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When doing a gdbserver build with CFLAGS/CXXFLAGS/LDFLAGS=-fsanitize=address
we run into:
...
ld: ../libiberty/libiberty.a(safe-ctype.o):
relocation R_X86_64_32 against `.data' can not be used when making a
shared object; recompile with -fPIC
collect2: error: ld returned 1 exit status
make[1]: *** [libinproctrace.so] Error 1
...
This started with commit 96648494173 "gdbsupport: make use of safe-ctype
functions from libiberty", which introduced a dependency of libinproctrace.so
on libiberty.
Fix this in gdbserver/Makefile.in by using a setup similar to what is done in
gcc-repo/src/libcc1/Makefile.am, such that ../libiberty/noasan/libiberty.a is
used instead.
Build on x86_64-linux, both with and without -fsanitize=address.
gdbserver/ChangeLog:
2021-01-07 Tom de Vries <tdevries@suse.de>
* Makefile.in (LIBIBERTY_NORMAL, LIBIBERTY_NOASAN, LIBIBERTY_PIC):
(LIBIBERTY_FOR_SHLIB): New var.
(LIBIBERTY): Set using $(LIBIBERTY_NORMAL).
(IPA_LIB): Use LIBIBERTY_FOR_SHLIB instead of LIBIBERTY in target rule.
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I spent a lot of time reading infrun debug logs recently, and I think
they could be made much more readable by being indented, to clearly see
what operation is done as part of what other operation. In the current
format, there are no visual cues to tell where things start and end,
it's just a big flat list. It's also difficult to understand what
caused a given operation (e.g. a call to resume_1) to be done.
To help with this, I propose to add the new scoped_debug_start_end
structure, along with a bunch of macros to make it convenient to use.
The idea of scoped_debug_start_end is simply to print a start and end
message at construction and destruction. It also increments/decrements
a depth counter in order to make debug statements printed during this
range use some indentation. Some care is taken to handle the fact that
debug can be turned on or off in the middle of such a range. For
example, a "set debug foo 1" command in a breakpoint command, or a
superior GDB manually changing the debug_foo variable.
Two macros are added in gdbsupport/common-debug.h, which are helpers to
define module-specific macros:
- scoped_debug_start_end: takes a message that is printed both at
construction / destruction, with "start: " and "end: " prefixes.
- scoped_debug_enter_exit: prints hard-coded "enter" and "exit"
messages, to denote the entry and exit of a function.
I added some examples in the infrun module to give an idea of how it can
be used and what the result looks like. The macros are in capital
letters (INFRUN_SCOPED_DEBUG_START_END and
INFRUN_SCOPED_DEBUG_ENTER_EXIT) to mimic the existing SCOPE_EXIT, but
that can be changed if you prefer something else.
Here's an excerpt of the debug
statements printed when doing "continue", where a displaced step is
started:
[infrun] proceed: enter
[infrun] proceed: addr=0xffffffffffffffff, signal=GDB_SIGNAL_DEFAULT
[infrun] global_thread_step_over_chain_enqueue: enqueueing thread Thread 0x7ffff75a5640 (LWP 2289301) in global step over chain
[infrun] start_step_over: enter
[infrun] start_step_over: stealing global queue of threads to step, length = 1
[infrun] start_step_over: resuming [Thread 0x7ffff75a5640 (LWP 2289301)] for step-over
[infrun] resume_1: step=1, signal=GDB_SIGNAL_0, trap_expected=1, current thread [Thread 0x7ffff75a5640 (LWP 2289301)] at 0x5555555551bd
[displaced] displaced_step_prepare_throw: displaced-stepping Thread 0x7ffff75a5640 (LWP 2289301) now
[displaced] prepare: selected buffer at 0x5555555550c2
[displaced] prepare: saved 0x5555555550c2: 1e fa 31 ed 49 89 d1 5e 48 89 e2 48 83 e4 f0 50
[displaced] amd64_displaced_step_copy_insn: copy 0x5555555551bd->0x5555555550c2: c7 45 fc 00 00 00 00 eb 13 8b 05 d4 2e 00 00 83
[displaced] displaced_step_prepare_throw: prepared successfully thread=Thread 0x7ffff75a5640 (LWP 2289301), original_pc=0x5555555551bd, displaced_pc=0x5555555550c2
[displaced] resume_1: run 0x5555555550c2: c7 45 fc 00
[infrun] infrun_async: enable=1
[infrun] prepare_to_wait: prepare_to_wait
[infrun] start_step_over: [Thread 0x7ffff75a5640 (LWP 2289301)] was resumed.
[infrun] operator(): step-over queue now empty
[infrun] start_step_over: exit
[infrun] proceed: start: resuming threads, all-stop-on-top-of-non-stop
[infrun] proceed: resuming Thread 0x7ffff7da7740 (LWP 2289296)
[infrun] resume_1: step=0, signal=GDB_SIGNAL_0, trap_expected=0, current thread [Thread 0x7ffff7da7740 (LWP 2289296)] at 0x7ffff7f7d9b7
[infrun] prepare_to_wait: prepare_to_wait
[infrun] proceed: resuming Thread 0x7ffff7da6640 (LWP 2289300)
[infrun] resume_1: thread Thread 0x7ffff7da6640 (LWP 2289300) has pending wait status status->kind = stopped, signal = GDB_SIGNAL_TRAP (currently_stepping=0).
[infrun] prepare_to_wait: prepare_to_wait
[infrun] proceed: [Thread 0x7ffff75a5640 (LWP 2289301)] resumed
[infrun] proceed: resuming Thread 0x7ffff6da4640 (LWP 2289302)
[infrun] resume_1: thread Thread 0x7ffff6da4640 (LWP 2289302) has pending wait status status->kind = stopped, signal = GDB_SIGNAL_TRAP (currently_stepping=0).
[infrun] prepare_to_wait: prepare_to_wait
[infrun] proceed: end: resuming threads, all-stop-on-top-of-non-stop
[infrun] proceed: exit
We can easily see where the call to `proceed` starts and end. We can
also see why there are a bunch of resume_1 calls, it's because we are
resuming threads, emulating all-stop on top of a non-stop target.
We also see that debug statements nest well with other modules that have
been migrated to use the "new" debug statement helpers (because they all
use debug_prefixed_vprintf in the end. I think this is desirable, for
example we could see the debug statements about reading the DWARF info
of a library nested under the debug statements about loading that
library.
Of course, modules that haven't been migrated to use the "new" helpers
will still print without indentations. This will be one good reason to
migrate them.
I think the runtime cost (when debug statements are disabled) of this is
reasonable, given the improvement in readability. There is the cost of
the conditionals (like standard debug statements), one more condition
(if (m_must_decrement_print_depth)) and the cost of constructing a stack
object, which means copying a fews pointers.
Adding the print in fetch_inferior_event breaks some tests that use "set
debug infrun", because it prints a debug statement after the prompt. I
adapted these tests to cope with it, by using the "-prompt" switch of
gdb_test_multiple to as if this debug statement is part of the expected
prompt. It's unfortunate that we have to do this, but I think the debug
print is useful, and I don't want a few tests to get in the way of
adding good debug output.
gdbsupport/ChangeLog:
* common-debug.h (debug_print_depth): New.
(struct scoped_debug_start_end): New.
(scoped_debug_start_end): New.
(scoped_debug_enter_exit): New.
* common-debug.cc (debug_prefixed_vprintf): Print indentation.
gdb/ChangeLog:
* debug.c (debug_print_depth): New.
* infrun.h (INFRUN_SCOPED_DEBUG_START_END): New.
(INFRUN_SCOPED_DEBUG_ENTER_EXIT): New.
* infrun.c (start_step_over): Use
INFRUN_SCOPED_DEBUG_ENTER_EXIT.
(proceed): Use INFRUN_SCOPED_DEBUG_ENTER_EXIT and
INFRUN_SCOPED_DEBUG_START_END.
(fetch_inferior_event): Use INFRUN_SCOPED_DEBUG_ENTER_EXIT.
gdbserver/ChangeLog:
* debug.cc (debug_print_depth): New.
gdb/testsuite/ChangeLog:
* gdb.base/ui-redirect.exp: Expect infrun debug print after
prompt.
* gdb.threads/ia64-sigill.exp: Likewise.
* gdb.threads/watchthreads-reorder.exp: Likewise.
Change-Id: I7c3805e6487807aa63a1bae318876a0c69dce949
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This commits the result of running gdb/copyright.py as per our Start
of New Year procedure...
gdb/ChangeLog
Update copyright year range in copyright header of all GDB files.
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gdb/ChangeLog:
* top.c (print_gdb_version): Update copyright year.
gdbserver/ChangeLog:
* server.cc (gdbserver_version): Update copyright year.
* gdbreplay.cc (gdbreplay_version): Likewise.
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When inserting hw watchpoints, we take care of masking off the top byte
of the address (and sign-extending it if needed). This guarantees we won't
pass tagged addresses to the kernel via ptrace.
However, from the kernel documentation on tagged pointers...
"Non-zero tags are not preserved when delivering signals. This means that
signal handlers in applications making use of tags cannot rely on the tag
information for user virtual addresses being maintained for fields inside
siginfo_t.
One exception to this rule is for signals raised in response to watchpoint
debug exceptions, where the tag information will be preserved."
So the stopped data address after a hw watchpoint hit can be potentially
tagged, and we don't handle this in GDB at the moment. This results in
GDB missing a hw watchpoint hit and attempting to step over an unsteppable
hw watchpoint, causing it to spin endlessly.
The following patch fixes this by adjusting the stopped data address and adds
some tests to expose the problem.
gdb/ChangeLog:
2020-12-16 Luis Machado <luis.machado@linaro.org>
* aarch64-linux-nat.c
(aarch64_linux_nat_target::stopped_data_address): Handle the TBI.
gdbserver/ChangeLog:
2020-12-16 Luis Machado <luis.machado@linaro.org>
* linux-aarch64-low.cc (address_significant): New function.
(aarch64_target::low_stopped_data_address): Handle the TBI.
gdb/testsuite/ChangeLog:
2020-12-16 Luis Machado <luis.machado@linaro.org>
* gdb.arch/aarch64-tagged-pointer.c (main): Add a few more
pointer-based memory accesses.
* gdb.arch/aarch64-tagged-pointer.exp: Exercise additional
hw watchpoint cases.
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Make use of the safe-ctype replacements for the standard ctype
character checking functions in gdbsupport/common-utils.cc. The
gdbsupport library is included into both gdb and gdbserver, and on the
gdbserver side there are two targets, gdbserver itself, and also
libinproctrace.so.
libiberty was already being included in the gdbserver link command,
but was missing from the libinproctrace.so link. As a result, after
changing gdbsupport/common-utils.cc to depend on libiberty,
libinproctrace.so would no longer link until I modified its link line.
gdbserver/ChangeLog:
* Makefile.in (IPA_LIB): Include libiberty library.
gdbsupport/ChangeLog:
* gdbsupport/common-utils.cc: Change 'ctype.h' include to
'safe-ctype.h'.
(extract_string_maybe_quoted): Use safe-ctype function versions.
(is_digit_in_base): Likewise.
(digit_to_int): Likewise.
(strtoulst): Likewise.
(skip_spaces): Likewise.
(skip_to_space): Likewise.
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The help text for the --disable-packet option was missing one of the
possible values.
As this option is for maintainers only it is explicitly not documented
in gdb/doc/gdb.texinfo, so no update is needed there.
gdbserver/ChangeLog:
* server.cc (gdbserver_usage): Add missing option to usage text.
(gdbserver_show_disableable): Likewise.
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Many spots incorrectly use only spaces for indentation (for example,
there are a lot of spots in ada-lang.c). I've always found it awkward
when I needed to edit one of these spots: do I keep the original wrong
indentation, or do I fix it? What if the lines around it are also
wrong, do I fix them too? I probably don't want to fix them in the same
patch, to avoid adding noise to my patch.
So I propose to fix as much as possible once and for all (hopefully).
One typical counter argument for this is that it makes code archeology
more difficult, because git-blame will show this commit as the last
change for these lines. My counter counter argument is: when
git-blaming, you often need to do "blame the file at the parent commit"
anyway, to go past some other refactor that touched the line you are
interested in, but is not the change you are looking for. So you
already need a somewhat efficient way to do this.
Using some interactive tool, rather than plain git-blame, makes this
trivial. For example, I use "tig blame <file>", where going back past
the commit that changed the currently selected line is one keystroke.
It looks like Magit in Emacs does it too (though I've never used it).
Web viewers of Github and Gitlab do it too. My point is that it won't
really make archeology more difficult.
The other typical counter argument is that it will cause conflicts with
existing patches. That's true... but it's a one time cost, and those
are not conflicts that are difficult to resolve. I have also tried "git
rebase --ignore-whitespace", it seems to work well. Although that will
re-introduce the faulty indentation, so one needs to take care of fixing
the indentation in the patch after that (which is easy).
gdb/ChangeLog:
* aarch64-linux-tdep.c: Fix indentation.
* aarch64-ravenscar-thread.c: Fix indentation.
* aarch64-tdep.c: Fix indentation.
* aarch64-tdep.h: Fix indentation.
* ada-lang.c: Fix indentation.
* ada-lang.h: Fix indentation.
* ada-tasks.c: Fix indentation.
* ada-typeprint.c: Fix indentation.
* ada-valprint.c: Fix indentation.
* ada-varobj.c: Fix indentation.
* addrmap.c: Fix indentation.
* addrmap.h: Fix indentation.
* agent.c: Fix indentation.
* aix-thread.c: Fix indentation.
* alpha-bsd-nat.c: Fix indentation.
* alpha-linux-tdep.c: Fix indentation.
* alpha-mdebug-tdep.c: Fix indentation.
* alpha-nbsd-tdep.c: Fix indentation.
* alpha-obsd-tdep.c: Fix indentation.
* alpha-tdep.c: Fix indentation.
* amd64-bsd-nat.c: Fix indentation.
* amd64-darwin-tdep.c: Fix indentation.
* amd64-linux-nat.c: Fix indentation.
* amd64-linux-tdep.c: Fix indentation.
* amd64-nat.c: Fix indentation.
* amd64-obsd-tdep.c: Fix indentation.
* amd64-tdep.c: Fix indentation.
* amd64-windows-tdep.c: Fix indentation.
* annotate.c: Fix indentation.
* arc-tdep.c: Fix indentation.
* arch-utils.c: Fix indentation.
* arch/arm-get-next-pcs.c: Fix indentation.
* arch/arm.c: Fix indentation.
* arm-linux-nat.c: Fix indentation.
* arm-linux-tdep.c: Fix indentation.
* arm-nbsd-tdep.c: Fix indentation.
* arm-pikeos-tdep.c: Fix indentation.
* arm-tdep.c: Fix indentation.
* arm-tdep.h: Fix indentation.
* arm-wince-tdep.c: Fix indentation.
* auto-load.c: Fix indentation.
* auxv.c: Fix indentation.
* avr-tdep.c: Fix indentation.
* ax-gdb.c: Fix indentation.
* ax-general.c: Fix indentation.
* bfin-linux-tdep.c: Fix indentation.
* block.c: Fix indentation.
* block.h: Fix indentation.
* blockframe.c: Fix indentation.
* bpf-tdep.c: Fix indentation.
* break-catch-sig.c: Fix indentation.
* break-catch-syscall.c: Fix indentation.
* break-catch-throw.c: Fix indentation.
* breakpoint.c: Fix indentation.
* breakpoint.h: Fix indentation.
* bsd-uthread.c: Fix indentation.
* btrace.c: Fix indentation.
* build-id.c: Fix indentation.
* buildsym-legacy.h: Fix indentation.
* buildsym.c: Fix indentation.
* c-typeprint.c: Fix indentation.
* c-valprint.c: Fix indentation.
* c-varobj.c: Fix indentation.
* charset.c: Fix indentation.
* cli/cli-cmds.c: Fix indentation.
* cli/cli-decode.c: Fix indentation.
* cli/cli-decode.h: Fix indentation.
* cli/cli-script.c: Fix indentation.
* cli/cli-setshow.c: Fix indentation.
* coff-pe-read.c: Fix indentation.
* coffread.c: Fix indentation.
* compile/compile-cplus-types.c: Fix indentation.
* compile/compile-object-load.c: Fix indentation.
* compile/compile-object-run.c: Fix indentation.
* completer.c: Fix indentation.
* corefile.c: Fix indentation.
* corelow.c: Fix indentation.
* cp-abi.h: Fix indentation.
* cp-namespace.c: Fix indentation.
* cp-support.c: Fix indentation.
* cp-valprint.c: Fix indentation.
* cris-linux-tdep.c: Fix indentation.
* cris-tdep.c: Fix indentation.
* darwin-nat-info.c: Fix indentation.
* darwin-nat.c: Fix indentation.
* darwin-nat.h: Fix indentation.
* dbxread.c: Fix indentation.
* dcache.c: Fix indentation.
* disasm.c: Fix indentation.
* dtrace-probe.c: Fix indentation.
* dwarf2/abbrev.c: Fix indentation.
* dwarf2/attribute.c: Fix indentation.
* dwarf2/expr.c: Fix indentation.
* dwarf2/frame.c: Fix indentation.
* dwarf2/index-cache.c: Fix indentation.
* dwarf2/index-write.c: Fix indentation.
* dwarf2/line-header.c: Fix indentation.
* dwarf2/loc.c: Fix indentation.
* dwarf2/macro.c: Fix indentation.
* dwarf2/read.c: Fix indentation.
* dwarf2/read.h: Fix indentation.
* elfread.c: Fix indentation.
* eval.c: Fix indentation.
* event-top.c: Fix indentation.
* exec.c: Fix indentation.
* exec.h: Fix indentation.
* expprint.c: Fix indentation.
* f-lang.c: Fix indentation.
* f-typeprint.c: Fix indentation.
* f-valprint.c: Fix indentation.
* fbsd-nat.c: Fix indentation.
* fbsd-tdep.c: Fix indentation.
* findvar.c: Fix indentation.
* fork-child.c: Fix indentation.
* frame-unwind.c: Fix indentation.
* frame-unwind.h: Fix indentation.
* frame.c: Fix indentation.
* frv-linux-tdep.c: Fix indentation.
* frv-tdep.c: Fix indentation.
* frv-tdep.h: Fix indentation.
* ft32-tdep.c: Fix indentation.
* gcore.c: Fix indentation.
* gdb_bfd.c: Fix indentation.
* gdbarch.sh: Fix indentation.
* gdbarch.c: Re-generate
* gdbarch.h: Re-generate.
* gdbcore.h: Fix indentation.
* gdbthread.h: Fix indentation.
* gdbtypes.c: Fix indentation.
* gdbtypes.h: Fix indentation.
* glibc-tdep.c: Fix indentation.
* gnu-nat.c: Fix indentation.
* gnu-nat.h: Fix indentation.
* gnu-v2-abi.c: Fix indentation.
* gnu-v3-abi.c: Fix indentation.
* go32-nat.c: Fix indentation.
* guile/guile-internal.h: Fix indentation.
* guile/scm-cmd.c: Fix indentation.
* guile/scm-frame.c: Fix indentation.
* guile/scm-iterator.c: Fix indentation.
* guile/scm-math.c: Fix indentation.
* guile/scm-ports.c: Fix indentation.
* guile/scm-pretty-print.c: Fix indentation.
* guile/scm-value.c: Fix indentation.
* h8300-tdep.c: Fix indentation.
* hppa-linux-nat.c: Fix indentation.
* hppa-linux-tdep.c: Fix indentation.
* hppa-nbsd-nat.c: Fix indentation.
* hppa-nbsd-tdep.c: Fix indentation.
* hppa-obsd-nat.c: Fix indentation.
* hppa-tdep.c: Fix indentation.
* hppa-tdep.h: Fix indentation.
* i386-bsd-nat.c: Fix indentation.
* i386-darwin-nat.c: Fix indentation.
* i386-darwin-tdep.c: Fix indentation.
* i386-dicos-tdep.c: Fix indentation.
* i386-gnu-nat.c: Fix indentation.
* i386-linux-nat.c: Fix indentation.
* i386-linux-tdep.c: Fix indentation.
* i386-nto-tdep.c: Fix indentation.
* i386-obsd-tdep.c: Fix indentation.
* i386-sol2-nat.c: Fix indentation.
* i386-tdep.c: Fix indentation.
* i386-tdep.h: Fix indentation.
* i386-windows-tdep.c: Fix indentation.
* i387-tdep.c: Fix indentation.
* i387-tdep.h: Fix indentation.
* ia64-libunwind-tdep.c: Fix indentation.
* ia64-libunwind-tdep.h: Fix indentation.
* ia64-linux-nat.c: Fix indentation.
* ia64-linux-tdep.c: Fix indentation.
* ia64-tdep.c: Fix indentation.
* ia64-tdep.h: Fix indentation.
* ia64-vms-tdep.c: Fix indentation.
* infcall.c: Fix indentation.
* infcmd.c: Fix indentation.
* inferior.c: Fix indentation.
* infrun.c: Fix indentation.
* iq2000-tdep.c: Fix indentation.
* language.c: Fix indentation.
* linespec.c: Fix indentation.
* linux-fork.c: Fix indentation.
* linux-nat.c: Fix indentation.
* linux-tdep.c: Fix indentation.
* linux-thread-db.c: Fix indentation.
* lm32-tdep.c: Fix indentation.
* m2-lang.c: Fix indentation.
* m2-typeprint.c: Fix indentation.
* m2-valprint.c: Fix indentation.
* m32c-tdep.c: Fix indentation.
* m32r-linux-tdep.c: Fix indentation.
* m32r-tdep.c: Fix indentation.
* m68hc11-tdep.c: Fix indentation.
* m68k-bsd-nat.c: Fix indentation.
* m68k-linux-nat.c: Fix indentation.
* m68k-linux-tdep.c: Fix indentation.
* m68k-tdep.c: Fix indentation.
* machoread.c: Fix indentation.
* macrocmd.c: Fix indentation.
* macroexp.c: Fix indentation.
* macroscope.c: Fix indentation.
* macrotab.c: Fix indentation.
* macrotab.h: Fix indentation.
* main.c: Fix indentation.
* mdebugread.c: Fix indentation.
* mep-tdep.c: Fix indentation.
* mi/mi-cmd-catch.c: Fix indentation.
* mi/mi-cmd-disas.c: Fix indentation.
* mi/mi-cmd-env.c: Fix indentation.
* mi/mi-cmd-stack.c: Fix indentation.
* mi/mi-cmd-var.c: Fix indentation.
* mi/mi-cmds.c: Fix indentation.
* mi/mi-main.c: Fix indentation.
* mi/mi-parse.c: Fix indentation.
* microblaze-tdep.c: Fix indentation.
* minidebug.c: Fix indentation.
* minsyms.c: Fix indentation.
* mips-linux-nat.c: Fix indentation.
* mips-linux-tdep.c: Fix indentation.
* mips-nbsd-tdep.c: Fix indentation.
* mips-tdep.c: Fix indentation.
* mn10300-linux-tdep.c: Fix indentation.
* mn10300-tdep.c: Fix indentation.
* moxie-tdep.c: Fix indentation.
* msp430-tdep.c: Fix indentation.
* namespace.h: Fix indentation.
* nat/fork-inferior.c: Fix indentation.
* nat/gdb_ptrace.h: Fix indentation.
* nat/linux-namespaces.c: Fix indentation.
* nat/linux-osdata.c: Fix indentation.
* nat/netbsd-nat.c: Fix indentation.
* nat/x86-dregs.c: Fix indentation.
* nbsd-nat.c: Fix indentation.
* nbsd-tdep.c: Fix indentation.
* nios2-linux-tdep.c: Fix indentation.
* nios2-tdep.c: Fix indentation.
* nto-procfs.c: Fix indentation.
* nto-tdep.c: Fix indentation.
* objfiles.c: Fix indentation.
* objfiles.h: Fix indentation.
* opencl-lang.c: Fix indentation.
* or1k-tdep.c: Fix indentation.
* osabi.c: Fix indentation.
* osabi.h: Fix indentation.
* osdata.c: Fix indentation.
* p-lang.c: Fix indentation.
* p-typeprint.c: Fix indentation.
* p-valprint.c: Fix indentation.
* parse.c: Fix indentation.
* ppc-linux-nat.c: Fix indentation.
* ppc-linux-tdep.c: Fix indentation.
* ppc-nbsd-nat.c: Fix indentation.
* ppc-nbsd-tdep.c: Fix indentation.
* ppc-obsd-nat.c: Fix indentation.
* ppc-ravenscar-thread.c: Fix indentation.
* ppc-sysv-tdep.c: Fix indentation.
* ppc64-tdep.c: Fix indentation.
* printcmd.c: Fix indentation.
* proc-api.c: Fix indentation.
* producer.c: Fix indentation.
* producer.h: Fix indentation.
* prologue-value.c: Fix indentation.
* prologue-value.h: Fix indentation.
* psymtab.c: Fix indentation.
* python/py-arch.c: Fix indentation.
* python/py-bpevent.c: Fix indentation.
* python/py-event.c: Fix indentation.
* python/py-event.h: Fix indentation.
* python/py-finishbreakpoint.c: Fix indentation.
* python/py-frame.c: Fix indentation.
* python/py-framefilter.c: Fix indentation.
* python/py-inferior.c: Fix indentation.
* python/py-infthread.c: Fix indentation.
* python/py-objfile.c: Fix indentation.
* python/py-prettyprint.c: Fix indentation.
* python/py-registers.c: Fix indentation.
* python/py-signalevent.c: Fix indentation.
* python/py-stopevent.c: Fix indentation.
* python/py-stopevent.h: Fix indentation.
* python/py-threadevent.c: Fix indentation.
* python/py-tui.c: Fix indentation.
* python/py-unwind.c: Fix indentation.
* python/py-value.c: Fix indentation.
* python/py-xmethods.c: Fix indentation.
* python/python-internal.h: Fix indentation.
* python/python.c: Fix indentation.
* ravenscar-thread.c: Fix indentation.
* record-btrace.c: Fix indentation.
* record-full.c: Fix indentation.
* record.c: Fix indentation.
* reggroups.c: Fix indentation.
* regset.h: Fix indentation.
* remote-fileio.c: Fix indentation.
* remote.c: Fix indentation.
* reverse.c: Fix indentation.
* riscv-linux-tdep.c: Fix indentation.
* riscv-ravenscar-thread.c: Fix indentation.
* riscv-tdep.c: Fix indentation.
* rl78-tdep.c: Fix indentation.
* rs6000-aix-tdep.c: Fix indentation.
* rs6000-lynx178-tdep.c: Fix indentation.
* rs6000-nat.c: Fix indentation.
* rs6000-tdep.c: Fix indentation.
* rust-lang.c: Fix indentation.
* rx-tdep.c: Fix indentation.
* s12z-tdep.c: Fix indentation.
* s390-linux-tdep.c: Fix indentation.
* score-tdep.c: Fix indentation.
* ser-base.c: Fix indentation.
* ser-mingw.c: Fix indentation.
* ser-uds.c: Fix indentation.
* ser-unix.c: Fix indentation.
* serial.c: Fix indentation.
* sh-linux-tdep.c: Fix indentation.
* sh-nbsd-tdep.c: Fix indentation.
* sh-tdep.c: Fix indentation.
* skip.c: Fix indentation.
* sol-thread.c: Fix indentation.
* solib-aix.c: Fix indentation.
* solib-darwin.c: Fix indentation.
* solib-frv.c: Fix indentation.
* solib-svr4.c: Fix indentation.
* solib.c: Fix indentation.
* source.c: Fix indentation.
* sparc-linux-tdep.c: Fix indentation.
* sparc-nbsd-tdep.c: Fix indentation.
* sparc-obsd-tdep.c: Fix indentation.
* sparc-ravenscar-thread.c: Fix indentation.
* sparc-tdep.c: Fix indentation.
* sparc64-linux-tdep.c: Fix indentation.
* sparc64-nbsd-tdep.c: Fix indentation.
* sparc64-obsd-tdep.c: Fix indentation.
* sparc64-tdep.c: Fix indentation.
* stabsread.c: Fix indentation.
* stack.c: Fix indentation.
* stap-probe.c: Fix indentation.
* stubs/ia64vms-stub.c: Fix indentation.
* stubs/m32r-stub.c: Fix indentation.
* stubs/m68k-stub.c: Fix indentation.
* stubs/sh-stub.c: Fix indentation.
* stubs/sparc-stub.c: Fix indentation.
* symfile-mem.c: Fix indentation.
* symfile.c: Fix indentation.
* symfile.h: Fix indentation.
* symmisc.c: Fix indentation.
* symtab.c: Fix indentation.
* symtab.h: Fix indentation.
* target-float.c: Fix indentation.
* target.c: Fix indentation.
* target.h: Fix indentation.
* tic6x-tdep.c: Fix indentation.
* tilegx-linux-tdep.c: Fix indentation.
* tilegx-tdep.c: Fix indentation.
* top.c: Fix indentation.
* tracefile-tfile.c: Fix indentation.
* tracepoint.c: Fix indentation.
* tui/tui-disasm.c: Fix indentation.
* tui/tui-io.c: Fix indentation.
* tui/tui-regs.c: Fix indentation.
* tui/tui-stack.c: Fix indentation.
* tui/tui-win.c: Fix indentation.
* tui/tui-winsource.c: Fix indentation.
* tui/tui.c: Fix indentation.
* typeprint.c: Fix indentation.
* ui-out.h: Fix indentation.
* unittests/copy_bitwise-selftests.c: Fix indentation.
* unittests/memory-map-selftests.c: Fix indentation.
* utils.c: Fix indentation.
* v850-tdep.c: Fix indentation.
* valarith.c: Fix indentation.
* valops.c: Fix indentation.
* valprint.c: Fix indentation.
* valprint.h: Fix indentation.
* value.c: Fix indentation.
* value.h: Fix indentation.
* varobj.c: Fix indentation.
* vax-tdep.c: Fix indentation.
* windows-nat.c: Fix indentation.
* windows-tdep.c: Fix indentation.
* xcoffread.c: Fix indentation.
* xml-syscall.c: Fix indentation.
* xml-tdesc.c: Fix indentation.
* xstormy16-tdep.c: Fix indentation.
* xtensa-config.c: Fix indentation.
* xtensa-linux-nat.c: Fix indentation.
* xtensa-linux-tdep.c: Fix indentation.
* xtensa-tdep.c: Fix indentation.
gdbserver/ChangeLog:
* ax.cc: Fix indentation.
* dll.cc: Fix indentation.
* inferiors.h: Fix indentation.
* linux-low.cc: Fix indentation.
* linux-nios2-low.cc: Fix indentation.
* linux-ppc-ipa.cc: Fix indentation.
* linux-ppc-low.cc: Fix indentation.
* linux-x86-low.cc: Fix indentation.
* linux-xtensa-low.cc: Fix indentation.
* regcache.cc: Fix indentation.
* server.cc: Fix indentation.
* tracepoint.cc: Fix indentation.
gdbsupport/ChangeLog:
* common-exceptions.h: Fix indentation.
* event-loop.cc: Fix indentation.
* fileio.cc: Fix indentation.
* filestuff.cc: Fix indentation.
* gdb-dlfcn.cc: Fix indentation.
* gdb_string_view.h: Fix indentation.
* job-control.cc: Fix indentation.
* signals.cc: Fix indentation.
Change-Id: I4bad7ae6be0fbe14168b8ebafb98ffe14964a695
|
|
... with AC_COMPILE_IFELSE and AC_LANG_PROGRAM.
All changes in the generated configure file are insignificant
whitespace changes.
gdbserver/ChangeLog:
* acinclude.m4: Replace AC_TRY_COMPILE with AC_COMPILE_IFELSE +
AC_LANG_PROGRAM.
* configure: Re-generate.
Change-Id: Idab8b5e1a984046b5283940c02e5a22da2291d58
|
|
... with AC_COMPILE_IFELSE + AC_LANG_PROGRAM. All the changes in the
generated configure files are insignificant whitespace changes.
gdb/ChangeLog:
* configure: Re-generate.
gdbserver/ChangeLog:
* configure: Re-generate.
gdbsupport/ChangeLog:
* common.m4: Replace AC_TRY_COMPILE with AC_COMPILE_IFELSE +
AC_LANG_PROGRAM.
* configure: Re-generate.
Change-Id: Id58e6e887f6be817d52b189921845838031dbd2a
|
|
Replace AC_TRY_COMPILE with AC_COMPILE_IFELSE + AC_LANG_PROGRAM.
All changes in generated configure files are insignificant whitespace
changes.
gdb/ChangeLog:
* configure: Re-generate.
gdbserver/ChangeLog:
* configure: Re-generate.
gdbsupport/ChangeLog:
* configure: Re-generate.
* warning.m4: Replace AC_TRY_COMPILE with AC_COMPILE_IFELSE +
AC_LANG_PROGRAM.
Change-Id: I517bd20ec3af960ad999a586761df0ac8959a3fc
|
|
Replace AC_TRY_COMPILE with AC_COMPILE_IFELSE + AC_LANG_PROGRAM.
All the changes in the generated configure files are insignificant
whitespace changes.
gdb/ChangeLog:
* configure: Re-generate.
gdbserver/ChangeLog:
* configure: Re-generate.
gdbsupport/ChangeLog:
* configure: Re-generate.
* ptrace.m4: Replace AC_TRY_COMPILE with AC_COMPILE_IFELSE +
AC_LANG_PROGRAM.
Change-Id: Ia782b5477fe49dad04e68c0f41c6d8ab3fde5bf0
|
|
For some reason, autoupdate isn't able to grok ptrace.m4:
$ autoupdate ptrace.m4
/usr/bin/m4:/tmp/auYjuodw/input.m4:171: ERROR: end of file in string
autoupdate: /usr/bin/m4 failed with exit status: 1
Honestly, I'm unable to grok it either. This patch re-indents it in a
way that I think is easier to read. With this patch applied, autoupdate
becomes able to parse ptrace.m4, but I chose to keep this re-indent in a
patch of its own.
All the changes in generated configure files consist of insignificant
whitespace changes.
gdb/ChangeLog:
* configure: Re-generate.
gdbserver/ChangeLog:
* configure: Re-generate.
gdbsupport/ChangeLog:
* configure: Re-generate.
* ptrace.m4: Re-indent.
Change-Id: Ie2afab09fecc8b6d0cccccb47ac9756f3843881e
|
|
Run autoupdate on gdbserver/configure.ac and then tweak it to use easier
to read indentation. This removes a few warnings when running
`autoreconf -vf -Wall`.
* Replace AC_INIT with AC_INIT and no arguments plus AC_CONFIG_SRCDIR.
* Replace AC_GNU_SOURCE with AC_USE_SYSTEM_EXTENSIONS.
* Replace AC_TRY_COMPILE with AC_COMPILE_IFELSE.
* Replace AC_TRY_LINK with AC_LINK_IFELSE.
autoupdate gets it right, except this one here:
--- a/gdbserver/configure.ac
+++ b/gdbserver/configure.ac
@@ -304,7 +304,7 @@ if test "$srv_linux_thread_db" = "yes"; then
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],[found="-Wl,--dynamic-list"
RDYNAMIC='-Wl,--dynamic-list=$(srcdir)/proc-service.list'],[RDYNAMIC="-rdynamic"
LDFLAGS="$old_LDFLAGS $RDYNAMIC"
- AC_TRY_LINK([], [],
+ _au_m4_changequote([,])AC_TRY_LINK([], [],
[found="-rdynamic"],
[found="no"
RDYNAMIC=""])])
... which I had to convert manually.
The changes in the generated configure file only contain insignificant
whitespace changes, so that gives confidence that the conversion is
correct.
gdbserver/ChangeLog:
* configure.ac: Modernize.
* configure: Re-generate.
Change-Id: Ia769aaec2aafac595504f477da955e91dffa4d8f
|
|
AC_CANONICAL_SYSTEM
`autoreconf -Wall` notes that AC_CANONICAL_SYSTEM is obsolete:
configure.ac:36: warning: The macro `AC_CANONICAL_SYSTEM' is obsolete.
Replace it by AC_CANONICAL_BUILD, AC_CANONICAL_HOST and
AC_CANONICAL_TARGET in configure.ac files in gdb, gdbserver and
gdbsupport. All three macros may not be needed everywhere, but it is
hard to completely audit the configure files to see which are required,
so I think it's better (and that there's no downside) to just call all
three.
gdb/ChangeLog:
* configure.ac: Use AC_CANONICAL_{BUILD,HOST,TARGET} instead of
AC_CANONICAL_SYSTEM.
* configure: Re-generate.
gdbserver/ChangeLog:
* configure.ac: Use AC_CANONICAL_{BUILD,HOST,TARGET} instead of
AC_CANONICAL_SYSTEM.
* configure: Re-generate.
gdbsupport/ChangeLog:
* configure.ac: Use AC_CANONICAL_{BUILD,HOST,TARGET} instead of
AC_CANONICAL_SYSTEM.
* configure: Re-generate.
Change-Id: Ifd0e21f1e478634e768b5de1b8ee06a7f690d863
|
|
This eliminates the need to specify the return type when using
handle_eintr. We let the compiler deduce it for us.
Also, use lowercase for function parameter names. Uppercase should
only be used on template parameters.
gdb/ChangeLog:
* nat/linux-waitpid.c: Include "gdbsupport/eintr.h".
(my_waitpid): Use gdb::handle_eintr.
gdbserver/ChangeLog:
* netbsd-low.cc (netbsd_waitpid, netbsd_process_target::kill)
(netbsd_qxfer_libraries_svr4): Use gdb::handle_eintr without
explicit type.
gdbsupport/ChangeLog:
* eintr.h (handle_eintr): Replace Ret template parameter with
ErrorValType. Use it as type of the failure value. Deduce the
function's return type using decltype. Use lowercase for function
parameter names.
|
|
ptrace.m4, providing the GDB_AC_PTRACE autoconf macro, is used by gdb,
gdbserver and gdbsupport. I think it would make sense to move it to
gdbsupport.
gdb/ChangeLog:
* acinclude.m4: Update ptrace.m4 path.
* ptrace.m4: Moved to gdbsupport.
gdbserver/ChangeLog:
* acinclude.m4: Update ptrace.m4 path.
gdbsupport/ChangeLog:
* Makefile.in: Re-generate.
* acinclude.m4: Update ptrace.m4 path.
* ptrace.m4: Move here.
Change-Id: I849c149fd5dd8c3b2b0af38654fb353e3727871b
|
|
I get this diff when I re-generate the configure script in gdbserver,
probably leftovers from e911c6663bb8 ("Require kinfo_get_file and
kinfo_get_vmmap for FreeBSD hosts").
gdbserver/ChangeLog:
* config.in: Re-generate.
* configure: Re-generate.
Change-Id: Id19a72ea9f3e7c7b4fdb0f319c9c0bbad0e39aeb
|
|
While trying to build on Cygwin (gcc 10.2.0), I got:
CXX server.o
/home/Baube/src/binutils-gdb/gdbserver/server.cc: In function 'void handle_general_set(char*)':
/home/Baube/src/binutils-gdb/gdbserver/server.cc:832:12: error: 'sprintf' argument 3 overlaps destination object 'own_buf' [-Werror=restrict]
832 | sprintf (own_buf, "E.Unknown thread-events mode requested: %s\n",
| ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
833 | mode);
| ~~~~~
/home/Baube/src/binutils-gdb/gdbserver/server.cc:553:27: note: destination object referenced by 'restrict'-qualified argument 1 was declared here
553 | handle_general_set (char *own_buf)
| ~~~~~~^~~~~~~
There is indeed a problem: mode points somewhere into own_buf. And by
the time mode gets formatted as a %s, whatever it points to has been
overwritten. I hacked gdbserver to coerce it into that error path, and
this is the resulting message:
(gdb) p own_buf
$1 = 0x629000000200 "E.Unknown thread-events mode requested: ad-events mode requested: 00;10:9020fdf7ff7f0000;thread:p49388.49388;core:e;\n"
Fix it by formatting the error string in an std::string first.
gdbserver/ChangeLog:
* server.cc (handle_general_set): Don't use sprintf with
argument overlapping buffer.
Change-Id: I4fdf05c0117f63739413dd67ddae7bd6ee414824
|
|
PR gdb/26742 points out some undefined behavior in gdbserver. The bug
is that remove_thread does:
free_one_thread (thread);
if (current_thread == thread)
current_thread = NULL;
However, the equality check is undefined, because "thread" has already
been freed.
This patch fixes the bug by moving the check earlier.
Tested on x86-64 Fedora 32.
2020-10-20 Tom Tromey <tromey@adacore.com>
PR gdb/26742:
* inferiors.cc (remove_thread): Clear current_thread before
freeing the thread.
|
|
Currently it does not add any value.
The netbsd_tdesc local variable is no longer needed. Remove it.
The tdesc value is set by the low target now.
gdbserver/ChangeLog:
* netbsd-low.cc (netbsd_tdesc): Remove.
(netbsd_add_process): Likewise.
(netbsd_process_target::create_inferior): Update.
|
|
After commit:
commit 51a948fdf0e14fb69ab9e0c79ae8b2415801f9a3
Date: Mon Jul 20 14:18:04 2020 +0100
gdb: Have allocate_target_description return a unique_ptr
There were a few places where we could (should?) have delayed
releasing the target_desc_up until a little later. This commit
catches these cases.
In the case of ARC, the target_desc_up is now exposed right out to
gdbserver, which means making a small change there too.
There should be no user visible changes after this commit.
gdb/ChangeLog:
* arch/aarch32.c (aarch32_create_target_description): Release the
target_desc_up as late as possible.
* arch/aarch64.c (aarch64_create_target_description): Likewise.
* arch/amd64.c (amd64_create_target_description): Likewise.
* arch/arc.c (arc_create_target_description): Return a
target_desc_up, don't release it.
* arch/arc.h (arc_create_target_description): Update declaration.
(arc_lookup_target_description): Move target_desc_up into the
cache, and return a borrowed pointer.
* arch/arm.c (arm_create_target_description): Release the
target_desc_up as late as possible.
* arch/i386.c (i386_create_target_description): Likewise.
* arch/riscv.h (riscv_create_target_description): Update
declaration to match definition.
* arch/tic6x.c (tic6x_create_target_description): Release the
target_desc_up as late as possible.
gdbserver/ChangeLog:
* linux-arc-low.cc (arc_linux_read_description): Release the
unique_ptr returned from arc_create_target_description.
|
|
An issue was reported here related to building GDB on MinGW:
https://sourceware.org/pipermail/gdb/2020-September/048927.html
It was suggested here:
https://sourceware.org/pipermail/gdb/2020-September/048931.html
that the solution might be to make use of $(LIB_GETRANDOM), a variable
defined in the gnulib makefile, when linking GDB.
In fact I think the issue is bigger than just LIB_GETRANDOM. When
using the script binutils-gdb/gnulib/update-gnulib.sh to reimport
gnulib there is a lot of output from gnulib's gnulib-tool. Part of
that output is this:
You may need to use the following makefile variables when linking.
Use them in <program>_LDADD when linking a program, or
in <library>_a_LDFLAGS or <library>_la_LDFLAGS when linking a library.
$(FREXPL_LIBM)
$(FREXP_LIBM)
$(INET_NTOP_LIB)
$(LIBTHREAD)
$(LIB_GETLOGIN)
$(LIB_GETRANDOM)
$(LIB_HARD_LOCALE)
$(LIB_MBRTOWC)
$(LIB_SETLOCALE_NULL)
$(LTLIBINTL) when linking with libtool, $(LIBINTL) otherwise
What I think this is telling us is that we should be including the
value of all these variables on the link line for gdb and gdbserver.
The problem though is that these variables are define in gnulib's
makefile, but are not (necessarily) defined in GDB's makefile.
One solution would be to recreate the checks that gnulib performs in
order to recreate these variables in both gdb's and gdbserver's
makefile. Though this shouldn't be too hard, most (if not all) of
these checks are in the form macros defined in m4 files in the gnulib
tree, so we could just reference these as needed. However, in this
commit I propose a different solution.
Currently, in the top level makefile, we give gdb and gdbserver a
dependency on gnulib. Once gnulib has finished building gdb and
gdbserver can start, these projects then have a hard coded (relative)
path to the compiled gnulib library in their makefiles.
In this commit I extend the gnulib configure script to install a new
makefile fragment in the gnulib build directory. This new file will
have the usual variable substitutions applied to it, and so can
include the complete list (see above) of all the extra libraries that
are needed when linking against gnulib.
In fact the new makefile fragment defines three variables, these are:
LIBGNU: The path to the archive containing gnulib. Can be used as a
dependency as when this file changes gdb/gdbserver should be
relinked.
LIBGNU_EXTRA_LIBS: A list of linker -l.... flags that should be
included in the link line of gdb/gdbserver. These are
libraries that $(LIBGNU) depends on. This list is taken from
the output of gnulib-tool, which is run by our
gnulib/update-gnulib.sh script.
INCGNU: A list of -I.... include paths that should be passed to the
compiler, these are where the gnulib headers can be found.
Now both gdb and gdbserver can include the makefile fragment and make
use of these variables.
The makefile fragment relies on the variable GNULIB_BUILDDIR being
defined. This is checked for in the fragment, and was already defined
in the makefiles of gdb and gdbserver.
gdb/ChangeLog:
* Makefile.in: Include Makefile.gnulib.inc. Don't define LIBGNU
or INCGNU. Make use of LIBGNU_EXTRA_LIBS when linking.
gdbserver/ChangeLog:
* Makefile.in: Include Makefile.gnulib.inc. Don't define LIBGNU
or INCGNU. Make use of LIBGNU_EXTRA_LIBS when linking.
gnulib/ChangeLog:
* Makefile.gnulib.inc.in: New file.
* Makefile.in: Regenerate.
* configure: Regenerate.
* configure.ac: Install the new file.
|
|
Update allocate_target_description to return a target_desc_up, a
specialisation of unique_ptr.
This commit does not attempt to make use of the unique_ptr in the
best possible way, in almost all cases we immediately release the
pointer from within the unique_ptr and then continue as before.
There are a few places where it was easy to handle the unique_ptr, and
in these cases I've done that.
Everything under gdb/features/* is auto-regenerated.
There should be no user visible changes after this commit.
gdb/ChangeLog:
* arch/aarch32.c (aarch32_create_target_description): Release
unique_ptr returned from allocate_target_description.
* arch/aarch64.c (aarch64_create_target_description): Likewise.
* arch/amd64.c (amd64_create_target_description): Likewise.
* arch/arc.c (arc_create_target_description): Likewise.
* arch/arm.c (arm_create_target_description): Likewise.
* arch/i386.c (i386_create_target_description): Likewise.
* arch/riscv.c (riscv_create_target_description): Update return
type. Handle allocate_target_description returning a unique_ptr.
(riscv_lookup_target_description): Update to handle unique_ptr.
* arch/tic6x.c (tic6x_create_target_description): Release
unique_ptr returned from allocate_target_description.
* features/microblaze-with-stack-protect.c: Regenerate.
* features/microblaze.c: Regenerate.
* features/mips-dsp-linux.c: Regenerate.
* features/mips-linux.c: Regenerate.
* features/mips64-dsp-linux.c: Regenerate.
* features/mips64-linux.c: Regenerate.
* features/nds32.c: Regenerate.
* features/nios2.c: Regenerate.
* features/or1k.c: Regenerate.
* features/rs6000/powerpc-32.c: Regenerate.
* features/rs6000/powerpc-32l.c: Regenerate.
* features/rs6000/powerpc-403.c: Regenerate.
* features/rs6000/powerpc-403gc.c: Regenerate.
* features/rs6000/powerpc-405.c: Regenerate.
* features/rs6000/powerpc-505.c: Regenerate.
* features/rs6000/powerpc-601.c: Regenerate.
* features/rs6000/powerpc-602.c: Regenerate.
* features/rs6000/powerpc-603.c: Regenerate.
* features/rs6000/powerpc-604.c: Regenerate.
* features/rs6000/powerpc-64.c: Regenerate.
* features/rs6000/powerpc-64l.c: Regenerate.
* features/rs6000/powerpc-7400.c: Regenerate.
* features/rs6000/powerpc-750.c: Regenerate.
* features/rs6000/powerpc-860.c: Regenerate.
* features/rs6000/powerpc-altivec32.c: Regenerate.
* features/rs6000/powerpc-altivec32l.c: Regenerate.
* features/rs6000/powerpc-altivec64.c: Regenerate.
* features/rs6000/powerpc-altivec64l.c: Regenerate.
* features/rs6000/powerpc-e500.c: Regenerate.
* features/rs6000/powerpc-e500l.c: Regenerate.
* features/rs6000/powerpc-isa205-32l.c: Regenerate.
* features/rs6000/powerpc-isa205-64l.c: Regenerate.
* features/rs6000/powerpc-isa205-altivec32l.c: Regenerate.
* features/rs6000/powerpc-isa205-altivec64l.c: Regenerate.
* features/rs6000/powerpc-isa205-ppr-dscr-vsx32l.c: Regenerate.
* features/rs6000/powerpc-isa205-ppr-dscr-vsx64l.c: Regenerate.
* features/rs6000/powerpc-isa205-vsx32l.c: Regenerate.
* features/rs6000/powerpc-isa205-vsx64l.c: Regenerate.
* features/rs6000/powerpc-isa207-htm-vsx32l.c: Regenerate.
* features/rs6000/powerpc-isa207-htm-vsx64l.c: Regenerate.
* features/rs6000/powerpc-isa207-vsx32l.c: Regenerate.
* features/rs6000/powerpc-isa207-vsx64l.c: Regenerate.
* features/rs6000/powerpc-vsx32.c: Regenerate.
* features/rs6000/powerpc-vsx32l.c: Regenerate.
* features/rs6000/powerpc-vsx64.c: Regenerate.
* features/rs6000/powerpc-vsx64l.c: Regenerate.
* features/rs6000/rs6000.c: Regenerate.
* features/rx.c: Regenerate.
* features/s390-gs-linux64.c: Regenerate.
* features/s390-linux32.c: Regenerate.
* features/s390-linux32v1.c: Regenerate.
* features/s390-linux32v2.c: Regenerate.
* features/s390-linux64.c: Regenerate.
* features/s390-linux64v1.c: Regenerate.
* features/s390-linux64v2.c: Regenerate.
* features/s390-te-linux64.c: Regenerate.
* features/s390-tevx-linux64.c: Regenerate.
* features/s390-vx-linux64.c: Regenerate.
* features/s390x-gs-linux64.c: Regenerate.
* features/s390x-linux64.c: Regenerate.
* features/s390x-linux64v1.c: Regenerate.
* features/s390x-linux64v2.c: Regenerate.
* features/s390x-te-linux64.c: Regenerate.
* features/s390x-tevx-linux64.c: Regenerate.
* features/s390x-vx-linux64.c: Regenerate.
* mips-tdep.c (_initialize_mips_tdep): Release unique_ptr returned
from allocate_target_description.
* target-descriptions.c (allocate_target_description): Update
return type.
(print_c_tdesc::visit_pre): Release unique_ptr returned from
allocate_target_description.
gdbserver/ChangeLog:
* linux-low.cc (linux_process_target::handle_extended_wait):
Release the unique_ptr returned from allocate_target_description.
* linux-riscv-low.cc (riscv_target::low_arch_setup): Likewise.
* linux-x86-low.cc (tdesc_amd64_linux_no_xml): Change type.
(tdesc_i386_linux_no_xml): Change type.
(x86_linux_read_description): Borrow pointer from unique_ptr
object.
(x86_target::get_ipa_tdesc_idx): Likewise.
(initialize_low_arch): Likewise.
* tdesc.cc (allocate_target_description): Update return type.
gdbsupport/ChangeLog:
* tdesc.h (allocate_target_description): Update return type.
|
|
handle_search_memory had some code after a call to error. This code
is dead, and this patch removes it.
gdbserver/ChangeLog
2020-10-07 Tom Tromey <tromey@adacore.com>
* server.cc (handle_search_memory): Remove dead code.
|
|
This replaces gdbserver's memory-searching function with
simple_search_memory.
gdbserver/ChangeLog
2020-10-07 Tom Tromey <tromey@adacore.com>
* server.cc (handle_search_memory_1): Remove.
(handle_search_memory): Use simple_search_memory.
|
|
GDB currently doesn't build cleanly with clang (a -Wdeprecated-copy-dtor
error). I configured my clang-based GDB build with
CXXFLAGS="-Wno-error=deprecated-copy-dtor", so I can use it despite that
problem. However, I found that it had no effect. This is because my
-Wno-error=Wdeprecated-copy-dtor switch is followed by -Werror in the
command line, which switches back all warnings to be errors.
If we want the user-supplied C(XX)FLAGS to be able to override flags
added by our configure script, the user-supplied C(XX)FLAGS should
appear after the configure-supplied flags.
This patch moves the user-supplied CXXFLAGS at the very end of the
compilation command line, which fixes the problem described above. This
means moving it out of INTERNAL_CFLAGS and inlining it in the users of
INTERNAL_CFLAGS.
I observed the problem when building GDB, but the same problem could
happen with GDBserver, so the change is done there too.
In GDBserver, INTERNAL_CFLAGS is passed when linking
gdb/ChangeLog:
* Makefile.in (COMPILE): Add CXXFLAGS.
(INTERNAL_CFLAGS_BASE): Remove CXXFLAGS.
(check-headers): Add CXXFLAGS.
gdbserver/ChangeLog:
* Makefile.in (COMPILE): Add CXXFLAGS.
(INTERNAL_CFLAGS_BASE): Remove CXXFLAGS.
(gdbserver$(EXEEXT)): Add CXXFLAGS.
(gdbreplay$(EXEEXT)): Add CXXFLAGS.
($(IPA_LIB)): Add CXXFLAGS.
(IPAGENT_COMPILE): Add CXXFLAGS.
Change-Id: I00e054506695e0e9536095c6d14827e48abd8f69
|
|
The support is on par with NetBSD/amd64, thus GPR works,
single step and software breakpoint are operational, and the
SVR4 r_debug integration is functional.
gdbserver/ChangeLog:
* netbsd-aarch64-low.cc: Add.
* Makefile.in (SFILES): Register "netbsd-aarch64-low.c".
* configure.srv: Add aarch64*-*-netbsd*.
|
|
Becausae of a copy/paste, I've put myself as the author of the
following patch which was not true:
6d2d7c5668f gdbserver: Add GNU/Linux support for ARC
This change will place the correct date and author in the ChangeLog.
|
|
This gdbserver implementation supports ARC ABI v3 and v4 (older ARC ABI
versions are not supported by other modern GNU tools or Linux itself).
Gdbserver supports inspection of ARC HS registers R30, R58 and R59 - feature
that has been added to Linux 4.12. Whether gdbserver build will actually
support this feature depends on the version of Linux headers used to build
the server.
v2 [1]:
- Use "this->read_memory ()" instead of "the_target->read_memory ()".
- Remove the unnecessary "arch-arc.o:" target from the "Makefile.in".
- Got rid of "ntohs()" function and added lots of comments about
endianness.
- Clarify why "pc" value is read from and saved to different fields
in user regs struct.
- In function "is_reg_name_available_p()", use a range-based iterator
to loop over the registers.
- Removed mentioning of issue number that was not related to sourceware.
- A few typo's fixed.
[1] Remarks
https://sourceware.org/pipermail/gdb-patches/2020-September/171911.html
https://sourceware.org/pipermail/gdb-patches/2020-September/171919.html
gdbserver/ChangeLog:
* configure.srv: Support ARC architecture.
* Makefile.in: Add linux-arc-low.cc and arch/arc.o.
* linux-arc-low.cc: New file.
|
|
Switch from target->read_memory to netbsd_nat::read_memory and
cleanup the code.
No functional change.
gdbserver/ChangeLog:
* netbsd-low.cc (get_dynamic, get_r_debug, read_one_ptr)
(netbsd_qxfer_libraries_svr4): Remove "target" argument and update.
(netbsd_process_target::qxfer_libraries_svr4): Update.
|
|
gdbserver/ChangeLog:
* netbsd-low.cc: Fix whitespace formatting.
* netbsd-amd64-low.cc: Likewise.
|
|
Instead of sharing the native-only code with all BSDs with slightly
different semantics of the kernels, share the NetBSD-only behavior beteen
the NetBSD native and gdbserver setup.
NetBSD does not differentiate the address space I and D in the
operations (contrary to OpenBSD). NetBSD handles EACCES that integrates
with NetBSD specific PaX MPROTECT error handling.
Add a verbose message in the native client that an operation could be
cancelled due to PaX MPROTECT setup.
gdb/ChangeLog:
* nat/netbsd-nat.c (write_memory, read_memory): Add.
* nat/netbsd-nat.h (write_memory, read_memory): Likewise.
* nbsd-nat.c (nbsd_nat_target::xfer_partial): Update.
gdbserver/ChangeLog:
* netbsd-low.cc (netbsd_process_target::read_memory)
(netbsd_process_target::write_memory): Update.
|
|
The support is on par with NetBSD/amd64, thus GPR works,
single step and software breakpoint are operational, and the
SVR4 r_debug integration is functional.
gdbserver/ChangeLog:
* netbsd-aarch64-low.cc: Add.
* Makefile.in (SFILES): Register "netbsd-aarch64-low.c".
* configure.srv: Add aarch64*-*-netbsd*.
|
|
The support is on par with NetBSD/amd64, thus GPR works,
single step and software breakpoint are operational, and the
SVR4 r_debug integration is functional.
gdbserver/ChangeLog:
* netbsd-aarch64-low.cc: Add.
* Makefile.in (SFILES): Register "netbsd-aarch64-low.c".
* configure.srv: Add aarch64*-*-netbsd*.
|
|
The register_data() function in gdbserver/regcache.cc has an
input argument called "fetch". This argument is not used by this
static function at all. Therefore, it is time to get rid of it.
gdbserver/ChangeLog:
* regcache.cc (register_data): Remove unused "fetch" argument.
|
|
Add debug printouts about event loop-related events:
- When a file descriptor handler gets invoked
- When an async event/signal handler gets invoked
gdb/ChangeLog:
* async-event.c (invoke_async_signal_handlers): Add debug
print.
(check_async_event_handlers): Likewise.
* event-top.c (show_debug_event_loop): New function.
(_initialize_event_top): Register "set debug event-loop"
setting.
gdbserver/ChangeLog:
* server.cc (handle_monitor_command): Handle "set
debug-event-loop".
(captured_main): Handle "--debug-event-loop".
(monitor_show_help): Mention new setting.
(gdbserver_usage): Mention new flag.
gdbsupport/ChangeLog:
* event-loop.h (debug_event_loop): New variable declaration.
(event_loop_debug_printf_1): New function declaration.
(event_loop_debug_printf): New macro.
* event-loop.cc (debug_event_loop): New variable.
(handle_file_event): Add debug print.
(event_loop_debug_printf_1): New function.
Change-Id: If78ed3a69179881368e7895b42940ce13b6a1a05
|
|
Assign names to event loop file handlers. They will be used in debug
messages when file handlers are invoked.
In GDB, each UI used to get its own unique number, until commit
cbe256847e19 ("Remove ui::num"). Re-introduce this field, and use it to
make a unique name for the handler.
I'm not too sure what goes on in ser-base.c, all I know is that it's
what is used when debugging remotely. I've just named the main handler
"serial". It would be good to have unique names there too. For instance
when debugging with two different remote connections, we'd ideally want
the handlers to have unique names. I didn't do it in this patch though.
gdb/ChangeLog:
* async-event.c (initialize_async_signal_handlers): Pass name to
add_file_handler
* event-top.c (ui_register_input_event_handler): Likewise.
* linux-nat.c (linux_nat_target::async): Likewise.
* run-on-main-thread.c (_initialize_run_on_main_thread):
Likewise
* ser-base.c (reschedule): Likewise.
(ser_base_async): Likewise.
* tui/tui-io.c: Likewise.
* top.h (struct ui) <num>: New field.
* top.c (highest_ui_num): New variable.
(ui::ui): Initialize num.
gdbserver/ChangeLog:
* linux-low.cc (linux_process_target::async): Pass name to
add_file_handler.
* remote-utils.cc (handle_accept_event): Likewise.
(remote_open): Likewise.
gdbsupport/ChangeLog:
* event-loop.h (add_file_handler): Add "name" parameter.
* event-loop.cc (struct file_handler) <name>: New field.
(create_file_handler): Add "name" parameter, assign it to file
handler.
(add_file_handler): Add "name" parameter.
Change-Id: I9f1545f73888ebb6778eb653a618ca44d105f92c
|
|
The support is on part with NetBSD/amd64, thus GPR works,
single step and software breakpoint are operational, and the
SVR4 r_debug integration is functional.
gdbserver/ChangeLog:
* netbsd-i386-low.cc: Add.
* Makefile.in (SFILES): Register "netbsd-i386-low.c".
* configure.srv: Add i[34567]86-*-netbsd*.
|
|
Replace the pre-C++ construct of netbsd_target_ops, netbsd_regset_info
and netbsd_tdesc with C++ inheritance approach found in the Linux
gdbserver code. Add netbsd_amd64_target, that inherits from the
netbsd_process_target class and add proper singleton object for
the_netbsd_target, initialized from netbsd_amd64_target.
Call low_arch_setup () on post process creation, which sets machine
specific properties of the traced process.
Remove global singleton the_netbsd_target object from the generic
gdbserver code.
This refactoring introduces no functional change from the end-user
point of view.
gdbserver/ChangeLog:
* netbsd-amd64-low.cc (netbsd_x86_64_arch_setup): Remove.
(netbsd_target_regsets): Now const.
(the_low_target): Remove.
(class netbsd_amd64_target, the_netbsd_amd64_target)
(the_netbsd_target): Add.
* netbsd-low.cc (netbsd_process_target::post_create_inferior): Call
low_arch_setup ().
(netbsd_process_target::fetch_registers)
(netbsd_process_target::store_registers, initialize_low): Update.
(the_netbsd_target): Remove.
* netbsd-low.h (netbsd_target_regsets, netbsd_target_ops)
(the_low_target, netbsd_tdesc): Remove.
(netbsd_process_target::get_regs_info)
(netbsd_process_target::low_arch_setup): Add.
|
|
When a WOW64 process triggers a breakpoint exception in 64bit code (which
happens when a 64bit gdb calls DebugBreakProcess for a 32bit target),
gdb ignores the breakpoint (because Wow64GetThreadContext can only report
the pc of 32bit code, and there is not int3 at this location).
But if these 64bit breakpoint exceptions are handled as SIGINT, gdb
doesn't check for int3, and always stops the target.
gdb/ChangeLog:
2020-09-23 Hannes Domani <ssbssa@yahoo.de>
* nat/windows-nat.c (handle_exception): Handle 64bit breakpoints
in WOW64 processes as SIGINT.
* nat/windows-nat.h: Make wow64_process a shared variable.
* windows-nat.c: Remove static wow64_process variable.
gdbserver/ChangeLog:
2020-09-23 Hannes Domani <ssbssa@yahoo.de>
* win32-low.cc: Remove local wow64_process variable.
* win32-low.h: Remove local wow64_process variable.
|
|
This changes TARGET_WNOHANG to be a member of an enum, rather than a
define, and also adds a DEF_ENUM_FLAGS_TYPE for this type. Then, it
changes target_wait and the various target wait methods to use this
type rather than "int".
This didn't catch any bugs, but it seems like a decent cleanup
nevertheless.
I did not change deprecated_target_wait_hook, since that's only used
out-of-tree (by Insight), and there didn't seem to be a need.
I can't build some of these targets, so I modified them on a
best-effort basis. I don't think this patch should go in before the
release branch is made.
gdb/ChangeLog
2020-09-18 Tom Tromey <tromey@adacore.com>
* windows-nat.c (struct windows_nat_target) <wait>: Update.
(windows_nat_target::wait): Update.
* target/wait.h (enum target_wait_flag): New. Use
DEF_ENUM_FLAGS_TYPE.
* target/target.h (target_wait): Change type of options.
* target.h (target_options_to_string, default_target_wait):
Update.
(struct target_ops) <wait>: Change type of options.
* target.c (target_wait, default_target_wait, do_option): Change
type of "options".
(target_options_to_string): Likewise.
* target-delegates.c: Rebuild.
* target-debug.h (target_debug_print_target_wait_flags): Rename
from target_debug_print_options.
* sol-thread.c (class sol_thread_target) <wait>: Update.
(sol_thread_target::wait): Update.
* rs6000-nat.c (class rs6000_nat_target) <wait>: Update.
(rs6000_nat_target::wait): Update.
* remote.c (class remote_target) <wait, wait_ns, wait_as>:
Update.
(remote_target::wait_ns, remote_target::wait_as): Change type of
"options".
(remote_target::wait): Update.
* remote-sim.c (struct gdbsim_target) <wait>: Update.
(gdbsim_target::wait): Update.
* record-full.c (class record_full_base_target) <wait>: Update.
(record_full_wait_1): Change type of "options".
(record_full_base_target::wait): Update.
* record-btrace.c (class record_btrace_target) <wait>: Update.
(record_btrace_target::wait): Update.
* ravenscar-thread.c (struct ravenscar_thread_target) <wait>:
Update.
(ravenscar_thread_target::wait): Update.
* procfs.c (class procfs_target) <wait>: Update.
(procfs_target::wait): Update.
* obsd-nat.h (class obsd_nat_target) <wait>: Update.
* obsd-nat.c (obsd_nat_target::wait): Update.
* nto-procfs.c (struct nto_procfs_target) <wait>: Update.
(nto_procfs_target::wait): Update.
* nbsd-nat.h (struct nbsd_nat_target) <wait>: Update.
* nbsd-nat.c (nbsd_wait): Change type of "options".
(nbsd_nat_target::wait): Update.
* linux-thread-db.c (class thread_db_target) <wait>: Update.
(thread_db_target::wait): Update.
* linux-nat.h (class linux_nat_target) <wait>: Update.
* linux-nat.c (linux_nat_target::wait): Update.
(linux_nat_wait_1): Update.
* infrun.c (do_target_wait_1, do_target_wait): Change type of
"options".
* inf-ptrace.h (struct inf_ptrace_target) <wait>: Update.
* inf-ptrace.c (inf_ptrace_target::wait): Update.
* go32-nat.c (struct go32_nat_target) <wait>: Update.
(go32_nat_target::wait): Update.
* gnu-nat.h (struct gnu_nat_target) <wait>: Update.
* gnu-nat.c (gnu_nat_target::wait): Update.
* fbsd-nat.h (class fbsd_nat_target) <wait>: Update.
* fbsd-nat.c (fbsd_nat_target::wait): Update.
* darwin-nat.h (class darwin_nat_target) <wait>: Update.
* darwin-nat.c (darwin_nat_target::wait): Update.
* bsd-uthread.c (struct bsd_uthread_target) <wait>: Update.
(bsd_uthread_target::wait): Update.
* aix-thread.c (class aix_thread_target) <wait>: Update.
(aix_thread_target::wait): Update.
gdbserver/ChangeLog
2020-09-18 Tom Tromey <tromey@adacore.com>
* netbsd-low.h (class netbsd_process_target) <wait>: Update.
* netbsd-low.cc (netbsd_waitpid, netbsd_wait)
(netbsd_process_target::wait): Change type of target_options.
* win32-low.h (class win32_process_target) <wait>: Update.
* win32-low.cc (win32_process_target::wait): Update.
* target.h (class process_stratum_target) <wait>: Update.
(mywait): Update.
* target.cc (mywait, target_wait): Change type of "options".
* linux-low.h (class linux_process_target) <wait, wait_1>:
Update.
* linux-low.cc (linux_process_target::wait)
(linux_process_target::wait_1): Update.
|
|
My understanding is that it's mildly better to use a static const
array, as opposed to a "const char *", for a global string constant,
when possible. This makes sense to me because the pointer requires a
load from an address, whereas the array is just the address.
So, I searched for these in gdb and gdbserver. This patch fixes the
ones I found.
gdb/ChangeLog
2020-09-15 Tom Tromey <tromey@adacore.com>
* unittests/memory-map-selftests.c (valid_mem_map): Now array.
* ui-style.c (ansi_regex_text): Now array.
* rust-exp.y (number_regex_text): Now array.
* linespec.c (linespec_quote_characters): Now array.
* jit.c (jit_break_name, jit_descriptor_name, reader_init_fn_sym):
Now arrays.
gdbserver/ChangeLog
2020-09-15 Tom Tromey <tromey@adacore.com>
* linux-x86-low.cc (xmltarget_i386_linux_no_xml)
(xmltarget_amd64_linux_no_xml): Now arrays.
|
|
Many global arrays in gdb could be marked "const" but are not. This
patch changes some of them. (There may be other arrays that could
benefit from this treatment. I only examined arrays of strings.)
This lets the linker move some symbols to the readonly data section.
For example, previously:
0000000000000000 d _ZL18can_use_agent_enum
is now:
0000000000000030 r _ZL18can_use_agent_enum
2020-09-14 Tom Tromey <tromey@adacore.com>
* x86-tdep.h (x86_in_indirect_branch_thunk): Update.
* x86-tdep.c (x86_is_thunk_register_name)
(x86_in_indirect_branch_thunk): Update.
* sparc64-tdep.c (sparc64_fpu_register_names)
(sparc64_cp0_register_names, sparc64_register_names)
(sparc64_pseudo_register_names): Now const.
* sparc-tdep.h (struct gdbarch_tdep) <fpu_register_names,
cp0_registers_num>: Now const.
* sparc-tdep.c (sparc_core_register_names)
(sparc32_fpu_register_names, sparc32_cp0_register_names)
(sparc32_pseudo_register_names): Now const.
(validate_tdesc_registers): Update.
* rust-lang.c (rust_extensions): Now const.
* p-lang.c (p_extensions): Now const.
* objc-lang.c (objc_extensions): Now const.
* nto-tdep.c (nto_thread_state_str): Now const.
* moxie-tdep.c (moxie_register_names): Now const.
* mips-tdep.h (struct gdbarch_tdep) <mips_processor_reg_names>:
Now const.
* mips-tdep.c (mips_generic_reg_names, mips_tx39_reg_names)
(mips_linux_reg_names): Now const.
(mips_gdbarch_init): Update.
* microblaze-tdep.c (microblaze_register_names): Now const.
* m68k-tdep.c (m68k_register_names): Now const.
* m32r-tdep.c (m32r_register_names): Now const.
* ia64-tdep.c (ia64_register_names): Now const.
* i386-tdep.h (struct gdbarch_tdep) <register_names,
ymmh_register_names, ymm16h_regnum, mpx_register_names,
k_register_names, zmmh_register_names, xmm_avx512_register_names,
ymm_avx512_register_names, pkeys_register_names>: Now const.
* i386-tdep.c (i386_register_names, i386_zmm_names)
(i386_zmmh_names, i386_k_names, i386_ymm_names, i386_ymmh_names)
(i386_mpx_names, i386_pkeys_names, i386_bnd_names)
(i386_mmx_names, i386_byte_names, i386_word_names): Now const.
* f-lang.c (f_extensions): Now const.
* d-lang.c (d_extensions): Now const.
* csky-tdep.c (csky_register_names): Now const.
* charset.c (default_charset_names, charset_enum): Now const.
(_initialize_charset): Update.
* c-lang.c (c_extensions, cplus_extensions, asm_extensions): Now
const.
* bsd-uthread.c (bsd_uthread_solib_names): Now const.
(bsd_uthread_solib_loaded): Update.
(bsd_uthread_state): Now const.
* amd64-tdep.c (amd64_register_names, amd64_ymm_names)
(amd64_ymm_avx512_names, amd64_ymmh_names)
(amd64_ymmh_avx512_names, amd64_mpx_names, amd64_k_names)
(amd64_zmmh_names, amd64_zmm_names, amd64_xmm_avx512_names)
(amd64_pkeys_names, amd64_byte_names, amd64_word_names)
(amd64_dword_names): Now const.
* agent.c (can_use_agent_enum): Now const.
* ada-tasks.c (task_states, long_task_states): Now const.
* ada-lang.c (known_runtime_file_name_patterns)
(known_auxiliary_function_name_patterns, attribute_names)
(standard_exc, ada_extensions): Now const.
gdbserver/ChangeLog
2020-09-14 Tom Tromey <tromey@adacore.com>
* tracepoint.cc (eval_result_names): Now const.
* ax.cc (gdb_agent_op_names): Now const.
|
|
Implement the following functionality: create_inferior,
post_create_inferior, attach, kill, detach, mourn, join, thread_alive,
resume, wait, fetch_registers, store_registers, read_memory, write_memory,
request_interrupt, supports_read_auxv, read_auxv,
supports_hardware_single_step, sw_breakpoint_from_kind,
supports_z_point_type, insert_point, remove_point,
stopped_by_sw_breakpoint, supports_qxfer_siginfo, qxfer_siginfo,
supports_stopped_by_sw_breakpoint, supports_non_stop,
supports_multi_process, supports_fork_events, supports_vfork_events,
supports_exec_events, supports_disable_randomization,
supports_qxfer_libraries_svr4, qxfer_libraries_svr4,
supports_pid_to_exec_file, pid_to_exec_file, thread_name,
supports_catch_syscall.
The only CPU architecture supported: x86_64.
Implement only support for hardware assisted single step and
software breakpoint.
Implement support only for regular X86 registers, thus no FPU.
gdbserver/ChangeLog:
* netbsd-low.cc: Add.
* netbsd-low.h: Likewise.
* netbsd-amd64-low.cc: Likewise.
* Makefile.in (SFILES): Register "netbsd-low.cc", "netbsd-low.h",
"netbsd-amd64-low.cc".
* configure.srv: Add x86_64-*-netbsd*.
|
|
I found myself wanting to run a few specific selftests while developing.
I thought it would be nice to be able to provide multiple test names
when running `maintenant selftests`. The arguments to that command is
currently interpreted as a single filter (not split by spaces), it now
becomes a list a filters, split by spaces. A test is executed when it
matches at least one filter.
Here's an example of the result in GDB:
(gdb) maintenance selftest xml
Running selftest xml_escape_text.
Running selftest xml_escape_text_append.
Ran 2 unit tests, 0 failed
(gdb) maintenance selftest xml unord
Running selftest unordered_remove.
Running selftest xml_escape_text.
Running selftest xml_escape_text_append.
Ran 3 unit tests, 0 failed
(gdb) maintenance selftest xml unord foobar
Running selftest unordered_remove.
Running selftest xml_escape_text.
Running selftest xml_escape_text_append.
Ran 3 unit tests, 0 failed
Since the selftest machinery is also shared with gdbserver, I also
adapted gdbserver. It accepts a `--selftest` switch, which accepts an
optional filter argument. I made it so you can now pass `--selftest`
multiple time to add filters.
It's not so useful right now though: there's only a single selftest
right now in GDB and it's for an architecture I can't compile. So I
tested by adding dummy tests, here's an example of the result:
$ ./gdbserver --selftest=foo
Running selftest foo.
foo
Running selftest foobar.
foobar
Ran 2 unit tests, 0 failed
$ ./gdbserver --selftest=foo --selftest=bar
Running selftest bar.
bar
Running selftest foo.
foo
Running selftest foobar.
foobar
Ran 3 unit tests, 0 failed
gdbsupport/ChangeLog:
* selftest.h (run_tests): Change parameter to array_view.
* selftest.c (run_tests): Change parameter to array_view and use
it.
gdb/ChangeLog:
* maint.c (maintenance_selftest): Split args and pass array_view
to run_tests.
gdbserver/ChangeLog:
* server.cc (captured_main): Accept multiple `--selftest=`
options. Pass all `--selftest=` arguments to run_tests.
Change-Id: I422bd49f08ea8095ae174c5d66a2dd502a59613a
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GDB currently doesn't build on 32-bit Solaris:
* On Solaris 11.4/x86:
In file included from /usr/include/sys/procfs.h:26,
from /vol/src/gnu/gdb/hg/master/dist/gdb/i386-sol2-nat.c:24:
/usr/include/sys/old_procfs.h:31:2: error: #error "Cannot use procfs in the large file compilation environment"
#error "Cannot use procfs in the large file compilation environment"
^~~~~
* On Solaris 11.3/x86 there are several more instances of this.
The interaction between procfs and large-file support historically has
been a royal mess on Solaris:
* There are two versions of the procfs interface:
** The old ioctl-based /proc, deprecated and not used any longer in
either gdb or binutils.
** The `new' (introduced in Solaris 2.6, 1997) structured /proc.
* There are two headers one can possibly include:
** <procfs.h> which only provides the structured /proc, definining
_STRUCTURED_PROC=1 and then including ...
** <sys/procfs.h> which defaults to _STRUCTURED_PROC=0, the ioctl-based
/proc, but provides structured /proc if _STRUCTURED_PROC == 1.
* procfs and the large-file environment didn't go well together:
** Until Solaris 11.3, <sys/procfs.h> would always #error in 32-bit
compilations when the large-file environment was active
(_FILE_OFFSET_BITS == 64).
** In both Solaris 11.4 and Illumos, this restriction was lifted for
structured /proc.
So one has to be careful always to define _STRUCTURED_PROC=1 when
testing for or using <sys/procfs.h> on Solaris. As the errors above
show, this isn't always the case in binutils-gdb right now.
Also one may need to disable large-file support for 32-bit compilations
on Solaris. config/largefile.m4 meant to do this by wrapping the
AC_SYS_LARGEFILE autoconf macro with appropriate checks, yielding
ACX_LARGEFILE. Unfortunately the macro doesn't always succeed because
it neglects the _STRUCTURED_PROC part.
To make things even worse, since GCC 9 g++ predefines
_FILE_OFFSET_BITS=64 on Solaris. So even if largefile.m4 deciced not to
enable large-file support, this has no effect, breaking the gdb build.
This patch addresses all this as follows:
* All tests for the <sys/procfs.h> header are made with
_STRUCTURED_PROC=1, the definition going into the various config.h
files instead of having to make them (and sometimes failing) in the
affected sources.
* To cope with the g++ predefine of _FILE_OFFSET_BITS=64,
-U_FILE_OFFSET_BITS is added to various *_CPPFLAGS variables. It had
been far easier to have just
#undef _FILE_OFFSET_BITS
in config.h, but unfortunately such a construct in config.in is
commented by config.status irrespective of indentation and whitespace
if large-file support is disabled. I found no way around this and
putting the #undef in several global headers for bfd, binutils, ld,
and gdb seemed way more invasive.
* Last, the applicability check in largefile.m4 was modified only to
disable largefile support if really needed. To do so, it checks if
<sys/procfs.h> compiles with _FILE_OFFSET_BITS=64 defined. If it
doesn't, the disabling only happens if gdb exists in-tree and isn't
disabled, otherwise (building binutils from a tarball), there's no
conflict.
What initially confused me was the check for $plugins here, which
originally caused the disabling not to take place. Since AC_PLUGINGS
does enable plugin support if <dlfcn.h> exists (which it does on
Solaris), the disabling never happened.
I could find no explanation why the linker plugin needs large-file
support but thought it would be enough if gld and GCC's lto-plugin
agreed on the _FILE_OFFSET_BITS value. Unfortunately, that's not
enough: lto-plugin uses the simple-object interface from libiberty,
which includes off_t arguments. So to fully disable large-file
support would mean also disabling it in libiberty and its users: gcc
and libstdc++-v3. This seems highly undesirable, so I decided to
disable the linker plugin instead if large-file support won't work.
The patch allows binutils+gdb to build on i386-pc-solaris2.11 (both
Solaris 11.3 and 11.4, using GCC 9.3.0 which is the worst case due to
predefined _FILE_OFFSET_BITS=64). Also regtested on
amd64-pc-solaris2.11 (again on Solaris 11.3 and 11.4),
x86_64-pc-linux-gnu and i686-pc-linux-gnu.
config:
* largefile.m4 (ACX_LARGEFILE) <sparc-*-solaris*|i?86-*-solaris*>:
Check for <sys/procfs.h> incompatilibity with large-file support
on Solaris.
Only disable large-file support and perhaps plugins if needed.
Set, substitute LARGEFILE_CPPFLAGS if so.
bfd:
* bfd.m4 (BFD_SYS_PROCFS_H): New macro.
(BFD_HAVE_SYS_PROCFS_TYPE): Require BFD_SYS_PROCFS_H.
Don't define _STRUCTURED_PROC.
(BFD_HAVE_SYS_PROCFS_TYPE_MEMBER): Likewise.
* elf.c [HAVE_SYS_PROCFS_H] (_STRUCTURED_PROC): Don't define.
* configure.ac: Use BFD_SYS_PROCFS_H to check for <sys/procfs.h>.
* configure, config.in: Regenerate.
* Makefile.am (AM_CPPFLAGS): Add LARGEFILE_CPPFLAGS.
* Makefile.in, doc/Makefile.in: Regenerate.
binutils:
* Makefile.am (AM_CPPFLAGS): Add LARGEFILE_CPPFLAGS.
* Makefile.in, doc/Makefile.in: Regenerate.
* configure: Regenerate.
gas:
* Makefile.am (AM_CPPFLAGS): Add LARGEFILE_CPPFLAGS.
* Makefile.in, doc/Makefile.in: Regenerate.
* configure: Regenerate.
gdb:
* proc-api.c (_STRUCTURED_PROC): Don't define.
* proc-events.c: Likewise.
* proc-flags.c: Likewise.
* proc-why.c: Likewise.
* procfs.c: Likewise.
* Makefile.in (INTERNAL_CPPFLAGS): Add LARGEFILE_CPPFLAGS.
* configure, config.in: Regenerate.
gdbserver:
* configure, config.in: Regenerate.
gdbsupport:
* Makefile.am (AM_CPPFLAGS): Add LARGEFILE_CPPFLAGS.
* common.m4 (GDB_AC_COMMON): Use BFD_SYS_PROCFS_H to check for
<sys/procfs.h>.
* Makefile.in: Regenerate.
* configure, config.in: Regenerate.
gnulib:
* configure.ac: Run ACX_LARGEFILE before gl_EARLY.
* configure: Regenerate.
gprof:
* Makefile.am (AM_CPPFLAGS): Add LARGEFILE_CPPFLAGS.
* Makefile.in: Regenerate.
* configure: Regenerate.
ld:
* Makefile.am (AM_CPPFLAGS): Add LARGEFILE_CPPFLAGS.
* Makefile.in: Regenerate.
* configure: Regenerate.
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The original configure-time tests in gdb/ and gdbserver/ failed to
detect that 'socklen_t' is defined in MinGW headers because the test
program included only sys/socket.h, which is absent in MinGW system
headers. However on MS-Windows this data type is declared in another
header, ws2tcpip.h. The modified test programs try using ws2tcpip.h
if sys/socket.h is unavailable.
Thanks to Joel Brobecker who helped me regenerate the configure
scripts and the config.in files.
gdb/ChangeLog:
2020-07-26 Eli Zaretskii <eliz@gnu.org>
* configure.ac (AC_CHECK_HEADERS): Check for sys/socket.h and
ws2tcpip.h. When checking whether socklen_t type is defined, use
ws2tcpip.h if it is available and sys/socket.h isn't.
* configure: Regenerate.
* config.in: Regenerate.
gdbserver/ChangeLog:
2020-07-26 Eli Zaretskii <eliz@gnu.org>
* configure.ac (AC_CHECK_HEADERS): Add ws2tcpip.h.
When checking whether socklen_t type is defined, use ws2tcpip.h if
it is available and sys/socket.h isn't.
* configure: Regenerate.
* config.in: Regenerate.
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On some systems, the gdb.multi/multi-target.exp testcase occasionally
fails like so:
Running src/gdb/testsuite/gdb.multi/multi-target.exp ...
FAIL: gdb.multi/multi-target.exp: info-inferiors: multi_process=on: inferior 1: info connections
FAIL: gdb.multi/multi-target.exp: info-inferiors: multi_process=on: inferior 1: info inferiors
FAIL: gdb.multi/multi-target.exp: info-inferiors: multi_process=on: inferior 2: info connections
FAIL: gdb.multi/multi-target.exp: info-inferiors: multi_process=on: inferior 2: info inferiors
FAIL: gdb.multi/multi-target.exp: info-inferiors: multi_process=on: inferior 3: inferior 3
... many more cascading fails.
The problem starts when the testcase runs an inferior against GDBserver:
(gdb) run
Starting program: build/gdb/testsuite/outputs/gdb.multi/multi-target/multi-target
Reading /lib64/ld-linux-x86-64.so.2 from remote target...
warning: File transfers from remote targets can be slow. Use "set sysroot" to access files locally instead.
Reading /lib64/ld-linux-x86-64.so.2 from remote target...
Reading /lib64/ld-2.31.so from remote target...
Reading /lib64/.debug/ld-2.31.so from remote target...
Reading /usr/lib/debug//lib64/ld-2.31.so from remote target...
Reading /usr/lib/debug/lib64//ld-2.31.so from remote target...
Reading target:/usr/lib/debug/lib64//ld-2.31.so from remote target...
Reading /lib/x86_64-linux-gnu/libpthread.so.0 from remote target...
Reading /lib/x86_64-linux-gnu/libc.so.6 from remote target...
Reading /lib/x86_64-linux-gnu/libc-2.31.so from remote target...
Reading /lib/x86_64-linux-gnu/.debug/libc-2.31.so from remote target...
Reading /usr/lib/debug//lib/x86_64-linux-gnu/libc-2.31.so from remote target...
Reading /usr/lib/debug//lib/x86_64-linux-gnu/libc-2.31.so from remote target...
Remote connection closed
...
Note the "Remote connection closed" message. That means GDBserver
exited abruptly.
I traced it down to the fact that GDB fetches the thread list from
GDBserver while the main thread of the process is still running. On
my main system where I wrote the testcase, I have not observed the
failure because it is slow enough that the thread stops before
GDBserver fetches the thread list in the problem scenario which I'll
describe below.
With some --remote-debug logging from GDBserver side, we see the last
packets before the connection closes:
...
getpkt ("vCont;c"); [no ack sent]
putpkt ("$OK#9a"); [noack mode]
getpkt ("Tp10f9a.10f9a"); [no ack sent]
putpkt ("$OK#9a"); [noack mode]
getpkt ("Hgp0.0"); [no ack sent]
putpkt ("$OK#9a"); [noack mode]
getpkt ("qXfer:threads:read::0,1000"); [no ack sent]
Note the vCont;c , which sets the program running, and then a
qXfer:threads:read packet at the end.
The problem happens when the thread list refresh (qXfer:threads:read)
is sent just while the main thread is running and it still hasn't
initialized its libpthread id internally. In that state, the main
thread's lwp will remain with the thread_known flag clear. See in
find_one_thread:
/* If the new thread ID is zero, a final thread ID will be available
later. Do not enable thread debugging yet. */
if (ti.ti_tid == 0)
return 0;
Now, back in server.cc, to handle the qXfer:threads:read, we reach
handle_qxfer_threads -> handle_qxfer_threads_proper, and the latter
then calls handle_qxfer_threads_worker for each known thread. In
handle_qxfer_threads_worker, we call target_thread_handle. This ends
up in thread_db_thread_handle, here:
if (!lwp->thread_known && !find_one_thread (thread->id))
return false;
Since the thread ID isn't known yet, we call find_one_thread. This
calls into libthread_db.so, which accesses memory. Because the
current thread is running, that fails and we throw an error, here:
/* Get information about this thread. */
err = thread_db->td_ta_map_lwp2thr_p (thread_db->thread_agent, lwpid, &th);
if (err != TD_OK)
error ("Cannot get thread handle for LWP %d: %s",
lwpid, thread_db_err_str (err));
The current design is that whenever GDB-facing packets/requests need
to accesses memory, server.cc is supposed to prepare the target for
the access. See gdb_read_memory / gdb_write_memory. This preparation
means pausing threads if in non-stop mode (someday we could lift this
requirement, but we will still need to pause to access registers or do
other related ptrace accesses like PTRACE_GET_THREAD_AREA). Note that
the multi-target.exp testcase forces "maint set target-non-stop on".
So the fix here is to prepare the target to access memory when
handling qXfer:threads:read too.
gdbserver/ChangeLog:
* inferiors.cc (switch_to_process): New, moved here from
thread-db.cc, and made extern.
* inferiors.h (switch_to_process): Declare.
* server.cc: Include "gdbsupport/scoped_restore.h".
(handle_qxfer_threads_proper): Now returns bool. Prepare to
access memory around target calls.
(handle_qxfer_threads): Handle errors.
* thread-db.cc (switch_to_process): Moved to inferiors.cc.
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I noticed that my IDE was confusing the two stopped_pids variables.
There is one in GDB and one in GDBserver. They should be static, make
them so.
gdb/ChangeLog:
* linux-nat.c (stopped_pids): Make static.
gdbserver/ChangeLog:
* linux-low.cc (stopped_pids): Make static.
Change-Id: If4a2bdcd45d32eb3a732d266a0f686a4e4c23672
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