kc3-lang/SDL/visualtest/src/variator_exhaustive.c

Branch : - branch - v2.28 - tag -

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  Commit

• Author : Philipp Wiesemann
  Date : 2015-06-21 17:33:46
  Hash : 0e45984f
  Message : Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().

• visualtest/src/variator_exhaustive.c

• /* See COPYING.txt for the full license governing this code. */
  /**
   * \file variator_exhaustive.c
   *
   * Source file for the variator that tests the SUT with all the different
   * variations of input parameters that are valid.
   */
  
  #include <time.h>
  #include <SDL_test.h>
  #include "SDL_visualtest_sut_configparser.h"
  #include "SDL_visualtest_exhaustive_variator.h"
  
  static int
  NextVariation(SDLVisualTest_Variation* variation,
                SDLVisualTest_SUTConfig* config)
  {
      int i, carry;
      if(!variation)
      {
          SDLTest_LogError("variation argument cannot be NULL");
          return -1;
      }
      if(!config)
      {
          SDLTest_LogError("config argument cannot be NULL");
          return -1;
      }
  
      carry = 1;
      for(i = 0; i < variation->num_vars; i++)
      {
          carry = SDLVisualTest_NextValue(&variation->vars[i], &config->options[i]);
          if(carry != 1)
              break;
      }
  
      if(carry == 1) /* we're done, we've tried all possible variations */
          return 0;
      if(carry == 0)
          return 1;
      SDLTest_LogError("NextVariation() failed");
      return -1;
  }
  
  int
  SDLVisualTest_InitExhaustiveVariator(SDLVisualTest_ExhaustiveVariator* variator,
                                       SDLVisualTest_SUTConfig* config)
  {
      if(!variator)
      {
          SDLTest_LogError("variator argument cannot be NULL");
          return 0;
      }
      if(!config)
      {
          SDLTest_LogError("config argument cannot be NULL");
          return 0;
      }
  
      SDLTest_FuzzerInit(time(NULL));
  
      variator->config = *config;
      variator->variation.num_vars = 0;
      variator->variation.vars = NULL;
  
      return 1;
  }
  
  /* TODO: Right now variations where an option is not specified at all are not
     tested for. This can be implemented by switching the on attribute for integer,
     enum and string options to true and false. */
  char*
  SDLVisualTest_GetNextExhaustiveVariation(SDLVisualTest_ExhaustiveVariator* variator)
  {
      int success;
      if(!variator)
      {
          SDLTest_LogError("variator argument cannot be NULL");
          return NULL;
      }
  
      if(!variator->variation.vars) /* the first time this function is called */
      {
          success = SDLVisualTest_InitVariation(&variator->variation,
                                                &variator->config);
          if(!success)
          {
              SDLTest_LogError("SDLVisualTest_InitVariation() failed");
              return NULL;
          }
          success = SDLVisualTest_MakeStrFromVariation(&variator->variation,
                    &variator->config, variator->buffer, MAX_SUT_ARGS_LEN);
          if(!success)
          {
              SDLTest_LogError("SDLVisualTest_MakeStrFromVariation() failed");
              return NULL;
          }
          return variator->buffer;
      }
      else
      {
          success = NextVariation(&variator->variation, &variator->config);
          if(success == 1)
          {
              success = SDLVisualTest_MakeStrFromVariation(&variator->variation,
                        &variator->config, variator->buffer, MAX_SUT_ARGS_LEN);
              if(!success)
              {
                  SDLTest_LogError("SDLVisualTest_MakeStrFromVariation() failed");
                  return NULL;
              }
              return variator->buffer;
          }
          else if(success == -1)
              SDLTest_LogError("NextVariation() failed.");
          return NULL;
      }
      return NULL;
  }
  
  void
  SDLVisualTest_FreeExhaustiveVariator(SDLVisualTest_ExhaustiveVariator* variator)
  {
      if(!variator)
      {
          SDLTest_LogError("variator argument cannot be NULL");
          return;
      }
      SDL_free(variator->variation.vars);
      variator->variation.vars = NULL;
  }