Debugging with GDB Manual The GNU Source-Level Debugger (769148-001, March 2014)

M-x gdb-nexti Execute to next instruction, using the GDB nexti command; update display
window accordingly.
C-c C-f Execute until exit from the selected stack frame, like the GDB finish
command.
M-c Continue execution of your program, like the GDB continue command.
WARNING! In Emacs v19, this command is C-c C-p.
M-u Go up the number of frames indicated by the numeric argument (see section
"Numeric Arguments" in The gnu Emacs Manual), like the GDB up command.
WARNING! In Emacs v19, this command is C-c C-u.
M-d Go down the number of frames indicated by the numeric argument, like the
GDB down command.
WARNING! In Emacs v19, this command is C-c C-d.
C-x & Read the number where the cursor is positioned, and insert it at the end of
the GDB I/O buffer. For example, if you wish to disassemble code around
an address that was displayed earlier, type disassemble; then move the
cursor to the address display, and pick up the argument for disassemble by
typing C-x &.
You can customize this further by defining elements of the list gdb-print-
command; once it is defined, you can format or otherwise process numbers
picked up by C-x & before they are inserted. A numeric argument to C-x
& indicates that you wish special formatting, and also acts as an index to
pick an element of the list. If the list element is a string, the number to be
inserted is formatted using the Emacs function format; otherwise the number
is passed as an argument to the corresponding list element.
In any source file, the Emacs command C-x SPC (gdb-break) tells GDB to set a break- point
on the source line point is on.
If you accidentally delete the source-display buffer, an easy way to get it back is to type the
command f in the GDB buffer, to request a frame display; when you run under Emacs, this recreates
the source buffer if necessary to show you the context of the current frame.
The source files displayed in Emacs are in ordinary Emacs buffers which are visiting the source
files in the usual way. You can edit the files with these buffers if you wish; but keep in mind that
GDB communicates with Emacs in terms of line numbers. If you add or delete lines from the text,
the line numbers that GDB knows cease to correspond properly with the code.
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