text: /* TEMPLATE GENERATED TESTCASE FILE
  Filename: CWE127_Buffer_Underread__wchar_t_alloca_cpy_31.c
  Label Definition File: CWE127_Buffer_Underread.stack.label.xml
  Template File: sources-sink-31.tmpl.c
  */
  /*
   * @description
   * CWE: 127 Buffer Under-read
   * BadSource:  Set data pointer to before the allocated memory buffer
   * GoodSource: Set data pointer to the allocated memory buffer
   * Sinks: cpy
   *    BadSink : Copy data to string using wcscpy
   * Flow Variant: 31 Data flow using a copy of data within the same function
   *
   * */
  
  #include "std_testcase.h"
  
  #include <wchar.h>
  
  #ifndef OMITBAD
  
  void CWE127_Buffer_Underread__wchar_t_alloca_cpy_31_bad()
  {
      wchar_t * data;
      wchar_t * dataBuffer = (wchar_t *)ALLOCA(100*sizeof(wchar_t));
      wmemset(dataBuffer, L'A', 100-1);
      dataBuffer[100-1] = L'\0';
      /* FLAW: Set data pointer to before the allocated memory buffer */
      data = dataBuffer - 8;
      {
          wchar_t * dataCopy = data;
          wchar_t * data = dataCopy;
          {
              wchar_t dest[100*2];
              wmemset(dest, L'C', 100*2-1); /* fill with 'C's */
              dest[100*2-1] = L'\0'; /* null terminate */
              /* POTENTIAL FLAW: Possibly copy from a memory location located before the source buffer */
              wcscpy(dest, data);
              printWLine(dest);
          }
      }
  }
  
  #endif /* OMITBAD */
  
  #ifndef OMITGOOD
  
  /* goodG2B() uses the GoodSource with the BadSink */
  static void goodG2B()
  {
      wchar_t * data;
      wchar_t * dataBuffer = (wchar_t *)ALLOCA(100*sizeof(wchar_t));
      wmemset(dataBuffer, L'A', 100-1);
      dataBuffer[100-1] = L'\0';
      /* FIX: Set data pointer to the allocated memory buffer */
      data = dataBuffer;
      {
          wchar_t * dataCopy = data;
          wchar_t * data = dataCopy;
          {
              wchar_t dest[100*2];
              wmemset(dest, L'C', 100*2-1); /* fill with 'C's */
              dest[100*2-1] = L'\0'; /* null terminate */
              /* POTENTIAL FLAW: Possibly copy from a memory location located before the source buffer */
              wcscpy(dest, data);
              printWLine(dest);
          }
      }
  }
  
  void CWE127_Buffer_Underread__wchar_t_alloca_cpy_31_good()
  {
      goodG2B();
  }
  
  #endif /* OMITGOOD */
  
  /* Below is the main(). It is only used when building this testcase on
   * its own for testing or for building a binary to use in testing binary
   * analysis tools. It is not used when compiling all the testcases as one
   * application, which is how source code analysis tools are tested.
   */
  #ifdef INCLUDEMAIN
  
  int main(int argc, char * argv[])
  {
      /* seed randomness */
      srand( (unsigned)time(NULL) );
  #ifndef OMITGOOD
      printLine("Calling good()...");
      CWE127_Buffer_Underread__wchar_t_alloca_cpy_31_good();
      printLine("Finished good()");
  #endif /* OMITGOOD */
  #ifndef OMITBAD
      printLine("Calling bad()...");
      CWE127_Buffer_Underread__wchar_t_alloca_cpy_31_bad();
      printLine("Finished bad()");
  #endif /* OMITBAD */
      return 0;
  }
  
  #endif
  