architectures require kernel changes. TLS is not yet supported for
amd64 and i386 process core dumps.
-* Support for Pointer Authentication on AArch64 Linux.
+* Support for Pointer Authentication (PAC) on AArch64 Linux. Return
+ addresses that required unmasking are shown in the backtrace with the
+ postfix [PAC].
* Two new convenience functions $_cimag and $_creal that extract the
imaginary and real parts respectively from complex numbers.
provide the exitcode or exit status of the shell commands launched by
GDB commands such as "shell", "pipe" and "make".
+* The RX port now supports XML target descriptions.
+
* Python API
** The gdb.Value type has a new method 'format_string' which returns a
** gdb.Type has a new property 'objfile' which returns the objfile the
type was defined in.
+ ** The frame information printed by the python frame filtering code
+ is now consistent with what the 'backtrace' command prints when
+ there are no filters, or when the 'backtrace' '-no-filters' option
+ is given.
+
+ ** The new function gdb.lookup_static_symbol can be used to look up
+ symbols with static linkage.
+
+ ** gdb.Objfile has new methods 'lookup_global_symbol' and
+ 'lookup_static_symbol' to lookup a symbol from this objfile only.
+
+ ** gdb.Block now supports the dictionary syntax for accessing symbols in
+ this block (e.g. block['local_variable']).
+
* New commands
| [COMMAND] | SHELL_COMMAND
With no COMMAND, repeat the last executed command
and send its output to SHELL_COMMAND.
+with SETTING [VALUE] [-- COMMAND]
+w SETTING [VALUE] [-- COMMAND]
+ Temporarily set SETTING, run COMMAND, and restore SETTING.
+ Usage: with SETTING -- COMMAND
+ With no COMMAND, repeats the last executed command.
+ SETTING is any GDB setting you can change with the "set"
+ subcommands. For example, 'with language c -- print someobj'
+ temporarily switches to the C language in order to print someobj.
+ Settings can be combined: 'w lang c -- w print elements unlimited --
+ usercmd' switches to the C language and runs usercmd with no limit
+ of array elements to print.
+
+maint with SETTING [VALUE] [-- COMMAND]
+ Like "with", but works with "maintenance set" settings.
+
set may-call-functions [on|off]
show may-call-functions
This controls whether GDB will attempt to call functions in
set style highlight intensity VALUE
Control the styling of highlightings.
-maint test-settings KIND
+maint set test-settings KIND
+maint show test-settings KIND
A set of commands used by the testsuite for exercising the settings
infrastructure.
+set print frame-info [short-location|location|location-and-address
+ |source-and-location|source-line|auto]
+show print frame-info
+ This controls what frame information is printed by the commands printing
+ a frame. This setting will e.g. influence the behaviour of 'backtrace',
+ 'frame', 'stepi'. The python frame filtering also respect this setting.
+ The 'backtrace' '-frame-info' option can override this global setting.
+
* Changed commands
help
of matching commands and to use the highlight style to mark
the documentation parts matching REGEXP.
+printf
+eval
+ The GDB printf and eval commands can now print C-style and Ada-style
+ string convenience variables without calling functions in the program.
+ This allows to do formatted printing of strings without having
+ a running inferior, or when debugging a core dump.
+
+info sources [-dirname | -basename] [--] [REGEXP]
+ This command has now optional arguments to only print the files
+ whose names match REGEXP. The arguments -dirname and -basename
+ allow to restrict matching respectively to the dirname and basename
+ parts of the files.
+
show style
The "show style" and its subcommands are now styling
a style name in their output using its own style, to help
the user visualize the different styles.
+set print frame-arguments
+ The new value 'presence' indicates to only indicate the presence of
+ arguments using ..., instead of printing argument names and values.
+
set print raw-frame-arguments
show print raw-frame-arguments
-entry-values no|only|preferred|if-needed|both|compact|default
-frame-arguments all|scalars|none
-raw-frame-arguments [on|off]
+ -frame-info auto|source-line|location|source-and-location
+ |location-and-address|short-location
-past-main [on|off]
-past-entry [on|off]
-past-main [on|off]
-past-entry [on|off]
+ ** The new "info sources" options -dirname and -basename options
+ are using the standard '-OPT' infrastructure.
+
All options above can also be abbreviated. The argument of boolean
(on/off) options can be 0/1 too, and also the argument is assumed
"on" if omitted. This allows writing compact command invocations,
(gdb) print -raw -pretty -object off -- *myptr
+ ** The "info types" command now supports the '-q' flag to disable
+ printing of some header information in a similar fashion to "info
+ variables" and "info functions".
+
+ ** The "info variables", "info functions", and "whereis" commands
+ now take a '-n' flag that excludes non-debug symbols (symbols
+ from the symbol table, not from the debug info such as DWARF)
+ from the results.
+
* Completion improvements
** GDB can now complete the options of the "thread apply all" and
"taas" commands, and their "-ascending" option can now be
abbreviated.
+ ** GDB can now complete the options of the "info threads", "info
+ functions", "info variables", "info locals", and "info args"
+ commands.
+
** GDB can now complete the options of the "compile file" and
"compile code" commands. The "compile file" command now
completes on filenames.
These can be used to catch C++ exceptions in a similar fashion to
the CLI commands 'catch throw', 'catch rethrow', and 'catch catch'.
+* Other MI changes
+
+ ** Backtraces and frames include a new optional field addr_flags which is
+ given after the addr field. On AArch64 this contains PAC if the address
+ has been masked in the frame. On all other targets the field is not
+ present.
+
* Testsuite
The testsuite now creates the files gdb.cmd (containing the arguments
GDB) in the output directory for each test script. Multiple invocations
are appended with .1, .2, .3 etc.
+* Building GDB and GDBserver now requires GNU make >= 3.82.
+
+ Using another implementation of the make program or an earlier version of
+ GNU make to build GDB or GDBserver is not supported.
+
+* Building GDB now requires GNU readline >= 7.0.
+
+ GDB now bundles GNU readline 8.0, but if you choose to use
+ --with-system-readline, only readline >= 7.0 can be used.
+
*** Changes in GDB 8.3
* GDB and GDBserver now support access to additional registers on
projects / external / binutils.git / blobdiff