Remove make_cleanup_defer_target_commit_resume

This removes make_cleanup_defer_target_commit_resume in favor of using
scoped_restore.

gdb/ChangeLog
2017-09-29  Tom Tromey  <tom@tromey.com>

* target.h (make_scoped_defer_target_commit_resume): Update.
* target.c (make_scoped_defer_target_commit_resume): Rename from
make_cleanup_defer_target_commit_resume.  Return a
scoped_restore.
* infrun.c (proceed): Use make_scoped_defer_target_commit_resume.

Remove some unused declarations

This removes a couple of unused cleanup-related declarations.

gdb/ChangeLog
2017-09-29  Tom Tromey  <tom@tromey.com>

* main.c (captured_main_1): Remove unused declaration.
* spu-multiarch.c (parse_spufs_run): Remove unused declaration.

Remove a cleanup from symtab.c

This removes an unused outer cleanup from symtab.c, and an unused
cleanup declaration as well.

gdb/ChangeLog
2017-09-29  Tom Tromey  <tom@tromey.com>

* symtab.c (search_symbols): Remove unused outer cleanup.
(make_source_files_completion_list): Remove unused declaration.

Remove cleanup from mt-tdep.c

Remove a cleanup from mt-tdep.c, using gdb::byte_vector.

gdb/ChangeLog
2017-09-29  Tom Tromey  <tom@tromey.com>

* mt-tdep.c (mt_push_dummy_call): Use gdb::byte_vector.

Remove cleanup from xstormy16-tdep.c

This removes a cleanup from xstormy16-tdep.c, using gdb::byte_vector.

gdb/ChangeLog
2017-09-29  Tom Tromey  <tom@tromey.com>

* xstormy16-tdep.c (xstormy16_push_dummy_call): Use
gdb::byte_vector.

Remove cleanup from complaints.c

This removes a cleanup from complaints.c by using std::string.

gdb/ChangeLog
2017-09-29  Tom Tromey  <tom@tromey.com>

* complaints.c (vcomplaint): Use std::string.

Remove some cleanups from tracepoint.c

This removes some cleanups from tracepoint.c by using std::string.  It
also removes some unused cleanup declarations.

gdb/ChangeLog
2017-09-29  Tom Tromey  <tom@tromey.com>

* tracepoint.c (trace_variable_command): Use std::string.
(encode_actions_1): Remove unused declarations.
(create_tsv_from_upload): Use std::string.

Remove cleanups from cp-support.c

This removes some cleanups from cp-support.c, using std::string.

gdb/ChangeLog
2017-09-29  Tom Tromey  <tom@tromey.com>

* cp-support.c (gdb_demangle): Use std::string.

Remove some cleanups from stack.c

This removes some cleanups from stack.c by using std::string or
gdb::unique_xmalloc_ptr.  One cleanup remains in this file; I did not
remove it here because it is handled in another patch series that has
yet to be resolved.

gdb/ChangeLog
2017-09-29  Tom Tromey  <tom@tromey.com>

* stack.c (parse_frame_specification): Use std::string
(info_frame_command): Use gdb::unique_xmalloc_ptr.

Remove cleanup from tilegx-tdep.c

This removes a cleanup from tilegx-tdep.c, by using gdb::byte_vector.

gdb/ChangeLog
2017-09-29  Tom Tromey  <tom@tromey.com>

* tilegx-tdep.c (tilegx_push_dummy_call): Use gdb::byte_vector.

Remove cleanups from utils.c

This removes a couple of cleanups from utils.c through the use of
std::string.

gdb/ChangeLog
2017-09-29  Tom Tromey  <tom@tromey.com>

* utils.c (vfprintf_maybe_filtered): Use std::string.
(vfprintf_unfiltered): Likewise.

Remove cleanup from display_gdb_prompt

This removes a cleanup from display_gdb_prompt by using std::string.

gdb/ChangeLog
2017-09-29  Tom Tromey  <tom@tromey.com>

* event-top.c (top_level_prompt): Return std::string.
(display_gdb_prompt): Update.

Introduce string_vprintf

This adds string_vprintf, a va_list variant of string_printf.  This
will be used in later patches.

gdb/ChangeLog
2017-09-29  Tom Tromey  <tom@tromey.com>

* unittests/common-utils-selftests.c (format): New function.
(string_vprintf_tests): New function.
(_initialize_common_utils_selftests): Register new tests.
* common/common-utils.c (string_vprintf): New function.
* common/common-utils.h (string_vprintf): Declare.

PR21978, objdump does not display line numbers in certain cases

Same line but different file ought to display file and line.

PR 21978
* objdump.c: Formatting.
(show_line): Reset prev_line when function name changes.

Automatic date update in version.in

Constify unpack_varlen_hex & fix fallout

I ran into non-const unpack_varlen_hex while working on something
else, and decided to just fix it first.  Ends up constifying a good
deal of remote packet parsing.

gdb/ChangeLog:
2017-09-29  Pedro Alves  <palves@redhat.com>

* common/rsp-low.c (unpack_varlen_hex): Constify.
* common/rsp-low.h (unpack_varlen_hex): Constify.
* linux-nat.c (linux_child_static_tracepoint_markers_by_strid):
Constify.
* remote.c (remote_set_permissions, read_ptid)
(remote_current_thread, remote_get_threads_with_qthreadinfo)
(remote_static_tracepoint_marker_at)
(remote_static_tracepoint_markers_by_strid)
(stop_reply_extract_thread, remote_parse_stop_reply): Constify.
* tracepoint.c (parse_trace_status, parse_tracepoint_status)
(parse_tracepoint_definition, parse_tsv_definition)
(parse_static_tracepoint_marker_definition): Constify.
* tracepoint.h (parse_static_tracepoint_marker_definition)
(parse_trace_status, parse_tracepoint_status)
(parse_tracepoint_definition, parse_tsv_definition): Constify.

gdb/gdbserver/ChangeLog:
2017-09-29  Pedro Alves  <palves@redhat.com>

* ax.c (gdb_parse_agent_expr): Constify.
* ax.h (gdb_parse_agent_expr): Constify.
* mem-break.c (add_breakpoint_condition, add_breakpoint_commands):
Constify.
* mem-break.h (add_breakpoint_condition, add_breakpoint_commands): Constify.
* remote-utils.c (hex_or_minus_one, read_ptid): Constify.
* remote-utils.h (read_ptid): Constify.
* server.c (handle_qxfer_exec_file, handle_query, handle_v_cont)
(process_point_options, process_serial_event): Constify.
* tracepoint.c (add_tracepoint_action, cmd_qtdp, cmd_qtdpsrc)
(cmd_qtdv, cmd_qtenable_disable, cmd_qtro, cmd_qtframe, cmd_qtp)
(cmd_qtbuffer): Constify.

gdb/remote.c: Eliminate target_buf/target_buf_size hack

This finally eliminates an old hack left in place when tracepoint RSP
support was migrated from tracepoint.c to remote.c, back in
35b1e5cca081 ("Make tracepoint operations go through target vector.")
over 7 years ago.

Tested on x86_64 GNU/Linux.

gdb/ChangeLog:
2017-09-29  Pedro Alves  <palves@redhat.com>

* remote.c (target_buf, target_buf_size): Delete.
(remote_get_noisy_reply): Remove buf_p and sizeof_buf parameters.
Use the connection's packet buffer instead.
All callers adjusted.
(_initialize_remote): Remove references to target_buf and
target_buf_size.

gdbserver/libthread_db: Don't ignore memory reading failures

If we had this in place before, then the regression fixed by the
previous commit would have been been visible is all test runs.  E.g.:

  Running src/gdb/testsuite/gdb.threads/multi-create-ns-info-thr.exp ...
  FAIL: gdb.threads/multi-create-ns-info-thr.exp: continue to breakpoint 6

Debugging manually we'd see this:
  gdbserver: Cannot get thread handle for LWP 1467: generic error

Instead of:
  gdbserver: PID mismatch!  Expected 27472, got 27471

which is misleading - gdbserver didn't 27471, that was stale stack
data from previous function invocations.

gdb/gdbserver/ChangeLog:
2017-09-29  Pedro Alves  <palves@redhat.com>

* proc-service.c (ps_pdread): Return PS_ERR if reading memory
fails.

Fix gdbserver regression exposed by gdb.threads/multi-create-ns-info-thr.exp

Commit 8629910955a7 ("Add thread_db_notice_clone to gdbserver")
introduced calls into libthread_db without making sure that the
current thread is pointing to a know-stopped thread.  This resulted in
sometimes thread_db_notice_clone failing->find_one_thread failing like
this, as seen when running gdb.threads/multi-create-ns-info-thr.exp:

~~~
  Thread <6> executing
  Thread <7> executing
  gdbserver: PID mismatch!  Expected 27472, got 27471
  gdbserver: Cannot find thread after clone.

  Thread <1000> executing
  Thread <1001> executing
~~~

Things go south from here and sometimes that ends up resulting in
gdbserver crashing and the test failing.

gdb/gdbserver/ChangeLog:
2017-09-29  Pedro Alves  <palves@redhat.com>

* linux-low.c (handle_extended_wait): Pass parent thread instead
of process to thread_db_notice_clone.
* linux-low.h (thread_db_notice_clone): Replace parent process
parameter with parent thread parameter.
* thread-db.c (find_one_thread): Add comment.
(thread_db_notice_clone): Replace parent process parameter with
parent thread parameter.  Temporarily switch to the parent thread.

Fail when string merge can't alloc memory

I was looking at Debian bug #874674 again today, and think I might
have spotted the problem.  It appears that merge.c tries to cope with
memory allocation failures in some circumstances, but doesn't quite
manage to get everything right.  This patch will make ld report memory
allocation failures instead of silently not merging strings.

* merge.c (merge_strings): Return FALSE on malloc failure.
(_bfd_merge_sections): Return failures from record_section and
merge_strings.

Automatic date update in version.in

Move utils-selftests.c -> gdb/unittests/

This file was only under gdb/ currently because it predates the
gdb/unittests/ directory.

gdb/ChangeLog:
2017-09-28  Pedro Alves  <palves@redhat.com>

* Makefile.in (SUBDIR_UNITTESTS_SRCS): Add
unittests/common-utils-selftests.c.
(SUBDIR_UNITTESTS_OBS): Add common-utils-selftests.o.
(COMMON_OBS): Remove utils-selftests.o.
* utils-selftests.c: Move to ...
* unittests/common-utils-selftests.c: ... here and rename self
test to "string_printf".

(open_and_init_dwp_file): Protect against some segvs

This is a "tiny patch", no assignment required.

2017-09-28  Alexander Shaposhnikov <alexander.v.shaposhnikov@gmail.com>

* dwarf2read.c (open_and_init_dwp_file): Protect against dwp_file
having NULL cus or tus.

Skip the PR 14918 linker test for ARM targets.

 I am applying a patch that has been lying around in the Fedora
  binutils sources for a while.  It skips the PR14918 linker test for
  ARM based targets.  This test checks that libgcc is not included in a
  link of an empty executable.  This works for most targets, but on the
  ARM the crt1.o startup code calls __libc_csu_init which is in
  /usr/lib/libc_nonshared.a(elf-init.oS).  This in turn needs
  __aeabi_unwind_cpp_pr0@@GCC_3.5 which is provided by libgcc_s.so.1,
  and so the test fails.

PR22220, BFD linker wrongly marks symbols as PREVAILING_DEF_IRONLY

non_ir_ref_dynamic wasn't being set in the case where we have a
versioned dynamic symbol definition with a non-versioned matching IR
symbol.

bfd/
PR 22220
* elflink.c (_bfd_elf_merge_symbol): Set non_ir_ref_dynamic in
a case where plugin_notice isn't called.
ld/
* testsuite/ld-plugin/pr22220.h,
* testsuite/ld-plugin/pr22220lib.cc,
* testsuite/ld-plugin/pr22220lib.ver,
* testsuite/ld-plugin/pr22220main.cc: New test.
* testsuite/ld-plugin/lto.exp: Run it.

Automatic date update in version.in

Complete tdep move to convert_typed_floating

Many tdep files need to perform conversions between two floating-point
types, usually when accessing FP registers.  Most targets now use the
convert_typed_floating helper routine to do so.  However, a small number
still use the old method of converting via a DOUBLEST.  Since we want
to get rid of DOUBLEST, these targets need to be moved to the new
method as well.

The main obstacle is that for convert_typed_floating we need an actual
*type*, not just a floatformat.

In arm-tdep.c, this is very straightforward, since there is already a
type using the ARM extended floatformat.

For sh-tdep.c and sh64-tdep.c, no such type already exists, so I've
added one to the gdbarch_tdep struct as done on other targets.

gdb/ChangeLog
2017-09-27  Ulrich Weigand  <uweigand@de.ibm.com>

* arm-tdep.c: (convert_from_extended): Remove.
(convert_to_extended): Likewise.
(arm_extract_return_value): Use convert_typed_floating.
(arm_store_return_value): Likewise.

* sh-tdep.h (struct gdbarch_tdep): Add sh_littlebyte_bigword_type.
* sh-tdep.c: Do not include "floatformat.h".
(sh_littlebyte_bigword_type): New function.
(sh_register_convert_to_virtual): Use convert_typed_floating.
(sh_register_convert_to_raw): Likewise.
* sh64-tdep.c: (struct gdbarch_tdep): Add sh_littlebyte_bigword_type.
(sh64_littlebyte_bigword_type): New function.
(sh64_extract_return_value): Use convert_typed_floating.
(sh64_register_convert_to_virtual): Likewise.
(sh64_register_convert_to_raw): Likewise.

Simplify floatformat_from_type

For historical reasons, the TYPE_FLOATFORMAT element is still set to hold
an array of two floatformat structs, one for big-endian and the other for
little-endian.  When accessing the element via floatformat_from_type,
the code would check the type's byte order and return the appropriate
floatformat.

However, these days this is quite unnecessary, since the type's byte order
is already known at the time the type is allocated and the floatformat is
installed into TYPE_FLOATFORMAT.  Therefore, we can just install the correct
version here.

Also, moves the (now trivially simple) floatformat_from_type accessor to
gdbtypes.{c,h}, since it doesn't really need to be in doublest.c now.

gdb/ChangeLog
2017-09-27  Ulrich Weigand  <uweigand@de.ibm.com>

* doublest.h (floatformat_from_type): Move to gdbtypes.h.
* doublest.c (floatformat_from_type): Move to gdbtypes.c.

* gdbtypes.h (union type_specific): Make field floatformat hold
just a single struct floatformat, not an array.
(floatformat_from_type): Move here.
* gdbtypes.c (floatformat_from_type): Move here.  Update to
changed TYPE_FLOATFORMAT definition.
(verify_floatformat): Update to changed TYPE_FLOATFORMAT.
(recursive_dump_type): Likewise.
(init_float_type): Install correct floatformat for byte order.
(arch_float_type): Likewise.

Make init_type/arch_type take a size in bits

This changes the interfaces to init_type and arch_type to take the
type length in bits as input (instead of as bytes).  The routines
assert that the length is a multiple of TARGET_CHAR_BIT.

For consistency, arch_flags_type is changed likewise, so that now
all type creation interfaces always use length in bits.

All callers are updated in the straightforward manner.

The assert actually found a bug in read_range_type, where the
init_integer_type routine was called with a wrong argument (probably
a bug introduced with the conversion to use init_integer_type).

gdb/ChangeLog
2017-09-27  Ulrich Weigand  <uweigand@de.ibm.com>

* gdbtypes.c (init_type): Change incoming argument from
length-in-bytes to length-in-bits.  Assert length is a
multiple of TARGET_CHAR_BITS.
(arch_type, arch_flags_type): Likewise.
(init_integer_type): Update call to init_type.
(init_character_type): Likewise.
(init_boolean_type): Likewise.
(init_float_type): Likewise.
(init_decfloat_type): Likewise.
(init_complex_type): Likewise.
(init_pointer_type): Likewise.
(objfile_type): Likewise.
(arch_integer_type): Update call to arch_type.
(arch_character_type): Likewise.
(arch_boolean_type): Likewise.
(arch_float_type): Likewise.
(arch_decfloat_type): Likewise.
(arch_complex_type): Likewise.
(arch_pointer_type): Likewise.
(gdbtypes_post_init): Likewise.

* dwarf2read.c (dwarf2_init_float_type): Update call to init_type.
(read_base_type): Likewise.
* mdebugread.c (basic_type): Likewise.
* stabsread.c (dbx_init_float_type): Likewise.
(rs6000_builtin_type): Likewise.
(read_range_type): Likewise.  Also, fix call to init_integer_type
with erroneous length argument.

* ada-lang.c (ada_language_arch_info): Update call to arch_type.
* d-lang.c (build_d_types): Likewise.
* f-lang.c (build_fortran_types): Likewise.
* go-lang.c (build_go_types): Likewise.
* opencl-lang.c (build_opencl_types): Likewise.
* jit.c (finalize_symtab): Likewise.
* gnu-v3-abi.c (build_gdb_vtable_type): Likewise.
(build_std_type_info_type): Likewise.
* target-descriptions.c (tdesc_gdb_type): Likewise.  Also,
update call to arch_flags_type.

* linux-tdep.c (linux_get_siginfo_type_with_fields): Update call to
arch_type.
* fbsd-tdep.c (fbsd_get_siginfo_type): Likewise.
* windows-tdep.c (windows_get_tlb_type): Likewise.

* avr-tdep.c (avr_gdbarch_init): Update call to arch_type.
* ft32-tdep.c (ft32_gdbarch_init): Likewise.
* m32c-tdep.c (make_types): Likewise.
* rl78-tdep.c (rl78_gdbarch_init): Likewise.
(rl78_psw_type): Update call to arch_flags_type.
* m68k-tdep.c (m68k_ps_type): Update call to arch_flags_type.
* rx-tdep.c (rx_psw_type): Likewise.
(rx_fpsw_type): Likewise.
* sparc-tdep.c (sparc_psr_type): Likewise.
(sparc_fsr_type): Likewise.
* sparc64-tdep.c (sparc64_pstate_type): Likewise.
(sparc64_ccr_type): Likewise.
(sparc64_fsr_type): Likewise.
(sparc64_fprs_type): Likewise.

Add support for the new names of the RISC-V fmv.x.s and fmv.s.x instructions, vis: fmv.x.w and fmv.w.x.

PR 22179
opcodes * riscv-opc.c (riscv_opcodes): Add fmv.x.w and fmv.w.x as the new
names for the fmv.x.s and fmv.s.x instructions respectively.

gas * testsuite/gas/riscv/fmv.x.s: New file: Tests the support for the
renamed fmv.x.s and fmv.s.x instructions.
* testsuite/gas/riscv/fmv.x.d: New file: Test driver.

Constify find_command

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* findcmd.c (find_command): Constify.

Constify some commands in ada-tasks.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* ada-tasks.c (task_command_1, task_command): Constify.

Constify some commands in symtab.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* symtab.c (maintenance_print_symbol_cache)
(maintenance_flush_symbol_cache)
(maintenance_print_symbol_cache_statistics): Constify.

Constify some commands in inferior.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* inferior.c (detach_inferior_command, kill_inferior_command)
(inferior_command): Constify.

Constify some commands in regcache.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* regcache.c (regcache_print, maintenance_print_registers)
(maintenance_print_raw_registers)
(maintenance_print_cooked_registers)
(maintenance_print_register_groups)
(maintenance_print_remote_registers): Constify.

Constify some commands in printcmd.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* printcmd.c (map_display_numbers, undisplay_command)
(enable_disable_display_command, enable_display_command)
(disable_display_command): Constify.

Constify some commands in breakpoint.c

This also makes delete_command static; but now I wonder if it is used
in Insight and should not be touched.

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* breakpoint.h (delete_command): Don't declare.
* breakpoint.c (delete_command, enable_once_command)
(enable_count_command, enable_delete_command, breakpoint_1)
(maintenance_info_breakpoints, stopin_command, stopat_command)
(delete_command, delete_trace_command, save_breakpoints)
(save_breakpoints_command, save_tracepoints_command): Constify.

Constify some commands in macrocmd.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* macrocmd.c (macro_expand_command, macro_expand_once_command)
(skip_ws, extract_identifier, macro_define_command)
(macro_undef_command, macro_list_command): Constify.

Constify some commands in infcmd.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* infcmd.c (environment_info, set_environment_command)
(unset_environment_command, path_info, info_proc_cmd_1)
(info_proc_cmd_mappings, info_proc_cmd_stat)
(info_proc_cmd_status, info_proc_cmd_cwd, info_proc_cmd_cmdline)
(info_proc_cmd_exe, info_proc_cmd_all): Constify.

Constify some commands in i386-tdep.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* i386-tdep.c (i386_mpx_info_bounds, i386_mpx_set_bounds):
Constify.

Constify add_symbol_file_from_memory_command

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* symfile-mem.c (add_symbol_file_from_memory_command): Constify.

Constify demangle_command

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* demangle.c (demangle_command): Constify.

Constify maintenance_info_program_spaces_command

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* progspace.c (maintenance_info_program_spaces_command):
Constify.

Constify some commands in compile.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* compile/compile.c (check_raw_argument, compile_file_command)
(compile_code_command, compile_print_command): Constify.

Constify maintenance_print_reggroups

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* reggroups.c (maintenance_print_reggroups): Constify.

Constify save_gdb_index_command

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* dwarf2read.c (save_gdb_index_command): Constify.

Constify info_probes_stap_command

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* stap-probe.c (info_probes_stap_command): Constify.

Constify unset_exec_wrapper_command

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* fork-child.c (unset_exec_wrapper_command): Constify.

Constify some commands in btrace.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* btrace.c (get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_info_btrace_cmd): Constify.

Constify delete_bookmark_command

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* reverse.c (delete_bookmark_command): Constify.

Constify some commands in remote.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* remote.c (set_memory_packet_size)
(set_memory_write_packet_size, show_memory_write_packet_size)
(set_memory_read_packet_size, show_memory_read_packet_size)
(compare_sections_command, packet_command, remote_put_command)
(remote_get_command, remote_delete_command): Constify.

Constify some commands in mips-tdep.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* mips-tdep.c (show_mipsfpu_command, set_mipsfpu_single_command)
(set_mipsfpu_double_command, set_mipsfpu_none_command)
(set_mipsfpu_auto_command): Constify.

Constify cd_command

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* cli/cli-cmds.h (cd_command): Constify.
* cli/cli-cmds.c (cd_command): Constify.

Constify some commands in thread.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* thread.c (thread_name_command, thread_find_command): Constify.

Constify some commands in probes.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* probe.c (enable_probes_command, disable_probes_command):
Constify.

Constify some commands in exec.c, plus symbol_file_command

Note that this commit also changes deprecated_file_changed_hook -- not
used in the tree, but Insight will require a (presumably minor)
change.

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* symfile.c (symbol_file_command): Constify.
* gdbcore.h (deprecated_file_changed_hook): Constify.
* exec.c (deprecated_file_changed_hook, exec_file_command)
(file_command): Constify.
* defs.h (symbol_file_command): Constify.

Constify some commands in remote-fileio.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* remote-fileio.c (set_system_call_allowed)
(show_system_call_allowed): Constify.

Constify some commands in tracepoint.c

In addition to the constification, this fixes a command-repeat bug.

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* tracepoint.c (delete_trace_variable_command)
(tfind_end_command, tfind_start_command, tfind_pc_command)
(tfind_tracepoint_command, tfind_line_command)
(tfind_range_command, tfind_outside_command): Constify.

Constify some commands in ax-gdb.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* ax-gdb.c (maint_agent_printf_command, agent_command)
(agent_eval_command): Constify.

Constify some linespec functions

This changes a few linespec functions to work on "const char *" and
then fixes up all the callers.  This allows further constification
elsewhere.

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* tracepoint.c (info_scope_command): Constify.
* python/python.c (gdbpy_decode_line): Constify.
* python/py-breakpoint.c (bppy_init): Constify.
* mi/mi-cmd-break.c (mi_cmd_break_insert_1): Constify.
* location.h: (new_linespec_location)
(string_to_event_location_basic, string_to_event_location):
Constify.
* location.c (new_linespec_location)
(string_to_event_location_basic, string_to_event_location):
Constify.
* linespec.h (decode_line_with_current_source)
(decode_line_with_last_displayed, linespec_lex_to_end): Constify.
* linespec.c (linespec_lex_to_end)
(decode_line_with_current_source)
(decode_line_with_last_displayed): Constify.
* guile/scm-breakpoint.c (gdbscm_register_breakpoint_x):
Constify.
* cli/cli-cmds.c (edit_command, list_command): Constify.
* breakpoint.h (until_break_command, watch_command_wrapper)
(awatch_command_wrapper, rwatch_command_wrapper)
(init_ada_exception_breakpoint): Constify.
* breakpoint.c (break_command_1, dprintf_command)
(break_range_command, watch_command_wrapper)
(rwatch_command_wrapper, awatch_command_wrapper)
(until_break_command, init_ada_exception_breakpoint)
(strace_marker_create_sals_from_location, trace_command)
(ftrace_command, strace_command, struct tracepoint): Constify.
* ax-gdb.c (agent_command_1): Constify.
* ada-lang.c (ada_exception_sal): Constify.

Constify some commands in record.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* record.c (cmd_record_delete, cmd_record_stop, cmd_record_save)
(cmd_record_goto_begin, cmd_record_goto_end, get_insn_number)
(get_context_size, no_chunk, get_insn_history_modifiers)
(cmd_record_insn_history, get_call_history_modifiers)
(cmd_record_call_history): Constify.

Constify some commands in source.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* source.c (show_substitute_path_command)
(unset_substitute_path_command, set_substitute_path_command):
Constify.

Constify commands maint.c, plus maintenance_print_type

In addition to the constification, this fixes a command-repeat bug.

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* typeprint.c (maintenance_print_type): Constify.
* maint.c (maintenance_dump_me, maintenance_demangle)
(maintenance_time_display, maintenance_info_sections)
(maintenance_print_statistics, maintenance_deprecate)
(maintenance_undeprecate): Constify.
(maintenance_do_deprecate): Constify.  Use std::string.
(maintenance_selftest): Constify.
* gdbtypes.h (maintenance_print_type): Constify.

Constify unwind_command

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* hppa-tdep.c (unwind_command): Constify.

Constify some commands in target-descriptions.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* target-descriptions.c (unset_tdesc_filename_cmd)
(maint_print_c_tdesc_cmd, maintenance_check_xml_descriptions):
Constify.

Constify maintenance_print_dummy_frames

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* dummy-frame.c (maintenance_print_dummy_frames): Constify.

Constify some commands in tui.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* tui/tui.c (tui_enable_command, tui_disable_command): Constify.

Constify tui_reg_command

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* tui/tui-regs.c (tui_reg_command): Constify.

Constify some commands in skip.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* skip.c (skip_file_command, skip_function_command)
(skip_enable_command, skip_disable_command, skip_delete_command):
Constify.

Constify some commands in record-btrace.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* record-btrace.c (cmd_record_btrace_bts_start)
(cmd_record_btrace_pt_start): Constify.

Constify some commands in symmisc.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* symmisc.c (maintenance_print_symbols)
(maintenance_print_msymbols, maintenance_print_objfiles)
(maintenance_info_symtabs, maintenance_check_symtabs)
(maintenance_expand_symtabs, maintenance_info_line_tables):
Constify.

Constify new_ui_command

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* top.c (new_ui_command): Constify.

Constify some commands in symfile.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* symfile.c (add_symbol_file_command)
(remove_symbol_file_command, list_overlays_command)
(map_overlay_command, unmap_overlay_command)
(overlay_auto_command, overlay_manual_command)
(overlay_off_command, overlay_load_command): Constify.

Constify some commands in spu-tdep.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* spu-tdep.c (info_spu_event_command, info_spu_signal_command)
(info_spu_mailbox_command, info_spu_dma_command)
(info_spu_proxydma_command): Constify.

Constify some commands in cli-logging.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* cli/cli-logging.c (set_logging_on, set_logging_off): Constify.

Constify user_defined_command

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* cli/cli-script.c (user_defined_command): Constify.

Constify commands in cli-dump.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* cli/cli-dump.c (dump_memory_command, dump_value_command)
(dump_srec_memory, dump_srec_value, dump_ihex_memory)
(dump_ihex_value, dump_verilog_memory, dump_verilog_value)
(dump_tekhex_memory, dump_tekhex_value, dump_binary_memory)
(dump_binary_value, append_binary_memory, append_binary_value):
Constify.
(struct dump_context) <func>: Constify.
(add_dump_command): Update.

Constify some commands in  cli-cmds.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* cli/cli-cmds.c (show_version, show_configuration)
(source_command, show_user): Constify.

Constify maintenance_print_target_stack

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* target.c (maintenance_print_target_stack): Constify.

Constify interpreter_exec_cmd

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* interps.c (interpreter_exec_cmd): Constify.

Constify cmd_record_full_restore

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* record-full.c (cmd_record_full_restore): Constify.

Constify some functions in memattr.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* memattr.c (enable_mem_command, disable_mem_command)
(delete_mem_command): Constify.

Constify show_convenience

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* value.c (show_convenience): Constify.

Constify core_file_command

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* gdbcore.h (core_file_command): Update.
* corefile.c (core_file_command): Constify.

Constify maintenance_print_user_registers

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* user-regs.c (maintenance_print_user_registers): Constify.

Constify maintenance_cplus_namespace

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* cp-namespace.c (maintenance_cplus_namespace): Constify.

Constify first_component_command

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* cp-support.c (first_component_command): Constify.

Constify some functions in psymtab.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* psymtab.c (maintenance_print_psymbols)
(maintenance_info_psymtabs, maintenance_check_psymtabs):
Constify.

Constify display_tib

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* windows-tdep.c (display_tib): Constify.

Constify two functions in linux-fork.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* linux-fork.c (delete_checkpoint_command)
(detach_checkpoint_command): Constify.

Constify two functions in cp-abi.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* cp-abi.c (set_cp_abi_cmd, show_cp_abi_cmd): Constify.

Constify dump_arc_instruction_command

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* arc-tdep.c (dump_arc_instruction_command): Constify.

Constify two functions in valprint.c

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* valprint.c (set_radix, show_radix): Constify.

Constify info_probes_dtrace_command

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* dtrace-probe.c (info_probes_dtrace_command): Constify.

Constify not_just_help_class_command

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* command.h (not_just_help_class_command): Update.
* cli/cli-decode.h (not_just_help_class_command): Update.
* cli/cli-decode.c (not_just_help_class_command): Constify.

Constify add_cmd gdb_bfd.c

This constifies a command function in gdb_bfd.c.

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* gdb_bfd.c (maintenance_info_bfds): Constify.

Add add_cmd function overloads

This adds two add_cmd overloads: one whose callback takes a const char *,
and one that doesn't accept a function at all.  The no-function overload
was introduced to avoid ambiguity when NULL was passed as the function.

Long term the goal is for all commands to take const arguments, and
for the non-const variants to be removed entirely.

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* cli/cli-decode.c (add_cmd, set_cmd_cfunc): New function
overloads.
(do_add_cmd): Rename from add_cmd.  Don't call set_cmd_cfunc.
(do_const_cfunc): New function.
(cmd_cfunc_eq): New overload.
(cli_user_command_p): Check do_const_cfunc.
* cli/cli-decode.h (struct cmd_list_element) <function>: New field
const_cfunc.
* command.h (add_cmd): Add const overload and no-function
overload.
(set_cmd_cfunc): Add const overload.
(cmd_const_cfunc_ftype): Declare.
(cmd_cfunc_eq): Add const overload.
* breakpoint.c, cli-cmds.c, cli-dump.c, guile/scm-cmd.c,
python/py-cmd.c, target.c, tracepoint.c: Use no-function add_cmd
overload.

Add support for __VA_OPT__

C++2a adds a "__VA_OPT__" feature that can be used to control the
pesky "," emission when the final (variable) argument of a variadic
macro is empty.  This patch implements this feature for gdb.  (A patch
to implement it for gcc is pending.)

gdb/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* macroexp.c (get_next_token_for_substitution): New function.
(substitute_args): Call it.  Check for __VA_OPT__.

gdb/testsuite/ChangeLog
2017-09-27  Tom Tromey  <tom@tromey.com>

* gdb.base/macscp.exp: Add __VA_OPT__ tests.

Prevent an infinite loop in the DWARF parsing code when encountering a CU structure with a small negative size.

PR 22219
* dwarf.c (process_debug_info): Add a check for a negative
cu_length field.

PR22216, infinite loop in readelf process_symbol_table

This should make readelf bombproof given a fuzzed DT_HASH.  Also
removes a bogus check that would have resulted in wrong histograms.

PR 22216
* readelf.c (process_symbol_table): Check that DT_HASH symbol
chains are only visited once, and report an error if not.  Display
invalid symbol index if chain is out of range.  Use the same logic
when calculating histograms rather than the PR 17531 fix.  Delete
bogus check that chained index is less than number of buckets.