What has changed in GDB?
(Organized release by release)
-*** Changes since GDB 7.9
+*** Changes since GDB 7.10
+
+* The new convenience variable $_inferior holds the number of the
+ current inferior.
+
+* Record btrace now supports non-stop mode.
+
+* Support for tracepoints on aarch64-linux was added in GDBserver.
+
+* The 'record instruction-history' command now indicates speculative execution
+ when using the Intel Processor Trace recording format.
+
+* GDB now allows users to specify explicit locations, bypassing
+ the linespec parser. This feature is also available to GDB/MI
+ clients.
+
+* Multi-architecture debugging is supported on AArch64 GNU/Linux.
+ GDB now is able to debug both AArch64 applications and ARM applications
+ at the same time.
+
+* Support for fast tracepoints on aarch64-linux was added in GDBserver,
+ including JIT compiling fast tracepoint's conditional expression bytecode
+ into native code.
+
+* GDB now supports displaced stepping on AArch64 GNU/Linux.
+
+* "info threads", "info inferiors", "info display", "info checkpoints"
+ and "maint info program-spaces" now list the corresponding items in
+ ascending ID order, for consistency with all other "info" commands.
+
+* In Ada, the overloads selection menu has been enhanced to display the
+ parameter types and the return types for the matching overloaded subprograms.
+
+* New commands
+
+maint set target-non-stop (on|off|auto)
+maint show target-non-stop
+ Control whether GDB targets always operate in non-stop mode even if
+ "set non-stop" is "off". The default is "auto", meaning non-stop
+ mode is enabled if supported by the target.
+
+maint set bfd-sharing
+maint show bfd-sharing
+ Control the reuse of bfd objects.
+
+set debug bfd-cache
+show debug bfd-cache
+ Control display of debugging info regarding bfd caching.
+
+set remote multiprocess-extensions-packet
+show remote multiprocess-extensions-packet
+ Set/show the use of the remote protocol multiprocess extensions.
+
+set remote thread-events
+show remote thread-events
+ Set/show the use of thread create/exit events.
+
+set ada print-signatures on|off
+show ada print-signatures"
+ Control whether parameter types and return types are displayed in overloads
+ selection menus. It is activaled (@code{on}) by default.
+
+* The "disassemble" command accepts a new modifier: /s.
+ It prints mixed source+disassembly like /m with two differences:
+ - disassembled instructions are now printed in program order, and
+ - and source for all relevant files is now printed.
+ The "/m" option is now considered deprecated: its "source-centric"
+ output hasn't proved useful in practice.
+
+* The "record instruction-history" command accepts a new modifier: /s.
+ It behaves exactly like /m and prints mixed source+disassembly.
+
+* The "set scheduler-locking" command supports a new mode "replay".
+ It behaves like "off" in record mode and like "on" in replay mode.
+
+* Support for various ROM monitors has been removed:
+
+ target dbug dBUG ROM monitor for Motorola ColdFire
+ target picobug Motorola picobug monitor
+ target dink32 DINK32 ROM monitor for PowerPC
+ target m32r Renesas M32R/D ROM monitor
+ target mon2000 mon2000 ROM monitor
+ target ppcbug PPCBUG ROM monitor for PowerPC
+
+* Support for reading/writing memory and extracting values on architectures
+ whose memory is addressable in units of any integral multiple of 8 bits.
+
+* New remote packets
+
+exec stop reason
+ Indicates that an exec system call was executed.
+
+exec-events feature in qSupported
+ The qSupported packet allows GDB to request support for exec
+ events using the new 'gdbfeature' exec-event, and the qSupported
+ response can contain the corresponding 'stubfeature'. Set and
+ show commands can be used to display whether these features are enabled.
+
+vCtrlC
+ Equivalent to interrupting with the ^C character, but works in
+ non-stop mode.
+
+thread created stop reason (T05 create:...)
+ Indicates that the thread was just created and is stopped at entry.
+
+thread exit stop reply (w exitcode;tid)
+ Indicates that the thread has terminated.
+
+QThreadEvents
+ Enables/disables thread create and exit event reporting. For
+ example, this is used in non-stop mode when GDB stops a set of
+ threads and synchronously waits for the their corresponding stop
+ replies. Without exit events, if one of the threads exits, GDB
+ would hang forever not knowing that it should no longer expect a
+ stop for that same thread.
+
+N stop reply
+
+ Indicates that there are no resumed threads left in the target (all
+ threads are stopped). The remote stub reports support for this stop
+ reply to GDB's qSupported query.
+
+QCatchSyscalls:1 [;SYSNO]...
+QCatchSyscalls:0
+ Enable ("QCatchSyscalls:1") or disable ("QCatchSyscalls:0")
+ catching syscalls from the inferior process.
+
+syscall_entry stop reason
+ Indicates that a syscall was just called.
+
+syscall_return stop reason
+ Indicates that a syscall just returned.
+
+QCatchSyscalls:1 in qSupported
+ The qSupported packet may now include QCatchSyscalls:1 in the reply
+ to indicate support for catching syscalls.
+
+* Extended-remote exec events
+
+ ** GDB now has support for exec events on extended-remote Linux targets.
+ For such targets with Linux kernels 2.5.46 and later, this enables
+ follow-exec-mode and exec catchpoints.
+
+set remote exec-event-feature-packet
+show remote exec-event-feature-packet
+ Set/show the use of the remote exec event feature.
+
+ * Thread names in remote protocol
+
+ The reply to qXfer:threads:read may now include a name attribute for each
+ thread.
+
+* Target remote mode fork and exec events
+
+ ** GDB now has support for fork and exec events on target remote mode
+ Linux targets. For such targets with Linux kernels 2.5.46 and later,
+ this enables follow-fork-mode, detach-on-fork, follow-exec-mode, and
+ fork and exec catchpoints.
+
+* Remote syscall events
+
+ ** GDB now has support for catch syscall on remote Linux targets,
+ currently enabled on x86/x86_64 architectures.
+
+set remote catch-syscall-packet
+show remote catch-syscall-packet
+ Set/show the use of the remote catch syscall feature.
+
+* MI changes
+
+ ** The -var-set-format command now accepts the zero-hexadecimal
+ format. It outputs data in hexadecimal format with zero-padding on the
+ left.
+
+*** Changes in GDB 7.10
* Support for process record-replay and reverse debugging on aarch64*-linux*
targets has been added. GDB now supports recording of A64 instruction set
show mpx bound
set mpx bound on i386 and amd64
- Support for bound table investigation on Intel(R) MPX enabled applications.
+ Support for bound table investigation on Intel MPX enabled applications.
+
+record btrace pt
+record pt
+ Start branch trace recording using Intel Processor Trace format.
+
+maint info btrace
+ Print information about branch tracing internals.
+
+maint btrace packet-history
+ Print the raw branch tracing data.
+
+maint btrace clear-packet-history
+ Discard the stored raw branch tracing data.
+
+maint btrace clear
+ Discard all branch tracing data. It will be fetched and processed
+ anew by the next "record" command.
* New options
show debug linux-namespaces
Control display of debugging info regarding Linux namespaces.
+set|show record btrace pt buffer-size
+ Set and show the size of the ring buffer used for branch tracing in
+ Intel Processor Trace format.
+ The obtained size may differ from the requested size. Use "info
+ record" to see the obtained buffer size.
+
+maint set|show btrace pt skip-pad
+ Set and show whether PAD packets are skipped when computing the
+ packet history.
+
* The command 'thread apply all' can now support new option '-ascending'
to call its specified command for all threads in ascending order.
Qbtrace-conf:bts:size
Set the requested ring buffer size for branch tracing in BTS format.
+Qbtrace:pt
+ Enable Intel Procesor Trace-based branch tracing for the current
+ process. The remote stub reports support for this packet to GDB's
+ qSupported query.
+
+Qbtrace-conf:pt:size
+ Set the requested ring buffer size for branch tracing in Intel Processor
+ Trace format.
+
swbreak stop reason
Indicates a memory breakpoint instruction was executed, irrespective
of whether it was GDB that planted the breakpoint or the breakpoint
--with-intel-pt
This configure option allows the user to build GDB with support for
- Intel(R) Processor Trace (default: auto). This requires libipt.
+ Intel Processor Trace (default: auto). This requires libipt.
--with-libipt-prefix=PATH
Specify the path to the version of libipt that GDB should use.
can be used to launch native programs even when "set
auto-connect-native-target" is set to off.
-* GDB now supports access to Intel(R) MPX registers on GNU/Linux.
+* GDB now supports access to Intel MPX registers on GNU/Linux.
-* Support for Intel(R) AVX-512 registers on GNU/Linux.
- Support displaying and modifying Intel(R) AVX-512 registers
+* Support for Intel AVX-512 registers on GNU/Linux.
+ Support displaying and modifying Intel AVX-512 registers
$zmm0 - $zmm31 and $k0 - $k7 on GNU/Linux.
* New remote packets
projects / binutils.git / blobdiff