GNU Info

(gdb.info)Data

---

Next: Tracepoints Prev: Source Up: Top

---

Enter node , (file) or (file)node

Examining Data
**************

   The usual way to examine data in your program is with the `print'
command (abbreviated `p'), or its synonym `inspect'.  It evaluates and
prints the value of an expression of the language your program is
written in (Note: Using GDB with Different Languages.).

`print EXPR'
`print /F EXPR'
     EXPR is an expression (in the source language).  By default the
     value of EXPR is printed in a format appropriate to its data type;
     you can choose a different format by specifying `/F', where F is a
     letter specifying the format; see Note: Output formats.


`print'
`print /F'
     If you omit EXPR, GDB displays the last value again (from the
     "value history"; Note: Value history.).  This
     allows you to conveniently inspect the same value in an
     alternative format.

   A more low-level way of examining data is with the `x' command.  It
examines data in memory at a specified address and prints it in a
specified format.  Note: Examining memory.

   If you are interested in information about types, or about how the
fields of a struct or a class are declared, use the `ptype EXP' command
rather than `print'.  Note: Examining the Symbol Table.

Expressions

Expressions

Variables

Program variables

Arrays

Artificial arrays

Output Formats

Output formats

Memory

Examining memory

Auto Display

Automatic display

Print Settings

Print settings

Value History

Value history

Convenience Vars

Convenience variables

Registers

Registers

Floating Point Hardware

Floating point hardware

Memory Region Attributes

Memory region attributes

Dump/Restore Files

Copy between memory and a file