![]() Ip.cpp:489:7:BYTE* GetData(PIPPKT) 4 static Ip.cpp:702:6:void DoIPPacket(PoolPtr, PEFRAME, WORD) 32 dynamic,bounded Ip.cpp:130:5:int GetMultiHomeInterface4(IPADDR4, int) 40 dynamic,bounded Ip.cpp:190:6:BOOL IsBroadCast(IPADDR4, int) 8 dynamic,bounded Upon analysis, functions with a high stack requirement should be examined to determine if the size requirements are required. This information is generated at compile time and placed in. This compiler flags generates worst case scenario stack usage on a per function basis. GCC provides a few compiler flags to help diagnose and identify stack problems.Ī great first step and heading off stack overflows is to use -fstack-usage. Even if the stack size is planned to fit the local variables, an Interrupt may occur that overflows the stack. Interrupt code is placed on the current task’s stack. An easily missed cause of stack overflow occurs when an Interrupt takes place. Recursively enter a function too many times, and the stack frames may fill up the task stack to the point of overflow. Every time a function in entered, a stack frame is created and placed on the stack. Another failure case is recursion in function calls. The most common example of this is creating a large array that is bigger than the stack: char inputBuffer may not be the best idea on a small embedded system. The basic scenario is that the stack runs out of space. ![]() There are several ways a stack overflow can occur. ![]() If your application runs out of stack space, or a task runs out of it’s allotted stack space, a stack overflow occurs. In a multi-threaded environment, there may be several tasks, each with a stack, utilizing the end of the memory space. On the other end, the stack will be found at the end, growing from the bottom up. Given a memory block in RAM, the heap can be found at the beginning, growing down as an application requests heap space. Along with the heap, a stack will be found in the RAM of your device. A stack can be thought of as memory space an application is free to utilize.
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