HP gnu source-level debugger 5992-4701 Information about a frame, Frame. See Selecting a frame

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 77).

up-silentlyn, These two commands are variants of up and down, down-silentlyn 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 73).

74 Examining the Stack