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 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
Control whether breakpoint conditions are evaluated by GDB ("host") or by
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
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