Currently every fixup in the current segment is checked when relaxing
trampoline frag. This is very expensive. Make a searchable array of
fixups pointing at potentially oversized jumps at the beginning of every
relaxation pass and only check subset of this cache in the reach of
single jump from the trampoline frag currently being relaxed.
Original profile:
% time self children called name
-----------------------------------------
370.16 593.38 12283048/12283048 relax_segment
98.4 370.16 593.38 12283048 xtensa_relax_frag
58.91 269.26 2691463834/2699602236 xtensa_insnbuf_from_chars
68.35 68.17 811266668/813338977 S_GET_VALUE
36.85 29.51 2684369246/2685538060 xtensa_opcode_decode
28.34 8.84 2684369246/2685538060 xtensa_format_get_slot
12.39 5.94 2691463834/2699775044 xtensa_format_decode
0.03 4.60 4101109/4101109 relax_frag_for_align
0.18 1.76 994617/994617 relax_frag_immed
0.07 0.09 24556277/24851220 new_logical_line
0.06 0.00 12283048/14067410 as_where
0.04 0.00 7094588/15460506 xtensa_format_num_slots
0.00 0.00 1/712477 xtensa_insnbuf_alloc
-----------------------------------------
Same data, after optimization:
% time self children called name
-----------------------------------------
0.51 7.47 12283048/12283048 relax_segment
58.0 0.51 7.47 12283048 xtensa_relax_frag
0.02 4.08 4101109/4101109 relax_frag_for_align
0.18 1.39 994617/994617 relax_frag_immed
0.01 0.98 555/555 xtensa_cache_relaxable_fixups
0.21 0.25 7094588/16693271 xtensa_insnbuf_from_chars
0.06 0.12 24556277/24851220 new_logical_line
0.06 0.00 7094588/15460506 xtensa_format_num_slots
0.02 0.04 7094588/16866079 xtensa_format_decode
0.05 0.00 12283048/14067410 as_where
0.00 0.00 1/712477 xtensa_insnbuf_alloc
0.00 0.00 93808/93808 xtensa_find_first_cached_fixup
-----------------------------------------
2015-05-02 Max Filippov <jcmvbkbc@gmail.com>
gas/
* config/tc-xtensa.c (cached_fixupS, fixup_cacheS): New typedefs.
(struct cached_fixup, struct fixup_cache): New structures.
(fixup_order, xtensa_make_cached_fixup),
(xtensa_realloc_fixup_cache, xtensa_cache_relaxable_fixups),
(xtensa_find_first_cached_fixup, xtensa_delete_cached_fixup),
(xtensa_add_cached_fixup): New functions.
(xtensa_relax_frag): Cache fixups pointing at potentially
oversized jumps at the beginning of every relaxation pass. Only
check subset of this cache in the reach of single jump from the
trampoline frag currently being relaxed.
Merge with gcc:
2014-11-11 Anthony Brandon <anthony.brandon@gmail.com>
Manuel López-Ibáñez <manu@gcc.gnu.org>
PR driver/36312
* filenames.h: Add prototype for canonical_filename_eq.
When bfd is configured as a shared library, we need to configure zlib
with --enable-host-shared since zlib is used by bfd.
PR ld/18355
* Makefile.def: Add extra_configure_flags to host zlib.
* configure.ac (extra_host_zlib_configure_flags): New. Set
to --enable-host-shared When bfd is to be built as shared
library. AC_SUBST.
* Makefile.in: Regenerated.
* configure: Likewise.
This x86 assembler patch:
https://sourceware.org/ml/binutils/2001-11/msg00344.html
generates a .note section for .arch directive so that GDB can tell which
architecture an i386 binary belongs:
https://sourceware.org/ml/binutils/2001-11/msg00271.html
However, x86 assembly code can have any instructions. A .note section
doesn't help. This patch removes it.
gas/
* config/tc-i386.c (i386_elf_emit_arch_note): Removed.
* config/tc-i386.h (md_end): Likewise.
(i386_elf_emit_arch_note): Likewise.
gas/testsuite/
* gas/i386/i386.exp: Run note.
* gas/i386/note.d: New file.
* gas/i386/note.s: Likewise.
PR gas/18347
gas * config/tc-arm.c (md_undefined_symbol): Issue a warning message
(if enabled) when the user creates a symbol with the same name as
an ARM instruction.
(flag_warn_syms): New static variable.
(arm_opts): Add mwarn-syms and mno-warn-syms.
* doc/c-arm.texi (ARM Options): Document the -m[no-]warn-syms
options.
tests * gas/arm/pr18347.s: New file: Test case.
* gas/arm/pr18347.l: New file: Expected assembler output.
* gas/arm/pr18347.d: New file: Test driver.
Hi,
I see this fails below on arm linux native testing and remote testing
with "set remote hardware-watchpoint-limit 1",
rwatch global^M
There are not enough available hardware resources for this watchpoint.^M
(gdb) FAIL: gdb.base/break-idempotent.exp: always-inserted off: rwatch: twice: rwatch global
gdb.base/break-idempotent.exp sets two breakpoints/watchpoints on the
same address. GDB isn't smart enough calculate these two HW
watchpoints can fit in one HW debug register, so the error message
above isn't necessary (there is one HW watchpoint register on arm).
Because target_ops interface can_use_hardware_watchpoint doesn't
pass enough information to the target backend.
Note that if I don't "set remote hardware-watchpoint-limit 1" in
remote testing, this test passes without fails. However without
"set remote hardware-watchpoint-limit 1", many other watchpoint
tests fail.
This patch is to add a check to skip_hw_watchpoint_multi_tests
for rwatch and awatch. We can add such check for watch as well,
but GDB is able to switch to software watchpoint if HW resource
isn't available, it doesn't cause any fail, I decide not to skip.
gdb/testsuite:
2015-04-30 Yao Qi <yao.qi@linaro.org>
* gdb.base/break-idempotent.exp: If
skip_hw_watchpoint_multi_tests returns true, skip the tests
on "rwatch" and "awatch".
Hi,
I see the fail in gdb.base/relativedebug.exp on aarch64 box on which
glibc doesn't have debug info,
bt^M
#0 0x0000002000061a88 in raise () from /lib/aarch64-linux-gnu/libc.so.6^M
#1 0x0000002000064efc in abort () from /lib/aarch64-linux-gnu/libc.so.6^M
#2 0x0000000000400640 in handler (signo=14) at ../../../binutils-gdb/gdb/testsuite/gdb.base/relativedebug.c:25^M
#3 <signal handler called>^M
#4 0x00000020000cc478 in ?? () from /lib/aarch64-linux-gnu/libc.so.6^M
#5 0x0000000000400664 in main () at ../../../binutils-gdb/gdb/testsuite/gdb.base/relativedebug.c:32^M
(gdb) FAIL: gdb.base/relativedebug.exp: pause found in backtrace
if glibc has debug info, this test doesn't fail.
In sysdeps/unix/sysv/linux/generic/pause.c, __libc_pause calls
__syscall_pause,
static int
__syscall_pause (void)
{
sigset_t set;
int rc =
INLINE_SYSCALL (rt_sigprocmask, 4, SIG_BLOCK, NULL, &set, _NSIG / 8);
if (rc == 0)
rc = INLINE_SYSCALL (rt_sigsuspend, 2, &set, _NSIG / 8);
return rc;
}
int
__libc_pause (void)
{
if (SINGLE_THREAD_P)
return __syscall_pause (); <--- tail call
int oldtype = LIBC_CANCEL_ASYNC ();
int result = __syscall_pause ();
LIBC_CANCEL_RESET (oldtype);
return result;
}
and GDB unwinder is confused by the GCC optimized code,
(gdb) disassemble pause
Dump of assembler code for function pause:
0x0000007fb7f274c4 <+0>: stp x29, x30, [sp,#-32]!
0x0000007fb7f274c8 <+4>: mov x29, sp
0x0000007fb7f274cc <+8>: adrp x0, 0x7fb7fd2000
0x0000007fb7f274d0 <+12>: ldr w0, [x0,#364]
0x0000007fb7f274d4 <+16>: stp x19, x20, [sp,#16]
0x0000007fb7f274d8 <+20>: cbnz w0, 0x7fb7f274e8 <pause+36>
0x0000007fb7f274dc <+24>: ldp x19, x20, [sp,#16]
0x0000007fb7f274e0 <+28>: ldp x29, x30, [sp],#32
0x0000007fb7f274e4 <+32>: b 0x7fb7f27434 <---- __syscall_pause
0x0000007fb7f274e8 <+36>: bl 0x7fb7f5e080
Note that the program stops in __syscall_pause, but its symbol is
stripped in glibc, so GDB doesn't know where the program stops.
__syscall_pause is a tail call in __libc_pause, so it returns to main
instead of __libc_pause. As a result, the backtrace is like,
#0 0x0000007fb7ebca88 in raise () from /lib/aarch64-linux-gnu/libc.so.6
#1 0x0000007fb7ebfefc in abort () from /lib/aarch64-linux-gnu/libc.so.6
#2 0x0000000000400640 in handler (signo=14) at ../../../binutils-gdb/gdb/testsuite/gdb.base/relativedebug.c:25
#3 <signal handler called>
#4 0x0000007fb7f27478 in ?? () from /lib/aarch64-linux-gnu/libc.so.6 <-- [in __syscall_pause]
#5 0x0000000000400664 in main () at ../../../binutils-gdb/gdb/testsuite/gdb.base/relativedebug.c:32
looks GDB does nothing wrong here. I looked back at the test case
gdb.base/relativedebug.exp, which was added
https://sourceware.org/ml/gdb-patches/2006-10/msg00305.html
This test was indented to test the problem that "backtraces no longer
display some libc functions" after separate debug info is installed.
IOW, it makes few sense to test against libc which doesn't have debug
info at all, such as my case.
This patch is to tweak the test case to catch the output of
"info shared", if "(*)" is found for libc.so, which means libc doesn't
have debug info, then skip the test.
gdb/testsuite:
2015-04-30 Yao Qi <yao.qi@linaro.org>
* gdb.base/relativedebug.exp: Invoke gdb command
"info sharedlibrary", and if libc.so doesn't have debug info,
skip the test.
gas PR 18256
* config/tc-arm.c (encode_arm_cp_address): Issue an error message
if the operand is neither a register nor a vector.
tests * gas/arm/pr18256.s: New file: Test case.
* gas/arm/pr18256.l: New file: Expected assembler output.
* gas/arm/pr18256.d: New file: Test driver.
Link the last zlibnormal gnunormal and gabinormal against libfoozlib.so
so that their only differences are DWARF debug sections.
PR ld/18354
* ld-elf/compress.exp (run_tests): Link the last zlibnormal,
gnunormal and gabinormal against libfoozlib.so.
There are targets GDB thinks support hardware watchpoints, but in reality they
don't. Though it may seem that hardware watchpoint creation was successful,
the actual insertion of such watchpoint will fail when GDB moves the inferior.
(gdb) watch -location q.a^M
Hardware watchpoint 2: -location q.a^M
(gdb) PASS: gdb.base/watch-bitfields.exp: -location watch against bitfields: watch -location q.a
watch -location q.e^M
Hardware watchpoint 3: -location q.e^M
(gdb) PASS: gdb.base/watch-bitfields.exp: -location watch against bitfields: watch -location q.e
print q.a^M
$1 = 0^M
(gdb) PASS: gdb.base/watch-bitfields.exp: -location watch against bitfields: q.a: 0->1: print expression before
continue^M
Continuing.^M
Warning:^M
Could not insert hardware watchpoint 2.^M
Could not insert hardware watchpoint 3.^M
Could not insert hardware breakpoints:^M
You may have requested too many hardware breakpoints/watchpoints.^M
^M
(gdb) FAIL: gdb.base/watch-bitfields.exp: -location watch against bitfields: q.a: 0->1: continue
This leads to a number of FAILs:
FAIL: gdb.base/watch-bitfields.exp: -location watch against bitfields: q.a: 0->1: continue
FAIL: gdb.base/watch-bitfields.exp: -location watch against bitfields: q.a: 0->1: print expression after
FAIL: gdb.base/watch-bitfields.exp: -location watch against bitfields: q.e: 0->5: continue
FAIL: gdb.base/watch-bitfields.exp: -location watch against bitfields: q.e: 0->5: print expression after
FAIL: gdb.base/watch-bitfields.exp: -location watch against bitfields: q.a: 1->0: print expression before
FAIL: gdb.base/watch-bitfields.exp: -location watch against bitfields: q.a: 1->0: continue
FAIL: gdb.base/watch-bitfields.exp: -location watch against bitfields: q.e: 5->4: print expression before
FAIL: gdb.base/watch-bitfields.exp: -location watch against bitfields: q.e: 5->4: continue
FAIL: gdb.base/watch-bitfields.exp: -location watch against bitfields: q.e: 5->4: print expression after
FAIL: gdb.base/watch-bitfields.exp: -location watch against bitfields: continue until exit
FAIL: gdb.base/watch-bitfields.exp: regular watch against bitfields: q.d + q.f + q.g: 0->4: continue
FAIL: gdb.base/watch-bitfields.exp: regular watch against bitfields: q.d + q.f + q.g: 0->4: print expression after
FAIL: gdb.base/watch-bitfields.exp: regular watch against bitfields: q.d + q.f + q.g: 4->10: print expression before
FAIL: gdb.base/watch-bitfields.exp: regular watch against bitfields: q.d + q.f + q.g: 4->10: continue
FAIL: gdb.base/watch-bitfields.exp: regular watch against bitfields: q.d + q.f + q.g: 4->10: print expression after
FAIL: gdb.base/watch-bitfields.exp: regular watch against bitfields: q.d + q.f + q.g: 10->3: print expression before
FAIL: gdb.base/watch-bitfields.exp: regular watch against bitfields: q.d + q.f + q.g: 10->3: continue
FAIL: gdb.base/watch-bitfields.exp: regular watch against bitfields: q.d + q.f + q.g: 10->3: print expression after
FAIL: gdb.base/watch-bitfields.exp: regular watch against bitfields: q.d + q.f + q.g: 3->2: print expression before
FAIL: gdb.base/watch-bitfields.exp: regular watch against bitfields: q.d + q.f + q.g: 3->2: continue
FAIL: gdb.base/watch-bitfields.exp: regular watch against bitfields: q.d + q.f + q.g: 3->2: print expression after
FAIL: gdb.base/watch-bitfields.exp: regular watch against bitfields: q.d + q.f + q.g: 2->1: print expression before
FAIL: gdb.base/watch-bitfields.exp: regular watch against bitfields: q.d + q.f + q.g: 2->1: continue
FAIL: gdb.base/watch-bitfields.exp: regular watch against bitfields: q.d + q.f + q.g: 2->1: print expression after
FAIL: gdb.base/watch-bitfields.exp: regular watch against bitfields: q.d + q.f + q.g: 1->0: print expression before
FAIL: gdb.base/watch-bitfields.exp: regular watch against bitfields: q.d + q.f + q.g: 1->0: continue
FAIL: gdb.base/watch-bitfields.exp: regular watch against bitfields: continue until exit
We can avoid these errors/FAILs by checking the board data and switching to
software watchpoints if the board does not support hardware watchpoints.
gdb/testsuite/ChangeLog:
2015-04-29 Luis Machado <lgustavo@codesourcery.com>
* gdb.base/watch-bitfields.exp: Switch to software watchpoints if
the target does not support hardware watchpoints.
This is another case of the testcase not handling memory write errors that
happen on some targets (QEMU) when GDB attempts to modify an address that
should contain a breakpoint, for example.
The following patch handles this and prevents spurious failures from
happening. It also adds a foreach loop to avoid duplication of code
and hardcoded patterns.
gdb/testsuite/ChangeLog:
2015-04-29 Luis Machado <lgustavo@codesourcery.com>
* gdb.base/break-always.exp: Abort testing if writing to memory
causes an error.
This commit allows NULL to be passed as the int *fd argument
to exec_file_find and solib_find to simplify use cases where
the caller does not require the file to be opened.
gdb/ChangeLog:
* solib.c (solib_find_1): Allow fd argument to be NULL.
(exec_file_find): Update comment.
(solib_find): Likewise.
* exec.c (exec_file_locate_attach): Use NULL as fd
argument to exec_file_find to avoid having to close
the opened file.
* infrun.c (follow_exec): Likewise.
gdb/ChangeLog:
PR python/18299
* python/lib/gdb/printing.py (register_pretty_printer): Handle
name or __name__ attributes. Handle gdb module as first argument.
gdb/testsuite/ChangeLog:
* gdb.python/py-pp-maint.py: Move "replace" testing to ...
* gdb.python/py-pp-registration.exp: ... here. New file.
* gdb.python/py-pp-registration.c: New file.
* gdb.python/py-pp-registration.py: New file.
gdb/ChangeLog:
PR python/18089
* python/py-prettyprint.c (print_children): Verify result of children
iterator. Provide better error message.
* python/python-internal..h (gdbpy_print_python_errors_p): Declare.
* python/python.c (gdbpy_print_python_errors_p): New function.
gdb/testsuite/ChangeLog:
* gdb.python/py-bad-printers.c: New file.
* gdb.python/py-bad-printers.py: New file.
* gdb.python/py-bad-printers.exp: New file.
We no longer need it as we handle SIGWINCH ourselves. Also move the
call to init_page_info() from initialize_utils() to the latter
function's only caller, gdb_init().
gdb/ChangeLog:
* utils.c (init_page_info): Set rl_catch_sigwinch to zero.
(initialize_utils): Move call of init_page_info() to ...
* top.c (gdb_init): ... here.
When in the CLI, GDB's "width" and "height" variables are not kept in sync
when the underlying terminal gets resized.
This patch fixes this issue by making sure sure to update GDB's "width"
and "height" variables in the !tui_active case of our SIGWINCH handler.
gdb/ChangeLog:
* tui/tui-win.c (tui_sigwinch_handler): Remove now-stale comment.
(tui_sigwinch_handler): Still update our idea of
the terminal's width and height even when TUI is not active.
... to replace the roundabout pattern of
execute_command ("set width %d");
execute_command ("set height %d");
for doing the same thing.
gdb/ChangeLog:
* utils.h (set_screen_width_and_height): Declare.
* utils.c (set_screen_width_and_height): Define.
* tui/tui-win.c (tui_update_gdb_sizes): Use it.
This commit updates follow_exec to use exec_file_find to prefix
the new executable's filename with gdb_sysroot rather than doing
it longhand.
gdb/ChangeLog:
* infrun.c (solist.h): New include.
(follow_exec): Use exec_file_find to prefix execd_pathname
with gdb_sysroot.
gdb/testsuite/ChangeLog:
* gdb.python/py-parameter.exp:
* gdb.guile/scm-parameter.exp: Escape the path that we are
matching against, as it might contain characters that are special
to regular expressions.
Completely removing the assert probably wasn't the best idea, so
reinstate it for allocated sections. Also cope with debug info
potentially referring to a missing plt call stub.
And a tidy. find_global_entry now returns an Address, so make temps
holding the return value of type Address, and compare against
invalid_address.
* powerpc.cc (Target_powerpc::do_dynsym_value): Use Address rather
than unsigned int for find_global_entry result temp. Compare
against invalid_address.
(Target_powerpc::do_plt_address_for_global): Likewise.
(Target_powerpc::Relocate::relocate): Likewise. Don't assert
on plt call stub existence for debug info. Do assert for plt
and global entry stub existence if an alloc section.
Global entry stubs are used on ELFv2 to provide addresses for
functions not defined in a non-PIC executable but whose address is
taken, in much the same way as PLT stub code is used on other
targets to provide function addresses. We don't want to insert a
global entry stub just because (bogus) debug info refers to the
address of a non-local function, but we also don't want gold to die.
* powerpc.cc (Target_powerpc::Relocate::relocate): Don't assert
on missing global entry stub due to bogus debug info.
In tui_set_source_content(), when offset == 0 the source and destination
pointers of the call to strcpy() are actually the same. In this case
not only is strcpy() unnecessary but it is also UB when the two strings
overlap.
gdb/ChangeLog:
* tui/tui-source.c (tui_set_source_content): Avoid calling
strcpy() when offset is 0.
Max Filippov
GDB Administrator
Cary Coutant
DJ Delorie
H.J. Lu
Nick Clifton
Yao Qi
Doug Evans
Luis Machado
Gary Benson
Jiong Wang
Sasha Smundak
Andreas Schwab
John Baldwin
Renlin Li
Patrick Palka
Andy Wingo
Alan Modra