[Ada] Make the symbol cache per-program-space.

This patch moves the Ada symbol cache to per-program-space data.

gdb/ChangeLog:

        * ada-lang.c (struct cache_entry, HASH_SIZE): Move definition up.
        (struct ada_symbol_cache): New.
        (ada_free_symbol_cache): Forward declare.
        (struct ada_pspace_data): New.
        (ada_pspace_data_handle): New static global.
        (get_ada_pspace_data, ada_pspace_data_cleanup)
        (ada_init_symbol_cache, ada_free_symbol_cache): New functions.
        (cache_space, cache): Delete, now folded inside struct
        ada_pspace_data.
        (ada_get_symbol_cache): New function.
        (ada_clear_symbol_cache, find_entry, cache_symbol): Adjust
        implementation.
        (_initialize_ada_language): Remove initialization of cache_space.
        Move call to observer_attach_inferior_exit up, grouping it
        with the other observer registrations inside this function.
        Rename command to be more general.  Add call to
        register_program_space_data_with_cleanup.
Update debug_qf_expand_symtabs_matching to use typedefs.

Commit 206f2a5777679e6d1ad21ce435f6e7af92e2d41a added two new
typedefs, but did not update debug_qf_expand_symtabs_matching
to use them.  This patch fixes this.

Checked in as obvious.

2014-02-10  Gary Benson  <gbenson@redhat.com>

	* symfile-debug.c (debug_qf_expand_symtabs_matching):
	Use expand_symtabs_file_matcher_ftype and
	expand_symtabs_symbol_matcher_ftype.
Merge
Fix compile error

This commit fixes a compile error introduced by my previous commit.

Checked in as obvious.

2014-02-10  Gary Benson  <gbenson@redhat.com>

	* symfile-debug.c (debug_qf_expand_symtabs_matching):
	Rename name_matcher to symbol_matcher.
Merge
Add gdbarch_in_function_epilogue_p hook for sparc64.

watchpoint_update and watchpoint_cond avoid checking for
watchpoints when we are located at a function epilogue in the
current frame.  This is done in order to avoid using corrupted
local registers and unwinding a corrupted/destroyed stack.

The code determining whether we are in a function epilogue is
provided by the backends via the gdbarch_in_function_epilogue_p
hook.  This commit adds such a hook for sparc64 targets.

2014-02-10  Jose E. Marchesi  <jose.marchesi@oracle.com>

	* sparc-tdep.c (sparc_in_function_epilogue_p): New function.
	(X_RETTURN): New macro.
	* sparc-tdep.h: sparc_in_function_epilogue_p prototype.

	* sparc64-tdep.c (sparc64_init_abi): Hook
	sparc_in_function_epilogue_p.
Add PR reference.
Mark symbol in executables if it matches dynamic_list

bfd/

	PR gold/16530
	* elflink.c (bfd_elf_gc_mark_dynamic_ref_symbol): Mark symbol in
	executables if it matches dynamic_list.

ld/testsuite/

	PR gold/16530
	* ld-elf/dynamic-1.c: New file.
	* ld-elf/dynamic-1.rd: Likewise.
	* ld-elf/dynamic-1.syms: Likewise.

	* ld-elf/shared.exp (build_tests): Add dynamic-1.
gdb/elfread.c: Enable ifunc support on ARM.

There are two failures in the gnu-ifunc.exp test on ARM. These are
due to the failure to resolve the correct target function when
attempting to breakpoint a GNU ifunc resolved function:

(gdb) break gnu_ifunc
Breakpoint 4 at gnu-indirect-function resolver at 0x2aacb5a2

when gnu_ifunc has been resolved this should actually be:

(gdb) break gnu_ifunc
Breakpoint 4 at 0x868c

There are two reasons for this. The first is that ARM does not have a
separate .got.plt section so looking this up will always fail. The second
is that the Thumb bit needs to be stripped from the address to allow
it to be reliably compared when inserting into the ifunc cache.

Tested with no regressions on arm-linux-gnueabihf and
x86_64-unknown-linux-gnu.

gdb/ChangeLog:

2014-02-10  Will Newton  <will.newton@linaro.org>

	* elfread.c (elf_rel_plt_read): Look for a .got section if
	looking up .got.plt fails.
	(elf_gnu_ifunc_resolve_by_got): Call gdbarch_addr_bits_remove
	on address passed to elf_gnu_ifunc_record_cache.
	(elf_gnu_ifunc_resolve_addr): Likewise.
	(elf_gnu_ifunc_resolver_return_stop): Likewise.
Avoid killing all processes.

gdb/ChangeLog:

        * gdb.threads/step-after-sr-lock.exp: Avoid executing
        "kill -SIGUSR1 -1".
daily update
Add Doxygen support to GDB
Reformat symfile-debug.c::debug_qf_expand_symtabs_matching parameters.

gdb/ChangeLog:

	* symfile-debug.c (debug_qf_expand_symtabs_matching): Reformat
	function parameters.
Fix thinko in mi/mi-main.c::mi_cmd_data_write_memory_bytes comment.

gdb/ChangeLog:
2014-02-11  Simon Marchi  <simon.marchi@ericsson.com>  (tiny patch)

	Checked in by Joel Brobecker <brobecker@adacore.com>.
	* mi/mi-main.c (mi_cmd_data_write_memory_bytes): Fix comment.
Return target_xfer_status in to_xfer_partial

This patch does the conversion of to_xfer_partial from

    LONGEST (*to_xfer_partial) (struct target_ops *ops,
				enum target_object object, const char *annex,
				gdb_byte *readbuf, const gdb_byte *writebuf,
				ULONGEST offset, ULONGEST len);

to

    enum target_xfer_status (*to_xfer_partial) (struct target_ops *ops,
				enum target_object object, const char *annex,
				gdb_byte *readbuf, const gdb_byte *writebuf,
				ULONGEST offset, ULONGEST len, ULONGEST *xfered_len);

It changes to_xfer_partial return the transfer status and the transfered
length by *XFERED_LEN.  Generally, the return status has three stats,

 - TARGET_XFER_OK,
 - TARGET_XFER_EOF,
 - TARGET_XFER_E_XXXX,

See the comments to them in 'enum target_xfer_status'.  Note that
Pedro suggested not name TARGET_XFER_DONE, as it is confusing,
compared with "TARGET_XFER_OK".  We finally name it TARGET_XFER_EOF.

With this change, GDB core can handle unavailable data in a convenient
way.

The rationale behind this change was mentioned here
https://sourceware.org/ml/gdb-patches/2013-10/msg00761.html

Consider an object/value like this:

  0          100      150        200           512
  DDDDDDDDDDDxxxxxxxxxDDDDDD...DDIIIIIIIIIIII..III

where D is valid data, and xxx is unavailable data, and I is beyond
the end of the object (Invalid).  Currently, if we start the
xfer at 0, requesting, say 512 bytes, we'll first get back 100 bytes.
The xfer machinery then retries fetching [100,512), and gets back
TARGET_XFER_E_UNAVAILABLE.  That's sufficient when you're either
interested in either having the whole of the 512 bytes available,
or erroring out.  But, in this scenario, we're interested in
the data at [150,512).  The problem is that the last
TARGET_XFER_E_UNAVAILABLE gives us no indication where to
start the read next.  We'd need something like:

get me [0,512) >>>
     <<< here's [0,100), *xfered_len is 100, returns TARGET_XFER_OK

get me [100,512)  >>> (**1)
     <<< [100,150) is unavailable, *xfered_len is 50, return TARGET_XFER_E_UNAVAILABLE.

get me [150,512) >>>
     <<< here's [150,200), *xfered_len is 50, return TARGET_XFER_OK.

get me [200,512) >>>
     <<< no more data, return TARGET_XFER_EOF.

This naturally implies pushing down the decision of whether
to return TARGET_XFER_E_UNAVAILABLE or something else
down to the target.  (Which kinds of leads back to tfile
itself reading from RO memory from file (though we could
export a function in exec.c for that that tfile delegates to,
instead of re-adding the old code).

Beside this change, we also add a macro TARGET_XFER_STATUS_ERROR_P to
check whether a status is an error or not, to stop using "status < 0".
This patch also eliminates the comparison between status and 0.

No target implementations to to_xfer_partial adapts this new
interface.  The interface still behaves as before.

gdb:

2014-02-11  Yao Qi  <yao@codesourcery.com>

	* target.h (enum target_xfer_error): Rename to ...
	(enum target_xfer_status): ... it.  New.  All users updated.
	(enum target_xfer_status) <TARGET_XFER_OK>, <TARGET_XFER_EOF>:
	New.
	(TARGET_XFER_STATUS_ERROR_P): New macro.
	(target_xfer_error_to_string): Remove declaration.
	(target_xfer_status_to_string): Declare.
	(target_xfer_partial_ftype): Adjust it.
	(struct target_ops) <to_xfer_partial>: Return
	target_xfer_status.  Add argument xfered_len.  Update
	comments.
	* target.c (target_xfer_error_to_string): Rename to ...
	(target_xfer_status_to_string): ... it.  New.  All callers
	updated.
	(target_read_live_memory): Likewise.  Call target_xfer_partial
	instead of target_read.
	(memory_xfer_live_readonly_partial): Return
	target_xfer_status.  Add argument xfered_len.
	(raw_memory_xfer_partial): Likewise.
	(memory_xfer_partial_1): Likewise.
	(memory_xfer_partial): Likewise.
	(target_xfer_partial): Likewise.  Check *XFERED_LEN is set
	properly.  Update debug message.
	(default_xfer_partial, current_xfer_partial): Likewise.
	(target_write_partial): Likewise.
	(target_read_partial): Likewise.  All callers updated.
	(read_whatever_is_readable): Likewise.
	(target_write_with_progress): Likewise.
	(target_read_alloc_1): Likewise.

	* aix-thread.c (aix_thread_xfer_partial): Likewise.
	* auxv.c (procfs_xfer_auxv): Likewise.
	(ld_so_xfer_auxv, memory_xfer_auxv): Likewise.
	* bfd-target.c (target_bfd_xfer_partial): Likewise.
	* bsd-kvm.c (bsd_kvm_xfer_partial): Likewise.
	* bsd-uthread.c (bsd_uthread_xfer_partia): Likewise.
	* corefile.c (read_memory): Adjust.
	* corelow.c (core_xfer_partial): Likewise.
	* ctf.c (ctf_xfer_partial): Likewise.
	* darwin-nat.c (darwin_read_dyld_info): Likewise.  All callers
	updated.
	(darwin_xfer_partial): Likewise.
	* exec.c (section_table_xfer_memory_partial): Likewise.  All
	callers updated.
	(exec_xfer_partial): Likewise.
	* exec.h (section_table_xfer_memory_partial): Update
	declaration.
	* gnu-nat.c (gnu_xfer_memory): Likewise.  Assert 'res' is not
	negative.
	(gnu_xfer_partial): Likewise.
	* ia64-hpux-nat.c (ia64_hpux_xfer_memory_no_bs): Likewise.
	(ia64_hpux_xfer_memory, ia64_hpux_xfer_uregs): Likewise.
	(ia64_hpux_xfer_solib_got): Likewise.
	* inf-ptrace.c (inf_ptrace_xfer_partial): Likewise.  Change
	type of 'partial_len' to ULONGEST.
	* inf-ttrace.c (inf_ttrace_xfer_partial): Likewise.
	* linux-nat.c (linux_xfer_siginfo ): Likewise.
	(linux_nat_xfer_partial): Likewise.
	(linux_proc_xfer_partial, linux_xfer_partial): Likewise.
	(linux_proc_xfer_spu, linux_nat_xfer_osdata): Likewise.
	* monitor.c (monitor_xfer_memory): Likewise.
	(monitor_xfer_partial): Likewise.
	* procfs.c (procfs_xfer_partial): Likewise.
	* record-btrace.c (record_btrace_xfer_partial): Likewise.
	* record-full.c (record_full_xfer_partial): Likewise.
	(record_full_core_xfer_partial): Likewise.
	* remote-sim.c (gdbsim_xfer_memory): Likewise.
	(gdbsim_xfer_partial): Likewise.
	* remote.c (remote_write_bytes_aux): Likewise.  All callers
	updated.
	(remote_write_bytes, remote_read_bytes): Likewise.  All
	callers updated.
	(remote_flash_erase): Likewise.  All callers updated.
	(remote_write_qxfer): Likewise.  All callers updated.
	(remote_read_qxfer): Likewise.  All callers updated.
	(remote_xfer_partial): Likewise.
	* rs6000-nat.c (rs6000_xfer_partial): Likewise.
	(rs6000_xfer_shared_libraries): Likewise.
	* sol-thread.c (sol_thread_xfer_partial): Likewise.
	(sol_thread_xfer_partial): Likewise.
	* sparc-nat.c (sparc_xfer_wcookie): Likewise.
	(sparc_xfer_partial): Likewise.
	* spu-linux-nat.c (spu_proc_xfer_spu): Likewise.  All callers
	updated.
	(spu_xfer_partial): Likewise.
	* spu-multiarch.c (spu_xfer_partial): Likewise.
	* tracepoint.c (tfile_xfer_partial): Likewise.
	* windows-nat.c (windows_xfer_memory): Likewise.
	(windows_xfer_shared_libraries): Likewise.
	(windows_xfer_partial): Likewise.
	* valprint.c: Replace 'target_xfer_error' with
	'target_xfer_status' in comments.
Update comments to to_xfer_partial implementations.

Some comments to to_xfer_partial implementations are out of date.
This patch updates them using the "Implement the to_xfer_partial
target_ops method" pattern.

gdb:

2014-02-11  Yao Qi  <yao@codesourcery.com>

	* aix-thread.c (aix_thread_xfer_partial): Update comments.
	* auxv.c (procfs_xfer_auxv, memory_xfer_auxv): Likewise.
	* bsd-uthread.c (bsd_uthread_xfer_partial): Likewise.
	* gnu-nat.c (gnu_xfer_memory): Likewise.
	* inf-ptrace.c (inf_ptrace_xfer_partial):  Likewise.
	* rs6000-nat.c (rs6000_xfer_partial): Likewise.
	* sparc-nat.c (sparc_xfer_wcookie): Likewise.
	* spu-linux-nat.c (spu_proc_xfer_spu): Likewise.
Don't crash if pkg-config is not found and guile wasn't explicitly requested.

	* configure.ac: Don't crash if pkg-config is not found and guile
	wasn't explicitly requested.  Use AC_MSG_ERROR instead of AC_ERROR
	in guile checks.
	* configure: Regenerate.
Merge