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2017-01-10Use gdbpy_enter_varobj in py-varobj.cTom Tromey2-11/+10
This converts the remaining functions in py-varobj.c to use gdbpy_enter_varobj. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-varobj.c (py_varobj_iter_dtor, py_varobj_iter_next): Use gdbpy_enter_varobj.
2017-01-10Introduce gdbpy_enter_varobj and use itTom Tromey4-13/+33
This introduces gdbpy_enter_varobj, a subclass of gdbpy_enter; then changes one function in py-varobj.c to use it. gdbpy_enter_varobj takes a varobj as an argument, similar to varobj_ensure_python_env. 2017-01-10 Tom Tromey <tom@tromey.com> * varobj.c (gdbpy_enter_varobj): New constructor. * python/python-internal.h (gdbpy_enter_varobj): New class. * python/py-varobj.c (py_varobj_get_iterator): Use gdbpy_enter_varobj.
2017-01-10Use gdbpy_enter in py-xmethod.cTom Tromey2-91/+83
This changes the remaining functions in py-xmethod.c to use gdbpy_enter; using gdbpy_ref and unique_xmalloc_ptr as appropriate. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-xmethods.c (gdbpy_get_xmethod_result_type): Use gdbpy_enter, gdbpy_ref, unique_xmalloc_ptr. (gdbpy_invoke_xmethod): Use gdbpy_ref, gdbpy_enter. (gdbpy_get_xmethod_arg_types): Use gdbpy_ref, unique_xmalloc_ptr. (gdbpy_get_xmethod_arg_types): Use gdbpy_ref, gdbpy_enter.
2017-01-10Use gdbpy_ref in invoke_match_methodTom Tromey2-38/+17
Change invoke_match_method to use gdbpy_ref. I neglected to convert this function in my earlier series. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-xmethods.c (invoke_match_method): Use gdbpy_ref.
2017-01-10Use gdbpy_enter in gdbpy_get_matching_xmethod_workersTom Tromey2-95/+63
Change gdbpy_get_matching_xmethod_workers to use gdbpy_enter and gdbpy_ref. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-xmethods.c (gdbpy_get_matching_xmethod_workers): use gdbpy_enter, gdbpy_ref.
2017-01-10Use gdbpy_enter in python_interactive_commandTom Tromey2-1/+5
This changes python_interactive_command to use gdbpy_enter. Previously this function was leaving a dangling cleanup -- this is sort of ok in a command function, but IMO it's still better to clean up. 2017-01-10 Tom Tromey <tom@tromey.com> * python/python.c (python_interactive_command): Use gdbpy_enter.
2017-01-10Use gdbpy_enter in gdbpy_before_prompt_hookTom Tromey2-39/+38
Change gdbpy_before_prompt_hook to use gdbpy_enter and gdbpy_ref. This also rearranges the function a tiny bit to make it more clear. 2017-01-10 Tom Tromey <tom@tromey.com> * python/python.c (gdbpy_before_prompt_hook): Use gdbpy_enter, gdbpy_ref.
2017-01-10Use gdbpy_enter in py-prettyprint.cTom Tromey2-30/+20
Change py-prettyprint.c to use gdbpy_enter. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-prettyprint.c (gdbpy_apply_val_pretty_printer): Use gdbpy_enter, gdbpy_ref, unique_xmalloc_ptr.
2017-01-10Introduce htab_up and use gdbpy_enter in py-framefilter.cTom Tromey3-34/+40
This introduces a new "htab_up" typedef, which is a std::unique_ptr that can call htab_delete. Then it changes some code in py-framefilter.c to use both gdbpy_enter and the new htab_up. 2017-01-10 Tom Tromey <tom@tromey.com> * utils.h (htab_deleter): New struct. (htab_up): New typedef. * python/py-framefilter.c (gdbpy_apply_frame_filter): Use gdbpy_enter, gdbpy_ref, htab_up.
2017-01-10Use gdbpy_enter in py-unwind.cTom Tromey2-39/+38
Change py-unwind.c to use gdbpy_enter. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-unwind.c (pending_frame_invalidate): Remove. (pyuw_sniffer): Use gdbpy_enter and gdbpy_ref.
2017-01-10Use gdbpy_enter in py-xmethods.cTom Tromey2-8/+7
Change the simple parts of py-xmethods.c to use gdbpy_enter. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-xmethods.c (gdbpy_free_xmethod_worker_data) (gdbpy_clone_xmethod_worker_data): Use gdbpy_enter.
2017-01-10Use gdbpy_enter in py-type.cTom Tromey2-4/+5
Change py-type.c to use gdbpy_enter. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-type.c (save_objfile_types): Use gdbpy_enter.
2017-01-10Use gdbpy_enter in python.cTom Tromey2-30/+16
Change the simple parts of python.c to use gdbpy_enter. 2017-01-10 Tom Tromey <tom@tromey.com> * python/python.c (gdbpy_eval_from_control_command) (gdbpy_source_script, gdbpy_run_events) (gdbpy_source_objfile_script, gdbpy_execute_objfile_script) (gdbpy_free_type_printers, gdbpy_finish_initialization): Use gdbpy_enter.
2017-01-10Use gdbpy_enter in py-progspace.cTom Tromey2-3/+5
Change py-progspace.c to use gdbpy_enter. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-progspace.c (py_free_pspace): Use gdbpy_enter.
2017-01-10Use gdbpy_enter in py-objfile.cTom Tromey2-3/+5
Change py-objfile.c to use gdbpy_enter. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-objfile.c (py_free_objfile): Use gdbpy_enter.
2017-01-10Use gdbpy_enter in py-inferior.cTom Tromey2-59/+23
Change py-inferior.c to use gdbpy_enter. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-inferior.c (python_on_normal_stop, python_on_resume) (python_on_inferior_call_pre, python_on_inferior_call_post) (python_on_memory_change, python_on_register_change) (python_inferior_exit, python_new_objfile, add_thread_object) (delete_thread_object, py_free_inferior): Use gdbpy_enter.
2017-01-10Use gdbpy_enter in py-finishbreakpoint.cTom Tromey2-8/+7
Change py-finishbreakpoint.c to use gdbpy_enter. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-finishbreakpoint.c (bpfinishpy_handle_stop) (bpfinishpy_handle_exit): Use gdbpy_enter.
2017-01-10Use gdbpy_enter in py-cmd.cTom Tromey2-10/+9
Change py-cmd.c to use gdbpy_enter. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-cmd.c (cmdpy_destroyer) (cmdpy_completer_handle_brkchars, cmdpy_completer): Use gdbpy_enter.
2017-01-10Use gdbpy_enter in py-breakpoint.cTom Tromey2-10/+10
Change py-breakpoint.c to use gdbpy_enter. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-breakpoint.c (gdbpy_breakpoint_cond_says_stop): Use gdbpy_enter. (gdbpy_breakpoint_has_cond): Likewise.
2017-01-10Introduce gdbpy_enterTom Tromey3-37/+64
This introduces gdbpy_enter, a class that can be used to acquire and release the Python GIL, and also set other Python-related globals used by gdb. ensure_python_env is rewritten in terms of this new class. 2017-01-10 Tom Tromey <tom@tromey.com> * python/python.c (gdbpy_enter): New constructor. (~gdbpy_enter): New destructor. (restore_python_env, ensure_python_env): Rewrite. * python/python-internal.h (gdbpy_enter): New class.
2017-01-10Use gdbpy_ref in gdbpy_lookup_symbolTom Tromey2-10/+12
This changes gdbpy_lookup_symbol to use gdbpy_ref. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-symbol.c (gdbpy_lookup_symbol): Use gdbpy_ref.
2017-01-10Use gdbpy_ref in py-value.cTom Tromey2-29/+20
This changes a few functions in py-value.c to use gdbpy_ref. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-value.c (value_has_field, get_field_flag) (get_field_type, valpy_getitem, convert_value_from_python): Use gdbpy_ref.
2017-01-10Use gdbpy_ref in python.cTom Tromey2-18/+16
This changes a couple of functions in python.c to use gdbpy_ref. 2017-01-10 Tom Tromey <tom@tromey.com> * python/python.c (gdbpy_progspaces, gdbpy_objfiles): Use gdbpy_ref.
2017-01-10Use gdbpy_ref in py-prettyprint.cTom Tromey2-62/+41
This changes several functions in py-prettyprint.c to use gdbpy_ref. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-prettyprint.c (search_pp_list) (find_pretty_printer_from_objfiles) (find_pretty_printer_from_progspace) (find_pretty_printer_from_gdb, find_pretty_printer) (gdbpy_get_display_hint, gdbpy_get_varobj_pretty_printer): Use gdbpy_ref.
2017-01-10Use gdbpy_ref in call_doc_functionTom Tromey2-6/+9
This changes call_doc_function to use gdbpy_ref. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-param.c (call_doc_function): Use gdbpy_ref.
2017-01-10Use gdbpy_ref in py-linetable.cTom Tromey2-37/+19
This changes some code in py-linetable.c to use gdbpy_ref. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-linetable.c (build_line_table_tuple_from_pcs) (ltpy_get_all_source_lines): Use gdbpy_ref.
2017-01-10Use gdbpy_ref in py-framefilter.cTom Tromey2-57/+35
This changes some code in py-framefilter.c to use gdbpy_ref. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-framefilter.c (extract_sym, extract_value) (get_py_iter_from_func, bootstrap_python_frame_filters): Use gdbpy_ref.
2017-01-10Use gdbpy_ref in gdbpy_breakpointsTom Tromey2-13/+9
This changes gdbpy_breakpoints to use gdbpy_ref. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-breakpoint.c (gdbpy_breakpoints): Use gdbpy_ref.
2017-01-10Use gdbpy_ref in gdbpy_inferiorsTom Tromey2-13/+9
This changes gdbpy_inferiors to use gdbpy_ref. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-inferior.c (gdbpy_inferiors): Use gdbpy_ref.
2017-01-10Use gdbpy_ref in py-function.cTom Tromey2-16/+16
This changes some code in py-function.c to use gdbpy_ref. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-function.c (convert_values_to_python, fnpy_init): Use gdbpy_ref.
2017-01-10Use gdbpy_ref in gdbpy_string_to_argvTom Tromey2-8/+9
This chanes gdbpy_string_to_argv to use gdbpy_ref. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-cmd.c (gdbpy_string_to_argv): Use gdbpy_ref.
2017-01-10Use gdbpy_ref in py-type.cTom Tromey2-117/+83
This changes py-type.c to use gdbpy_ref. This results in simpler logic and the removal of "goto"s. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-type.c (convert_field, make_fielditem, typy_fields) (typy_range): Use gdbpy_ref.
2017-01-10Change event code to use gdbpy_refTom Tromey12-272/+167
This changes the event code in the Python layer to use gdbpy_ref, simplifying the logic in many places. It also changes evpy_emit_event not to steal a reference to its argument. This is simpler to do now that gdbpy_ref is in use; it's also a reasonable cleanup in its own right. While doing this I realized that evpy_emit_event should not be calling gdbpy_print_stack (all the outermost callers do this if needed), so I removed this as well. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-threadevent.c (create_thread_event_object): Use gdbpy_ref. * python/py-stopevent.c (create_stop_event_object): Simplify. (emit_stop_event): Use gdbpy_ref. * python/py-signalevent.c (create_signal_event_object): Use gdbpy_ref. * python/py-newobjfileevent.c (create_new_objfile_event_object) (emit_new_objfile_event, create_clear_objfiles_event_object) (emit_clear_objfiles_event): Use gdbpy_ref. * python/py-infevents.c (create_inferior_call_event_object) (create_register_changed_event_object) (create_memory_changed_event_object, emit_inferior_call_event) (emit_memory_changed_event, emit_register_changed_event): Use gdbpy_ref. * python/py-exitedevent.c (create_exited_event_object) (emit_exited_event): Use gdbpy_ref. * python/py-event.h (evpy_emit_event): Remove CPYCHECKER_STEALS_REFERENCE_TO_ARG annotation. * python/py-event.c (evpy_emit_event): Use gdbpy_ref. * python/py-continueevent.c (emit_continue_event): Use gdbpy_ref. * python/py-breakpoint.c (gdbpy_breakpoint_created) (gdbpy_breakpoint_deleted, gdbpy_breakpoint_modified): Use gdbpy_ref. * python/py-bpevent.c (create_breakpoint_event_object): Use gdbpy_ref.
2017-01-10Introduce py-ref.hTom Tromey2-0/+163
This patch introduces class gdbpy_ref, which is a sort of smart pointer that owns a single Python reference to a PyObject. This class acts a bit like unique_ptr, but also a bit like shared_ptr (in that copies do what you might expect); I considered going solely with unique_ptr but it seemed quite strange to have a unique_ptr that actually manages a shared resource. Subsequent patches use this new class to simplify logic in the Python layer. 2017-01-10 Tom Tromey <tom@tromey.com> * python/py-ref.h: New file.
2017-01-11Automatic date update in version.inGDB Administrator1-1/+1
2017-01-10i386/x32: Align .eh_frame section to 4 bytesH.J. Lu5-11/+18
.eh_frame section covering PLT sections should be aligned to 4 bytes for i386 and x32. bfd/ * elf32-i386.c (elf_i386_check_relocs): Align .eh_frame section to 4 bytes. * elf64-x86-64.c (elf_x86_64_create_dynamic_sections): Align .eh_frame section to 4 bytes for x32. (elf_x86_64_check_relocs): Likewise. ld/ * testsuite/ld-x86-64/pr20830b.d: Updated.
2017-01-10X32: Place .plt.got section after .plt sectionH.J. Lu5-1/+82
This patch places .plt.got section after .plt section for x32. * emulparams/elf32_x86_64.sh (TINY_READONLY_SECTION): New. * testsuite/ld-x86-64/pr20830.d: Renamed to ... * testsuite/ld-x86-64/pr20830a.d: This. Updated. * testsuite/ld-x86-64/pr20830b.d: New file. * testsuite/ld-x86-64/x86-64.exp: Rename pr20830 to pr20830a. Run pr20830b.
2017-01-10i386/x86-64: Add unwind info for .plt.got sectionH.J. Lu10-16/+418
When there are both PLT and GOT references to the same function symbol, linker combines GOTPLT and GOT slots into a single GOT slot and create an entry in .plt.got section for PLT access via the GOT slot. This patch adds unwind info for .plt.got section. bfd/ PR ld/20830 * elf32-i386.c (elf_i386_eh_frame_plt_got): New. (PLT_GOT_FDE_LENGTH): Likewise. (elf_i386_plt_layout): Add eh_frame_plt_got and eh_frame_plt_got_size. (elf_i386_plt): Updated. (elf_i386_link_hash_table): Add plt_got_eh_frame. (elf_i386_check_relocs): Create .eh_frame section for .plt.got. (elf_i386_size_dynamic_sections): Allocate and initialize .eh_frame section for .plt.got. (elf_i386_finish_dynamic_sections): Adjust .eh_frame section for .plt.got. (elf_i386_nacl_plt): Add FIXME for eh_frame_plt_got and eh_frame_plt_got_size. * elf64-x86-64.c (elf_x86_64_eh_frame_plt_got): New. (PLT_GOT_FDE_LENGTH): Likewise. (elf_x86_64_backend_data): Add eh_frame_plt_got and eh_frame_plt_got_size. (elf_x86_64_arch_bed): Updated. (elf_x86_64_bnd_arch_bed): Add FIXME for eh_frame_plt_got and eh_frame_plt_got_size. (elf_x86_64_nacl_arch_bed): Likewise. (elf_x86_64_link_hash_table): Add plt_got_eh_frame. (elf_x86_64_check_relocs): Create .eh_frame section for .plt.got. (elf_x86_64_size_dynamic_sections): Allocate and initialize .eh_frame section for .plt.got. (elf_x86_64_finish_dynamic_sections): Adjust .eh_frame section for .plt.got. ld/ PR ld/20830 * testsuite/ld-i386/i386.exp: Run pr20830. * testsuite/ld-x86-64/x86-64.exp: Likewise. * testsuite/ld-i386/pr20830.d: New file. * testsuite/ld-i386/pr20830.s: Likewise. * testsuite/ld-x86-64/pr20830.d: Likewise. * testsuite/ld-x86-64/pr20830.s: Likewise.
2017-01-11[GOLD] PowerPC64 TOC indirect to TOC relative code editingAlan Modra2-44/+537
Doesn't yet trim off the unused TOC entries. * powerpc.cc (class Powerpc_copy_relocs): New. (Powerpc_copy_relocs::emit): New function. (Powerpc_relobj::relatoc_, toc_, no_toc_opt_): New variables. (Powerpc_relobj::toc_shndx, set_no_toc_opt, no_toc_opt): New inlines. (Powerpc_relobj::do_relocate_sections): New function. (Powerpc_relobj::make_toc_relative): Likewise. (Powerpc_relobj::do_find_special_sections): Stash away .rela.toc and .toc too. (ok_lo_toc_insn): Move earlier, and handle more insns. (Target_powerpc::Scan::local): If optimizing toc accesses, set no_toc_opt for entries we can't edit. Check insn validity. Emit "toc optimization is not supported" warning, downgraded from error. (Target_powerpc::Scan::global): Likewise. (Target_powerpc::Relocate::relocate): Edit TOC indirect code to TOC relative. Don't emit "toc optimization is not supported" error here.
2017-01-10Don't use elf_i386_eh_frame_plt directlyH.J. Lu2-3/+10
Use eh_frame_plt_size and eh_frame_plt from elf_i386_plt_layout for .eh_frame covering the .plt section. * elf32-i386.c (elf_i386_size_dynamic_sections): Set plt_eh_frame->size to eh_frame_plt_size and use eh_frame_plt.
2017-01-10i386: Pass -Wl,-R,tmpdir/-Wl --as-needed to $CCH.J. Lu3-5/+11
Since linker tests were changed to use $CC, instead of $LD, we need to pass -Wl,-R,tmpdir and -Wl,--as-needed to $CC. * testsuite/ld-i386/i386.exp: Pass -Wl,-R,tmpdir to GCC driver. * testsuite/ld-i386/tls.exp: Likewise.
2017-01-10Change return type of ui_out redirect to voidSimon Marchi11-32/+34
All implementations of redirect/do_redirect in the ui_out subsystem always return 0 (success). We can therefore clean it up and make them return void. gdb/ChangeLog: * cli-out.c (cli_ui_out::do_redirect): Change return type to void. * cli-out.h (cli_ui_out::do_redirect): Likewise. * mi/mi-out.c (mi_ui_out::do_redirect): Likewise. * mi/mi-out.h (mi_ui_out::do_redirect): Likewise. * ui-out.c (ui_out::redirect): Likewise. * ui-out.h (ui_out::redirect, ui_out::do_redirect): Likewise. * cli/cli-logging.c (set_logging_redirect): Update call site of ui_out::redirect. (handle_redirections): Likewise. * scm-ports.c (ioscm_with_output_to_port_worker): Likewise. * top.c (execute_command_to_string): Likewise. * utils.c (do_ui_out_redirect_pop): Likewise.
2017-01-10Refactor Sized_relobj_file::do_relocate_sections.Cary Coutant5-9/+93
gold/ * aarch64.cc (AArch64_relobj::do_relocate_sections): Call Sized_relobj_file::relocate_section_range(). * arm.cc (Arm_relobj::do_relocate_sections): Likewise. * object.h (Sized_relobj_file::relocate_section_range): New method. * reloc.cc (Sized_relobj_file::do_relocate_sections): Move implementation... (Sized_relobj_file::relocate_section_range): ...to new method.
2017-01-10Update help of the "frame" commandSimon Marchi2-3/+5
The help message of the "frame" command states that nothing is printed if the command is executed from the command file or user-defined command. My testing leads me to think that this is not true (at least today). (gdb) bt #0 bar (n=17) at test.c:9 #1 0x00000000004006e0 in foo (v=17) at test.c:13 #2 0x00000000004006f0 in main () at test.c:21 (gdb) frame #0 bar (n=17) at test.c:9 9 baz(n); (gdb) define foo Type commands for definition of "foo". End with a line saying just "end". >frame 1 >end (gdb) foo #1 0x00000000004006e0 in foo (v=17) at test.c:13 13 bar(v); This patch simply removes that bit from the help message. I didn't find anything corresponding to this in the documentation that needs to be fixed. The behavior change corresponding to this documentation change was done in commit b00771232fab861fb31e42dfd5f6643ba1b43cc9. gdb/ChangeLog: * stack.c (_initialize_stack): Update "frame" command help message.
2017-01-10Fix sleb128-8 regressions.Tristan Gingold3-2/+7
gas/ * testsuite/gas/all/sleb128-8.d: Adjust test. * testsuite/gas/all/gas.exp (test_cond): Likewise.
2017-01-10Fix compile time warning about pointer comparison.Nick Clifton2-1/+7
PR 21034 * stabs.c (parse_stab_members): Fix thinko checking for g++ version 1 stabs information.
2017-01-10Updated Swedish translations for GAS and LDNick Clifton5-1529/+2157
2017-01-10[ARC] Add new linker emulation for npsGraham Markall8-2/+205
The arc700 nps variant uses some specific named sections to facilitate its CMEM based instructions, which operate on memory regions fixed at specific addresses. This commit adds the arclinux_nps emulation, which is based on the arclinux emulation. The new emulation uses the OTHER_SECTIONS variable in the emulation parameters script to provide symbols mapping to various locations in the CMEM space on nps. The accompanying test ensures that all symbols are provided at the correct address in the linker script. ld/ChangeLog: * Makefile.am: Add earclinux_nps.c target and add to ALL_EMULATION_SOURCES. * Makefile.in: Likewise, regenerated. * configure.tgt: Add arclinux_nps as an extra emulation for arc*-*-elf* and arc*-*-linux*. * emulparams/arc-nps.sh: New file. * emulparams/arclinux_nps.sh: New file. * testsuite/ld-arc/arclinux-nps.d, * testsuite/ld-arc/arclinux-nps.s: New test.
2017-01-10This patch ensure same output for sleb128 with large number.Tristan Gingold5-3/+29
gas/ * read.c (emit_leb128_expr): Extended unsigned big number for sleb128. * testsuite/gas/all/gas.exp (test_cond): Add sleb128-8 test. * testsuite/gas/all/sleb128.d: New test. * testsuite/gas/all/sleb128.s: New test source.
2017-01-10[GOLD] Fix tests for powerpc64Alan Modra4-10/+54
PowerPC64 defines .TOC. rather than _GLOBAL_OFFSET_TABLE_, and what's more, doesn't define it at all unless referenced. For ELFv1 ABI the symbol isn't normally referenced, so modify the test to accept .TOC. as a variant of _GLOBAL_OFFSET_TABLE_ and 0 or 1 occurrences. copy_test_relro as written doesn't need copy relocs on PowerPC64. PowerPC64 is always PIC. So, modify copy_test_relro to test that the existing vars are in fact read-only directly by deliberately causing a sigsegv, and add another couple of vars that do cause copy relocs even when PIC. * testsuite/ver_test_8.sh: Accept .TOC. in lieu of _GLOBAL_OFFSET_TABLE_. Allow zero count. * testsuite/copy_test_relro_1.cc (c, q): New vars. * testsuite/copy_test_relro.cc: Rewrite to test read-only status of variables directly. Reference new vars in read-only data.