Red Hat Developer Toolset 1.x User Guide - Linux

Red Hat Developer Toolset 1.x User Guide 79
the user to find threads that match it.
GDB now provides support for reading and writing a new .gdb_index section. The command gdbadd-index
can be used to add .gdb_index to a file, which allows GDB to load symbols from that
file faster. Note that this feature is already present in Red Hat Enterprise Linux 6.1 and later.
The watch command has been adapted to accept -location as an optional argument.
Two new special values can now be used when specifying the current search path for
libthread_db: $sdir represents the default system locations of shared libraries, and $pdir
stands for the directory with the libthread that is used by the application.
A new command info macros has been added. This command accepts linespec as an optional
argument and can be used to display the definitions of macros at that linespec location. Note that in
order to do this, the debugged program must be compiled with the -g3 command line option to have
macro information available in it.
A new command alias has been added. This command can be used to create an alias of an
existing command.
The info macro command now accepts -all and -- as valid options.
To display a function parameter's entry value (that is, the value at the time of function entry), the
suffix @entry can be added to the parameter. GDB now displays @entry values in backtraces, if
available.
New set print entry-values and show print entry-values commands have been added.
The set print entry-values command accepts both, compact, default, if-needed, no,
only, and preferred as valid arguments and can be used to enable printing of function
arguments at function entry. The show print entry-values command can be used to determine
whether this feature is enabled.
New set debug entry-values and show debug entry-values commands have been added.
The set debug entry-values command can be used to enable printing of debugging information
for determining frame argument values at function entry and virtual tail call frames.
!command has been added as an alias of shell command.
The watch command now accepts mask mask_value as an argument. This can be used to create
masked watchpoints.
New set extended-prompt and show extended-prompt commands have been added. The
set extended-prompt command enables support for a defined set of escape sequences that
can be used to display various information. The show extended-prompt command can be used
to determine whether the extended prompt is enabled.
New set basenames-may-differ and show basenames-may-differ commands have been
added. The set basenames-may-differ command enables support for source files with multiple
base names. The show basenames-may-differ command can be used to determine whether
this support is enabled. The default option is off to allow faster GDB operations.
A new command line option -ix (or --init-command) has been added. This option acts like -x (or
--command), but is executed before loading the debugged program.
A new command line option -iex (or --init-eval-command) has been added. This option acts
like -ex (or --eval-command), but is executed before loading the debugged program.
The following changes have been made to the C++ language support since the release of the GNU
Debugger included in Red Hat Enterprise Linux 6.2:
When debugging a template instantiation, parameters of the template are now put in scope.
The following changes have been made to the Python scripting support since the release of the GNU
Debugger included in Red Hat Enterprise Linux 6.2:
The register_pretty_printer function in module gdb.printing now takes an optional