#12554: gdb-8.3.1
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Reporter: renodr | Owner: bdubbs
Type: enhancement | Status: assigned
Priority: normal | Milestone: 9.1
Component: BOOK | Version: SVN
Severity: normal | Resolution:
Keywords: |
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Comment (by bdubbs):
Changes in GDB 8.3
* GDB and GDBserver now support access to additional registers on
PowerPC GNU/Linux targets: PPR, DSCR, TAR, EBB/PMU registers, and
HTM registers.
* GDB now has experimental support for the compilation and injection of
C++ source code into the inferior. This beta release does not include
support for several language features, such as templates, constructors,
and operators.
This feature requires GCC 7.1 or higher built with libcp1.so
(the C++ plug-in).
* GDB and GDBserver now support IPv6 connections. IPv6 addresses
can be passed using the '[ADDRESS]:PORT' notation, or the regular
'ADDRESS:PORT' method.
* DWARF index cache: GDB can now automatically save indices of DWARF
symbols on disk to speed up further loading of the same binaries.
* Ada task switching is now supported on aarch64-elf targets when
debugging a program using the Ravenscar Profile. For more information,
see the "Tasking Support when using the Ravenscar Profile" section
in the GDB user manual.
* GDB in batch mode now exits with status 1 if the last command to be
executed failed.
* The RISC-V target now supports target descriptions.
* System call catchpoints now support system call aliases on FreeBSD.
When the ABI of a system call changes in FreeBSD, this is
implemented by leaving a compatibility system call using the old ABI
at the existing number and allocating a new system call number for
the new ABI. For example, FreeBSD 12 altered the layout of 'struct
kevent' used by the 'kevent' system call. As a result, FreeBSD 12
kernels ship with both 'kevent' and 'freebsd11_kevent' system calls.
The 'freebsd11_kevent' system call is assigned an alias of 'kevent'
so that a system call catchpoint for the 'kevent' system call will
catch invocations of both the 'kevent' and 'freebsd11_kevent'
binaries. This ensures that 'kevent' system calls are caught for
binaries using either the old or new ABIs.
* Terminal styling is now available for the CLI and the TUI. GNU
Source Highlight can additionally be used to provide styling of
source code snippets. See the "set style" commands, below, for more
information.
Removed support for old demangling styles arm, edg, gnu, hp and
lucid.
* New commands
{{{
set debug compile-cplus-types
show debug compile-cplus-types
Control the display of debug output about type conversion in the
C++ compile feature. Commands have no effect while compiliong
for other languages.
set debug skip
show debug skip
Control whether debug output about files/functions skipping is
displayed.
frame apply [all | COUNT | -COUNT | level LEVEL...] [FLAG]... COMMAND
Apply a command to some frames.
FLAG arguments allow to control what output to produce and how to handle
errors raised when applying COMMAND to a frame.
taas COMMAND
Apply a command to all threads (ignoring errors and empty output).
Shortcut for 'thread apply all -s COMMAND'.
faas COMMAND
Apply a command to all frames (ignoring errors and empty output).
Shortcut for 'frame apply all -s COMMAND'.
tfaas COMMAND
Apply a command to all frames of all threads (ignoring errors and empty
output).
Shortcut for 'thread apply all -s frame apply all -s COMMAND'.
maint set dwarf unwinders (on|off)
maint show dwarf unwinders
Control whether DWARF unwinders can be used.
info proc files
Display a list of open files for a process.
}}}
* Changed commands
{{{
Changes to the "frame", "select-frame", and "info frame" CLI commands.
These commands all now take a frame specification which
is either a frame level, or one of the keywords 'level', 'address',
'function', or 'view' followed by a parameter. Selecting a frame by
address, or viewing a frame outside the current backtrace now
requires the use of a keyword. Selecting a frame by level is
unchanged. The MI comment "-stack-select-frame" is unchanged.
target remote FILENAME
target extended-remote FILENAME
If FILENAME is a Unix domain socket, GDB will attempt to connect
to this socket instead of opening FILENAME as a character device.
info args [-q] [-t TYPEREGEXP] [NAMEREGEXP]
info functions [-q] [-t TYPEREGEXP] [NAMEREGEXP]
info locals [-q] [-t TYPEREGEXP] [NAMEREGEXP]
info variables [-q] [-t TYPEREGEXP] [NAMEREGEXP]
These commands can now print only the searched entities
matching the provided regexp(s), giving a condition
on the entity names or entity types. The flag -q disables
printing headers or informations messages.
info functions
info types
info variables
rbreak
These commands now determine the syntax for the shown entities
according to the language chosen by `set language'. In particular,
`set language auto' means to automatically choose the language of
the shown entities.
thread apply [all | COUNT | -COUNT] [FLAG]... COMMAND
The 'thread apply' command accepts new FLAG arguments.
FLAG arguments allow to control what output to produce and how to handle
errors raised when applying COMMAND to a thread.
set tui tab-width NCHARS
show tui tab-width NCHARS
"set tui tab-width" replaces the "tabset" command, which has been
deprecated.
set style enabled [on|off]
show style enabled
Enable or disable terminal styling. Styling is enabled by default
on most hosts, but disabled by default when in batch mode.
set style sources [on|off]
show style sources
Enable or disable source code styling. Source code styling is
enabled by default, but only takes effect if styling in general is
enabled, and if GDB was linked with GNU Source Highlight.
set style filename foreground COLOR
set style filename background COLOR
set style filename intensity VALUE
Control the styling of file names.
set style function foreground COLOR
set style function background COLOR
set style function intensity VALUE
Control the styling of function names.
set style variable foreground COLOR
set style variable background COLOR
set style variable intensity VALUE
Control the styling of variable names.
set style address foreground COLOR
set style address background COLOR
set style address intensity VALUE
Control the styling of addresses.
}}}
* MI changes
{{{
** The '-data-disassemble' MI command now accepts an '-a' option to
disassemble the whole function surrounding the given program
counter value or function name. Support for this feature can be
verified by using the "-list-features" command, which should
contain "data-disassemble-a-option".
** Command responses and notifications that include a frame now include
the frame's architecture in a new "arch" attribute.
}}}
* Python API
{{{
** GDB no longer supports Python versions less than 2.6.
** The gdb.Inferior type has a new 'progspace' property, which is the
program
space associated to that inferior.
** The gdb.Progspace type has a new 'objfiles' method, which returns the
list
of objfiles associated to that program space.
** gdb.SYMBOL_LOC_COMMON_BLOCK, gdb.SYMBOL_MODULE_DOMAIN, and
gdb.SYMBOL_COMMON_BLOCK_DOMAIN were added to reflect changes to
the gdb core.
** gdb.SYMBOL_VARIABLES_DOMAIN, gdb.SYMBOL_FUNCTIONS_DOMAIN, and
gdb.SYMBOL_TYPES_DOMAIN are now deprecated. These were never
correct and did not work properly.
** The gdb.Value type has a new constructor, which is used to construct
a
gdb.Value from a Python buffer object and a gdb.Type.
}}}
* Configure changes
{{{
--enable-ubsan
Enable or disable the undefined behavior sanitizer. This is
disabled by default, but passing --enable-ubsan=yes or
--enable-ubsan=auto to configure will enable it. Enabling this can
cause a performance penalty. The undefined behavior sanitizer was
first introduced in GCC 4.9.
}}}
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