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
s390_insert_operand ()'s val, min and max are encoded PCRel32 values
and need to be left-shifted by 1 before being shown to the user.
Left-shifting negative values is undefined behavior in C, but the
current code does not try to prevent it, causing UBSan to complain.
Fix by casting the values to their unsigned equivalents before
shifting.
The handle_file_event function has a few unnecessary {} lexical
blocks, presumably because they were originally if blocks, and the
conditions were removed, or something along those lines.
Remove the unnecessary blocks, and reindent.
Change-Id: Iaecbe5c9f4940a80b81dbbc42e51ce506f6aafb2
gdbsupport/event-loop.cc throughout handles the case of use_poll being
true on a system where HAVE_POLL is not defined, by calling
internal_error if that situation ever happens.
Simplify this by moving the "use_poll" global itself under HAVE_POLL,
so that it's way more unlikely to ever end up in such a situation.
Then, move the code that checks the value of use_poll under HAVE_POLL
too, and remove the internal_error calls. Like, from:
if (use_poll)
{
#ifdef HAVE_POLL
// poll code
#else
internal_error (....);
#endif /* HAVE_POLL */
}
else
{
// select code
}
to
#ifdef HAVE_POLL
if (use_poll)
{
// poll code
}
else
#endif /* HAVE_POLL */
{
// select code
}
While at it, make use_poll be a bool. The current code is using
unsigned char most probably to save space, but I don't think it really
matters here.
Co-Authored-By: Youling Tang <tangyouling@loongson.cn>
Change-Id: I0dd74fdd4d393ccd057906df4cd75e8e83c1cdb4
The breakpoint c++-ification series introduced another bug in Ada --
it caused "catch exception" and related commands to fail on Windows.
The problem is that the re_set method calls the wrong superclass
method, so the breakpoint doesn't get correctly re-set when the
runtime offsets change. This patch fixes the problem.
Many test cases had a few lines in the beginning that look like:
if { condition } {
continue
}
Where conditions varied, but were mostly in the form of ![runto_main] or
[skip_*_tests], making it quite clear that this code block was supposed
to finish the test if it entered the code block. This generates TCL
errors, as most of these tests are not inside loops. All cases on which
this was an obvious mistake are changed in this patch.
cooked_index::m_start is unused and can be removed. I think this was
a leftover from a previous approach in the index finalization code,
and then when rewriting it I forgot to remove it.
Tested by rebuilding.
I noticed that gdbserver did not implement pid_to_exec_file for
Windows, while gdb did implement it. This patch moves the code to
nat/windows-nat.c, so that it can be shared. This makes the gdbserver
implementation trivial.
This changes target_pid_to_exec_file and target_ops::pid_to_exec_file
to return a "const char *". I couldn't build many of these targets,
but did examine the code by hand -- also, as this only affects the
return type, it's normally pretty safe. This brings gdb and gdbserver
a bit closer, and allows for the removal of a const_cast as well.
I noticed that corefile-run.core ends up in the 'runtest' directory.
It's better, when at all possible, for test files to end up in the
test's designated subdirectory. This patch makes this change.
This changes coffread.c to avoid re-reading minimal symbols when
possible. This only works when there are no COFF symbols to be read,
but at least for my mingw builds of gdb, this seems to be the case.
Tested using the AdaCore internal test suite on Windows. I also did
some local builds to ensure that no warnings crept in.
If you load a core file into GDB with the --write option, or "set
write on" (equivalent), and then poke memory expecting it to patch the
core binary, you'll notice something odd -- the write seems to
succeed, but in reality, it doesn't. The value you wrote doesn't
persist. Like so:
$ gdb -q --write -c testsuite/outputs/gdb.base/patch/gcore.test
[New LWP 615986]
Core was generated by `/home/pedro/gdb/build/gdb/testsuite/outputs/gdb.base/patch/patch'.
Program terminated with signal SIGTRAP, Trace/breakpoint trap.
#0 0x0000555555555131 in ?? ()
(gdb) p *(unsigned char *)0x0000555555555131 = 1
$1 = 1 '\001'
(gdb) p *(unsigned char *)0x0000555555555131
$2 = 185 '\271'
(gdb)
Diffing hexdumps of before/after patching, reveals that a "0x1" was
actually written somewhere in the file. The problem is that the "0x1"
was written at the wrong offset in the file...
That happens because _bfd_elf_set_section_contents does this to seek
to the section's offset:
pos = hdr->sh_offset + offset;
if (bfd_seek (abfd, pos, SEEK_SET) != 0
|| bfd_bwrite (location, count, abfd) != count)
return false;
... and 'hdr->sh_offset' is zero, so we seek to just OFFSET, which is
incorrect. The reason 'hdr->sh_offset' is zero is that
kernel-generated core files normally don't even have a section header
table (gdb-generated ones do, but that's more an accident than a
feature), and indeed elf_core_file_p doesn't even try to read sections
at all:
/* Core files are simply standard ELF formatted files that partition
the file using the execution view of the file (program header table)
rather than the linking view. In fact, there is no section header
table in a core file.
The process status information (including the contents of the general
register set) and the floating point register set are stored in a
segment of type PT_NOTE. We handcraft a couple of extra bfd sections
that allow standard bfd access to the general registers (.reg) and the
floating point registers (.reg2). */
bfd_cleanup
elf_core_file_p (bfd *abfd)
Changing _bfd_elf_set_section_contents from:
pos = hdr->sh_offset + offset;
to:
pos = section->filepos + offset;
fixes it. If we do that however, the tail end of
_bfd_elf_set_section_contents ends up as a copy of
_bfd_generic_set_section_contents, so just call the latter, thus
eliminating some duplicate code.
New GDB testcase included, which exercises both patching an executable
and patching a core file. Patching an executable already works
without this fix, because in that case BFD reads in the sections
table. Still, we had no testcase for that yet. In fact, we have no
"set write on" testcases at all, this is the first one.
Tested on x86-64 GNU/Linux, gdb, ld, binutils, and gas.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=18227
Change-Id: I0f49f58b48aabab2e269f2959b8fd8a7fe36fdce
PTR will soon disappear from ansidecl.h. Remove uses in sim. Where
a PTR cast is used in assignment or function args to a void* I've
simply removed the unnecessary (in C) cast rather than replacing with
(void *).
When running test-case gdb.cp/break-f-std-string.exp on openSUSE Leap 15.3
with system gcc 7.5.0, I run into:
...
(gdb) whatis /r std::string^M
No symbol "string" in namespace "std".^M
(gdb) FAIL: gdb.cp/break-f-std-string.exp: _GLIBCXX_USE_CXX11_ABI=1: \
whatis /r std::string
...
The same for gcc 8.2.1, but it passes with gcc 9.3.1.
At source level (as we can observe in the .ii file with -save-temps) we have
indeed:
...
namespace std {
namespace __cxx11 {
typedef basic_string<char> string;
}
}
...
while with gcc 9.3.1, we have instead:
...
namespace std {
namespace __cxx11 {
...
}
typedef basic_string<char> string;
}
...
due to gcc commit 33b43b0d8cd ("Define std::string and related typedefs
outside __cxx11 namespace").
Fix this by adding the missing typedef for gcc version 5 (the first version to
have the dual abi) to 8 (the last version missing aforementioned gcc commit).
Tested on x86_64-linux, with:
- system gcc 7.5.0
- gcc 4.8.5, 8.2.1, 9.3.1, 10.3.0, 11.2.1
- clang 8.0.1, 12.0.1
PR 29006
* pe-dll.c (dll_name): Delete, replacing with..
(dll_filename): ..this, moved earlier in file.
(generate_edata): Delete parameters. Don't set up dll_name here..
(pe_process_import_defs): ..instead set up dll_filename and
dll_symname here before returning.
(dll_symname_len): Delete write-only variable.
(pe_dll_generate_implib): Don't set up dll_symname here.
Just like on s390x with g++ 11.2.1, ppc64le with g++ 11.3.1 produces a
spurious warning for stringop-overread in debuginfod_is_enabled
for url_view. Also suppress it on powerpc64.
gdb/ChangeLog:
* debuginfod-support.c (debuginfod_is_enabled): Use
DIAGNOSTIC_IGNORE_STRINGOP_OVERREAD on powerpc64.
There are assumptions in the test about the long double format
being used. While the results are OK for i387 128-bit long doubles, it
is not correct for IEEE quad 128-bit long doubles.
Also, depending on the target (64-bit/32-bit), long doubles may not
be available at all. And it may be the case that the compiler for a 64-bit
target doesn't support 128-bit long doubles, but GDB might still support it
internally.
Lastly, not every long double format has invalid values. Some formats
consider all values as valid floating point numbers.
These divergences cause the following FAIL's on aarch64/arm:
FAIL: gdb.ada/float-bits.exp: print val_long_double
FAIL: gdb.ada/float-bits.exp: print val_long_double after assignment
With the above in mind, extend the test a little so it behaves well on
different architectures and so it works with different long double
formats.
Main changes:
- Use long double values appropriate for the long double format.
- Test long double assignment to compiler-generated long
double variables.
- Test long double assignment to GDB internal variables.
Tested on x86_64 (16 PASS), i686 (16 PASS), aarch64 (12 PASS) and arm (9 PASS).
On aarch64-linux, with test-case gdb.dwarf2/dw2-out-of-range-end-of-seq.exp I
run into:
...
(gdb) run ^M
Starting program: dw2-out-of-range-end-of-seq ^M
^M
Program received signal SIGILL, Illegal instruction.^M
main () at src/gdb/testsuite/gdb.dwarf2/main.c:1^M
1 /* This testcase is part of GDB, the GNU debugger.^M
(gdb) FAIL: gdb.dwarf2/dw2-out-of-range-end-of-seq.exp: runto: run to main
...
There are two problems here:
- the test-case contains a hardcoded "DW_LNS_advance_pc 1" which causes the
breakpoint pointing in the middle of an insn
- the FAIL triggers on aarch64-linux, but not on x86_64-linux, because the
test-case uses 'main_label' as the address of the first and only valid entry
in the line table, and:
- on aarch64-linux, there's no prologue, so main_label and main coincide,
while
- on x86_64-linux, there's a prologue, so main_label is different from main.
Fix these problems by:
- eliminating the use of "DW_LNS_advance_pc 1", and using
"DW_LNE_set_address $main_end" instead, and
- eliminating the use of main_label, using "DW_LNE_set_address $main_start"
instead.
Tested on both x86_64-linux and aarch64-linux.
The new test failed on s390-linux due to bfd_sprintf_vma trimming
output to 32 bits for 32-bit targets. The test was faulty anyway,
expecting zero as the min end of the range is plainly wrong, but
that's what you get if you cast min to int.
* config/tc-s390.c (s390_insert_operand): Print range error using
PRId64.
* testsuite/gas/s390/zarch-z900-err.l: Correct expected output.
When doing a gdb build without --enable-targets, I run into:
...
(gdb) UNSUPPORTED: gdb.base/catch-syscall.exp: multiple targets: \
s390:31-bit vs s390:64-bit: set architecture s390:64-bit
delete breakpoints^M
(gdb) info breakpoints^M
No breakpoints or watchpoints.^M
(gdb) break -qualified main^M
No symbol table is loaded. Use the "file" command.^M
Make breakpoint pending on future shared library load? (y or [n]) n^M
(gdb) FAIL: gdb.base/catch-syscall.exp: gdb_breakpoint: set breakpoint at main
...
The problem is that due to recent commit e21d8399303 ("[gdb/testsuite] Remove
target limits in gdb.base/catch-syscall.exp") "clean_restart $binfile" no
longer is called at the end of test_catch_syscall_multi_arch.
Fix this by moving "clean_restart $binfile" back to
test_catch_syscall_multi_arch.
Tested on x86_64-linux.
On powerpc64le-linux, I ran into:
...
FAIL: gdb.base/maint.exp: maint print objfiles: symtabs
...
The problem is that:
- the "Cooked index in use" line occurs twice in the gdb output:
- once for exec maint, and
- once for "Object file system-supplied DSO".
- the matching of the second "Cooked index in use" also consumes
the "Symtabs:" string, and consequently the corresponding
clause does not trigger and $symtabs remains 0.
Fix this by limiting the output of the command to the exec.
Tested on x86_64-linux and powerpcle-linux.
In test-case gdb.base/catch-syscall.exp, proc test_catch_syscall_multi_arch we
test for supported targets using istarget, like so:
...
if { [istarget "i*86-*-*"] || [istarget "x86_64-*-*"] } {
...
} elseif { [istarget "powerpc-*-linux*"] \
|| [istarget "powerpc64*-linux*"] } {
...
...
but the tests excercised there can all be executed if gdb is configured with
--enable-targets=all.
Rewrite the proc to iterate over all cases, and check if the test is supported
by trying "set arch $arch1" and "set arch $arch2".
Tested on x86_64-linux, with:
- a gdb build with --enable-targets=all, and
- a gdb build build with my usual --enable-targets setting (too long to
include here) which means the sparc vs sparc:v9 case is unsupported.
When running test-case gdb.reverse/fstatat-reverse.exp with target board
unix/-m32 on openSUSE Tumbleweed, I run into:
...
(gdb) PASS: gdb.reverse/fstatat-reverse.exp: set breakpoint at marker2
continue^M
Continuing.^M
Process record and replay target doesn't support syscall number 383^M
Process record: failed to record execution log.^M
^M
Program stopped.^M
0xf7fc5555 in __kernel_vsyscall ()^M
(gdb) FAIL: gdb.reverse/fstatat-reverse.exp: continue to breakpoint: marker2
...
The problems is that while with native we're trying to record these syscalls
(showing strace output):
...
openat(AT_FDCWD, "/", O_RDONLY|O_PATH) = 3
newfstatat(3, ".", {st_mode=S_IFDIR|0755, st_size=146, ...}, 0) = 0
...
with unix/-m32 we have instead:
...
openat(AT_FDCWD, "/", O_RDONLY|O_PATH) = 3
statx(3, ".", AT_STATX_SYNC_AS_STAT|AT_NO_AUTOMOUNT, STATX_BASIC_STATS, \
{stx_mask=STATX_ALL|STATX_MNT_ID, stx_attributes=STATX_ATTR_MOUNT_ROOT, \
stx_mode=S_IFDIR|0755, stx_size=146, ...}) = 0
...
and statx is not supported.
Fix this by adding support for recording syscall statx.
Tested on x86_64-linux.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=28461
$ objdump -d outputs/gdb.base/large-frame/large-frame-O2
0000000120000b20 <func>:
120000b20: 67bdbff0 daddiu sp,sp,-16400
120000b24: ffbc4000 sd gp,16384(sp)
120000b28: 3c1c0002 lui gp,0x2
120000b2c: 679c8210 daddiu gp,gp,-32240
120000b30: 0399e02d daddu gp,gp,t9
120000b34: df998058 ld t9,-32680(gp)
120000b38: ffbf4008 sd ra,16392(sp)
120000b3c: 0411ffd8 bal 120000aa0 <blah>
...
The disassembly of the above func function shows that we may use
instructions such as daddiu/daddu, so add "daddiu $gp,$gp,n",
"daddu $gp,$gp,$t9" and "daddu $gp,$t9,$gp" to the mips32_scan_prologue
function to fix the large-frame.exp test case.
Before applying the patch:
backtrace
#0 blah (a=0xfffffee220) at .../gdb/testsuite/gdb.base/large-frame-1.c:24
#1 0x0000000120000b44 in func ()
Backtrace stopped: frame did not save the PC
(gdb) FAIL: gdb.base/large-frame.exp: optimize=-O2: backtrace
# of expected passes 5
# of unexpected failures 1
After applying the patch:
# of expected passes 6
Signed-off-by: Youling Tang <tangyouling@loongson.cn>
PR build/29110 points out that GDB fails to build on mingw when the
"win32" thread model is in use. It turns out that the Fedora cross
tools using the "posix" thread model, which somehow manages to support
std::future, whereas the win32 model does not.
While looking into this, I found that the configuring with
--disable-threading will also cause a build failure.
This patch fixes this build by introducing a compatibility wrapper for
std::future.
I am not able to test the win32 thread model build, but I'm going to
ask the reporter to try this patch.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=29110
If you try to set a breakpoint at a function such as "b
f(std::string)", and the current language is C, the breakpoint fails
to be set, like so:
(gdb) set language c
break f(std::string)
Function "f(std::string)" not defined.
Make breakpoint pending on future shared library load? (y or [n]) n
(gdb)
The problem is that the code in GDB that expands the std::string
typedef hits this in c-typeprint.c:
/* If we have "typedef struct foo {. . .} bar;" do we want to
print it as "struct foo" or as "bar"? Pick the latter for
C++, because C++ folk tend to expect things like "class5
*foo" rather than "struct class5 *foo". We rather
arbitrarily choose to make language_minimal work in a C-like
way. */
if (language == language_c || language == language_minimal)
{
if (type->code () == TYPE_CODE_UNION)
gdb_printf (stream, "union ");
else if (type->code () == TYPE_CODE_STRUCT)
{
if (type->is_declared_class ())
gdb_printf (stream, "class ");
else
gdb_printf (stream, "struct ");
}
else if (type->code () == TYPE_CODE_ENUM)
gdb_printf (stream, "enum ");
}
I.e., std::string is expanded to "class std::..." instead of just
"std::...", and then the "f(class std::..." symbol doesn't exist.
Fix this by making cp-support.c:inspect_type print the expanded
typedef type using the language of the symbol whose type we're
expanding the typedefs for -- in the example in question, the
"std::string" typedef symbol, which is a C++ symbol.
Use type_print_raw_options as it seems to me that in this scenario we
always want raw types, to match the real symbol names.
Adjust the gdb.cp/break-f-std-string.exp testcase to try setting a
breakpoint at "f(std::string)" in both C and C++.
Change-Id: Ib54fab4cf0fd307bfd55bf1dd5056830096a653b
