I noticed that the "msg" variable in internal_vproblem could be
"const". This seems like an improvement because it can wind up in
rodata.
Tested by rebuilding.
gdb/ChangeLog
2019-04-11 Tom Tromey <tromey@adacore.com>
* utils.c (internal_vproblem): Make "msg" const.
gas/
2019-04-11 Max Filippov <jcmvbkbc@gmail.com>
* testsuite/gas/xtensa/loop-relax-2.d: New test definition.
* testsuite/gas/xtensa/loop-relax.d: New test definition.
* testsuite/gas/xtensa/loop-relax.s: New test source.
* testsuite/gas/xtensa/text-section-literals-1a.d: New test
definition.
* testsuite/gas/xtensa/text-section-literals-2.d: New test
definition.
* testsuite/gas/xtensa/text-section-literals-2.s: New test
source.
* testsuite/gas/xtensa/text-section-literals-2a.d: New test
definition.
* testsuite/gas/xtensa/text-section-literals-3.d: New test
definition.
* testsuite/gas/xtensa/text-section-literals-3.s: New test
source.
* testsuite/gas/xtensa/text-section-literals-4.d: New test
definition.
* testsuite/gas/xtensa/text-section-literals-4.s: New test
source.
* testsuite/gas/xtensa/text-section-literals-4a.d: New test
definition.
gas/
2019-04-11 Max Filippov <jcmvbkbc@gmail.com>
* testsuite/gas/xtensa/all.exp: Remove all expect-based
tests and all explicit run_dump_test / run_list_test
invocations. Add run_dump_tests for all .d files in the
test subdirectory.
* testsuite/gas/xtensa/entry_align.d: New test definition.
* testsuite/gas/xtensa/entry_align.l: New test output.
* testsuite/gas/xtensa/entry_misalign.d: New test definition.
* testsuite/gas/xtensa/entry_misalign2.d: New test definition.
* testsuite/gas/xtensa/j_too_far.d: New test definition.
* testsuite/gas/xtensa/j_too_far.l: New test output.
* testsuite/gas/xtensa/loop_align.d: New test definition.
* testsuite/gas/xtensa/loop_misalign.d: New test definition.
* testsuite/gas/xtensa/trampoline-2.d: New test definition.
* testsuite/gas/xtensa/trampoline-2.l: Remove empty output.
* testsuite/gas/xtensa/xtensa-err.exp: Use positive logic.
gas/
2019-04-11 Max Filippov <jcmvbkbc@gmail.com>
* config/tc-xtensa.c (xtensa_literal_pseudo): Drop code that has
no effect.
(get_literal_pool_location): Only search for the literal pool
when auto litpools is used, otherwise take one recorded in the
tc_segment_info_data.
(xtensa_assign_litpool_addresses): New function.
(xtensa_move_literals): Don't duplicate 'literal pool location
required...' error message. Call xtensa_assign_litpool_addresses.
Provide literal position at the beginning of each section for literal
space reserved by relaxations when text-section-literals or
auto-litpools options are used. Remove code that adds fill frag to the
literal section for every .literal_position directive to avoid creation
of empty literal sections.
Fix auto-litpools tests that got literal pool address changes.
gas/
2019-04-11 Max Filippov <jcmvbkbc@gmail.com>
* config/tc-xtensa.c (xtensa_is_init_fini): Add declaration.
(xtensa_mark_literal_pool_location): Don't add fill frag to literal
section that records literal pool location.
(md_begin): Call xtensa_mark_literal_pool_location when text
section literals or auto litpools are used.
(xtensa_elf_section_change_hook): Call
xtensa_mark_literal_pool_location when text section literals or
auto litpools are used, there's no literal pool location defined
for the current section and it's not .init or .fini.
* testsuite/gas/xtensa/auto-litpools-first1.d: Fix up addresses.
* testsuite/gas/xtensa/auto-litpools-first2.d: Likewise.
* testsuite/gas/xtensa/auto-litpools.d: Likewise.
Add a new option to disable the listing of discarded sections
in map file output. The use case stems from a large application
built with -ffunction-sections --gc-sections where the list of
discarded sections blows up the map file output. The default
behaviour remains to print discarded sections, but the new option
allows us to disable it.
ld/
* NEWS: Mention new option --no-print-map-discarded.
* ld.h (ld_config_type) <print_map_discarded>: New field.
* ldlang.c (lang_map): Conditionally output discarded sections
in map files based on configuration option.
* ldlex.h (option_values) <OPTION_PRINT_MAP_DISCARDED,
OPTION_NO_PRINT_MAP_DISCARDED>: New.
* ldmain.c (main): Enabled print_map_discarded by default.
* lexsup.c (ld_options): Add new command-line options.
(parse_args) <OPTION_NO_PRINT_MAP_DISCARDED,
OPTION_PRINT_MAP_DISCARDED>: New cases.
* ld.texi: Document new options.
* testsuite/ld-gc/gc.exp: Add new test.
* testsuite/ld-gc/skip-map-discarded.s: New file.
* testsuite/ld-gc/skip-map-discarded.d: New file.
* testsuite/ld-gc/skip-map-discarded.map: New file.
We can use CC_WITH_TWEAKS_FLAGS when cd-ing into the gdb build subdir and
invoking make check:
...
$ cd $objdir/gdb
$ make check \
RUNTESTFLAGS='--target_board=cc-with-tweaks' \
CC_WITH_TWEAKS_FLAGS='-z'
...
But when cd-ing into the top-level build dir and invoking make check-gdb
instead:
...
$ cd $objdir
$ make check-gdb \
RUNTESTFLAGS='--target_board=cc-with-tweaks' \
CC_WITH_TWEAKS_FLAGS='-z'
...
using CC_WITH_TWEAKS_FLAGS has no effect, because CC_WITH_TWEAKS_FLAGS is not
passed down from the top level Makefile.
Add cc-with-dwz.exp and cc-with-dwz-m.exp, that don't require
CC_WITH_TWEAKS_FLAGS to be set in the make invocation, allowing us to run these
test configurations from the toplevel build dir:
...
$ cd $objdir
$ make check-gdb \
RUNTESTFLAGS='--target_board=cc-with-dwz'
...
Tested on x86_64-linux.
gdb/testsuite/ChangeLog:
2019-04-11 Tom de Vries <tdevries@suse.de>
* boards/cc-with-dwz-m.exp: New file.
* boards/cc-with-dwz.exp: New file.
* boards/cc-with-tweaks.exp: Note that check-gdb doesn't work.
Add -static-pie tests for DT_INIT_ARRAY, DT_FINI_ARRAY, DT_PREINIT_ARRAY
and IFUNC.
* testsuite/config/default.exp (STATIC_PIE_LDFLAGS): New. Set
to "-static-pie" if target compiler supports it.
* testsuite/ld-elf/elf.exp: Run -static-pie tests if
$STATIC_PIE_LDFLAGS isn't empty.
* testsuite/ld-ifunc/ifunc.exp: Likewise.
When using DF_BIND_NOW on AArch64 we don't reserve the GOT slot for a TLSDESC,
but we still emitted DT_TLSDESC_GOT and DT_TLSDESC_PLT. This caused random
memory corruption as the "special" value of (bfd_vma)-1 would be set for
dt_tlsdesc_got.
Since we don't have a value of dt_tlsdesc_got I also don't emit DT_TLSDESC_PLT
now becuase it would point to an incomplete PLT. To be able to write the PLT
entry DT_TLSDESC_GOT is needed and since we don't have one we can't write the
PLT entry either.
It is my understanding that GLIBC doesn't need these two entries when not lazy
loading. Conversely AArch32 does not reserve neither the GOT not the PLT slot
when doing DF_BIND_NOW.
AArch32 does not need these checks because these values are initialized to 0
and so the if (...) checks don't pass, but on AArch64 these are initialized
to (bfd_vma)-1 and thus we need some extra checks.
bfd/ChangeLog:
PR ld/24302
* elfnn-aarch64.c (elfNN_aarch64_size_dynamic_sections): Don't emit
DT_TLSDESC_GOT and DT_TLSDESC_PLT when DF_BIND_NOW.
(elfNN_aarch64_finish_dynamic_sections): Don't write PLT if DF_BIND_NOW.
ld/ChangeLog:
PR ld/24302
* testsuite/ld-aarch64/aarch64-elf.exp: Add new test.
* testsuite/ld-aarch64/tls-relax-gdesc-le-now.d: New test.
This patch updates the Store allocation tags instructions in
Armv8.5-A Memory Tagging Extension. This is part of the changes
that have been introduced recently in the 00bet10 release
All of these instructions have an updated register operand (Xt -> <Xt|SP>)
- STG <Xt|SP>, [<Xn|SP>, #<simm>]
- STG <Xt|SP>, [<Xn|SP>, #<simm>]!
- STG <Xt|SP>, [<Xn|SP>], #<simm>
- STZG <Xt|SP>, [<Xn|SP>, #<simm>]
- STZG <Xt|SP>, [<Xn|SP>, #<simm>]!
- STZG <Xt|SP>, [<Xn|SP>], #<simm>
- ST2G <Xt|SP>, [<Xn|SP>, #<simm>]
- ST2G <Xt|SP>, [<Xn|SP>, #<simm>]!
- ST2G <Xt|SP>, [<Xn|SP>], #<simm>
- STZ2G <Xt|SP>, [<Xn|SP>, #<simm>]
- STZ2G <Xt|SP>, [<Xn|SP>, #<simm>]!
- STZ2G <Xt|SP>, [<Xn|SP>], #<simm>
In order to accept <Rt|SP> a new operand type Rt_SP is introduced which has
the same field as FLD_Rt but follows other semantics of Rn_SP.
*** gas/ChangeLog ***
2019-04-11 Sudakshina Das <sudi.das@arm.com>
* config/tc-aarch64.c (process_omitted_operand): Add case for
AARCH64_OPND_Rt_SP.
(parse_operands): Likewise.
* testsuite/gas/aarch64/armv8_5-a-memtag.d: Update tests.
* testsuite/gas/aarch64/armv8_5-a-memtag.s: Likewise.
* testsuite/gas/aarch64/illegal-memtag.l: Likewise.
* testsuite/gas/aarch64/illegal-memtag.s: Likewise.
*** include/ChangeLog ***
2019-04-11 Sudakshina Das <sudi.das@arm.com>
* opcode/aarch64.h (enum aarch64_opnd): Add AARCH64_OPND_Rt_SP.
*** opcodes/ChangeLog ***
2019-04-11 Sudakshina Das <sudi.das@arm.com>
* aarch64-opc.c (aarch64_print_operand): Add case for
AARCH64_OPND_Rt_SP.
(verify_constraints): Likewise.
* aarch64-tbl.h (QL_LDST_AT): Update to add SP qualifier.
(struct aarch64_opcode): Update stg, stzg, st2g, stz2g instructions
to accept Rt|SP as first operand.
(AARCH64_OPERANDS): Add new Rt_SP.
* aarch64-asm-2.c: Regenerated.
* aarch64-dis-2.c: Regenerated.
* aarch64-opc-2.c: Regenerated.
This patch adds the new LDGM/STGM instructions of the
Armv8.5-A Memory Tagging Extension. This is part of the changes
that have been introduced recently in the 00bet10 release
The instructions are as follows:
LDGM Xt, [<Xn|SP>]
STGM Xt, [<Xn|SP>]
*** gas/ChangeLog ***
2019-04-11 Sudakshina Das <sudi.das@arm.com>
* testsuite/gas/aarch64/armv8_5-a-memtag.d: New tests for ldgm and stgm.
* testsuite/gas/aarch64/armv8_5-a-memtag.s: Likewise.
* testsuite/gas/aarch64/illegal-memtag.l: Likewise.
* testsuite/gas/aarch64/illegal-memtag.s: Likewise.
*** opcodes/ChangeLog ***
2019-04-11 Sudakshina Das <sudi.das@arm.com>
* aarch64-asm-2.c: Regenerated.
* aarch64-dis-2.c: Likewise.
* aarch64-opc-2.c: Likewise.
* aarch64-tbl.h (aarch64_opcode): Add new ldgm and stgm.
A recent change made the AArch64 self tests resuse the saved regs
cache, rather than creating a new one. Ensure it is reset to default
values between tests.
Do this by splitting the reset functionality from trad_frame_alloc_saved_regs
into a new function.
Fixes selftest on AArch64.
gdb/ChangeLog:
* aarch64-tdep.c (aarch64_analyze_prologue_test): Reset saved regs.
* trad-frame.c (trad_frame_reset_saved_regs): New function.
(trad_frame_alloc_saved_regs): Call trad_frame_reset_saved_regs.
* trad-frame.h (trad_frame_reset_saved_regs): New declaration.
__rel[a]_iplt_start and __rel[a]_iplt_end are defined to handle IFUNC in
static executables. For PIE, since IFUNC is handled as the part of the
normal dynamic relocation processing, there is no need to define these
symbols in PIE.
* scripttempl/elf.sc (CREATE_PIC): New. Set for CREATE_SHLIB or
CREATE_PIE.
(__rel_iplt_start): Don't define for CREATE_PIC.
(__rel_iplt_end): Likewise.
(__rela_iplt_start): Likewise.
(__rela_iplt_end): Likewise.
This commit fixes some failures in gdb.base/interrupt.exp
when debugging a 32-bit i386 linux inferior from an amd64 host.
When running the following test...
make check RUNTESTFLAGS="--target_board unix/-m32 interrupt.exp"
... without this commit, I see the following output:
FAIL: gdb.base/interrupt.exp: continue (the program exited)
FAIL: gdb.base/interrupt.exp: echo data
FAIL: gdb.base/interrupt.exp: Send Control-C, second time
FAIL: gdb.base/interrupt.exp: signal SIGINT (the program is no longer running)
ERROR: Undefined command "".
ERROR: GDB process no longer exists
=== gdb Summary ===
When the test is run with this commit in place, we see 12 passes
instead. This is the desired behavior.
Analysis:
On Linux, when a syscall is interrupted by a signal, the syscall
may return -ERESTARTSYS when a signal occurs. Doing so indicates that
the syscall is restartable. Then, depending on settings associated
with the signal handler, and after the signal handler is called, the
kernel can then either return -EINTR or can cause the syscall to be
restarted. In this discussion, we are concerned with the latter
case.
On i386, the kernel returns this status via the EAX register.
When debugging a 32-bit (i386) process from a 64-bit (amd64)
GDB, the debugger fetches 64-bit registers even though the
process being debugged is 32-bit. Since we're debugging a 32-bit
target, only 32 bits are being saved in the register cache.
Now, ideally, GDB would save all 64-bits in the regcache and
then would be able to restore those same values when it comes
time to continue the target. I've looked into doing this, but
it's not easy and I don't see many benefits to doing so. One
benefit, however, would be that EAX would appear as a negative
value for doing syscall restarts.
At the moment, GDB is setting the high 32 bits of RAX (and other
registers too) to 0. So, when GDB restores EAX just prior to
a syscall restart, the high 32 bits of RAX are zeroed, thus making
it look like a positive value. For this particular purpose, we
need to sign extend EAX so that RAX will appear as a negative
value when EAX is set to -ERESTARTSYS. This in turn will cause
the signal handling code in the kernel to recognize -ERESTARTSYS
which will in turn cause the syscall to be restarted.
This commit is based on work by Jan Kratochvil from 2009:
https://sourceware.org/ml/gdb-patches/2009-11/msg00592.html
Jan's patch had the sign extension code in amd64-nat.c. Several
other native targets make use of this code, so it seemed better
to move the sign extension code to a linux specific file. I
also added similar code to gdbserver.
Another approach is to fix the problem in the kernel. Hui Zhu
tried to get a fix into the kernel back in 2014, but it was not
accepted. Discussion regarding this approach may be found here:
https://lore.kernel.org/patchwork/patch/457841/
Even if a fix were to be put into the kernel, we'd still need
some kind of fix in GDB in order to support older kernels.
Finally, I'll note that Fedora has been carrying a similar patch for
at least nine years. Other distributions, including RHEL and CentOS
have picked up this change and have been using it too.
gdb/ChangeLog:
* amd64-linux-nat.c (amd64_linux_collect_native_gregset): New
function.
(fill_gregset): Call amd64_linux_collect_native_gregset instead
of amd64_collect_native_gregset.
(amd64_linux_nat_target::store_registers): Likewise.
gdb/gdbserver/ChangeLog:
* linux-x86-low.c (x86_fill_gregset): Sign extend EAX value
when using a 64-bit gdbserver.
PR 89394
* cp-demangle.c (cplus_demangle_fill_name): Reject negative
lengths.
(d_count_templates_scopes): Replace num_templates and num_scopes
parameters with a struct d_print_info pointer parameter. Adjust
body of the function accordingly. Add recursion counter and check
that the recursion limit is not reached.
(d_print_init): Pass dpi parameter to d_count_templates_scopes.
Reset recursion counter afterwards, unless the recursion limit was
reached.
This introduces a new iterator and range adapter for iteration over
the separate debug files of a given objfile. As in the current
approach, the requested objfile is returned first, followed by the
separate debug objfiles.
gdb/ChangeLog
2019-04-10 Tom Tromey <tom@tromey.com>
* symtab.c (lookup_global_symbol_from_objfile)
(lookup_symbol_in_objfile_from_linkage_name): Use the iterator.
* objfiles.h (class separate_debug_iterator): New.
(class separate_debug_range): New.
(struct objfile) <separate_debug_objfiles>: New method.
(objfile_separate_debug_iterate): Don't declare.
* objfiles.c (separate_debug_iterator::operator++): Rename from
objfile_separate_debug_iterate.
(objfile_relocate, objfile_rebase, objfile_has_symbols): Use the
iterator.
* minsyms.c (lookup_minimal_symbol_by_pc_section): Use the
iterator.
While working on objfiles I noticed a typo in one comment, and another
comment that, as far as I can tell, has been obsolete for a very long
time.
gdb/ChangeLog
2019-04-10 Tom Tromey <tom@tromey.com>
* symfile.c (reread_symbols): Remove old comment.
* objfiles.c (free_all_objfiles): Fix a typo.
The "object_files" macro is sometimes used when iterating over
objfiles. This patch removes a few such uses in favor of the new
range adapter.
gdb/ChangeLog
2019-04-10 Tom Tromey <tom@tromey.com>
* ia64-tdep.c (ia64_get_dyn_info_list): Use foreach.
* minsyms.c (lookup_minimal_symbol): Use foreach.
(lookup_minimal_symbol_text, lookup_minimal_symbol_by_pc_name)
(lookup_minimal_symbol_solib_trampoline): Likewise.
* symfile.c (reread_symbols): Use foreach.
The fix H.J. implemented for PR gas/22791 in the thread starting at
[PATCH] x86-64: Treat PC32 relocation with branch as PLT32
https://sourceware.org/ml/binutils/2018-02/msg00065.html
is causing problems on Solaris/x86. The native linker is strongly
preferred there, and there's no intention of implementing the linker
optimization he plans there. Besides, the kernel runtime linker,
otherwise has no need to deal with that reloc at all, and instead of
adding (possibly even more) workarounds with no benefit, it seems
appropriate to disable the R_X86_64_PLT32 generation as branch marker on
Solaris/x86 in the first place.
The patch itself is trivial, the only complication is adapting the
testsuite. Since I've found no way to have conditional sections in the
.d files, I've instead used the solution already found elsewhere of
having separate .d files for the affected tests in an i386/solaris
subdirectory and skipping the original ones.
Tested on amd64-pc-solaris2.11 and x86_64-pc-linux-gnu without
regressions.
* config/tc-i386.c (need_plt32_p) [TE_SOLARIS]: Return FALSE.
* testsuite/gas/i386/solaris/solaris.exp: New driver.
* testsuite/gas/i386/solaris/reloc64.d,
testsuite/gas/i386/solaris/x86-64-jump.d,
testsuite/gas/i386/solaris/x86-64-mpx-branch-1.d,
testsuite/gas/i386/solaris/x86-64-mpx-branch-2.d,
testsuite/gas/i386/solaris/x86-64-nop-3.d,
testsuite/gas/i386/solaris/x86-64-nop-4.d,
testsuite/gas/i386/solaris/x86-64-nop-5.d,
testsuite/gas/i386/solaris/x86-64-relax-2.d,
testsuite/gas/i386/solaris/x86-64-relax-3.d: New tests.
* testsuite/gas/i386/reloc64.d,
testsuite/gas/i386/x86-64-jump.d,
testsuite/gas/i386/x86-64-mpx-branch-1.d,
testsuite/gas/i386/x86-64-mpx-branch-2.d,
testsuite/gas/i386/x86-64-nop-3.d,
testsuite/gas/i386/x86-64-nop-4.d,
testsuite/gas/i386/x86-64-nop-5.d,
testsuite/gas/i386/x86-64-relax-2.d,
testsuite/gas/i386/x86-64-relax-3.d: Skip on *-*-solaris*.
This fixes the csky-elf ld-elf/pr21884 and ld-unique/pr21529 failures,
by disabling branch stubs for binary (and other non-csky) output.
The csky-linux target gets branch stubs off by default because
presumably there are reasons why branch stubs were disabled, but
rather than killing the support completely it can be enabled by
--branch-stub.
* emultempl/cskyelf.em (csk_elf_before_parse): New function,
setting use_branch_stub false for linux.
(csky_elf_create_output_section_statements): Do emit this
function and all others in the file for linux, plus the branch
option control. Disable branch stubs when non-ELF.
In looking at the csky-elf vs. csky-linux differences, the first thing
I compared was csky_elf.sh and cskyelf_linux.sh. Those files are
mostly the same but besides the real differences, annoyingly have some
lines ordered differently. It's better in such cases to have one file
source the other, making differences plain. This patch does that for
csky and microblaze, removes an unused variable defined in a few
places, and fixes ld makefile dependencies.
* Makefile.am (eskyelf.c, eskyelf_linux.c): Depend on cskyelf.em.
(ecskyelf_linux.c): Depend on cskyelf.sh.
(eelf32microblazeel.c): Depend on elf32microblaze.sh.
* Makefile.in: Regenerate.
* emulparams/cskyelf.sh: Comment regarding cskelf_linux.sh.
(PAGE_SIZE): Don't define.
* emulparams/cskyelf_linux.sh: Source sckyelf.sh, leaving just
the differing variable defs/undefs.
* emulparams/elf32mcore.sh (PAGE_SIZE): Don't define.
* emulparams/elf32microblaze.sh: Comment re. elf32microblazeel.sh.
(OUTPUT_FORMAT): Use BIG_OUTPUT_FORMAT.
(PAGE_SIZE): Don't define.
* emulparams/elf32microblazeel.sh: Source elf32microblaze.sh,
leaving just the differing OUTPUT_FORMAT.
This patch is aimed a fixing large numbers of x86_64-cloudabi failures
caused by gas selecting the wrong target name.
* config/te-cloudabi.h: New file.
* config/tc-aarch64.c (aarch64_after_parse_args): Use TE_CLOUDABI
rather than TARGET_OS to select cloudabi.
* config/tc-i386.h (ELF_TARGET_FORMAT64): Define for TE_CLOUDABI.
* configure.tgt (*-*-cloudabi*): Set em=cloudabi.
PR rust/24414 points out that the Rust lexer uses strtoul when lexing
an integer, and that this can give the wrong results in some
situations.
This patch changes it to use strtoulst, like most of the rest of gdb.
It also adds a self test.
Tested on x86-64 Fedora 29 using an i686 build.
gdb/ChangeLog
2019-04-09 Ivan Begert <ivanbegert@gmail.com>
Tom Tromey <tromey@adacore.com>
PR rust/24414:
* rust-exp.y (rust_parser::lex_number): Use strtoulst.
(rust_lex_int_test): Change "value" to be LONGEST.
(rust_lex_tests): Add test for long integer literal.
I noticed that find_thread_in_random duplicates the code in
find_thread_in_random, so this patch changes the latter to use the
former.
There are two other spots in gdb that do this, but to unify all of
them would require switching some code from using the "iterate over"
idiom to using iterators.
Another possible improvement is that find_thread_in_random could be
made single-pass using reservoir sampling.
Tested by the buildbot.
gdb/gdbserver/ChangeLog
2019-04-09 Tom Tromey <tromey@adacore.com>
* linux-low.c (select_event_lwp): Use find_thread_in_random.
I noticed a few spots where fake_pid_p is handled as an int, whereas
the field in struct inferior has type bool. This patch changes the
remaining places to use bool as well.
Tested by the buildbot.
gdb/ChangeLog
2019-04-09 Tom Tromey <tromey@adacore.com>
* remote.c (remote_target::remote_add_inferior): Change fake_pid_p
to bool.
(extended_remote_target::attach): Update.
(remote_target::remote_notice_new_inferior): Update.
(remote_target::add_current_inferior_and_thread): Update.
* inferior.c (exit_inferior_1): Use "false".
* corelow.c (add_to_thread_list): Make fake_pid_p bool.
When using the "start" command, GDB puts a temporary breakpoint on the
"main" symbol (we literally invoke the tbreak command). However, since
it does wild matching by default, it also puts a breakpoint on any C++
method or "main" function in a namespace. For example, when debugging
GDB, it creates a total of 24 locations:
(gdb) start
Temporary breakpoint 1 at 0x198c1e9: main. (24 locations)
as there are a bunch of methods called main in the selftests, such as
selftests::string_view::capacity_1::main()
If such method was called in the constructor of a global object, or a
function marked with the attribute "constructor", then we would stop at
the wrong place. Also, this causes a few extra symtabs (those that
contain the "wrong" mains) to be expanded for nothing.
The dummiest, most straightforward solution is to add -qualified when
invoking tbreak. With this patch, "start" creates a single-location
breakpoint, as expected.
I copied the start.exp test to start-cpp.exp and made it use a C++ test
file, which contains two main functions. The new test verifies that the
output of "start" is the output we get when we set a single-location
breakpoint.
gdb/ChangeLog:
* infcmd.c (run_command_1): Pass -qualified to tbreak when usind
the "start" command.
gdb/testsuite/ChangeLog:
* gdb.base/start-cpp.exp: New file.
* gdb.base/start-cpp.cc: New file.
In Release 6 of the MIPS architecture [1], instruction RDHWR supports
a 3rd operand to serve as the 3-bit select field for the hardware
register.
[1] "MIPS Architecture for Programmers Volume II-A: The MIPS32
Instruction Set Manual", Imagination Technologies Ltd., Document
Number: MD00086, Revision 6.06, December 15, 2016, Section 3.2
"Alphabetical List of Instructions", pp. 332-334
opcodes/
* mips-opc.c (mips_builtin_opcodes): Add RDHWR rt rd sel.
gas/
* testsuite/gas/mips/mips.exp: Run hwr-names test.
* testsuite/gas/mips/hwr-names.s: Add test cases for RDHWR with
the SEL field.
* testsuite/gas/mips/mipsr6@hwr-names.d: New file.
This renaming was done to stay consistent with the naming of the new
gdb.InferiorThread.handle method. I had initially named it "thread_handle"
but Tom Tromey suggested just "handle".
The old name (thread_from_thread_handle) still works, but is marked as
deprecated in comments in the code as well as in the documentation.
I have some code which uses these functions. I very much like the
brevity of the new names.
gdb/doc/ChangeLog:
* python.texi (Inferiors In Python): Rename
Inferior.thread_from_thread_handle to Inferior.thread_from_handle.
Add note about the former being deprecated.
gdb/ChangeLog:
* python/py-inferior.c (infpy_thread_from_thread_handle):
Adjust comments to reflect renaming of thread_from_thread_handle
to thread_from_handle. Adjust keywords. Fix type error message.
(inferior_object_methods): Add thread_from_handle. Retain
thread_from_thread_handle, but mark it as deprecated.
testsuite/ChangeLog:
* gdb.python/py-thrhandle.exp: Adjust tests to call
thread_from_handle instead of thread_from_thread_handle.
InferiorThread.handle() returns a python bytes object. We'd like to
be able to pass the output of this function, a thread handle, to
Inferior.thread_from_thread_handle(). Up to now,
thread_from_thread_handle() expects to receive a gdb.Value input.
This commit adds support to also allow a python buffer object to be
passed as the handle.
infpy_thread_from_thread_handle() calls find_thread_by_handle() which
has the obvious functionality. It used to pass the thread handle via
a struct value pointer. I've revised this interface to instead pass a
gdb::array_view<const gdb_byte> object. (Thanks to Tom Tromey for
suggesting this data structure over an earlier version which passed a
gdb_byte pointer and length.)
gdb/ChangeLog:
* gdbthread.h (find_thread_by_handle): Revise declaration.
* thread.c (find_thread_by_handle): Likewise. Adjust
implementation too.
* python/py-inferior.c (infpy_thread_from_thread_handle): Add
support for buffer objects as handles.
- Explicitly include <string> for std::string.
- Use std::make_shared to construct gdb_exception::message instead of
operator new, avoiding one heap allocation (2 instead of 3). Add
'const char *fmt, va_list ap' parameters to
gdb_exception{,error,quit}'s ctors, and do the std::make_shared in
the gdb_exception ctor.
- gdb_exception_error's constructor does not need to have an 'enum
return_reason' parameter, since it is always RETURN_ERROR, by
definition.
- Similarly, gdb_exception_quit's contructor does not need to have
'enum return_reason'/'enum errors' parameters.
- In the gdb_exception_{quit,_error} ctors that take a gdb_exception
as argument, assert that they're being passed a gdb_exception object
of the right 'reason'.
gdb/ChangeLog:
2019-04-08 Pedro Alves <palves@redhat.com>
* common/common-exceptions.c (throw_exception): Don't create
named object to throw; throw directly.
(throw_it): Likewise. Don't initialize gdb_exception::message
here, with new; pass FMT and AP to the ctor instead.
* common/common-exceptions.h: Include <string>.
(gdb_exception::gdb_exception(enum return_reason, enum errors,
const char *, va_list)): New ctor. Use std::make_shared.
(gdb_exception_error::gdb_exception_error(enum return_reason, enum
errors)): Delete.
(gdb_exception_error::gdb_exception_error(enum errors, const char
*, va_list)): New.
(gdb_exception_error::gdb_exception_error(const gdb_exception &)):
Add assertion.
(gdb_exception_quit::gdb_exception_quit(enum return_reason, enum
errors)): Delete.
(gdb_exception_quit::gdb_exception_quit(const char *, va_list)): New.
(gdb_exception_quit::gdb_exception_quit(const gdb_exception &)):
Add assertion.
Tom Tromey
Max Filippov
Faraz Shahbazker
Tom de Vries
H.J. Lu
Alan Modra
Tamar Christina
Sudakshina Das
Alan Hayward
Kevin Buettner
GDB Administrator
Nick Clifton
Tom Tromey
Michael Forney
Rainer Orth
Simon Marchi
Robert Suchanek
Pedro Alves