Antoine Tremblay [Thu, 12 Feb 2015 19:55:08 +0000 (14:55 -0500)]
Fix non executable stack handling when calling functions in the inferior.
When gdb creates a dummy frame to execute a function in the inferior,
the process may generate a SIGSEGV, SIGTRAP or SIGILL because the stack
is non executable. If the signal handler set in gdb has option print
or stop enabled for these signals gdb handles this correctly.
However, in the case of noprint and nostop the signal is short-circuited
and the inferior process is sent the signal directly. This causes the
inferior to crash because of gdb.
This patch adds a check for SIGSEGV, SIGTRAP or SIGILL so that these
signals are sent to gdb rather than short-circuited in the inferior.
gdb then handles them properly and the inferior process does not
crash.
This patch also fixes the same behavior in gdbserver.
Also added a small testcase to test the issue called catch-gdb-caused-signals.
David Taylor [Thu, 19 Feb 2015 14:53:50 +0000 (18:53 +0400)]
[gdb/ax] small "setv" fix and documentation's adjustment.
gdb/doc/agentexpr.texi documents the "setv" opcode as follow:
@item @code{setv} (0x2d) @var{n}: @result{} @var{v}
Set trace state variable number @var{n} to the value found on the top
of the stack. The stack is unchanged, so that the value is readily
available if the assignment is part of a larger expression. The
handling of @var{n} is as described for @code{getv}.
The @item line is incorrect (and does not match with its
description), so this patch fixes it.
Additionally, in gdb/common/ax.def we find the line:
DEFOP (setv, 2, 0, 0, 1, 0x2d)
From the comment earlier in the file:
Each line is of the form:
DEFOP (name, size, data_size, consumed, produced, opcode)
[...]
CONSUMED is the number of stack elements consumed.
PRODUCED is the number of stack elements produced.
which is saying that nothing is consumed and one item is produced.
Both should be 0 or both should be 1.
This patch sets them both to 1, which seems better since if nothing
is on the stack an error will occur.
gdb/ChangeLog:
* common/ax.def (setv): Fix consumed entry in setv DEFOP.
gdb/doc/ChangeLog:
* agentexpr.texi (Bytecode Descriptions): Fix summary line for setv.
Mike Frysinger [Thu, 19 Feb 2015 08:41:36 +0000 (03:41 -0500)]
sim: microblaze: fix build failure after opcodes update
Commit 07774fccc3280323f43db9ed204f628503b34663 update the microblaze
opcodes table to avoid C++ collisions, but missed updating the sim.
That caused it to fail to build due to missing keywords.
Patrick Palka [Tue, 17 Feb 2015 16:13:43 +0000 (11:13 -0500)]
Asynchronously resize the TUI
This patch teaches the TUI to resize itself asynchronously instead of
synchronously. Asynchronously resizing the screen when the underlying
terminal gets resized is the more intuitive behavior and is surprisingly
simple to implement thanks to GDB's async infrastructure.
The implementation is straightforward. TUI's SIGWINCH handler is just
tweaked to asynchronously invoke a new callback,
tui_async_resize_screen, which is responsible for safely resizing the
screen. Care must be taken to not to attempt to asynchronously resize
the screen while the TUI is not active. When the TUI is not active, the
callback will do nothing, but the screen will yet be resized in the next
call to tui_enable() by virtue of win_resized being TRUE.
(So, after the patch there are still two places where the screen gets
resized: one in tui_enable() and the other now in
tui_async_resize_screen() as opposed to being in
tui_handle_resize_during_io(). The one in tui_enable() is still
necessary to handle the case where the terminal gets resized inside the
CLI: in that case, the TUI still needs resizing, but it must wait until
the TUI gets re-enabled.)
gdb/ChangeLog:
* tui/tui-io.c (tui_handle_resize_during_io): Remove this
function.
(tui_putc): Don't call tui_handle_resize_during_io.
(tui_getc): Likewise.
(tui_mld_getc): Likewise.
* tui/tui-win.c: Include event-loop.h and tui/tui-io.h.
(tui_sigwinch_token): New static variable.
(tui_initialize_win): Adjust documentation. Set
tui_sigwinch_token.
(tui_async_resize_screen): New asynchronous callback.
(tui_sigwinch_handler): Adjust documentation. Asynchronously
invoke tui_async_resize_screen.
Jose E. Marchesi [Wed, 18 Feb 2015 12:52:53 +0000 (13:52 +0100)]
Factorize target program transformations in the GDB_AC_TRANSFORM macro.
This patch introduces a new M4 macro GDB_AC_TRANSFORM to avoid repeating
the common idiom which is the transformation of target program names,
i.e. from gdb to sparc64-linux-gnu-gdb. It also makes gdb/configure.ac
and gdb/testsuite/configure.ac to use the new macro.
gdb/ChangeLog:
2015-02-18 Jose E. Marchesi <jose.marchesi@oracle.com>
* configure: Regenerated.
* configure.ac: Use GDB_AC_TRANSFORM.
* Makefile.in (aclocal_m4_deps): Added transform.m4.
* acinclude.m4: sinclude transform.m4.
* transform.m4: New file.
(GDB_AC_TRANSFORM): New macro.
gdb/testsuite/ChangeLog:
2015-02-18 Jose E. Marchesi <jose.marchesi@oracle.com>
Jose E. Marchesi [Tue, 17 Feb 2015 15:42:15 +0000 (16:42 +0100)]
Documentation for DTrace USDT probes.
This patch modifies the `Static Probe Points' section on the GDB
manual in order to cover the support for DTrace USDT probes, in
addition to SystemTap SDT probes.
gdb/doc/ChangeLog:
2015-02-17 Jose E. Marchesi <jose.marchesi@oracle.com>
* gdb.texinfo (Static Probe Points): Add cindex `static probe
point, DTrace'.
(Static Probe Points): Modified to cover DTrace probes in addition
to SystemTap probes. Also modified to cover the `enable probe'
and `disable probe' commands.
Jose E. Marchesi [Tue, 17 Feb 2015 15:41:16 +0000 (16:41 +0100)]
Simple testsuite for DTrace USDT probes.
This patch adds some simple tests testing the support for DTrace USDT
probes. The testsuite will be skipped as unsupported in case the user
does not have DTrace installed on her system. The tests included in the
test suite test breakpointing on DTrace probes, enabling and disabling
probes, printing of probe arguments of several types and also
breakpointing on several probes with the same name.
gdb/ChangeLog:
2015-02-17 Jose E. Marchesi <jose.marchesi@oracle.com>
* lib/dtrace.exp: New file.
* gdb.base/dtrace-probe.exp: Likewise.
* gdb.base/dtrace-probe.d: Likewise.
* gdb.base/dtrace-probe.c: Likewise.
* lib/pdtrace.in: Likewise.
* configure.ac: Output variables with the transformed names of
the strip, readelf, as and nm tools. AC_SUBST lib/pdtrace.in.
* configure: Regenerated.
Jose E. Marchesi [Tue, 17 Feb 2015 15:04:01 +0000 (16:04 +0100)]
Support for DTrace USDT probes in x86_64 targets.
This patch adds the target-specific code in order to support the
calculation of DTrace probes arguments in x86_64 targets, and also the
enabling and disabling of probes. This is done by implementing the
`dtrace_*' gdbarch handlers.
gdb/ChangeLog:
2015-02-17 Jose E. Marchesi <jose.marchesi@oracle.com>
* amd64-linux-tdep.c: Include "parser-defs.h" and "user-regs.h".
(amd64_dtrace_parse_probe_argument): New function.
(amd64_dtrace_probe_is_enabled): Likewise.
(amd64_dtrace_enable_probe): Likewise.
(amd64_dtrace_disable_probe): Likewise.
(amd64_linux_init_abi): Register the
`gdbarch_dtrace_probe_argument', `gdbarch_dtrace_enable_probe',
`gdbarch_dtrace_disable_probe' and
`gdbarch_dtrace_probe_is_enabled' hooks.
(amd64_dtrace_disabled_probe_sequence_1): New constant.
(amd64_dtrace_disabled_probe_sequence_2): Likewise.
(amd64_dtrace_enable_probe_sequence): Likewise.
(amd64_dtrace_disable_probe_sequence): Likewise.
Jose E. Marchesi [Tue, 17 Feb 2015 15:03:22 +0000 (16:03 +0100)]
New probe type: DTrace USDT probes.
This patch adds a new type of probe to GDB: the DTrace USDT probes. The new
type is added by providing functions implementing all the entries of the
`probe_ops' structure defined in `probe.h'. The implementation is
self-contained and does not depend on DTrace source code in any way.
gdb/ChangeLog:
2015-02-7 Jose E. Marchesi <jose.marchesi@oracle.com>
* breakpoint.c (BREAK_ARGS_HELP): Help string updated to mention
the -probe-dtrace new vpossible value for PROBE_MODIFIER.
* configure.ac (CONFIG_OBS): dtrace-probe.o added if BFD can
handle ELF files.
* Makefile.in (SFILES): dtrace-probe.c added.
* configure: Regenerate.
* dtrace-probe.c: New file.
(SHT_SUNW_dof): New constant.
(dtrace_probe_type): New enum.
(dtrace_probe_arg): New struct.
(dtrace_probe_arg_s): New typedef.
(struct dtrace_probe_enabler): New struct.
(dtrace_probe_enabler_s): New typedef.
(dtrace_probe): New struct.
(dtrace_probe_is_linespec): New function.
(dtrace_dof_sect_type): New enum.
(dtrace_dof_dofh_ident): Likewise.
(dtrace_dof_encoding): Likewise.
(DTRACE_DOF_ENCODE_LSB): Likewise.
(DTRACE_DOF_ENCODE_MSB): Likewise.
(dtrace_dof_hdr): New struct.
(dtrace_dof_sect): Likewise.
(dtrace_dof_provider): Likewise.
(dtrace_dof_probe): Likewise.
(DOF_UINT): New macro.
(DTRACE_DOF_PTR): Likewise.
(DTRACE_DOF_SECT): Likewise.
(dtrace_process_dof_probe): New function.
(dtrace_process_dof): Likewise.
(dtrace_build_arg_exprs): Likewise.
(dtrace_get_arg): Likewise.
(dtrace_get_probes): Likewise.
(dtrace_get_probe_argument_count): Likewise.
(dtrace_can_evaluate_probe_arguments): Likewise.
(dtrace_evaluate_probe_argument): Likewise.
(dtrace_compile_to_ax): Likewise.
(dtrace_probe_destroy): Likewise.
(dtrace_gen_info_probes_table_header): Likewise.
(dtrace_gen_info_probes_table_values): Likewise.
(dtrace_probe_is_enabled): Likewise.
(dtrace_probe_ops): New variable.
(info_probes_dtrace_command): New function.
(_initialize_dtrace_probe): Likewise.
(dtrace_type_name): Likewise.
Jose E. Marchesi [Tue, 17 Feb 2015 14:54:44 +0000 (15:54 +0100)]
New gdbarch functions: dtrace_parse_probe_argument, dtrace_probe_is_enabled, dtrace_enable_probe, dtrace_disable_probe.
This patch adds several gdbarch functions (along with the corresponding
predicates): `dtrace_parse_probe_argument', `dtrace_probe_is_enabled',
`dtrace_enable_probe' and `dtrace_disable_probe'. These functions will
be implemented by target-specific code, and called from the DTrace
probes implementation in order to calculate the value of probe
arguments, and manipulate is-enabled probes.
gdb/ChangeLog:
2015-02-17 Jose E. Marchesi <jose.marchesi@oracle.com>
Jose E. Marchesi [Tue, 17 Feb 2015 14:51:07 +0000 (15:51 +0100)]
New commands `enable probe' and `disable probe'.
This patch adds the above-mentioned commands to the generic probe
abstraction implemented in probe.[ch]. The effects associated to
enabling or disabling a probe depend on the type of probe being
handled, and is triggered by invoking two back-end hooks in
`probe_ops'.
In case some particular probe type does not support the notion of
enabling and/or disabling, the corresponding fields on `probe_ops' can
be initialized to NULL. This is the case of SystemTap probes.
gdb/ChangeLog:
2015-02-17 Jose E. Marchesi <jose.marchesi@oracle.com>
* stap-probe.c (stap_probe_ops): Add NULLs in the static
stap_probe_ops for `enable_probe' and `disable_probe'.
* probe.c (enable_probes_command): New function.
(disable_probes_command): Likewise.
(_initialize_probe): Define the cli commands `enable probe' and
`disable probe'.
(parse_probe_linespec): New function.
(info_probes_for_ops): Use parse_probe_linespec.
* probe.h (probe_ops): New hooks `enable_probe' and
`disable_probe'.
gdb/doc/ChangeLog:
2015-02-17 Jose E. Marchesi <jose.marchesi@oracle.com>
* gdb.texinfo (Static Probe Points): Cover the `enable probe' and
`disable probe' commands.
Jose E. Marchesi [Tue, 17 Feb 2015 14:50:19 +0000 (15:50 +0100)]
Move `compute_probe_arg' and `compile_probe_arg' to probe.c
This patch moves the `compute_probe_arg' and `compile_probe_arg' functions
from stap-probe.c to probe.c. The rationale is that it is reasonable to
assume that all backends will provide the `$_probe_argN' convenience
variables, and that the user must be placed on the PC of the probe when
requesting that information. The value and type of the argument can still be
determined by the probe backend via the `pops->evaluate_probe_argument' and
`pops->compile_to_ax' handlers.
Note that a test in gdb.base/stap-probe.exp had to be adjusted because the "No
SystemTap probe at PC" messages are now "No probe at PC".
gdb/ChangeLog:
2015-02-17 Jose E. Marchesi <jose.marchesi@oracle.com>
* probe.c (compute_probe_arg): Moved from stap-probe.c
(compile_probe_arg): Likewise.
(probe_funcs): Likewise.
* stap-probe.c (compute_probe_arg): Moved to probe.c.
(compile_probe_arg): Likewise.
(probe_funcs): Likewise.
gdb/testsuite/ChangeLog:
2015-02-17 Jose E. Marchesi <jose.marchesi@oracle.com>
* gdb.base/stap-probe.exp (stap_test): Remove "SystemTap" from
expected message when trying to access $_probe_* convenience
variables while not on a probe.
Jose E. Marchesi [Tue, 17 Feb 2015 14:49:12 +0000 (15:49 +0100)]
Adapt `info probes' to support printing probes of different types.
A "probe type" (backend for the probe abstraction implemented in
probe.[ch]) can extend the information printed by `info probes' by
defining additional columns. This means that when `info probes' is
used to print all the probes regardless of their types, some of the
columns will be "not applicable" to some of the probes (like, say, the
Semaphore column only makes sense for SystemTap probes). This patch
makes `info probes' fill these slots with "n/a" marks (currently it
breaks the table) and not include headers for which no actual probe
has been found in the list of defined probes.
This patch also adds support for a new generic column "Type", that
displays the type of each probe. SystemTap probes identify themselves
as "stap" probes.
gdb/ChangeLog:
2015-02-17 Jose E. Marchesi <jose.marchesi@oracle.com>
* probe.c (print_ui_out_not_applicables): New function.
(exists_probe_with_pops): Likewise.
(info_probes_for_ops): Do not include column headers for probe
types for which no probe has been actually found on any object.
Also invoke `print_ui_out_not_applicables' in order to match the
column rows with the header when probes of several types are
listed.
Print the "Type" column.
* probe.h (probe_ops): Added a new probe operation `type_name'.
* stap-probe.c (stap_probe_ops): Add `stap_type_name'.
(stap_type_name): New function.
Alan Modra [Mon, 16 Feb 2015 22:44:59 +0000 (09:14 +1030)]
Properly place the NULL STT_FILE symbol revistited
I was having a little closer look at what is going on here and noticed
that HJ unconditionally emits a NULL STT_FILE symbol before emitting
forced local symbols. That means we really don't need a second pass
over forced local symbols. The only reason for two passes is when
some forced local symbol can be emitted before the NULL STT_FILE. So
I set about removing the second pass, updating the testsuite all over
again. It's also unnecessary to emit the NULL STT_FILE when no
previous file symbol has been emitted.
bfd/
PR ld/17975
* elflink.c (struct elf_outext_info): Remove need_second_pass
and second_pass.
(elf_link_output_extsym): Delete code handling second forced
local pass. Move code emitting NULL STT_FILE symbol later, so
that it can be omitted if forced local is stripped. Don't
emit the NULL STT_FILE if no file symbols have been output.
(bfd_elf_final_link): Remove second forced local pass.
* elf32-ppc.c (add_stub_sym): Set linker_def on linker syms.
(ppc_elf_size_dynamic_sections): Likewise.
* elf64-ppc.c (ppc_build_one_stub): Likewise.
(build_global_entry_stubs): Likewise.
(ppc64_elf_build_stubs): Likewise.
ld/testsuite/
PR ld/17975
* ld-aarch64/gc-tls-relocs.d, * ld-alpha/tlspic.rd,
* ld-cris/libdso-2.d, * ld-i386/tlsdesc-nacl.rd, * ld-i386/tlsdesc.rd,
* ld-i386/tlsnopic-nacl.rd, * ld-i386/tlsnopic.rd,
* ld-i386/tlspic-nacl.rd, * ld-i386/tlspic.rd, * ld-ia64/tlspic.rd,
* ld-powerpc/tlsexe.r, * ld-powerpc/tlsexetoc.r,
* ld-powerpc/tlsso.r, * ld-powerpc/tlstocso.r,
* ld-s390/tlspic.rd, * ld-s390/tlspic_64.rd,
* ld-sparc/tlssunnopic32.rd, * ld-sparc/tlssunnopic64.rd,
* ld-sparc/tlssunpic32.rd, * ld-sparc/tlssunpic64.rd,
* ld-tic6x/shlib-1.rd, * ld-tic6x/shlib-1b.rd, * ld-tic6x/shlib-1r.rd,
* ld-tic6x/shlib-1rb.rd, * ld-tic6x/shlib-noindex.rd,
* ld-x86-64/tlsdesc-nacl.rd, * ld-x86-64/tlsdesc.rd,
* ld-x86-64/tlspic-nacl.rd, * ld-x86-64/tlspic.rd: Update.
Patrick Palka [Tue, 17 Feb 2015 13:06:10 +0000 (08:06 -0500)]
Remove superfluous function key_is_command_char()
The function key_is_command_char() is simply a predicate that determines
whether the function tui_dispatch_ctrl_char() will do anything useful.
Since tui_dispatch_ctrl_char() performs the same checks as
key_is_command_char() it is unnecessary to keep key_is_command_char()
around. This patch removes this useless function and instead
unconditionally calls tui_dispatch_ctrl_char() inside its only caller,
tui_getc().
Pedro Alves [Tue, 17 Feb 2015 10:05:52 +0000 (10:05 +0000)]
TUI: resize windows to new terminal size before displaying them
If the user:
#1 - disables the TUI
#2 - resizes the terminal
#3 - and then re-enables the TUI
the next wgetch() returns KEY_RESIZE. This indicates to the ncurses
client that ncurses detected that the terminal has been resized. We
don't handle KEY_RESIZE anywhere, so it gets passed on to readline
which interprets it as a multibyte character, and then the end result
is that the first key press after enabling the TUI is misinterpreted.
We shouldn't really need to handle KEY_RESIZE (and not all ncurses
implementations have that). We have our own SIGWINCH handler, and,
when we re-enable the TUI, we explicitly detect terminal resizes and
resize all windows. The reason ncurses currently does detects a
resize is that something within tui_enable forces a refresh/display of
some window before we get to do the actual resizing. Setting a break
on ncurses' 'resizeterm' function helps find the culprit(s):
(top-gdb) bt
#0 resizeterm (ToLines=28, ToCols=114) at ../../ncurses/base/resizeterm.c:462
#1 0x0000003b42812f3f in _nc_update_screensize (sp=0x2674730) at ../../ncurses/tinfo/lib_setup.c:443
#2 0x0000003b0821cbe0 in doupdate () at ../../ncurses/tty/tty_update.c:726
#3 0x0000003b08215539 in wrefresh (win=0x2a7bc00) at ../../ncurses/base/lib_refresh.c:65
#4 0x00000000005257cb in tui_refresh_win (win_info=0xd73d60 <_locator>) at /home/pedro/gdb/mygit/src/gdb/tui/tui-wingeneral.c:60
#5 0x000000000052265b in tui_show_locator_content () at /home/pedro/gdb/mygit/src/gdb/tui/tui-stack.c:269
#6 0x00000000005273a6 in tui_set_key_mode (mode=TUI_COMMAND_MODE) at /home/pedro/gdb/mygit/src/gdb/tui/tui.c:321
#7 0x00000000005278c7 in tui_enable () at /home/pedro/gdb/mygit/src/gdb/tui/tui.c:494
#8 0x0000000000527011 in tui_rl_switch_mode (notused1=1, notused2=1) at /home/pedro/gdb/mygit/src/gdb/tui/tui.c:108
That is, tui_enable calls tui_set_key_mode before we've resized all
windows, and that refreshes a window as side effect.
And if we're already debugging something (there's a frame), then we'll
instead show a window from within tui_show_frame_info:
(top-gdb) bt
#0 resizeterm (ToLines=28, ToCols=114) at ../../ncurses/base/resizeterm.c:462
#1 0x0000003b42812f3f in _nc_update_screensize (sp=0x202e6c0) at ../../ncurses/tinfo/lib_setup.c:443
#2 0x0000003b0821cbe0 in doupdate () at ../../ncurses/tty/tty_update.c:726
#3 0x0000003b08215539 in wrefresh (win=0x2042890) at ../../ncurses/base/lib_refresh.c:65
#4 0x00000000005257cb in tui_refresh_win (win_info=0xd73d60 <_locator>) at /home/pedro/gdb/mygit/src/gdb/tui/tui-wingeneral.c:60
#5 0x000000000052265b in tui_show_locator_content () at /home/pedro/gdb/mygit/src/gdb/tui/tui-stack.c:269
#6 0x0000000000522931 in tui_show_frame_info (fi=0x16b9cc0) at /home/pedro/gdb/mygit/src/gdb/tui/tui-stack.c:364
#7 0x00000000005278ba in tui_enable () at /home/pedro/gdb/mygit/src/gdb/tui/tui.c:491
#8 0x0000000000527011 in tui_rl_switch_mode (notused1=1, notused2=1) at /home/pedro/gdb/mygit/src/gdb/tui/tui.c:108
The fix is to resize windows earlier.
gdb/ChangeLog:
2015-02-17 Pedro Alves <palves@redhat.com>
* tui/tui.c (tui_enable): Resize windows before anything
might show a window.
Maxim Ostapenko [Mon, 16 Feb 2015 16:24:53 +0000 (20:24 +0400)]
Fix GDB build fail on Aarch64 when -fno-common is enabled
Current trunk GDB (and gdb-7.8.1 too) fails to build on Aarch64 when
-fno-common is enabled. It fails during link stage due to multiple
definition of `tdesc_aarch64':
...
[ 199s] aarch64-linux-nat.o: In function `initialize_tdesc_aarch64':
[ 199s]
/home/abuild/rpmbuild/BUILD/gdb-7.8.1/gdb/features/aarch64.c:11:
multiple definition of `tdesc_aarch64'
[ 199s]
aarch64-tdep.o:/home/abuild/rpmbuild/BUILD/gdb-7.8.1/gdb/objfiles.h:540:
first defined here
[ 199s] aarch64-linux-nat.o: In function `initialize_tdesc_aarch64':
[ 199s]
/home/abuild/rpmbuild/BUILD/gdb-7.8.1/gdb/features/aarch64.c:11:
multiple definition of `tdesc_aarch64'
[ 199s]
aarch64-tdep.o:/home/abuild/rpmbuild/BUILD/gdb-7.8.1/gdb/objfiles.h:540:
first defined here
[ 199s] collect2: error: ld returned 1 exit status
[ 199s] make[2]: *** [gdb] Error 1
...
This happens because struct target_desc *tdesc_aarch64 is defined in
gdb/features/aarch64.c, which is included by two files
(gdb/aarch64-linux-nat.c and gdb/aarch64-tdep.c).
gdb/Changelog
2015-02-17 Max Ostapenko <m.ostapenko@partner.samsung.com>
Mark Wielaard [Mon, 9 Feb 2015 23:02:34 +0000 (00:02 +0100)]
[gold] Recognize DWARF5/GCC5 DW_LANG_Fortran03 and DW_LANG_Fortran08.
DWARFv5 defines and GCC5 may output two new DW_LANG constants for the
Fortran 2003 and Fortran 2008 standards. Recognize both in gold gdb-index
as unsupported.
For consistency also add the other new DWARF5/GCC5 language constants in
the elfcpp::DW_LANG enum to match include/dwarf2.h.
elfcpp/ChangeLog:
* dwarf.h (enum DW_LANG): Add DW_LANG_C_plus_plus_11,
DW_LANG_C11, DW_LANG_C_plus_plus_14, DW_LANG_Fortran03 and
DW_LANG_Fortran08 from ../include/dwarf2.h.
gold/ChangeLog:
* gdb-index.cc (Gdb_index_info_reader::visit_top_die): Recognize
DW_LANG_Fortran03 and DW_LANG_Fortran08.
Cary Coutant [Tue, 17 Feb 2015 06:15:12 +0000 (22:15 -0800)]
Fix --dynamic-list so that symbols not in the list are still exported.
In PR 13577, the complaint was that -Bsymbolic was overriding the binding
behavior for symbols listed in the --dynamic-list by setting the DT_SYMBOLIC
tag in the dynamic table. In reading the Gnu ld manual, I decided that
--dynamic-list should be mutually exclusive of -Bsymbolic, and modified
gold so that --dynamic-list would treat symbols listed as preemptible,
and all other symbols as internally bound. I was wrong.
PR 16992 shows that with --dynamic-list (and not -Bsymbolic), a symbol
not listed in the dynamic list is being internally bound within the
shared library, but because it's still in the dynamic symbol table, we
expose it to a COPY relocation, and things go really bad from there.
(I can reproduce the same failure, simply by turning on -Bsymbolic-functions
with the Gnu linker. Even though the symbol is bound internally, it's
still exported to the dynamic symbol table, and is exposed to a COPY
relocation.)
I've backed out part of the fix for PR 13577, and -Bsymbolic (or
-Bsymbolic-functions) can now be used with --dynamic-list, but if the
two are used together, we do not set DT_SYMBOLIC or DF_SYMBOLIC
(this matches Gnu ld behavior). We now treat symbols listed in the
dynamic list as premptible, but we do not automatically treat symbols
not listed there as non-premptible.
gold/
PR gold/13577
PR gold/16992
* layout.cc (Layout::finish_dynamic_section): Don't set DT_SYMBOLIC or
DF_SYMBOLIC if --dynamic-list option is used.
* options.cc (General_options::finalize): --dynamic-list is not
mutually exclusive with -Bsymbolic.
* symtab.h (Symbol::is_preemptible): Don't exclude dynamic symbols not
listed in --dynamic-list.
* testsuite/Makefile.am (dynamic_list_lib2.so): Add
-Bsymbolic-functions.
* testsuite/Makefile.in: Regenerate.
H.J. Lu [Sun, 15 Feb 2015 04:17:28 +0000 (20:17 -0800)]
Properly place the NULL STT_FILE symbol
We output a NULL STT_FILE symbol for forced local symbols so that they
are not associated with the STT_FILE symbol for real local symbols. This
patch makes sure that the NULL STT_FILE symbol is placed before forced
local symbols.
bfd/
PR ld/17975
* elflink.c (elf_link_output_extsym): Only check filesym_count
when outputting a NULL FILE symbol. Set second_pass_sym to
h->forced_local && !h->root.linker_def.
H.J. Lu [Sat, 14 Feb 2015 13:45:08 +0000 (05:45 -0800)]
Add a testcase for PR ld/17973
ld/
PR ld/17973
* testplug2.c (allsymbolsread_silent): New.
(set_register_hook): Handle allsymbolsreadsilent.
(onall_symbols_read): Skip a message if allsymbolsread_silent is
TRUE.
ld/testsuite/
PR ld/17973
* ld-plugin/plugin.exp (regassilent): New.
Compile tmpdir/dummy.s and ld-plugin/pr17973.s.
(plugin_tests): Add a test for PR ld/17973.
* ld-plugin/pr17973.d: New file.
* ld-plugin/pr17973.s: Likewise.
Alan Modra [Sat, 14 Feb 2015 08:08:32 +0000 (18:38 +1030)]
PR ld/17973 LTO file syms
LTO output objects have an STT_FILE symbol using the name of the file,
a temporary file. This results in executables that can't be exactly
reproduced, so the file name needs to be dropped. We don't want to
lose all file symbols when linking a mix of lto and non-lto objects as
a file symbol can be used to figure which source file generated a
given local symbol. So lto output objects need to be marked.
I chose to mark lto output objects with a new bfd flag. This flag is
also used to fix a bug in the link-once handling; An object being
loaded after "loading_lto_outputs" is set might be one extracted from
an archive to satisfy new references from lto objects, not an lto
object itself.
The new flag is copied from archive to elements, and the same done
for no_export. This fixes a bug in that --exclude-libs doesn't work
with thin archives. I'm not completely happy with this part of the
patch and may revist this to avoid the hack in
_bfd_look_for_bfd_in_cache.
PR ld/17973
include/
* bfdlink.h (struct bfd_link_info): Delete loading_lto_outputs.
bfd/
* bfd.c (struct bfd): Add lto_output.
* linker.c (_bfd_handle_already_linked): Explicitly test for
objects added by the lto plugin.
* opncls.c (_bfd_new_bfd_contained_in): Copy lto_output and
no_export flags from archive.
* archive.c (open_nested_file): New function, setting lto_output
and no_export, extracted from..
(find_nested_archive): ..here. Flip params. Rename from
_bfd_find_nested_archive.
(_bfd_get_elt_at_filepos): Correct var typo. Use open_nested_file.
(_bfd_look_for_bfd_in_cache): Copy no_export.
* elflink.c (elf_link_add_object_symbols): Remove now unnecessary
my_archive->no_export test.
(elf_link_input_bfd): Drop existing lto_output STT_FILE syms.
Don't use the file name when adding lto_output STT_FILE sym.
* bfd-in2.h: Regenerate.
ld/
* ldlang.h (struct lang_input_statement_flags): Add lto_output.
* ldlang.c (lang_process): Don't set loading_lto_outputs.
* ldfile.c (ldfile_try_open_bfd): Transfer entry flags.lto_output
to bfd.
* plugin.c (add_input_file, add_input_library): Set flags.lto_output.
Doug Evans [Fri, 13 Feb 2015 20:03:50 +0000 (12:03 -0800)]
misc cp-namespace.c cleanups
gdb/ChangeLog:
* cp-namespace.c (cp_basic_lookup_symbol): Rename parameter
anonymous_namespace to is_in_anonymous for consistency with the rest
of the file.
(cp_lookup_bare_symbol): Fix typo in comment.
(cp_search_static_and_baseclasses): Ditto.
(search_symbol_list): Use vertical space in comment better.
(reset_directive_searched): Ditto. Fix typo.
(cp_lookup_nested_symbol_1): Clarify contents of NESTED_NAME parameter.
Nick Clifton [Fri, 13 Feb 2015 14:17:18 +0000 (14:17 +0000)]
Fixes for memory access violations triggered by running readelf on fuzzed binaries.
PR binutils/17531
* dwarf.c (display_debug_aranges): Add check for an excessive
ar_length value.
(process_cu_tu_index): Check for a row * columns sum being too
large.
Nick Clifton [Fri, 13 Feb 2015 12:14:05 +0000 (12:14 +0000)]
Fix illegal memory access errors triggered by running srconv on fuzzed binaries.
PR binutils/17512
* dwarf.c (read_leb128): Fix test for shift becoming too large.
* coffgrok.c (do_define): Add check for type size overflow.
* srconv.c (walk_tree_sfile): Check that enough sections are
available before parsing.
(prescan): Likewise.
Nick Clifton [Thu, 12 Feb 2015 16:45:11 +0000 (16:45 +0000)]
Fix memory access violations triggered by running addr2line on fuzzed binaries.
PR binutils/17512
* dwarf.c (read_1_byte, read_1_signed_byte, read_2_bytes)
(read_4_bytes, read_8_bytes, read_n_bytes, read_string)
(read_indirect_string, read_alt_indirect_string)
(read_alt_indirect_ref, read_address, read_abbrevs)
(read_attribute_value, read_attribute, decode_line_info)
(find_abstract_instance_name, read_rangelist)
(scan_unit_for_symbols, parse_comp_unit)
(_bfd_dwarf2_find_nearest_line): Harden DWARF reading code. Pass
end pointers to reading functions and check for offsets taking
pointers out of range. Replace calls to read_*_leb128 with calls
to safe_read_leb128.
(* elf64-ppc.c (opd_entry_value): Add a check for an overlarge
offset.
* syms.c (_bfd_stab_section_find_nearest_line): Add checks for
computed file_name address being before the start of the string
table.
H.J. Lu [Wed, 11 Feb 2015 20:16:07 +0000 (12:16 -0800)]
Output "warning:" or "error:" in plugin messages
When plugin generates LDPL_WARNING, LDPL_FATAL and LDPL_ERROR messages,
linker should display "warning:" or "error:" in plugin messages like
regular linker messages.
ld/
* plugin.c (message): Output "warning:" for LDPL_WARNING. Output
"error:" for LDPL_FATAL and LDPL_ERROR.
* testplug2.c (parse_option): Handle fatal, error and warning.
ld/testsuite/
* ld-plugin/plugin-27.d: New.
* ld-plugin/plugin-28.d: Likewise.
* ld-plugin/plugin-29.d: Likewise.
* plugin.exp (plugin_tests): Add tests for LDPL_FATAL, LDPL_ERROR
and LDPL_WARNING.
Nick Clifton [Wed, 11 Feb 2015 14:36:39 +0000 (14:36 +0000)]
Fixes a problem with the RL78 disassembler which would incorrectly disassemble [HL+0] as [HL].
* rl78-decode.opc: Add 'a' attribute to instructions that support
[HL+0] addressing.
* rl78-decode.c: Regenerate.
* rl78-dis.c (print_insn_rl78): Display the offset in [HL+0]
addresses.
Jan Kratochvil [Wed, 11 Feb 2015 13:44:00 +0000 (14:44 +0100)]
framefilter quit: Make it exception safe
gdb/ChangeLog
2015-02-11 Jan Kratochvil <jan.kratochvil@redhat.com>
* python/py-framefilter.c (py_print_frame): Mention RETURN_QUIT in
function comment. Wrap all function that can throw in cleanups.
(gdbpy_apply_frame_filter): Wrap all function that can throw in
cleanups.
Jan Kratochvil [Wed, 11 Feb 2015 13:40:14 +0000 (14:40 +0100)]
framefilter quit: Code cleanup: Avoid gotos
goto error patters are sometimes AFAIK used in C for the cases like:
int retval=-1;
if (!(a=malloc())) goto error;
if (!(b=malloc())) goto error_a;
if (!(c=malloc())) goto error_b;
retval=0;
error_c: free(c);
error_b: free(b);
error_a: free(a);
error: return retval;
But here there is single error label with one do_cleanups() which I do not find
it worth the goto complication. Without goto one can then furher merge code in
the exit paths in the next patches and ... after all it is all the same, just
without a goto.
gdb/ChangeLog
2015-02-11 Jan Kratochvil <jan.kratochvil@redhat.com>
* python/py-framefilter.c (py_print_frame): Substitute goto error.
Remove the error label.
Jan Kratochvil [Wed, 11 Feb 2015 13:37:40 +0000 (14:37 +0100)]
framefilter quit: Code cleanup: Reindentation
Nothing significant but I find code more clear with less deep indentation.
gdb/ChangeLog
2015-02-11 Jan Kratochvil <jan.kratochvil@redhat.com>
* python/py-framefilter.c (py_print_frame): Put conditional code paths
with goto first, indent the former else codepath left. Put variable
'elided' to a new inner block.
Nick Clifton [Wed, 11 Feb 2015 13:05:04 +0000 (13:05 +0000)]
Fixes for invalid memory accesses triggered by running readelf on fuzzed binaries.
PR binutils/17531
* dwarf.c (display_debug_pubnames_worker): Work around compiler
bug checking address ranges.
(display_debug_frames): Likewise.
(display_gdb_index): Likewise.
(process_cu_tu_index): Add range check on the ncols value.
H.J. Lu [Wed, 11 Feb 2015 13:01:03 +0000 (05:01 -0800)]
Merge linker plugin handling into BFD plugin support
Linker plugin_maybe_claim is the interface of linker plugin support.
This patch extracts linker plugin_maybe_claim into plugin_object_p and
makes it available to BFD via a new function:
bfd_plugin_object_p calls plugin_object_p registered by linker first. It
adds an enum bfd_plugin_format field and a pointer to plugin dummy BFD so
that plugin_object_p stores plugin dummy BFD to allow plugin_maybe_claim
to retrieve it later.
bfd/
PR ld/17878
* bfd.c (bfd_plugin_format): New.
(bfd): Add plugin_format and plugin_dummy_bfd.
* plugin.c (try_load_plugin): Take a pointer to bfd_boolean
argument to return TRUE if any plugin is found. Set plugin_format.
(has_plugin): New.
(bfd_plugin_target_p): New.
(bfd_plugin_specified_p): Likewise.
(bfd_plugin_target_p): Likewise.
(register_ld_plugin_object_p): Likewise.
(bfd_plugin_set_plugin): Set has_plugin.
(load_plugin): Cache try_load_plugin result.
(bfd_plugin_object_p): Try ld_plugin_object_p first. Check
plugin_format.
* plugin.h (bfd_plugin_target_p): New.
(bfd_plugin_specified_p): Likewise.
(register_ld_plugin_object_p): Likewise.
* bfd-in2.h: Regenerated.
ld/
PR ld/17878
* plugin.c: Include ../bfd/plugin.h.
(plugin_get_ir_dummy_bfd): Call bfd_create with
link_info.output_bfd instead of srctemplate. Copy BFD info
from srctemplate only if it doesn't use BFD plugin target
vector.
(plugin_load_plugins): Call register_ld_plugin_object_p with
(plugin_object_p)
(plugin_maybe_claim): Renamed to ...
(plugin_object_p): This. Return dummy BFD target vector if
input is calimed by plugin library, otherwise return NULL.
Update plugin_format and plugin_dummy_bfd.
(plugin_maybe_claim): New. Use plugin_object_p.
Tom Tromey [Wed, 11 Feb 2015 11:20:21 +0000 (11:20 +0000)]
Fix redefinition errors in C++ mode
In C, we can forward declare static structure instances. That doesn't
work in C++ though. C++ treats these as definitions. So then the
compiler complains about symbol redefinition, like:
src/gdb/elfread.c:1569:29: error: redefinition of ‘const sym_fns elf_sym_fns_lazy_psyms’
src/gdb/elfread.c:53:29: error: ‘const sym_fns elf_sym_fns_lazy_psyms’ previously declared here
The intent of static here is naturally to avoid making these objects
visible outside the compilation unit. The equivalent in C++ would be
to instead define the objects in the anonymous namespace. But given
that it's desirable to leave the codebase compiling as both C and C++
for a while, this just makes the objects extern.
(base_breakpoint_ops is already declared in breakpoint.h, so we can
just remove the forward declare from breakpoint.c)
gdb/ChangeLog:
2015-02-11 Tom Tromey <tromey@redhat.com>
Pedro Alves <palves@redhat.com>
* breakpoint.c (base_breakpoint_ops): Delete.
* dwarf2loc.c (dwarf_expr_ctx_funcs): Make extern.
* elfread.c (elf_sym_fns_gdb_index, elf_sym_fns_lazy_psyms): Make extern.
* guile/guile.c (guile_extension_script_ops, guile_extension_ops): Make extern.
* ppcnbsd-tdep.c (ppcnbsd2_sigtramp): Make extern.
* python/py-arch.c (arch_object_type): Make extern.
* python/py-block.c (block_syms_iterator_object_type): Make extern.
* python/py-bpevent.c (breakpoint_event_object_type): Make extern.
* python/py-cmd.c (cmdpy_object_type): Make extern.
* python/py-continueevent.c (continue_event_object_type)
* python/py-event.h (GDBPY_NEW_EVENT_TYPE): Remove 'qual'
parameter. Update all callers.
* python/py-evtregistry.c (eventregistry_object_type): Make extern.
* python/py-exitedevent.c (exited_event_object_type): Make extern.
* python/py-finishbreakpoint.c (finish_breakpoint_object_type): Make extern.
* python/py-function.c (fnpy_object_type): Make extern.
* python/py-inferior.c (inferior_object_type, membuf_object_type): Make extern.
* python/py-infevents.c (call_pre_event_object_type)
(inferior_call_post_event_object_type).
(memory_changed_event_object_type): Make extern.
* python/py-infthread.c (thread_object_type): Make extern.
* python/py-lazy-string.c (lazy_string_object_type): Make extern.
* python/py-linetable.c (linetable_entry_object_type)
(linetable_object_type, ltpy_iterator_object_type): Make extern.
* python/py-newobjfileevent.c (new_objfile_event_object_type)
(clear_objfiles_event_object_type): Make extern.
* python/py-objfile.c (objfile_object_type): Make extern.
* python/py-param.c (parmpy_object_type): Make extern.
* python/py-progspace.c (pspace_object_type): Make extern.
* python/py-signalevent.c (signal_event_object_type): Make extern.
* python/py-symtab.c (symtab_object_type, sal_object_type): Make extern.
* python/py-type.c (type_object_type, field_object_type)
(type_iterator_object_type): Make extern.
* python/python.c (python_extension_script_ops)
(python_extension_ops): Make extern.
* stap-probe.c (stap_probe_ops): Make extern.
Pedro Alves [Wed, 11 Feb 2015 09:45:41 +0000 (09:45 +0000)]
Fix adjust_pc_after_break, remove still current thread check
On decr_pc_after_break targets, GDB adjusts the PC incorrectly if a
background single-step stops somewhere where PC-$decr_pc has a
breakpoint, and the thread that finishes the step is not the current
thread, like:
ADDR1 nop <-- breakpoint here
ADDR2 jmp PC
IOW, say thread A is stepping ADDR2's line in the background (an
infinite loop), and the user switches focus to thread B. GDB's
adjust_pc_after_break logic confuses the single-step stop of thread A
for a hit of the breakpoint at ADDR1, and thus adjusts thread A's PC
to point at ADDR1 when it should not, and reports a breakpoint hit,
when thread A did not execute the instruction at ADDR1 at all.
The test added by this patch exercises exactly that.
I can't find any reason we'd need the "thread to be examined is still
the current thread" condition in adjust_pc_after_break, at least
nowadays; it might have made sense in the past. Best just remove it,
and rely on currently_stepping().
Here's the test's log of a run with an unpatched GDB:
35 while (1);
(gdb) PASS: gdb.threads/step-bg-decr-pc-switch-thread.exp: next over nop
next&
(gdb) PASS: gdb.threads/step-bg-decr-pc-switch-thread.exp: next& over inf loop
thread 1
[Switching to thread 1 (Thread 0x7ffff7fc2740 (LWP 29027))](running)
(gdb)
PASS: gdb.threads/step-bg-decr-pc-switch-thread.exp: switch to main thread
Breakpoint 2, thread_function (arg=0x0) at ...src/gdb/testsuite/gdb.threads/step-bg-decr-pc-switch-thread.c:34
34 NOP; /* set breakpoint here */
FAIL: gdb.threads/step-bg-decr-pc-switch-thread.exp: no output while stepping
gdb/ChangeLog:
2015-02-11 Pedro Alves <pedro@codesourcery.com>
* infrun.c (adjust_pc_after_break): Don't adjust the PC just
because the event thread is not the current thread.
gdb/testsuite/ChangeLog:
2015-02-11 Pedro Alves <pedro@codesourcery.com>
* gdb.threads/step-bg-decr-pc-switch-thread.c: New file.
* gdb.threads/step-bg-decr-pc-switch-thread.exp: New file.
H.J. Lu [Wed, 11 Feb 2015 01:01:17 +0000 (17:01 -0800)]
Unmap the buffer if plugin didn't claim the file
If plugin didn't claim the file, unmap the buffer.
* plugin.c (plugin_input_file_t): Add use_mmap.
(plugin_pagesize): New.
(get_view): Use plugin_pagesize. Set use_mmap if mmap is used.
(plugin_load_plugins): Initialize plugin_pagesize.
(plugin_maybe_claim): Unmap the buffer if plugin didn't claim the
file.
projects / thirdparty / binutils-gdb.git / log
