CODEWITHSUNDEEP
c++11exprtk
Sujit chourasia
Sujit chourasia

Reputation: 11

Crashes after parsing the equation

The application want to parse a string equation to mathematics and return the data to user. for this purpose the library is used is exprtk

for easy analysis I have shared minimum working code minimum working code

when application parses the string to code back to back [multithreaded but locked]

void reset()
{
      // Why? because msvc doesn't support swap properly.
      //stack_ = std::stack<std::pair<char,std::size_t> >();
      /**
      it was crashing on destructor on ~deque()
      stating memory reallocation
      so I change it to pop so for now this has been resolved
      */
      while(stack_.size()) stack_.pop();
      state_ = true;
      error_token_.clear();
}

now the code always crashes on 

static inline void destroy(control_block*& cntrl_blck)
{
   if (cntrl_blck)
    {
        /**now crashes on this condition check*/
        if ( (0 !=   cntrl_blck->ref_count) &&  (0 == --cntrl_blck->ref_count) )
        {
           delete cntrl_blck;
        }

          cntrl_blck = 0;
     }
  }

UPDATE pastebin code updated new code with main has been added with main and minimum working code. all the shared_ptr has been removed. now they are normal objects. as for exprtk reset function has been changed to original one

void reset()
{
     // Why? because msvc doesn't support swap properly.
     stack_ = std::stack<std::pair<char,std::size_t> >();
     state_ = true;
     error_token_.clear();
}

and backtrace of gdb has been added backtrace

Upvotes: 1

Views: 133

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