Record GDB 7.6 branch creation. Bump version number to 7.6.50.20130312-cvs.
Update NEWS file following GDB 7.6 branch creation.

gdb/ChangeLog:

        * NEWS: Create a new section for the next release branch.
        Rename the section of the current branch, now that it has
        been cut.
daily update
*** empty log message ***
gdb/testsuite/
2013-03-13  Yao Qi  <yao@codesourcery.com>

	* gdb.trace/tsv.exp: Remove code unrelated to testing TSV.
	Replace some "gdb_test" with "gdb_test_no_output".
	* tracepoint.c (tfile_get_trace_state_variable_value): Look for
	the last matched 'V' blcok in trace frame.

gdb/gdbserver:

	* tracepoint.c (traceframe_read_tsv): Look for the last matched
	'V' block in trace frame.

gdb/testsuite:

	* gdb.trace/tsv.exp (check_tsv): New.
	(top level): Save a tfile on current trace session. Call
	check_tsv on live target.  Load the tfile with target tfile
	and call check_tsv again.
More invalid pointer to pointer conversions.

As a follow up to:

  http://sourceware.org/ml/gdb-patches/2013-03/msg00449.html

In a nutshell, casts between 'char **' <-> 'unsigned char **' and
'char **' <-> 'const char **' are invalid.

I grepped for "\*\*) &" and found these.  There's another one in
demangle.c, but I've split fixing that one to a separate patch.

I think the ada_decode_symbol change is perhaps the one that could be
surprising.  The function's description has this comment, which makes
things much clearer:

   The GSYMBOL parameter is "mutable" in the C++ sense: logically
   const, but nevertheless modified to a semantically equivalent form
   when a decoded name is cached in it.  */

 const char *
 ada_decode_symbol (const struct general_symbol_info *gsymbol)

With that out of the way, I think the patch ends up being pretty
obvious.

Tested on x86_64 Fedora 17.

gdb/
2013-03-13  Pedro Alves  <palves@redhat.com>

	* ada-lang.c (ada_decode_symbol): Cast away constness of GSYMBOL
	rather than casting 'const char * const *' to 'const char **'.
	* ada-lex.l (processInt): Make "trailer" local const.  Remove
	'const char **' cast.
	* arm-linux-tdep.c (arm_stap_parse_special_token): Add 'char *'
	locals, and use those as strtol output pointer, instead than doing
	invalid casts to from 'const char **' to 'char **'.
	(_initialize_demangle): Remove cast.
	* i386-tdep.c (i386_stap_parse_special_token): : Add 'char *'
	locals, and use those as strtol output pointer, instead than doing
	invalid casts to from 'const char **' to 'char **'.
	* solib-dsbt.c (dsbt_get_initial_loadmaps): Remove 'gdb_byte**'
	casts.
	* stap-probe.c (stap_parse_register_operand)
	(stap_parse_single_operand): Likewise.
	* gdb.texinfo (Maintenance Commands): Add missing ')' for
	"maint agent" reference to Dynamic printf.
Constify strings in tracepoint.c, lookup_cmd and the completers.

This is sort of a continuation of Keith's parse_exp_1 constification
patch.  It started out by undoing these bits:

  @@ -754,9 +754,12 @@ validate_actionline (char **line, struct
   	  tmp_p = p;
   	  for (loc = t->base.loc; loc; loc = loc->next)
   	    {
  -	      p = tmp_p;
  -	      exp = parse_exp_1 (&p, loc->address,
  +	      const char *q;
  +
  +	      q = tmp_p;
  +	      exp = parse_exp_1 (&q, loc->address,
   				 block_for_pc (loc->address), 1);
  +	      p = (char *) q;

and progressively making more things const upwards, fixing fallout,
rinse repeat, until GDB built again (--enable-targets=all).

That ended up constifying lookup_cmd/add_cmd and (lots of) friends,
and the completers.

I didn't try to constify the command hooks themselves, because I know
upfront there are commands that write to the command string argument,
and I think I managed to stop at a nice non-hacky split point already.

I think the only non-really-super-obvious changes are
tracepoint.c:validate_actionline, and tracepoint.c:trace_dump_actions.

The rest is just mostly about 'char *' => 'const char *', 'char **'=>
'const char **', and the occasional (e.g., deprecated_cmd_warning)
case of 'char **'=> 'const char *', where/when I noticed that nothing
actually cares about the pointer to pointer output.

Tested on x86_64 Fedora 17, native and gdbserver.

gdb/
2013-03-13  Pedro Alves  <palves@redhat.com>

	* ada-lang.c (struct add_partial_datum) <text, text0, word>: Make
	fields const.
	(ada_make_symbol_completion_list): Make "text0" parameter const.
	* ax-gdb.c (agent_eval_command_one): Make "exp" parameter const.
	* breakpoint.c (condition_completer): Make "text" and "word"
	parameters const.  Adjust.
	(check_tracepoint_command): Adjust to validate_actionline
	prototype change.
	(catch_syscall_completer): Make "text" and "word" parameters
	const.
	* cli/cli-cmds.c (show_user): Make "comname" local const.
	(valid_command_p): Make "command" parameter const.
	(alias_command): Make "alias_prefix" and "command_prefix" locals
	const.
	* cli/cli-decode.c (add_cmd): Make "name" parameter const.
	(add_alias_cmd): Make "name" and "oldname" parameters const.
	Adjust.  No longer make copy of OLDNAME.
	(add_prefix_cmd, add_abbrev_prefix_cmd, add_set_or_show_cmd)
	(add_setshow_cmd_full, add_setshow_enum_cmd)
	(add_setshow_auto_boolean_cmd, add_setshow_boolean_cmd)
	(add_setshow_filename_cmd, add_setshow_string_cmd)
	(add_setshow_string_noescape_cmd)
	(add_setshow_optional_filename_cmd, add_setshow_integer_cmd)
	(add_setshow_uinteger_cmd, add_setshow_zinteger_cmd)
	(add_setshow_zuinteger_unlimited_cmd, add_setshow_zuinteger_cmd)
	(delete_cmd, add_info, add_info_alias, add_com, add_com_alias):
	Make "name" parameter const.
	(help_cmd): Rename "command" parameter to "arg".  New const local
	"command".
	(find_cmd): Make "command" parameter const.
	(lookup_cmd_1): Make "text" parameter pointer to const.  Adjust to
	deprecated_cmd_warning prototype change.
	(undef_cmd_error): Make "cmdtype" parameter const.
	(lookup_cmd): Make "line" parameter const.
	(deprecated_cmd_warning): Change type of "text" parameter to
	pointer to const char, from pointer to pointer to char.  Adjust.
	(lookup_cmd_composition): Make "text" parameter const.
	(complete_on_cmdlist, complete_on_enum): Make "text" and "word"
	parameters const.
	* cli/cli-decode.h (struct cmd_list_element) <name>: Make field
	const.
	* cli/cli-script.c (validate_comname): Make "tem" local const.
	(define_command): New const local "tem_c".  Use it in calls to
	lookup_cmd.
	(document_command): Make "tem" and "comfull" locals const.
	(show_user_1): Make "prefix" and "name" parameters const.
	* cli-script.h (show_user_1): Make "prefix" and "name" parameters
	const.
	* command.h (add_cmd, add_alias_cmd, add_prefix_cmd)
	(add_abbrev_prefix_cmd, completer_ftype, lookup_cmd, lookup_cmd_1)
	(deprecated_cmd_warning, lookup_cmd_composition, add_com)
	(add_com_alias, add_info, add_info_alias, complete_on_cmdlist)
	(complete_on_enum, add_setshow_enum_cmd)
	(add_setshow_auto_boolean_cmd, add_setshow_boolean_cmd)
	(add_setshow_filename_cmd, add_setshow_string_cmd)
	(add_setshow_string_noescape_cmd)
	(add_setshow_optional_filename_cmd, add_setshow_integer_cmd)
	(add_setshow_uinteger_cmd, add_setshow_zinteger_cmd)
	(add_setshow_zuinteger_cmd, add_setshow_zuinteger_unlimited_cmd):
	Change prototypes, constifying strings.
	* completer.c (noop_completer, filename_completer): Make "text"
	and "prefix" parameters const.
	(location_completer, expression_completer)
	(complete_line_internal): Make "text" and "prefix" parameters
	const and adjust.
	(command_completer, signal_completer): Make "text" and "prefix"
	parameters const.
	* completer.h (noop_completer, filename_completer)
	(expression_completer, location_completer, command_completer)
	(signal_completer): Change prototypes.
	* corefile.c (complete_set_gnutarget): Make "text" and "word"
	parameters const.
	* cp-abi.c (cp_abi_completer): Likewise.
	* expression.h (parse_expression_for_completion): Change
	prototype.
	* f-lang.c (f_make_symbol_completion_list): Make "text" and "word"
	parameters const.
	* infcmd.c (_initialize_infcmd): Make "cmd_name" local const.
	* infrun.c (handle_completer): Make "text" and "word" parameters
	const.
	* interps.c (interpreter_completer): Make "text" and "word"
	parameters const.
	* language.h (struct language_defn)
	<la_make_symbol_completion_list>: Make "text" and "word"
	parameters const.
	* parse.c (parse_exp_1): Move const hack to parse_exp_in_context.
	(parse_exp_in_context): Rename to ...
	(parse_exp_in_context_1): ... this.
	(parse_exp_in_context): Reimplement, with const hack from
	parse_exp_1.
	(parse_expression_for_completion): Make "string" parameter const.
	* printcmd.c (decode_format): Make "string_ptr" parameter pointer
	to pointer to const char.  Adjust.
	(print_command_1): Make "exp" parameter const.
	(output_command): Rename to ...
	(output_command_const): ... this.  Make "exp" parameter const.
	(output_command): Reimplement.
	(x_command): Adjust.
	(display_command): Rename "exp" parameter to "arg".  New "exp"
	local, const version of "arg".
	* python/py-auto-load.c (gdbpy_initialize_auto_load): Make
	"cmd_name" local const.
	* python/py-cmd.c (cmdpy_destroyer): Cast const away in xfree
	call.
	(cmdpy_completer): Make "text" and "word" parameters const.
	(gdbpy_parse_command_name): Make "prefix_text2" local const.
	* python/py-param.c (add_setshow_generic): Make "tmp_name" local
	const.
	* remote.c (_initialize_remote): Make "cmd_name" local const.
	* symtab.c (language_search_unquoted_string): Make "text" and "p"
	parameters const.  Adjust.
	(completion_list_add_fields): Make "sym_text", "text" and "word"
	parameters const.
	(struct add_name_data) <sym_text, text, word>: Make fields const.
	(default_make_symbol_completion_list_break_on): Make "text" and
	"word" parameters const.  Adjust locals.
	(default_make_symbol_completion_list)
	(make_symbol_completion_list, make_symbol_completion_type)
	(make_symbol_completion_list_fn): Make "text" and "word"
	parameters const.
	(make_file_symbol_completion_list): Make "text", "word" and
	"srcfile" parameters const.  Adjust locals.
	(add_filename_to_list): Make "text" and "word" parameters const.
	(struct add_partial_filename_data) <text, word>: Make fields
	const.
	(make_source_files_completion_list): Make "text" and "word"
	parameters const.
	* symtab.h (default_make_symbol_completion_list_break_on)
	(default_make_symbol_completion_list, make_symbol_completion_list)
	(make_symbol_completion_type enum type_code)
	(make_symbol_completion_list_fn make_file_symbol_completion_list)
	(make_source_files_completion_list): Change prototype.
	* top.c (execute_command): Adjust to pass pointer to pointer to
	const char to lookup_cmd, and to deprecated_cmd_warning prototype
	change.
	(set_verbose): Make "cmdname" local const.
	* tracepoint.c (decode_agent_options): Make "exp" parameter const,
	and adjust.
	(validate_actionline): Make "line" parameter a pointer to const
	char, and adjust.
	(encode_actions_1): Make "action_exp" local const, and adjust.
	(encode_actions): Adjust.
	(replace_comma): Delete.
	(trace_dump_actions): Make "action_exp" and "next_comma" locals
	const, and adjust.  Don't frob the action string while splitting
	it at commas.  Instead, make a copy of each split substring in
	turn.
	(trace_dump_command): Adjust to validate_actionline prototype
	change.
	* tracepoint.h (decode_agent_options, decode_agent_options)
	(encode_actions, validate_actionline): Change prototypes.
	* valprint.h (output_command): Delete declaration.
	(output_command_const): Declare.
	* value.c (function_destroyer): Cast const away in xfree call.
Extraneous NULL in linux_target_ops when HAVE_LINUX_BTRACE not defined

This fixes the followin error when HAVE_LINUX_BTRACE is not defined:

    linux-low.c:5943: error: excess elements in struct initializer
    linux-low.c:5943: error: (near initialization for 'linux_target_ops')

gdb/gdbserver/ChangeLog:

        * linux-low.c (linux_target_ops) [!HAVE_LINUX_BTRACE]:
        Remove extraneous NULL element.
Fix completer.c FIXME, and invalid pointer to pointer conversion.

As mentioned in the previous patch, I grepped for "\*\*) &" and found
one hit in completer.c.

I was about to post a patch that simply made
current_demangling_style_string const, and cast away constness at the
xfree site.  However, looking deeper, it seem to be there's a lot of
dead code in the file.

First, all external callers of set_demangling_style are found in the
stabs reader, commented out for over 12 years:

  http://sourceware.org/ml/gdb-patches/2000-12/msg00214.html

I don't think it's likely we'll ever make the older mangling schemes
work for stabs.  If we do, we can rediscuss the approach then.

Then, set_demangling_command has special handling for unknown
demangling styles, but "set demangle-style" is an enum command, and
with those, the user can only specify a known enumeration value, by
design:

  (gdb) set demangle-style gangnam-style
  Undefined item: "gangnam-style".


This patch removes all that dead code, then makes
current_demangling_style_string point to an element of
demangling_style_names, as the FIXME suggests, and then makes
current_demangling_style_string, removing the need for the 'const char
**' cast.

gdb/
2013-03-13  Pedro Alves  <palves@redhat.com>

	* dbxread.c (read_ofile_symtab, process_one_symbol): Remove
	commented out code.
	* demangle.c (current_demangling_style_string): Make it const.
	(set_demangling_command): Assert the demangling style is known.
	Remove all handling of unknown styles.  Set
	'current_demangling_style_string' to an element of the
	demangling_style_names array.
	(set_demangling_style): Delete.
	(_initialize_demangler): Set current_demangling_style_string to the
	element of the demangling_style_names array that corresponds to
	the default demangling style.  Remove FIXME note.  Don't call
	set_demangling_style.
	* gdb-demangle.h (set_demangling_style): Remove declaration.
Make hppa-hpux-nat.c:hppa_hpux_save_state_offset static.

Dave reports:

> There is one small (...) issue that needs fixing:
>
> gcc -g -O2   -I. -I../../src/gdb -I../../src/gdb/common -I../../src/gdb/config -DLOCALEDIR="\"/opt/gnu64/share/locale\"" -DHAVE_CONFIG_H -I../../src/gdb/../include/opcode -I../../src/gdb/../opcodes/.. -I../../src/gdb/../readline/.. -I../bfd -I../../src/gdb/../bfd -I../../src/gdb/../include -I../libdecnumber -I../../src/gdb/../libdecnumber  -I../../src/gdb/gnulib/import -Ibuild-gnulib/import   -DTUI=1  -Wall -Wdeclaration-after-statement -Wpointer-arith -Wformat-nonliteral -Wno-pointer-sign -Wno-unused -Wunused-value -Wunused-function -Wno-switch -Wno-char-subscripts -Wmissing-prototypes -Wdeclaration-after-statement -Wempty-body -Werror -c -o hppa-hpux-nat.o -MT hppa-hpux-nat.o -MMD -MP -MF .deps/hppa-hpux-nat.Tpo ../../src/gdb/hppa-hpux-nat.c
> ../../src/gdb/hppa-hpux-nat.c:45:1: error: no previous prototype for 'hppa_hpux_save_state_offset' [-Werror=missing-prototypes]
> cc1: all warnings being treated as errors
>
> Believe the function should be static.

gdb/
2013-03-13  Pedro Alves  <palves@redhat.com>

	* hppa-hpux-nat.c (hppa_hpux_save_state_offset): Make static.
daily update
*** empty log message ***
gdb/
	* tracepoint.c (trace_file_writer_xfree): New.
	(struct tfile_writer_data): New.
	(tfile_dtor, tfile_can_target_save, tfile_start): New.
	(tfile_write_header, tfile_write_regblock_type): New.
	(tfile_write_status, tfile_write_uploaded_tsv): New.
	(tfile_write_uploaded_tp, tfile_write_definition_end): New.
	(tfile_write_raw_data, (tfile_end): New.
	(tfile_write_ops): New global variable.
	(TRACE_WRITE_R_BLOCK): New macro.
	(TRACE_WRITE_M_BLOCK_HEADER): New macro.
	(TRACE_WRITE_M_BLOCK_MEMORY): New macro.
	(TRACE_WRITE_V_BLOCK): New macro.
	(trace_save): Add extra one parameter WRITER.  Make it static.
	Use WRITER to writer trace.
	(tfile_trace_file_writer_new): New.
	(trace_save_command): Caller update.
	(trace_save_tfile): Write trace data in TFILE format.
	* tracepoint.h (struct trace_frame_write_ops): New.
	(struct trace_file_write_ops): New.
	(struct trace_file_writer): New.
	(trace_save): Remove its declaration.
	(trace_save_tfile): Declare it.
	* mi/mi-main.c (mi_cmd_trace_save): Call trace_save_tfile
	instead of trace_save.
gdb/
2013-03-14  Hui Zhu  <hui@codesourcery.com>
	    Yao Qi  <yao@codesourcery.com>

	* Makefile.in (REMOTE_OBS): Add ctf.o.
	(SFILES): Add ctf.c.
	(HFILES_NO_SRCDIR): Add ctf.h.
	* ctf.c, ctf.h: New files.
	* tracepoint.c: Include 'ctf.h'.
	(collect_pseudocommand): Remove static.
	(trace_save_command): Parse option "-ctf".
	Produce different trace file writers per option.
	Adjust output message.
	(trace_save_tfile, trace_save_ctf): New.
	* tracepoint.h (trace_save_tfile, trace_save_ctf): Declare.
	* mi/mi-main.c: Include 'ctf.h'.
	(mi_cmd_trace_save): Handle option '-ctf'.  Call either
	trace_save_tfile or trace_save_ctf.
	* NEWS: Mention these changes.

gdb/doc/
2013-03-14  Hui Zhu  <hui@codesourcery.com>
	    Yao Qi  <yao@codesourcery.com>

	* gdb.texinfo (Trace Files): Add "tsave -ctf".
gdb/
	* tracepoint.c (tfile_write_status): Write trace notes and user
	name into tfile if they are not NULL.
gdb/
	* tracepoint.c (tfile_write_status): Write 'stop_desc' of trace
	status to tfile if trace is stopped by command 'tstop'.
gdb/testsuite/
	* gdb.trace/tstatus.exp (run_trace_experiment): Save the output
	of 'tstatus' into tstatus_output.
	(top level): Save the trace data to tfile.  Read trace file in
	tfile target.  Check the trace status.
From: Sergio Durigan Junior <sergiodj@redhat.com>
Subject: [PATCH] Fix for PR c++/15203 and PR c++/15210
Date: Sat, 09 Mar 2013 02:50:49 -0300 (5 days, 4 hours, 57 minutes ago)
Message-ID: <m3a9qdnmti.fsf@redhat.com>

Hi,

This bug was reported internally at our Bugzilla, along with a proposed
fix.  After talking to Keith about it, he investigated and came up with
another patch needed to really fix the issue on CVS HEAD.

The first part of the fix is the patch to cp-namespace.c.  It handles
the case when we are accessing a static variable inside a function
(inside a class) by the full linespec (is it right, Keith?).  E.g.:

    class foo
    {
    public:
        int bar()
        {
            static int var = 0;
        }
    };

And then, printing the value of `var':

    (gdb) print 'foo::bar()::var'

GDB would fall in an internal_error:

    gdb/cp-namespace.c:816: internal-error: cp_lookup_nested_symbol called on a non-aggregate type.

This is because `cp_lookup_nested_symbol' is not handling the case when
TYPE_CODE is either _FUNC or _METHOD.  This patch fixes it by returning
NULL in this case.

The second part of the fix is the patch to elfread.c.  It is needed
because the BSF_GNU_UNIQUE flag was added to some symbols in
<http://sourceware.org/ml/binutils/2009-06/msg00016.html>.  Because of
that, (still) the command:

    (gdb) print 'foo::bar()::var'

where `var' is a static variable returns:

    "No symbol "foo::bar()::var" in current context."

So with the second patch applied the command finally DTRT:

    (gdb) print 'foo::bar()::var'
    $1 = 0

This may not be the ideal solution, according to Keith it would be good
to implement productions on c-exp.y in order to recognize
CLASS::FUNCTION::VARIABLE, but it is a solution which works with what we
have today.

I regtested it in Fedora 17 x86_64 with -m64 and -m32, including
gdbserver, without regressions.

gdb/:
2013-03-14  Keith Seitz  <keiths@redhat.com>
	    Alan Matsuoka  <alanm@redhat.com>

	PR c++/15203
	PR c++/15210
	* cp-namespace.c (cp_lookup_nested_symbol): Handle TYPE_CODE_FUNC and
	TYPE_CODE_METHOD.
	* elfread.c (elf_symtab_read): Handle BSF_GNU_UNIQUE for certain
	symbols.

gdb/testsuite/:
2013-03-14  Sergio Durigan Junior  <sergiodj@redhat.com>

	PR c++/15203
	PR c++/15210
	* gdb.cp/m-static.cc (keepalive_int): New function.
	(gnu_obj_1::method): New variable `sintvar', call `keepalive_int'.
	* gdb.cp/m-static.exp: New test for `sintvar'.