Debugging with GDB Manual (5900-1473; WDB 6.2; January 2011)

NOTE:
• On the SPARC architecture, frame needs two addresses to select
an arbitrary frame: a frame pointer and a stack pointer.
• On the MIPS and Alpha architecture, it needs two addresses: a
stack pointer and a program counter.
• On the 29k architecture, it needs three addresses: a register stack
pointer, a program counter, and a memory stack pointer.
up n Move n frames up the stack. For positive numbers n, this advances
toward the outermost frame, to higher frame numbers, to frames that
have existed longer. n defaults to one.
down n Move n frames down the stack. For positive numbers n, this advances
toward the innermost frame, to lower frame numbers, to frames that
were created more recently. n defaults to one. You may abbreviate
down as do.
All of these commands end by printing two lines of output describing the frame. The first
line shows the frame number, the function name, the arguments, and the source file and
line number of execution in that frame. The second line shows the text of that source line.
For example:
((gdb)) up
#1 0x22f0 in main (argc=1, argv=0xf7fffbf4, env=0xf7fffbfc)
at env.c:10
10 read_input_file (argv[i]);
After such a printout, the list command with no arguments prints ten lines centered on
the point of execution in the frame. See “Printing source lines” (page 71).
up-silently n,
down-silently n
These two commands are variants of up and down, respectively;
they differ in that they do their work silently, without causing
display of the new frame. They are intended primarily for use
in GDB command scripts, where the output might be unnecessary
and distracting.
6.6 Information about a frame
The following commands are used to print information about the selected stack frame:
frame, f When used without any argument, this command does not
change which frame is selected, but prints a brief description
of the currently selected stack frame. It can be abbreviated f.
With an argument, this command is used to select a stack frame.
See “Selecting a frame” (page 68).
6.6 Information about a frame 69