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ChangeLog
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2017-09-20 Ian Lance Taylor <[email protected]>
Denis Khalikov <[email protected]>
PR sanitizer/77631
Support for external debug info.
* elf.c: Include <errno.h>, <sys/stat.h>, <unistd.h>.
(S_ISLNK): Define if not defined.
(xstrnlen): Define if strnlen is not available.
(b_elf_note): Define type.
(NT_GNU_BUILD_ID): Define macro.
(elf_crc32, elf_crc32_file): New static functions.
(elf_is_symlink, elf_readlink): New static functions.
(elf_open_debugfile_by_buildid): New static function.
(elf_try_debugfile): New static function.
(elf_find_debugfile_by_debuglink): New static function.
(elf_open_debugfile_by_debuglink): New static function.
(elf_add): Add filename and debuginfo parameters. Adjust all
callers. Look for external debug info notes, and try to fetch
debug info from external file.
(struct phdr_data): Add exe_filename field.
(phdr_callback): Pass filename to elf_add.
(backtrace_initialize): Add filename parameter.
* internal.h (backtrace_initialize): Add filename parameter.
* fileline.c (fileline_initialize): Pass filename to
backtrace_initialize.
* pecoff.c (fileline_initialize): Add unused filename parameter.
* unknown.c (fileline_initialize): Likewise.
* xcoff.c (fileline_initialize): Likewise.
* configure.ac: Check for objcopy --add-gnu-debuglink.
* Makefile.am (dtest): New test target.
* configure, Makefile.in: Rebuild.
2017-09-12 Steve Ellcey <[email protected]>
PR other/81096
* Makefile.am (ttest_CFLAGS): Add $(AM_CFLAGS)
* Makefile.in: Regenerate.
2017-09-12 Steve Ellcey <[email protected]>
PR other/81096
* libbacktrace/Makefile.in
(HAVE_PTHREAD_TRUE@@NATIVE_TRUE@ttest_CFLAGS): Add $(AM_CFLAGS)
2017-08-02 David Edelsohn <[email protected]>
PR bootstrap/81638
* xcoff.c (xcoff_process_linenos): Initialize incl to NULL.
2017-07-28 Tony Reix <[email protected]>
* xcoff.c: Don't leak a file descriptor if an archive is malformed.
2017-07-28 Rainer Orth <[email protected]>
* fileline.c (fileline_initialize): Print pid_t as long.
2017-07-26 Tony Reix <[email protected]>
* configure.ac: Check for XCOFF32/XCOFF64. Check for loadquery.
* filetype.awk: Separate AIX XCOFF32 and XCOFF64.
* xcoff.c: Add support for AIX XCOFF32 and XCOFF64 formats.
* configure, config.h.in: Regenerate.
2017-07-21 Tony Reix <[email protected]>
* filetype.awk: Add AIX XCOFF type detection.
* configure.ac: Recognize xcoff format.
* Makefile.am (FORMAT_FILES): Add xcoff.c.
* fileline.c: Include <unistd.h>.
(fileline_initialize): Add case for AIX procfs.
* xcoff.c: New file.
* configure, Makefile.in: Rebuild.
2017-06-21 Richard Biener <[email protected]>
* configure.ac: Add AC_SYS_LARGEFILE.
* config.h.in: Regenerate.
* configure: Likewise.
2017-06-11 Ian Lance Taylor <[email protected]>
* elf.c (backtrace_initialize): Always set *fileline_fn.
* ttest.c: New file.
* btest.c: Move support functions into testlib.c. Change calls to
check to pass file name.
* testlib.c: New file, copied from (part of) btest.c.
* testlib.h: New file, declarations for testlib.c.
* edtest.c: Use testlib.h and testlib.c.
* configure.ac: Test for -pthread, set HAVE_PTHREAD conditional.
* Makefile.am (btest_SOURCES): Add testlib.c.
(edtest_SOURCES): Likewise.
(CHECK_PROGRAMS): Add ttest if HAVE_PTHREAD.
(ttest_SOURCES, ttest_CFLAGS, ttest_LDADD): Define.
* configure, Makefile.in: Rebuild.
2017-05-19 Than McIntosh <[email protected]>
* dwarf.c (free_line_header): Don't free dirs if dirs_count == 0.
(read_line_header): Don't allocate dirs if dirs_count == 0.
* edtest.c: New file.
* edtest2.c: New file.
* Makefile.am (edtest_SOURCES, edtest_LDADD): Define.
(check_PROGRAMS): Add edtest.
(edtest2_build.c, gen_edtest2_build): New targets.
* Makefile.in: Rebuild.
2017-03-08 Sam Thursfield <[email protected]>
* btest.c (test5): Replace #ifdef guard with 'unused' attribute
to fix compile warning when BACKTRACE_SUPPORTED isn't defined.
2017-01-01 Jakub Jelinek <[email protected]>
Update copyright years.
2016-11-15 Matthias Klose <[email protected]>
* configure: Regenerate.
2016-09-11 Carlos Liam <[email protected]>
* all: Remove meaningless trailing whitespace.
2016-05-18 Uros Bizjak <[email protected]>
PR target/71161
* elf.c (phdr_callback) [__i386__]: Add
__attribute__((__force_align_arg_pointer__)).
2016-03-02 Maxim Ostapenko <[email protected]>
* elf.c (backtrace_initialize): Properly initialize elf_fileline_fn to
avoid possible crash.
(elf_add): Don't set *fileline_fn to elf_nodebug value in case of
missing debug info anymore.
2016-02-06 John David Anglin <[email protected]>
* mmap.c (MAP_FAILED): Define if not defined.
2016-01-04 Jakub Jelinek <[email protected]>
Update copyright years.
2015-12-18 Andris Pavenis <[email protected]>
* configure.ac: Specify that DJGPP do not have mmap
even when sys/mman.h exists.
* configure: Regenerate
2015-12-09 John David Anglin <[email protected]>
PR libgfortran/68115
* configure.ac: Set libbacktrace_cv_sys_sync to no on hppa*-*-hpux*.
* configure: Regenerate.
* elf.c (backtrace_initialize): Cast __sync_bool_compare_and_swap call
to void.
2015-09-17 Ian Lance Taylor <[email protected]>
* posix.c (backtrace_open): Cast second argument of open() to int.
2015-09-11 Ian Lance Taylor <[email protected]>
* Makefile.am (backtrace.lo): Depend on internal.h.
(sort.lo, stest.lo): Add explicit dependencies.
* Makefile.in: Rebuild.
2015-09-09 Hans-Peter Nilsson <[email protected]>
* backtrace.c: #include <sys/types.h>.
2015-09-08 Ian Lance Taylor <[email protected]>
PR other/67457
* backtrace.c: #include "internal.h".
(struct backtrace_data): Add can_alloc field.
(unwind): If can_alloc is false, don't try to get file/line
information.
(backtrace_full): Set can_alloc field in bdata.
* alloc.c (backtrace_alloc): Don't call error_callback if it is
NULL.
* mmap.c (backtrace_alloc): Likewise.
* internal.h: Update comments for backtrace_alloc and
backtrace_free.
2015-09-08 Ian Lance Taylor <[email protected]>
PR other/67457
* mmap.c (backtrace_alloc): Correct test for mmap failure.
2015-08-31 Ulrich Weigand <[email protected]>
* configure.ac: For spu-*-* targets, set have_fcntl to no.
* configure: Regenerate.
2015-08-27 Ulrich Weigand <[email protected]>
* configure.ac: Remove [disable-shared] argument to LT_INIT.
Remove setting PIC_FLAG when building as target library.
* configure: Regenerate.
2015-08-26 Hans-Peter Nilsson <[email protected]>
* configure.ac: Only compile with -fPIC if the target
supports it.
* configure: Regenerate.
2015-08-24 Ulrich Weigand <[email protected]>
* configure.ac: Set have_mmap to no on spu-*-* targets.
* configure: Regenerate.
2015-08-13 Ian Lance Taylor <[email protected]>
* dwarf.c (read_function_entry): Add vec_inlined parameter.
Change all callers.
2015-06-11 Martin Sebor <[email protected]>
PR sanitizer/65479
* dwarf.c (struct line): Add new field idx.
(line_compare): Use it.
(add_line): Set it.
(read_line_info): Reset it.
2015-05-29 Tristan Gingold <[email protected]>
* pecoff.c: New file.
* Makefile.am (FORMAT_FILES): Add pecoff.c and dependencies.
* Makefile.in: Regenerate.
* filetype.awk: Detect pecoff.
* configure.ac: Define BACKTRACE_SUPPORTS_DATA on elf platforms.
Add pecoff.
* btest.c (test5): Test enabled only if BACKTRACE_SUPPORTS_DATA is
true.
* backtrace-supported.h.in (BACKTRACE_SUPPORTS_DATA): Define.
* configure: Regenerate.
* pecoff.c: New file.
2015-05-13 Michael Haubenwallner <[email protected]>
* Makefile.in: Regenerated with automake-1.11.6.
* aclocal.m4: Likewise.
* configure: Likewise.
2015-01-24 Matthias Klose <[email protected]>
* configure.ac: Move AM_ENABLE_MULTILIB before AC_PROG_CC.
* configure: Regenerate.
2015-01-05 Jakub Jelinek <[email protected]>
Update copyright years.
2014-11-21 H.J. Lu <[email protected]>
PR bootstrap/63784
* configure: Regenerated.
2014-11-11 David Malcolm <[email protected]>
* ChangeLog.jit: New.
2014-11-11 Francois-Xavier Coudert <[email protected]>
PR target/63610
* configure: Regenerate.
2014-10-23 Ian Lance Taylor <[email protected]>
* internal.h (backtrace_atomic_load_pointer) [no atomic or sync]:
Fix to return void *.
2014-05-08 Ian Lance Taylor <[email protected]>
* mmap.c (backtrace_free): If freeing a large aligned block of
memory, call munmap rather than holding onto it.
(backtrace_vector_grow): When growing a vector, double the number
of pages requested. When releasing the old version of a grown
vector, pass the correct size to backtrace_free.
2014-03-07 Ian Lance Taylor <[email protected]>
* sort.c (backtrace_qsort): Use middle element as pivot.
2014-03-06 Ian Lance Taylor <[email protected]>
* sort.c: New file.
* stest.c: New file.
* internal.h (backtrace_qsort): Declare.
* dwarf.c (read_abbrevs): Call backtrace_qsort instead of qsort.
(read_line_info, read_function_entry): Likewise.
(read_function_info, build_dwarf_data): Likewise.
* elf.c (elf_initialize_syminfo): Likewise.
* Makefile.am (libbacktrace_la_SOURCES): Add sort.c.
(stest_SOURCES, stest_LDADD): Define.
(check_PROGRAMS): Add stest.
2014-02-07 Misty De Meo <[email protected]>
PR target/58710
* configure.ac: Use AC_LINK_IFELSE in check for
_Unwind_GetIPInfo.
* configure: Regenerate.
2014-01-02 Richard Sandiford <[email protected]>
Update copyright years
2013-12-06 Jakub Jelinek <[email protected]>
* elf.c (ET_DYN): Undefine and define again.
(elf_add): Add exe argument, if true and ehdr.e_type is ET_DYN,
return early -1 without closing the descriptor.
(struct phdr_data): Add exe_descriptor.
(phdr_callback): If pd->exe_descriptor is not -1, for very first
call if dlpi_name is NULL just call elf_add with the exe_descriptor,
otherwise backtrace_close the exe_descriptor if not -1. Adjust
call to elf_add.
(backtrace_initialize): Adjust call to elf_add. If it returns
-1, set pd.exe_descriptor to descriptor, otherwise set it to -1.
2013-12-05 Ian Lance Taylor <[email protected]>
* alloc.c (backtrace_vector_finish): Add error_callback and data
parameters. Call backtrace_vector_release. Return address base.
* mmap.c (backtrace_vector_finish): Add error_callback and data
parameters. Return address base.
* dwarf.c (read_function_info): Get new address base from
backtrace_vector_finish.
* internal.h (backtrace_vector_finish): Update declaration.
2013-11-27 Ian Lance Taylor <[email protected]>
* dwarf.c (find_address_ranges): New static function, broken out
of build_address_map.
(build_address_map): Call it.
* btest.c (check): Check for missing filename or function, rather
than crashing.
(f3): Check that enough frames were returned.
2013-11-19 Jakub Jelinek <[email protected]>
* backtrace.h (backtrace_syminfo_callback): Add symsize argument.
* elf.c (elf_syminfo): Pass 0 or sym->size to the callback as
last argument.
* btest.c (struct symdata): Add size field.
(callback_three): Add symsize argument. Copy it to the data->size
field.
(f23): Set symdata.size to 0.
(test5): Likewise. If sizeof (int) > 1, lookup address of
((uintptr_t) &global) + 1. Verify symdata.val and symdata.size
values.
* atomic.c: Include sys/types.h.
2013-11-18 Ian Lance Taylor <[email protected]>
* configure.ac: Check for support of __atomic extensions.
* internal.h: Declare or #define atomic functions for use in
backtrace code.
* atomic.c: New file.
* dwarf.c (dwarf_lookup_pc): Use atomic functions.
(dwarf_fileline, backtrace_dwarf_add): Likewise.
* elf.c (elf_add_syminfo_data, elf_syminfo): Likewise.
(backtrace_initialize): Likewise.
* fileline.c (fileline_initialize): Likewise.
* Makefile.am (libbacktrace_la_SOURCES): Add atomic.c.
* configure, config.h.in, Makefile.in: Rebuild.
2013-11-18 Jakub Jelinek <[email protected]>
* elf.c (SHN_UNDEF): Define.
(elf_initialize_syminfo): Add base_address argument. Ignore symbols
with st_shndx == SHN_UNDEF. Add base_address to address fields.
(elf_add): Adjust caller.
* elf.c (phdr_callback): Process info->dlpi_addr == 0 normally.
2013-11-16 Ian Lance Taylor <[email protected]>
* backtrace.h (backtrace_create_state): Correct comment about
threading.
2013-11-15 Ian Lance Taylor <[email protected]>
* backtrace.h (backtrace_syminfo): Update comment and parameter
name to take any address, not just a PC value.
* elf.c (STT_OBJECT): Define.
(elf_nosyms): Rename parameter pc to addr.
(elf_symbol_search): Rename local variable pc to addr.
(elf_initialize_syminfo): Add STT_OBJECT symbols to elf_symbols.
(elf_syminfo): Rename parameter pc to addr.
* btest.c (global): New global variable.
(test5): New test.
(main): Call test5.
2013-10-17 Ian Lance Taylor <[email protected]>
* elf.c (elf_add): Don't get the wrong offsets if a debug section
is missing.
2013-10-15 David Malcolm <[email protected]>
* configure.ac: Add --enable-host-shared, setting up
pre-existing PIC_FLAG variable within Makefile.am et al.
* configure: Regenerate.
2013-09-20 Alan Modra <[email protected]>
* configure: Regenerate.
2013-07-23 Alexander Monakov <[email protected]>
* elf.c (elf_syminfo): Loop over the elf_syminfo_data chain.
2013-07-23 Alexander Monakov <[email protected]>
* elf.c (backtrace_initialize): Pass elf_fileline_fn to
dl_iterate_phdr callbacks.
2013-03-25 Ian Lance Taylor <[email protected]>
* alloc.c: #include <sys/types.h>.
* mmap.c: Likewise.
2013-01-31 Ian Lance Taylor <[email protected]>
* dwarf.c (read_function_info): Permit fvec parameter to be NULL.
(dwarf_lookup_pc): Don't use ddata->fvec if threaded.
2013-01-25 Jakub Jelinek <[email protected]>
PR other/56076
* dwarf.c (read_line_header): Don't crash if DW_AT_comp_dir
attribute was not seen.
2013-01-16 Ian Lance Taylor <[email protected]>
* dwarf.c (struct unit): Add filename and abs_filename fields.
(build_address_map): Set new fields when reading unit.
(dwarf_lookup_pc): If we don't find an entry in the line table,
just return the main file name.
2013-01-14 Richard Sandiford <[email protected]>
Update copyright years.
2013-01-01 Ian Lance Taylor <[email protected]>
PR bootstrap/54834
* Makefile.am (AM_CPPFLAGS): Remove -I ../gcc/include and -I
$(MULTIBUILDTOP)/../../gcc/include.
* Makefile.in: Rebuild.
2013-01-01 Ian Lance Taylor <[email protected]>
PR other/55536
* mmap.c (backtrace_alloc): Don't call sync functions if not
threaded.
(backtrace_free): Likewise.
2012-12-12 John David Anglin <[email protected]>
* mmapio.c: Define MAP_FAILED if not defined.
2012-12-11 Jakub Jelinek <[email protected]>
PR bootstrap/54926
* Makefile.am (AM_CFLAGS): Remove -frandom-seed=$@.
* configure.ac: If --with-target-subdir, add -frandom-seed=$@
to EXTRA_FLAGS unconditionally, otherwise check whether the compiler
accepts it.
* Makefile.in: Regenerated.
* configure: Regenerated.
2012-12-07 Jakub Jelinek <[email protected]>
PR bootstrap/54926
* Makefile.am (AM_CFLAGS): Add -frandom-seed=$@.
* Makefile.in: Regenerated.
2012-11-20 Ian Lance Taylor <[email protected]>
* dwarf.c (read_attribute): Always clear val.
2012-11-13 Ian Lance Taylor <[email protected]>
PR other/55312
* configure.ac: Only add -Werror if building a target library.
* configure: Rebuild.
2012-11-12 Ian Lance Taylor <[email protected]>
Rainer Orth <[email protected]>
Gerald Pfeifer <[email protected]>
* configure.ac: Check for getexecname.
* fileline.c: #include <errno.h>. Define getexecname if not
available.
(fileline_initialize): Try to find the executable in a few
different ways.
* print.c (error_callback): Only print the filename if it came
from the backtrace state.
* configure, config.h.in: Rebuild.
2012-10-29 Ian Lance Taylor <[email protected]>
* mmap.c (backtrace_vector_release): Correct last patch: add
aligned, not size.
2012-10-29 Ian Lance Taylor <[email protected]>
* mmap.c (backtrace_vector_release): Make sure freed block is
aligned on 8-byte boundary.
2012-10-26 Ian Lance Taylor <[email protected]>
PR other/55087
* posix.c (backtrace_open): Add does_not_exist parameter.
* elf.c (phdr_callback): Do not warn if shared library could not
be opened.
* fileline.c (fileline_initialize): Update calls to
backtrace_open.
* internal.h (backtrace_open): Update declaration.
2012-10-26 Jack Howarth <[email protected]>
PR target/55061
* configure.ac: Check for _Unwind_GetIPInfo function declaration.
* configure: Regenerate.
2012-10-24 Ian Lance Taylor <[email protected]>
PR target/55061
* configure.ac: Check whether -funwind-tables option works.
* configure: Rebuild.
2012-10-11 Ian Lance Taylor <[email protected]>
* configure.ac: Do not use dl_iterate_phdr on Solaris 10.
* configure: Rebuild.
2012-10-10 Ian Lance Taylor <[email protected]>
* elf.c: Rename all Elf typedefs to start with b_elf, and be all
lower case.
2012-10-10 Hans-Peter Nilsson <[email protected]>
* elf.c (elf_add_syminfo_data): Add casts to avoid warning.
2012-10-09 Ian Lance Taylor <[email protected]>
* dwarf.c (dwarf_fileline): Add cast to avoid warning.
(backtrace_dwarf_add): Likewise.
2012-10-09 Ian Lance Taylor <[email protected]>
Add support for tracing through shared libraries.
* configure.ac: Check for link.h and dl_iterate_phdr.
* elf.c: #include <link.h> if system has dl_iterate_phdr. #undef
ELF macros before #defining them.
(dl_phdr_info, dl_iterate_phdr): Define if system does not have
dl_iterate_phdr.
(struct elf_syminfo_data): Add next field.
(elf_initialize_syminfo): Initialize next field.
(elf_add_syminfo_data): New static function.
(elf_add): New static function, broken out of
backtrace_initialize. Call backtrace_dwarf_add instead of
backtrace_dwarf_initialize.
(struct phdr_data): Define.
(phdr_callback): New static function.
(backtrace_initialize): Call elf_add.
* dwarf.c (struct dwarf_data): Add next and base_address fields.
(add_unit_addr): Add base_address parameter. Change all callers.
(add_unit_ranges, build_address_map): Likewise.
(add_line): Add ddata parameter. Change all callers.
(read_line_program, add_function_range): Likewise.
(dwarf_lookup_pc): New static function, broken out of
dwarf_fileline.
(dwarf_fileline): Call dwarf_lookup_pc.
(build_dwarf_data): New static function.
(backtrace_dwarf_add): New function.
(backtrace_dwarf_initialize): Remove.
* internal.h (backtrace_dwarf_initialize): Don't declare.
(backtrace_dwarf_add): Declare.
* configure, config.h.in: Rebuild.
2012-10-04 Gerald Pfeifer <[email protected]>
* btest.c (f23): Avoid uninitialized variable warning.
2012-10-04 Ian Lance Taylor <[email protected]>
* dwarf.c: If the system header files do not declare strnlen,
provide our own version.
2012-10-03 Ian Lance Taylor <[email protected]>
* dwarf.c (read_uleb128): Fix overflow test.
(read_sleb128): Likewise.
(build_address_map): Don't change unit_buf.start.
2012-10-02 Uros Bizjak <[email protected]>
PR other/54761
* configure.ac (EXTRA_FLAGS): New.
* Makefile.am (AM_FLAGS): Add $(EXTRA_FLAGS).
* configure, Makefile.in: Regenerate.
2012-09-29 Ian Lance Taylor <[email protected]>
PR other/54749
* fileline.c (fileline_initialize): Pass errnum as -1 when
reporting that we could not read executable information after a
previous failure.
2012-09-27 Ian Lance Taylor <[email protected]>
PR bootstrap/54732
* configure.ac: Add no-dependencies to AM_INIT_AUTOMAKE.
* Makefile.am: Add dependencies for all objects.
* configure, aclocal.m4, Makefile.in: Rebuild.
2012-09-27 Ian Lance Taylor <[email protected]>
PR other/54726
* elf.c (backtrace_initialize): Set *fileln_fn, not
state->fileln_fn.
2012-09-19 Ian Lance Taylor <[email protected]>
* configure.ac: Only use GCC_CHECK_UNWIND_GETIPINFO when compiled
as a target library.
* configure: Rebuild.
2012-09-19 Rainer Orth <[email protected]>
Ian Lance Taylor <[email protected]>
* configure.ac (GCC_HEADER_STDINT): Invoke.
* backtrace.h: If we can't find <stdint.h>, use "gstdint.h".
* btest.c: Don't include <stdint.h>.
* dwarf.c: Likewise.
* configure, aclocal.m4, Makefile.in, config.h.in: Rebuild.
2012-09-18 Ian Lance Taylor <[email protected]>
PR bootstrap/54623
* Makefile.am (AM_CPPFLAGS): Define.
(AM_CFLAGS): Remove -I options.
* Makefile.in: Rebuild.
2012-09-18 Ian Lance Taylor <[email protected]>
* posix.c (O_BINARY): Define if not defined.
(backtrace_open): Pass O_BINARY to open. Only call fcntl if
HAVE_FCNTL is defined.
* configure.ac: Test for the fcntl function.
* configure, config.h.in: Rebuild.
2012-09-18 Ian Lance Taylor <[email protected]>
* btest.c (test1, test2, test3, test4): Add the unused attribute.
2012-09-18 Ian Lance Taylor <[email protected]>
* dwarf.c: Correct test of HAVE_DECL_STRNLEN.
2012-09-18 Ian Lance Taylor <[email protected]>
* configure.ac: Add AC_USE_SYSTEM_EXTENSIONS.
* mmapio.c: Don't define _GNU_SOURCE.
* configure, config.h.in: Rebuild.
2012-09-18 Ian Lance Taylor <[email protected]>
* configure.ac: Check whether strnlen is declared.
* dwarf.c: Declare strnlen if not declared.
* configure, config.h.in: Rebuild.
2012-09-18 Rainer Orth <[email protected]>
* fileline.c: Include <stdlib.h>.
* mmap.c: Likewise.
2012-09-17 Ian Lance Taylor <[email protected]>
PR bootstrap/54611
* nounwind.c (backtrace_full): Rename from backtrace. Add state
parameter.
2012-09-17 Gerald Pfeifer <[email protected]>
PR bootstrap/54611
* nounwind.c (backtrace_simple): Add state parameter.
2012-09-17 Ian Lance Taylor <[email protected]>
PR bootstrap/54609
* unknown.c (unknown_fileline): Add state parameter, remove
fileline_data parameter, name error_callback parameter.
(backtrace_initialize): Add state parameter.
2012-09-17 Ian Lance Taylor <[email protected]>
* Initial implementation.
Copyright (C) 2012-2017 Free Software Foundation, Inc.
Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.