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V505. The 'alloca' function is used ins…
Analyzer Diagnostics
General Analysis (C++)
General Analysis (C#)
General Analysis (Java)
Diagnosis of micro-optimizations (C++)
Diagnosis of 64-bit errors (Viva64, C++)
MISRA errors
AUTOSAR errors
Additional information
Contents

V505. The 'alloca' function is used inside the loop. This can quickly overflow stack.

Nov 19 2010

The analyzer detected a use of the alloca function inside a loop. Since the alloca function uses stack memory, its repeated call in the loop body might unexpectedly cause a stack overflow.

Here is an example of dangerous code:

for (size_t i = 0; i < n; ++i)
  if (wcscmp(strings[i], A2W(pszSrc[i])) == 0)
  { 
    ...
  }

The _alloca function is used inside the A2W macro. Whether this code will cause an error or not depends upon the length of the processed strings, their number and size of the available stack.

This diagnostic is classified as:

You can look at examples of errors detected by the V505 diagnostic.

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