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PR 3136
* config/obj-elf.c (elf_pseudo_table): Add entry for .bss.
(obj_elf_bss): New function. Change to the .bss section.
Support an optional subsection number.
(obj_elf_change_section): Call obj_elf_section_change_hook.
(obj_elf_section): Likewise.
(obj_elf_data): Likewise.
(obj_elf_text): Likewise.
(obj_elf_struct): Likewise.
(obj_elf_subsection): Likewise.
(obj_elf_previous): Likewise.
* config/obj-elf.h (obj_elf_bss): Prototype.
* doc/as.texi (Bss): New node.
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Change int parameter to bool in remote_notice_new_inferior (remote.c)
and notice_new_inferior (infcmd.c), and update the callers.
There should be no user visible changes after this commit.
gdb/ChangeLog:
* infcmd.c (notice_new_inferior): Change parameter type.
* inferior.h (notice_new_inferior): Change parameter type.
* remote.c (remote_notice_new_inferior): Change parameter type to
bool. Also update type of local variable to bool.
(remote_target::update_thread_list): Change type of local variable
to bool.
(remote_target::process_stop_reply): Pass bool instead of int to
remote_notice_new_inferior.
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target_stack::unpush needs to get the target beneath the target being
unpushed to update the m_top field (which keeps the stratum of the
top-most target). It currently does so using target_ops::beneath, which
uses the target stack of the current inferior. The target stack of the
current inferior is the same as the `this` in the unpush method.
Avoid this detour and remove this reference to the current inferior by
calling target_ops::find_beneath and passing `this` to find the target
beneath `t` in the target stack that is `this`.
gdb/ChangeLog:
* target.c (target_stack::unpush): Call target_ops::find_beneath
to get the target beneath `t`.
Change-Id: If9d9661567c5c16f655d270bd2ec9f1b3aa6dadc
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The target_close function currently checks that the target to be closed
isn't pushed in the current inferior:
gdb_assert (!current_inferior ()->target_is_pushed (targ));
Normally, a target is closed when its refcount has dropped to 0, due to
not being used in any inferior anymore. I think it would make sense to
change that assert to not only check in the current inferior, but to
check in all inferiors. It would be quite bad (and a bug) to close a
target while it's still pushed in one of the non-current inferiors.
gdb/ChangeLog:
* target.c (target_close): Check in all inferiors that the
target is not pushed.
Change-Id: I6e37fc3f3476a0593da1e476604642b2de90f1d5
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Instead of initializing a new debuginfod_client for each query, store
the first initialized client for the remainder of the GDB session and
use it for every debuginfod query.
In conjunction with upcoming changes to libdebuginfod, using one client
for all queries will avoid latency caused by unneccesarily setting up
TCP connections multiple times.
Tested on Fedora 33 x86_64.
gdb/ChangeLog:
* debuginfod-support.c (debuginfod_init): Remove.
(get_debuginfod_client): New function.
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Now that libiberty includes htab_eq_string, we can remove the
identical function from gdb.
gdb/ChangeLog
2021-05-07 Tom Tromey <tom@tromey.com>
* breakpoint.c (ambiguous_names_p): Use htab_eq_string.
* utils.c (streq_hash): Remove.
* utils.h (streq_hash): Don't declare.
* completer.c (completion_tracker::discard_completions): Update
comment.
* ada-lang.c (_initialize_ada_language): Use htab_eq_string.
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Re-format all Python files using black [1] version 21.4b0. The goal is
that from now on, we keep all Python files formatted using black. And
that we never have to discuss formatting during review (for these files
at least) ever again.
One change is needed in gdb.python/py-prettyprint.exp, because it
matches the string representation of an exception, which shows source
code. So the change in formatting must be replicated in the expected
regexp.
To document our usage of black I plan on adding this to the "GDB Python
Coding Standards" wiki page [2]:
--8<--
All Python source files under the `gdb/` directory must be formatted
using black version 21.4b0.
This specific version can be installed using:
$ pip3 install 'black == 21.4b0'
All you need to do to re-format files is run `black <file/directory>`,
and black will re-format any Python file it finds in there. It runs
quite fast, so the simplest is to do:
$ black gdb/
from the top-level.
If you notice that black produces changes unrelated to your patch, it's
probably because someone forgot to run it before you. In this case,
don't include unrelated hunks in your patch. Push an obvious patch
fixing the formatting and rebase your work on top of that.
-->8--
Once this is merged, I plan on setting a up an `ignoreRevsFile`
config so that git-blame ignores this commit, as described here:
https://github.com/psf/black#migrating-your-code-style-without-ruining-git-blame
I also plan on working on a git commit hook (checked in the repo) to
automatically check the formatting of the Python files on commit.
[1] https://pypi.org/project/black/
[2] https://sourceware.org/gdb/wiki/Internals%20GDB-Python-Coding-Standards
gdb/ChangeLog:
* Re-format all Python files using black.
gdb/testsuite/ChangeLog:
* Re-format all Python files using black.
* gdb.python/py-prettyprint.exp (run_lang_tests): Adjust.
Change-Id: I28588a22c2406afd6bc2703774ddfff47cd61919
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In code dealing with commands, there's a pattern repeated a few times of
calling lookup_cmd with some speficic arguments and then using strcmp
on the returned command to check for an exact match.
As a later patch would add a few more similar lines of code, this patch
adds a new lookup_cmd_exact function which simplify this use case.
gdb/ChangeLog:
* cli/cli-decode.c (lookup_cmd_exact): Add.
* cli/cli-script.c (do_define_command): Use lookup_cmd_exact.
(define_prefix_command): Ditto.
* command.h: Add lookup_cmd_exact.
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XCOFF.
gas * config/tc-ppc.c (ppc_function): Update comment for
fifth argument.
(ppc_frob_symbol): Remove ppc_last_function check.
Make sure coff_last_function is reset.
Correctly set fsize when not provided in .function.
* testsuite/gas/ppc/aix.exp: New tests.
* testsuite/gas/ppc/xcoff-function-1-32.d: New test.
* testsuite/gas/ppc/xcoff-function-1-64.d: New test.
* testsuite/gas/ppc/xcoff-function-1.s: New test.
bfd * coff-rs6000.c (xcoff_dwsect_names): Add new DWARF
sections.
* coffgen.c (coff_pointerize_aux): Handle C_DWARF.
(coff_print_symbol): Likewise.
* libxcoff.h (XCOFF_DWSECT_NBR_NAMES): Update.
gas * config/obj-coff.c (coff_frob_symbol): Don't skip C_DWARF.
(coff_adjust_section_syms): Use corrext auxent for C_DWARF.
(coff_frob_section): Likewise.
* config/obj-coff.h (SA_GET_SECT_SCNLEN,
SA_GET_SECT_NRELOC, SA_SET_SECT_SCNLEN,
SA_SET_SECT_NRELOC) New defines.
(SET_SECTION_RELOCS): Adjust for C_DWARF.
* config/tc-ppc.c (ppc_frob_symbol): Don't skip C_DWARF.
(ppc_adjust_symtab): Reorder C_DWARF symbols.
* testsuite/gas/ppc/aix.exp: New tests.
* testsuite/gas/ppc/xcoff-dwsect-2-32.d: New test.
* testsuite/gas/ppc/xcoff-dwsect-2-64.d: New test.
* testsuite/gas/ppc/xcoff-dwsect-2.s: New test.
include * coff/internal.h (C_DWARF): New define.
* coff/xcoff.h (SSUBTYP_DWLOC, SSUBTYP_DWFRAME,
SSUBTYP_DWMAC): New defines.
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* readelf.c (no_processor_specific_unwind): New function.
(process_unwind): Use no_processor_specific_unwind for X86
targets.
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The libiberty hash table includes a helper function for strings, but
no equality function. Consequently, this equality function has been
reimplemented a number of times in both the gcc and binutils-gdb
source trees. This patch adds the function to the libiberty hash
table, as a step toward the goal of removing all the copies.
One change to gcc is included here. Normally I would have put this in
the next patch, but gensupport.c used the most natural name for its
reimplementation of this function, and this can't coexist with the
extern function in libiberty.
include
* hashtab.h (htab_eq_string): Declare.
libiberty
* hashtab.c (htab_eq_string): New function.
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With the test-case attached in PR26327, gdb aborts:
...
$ gdb -q -batch 447.dealII -ex "b main"
Aborted (core dumped)
...
when running out of stack due to infinite recursion:
...
#8 0x00000000006aaba6 in dwarf2_cu::get_builder (this=0x35e4b40)
at src/gdb/dwarf2/read.c:700
#9 0x00000000006aaba6 in dwarf2_cu::get_builder (this=0x22ee2c0)
at src/gdb/dwarf2/read.c:700
#10 0x00000000006aaba6 in dwarf2_cu::get_builder (this=0x35e4b40)
at src/gdb/dwarf2/read.c:700
#11 0x00000000006aaba6 in dwarf2_cu::get_builder (this=0x22ee2c0)
at src/gdb/dwarf2/read.c:700
...
We're recursing in this code in dwarf2_cu::get_builder():
...
/* Otherwise, search ancestors for a valid builder. */
if (ancestor != nullptr)
return ancestor->get_builder ();
...
due to the fact that the ancestor chain is a cycle.
Higher up in the call stack, we find some code that is responsible for
triggering this, in new_symbol:
...
case DW_TAG_formal_parameter:
{
/* If we are inside a function, mark this as an argument. If
not, we might be looking at an argument to an inlined function
when we do not have enough information to show inlined frames;
pretend it's a local variable in that case so that the user can
still see it. */
struct context_stack *curr
= cu->get_builder ()->get_current_context_stack ();
if (curr != nullptr && curr->name != nullptr)
SYMBOL_IS_ARGUMENT (sym) = 1;
...
This is code that was added to support pre-4.1 gcc, to be able to show
arguments of inlined functions as locals, in the absense of sufficiently
correct debug information.
Removing this code (that is, doing SYMBOL_IS_ARGUMENT (sym) = 1
unconditially), fixes the crash. The ancestor variable also seems to have
been added specifically to deal with fallout from this code, so remove that as
well.
Tested on x86_64-linux:
- openSUSE Leap 15.2 with gcc 7.5.0, and
- openSUSE Tumbleweed with gcc 10.3.0.
gdb/ChangeLog:
2021-05-07 Tom de Vries <tdevries@suse.de>
PR symtab/26327
* dwarf2/read.c (struct dwarf2_cu): Remove ancestor.
(dwarf2_cu::get_builder): Remove ancestor-related code.
(new_symbol): Remove code supporting pre-4.1 gcc that show arguments
of inlined functions as locals.
(follow_die_offset, follow_die_sig_1): Remove setting of ancestor.
gdb/doc/ChangeLog:
2021-05-07 Tom de Vries <tdevries@suse.de>
PR symtab/26327
* gdb.texinfo (Inline Functions): Update.
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x86-64 uses rela relocations. The comment next to the field's declaration
says "Non-zero values for ELF USE_RELA targets should be viewed with
suspicion ..." And indeed the fields being non-zero causes section
contents to be accumulated into the final relocated values in addition to
the relocations' addends, which is contrary to the ELF spec.
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Surely disp processing should access the disp operand, not an imm one.
This is not an active issue only because imms and disps are, at the
moment, overlapping fields of the same union.
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i386_finalize_immediate() is used for both AT&T and Intel immediate
operand handling. Move an AT&T-only check to i386_immediate(), which at
the same time allows it to cover other cases as well, giving an overall
better / more consistent diagnostic.
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- Drop a pointless & where just before it was checked that the
respective bits are clear already anyway.
- Avoid a not really necessary operand_type_set() and a redundant
operand_type_or() / operand_type_and() pair.
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* ldelfgen.c (compare_link_order): Ignore section size when
performing a relocateable link.
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Change gdbscm_safe_source_script to return a
gdb::unique_xmalloc_ptr<char> instead of a raw char*. Update the
users of this function.
There should be no user visible change after this commit.
gdb/ChangeLog:
* guile/guile-internal.h (gdbscm_safe_source_script): Change
function return type.
* guile/guile.c (gdbscm_source_script): Update to handle change in
gdbscm_safe_source_script.
* guile/scm-objfile.c (gdbscm_source_objfile_script): Likewise.
* guile/scm-safe-call.c (gdbscm_safe_source_script): Change return
type.
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This is a GNU C extension and is not valid in ISO C.
* dwarf.c: Don't omit second operand of '?' operator.
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In commit 89753bbf81 I enabled a warning for scripts redefining
symbols. The idea was to not warn for symbols defined by shared
libraries (the h->u.def.section->output_section != NULL test), but the
test failed to take into account absolute symbols. Absolute symbols
defined in shared libraries are currently indistinguishable from
absolute symbols defined in relocatable objects, at least when only
looking at struct bfd_link_hash_entry. So, don't warn for any
absolute symbols.
* ldexp.c (update_definedness): Don't return false for absolute
symbols.
* ldmain.c (multiple_definition): Print "warning: " in message
when not a hard error.
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A random grab bag of minor fixes to enable -Werror for this port.
Check the return values of read & write calls and issue warnings when
they fail.
Fixup funky pointer math as the compiler doesn't like ++ on void*.
Handle short reads with fread().
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Add scope braces to a bunch of the generated sections to avoid compiler
warnings about mixing code & variable declarations.
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No need to implement this ourselves when POSIX has a nice API.
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Change the printf formats a little to fix the last build warnings in
here, and then turn on -Werror by default for the arch port.
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Not sure what we should do here when this fails, so just emit a warning
for now to satisfy unused result compiler warnings. We can see if any
users actually notice here.
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Commit 0b3e14c90283 edited these by hand.
* bfd-in2.h: Regenerate.
* libbfd.h: Regenerate.
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Fixes XPASSes on frv-linux.
* testsuite/ld-elf/pr27825-1.d: Correct xfail.
* testsuite/ld-elf/pr27825-2.d: Likewise.
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Use unique_xmalloc_ptr to avoid manual memory management.
gdb/ChangeLog:
* inferior.h (class inferior) <args>: Change type to
unique_xmalloc_ptr.
* inferior.c (inferior::~inferior): Don't free args.
* infcmd.c (get_inferior_args): Adjust.
(set_inferior_args): Adjust.
Change-Id: I96300e59eb2faf2d80660416a8f5694d243a944e
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The 'handle_v_attach', 'handle_v_run', and 'handle_v_kill' functions'
return values are unused. They indicate error/success result by
putting packets. Make the functions void.
Tested by rebuilding.
gdbserver/ChangeLog:
2021-05-06 Tankut Baris Aktemur <tankut.baris.aktemur@intel.com>
* server.cc (handle_v_attach)
(handle_v_run)
(handle_v_kill): Make void.
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The current PLT generation code will generate invalid code when the PLT
relocation offset exceeds 64k. This fixes the issue by detecting large
plt_reloc offsets and generare code sequences to create larger plt
relocations.
The "large" plt code needs 2 extra instructions to create 32-bit offsets.
bfd/ChangeLog:
PR 27746
* elf32-or1k.c (PLT_ENTRY_SIZE_LARGE, PLT_MAX_INSN_COUNT,
OR1K_ADD, OR1K_ORI): New macros to help with plt creation.
(elf_or1k_link_hash_table): New field plt_count.
(elf_or1k_link_hash_entry): New field plt_index.
(elf_or1k_plt_entry_size): New function.
(or1k_write_plt_entry): Update to support variable size PLTs.
(or1k_elf_finish_dynamic_sections): Use new or1k_write_plt_entry
API.
(or1k_elf_finish_dynamic_symbol): Update to write large PLTs
when needed.
(allocate_dynrelocs): Use elf_or1k_plt_entry_size to account for
PLT size.
ld/ChangeLog:
PR 27746
testsuite/ld-or1k/or1k.exp (or1kplttests): Add tests for linking
along with gotha() relocations.
testsuite/ld-or1k/gotha1.dd: New file.
testsuite/ld-or1k/gotha1.s: New file.
testsuite/ld-or1k/gotha2.dd: New file.
testsuite/ld-or1k/gotha2.s: New file
testsuite/ld-or1k/pltlib.s (x): Define size to avoid link
failure.
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Now that we support R_OR1K_GOT_AHI16 we can relax the R_OR1K_GOT16
overflow validation check if the section has R_OR1K_GOT_AHI16.
We cannot simple disable R_OR1K_GOT16 overflow validation as there will
still be binaries that will have only R_OR1K_GOT16. The
R_OR1K_GOT_AHI16 relocation will only be added by GCC when building with
the option -mcmodel=large.
This assumes that R_OR1K_GOT_AHI16 will come before R_OR1K_GOT16, which
is the code pattern that will be emitted by GCC.
bfd/ChangeLog:
PR 21464
* elf32-or1k.c (or1k_elf_relocate_section): Relax R_OR1K_GOT16
overflow check if we have R_OR1K_GOT_AHI16 followed by
R_OR1K_GOT16.
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The gotha() relocation mnemonic will be outputted by OpenRISC GCC when
using the -mcmodel=large option. This relocation is used along with
got() to generate 32-bit GOT offsets. This increases the previous GOT
offset limit from the previous 16-bit (64K) limit.
This is needed on large binaries where the GOT grows larger than 64k.
bfd/ChangeLog:
PR 21464
* bfd-in2.h: Add BFD_RELOC_OR1K_GOT_AHI16 relocation.
* elf32-or1k.c (or1k_elf_howto_table, or1k_reloc_map): Likewise.
(or1k_final_link_relocate, or1k_elf_relocate_section,
or1k_elf_check_relocs): Likewise.
* libbfd.h (bfd_reloc_code_real_names): Likewise.
* reloc.c: Likewise.
cpu/ChangeLog:
PR 21464
* or1k.opc (or1k_imm16_relocs, parse_reloc): Define parse logic
for gotha() relocation.
include/ChangeLog:
PR 21464
* elf/or1k.h (elf_or1k_reloc_type): Define R_OR1K_GOT_AHI16 number.
opcodes/ChangeLog:
PR 21464
* or1k-asm.c: Regenerate.
gas/ChangeLog:
PR 21464
* testsuite/gas/or1k/reloc-1.s: Add test for new relocation.
* testsuite/gas/or1k/reloc-1.d: Add test result for new
relocation.
Cc: Giulio Benetti <giulio.benetti@benettiengineering.com>
fixup reloc, add tests
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When building protobuf we were seeing the assert failure:
/home/giuliobenetti/git/upstream/or1k-binutils-2.36.1/host/lib/gcc/or1k-buildroot-linux-uclibc/9.3.0/../../../../or1k-buildroot-linux-uclibc/bin/ld:
BFD (GNU Binutils) 2.36.1 assertion fail elf32-or1k.c:2377
/home/giuliobenetti/git/upstream/or1k-binutils-2.36.1/host/lib/gcc/or1k-buildroot-linux-uclibc/9.3.0/../../../../or1k-buildroot-linux-uclibc/bin/ld:
BFD (GNU Binutils) 2.36.1 assertion fail elf32-or1k.c:2377
/home/giuliobenetti/git/upstream/or1k-binutils-2.36.1/host/lib/gcc/or1k-buildroot-linux-uclibc/9.3.0/../../../../or1k-buildroot-linux-uclibc/bin/ld:
BFD (GNU Binutils) 2.36.1 assertion fail elf32-or1k.c:2377
collect2: error: ld returned 1 exit status
This failure happens while writing out PLT entries, there is a check
"BFD_ASSERT (h->dynindx != -1)" to confirm all plt entries have dynamic
symbol attributes. This was failing for symbols that were
"forced_local" in previous linking code.
The fix adds logic to or1k_elf_adjust_dynamic_symbol to identify
"forced_local" symbols and exclude them from the the PLT.
bfd/ChangeLog:
PR 27624
* elf32-or1k.c (or1k_elf_adjust_dynamic_symbol): Change
condition used to cleanup plt entries to cleanup forced local
entries.
Cc: Giulio Benetti <giulio.benetti@benettiengineering.com>
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Currently, using the guile API, if a user tries to print a breakpoint
object that represents a watchpoint, then GDB will crash. For
example:
(gdb) guile (use-modules (gdb))
(gdb) guile (define wp1 (make-breakpoint "some_variable" #:type BP_WATCHPOINT #:wp-class WP_WRITE))
(gdb) guile (register-breakpoint! wp1)
(gdb) guile (display wp1) (newline)
Aborted (core dumped)
This turns out to be because GDB calls event_location_to_string on the
breakpoints location, and watchpoint breakpoints don't have a
location.
This commit resolves the crash by just skipping the printing of the
location if the breakpoint doesn't have one.
Potentially, we could improve on this by printing details about what
the watchpoint is watching, however, I'm considering this a possible
future enhancement, this commit focuses just on having GDB not crash.
gdb/ChangeLog:
* guile/scm-breakpoint.c (bpscm_print_breakpoint_smob): Only print
breakpoint locations when the breakpoint actually has a location.
gdb/testsuite/ChangeLog:
* gdb.guile/scm-breakpoint.exp (test_watchpoints): Print the
watchpoint object before and after registering it with GDB.
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Convert gdb.guile/scm-breakpoint.exp to use proc_with_prefix instead
of using nested with_test_prefix calls. Allows a level of indentation
to be removed from most of the test procs.
There were two procs that didn't use with_test_prefix, but I converted
them to be proc_with_prefix anyway, for consistency.
gdb/testsuite/ChangeLog:
* gdb.guile/scm-breakpoint.exp (test_bkpt_basic): Convert to
'proc_with_prefix', remove use of 'with_test_prefix', and
reindent.
(test_bkpt_deletion): Likewise.
(test_bkpt_cond_and_cmds): Likewise.
(test_bkpt_invisible): Likewise.
(test_watchpoints): Likewise.
(test_bkpt_internal): Likewise.
(test_bkpt_eval_funcs): Likewise.
(test_bkpt_registration): Likewise.
(test_bkpt_address): Convert to 'proc_with_prefix'.
(test_bkpt_probe): Likewise.
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Extend some test names to avoid duplicates.
gdb/testsuite/ChangeLog:
* gdb.guile/scm-breakpoint.exp (test_bkpt_basic): Extend test
names to avoid duplicates.
(test_bkpt_cond_and_cmds): Likewise.
(test_bkpt_eval_funcs): Likewise.
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Add a '--force' flag to the '-break-condition' command to be
able to force conditions.
gdb/ChangeLog:
2021-05-06 Tankut Baris Aktemur <tankut.baris.aktemur@intel.com>
* mi/mi-cmd-break.c (mi_cmd_break_condition): New function.
* mi/mi-cmds.c: Change the binding of "-break-condition" to
mi_cmd_break_condition.
* mi/mi-cmds.h (mi_cmd_break_condition): Declare.
* breakpoint.h (set_breakpoint_condition): Declare a new
overload.
* breakpoint.c (set_breakpoint_condition): New overloaded function
extracted out from ...
(condition_command): ... this.
* NEWS: Mention the change.
gdb/testsuite/ChangeLog:
2021-05-06 Tankut Baris Aktemur <tankut.baris.aktemur@intel.com>
* gdb.mi/mi-break.exp (test_forced_conditions): Add a test
for the -break-condition command's "--force" flag.
gdb/doc/ChangeLog:
2021-05-06 Tankut Baris Aktemur <tankut.baris.aktemur@intel.com>
* gdb.texinfo (GDB/MI Breakpoint Commands): Mention the
'--force' flag of the '-break-condition' command.
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Add a '--force-condition' flag to the '-break-insert' command to be
able to force conditions. Because the '-dprintf-insert' command uses
the same mechanism as the '-break-insert' command, it obtains the
'--force-condition' flag, too.
gdb/ChangeLog:
2021-05-06 Tankut Baris Aktemur <tankut.baris.aktemur@intel.com>
* mi/mi-cmd-break.c (mi_cmd_break_insert_1): Recognize the
'--force-condition' flag to force the condition in the
'-break-insert' and '-dprintf-insert' commands.
* NEWS: Mention the change.
gdb/testsuite/ChangeLog:
2021-05-06 Tankut Baris Aktemur <tankut.baris.aktemur@intel.com>
* gdb.mi/mi-break.exp (test_forced_conditions): New proc that
is called by the test.
gdb/doc/ChangeLog:
2021-05-06 Tankut Baris Aktemur <tankut.baris.aktemur@intel.com>
* gdb.texinfo (GDB/MI Breakpoint Commands): Mention the
'--force-condition' flag of the '-break-insert' and
'-dprintf-insert' commands.
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The tests currently in binutils are aimed at the original GCC-based
implementation of CTF, which emitted CTF directly from GCC's internal
representation. The approach now under review emits CTF from DWARF,
with an eye to eventually doing this for all non-DWARF debuginfo-like
formats GCC supports. It also uses a different flag to enable
CTF emission (-gctf rather than -gt).
Adjust the testsuite accordingly.
Given that the ld testsuite results are dependent on type ordering,
which we do not guarantee at all, it's amazing how little changes. We
see a few type ordering differences, slices change because the old GCC
was buggy (slices were emitted "backwards", from the wrong end of the
machine word) and its expected results were wrong, and GCC now emits the
underlying integral type for enumerated types, though CTF has no way to
record this yet (coming in v4).
GCC also now emits even hidden symbols into the symtab (and thus
symtypetab), so one symtypetab test changes its expected results
slightly to compensate.
Also add tests for the CTF_K_UNKNOWN nonrepresentable type: this
couldn't be done before now since the only GCC that emits CTF_K_UNKNOWN
for nonrepresentable types is the new one.
ld/ChangeLog
2021-05-06 Nick Alcock <nick.alcock@oracle.com>
* testsuite/ld-ctf/ctf.exp: Use -gctf, not -gt.
* testsuite/lib/ld-lib.exp: Likewise.
* testsuite/ld-ctf/nonrepresentable-1.c: New test for nonrepresentable types.
* testsuite/ld-ctf/nonrepresentable-2.c: Likewise.
* testsuite/ld-ctf/nonrepresentable.d: Likewise.
* testsuite/ld-ctf/array.d: Larger type section.
* testsuite/ld-ctf/data-func-conflicted.d: Likewise.
* testsuite/ld-ctf/enums.d: Likewise.
* testsuite/ld-ctf/conflicting-enums.d: Don't compare types.
* testsuite/ld-ctf/cross-tu-cyclic-conflicting.d: Changed type order.
* testsuite/ld-ctf/cross-tu-noncyclic.d: Likewise.
* testsuite/ld-ctf/slice.d: Adjust for improved slice emission.
libctf/ChangeLog
2021-05-06 Nick Alcock <nick.alcock@oracle.com>
* testsuite/lib/ctf-lib.exp: Use -gctf, not -gt.
* testsuite/libctf-regression/nonstatic-var-section-ld-r.lk:
Hidden symbols now get into the symtypetab anyway.
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Before now, types that could not be encoded in CTF were represented as
references to type ID 0, which does not itself appear in the
dictionary. This choice is annoying in several ways, principally that it
forces generators and consumers of CTF to grow special cases for types
that are referenced in valid dicts but don't appear.
Allow an alternative representation (which will become the only
representation in format v4) whereby nonrepresentable types are encoded
as actual types with kind CTF_K_UNKNOWN (an already-existing kind
theoretically but not in practice used for padding, with value 0).
This is backward-compatible, because CTF_K_UNKNOWN was not used anywhere
before now: it was used in old-format function symtypetabs, but these
were never emitted by any compiler and the code to handle them in libctf
likely never worked and was removed last year, in favour of new-format
symtypetabs that contain only type IDs, not type kinds.
In order to link this type, we need an API addition to let us add types
of unknown kind to the dict: we let them optionally have names so that
GCC can emit many different unknown types and those types with identical
names will be deduplicated together. There are also small tweaks to the
deduplicator to actually dedup such types, to let opening of dicts with
unknown types with names work, to return the ECTF_NONREPRESENTABLE error
on resolution of such types (like ID 0), and to print their names as
something useful but not a valid C identifier, mostly for the sake of
the dumper.
Tests added in the next commit.
include/ChangeLog
2021-05-06 Nick Alcock <nick.alcock@oracle.com>
* ctf.h (CTF_K_UNKNOWN): Document that it can be used for
nonrepresentable types, not just padding.
* ctf-api.h (ctf_add_unknown): New.
libctf/ChangeLog
2021-05-06 Nick Alcock <nick.alcock@oracle.com>
* ctf-open.c (init_types): Unknown types may have names.
* ctf-types.c (ctf_type_resolve): CTF_K_UNKNOWN is as
non-representable as type ID 0.
(ctf_type_aname): Print unknown types.
* ctf-dedup.c (ctf_dedup_hash_type): Do not early-exit for
CTF_K_UNKNOWN types: they have real hash values now.
(ctf_dedup_rwalk_one_output_mapping): Treat CTF_K_UNKNOWN types
like other types with no referents: call the callback and do not
skip them.
(ctf_dedup_emit_type): Emit via...
* ctf-create.c (ctf_add_unknown): ... this new function.
* libctf.ver (LIBCTF_1.2): Add it.
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In "mov. [bwl] reg, @ -reg", added a special case test
using the same register.
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Use buildargv to avoid writing to const memory and freeing invalid
pointers, and to avoid doing any string parsing ourselves.
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Always append ".COUNT" to local symbols to avoid potential conflicts
with existing local symbol "XXX.COUNT".
bfd/
PR ld/27825
* elflink.c (elf_link_output_symstrtab): Always append ".COUNT"
to local symbols.
ld/
PR ld/27825
* testsuite/ld-elf/pr27825-1.d: New file.
* testsuite/ld-elf/pr27825-1a.s: Likewise.
* testsuite/ld-elf/pr27825-1b.s: Likewise.
* testsuite/ld-elf/pr27825-2.d: Likewise.
* testsuite/ld-elf/pr27825-2a.s: Likewise.
* testsuite/ld-elf/pr27825-2b.s: Likewise.
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When running test-case gdb.threads/detach-step-over.exp with target board
readnow, I run into:
...
Reading symbols from /lib64/libc.so.6...^M
Reading symbols from \
/usr/lib/debug/lib64/libc-2.26.so-2.26-lp152.26.6.1.x86_64.debug...^M
Expanding full symbols from \
/usr/lib/debug/lib64/libc-2.26.so-2.26-lp152.26.6.1.x86_64.debug...^M
FAIL: gdb.threads/detach-step-over.exp: \
breakpoint-condition-evaluation=host: target-non-stop=on: non-stop=on: \
displaced=off: iter 2: attach (timeout)
...
Fix this by doing exp_continue when encountering the "Reading symbols" or
"Expanding full symbols" lines.
This is still fragile and times out with a higher load, similated f.i. by
stress -c 5. Fix that by using a timeout factor of 2.
Tested on x86_64-linux.
gdb/testsuite/ChangeLog:
2021-05-05 Tom de Vries <tdevries@suse.de>
* gdb.threads/detach-step-over.exp: Do exp_continue when encountering
"Reading symbols" or "Expanding full symbols" lines. Using timeout
factor of 2 for attach.
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When running test-case gdb.threads/fork-plus-threads.exp with target board
readnow, I run into:
...
[LWP 9362 exited]^M
[New LWP 9365]^M
[New LWP 9363]^M
[New LWP 9364]^M
FAIL: gdb.threads/fork-plus-threads.exp: detach-on-fork=off: \
inferior 1 exited (timeout)
...
There is code in the test-case to prevent timeouts with readnow:
...
-re "Thread \[^\r\n\]+ exited" {
# Avoid timeout with check-read1
exp_continue
}
-re "New Thread \[^\r\n\]+" {
# Avoid timeout with check-read1
exp_continue
}
...
but this doesn't trigger because we get LWP rather than Thread.
Fix this by making these regexps accept LWP as well.
Tested on x86_64-linux.
gdb/testsuite/ChangeLog:
2021-05-05 Tom de Vries <tdevries@suse.de>
* gdb.threads/fork-plus-threads.exp: Handle "New LWP <n>" and
"LWP <n> exited" messages.
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* vms-lib.c (vms_traverse_index): Account for vms_kbn size when
sanity checking keylen.
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A random grab bag of minor fixes to enable -Werror for this port.
Fix local prototypes for a bunch of functions (e.g. adding static).
Add missing includes for missing prototypes.
Move local variable decls from the middle of functions to the top
of the scope.
Fix a logic error when processing commands where p was reassigned
to cmd and then has its leading whitespace scanned a 2nd time.
Handle short reads with fread().
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I noticed two errors in the Type.fields documentation:
1. It is possible to call `fields` on an array type, in which case it
returns one field representing the array's range. It is not
mentioned.
2. When calling `fields` on a type that doesn't have fields (by nature,
like an int), GDB raises a TypeError. It does not return an empty
sequence, as currently documented.
Fix these, and change the text into a bullet list. I find it easier to
read than one big paragraph.
The first issue is already tested in gdb.python/py-type.exp, but the
second one doesn't seem tested. Add a test in gdb.python/py-type.exp
for it.
gdb/doc/ChangeLog:
* python.texi (Types In Python): Re-organize Type.fields doc.
Mention handling of array types. Correct doc for when calling
the method on another type.
gdb/testsuite/ChangeLog:
* gdb.python/py-type.exp (test_fields): Test calling fields on
an int type.
Change-Id: I11c688177504cb070b81a4446ac91dec50b56a22
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