Bruno Larsen [Mon, 2 Jan 2023 13:35:50 +0000 (14:35 +0100)]
gdb/mi: add no-history stop reason
When executing in reverse and runs out of recorded history, GDB prints
a warning to the user, but does not add a reason in the stopped record,
for example:
*stopped,frame={addr="0x000000000040113e",func="main",args=[],file="/home/blarsen/Documents/fsf_build/gdb/testsuite/../../../binutils-gdb/gdb/testsuite/gdb.reverse/solib-reverse.c",fullname="/home/blarsen/Documents/binutils-gdb/gdb/testsuite/gdb.reverse/solib-reverse.c",line="27",arch="i386:x86-64"},thread-id="1",stopped-threads="all",core="1"
This problem was reported as record/29260.
This commit adds the reason no-history to the record, making it easier
for interfaces using the mi interpreter to report the result. It also
changes the test gdb.mi/mi-reverse.exp to test that the reason shows up
correctly.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=29260
Bruno Larsen [Tue, 3 Jan 2023 14:07:47 +0000 (15:07 +0100)]
gdb/testsuite: Fix FAILs in gdb.linespec/cpcompletion.exp when using clang
When using clang 16.0.0 to test gdb.linespec/cpcompletion.exp, I get 99
unexpected failures. They all fail to produce a complete list of
completion options for a function, either overload2_function,
overload3_function or anon_ns_function. This happens because clang is
optimizing them away, since they are never used.
Fix this by adding __attribute__((used)) to all declarations to the
aforementioned functions.
Clément Chigot [Tue, 3 Jan 2023 13:24:43 +0000 (14:24 +0100)]
configure: remove dependencies on gmp and mpfr when gdb is disabled
Since
991180627851801f1999d1ebbc0e569a17e47c74, the configure checks
about GMP and MPFR for gdb builds have been moved to the toplevel
configure.
However, it doesn't take into account the --disable-gdb option. Meaning
that a build without gdb will require these libraries even if not
needed.
ChangeLog:
* configure.ac: Skip GMP and MPFR when --disable-gdb is
provided.
* configure: Regenerate.
GDB Administrator [Fri, 6 Jan 2023 00:00:25 +0000 (00:00 +0000)]
Automatic date update in version.in
Simon Marchi [Wed, 4 Jan 2023 21:15:02 +0000 (16:15 -0500)]
gdbsupport: fix scoped_debug_start_end's move constructor
I spotted a problem with scoped_debug_start_end's move constructor.
When constructing a scoped_debug_start_end through it, it doesn't
disable the moved-from object, meaning there are now two objects that
will do the side-effects of decrementing the debug_print_depth global
and printing the "end" message. Decrementing the debug_print_depth
global twice is actually problematic, because the increments and
decrements get out of sync, meaning we should hit this assertion, in
theory:
gdb_assert (debug_print_depth > 0);
However, in practice, we don't see that. This is because despite the
move constructor being required for this to compile:
template<typename PT>
static inline scoped_debug_start_end<PT &> ATTRIBUTE_NULL_PRINTF (6, 7)
make_scoped_debug_start_end (PT &&pred, const char *module, const char *func,
const char *start_prefix,
const char *end_prefix, const char *fmt, ...)
{
va_list args;
va_start (args, fmt);
auto res = scoped_debug_start_end<PT &> (pred, module, func, start_prefix,
end_prefix, fmt, args);
va_end (args);
return res;
}
... it is never actually called, because compilers elide the move
constructors all the way (the scoped_debug_start_end gets constructed
directly in the instance of the top-level caller). To confirm this, I
built GDB with -fno-elide-constructors, and now I see it:
/home/simark/src/binutils-gdb/gdb/../gdbsupport/common-debug.h:147: internal-error: ~scoped_debug_start_end: Assertion `debug_print_depth > 0' failed.
#9 0x00005614ba5f17c3 in internal_error_loc (file=0x5614b8749960 "/home/simark/src/binutils-gdb/gdb/../gdbsupport/common-debug.h", line=147, fmt=0x5614b8733fa0 "%s: Assertion `%s' failed.") at /home/simark/src/binutils-gdb/gdbsupport/errors.cc:58
#10 0x00005614b8e1b2e5 in scoped_debug_start_end<bool&>::~scoped_debug_start_end (this=0x7ffc6c5e7b40, __in_chrg=<optimized out>) at /home/simark/src/binutils-gdb/gdb/../gdbsupport/common-debug.h:147
#11 0x00005614b96dbe34 in make_scoped_debug_start_end<bool&> (pred=@0x5614baad7200: true, module=0x5614b891d840 "infrun", func=0x5614b891d800 "infrun_debug_show_threads", start_prefix=0x5614b891d7c0 "enter", end_prefix=0x5614b891d780 "exit", fmt=0x0) at /home/simark/src/binutils-gdb/gdb/../gdbsupport/common-debug.h:235
Fix this by adding an m_disabled field to scoped_debug_start_end, and
setting it in the move constructor.
Change-Id: Ie5213269c584837f751d2d11de831f45ae4a899f
Simon Marchi [Thu, 20 Oct 2022 17:05:19 +0000 (13:05 -0400)]
gdbsupport: add gdb::string_view_hash
Add the string_view_hash type, which will be useful to be able to use
gdb::string_view as std::unordered_map keys.
Use it in gdb/symtab.c, to exercise it.
Change-Id: Id69a466ab19a9f6620b5df8a2dd29b5cddd94c00
Approved-By: Andrew Burgess <aburgess@redhat.com>
Simon Marchi [Thu, 20 Oct 2022 16:48:27 +0000 (12:48 -0400)]
gdbsupport: move fast_hash to gdbsupport/common-utils.h
The following patch adds a hash type for gdb::string_view in gdbsupport,
which will use the fast_hash function. Move the latter to gdbsupport.
Change-Id: Id74510e17801e775bd5ffa5f443713d79adf14ad
Approved-By: Andrew Burgess <aburgess@redhat.com>
Simon Marchi [Thu, 20 Oct 2022 16:47:07 +0000 (12:47 -0400)]
gdbsupport: move libxxhash configure check to gdbsupport
The following patch moves the fast_hash function, which uses libxxhash,
to gdbsupport. Move the libxxhash configure check to gdbsupport (and
transitively to gdbserver).
Change-Id: I242499e50c8cd6fe9f51e6e92dc53a1b3daaa96e
Approved-By: Andrew Burgess <aburgess@redhat.com>
Simon Marchi [Mon, 3 Oct 2022 15:15:14 +0000 (11:15 -0400)]
gdb: make gdbarch_alloc take ownership of the tdep
It's currently not clear how the ownership of gdbarch_tdep objects
works. In fact, nothing ever takes ownership of it. This is mostly
fine because we never free gdbarch objects, and thus we never free
gdbarch_tdep objects. There is an exception to that however: when
initialization fails, we do free the gdbarch object that is not going to
be used, and we free the tdep too. Currently, i386 and s390 do it.
To make things clearer, change gdbarch_alloc so that it takes ownership
of the tdep. The tdep is thus automatically freed if the gdbarch is
freed.
Change all gdbarch initialization functions to pass a new gdbarch_tdep
object to gdbarch_alloc and then retrieve a non-owning reference from
the gdbarch object.
Before this patch, the xtensa architecture had a single global instance
of xtensa_gdbarch_tdep. Since we need to pass a dynamically allocated
gdbarch_tdep_base instance to gdbarch_alloc, remove this global
instance, and dynamically allocate one as needed, like we do for all
other architectures. Make the `rmap` array externally visible and
rename it to the less collision-prone `xtensa_rmap` name.
Change-Id: Id3d70493ef80ce4bdff701c57636f4c79ed8aea2
Approved-By: Andrew Burgess <aburgess@redhat.com>
Simon Marchi [Thu, 5 Jan 2023 16:23:45 +0000 (11:23 -0500)]
gdb/testsuite: add back needed -re clause in gdb_breakpoint
Commit
4b9728be ("gdb: use gdb_test_multiple in gdb_breakpoint") caused,
amongst others:
(gdb) break 1^M
No line 1 in the current file.^M
Make breakpoint pending on future shared library load? (y or [n]) n^M
(gdb) FAIL: gdb.dwarf2/dw2-main-no-line-number.exp: gdb_breakpoint: set breakpoint at 1
FAIL: gdb.dwarf2/dw2-main-no-line-number.exp: !$breakpoint_at_missing_lineno_set
This is because it removed one empty -re clause (matching just the
prompt) that is necessary after replying "n" to the pending breakpoint
question. Add this clause back.
Change-Id: Ibfaa059d58bbea660bc29f0547e2f75c323fcbc6
Approved-By: Tom de Vries <tdevries@suse.de>
Tom de Vries [Thu, 5 Jan 2023 16:35:41 +0000 (17:35 +0100)]
[gdb/python] Avoid queue.SimpleQueue for python 3.6
On openSUSE Leap 15.4 with python 3.6, the gdb.dap/basic-dap.exp test-case
fails as follows:
...
ERROR: eof reading json header
while executing
"error "eof reading json header""
invoked from within
"expect {
-i exp19 -timeout 10
-re "^Content-Length: (\[0-9\]+)\r\n" {
set length $expect_out(1,string)
exp_continue
}
-re "^(\[^\r\n\]+)..."
("uplevel" body line 1)
invoked from within
"uplevel $body" NONE eof reading json header
UNRESOLVED: gdb.dap/basic-dap.exp: startup - initialize
...
Investigation using a "catch throw" shows that:
...
(gdb)
at gdb/python/py-utils.c:396
396 error (_("Error occurred in Python: %s"), msg.get ());
(gdb) p msg.get ()
$1 = 0x2b91d10 "module 'queue' has no attribute 'SimpleQueue'"
...
The python class queue.SimpleQueue was introduced in python 3.7.
Fix this by falling back to queue.Queue for python <= 3.6.
Tested on x86_64-linux, by successfully running the test-case:
...
# of expected passes 47
...
Tom Tromey [Mon, 2 Jan 2023 17:24:26 +0000 (10:24 -0700)]
Add type to expression dump of symbol
I recently had cause to dump some expressions from gdb. I got output
like this:
Operation: BINOP_GTR
Operation: OP_VAR_VALUE
Block symbol:
Symbol: small_value
Block: 0x39b4c20
Operation: OP_LONG
Operation: OP_LONG
Type: int
Constant: 0x0000000000000014
This is ok, but it would have been handy to see the type of the
symbol. This patch adds this information.
Reviewed-By: Bruno Larsen <blarsen@redhat.com>
Nick Clifton [Thu, 5 Jan 2023 14:40:16 +0000 (14:40 +0000)]
Remove Stephen Casner as the PDP11 maintainer.
Nick Clifton [Thu, 5 Jan 2023 11:00:35 +0000 (11:00 +0000)]
Add an extra emulation called arm64pe to the aarch64pe emulation.
Andreas K. Huettel [Thu, 5 Jan 2023 08:35:18 +0000 (08:35 +0000)]
Un xfail the PR19719 test for the AArch64 architecture
Nick Clifton [Thu, 5 Jan 2023 08:27:35 +0000 (08:27 +0000)]
Updated Bulgarian and Russian translations for the gprof subdirectory
Paul Koning [Wed, 4 Jan 2023 22:29:00 +0000 (22:29 +0000)]
PR29963, PDP11 link produces spurious relocation truncated messages
PDP11 is a 16-bit processor with 16-bit logical addresses. Therefore
wrapping should be allowed on the 16-bit relocs, and may as well be
allowed for the 32-bit reloc too.
PR 29963
* pdp11.c (howto_table_pdp11): Use complain_overflow_dont.
Mike Frysinger [Tue, 3 Jan 2023 06:58:23 +0000 (01:58 -0500)]
sim: mips: add multi source to built sources
The multirun generation mode is a bit of a mess as generated run files
depend on generate igen files, all with unknown names ahead of time.
In the multirun mode, be lazy and declare all of these generated source
files as built sources so they'll be created early on.
Tsukasa OI [Wed, 4 Jan 2023 01:33:29 +0000 (01:33 +0000)]
sim: Move getopt checking inside SIM_AC_PLATFORM
This commit moves getopt declaration checker originally in sim/
configure.ac; added in commit
340aa4f6872c ("sim: Check known getopt
definition existence") to sim/m4/sim_ac_platform.m4 (inside the
SIM_AC_PLATFORM macro).
It also regenerates configuration files using the maintainer mode.
Guillermo E. Martinez [Wed, 4 Jan 2023 21:41:09 +0000 (15:41 -0600)]
sim: bpf: fix testsuite due to linker warnings [PR sim/29954]
On a bpf-*-* testsuite fails:
./ld/ld-new: warning: test has a LOAD segment with RWX permissions
Adjusting `--memory-size=10Mb' to the simulator bpf testsuite passes.
Tested on bpf-*-*:
Bug: https://sourceware.org/PR29954
sim/testsuite:
* bpf/allinsn.exp (SIMFLAGS_FOR_TARGET): Adjust sim flags.
GDB Administrator [Thu, 5 Jan 2023 00:00:22 +0000 (00:00 +0000)]
Automatic date update in version.in
Indu Bhagat [Wed, 4 Jan 2023 00:45:17 +0000 (16:45 -0800)]
MAINTAINERS: add myself as maintainer of libsframe
binutils/
* MAINTAINERS: Add myself as maintainer of libsframe.
H.J. Lu [Wed, 4 Jan 2023 19:09:50 +0000 (11:09 -0800)]
x86: Remove duplicated I386_PCREL_TYPE_P/X86_64_PCREL_TYPE_P
I386_PCREL_TYPE_P and X86_64_PCREL_TYPE_P are defined twice. Remove
the duplications.
* elfxx-x86.h (I386_PCREL_TYPE_P): Remove duplication.
(X86_64_PCREL_TYPE_P): Likewise.
Lancelot SIX [Wed, 4 Jan 2023 17:58:08 +0000 (17:58 +0000)]
gdb: ensure test_name is initialized in gdb_breakpoint
A refactoring in
4b9728bec15 (gdb: use gdb_test_multiple in
gdb_breakpoint) left the $test_name variable undefined.
This patch fixes this.
Approved-By: Simon Marchi <simon.marchi@efficios.com>
Tom Tromey [Mon, 19 Dec 2022 18:15:55 +0000 (11:15 -0700)]
Use first_opcode in another spot
I found one place that could use expression::first_opcode.
Reviewed-By: Lancelot Six <lancelot.six@amd.com>
Tom Tromey [Mon, 19 Dec 2022 18:14:02 +0000 (11:14 -0700)]
Convert exp_uses_objfile to a method of expression
This changes the exp_uses_objfile function to be a method of
'expression'.
Reviewed-By: Lancelot Six <lancelot.six@amd.com>
Simon Marchi [Tue, 3 Jan 2023 19:22:16 +0000 (14:22 -0500)]
gdb: use gdb_test_multiple in gdb_breakpoint
When running the testsuite in a non-optimized build on a slow machine, I
sometimes get:
UNTESTED: gdb.gdb/selftest.exp: Cannot set breakpoint at captured_main, skipping testcase.
do_self_tests, in lib/selftest-support.exp, uses `with_timeout_factor
10`, to account for the fact that reading the debug info of the gdb
binary (especially in a non-optimized GDB) can take time. But then it
ends up calling gdb_breakpoint, which uses gdb_expect with a hard-coded
timeout of 30 seconds.
Fix this by making gdb_breakpoint use gdb_test_multiple, which is a
desired change anyway for this kind of simple command / expected
output case.
Change-Id: I9b06ce991cc584810d8cc231b2b4893980b8be75
Reviewed-By: Lancelot Six <lancelot.six@amd.com>
Alan Modra [Wed, 4 Jan 2023 13:20:12 +0000 (23:50 +1030)]
Re: Avoid unaligned pointer reads in PEP .idata section
Fix testsuite fallout.
* testsuite/ld-pe/cfi.d: Adjust for changed .idata padding.
* testsuite/ld-pe/secidx_64.d: Likewise.
* testsuite/ld-pe/secrel_64.d: Likewise.
Alan Modra [Wed, 4 Jan 2023 12:30:12 +0000 (23:00 +1030)]
objcopy fuzzed pe out of memory
This occurs when attempting to read back a section from the output
file in _bfd_XX_bfd_copy_private_bfd_data_common. The copy of the
section failed size sanity checking, thus it won't be written.
* objcopy.c (copy_object): Return false if copy_section or
copy_relocations_in_section fails.
Alan Modra [Wed, 4 Jan 2023 11:16:06 +0000 (21:46 +1030)]
fuzzed file timeout
objcopy of archive, element containing an object with a fuzzed section
size far exceeding the element size. copy_section detects this, but
the temp file is laid out for the large section. It can take a long
time to write terabytes of sparse file, a waste of time when it will
be deleted.
* objcopy.c (copy_archive): Don't write element contents after
bad status result from copy_object.
Alan Modra [Wed, 4 Jan 2023 11:13:54 +0000 (21:43 +1030)]
asan: segv in parse_module
* vms-alpha.c (parse_module): Ignore DST__K_SRC_SETFILE data
if out of range.
Alan Modra [Wed, 4 Jan 2023 11:09:54 +0000 (21:39 +1030)]
addr2line out of memory on fuzzed file
Another case of fuzzers finding the section size sanity checks are
avoided with SHT_NOBITS sections.
* dwarf2.c (read_section): Check that the DWARF section being
read has contents.
Andrew Burgess [Wed, 4 Jan 2023 11:36:57 +0000 (11:36 +0000)]
gdb: fix some #ifdef logic in bt-utils.h
In passing I spotted some incorrect #ifdef logic in bt-utils.h. The
logic in question has existed since the file was originally added in
commit:
commit
abbbd4a3e0ca51132e7fb31a43f896d29894dae0
Date: Wed Aug 11 13:24:33 2021 +0100
gdb: use libbacktrace to create a better backtrace for fatal signals
The code is trying to select between using libbacktrace or using the
execinfo supplied backtrace API.
First we check to see if we can use libbacktrace. If we can then we
include some header files, and then set some defines to indicate that
libbacktrace is being used.
Then we check if execinfo is available, if it is then we include
<execinfo.h> and set some alternative defines.
In theory the second block of logic should not trigger if the first
block (that uses libbacktrace) has also triggered, but we incorrectly
check the define 'PRINT_BACKTRACE_ON_FATAL_SIGNAL' instead of checking
for 'GDB_PRINT_INTERNAL_BACKTRACE_USING_LIBBACKTRACE', so the second
block triggers more than it should. The
'PRINT_BACKTRACE_ON_FATAL_SIGNAL' define is not defined anywhere, this
was a mistake in the original commit.
In reality this is harmless, we include <execinfo.h> when we don't
need too, but in by-utils.c the libbacktrace define is always checked
for before the execinfo define, so we never actually end up using the
execinfo path (when libbacktrace is available). But I figure its
still worth cleaning this up.
I've tested GDB in a "default" build where libbacktrace is used, and
when configuring with --disable-libbacktrace which causes the execinfo
backtrace API to be used instead, both still appear to work fine.
There should be no user visible changes after this commit.
Bruno Larsen [Thu, 3 Nov 2022 09:17:36 +0000 (10:17 +0100)]
gdb: add 'maintenance print record-instruction' command
While chasing some reverse debugging bugs, I found myself wondering what
was recorded by GDB to undo and redo a certain instruction. This commit
implements a simple way of printing that information.
If there isn't enough history to print the desired instruction (such as
when the user hasn't started recording yet or when they request 2
instructions back but only 1 was recorded), GDB warns the user like so:
(gdb) maint print record-instruction
Not enough recorded history
If there is enough, GDB prints the instruction like so:
(gdb) maint print record-instruction
4 bytes of memory at address 0x00007fffffffd5dc changed from: 01 00 00 00
Register eflags changed: [ IF ]
Register rip changed: (void (*)()) 0x401115 <main+15>
Approved-by: Eli Zaretskii <eliz@gnu.org>
Reviewed-by: Alexandra Hajkova <ahajkova@redhat.com>
Reviewed-by: Lancelot Six <lsix@lancelotsix.com>
Approved-by: Tom Tromey <tom@tromey.com>
Andreas K. Huettel [Wed, 4 Jan 2023 09:30:14 +0000 (09:30 +0000)]
Fix AArch64 linker testsuite failures trigeered by differences in build environments.
PR 29843
* testsuite/ld-aarch64/bti-plt-5.d: Relax regxps slightly to allow
for differences in build environments.
* testsuite/ld-aarch64/tls-relax-gdesc-le-now.d: Likewise.
Mark Harmstone [Sat, 31 Dec 2022 20:55:46 +0000 (20:55 +0000)]
Avoid unaligned pointer reads in PEP .idata section
This is something I discovered when working on aarch64, though it's
relevant to x86_64 too.
The PE32+ imports are located in the .idata section, which starts off
with a 20-byte structure for each DLL, containing offsets into the rest
of the section. This is the Import Directory Table in
https://learn.microsoft.com/en-us/windows/win32/debug/pe-format, which
is a concatenation of the .idata$2 sections. This is then followed by an
20 zero bytes generated by the linker script, which calls this .idata$3.
After this comes the .idata$4 entries for each function, which the
loader overwrites with the function pointers. Because there's no padding
between .idata$3 and .idata$4, this means that if there's an even number
of DLLs, the function pointers won't be aligned on an 8-byte boundary.
Misaligned reads are slower on x86_64, but this is more important on
aarch64, as the e.g. `ldr x0, [x0, :lo12:__imp__func]` the compiler
might generate requires __imp__func (the .idata$4 entry) to be aligned
to 8 bytes. Without this you get IMAGE_REL_ARM64_PAGEOFFSET_12L overflow
errors.
Alan Modra [Wed, 4 Jan 2023 02:52:55 +0000 (13:22 +1030)]
Merge config/picflag.m4 from gcc
and regen libiberty/configure
Tsukasa OI [Wed, 4 Jan 2023 01:38:30 +0000 (01:38 +0000)]
sim: Regenerate using the maintainer mode
Those files have changed by regenerating using the maintainer mode.
The first line of sim/ppc/pk.h have changed by an effect of the commit
319e41e83a40 ("sim: ppc: inline the sim-packages option").
GDB Administrator [Wed, 4 Jan 2023 00:00:12 +0000 (00:00 +0000)]
Automatic date update in version.in
Max Filippov [Tue, 3 Jan 2023 06:56:28 +0000 (22:56 -0800)]
opcodes: xtensa: fix jump visualization for FLIX
opcodes/
* xtensa-dis.c (print_insn_xtensa): Add local variables
insn_type, target and imm_pcrel to track control flow across
multiple slots.
Max Filippov [Tue, 3 Jan 2023 05:17:53 +0000 (21:17 -0800)]
opcodes: xtensa: implement styled disassembly
opcodes/
* xtensa-dis.c (print_xtensa_operand)
(print_insn_xtensa): Replace fprintf_func with
fprintf_styled_func.
Tom Tromey [Thu, 8 Sep 2022 16:35:09 +0000 (10:35 -0600)]
Add test case for "finish" with variably-sized types
This adds a test case for "finish" with variably-sized types, and for
inferior calls as well. This also extends the "runto" proc to handle
temporary breakpoints.
Tom Tromey [Wed, 7 Sep 2022 20:01:13 +0000 (14:01 -0600)]
Use value_at_non_lval in get_call_return_value
get_call_return_value can handle RETURN_VALUE_STRUCT_CONVENTION,
because the call is completely managed by gdb. However, it does not
handle variably-sized types correctly. The simplest way to fix this
is to use value_at_non_lval, which does type resolution.
Tom Tromey [Wed, 7 Sep 2022 15:52:44 +0000 (09:52 -0600)]
Fix inferior calls with variably-sized return type
This patch updates the gdbarch_return_value_as_value implementations
to work correctly with variably-sized return types.
Tom Tromey [Fri, 9 Sep 2022 12:39:56 +0000 (06:39 -0600)]
Convert selected architectures to gdbarch_return_value_as_value
This converts a few selected architectures to use
gdbarch_return_value_as_value rather than gdbarch_return_value. The
architectures are just the ones that I am able to test. This patch
should not introduce any behavior changes.
Tom Tromey [Thu, 15 Sep 2022 18:06:02 +0000 (12:06 -0600)]
Don't let property evaluation affect the current language
On PPC, we saw that calling an inferior function could sometimes
change the current language, because gdb would select the call dummy
frame -- associated with _start.
This patch changes gdb so that the current language is never affected
by DWARF property evaluation.
Tom Tromey [Fri, 9 Sep 2022 18:50:33 +0000 (12:50 -0600)]
Introduce value_at_non_lval
In some cases, while a value might be read from memory, gdb should not
record the value as being equivalent to that memory.
In Ada, the inferior call code will call ada_convert_actual -- and
here, if the argument is already in memory, that address will simply
be reused. However, for a call like "f(g())", the result of "g" might
be on the stack and thus overwritten by the call to "f".
This patch introduces a new function that is like value_at but that
ensures that the result is non-lvalue.
Tom Tromey [Wed, 7 Sep 2022 14:58:18 +0000 (08:58 -0600)]
Don't emit gdbarch_return_value
The previous patch introduced a new overload of gdbarch_return_value.
The intent here is that this new overload always be called by the core
of gdb -- the previous implementation is effectively deprecated,
because a call to the old-style method will not work with any
converted architectures (whereas calling the new-style method is will
delegate when needed).
This patch changes gdbarch.py so that the old gdbarch_return_value
wrapper function can be omitted. This will prevent any errors from
creeping in.
Tom Tromey [Wed, 7 Sep 2022 14:39:52 +0000 (08:39 -0600)]
Add new overload of gdbarch_return_value
The gdbarch "return_value" can't correctly handle variably-sized
types. The problem here is that the TYPE_LENGTH of such a type is 0,
until the type is resolved, which requires reading memory. However,
gdbarch_return_value only accepts a buffer as an out parameter.
Fixing this requires letting the implementation of the gdbarch method
resolve the type and return a value -- that is, both the contents and
the new type.
After an attempt at this, I realized I wouldn't be able to correctly
update all implementations (there are ~80) of this method. So,
instead, this patch adds a new method that falls back to the current
method, and it updates gdb to only call the new method. This way it's
possible to incrementally convert the architectures that I am able to
test.
Tom Tromey [Tue, 6 Sep 2022 14:44:52 +0000 (08:44 -0600)]
Fix crash in amd64-tdep.c
amd64-tdep.c could crash when 'finish'ing from a function whose return
type had variable length. In this situation, the value will be passed
by reference, and this patch avoids the crash.
(Note that this does not fully fix the bug reported, but it does fix
the crash, so it seems worthwhile to land independently.)
Tom de Vries [Tue, 3 Jan 2023 15:41:05 +0000 (16:41 +0100)]
[gdb/testsuite] Add xfail in gdb.arch/i386-pkru.exp
On a x86_64-linux machine with pkru register, I run into:
...
(gdb) PASS: gdb.arch/i386-pkru.exp: set pkru value
info register pkru^M
pkru 0x12345678
305419896^M
(gdb) FAIL: gdb.arch/i386-pkru.exp: read value after setting value
...
This is a regression due to kernel commit
e84ba47e313d ("x86/fpu: Hook up PKRU
onto ptrace()"). This is fixed by recent kernel commit
4a804c4f8356
("x86/fpu: Allow PKRU to be (once again) written by ptrace.").
The regression occurs for kernel versions v5.14-rc1 (the first tag containing
the regression) up to but excluding v6.2-rc1 (the first tag containing the fix).
Fix this by adding an xfail for the appropriate kernel versions.
Tested on x86_64-linux.
PR testsuite/29790
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=29790
Tom Tromey [Tue, 3 Jan 2023 14:13:01 +0000 (07:13 -0700)]
Do not use PyObject_CallNoArgs
PyObject_CallNoArgs was introduced in Python 3.9, so avoid it in favor
of PyObject_CallObject.
Himal [Tue, 3 Jan 2023 12:07:16 +0000 (12:07 +0000)]
Fix a potential problem in the BFD library when accessing the Windows' nul device driver.
PR 29947
* bfdio.c (_bfd_real_fopen): Do not add a prefix to the Windows'
nul device filename.
Nick Clifton [Tue, 3 Jan 2023 12:03:02 +0000 (12:03 +0000)]
Fix a translation problem in the x86 assembler.
PR 29952
* config/tc-i386.c (md_assemble): Avoid constructing translatable
strings.
Nick Clifton [Tue, 3 Jan 2023 11:32:42 +0000 (11:32 +0000)]
Updated translations for various languages and sub-directories
Luis Machado [Tue, 3 Jan 2023 11:15:26 +0000 (11:15 +0000)]
Add new NT_ARM_ZA and NT_ARM_SSVE register set constants.
Andrew Burgess [Tue, 3 Jan 2023 09:18:48 +0000 (10:18 +0100)]
[gdb] Fix segfault during inferior call to ifunc
With a simple test-case:
...
$ cat test.c
char *p = "a";
int main (void) {
return strlen (p);
}
$ gcc -g test.c
...
we run into this segfault:
...
$ gdb -q -batch a.out -ex start -ex "p strlen (p)"
Temporary breakpoint 1 at 0x1151: file test.c, line 4.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Temporary breakpoint 1, main () at test.c:4
4 return strlen (p);
Fatal signal: Segmentation fault
...
The strlen is an ifunc, and consequently during the call to
call_function_by_hand_dummy for "p strlen (p)" another call
to call_function_by_hand_dummy is used to resolve the ifunc.
This invalidates the get_current_frame () result in the outer call.
Fix this by using prepare_reinflate and reinflate.
Note that this series (
https://inbox.sourceware.org/gdb-patches/
20221214033441.499512-1-simon.marchi@polymtl.ca/ )
should address this problem, but this patch is a simpler fix which is easy to
backport.
Tested on x86_64-linux.
Co-Authored-By: Tom de Vries <tdevries@suse.de>
PR gdb/29941
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=29941
Mike Frysinger [Tue, 3 Jan 2023 03:48:13 +0000 (22:48 -0500)]
sim: sh: move some generated source files to built sources
This should have been part of the previous commit
80636a54bcfa2bca3dc8f
("sim: build: move generated headers to built sources"), but they were
missed because they're .c files effectively treated as .h files.
Mike Frysinger [Tue, 3 Jan 2023 03:40:49 +0000 (22:40 -0500)]
sim: build: add var for tracking sim enable directly
Rather than rely on SIM_SUBDIRS being set, add a dedicated variable
to track whether to enable the sim. While the current code works
fine, it won't work as we remove the recursive make logic (i.e. the
SIM_SUBDIRS variable).
Mike Frysinger [Mon, 2 Jan 2023 19:17:56 +0000 (14:17 -0500)]
sim: common: drop libcommon.a linkage
All of these objects should be in libsim.a already, so don't link to
it too. In practice it never gets used, but no point in listing it.
Mike Frysinger [Tue, 3 Jan 2023 02:16:19 +0000 (21:16 -0500)]
sim: build: move generated headers to built sources
Automake's automatic header deptracking has a bootstrap problem where
it can't detect generated headers when compiling. We've been handling
that by adding a custom SIM_ALL_RECURSIVE_DEPS variable, but that only
works when building objects recursively in subdirs. As we move those
out to the top-level, we don't have any recursive steps anymore. The
Automake approach is to declare those headers in BUILT_SOURCES.
This isn't completely foolproof as the Automake manual documents: it
only activates for `make all`, not `make foo.o`, but that shouldn't be
a huge limitation as it only affects the initial compile. After that,
rebuilds should work fine.
Mike Frysinger [Mon, 2 Jan 2023 02:35:08 +0000 (21:35 -0500)]
sim: cgen: drop common subdir build rules
Now that everything has been hoisted to the top-level, we can delete
this unused logic.
Mike Frysinger [Mon, 2 Jan 2023 02:32:29 +0000 (21:32 -0500)]
sim: or1k: hoist cgen rules to top-level
Mike Frysinger [Mon, 2 Jan 2023 02:31:01 +0000 (21:31 -0500)]
sim: m32r: hoist cgen rules to top-level
Mike Frysinger [Mon, 2 Jan 2023 02:29:19 +0000 (21:29 -0500)]
sim: lm32: hoist cgen rules to top-level
Mike Frysinger [Mon, 2 Jan 2023 02:20:36 +0000 (21:20 -0500)]
sim: iq2000: hoist cgen rules to top-level
Mike Frysinger [Mon, 2 Jan 2023 02:18:50 +0000 (21:18 -0500)]
sim: frv: hoist cgen rules to top-level
Mike Frysinger [Mon, 2 Jan 2023 02:15:02 +0000 (21:15 -0500)]
sim: cris: hoist cgen rules to top-level
Mike Frysinger [Mon, 2 Jan 2023 02:00:12 +0000 (21:00 -0500)]
sim: bpf: hoist cgen rules to top-level
Mike Frysinger [Mon, 2 Jan 2023 01:11:01 +0000 (20:11 -0500)]
sim: cgen: hoist rules to the top-level build
The rules seem to generate the same output as existing subdir cgen
rules with cgen ports, so hopefully this should be correct. These
are the last set of codegen rules that we run in subdirs, so this
will help unblock killing off subdir builds entirely.
Mike Frysinger [Tue, 3 Jan 2023 00:30:22 +0000 (19:30 -0500)]
sim: build: use Automake include vars
Rather than define our own hack for emitting an include statement,
use the existing Automake include variables. These have the nice
side-effect of being more portable.
GDB Administrator [Tue, 3 Jan 2023 00:00:11 +0000 (00:00 +0000)]
Automatic date update in version.in
Tom Tromey [Mon, 2 Jan 2023 17:37:15 +0000 (10:37 -0700)]
Simplify debug_exp
debug_exp should call expression::dump rather than using the 'op'
member.
Tom Tromey [Thu, 23 Jun 2022 17:11:36 +0000 (11:11 -0600)]
Initial implementation of Debugger Adapter Protocol
The Debugger Adapter Protocol is a JSON-RPC protocol that IDEs can use
to communicate with debuggers. You can find more information here:
https://microsoft.github.io/debug-adapter-protocol/
Frequently this is implemented as a shim, but it seemed to me that GDB
could implement it directly, via the Python API. This patch is the
initial implementation.
DAP is implemented as a new "interp". This is slightly weird, because
it doesn't act like an ordinary interpreter -- for example it doesn't
implement a command syntax, and doesn't use GDB's ordinary event loop.
However, this seemed like the best approach overall.
To run GDB in this mode, use:
gdb -i=dap
The DAP code will accept JSON-RPC messages on stdin and print
responses to stdout. GDB redirects the inferior's stdout to a new
pipe so that output can be encapsulated by the protocol.
The Python code uses multiple threads to do its work. Separate
threads are used for reading JSON from the client and for writing JSON
to the client. All GDB work is done in the main thread. (The first
implementation used asyncio, but this had some limitations, and so I
rewrote it to use threads instead.)
This is not a complete implementation of the protocol, but it does
implement enough to demonstrate that the overall approach works.
There is a rudimentary test suite. It uses a JSON parser written in
pure Tcl. This parser is under the same license as Tcl itself, so I
felt it was acceptable to simply import it into the tree.
There is also a bit of documentation -- just documenting the new
interpreter name.
Jonas Hoerberg [Thu, 22 Dec 2022 15:22:17 +0000 (15:22 +0000)]
Fix target remote pipe command for MinGW
The
cced7cacecad104fff0 ("gdb: preserve `|` in connection details string")
commit added '|' detection and removal to ser-pipe.c, but missed to add it
to ser-mingw.c.
This results in the error message below for MinGW hosts:
error starting child process '| <executable> <args>': CreateProcess: No such file or directory
This commit add the missing '|' detection and removal to ser-mingw.c.
Tom Tromey [Wed, 21 Dec 2022 20:57:45 +0000 (13:57 -0700)]
Remove target: prefix from gdb_sysroot in find_separate_debug_file
I noticed that, when using gdbserver, gdb might print:
Reading /usr/lib/debug/lib64//libcap.so.2.48-2.48-4.fc36.x86_64.debug from remote target...
Reading target:/usr/lib/debug/lib64//libcap.so.2.48-2.48-4.fc36.x86_64.debug from remote target...
The second line has the "target:" prefix, but from the code it's clear
that this string is being passed verbatim to gdbserver -- which seems
wrong.
I filed PR remote/29929 for this.
The problem here is that find_separate_debug_file uses gdb_sysroot
without checking to see if it starts with the "target:" prefix. This
patch changes this code to be a little more careful.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=29929
Tom de Vries [Mon, 2 Jan 2023 10:59:17 +0000 (11:59 +0100)]
[gdb/testsuite] Fix gdb.python/py-breakpoint.exp with libstdc++ debug info
On x86_64-linux, I run into:
...
(gdb) python hbp1 = gdb.Breakpoint("add", type=gdb.BP_HARDWARE_BREAKPOINT)^M
Hardware assisted breakpoint 2 at 0x40072e: add. (7 locations)^M
(gdb) FAIL: gdb.python/py-breakpoint.exp: test_hardware_breakpoints: \
Set hardware breakpoint
...
due to libstdc++ debug info:
...
$ gdb -q -batch outputs/gdb.python/py-breakpoint/py-breakpoint \
-ex start \
-ex "b add" \
-ex "info break"
Temporary breakpoint 1 at 0x40076a: file py-breakpoint.c, line 50.
Temporary breakpoint 1, main (argc=1, argv=$hex) at py-breakpoint.c:50
50 int foo = 5;
Breakpoint 2 at 0x40072e: add. (7 locations)
Num Type Disp Enb Address What
2 breakpoint keep y <MULTIPLE>
2.1 y 0x000000000040072e in add(int) at \
py-breakpoint.c:39
2.2 y 0x00007ffff7b131de in \
(anonymous namespace)::fast_float::bigint::add at \
../../../../../libstdc++-v3/src/c++17/fast_float/fast_float.h:1815
...
2.7 y 0x00007ffff7b137e4 in \
(anonymous namespace)::fast_float::bigint::add at \
../../../../../libstdc++-v3/src/c++17/fast_float/fast_float.h:1815
...
Fix this by using qualified=True.
Tested on x86_64-linux.
PR testsuite/29910
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=29910
Mike Frysinger [Sun, 1 Jan 2023 15:07:28 +0000 (10:07 -0500)]
sim: replace -I$srcroot/bfd include with -I$srcroot
Clean up includes a bit by making ports include bfd/ headers
explicitly. This matches other projects, and makes it more clear
where these headers are coming from.
Mike Frysinger [Sun, 1 Jan 2023 14:55:07 +0000 (09:55 -0500)]
sim: replace -I$srcroot/opcodes include with -I$srcroot
Clean up includes a bit by making ports include opcodes/ headers
explicitly. This matches other projects, and makes it more clear
where these headers are coming from.
Alan Modra [Fri, 23 Dec 2022 07:13:21 +0000 (17:43 +1030)]
obsolete target tidy
Delete a few files only used for obsolete targets, and tidy config,
xfails and other pieces of support specific to those targets. And
since I was editing target triplets in test files, fix the nm
alpha-linuxecoff fails.
GDB Administrator [Mon, 2 Jan 2023 00:00:08 +0000 (00:00 +0000)]
Automatic date update in version.in
Mike Frysinger [Sun, 1 Jan 2023 22:46:15 +0000 (17:46 -0500)]
sim: build: drop unused SIM_EXTRA_LIBS
Now that all run binaries are linked in the topdir, this subdir libs
variable isn't used anywhere, so punt it.
Mike Frysinger [Sun, 1 Jan 2023 22:43:25 +0000 (17:43 -0500)]
sim: erc32: drop -I$(srcroot)
Since the port doesn't actually use this include, drop it.
No other port is doing this either.
Mike Frysinger [Sun, 1 Jan 2023 22:35:16 +0000 (17:35 -0500)]
sim: drop mention of & support for subdir configure
Now that no ports use these common configure APIs, delete the logic
and remove it from the documentation.
Mike Frysinger [Sun, 1 Jan 2023 20:09:19 +0000 (15:09 -0500)]
sim: refresh copyright dates a bit
Update a few files that were missed, and revert the generated Automake
output that uses dates from Automake itself.
Mike Frysinger [Sun, 1 Jan 2023 19:40:03 +0000 (14:40 -0500)]
sim: or1k: drop unused rules
These rules are the same as the common ones, so drop them to simplify.
Mike Frysinger [Sun, 1 Jan 2023 19:05:57 +0000 (14:05 -0500)]
sim: iq2000: drop unused cpu define logic
These defines seem to have been added in anticipation of adding another
cpu port (IQ10BF?), but that was over 20 years ago, and that port has
yet to materialize. So drop these compile flags since they don't do
anything to the generated code. If another port ever shows up, it's
easy enough to readd things as needed.
Joel Brobecker [Sun, 1 Jan 2023 12:52:30 +0000 (16:52 +0400)]
manual copyright year range of various GDB files to add 2023
This commit updates the following file...
gdb/doc/gdb.texinfo
gdb/doc/refcard.tex
gdb/syscalls/update-netbsd.sh
... by hand as instructed by the gdb/copyright.py script.
The update by hand is needed because the copyright headers
to update are actually nested inside those files, rather
than located at the start of the file.
Joel Brobecker [Sun, 1 Jan 2023 12:49:04 +0000 (16:49 +0400)]
Update copyright year range in header of all files managed by GDB
This commit is the result of running the gdb/copyright.py script,
which automated the update of the copyright year range for all
source files managed by the GDB project to be updated to include
year 2023.
Joel Brobecker [Sun, 1 Jan 2023 12:47:26 +0000 (16:47 +0400)]
gdb/copyright.py: Adjust following rename of sim/ppc/ppc-instructions...
... to sim/ppc/powerpc.igen
This file is in the NOT_FSF_LIST because this file has a copyright
which is not assigned to the FSF. Since the file got renamed,
the corresponding entry in NOT_FSF_LIST needs to be renamed as well.
Joel Brobecker [Sun, 1 Jan 2023 12:43:39 +0000 (16:43 +0400)]
Update copyright year in help message of gdb, gdbserver, gdbreplay
This commit updates the copyright year displayed by gdb, gdbserver
and gdbreplay's help message from 2022 to 2023, as per our Start
of New Year procedure. The corresponding source files' copyright
header are also updated accordingly.
Alan Modra [Sun, 1 Jan 2023 12:31:20 +0000 (23:01 +1030)]
Update year range in gprofng copyright notices
This adds 'Innovative Computing Labs' as an external author to
update-copyright.py, to cover the copyright notice in
gprofng/common/opteron_pcbe.c, and uses that plus another external
author 'Oracle and' to update gprofng copyright dates. I'm not going
to commit 'Oracle and' as an accepted author, but that covers the
string "Copyright (c) 2006, 2012, Oracle and/or its affiliates. All
rights reserved." found in gprofng/testsuite/gprofng.display/jsynprog
files.
Alan Modra [Sun, 1 Jan 2023 06:08:42 +0000 (16:38 +1030)]
Update year range in copyright notice of binutils files
The newer update-copyright.py fixes file encoding too, removing cr/lf
on binutils/bfdtest2.c and ld/testsuite/ld-cygwin/exe-export.exp, and
embedded cr in binutils/testsuite/binutils-all/ar.exp string match.
Alan Modra [Sun, 1 Jan 2023 06:03:14 +0000 (16:33 +1030)]
Update etc/update-copyright.py
This picks up some improvements from gcc/contrib. exceptions must
derive from BaseException, port to python3, retain original file mode,
fix name of script in examples.
Adds libsframe to list of default dirs. I would have added gprofng
too but there are some files claiming copyright by authors other than
the Free Software Foundation.
GDB Administrator [Sun, 1 Jan 2023 00:00:10 +0000 (00:00 +0000)]
Automatic date update in version.in
Nick Clifton [Sat, 31 Dec 2022 13:01:40 +0000 (13:01 +0000)]
Update version numbers in howto-make-a-release document
Nick Clifton [Sat, 31 Dec 2022 12:23:00 +0000 (12:23 +0000)]
Update version number and regenerate files
Nick Clifton [Sat, 31 Dec 2022 12:05:28 +0000 (12:05 +0000)]
Add markers for 2.40 branch
Nick Clifton [Sat, 31 Dec 2022 12:03:16 +0000 (12:03 +0000)]
sync libiberty sources with gcc mainline
Tom de Vries [Sat, 31 Dec 2022 09:23:06 +0000 (10:23 +0100)]
[gdb/cli] Add maintenance ignore-probes
There's a command "disable probes", but SystemTap probes, for instance
libc:longjmp cannot be disabled:
...
$ gdb -q -batch a.out -ex start -ex "disable probes libc ^longjmp$"
...
Probe libc:longjmp cannot be disabled.
Probe libc:longjmp cannot be disabled.
Probe libc:longjmp cannot be disabled.
...
Add a command "maintenance ignore-probes" that ignores probes during
get_probes, such that we can easily pretend to use a libc without the
libc:longjmp probe:
...
(gdb) maint ignore-probes -verbose libc ^longjmp$
ignore-probes filter has been set to:
PROVIDER: 'libc'
PROBE_NAME: '^longjmp$'
OBJNAME: ''
(gdb) start ^M
...
Ignoring SystemTap probe libc longjmp in /lib64/libc.so.6.^M
Ignoring SystemTap probe libc longjmp in /lib64/libc.so.6.^M
Ignoring SystemTap probe libc longjmp in /lib64/libc.so.6.^M
...
The "Ignoring ..." messages can be suppressed by not using -verbose.
Note that as with "disable probes", running simply "maint ignore-probes"
ignores all probes.
The ignore-probes filter can be reset by using:
...
(gdb) maint ignore-probes -reset
ignore-probes filter has been reset
...
For now, the command is only supported for SystemTap probes.
PR cli/27159
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=27159