Commit graph

88155 commits

Author SHA1 Message Date
GDB Administrator
4e796e9fed Automatic date update in version.in 2016-08-11 00:00:21 +00:00
Maciej W. Rozycki
3807734dbe PR ld/15428: MIPS/LD/testsuite: Un-KFAIL `__ehdr_start' test 2
Complement commit b75d42bce5 ("Fix mips segfault on GOT access of
absolute symbol") and unmark the `__ehdr_start' test 2 as known to fail
for the n32 and n64 ABIs, as with the change referred in place the
causing issue has been properly addressed and consequently the tests do
not fail anymore and neither are supposed to.

	ld/
	PR ld/15428
	* testsuite/ld-mips-elf/mips-elf.exp: Un-KFAIL `__ehdr_start'
	test 2.
2016-08-11 00:54:41 +01:00
Pedro Alves
01d3dedf60 Fix PR gdb/19187 (process record over a fork causes internal error)
Right after a fork is detected, we detach breakpoints from the child
(detach_breakpoints), which calls into target_remove_breakpoint with
inferior_ptid pointing at the child process, but leaves the breakpoint
marked inserted (in the parent).

The problem is that record-full.c always deletes all knowledge of the
breakpoint.  Then when we later really delete the breakpoint from the
parent, we fail the assertion, since the breakpoint is unexpectedly
not found in the record-full.c breakpoint table.

The fix is simply to not forget about the breakpoint if we're
detaching it from a fork child.

gdb/ChangeLog:
2016-08-10  Pedro Alves  <palves@redhat.com>

	PR gdb/19187
	* record-full.c (record_full_remove_breakpoint): Don't remove the
	breakpoint from the record_full_breakpoints VEC if we're detaching
	the breakpoint from a fork child.

gdb/testsuite/ChangeLog:
2016-08-10  Pedro Alves  <palves@redhat.com>

	PR gdb/19187
	* gdb.reverse/waitpid-reverse.exp: Add comment and remove
	setup_kfails.
2016-08-10 23:03:29 +01:00
Pedro Alves
7397181903 Plumb enum remove_bp_reason all the way to target_remove_breakpoint
So the target knows whether we're detaching breakpoints.
Nothing uses the parameter in this patch yet.

gdb/ChangeLog:
2016-08-10  Pedro Alves  <palves@redhat.com>

	PR gdb/19187
	* break-catch-sig.c (signal_catchpoint_remove_location): Adjust
	interface.
	* break-catch-syscall.c (remove_catch_syscall):
	* breakpoint.c (enum remove_bp_reason): Moved to breakpoint.h.
	(remove_breakpoint_1): Pass 'reason' down.
	(remove_catch_fork, remove_catch_vfork, remove_catch_solib)
	(remove_catch_exec, remove_watchpoint, remove_masked_watchpoint)
	(base_breakpoint_remove_location, bkpt_remove_location)
	(bkpt_probe_remove_location, bkpt_probe_remove_location): Adjust
	interface.
	* breakpoint.h (enum remove_bp_reason): Moved here from
	breakpoint.c.
	(struct breakpoint_ops) <remove_location>: Add 'reason' parameter.
	* corelow.c (core_remove_breakpoint): New function.
	(init_core_ops): Install it as to_remove_breakpoint method.
	* exec.c (exec_remove_breakpoint): New function.
	(init_exec_ops): Install it as to_remove_breakpoint method.
	* mem-break.c (memory_remove_breakpoint): Adjust interface.
	* record-btrace.c (record_btrace_remove_breakpoint): Adjust
	interface.
	* record-full.c (record_full_remove_breakpoint)
	(record_full_core_remove_breakpoint): Adjust interface.
	* remote.c (remote_remove_breakpoint): Adjust interface.
	* target-debug.h (target_debug_print_enum_remove_bp_reason): New
	macro.
	* target-delegates.c: Regenerate.
	* target.c (target_remove_breakpoint): Add 'reason' parameter.
	* target.h (struct target_ops) <to_remove_breakpoint>: Add
	'reason' parameter.
	(target_remove_breakpoint, memory_remove_breakpoint): Add 'reason'
	parameter.
2016-08-10 23:03:29 +01:00
Pedro Alves
b2b6a7dab9 Introduce 'enum remove_bp_reason'
Makes the code more obvious.

gdb/ChangeLog:
2016-08-10  Pedro Alves  <palves@redhat.com>

	PR gdb/19187
	* breakpoint.c (insertion_state_t): Delete.
	(enum remove_bp_reason): New.
	(detach_breakpoints, remove_breakpoint_1, remove_breakpoint):
	Adjust to use enum remove_bp_reason instead of insertion_state_t.
2016-08-10 23:03:29 +01:00
Pedro Alves
834c0d033b Simplify remove_breakpoint interface
All callers pass mark_uninserted, so there's no need for the 'is'
parameter.

gdb/ChangeLog:
2016-08-10  Pedro Alves  <palves@redhat.com>

	PR gdb/19187
	* breakpoint.c (remove_breakpoint): Remove 'is' parameter and
	always pass mark_uninserted to remove_breakpoint_1.
	(insert_breakpoint_locations, remove_breakpoints)
	(remove_breakpoints_pid, update_global_location_list): Update
	callers.
2016-08-10 23:03:28 +01:00
Maciej W. Rozycki
0375b0a537 MIPS/LD/testsuite: Verify microMIPS LA25 stub generation
Repeat `PIC and non-PIC test 1' checks for microMIPS LA25 stubs,
covering code generation and stub symbol annotation.

	ld/
	* testsuite/ld-mips-elf/pic-and-nonpic-1-micromips-rel.dd: New
	test.
	* testsuite/ld-mips-elf/pic-and-nonpic-1-micromips-rel.nd: New
	test.
	* testsuite/ld-mips-elf/pic-and-nonpic-1-micromips.dd: New test.
	* testsuite/ld-mips-elf/pic-and-nonpic-1-micromips.nd: New test.
	* testsuite/ld-mips-elf/pic-and-nonpic-1a-micromips.s: New test
	source.
	* testsuite/ld-mips-elf/pic-and-nonpic-1b-micromips.s: New test
	source.
	* testsuite/ld-mips-elf/mips-elf.exp: Run the new tests.
2016-08-10 22:24:43 +01:00
Maciej W. Rozycki
fe152e64f6 MIPS/BFD: Actually produce short microMIPS LA25 stubs
For the case where a function which requires an LA25 stub is at the
beginning of a section we use a short sequence comprised of a LUI/ADDIU
instruction pair only and prepended to the associated function rather
than using a trailing jump to reach the function.  This works by
checking for the offset into section of the function symbol being 0.

This is however never the case for microMIPS function symbols, which
have the ISA bit set.  Consequently the short LA25 sequence is never
produced for microMIPS functions, like with the following example:

$ cat la25a.s
	.abicalls

	.global	f1
	.ent	f1
f1:
	.set	noreorder
	.cpload	$25
	.set	reorder
	.option	pic0
	jal	f2
	.option	pic2
	jr	$31
	.end	f1

	.global	f2
	.ent	f2
f2:
	jr	$31
	.end	f2
$ cat la25b.s
	.abicalls
	.option	pic0

	.global	__start
	.ent	__start
__start:
	jal	f1
	jal	f2
	.end	__start
$ as -mmicromips -32 -EB -o la25a.o la25a.s
$ as -mmicromips -32 -EB -o la25b.o la25b.s
$ ld -melf32btsmip -o la25 la25a.o la25b.o
$ objdump -d la25

la25:     file format elf32-tradbigmips

Disassembly of section .text:

004000d0 <.pic.f2>:
  4000d0:	41b9 0040 	lui	t9,0x40
  4000d4:	d420 0083 	j	400106 <f2>
  4000d8:	3339 0107 	addiu	t9,t9,263
  4000dc:	0000 0000 	nop

004000e0 <.pic.f1>:
  4000e0:	41b9 0040 	lui	t9,0x40
  4000e4:	d420 0078 	j	4000f0 <f1>
  4000e8:	3339 00f1 	addiu	t9,t9,241
  4000ec:	0000 0000 	nop

004000f0 <f1>:
  4000f0:	41bc 0002 	lui	gp,0x2
  4000f4:	339c 801f 	addiu	gp,gp,-32737
  4000f8:	033c e150 	addu	gp,gp,t9
  4000fc:	f420 0083 	jal	400106 <f2>
  400100:	0000 0000 	nop
  400104:	45bf      	jrc	ra

00400106 <f2>:
  400106:	45bf      	jrc	ra
	...

00400110 <__start>:
  400110:	f420 0070 	jal	4000e0 <.pic.f1>
  400114:	0000 0000 	nop
  400118:	f420 0068 	jal	4000d0 <.pic.f2>
  40011c:	0000 0000 	nop
$

where `.pic.f1' could omit the trailing jump and the filler NOP and just
fall through to `f1'.

Correct the problem by masking out the ISA bit from microMIPS functions,
which fixes the earlier example:

$ objdump -d la25

la25:     file format elf32-tradbigmips

Disassembly of section .text:

004000d0 <.pic.f2>:
  4000d0:	41b9 0040 	lui	t9,0x40
  4000d4:	d420 0083 	j	400106 <f2>
  4000d8:	3339 0107 	addiu	t9,t9,263
	...

004000e8 <.pic.f1>:
  4000e8:	41b9 0040 	lui	t9,0x40
  4000ec:	3339 00f1 	addiu	t9,t9,241

004000f0 <f1>:
  4000f0:	41bc 0002 	lui	gp,0x2
  4000f4:	339c 801f 	addiu	gp,gp,-32737
  4000f8:	033c e150 	addu	gp,gp,t9
  4000fc:	f420 0083 	jal	400106 <f2>
  400100:	0000 0000 	nop
  400104:	45bf      	jrc	ra

00400106 <f2>:
  400106:	45bf      	jrc	ra
	...

00400110 <__start>:
  400110:	f420 0074 	jal	4000e8 <.pic.f1>
  400114:	0000 0000 	nop
  400118:	f420 0068 	jal	4000d0 <.pic.f2>
  40011c:	0000 0000 	nop
$

There is no need to do anything for MIPS16 functions, because if any
LA25 stub has been generated for such a function, then it is only
required for an associated call thunk only, which is regular MIPS code
and the address of which, with the ISA bit clear, is returned by
`mips_elf_get_la25_target'.

This problem has been there since the beginning of microMIPS support:

commit df58fc944d
Author: Richard Sandiford <rdsandiford@googlemail.com>
Date:   Sun Jul 24 14:20:15 2011 +0000

<https://sourceware.org/ml/binutils/2011-07/msg00198.html>, ("MIPS:
microMIPS ASE support").

	bfd/
	* elfxx-mips.c (mips_elf_add_la25_stub): Clear the ISA bit of
	the stub address retrieved if associated with a microMIPS
	function.
2016-08-10 22:22:50 +01:00
Maciej W. Rozycki
a848a2271b MIPS/BFD: Add microMIPS annotation to LA25 stub symbols
Fix a problem with missing microMIPS symbol annotation with microMIPS
LA25 stub symbols.  The consequence of the issue is these symbols appear
in the symbol table as regular MIPS symbols with the ISA bit set, as
shown with the example below:

$ cat la25a.s
	.abicalls

	.global	f1
	.ent	f1
f1:
	.set	noreorder
	.cpload	$25
	.set	reorder
	.option	pic0
	jal	f2
	.option	pic2
	jr	$31
	.end	f1

	.global	f2
	.ent	f2
f2:
	jr	$31
	.end	f2
$ cat la25b.s
	.abicalls
	.option	pic0

	.global	__start
	.ent	__start
__start:
	jal	f1
	jal	f2
	.end	__start
$ as -mmicromips -32 -EB -o la25a.o la25a.s
$ as -mmicromips -32 -EB -o la25b.o la25b.s
$ ld -melf32btsmip -o la25 la25a.o la25b.o
$ readelf -s la25

Symbol table '.symtab' contains 18 entries:
   Num:    Value  Size Type    Bind   Vis      Ndx Name
     0: 00000000     0 NOTYPE  LOCAL  DEFAULT  UND
     1: 00400098     0 SECTION LOCAL  DEFAULT    1
     2: 004000b0     0 SECTION LOCAL  DEFAULT    2
     3: 004000d0     0 SECTION LOCAL  DEFAULT    3
     4: 00000000     0 SECTION LOCAL  DEFAULT    4
     5: 00000000     0 SECTION LOCAL  DEFAULT    5
     6: 00418110     0 NOTYPE  LOCAL  DEFAULT    3 _gp
     7: 004000e1    16 FUNC    LOCAL  DEFAULT    3 .pic.f1
     8: 004000d1    16 FUNC    LOCAL  DEFAULT    3 .pic.f2
     9: 00410120     0 NOTYPE  GLOBAL DEFAULT    3 _fdata
    10: 00400110    16 FUNC    GLOBAL DEFAULT [MICROMIPS]     3 __start
    11: 00400106     2 FUNC    GLOBAL DEFAULT [MICROMIPS]     3 f2
    12: 004000d0     0 NOTYPE  GLOBAL DEFAULT    3 _ftext
    13: 00410120     0 NOTYPE  GLOBAL DEFAULT    3 __bss_start
    14: 004000f0    22 FUNC    GLOBAL DEFAULT [MICROMIPS]     3 f1
    15: 00410120     0 NOTYPE  GLOBAL DEFAULT    3 _edata
    16: 00410120     0 NOTYPE  GLOBAL DEFAULT    3 _end
    17: 00410120     0 NOTYPE  GLOBAL DEFAULT    3 _fbss
$

where microMIPS annotation is missing for `.pic.f1' and `.pic.f2' even
though these stubs are associated with microMIPS functions `f1' and `f2'
respectively.

Add the missing annotation then, by copying it from the function symbol
an LA25 stub is associated with, correcting the example above:

$ readelf -s la25

Symbol table '.symtab' contains 18 entries:
   Num:    Value  Size Type    Bind   Vis      Ndx Name
     0: 00000000     0 NOTYPE  LOCAL  DEFAULT  UND
     1: 00400098     0 SECTION LOCAL  DEFAULT    1
     2: 004000b0     0 SECTION LOCAL  DEFAULT    2
     3: 004000d0     0 SECTION LOCAL  DEFAULT    3
     4: 00000000     0 SECTION LOCAL  DEFAULT    4
     5: 00000000     0 SECTION LOCAL  DEFAULT    5
     6: 00418110     0 NOTYPE  LOCAL  DEFAULT    3 _gp
     7: 004000e0    16 FUNC    LOCAL  DEFAULT [MICROMIPS]     3 .pic.f1
     8: 004000d0    16 FUNC    LOCAL  DEFAULT [MICROMIPS]     3 .pic.f2
     9: 00410120     0 NOTYPE  GLOBAL DEFAULT    3 _fdata
    10: 00400110    16 FUNC    GLOBAL DEFAULT [MICROMIPS]     3 __start
    11: 00400106     2 FUNC    GLOBAL DEFAULT [MICROMIPS]     3 f2
    12: 004000d0     0 NOTYPE  GLOBAL DEFAULT    3 _ftext
    13: 00410120     0 NOTYPE  GLOBAL DEFAULT    3 __bss_start
    14: 004000f0    22 FUNC    GLOBAL DEFAULT [MICROMIPS]     3 f1
    15: 00410120     0 NOTYPE  GLOBAL DEFAULT    3 _edata
    16: 00410120     0 NOTYPE  GLOBAL DEFAULT    3 _end
    17: 00410120     0 NOTYPE  GLOBAL DEFAULT    3 _fbss
$

This problem has been there since the beginning of microMIPS support:

commit df58fc944d
Author: Richard Sandiford <rdsandiford@googlemail.com>
Date:   Sun Jul 24 14:20:15 2011 +0000

<https://sourceware.org/ml/binutils/2011-07/msg00198.html>, ("MIPS:
microMIPS ASE support").

	bfd/
	* elfxx-mips.c (mips_elf_create_stub_symbol): For a microMIPS
	stub also add STO_MICROMIPS annotation.
2016-08-10 22:21:15 +01:00
Maciej W. Rozycki
c7318def0c MIPS/BFD: Set the ISA bit in microMIPS LA25 stub references
Fix a linker regression introduced with commit 9d862524f6 ("MIPS:
Verify the ISA mode and alignment of branch and jump targets") causing a
build failure in microMIPS glibc where the `zdump' tool fails to link:

.../timezone/zdump.o: In function `yeartot':
.../timezone/zdump.c:758:(.text+0x62): Jump to a non-instruction-aligned address
.../timezone/zdump.c:758:(.text+0x76): Jump to a non-instruction-aligned address
.../timezone/zdump.c:768:(.text+0x112): Jump to a non-instruction-aligned address
.../timezone/zdump.c:774:(.text+0x1b8): Jump to a non-instruction-aligned address
.../timezone/zdump.c:774:(.text+0x1cc): Jump to a non-instruction-aligned address
collect2: error: ld returned 1 exit status
make[2]: *** [.../timezone/zdump] Error 1

The cause of the failure is the stricter check introduced with the said
change for jump and branch targets tripping on the address of microMIPS
LA25 stubs.  Despite being microMIPS code these stubs do not have the
ISA bit set throughout the relocation calculation process, because they
have their address set to the memory offset into the stub section they
are placed in.

The `mips_elf_la25_stub' structure does not carry ISA mode information,
but there is no need to extend it, because the ISA mode can be inferred
from the original symbol, which will have STO_MICROMIPS annotation, so
use that instead to set the ISA bit appropriately.  Also only LA25 stubs
associated with microMIPS symbols need to have the ISA bit set, because
other LA25 stubs are made with regular MIPS code, even if associated
with a MIPS16 symbol (in which case they are needed by a call thunk only
rather than the MIPS16 function proper).

	bfd/
	* elfxx-mips.c (mips_elf_calculate_relocation): Set the ISA bit
	in microMIPS LA25 stub references.
2016-08-10 22:19:33 +01:00
Руслан Ижбулатов
24cdb46e9f Support setting thread names (MS-Windows)
This is done by catching an exception number 0x406d1388 (it has no
documented name, though MSDN dubs it "MS_VC_EXCEPTION" in one code
example), which is thrown by the program.  The exception record
contains an ID of a thread and a name to give it.

This requires rolling back some changes in handle_exception(), which
now again returns more than two distinct values.  The new
HANDLE_EXCEPTION_IGNORED value means that gdb should just continue,
without returning the thread ID up the stack (which would result in
further handling of the exception, which is not what we want).

gdb/ChangeLog:
2016-08-10  Руслан Ижбулатов  <lrn1986@gmail.com>
	    Pedro Alves  <palves@redhat.com>

	* windows-nat.c (MS_VC_EXCEPTION): New define.
	(handle_exception_result): New enum.
	(windows_delete_thread): Free the thread's name.
	(handle_exception): Handle MS_VC_EXCEPTION.
	(get_windows_debug_event): Handle HANDLE_EXCEPTION_IGNORED.
	(windows_thread_name): New function.
	(windows_target): Install it as to_thread_name method.
	* NEWS: Mention the thread naming support on MS-Windows.
2016-08-10 19:22:45 +01:00
Cary Coutant
f571390111 Fix extraneous complaints about missing expected TLS relocation.
With some versions of gas, the call to tls_get_addr uses a GOTPCREL
relocation instead of a GOTPCRELX relocation. We should allow for that
when skip_call_tls_get_addr_ is true. We should also build the test
objects with the in-tree assembler.

This patch also fixes some cascading error messages caused by not
resetting the skip_call_tls_get_addr_ flag after printing the error.

gold/
	PR gold/20216
	* x86_64.cc (Target_x86_64::Relocate::relocate): Add check for
	R_X86_64_GOTPCREL. Reset skip_call_tls_get_addr_ after printing
	error message.
	* testsuite/Makefile.am (pr20216_gd.o): Add -Bgcctestdir/.
	(pr20216_ld.o): Likewise.
	* testsuite/Makefile.in: Regenerate.
2016-08-10 10:57:42 -07:00
James Clarke
2c00092dce Fix potential crashes when Target::make_symbol() returns NULL.
2016-08-10  James Clarke  <jrtc27@jrtc27.com>

gold/
	PR gold/20443
	* symtab.cc (Symbol_table::add_from_relobj): Handle NULL symbols,
	which will be present for STT_SPARC_REGISTER.
	(Symbol_table::add_from_pluginobj): Likewise.
	(Symbol_table::add_from_dynobj): Likewise.
	(Symbol_table::add_from_incrobj): Removed dead code.
2016-08-10 09:58:01 -07:00
James Clarke
007801eeb1 Fix improper handling of R_SPARC_GOTDATA_OP_LOX10 relocation.
The fall-through in Target_sparc::Relocate::relocate for
R_SPARC_GOTDATA_OP_LOX10 is currently R_SPARC_GOT13, but should
clearly be R_SPARC_GOT10. GCC has been seen to emit a sethi/xor
rather than a sethi/or sequence to load a 32-bit immediate, but
if R_SPARC_GOT13 is used then bits 10-12 get zeroed out as both
the sethi and xor immediates contain them.

gold/
	PR gold/20442
	* sparc.cc (Target_sparc::Relocate::relocate): R_SPARC_GOTDATA_OP_LOX10
	should fall back on R_SPARC_GOT10, not R_SPARC_GOT13.
2016-08-10 09:48:26 -07:00
James Clarke
55872e496e Add support for R_SPARC_32 relocation.
gold/
	PR gold/20441
	* sparc.cc (Target_sparc::Scan::check_non_pic): Allow R_SPARC_32 on
	sparc64.
2016-08-10 09:42:39 -07:00
Pedro Alves
669f9429c7 Quiet ARI gettext checks
The ARI complains about this new file:

 common/signals-state-save-restore.c:46: warning: gettext: All messages should be marked up with _.
 common/signals-state-save-restore.c:59: warning: gettext: All messages should be marked up with _.
 common/signals-state-save-restore.c:87: warning: gettext: All messages should be marked up with _.
 common/signals-state-save-restore.c:92: warning: gettext: All messages should be marked up with _.

Since these are untranslatable strings, use () instead of _().

gdb/ChangeLog:
2016-08-10  Pedro Alves  <palves@redhat.com>

	* common/signals-state-save-restore.c
	(save_original_signals_state, restore_original_signals_state):
	Wrap perror_with_name arguments with '()'.
2016-08-10 16:06:57 +01:00
GDB Administrator
51132311db Automatic date update in version.in 2016-08-10 00:00:21 +00:00
H.J. Lu
5ff559107a Skip LTO tests for --disable-plugin
Don't run LTO tests if compiler is configured with --disable-plugin.

	PR ld/20436
	* testsuite/lib/ld-lib.exp (check_gcc_plugin_enabled): New
	proc.
	(check_lto_available): Return 0 if check_gcc_plugin_enabled
	returns 0.
	(check_lto_fat_available): Likewise.
	(check_lto_shared_available): Likewise.
2016-08-09 16:41:29 -07:00
Pedro Alves
3eb7562a98 Fix PR gdb/20418 - Problems with synchronous commands and new-ui
When executing commands on a secondary UI running the MI interpreter,
some commands that should be synchronous are not.  MI incorrectly
continues processing input right after the synchronous command is
sent, before the target stops.

The problem happens when we emit MI async events (=library-loaded,
etc.), and we go about restoring the previous terminal state, we end
up calling target_terminal_ours, which incorrectly always installs the
current UI's input_fd in the event loop...  That is, code like this:

   old_chain = make_cleanup_restore_target_terminal ();
   target_terminal_ours_for_output ();

   fprintf_unfiltered (mi->event_channel, "library-loaded");

...

   do_cleanups (old_chain);

The fix is to move the add_file_handler/delete_file_handler calls out
of target_terminal_$foo, making these completely no-ops unless called
with the main UI as current UI.

gdb/ChangeLog:
2016-08-09  Pedro Alves  <palves@redhat.com>

	PR gdb/20418
	* event-top.c (ui_register_input_event_handler)
	(ui_unregister_input_event_handler): New functions.
	(async_enable_stdin): Register input in the event loop.
	(async_disable_stdin): Unregister input from the event loop.
	(gdb_setup_readline): Register input in the event loop.
	* infrun.c (check_curr_ui_sync_execution_done): Register input in
	the event loop.
	* target.c (target_terminal_inferior): Don't unregister input from
	the event loop.
	(target_terminal_ours): Don't register input in the event loop.
	* target.h (target_terminal_inferior)
	(target_terminal_ours_for_output, target_terminal_ours): Update
	comments.
	* top.h (ui_register_input_event_handler)
	(ui_unregister_input_event_handler): New declarations.
	* utils.c (ui_unregister_input_event_handler_cleanup)
	(prepare_to_handle_input): New functions.
	(defaulted_query, prompt_for_continue): Use
	prepare_to_handle_input.

gdb/testsuite/ChangeLog:
2016-08-09  Pedro Alves  <palves@redhat.com>
	    Simon Marchi  <simon.marchi@ericsson.com>

	PR gdb/20418
	* gdb.mi/new-ui-mi-sync.c, gdb.mi/new-ui-mi-sync.exp: New files.
	* lib/mi-support.exp (mi_expect_interrupt): Remove anchors.
2016-08-09 22:50:45 +01:00
Pedro Alves
8061491427 Fix PR mi/20431 - Missing MI prompts after sync execution MI command (-exec-continue, etc.) errors
gdb 7.11 introduced an MI regression: a failing MI sync execution
command misses printing the MI prompt, and then all subsequent command
miss it too:

 $ gdb-7.11.1 -i=mi
 [...]
 p 1
 &"p 1\n"
 ~"$1 = 1"
 ~"\n"
 ^done
 (gdb)                                        <<< prompted ok
 -exec-continue
 ^error,msg="The program is not being run."   <<< missing prompt after this
 print 1
 &"print 1\n"
 ~"$2 = 1"
 ~"\n"
 ^done                                        <<< missing prompt after this


gdb 7.10.1 behaved correctly, even with "set mi-async on":

 -exec-continue
 ^error,msg="The program is not being run."
 (gdb)                                        <<< prompted ok

etc.

Bisecting points at:

  commit 0b333c5e7d
  Author: Pedro Alves <palves@redhat.com>
  Date:   Wed Sep 9 18:23:23 2015 +0100

      Merge async and sync code paths some more
  [...]

The problem is that when an exception is thrown, we leave the prompt
state set to PROMPT_BLOCKED, and then mi_execute_command_input_handler
doesn't print the prompt.  It used to work because before that patch,
we happened to skip disabling stdin if the current target didn't do
async (which it never does before execution).

I was surprised to find that this bug isn't caught by the testsuite,
so I made a thorough test that tests all combinations of pairs of:

 - a failing synchronous execution command
 - a failing non-execution command
 - a non-failing command

gdb/ChangeLog:
2016-08-09  Pedro Alves  <palves@redhat.com>

	PR mi/20431
	* mi/mi-main.c (mi_execute_command): Enable input and set prompt
	state to PROMPT_NEEDED.

gdb/testsuite/ChangeLog:
2016-08-09  Pedro Alves  <palves@redhat.com>

	PR mi/20431
	* gdb.mi/mi-cmd-error.exp: New file.
2016-08-09 22:45:39 +01:00
Pedro Alves
f348d89aec Fix PR gdb/18653: gdb disturbs inferior's inherited signal dispositions
gdb's (or gdbserver's) own signal handling should not interfere with
the signal dispositions their spawned children inherit.  However, it
currently does.  For example, some paths in gdb cause SIGPIPE to be
set to SIG_IGN, and as consequence, the child starts with SIGPIPE to
set to SIG_IGN too, even though gdb was started with SIGPIPE set to
SIG_DFL.

This is because the exec family of functions does not reset the signal
disposition of signals that are set to SIG_IGN:

  http://pubs.opengroup.org/onlinepubs/7908799/xsh/execve.html

  Signals set to the default action (SIG_DFL) in the calling process
  image are set to the default action in the new process
  image. Signals set to be ignored (SIG_IGN) by the calling process
  image are set to be ignored by the new process image. Signals set to
  be caught by the calling process image are set to the default action
  in the new process image (see <signal.h>).

And neither does it reset signal masks or flags.

In order to be transparent, when spawning new child processes to debug
(with "run", etc.), reset signal actions and mask back to what was
originally inherited from gdb/gdbserver's parent, just before execing
the target program to debug.

gdb/ChangeLog:
2016-08-09  Pedro Alves  <palves@redhat.com>

	PR gdb/18653
	* Makefile.in (SFILES): Add
	common/signals-state-save-restore.c.
	(HFILES_NO_SRCDIR): Add common/signals-state-save-restore.h.
	(COMMON_OBS): Add signals-state-save-restore.o.
	(signals-state-save-restore.o): New rule.
	* configure: Regenerate.
	* fork-child.c: Include "signals-state-save-restore.h".
	(fork_inferior): Call restore_original_signals_state.
	* main.c: Include "signals-state-save-restore.h".
	(captured_main): Call save_original_signals_state.
	* common/common.m4: Add sigaction to AC_CHECK_FUNCS checks.
	* common/signals-state-save-restore.c: New file.
	* common/signals-state-save-restore.h: New file.

gdb/gdbserver/ChangeLog:
2016-08-09  Pedro Alves  <palves@redhat.com>

	PR gdb/18653
	* Makefile.in (OBS): Add signals-state-save-restore.o.
	(signals-state-save-restore.o): New rule.
	* config.in: Regenerate.
	* configure: Regenerate.
	* linux-low.c: Include "signals-state-save-restore.h".
	(linux_create_inferior): Call
	restore_original_signals_state.
	* server.c: Include "dispositions-save-restore.h".
	(captured_main): Call save_original_signals_state.

gdb/testsuite/ChangeLog:
2016-08-09  Pedro Alves  <palves@redhat.com>

	PR gdb/18653
	* gdb.base/signals-state-child.c: New file.
	* gdb.base/signals-state-child.exp: New file.
	* gdb.gdb/selftest.exp (do_steps_and_nexts): Add new pattern.
2016-08-09 20:16:20 +01:00
Roland McGrath
7cfee229f1 Support -pie for arm*-eabi targets.
ld/
	* emulparams/armelf.sh (GENERATE_PIE_SCRIPT): Set to yes.
2016-08-09 12:09:17 -07:00
Jiaming Wei
68994ca2c0 Correct the calculation of the use_counts of merged .got entries.
* elf64-alpha.c (elf64_alpha_copy_indirect_symbol): Fix thinko
	adjusting the use_count of merged .got entries.
2016-08-09 16:18:42 +01:00
Pedro Alves
e5ca03b41d Fix PR gdb/20295: GDB segfaults printing bitfield member of optimized out value
With something like:

  struct A { int bitfield:4; } var;

If 'var' ends up wholly-optimized out, printing 'var.bitfield' crashes
gdb here:

 (top-gdb) bt
 #0  0x000000000058b89f in extract_unsigned_integer (addr=0x2 <error: Cannot access memory at address 0x2>, len=2, byte_order=BFD_ENDIAN_LITTLE)
     at /home/pedro/gdb/mygit/src/gdb/findvar.c:109
 #1  0x00000000005a187a in unpack_bits_as_long (field_type=0x16cff70, valaddr=0x0, bitpos=16, bitsize=12) at /home/pedro/gdb/mygit/src/gdb/value.c:3347
 #2  0x00000000005a1b9d in unpack_value_bitfield (dest_val=0x1b5d9d0, bitpos=16, bitsize=12, valaddr=0x0, embedded_offset=0, val=0x1b5d8d0)
     at /home/pedro/gdb/mygit/src/gdb/value.c:3441
 #3  0x00000000005a2a5f in value_fetch_lazy (val=0x1b5d9d0) at /home/pedro/gdb/mygit/src/gdb/value.c:3958
 #4  0x00000000005a10a7 in value_primitive_field (arg1=0x1b5d8d0, offset=0, fieldno=0, arg_type=0x16d04c0) at /home/pedro/gdb/mygit/src/gdb/value.c:3161
 #5  0x00000000005b01e5 in do_search_struct_field (name=0x1727c60 "bitfield", arg1=0x1b5d8d0, offset=0, type=0x16d04c0, looking_for_baseclass=0, result_ptr=0x7fffffffcaf8,
 [...]

unpack_value_bitfield is already optimized-out/unavailable -aware:

   (...) VALADDR points to the contents of VAL.  If the VAL's contents
   required to extract the bitfield from are unavailable/optimized
   out, DEST_VAL is correspondingly marked unavailable/optimized out.

however, it is not considering the case of the value having no
contents buffer at all, as can happen through
allocate_optimized_out_value.

gdb/ChangeLog:
2016-08-09  Pedro Alves  <palves@redhat.com>

	* value.c (unpack_value_bitfield): Skip unpacking if the parent
	has no contents buffer to begin with.

gdb/testsuite/ChangeLog:
2016-08-09  Pedro Alves  <palves@redhat.com>

	* gdb.dwarf2/bitfield-parent-optimized-out.exp: New file.
2016-08-09 12:04:48 +01:00
GDB Administrator
02183cb7d3 Automatic date update in version.in 2016-08-09 00:00:19 +00:00
Pedro Alves
6a17ca318b Regenerate some target description files
I regenerated all target description .c files from scratch, and got
this spurious diff.

It's a simple mid-air collision - these files were clearly generated
before commit 73b4f516a0 ("maint_print_c_tdesc_cmd: Use type for
TYPE_CODE_FLAGS instead of field_type."), which did the global
s/field_type/type/, and pushed to master afterwards.

gdb/features/ChangeLog:
2016-08-08  Pedro Alves  <palves@redhat.com>

	* features/i386/amd64-avx-mpx-linux.c: Regenerate.
	* features/i386/amd64-avx-mpx.c: Regenerate.
	* features/i386/i386-avx-mpx-linux.c: Regenerate.
	* features/i386/i386-avx-mpx.c: Regenerate.
2016-08-08 15:09:46 +01:00
Nick Clifton
d8024a9189 Fix seg-faults when running readelf on fuzzed binaries.
PR binutils/20440
	* dwarf.c (display_debug_lines_decoded): Add checks for running
	off the end of the section when populating the directory table and
	file table.
	(frame_display_row): Set max_regs equal to ncols.
	(load_specific_debug_section): If the section is compressed, but
	it is not big enough to hold a compression header then warn and
	return 0.
2016-08-08 13:20:04 +01:00
Nick Clifton
8a286b6345 Fix memory leaks in chew program.
* doc/chew.c (delete_string): Only free the string buffer if it is
	there.  Mark the buffer as NULL after freeing.
	(drop): Free the dropped string.
	(free_words): New function: Frees the memory allocated to the
	dictionary.
	(add_instrinsic): Duplicate the name string, so that it can be
	freed later on.
	(compile): Free unused words.
	(main): Free the dictionary and top level string buffers at the
	end.
2016-08-08 12:19:29 +01:00
Nick Clifton
db9537d2b7 Fix seg-fault in DWARF dumper when given a corrupt binary containing illegal directory and file table indicies.
PR binutils/20439
	* dwarf.c (display_debug_lines_decoded): Check directory and file
	indicies before using them to access directory and file tables.
2016-08-08 09:34:32 +01:00
GDB Administrator
f091cf0294 Automatic date update in version.in 2016-08-08 00:00:22 +00:00
GDB Administrator
8e8fe55a60 Automatic date update in version.in 2016-08-07 00:00:11 +00:00
GDB Administrator
d6d4df4a93 Automatic date update in version.in 2016-08-06 00:00:20 +00:00
Simon Marchi
c632e428c2 Remove unused cli_command_loop declaration
This declaration is not used anymore.

gdb/ChangeLog:

	* event-top.h (cli_command_loop): Remove.
2016-08-05 16:26:18 -04:00
H.J. Lu
ed1b027aa0 Add missing ChangLog enrtry 2016-08-05 13:15:16 -07:00
Pedro Alves
3906a8fc77 Fix PR remote/20398: File-IO write always outputs "Quit"
Commit bb7c96deb1 ("gdb/remote-fileio.c: Eliminate custom SIGINT
signal handler") regressed the File-IO support.

Failed output:

  (gdb) target remote :8888
  Remote debugging using :8888
  0x00008098 in _start ()
  (gdb) c
  Continuing.
  Quit
  Quit
  Quit
  Quit
  Quit
  Quit
  Quit
  Quit
  Quit
  Quit
  Quit
  [Inferior 1 (Remote target) exited normally]

Expected output:

  (gdb) target remote :8888
  Remote debugging using :8888
  0x00008098 in _start ()
  (gdb) c
  Continuing.
  i: 0
  i: 1
  i: 2
  i: 3
  i: 4
  i: 5
  i: 6
  i: 7
  i: 8
  i: 9
  [Inferior 1 (Remote target) exited normally]

The problem that the new File-IO quit handler forgets to check the
quit flag before calling throwing a quit.

gdb/ChangeLog:
2016-08-05  Pedro Alves  <palves@redhat.com>

	PR remote/20398
	* remote-fileio.c (remote_fileio_quit_handler): Check the quit
	flag before calling quit.
2016-08-05 19:54:11 +01:00
Pedro Alves
69ffd7f270 gdb/NEWS: Mention that C++ is now the default
gdb/ChangeLog:
2016-08-05  Pedro Alves  <palves@redhat.com>

	* NEWS: Mention that GDB and GDBserver build with a C++ compiler
	by default.
2016-08-05 17:09:31 +01:00
Pedro Alves
1baf514936 gdb/configure --help: suggest --disable-build-with-cxx instead of --enable...
We build by default with a C++ compiler, but "configure --help" still
says "--enable-build-with-cxx", which hints that it is by default
disabled.  Update the --help text.

gdb/ChangeLog:
2016-08-05  Pedro Alves  <palves@redhat.com>

	* build-with-cxx.m4: Change help string to be in terms of
	--disable-build-with-cxx.
	* configure: Regenerate.

gdb/gdbserver/ChangeLog:
2016-08-05  Pedro Alves  <palves@redhat.com>

	* configure: Regenerate.
2016-08-05 16:54:29 +01:00
Nick Clifton
b126985ec3 Ensure ARM VPUSH and VPOP instructions do not affect more than 16 registers.
PR gas/20429
	* config/tc-arm.c (do_vfp_nsyn_push): Check that no more than 16
	registers are pushed.
	(do_vfp_nsyn_pop): Check that no more than 16 registers are
	popped.
	* testsuite/gas/arm/pr20429.s: New test.
	* testsuite/gas/arm/pr20429.d: New test driver.
	* testsuite/gas/arm/pr20429.1: Expected error output.
2016-08-05 11:26:13 +01:00
Nick Clifton
7ea12e5c3a Fix the generation of alignment frags in code sections for AArch64.
PR gas/20364
	* config/tc-aarch64.c (s_ltorg): Change the mapping state after
	aligning the frag.
	(aarch64_init): Treat rs_align frags in code sections as
	containing code, not data.
	* testsuite/gas/aarch64/pr20364.s: New test.
	* testsuite/gas/aarch64/pr20364.d: New test driver.
2016-08-05 10:37:57 +01:00
GDB Administrator
cca8e7e482 Automatic date update in version.in 2016-08-05 00:00:22 +00:00
Thomas Preud'homme
54ddd295b5 2016-08-04 Thomas Preud'homme <thomas.preudhomme@arm.com>
bfd/
	* bfd-in.h (bfd_elf32_arm_set_target_relocs): Add one parameter.
	* bfd-in2.h: Regenerate.
	* elf32-arm.c (struct elf32_arm_link_hash_table): Declare new
	cmse_implib field.
	(bfd_elf32_arm_set_target_relocs): Add new parameter to initialize
	cmse_implib field in struct elf32_arm_link_hash_table.
	(elf32_arm_filter_cmse_symbols): New function.
	(elf32_arm_filter_implib_symbols): Likewise.
	(elf_backend_filter_implib_symbols): Define to
	elf32_arm_filter_implib_symbols.

ld/
	* emultempl/armelf.em (cmse_implib): Declare and define this new
	static variable.
	(arm_elf_create_output_section_statements): Add new cmse_implib
	parameter.
	(OPTION_CMSE_IMPLIB): Define macro.
	(PARSE_AND_LIST_LONGOPTS): Add entry for new --cmse-implib switch.
	(PARSE_AND_LIST_OPTIONS): Likewise.
	(PARSE_AND_LIST_ARGS_CASES): Handle OPTION_CMSE_IMPLIB case.
	* ld.texinfo (--cmse-implib): Document new option.
	* testsuite/ld-arm/arm-elf.exp
	(Secure gateway import library generation): New test.
	(Secure gateway import library generation: errors): Likewise.
	* testsuite/ld-arm/cmse-implib.s: New file.
	* testsuite/ld-arm/cmse-implib-errors.out: Likewise.
	* testsuite/ld-arm/cmse-implib.rd: Likewise.
2016-08-04 15:54:57 +01:00
Thomas Preud'homme
4ba2ef8fbe 2016-08-04 Thomas Preud'homme <thomas.preudhomme@arm.com>
bfd/
	* elf32-arm.c (CMSE_PREFIX): Define macro.
	(elf32_arm_stub_cmse_branch_thumb_only): Define stub sequence.
	(cmse_branch_thumb_only): Declare stub.
	(struct elf32_arm_link_hash_table): Define cmse_stub_sec field.
	(elf32_arm_get_plt_info): Add globals parameter.  Use it to return
	FALSE if there is no PLT.
	(arm_type_of_stub): Adapt to new elf32_arm_get_plt_info signature.
	(elf32_arm_final_link_relocate): Likewise.
	(elf32_arm_gc_sweep_hook): Likewise.
	(elf32_arm_gc_mark_extra_sections): Mark sections holding ARMv8-M
	secure entry functions.
	(arm_stub_is_thumb): Add case for arm_stub_cmse_branch_thumb_only.
	(arm_dedicated_stub_output_section_required): Change to a switch case
	and add a case for arm_stub_cmse_branch_thumb_only.
	(arm_dedicated_stub_output_section_required_alignment): Likewise.
	(arm_stub_dedicated_output_section_name): Likewise.
	(arm_stub_dedicated_input_section_ptr): Likewise and remove
	ATTRIBUTE_UNUSED for htab parameter.
	(arm_stub_required_alignment): Likewise.
	(arm_stub_sym_claimed): Likewise.
	(arm_dedicated_stub_section_padding): Likewise.
	(cmse_scan): New function.
	(elf32_arm_size_stubs): Call cmse_scan for ARM M profile targets.
	Set stub_changed to TRUE if such veneers were created.
	(elf32_arm_swap_symbol_in): Add detection code for CMSE special
	symbols.

include/
	* arm.h (ARM_GET_SYM_CMSE_SPCL): Define macro.
	(ARM_SET_SYM_CMSE_SPCL): Likewise.

ld/
	* ld.texinfo (Placement of SG veneers): New concept entry.
	* testsuite/ld-arm/arm-elf.exp
	(Secure gateway veneers: no .gnu.sgstubs section): New test.
	(Secure gateway veneers: wrong entry functions): Likewise.
	(Secure gateway veneers (ARMv8-M Baseline)): Likewise.
	(Secure gateway veneers (ARMv8-M Mainline)): Likewise.
	* testsuite/ld-arm/cmse-veneers.s: New file.
	* testsuite/ld-arm/cmse-veneers.d: Likewise.
	* testsuite/ld-arm/cmse-veneers.rd: Likewise.
	* testsuite/ld-arm/cmse-veneers.sd: Likewise.
	* testsuite/ld-arm/cmse-veneers-no-gnu_sgstubs.out: Likewise.
	* testsuite/ld-arm/cmse-veneers-wrong-entryfct.out: Likewise.
2016-08-04 15:36:52 +01:00
Stefan Trleman
024425668d Fix generation of relocs for 32-bit Sparc Solaris targets.
PR gas/20427
	* config/tc-sparc.c (cons_fix_new_sparc): Prevent the generation
	of 64-bit relocation types when assembling for a 32-bit Solaris
	target.
2016-08-04 14:57:23 +01:00
Yao Qi
6f67973b42 Determine target description for native aarch64
I find the following test fail when I test native aarch64 gdb with
arm program,

(gdb) PASS: gdb.base/attach-pie-noexec.exp: attach
set architecture arm^M
warning: Selected architecture arm is not compatible with reported target architecture aarch64^M
Architecture `arm' not recognized.^M
The target architecture is set automatically (currently aarch64)^M
(gdb) FAIL: gdb.base/attach-pie-noexec.exp: set architecture arm

GDB thinks the target is aarch64, but it isn't.  Nowadays, we are
using some entries AT_PHENT and AT_HWCAP in auxv to determine whether
the process is a 32-bit arm one or 64-bit aarch64 one, and get the
right gdbarch.  However, in the process of parsing auxv (in
inf_ptrace_auxv_parse), the size of int and data pointer of
target_gdbarch is used.  If debug program exists (in most of cases),
target_gdbarch is already set according to the debug program, which
is arm in my case.  Then, GDB can parse auxv successfully.  However,
in gdb.base/attach-pie-noexec.exp, the debug program is removed,
target_gdbarch is aarch64 when GDB parse auxv, so GDB can't parse
it successfully.

Instead of using auxv, we check the return value of ptrace NT_ARM_VFP.
If the program is an arm process, NT_ARM_VFP is OK, otherwise, error
is returned.

Additionally, we only return tdesc_arm_with_neon for arm process,
because neon is mandatory on ARMv8.

gdb:

2016-08-04  Yao Qi  <yao.qi@linaro.org>

	* aarch64-linux-nat.c (tdesc_arm_with_vfpv3): Remove the
	declaration.
	(aarch64_linux_read_description): Remove code on getting
	auxv and select target description on it.  Select target
	description by the result of NT_ARM_VFP ptrace request.
2016-08-04 11:39:19 +01:00
Yao Qi
fcd4a73d7d Quiet ptrace error ESRCH in regsets_fetch_inferior_registers
When I run process-dies-while-detaching.exp with GDBserver, I see many
warnings printed by GDBserver,

ptrace(regsets_fetch_inferior_registers) PID=26183: No such process
ptrace(regsets_fetch_inferior_registers) PID=26183: No such process
ptrace(regsets_fetch_inferior_registers) PID=26184: No such process
ptrace(regsets_fetch_inferior_registers) PID=26184: No such process

regsets_fetch_inferior_registers is called when GDBserver resumes each
lwp.

 #2  0x0000000000428260 in regsets_fetch_inferior_registers (regsets_info=0x4690d0 <aarch64_regsets_info>, regcache=0x31832020)
    at /home/yao/SourceCode/gnu/gdb/git/gdb/gdbserver/linux-low.c:5412
 #3  0x00000000004070e8 in get_thread_regcache (thread=0x31832940, fetch=fetch@entry=1) at /home/yao/SourceCode/gnu/gdb/git/gdb/gdbserver/regcache.c:58
 #4  0x0000000000429c40 in linux_resume_one_lwp_throw (info=<optimized out>, signal=0, step=0, lwp=0x31832830)
    at /home/yao/SourceCode/gnu/gdb/git/gdb/gdbserver/linux-low.c:4463
 #5  linux_resume_one_lwp (lwp=0x31832830, step=<optimized out>, signal=<optimized out>, info=<optimized out>)
    at /home/yao/SourceCode/gnu/gdb/git/gdb/gdbserver/linux-low.c:4573

The is the case that threads are disappeared when GDB/GDBserver resumes
them.  We check errno for ESRCH, and don't print error messages, like
what we are doing in regsets_store_inferior_registers.

gdb/gdbserver:

2016-08-04  Yao Qi  <yao.qi@linaro.org>

	* linux-low.c (regsets_fetch_inferior_registers): Check
	errno is ESRCH or not.
2016-08-04 10:44:18 +01:00
GDB Administrator
dabcfa6ef3 Automatic date update in version.in 2016-08-04 00:00:19 +00:00
Tom Tromey
282a0691a7 PR python/18565 - make Frame.function work for inline frames
PR python/18565 notes that calling frame filters don't work properly for
inlined functions.  This happens because Frame.function on an inline
frame will yield the wrong result.  This patch changes this code to use
find_frame_funname instead, which handles inline frames properly.

Built and regtested on x86-64 Fedora 24.

2016-08-03  Tom Tromey  <tom@tromey.com>

	PR python/18565:
	* python/py-frame.c (frapy_function): Use find_frame_funname.

2016-08-03  Tom Tromey  <tom@tromey.com>

	PR python/18565:
	* gdb.python/py-frame-inline.exp: Add Frame.function test.
2016-08-03 09:04:08 -06:00
Tom Tromey
d10153cfc6 Avoid potential memory leak in find_frame_funname
The PR 18565 thread pointed out that, if cp_remove_params can throw
(we aren't quite sure), then find_frame_funname could leak some
memory.  This patch avoids any potential issue by rearranging some
code in find_frame_funname.

Built and regtested on x86-64 Fedora 24.

2016-08-03  Tom Tromey  <tom@tromey.com>

	* stack.c (find_frame_funname): Avoid any possible leak in case
	cp_remove_params can throw.
2016-08-03 09:04:08 -06:00
Tom Tromey
8d2a0a14e5 Update NEWS to mention Python breakpoint events
An earlier patch added three new breakpoint-related events to the
Python API.  However, at that time, I forgot to update NEWS.  This
patch supplies the missing entry.

2016-08-03  Tom Tromey  <tom@tromey.com>

	* NEWS: Mention new Python breakpoint events.
2016-08-03 08:14:23 -06:00
GDB Administrator
f72b087237 Automatic date update in version.in 2016-08-03 00:00:18 +00:00