X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2FNEWS;h=3a7e704cc65780b402dcea57693d08e883136f67;hb=7c1618381fdaa0697a211721ac31844f884797ac;hp=81c21b82cc13af7f83aec1a26ac5404e3c305055;hpb=281c4447738409888d9659924937da182a65b4e1;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/NEWS b/gdb/NEWS index 81c21b82cc..3a7e704cc6 100644 --- a/gdb/NEWS +++ b/gdb/NEWS @@ -3,6 +3,20 @@ *** Changes since GDB 8.0 +* The 'ptype' command now accepts a '/o' flag, which prints the + offsets and sizes of fields in a struct, like the pahole(1) tool. + +* New "--readnever" command line option instructs GDB to not read each + symbol file's symbolic debug information. This makes startup faster + but at the expense of not being able to perform symbolic debugging. + This option is intended for use cases where symbolic debugging will + not be used, e.g., when you only need to dump the debuggee's core. + +* GDB now uses the GNU MPFR library, if available, to emulate target + floating-point arithmetic during expression evaluation when the target + uses different floating-point formats than the host. At least version + 3.1 of GNU MPFR is required. + * GDB now supports access to the guarded-storage-control registers and the software-based guarded-storage broadcast control registers on IBM z14. @@ -18,14 +32,106 @@ the remote inferior is started by the GDBserver, use the "unset environment" command. +* Completion improvements + + ** GDB can now complete function parameters in linespecs and + explicit locations without quoting. When setting breakpoints, + quoting around functions names to help with TAB-completion is + generally no longer necessary. For example, this now completes + correctly: + + (gdb) b function(in[TAB] + (gdb) b function(int) + + Related, GDB is no longer confused with completing functions in + C++ anonymous namespaces: + + (gdb) b (anon[TAB] + (gdb) b (anonymous namespace)::[TAB][TAB] + (anonymous namespace)::a_function() + (anonymous namespace)::b_function() + + ** GDB now has much improved linespec and explicit locations TAB + completion support, that better understands what you're + completing and offers better suggestions. For example, GDB no + longer offers data symbols as possible completions when you're + setting a breakpoint. + + ** GDB now TAB-completes label symbol names. + + ** The "complete" command now mimics TAB completion accurately. + +* New command line options (gcore) + +-a + Dump all memory mappings. + +* Breakpoints on C++ functions are now set on all scopes by default + + By default, breakpoints on functions/methods are now interpreted as + specifying all functions with the given name ignoring missing + leading scopes (namespaces and classes). + + For example, assuming a C++ program with symbols named: + + A::B::func() + B::func() + + both commands "break func()" and "break B::func()" set a breakpoint + on both symbols. + + You can use the new flag "-qualified" to override this. This makes + GDB interpret the specified function name as a complete + fully-qualified name instead. For example, using the same C++ + program, the "break -q B::func" command sets a breakpoint on + "B::func", only. A parameter has been added to the Python + gdb.Breakpoint constructor to achieve the same result when creating + a breakpoint from Python. + +* Breakpoints on functions marked with C++ ABI tags + + GDB can now set breakpoints on functions marked with C++ ABI tags + (e.g., [abi:cxx11]). See here for a description of ABI tags: + https://developers.redhat.com/blog/2015/02/05/gcc5-and-the-c11-abi/ + + Functions with a C++11 abi tag are demangled/displayed like this: + + function[abi:cxx11](int) + ^^^^^^^^^^^ + + You can now set a breakpoint on such functions simply as if they had + no tag, like: + + (gdb) b function(int) + + Or if you need to disambiguate between tags, like: + + (gdb) b function[abi:other_tag](int) + + Tab completion was adjusted accordingly as well. + * Python Scripting ** New events gdb.new_inferior, gdb.inferior_deleted, and gdb.new_thread are emitted. See the manual for further description of these. + ** A new command, "rbreak" has been added to the Python API. This + command allows the setting of a large number of breakpoints via a + regex pattern in Python. See the manual for further details. + + ** Python breakpoints can now accept explicit locations. See the + manual for a further description of this feature. + + * New features in the GDB remote stub, GDBserver + ** GDBserver is now able to start inferior processes with a + specified initial working directory. + + The user can set the desired working directory to be used from + GDB using the new "set cwd" command. + ** New "--selftest" command line option runs some GDBserver self tests. These self tests are disabled in releases. @@ -42,6 +148,14 @@ variables that are to be set or unset from GDB. These variables will affect the environment to be passed to the inferior. +* When catching an Ada exception raised with a message, GDB now prints + the message in the catchpoint hit notification. In GDB/MI mode, that + information is provided as an extra field named "exception-message" + in the *stopped notification. + +* Trait objects can now be inspected When debugging Rust code. This + requires compiler support which will appear in Rust 1.24. + * New remote packets QEnvironmentHexEncoded @@ -59,14 +173,24 @@ QEnvironmentReset QStartupWithShell Indicates whether the inferior must be started with a shell or not. +QSetWorkingDir + Tell GDBserver that the inferior to be started should use a specific + working directory. + * The "maintenance print c-tdesc" command now takes an optional argument which is the file name of XML target description. * The "maintenance selftest" command now takes an optional argument to filter the tests to be run. +* The "enable", and "disable" commands now accept a range of + breakpoint locations, e.g. "enable 1.3-5". + * New commands +set|show cwd + Set and show the current working directory for the inferior. + set|show compile-gcc Set and show compilation command used for compiling and injecting code with the 'compile' commands. @@ -75,12 +199,21 @@ set debug separate-debug-file show debug separate-debug-file Control the display of debug output about separate debug file search. +set dump-excluded-mappings +show dump-excluded-mappings + Control whether mappings marked with the VM_DONTDUMP flag should be + dumped when generating a core file. + maint info selftests List the registered selftests. starti Start the debugged program stopping at the first instruction. +set|show print type nested-type-limit + Set and show the limit of nesting level for nested types that the + type printer will show. + * TUI Single-Key mode now supports two new shortcut keys: `i' for stepi and `o' for nexti. @@ -113,10 +246,12 @@ starti * New native configurations FreeBSD/aarch64 aarch64*-*-freebsd* +FreeBSD/arm arm*-*-freebsd* * New targets FreeBSD/aarch64 aarch64*-*-freebsd* +FreeBSD/arm arm*-*-freebsd* * Removed targets and native configurations