const copy_tracker& lhs, const copy_tracker& rhs)
 302   { return lhs.id() == rhs.id(); }
 303 } // namespace __gnu_test
 304
 305 namespace std
 306 {
 307   template<class _CharT>
 308     struct char_traits;
 309
 310   // char_traits specialization
 311   template<>
 312     struct char_traits<__gnu_test::pod_char>
 313     {
 314       typedef __gnu_test::pod_char      char_type;
 315       typedef __gnu_test::pod_int       int_type;
 316       typedef long                      pos_type;
 317       typedef unsigned long             off_type;
 318       typedef __gnu_test::state         state_type;
 319
 320       static void
 321       assign(char_type& __c1, const char_type& __c2);
 322
 323       static bool
 324       eq(const char_type& __c1, const char_type& __c2);
 325
 326       static bool
 327       lt(const char_type& __c1, const char_type& __c2);
 328
 329       static int
 330       compare(const char_type* __s1, const char_type* __s2, size_t __n);
 331
 332       static size_t
 333       length(const char_type* __s);
 334
 335       static const char_type*
 336       find(const char_type* __s, size_t __n, const char_type& __a);
 337
 338       static char_type*
 339       move(char_type* __s1, const char_type* __s2, size_t __n);
 340
 341       static char_type*
 342       copy(char_type* __s1, const char_type* __s2, size_t __n);
 343
 344       static char_type*
 345       assign(char_type* __s, size_t __n, char_type __a);
 346
 347       static char_type
 348       to_char_type(const int_type& __c);
 349
 350       static int_type
 351       to_int_type(const char_type& __c);
 352
 353       static bool
 354       eq_int_type(const int_type& __c1, const int_type& __c2);
 355
 356       static int_type
 357       eof();
 358
 359       static int_type
 360       not_eof(const int_type& __c);
 361     };
 362 } // namespace std
 363
 364 #endif // _GLIBCXX_TESTSUITE_HOOKS_H
 365