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CC: does not list "allocate", a member function of std::allocator.

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ollydbg:

--- Quote from: edison on September 04, 2014, 04:06:14 pm ---
--- Code: ---#include <memory>

int main()
{
    std::allocator<int> a1; // default allocator for ints
    // int * a = a1.allocate(10); // space for 10 ints

    int * a = a1. //<--- here is the bug happened.

    return 0;
}

--- End code ---

--- End quote ---

OK, I see the reason. (tested under MinGW 4.7.x compiler)

1, I see that std::allocator class is correctly located in
mingw-builds\473\mingw32\lib\gcc\i686-w64-mingw32\4.7.3\include\c++\bits\allocator.h around line 84

--- Code: ---  /**
   * @brief  The @a standard allocator, as per [20.4].
   *
   *  See http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt04ch11.html
   *  for further details.
   */
  template<typename _Tp>
    class allocator: public __glibcxx_base_allocator<_Tp>
    {
   public:
      typedef size_t     size_type;
      typedef ptrdiff_t  difference_type;
      typedef _Tp*       pointer;
      typedef const _Tp* const_pointer;
      typedef _Tp&       reference;
      typedef const _Tp& const_reference;
      typedef _Tp        value_type;

      template<typename _Tp1>
        struct rebind
        { typedef allocator<_Tp1> other; };

      allocator() throw() { }

      allocator(const allocator& __a) throw()
      : __glibcxx_base_allocator<_Tp>(__a) { }

      template<typename _Tp1>
        allocator(const allocator<_Tp1>&) throw() { }

      ~allocator() throw() { }

      // Inherit everything else.
    };


--- End code ---

Look, there is not member named "allocate", so it should be in its base class. But when I hover the "__glibcxx_base_allocator", I can't see the declaration...

In mingw-builds\473\mingw32\lib\gcc\i686-w64-mingw32\4.7.3\include\c++\i686-w64-mingw32\bits\c++allocator.h
I see

--- Code: ---#ifndef _GLIBCXX_CXX_ALLOCATOR_H
#define _GLIBCXX_CXX_ALLOCATOR_H 1

// Define new_allocator as the base class to std::allocator.
#include <ext/new_allocator.h>
#define __glibcxx_base_allocator  __gnu_cxx::new_allocator

#endif

--- End code ---

and in mingw-builds\473\mingw32\lib\gcc\i686-w64-mingw32\4.7.3\include\c++\ext\new_allocator.h
I see

--- Code: ---  template<typename _Tp>
    class new_allocator
    {
    public:
      typedef size_t     size_type;
      typedef ptrdiff_t  difference_type;
      typedef _Tp*       pointer;
      typedef const _Tp* const_pointer;
      typedef _Tp&       reference;
      typedef const _Tp& const_reference;
      typedef _Tp        value_type;

      template<typename _Tp1>
        struct rebind
        { typedef new_allocator<_Tp1> other; };

      new_allocator() _GLIBCXX_USE_NOEXCEPT { }

      new_allocator(const new_allocator&) _GLIBCXX_USE_NOEXCEPT { }

      template<typename _Tp1>
        new_allocator(const new_allocator<_Tp1>&) _GLIBCXX_USE_NOEXCEPT { }

      ~new_allocator() _GLIBCXX_USE_NOEXCEPT { }

      pointer
      address(reference __x) const _GLIBCXX_NOEXCEPT
      { return std::__addressof(__x); }

      const_pointer
      address(const_reference __x) const _GLIBCXX_NOEXCEPT
      { return std::__addressof(__x); }

      // NB: __n is permitted to be 0.  The C++ standard says nothing
      // about what the return value is when __n == 0.
      pointer
      allocate(size_type __n, const void* = 0)
      {
if (__n > this->max_size())
  std::__throw_bad_alloc();

return static_cast<_Tp*>(::operator new(__n * sizeof(_Tp)));
      }

--- End code ---

See the last function, it is there.

But I'm still not sure how to fix this bug in our CC's code.

ollydbg:
Oh, it looks like it works OK here, see the screen shot.



I just close and reopen the project.

edison:
I am using mingw-w64 4.2 i686 dw2 (gcc 4.9.1) and codeblocks svn 9904, close then re-open project does not help here.
I will try the CB 13.12 w/tdm-gcc 4.7.1 latter.

ollydbg:

--- Quote from: edison on September 04, 2014, 04:50:31 pm ---I am using mingw-w64 4.2 i686 dw2 (gcc 4.9.1) and codeblocks svn 9904, close then re-open project does not help here.
I will try the CB 13.12 w/tdm-gcc 4.7.1 latter.

--- End quote ---
My testing environment is latest C::B trunk and mingw-build 4.7.3.

Jenna:
Works out of the box with C::B 9884 and "g++ (GCC) 4.8.3 20140624 (Red Hat 4.8.3-1)" 64Bit on Fedora 20.

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