The 'info pretty-printers' example is pretty long and consists of many
commands and their output.
Currently, when the pdf manual is generated this example spans a
page-break, with the page-break falling part way through some example
output from GDB.
This commit breaks up the example using @group .... @end group, within
each group is a single GDB command and all its output.
Now, when the pdf manual is created, the page-break is placed after
the output of one GDB command, and before the subsequent command, this
looks much nicer.
The example for 'info pretty-printer' in the manual passes an
object-regexp in some cases, but presents output as though no
object-regexp was passed.
This commit fixes the two mistakes, in one case, fixing the output to
filter based on object-regexp, and in the other, to remove the
object-regexp from the command and leave all the output.
When building GDB with -std=c++17 and -D_GLIBCXX_DEBUG=1, I get:
$ ./gdb -nx --data-directory=data-directory -q -ex "maint selftest path_join"
/usr/include/c++/11.2.0/string_view:233: constexpr const value_type& std::basic_string_view<_CharT, _Traits>::operator[](std::basic_string_view<_CharT, _Traits>::size_type) const [with _CharT = char; _Traits = std::char_traits<char>; std::basic_string_view<_CharT, _Traits>::const_reference = const char&; std::basic_string_view<_CharT, _Traits>::size_type = long unsigned int]: Assertion '__pos < this->_M_len' failed.
The problem is that we're passing an empty string_view to
IS_ABSOLUTE_PATH. IS_ABSOLUTE_PATH accesses [0] on that string_view,
which is out-of-bounds.
The reason this is not seen with -std less than c++17 is that our local
copy of string_view (used with C++ < 17) does not have the assert in
operator[], as that wouldn't work in a constexpr method:
5890af36e5/gdbsupport/gdb_string_view.h (L180)
IS_ABSOLUTE_PATH is normally used with null-terminated string. It's
fine to pass an empty null-terminated string to IS_ABSOLUTE_PATH,
because index 0 in such a string is valid. But not with an empty
string_view.
Fix that by avoiding the "call" to IS_ABSOLUTE_PATH if the string_view
is empty.
Change-Id: Idf4df961b63f513b3389235e93814c02b89ea32e
Like the placeholder types added in 04dfe7aa52 ("Arm64: follow-on to
PR gas/27217 fix"), these are also placeholders which are subsequently
resolved (albeit later, hence this being a separate issue). As for the
resolved types 1 is returned, these pseudo-relocs should also have 1
returned to force retaining of the [eventual] relocations. This is also
spelled out individually for each of them in md_apply_fix().
Otherwise the string table may grow and hence e.g. change a final binary
(observed with PE/COFF ones) even if really there's no change. Doing so
in fact reduces the overall amount of code, and in particular the number
of places which need to remain in sync.
Afaics there's no real equivalent to the "traditional_format" field used
when linking, so hashing is always enabled when copying / stripping.
Neither of the tools is really a linker, so whatever was originally
recorded should be retained rather than being overwritten by these
tools' versions.
Fill the timestamp field suitably for _bfd_XXi_only_swap_filehdr_out().
Instead of re-arranging the present if(), fold this logic with that of
copying the optional header.
So far this option had no effect when used together with e.g.
--strip-debug. Set BSF_FILE on these symbols to change that.
While altering this also join two adjacent blocks of case labeled
statements with identical code.
When a sufficiently small alignment was specified via --file-alignment,
individual section alignment shouldn't affect placement within the file.
This involves first of all clearing D_PAGED for images when section and
file alignment together don't permit paging of the image. The involved
comparison against COFF_PAGE_SIZE in turn helped point out (through a
compiler warning) that 'page_size' should be of unsigned type (as in
particular FileAlignment is). This yet in turn pointed out a dubious
error condition (which is being deleted).
For the D_PAGED case I think the enforced file alignment may still be
too high, but I'm wary of changing that logic without knowing of
possible corner cases.
Furthermore file positions in PE should be independent of the alignment
recorded in section headers anyway. Otherwise there are e.g. anomalies
following commit 6f8f6017a0 ("PR27567, Linking PE files adds alignment
section flags to executables") in that linking would use information a
subsequent processing step (e.g. stripping) wouldn't have available
anymore, and hence a binary could change in that 2nd step for no actual
reason. (Similarly stripping a binary linked with a linker pre-dating
that commit would change the binary again when stripping it a 2nd time.)
This commit fixes canonical extension order to follow the RISC-V ISA
Manual draft-20210402-1271737 or later.
bfd/ChangeLog:
* elfxx-riscv.c (riscv_recognized_prefixed_ext): Fix "K" extension
prefix to be placed before "J".
Replace the sve bool member of aarch64_features with a vq member that
holds the vector quotient. It is zero if SVE is not present.
Add std::hash<> specialization and operator== so that aarch64_features
can be used as a key with std::unordered_map<>.
Change the various functions that create or lookup aarch64 target
descriptions to accept a const aarch64_features object rather than a
growing number of arguments.
Replace the multi-dimension tdesc_aarch64_list arrays used to cache
target descriptions with unordered_maps indexed by aarch64_feature.
PR gas/27217
Prior to trying to address PR gas/28888 I noticed anomalies in how
certain insns would / wouldn't be affected in similar ways.
Commit eac4eb8ecb ("Fix a problem assembling AArch64 sources when a
relocation is generated against a symbol that has a defined value") had
two copy-and-paste mistakes, passing the wrong type to
aarch64_force_reloc().
It further failed to add placeholder relocation types to that function's
block of case labels leading to a return of 1. While not of interest for
aarch64_force_relocation() (these placeholders are resolved right in
parse_operands()), calls to aarch64_force_reloc() happen before that
resolution would take place.
* config/tc-arm.c (parse_reg_list): Add handling of mixed register
types.
(reg_names): Enumerate pseudoregister according to mapped physical
register number.
(s_arm_unwind_save_pseudo): Modify function signature.
(s_arm_unwind_save_core): Likewise.
(s_arm_unwind_save_mixed): New function.
(s_arm_unwind_save): Generate register list mask to pass to nested
functions.
* testsuite/gas/arm/unwind-pacbti-m.s: Expand test for mixed
register type lists.
* testsuite/gas/arm/unwind-pacbti-m.d: Likewise.
* testsuite/gas/arm/unwind-pacbti-m-readelf.d: Likewise.
Fix changes that didn't make it into commit:
dd9cd55e99.
Fix missing -wrap on gdb_test_multiple in gdb.base/kill-after-signal.exp
that is causing regression test on x86_64-linux with taskset -c 0.
It is only ever initialized from a boolean, so it as well as related
variables' types can simply be bool and there's no masking to 32 bits
needed in set_op().
PR 29135
* nm.c (non_weak): New variable.
(filter_symbols): When non-weak is true, ignore weak symbols.
(long_options): Add --no-weak.
(usage): Mention --no-weak.
(main): Handle -W/--no-weak.
* doc/binutils.texi: Document new feature.
* NEWS: Mention the new feature.
* testsuite/binutils-all/nm.exp: Add test of new feature.
* testsuite/binutils-all/no-weak.s: New test source file.
This teaches gdb_test to forward the -prompt and -lbl options to
gdb_test_multiple.
The option parsing is done with parse_args.
As a cleanup, instead of using llength and lindex to get at the
positional arguments, use lassign, and check whether the corresponding
variable is empty.
Convert gdb.base/ui-redirect.exp and gdb.xml/tdesc-reload.exp to use
gdb_test -prompt/-lbl instead of gdb_test_multiple as examples.
Change-Id: I243e1296d32c05a421ccef30b63d43a89eaeb4a0
The AARCH64_DWARF_PAUTH_DMASK and AARCH64_DWARF_PAUTH_CMASK DWARF registers
never made their way into the aadwarf64. The following patch removes these
constants and their use.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=26295
Move testing of language unknown out of the $supported_archs loop in
gdb.base/parse_number.exp. This reduces total amount of tests from 18466 to
17744.
Tested on x86_64-linux.
Add a new script gdb/syscalls/update-linux-from-src.sh, that can be used to
generate *-linux.xml.in files from linux kernel sources, like so:
...
$ ./update-linux-from-src.sh ~/upstream/linux-stable.git
Skipping aarch64-linux.xml.in, no syscall.tbl
Generating amd64-linux.xml.in
Skipping arm-linux.xml.in, use arm-linux.py instead
Skipping bfin-linux.xml.in, no longer supported
Generating i386-linux.xml.in
Generating mips-n32-linux.xml.in
Generating mips-n64-linux.xml.in
Generating mips-o32-linux.xml.in
Generating ppc64-linux.xml.in
Generating ppc-linux.xml.in
Generating s390-linux.xml.in
Generating s390x-linux.xml.in
Generating sparc64-linux.xml.in
Generating sparc-linux.xml.in
...
Update *-linux.xml.in and *-linux.xml using linux kernel tag v5.18-rc6.
In Armv9-A SVE is mandatory, and for SVE FP16 is mandatory. This fixes a disconnect
between GCC and binutils where GCC has FP16 on by default and gas doesn't.
include/ChangeLog:
2022-05-16 Tamar Christina <tamar.christina@arm.com>
* opcode/aarch64.h (AARCH64_ARCH_V9_FEATURES): Add AARCH64_FEATURE_F16.
Compilers would put decimal numbers there, so I think we should treat
finding octal numbers the same as finding bignums - ignore them as
actually being comments of some very specific form.
Any construct which to the scrubber looks like a C preprocessor
line/file "directive" is converted to .linefile, but the amount of
checking the scrubber does is minimal (albeit it does let through only
decimal digits for the line part of the contruct). Since the scrubber
conversion is further tied to # being a line comment character, anything
which upon closer inspection turns out not to be a line/file "directive"
is supposed to be treated as a comment, i.e. ignored. Therefore we
cannot use get_absolute_expression(), as this may raise errors. Open-
code the function instead, treating everything not resulting in
O_constant as a comment as well.
Furthermore also bounds-check the parsed value. This bounds check tries
to avoid implementation defined behavior (which may be the raising of an
implementation defined signal), but for now makes the assumption that
int has less than 64 bits. The way bfd_signed_vma (which is what offsetT
aliases) is defined in bfd.h for the BFD64 case I cannot really see a
clean way of avoiding this assumption. Omitting the #ifdef, otoh, would
risk "condition is always false" warnings by compilers.
Convert get_linefile_number() to return bool at this occasion as well.
do_repeat_with_expander() already deals with the "no expander" case
quite fine, so there's really little point having two functions. What it
lacks compared with do_repeat() is a call to sb_build(), which can
simply be moved (and the then redundant sb_new() be avoided). Along with
this moving also flip if the main if()'s condition such that the "no
expander" case is handled first.
When assembling code previously pre-processed by a C compiler, long
enough comments may have been collapsed into "# <line> <file>"
constructs. If we skip these, line numbers (and possibly even file
names) will be off / wrong in both diagnostics and debug info.
First of all convert to switch(), in preparation of adding another
directive here which may not be ignored. While doing so drop dead code:
A string the first two characters of which do not match "if" also wont
match "ifdef" or "ifndef".
pr17704a_test.s is a x86_64 assembly file, but it invokes IA32 exit
syscall with "int 0x80". This causes a segfault on kernels with
CONFIG_IA32_EMULATION disabled.
gold/
* testsuite/pr17704a_test.s (_start): Invoke x86_64 exit syscall
instead of its IA32 counterpart.
After the patch to make gdb_test's question non-optional when
specified, gdb.python/py-connection.exp started failing like so:
$ make check TESTS="gdb.python/py-connection.exp" RUNTESTFLAGS="--target_board=native-gdbserver"
(gdb) PASS: gdb.python/py-connection.exp: info connections while the connection is still around
disconnect^M
Ending remote debugging.^M
(gdb) FAIL: gdb.python/py-connection.exp: kill the inferior
The problem is that "disconnect" when debugging with the native target
asks the user whether to kill the program, while with remote targets,
it doesn't.
Fix it by explicitly killing before disconnecting.
Tested with --target_board unix, native-gdbserver, and native-extended-gdbserver.
Change-Id: Icd85015c76deb84b71894715d43853c1087eba0b
gdb_test supports handling scenarios where GDB asks a question before
finishing handling some command. The full prototype of gdb_test is:
# gdb_test COMMAND PATTERN MESSAGE QUESTION RESPONSE
However, QUESTION is a question that GDB _may_ ask, not one that GDB
_must_ ask:
# QUESTION is a question GDB may ask in response to COMMAND, like
# "are you sure?"
# RESPONSE is the response to send if QUESTION appears.
If GDB doesn't raise the question, the test still passes.
I think that this is a misfeature. If GDB regresses and stops asking
a question, the testsuite won't notice. So I think that if a QUESTION
is specified, gdb_test should ensure it comes out of GDB.
Running the testsuite exposed a number of tests that pass
QUESTION/RESPONSE to GDB, but no question comes out. The previous
commits fixed them all, so this commit changes gdb_test's behavior.
A related issue is that gdb_test doesn't enforce that if you specify
QUESTION, that you also specify RESPONSE. I.e., you should pass 1, 2,
3, or 5 arguments to gdb_test, but never 4, or more than 5. Making
gdb_test detect bogus arguments actually regressed some testcases,
also all fixed in previous commits.
Change-Id: I47c39c9034e6a6841129312037a5ca4c5811f0db
gdb.base/skip.exp abuses gdb_test's support for answering a GDB
question to do this:
# With gcc 9.2.0 we jump once back to main before entering foo here.
# If that happens try to step a second time.
gdb_test "step" "foo \\(\\) at.*" "step 3" \
"main \\(\\) at .*\r\n$gdb_prompt " "step"
After a patch later in this series, gdb_test will FAIL if GDB does NOT
issue the question, so this test would start failing on older GCCs.
Switch to using gdb_test_multiple instead. There are three spots in
the file that have the same pattern, and they're actually in a
sequence of commands that is repeated those 3 times. Factor all that
out to a procedure.
I don't have gcc 9.2 handy, but I do have gcc 6.5, and that one is
affected as well, so update the comment.
Change-Id: If0a7e3cdf5191b4eec95ce0c8845c3a4d801c39e
gdb.server/connect-with-no-symbol-file.exp's connect_no_symbol_file
does:
gdb_test "file" ".*" "discard symbol table" \
{Discard symbol table from `.*'\? \(y or n\) } "y"
A following patch will make gdb_test expect the question out of GDB if
one is passed down as argument to gdb_test. With that, this test
starts failing. This is because connect_no_symbol_file is called in a
loop, and the first time around, there's a loaded file, so "file" asks
the "Discard symbol table ... ?" question, while in the following
iterations there's no file, so there's no question.
Fix this by not loading a file into GDB in the first place.
Change-Id: I810c036b57842c4c5b47faf340466b0d446d1abc
A following patch will make gdb_test error out if bogus arguments are
passed, which exposed bugs in a few testcases:
- gdb.python/py-parameter.exp, passing a spurious "1" as extra
parameter, resulting in:
ERROR: Unexpected arguments: {set test-file-param bar.txt} {The name of the file has been changed to bar.txt} {set new file parameter} 1
- gdb.python/py-xmethods.exp, a missing test message, resulting in
the next gdb_test being interpreted as message, question and
response! With the enforcing patch, this was caught with:
ERROR: Unexpected arguments: {p g.mul<char>('a')} {From Python G<>::mul.*} gdb_test {p g_ptr->mul<char>('a')} {From Python G<>::mul.*} {after: g_ptr->mul<char>('a')}
- gdb.base/pointers.exp, missing a quote.
Change-Id: I66f2db4412025a64121db7347dfb0b48240d46d4
This test is abusing the QUESTION/RESPONSE feature to send an
alternative command to GDB if the first command fails. Like so:
gdb_test "print 'scope0.c'::filelocal" \
"\\\$$decimal = 1" "print 'scope0.c'::filelocal at main" \
"No symbol \"scope0.c\" in current context.*" \
"print '$srcdir/$subdir/scope0.c'::filelocal"
So if 'scope0.c' doesn't work, we try again with
'$srcdir/$subdir/scope0.c'. I strongly suspect this is really an
obsolete test. I think that if '$srcdir/$subdir/scope0.c' works, then
'scope0.c' should have worked too, thus I'd think that if we pass due
to the question path, then it's a bug. So just remove the question
part passed to gdb_test.
Change-Id: I2acc99285f1d519284051b49693b5441fbdfe3cd
