platform/upstream/binutils.git
9 years agogdb.base/dso2dso.exp: Improve testcase documentation.
Joel Brobecker [Wed, 12 Aug 2015 20:40:54 +0000 (13:40 -0700)]
gdb.base/dso2dso.exp: Improve testcase documentation.

gdb/testsuite/ChangeLog:

        * gdb.base/dso2dso.exp: Improve the testcase's documentation.

9 years agoFix Python frame unwinder issue caught by Valgrind
Pedro Alves [Thu, 13 Aug 2015 17:56:42 +0000 (18:56 +0100)]
Fix Python frame unwinder issue caught by Valgrind

Valgrind shows:

 ==17026== Invalid write of size 8
 ==17026==    at 0x54AA80: pending_frame_invalidate (py-unwind.c:477)
 ==17026==    by 0x5AB934: do_my_cleanups (cleanups.c:155)
 ==17026==    by 0x5AB9AF: do_cleanups (cleanups.c:177)
 ==17026==    by 0x54B009: pyuw_sniffer (py-unwind.c:606)
 ==17026==    by 0x755DAC: frame_unwind_try_unwinder (frame-unwind.c:105)
 ==17026==    by 0x755EEE: frame_unwind_find_by_frame (frame-unwind.c:160)
 ==17026==    by 0x750FFA: compute_frame_id (frame.c:454)
 ==17026==    by 0x753BD6: get_prev_frame_if_no_cycle (frame.c:1781)
 ==17026==    by 0x754292: get_prev_frame_always_1 (frame.c:1955)
 ==17026==    by 0x7542DA: get_prev_frame_always (frame.c:1971)
 ==17026==    by 0x7547BE: get_prev_frame (frame.c:2213)
 ==17026==    by 0x7532BD: unwind_to_current_frame (frame.c:1450)
 ==17026==  Address 0xd27b570 is 16 bytes inside a block of size 32 free'd
 ==17026==    at 0x4A07577: free (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
 ==17026==    by 0x54B276: gdb_Py_DECREF (python-internal.h:185)
 ==17026==    by 0x54B298: py_decref (py-utils.c:34)
 ==17026==    by 0x5AB934: do_my_cleanups (cleanups.c:155)
 ==17026==    by 0x5AB9AF: do_cleanups (cleanups.c:177)
 ==17026==    by 0x54B009: pyuw_sniffer (py-unwind.c:606)
 ==17026==    by 0x755DAC: frame_unwind_try_unwinder (frame-unwind.c:105)
 ==17026==    by 0x755EEE: frame_unwind_find_by_frame (frame-unwind.c:160)
 ==17026==    by 0x750FFA: compute_frame_id (frame.c:454)
 ==17026==    by 0x753BD6: get_prev_frame_if_no_cycle (frame.c:1781)
 ==17026==    by 0x754292: get_prev_frame_always_1 (frame.c:1955)
 ==17026==    by 0x7542DA: get_prev_frame_always (frame.c:1971)
 ==17026==

Simply invalidate the object before releasing it.

gdb/ChangeLog:
2015-08-13  Pedro Alves  <palves@redhat.com>

* python/py-unwind.c (pyuw_sniffer): Install the invalidate
cleanup after the decref cleanup, not before.

9 years agoMass rename `explicit' -> `explicit_loc'.
Keith Seitz [Thu, 13 Aug 2015 16:48:12 +0000 (09:48 -0700)]
Mass rename `explicit' -> `explicit_loc'.

BuildBot reminded me that "explicit" is a reserved keyword in C++.
This patch simply renames all the (illegal) uses of "explicit". This should
fix the build errors with --enable-build-with-cxx bots.

gdb/ChangeLog

* break-catch-throw.c (re_set_exception_catchpoint) Rename
reserved C++ keyword "explicit" to "explicit_loc".
* breakpoint.c (create_overlay_event_breakpoint)
(create_longjmp_master_breakpoint)
(create_std_terminate_master_breakpoint)
(create_exception_master_breakpoint, update_static_tracepoint):
Rename reserved C++ keyword "explicit" to "explicit_loc".
* completer.c (collect_explicit_location_matches)
(explicit_location_completer): Rename reserved C++ keyword
"explicit" to "explicit_loc".
* linespec.c (struct linespec) <explicit>: Rename to "explicit_loc".
(canonicalize_linespec, create_sals_line_offset)
(convert_linespec_to_sals, convert_explicit_location_to_sals)
(event_location_to_sals, decode_objc): Rename reserved C++ keyword
"explicit" to "explicit_loc".
* location.c (struct event_location) <explicit>: Rename to
"explicit_loc".
(initialize_explicit_location, new_explicit_location)
(explicit_location_to_string_internal, explicit_location_to_linespec):
Rename reserved C++ keyword "explicit" to "explicit_loc".
* location.h (explicit_location_to_string)
(explicit_location_to_linespec, initialize_explicit_location)
(new_explicit_location): Rename reserved C++ keyword "explicit"
to "explicit_loc".
* mi/mi-cmd-break.c (mi_cmd_break_insert_1): Rename reserved C++
keyword "explicit" to "explicit_loc".

9 years agoIssue an error for read-only segment with dynamic IFUNC relocations
H.J. Lu [Thu, 13 Aug 2015 11:31:38 +0000 (04:31 -0700)]
Issue an error for read-only segment with dynamic IFUNC relocations

To load an ELF binary with DT_TEXTREL tag, the dynamic linker calls
__mprotect on the read-only segment with PROT_READ|PROT_WRITE before
applying dynamic relocation.  It leads to segfault when performing
IFUNC relocations since the read-only segment has no execute permission.
This patch changes x86 linker to issue an error for read-only segment
with dynamic IFUNC relocations.  Other backends with IFUNC support
may need a similar change.

bfd/

PR ld/18801
* elf32-i386.c (elf_i386_size_dynamic_sections): Issue an error
for read-only segment with dynamic IFUNC relocations.
* elf64-x86-64.c (elf_x86_64_size_dynamic_sections): Likewise.

ld/testsuite/

PR ld/18801
* ld-i386/i386.exp: Run pr18801.
* ld-x86-64/x86-64.exp: Likewise.
* ld-i386/pr18801.d: New file.
* ld-i386/pr18801.s: Likewise.
* ld-x86-64/pr18801.d: Likewise.
* ld-x86-64/pr18801.s: Likewise.

9 years agoFixes for unpredictable nops and 26-bit versions of teq,tst,cmn,cmp.
Andre Vieira [Thu, 13 Aug 2015 10:39:08 +0000 (11:39 +0100)]
Fixes for unpredictable nops and 26-bit versions of teq,tst,cmn,cmp.

opcodes * arm-dis.c (print_insn_arm): Disassembling for all targets V6
and higher with ARM instruction set will now mark the 26-bit
versions of teq,tst,cmn and cmp as UNPREDICTABLE.
(arm_opcodes): Fix for unpredictable nop being recognized as a teq.

test    * gas/arm/nops.d: New.
* gas/arm/nops.s: New.
* gas/arm/inst.d: Changed expectation file for 26-bit  teq,
tst, cmn and cmp.

9 years agoAdd ChangeLog for check_ifunc_attribute_available
H.J. Lu [Thu, 13 Aug 2015 09:48:55 +0000 (02:48 -0700)]
Add ChangeLog for check_ifunc_attribute_available

9 years agoAdd ChangeLog entries for the previous commit
Pierre-Marie de Rodat [Thu, 13 Aug 2015 07:54:09 +0000 (09:54 +0200)]
Add ChangeLog entries for the previous commit

9 years ago[Ada] Add support for subprogram renamings
Pierre-Marie de Rodat [Wed, 22 Jul 2015 13:30:57 +0000 (15:30 +0200)]
[Ada] Add support for subprogram renamings

Consider the following declaration:

    function Foo (I : Integer) return Integer renames Pack.Bar;

As Foo is not materialized as a routine whose name is derived from Foo,
GDB currently cannot use it:

    (gdb) print foo(0)
    No definition of "foo" in current context.

However, compilers can emit DW_TAG_imported_declaration in order to
materialize the fact that Foo is actually another name for Pack.Bar.
This commit enhances the DWARF reader to record global renamings (it
used to put global ones in a static block) and enhances the Ada engine
to leverage this information during symbol lookup.

gdb/ChangeLog:

* ada-lang.c: Include namespace.h
(aux_add_nonlocal_symbols): Fix a function name in comment.
(ada_add_block_renamings): New.
(add_nonlocal_symbols): Add global renamings handling.
(ada_lookup_symbol_list_worker): Move the symbol lookup part
to...
(ada_add_all_symbols): ... this new function.
(ada_add_block_symbols): Try to match the input name against the
"using directives list", perform a recursive symbol lookup on
the matched declarations.
* block.h (struct block): Move the_namespace to top-level as
namespace_info. Remove the language_specific field.
(BLOCK_NAMESPACE): Update access to the namespace_info field.
* buildsym.h (using_directives): Rename into...
(local_using_directives): ... this.
(global_using_directives): New.
(struct context_stack): Rename the using_directives field into
local_using_directives.
* buildsym.c (finish_block_internal): Deal with the proper
using directives repository (local or global).
(prepare_for_building): Reset local_using_directives. Assert
that there is no pending global using directive.
(reset_symtab_globals): Reset global_using_directives and
local_using_directives.
(end_symtab_get_static_block): Don't ignore symtabs that have
only using directives.
(push_context): Update references to local_using_directives.
(buildsym_init): Do not reset using_directives.
* cp-support.c: Include namespace.h.
* cp-support.h (struct using_direct): Move to namespace.h.
(cp_add_using_directives): Move to namespace.h.
* cp-namespace.c: Include namespace.h
(cp_add_using_directive): Move to namespace.c, rename it to
add_using_directive, add a "using_directives" argument and use
it as the pending using directives repository.  All callers
updated.
* dwarf2read.c (using_directives): New.
(read_import_statement): Call using_directives.
(read_func_scope): Update references to local_using_directives.
(read_lexical_block_scope): Likewise.
(read_namespace): Update the heading comment, call
using_directives.
* namespace.h: New file.
* namespace.c: New file.
* Makefile.in (SFILES): Add namespace.c.
(COMMON_OBS): Add namespace.o

gdb/testsuite/ChangeLog:

* gdb.ada/fun_renaming.exp: New testcase.
* gdb.ada/fun_renaming/fun_renaming.adb: New file.
* gdb.ada/fun_renaming/pack.adb: New file.
* gdb.ada/fun_renaming/pack.ads: New file.

Tested on x86_64-linux.  Support for this in GCC is in the pipeline: see
<https://gcc.gnu.org/ml/gcc-patches/2015-07/msg02166.html>.

9 years agogas 0f handling
Alan Modra [Thu, 13 Aug 2015 06:27:15 +0000 (15:57 +0930)]
gas 0f handling

_start:
 .byte 0f-_start
0:

Fixes
..:2: Error: floating point number invalid
..:2: Error: junk at end of line, first unrecognized character is `_'

* expr.c (operand): Rewrite handling of operands starting with "0f".
If atof_generic only parses "-" or "+", treat as expression.

9 years agogas 0b vs 0b0 vs 00b
Alan Modra [Thu, 13 Aug 2015 06:25:31 +0000 (15:55 +0930)]
gas 0b vs 0b0 vs 00b

* expr.c (integer_constant): Return O_absent expression if eol.
(operand): For targets with both LOCAL_LABELS_FB and
NUMBERS_WITH_SUFFIX set, treat "0b" not followed by binary
digits as a local label reference.  Correct handling of 0b prefix.
If a suffix is not allowed, error on 0B.

9 years agoCorrect local label doc
Alan Modra [Thu, 13 Aug 2015 06:21:51 +0000 (15:51 +0930)]
Correct local label doc

* doc/as.texinfo (Local Labels): Allowed range of N in local
labels is non-negative integers, not positive integers.

9 years agogdb.base/dso2dso.exp sometimes broken
Keith Seitz [Thu, 13 Aug 2015 01:31:11 +0000 (18:31 -0700)]
gdb.base/dso2dso.exp sometimes broken

Keith reported that gdb.base/dso2dso.exp is broken, with the following
error:

| $ make check RUNTESTFLAGS=dso2dso.exp
| [snip]
| Running ../../../src/gdb/testsuite/gdb.base/dso2dso.exp ...
| ERROR: tcl error sourcing ../../../src/gdb/testsuite/gdb.base/dso2dso.exp.
| ERROR: couldn't open
| "../../../src/gdb/testsuite/gdb.base/../../../src/gdb/testsuite/gdb.base/dso2dso-dso1.c":
| no such file or directory
|     while executing
| "error "$message""
|     (procedure "gdb_get_line_number" line 14)
|     invoked from within
| "gdb_get_line_number "STOP HERE" $srcfile_libdso1"
|     (file "../../../src/gdb/testsuite/gdb.base/dso2dso.exp" line 60)
|     invoked from within
| "source ../../../src/gdb/testsuite/gdb.base/dso2dso.exp"
|     ("uplevel" body line 1)
|     invoked from within
| "uplevel #0 source ../../../src/gdb/testsuite/gdb.base/dso2dso.exp"
|     invoked from within
| "catch "uplevel #0 source $test_file_name""

This happens because gdb_get_line_number will prepend $srcdir/$subdir
if the given filename does not start with "/", and this happens when
GDB was configured using a relative path to the configure script.
When using an absolute path like I do, we avoid the pre-pending that
Keith is seeing.

gdb/testsuite/ChangeLog:

        Keith Seitz  <keiths@redhat.com>:
        * gdb.base/dso2dso.exp: Pass basename of source file in call
        to gdb_get_line_number.

Tested on x86_64-linux with both scenarios.

9 years agoAutomatic date update in version.in
GDB Administrator [Thu, 13 Aug 2015 00:00:08 +0000 (00:00 +0000)]
Automatic date update in version.in

9 years agoSet EI_OSABI to ELFOSABI_GNU for local IFUNC symbols
H.J. Lu [Wed, 12 Aug 2015 20:31:29 +0000 (13:31 -0700)]
Set EI_OSABI to ELFOSABI_GNU for local IFUNC symbols

Since the backend elf_add_symbol_hook isn't called on local symbols,
the EI_OSABI field isn't to ELFOSABI_GNU where are local IFUNC symbols.
This patch changes the x86 backends to set has_gnu_symbols if there are
relocations against IFUNC symbols.  Other backends with IFUNC support
may need a similar change.

This patch also changes the type of has_gnu_symbols from bfd_boolean to
enum elf_gnu_symbols.

bfd/

PR ld/18815
* elf-bfd.h (elf_gnu_symbols): New enum.
(elf_obj_tdata): Use elf_gnu_symbols on has_gnu_symbols.
* elf-s390-common.c (elf_s390_add_symbol_hook): Set
has_gnu_symbols to elf_gnu_symbol_any.
* elf32-arm.c (elf32_arm_add_symbol_hook): Likewise.
* elf32-m68k.c (elf_m68k_add_symbol_hook): Likewise.
* elf32-ppc.c (ppc_elf_add_symbol_hook): Likewise.
* elf32-sparc.c (elf32_sparc_add_symbol_hook): Likewise.
* elf64-ppc.c (ppc64_elf_add_symbol_hook): Likewise.
* elf64-sparc.c (elf64_sparc_add_symbol_hook): Likewise.
* lfxx-aarch64.c (_bfd_aarch64_elf_add_symbol_hook): Likewise.
* elf32-i386.c (elf_i386_check_relocs): Update has_gnu_symbols
if there are relocations against IFUNC symbols.
(elf_i386_add_symbol_hook): Don't check STT_GNU_IFUNC here.
* elf64-x86-64. (elf_x86_64_check_relocs): Update has_gnu_symbols
if there are relocations against IFUNC symbols.
(elf_x86_64_add_symbol_hook): Don't check STT_GNU_IFUNC here.

ld/testsuite/

PR ld/18815
* ld-i386/i386.exp: Run pr18815.
* ld-x86-64/x86-64.exp: Likewise.
* ld-i386/pr18815.d: New file.
* ld-i386/pr18815.s: Likewise.
* ld-x86-64/pr18815.d: Likewise.
* ld-x86-64/pr18815.s: Likewise.

9 years ago[amd64] Invalid return address after displaced stepping
Joel Brobecker [Wed, 12 Aug 2015 16:33:19 +0000 (09:33 -0700)]
[amd64] Invalid return address after displaced stepping

Making all-stop run on top of non-stop caused a small regression
in behavior. This was observed on x86_64-linux. The attached testcase
is in C whereas the investigation was done with an Ada program,
but it's the same scenario, and using a C testcase allows wider testing.
Basically: I am debugging a single-threaded program, and currently
stopped inside a function provided by a shared-library, at a line
calling a subprogram provided by a second shared library, and trying
to "next" over that function call.

Before we changed the default all-stop behavior, we had:

    7             Impl_Initialize;  -- Stop here and try "next" over this line
    (gdb) n
    8             return 5;  <<-- OK

But now, "next" just stops much earlier:

    (gdb) n
    0x00007ffff7bd8560 in impl.initialize@plt () from /[...]/lib/libpck.so

What happens is that next stops at a call instruction, which calls
the function's PLT, and GDB fails to notice that the inferior stepped
into a subroutine, and so decides that we're done. We can see another
symptom of the same issue by looking at the backtrace at the point
GDB stopped:

    (gdb) bt
    #0  0x00007ffff7bd8560 in impl.initialize@plt ()
       from /[...]/lib/libpck.so
    #1  0x00000000f7bd86f9 in ?? ()
    #2  0x00007fffffffdf50 in ?? ()
    #3  0x0000000000401893 in a () at /[...]/a.adb:7
    Backtrace stopped: frame did not save the PC

With a functioning GDB, the backtrace looks like the following instead:

    #0  0x00007ffff7bd8560 in impl.initialize@plt ()
       from /[...]/lib/libpck.so
    #1  0x00007ffff7bd86f9 in sub () at /[...]/pck.adb:7
    #2  0x0000000000401893 in a () at /[...]/a.adb:7

Note how, for frame #1, the address looks quite similar, except
for the high-order bits not being set:

    #1  0x00007ffff7bd86f9 in sub () at /[...]/pck.adb:7   <<<--  OK
    #1  0x00000000f7bd86f9 in ?? ()                        <<<--  WRONG
              ^^^^
              ||||
              Wrong

Investigating this further led me to displaced stepping.
As we are "next"-ing from a location where a breakpoint is inserted,
we need to step out of it, and since we're on non-stop mode, we need
to do it using displaced stepping. And looking at
amd64-tdep.c:amd64_displaced_step_fixup, I found the code that handles
the return address:

    regcache_cooked_read_unsigned (regs, AMD64_RSP_REGNUM, &rsp);
    retaddr = read_memory_unsigned_integer (rsp, retaddr_len, byte_order);
    retaddr = (retaddr - insn_offset) & 0xffffffffUL;

The mask used to compute retaddr looks wrong to me, keeping only
4 bytes instead of 8, and explains why the high order bits of
the backtrace are unset. What happens is that, after the displaced
stepping has completed, GDB restores that return address at the location
where the program expects it.  But because the top half bits of
the address have been masked out, the return address is now invalid.
The incorrect behavior of the "next" command and the backtrace at
that location are the first symptoms of that.  Another symptom is
that this actually alters the behavior of the program, where a "cont"
from there soon leads to a SEGV when the inferior tries to jump back
to that incorrect return address:

    (gdb) c
    Continuing.

    Program received signal SIGSEGV, Segmentation fault.
    0x00000000f7bd86f9 in ?? ()
    ^^^^^^^^^^^^^^^^^^

This patch fixes the issue by using a mask that seems more appropriate
for this architecture.

gdb/ChangeLog:

        * amd64-tdep.c (amd64_displaced_step_fixup): Fix the mask used to
        compute RETADDR.

gdb/testsuite/ChangeLog:

        * gdb.base/dso2dso-dso2.c, gdb.base/dso2dso-dso2.h,
        gdb.base/dso2dso-dso1.c, gdb.base/dso2dso-dso1.h, gdb.base/dso2dso.c,
        gdb.base/dso2dso.exp: New files.

Tested on x86_64-linux, no regression.

9 years agoInitialize `location' in gdbpy_decode_line
Keith Seitz [Wed, 12 Aug 2015 18:31:24 +0000 (11:31 -0700)]
Initialize `location' in gdbpy_decode_line

BuildBot flagged an uninitialized variable coming from one of the patches
in my recently committed locations/explicit patchset.

The following patch fixes this.

gdb/ChangeLog

* python/python.c (gdbpy_decode_line): Initialize `location' to NULL
and only call decode_line_1 when it is non-NULL.

diff --git a/gdb/python/python.c b/gdb/python/python.c
index c28f98b..14da62c 100644
--- a/gdb/python/python.c
+++ b/gdb/python/python.c
@@ -730,7 +730,7 @@ gdbpy_decode_line (PyObject *self, PyObject *args)
   PyObject *result = NULL;
   PyObject *return_result = NULL;
   PyObject *unparsed = NULL;
-  struct event_location *location;
+  struct event_location *location = NULL;

   if (! PyArg_ParseTuple (args, "|s", &arg))
     return NULL;
@@ -747,7 +747,7 @@ gdbpy_decode_line (PyObject *self, PyObject *args)

   TRY
     {
-      if (arg)
+      if (location != NULL)
  sals = decode_line_1 (location, 0, 0, 0);
       else
  {

9 years agoxtensa: add --auto-litpools option
Max Filippov [Wed, 29 Jul 2015 14:42:54 +0000 (17:42 +0300)]
xtensa: add --auto-litpools option

Auto-litpools is the automated version of text-section-literals: literal
pool candidate frags are planted every N frags and during relaxation
they are turned into actual literal pools where literals are moved to
become reachable for their first reference by L32R instruction.

2015-08-12  David Weatherford  <weath@cadence.com>
gas/
* config/tc-xtensa.c (struct litpool_frag, struct litpool_seg):
New structures.
(xtensa_maybe_create_literal_pool_frag): New function.
(litpool_seg_list, auto_litpools, auto_litpool_limit)
(litpool_buf, litpool_slotbuf): New static variables.
(option_auto_litpools, option_no_auto_litpools)
(option_auto_litpool_limit): New enum identifiers.
(md_longopts): Add entries for auto-litpools, no-auto-litpools
and auto-litpool-limit.
(md_parse_option): Handle option_auto_litpools,
option_no_auto_litpools and option_auto_litpool_limit.
(md_show_usage): Add help for --[no-]auto-litpools and
--auto-litpool-limit.
(xtensa_mark_literal_pool_location): Record a place for literal
pool with a call to xtensa_maybe_create_literal_pool_frag.
(get_literal_pool_location): Find highest priority literal pool
or convert candidate to literal pool when auto-litpools are used.
(xg_assemble_vliw_tokens): Create literal pool after jump
instruction.
(xtensa_check_frag_count): Create candidate literal pool every
auto_litpool_limit frags.
(xtensa_relax_frag): Add jump around literals to non-empty
literal pool.
(xtensa_move_literals): Estimate literal pool addresses and move
unreachable literals closer to their users, converting candidate
to literal pool if needed.
(xtensa_switch_to_non_abs_literal_fragment): Only emit error
about missing .literal_position in case auto-litpools are not
used.
* config/tc-xtensa.h (xtensa_relax_statesE): New relaxation
state: RELAX_LITERAL_POOL_CANDIDATE_BEGIN.
* doc/as.texinfo (Xtensa options):  Document --auto-litpools and
--no-auto-litpools options.
* doc/c-xtensa.texi (Xtensa options): Likewise.

2015-08-12  Max Filippov  <jcmvbkbc@gmail.com>
gas/testsuite/
* gas/xtensa/all.exp: Add auto-litpools to the list of xtensa
tests.
* gas/xtensa/auto-litpools.s: New file: auto-litpools test.
* gas/xtensa/auto-litpools.s: New file: auto-litpools test
result pattern.

9 years agoGuarantee save-and-restore of GDBFLAGS on gdb.base/checkpoint-ns.exp
Sergio Durigan Junior [Wed, 12 Aug 2015 16:32:16 +0000 (12:32 -0400)]
Guarantee save-and-restore of GDBFLAGS on gdb.base/checkpoint-ns.exp

Keith found out that several tests were failing when testing the
native-gdbserver board on Fedora (x86_64).  Strangely, these failures
had not been reported by our BuildBot.  Later, he found that the reason
for this was because the failures only happened when running the
testsuite without FORCE_PARALLEL (i.e., on serial mode; maybe it would
be worth having a builder testing things on serial...).  Then, he
decided to start bisecting the changes to see which one introduced the
failure (it was not trivial to know this only by looking at gdb.log).

After a lot of time, he found that Pedro's commit
e1316e60d4d1fe406efc6e7536b2bdb43733e9d2 was the culprit.  There was
nothing wrong in the code, but the new gdb.base/checkpoint-ns.exp
testcase did something that left the GDBFLAGS variable in an
inconsistent state.  This test works by modifying this variable to set
non-stop on, sourcing gdb.base/checkpoint.exp (which does the hard
work), and then restoring the old value on GDBFLAGS.  However, this was
not working because gdb.base/checkpoint.exp bails out if it is being
tested on gdbserver, and when it calls "continue" the control goes back
to the function calling the tests, and not to
gdb.base/checkpoint-ns.exp.

The fix is simple: just wrap the "source" call, and make
gdb.base/checkpoint-ns.exp aware of the "continue"/"return" calls made
by gdb.base/checkpoint.exp.

gdb/testsuite/ChangeLog:
2015-08-12  Sergio Durigan Junior  <sergiodj@redhat.com>
    Pedro Alves  <palves@redhat.com>
    Keith Seitz  <keiths@redhat.com>

* gdb.base/checkpoint-ns.exp: Use save_vars to save and restore
GDBFLAGS.

9 years ago[MIPS] Map 'move' to 'or'.
Simon Dardis [Wed, 12 Aug 2015 16:06:35 +0000 (17:06 +0100)]
[MIPS] Map 'move' to 'or'.

The MIPS assembly idiom 'move' now maps to the 'or' machine instruction. This
change affects microMIPS, MIPS32, MIPS64.

2015-08-12  Simon Dardis  <simon.dardis@imgtec.com>

opcodes/

* micromips-opc.c (micromips_opcodes): Re-order table so that move
based on 'or' is first.
* mips-opc.c (mips_builtin_opcodes): Ditto.

bfd/

* elfxx-mips.c (STUB_MOVE): Change to use 'or' only.
(mips_o32_exec_plt0_entry, mips_n32_exec_plt0_entry,
mips_n64_exec_plt0_entry, micromips_insn32_o32_exec_plt0_entry):
Update to use 'or' instead of 'addu/daddu'.
(_bfd_mips_elf_finish_dynamic_symbol): Update usage of STUB_MOVE.
(move_insns_32): Reorder table.

gas/

* config/tc-mips.c (move_register): Change to use 'or' only.
(s_cpload, s_cpsetup, s_cprestore, s_cpreturn): Update to
use or for move.

gas/testsuite/

* gas/mips/elf-rel23.d: Update test.
* gas/mips/elf-rel23.d: Ditto.
* gas/mips/elf-rel23a.d: Ditto.
* gas/mips/elf-rel23b.d: Ditto.
* gas/mips/elf_e_flags1.d: Ditto.
* gas/mips/elf_e_flags2.d: Ditto.
* gas/mips/elf_e_flags3.d: Ditto.
* gas/mips/elf_e_flags4.d: Ditto.
* gas/mips/loc-swap-dis.d: Ditto.
* gas/mips/micromips-insn32.d: Ditto.
* gas/mips/micromips-noinsn32.d: Ditto.
* gas/mips/micromips-trap.d: Ditto.
* gas/mips/micromips.d: Ditto.
* gas/mips/mips-abi32-pic.d: Ditto.
* gas/mips/mips-abi32.d: Ditto.
* gas/mips/mips-gp32-fp32-pic.d: Ditto.
* gas/mips/mips-gp32-fp32.d: Ditto.
* gas/mips/mips-gp32-fp64-pic.d: Ditto.
* gas/mips/mips-gp32-fp64.d: Ditto.
* gas/mips/mips-gp64-fp32-pic.d: Ditto.
* gas/mips/mips-gp64-fp32.d: Ditto.
* gas/mips/mips-gp64-fp64-pic.d: Ditto.
* gas/mips/mips-gp64-fp64.d: Ditto.
* gas/mips/mipsr6@loc-swap-dis.d: Ditto.
* gas/mips/tls-o32.d: Ditto.
* gas/mips/uld2-eb.d: Ditto.
* gas/mips/uld2-el.d: Ditto.
* gas/mips/ulw2-eb-ilocks.d: Ditto.
* gas/mips/ulw2-eb.d: Ditto.
* gas/mips/ulw2-el-ilocks.d: Ditto.
* gas/mips/ulw2-el.d: Ditto.
* gas/mips/move.d: New test.
* gas/mips/move.s: Ditto.
* gas/mips/micromips32-move.d: Ditto.
* gas/mips/micromips32-move.s: Ditto.
* gas/mips/mips.exp: Run the new tests.

gold/

* mips.cc (plt0_entry_o32, plt0_entry_n32, plt0_entry_n64,
lazy_stub_normal_1, lazy_stub_normal_1_n64,
lazy_stub_normal_2, lazy_stub_normal_2_n64, lazy_stub_big,
lazy_stub_big_n64, lazy_stub_micromips32_normal_1_n64,
lazy_stub_micromips32_normal_2_n64, lazy_stub_micromips32_big,
lazy_stub_micromips32_big_n64): Update to use 'or' for move instead
of 'addu/daddu'.

ld/testsuite/

* ld-mips-elf/compressed-plt-1-n32-mips16.od: Update test.
* ld-mips-elf/compressed-plt-1-n32-umips.od: Ditto.
* ld-mips-elf/compressed-plt-1-o32-mips16-got.od: Ditto.
* ld-mips-elf/compressed-plt-1-o32-mips16-only.od: Ditto.
* ld-mips-elf/compressed-plt-1-o32-mips16-word.od: Ditto.
* ld-mips-elf/compressed-plt-1-o32-mips16.od: Ditto.
* ld-mips-elf/compressed-plt-1-o32-se.od: Ditto.
* ld-mips-elf/compressed-plt-1-o32-umips-got.od: Ditto.
* ld-mips-elf/compressed-plt-1-o32-umips-word.od: Ditto.
* ld-mips-elf/compressed-plt-1-o32-umips.od: Ditto.
* ld-mips-elf/jalx-2.dd: Ditto.
* ld-mips-elf/mips16-pic-3.dd: Ditto.
* ld-mips-elf/pic-and-nonpic-3a.dd: Ditto.
* ld-mips-elf/pic-and-nonpic-3b.dd: Ditto.
* ld-mips-elf/pic-and-nonpic-5b.dd: Ditto.
* ld-mips-elf/pic-and-nonpic-6-n32.dd: Ditto.
* ld-mips-elf/pic-and-nonpic-6-o32.dd: Ditto.
* ld-mips-elf/stub-dynsym-1-10000.d: Ditto.
* ld-mips-elf/stub-dynsym-1-2fe80.d: Ditto.
* ld-mips-elf/stub-dynsym-1-7fff.d: Ditto.
* ld-mips-elf/stub-dynsym-1-8000.d: Ditto.
* ld-mips-elf/stub-dynsym-1-fff0.d: Ditto.
* ld-mips-elf/tlsbin-o32.d: Ditto.
* ld-mips-elf/tlsdyn-o32-1.d: Ditto.
* ld-mips-elf/tlsdyn-o32-2.d: Ditto.
* ld-mips-elf/tlsdyn-o32-3.d: Ditto.
* ld-mips-elf/tlsdyn-o32.d: Ditto.
* ld-mips-elf/tlslib-o32.d: Ditto.

9 years agoUse save_vars to replace existing manipulation of globals in tests
Patrick Palka [Fri, 19 Jun 2015 01:47:55 +0000 (21:47 -0400)]
Use save_vars to replace existing manipulation of globals in tests

gdb/testsuite/ChangeLog:

* gdb.base/gdbhistsize-history.exp
(test_histsize_history_setting): Use save_vars.
* gdb.base/gdbinit-history.exp (test_gdbinit_history_setting):
Use save_vars.
(test_no_truncation_of_unlimited_history_file): Use save_vars.
* gdb.base/readline.exp: Use save_vars.

9 years agoRemove ChangeLog separator
Alan Modra [Wed, 12 Aug 2015 09:36:01 +0000 (19:06 +0930)]
Remove ChangeLog separator

9 years agoIntroduce save_vars, a testsuite proc for safely manipulating globals
Patrick Palka [Fri, 19 Jun 2015 01:33:26 +0000 (21:33 -0400)]
Introduce save_vars, a testsuite proc for safely manipulating globals

gdb/testsuite/ChangeLog:

* lib/gdb.exp (save_vars): New proc.

9 years ago[AArch64] Fix test failures on elf configuration
Jiong Wang [Wed, 12 Aug 2015 12:17:50 +0000 (13:17 +0100)]
[AArch64] Fix test failures on elf configuration

This patch fixed those failures on elf configuration by:

   * Improve the ILP32 target selector "aarch64_choose_ilp32_emul",
     makes it more robust. Target triples copied from configure.tgt

   * Updated emit-relocs-86/-overflow.d to use aarch64_choose_ilp32_emul
     which is following what have done with emit-relocs-28.

   * Those instruction encoding mismatch is because those encoding
     contains pc-relative address. As for elf, we may have different
     start address. relaxed encodind check, especially for
     aarch64-farcall-b/bl-plt, as the main purpose of those check are
     ELF text/data layout, we just want to make sure veneer to plt stub
     is generated.

2015-08-12  Jiong Wang  <jiong.wang@arm.com>

ld/testsuite/
  * ld-aarch64/aarch64-elf.exp (aarch64_choose_ilp32_emul): Support all
  four triple shapes: aarch64-*-linux*, aarch64-*-elf,
  aarch64_be-*-linux*, aarch64_be-*-elf.
  * ld-aarch64/emit-relocs-86.d: Use aarch64_choose_ilp32_emul.
  * ld-aarch64/emit-relocs-86-overflow.d: Likewise.
  * ld-aarch64/ld-aarch64/farcall-b-plt.d: Relax instrucion encoding
  check when they reflect address.
  * ld-aarch64/ld-aarch64/farcall-bl-plt.d: Likewise.

9 years agoSync ansidecl.h with GCC
H.J. Lu [Wed, 12 Aug 2015 12:02:21 +0000 (05:02 -0700)]
Sync ansidecl.h with GCC

Sync with GCC
2015-08-11  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>

* ansidecl.h (GCC_FINAL): New macro.

9 years agoRemove trailing spaces in ld
H.J. Lu [Wed, 12 Aug 2015 11:46:43 +0000 (04:46 -0700)]
Remove trailing spaces in ld

9 years agoRemove trailing spaces in opcodes
H.J. Lu [Wed, 12 Aug 2015 11:45:07 +0000 (04:45 -0700)]
Remove trailing spaces in opcodes

9 years agoRemove trailing spaces in gprof
H.J. Lu [Wed, 12 Aug 2015 11:43:32 +0000 (04:43 -0700)]
Remove trailing spaces in gprof

9 years agoRemove trailing spaces in binutils
H.J. Lu [Wed, 12 Aug 2015 11:42:37 +0000 (04:42 -0700)]
Remove trailing spaces in binutils

9 years agoRemove trailing spaces in gas
H.J. Lu [Wed, 12 Aug 2015 11:40:42 +0000 (04:40 -0700)]
Remove trailing spaces in gas

9 years agoRemove trailing spaces in bfd
H.J. Lu [Wed, 12 Aug 2015 11:32:43 +0000 (04:32 -0700)]
Remove trailing spaces in bfd

9 years agoUpdate Swedish translation in gprof.
Nick Clifton [Wed, 12 Aug 2015 10:50:26 +0000 (11:50 +0100)]
Update Swedish translation in gprof.

* po/sv.po: Updated Swedish translation.

9 years ago[regression] Do not read from catchpoint/watchpoint locations' addresses when checkin...
Luis Machado [Wed, 12 Aug 2015 08:36:09 +0000 (05:36 -0300)]
[regression] Do not read from catchpoint/watchpoint locations' addresses when checking for a permanent breakpoint

While running bare-metal tests with GDB i noticed some failures in
gdb.base/break.exp, related to the use of the catch commands.

It turns out GDB tries to access memory address 0x0 whenever one tries
to insert a catchpoint, which should obviously not happen.

This was introduced with the changes for permanent breakpoints. In special,
bp_loc_is_permanent tries to check if there is a breakpoint inserted at
the same address as the current breakpoint's location's address. In the
case of catchpoints, this is 0x0.

(top-gdb) catch fork
Sending packet: $m0,1#fa...Packet received: E01
Catchpoint 4 (fork)

(top-gdb) catch vfork
Sending packet: $m0,1#fa...Packet received: E01
Catchpoint 5 (vfork)

It is not obvious to detect because this fails silently for Linux. For our
bare-metal testing, though, this fails with a clear error message from the
target about not being able to read such address.

The attached patch addresses this by bailing out of bp_loc_is_permanent (...)
if the location address is not meaningful. I also took the opportunity to
update the comment for breakpoint_address_is_meaningful, which mentioned
breakpoint addresses as opposed to their locations' addresses.

gdb/ChangeLog:

2015-08-11  Luis Machado  <lgustavo@codesourcery.com>

* breakpoint.c (bp_loc_is_permanent): Return 0 when breakpoint
location address is not meaningful.
(breakpoint_address_is_meaningful): Update comment.

9 years agoProperly skip IFUNC relocations in debug sections
H.J. Lu [Wed, 12 Aug 2015 02:04:38 +0000 (19:04 -0700)]
Properly skip IFUNC relocations in debug sections

Use "continue" instead of "break" to skip IFUNC relocations in debug
sections.

* elf32-i386.c (elf_i386_relocate_section): Properly skip IFUNC
relocations in debug sections.
* elf64-x86-64.c (elf_x86_64_relocate_section): Likewise.

9 years ago[AArch64] Rename relocs-257-symbolic-func ld test to relocs-1027-symbolic-func.
Thomas Preud'homme [Wed, 12 Aug 2015 01:31:04 +0000 (09:31 +0800)]
[AArch64] Rename relocs-257-symbolic-func ld test to relocs-1027-symbolic-func.

2015-08-12  Thomas Preud'homme  <thomas.preudhomme@arm.com>

ld/testsuite/
    * ld-aarch64/aarch64-elf.exp: Rename relocs-257-symbolic-func to
    relocs-1027-symbolic-func.
    * ld-aarch64/relocs-257-symbolic-func.d: Rename to ...
    * ld-aarch64/relocs-1027-symbolic-func.d: ... this.
    * ld-aarch64/relocs-257-symbolic-func.s: Rename to ...
    * ld-aarch64/relocs-1027-symbolic-func.s: ... this.

9 years agoExplicit locations: documentation updates
Keith Seitz [Wed, 12 Aug 2015 00:09:36 +0000 (17:09 -0700)]
Explicit locations: documentation updates

This patch adds documentation for explicit locations to both the
User Manual and gdb's online help system.

gdb/ChangeLog:

* NEWS: Mention explicit locations.
* breakpoint.c [LOCATION_HELP_STRING]: New macro.
[BREAK_ARGS_HELP]: Use LOCATION_HELP_STRING.
(_initialize_breakpoint): Update documentation for
"clear", "break", "trace", "strace", "ftrace", and "dprintf".

gdb/doc/ChangeLog:

* gdb.texinfo (Thread-Specific Breakpoints, Printing Source Lines):
Use "location(s)"instead of "linespec(s)".
(Specifying a Location): Rewrite.
Add subsections describing linespec, address, and explicit locations.
Add node/menu for each subsection.
(Source and Machine Code, C Preprocessor Macros)
(Create and Delete Trace points)
(Extensions for Ada Tasks): Use "location(s)" instead of "linespec(s)".
(Continuing at a Different Address): Remove "linespec" examples.
Add reference to "Specify a Location"
(The -break-insert Command): Rewrite.  Add anchor.
Add reference to appropriate manual section discussing locations.
(The -dprintf-insert Command): Refer to -break-insert for
specification of 'location'.

gdb/testsuite/ChangeLog:

* gdb.base/help.exp: Update help_breakpoint_text.

9 years agoExplicit locations: MI support for explicit locations
Keith Seitz [Wed, 12 Aug 2015 00:09:36 +0000 (17:09 -0700)]
Explicit locations: MI support for explicit locations

This patch adds support for explicit locations to MI's -break-insert
command. The new options, documented in the User Manual, are
--source, --line, --function, and --label.

gdb/ChangeLog:

* mi/mi-cmd-break.c (mi_cmd_break_insert_1): Add support for
explicit locations, options "--source", "--function",
"--label", and "--line".

gdb/testsuite/ChangeLog:

* gdb.mi/mi-break.exp (test_explicit_breakpoints): New proc.
(at toplevel): Call test_explicit_breakpoints.
* gdb.mi/mi-dprintf.exp: Add tests for explicit dprintf
breakpoints.
* lib/mi-support.exp (mi_make_breakpoint): Add support for
breakpoint conditions, "-cond".

9 years agoExplicit locations: add UI features for CLI
Keith Seitz [Wed, 12 Aug 2015 00:09:36 +0000 (17:09 -0700)]
Explicit locations: add UI features for CLI

This patch exposes explicit locations to the CLI user.  This enables
users to "explicitly" specify attributes of the breakpoint location
to avoid any ambiguity that might otherwise exist with linespecs.

The general syntax of explicit locations is:
-source SOURCE_FILENAME -line {+-}LINE -function FUNCTION_NAME
-label LABEL_NAME

Option names may be abbreviated, e.g., "-s SOURCE_FILENAME -li 3" and users
may use the completer with either options or values.

gdb/ChangeLog:

* completer.c: Include location.h.
(enum match_type): New enum.
(location_completer): Rename to ...
(linespec_completer): ... this.
(collect_explicit_location_matches, backup_text_ptr)
(explicit_location_completer): New functions.
(location_completer): "New" function; handle linespec
and explicit location completions.
(complete_line_internal): Remove all location completer-specific
handling.
* linespec.c (linespec_lexer_lex_keyword, is_ada_operator)
(find_toplevel_char): Export.
(linespec_parse_line_offset): Export.
Issue error if STRING is not numerical.
(gdb_get_linespec_parser_quote_characters): New function.
* linespec.h (linespec_parse_line_offset): Declare.
(get_gdb_linespec_parser_quote_characters): Declare.
(is_ada_operator): Declare.
(find_toplevel_char): Declare.
(linespec_lexer_lex_keyword): Declare.
* location.c (explicit_to_event_location): New function.
(explicit_location_lex_one): New function.
(string_to_explicit_location): New function.
(string_to_event_location): Handle explicit locations.
* location.h (explicit_to_event_location): Declare.
(string_to_explicit_location): Declare.

gdb/testsuite/ChangeLog:

* gdb.linespec/3explicit.c: New file.
* gdb.linespec/cpexplicit.cc: New file.
* gdb.linespec/cpexplicit.exp: New file.
* gdb.linespec/explicit.c: New file.
* gdb.linespec/explicit.exp: New file.
* gdb.linespec/explicit2.c: New file.
* gdb.linespec/ls-errs.exp: Add explicit location tests.
* lib/gdb.exp (capture_command_output): Regexp-escape `command'
before using in the matching pattern.
Clarify that `prefix' is a regular expression.

9 years agoExplicit locations: introduce explicit locations
Keith Seitz [Wed, 12 Aug 2015 00:09:35 +0000 (17:09 -0700)]
Explicit locations: introduce explicit locations

This patch add support for explicit locations and switches many linespec
locations to this new location type.  This patch also converts all
linespec locations entered by the user to an explicit representation
internally (thus bypassing the linespec parser when resetting the
breakpoint).

This patch does not introduce any user-visible changes.

gdb/ChangeLog:

* break-catch-throw.c (re_set_exception_catchpoint): Convert
linespec into explicit location.
* breakpoint.c (create_overlay_breakpoint)
(create_longjmp_master_breakpoint)
(create_std_terminate_master_breakpoint)
(create_exception_master_breakpoint): Convert linespec into explicit
location.
(update_static_tracepoint): Convert linespec into explicit location.
* linespec.c (enum offset_relative_sign, struct line_offset): Move
location.h.
(struct linespec) <expression, expr_pc, source_filename>
<function_name, label_name, line_offset>: Replace with ...
<explicit>: ... this.
<is_linespec>: New member.
(PARSER_EXPLICIT): New accessor macro.
(undefined_label_error): New function.
(source_file_not_found_error): New function.
(linespec_parse_basic): The parser result is now an explicit location.
Use PARSER_EXPLICIT to access it.
Use undefined_label_error.
(canonicalize_linespec): Convert canonical linespec into explicit
location.
Move string representation of location to explicit_location_to_linespec
and use it and explicit_location_to_string to save string
representations of the canonical location.
(create_sals_line_offset, convert_linespec_to_sals): `ls' contains an
explicit location.  Update all references.
(convert_explicit_location_to_sals): New function.
(parse_linespec): Use PARSER_EXPLICIT to access the parser
result's explicit location.
(linespec_state_constructor): Initialize is_linespec.
Use PARSER_EXPLICIT.
(linespec_parser_delete): Use PARSER_EXPLICIT to access the parser's
result.
(event_location_to_sals): For linespec locations, set is_linespec.
Handle explicit locations.
(decode_objc): 'ls' contains an explicit location now. Update all
references.
(symtabs_from_filename): Use source_file_not_found_error.
* location.c (struct event_location.u) <explicit>: New member.
(initialize_explicit_location): New function.
(initialize_event_location): Initialize explicit locations.
(new_explicit_location, get_explicit_location)
(get_explicit_location_const): New functions.
(explicit_to_string_internal): New function; most of contents moved
from canonicalize_linespec.
(explicit_location_to_string): New function.
(explicit_location_to_linespec): New function.
(copy_event_location, delete_event_location)
(event_location_to_string_const, event_location_empty_p): Handle
explicit locations.
* location.h (enum offset_relative_sign, struct line_offset): Move
here from linespec.h.
(enum event_location_type): Add EXPLICIT_LOCATION.
(struct explicit_location): New structure.
(explicit_location_to_string): Declare.
(explicit_location_to_linespec): Declare.
(new_explicit_location, get_explicit_locationp
(get_explicit_location_const, initialize_explicit_location): Declare.

9 years agoExplicit locations: introduce probe locations
Keith Seitz [Wed, 12 Aug 2015 00:09:35 +0000 (17:09 -0700)]
Explicit locations: introduce probe locations

This patch adds support for probe locations and converts existing
probe linespec locations to the new location type.

gdb/ChangeLog:

* break-catch-throw.c (re_set_exception_catchpoint): Convert
linespec for stap probe to probe location.
* breakpoint.c (create_longjmp_master_breakpoint)
(create_exception_master_breakpoint): Likewise.
(break_command_1): Remove local variable `arg_cp'.
Check location type to set appropriate breakpoint ops methods.
(trace_command): Likewise.
* linespec.c (event_location_to_sals): Assert on probe locations.
* location.c (EL_PROBE): Add macro definition.
(new_probe_location, get_probe_location): New functions.
(copy_event_location, delete_event_location, event_location_to_string)
(string_to_event_location, event_location_empty_p): Handle probe
locations.
* location.h (enum event_location_type): Add PROBE_LOCATION.
(new_probe_location, get_probe_location): Declare.
* probe.c (parse_probes): Assert that LOCATION is a probe location.
Convert linespec into probe location.

9 years agoExplicit locations: introduce address locations
Keith Seitz [Wed, 12 Aug 2015 00:09:35 +0000 (17:09 -0700)]
Explicit locations: introduce address locations

This patch adds support for address locations, of the form "*ADDR".
[Support for address linespecs has been removed/replaced by this "new"
location type.] This patch also converts any existing address locations
from its previous linespec type.

gdb/ChangeLog:

* breakpoint.c (create_thread_event_breakpoint, init_breakpoint_sal):
Convert linespec to address location.
* linespec.c (canonicalize_linespec): Do not handle address
locations here.
(convert_address_location_to_sals): New function; contents moved
from ...
(convert_linespc_to_sals): ... here.
(parse_linespec): Remove address locations from linespec grammar.
Remove handling of address locations.
(linespec_lex_to_end): Remove handling of address linespecs.
(event_location_to_sals): Handle ADDRESS_LOCATION.
(linespec_expression_to_pc): Export.
* linespec.h (linespec_expression_to_pc): Add declaration.
* location.c (struct event_location.u) <address>: New member.
(new_address_location, get_address_location): New functions.
(copy_event_location, delete_event_location, event_location_to_string)
(string_to_event_location, event_location_empty_p): Handle address
locations.
* location.h (enum event_location_type): Add ADDRESS_LOCATION.
(new_address_location, get_address_location): Declare.
* python/py-finishbreakpoint.c (bpfinishpy_init): Convert linespec
to address location.
* spu-tdep.c (spu_catch_start): Likewise.

9 years agoExplicit locations: use new location API
Keith Seitz [Wed, 12 Aug 2015 00:09:35 +0000 (17:09 -0700)]
Explicit locations: use new location API

This patch converts the code base to use the new struct event_location
API being introduced. This patch preserves the current functionality and
adds no new features.

The "big picture" API usage introduced by this patch may be illustrated
with a simple exmaple. Where previously developers would write:

void
my_command (char *arg, int from_tty)
{
   create_breakpoint (..., arg, ...);
   ...
}

one now uses:

void
my_command (char *arg, int from_tty)
{
   struct event_locaiton *location;
   struct cleanup *back_to;

   location = string_to_event_locaiton (&arg, ...);
   back_to = make_cleanup_delete_event_location (location);
   create_breakpoint (..., location, ...);
   do_cleanups (back_to);
}

Linespec-decoding functions (now called location-decoding) such as
decode_line_full no longer skip argument pointers over processed input.
That functionality has been moved into string_to_event_location as
demonstrated above.

gdb/ChangeLog

* ax-gdb.c: Include location.h.
(agent_command_1) Use linespec location instead of address
string.
* break-catch-throw.c: Include location.h.
(re_set_exception_catchpoint): Use linespec locations instead
of address strings.
* breakpoint.c: Include location.h.
(create_overlay_event_breakpoint, create_longjmp_master_breakpoint)
(create_std_terminate_master_breakpoint)
(create_exception_master_breakpoint, update_breakpoints_after_exec):
Use linespec location instead of address string.
(print_breakpoint_location):  Use locations and
event_location_to_string.
Print extra_string for pending locations for non-MI streams.
(print_one_breakpoint_location): Use locations and
event_location_to_string.
(init_raw_breakpoint_without_location): Initialize b->location.
(create_thread_event_breakpoint): Use linespec location instead of
address string.
(init_breakpoint_sal): Likewise.
Only save extra_string if it is non-NULL and not the empty string.
Use event_location_to_string instead of `addr_string'.
Constify `p' and `endp'.
Use skip_spaces_const/skip_space_const instead of non-const versions.
Copy the location into the breakpoint.
If LOCATION is NULL, save the breakpoint address as a linespec location
instead of an address string.
(create_breakpoint_sal): Change `addr_string' parameter to a struct
event_location. All uses updated.
(create_breakpoints_sal): Likewise for local variable `addr_string'.
(parse_breakpoint_sals): Use locations instead of address strings.
Remove check for empty linespec with conditional.
Refactor.
(decode_static_tracepoint_spec): Make argument const and update
function.
(create_breakpoint): Change `arg' to a struct event_location and
rename.
Remove `copy_arg' and `addr_start'.
If EXTRA_STRING is empty, set it to NULL.
Don't populate `canonical' for pending breakpoints.
Pass `extra_string' to find_condition_and_thread.
Clear `extra_string' if `rest' was NULL.
Do not error with "garbage after location" if setting a dprintf
breakpoint.
Copy the location into the breakpoint instead of an address string.
(break_command_1): Use string_to_event_location and pass this to
create_breakpoint instead of an address string.
Check against `arg_cp' for a probe linespec.
(dprintf_command): Use string_to_event_location and pass this to
create_breakpoint instead of an address string.
Throw an exception if no format string was specified.
(print_recreate_ranged_breakpoint): Use event_location_to_string
instead of address strings.
(break_range_command, until_break_command)
(init_ada_exception_breakpoint): Use locations instead
of address strings.
(say_where): Print out extra_string for pending locations.
(base_breakpoint_dtor): Delete `location' and `location_range_end' of
the breakpoint.
(base_breakpoint_create_sals_from_location): Use struct event_location
instead of address string.
Remove `addr_start' and `copy_arg' parameters.
(base_breakpoint_decode_location): Use struct event_location instead of
address string.
(bkpt_re_set): Use locations instead of address strings.
Use event_location_empty_p to check for unset location.
(bkpt_print_recreate): Use event_location_to_string instead of
an address string.
Print out extra_string for pending locations.
(bkpt_create_sals_from_location, bkpt_decode_location)
  (bkpt_probe_create_sals_from_location): Use struct event_location
instead of address string.
(bkpt_probe_decode_location): Use struct event_location instead of
address string.
(tracepoint_print_recreate): Use event_location_to_string to
recreate the tracepoint.
(tracepoint_create_sals_from_location, tracepoint_decode_location)
(tracepoint_probe_create_sals_from_location)
(tracepoint_probe_decode_location): Use struct event_location
instead of address string.
(dprintf_print_recreate): Use event_location_to_string to recreate
the dprintf.
(dprintf_re_set): Remove check for valid/missing format string.
(strace_marker_create_sals_from_location)
(strace_marker_create_breakpoints_sal, strace_marker_decode_location)
(update_static_tracepoint): Use struct event_location instead of
address string.
(location_to_sals): Likewise.
Pass `extra_string' to find_condition_and_thread.
For newly resolved pending breakpoint locations, clear the location's
string representation.
Assert that the breakpoint's condition string is NULL when
condition_not_parsed.
(breakpoint_re_set_default, create_sals_from_location_default)
(decode_location_default, trace_command, ftrace_command)
(strace_command, create_tracepoint_from_upload): Use locations
instead of address strings.
* breakpoint.h (struct breakpoint_ops) <create_sals_from_location>:
Use struct event_location instead of address string.
Update all uses.
<decode_location>: Likewise.
(struct breakpoint) <addr_string>: Change to struct event_location
and rename `location'.
<addr_string_range_end>: Change to struct event_location and rename
`location_range_end'.
(create_breakpoint): Use struct event_location instead of address
string.
* cli/cli-cmds.c: Include location.h.
(edit_command, list_command): Use locations instead of address strings.
* elfread.c: Include location.h.
(elf_gnu_ifunc_resolver_return_stop): Use event_location_to_string.
* guile/scm-breakpoint.c: Include location.h.
(bpscm_print_breakpoint_smob): Use event_location_to_string.
(gdbscm_register_breakpoint): Use locations instead of address
strings.
* linespec.c: Include location.h.
(struct ls_parser) <stream>: Change to const char *.
(PARSER_STREAM): Update.
(lionespec_lexer_lex_keyword): According to find_condition_and_thread,
keywords must be followed by whitespace.
(canonicalize_linespec): Save a linespec location into `canonical'.
Save a canonical linespec into `canonical'.
(parse_linespec): Change `argptr' to const char * and rename `arg'.
All uses updated.
Update function description.
(linespec_parser_new): Initialize `parser'.
Update initialization of  parsing stream.
(event_location_to_sals): New function.
(decode_line_full): Change `argptr' to a struct event_location and
rename it `location'.
Use locations instead of address strings.
Call event_location_to_sals instead of parse_linespec.
(decode_line_1): Likewise.
(decode_line_with_current_source, decode_line_with_last_displayed)
Use locations instead of address strings.
(decode_objc): Likewise.
Change `argptr' to const char * and rename `arg'.
(destroy_linespec_result): Delete the linespec result's location
instead of freeing the address string.
* linespec.h (struct linespec_result) <addr_string>: Change to
struct event_location and rename to ...
<location>: ... this.
(decode_line_1, decode_line_full): Change `argptr' to struct
event_location.  All callers updated.
* mi/mi-cmd-break.c: Include language.h, location.h, and linespec.h.
(mi_cmd_break_insert_1): Use locations instead of address strings.
Throw an error if there was "garbage" at the end of the specified
linespec.
* probe.c: Include location.h.
(parse_probes): Change `argptr' to struct event_location.
Use event locations instead of address strings.
* probe.h (parse_probes): Change `argptr' to struct event_location.
* python/py-breakpoint.c: Include location.h.
(bppy_get_location): Constify local variable `str'.
Use event_location_to_string.
(bppy_init): Use locations instead of address strings.
* python/py-finishbreakpoint.c: Include location.h.
(bpfinishpy_init): Remove local variable `addr_str'.
Use locations instead of address strings.
* python/python.c: Include location.h.
(gdbpy_decode_line): Use locations instead of address strings.
* remote.c: Include location.h.
(remote_download_tracepoint): Use locations instead of address
strings.
* spu-tdep.c: Include location.h.
(spu_catch_start): Remove local variable `buf'.
Use locations instead of address strings.
* tracepoint.c: Include location.h.
(scope_info): Use locations instead of address strings.
(encode_source_string): Constify parameter `src'.
* tracepoint.h (encode_source_string): Likewise.

gdb/testsuite/ChangeLog

* gdb.base/dprintf-pending.exp: Update dprintf "without format"
test.
Add tests for missing ",FMT" and ",".

9 years agoExplicit locations: introduce new struct event_location-based API
Keith Seitz [Wed, 12 Aug 2015 00:09:35 +0000 (17:09 -0700)]
Explicit locations: introduce new struct event_location-based API

This patch introduces the new breakpoint/"linespec" API based on
a new struct event_location.  This API currently only supports
traditional linespecs, maintaining the status quo of the code base.
Future patches will add additional functionality for other location
types such as address locations.

gdb/ChangeLog:

* Makefile.in (SFILES): Add location.c.
(HFILES_NO_SRCDIR): Add location.h.
(COMMON_OBS): Add location.o.
* linespec.c (linespec_lex_to_end): New function.
* linespec.h (linespec_lex_to_end): Declare.
* location.c: New file.
* location.h: New file.

9 years agoExplicit locations: rename "address string"/"addr_string" to "location"
Keith Seitz [Wed, 12 Aug 2015 00:09:35 +0000 (17:09 -0700)]
Explicit locations: rename "address string"/"addr_string" to "location"

This patch renames all occurrances of "addr_string" and "address
string" in the breakpoint/linespec APIs.  This will emphasize the
change from address strings used in setting breakpoints (et al) to the
new locations-based API introduced in subsequent patches.

gdb/ChangeLog:

* breakpoint.h (struct breakpoint_ops) <create_sals_from_address>:
Renamed to create_sals_from_location.
<decode_linespec>: Renamed to decode_location.
Update all callers.
* breakpoint.c (create_sals_from_address_default): Renamed to ...
(create_sals_from_location_default): ... this.
(addr_string_to_sals): Renamed to ...
(location_to_sals): ... this.
(decode_linespec_default): Renamed to ...
(decode_location_default): ... this.
(base_breakpoint_create_sals_from_address): Renamed to ...
(base_breakpoint_create_sals_from_location): ... this.
(bkpt_create_sals_from_address): Renamed to ...
(bkpt_create_sals_from_location): ... this.
(bkpt_decode_linespec): Renamed to ...
(bkpt_decode_location): ... this.
(bkpt_probe_create_sals_from_address): Renamed to ...
(bkpt_probe_create_sals_from_location): ... this.
(tracepoint_create_sals_from_address): Renamed to ...
(tracepoint_create_sals_from_location): ... this.
(tracepoint_decode_linespec): Renamed to ...
(tracepoint_decode_location): ... this.
(tracepoint_probe_create_sals_from_address): Renamed to ...
(tracepoint_probe_create_sals_from_location): ... this.
(tracepoint_probe_decode_linespec): Renamed to ...
(tracepoint_probe_decode_location): ... this.
(strace_marker_create_sals_from_address): Renamed to ...
(strace_marker_create_sals_from_location): ... this.
(decode_linespec_default): Renamed to ...
(decode_location_default): ... this.

9 years agoAutomatic date update in version.in
GDB Administrator [Wed, 12 Aug 2015 00:00:07 +0000 (00:00 +0000)]
Automatic date update in version.in

9 years ago[AArch64] Improve BFD overflow warning message for -fpic
Jiong Wang [Tue, 11 Aug 2015 21:12:41 +0000 (22:12 +0100)]
[AArch64] Improve BFD overflow warning message for -fpic

2015-08-11  Jiong Wang  <jiong.wang@arm.com>

bfd/
  * elfnn-aarch64.c (elfNN_aarch64_relocate_section): Improve warning
  message for R_AARCH64_LD64_GOTPAGE_LO15/R_AARCH64_LD32_GOTPAGE_LO14.

9 years ago[AArch64] Commit missing testcases
Jiong Wang [Tue, 11 Aug 2015 21:12:08 +0000 (22:12 +0100)]
[AArch64] Commit missing testcases

9 years ago[AArch64]Speed up linking speed by skipping unncessary TLS reloc type check
Jiong Wang [Tue, 11 Aug 2015 21:05:39 +0000 (22:05 +0100)]
[AArch64]Speed up linking speed by skipping unncessary TLS reloc type check

2015-08-11  Jiong Wang  <jiong.wang@arm.com>

bfd/
   * elfnn-aarch64.c (IS_AARCH64_TLS_RELAX_RELOC): New.
  (aarch64_can_relax_tls): Use the new IS_AARCH64_TLS_RELAX_RELOC.

9 years ago[AArch64] Long branch veneer support far symbol defined by --defsym
Jiong Wang [Tue, 11 Aug 2015 20:55:52 +0000 (21:55 +0100)]
[AArch64] Long branch veneer support far symbol defined by --defsym

2015-08-11  Jiong Wang  <jiong.wang@arm.com>

bfd/
  * bfd/elfnn-aarch64.c (aarch64_type_of_stub): New parameter "sym_sec".
  Loose the check for symbol from ABS section.
  (elfNN_aarch64_size_stubs): Pass sym_sec.

ld/testsuite/
  * ld-aarch64/farcall-b-defsym.s: New test.
  * ld-aarch64/farcall-bl-defsym.s: Likewise.
  * ld-aarch64/farcall-b-defsym.d: New expectation.
  * ld-aarch64/farcall-bl-defsym.d: Likewise.

9 years ago[AArch64] PR18668, repair long branch veneer for plt stub
Jiong Wang [Tue, 11 Aug 2015 20:44:31 +0000 (21:44 +0100)]
[AArch64] PR18668, repair long branch veneer for plt stub

2015-08-11  Jiong Wang  <jiong.wang@arm.com>
bfd/
   PR ld/18668
   * elfnn-aarch64.c (aarch64_type_of_stub): Update destination for
   calls go through plt stub.
   (elfNN_aarch64_final_link_relocate): Adjust code logic for CALL26,
   JUMP26 relocation to support inserting veneer for call to plt stub.

ld/testsuite/
   * ld-aarch64/farcall-b-gsym.s: New test.
   * ld-aarch64/farcall-b-plt.s: Likewise.
   * ld-aarch64/farcall-bl-plt.s: Likewise.
   * ld-aarch64/farcall-b-gsym.d: New expect file.
   * ld-aarch64/farcall-b-plt.d: Likewise.
   * ld-aarch64/farcall-bl-plt.d: Likewise.

9 years ago[AArch64][8/8] LD support BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12
Jiong Wang [Tue, 11 Aug 2015 16:44:30 +0000 (17:44 +0100)]
[AArch64][8/8] LD support BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12

2015-08-11  Jiong Wang  <jiong.wang@arm.com>

bfd/
  * elfnn-aarch64.c (IS_AARCH64_TLS_RELOC): Recognize
  BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12.
  (aarch64_reloc_got_type): Likewise.
  (elfNN_aarch64_final_link_relocate): Likewise.
  (elfNN_aarch64_relocate_section): Likewise.
  * elfxx-aarch64.c (_bfd_aarch64_elf_put_addend): Likewise.
  (_bfd_aarch64_elf_resolve_relocation): Likewise.

ld/testsuite/
  * ld-aarch64/emit-relocs-529.s: New testcase.
  * ld-aarch64/emit-relocs-529-overflow.s: Likewise.
  * ld-aarch64/emit-relocs-86.s: Likewise.
  * ld-aarch64/emit-relocs-86-overflow.s: Likewise.
  * ld-aarch64/emit-relocs-529.d: New expectation file.
  * ld-aarch64/emit-relocs-529-overflow.d: Likewise.
  * ld-aarch64/emit-relocs-86.d: Likewise.
  * ld-aarch64/emit-relocs-86-overflow.d: Likewise.
  * ld-aarch64/aarch64-elf.exp: Run new testcases.

9 years ago[AArch64][7/8] GAS support BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12
Jiong Wang [Tue, 11 Aug 2015 16:38:49 +0000 (17:38 +0100)]
[AArch64][7/8] GAS support BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12

2015-08-11  Jiong Wang  <jiong.wang@arm.com>

include/elf/
  * aarch64.h (R_AARCH64_P32_TLSLD_ADD_DTPREL_LO12): Define.

bfd/
  * reloc.c (BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12): New entry.
  * bfd-in2.h: Regenerate.
  * libbfd.h: Regenerate.
  * elfnn-aarch64.c (elfNN_aarch64_howto_table): New entry for
  BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12.

gas/
  * config/tc-aarch64.c (reloc_table): New relocation modifiers
  "dtprel_lo12".
  (md_apply_fix): Support BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12.
  (aarch64_force_relocation): Likewise.

gas/testsuite/
  * gas/aarch64/reloc-dtprel_lo12-1.s: New testcase.
  * gas/aarch64/reloc-dtprel_lo12-ilp32-1.s: Likewise.
  * gas/aarch64/reloc-dtprel_lo12-1.d: New expectation file.
  * gas/aarch64/reloc-dtprel_lo12-ilp32-1.d: Likewise.

9 years ago[AArch64][6/8] LD support BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
Jiong Wang [Tue, 11 Aug 2015 16:20:17 +0000 (17:20 +0100)]
[AArch64][6/8] LD support BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC

2015-08-11  Jiong Wang  <jiong.wang@arm.com>

bfd/
  * elfnn-aarch64.c (IS_AARCH64_TLS_RELOC): Recognize
  BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC.
  (aarch64_reloc_got_type): Likewise.
  (elfNN_aarch64_final_link_relocate): Likewise.
  (elfNN_aarch64_relocate_section): Likewise.
  (elfNN_aarch64_gc_sweep_hook): Likewise.
  (elfNN_aarch64_check_relocs): Likewise.
  * elfxx-aarch64.c (_bfd_aarch64_elf_put_addend): Likewise.
  (_bfd_aarch64_elf_resolve_relocation): Likewise.

ld/testsuite/
  * ld-aarch64/tls-small-ld.s: Update testcase.

9 years ago[AArch64][5/8] GAS support BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
Jiong Wang [Tue, 11 Aug 2015 16:15:56 +0000 (17:15 +0100)]
[AArch64][5/8] GAS support BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC

2015-08-11  Jiong Wang  <jiong.wang@arm.com>

bfd/
  * reloc.c (BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC): New entry.
  * bfd-in2.h: Regenerate.
  * libbfd.h: Regenerate.
  * elfnn-aarch64.c (elfNN_aarch64_howto_table): New entry for
  BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC.

gas/
  * config/tc-aarch64.c (reloc_table): New relocation modifiers.
  (md_apply_fix): Support BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC.
  (aarch64_force_relocation): Likewise.

gas/testsuite/
  * gas/aarch64/reloc-tlsldm_lo12_nc-1.s: New testcase.
  * gas/aarch64/reloc-tlsldm_lo12_nc-ilp32-1.s: Likewise.
  * gas/aarch64/reloc-tlsldm_lo12_nc-1.d: New expectation file.
  * gas/aarch64/reloc-tlsldm_lo12_nc-ilp32-1.d: Likewise.

9 years ago[AArch64][4/8] Add R_AARCH64_P32_TLSLD_ADD_LO12_NC in elf header
Jiong Wang [Tue, 11 Aug 2015 16:07:30 +0000 (17:07 +0100)]
[AArch64][4/8] Add R_AARCH64_P32_TLSLD_ADD_LO12_NC in elf header

2015-08-11  Jiong Wang  <jiong.wang@arm.com>

include/elf/
  * aarch64.h (R_AARCH64_P32_TLSLD_ADD_LO12_NC): Define.

9 years ago[AArch64][3/8] LD support BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
Jiong Wang [Tue, 11 Aug 2015 16:05:34 +0000 (17:05 +0100)]
[AArch64][3/8] LD support BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21

2015-08-11  Jiong Wang  <jiong.wang@arm.com>

bfd/
  * elfnn-aarch64.c (IS_AARCH64_TLS_RELOC): Recognize
  BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21.
  (aarch64_reloc_got_type): Likewise.
  (elfNN_aarch64_final_link_relocate): Likewise.
  (elfNN_aarch64_relocate_section): Likewise.
  (elfNN_aarch64_gc_sweep_hook): Likewise.
  (elfNN_aarch64_check_relocs): Likewise.
  * elfxx-aarch64.c (_bfd_aarch64_elf_put_addend): Likewise.
  (_bfd_aarch64_elf_resolve_relocation): Likewise.

ld/testsuite/
  * ld-aarch64/tls-small-ld.s: New file.
  * ld-aarch64/tls-small-ld.d: Likewise.
  * ld-aarch64/aarch64-elf.exp: Run new test.

9 years ago[AArch64][2/8] GAS support BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
Jiong Wang [Tue, 11 Aug 2015 15:58:20 +0000 (16:58 +0100)]
[AArch64][2/8] GAS support BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21

2015-08-11  Jiong Wang  <jiong.wang@arm.com>

bfd/
  * reloc.c (BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21): New entry.
  * bfd-in2.h: Regenerate.
  * libbfd.h: Regenerate.
  * elfnn-aarch64.c (elfNN_aarch64_howto_table): New entry for
  BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21.

gas/
  * config/tc-aarch64.c (reloc_table): New relocation modifiers.
  (md_apply_fix): Support BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21.
  (aarch64_force_relocation): Likewise.

gas/testsuite/
  * gas/aarch64/reloc-tlsldm-page-1.s: New testcase.
  * gas/aarch64/reloc-tlsldm-page-ilp32-1.s: Likewise.
  * gas/aarch64/reloc-tlsldm-page-1.d: New expectation file.
  * gas/aarch64/reloc-tlsldm-page-ilp32-1.d: Likewise.

9 years ago[AArch64][1/8] Add R_AARCH64_P32_TLSLD_ADR_PAGE21 in elf header
Jiong Wang [Tue, 11 Aug 2015 15:53:12 +0000 (16:53 +0100)]
[AArch64][1/8] Add R_AARCH64_P32_TLSLD_ADR_PAGE21 in elf header

2015-08-11  Jiong Wang  <jiong.wang@arm.com>

include/elf/
  * aarch64.h (R_AARCH64_P32_TLSLD_ADR_PAGE21): Define.

9 years agoSkip IFUNC relocations in debug sections
H.J. Lu [Tue, 11 Aug 2015 19:58:52 +0000 (12:58 -0700)]
Skip IFUNC relocations in debug sections

Skip IFUNC relocations in debug sections ignored by ld.so.

bfd/

PR ld/18808
* elf32-i386.c (elf_i386_relocate_section): Skip IFUNC
relocations in debug sections.
* elf64-x86-64.c (elf_x86_64_relocate_section): Likewise.

ld/testsuite/

PR ld/18808
* ld-ifunc/ifunc.exp: Add a test for PR ld/18808.
* ld-ifunc/pr18808.out: New file.
* ld-ifunc/pr18808a.c: Likewise.
* ld-ifunc/pr18808b.c: Likewise.

9 years agoFix the disassembly of the AArch64 SIMD EXT instruction.
Nick Clifton [Tue, 11 Aug 2015 17:00:36 +0000 (18:00 +0100)]
Fix the disassembly of the AArch64 SIMD EXT instruction.

PR 18800
* aarch64-tbl.h (aarch64_opcode_table): Fix mask for SIMD EXT
instruction.

9 years agoFix encoding or OpenRisk1000 PC relative relocations.
Peter Zotov [Tue, 11 Aug 2015 16:12:21 +0000 (17:12 +0100)]
Fix encoding or OpenRisk1000 PC relative relocations.

PR ld/18759
* elf32-or1k.c (R_OR1K_32_PCREL): Set pcrel_offset to TRUE.
(R_OR1K_16_PCREL): Likewise.
(R_OR1K_8_PCREL): Likewise.

9 years agoFix typo in coff-sh.c.
Nick Clifton [Tue, 11 Aug 2015 16:02:25 +0000 (17:02 +0100)]
Fix typo in coff-sh.c.

PR binutils/18747
* coff-sh.c (_bfd_sh_align_load_span): Fix typo when setting
opcode count.

9 years agoTweak binutils testsuite
Alan Modra [Tue, 11 Aug 2015 12:24:48 +0000 (21:54 +0930)]
Tweak binutils testsuite

Some targets provide aligned .bss sections, so explicitly align.
msp430 and rl78 emit "magic" symbols when assembling symbol.s, and
mips targets emit STT_OBJECT rather than STT_NOTYPE syms.

* binutils-all/strip-12.s: Align .bss section.
* binutils-all/strip-12.d: Adjust.
* binutils-all/symbols-1.d: Allow extraneous symbols.
* binutils-all/symbols-2.d: Likewise, and V for weakened syms.
* binutils-all/symbols-3.d: Likewise.
* binutils-all/symbols-4.d: Likewise.

9 years agoFix memory access problems discovered when running some binary tools on corrupt files.
Nick Clifton [Tue, 11 Aug 2015 10:57:09 +0000 (11:57 +0100)]
Fix memory access problems discovered when running some binary tools on corrupt files.

PR binutils/18758
* elf.c (_bfd_elf_setup_sections): Add checks for corrupt section
group information.
* peicode.h (pe_ILF_make_a_section): Ensure alignment of the
used_by_bfd pointer.
(pe_ILF_build_a_bfd): Ensure alignment of vars.data pointer.

9 years agoFix a typo in _bfd_elf_copy_private_bfd_data
H.J. Lu [Tue, 11 Aug 2015 10:50:17 +0000 (03:50 -0700)]
Fix a typo in _bfd_elf_copy_private_bfd_data

* elf.c (_bfd_elf_copy_private_bfd_data): Fix a typo.

9 years agoFix compile time warning messages about constant expressions where a value is being...
Nick Clifton [Tue, 11 Aug 2015 09:07:21 +0000 (10:07 +0100)]
Fix compile time warning messages about constant expressions where a value is being shifted into bit 31.

PR gas/18765
* config/tc-arm.c (move_or_literal_pool): Use U suffix to remove
compile time warnings about constant expressions being shifted
into bit 31.
(do_iwmmxt_wldstd): Likewise.
(do_iwmmxt_wrwrwr_or_imm5): Likewise.
(md_assemble): Likewise.

9 years agoConvert 'A && (!A || B)' to 'A || B' in various places.
Nick Clifton [Tue, 11 Aug 2015 08:49:18 +0000 (09:49 +0100)]
Convert 'A && (!A || B)' to 'A || B' in various places.

PR gas/18574
* config/tc-msp430.c (msp430_operands): Rewrite if statements to
remove redundant checks.
(md_apply_fix): Likewise.

9 years agoFix typo checking MMIX operands.
Nick Clifton [Tue, 11 Aug 2015 08:43:16 +0000 (09:43 +0100)]
Fix typo checking MMIX operands.

PR gas/18677
* config/tc-mmix.c (md_assemble): Fix typo checking operands with
a numeric constant value.

9 years agoFix typo checking number of operands.
Nick Clifton [Tue, 11 Aug 2015 08:40:02 +0000 (09:40 +0100)]
Fix typo checking number of operands.

PR gas/18678
* config/tc-tic4x.c (tic4x_insn_check): Fix typo.

9 years agoFix a typo where the same name was checked twice.
Nick Clifton [Tue, 11 Aug 2015 08:36:57 +0000 (09:36 +0100)]
Fix a typo where the same name was checked twice.

PR gas/18679
* config/xtensa-relax.c (same_operand_name): Fix typo.

9 years agoPR gdb/18669 libiberty demangle.test failure: strtod() on sparc-sun-solaris2.9
Iain Buclaw [Tue, 11 Aug 2015 06:51:05 +0000 (08:51 +0200)]
PR gdb/18669 libiberty demangle.test failure: strtod() on sparc-sun-solaris2.9

Test symbols did not demangle as per the d-demangle-expected tests because
strtod() on Solaris 9 does not accept hexadecimal numbers.

This has now been fixed up so that no attempt at formatting/converting the
demangled hexadecimal literals are done.

libiberty/ChangeLog:

2015-08-11  Iain Buclaw  <ibuclaw@gdcproject.org>

* d-demangle.c (dlang_parse_real): Remove call to strtod.
(strtod): Remove declaration.
* testsuite/d-demangle-expected: Update float and complex literal
tests to check correct hexadecimal demangling.

9 years agoAutomatic date update in version.in
GDB Administrator [Tue, 11 Aug 2015 00:00:08 +0000 (00:00 +0000)]
Automatic date update in version.in

9 years agoremove trailing space in previous entry
Doug Evans [Mon, 10 Aug 2015 20:36:36 +0000 (13:36 -0700)]
remove trailing space in previous entry

9 years agoPR gdb/17960 Internal error: tracker != NULL when completing on file:function
Doug Evans [Mon, 10 Aug 2015 19:23:09 +0000 (12:23 -0700)]
PR gdb/17960 Internal error: tracker != NULL when completing on file:function

gdb/ChangeLog:

* symtab.c (make_file_symbol_completion_list_1): Renamed from
make_file_symbol_completion_list and made static.
(make_file_symbol_completion_list): New function.

gdb/testsuite/ChangeLog:

* gdb.base/completion.exp: Add location completer tests.

9 years agogdb/infrun.c: Various trivial ARI fixes.
Joel Brobecker [Mon, 10 Aug 2015 17:08:44 +0000 (10:08 -0700)]
gdb/infrun.c: Various trivial ARI fixes.

gdb/ChangeLog:

        * infrun.c (follow_fork, displaced_step_prepare, resume): Remove
        trailing new-line at end of warning message.
        (proceed): Add i18n marker to error messages.

9 years agoReplace hidden with versioned in elf_link_hash_entry
H.J. Lu [Mon, 10 Aug 2015 14:57:40 +0000 (07:57 -0700)]
Replace hidden with versioned in elf_link_hash_entry

This patch replaces the "hidden" field with the "versioned" field in
elf_link_hash_entry so that we can avoid calling strchr and strrchr if
the symbol is unversioned.

* elf-bfd.h (elf_symbol_version): New enum.
(elf_link_hash_entry): Replace hidden with versioned.
* elflink.c (_bfd_elf_merge_symbol): Don't look for symbol
version if the symbol is unversioned.  Initialize versioned.
(_bfd_elf_add_default_symbol): Don't look for symbol version
if the symbol is unversioned or hidden.  Initialize versioned.
(elf_collect_hash_codes): Don't look for symbol version if the
symbol is unversioned.
(elf_collect_gnu_hash_codes): Likewise.
(bfd_elf_gc_mark_dynamic_ref_symbol): Likewise.
(_bfd_elf_link_hash_copy_indirect): Check versioned instead of
hidden.
(elf_link_output_extsym): Likewise.

9 years agoAdd SIGRIE instruction for MIPS R6
Robert Suchanek [Mon, 10 Aug 2015 07:57:31 +0000 (08:57 +0100)]
Add SIGRIE instruction for MIPS R6

opcodes/

* mips-opc.c (mips_builtin_opcodes): Add "sigrie".

gas/testsuite/

* gas/mips/r6.s: Add tests for "sigrie".
* gas/mips/r6.d: Check for "sigrie".
* gas/mips/r6-n32.d: Likewise.
* gas/mips/r6-n64.d: Likewise.

9 years agoAutomatic date update in version.in
GDB Administrator [Mon, 10 Aug 2015 00:00:08 +0000 (00:00 +0000)]
Automatic date update in version.in

9 years agoAutomatic date update in version.in
GDB Administrator [Sun, 9 Aug 2015 00:00:07 +0000 (00:00 +0000)]
Automatic date update in version.in

9 years agotc-arm.c: Append ULL to 0xFFFFFFFFFFFFF to avoid errors on 32-bit hosts.
Hans-Peter Nilsson [Sat, 8 Aug 2015 20:44:37 +0000 (22:44 +0200)]
tc-arm.c: Append ULL to 0xFFFFFFFFFFFFF to avoid errors on 32-bit hosts.

9 years agoAutomatic date update in version.in
GDB Administrator [Sat, 8 Aug 2015 00:00:08 +0000 (00:00 +0000)]
Automatic date update in version.in

9 years agobinutils-all/strip-12.s: Use ".section .bss" instead of ".bss"
Hans-Peter Nilsson [Fri, 7 Aug 2015 23:04:50 +0000 (01:04 +0200)]
binutils-all/strip-12.s: Use ".section .bss" instead of ".bss"

which isn't supported by all ELF targets.

9 years agoCheck sh_type/sh_flags/sh_addralign/sh_entsize when copying sh_link/sh_info
H.J. Lu [Fri, 7 Aug 2015 17:28:42 +0000 (10:28 -0700)]
Check sh_type/sh_flags/sh_addralign/sh_entsize when copying sh_link/sh_info

When copying the sh_link and sh_info fields in stripped section headers,
we also check if the sh_type, sh_flags, /sh_addralign and sh_entsize
fields of the output section match the output.  Since --only-keep-debug
turns all non-debug sections into SHT_NOBITS sections, the output
SHT_NOBITS type matches any input type.

bfd/

PR binutils/18785
* elf.c (_bfd_elf_copy_private_bfd_data): When copying the
sh_link and sh_info fields in stripped section headers, we also
check if the sh_type, sh_flags, /sh_addralign and sh_entsize
fields of the output section match the output.  Since
--only-keep-debug turns all non-debug sections into SHT_NOBITS
sections, the output SHT_NOBITS type matches any input type.

binutils/testsuite/

PR binutils/18785
* binutils-all/objcopy.exp: Run strip-12.
* binutils-all/strip-12.d: New file.
* binutils-all/strip-12.s: Likewise.

9 years agonative Linux: enable always non-stop by default
Pedro Alves [Thu, 6 Aug 2015 17:23:01 +0000 (18:23 +0100)]
native Linux: enable always non-stop by default

The testsuite shows no regressions with this forced on, on:

 - Native x86_64 Fedora 20, with and output "set displaced off".

 - Native x86_64 Fedora 20, on top of x86 software single-step series.

 - PPC64 Fedora 18.

 - S/390 RHEL 7.1.

Let's try making it the default.

gdb/ChangeLog:
2015-08-07  Pedro Alves  <palves@redhat.com>

* linux-nat.c (linux_nat_always_non_stop_p): Return 1.

9 years agoS/390: displaced stepping and PC-relative RIL-b/RIL-c instructions
Pedro Alves [Thu, 6 Aug 2015 17:23:01 +0000 (18:23 +0100)]
S/390: displaced stepping and PC-relative RIL-b/RIL-c instructions

This adds displaced stepping support for the General-Instruction
Extension Facility instructions, which have a PC-relative displacement
(RIL-b/RIL-c).  We already handle RIL branches, but not others.

Currently, displaced stepping a breakpoint put on any of these
instructions results in the inferior crashing when or after the
instruction is executed out-of-line in the scratch pad.

This patch takes the easy route of patching the displacement in the
copy of the instruction in the scratch pad.  As the displacement is a
signed 32-bit field, it's possible that the stratch pad ends too far
that the needed displacement doesn't fit in the adjusted instruction,
as e.g., if stepping over a breakpoint in a shared library (the
scratch pad is around the main program's entry point).  That case is
detected and GDB falls back to stepping over the breakpoint in-line
(which involves pausing all threads momentarily).

(We could probably do something smarter, but I don't plan on doing it
myself.  This was already sufficient to get "maint set target-non-stop
on" working regression free on S/390.)

Tested on S/390 RHEL 7.1, where it fixes a few hundred FAILs when
testing with displaced stepping force-enabled, with the end result
being no regressions compared to a test run that doesn't force
displaced stepping.  Fixes the non-stop tests compared to mainline
too; most are crashing due to this on the machine I run tests on.

gdb/ChangeLog:
2015-08-07  Pedro Alves  <palves@redhat.com>

* s390-linux-tdep.c (is_non_branch_ril)
(s390_displaced_step_copy_insn): New functions.
(s390_displaced_step_fixup): Update comment.
(s390_gdbarch_init): Install s390_displaced_step_copy_insn as
gdbarch_displaced_step_copy_insn hook.

9 years agoPPC64: Fix gdb.arch/ppc64-atomic-inst.exp with displaced stepping
Pedro Alves [Thu, 6 Aug 2015 17:23:00 +0000 (18:23 +0100)]
PPC64: Fix gdb.arch/ppc64-atomic-inst.exp with displaced stepping

The ppc64 displaced step code can't handle atomic sequences.  Fallback
to stepping over the breakpoint in-line if we detect one.

gdb/ChangeLog:
2015-08-07  Pedro Alves  <palves@redhat.com>

* infrun.c (displaced_step_prepare_throw): Return -1 if
gdbarch_displaced_step_copy_insn returns NULL.  Update intro
comment.
* rs6000-tdep.c (LWARX_MASK, LWARX_INSTRUCTION, LDARX_INSTRUCTION)
(STWCX_MASK, STWCX_INSTRUCTION, STDCX_INSTRUCTION): Move higher up
in file.
(ppc_displaced_step_copy_insn): New function.
(ppc_displaced_step_fixup): Update comment.
(rs6000_gdbarch_init): Install ppc_displaced_step_copy_insn as
gdbarch_displaced_step_copy_insn hook.
* gdbarch.sh (displaced_step_copy_insn): Document what happens on
NULL return.
* gdbarch.h: Regenerate.

gdb/testsuite/ChangeLog:
2015-08-07  Pedro Alves  <palves@redhat.com>

* gdb.arch/ppc64-atomic-inst.exp (do_test): New procedure, move
tests here.
(top level): Run do_test with and without displaced stepping.

9 years agoDisable displaced stepping if trying it fails
Pedro Alves [Thu, 6 Aug 2015 17:22:59 +0000 (18:22 +0100)]
Disable displaced stepping if trying it fails

Running the testsuite with "maint set target-non-stop on" shows:

 (gdb) PASS: gdb.base/valgrind-infcall.exp: continue #98 (false warning)
 continue
 Continuing.
 dl_main (phdr=<optimized out>..., auxv=<optimized out>) at rtld.c:2302
 2302      LIBC_PROBE (init_complete, 2, LM_ID_BASE, r);
 Cannot access memory at address 0x400532
 (gdb) PASS: gdb.base/valgrind-infcall.exp: continue #99 (false warning)
 p gdb_test_infcall ()
 $1 = 1
 (gdb) FAIL: gdb.base/valgrind-infcall.exp: p gdb_test_infcall ()

Even though that was a native GNU/Linux test run, this test spawns
Valgrind and connects to it with "target remote".  The error above is
actually orthogonal to target-non-stop.  The real issue is that that
enables displaced stepping, and displaced stepping doesn't work with
Valgrind, because we can't write to the inferior memory (thus can't
copy the instruction to the scratch pad area).

I'm sure there will be other targets with the same issue, so trying to
identify Valgrind wouldn't be sufficient.  The fix is to try setting
up the displaced step anyway.  If we get a MEMORY_ERROR, we disable
displaced stepping for that inferior, and fall back to doing an
in-line step-over.  If "set displaced-stepping" is "on" (as opposed to
"auto), GDB warns displaced stepping failed ("on" is mainly useful for
the testsuite, not for users).

Tested on x86_64 Fedora 20.

gdb/ChangeLog:
2015-08-07  Pedro Alves  <palves@redhat.com>

* inferior.h (struct inferior) <displaced_stepping_failed>: New
field.
* infrun.c (use_displaced_stepping_now_p): New parameter 'inf'.
Return false if dispaced stepping failed before.
(resume): Pass the current inferior to
use_displaced_stepping_now_p.  Wrap displaced_step_prepare in
TRY/CATCH.  If we get a MEMORY_ERROR, set the inferior's
displaced_stepping_failed flag, and fall back to an in-line
step-over.

gdb/testsuite/ChangeLog:
2015-08-07  Pedro Alves  <palves@redhat.com>

* gdb.base/valgrind-disp-step.c: New file.
* gdb.base/valgrind-disp-step.exp: New file.

9 years agoFix step-over-{trips-on-watchpoint|lands-on-breakpoint}.exp race
Pedro Alves [Thu, 6 Aug 2015 17:22:59 +0000 (18:22 +0100)]
Fix step-over-{trips-on-watchpoint|lands-on-breakpoint}.exp race

On a target that is both always in non-stop mode and can do displaced
stepping (such as native x86_64 GNU/Linux, with "maint set
target-non-stop on"), the step-over-trips-on-watchpoint.exp test
sometimes fails like this:

   (gdb) PASS: gdb.threads/step-over-trips-on-watchpoint.exp: no thread-specific bp: step: thread 1
   set scheduler-locking off
   (gdb) PASS: gdb.threads/step-over-trips-on-watchpoint.exp: no thread-specific bp: step: set scheduler-locking off
   step
  -[Switching to Thread 0x7ffff7fc0700 (LWP 11782)]
  -Hardware watchpoint 4: watch_me
  -
  -Old value = 0
  -New value = 1
  -child_function (arg=0x0) at /home/pedro/gdb/mygit/src/gdb/testsuite/gdb.threads/step-over-trips-on-watchpoint.c:39
  -39           other = 1; /* set thread-specific breakpoint here */
  -(gdb) PASS: gdb.threads/step-over-trips-on-watchpoint.exp: no thread-specific bp: step: step
  +wait_threads () at /home/pedro/gdb/mygit/src/gdb/testsuite/gdb.threads/step-over-trips-on-watchpoint.c:49
  +49       return 1; /* in wait_threads */
  +(gdb) FAIL: gdb.threads/step-over-trips-on-watchpoint.exp: no thread-specific bp: step: step

Note "scheduler-locking" was set off.  The problem is that on such
targets, the step-over of thread 2 and the "step" of thread 1 can be
set to run simultaneously (since with displaced stepping the
breakpoint isn't ever removed from the target), and sometimes, the
"step" of thread 1 finishes first, so it'd take another resume to see
the watchpoint trigger.  Fix this by replacing the wait_threads
function with a one-line infinite loop that doesn't call any function,
so that the "step" of thread 1 never finishes.

gdb/testsuite/ChangeLog:
2015-08-07  Pedro Alves  <palves@redhat.com>

* gdb.threads/step-over-lands-on-breakpoint.c (wait_threads):
Delete function.
(main): Add alarm.  Run an infinite loop instead of calling
wait_threads.
* gdb.threads/step-over-lands-on-breakpoint.exp (do_test): Change
comment.
* gdb.threads/step-over-trips-on-watchpoint.c (wait_threads):
Delete function.
(main): Add alarm.  Run an infinite loop instead of calling
wait_threads.
* gdb.threads/step-over-trips-on-watchpoint.exp (do_test): Change
comment.

9 years agoFix interrupt-noterm.exp on targets always in non-stop
Pedro Alves [Thu, 6 Aug 2015 17:22:58 +0000 (18:22 +0100)]
Fix interrupt-noterm.exp on targets always in non-stop

With "maint set target-non-stop on" we get:

 @@ -66,13 +66,16 @@ Continuing.
  interrupt
  (gdb) PASS: gdb.base/interrupt-noterm.exp: interrupt

 -Program received signal SIGINT, Interrupt.
 -PASS: gdb.base/interrupt-noterm.exp: inferior received SIGINT
 -testcase src/gdb/testsuite/gdb.base/interrupt-noterm.exp completed in 0 seconds
 +[process 12119] #1 stopped.
 +0x0000003615ebc6d0 in __nanosleep_nocancel () at ../sysdeps/unix/syscall-template.S:81
 +81     T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
 +FAIL: gdb.base/interrupt-noterm.exp: inferior received SIGINT (timeout)
 +testcase src/gdb/testsuite/gdb.base/interrupt-noterm.exp completed in 10 seconds

That is, we get "[$thread] #1 stopped" instead of SIGINT.

The issue is that we don't currently distinguish send
"interrupt/ctrl-c" to target terminal vs "stop/pause" thread well;
both cases go through "target_stop".

And then, the native Linux backend (linux-nat.c) implements
target_stop with SIGSTOP in non-stop mode, and SIGINT in all-stop
mode.  Since "maint set target-non-stop on" forces the backend to be
always running in non-stop mode, even though the user-visible behavior
is "set non-stop" is "off", "interrupt" causes a SIGSTOP instead of
the SIGINT the test expects.

Fix this by introducing a target_interrupt method to use in the
"interrupt/ctrl-c" case, so "set non-stop off" can always work the
same irrespective of "maint set target-non-stop on/off".  I'm
explictly considering changing the "set non-stop on" behavior as out
of scope here.

Most of the patch is an across-the-board rename of to_stop hook
implementations to to_interrupt.  The only targets where something
more than a rename is being done are linux-nat.c and remote.c, which
are the only targets that support async, and thus are the only ones
the core side calls target_stop on.

gdb/ChangeLog:
2015-08-07  Pedro Alves  <palves@redhat.com>

* darwin-nat.c (darwin_stop): Rename to ...
(darwin_interrupt): ... this.
(_initialize_darwin_inferior): Adjust.
* gnu-nat.c (gnu_stop): Delete.
(gnu_target): Don't install gnu_stop.
* inf-ptrace.c (inf_ptrace_stop): Rename to ...
(inf_ptrace_interrupt): ... this.
(inf_ptrace_target): Adjust.
* infcmd.c (interrupt_target_1): Use target_interrupt instead of
target_stop.
* linux-nat (linux_nat_stop): Rename to ...
(linux_nat_interrupt): ... this.
(linux_nat_stop): Reimplement.
(linux_nat_add_target): Install linux_nat_interrupt.
* nto-procfs.c (nto_interrupt_twice): Rename to ...
(nto_handle_sigint_twice): ... this.
(nto_interrupt): Rename to ...
(nto_handle_sigint): ... this.  Call target_interrupt instead of
target_stop.
(procfs_wait): Adjust.
(procfs_stop): Rename to ...
(procfs_interrupt): ... this.
(init_procfs_targets): Adjust.
* procfs.c (procfs_stop): Rename to ...
(procfs_interrupt): ... this.
(procfs_target): Adjust.
* remote-m32r-sdi.c (m32r_stop): Rename to ...
(m32r_interrupt): ... this.
(init_m32r_ops): Adjust.
* remote-sim.c (gdbsim_stop_inferior): Rename to ...
(gdbsim_interrupt_inferior): ... this.
(gdbsim_stop): Rename to ...
(gdbsim_interrupt): ... this.
(gdbsim_cntrl_c): Adjust.
(init_gdbsim_ops): Adjust.
* remote.c (sync_remote_interrupt): Adjust comments.
(remote_stop_as): Rename to ...
(remote_interrupt_as): ... this.
(remote_stop): Adjust comment.
(remote_interrupt): New function.
(init_remote_ops): Install remote_interrupt.
* target.c (target_interrupt): New function.
* target.h (struct target_ops) <to_interrupt>: New field.
(target_interrupt): New declaration.
* windows-nat.c (windows_stop): Rename to ...
(windows_interrupt): ... this.
* target-delegates.c: Regenerate.

9 years agoFix signal-while-stepping-over-bp-other-thread.exp on targets always in non-stop
Pedro Alves [Thu, 6 Aug 2015 17:22:57 +0000 (18:22 +0100)]
Fix signal-while-stepping-over-bp-other-thread.exp on targets always in non-stop

With "maint set target-non-stop on" we get:

 -PASS: gdb.threads/signal-while-stepping-over-bp-other-thread.exp: step
 +FAIL: gdb.threads/signal-while-stepping-over-bp-other-thread.exp: step

The issue is simply that switch_back_to_stepped_thread is not used in
non-stop mode, thus infrun doesn't output the expected "switching back
to stepped thread" log.

gdb/testsuite/ChangeLog:
2015-08-07  Pedro Alves  <palves@redhat.com>

* signal-while-stepping-over-bp-other-thread.exp: Expect "restart
threads" as alternative to "switching back to stepped thread".

9 years agoImplement all-stop on top of a target running non-stop mode
Pedro Alves [Fri, 7 Aug 2015 16:24:01 +0000 (17:24 +0100)]
Implement all-stop on top of a target running non-stop mode

This finally implements user-visible all-stop mode running with the
target_ops backend always in non-stop mode.  This is a stepping stone
towards finer-grained control of threads, being able to do interesting
things like thread groups, associating groups with breakpoints, etc.
From the user's perspective, all-stop mode is really just a special
case of being able to stop and resume specific sets of threads, so it
makes sense to do this step first.

With this, even in all-stop, the target is no longer in charge of
stopping all threads before reporting an event to the core -- the core
takes care of it when it sees fit.  For example, when "next"- or
"step"-ing, we can avoid stopping and resuming all threads at each
internal single-step, and instead only stop all threads when we're
about to present the stop to the user.

The implementation is almost straight forward, as the heavy lifting
has been done already in previous patches.  Basically, we replace
checks for "set non-stop on/off" (the non_stop global), with calls to
a new target_is_non_stop_p function.  In a few places, if "set
non-stop off", we stop all threads explicitly, and in a few other
places we resume all threads explicitly, making use of existing
methods that were added for teaching non-stop to step over breakpoints
without displaced stepping.

This adds a new "maint set target-non-stop on/off/auto" knob that
allows both disabling the feature if we find problems, and
force-enable it for development (useful when teaching a target about
this.  The default is "auto", which means the feature is enabled if a
new target method says it should be enabled.  The patch implements the
method in linux-nat.c, just for illustration, because it still returns
false.  We'll need a few follow up fixes before turning it on by
default.  This is a separate target method from indicating regular
non-stop support, because e.g., while e.g., native linux-nat.c is
close to regression free with all-stop-non-stop (with following
patches will fixing the remaining regressions), remote.c+gdbserver
will still need more fixing, even though it supports "set non-stop
on".

Tested on x86_64 Fedora 20, native, with and without "set displaced
off", and with and without "maint set target-non-stop on"; and also
against gdbserver.

gdb/ChangeLog:
2015-08-07  Pedro Alves  <palves@redhat.com>

* NEWS: Mention "maint set/show target-non-stop".
* breakpoint.c (update_global_location_list): Check
target_is_non_stop_p instead of non_stop.
* infcmd.c (attach_command_post_wait, attach_command): Likewise.
* infrun.c (show_can_use_displaced_stepping)
(can_use_displaced_stepping_p, start_step_over_inferior):
Likewise.
(internal_resume_ptid): New function.
(resume): Use it.
(proceed): Check target_is_non_stop_p instead of non_stop.  If in
all-stop mode but the target is always in non-stop mode, start all
the other threads that are implicitly resumed too.
(for_each_just_stopped_thread, fetch_inferior_event)
(adjust_pc_after_break, stop_all_threads): Check
target_is_non_stop_p instead of non_stop.
(handle_inferior_event): Likewise.  Handle detach-fork in all-stop
with the target always in non-stop mode.
(handle_signal_stop) <random signal>: Check target_is_non_stop_p
instead of non_stop.
(switch_back_to_stepped_thread): Check target_is_non_stop_p
instead of non_stop.
(keep_going_stepped_thread): Use internal_resume_ptid.
(stop_waiting): If in all-stop mode, and the target is in non-stop
mode, stop all threads.
(keep_going_pass): Likewise, when starting a new in-line step-over
sequence.
* linux-nat.c (get_pending_status, select_event_lwp)
(linux_nat_filter_event, linux_nat_wait_1, linux_nat_wait): Check
target_is_non_stop_p instead of non_stop.
(linux_nat_always_non_stop_p): New function.
(linux_nat_stop): Check target_is_non_stop_p instead of non_stop.
(linux_nat_add_target): Install linux_nat_always_non_stop_p.
* target-delegates.c: Regenerate.
* target.c (target_is_non_stop_p): New function.
(target_non_stop_enabled, target_non_stop_enabled_1): New globals.
(maint_set_target_non_stop_command)
(maint_show_target_non_stop_command): New functions.
(_initilize_target): Install "maint set/show target-non-stop"
commands.
* target.h (struct target_ops) <to_always_non_stop_p>: New field.
(target_non_stop_enabled): New declaration.
(target_is_non_stop_p): New declaration.

gdb/doc/ChangeLog:
2015-08-07  Pedro Alves  <palves@redhat.com>

* gdb.texinfo (Maintenance Commands): Document "maint set/show
target-non-stop".

9 years agoTeach non-stop to do in-line step-overs (stop all, step, restart)
Pedro Alves [Fri, 7 Aug 2015 16:24:00 +0000 (17:24 +0100)]
Teach non-stop to do in-line step-overs (stop all, step, restart)

That is, step past breakpoints by:

 - pausing all threads
 - removing breakpoint at PC
 - single-step
 - reinsert breakpoint
 - restart threads

similarly to all-stop (with displaced stepping disabled).  This allows
non-stop to work on targets/architectures without displaced stepping
support.  That is, it makes displaced stepping an optimization instead
of a requirement.  For example, in principle, all GNU/Linux ports
support non-stop mode at the target_ops level, but not all
corresponding gdbarch's implement displaced stepping.  This should
make non-stop work for all (albeit, not as efficiently).  And then
there are scenarios where even if the architecture supports displaced
stepping, we can't use it, because we e.g., don't find a usable
address to use as displaced step scratch pad.  It should also fix
stepping past watchpoints on targets that have non-continuable
watchpoints in non-stop mode (e.g., PPC, untested).  Running the
instruction out of line in the displaced stepping scratch pad doesn't
help that case, as the copied instruction reads/writes the same
watched memory...  We can fix that too by teaching GDB to only remove
the watchpoint from the thread that we want to move past the
watchpoint (currently, removing a watchpoint always removes it from
all threads), but again, that can be considered an optimization; not
all targets would support it.

For those familiar with the gdb and gdbserver Linux target_ops
backends, the implementation should look similar, except it is done on
the core side.  When we pause threads, we may find they stop with an
interesting event that should be handled later when the thread is
re-resumed, thus we store such events in the thread object, and mark
the event as pending.  We should only consume pending events if the
thread is indeed resumed, thus we add a new "resumed" flag to the
thread object.  At a later stage, we might add new target methods to
accelerate some of this, like "pause all threads", with corresponding
RSP packets, but we'd still need a fallback method for remote targets
that don't support such packets, so, again, that can be deferred as
optimization.

My _real_ motivation here is making it possible to reimplement
all-stop mode on top of the target always working on non-stop mode, so
that e.g., we can send RSP packets to a remote target even while the
target is running -- can't do that in the all-stop RSP variant, by
design).

Tested on x86_64 Fedora 20, with and without "set displaced off"
forced.  The latter forces the new code paths whenever GDB needs to
step past a breakpoint.

gdb/ChangeLog:
2015-08-07  Pedro Alves  <pedro@codesourcery.com>

* breakpoint.c (breakpoints_should_be_inserted_now): If any thread
has a pending status, return true.
* gdbthread.h: Include target/waitstatus.h.
(struct thread_suspend_state) <stop_reason, waitstatus_pending_p,
stop_pc>: New fields.
(struct thread_info) <resumed>: New field.
(set_resumed): Declare.
* infrun.c: Include "event-loop.h".
(infrun_async_inferior_event_token, infrun_is_async): New globals.
(infrun_async): New function.
(clear_step_over_info): Add debug output.
(displaced_step_in_progress_any_inferior): New function.
(displaced_step_fixup): New returns int.
(start_step_over): Handle in-line step-overs too.  Assert the
thread is marked resumed.
(resume_cleanups): Clear the thread's resumed flag.
(resume): Set the thread's resumed flag.  Return early if the
thread has a pending status.  Allow stepping a breakpoint with no
signal.
(proceed): Adjust to check 'resumed' instead of 'executing'.
(clear_proceed_status_thread): If the thread has a pending status,
and that status is a finished step, discard the pending status.
(clear_proceed_status): Don't clear step_over_info here.
(random_pending_event_thread, do_target_wait): New functions.
(prepare_for_detach, wait_for_inferior, fetch_inferior_event): Use
do_target_wait.
(wait_one): New function.
(THREAD_STOPPED_BY): New macro.
(thread_stopped_by_watchpoint, thread_stopped_by_sw_breakpoint)
(thread_stopped_by_hw_breakpoint): New functions.
(switch_to_thread_cleanup, save_waitstatus, stop_all_threads): New
functions.
(handle_inferior_event): Also call set_resumed(false) on all
threads implicitly stopped by the event.
(restart_threads, resumed_thread_with_pending_status): New
functions.
(finish_step_over): If we were doing an in-line step-over before,
and no longer are after trying to start a new step-over, restart
all threads.  If we have multiple threads with pending events,
save the current event and go through the event loop again.
(handle_signal_stop): Return early if finish_step_over returns
false.
<random signal>: If we get a signal while stepping over a
breakpoint in-line in non-stop mode, restart all threads.  Clear
step_over_info before delivering the signal.
(keep_going_stepped_thread): Use internal_error instead of
gdb_assert.  Mark the thread as resumed.
(keep_going_pass_signal): Assert the thread isn't already resumed.
If some other thread is doing an in-line step-over, defer the
resume.  If we just started a new in-line step-over, stop all
threads.  Don't clear step_over_info.
(infrun_async_inferior_event_handler): New function.
(_initialize_infrun): Create async event handler with
infrun_async_inferior_event_handler as callback.
(infrun_async): New declaration.
* target.c (target_async): New function.
* target.h (target_async): Declare macro and readd as function
declaration.
* target/waitstatus.h (enum target_stop_reason)
<TARGET_STOPPED_BY_SINGLE_STEP>: New value.
* thread.c (new_thread): Clear the new waitstatus field.
(set_resumed): New function.

9 years agoFactor out code to re-resume stepped thread
Pedro Alves [Fri, 7 Aug 2015 16:23:59 +0000 (17:23 +0100)]
Factor out code to re-resume stepped thread

Just a code refactor, no funcionality change intended.

gdb/ChangeLog:
2015-08-07  Pedro Alves  <palves@redhat.com>

* infrun.c (keep_going_stepped_thread): New function, factored out
from ...
(switch_back_to_stepped_thread): ... here.

9 years agoAdd comments to currently_stepping and target_resume
Pedro Alves [Fri, 7 Aug 2015 16:23:59 +0000 (17:23 +0100)]
Add comments to currently_stepping and target_resume

Clarify that currently_stepping works at a higher level than
target_resume.

gdb/ChangeLog:
2015-08-07  Pedro Alves  <palves@redhat.com>

* infrun.c (currently_stepping): Extend intro comment.
* target.h (target_resume): Extend intro comment.

9 years agoMisc switch_back_to_stepped_thread cleanups
Pedro Alves [Fri, 7 Aug 2015 16:23:58 +0000 (17:23 +0100)]
Misc switch_back_to_stepped_thread cleanups

Several misc cleanups that prepare the tail end of this function, the
part that actually re-resumes the stepped thread.

The most non-obvious would be the currently_stepping change, I guess.
That's because it isn't ever correct to pass step=1 to target_resume
on software single-step targets, and currently_stepping works at a
conceptual higher level, it returns step=true even on software step
targets.  It doesn't really matter on hardware step targets, as the
breakpoint will be hit immediately, but it's just wrong on software
step targets.  I tested it against my x86 software single-step branch,
and it indeed fixes failed assertions (that catch spurious
PTRACE_SINGLESTEP requests) there.

gdb/ChangeLog:
2015-08-07  Pedro Alves  <palves@redhat.com>

* infrun.c (switch_back_to_stepped_thread): Use ecs->ptid instead
of inferior_ptid.  If the stepped thread vanished, return 0
instead of resuming here.  Use reset_ecs.  Print the prev_pc and
the current stop_pc in log message.  Clear trap_expected if the
thread advanced.  Don't pass currently_stepping to
do_target_resume.

9 years agoUse keep_going in proceed and start_step_over too
Pedro Alves [Fri, 7 Aug 2015 16:23:58 +0000 (17:23 +0100)]
Use keep_going in proceed and start_step_over too

The main motivation of this patch is sharing more code between the
proceed (starting the inferior for the first time) and keep_going
(restarting the inferior after handling an event) paths and using the
step_over_chain queue now embedded in the thread_info object for
pending in-line step-overs too (instead of just for displaced
stepping).

So this commit:

 - splits out a new keep_going_pass_signal function out of keep_going
   that is just like keep_going except for the bits that clear the
   signal to pass if the signal is set to "handle nopass".

 - makes proceed use keep_going too.

 - Makes start_step_over use keep_going_pass_signal instead of lower
   level displaced stepping things.

One user visible change: if inserting breakpoints while trying to
proceed fails, we now get:

  (gdb) si
  Warning:
  Could not insert hardware watchpoint 7.
  Could not insert hardware breakpoints:
  You may have requested too many hardware breakpoints/watchpoints.

  Command aborted.
  (gdb)

while before we only saw warnings with no indication that the command
was cancelled:

  (gdb) si
  Warning:
  Could not insert hardware watchpoint 7.
  Could not insert hardware breakpoints:
  You may have requested too many hardware breakpoints/watchpoints.

  (gdb)

Tested on x86_64-linux-gnu, ppc64-linux-gnu and s390-linux-gnu.

gdb/ChangeLog:
2015-08-07  Pedro Alves  <palves@redhat.com>

* gdbthread.h (struct thread_info) <prev_pc>: Extend comment.
* infrun.c (struct execution_control_state): Move higher up in the
file.
(reset_ecs): New function.
(start_step_over): Now returns int.  Rewrite to use
keep_going_pass_signal instead of manually starting a displaced step.
(resume): Don't call set_running here.  If displaced stepping
can't start now, clear trap_expected.
(find_thread_needs_step_over): Delete function.
(proceed): Set up finish_thread_state_cleanup.  Call set_running.
If the current thread needs a step over, push it in the step-over
chain.  Don't set insert breakpoints nor call resume directly
here.  Instead rewrite to use start_step_over and
keep_going_pass_signal.
(finish_step_over): New function.
(handle_signal_stop): Call finish_step_over instead of
start_step_over.
(switch_back_to_stepped_thread): If the event thread needs another
step-over do that first.  Use start_step_over.
(keep_going_pass_signal): New function, factored out from ...
(keep_going): ... here.
(_initialize_infrun): Comment moved here.
* thread.c (set_running_thread): New function.
(set_running, finish_thread_state): Use set_running_thread.

9 years agoEmbed the pending step-over chain in thread_info objects
Pedro Alves [Fri, 7 Aug 2015 16:23:57 +0000 (17:23 +0100)]
Embed the pending step-over chain in thread_info objects

In order to teach non-stop mode to do in-line step-overs (pause all
threads, remove breakpoint, single-step, reinsert breakpoint, restart
threads), we'll need to be able to queue in-line step over requests,
much like we queue displaced stepping (out-of-line) requests.
Actually, the queue should be the same -- threads wait for their turn
to step past something (breakpoint, watchpoint), doesn't matter what
technique we end up using when the step over actually starts.

I found that the queue management ends up simpler and more efficient
if embedded in the thread objects themselves.  This commit converts
the existing displaced stepping queue to that.  Later patches will
make the in-line step-overs code paths use it too.

gdb/ChangeLog:
2015-08-07  Pedro Alves  <palves@redhat.com>

* gdbthread.h (struct thread_info) <step_over_prev,
step_over_next>: New fields.
(thread_step_over_chain_enqueue, thread_step_over_chain_remove)
(thread_step_over_chain_next, thread_is_in_step_over_chain): New
declarations.
* infrun.c (struct displaced_step_request): Delete.
(struct displaced_step_inferior_state) <step_request_queue>:
Delete field.
(displaced_step_prepare): Assert that trap_expected is set.  Use
thread_step_over_chain_enqueue.  Split starting a new displaced
step to ...
(start_step_over): ... this new function.
(resume): Assert the thread isn't waiting for a step over already.
(proceed): Assert the thread isn't waiting for a step over
already.
(infrun_thread_stop_requested): Adjust to remove threads from the
embedded step-over chain.
(handle_inferior_event) <fork/vfork>: Call start_step_over after
displaced_step_fixup.
(handle_signal_stop): Call start_step_over after
displaced_step_fixup.
* infrun.h (step_over_queue_head): New declaration.
* thread.c (step_over_chain_enqueue, step_over_chain_remove)
(thread_step_over_chain_next, thread_is_in_step_over_chain)
(thread_step_over_chain_enqueue)
(thread_step_over_chain_remove): New functions.
(delete_thread_1): Remove thread from the step-over chain.

9 years agoMake thread_still_needs_step_over consider stepping_over_watchpoint too
Pedro Alves [Fri, 7 Aug 2015 16:23:57 +0000 (17:23 +0100)]
Make thread_still_needs_step_over consider stepping_over_watchpoint too

I noticed that even though keep_going knows to start a step over for a
watchpoint, thread_still_needs_step_over forgets it.

gdb/ChangeLog:
2015-08-07  Pedro Alves  <palves@redhat.com>

* infrun.c (thread_still_needs_step_over): Rename to ...
(thread_still_needs_step_over_bp): ... this.
(enum step_over_what): New.
(thread_still_needs_step_over): Reimplement.

9 years agoremote.c/all-stop: Implement TARGET_WAITKIND_NO_RESUMED and TARGET_WNOHANG
Pedro Alves [Fri, 7 Aug 2015 16:23:56 +0000 (17:23 +0100)]
remote.c/all-stop: Implement TARGET_WAITKIND_NO_RESUMED and TARGET_WNOHANG

Even though "target remote" supports target-async, the all-stop
target_wait implementation ignores TARGET_WNOHANG.  If the core
happens to poll for events and we've already read the stop reply out
of the serial/socket, remote_wait_as hangs forever instead of
returning an indication that there are no events to process.  This
can't happen currently, but later changes will trigger this.

gdb/ChangeLog:
2015-08-07  Pedro Alves  <palves@redhat.com>

* remote.c (remote_wait_as): If not waiting for a stop reply,
return TARGET_WAITKIND_NO_RESUMED.  If TARGET_WNOHANG is
requested, don't block waiting forever.

9 years agoChange adjust_pc_after_break's prototype
Pedro Alves [Fri, 7 Aug 2015 16:23:56 +0000 (17:23 +0100)]
Change adjust_pc_after_break's prototype

Prepare to use it in contexts without an ecs handy.  Follow up patches
will make use of this.

gdb/ChangeLog:
2015-08-07  Pedro Alves  <pedro@codesourcery.com>

* infrun.c (adjust_pc_after_break): Now takes thread_info and
waitstatus pointers instead of an ecs.  Adjust.
(handle_inferior_event): Adjust caller.

9 years agoFix and test "checkpoint" in non-stop mode
Pedro Alves [Fri, 7 Aug 2015 16:23:55 +0000 (17:23 +0100)]
Fix and test "checkpoint" in non-stop mode

Letting a "checkpoint" run to exit with "set non-stop on" behaves
differently compared to the default all-stop mode ("set non-stop
off").

Currently, in non-stop mode:

  (gdb) start
  Temporary breakpoint 1 at 0x40086b: file src/gdb/testsuite/gdb.base/checkpoint.c, line 28.
  Starting program: build/gdb/testsuite/gdb.base/checkpoint

  Temporary breakpoint 1, main () at src/gdb/testsuite/gdb.base/checkpoint.c:28
  28        char *tmp = &linebuf[0];
  (gdb) checkpoint
  checkpoint 1: fork returned pid 24948.
  (gdb) c
  Continuing.
  Copy complete.
  Deleting copy.
  [Inferior 1 (process 24944) exited normally]
  [Switching to process 24948]
  (gdb) info threads
    Id   Target Id         Frame
    1    process 24948 "checkpoint" (running)

  No selected thread.  See `help thread'.
  (gdb) c
  The program is not being run.
  (gdb)

Two issues above:

 1. Thread 1 got stuck in "(running)" state (it isn't really running)

 2. While checkpoints try to preserve the illusion that the thread is
    still the same when the process exits, GDB switched to "No thread
    selected." instead of staying with thread 1 selected.

Problem #1 is caused by handle_inferior_event and normal_stop not
considering that when a
TARGET_WAITKIND_SIGNALLED/TARGET_WAITKIND_EXITED event is reported,
and the inferior is mourned, the target may still have execution.

Problem #2 is caused by the make_cleanup_restore_current_thread
cleanup installed by fetch_inferior_event not being able to find the
original thread 1's ptid in the thread list, thus not being able to
restore thread 1 as selected thread.  The fix is to make the cleanup
installed by make_cleanup_restore_current_thread aware of thread ptid
changes, by installing a thread_ptid_changed observer that adjusts the
cleanup's data.

After the patch, we get the same in all-stop and non-stop modes:

  (gdb) c
  Continuing.
  Copy complete.
  Deleting copy.
  [Inferior 1 (process 25109) exited normally]
  [Switching to process 25113]
  (gdb) info threads
    Id   Target Id         Frame
  * 1    process 25113 "checkpoint" main () at src/gdb/testsuite/gdb.base/checkpoint.c:28
  (gdb)

Turns out the whole checkpoints.exp file can run in non-stop mode
unmodified.  I thought of moving most of the test file's contents to a
procedure that can be called twice, once in non-stop mode and another
in all-stop mode.  But then, the test already takes close to 30
seconds to run on my machine, so I thought it'd be nicer to run
all-stop and non-stop mode in parallel.  Thus I added a new
checkpoint-ns.exp file that just appends "set non-stop on" to GDBFLAGS
and sources checkpoint.exp.

gdb/ChangeLog:
2015-08-07  Pedro Alves  <palves@redhat.com>

* infrun.c (handle_inferior_event): If we get
TARGET_WAITKIND_SIGNALLED or TARGET_WAITKIND_EXITED in non-stop
mode, mark all threads of the exiting process as not-executing.
(normal_stop): If we get TARGET_WAITKIND_SIGNALLED or
TARGET_WAITKIND_EXITED in non-stop mode, finish all threads of the
exiting process, if inferior_ptid still points at a process.
* thread.c (struct current_thread_cleanup) <next>: New field.
(current_thread_cleanup_chain): New global.
(restore_current_thread_ptid_changed): New function.
(restore_current_thread_cleanup_dtor): Remove the cleanup from the
current_thread_cleanup_chain list.
(make_cleanup_restore_current_thread): Add the cleanup data to the
current_thread_cleanup_chain list.
(_initialize_thread): Install restore_current_thread_ptid_changed
as thread_ptid_changed observer.

gdb/testsuite/ChangeLog:
2015-08-07  Pedro Alves  <palves@redhat.com>

* gdb.base/checkpoint-ns.exp: New file.
* gdb.base/checkpoint.exp: Pass explicit "checkpoint.c" to
standard_testfile.