Gdb/Address-Locations
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9.2.3 Address Locations
Address locations indicate a specific program address. They have
the generalized form *address
.
For line-oriented commands, such as list
and edit
, this
specifies a source line that contains address
. For break
and
other breakpoint-oriented commands, this can be used to set breakpoints in
parts of your program which do not have debugging information or
source files.
Here address
may be any expression valid in the current working
language (see working language) that specifies a code
address. In addition, as a convenience, GDB extends the
semantics of expressions used in locations to cover several situations
that frequently occur during debugging. Here are the various forms
of address
:
expression
Any expression valid in the current working language.
funcaddr
An address of a function or procedure derived from its name. In C, C
++
, Objective-C, Fortran, minimal, and assembly, this is simply the function’s namefunction
(and actually a special case of a valid expression). In Pascal and Modula-2, this is&function
. In Ada, this isfunction'Address
(although the Pascal form also works).This form specifies the address of the function’s first instruction, before the stack frame and arguments have been set up.
'filename':funcaddr
Like
funcaddr
above, but also specifies the name of the source file explicitly. This is useful if the name of the function does not specify the function unambiguously, e.g., if there are several functions with identical names in different source files.