Two patches from Nelson Chu.
It is better to use the linker's callback functions to handle the link time
error when relocating. The unresolved relocation error can be regarded as
an unsupported relocation. To make user easier to understand different errors,
we need to extend the current error message format of the callback function
since the format is fixed.
bfd/
* elfnn-riscv.c (riscv_elf_relocate_section): Use asprintf to extend
the error message if needed, and then store the result into the
`msg_buf`. Finally, remember to free the unused `msg_buf`. All error
message for the dangerous relocation should be set before we call the
callback function. If we miss the error message since linker runs out
of memory, we should set the default error message for the error.
ld/
* testsuite/ld-riscv-elf/lib-nopic-01a.s: Create the shared library
lib-nopic-01a.so, it will be linked with lib-nopic-01b.s.
* testsuite/ld-riscv-elf/lib-nopic-01b.s: Add new test for the
unresolved relocation. Link the non-pic code into a shared library
may cause the error.
* testsuite/ld-riscv-elf/lib-nopic-01b.d: Likewise.
* testsuite/ld-riscv-elf/ld-riscv-elf.exp: Run the new test only when
the shared library is supported.
R_RISCV_CALL, R_RISCV_JAL and R_RISCV_RVC_JUMP are pc-relative relocation.
For now, we do not allow the object with these relocation links into a shared
library since the referenced symbols may be loaded to the places that too far
from the pc. We can improve the error message for these unsupported relocation
to notice user that they should recompile their code with `fPIC`.
bfd/
* elfnn-riscv.c (riscv_elf_relocate_section): Report the error message
that user should recompile their code with `fPIC` when linking non-pic
code into shared library.
ld/
* testsuite/ld-riscv-elf/lib-nopic-01b.d: Update the error message.
Change-Id: Ib3347a0a6fa1c2b20a9647c314d5bec2c322ff04
I happened to notice that "make" would always print:
CONFIG_HEADERS=config.h:config.in \
CONFIG_COMMANDS="default depdir" \
CONFIG_FILES= \
CONFIG_LINKS= \
/bin/sh config.status
config.status: creating config.h
config.status: config.h is unchanged
on every rebuild. This seems to have changed due to an autoconf
upgrade at some point in the past. In the autoconf gdb uses now, it
works to use AC_CONFIG_HEADERS and then create the stamp file via the
"commands" argument.
This patch also fixes up Makefile.in to use the new-style
config.status invocation. It's no longer necessary to pass the output
file names via environment variables.
gdb/ChangeLog
2019-10-17 Tom Tromey <tromey@adacore.com>
* configure: Rebuild.
* configure.ac: Use AC_CONFIG_HEADERS. Create stamp-h there, not
in AC_CONFIG_FILES invocation.
* Makefile.in (Makefile, data-directory/Makefile, stamp-h): Use
new-style config.status invocation.
gdb/gdbserver/ChangeLog
2019-10-17 Tom Tromey <tromey@adacore.com>
* configure: Rebuild.
* configure.ac: Use AC_CONFIG_HEADERS. Create stamp-h there, not
in AC_CONFIG_FILES invocation.
* Makefile.in (stamp-h, Makefile): Use new-style config.status
invocation.
Change-Id: Ia0530d1c5b9756812d29ddb8dc1062326155e61e
We're forgetting to include the libctf directory when creating the
snapshot. This commit changes src-release.sh and adds it to
GDB_SUPPORT_DIRS.
2019-10-17 Sergio Durigan Junior <sergiodj@redhat.com>
* src-release.sh (GDB_SUPPORT_DIRS): Add libctf.
Change-Id: Iada82e5c9e4f8d5a0a5e467d2a628f1fba66002e
On openSUSE Leap 15.1, I get:
...
FAIL: gdb.fortran/module.exp: info variables -n
...
because the info variables command prints info also for init.c:
...
File init.c:^M
24: const int _IO_stdin_used;^M
...
while the regexps in the test-case only expect info for module.f90.
Fix this by extending the regexps.
Tested on x86_64-linux.
gdb/testsuite/ChangeLog:
2019-10-17 Tom de Vries <tdevries@suse.de>
* gdb.fortran/module.exp: Allow info variables to print info for files
other than module.f90.
Change-Id: I401d8018b121fc7343f6bc8b671900349462457f
As of today we have just the following oddities left
./gnulib/update-gnulib.sh:ver=`autoconf --version 2>&1 | head -1 | sed 's/.*) //'`
./gnulib/update-gnulib.sh:ver=`automake --version 2>&1 | head -1 | sed 's/.*) //'`
./gnulib/update-gnulib.sh:ver=`aclocal --version 2>&1 | grep -v "called too early to check prototype" | head -1 | sed 's/.*) //'`
./src-release.sh: head -1 $tool/version.in
./contrib/dg-extract-results.sh:tail -2 $FIRST_SUM | $GREP '^#' > /dev/null || tail -2 $FIRST_SUM
gnulib and contrib (from gcc) are outside of binutils control, so with
this patch I'm going to declare this 15 year old bug fixed.
PR 29
* src-release.sh (getver): Replace "head -1" with "head -n 1".
I noticed that objfile::original_name could be a "const char *" rather
than a plain "char *". This patch implements this change. Tested by
rebuilding.
gdb/ChangeLog
2019-10-16 Tom Tromey <tom@tromey.com>
* objfiles.h (struct objfile) <original_name>: Now const.
Recent work from Tom Tromey to better handle variables with associated
copy relocations has fixed a Fortran issue where module variables
wouldn't show up in the output of 'info variables'.
This commit adds a test for this functionality to ensure it doesn't
get broken in the future.
gdb/testsuite/ChangeLog:
* gdb.fortran/module.exp: Extend with 'info variables' test.
Change-Id: I7306b1d0a9a72947fd48ad7a03f49df774d6573b
The board file cc-with-tweaks is used as the core for lots of other
board files, for example cc-with-gdb-index and cc-with-debug-names.
This commit extends cc-with-tweaks so that it will wrap the Fortran
compiler, allowing for more test coverage.
I tested all of the board files that make use of cc-with-tweaks
running the gdb.fortran/*.exp test set, and in some cases I did see
extra failures. The "standard" results are:
=== gdb Summary ===
# of expected passes 953
# of known failures 2
With board file 'cc-with-dwz-m':
=== gdb Summary ===
# of expected passes 903
# of unexpected failures 1
# of known failures 2
# of untested testcases 4
With board file 'dwarf4-gdb-index':
=== gdb Summary ===
# of expected passes 950
# of unexpected failures 3
# of known failures 2
With board file 'fission-dwp':
=== gdb Summary ===
# of expected passes 949
# of unexpected failures 4
# of known failures 2
Despite these extra failure I don't think this should prevent this
change going in as these failures presumably already exist in GDB.
gdb/testsuite/ChangeLog:
* boards/cc-with-tweaks.exp: Setup F90_FOR_TARGET and
F77_FOR_TARGET.
Change-Id: I06d412f94d0e119ad652dd6c20829f6705a54622
Saving the signal state is very slow (this patch is a 14% speedup). The
reason we need this code is because signal handler will leave the
signal blocked when we longjmp out of it. But in this case we can
just manually unblock the signal instead of taking the unconditional
perf hit.
gdb/ChangeLog:
2019-10-16 Christian Biesinger <cbiesinger@google.com>
* gdbsupport/gdb_setjmp.h (SIGSETJMP): Allow passing in the value to
pass on to sigsetjmp's second argument.
* cp-support.c (gdb_demangle): Unblock SIGSEGV if we caught a crash.
Change-Id: Ib3010966050c64b4cc8b47d8cb45871652b0b3ea
This is another fuzzer bug, gdb/23567. This time, the fuzzer has
specifically altered the size of .debug_str:
$ eu-readelf -S objdump
Section Headers:
[Nr] Name Type Addr Off Size ES Flags Lk Inf Al
[31] .debug_str PROGBITS 0000000000000000 0057116d ffffffffffffffff 1 MS 0 0 1
When this file is loaded into GDB, the DWARF reader crashes attempting
to access the string table (or it may just store a bunch of nonsense):
[gdb-8.3-6-fc30]
$ gdb -nx -q objdump
BFD: warning: /path/to/objdump has a corrupt section with a size (ffffffffffffffff) larger than the file size
Reading symbols from /path/to/objdump...
Segmentation fault (core dumped)
Nick has already committed a BFD patch to issue the warning seen above.
[gdb master 6acc1a0b]
$ gdb -BFD: warning: /path/to/objdump has a corrupt section with a size (ffffffffffffffff) larger than the file size
Reading symbols from /path/to/objdump...
(gdb) inf func
All defined functions:
File ./../include/dwarf2.def:
186: const
8 *>(.:
;'@�B);
747: const
8 *�(.:
;'@�B);
701: const
8 *�D �
(.:
;'@�B);
71: const
8 *(.:
;'@�B);
/* and more gibberish */
Consider read_indirect_string_at_offset_from:
static const char *
read_indirect_string_at_offset_from (struct objfile *objfile,
bfd *abfd, LONGEST str_offset,
struct dwarf2_section_info *sect,
const char *form_name,
const char *sect_name)
{
dwarf2_read_section (objfile, sect);
if (sect->buffer == NULL)
error (_("%s used without %s section [in module %s]"),
form_name, sect_name, bfd_get_filename (abfd));
if (str_offset >= sect->size)
error (_("%s pointing outside of %s section [in module %s]"),
form_name, sect_name, bfd_get_filename (abfd));
gdb_assert (HOST_CHAR_BIT == 8);
if (sect->buffer[str_offset] == '\0')
return NULL;
return (const char *) (sect->buffer + str_offset);
}
With sect_size being ginormous, the code attempts to access
sect->buffer[GINORMOUS], and depending on the layout of memory,
GDB either stores a bunch of gibberish strings or crashes.
This is an attempt to mitigate this by implementing a similar approach
used by BFD. In our case, we simply reject the section with the invalid
length:
$ ./gdb -nx -q objdump
BFD: warning: /path/to/objdump has a corrupt section with a size (ffffffffffffffff) larger than the file size
Reading symbols from /path/to/objdump...
warning: Discarding section .debug_str which has a section size (ffffffffffffffff) larger than the file size [in module /path/to/objdump]
DW_FORM_strp used without .debug_str section [in module /path/to/objdump]
(No debugging symbols found in /path/to/objdump)
(gdb)
Unfortunately, I have not found a way to regression test this, since it
requires poking ELF section headers.
gdb/ChangeLog:
2019-10-16 Keith Seitz <keiths@redhat.com>
PR gdb/23567
* dwarf2read.c (dwarf2_per_objfile::locate_sections): Discard
sections whose size is greater than the file size.
Change-Id: I896ac3b4eb2207c54e8e05c16beab3051d9b4b2f
This adds initial compile command support to the RISC-V port. This fixes
about 228 testsuite failures on a riscv64-linux machine. We need to get
the triplet right which is normally riscv64 or riscv32 instead of the
default riscv. Also, we need to get the compiler options right, since we
don't accept the default -m64 and -mcmodel=large options, so we need to
construct -march and -mabi options which are correct for the target. We
currently don't have info about all extensions used by the target, so this
may need to be adjusted later. For now, I'm assuming that we have all
extensions required by the linux platform spec.
gdb/
* riscv-tdep.c (riscv_gcc_target_options): New.
(riscv_gnu_triplet_regexp): New.
(riscv_gdbarch_init): Call set_gdbarch_gcc_triplet_options and
set_gdbarch_gnu_triplet_regexp.
Change-Id: I315ce8de7789ddf7bdd3b532f917519464941294
xml-builtin.c only has character arrays and no dependencies, so this
creates a simple header file for that purpose so that gdbserver
can include that instead of re-declaring xml_builtin.
Despite the name, feature_to_c.sh is already specific to xml_builtins
(it hardcodes the variable name), so making it always output the
include for xml-builtin.h seems fine.
gdb/ChangeLog:
2019-10-16 Christian Biesinger <cbiesinger@google.com>
* Makefile.in: Add xml-builtin.h.
* features/feature_to_c.sh: Add an include for xml-builtin.h
to ensure that the compiler checks that the types match.
* xml-builtin.h: New file.
* xml-support.c (fetch_xml_builtin): Add missing const.
* xml-support.h: Remove declaration of xml_builtins.
gdb/gdbserver/ChangeLog:
2019-10-16 Christian Biesinger <cbiesinger@google.com>
* server.c: Include xml-builtin.h.
(get_xml_features): Don't declare xml_builtins here.
Change-Id: I806ef0851c43ead90b545a11794e41f5e5178436
When building binutils with mingw-w64, I get the following errors:
make[4]: Entering directory '/home/simark/build/binutils-gdb-mingw/binutils'
/bin/sh ./libtool --tag=CC --mode=link ccache x86_64-w64-mingw32-gcc -W -Wall -Wstrict-prototypes -Wmissing-prototypes -Wshadow -Wstack-usage=262144 -Wno-format -Werror -I/home/simark/src/binutils-gdb/binutils/../zlib -g3 -O0 -D__USE_MINGW_ACCESS -Wl,--stack,12582912 -o objdump.exe objdump.o dwarf.o prdbg.o rddbg.o debug.o stabs.o rdcoff.o bucomm.o version.o filemode.o elfcomm.o ../opcodes/libopcodes.la ../libctf/libctf.la ../bfd/libbfd.la ../libiberty/libiberty.a -lintl
libtool: link: ccache x86_64-w64-mingw32-gcc -W -Wall -Wstrict-prototypes -Wmissing-prototypes -Wshadow -Wstack-usage=262144 -Wno-format -Werror -I/home/simark/src/binutils-gdb/binutils/../zlib -g3 -O0 -D__USE_MINGW_ACCESS -Wl,--stack -Wl,12582912 -o .libs/objdump.exe objdump.o dwarf.o prdbg.o rddbg.o debug.o stabs.o rdcoff.o bucomm.o version.o filemode.o elfcomm.o ../opcodes/.libs/libopcodes.a ../libctf/.libs/libctf.a -L/home/simark/build/binutils-gdb-mingw/zlib ../bfd/.libs/libbfd.a -lz ../libiberty/libiberty.a -lintl
/usr/lib/gcc/x86_64-w64-mingw32/9.2.0/../../../../x86_64-w64-mingw32/bin/ld: ../libctf/.libs/libctf.a(ctf-open.o): in function `flip_header':
/home/simark/src/binutils-gdb/libctf/ctf-open.c:964: undefined reference to `bswap_16'
/usr/lib/gcc/x86_64-w64-mingw32/9.2.0/../../../../x86_64-w64-mingw32/bin/ld: /home/simark/src/binutils-gdb/libctf/ctf-open.c:967: undefined reference to `bswap_32'
/usr/lib/gcc/x86_64-w64-mingw32/9.2.0/../../../../x86_64-w64-mingw32/bin/ld: /home/simark/src/binutils-gdb/libctf/ctf-open.c:968: undefined reference to `bswap_32'
/usr/lib/gcc/x86_64-w64-mingw32/9.2.0/../../../../x86_64-w64-mingw32/bin/ld: /home/simark/src/binutils-gdb/libctf/ctf-open.c:969: undefined reference to `bswap_32'
/usr/lib/gcc/x86_64-w64-mingw32/9.2.0/../../../../x86_64-w64-mingw32/bin/ld: /home/simark/src/binutils-gdb/libctf/ctf-open.c:970: undefined reference to `bswap_32'
/usr/lib/gcc/x86_64-w64-mingw32/9.2.0/../../../../x86_64-w64-mingw32/bin/ld: /home/simark/src/binutils-gdb/libctf/ctf-open.c:971: undefined reference to `bswap_32'
/usr/lib/gcc/x86_64-w64-mingw32/9.2.0/../../../../x86_64-w64-mingw32/bin/ld: ../libctf/.libs/libctf.a(ctf-open.o):/home/simark/src/binutils-gdb/libctf/ctf-open.c:972: more undefined references to `bswap_32' follow
/usr/lib/gcc/x86_64-w64-mingw32/9.2.0/../../../../x86_64-w64-mingw32/bin/ld: ../libctf/.libs/libctf.a(ctf-open.o): in function `flip_types':
/home/simark/src/binutils-gdb/libctf/ctf-open.c:1112: undefined reference to `bswap_16'
/usr/lib/gcc/x86_64-w64-mingw32/9.2.0/../../../../x86_64-w64-mingw32/bin/ld: /home/simark/src/binutils-gdb/libctf/ctf-open.c:1113: undefined reference to `bswap_16'
/usr/lib/gcc/x86_64-w64-mingw32/9.2.0/../../../../x86_64-w64-mingw32/bin/ld: /home/simark/src/binutils-gdb/libctf/ctf-open.c:1132: undefined reference to `bswap_32'
/usr/lib/gcc/x86_64-w64-mingw32/9.2.0/../../../../x86_64-w64-mingw32/bin/ld: /home/simark/src/binutils-gdb/libctf/ctf-open.c:1133: undefined reference to `bswap_32'
/usr/lib/gcc/x86_64-w64-mingw32/9.2.0/../../../../x86_64-w64-mingw32/bin/ld: /home/simark/src/binutils-gdb/libctf/ctf-open.c:1134: undefined reference to `bswap_32'
/usr/lib/gcc/x86_64-w64-mingw32/9.2.0/../../../../x86_64-w64-mingw32/bin/ld: /home/simark/src/binutils-gdb/libctf/ctf-open.c:1135: undefined reference to `bswap_32'
/usr/lib/gcc/x86_64-w64-mingw32/9.2.0/../../../../x86_64-w64-mingw32/bin/ld: /home/simark/src/binutils-gdb/libctf/ctf-open.c:1144: undefined reference to `bswap_32'
/usr/lib/gcc/x86_64-w64-mingw32/9.2.0/../../../../x86_64-w64-mingw32/bin/ld: ../libctf/.libs/libctf.a(ctf-open.o):/home/simark/src/binutils-gdb/libctf/ctf-open.c:1145: more undefined references to `bswap_32' follow
/usr/lib/gcc/x86_64-w64-mingw32/9.2.0/../../../../x86_64-w64-mingw32/bin/ld: ../libctf/.libs/libctf.a(ctf-open.o): in function `ctf_bufopen_internal':
/home/simark/src/binutils-gdb/libctf/ctf-open.c:1342: undefined reference to `bswap_16'
/usr/lib/gcc/x86_64-w64-mingw32/9.2.0/../../../../x86_64-w64-mingw32/bin/ld: ../libctf/.libs/libctf.a(ctf-open-bfd.o): in function `ctf_fdopen':
/home/simark/src/binutils-gdb/libctf/ctf-open-bfd.c:268: undefined reference to `bswap_16'
Apparently [1], if we have a function with `inline` but not `static`,
there should be a compilation unit defining the symbol too.
Alternatively, making those functions `static` fixes that.
[1] https://stackoverflow.com/questions/16245521/c99-inline-function-in-c-file/16254679#16254679
libctf/ChangeLog:
* swap.h (bswap_16, bswap_32, bswap_64): Make static.
Change-Id: I8fd12aedf6c90f9b7418af948e5e0bae0c32eead
We currently have 12 KFAILS in gdb.base/infcall-nested-structs.exp for
PR tdep/25096.
A minimal version of the failure looks like this. Consider test.c:
...
struct s { int c; struct { int a; float b; } s1; };
struct s ref = { 0, { 'a', 'b' } };
int __attribute__((noinline,noclone)) check (struct s arg)
{ return arg.s1.a == 'a' && arg.s1.b == 'b' && arg.c == 0; }
int main (void)
{ return check (ref); }
...
When calling 'check (ref)' from main, we have '1' as expected:
...
$ g++ test.c -g ; ./a.out ; echo $?
1
...
But when calling 'check (ref)' from the gdb prompt, we get '0':
...
$ gdb a.out -batch -ex start -ex "p check (ref)"
Temporary breakpoint 1 at 0x400518: file test.c, line 8.
Temporary breakpoint 1, main () at test.c:8
8 { return check (ref); }
$1 = 0
...
The layout of struct s is this:
- the field c occupies 4 bytes at offset 0,
- the s1.a field occupies 4 bytes at offset 4, and
- the s1.b field occupies 4 bytes at offset 8.
When compiling at -O2, we can see from the disassembly of main:
...
4003f0: 48 8b 3d 31 0c 20 00 mov 0x200c31(%rip),%rdi \
# 601028 <ref>
4003f7: f3 0f 10 05 31 0c 20 movss 0x200c31(%rip),%xmm0 \
# 601030 <ref+0x8>
4003fe: 00
4003ff: e9 ec 00 00 00 jmpq 4004f0 <_Z5check1s>
...
that check is called with fields c and s1.a passed in %rdi, and s1.b passed
in %xmm0.
However, the classification in theclass (a variable representing the first and
second eightbytes, to put it in SYSV X86_64 psABI terms) in
amd64_push_arguments is incorrect:
...
(gdb) p theclass
$1 = {AMD64_INTEGER, AMD64_INTEGER}
...
and therefore the struct is passed using %rdi and %rsi instead of using %rdi
and %xmm0, which explains the failure.
The reason that we're misclassifying the argument in amd64_classify_aggregate
has to do with how nested struct are handled.
Rather than using fields c and s1.a for the first eightbyte, and using field
s1.b for the second eightbyte, instead field c is used for the first
eightbyte, and fields s1.a and s1.b are classified together in an intermediate
eightbyte, which is then used to merge with both the first and second
eightbyte.
Fix this by factoring out a new function amd64_classify_aggregate_field, and
letting it recursively handle fields of nested structs.
Tested on x86_64-linux.
Tested with g++ 4.8.5, 7.4.1, 8.3.1, 9.2.1.
Tested with clang++ 5.0.2 (which requires removing additional_flags=-Wno-psabi
and adding additional_flags=-Wno-deprecated).
gdb/ChangeLog:
2019-10-16 Tom de Vries <tdevries@suse.de>
PR tdep/25096
* amd64-tdep.c (amd64_classify_aggregate_field): Factor out of ...
(amd64_classify_aggregate): ... here.
(amd64_classify_aggregate_field): Handled fiels of nested structs
recursively.
gdb/testsuite/ChangeLog:
2019-10-16 Tom de Vries <tdevries@suse.de>
PR tdep/25096
* gdb.base/infcall-nested-structs.exp: Remove PR25096 KFAILs.
Change-Id: Id55c74755f0a431ce31223acc86865718ae0c123
Atm, when executing gdb.base/infcall-nested-structs.exp on x86_64-linux, we get:
...
FAIL: gdb.base/infcall-nested-structs.exp: l=c++: types-tc-tf: \
p/d check_arg_struct_02_01 (ref_val_struct_02_01)
FAIL: gdb.base/infcall-nested-structs.exp: l=c++: types-ts-tf: \
p/d check_arg_struct_02_01 (ref_val_struct_02_01)
FAIL: gdb.base/infcall-nested-structs.exp: l=c++: types-ti-tf: \
p/d check_arg_struct_02_01 (ref_val_struct_02_01)
=== gdb Summary ===
nr of expected passes 9255
nr of unexpected failures 3
nr of expected failures 142
...
The 3 FAILs are reported as PR tdep/25096.
The 142 XFAILs are for a gdb assertion failure, reported in PR tdep/24104,
which should have been KFAILs since there's a problem in gdb rather than in
the environment.
A minimal version of the assertion failure looks like this. Consider test.c:
...
struct s { struct { } es1; long f; };
struct s ref = { {}, 'f' };
int __attribute__((noinline,noclone)) check (struct s arg)
{ return arg.f == 'f'; }
int main (void)
{ return check (ref); }
...
When calling 'check (ref)' from main, we have '1' as expected:
...
$ g++ test3.c -g && ( ./a.out; echo $? )
1
...
But when calling 'check (ref)' from the gdb prompt, we get:
...
$ gdb a.out -batch -ex start -ex "p check (ref)"
Temporary breakpoint 1 at 0x4004f7: file test.c, line 8.
Temporary breakpoint 1, main () at test.c:8
8 { return check (ref); }
src/gdb/amd64-tdep.c:982: internal-error: \
CORE_ADDR amd64_push_arguments(regcache*, int, value**, CORE_ADDR, \
function_call_return_method): \
Assertion `!"Unexpected register class."' failed.
...
The assert happens in this loop in amd64_push_arguments:
...
for (j = 0; len > 0; j++, len -= 8)
{
int regnum = -1;
int offset = 0;
switch (theclass[j])
{
case AMD64_INTEGER:
regnum = integer_regnum[integer_reg++];
break;
case AMD64_SSE:
regnum = sse_regnum[sse_reg++];
break;
case AMD64_SSEUP:
gdb_assert (sse_reg > 0);
regnum = sse_regnum[sse_reg - 1];
offset = 8;
break;
default:
gdb_assert (!"Unexpected register class.");
}
...
}
...
when processing theclass[0], which is AMD64_NO_CLASS:
...
(gdb) p theclass
$1 = {AMD64_NO_CLASS, AMD64_INTEGER}
...
The layout of struct s is that the empty field es1 occupies one byte (due to
c++) at offset 0, and the long field f occupies 8 bytes at offset 8.
When compiling at -O2, we can see from the disassembly of main:
...
4003f0: 48 8b 3d 41 0c 20 00 mov 0x200c41(%rip),%rdi \
# 601038 <ref+0x8>
4003f7: e9 e4 00 00 00 jmpq 4004e0 <_Z5check1s>
4003fc: 0f 1f 40 00 nopl 0x0(%rax)
...
that check is called with field f passed in %rdi, meaning that the
classification in theclass is correct, it's just not supported in the loop in
amd64_push_arguments mentioned above.
Fix the assert by implementing support for 'AMD64_NO_CLASS' in that loop.
This exposes 9 more FAILs of the PR tdep/25096 type, so mark all 12 of them as
KFAIL.
Tested on x86_64-linux.
Tested with g++ 4.8.5, 7.4.1, 8.3.1, 9.2.1. With 4.8.5, 3 of the 12 KFAILs
are KPASSing.
Tested with clang++ 5.0.2 (which requires removing additional_flags=-Wno-psabi
and adding additional_flags=-Wno-deprecated).
gdb/ChangeLog:
2019-10-16 Tom de Vries <tdevries@suse.de>
PR tdep/24104
* amd64-tdep.c (amd64_push_arguments): Handle AMD64_NO_CLASS in loop
that handles 'theclass'.
gdb/testsuite/ChangeLog:
2019-10-16 Tom de Vries <tdevries@suse.de>
PR tdep/24104
* gdb.base/infcall-nested-structs.exp: Remove XFAIL for PR tdep/24104.
Add KFAIL for PR tdep/25096.
Change-Id: I8b66345bbf5c00209ca75b1209fd4d60b36e9ede
With g++-4.8, I see:
...
(gdb) PASS: gdb.cp/local-static.exp: c++: print free_inline_func(void)
print 'S::method()'::S_M_s_var_int^M
No symbol "S_M_s_var_int" in specified context.^M
(gdb) FAIL: gdb.cp/local-static.exp: c++: print 'S::method()'::S_M_s_var_int
...
The variable is declared like this (showing pruned .ii):
...
void S::method ()
{
static int S_M_s_var_int = 4;
}
...
But the DWARF generated for the variable is encapsulated in an unnamed lexical
block:
...
<1><121>: Abbrev Number: 5 (DW_TAG_structure_type)
<122> DW_AT_name : S
...
<2><14f>: Abbrev Number: 6 (DW_TAG_subprogram)
...
<150> DW_AT_name : (indirect string, offset: 0x599): method
<156> DW_AT_linkage_name: (indirect string, offset: 0x517): \
_ZN1S6methodEv /* demangled: dS::method() */
...
<1><3f8>: Abbrev Number: 21 (DW_TAG_subprogram)
<3f9> DW_AT_specification: <0x14f>
...
<3fe> DW_AT_low_pc : 0x4004fc
<406> DW_AT_high_pc : 0x2c /* 0x400528 */
...
<2><418>: Abbrev Number: 17 (DW_TAG_formal_parameter)
<419> DW_AT_name : (indirect string, offset: 0x68a): this
...
<2><424>: Abbrev Number: 18 (DW_TAG_lexical_block)
<425> DW_AT_low_pc : 0x400508
<42d> DW_AT_high_pc : 0x1e /* 0x400526 */
<3><435>: Abbrev Number: 22 (DW_TAG_variable)
<436> DW_AT_name : (indirect string, offset: 0x29d): S_M_s_var_int
...
which has the effect that the variable is not addressable unless the program
counter is in the range of the lexical block.
This is caused by gcc PR debug/55541, which was fixed in gcc 5.
Mark in total 225 FAILs as XFAIL.
Tested on x86_64-linux.
gdb/testsuite/ChangeLog:
2019-10-16 Tom de Vries <tdevries@suse.de>
PR testsuite/25059
* gdb.cp/local-static.exp (do_test): Add xfails for gcc PR debug/55541.
Change-Id: Ibe86707eecffc79f1bb474d7928ea7d0c39a00a2
On openSUSE Leap 15.1 (as well as on Fedora-x86_64-m64 buildbot) I see:
...
FAIL: gdb.base/jit-reader.exp: with jit-reader: after mangling: current frame: info registers
...
The problem is that r10 is printed signed:
...
r10 0xffffffffffffffb0 -80^M
...
but the regexp expects a signed value:
...
"r10 $hex +$decimal" \
...
Fix this by allowing signed values.
Tested on x86_64-linux.
gdb/testsuite/ChangeLog:
2019-10-16 Tom de Vries <tdevries@suse.de>
* gdb.base/jit-reader.exp: Allow non-pointer registers to be printed
as signed.
Change-Id: Ie494d24fad7a9af7ac6bfaf731c4aa04f1333830
This implements padding of orphan executable sections for PowerPC.
Of course, the simple implementation of bfd_arch_ppc_nop_fill and
removing the NOP definition didn't work, with powerpc64 hitting a
testsuite failure linking to S-records. That's because the srec
target is BFD_ENDIAN_UNKNOWN so the test of bfd_big_endian (abfd) in
default_data_link_order therefore returned false, resulting in a
little-endian nop pattern. The rest of the patch fixes that problem
by adding a new field to bfd_link_info that can be used to determine
actual endianness on targets like srec.
PR 13616
include/
* bfdlink.h (struct bfd_link_info <big_endian>): New field.
bfd/
* cpu-powerpc.c (bfd_arch_ppc_nop_fill): New function, use it
for all ppc arch info.
* linker.c (default_data_link_order): Pass info->big_endian to
arch_info->fill function.
ld/
* emulparams/elf64lppc.sh (NOP): Don't define.
* emulparams/elf64ppc.sh (NOP): Don't define.
* ldwrite.c (build_link_order): Use link_info.big_endian. Move
code determining endian to use for data_statement to..
* ldemul.c (after_open_default): ..here. Set link_info.big_endian.
opcodes * rx-dis.c (get_register_name): New function. Provides safe
access to name array.
(get_condition_name, get_flag_name, get_double_register_name)
(get_double_register_high_name, get_double_register_low_name)
(get_double_control_register_name, get_double_condition_name):
Likewise.
(print_insn_rx): Use the accessor functions.
Some of the comments in this file are ancient and no longer reflect
reality. This patch removes those comments, and also the description
of ld options emitted to script files. While describing what an
option does in the script file might help reinforce what the option
does, it's unnecessary and makes for overlong lines. Also, some of
the descriptions did not mention all the options.
* genscripts.sh: Correct comments. Remove outdated comment block
saying "Generate 5 or 6 script files..". Remove description of
ld options from comment emitted to script files, and order options
as per comment block in genscripts.sh saying which scripts are
generated.
Not much to see here, just reduce the number of calls to S_GET_VALUE
and symbol_symbolS in the comparison functions.
* config/tc-xtensa.c (xg_order_trampoline_chain_entry): Don't
call S_GET_VALUE multiple times for a symbol. Rearrange code
so it is obvious what is the primary sort key.
(xg_order_trampoline_chain): Similarly.
This comit:
commit 0dc327459b
Date: Mon Oct 7 16:38:53 2019 +0100
gdb: Remove vec.{c,h} and update code to not include vec.h
Broke the GDB build due to leaving a reference to vec-ipa.o in the
Makefile.in, this file is built from vec.c which has been removed.
I got away with this as I had an old version of the vec-ipa.o file
still in my build tree.
With this commit in place a clean build now completed successfully.
gdb/ChangeLog:
* Makefile.in: Remove references to vec-ipa.o.
Change-Id: I4cf55951158dd7ee8f60cd054311a7c367e1d7bf
With the removal of the old VEC mechanism from the code base, update
comments that still make reference to VECs. There should be no user
visible changes after this commit.
gdb/ChangeLog:
* linespec.c (decode_digits_ordinary): Update comment.
* make-target-delegates: No longer need to handle VEC case.
* memrange.c (normalize_mem_ranges): Update comment.
* namespace.c (add_using_directive): Update comment.
* objc-lang.c (uniquify_strings): Update comment.
* ppc-linux-nat.c (struct thread_points): Update comment.
* probe.h (find_probes_in_objfile): Update comment.
* target.h (enum flash_preserve_mode): Update comment.
* varobj.c (varobj_restrict_range): Update comment.
* varobj.h (varobj_list_children): Update comment.
Change-Id: Iefd2e903705c3e79cd13b43395c7a1c167f9a088
This removes a use of VEC from GDB, from dwarf2read.c. This removal
is not very clean, and would probably benefit from additional
refactoring in the future.
The problem here is that the VEC is contained within struct
dwarf2_per_cu_data, which is treated as POD in dwarf2read.c. As such
it is actually a VEC pointer. When converting this to a std::vector
in an ideal world we would not use a std::vector pointer, and use the
std::vector directly. Sadly, to do that would require some rewriting
in dwarf2read.c - my concern would be introducing bugs during this
rewrite.
If we move to a std::vector pointer then we need to take care to
handle the case where the pointer is null. The old VEC library would
handle null for us, making the VEC interface very clean. With
std::vector we need to handle the null pointer case ourselves.
The achieve this then I've added a small number of function that wrap
up access to the std::vector, hopefully hiding the null pointer
management.
The final ugliness with this conversion is that, ideally, when
wrapping a data member behind an interface I would make the data
member private, however, treating the structure as POD once again
prevents this, so we are left with the data member being public, but
access (ideally) being through the published interface functions.
There should be no user visible changes after this commit.
gdb/ChangeLog:
* gdb/dwarf2read.c (dwarf2_per_objfile::~dwarf2_per_objfile):
Update for new std::vector based implementation.
(process_psymtab_comp_unit_reader): Likewise.
(scan_partial_symbols): Likewise.
(recursively_compute_inclusions): Likewise.
(compute_compunit_symtab_includes): Likewise.
(process_imported_unit_die): Likewise.
(queue_and_load_dwo_tu): Likewise.
(follow_die_sig_1): Likewise.
* gdb/dwarf2read.h: Remove DEF_VEC_P.
(typedef dwarf2_per_cu_ptr): Remove.
(struct dwarf2_per_cu_data) <imported_symtabs_empty>: New
function.
(struct dwarf2_per_cu_data) <imported_symtabs_push>: New function.
(struct dwarf2_per_cu_data) <imported_symtabs_size>: New function.
(struct dwarf2_per_cu_data) <imported_symtabs_free>: New function.
(struct dwarf2_per_cu_data) <imported_symtabs>: Change to
std::vector.
Change-Id: Id0f4bda977c9dd83b0ba3d7fb42f7e5e2b6869c8
One spot in windows-nat.c uses %ld to print the TID, but all other
spots use %x, as does the infrun logging. This makes it unnecessarily
hard to tell which other log messages correspond to this one. This
patch changes the one outlier to use %x.
gdb/ChangeLog
2019-10-15 Tom Tromey <tromey@adacore.com>
* windows-nat.c (windows_nat_target::resume): Use %x when logging
TID.
Change-Id: Ic66efeb8a7ec08e7fb007320318f51acbf976734
A couple of spots in windows-nat.c used the name "pid" to refer to the
thread ID. I found this confusing, so this patch changes the names.
gdb/ChangeLog
2019-10-15 Tom Tromey <tromey@adacore.com>
* windows-nat.c (windows_nat_target::fetch_registers)
(windows_nat_target::store_registers): Rename "pid" to "tid".
Change-Id: Ia1a447e8da822d01ad94a5ca3760342bbdc0e66c
This patch was inspired by a recent review that recommended using
std::string in a new implementation of the gcc_target_options gdbarch
function. It changes this function to return std::string rather than
an ordinary xmalloc'd string.
I believe this caught a latent memory leak in compile.c:get_args.
Tested on x86-64 Fedora 29.
gdb/ChangeLog
2019-10-15 Tom Tromey <tromey@adacore.com>
* gdbarch.h, gdbarch.c: Rebuild.
* gdbarch.sh (gcc_target_options): Change return type to
std::string.
* compile/compile.c (get_args): Update.
* nios2-tdep.c (nios2_gcc_target_options): Return std::string.
* arm-linux-tdep.c (arm_linux_gcc_target_options): Return
std::string.
* aarch64-linux-tdep.c (aarch64_linux_gcc_target_options): Return
std::string.
* arch-utils.c (default_gcc_target_options): Return std::string.
* arch-utils.h (default_gcc_target_options): Return std::string.
* s390-tdep.c (s390_gcc_target_options): Return std::string.
Change-Id: I51f61703426a323089e646da8f22320a2cafbc1f
That's an internal variable of breakpoint.c. Insted, use
iterate_over_breakpoints to update the breakpoint list.
gdb/ChangeLog:
2019-10-15 Christian Biesinger <cbiesinger@google.com>
* breakpoint.c (breakpoint_chain): Make static.
* tui/tui-winsource.c: Call iterate_over_breakpoints instead
of accessing breakpoint_chain.
Change-Id: Ic259b2c3a4c1f5a47f34cfd7fccbdcf274417429
* elf32-m68hc1x.c (reloc_warning): Add printf attribute.
(elf32_m68hc11_relocate_section): Don't use a variable for format
strings. Delete some unnecessary xgettext:c-format comments.
The infcall-nested-structs test case yields 36 FAILs on s390x because GCC
and GDB disagree on how to pass a C++ struct like this as an argument to a
function:
struct s { float x; static float y; };
For the purpose of argument passing, GCC ignores static fields, while GDB
does not. Thus GCC passes the argument in a floating-point register and
GDB passes it via memory.
Fix this by explicitly ignoring static fields when detecting single-field
structs.
gdb/ChangeLog:
* s390-tdep.c (s390_effective_inner_type): Ignore static fields
when unwrapping single-field structs.
Also fixes m68hc1x printf arguments which would have bombed when
compiling on a 32-bit host with --enable-64-bit-bfd.
bfd/
PR 24955
* elf32-arm.c (set_cmse_veneer_addr_from_implib): Use bfd_malloc
rather than xmalloc.
* elf32-m68hc1x.c (reloc_warning): New function.
(elf32_m68hc11_relocate_section): Use it here. Cast bfd_vma values
corresponding to %lx in format strings.
* elf32-nds32.c (nds32_insertion_sort): Use a stack temporary.
gas/
* config/tc-nds32.c (nds32_set_section_relocs): Use relocs and n
parameters rather than equivalent sec->orelocation and
sec->reloc_count. Don't sort for n <= 1. Tidy.
On openSUSE Leap 15.1, we have:
...
FAIL: gdb.ada/mi_task_arg.exp: -stack-list-arguments 1 (unexpected output)
...
The problem is that the stack-list-arguments command prints a frame argument
'self_id' for function system.tasking.stages.task_wrapper:
...
frame={level="2",args=[{name="self_id",value="0x12345678"}]
...
where none (args=[]) is expected.
The frame argument is in fact correct. The FAIL does not show for say, fedora
30, because there the executable uses the system.tasking.stages.task_wrapper
from /lib64/libgnarl-9.so. Adding "additional_flags=-bargs
additional_flags=-shared additional_flags=-largs" to the flags argument of
gdb_compile_ada gives us the same PASS, but installing libada7-debuginfo gets
us the same FAIL again.
Fix the FAIL by allowing the 'self_id' argument.
Tested on x86_64-linux.
Change-Id: I5aee5856fa6aeb0cc78aa4fe69deecba5b00b77a
Commit 580f1034 ("Increase timeout in
gdb.mi/list-thread-groups-available.exp") changed
gdb.mi/list-thread-groups-available.exp to significantly increase the
timeout, which was necessary for when running with make check-read1.
Pedro suggested a better alternative, which is to use gdb_test_multiple
and consume one entry at a time. This patch does that.
gdb/testsuite/ChangeLog:
* gdb.mi/list-thread-groups-available.exp: Read entries one by
one instead of increasing timeout.
Change-Id: I51b689458503240f24e401f054e6583d9172ebdf
ctor_cmp had an ineffective comparison of addresses in an attempt to
ensure sort stability. Comparing the addresses passed to the
comparison function can't work since those addresses may be from an
array that is already perturbed by qsort.
* ldctor.h (struct set_element): Make next field a union, adding
idx field.
* ldctor.c (ctor_cmp): Dereference pointer and lose unnecessary
const. Replace final sort on pointer value with final sort on idx.
(ldctor_add_set_entry): Adjust next field access.
(ldctor_build_sets): Likewise. Set u.idx field for sort.
This patch ensures qsort stability in line and function sorting done
in dwarf2.c. For the line sequences we make use of an existing field
that isn't used until later, as a monotonic counter for the qsort.
* dwarf2.c (struct lookup_funcinfo): Add idx field.
(compare_lookup_funcinfos): Perform final sort on idx.
(build_lookup_funcinfo_table): Set idx.
(compare_sequences): Perform final sort on num_lines.
(build_line_info_table): Set num_lines and line_info_lookup earlier.
(sort_line_sequences): Set num_lines for sort.
This particular sort almost certainly does not need to be stable for
the ELF linker to work correctly. However it is conceivable that an
unstable sort could affect linker output, and thus different output be
seen with differing qsort implementations. The argument goes like
this: Given more than one strong alias symbol of equal section, value,
and size, the aliases will compare equal by elf_sort_symbol and thus
which one is chosen as the "real" symbol to be made dynamic depends on
qsort. Why would anyone define two symbols at the same address?
Well, sometimes the fact that there are more than one strong alias
symbol is due to linker script symbols like __bss_start being made
dynamic. This will match the first symbol defined in .bss if it
doesn't have correct size, and forgetting to properly set size and
type of symbols isn't as rare as it should be.
This patch adds some more heuristics to elf_sort_symbol.
* elflink.c (elf_sort_symbol): Sort on type and name as well.
(elf_link_add_object_symbols): Style fix.
elf_sort_sections tried to ensure a stable qsort by using target_index
as the final comparison, but target_index hasn't been set by anything
at the time elf_sort_sections was run. This patch arrange to have
target_index set.
* elf.c (_bfd_elf_map_sections_to_segments): Init target_index
for sections about to be sorted.
(assign_file_positions_for_load_sections): Likewise.
(elf_sort_sections): Don't bother optimising both TOEND case.
* elflink.c (bfd_elf_final_link): Reset target_index.
The linker SHF_LINK_ORDER section sorting had a number of defects.
1) The ordering was by VMA, which won't work with overlays. LMA is
better.
2) Zero size sections can result in two sections at the same LMA/VMA.
When only one of the two sections at the same LMA is zero size,
that one must be first.
3) Warnings given by elf_get_linked_section_vma won't ever be emitted
since elf_object_p warns and excludes objects with zero sh_link on
a SHF_LINK_ORDER section.
4) Section offset was adjusted down rather than up by section
alignment, possibly creating overlapping sections.
5) Finding the linked section did so the hard way, rather than simply
using elf_linked_to_section.
* elflink.c (elf_get_linked_section_vma): Delete.
(compare_link_order): Use elf_linked_to_section and sort by lma,
size, and id.
(elf_fixup_link_order): Use size_t variables where appropriate.
Make use of elf_linked_to_section. Formatting. Properly align
sections.
