Which command in GDB can show the stack memory?
Use: bt – backtrace: show stack functions and args. info frame – show stack start/end/args/locals pointers. x/100x $sp – show stack memory.
How do I check my stack frame?
Examining Stack Frames
- Use backtrace to display all of the stack frames from the current point of execution back to main .
- The up , down , and frame n commands allow you to change the selected frame.
- The info frame command tells you the story about this stack frame.
What is stack frame in GDB?
Stack frames are regions of memory allocated on the stack to hold the local variables of functions each time they are called. When one function calls another, a new stack frame is allocated and placed on top of the current function’s stack frame. When a function returns, its stack frame is de-allocated.
What is stack frame in memory?
Each function has local memory associated with it to hold incoming parameters, local variables, and (in some cases) temporary variables. This region of memory is called a stack frame and is allocated on the process’ stack. Subtract the space needed for the function’s data from the stack pointer.
Where are the stack frames allocated in gdb?
All the stack frames are allocated in a region of memory called the call stack. When your program stops, the GDB commands for examining the stack allow you to see all of this information. One of the stack frames is selectedby GDB and many GDB commands refer implicitly to the selected frame.
When do you need to examine the stack in gdb?
This is useful mainly if the chaining of stack frames has been damaged by a bug, making it impossible for GDB to assign numbers properly to all frames. In addition, this can be useful when your program has multiple stacks and switches between them.
What happens when a program stops in gdb?
When your program stops, the GDB commands for examining the stack allow you to see all of this information. One of the stack frames is selected by GDB and many GDB commands refer implicitly to the selected frame. In particular, whenever you ask GDB for the value of a variable in your program,…
Which is the GDB command to examine memory?
Examining memory : This is pretty much useful when debugging a program: “x” is the command which can be used for the same purpose.. The general format of ‘x’ command as shown here. (gdb) help x. Examine memory: x/FMT ADDRESS. ADDRESS is an expression for the memory address to examine.