diff options
Diffstat (limited to 'gdb/NEWS')
| -rw-r--r-- | gdb/NEWS | 208 |
1 files changed, 207 insertions, 1 deletions
@@ -1,7 +1,69 @@ What has changed in GDB? (Organized release by release) -*** Changes since GDB 11 +*** Changes since GDB 12 + +* Support for Thread Local Storage (TLS) variables on FreeBSD arm and + aarch64 architectures. + +* GDB now supports hardware watchpoints on FreeBSD/Aarch64. + +* Remove support for building against Python 2, it is now only possible to + build GDB against Python 3. + +* DBX mode has been removed. + +* GDB now honours the DWARF prologue_end line-table entry flag the compiler can + emit to indicate where a breakpoint should be placed to break in a function + past its prologue. + +* New commands + +maintenance set ignore-prologue-end-flag on|off +maintenance show ignore-prologue-end-flag + This setting, which is off by default, controls whether GDB ignores the + PROLOGUE-END flag from the line-table when skipping prologue. This can be + used to force GDB to use prologue analyzers if the line-table is constructed + from erroneous debug information. + +* Changed commands + +maintenance info line-table + Add a PROLOGUE-END column to the output which indicates that an + entry corresponds to an address where a breakpoint should be placed + to be at the first instruction past a function's prologue. + +* Python API + + ** New function gdb.format_address(ADDRESS, PROGSPACE, ARCHITECTURE), + that formats ADDRESS as 'address <symbol+offset>', where symbol is + looked up in PROGSPACE, and ARCHITECTURE is used to format address. + This is the same format that GDB uses when printing address, symbol, + and offset information from the disassembler. + +*** Changes in GDB 12 + +* DBX mode is deprecated, and will be removed in GDB 13 + +* GDB 12 is the last release of GDB that will support building against + Python 2. From GDB 13, it will only be possible to build GDB itself + with Python 3 support. + +* Improved C++ template support + + GDB now treats functions/types involving C++ templates like it does function + overloads. Users may omit parameter lists to set breakpoints on families of + template functions, including types/functions composed of multiple template types: + + (gdb) break template_func(template_1, int) + + The above will set breakpoints at every function `template_func' where + the first function parameter is any template type named `template_1' and + the second function parameter is `int'. + + TAB completion also gains similar improvements. + +* The FreeBSD native target now supports async mode. * Configure changes @@ -64,8 +126,69 @@ set debug threads on|off show debug threads Print additional debug messages about thread creation and deletion. +set debug linux-nat on|off +show debug linux-nat + These new commands replaced the old 'set debug lin-lwp' and 'show + debug lin-lwp' respectively. Turning this setting on prints debug + messages relating to GDB's handling of native Linux inferiors. + +maint flush source-cache + Flush the contents of the source code cache. + +maint set gnu-source-highlight enabled on|off +maint show gnu-source-highlight enabled + Whether GDB should use the GNU Source Highlight library for adding + styling to source code. When off, the library will not be used, even + when available. When GNU Source Highlight isn't used, or can't add + styling to a particular source file, then the Python Pygments + library will be used instead. + +set suppress-cli-notifications (on|off) +show suppress-cli-notifications + This controls whether printing the notifications is suppressed for CLI. + CLI notifications occur when you change the selected context + (i.e., the current inferior, thread and/or the frame), or when + the program being debugged stops (e.g., because of hitting a + breakpoint, completing source-stepping, an interrupt, etc.). + +set style disassembler enabled on|off +show style disassembler enabled + If GDB is compiled with Python support, and the Python Pygments + package is available, then, when this setting is on, disassembler + output will have styling applied. + +set ada source-charset +show ada source-charset + Set the character set encoding that is assumed for Ada symbols. Valid + values for this follow the values that can be passed to the GNAT + compiler via the '-gnati' option. The default is ISO-8859-1. + +tui layout +tui focus +tui refresh +tui window height + These are the new names for the old 'layout', 'focus', 'refresh', + and 'winheight' tui commands respectively. The old names still + exist as aliases to these new commands. + +tui window width +winwidth + The new command 'tui window width', and the alias 'winwidth' allow + the width of a tui window to be adjusted when windows are laid out + in horizontal mode. + +set debug tui on|off +show debug tui + Control the display of debug output about GDB's tui. + * Changed commands +print + Printing of floating-point values with base-modifying formats like + /x has been changed to display the underlying bytes of the value in + the desired base. This was GDB's documented behavior, but was never + implemented correctly. + maint packet This command can now print a reply, if the reply includes non-printable characters. Any non-printable characters are printed @@ -79,6 +202,49 @@ clone-inferior environment' or 'unset environment' commands are also copied to the new inferior. +set debug lin-lwp on|off +show debug lin-lwp + These commands have been removed from GDB. The new command 'set + debug linux-nat' and 'show debug linux-nat' should be used + instead. + +info win + This command now includes information about the width of the tui + windows in its output. + +layout +focus +refresh +winheight + These commands are now aliases for the 'tui layout', 'tui focus', + 'tui refresh', and 'tui window height' commands respectively. + +* GDB's Ada parser now supports an extension for specifying the exact + byte contents of a floating-point literal. This can be useful for + setting floating-point registers to a precise value without loss of + precision. The syntax is an extension of the based literal syntax. + Use, e.g., "16lf#0123abcd#" -- the number of "l"s controls the width + of the floating-point type, and the "f" is the marker for floating + point. + +* MI changes + + ** The '-add-inferior' with no option flags now inherits the + connection of the current inferior, this restores the behaviour of + GDB as it was prior to GDB 10. + + ** The '-add-inferior' command now accepts a '--no-connection' + option, which causes the new inferior to start without a + connection. + +* New targets + +GNU/Linux/LoongArch loongarch*-*-linux* + +* Removed targets + +S+core score-*-* + * Python API ** New function gdb.add_history(), which takes a gdb.Value object @@ -86,6 +252,9 @@ clone-inferior integer, the index of the new item in the history list, is returned. + ** New function gdb.history_count(), which returns the number of + values in GDB's value history. + ** New gdb.events.gdb_exiting event. This event is called with a gdb.GdbExitingEvent object which has the read-only attribute 'exit_code', which contains the value of the GDB exit code. This @@ -120,6 +289,38 @@ clone-inferior is equivalent to the existing 'maint packet' CLI command; it allows a user specified packet to be sent to the remote target. + ** New function gdb.host_charset(), returns a string, which is the + name of the current host charset. + + ** New gdb.set_parameter(NAME, VALUE). This sets the gdb parameter + NAME to VALUE. + + ** New gdb.with_parameter(NAME, VALUE). This returns a context + manager that temporarily sets the gdb parameter NAME to VALUE, + then resets it when the context is exited. + + ** The gdb.Value.format_string method now takes a 'styling' + argument, which is a boolean. When true, the returned string can + include escape sequences to apply styling. The styling will only + be present if styling is otherwise turned on in GDB (see 'help + set styling'). When false, which is the default if the argument + is not given, then no styling is applied to the returned string. + + ** New read-only attribute gdb.InferiorThread.details, which is + either a string, containing additional, target specific thread + state information, or None, if there is no such additional + information. + + ** New read-only attribute gdb.Type.is_scalar, which is True for + scalar types, and False for all other types. + + ** New read-only attribute gdb.Type.is_signed. This attribute + should only be read when Type.is_scalar is True, and will be True + for signed types, and False for all other types. Attempting to + read this attribute for non-scalar types will raise a ValueError. + + ** It is now possible to add GDB/MI commands implemented in Python. + * New features in the GDB remote stub, GDBserver ** GDBserver is now supported on OpenRISC GNU/Linux. @@ -5016,6 +5217,11 @@ show arm force-mode the current CPSR value for instructions without symbols; previous versions of GDB behaved as if "set arm fallback-mode arm". +set arm unwind-secure-frames + Enable unwinding from Non-secure to Secure mode on Cortex-M with + Security extension. + This can trigger security exceptions when unwinding exception stacks. + set disable-randomization show disable-randomization Standalone programs run with the virtual address space randomization enabled |