binutils_os216

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Move frame_id_build_unavailable_stack static

frame_id_build_unavailable_stack is only used in frame.c, so make it static.

gdb:

2017-07-28 Yao Qi <yao.qi@linaro.org>

* frame.c (frame_id_build_unavailable_stack): Move it up.
* frame.h (frame_id_build_unavailable_stack): Remove the declaration.

Throw exceptions from rs6000 unwinder

gdb:

2017-07-21 Yao Qi <yao.qi@linaro.org>

* rs6000-tdep.c (struct rs6000_frame_cache) <base_p>: Remove.
(rs6000_frame_cache): Don't catch exceptions.
(rs6000_frame_this_id): Don't check info->base_p.
(rs6000_epilogue_frame_this_id): Likewise.

Throw exception in aarch64 unwinder

gdb:

2017-07-31 Yao Qi <yao.qi@linaro.org>

* aarch64-tdep.c (aarch64_prologue_cache) <available_p>: Remove.
(aarch64_make_prologue_cache_1): Update.
(aarch64_make_prologue_cache): Don't catch exception.
(aarch64_prologue_frame_unwind_stop_reason): Don't check
cache->available_p.
(aarch64_prologue_this_id): Likewise.
(aarch64_make_stub_cache): Don't catch exceptions.
(aarch64_stub_frame_unwind_stop_reason): Don't check
cache->available_p.
(aarch64_stub_this_id): Likewise.

Throw exception in i386 unwinders

This patch changes i386 unwinders not to throw exceptions.

gdb:

2017-07-31 Yao Qi <yao.qi@linaro.org>

* i386-tdep.c (i386_frame_cache) <base_p>: Remove.
(i386_alloc_frame_cache): Update.
(i386_frame_cache_1): Likewise.
(i386_frame_cache): Don't catch exceptions.
(i386_frame_this_id): Don't check cache->base_p.
(i386_frame_unwind_stop_reason): Likewise.
(i386_epilogue_frame_cache): Don't catch exceptions.
(i386_epilogue_frame_unwind_stop_reason): Don't check
cache->base_p.
(i386_epilogue_frame_this_id): Likewise.
(i386_sigtramp_frame_cache): Don't catch exceptions.
(i386_sigtramp_frame_unwind_stop_reason): Don't check
cache->base_p.
(i386_sigtramp_frame_this_id): Likewise.

Throw exception in amd64 unwinders

This patch changes amd64 unwinders not to throw exceptions.

gdb:

2017-07-31 Yao Qi <yao.qi@linaro.org>

* amd64-tdep.c (amd64_frame_cache) <base_p>: Remove.
(amd64_init_frame_cache): Update.
(amd64_frame_cache_1): Update.
(amd64_frame_unwind_stop_reason): Don't check cache->base_p.
(amd64_frame_this_id): Likewise.
(amd64_sigtramp_frame_cache): Don't catch exception.
(amd64_sigtramp_frame_unwind_stop_reason): Don't check
cache->base_p.
(amd64_sigtramp_frame_this_id): Likewise.
(amd64_epilogue_frame_cache): Don't catch exception.
(amd64_epilogue_frame_unwind_stop_reason): Don't check
cache->base_p.
(amd64_epilogue_frame_this_id): Likewise.

Throw exception in dwarf2 unwinders

This patch changes dwarf2 unwinders to not catch exceptions.

gdb:

2017-07-20 Yao Qi <yao.qi@linaro.org>

* dwarf2-frame.c (struct dwarf2_frame_cache) <unavailable_retaddr>:
Remove.
(dwarf2_frame_cache): Don't catch exception.
(dwarf2_frame_unwind_stop_reason): Don't check
cache->unavailable_retaddr.
(dwarf2_frame_this_id): Likewise.

Handle unwinding exceptions

unwinder methods (sniffer, this_id, stop_reason, etc) can throw
exceptions, at least when some data is unavailable during examining
traceframes. We deal with this problem by catching exceptions in each
unwinders, dwarf unwinders and different arch-specific prologue unwinders.
done by https://www.sourceware.org/ml/gdb-patches/2011-02/msg00611.html
This requires each arch-specific prologue unwinder needs to catch
exceptions.

This patch centralizes the exception handling in the callers of unwinders
methods, and the following patches remove the exception handling in each
arch prologue unwinders. This patch is a follow-up to discussion
https://sourceware.org/ml/gdb-patches/2016-02/msg00778.html

This patch not only catches exceptions from unwinder methods, but also
catches exceptions from frame_base methods, because they call
arch-specific prologue analyzer, which can throw exceptions.

gdb:

2017-07-27 Yao Qi <yao.qi@linaro.org>

* frame.c (compute_frame_id): Catch exception, if it is
NOT_AVAILABLE_ERROR, call frame_id_build_unavailable_stack,
otherwise throw the exception again.
(frame_unwind_register_value): Catch exception from
unwind->prev_register, if it is NOT_AVAILABLE_ERROR, set value
unavailable, otherwise throw the exception again.
(get_prev_frame_always_1): Catch exception from
unwind->stop_reason, if it is NOT_AVAILABLE_ERROR, set stop_reason
to UNWIND_UNAVAILABLE, otherwise throw the exception.
(get_frame_locals_address): Catch exception base->this_locals.
(get_frame_args_address): Likewise.

Fix ia64 GDB build

Commit 849d0ba8 breaks GDB build for ia64 with --with-libunwind-ia64=yes.
This patch fixes it.

gdb:

2018-03-12 Yao Qi <yao.qi@linaro.org>

* ia64-libunwind-tdep.c (libunwind_get_reg_special): Change
parameter type to readable_regcache.
* ia64-libunwind-tdep.h (libunwind_get_reg_special): Update
the declaration.

Use std::vector for field lists in dwarf2read.c

This changes dwarf2read.c to use std::vector rather than a linked list
when managing the fields and base classes to be added to a type. This
removes some bookkeeping types and also allows the removal of some
cleanups.

gdb/ChangeLog
2018-03-11 Tom Tromey <tom@tromey.com>

* dwarf2read.c (struct nextfield): Add initializers.
(struct nextfnfield): Remove.
(struct fnfieldlist): Add initializers. Remove "length" and
"head", use std::vector.
(struct decl_field_list): Remove.
(struct field_info): Add initializers.
<fields, baseclasses>: Now std::vector.
<nbaseclasses, nfnfields, typedef_field_list_count,
nested_types_list_count>: Remove.
(dwarf2_add_field, dwarf2_add_type_defn)
(dwarf2_attach_fields_to_type, dwarf2_add_member_fn)
(dwarf2_attach_fn_fields_to_type, handle_struct_member_die)
(process_structure_scope): Update.

Remove cleanup from build_type_psymtabs_1

This removes a cleanup from build_type_psymtabs_1, by using
std::vector rather than manual memory management.

gdb/ChangeLog
2018-03-11 Tom Tromey <tom@tromey.com>

* dwarf2read.c (sort_tu_by_abbrev_offset): Change to be suitable
for use by std::sort.
(build_type_psymtabs_1): Use std::vector.

Automatic date update in version.in

Automatic date update in version.in

Automatic date update in version.in

x86: Encode EVEX instructions with VEX128 if possible

If EVEX encoding isn't required, we can encode EVEX instructions with
VEX128.

* config/tc-i386.c (optimize_encoding): Encode EVEX instructions
with VEX128 if EVEX encoding isn't required.
* testsuite/gas/i386/optimize-1.d: Updated.
* testsuite/gas/i386/x86-64-optimize-2.d: Likewise.

Fix Sparc, s390 and AArch64 targets so that they can handle relocs against ifunc symbols found in note sections.

Following on from PR 22929, I have found the same problem exists with
other ifunc supporting targets too. Plus see this link for the bug
being reported against the s390x binutils for Fedora rawhide:

https://bugzilla.redhat.com/show_bug.cgi?id=1553705

So I am going to check in the patch below which applies the same
change that H.J. made for the x86_64 target to the other affected
targets. (Specifically: S390, AArch64 and Sparc). Plus it adds a new
test to the linker testsuite to make sure that this problem stays
fixed.

bfd * elf64-s390.c (elf_s390_relocate_section): Move check for
relocations against non-allocated sections to before the code that
handles ifunc relocations.
* elf32-s390.c (elf_s390_relocate_section): Likewise.
* elfnn-aarch64.c (elfNN_aarch64_final_link_relocate): Treat
relocs against IFUNC symbols in non-allocated sections as relocs
against FUNC symbols.
* elfxx-sparc.c (_bfd_sparc_elf_relocate_section): Likewise.

ld * testsuite/ld-ifunc/ifuncmod5.s: New test. Checks that targets
that support IFUNC symbols can handle relocations against those
symbols in NOTE sections.
* testsuite/ld-ifunc/ifuncmod5.d: New file: Driver for the new
test.
* testsuite/ld-ifunc/ifunc.exp: Run the new test.

Update "gdb --configuration" with recently added features

This adds display of a few recently added optional features.

gdb/ChangeLog:
2018-03-09 Eli Zaretskii <eliz@gnu.org>

* top.c (print_gdb_configuration): Reflect LIBIPT, LIBMEMCHECK,
and LIBMPFR in the printed configuration.

x86: Strip whitespace in check_VecOperations

Since the addition of pseudo prefixes changed how the scrubber treats
'{', we need to explicitly strip whitespace in check_VecOperations ().

* config/tc-i386.c (check_VecOperations): Strip whitespace.
* testsuite/gas/i386/optimize-1.s: Add whitespaces before
{%k7} and {z},
* testsuite/gas/i386/x86-64-optimize-2.s: Likewise.

Use scoped_fd in more places

This changes a few more places to use scoped_fd. This allows the
removal of some cleanups.

Regression tested by the buildbot, though note that I'm not sure
whether the buildbot actually builds anything using all of these
files.

gdb/ChangeLog
2018-03-08 Tom Tromey <tom@tromey.com>

* source.c (get_filename_and_charpos): Use scoped_fd.
* nto-procfs.c (procfs_open_1): Use scoped_fd.
(procfs_pidlist): Likewise.
* procfs.c (proc_get_LDT_entry): Use scoped_fd.
(iterate_over_mappings): Likewise.

Change enable_thread_stack_temporaries to an RAII class

This started as a patch to change enable_thread_stack_temporaries to
be an RAII class, but then I noticed that this code used a VEC, so I
went ahead and did a bit more C++-ification, changing
stack_temporaries_enabled to a bool and changing stack_temporaries to
a std::vector.

Regression tested by the buildbot.

gdb/ChangeLog
2018-03-08 Tom Tromey <tom@tromey.com>

* infcall.c (struct call_return_meta_info)
<stack_temporaries_enabled>: Remove.
(get_call_return_value, call_function_by_hand_dummy): Update.
* thread.c (disable_thread_stack_temporaries): Remove.
(enable_thread_stack_temporaries): Remove.
(thread_stack_temporaries_enabled_p): Return bool.
(push_thread_stack_temporary, value_in_thread_stack_temporaries)
(get_last_thread_stack_temporary): Update.
* eval.c (evaluate_subexp): Update.
* gdbthread.h (class enable_thread_stack_temporaries): Now a
class, not a function.
(value_ptr, value_vec): Remove typedefs.
(class thread_info) <stack_temporaries_enabled>: Now bool.
<stack_temporaries>: Now a std::vector.
(thread_stack_temporaries_enabled_p)
(value_in_thread_stack_temporaries): Return bool.

x86: Optimize with EVEX128 encoding for AVX512VL

We can optimize AVX512 instructions with EVEX128 only if AVX512VL is
enabled:

1. Instruction is an AVX512VL instruction. Or
2. AVX512VL is enabled explicitly by -march=+avx512vl/".arch .avx512vl".

We should optimize EVEX instructions with EVEX128 encoding when pseudo
{evex} prefix is used.

* config/tc-i386.c (set_cpu_arch): Set cpu_arch_isa_flags.
(md_parse_option): Likewise.
(optimize_encoding): Check i.tm.cpu_flags and cpu_arch_isa_flags
for cpuavx512vl instead of cpu_arch_flags. Optimize EVEX with
EVEX128 when EVEX encoding is required.
* testsuite/gas/i386/i386.exp: Run optimize-4, optimize-5,
x86-64-optimize-5 and x86-64-optimize-6.
* testsuite/gas/i386/optimize-1.d: Updated.
* testsuite/gas/i386/x86-64-optimize-2.d: Likewise.
* testsuite/gas/i386/optimize-4.d: New file.
* testsuite/gas/i386/optimize-4.s: Likewise.
* testsuite/gas/i386/optimize-5.d: Likewise.
* testsuite/gas/i386/optimize-5.s: Likewise.
* testsuite/gas/i386/x86-64-optimize-5.d: Likewise.
* testsuite/gas/i386/x86-64-optimize-5.s: Likewise.
* testsuite/gas/i386/x86-64-optimize-6.d: Likewise.
* testsuite/gas/i386/x86-64-optimize-6.s: Likewise.

Fix misreporting of omitted bytes for large remote packets

In remote.c, when the output of "set debug remote" is truncated, the
number of characters reported is incorrect. What is reported is the
number of characters added by the quoting, not the number of characters
that were truncated.

gdb/ChangeLog:

* remote.c (putpkt_binary): Fix omitted bytes reporting.
(getpkt_or_notif_sane_1): Likewise.

Automatic date update in version.in

Use std::string to simplify build_id_to_debug_bfd

Using std::string here makes the string building simpler thank playing
with char*. A stack allocation is replaced with heap allocation, but
I don't think this is really performance-critical code.

gdb/ChangeLog:

* build-id.c (build_id_to_debug_bfd): Use std::string.

Make find_separate_debug_file* return std::string

This patch makes the find_separate_debug_file* functions return
std::string, which allows to get rid of some manual memory management
and one cleanup.

gdb/ChangeLog:

* build-id.c (find_separate_debug_file_by_buildid): Return
std::string.
* build-id.h (find_separate_debug_file_by_buildid): Return
std::string.
* coffread.c (coff_symfile_read): Adjust to std::string.
* elfread.c (elf_symfile_read): Adjust to std::string.
* symfile.c (separate_debug_file_exists): Change parameter to
std::string.
(find_separate_debug_file): Return std::string.
(find_separate_debug_file_by_debuglink): Return std::string.
* symfile.h (find_separate_debug_file_by_debuglink): Return
std::string.

Add xml_escape_text_append and use it

[This patch should go on top of "linux_qxfer_libraries_svr4: Use
std::string", I should have sent them together as a series.]

I noticed that linux_qxfer_libraries_svr4 used xml_escape_text, which
returns an std::string. That string is then copied into a larger
buffer. It would be more efficient if we had a version of
xml_escape_text which appended to an existing string instead of
returning a new one. This is what this patch does.

I manually verified that the output of linux_qxfer_libraries_svr4 didn't
change before/after the patch.

gdb/ChangeLog:

* common/xml-utils.c (xml_escape_text): Move code to...
(xml_escape_text_append): ... this new function.
* common/xml-utils.h (xml_escape_text_append): New declaration.
* unittests/xml-utils-selftests.c (test_xml_escape_text_append):
New function.
(_initialize_xml_utils): register test_xml_escape_text_append as
a selftest.

gdb/gdbserver/ChangeLog:

* linux-low.c (linux_qxfer_libraries_svr4): Use
xml_escape_text_append.

linux_qxfer_libraries_svr4: Use std::string

Use std::string, removing some manual memory management.

gdb/gdbserver/ChangeLog:

* linux-low.c (linux_qxfer_libraries_svr4): Use std::string.

remote-stdio-gdbserver: Pass "target" to remote_exec to delete file

As described here

https://sourceware.org/bugzilla/show_bug.cgi?id=22841

there seems to be situations where the remote-stdio-gdbserver board
fails to delete the uploaded binary file. Passing "target" fixes the
issue for Christian who reported the bug.

I did not experience this problem, but passing "target" to remote_exec
still works for me, so I'm fine with changing it.

Any objection?

gdb/testsuite/ChangeLog:

PR gdb/22841
* boards/remote-stdio-gdbserver.exp (${board}_file): Pass
"target" to remote_exec.

Don't redefine upload/download/file in gdbserver-base

Before patch

Make native gdbserver boards no longer be "remote" (in DejaGnu terms)
739b3f1d8ff7072dcc66240c25b026c6433bda1a

the local gdbserver boards (except native-extended-gdbserver...) were
considered as remote by DejaGNU. To avoid DejaGNU trying to use ssh/scp
to download the files to the target (which is actually local), the
gdbserver-base.exp file defined some _download, _upload and _file board
operations to override the default behavior, and instead just use local
operations.

The same patch also changed remote-stdio-gdbserver.exp to make it
inherit from gdbserver-base.exp. Since then, this board (which is
actually remote) uses the overrides with local file operations. As a
result, files are never actually copied to the target.

I think we can simply remove the overrides from gdbserver-base.exp.
Because all boards should be properly considered local or remote by
DejaGNU, it should by default use the right method for transferring
files.

gdb/testsuite/ChangeLog:

PR gdb/22841
* boards/gdbserver-base.exp (${board}_file, ${board}_download,
${board}_upload): Remove.

x86-64: Also optimize "clr reg64"

"clr reg" is an alias of "xor reg, reg". We can encode "clr reg64" as
"xor reg32, reg32".

gas/

* config/tc-i386.c (optimize_encoding): Also encode "clr reg64"
as "xor reg32, reg32".
* testsuite/gas/i386/x86-64-optimize-1.s: Add "clr reg64" tests.
* testsuite/gas/i386/x86-64-optimize-1.d: Updated.

opcodes/

* i386-opc.tbl: Add Optimize to clr.
* i386-tbl.h: Regenerated.

x86: Treat relocation against IFUNC symbol as FUNC

When resolving a relocation against IFUNC symbol in a SHT_NOTE section
without SHF_ALLOC, we treat it as relocation against FUNC symbol since
it needs the address of IFUNC symbol, not the address returned by IFUNC
function.

bfd/

PR ld/22929
* elf32-i386.c (elf_i386_relocate_section): Treat relocation
against IFUNC symbol in SHT_NOTE section without SHF_ALLOC as
relocation against FUNC symbol.
* elf64-x86-64.c (elf_x86_64_relocate_section): Likewise.

ld/

PR ld/22929
* testsuite/ld-i386/i386.exp: Run PR ld/22929 test.
* testsuite/ld-x86-64/x86-64.exp: Likewise.
* testsuite/ld-i386/pr22929.d: New file.
* testsuite/ld-i386/pr22929.s: Likewise.
* testsuite/ld-x86-64/pr22929.d: Likewise.
* testsuite/ld-x86-64/pr22929.s: Likewise.