Commit Graph

86420 Commits

Author SHA1 Message Date
Marcin Kościelnicki
99e8eb11cf gdb.trace: Fix write_inferior_data_ptr on 32-bit big-endian machines.
Noticed and tested on 31-bit s390.  This bug caused completely broken
fast tracepoints.

gdb/gdbserver/ChangeLog:

	* tracepoint.c (write_inferior_data_ptr): Cast to uintptr_t, so that
	it works properly on big-endian machines where sizeof (CORE_ADDR)
	!= sizeof (void *).
2016-01-22 15:03:47 +01:00
Yao Qi
1ac78c0444 [testsuite] Unbuffer the output in gdb.base/multi-forks.c
This patch unbuffer the output of the program so that the test harness
can count the number of "done" from output correctly.

gdb/testsuite:

2016-01-22  Yao Qi  <yao.qi@linaro.org>

	PR testsuite/19491
	* gdb.base/multi-forks.c: Include
	../lib/unbuffer_output.c
	(main): Call gdb_unbuffer_output.
2016-01-22 09:02:11 +00:00
Yao Qi
d86feca31b [ARM] perror_with_name when failed to fetch/store registers
I see the following test fail on native arm-linux gdb testing...

(gdb) PASS: gdb.base/killed-outside.exp: registers: get pid of inferior
Executing on target: kill -9 2346    (timeout = 300)
spawn kill -9 2346^M
flushregs^M
Register cache flushed.^M
warning: Unable to fetch general registers.^M
PC not available^M
(gdb) PASS: gdb.base/killed-outside.exp: registers: flushregs
info threads^M
  Id   Target Id         Frame ^M
* 1    process 2346 "killed-outside" (gdb) FAIL: gdb.base/killed-outside.exp: registers: info threads (timeout)

since the inferior disappeared, ptrace will fail.  In that case, the
exception should be thrown, so that the caller can handle that.

gdb:

2016-01-22  Yao Qi  <yao.qi@linaro.org>

	* arm-linux-nat.c (fetch_fpregs): Call perror_with_name
	instead of warning.
	(store_fpregs, fetch_regs, store_regs): Likewise.
	(fetch_wmmx_regs, store_wmmx_regs): Likewise.
	(fetch_vfp_regs, store_vfp_regs): Likewise.
2016-01-22 09:01:09 +00:00
Doug Evans
b35a8b2f1f * breakpoint.c (init_breakpoint_sal): Add comment. 2016-01-21 17:03:10 -08:00
Doug Evans
4f5946a863 * lib/ada.exp (gdb_compile_ada): Fix typo. 2016-01-21 16:20:02 -08:00
GDB Administrator
e36f6033bf Automatic date update in version.in 2016-01-22 00:00:08 +00:00
Marcin Kościelnicki
f906b85701 gdb.trace: Fix string collection for 64-bit platforms.
String collection always used ref32 to fetch the string pointer.  Make it
use gen_fetch instead.

As a side effect, this patch changes dup+const+trace+pop sequence used
for collecting the string's address to a trace_quick opcode.  This
results in a shorter agent expression.

This appeared to work on x86_64 since it's a little-endian platform, and
malloc (used in gdb.trace/collection.exp) returns addresses in low 4GB.
Noticed and tested on s390x-ibm-linux-gnu, also tested on
i686-unknown-linux-gnu and x86_64-unknown-linux-gnu.

gdb/ChangeLog:

	* ax-gdb.c (gen_traced_pop): Use gen_fetch for string collection.
2016-01-21 17:36:27 +01:00
Nick Clifton
dfc4394024 Fix linker testsuite failures for ARM netbsdelf target.
PR ld/19453
	* testsuite/ld-arm/arm-elf.exp: Skip tests that do not work for
	the arm-netbsdelf target.
2016-01-21 15:20:57 +00:00
Nick Clifton
61e137e281 Fix gas testsuite failures for ARM netbesdelf configuration.
PR gas/19454
	* testsuite/gas/arm/mapshort-elf.d: Fix expected output to cope
	with arm-netbsdelf target.
	* testsuite/gas/arm/blx-bl-convert.d: Skip for netbsdelf.
2016-01-21 14:39:34 +00:00
Nick Clifton
23a4208915 Fix compile time errors building ARC target on a 32-bit host.
* elf32-arc.c (ADD_RELA): Fix compile time warning errors by
	changing the type of _loc to be bfd_byte *.
	(elf_arc_finish_dynamic_symbol): Likewise.
2016-01-21 13:54:11 +00:00
Andrew Burgess
4a099de2e7 gdb: Small cleanup to disasm.c:maybe_add_dis_line_entry
Give the function a better name (drop "maybe_") and update the header
comment.

gdb/ChangeLog:

	* disasm.c (maybe_add_dis_line_entry): Rename to...
	(add_dis_line_entry): ...this, and update header comment.
	(do_mixed_source_and_assembly): Now use add_dis_line_entry.
2016-01-21 12:56:25 +01:00
Pedro Alves
a994041db3 gdb: Respect CXXFLAGS when building with C++ compiler
Currently, even when built with --enable-build-with-cxx, gdb uses
CFLAGS instead of CXXFLAGS.  This commit fixes it.

CXXFLAGS set in the environment when configure was run is now honored
in the generated gdb/Makefile, and you can also override CXXFLAGS in
the command like at make time, with the usual 'make CXXFLAGS="..."'

Objects built with a C compiler (e.g., gnulib) still honor CFLAGS
instead.

gdb/ChangeLog:
2016-01-21  Pedro Alves  <palves@redhat.com>

	* Makefile.in (COMPILER_CFLAGS): New.
	(CXXFLAGS): Get it from configure.
	(INTERNAL_CFLAGS_BASE, INTERNAL_LDFLAGS): Use COMPILER_CFLAGS
	instead of CFLAGS.
	* build-with-cxx.m4 (GDB_AC_BUILD_WITH_CXX): Set and AC_SUBST
	COMPILER_CFLAGS.
	* configure: Regenerate.

gdb/gdbserver/ChangeLog:
2016-01-21  Pedro Alves  <palves@redhat.com>

	* Makefile.in (COMPILER_CFLAGS, CXXFLAGS): New.
	(INTERNAL_CFLAGS_BASE): Use COMPILER_CFLAGS instead of CFLAGS.
	* configure: Regenerate.
2016-01-21 11:18:45 +00:00
Nick Clifton
aebf9be708 Fix unexpected failures in the linker testsuite for ARM VxWorks targets.
PR ld/19455
	* elf32-arm.c (elf32_arm_create_dynamic_sections): Set the ELF
	class of the linker stub bfd.
	(elf32_arm_check_relocs): Skip check for pic format after
	processing a vxWorks R_ARM_ABS12 reloc.
	* elflink.c (bfd_elf_final_link): Check for ELFCLASSNONE when
	reporting a class mismatch.

	* testsuite/ld-arm/vxworks1-lib.dd: Update for current
	disassmebler output.
	* testsuite/ld-arm/vxworks1-lib.rd: Likewise.
	* testsuite/ld-arm/vxworks1.dd: Likewise.
	* testsuite/ld-arm/vxworks1.rd: Likewise.
	* testsuite/ld-arm/vxworks1.ld: Set the output format.
2016-01-21 10:51:25 +00:00
Joel Brobecker
305e13e67f Fix regression introduced in "break *<EXPR>" by explicit location patches.
A relatively recent patch support for explicit locations, and part
of that patch cleaned up the way we parse breakpoint locations.
Unfortunatly, a small regression crept in for "*<EXPR>" breakpoint
locations. In particular, on PIE programs, one can see the issue by
doing the following, with any program:

    (gdb) b *main
    Breakpoint 1 at 0x51a: file hello.c, line 3.
    (gdb) run
    Starting program: /[...]/hello
    Error in re-setting breakpoint 1: Warning:
    Cannot insert breakpoint 1.
    Cannot access memory at address 0x51a

    Warning:
    Cannot insert breakpoint 1.
    Cannot access memory at address 0x51a

Just for the record, this regression was introduced by:

    commit a06efdd6ef
    Date:   Tue Aug 11 17:09:35 2015 -0700
    Subject: Explicit locations: introduce address locations

What happens is that the patch makes the implicit assumption that
the address computed the first time is static, as if it was designed
to only support litteral expressions (Eg. "*0x1234"). This allows
the shortcut of not re-computing the breakpoint location's address
when re-setting breakpoints.

However, this does not work in general, as demonstrated in the example
above.

This patch plugs that hole simply by saving the original expression
used to compute the address as part of the address location, so as
to then re-evaluate that expression during breakpoint re-set.

gdb/ChangeLog:

        * location.h (new_address_location): Add new parameters
        "addr_string" and "addr_string_len".
        (get_address_string_location): Add declaration.
        * location.c (new_address_location): Add new parameters
        "addr_string" and "addr_string_len".  If not NULL, store
        a copy of the addr_string in the new location as well.
        (get_address_string_location): New function.
        (string_to_event_location): Update call to new_address_location.
        * linespec.c (event_location_to_sals) <ADDRESS_LOCATION>:
        Save the event location in the parser's state before
        passing it to convert_address_location_to_sals.
        * breakpoint.c (create_thread_event_breakpoint): Update call
        to new_address_location.
        (init_breakpoint_sal): Get the event location's string, if any,
        and use it to update call to new_address_location.
        * python/py-finishbreakpoint.c (bpfinishpy_init):
        Update call to new_address_location.
        * spu-tdep.c (spu_catch_start): Likewise.

        * config/djgpp/fnchange.lst: Add entries for
        gdb/testsuite/gdb.base/break-fun-addr1.c and
        gdb/testsuite/gdb.base/break-fun-addr2.c.

gdb/testsuite/ChangeLog:

        * gdb.base/break-fun-addr.exp: New file.
        * gdb.base/break-fun-addr1.c: New file.
        * gdb.base/break-fun-addr2.c: New file.
2016-01-21 14:23:15 +04:00
Jiong Wang
2f340668a9 [AArch64] Relax long branch veneer insertion for non STT_FUNC symbol
As defined at AArch64 ELF Specification (4.6.7 Call and Jump
  relocations), symbol with type of non STT_FUNC but in different input
  section with relocation place should insert long branch veneer also.

  Meanwhile the current long branch veneer infrastructure havn't considered
  the situation where the branch destination is "sym_value + rela->addend".

  This was OK because we only insert veneer for long call destination is
  STT_FUNC symbol for which the addend is always zero. But as we relax the
  support to other situations by this patch, we need to handle addend be
  non-zero value. For example, for static function, relocation against
  "local symbol" are turned into relocation against "section symbol + offset"
  where there is a valid addend.

  bfd/
	* elfnn-aarch64.c (aarch64_type_of_stub): Allow insert long branch
	veneer for sym_sec != input_sec.
	(elfNN_aarch64_size_stub): Support STT_SECTION symbol.
	(elfNN_aarch64_final_link_relocate): Take rela addend into account when
	calculation destination.

  ld/
	* testsuite/ld-aarch64/farcall-section.d: Delete.
	* testsuite/ld-aarch64/farcall-section.s: Delete.
	* testsuite/ld-aarch64/farcall-b-section.d: New expectation file.
	* testsuite/ld-aarch64/farcall-bl-section.d: Likewise.
	* testsuite/ld-aarch64/farcall-b-section.s: New testcase.
	* testsuite/ld-aarch64/farcall-bl-section.s: Likewise.
	* testsuite/ld-aarch64/aarch64-elf.exp: Likewise.
2016-01-21 09:57:09 +00:00
Alan Modra
aeb7056972 Convert macros in elf-linux-core.h to inline functions
Besides changing some macros into inline functions, this removes
redundant memsets and uses bfd_put_* rather than H_PUT_*.

	* elf-linux-core.h (swap_linux_prpsinfo32_out): New function.
	(swap_linux_prpsinfo64_out): New function.
	(LINUX_PRPSINFO32_SWAP_FIELDS): Delete.
	(LINUX_PRPSINFO64_SWAP_FIELDS): Delete.
	* elf.c (elfcore_write_linux_prpsinfo32): Adjust.  Don't memset.
	(elfcore_write_linux_prpsinfo64): Likewise.
	* elf32-ppc.c (swap_ppc_linux_prpsinfo32_out): New function.
	(PPC_LINUX_PRPSINFO32_SWAP_FIELDS): Delete.
	(elfcore_write_ppc_linux_prpsinfo32): Adjust.  Don't memset.
2016-01-21 19:59:33 +10:30
Alan Modra
de64ce13a7 Rename elf-linux-psinfo.h to elf-linux-core.h
Since it will sometime have more than just prpsinfo.  Also,
elf32-ppc.c needlessly includes this header.

	* elf-linux-core.h: Rename from elf-linux-psinfo.h.
	* elf.c: Adjust #include.
	* elf32-ppc.c: Don't #include elf-linux-psinfo.h
	* Makefile.am (SOURCE_HFILES): Update.
	* Makefile.in: Regenerate.
	* po/SRC-PORFILES.in: Regenerate.
2016-01-21 19:59:33 +10:30
Alan Modra
c603b11bec bfd/configure reorganisation
Corefile code should be moved after running config.bfd, because it
uses want64.

	* configure.ac: Move corefile selection later in file.  Move
	tdefaults code immediately after other target vector code.
	* configure: Regenerate.
2016-01-21 19:59:33 +10:30
Yao Qi
f7a6a40dbc Detect the arm/thumb mode of code SIGRETURN or RT_SIGRETURN returns to
This patch fixes the following regression introduced by commit d0e59a68

step^M
39      } /* handler */^M
1: x/i $pc^M
=> 0x8740 <handler+80>: sub     sp, r11, #0^M
(gdb) step^M
^M
Program received signal SIGSEGV, Segmentation fault.^M
setitimer () at ../sysdeps/unix/syscall-template.S:81^M
81      ../sysdeps/unix/syscall-template.S: No such file or directory.^M
1: x/i $pc^M
=> 0xb6eff9c0 <setitimer>:      push    {r7}^M
(gdb) FAIL: gdb.base/sigstep.exp: continue to handler, si+advance in handler, step from handler: leave handler

in my test setting, program is compiled in arm mode, but the glibc
is built in thumb mode, so when we do 'step' to step over syscall
instruction svc for SIGRETURN, GDB should set breakpoint for arm mode
in the program, even though the current program in glibc is in thumb
mode.  Current GDB doesn't consider the case that the mode of program
SIGRETURN goes to can be different from current program mode.

In fact, GDB has taken care of this arm/thumb mode changes already,
see

/* Copy the value of next pc of sigreturn and rt_sigrturn into PC,
   return 1.  In addition, set IS_THUMB depending on whether we
   will return to ARM or Thumb code.  Return 0 if it is not a
   rt_sigreturn/sigreturn syscall.  */
static int
arm_linux_sigreturn_return_addr (struct frame_info *frame,
				 unsigned long svc_number,
				 CORE_ADDR *pc, int *is_thumb)

but in the commit d0e59a68

> -  arm_linux_sigreturn_return_addr (frame, svc_number, &return_addr, &is_thumb);
> +  if (svc_number == ARM_SIGRETURN || svc_number == ARM_RT_SIGRETURN)
> +    next_pc = arm_linux_sigreturn_next_pc (regcache, svc_number);

the IS_THUMB setting is lost, so it is a regression.

gdb:

2016-01-21  Yao Qi  <yao.qi@linaro.org>

	* arm-linux-tdep.c (arm_linux_sigreturn_next_pc): Add parameter
	is_thumb and set it according to CPSR saved on the stack.
	(arm_linux_get_next_pcs_syscall_next_pc): Pass is_thumb to
	arm_linux_sigreturn_next_pc.

gdb/gdbserver:

2016-01-21  Yao Qi  <yao.qi@linaro.org>

	* linux-arm-low.c (arm_sigreturn_next_pc): Add parameter
	is_thumb and set it according to CPSR saved on the stack.
	(get_next_pcs_syscall_next_pc): Pass is_thumb to
	arm_sigreturn_next_pc.
2016-01-21 07:48:50 +00:00
GDB Administrator
7304afd662 Automatic date update in version.in 2016-01-21 00:00:08 +00:00
Simon Marchi
5f5dfff63f Fix sorting of enum values in FlagEnumerationPrinter
The lambda function used to sort the enumerator list does not work
properly.  This list consists of tuples, (enum label, enum value).  The
key function returns x.enumval.  enumval not being defined for a tuple,
we see this exception in the test log:

  Python Exception <class 'AttributeError'> 'tuple' object has no attribute 'enumval'

The function should return the second item of the tuple, which is the
enumval.

The pretty-printer still worked mostly correctly, except that the
enumeration values were not sorted.  The test still passed because the
enumeration values are already sorted where they are defined.  The test
also passed despite the exception being printed, because the right output
was printed after the exception:

  print (enum flag_enum) (FLAG_1)
  Python Exception <type 'exceptions.AttributeError'> 'tuple' objecthas no attribute 'enumval':M
  $7 = 0x1 [FLAG_1]
  (gdb) PASS: gdb.python/py-pp-maint.exp: print FLAG_1

New in v2:

- Improved test case, I stole Pedro's example directly.  It verifies
  that the sorting of enumerators by value works, by checking that
  printing FOO_MASK appears as FOO_1 | FOO_2 | FOO_3.

  I noticed that I could change the regexps to almost anything and the
  tests would still pass.  I think it was because of the | in there.  I
  made them more robust by using string_to_regexp.  I used curly braces
  { } instead of quoting marks " " for strings, so that I could use
  square brackets [ ] in them without having to escape them all.  I also
  removed the "message" part of the tests, since they are redundant with
  the command, and it's just more maintenance to have to update them.

  Tested with Python 2.7 and 3.5.

gdb/ChangeLog:

	* python/lib/gdb/printing.py (FlagEnumerationPrinter.__call__):
	Fix enumerators sort key function.

gdb/testsuite/ChangeLog:

	* gdb.python/py-pp-maint.exp: Change/add enum flag tests.
	* gdb.python/py-pp-maint.c (enum flag_enum): Use more complex
	enum flag values.
2016-01-20 13:44:33 -05:00
Andreas Arnez
fd356fa288 gnu_vector.exp: Respect `should_kfail' for PR 8549
The gnu_vector test case yields a new FAIL on s390x:

  FAIL: gdb.base/gnu_vector.exp: verify vector return value

It was introduced by commit 77ae9c1933 "gdb.base/gnu_vector.exp:
Don't test output from the inferior".  That commit dropped the special
handling for GDB's inability (on some targets) to set the return value.

This change re-establishes the logic from before, converting the above
FAIL to a KFAIL (PRMS gdb/8549).

gdb/testsuite/ChangeLog:

	* gdb.base/gnu_vector.exp: Re-establish handling for should_kfail
	when GDB can not set the vector return value.  Add more comments
	for clarification.
2016-01-20 19:41:45 +01:00
Antoine Tremblay
9df22175e1 Fix missing IPA lib in tspeed.exp in some configurations.
On Ubuntu 14.04 the following failure would be seen when running the
tspeed.exp test on a target that supports fast tracepoints like x86_64:

Target returns error code '.In-process agent library not loaded in
process.  Fast and static tracepoints unavailable.'.
(gdb) FAIL: gdb.trace/tspeed.exp: start trace experiment

This is because the default is to link with --as-needed and the
gdb_compile for the test is using the libs argument instead of shlib which
corrects this issue since 6ebea266fd by
adding -Wl,--no-as-needed.

This patch fixes the issue by passing the lib as the shlib argument to
gdb_compile.

Tested on Ubuntu 14.04 x86_64.

gdb/testsuite/ChangeLog:

	* gdb.trace/tspeed.exp:  Use shlib instead of libs in gdb_compile
	command.
2016-01-20 12:30:53 -05:00
Nick Clifton
74b92a5c75 Fix unexpected failures in GAS testsuite for ARM VxWorks target.
PR 19456
	* testsuite/gas/arm/weakdef-1.d: Skip for VxWorks.
	* testsuite/gas/arm/blx-bl-convert.d
	* testsuite/gas/arm/plt-1.d: Likewise.
	* testsuite/gas/arm/reloc-bad.d: Likewise.
	* testsuite/gas/arm/thumb-w-good.d: Likewise.
	* testsuite/gas/arm/thumb2_pool.d: Likewise.
	* testsuite/gas/arm/ldconst.d: Adjust so that it works with VxWorks
	* testsuite/gas/arm/tls_vxworks.d: Update expected output.
2016-01-20 17:02:42 +00:00
Nick Clifton
72e0b2547d Upda the documentation on assembler error message generation.
PR 19499
	* doc/as.texinfo (Errors): Correct documentation describing the
	interaction of .file and .line with warning and error messages.
2016-01-20 16:21:34 +00:00
Nick Clifton
fdbd3e95ee Fix linker testsuite failures for arm-pe targets.
PR 19457
	* testsuite/ld-scripts/script.exp (extract_symbol_test): Stop test
	early for PE based targets.
	* testsuite/ld-scripts/align.t: Use 0x1000 as VMA alignment.
	* testsuite/ld-pe/tlssec32.d: Allow for relocatable output.
2016-01-20 15:41:06 +00:00
Nick Clifton
aed5fc75ef Skip ARM v8 tests for COFF based targets. 2016-01-20 15:00:57 +00:00
Nick Clifton
0398b8d6c8 Fix dlltool tests for ARM targets, which do not support the --leading-underscore option.
PR 19495
	* testsuite/binutils-all/dlltool.exp: Fix tests for targets which
	do not support inserting leading underscores.
2016-01-20 14:52:33 +00:00
Matthew Wahab
0bff6e2d69 [AArch64] Reject invalid immediate operands to MSR UAO
In the instruction to write to the ARMv8.2 PSTATE field UAO,
MSR UAO, #<imm>, the immediate should be either 0 or 1 but GAS accepts
any unsigned 4-bit integer.

This patch implements the constraint on the immediate, generating an
error if the immediate operand is invalid, and adds tests for the
illegal forms.

opcodes/
2016-01-20  Matthew Wahab  <matthew.wahab@arm.com>

	* aarch64-opc.c (operand_general_constraint_met_p): Check validity
	of MSR UAO immediate operand.

gas/
2016-01-20  Matthew Wahab  <matthew.wahab@arm.com>

	* testsuite/gas/aarch64/armv8_2-a-illegal.d: New.
	* testsuite/gas/aarch64/armv8_2-a-illegal.l: New.
	* testsuite/gas/aarch64/armv8_2-a-illegal.s: New.

Change-Id: Ibdec4967c00b1ef3be9dbc43d23b2c70d1a0b28c
2016-01-20 14:25:46 +00:00
Pedro Alves
b12e5614fb Fix gdb/ChangeLog typo 2016-01-20 13:10:41 +00:00
Pedro Alves
37e42b4fe9 Move ChangeLog entry to proper place (gdb/testsuite/ -> gdb/) 2016-01-20 13:03:40 +00:00
Mickael Guene
91f68a68f9 Add support for an ARM specific 'y' section attribute flag to mark the section as NOREAD.
bfd/ChangeLog:
      * elf32-arm.c ((elf32_arm_special_sections): Remove catch of noread
      section using '.text.noread' pattern.

gas/ChangeLog:
      * config/obj-elf.c (obj_elf_change_section) : Allow arm section with
      SHF_ARM_NOREAD section flag.
      * config/tc-arm.h (md_elf_section_letter) : Implement this hook to
      handle letter 'y'.
     (arm_elf_section_letter) : Declare it.
      * config/tc-arm.c (arm_elf_section_letter): Handle letter 'y' to set
      SHF_ARM_NOREAD section flag.
      * doc/c-arm.texi (ARM section attribute 'y'): Document it.

gas/testsuite/ChangeLog:
      * gas/arm/section-execute-only.s: New test case.
      * gas/arm/section-execute-only.d: Expected output.

ld/testsuite/ChangeLog:
      * ld-arm/thumb1-noread-not-present-mixing-two-section.s: Add 'y'
      attribute usage.
      * ld-arm/thumb1-noread-present-one-section.s: Likewise.
      * ld-arm/thumb1-noread-present-two-section.s: Likewise.
      * ld-arm/thumb1-input-section-flag-match.s: Likewise.

binutils/ChangeLog:
      * readelf.c (get_elf_section_flags): Display y letter for section
      with SHF_ARM_NOREAD section flag in readelf section output.
      (process_section_headers): Add y letter in readelf section output
      key mapping for ARM architecture.
2016-01-20 12:53:50 +00:00
Joel Brobecker
be56871ee8 minor reformatting in printcmd.c::print_scalar_formatted
(GNU Coding Standard...)

gdb/ChangeLog:

        * printcmd.c (print_scalar_formatted): move binary operator from
        end of line to beginning of next line.  Adjust formatting
        accordingly.
2016-01-20 08:03:44 +04:00
GDB Administrator
e36a770198 Automatic date update in version.in 2016-01-20 00:00:10 +00:00
John Baldwin
f2feec9809 Use a separate variable for the size passed to sysctl.
This fixes a sign mismatch warning.

gdb/ChangeLog:

	* fbsd-nat.c (fbsd_pid_to_exec_file): Use new "buflen" instead of
	"len" with sysctl.
2016-01-19 11:35:19 -08:00
John Baldwin
40068dccc4 Remove an unused variable.
binutils/ChangeLog:

	* readelf.c (get_freebsd_elfcore_note_type): Remove unused variable.
2016-01-19 09:06:33 -08:00
John Baldwin
20a0aab3ed Dump register notes for each thread when generating a FreeBSD core.
gdb/ChangeLog:

	* fbsd-tdep.c (find_stop_signal): Remove.
	(struct fbsd_collect_regset_section_cb) <lwp>: New field.
	<stop_signal>: New field.
	<abort_iteration>: New field.
	(fbsd_collect_regset_section_cb): Use new fields.
	(fbsd_collect_thread_registers): New function.
	(struct fbsd_corefile_thread_data): New structure.
	(fbsd_corefile_thread): New function.
	(fbsd_make_corefile_notes): Use new function to dump notes for each
	non-exited thread in a process.
2016-01-19 08:19:40 -08:00
John Baldwin
6e9567fe2a Add support for LWP-based threads on FreeBSD.
Older versions of FreeBSD supported userland threading via a pure
user-space threading library (N threads scheduled on 1 process) and
a N:M model (N threads scheduled on M LWPs).  However, modern FreeBSD
versions only support a M:M threading model where each user thread is
backed by a dedicated LWP.  This thread target only supports this
threading model.  It also uses ptrace to query and alter LWP state
directly rather than using libthread_db to simplify the implementation.

FreeBSD recently gained support for reporting LWP events (birth and death
of LWPs).  GDB will use LWP events when present.  For older systems it
fetches the list of LWPs in the to_update_thread_list target op to update
the list of threads on each stop.

This target supports scheduler locking by using ptrace to suspend
individual LWPs as necessary before resuming a process.

gdb/ChangeLog:

	* configure.ac: Check for support for LWP names on FreeBSD.
	* fbsd-nat.c [PT_LWPINFO] New variable debug_fbsd_lwp.
	[TDP_RFPPWAIT || HAVE_STRUCT_PTRACE_LWPINFO_PL_TDNAME]
	(fbsd_fetch_kinfo_proc): Move function earlier.
	[PT_LWPINFO] (fbsd_thread_alive): New function.
	[PT_LWPINFO] (fbsd_pid_to_str): New function.
	[HAVE_STRUCT_PTRACE_LWPINFO_PL_TDNAME] (fbsd_thread_name): New function.
	[PT_LWP_EVENTS] (fbsd_enable_lwp_events): New function.
	[PT_LWPINFO] (fbsd_add_threads): New function.
	[PT_LWPINFO] (fbsd_update_thread_list): New function.
	[PT_LWPINFO] New variable super_resume.
	[PT_LWPINFO] (resume_one_thread_cb): New function.
	[PT_LWPINFO] (resume_all_threads_cb): New function.
	[PT_LWPINFO] (fbsd_resume): New function.
	(fbsd_remember_child): Save full ptid instead of plain pid.
	(fbsd_is_child_pending): Return ptid of saved child process.
	(fbsd_wait): Include lwp in returned ptid and switch to LWP ptid on
	first stop.
	[PT_LWP_EVENTS] Handle LWP events.
	[TDP_RFPPWAIT] Include LWP in child ptid.
	(fbsd_post_startup_inferior) [PT_LWP_EVENTS]: Enable LWP events.
	(fbsd_post_attach) [PT_LWP_EVENTS]: Enable LWP events.
	Add threads for existing processes.
	(fbsd_nat_add_target) [PT_LWPINFO]: Set "to_thread_alive" to
	"fbsd_thread_alive".
	Set "to_pid_to_str" to "fbsd_pid_to_str".
	[HAVE_STRUCT_PTRACE_LWPINFO_PL_TDNAME]: Set "to_thread_name" to
	"fbsd_thread_name".
	[PT_LWPINFO]: Set "to_update_thread_list" to "fbsd_update_thread_list".
	Set "to_has_thread_control" to "tc_schedlock".
	Set "to_resume" to "fbsd_resume".
	(_initialize_fbsd_nat): New function.
	* configure: Regenerate.
	* config.in: Regenerate.

gdb/doc/ChangeLog:

	* gdb.texinfo (Debugging Output): Document "set/show debug fbsd-lwp".
2016-01-19 08:19:00 -08:00
John Baldwin
94309df7aa Use LWP IDs with ptrace register requests on FreeBSD.
This allows gdb to fetch per-thread registers for multi-threaded FreeBSD
processes.

Export get_ptrace_pid() from inf-ptrace.c and use it to determine the PID
to pass to ptrace in pan-BSD native targets.  NetBSD and OpenBSD also accept
LWP IDs for ptrace requests to fetch per-thread state.

gdb/ChangeLog:

	* amd64bsd-nat.c (amd64bsd_fetch_inferior_registers): Use
	get_ptrace_pid.
	(amd64bsd_store_inferior_registers): Use get_ptrace_pid.
	(amd64bsd_dr_get): Use get_ptrace_pid.
	(amd64bsd_dr_set): Use get_ptrace_pid.
	* i386bsd-nat.c (i386bsd_fetch_inferior_registers): Use get_ptrace_pid.
	(i386bsd_store_inferior_registers): Use get_ptrace_pid.
	(i386bsd_dr_get): Use get_ptrace_pid.
	(i386bsd_dr_set): Use get_ptrace_pid.
	* inf-ptrace.c (get_ptrace_pid): Export.
	* inf-ptrace.h (get_ptrace_pid): Declare.
	* ppcfbsd-nat.c (ppcfbsd_fetch_inferior_registers): Use lwp id.
	(ppcfbsd_store_inferior_registers): Use lwp id.
2016-01-19 08:18:49 -08:00
John Baldwin
791174281c Display per-thread information for threads in FreeBSD cores.
Display the LWP ID of each thread in a FreeBSD core.  Extract thread
names from the per-thread THRMISC note.

gdb/ChangeLog:

	* fbsd_tdep.c (fbsd_core_pid_to_str): New function.
	(fbsd_core_thread_name): New function.
	(fbsd_init_abi): Add "core_pid_to_str" gdbarch method.
	Add "core_thread_name" gdbarch method.
2016-01-19 08:18:30 -08:00
John Baldwin
4dfc5dbc4e Add support for extracting thread names from cores.
Add a new gdbarch method to extract a thread name from a core for a
given thread.  Use this new method in core_thread_name to implement the
to_thread_name target op.

gdb/ChangeLog:

	* corelow.c (core_thread_name): New function.
	(init_core_ops): Use "core_thread_name" for the "to_thread_name"
	target op.
	* gdbarch.sh (core_thread_name): New gdbarch callback.
	* gdbarch.h: Re-generate.
	* gdbarch.c: Re-generate.
2016-01-19 08:18:20 -08:00
John Baldwin
5b2c414df1 Add a pseudosection for the NT_FREEBSD_THRMISC note.
bfd/ChangeLog:

	* elf.c (elfcore_grok_note): Recognize NT_FREEBSD_THRMISC notes.
2016-01-19 08:15:08 -08:00
John Baldwin
f4ddf30f11 Add support to readelf for reading FreeBSD ELF core notes.
binutils/ChangeLog:

	* readelf.c (get_freebsd_elfcore_note_type): New
	(process_note): Add support for FreeBSD core notes.

include/ChangeLog:

	* elf/common.h (NT_FREEBSD_THRMISC): Define.
	(NT_FREEBSD_PROCSTAT_PROC): Define.
	(NT_FREEBSD_PROCSTAT_FILES): Define.
	(NT_FREEBSD_PROCSTAT_VMMAP): Define.
	(NT_FREEBSD_PROCSTAT_GROUPS): Define.
	(NT_FREEBSD_PROCSTAT_UMASK): Define.
	(NT_FREEBSD_PROCSTAT_RLIMIT): Define.
	(NT_FREEBSD_PROCSTAT_OSREL): Define.
	(NT_FREEBSD_PROCSTAT_PSSTRINGS): Define.
	(NT_FREEBSD_PROCSTAT_AUXV): Define.
2016-01-19 08:15:08 -08:00
Simon Marchi
10e3ed9029 Fix enum flag with Python 3
Using Python 3.5 (I assume it's the same with 3.4 and lower, but I didn't
test), I see this:

  print (enum flag_enum) (FLAG_1)^M
  Python Exception <class 'TypeError'> %x format: an integer is required, not gdb.Value: ^M
  $7 = ^M
  (gdb) FAIL: gdb.python/py-pp-maint.exp: print FLAG_1

Apparently, this idiom, where v is a gdb.Value, was possible with Python 2,
but not with Python 3:

  '%x' % v

In Python 2, it would automatically get converted to an integer.  To solve
it, I simply added wrapped v in a call to int().

  '%x' % int(v)

In Python 2, the int type is implemented with a "long" in C, so on x86-32 it's
32-bits.  I was worried that doing int(v) would truncate the value and give
wrong results for enum values > 32-bits.  However, the int type != the int
function.  The int function does the right thing, selecting the right integer
type for the given value.  I tested with large enum values on x86-32 and
Python 2, and everything works as expected.

gdb/ChangeLog:

	* python/lib/gdb/printing.py (_EnumInstance.to_string): Explicitly
	convert gdb.Value to integer type using int().
2016-01-19 11:07:07 -05:00
Simon Marchi
41d1845eda testsuite: Factor out --status in DO_RUNTEST
gdb/testsuite/ChangeLog:

	* Makefile.in (DO_RUNTEST): Add --status and update usages.
2016-01-19 11:06:11 -05:00
Simon Marchi
01ac68403c Add missing ChangeLog entries for the last 2 commits
I did a wrong manipulation and pushed the last 2 commits without
amending them with the ChangeLog entries.
2016-01-19 10:49:35 -05:00
Simon Marchi
10eadbcc28 testsuite: Add --status to runtest invocation
By default, if a test driver (a test .exp) ends with an uncaught
error/exception, the runtest command will still have a return code of 0
(success).  However, if a test (or the environment) is broken and does
not work properly, it should be considered as failed so that we can
notice it and fix it.

Passing the --status flag to runtest will make it return an error if one
of the test it runs ends up with an uncaught error.

gdb/testsuite/ChangeLog:

	* Makefile.in (check-single): Pass --status to runtest.
	(check/%.exp): Likewise.
2016-01-19 10:45:58 -05:00
Simon Marchi
bef95aacb8 testsuite: Make check-parallel return non-zero if a test failed
When using the check-parallel target, the return code of make is always 0,
regardless of test results.  This patch makes it return the same code as
the "make do-check-parallel" sub-command.  So if there is a FAIL somewhere,
non-zero will be returned by make.

For the sake of example, I introduced a failure in gdb.base/break.exp.

  $ make check-single TESTS="gdb.base/break.exp gdb.python/py-value.exp" && echo 'Success :D' || echo 'Fail :('
  ...
  FAIL: gdb.base/break.exp: allo
  ...
  Fail :(

I think the parallel run should do the same.  Currently:

  $ make check-parallel TESTS="gdb.base/break.exp gdb.python/py-value.exp" && echo 'Success :D' || echo 'Fail :('
  ...
  FAIL: gdb.base/break.exp: allo
  ...
  Success :D

And with the patch (no big surprises there):

  $ make check-parallel TESTS="gdb.base/break.exp gdb.python/py-value.exp" && echo 'Success :D' || echo 'Fail :('
  ...
  FAIL: gdb.base/break.exp: allo
  ...
  Fail :(

What do you think?

gdb/testsuite/ChangeLog:

	* Makefile.in (check-parallel): Propagate return code from make
	do-check-parallel.
2016-01-19 10:45:57 -05:00
John Baldwin
a6e69c1f1d Fix detection of "r_fs" and "r_gs" on FreeBSD.
Include <sys/types.h> as a prerequisite for <machine/reg.h> when checking
for the r_fs and r_gs members in struct reg.  Note that the previous test
for <machine/reg.h> already includes <sys/types.h> as a prerequisite.

gdb/ChangeLog:

	* configure.ac: Include <sys/types.h when checking for "r_fs" in
	"struct reg".
	* configure: Regenerate.
2016-01-19 07:37:20 -08:00
Miranda Cupertino
34e967a5f3 Add PIC and TLS support to the ARC target.
bfd/ChangeLog:
	* arc-plt.def: New file.
	* arc-plt.h: Likewise.
	* elf32-arc.c (elf_arc_abs_plt0_entry, elf_arc_abs_pltn_entry,
		       elf_arcV2_abs_plt0_entry, elf_arcV2_abs_pltn_entry,
		       elf_arc_pic_plt0_entry, elf_arc_pic_pltn_entry,
		       elf_arcV2_pic_plt0_entry, elf_arcV2_pic_pltn_entry): Remove.
	(name_for_global_symbol): Added.
	(ADD_RELA): Helper to create dynamic relocs.
	(new_got_entry_to_list): Create a new got entry in linked list.
	(symbol_has_entry_of_type): Search for specific type of entry in
	list.
	(is_reloc_for_GOT): return FALSE for any TLS related relocs.
	(is_reloc_for_TLS, arc_elf_set_private_flags)
	(arc_elf_print_private_bfd_data, arc_elf_copy_private_bfd_data)
	(arc_elf_merge_private_bfd_data): New functions.
	(debug_arc_reloc): Cleaned debug info printing.
	(PDATA reloc): Changed not to perform address alignment.
	(reverse_me): Added. Fix for ARC_32 relocs.
	(arc_do_relocation): Return bfd_reloc_of when no relocation should
	occur.
	(arc_get_local_got_ents): Renamed from arc_get_local_got_offsets.
	Changed function to access an array of list of GOT entries instead
	of just an array of offsets.
	(elf_arc_relocate_section): Added support for PIC and TLS related relocations.
	(elf_arc_check_relocs): Likewise.
	(elf_arc_adjust_dynamic_symbol, elf_arc_finish_dynamic_symbol,
	(elf_arc_finish_dynamic_sections): Likewise
	(arc_create_dynamic_sections): Modified conditions to create
	dynamic sections.
	(ADD_SYMBOL_REF_SEC_AND_RELOC): New macro.
	(plt_do_relocs_for_symbol, relocate_plt_for_symbol)
	(relocate_plt_for_entry): Changed to support new way to define PLT
	related code.
	(add_symbol_to_plt): Likewise.
	(arc_elf_link_hash_table_create): New function.

include/ChangeLog:
	* elf/arc-reloc.def (ARC_32, ARC_GOTPC, ARC_TLS_GD_GOT)
	(ARC_TLS_IE_GOT, ARC_TLS_DTPOFF, ARC_TLS_DTPOFF_S9, ARC_TLS_LE_S9)
	(ARC_TLS_LE_32): Fixed formula.
	(ARC_TLS_GD_LD): Use new special function.
	* opcode/arc-func.h: Changed all the replacement
	functions to clear the patching bits before doing an or it with the value
	argument.
2016-01-19 15:25:58 +00:00