X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2FNEWS;h=b0da564c36bde288a7d8c1887275bcdeb097867c;hb=7fe550fc4986f19a766650a76551a4ff4985ef5c;hp=a07d32dc8fd88d2baef0a63bfee4119db6c66b34;hpb=60f98dde0ae5b9d8a59732a67c6ea0b272cc1615;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/NEWS b/gdb/NEWS index a07d32dc8f..b0da564c36 100644 --- a/gdb/NEWS +++ b/gdb/NEWS @@ -1,7 +1,93 @@ What has changed in GDB? (Organized release by release) -*** Changes since GDB 7.2 +*** Changes since GDB 7.3 + +* GDB has two new commands: "set remote hardware-watchpoint-length-limit" + and "show remote hardware-watchpoint-length-limit". These allows to + set or show the maximum length limit (in bytes) of a remote + target hardware watchpoint. + + This allows e.g. to use "unlimited" hardware watchpoints with the + gdbserver integrated in Valgrind version >= 3.7.0. Such Valgrind + watchpoints are slower than real hardware watchpoints but are + significantly faster than gdb software watchpoints. + +* Python scripting + + ** The "maint set python print-stack on|off" command has been + deprecated, and a new command: "set python print-stack on|off" has + replaced it. Additionally, the default for "print-stack" is now + "off". + + ** A prompt subsitution hook (prompt_hook) is now available to the + Python API. + +* libthread-db-search-path now supports two special values: $sdir and $pdir. + $sdir specifies the default system locations of shared libraries. + $pdir specifies the directory where the libpthread used by the application + lives. + + GDB no longer looks in $sdir and $pdir after it has searched the directories + mentioned in libthread-db-search-path. If you want to search those + directories, they must be specified in libthread-db-search-path. + The default value of libthread-db-search-path on GNU/Linux and Solaris + systems is now "$sdir:$pdir". + + $pdir is not supported by gdbserver, it is currently ignored. + $sdir is supported by gdbserver. + +* New configure option --with-iconv-bin. + When using the internationalization support like the one in the GNU C + library, GDB will invoke the "iconv" program to get a list of supported + character sets. If this program lives in a non-standard location, one can + use this option to specify where to find it. + +* When natively debugging programs on PowerPC BookE processors running + a Linux kernel version 2.6.34 or later, GDB supports masked hardware + watchpoints, which specify a mask in addition to an address to watch. + The mask specifies that some bits of an address (the bits which are + reset in the mask) should be ignored when matching the address accessed + by the inferior against the watchpoint address. See the "PowerPC Embedded" + section in the user manual for more details. + +* The new option --once causes GDBserver to stop listening for connections once + the first connection is made. The listening port used by GDBserver will + become available after that. + +* New commands "info macros", and "info definitions" have been added. + +* Changed commands + +watch EXPRESSION mask MASK_VALUE + The watch command now supports the mask argument which allows creation + of masked watchpoints, if the current architecture supports this feature. + +info auto-load-scripts [REGEXP] + This command was formerly named "maintenance print section-scripts". + It is now generally useful and is no longer a maintenance-only command. + +* Tracepoints can now be enabled and disabled at any time after a trace + experiment has been started using the standard "enable" and "disable" + commands. It is now possible to start a trace experiment with no enabled + tracepoints; GDB will display a warning, but will allow the experiment to + begin, assuming that tracepoints will be enabled as needed while the trace + is running. + +* New remote packets + +QTEnable + + Dynamically enable a tracepoint in a started trace experiment. + +QTDisable + + Dynamically disable a tracepoint in a started trace experiment. + +* Dcache size (number of lines) and line-size are now runtime-configurable + via "set dcache line" and "set dcache line-size" commands. + +*** Changes in GDB 7.3 * GDB has a new command: "thread find [REGEXP]". It finds the thread id whose name, target id, or thread extra info @@ -38,6 +124,25 @@ * Python scripting + ** The function gdb.Write now accepts an optional keyword 'stream'. + This keyword, when provided, will direct the output to either + stdout, stderr, or GDB's logging output. + + ** Parameters can now be be sub-classed in Python, and in particular + you may implement the get_set_doc and get_show_doc functions. + This improves how Parameter set/show documentation is processed + and allows for more dynamic content. + + ** Symbols, Symbol Table, Symbol Table and Line, Object Files, + Inferior, Inferior Thread, Blocks, and Block Iterator APIs now + have an is_valid method. + + ** Breakpoints can now be sub-classed in Python, and in particular + you may implement a 'stop' function that is executed each time + the inferior reaches that breakpoint. + + ** New function gdb.lookup_global_symbol looks up a global symbol. + ** GDB values in Python are now callable if the value represents a function. For example, if 'some_value' represents a function that takes two integer parameters and returns a value, you can call @@ -68,15 +173,7 @@ ** Python Support for Inferior events. Python scripts can add observers to be notified of events - occurring the in process being debugged. - The following events are currently supported: - - gdb.events.cont Continue event. - - gdb.events.exited Inferior exited event. - - gdb.events.stop Signal received, and Breakpoint hit events. - - ** Python Support for Inferior events. - Python scripts can add observers to be notified of events - occurring the in process being debugged. + occurring in the process being debugged. The following events are currently supported: - gdb.events.cont Continue event. - gdb.events.exited Inferior exited event. @@ -145,6 +242,12 @@ libthread_db library with the "set libthread-db-search-path" command. See the user manual for more details on this command. +* When natively debugging programs on PowerPC BookE processors running + a Linux kernel version 2.6.34 or later, GDB supports ranged breakpoints, + which stop execution of the inferior whenever it executes an instruction + at any address within the specified range. See the "PowerPC Embedded" + section in the user manual for more details. + * New features in the GDB remote stub, GDBserver ** GDBserver is now supported on PowerPC LynxOS (versions 4.x and 5.x), @@ -171,6 +274,8 @@ Analog Devices, Inc. Blackfin Processor bfin-* ** The --map-info flag lists all known core mappings. + ** CFI flashes may be simulated via the "cfi" device. + *** Changes in GDB 7.2 * Shared library support for remote targets by default