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authorK. Richard Pixley <rich@cygnus>1992-12-08 04:59:31 +0000
committerK. Richard Pixley <rich@cygnus>1992-12-08 04:59:31 +0000
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-_dnl__ -*- Texinfo -*-
-_dnl__ Copyright (c) 1988 1989 1990 1991 Free Software Foundation, Inc.
-_dnl__ This file is part of the source for the GDB manual.
-@c M4 FRAGMENT: $Id$
-@node Symbols, Altering, Data, Top
-@chapter Examining the Symbol Table
-
-The commands described in this section allow you to inquire about the
-symbols (names of variables, functions and types) defined in your
-program. This information is inherent in the text of your program and
-does not change as the program executes. _GDBN__ finds it in your
-program's symbol table, in the file indicated when you started _GDBN__
-(@pxref{File Options}), or by one of the file-management commands
-(@pxref{Files}).
-
-@table @code
-@item info address @var{symbol}
-@kindex info address
-Describe where the data for @var{symbol} is stored. For a register
-variable, this says which register it is kept in. For a non-register
-local variable, this prints the stack-frame offset at which the variable
-is always stored.
-
-Note the contrast with @samp{print &@var{symbol}}, which does not work
-at all for a register variables, and for a stack local variable prints
-the exact address of the current instantiation of the variable.
-
-@item whatis @var{exp}
-@kindex whatis
-Print the data type of expression @var{exp}. @var{exp} is not
-actually evaluated, and any side-effecting operations (such as
-assignments or function calls) inside it do not take place.
-@xref{Expressions}.
-
-@item whatis
-Print the data type of @code{$}, the last value in the value history.
-
-@item ptype @var{typename}
-@kindex ptype
-Print a description of data type @var{typename}. @var{typename} may be
-the name of a type, or for C code it may have the form
-@samp{struct @var{struct-tag}}, @samp{union @var{union-tag}} or
-@samp{enum @var{enum-tag}}.@refill
-
-@item ptype @var{exp}
-Print a description of the type of expression @var{exp}. @code{ptype}
-differs from @code{whatis} by printing a detailed description, instead of just
-the name of the type. For example, if your program declares a variable
-as
-@example
-struct complex @{double real; double imag;@} v;
-@end example
-@noindent
-compare the output of the two commands:
-@example
-(_GDBP__) whatis v
-type = struct complex
-(_GDBP__) ptype v
-type = struct complex @{
- double real;
- double imag;
-@}
-@end example
-
-@item info types @var{regexp}
-@itemx info types
-@kindex info types
-Print a brief description of all types whose name matches @var{regexp}
-(or all types in your program, if you supply no argument). Each
-complete typename is matched as though it were a complete line; thus,
-@samp{i type value} gives information on all types in your program whose
-name includes the string @code{value}, but @samp{i type ^value$} gives
-information only on types whose complete name is @code{value}.
-
-This command differs from @code{ptype} in two ways: first, like
-@code{whatis}, it does not print a detailed description; second, it
-lists all source files where a type is defined.
-
-@item info source
-@kindex info source
-Show the name of the current source file---that is, the source file for
-the function containing the current point of execution.
-
-@item info sources
-@kindex info sources
-Print the names of all source files in the program for which there is
-debugging information, organized into two lists: those for which symbols
-have been read in, and those for which symbols will be read in on
-demand.
-@c FIXME: above passive AND awkward!
-
-@item info functions
-@kindex info functions
-Print the names and data types of all defined functions.
-
-@item info functions @var{regexp}
-Print the names and data types of all defined functions
-whose names contain a match for regular expression @var{regexp}.
-Thus, @samp{info fun step} finds all functions whose names
-include @code{step}; @samp{info fun ^step} finds those whose names
-start with @code{step}.
-
-@item info variables
-@kindex info variables
-Print the names and data types of all variables that are declared
-outside of functions (i.e., excluding local variables).
-
-@item info variables @var{regexp}
-Print the names and data types of all variables (except for local
-variables) whose names contain a match for regular expression
-@var{regexp}.
-
-
-@ignore
-This was never implemented.
-@item info methods
-@itemx info methods @var{regexp}
-@kindex info methods
-The @code{info methods} command permits the user to examine all defined
-methods within C++ program, or (with the @var{regexp} argument) a
-specific set of methods found in the various C++ classes. Many
-C++ classes provide a large number of methods. Thus, the output
-from the @code{ptype} command can be overwhelming and hard to use. The
-@code{info-methods} command filters the methods, printing only those
-which match the regular-expression @var{regexp}.
-@end ignore
-
-@item printsyms @var{filename}
-@kindex printsyms
-Write a complete dump of the debugger's symbol data into the
-file @var{filename}.
-@end table