What has changed in GDB?
(Organized release by release)
-*** Changes since GDB 7.4
+*** Changes since GDB 7.5
+
+*** Changes in GDB 7.5
+
+* GDB now supports x32 ABI. Visit <http://sites.google.com/site/x32abi/>
+ for more x32 ABI info.
+
+* GDB now supports access to MIPS DSP registers on Linux targets.
+
+* GDB now supports debugging microMIPS binaries.
+
+* The "info os" command on GNU/Linux can now display information on
+ several new classes of objects managed by the operating system:
+ "info os procgroups" lists process groups
+ "info os files" lists file descriptors
+ "info os sockets" lists internet-domain sockets
+ "info os shm" lists shared-memory regions
+ "info os semaphores" lists semaphores
+ "info os msg" lists message queues
+ "info os modules" lists loaded kernel modules
+
+* GDB now has support for SDT (Static Defined Tracing) probes. Currently,
+ the only implemented backend is for SystemTap probes (<sys/sdt.h>). You
+ can set a breakpoint using the new "-probe, "-pstap" or "-probe-stap"
+ options and inspect the probe arguments using the new $_probe_arg family
+ of convenience variables. You can obtain more information about SystemTap
+ in <http://sourceware.org/systemtap/>.
* GDB now supports reversible debugging on ARM, it allows you to
debug basic ARM and THUMB instructions, and provides
** A new method 'referenced_value' on gdb.Value objects which can
dereference pointer as well as C++ reference values.
+ ** New methods 'global_block' and 'static_block' on gdb.Symtab objects
+ which return the global and static blocks (as gdb.Block objects),
+ of the underlying symbol table, respectively.
+
+ ** New function gdb.find_pc_line which returns the gdb.Symtab_and_line
+ object associated with a PC value.
+
+ ** gdb.Symtab_and_line has new attribute 'last' which holds the end
+ of the address range occupied by code for the current source line.
+
+* Go language support.
+ GDB now supports debugging programs written in the Go programming
+ language.
+
* GDBserver now supports stdio connections.
E.g. (gdb) target remote | ssh myhost gdbserver - hello
* The .gdb_index section has been updated to include symbols for
inlined functions. GDB will ignore older .gdb_index sections by
default, which could cause symbol files to be loaded more slowly
- until their .gdb_index sections can be recreated. The new option
- --use-deprecated-index-sections will cause GDB to use any older
- .gdb_index sections it finds. This will restore performance, but
- the ability to set breakpoints on inlined functions will be lost
- in symbol files with older .gdb_index sections.
+ until their .gdb_index sections can be recreated. The new command
+ "set use-deprecated-index-sections on" will cause GDB to use any older
+ .gdb_index sections it finds. This will restore performance, but the
+ ability to set breakpoints on inlined functions will be lost in symbol
+ files with older .gdb_index sections.
+
+ The .gdb_index section has also been updated to record more information
+ about each symbol. This speeds up the "info variables", "info functions"
+ and "info types" commands when used with programs having the .gdb_index
+ section, as well as speeding up debugging with shared libraries using
+ the .gdb_index section.
+
+* Ada support for GDB/MI Variable Objects has been added.
+
+* GDB can now support 'breakpoint always-inserted mode' in 'record'
+ target.
+
+* MI changes
+
+ ** New command -info-os is the MI equivalent of "info os".
+
+ ** Output logs ("set logging" and related) now include MI output.
* New commands
+ ** "set use-deprecated-index-sections on|off"
+ "show use-deprecated-index-sections on|off"
+ Controls the use of deprecated .gdb_index sections.
+
** "catch load" and "catch unload" can be used to stop when a shared
library is loaded or unloaded, respectively.
** "info vtbl" can be used to show the virtual method tables for
C++ and Java objects.
+ ** "explore" and its sub commands "explore value" and "explore type"
+ can be used to reccursively explore values and types of
+ expressions. These commands are available only if GDB is
+ configured with '--with-python'.
+
+ ** "info auto-load" shows status of all kinds of auto-loaded files,
+ "info auto-load gdb-scripts" shows status of auto-loading GDB canned
+ sequences of commands files, "info auto-load python-scripts"
+ shows status of auto-loading Python script files,
+ "info auto-load local-gdbinit" shows status of loading init file
+ (.gdbinit) from current directory and "info auto-load libthread-db" shows
+ status of inferior specific thread debugging shared library loading.
+
+ ** "info auto-load-scripts", "set auto-load-scripts on|off"
+ and "show auto-load-scripts" commands have been deprecated, use their
+ "info auto-load python-scripts", "set auto-load python-scripts on|off"
+ and "show auto-load python-scripts" counterparts instead.
+
+ ** "dprintf location,format,args..." creates a dynamic printf, which
+ is basically a breakpoint that does a printf and immediately
+ resumes your program's execution, so it is like a printf that you
+ can insert dynamically at runtime instead of at compiletime.
+
+ ** "set print symbol"
+ "show print symbol"
+ Controls whether GDB attempts to display the symbol, if any,
+ corresponding to addresses it prints. This defaults to "on", but
+ you can set it to "off" to restore GDB's previous behavior.
+
+* Deprecated commands
+
+ ** For the Renesas Super-H architecture, the "regs" command has been
+ deprecated, and "info all-registers" should be used instead.
+
* New targets
Renesas RL78 rl78-*-elf
* New options
+set mips compression
+show mips compression
+ Select the compressed ISA encoding used in functions that have no symbol
+ information available. The encoding can be set to either of:
+ mips16
+ micromips
+ and is updated automatically from ELF file flags if available.
+
set breakpoint condition-evaluation
show breakpoint condition-evaluation
- Controls whether breakpoint conditions are evaluated by GDB ("host") or by
+ Control whether breakpoint conditions are evaluated by GDB ("host") or by
GDBserver ("target"). Default option "auto" chooses the most efficient
available mode.
This option can improve debugger efficiency depending on the speed of the
target.
+set auto-load off
+ Disable auto-loading globally.
+
+show auto-load
+ Show auto-loading setting of all kinds of auto-loaded files.
+
+set auto-load gdb-scripts on|off
+show auto-load gdb-scripts
+ Control auto-loading of GDB canned sequences of commands files.
+
+set auto-load python-scripts on|off
+show auto-load python-scripts
+ Control auto-loading of Python script files.
+
+set auto-load local-gdbinit on|off
+show auto-load local-gdbinit
+ Control loading of init file (.gdbinit) from current directory.
+
+set auto-load libthread-db on|off
+show auto-load libthread-db
+ Control auto-loading of inferior specific thread debugging shared library.
+
+set auto-load scripts-directory <dir1>[:<dir2>...]
+show auto-load scripts-directory
+ Set a list of directories from which to load auto-loaded scripts.
+ Automatically loaded Python scripts and GDB scripts are located in one
+ of the directories listed by this option.
+ The delimiter (':' above) may differ according to the host platform.
+
+set auto-load safe-path <dir1>[:<dir2>...]
+show auto-load safe-path
+ Set a list of directories from which it is safe to auto-load files.
+ The delimiter (':' above) may differ according to the host platform.
+
+set debug auto-load on|off
+show debug auto-load
+ Control display of debugging info for auto-loading the files above.
+
+set dprintf-style gdb|call|agent
+show dprintf-style
+ Control the way in which a dynamic printf is performed; "gdb"
+ requests a GDB printf command, while "call" causes dprintf to call a
+ function in the inferior. "agent" requests that the target agent
+ (such as GDBserver) do the printing.
+
+set dprintf-function <expr>
+show dprintf-function
+set dprintf-channel <expr>
+show dprintf-channel
+ Set the function and optional first argument to the call when using
+ the "call" style of dynamic printf.
+
+set disconnected-dprintf on|off
+show disconnected-dprintf
+ Control whether agent-style dynamic printfs continue to be in effect
+ after GDB disconnects.
+
+* New configure options
+
+--with-auto-load-dir
+ Configure default value for the 'set auto-load scripts-directory'
+ setting above. It defaults to '$debugdir:$datadir/auto-load',
+ $debugdir representing global debugging info directories (available
+ via 'show debug-file-directory') and $datadir representing GDB's data
+ directory (available via 'show data-directory').
+
+--with-auto-load-safe-path
+ Configure default value for the 'set auto-load safe-path' setting
+ above. It defaults to the --with-auto-load-dir setting.
+
+--without-auto-load-safe-path
+ Set 'set auto-load safe-path' to '/', effectively disabling this
+ security feature.
+
* New remote packets
z0/z1 conditional breakpoints extension
* New options
+set debug dwarf2-read
+show debug dwarf2-read
+ Turns on or off display of debugging messages related to reading
+ DWARF debug info. The default is off.
+
+set debug symtab-create
+show debug symtab-create
+ Turns on or off display of debugging messages related to symbol table
+ creation. The default is off.
+
set extended-prompt
show extended-prompt
Set the GDB prompt, and allow escape sequences to be inserted to
projects / deliverable / binutils-gdb.git / blobdiff