zstdtest has some inline data where some testcases lack the
uncompressed length field.  Thus it computes that but still
ends up allocating memory for the uncompressed buffer based on
that (zero) length.  Oops.  Causes memory corruption if the
allocator returns non-NULL.

libbacktrace/
	* zstdtest.c (test_samples): Properly compute the allocation
	size for the uncompressed data.

(cherry picked from commit a9b60439)

	* elf.c (elf_zstd_read_fse): Call elf_fetch_bits after reading
	bits, not before.  Add unlikely for error case.
	(elf_zstd_offset_table): Regenerate.
	(elf_zstd_read_huff): Clear 13 entries in weight_mark, not 12.
	(elf_zstd_read_literals): For a single stream adjust by
	total_streams_size, not compressed_size.

	Change variables holding PC values from uint64_t to uintptr_t.
	Patch by Björn Schäpers.
	* dwarf.c (struct function_addrs): Change low and high fields to
	uintptr_t.
	(struct unit_addrs): Likewise.
	(resolve_addr_index): Change address parameter to uintptr_t*.
	(add_unit_addr): Change lowpc and highpc parameters to uintptr_t.
	(add_function_range): Likewise.
	(struct pcrange): Change lowpc and highpc fields to uintptr_t.
	(add_low_high_range): Change add_range lowpc and highpc parameters
	to uintptr_t.
	(add_ranges_from_ranges): Likewise.
	(add_ranges_from_rnglists): Likewise.
	(add_low_high_range): Chnage lowpc and highpc variables to
	uintpr_t.
	(add_ranges_from_rnglists): Change some local variables to
	uintptr_t.
	(add_ranges_from_ranges): Change base parameter to uintptr_t.
	(add_ranges_from_rnglists): Likewise.
	(read_function_entry): Likewise.
	(resolve_addr_index): Add explicit casts to uintptr_t.
	(update_pcrange): Likewise.
	(add_ranges_from_ranges): Likewise.
	(add_ranges_from_rnglists): Likewise.
	(read_function_entry): Likewise.

libbacktrace/ChangeLog:

	* Makefile.in: Regenerate.

libgomp/ChangeLog:

	* Makefile.in: Regenerate.
	* configure: Regenerate.

libphobos/ChangeLog:

	* Makefile.in: Regenerate.
	* libdruntime/Makefile.in: Regenerate.

libstdc++-v3/ChangeLog:

	* src/libbacktrace/Makefile.in: Regenerate.

	PR libbacktrace/108297
	* configure.ac: Test whether linker supports --build-id.
	* Makefile.am: Only run --build-id tests if supported.
	* configure, Makefile.in: Regenerate.

2022 -> 2023

	* elf.c (elf_fetch_backward_init): New static function.
	(ZSTD_TABLE_SIZE): Use huffman scratch space size rather than
	literal size.
	(ZSTD_TABLE_WORK_LIT_SIZE): Don't define.
	(elf_zstd_read_huff): Use elf_fetch_backward_init.
	(elf_zstd_read_literals): New static function.
	(ZSTD_LIT_RAW, ZSTD_LIT_RLE, ZSTD_LIT_HUFF): Don't define.
	(struct elf_zstd_literals): Don't define.
	(elf_zstd_literal_output): Remove static function.
	(elf_zstd_decompress): Use elf_fetch_backward_init and
	elf_zstd_read_literals.  Rewrite literal copying.<

	* elf.c (ZSTD_TABLE_*): Use elf_zstd_fse_baseline_entry.
	(ZSTD_ENCODE_BASELINE_BITS): Define.
	(ZSTD_DECODE_BASELINE, ZSTD_DECODE_BASEBITS): Define.
	(elf_zstd_literal_length_base): New static const array.
	(elf_zstd_match_length_base): Likewise.
	(struct elf_zstd_fse_baseline_entry): Define.
	(elf_zstd_make_literal_baseline_fse): New static function.
	(elf_zstd_make_offset_baseline_fse): Likewise.
	(elf_zstd_make_match_baseline_fse): Likewise.
	(print_table, main): Use elf_zstd_fse_baseline_entry.
	(elf_zstd_lit_table, elf_zstd_match_table): Likewise.
	(elf_zstd_offset_table): Likewise.
	(struct elf_zstd_seq_decode): Likewise.  Remove use_rle and rle
	fields.
	(elf_zstd_unpack_seq_decode): Use elf_zstd_fse_baseline_entry,
	taking a conversion function.  Convert RLE to FSE.
	(elf_zstd_literal_length_baseline): Remove.
	(elf_zstd_literal_length_bits): Remove.
	(elf_zstd_match_length_baseline): Remove.
	(elf_zstd_match_length_bits): Remove.
	(elf_zstd_decompress): Use elf_zstd_fse_baseline_entry.  Rewrite
	and simplify main loop.

	Support decompressing --compress-debug-sections=zstd.
	* configure.ac: Check for zstd library and
	--compress-debug-sections=zstd linker option.
	* Makefile.am (zstdtest_*): New targets.
	(zstdtest_alloc_*, ctestzstd_*): New targets.
	(BUILDTESTS): Add zstdtest, zstdtest_alloc, ctestzstd as
	appropriate.
	* elf.c (ELFCOMPRESS_ZSTD): Define.
	(elf_fetch_bits): Rename from elf_zlib_fetch.  Update uses.
	(elf_fetch_bits_backward): New static function.
	(ZLIB_HUFFMAN_*): Rename from HUFFMAN_*.  Update uses.
	(ZLIB_TABLE_*): Rename from ZDEBUG_TABLE_*.  Update uses.
	(ZSTD_TABLE_*): Define.
	(struct elf_zstd_fse_entry): Define.
	(elf_zstd_read_fse): New static function.
	(elf_zstd_build_fse): Likewise.
	(lit): Define if BACKTRACE_GENERATE_ZSTD_FSE_TABLES.
	(match, offset, next, print_table, main): Likewise.
	(elf_zstd_lit_table): New static const array.
	(elf_zstd_match_table, elf_zstd_offset_table): Likewise.
	(elf_zstd_read_huff): New static function.
	(struct elf_zstd_seq_decode): Define.
	(elf_zstd_unpack_seq_decode): New static function.
	(ZSTD_LIT_*): Define.
	(struct elf_zstd_literals): Define.
	(elf_zstd_literal_output): New static function.
	(ZSTD_LITERAL_LENGTH_BASELINE_OFFSET): Define.
	(elf_zstd_literal_length_baseline): New static const array.
	(elf_zstd_literal_length_bits): Likewise.
	(ZSTD_MATCH_LENGTH_BASELINE_OFFSET): Define.
	(elf_zstd_match_length_baseline): New static const array.
	(elf_zstd_match_length_bits): Likewise.
	(elf_zstd_decompress): New static function.
	(ZDEBUG_TABLE_SIZE): New definition.
	(elf_uncompress_chdr): Support ELF_COMPRESS_ZSTD.
	(backtrace_uncompress_zstd): New function.
	(elf_add): Use ZLIB_TABLE_SIZE for zlib-gnu sections.
	* internal.h (backtrace_uncompress_zstd): Declare.
	* zstdtest.c: New file.
	* configure, config.h.in, Makefile.in: Regenerate.

Needed after a recent change.

gcc/ChangeLog:

	* configure: Regenerate.

libatomic/ChangeLog:

	* configure: Regenerate.

libbacktrace/ChangeLog:

	* configure: Regenerate.

libcc1/ChangeLog:

	* configure: Regenerate.

libffi/ChangeLog:

	* configure: Regenerate.

libgfortran/ChangeLog:

	* configure: Regenerate.

libgomp/ChangeLog:

	* configure: Regenerate.

libitm/ChangeLog:

	* configure: Regenerate.

libobjc/ChangeLog:

	* configure: Regenerate.

liboffloadmic/ChangeLog:

	* configure: Regenerate.
	* plugin/configure: Regenerate.

libphobos/ChangeLog:

	* configure: Regenerate.

libquadmath/ChangeLog:

	* configure: Regenerate.

libsanitizer/ChangeLog:

	* configure: Regenerate.

libssp/ChangeLog:

	* configure: Regenerate.

libstdc++-v3/ChangeLog:

	* configure: Regenerate.

libvtv/ChangeLog:

	* configure: Regenerate.

lto-plugin/ChangeLog:

	* configure: Regenerate.

zlib/ChangeLog:

	* configure: Regenerate.

This change adds the configury bits to activate the build of
shared libs on VxWorks ports configured with --enable-shared,
for libraries variants where this is generally supported (rtp,
code model !large - currently not compatible with -fPIC).

Set lt_cv_deplibs_check_method in libtool.m4, so the build of
libraries know how to establish dependencies.  This is useful in
configurations such as aarch64 where proper support of LSE relies
on accurate dependency information between libstdc++ and libgcc_s
to begin with.

Regenerate configure scripts to reflect libtool.m4 change.

2022-10-09  Olivier Hainque  <hainque@adacore.com>

	* libtool.m4 (*vxworks*): When enable_shared, set dynamic_linker
	and friends for rtp !large. Assume the linker has the required
	abilities and set lt_cv_deplibs_check_method.

gcc/
	* config.gcc (*vxworks*): Add t-slibgcc fragment
	if enable_shared.

libgcc/
	* config.host (*vxworks*): When enable_shared, add
	libgcc and crtstuff "shared" fragments for rtp except
	large code model.
	(aarch64*-wrs-vxworks7*): Remove t-slibgcc-libgcc from
	the list of fragments.

2022-10-09  Olivier Hainque  <hainque@adacore.com>

gcc/
	* configure: Regenerate.

libatomic/
	* configure: Regenerate.

libbacktrace/
	* configure: Regenerate.

libcc1/
	* configure: Regenerate.

libffi/
	* configure: Regenerate.

libgfortran/
	* configure: Regenerate.

libgomp/
	* configure: Regenerate.

libitm/
	* configure: Regenerate.

libobjc/
	* configure: Regenerate.

liboffloadmic/
	* configure: Regenerate.

liboffloadmic/
	* plugin/configure: Regenerate.

libphobos/
	* configure: Regenerate.

libquadmath/
	* configure: Regenerate.

libsanitizer/
	* configure: Regenerate.

libssp/
	* configure: Regenerate.

libstdc++-v3/
	* configure: Regenerate.

libvtv/
	* configure: Regenerate.

lto-plugin/
	* configure: Regenerate.

zlib/
	* configure: Regenerate.

QNX uses sys/link.h rather than link.h for dl_iterate_phdr

Fixes https://github.com/ianlancetaylor/libbacktrace/issues/86

	* configure.ac: Check for sys/link.h.  Use either link.h or
	sys/link.h when checking for dl_iterate_phdr.
	* elf.c: Include sys/link.h if available.
	* configure, config.h.in: Regenerate.

	* macho.c (backtrace_initialize) [HAVE_MACH_O_DYLD_H]: Don't exit
	loop if we can't find debug info for one shared library.

	For https://github.com/ianlancetaylor/libbacktrace/issues/81
	* Makefile.am (MAKETESTS): New variable split out of TESTS.
	(CLEANFILES): Replace TESTS with BUILDTESTS and MAKETESTS.
	* Makefile.in: Regenerate.

Patch by Xi Ruoyao.

	* configure.ac: Use grep instead of fgrep.
	* configure, Makefile.in: Regenerate.

	PR libbacktrace/105721
	* README: Update.

Patch from Rui Ueyama, who says:

libbacktrace occasionally fails to decompress compressed debug info
even though the sections contain valid zlib streams. The cause of the
issue is an off-by-one error.

If a zlib data block is a plain data (uncompressed data), the next two
bytes contain the size of the block. These two bytes value is byte-
aligned, so if we read-ahead more than 8 bits, we need to unread it.

So, the correct condition to determine whether or not we need to
unread a byte is bits >= 8 and not bits > 8. Due to this error,
if the last read bits happened to end at a byte boundary, the next
byte would be skipped. That caused the decompression failure.

This bug was originally reported against the mold linker.
rui314/mold#402

	* elf.c (elf_zlib_inflate): Don't skip initial aligned byte in
	uncompressed block.

	* dwarf.c (find_address_ranges): Handle skeleton units.
	(read_function_entry): Likewise.

When I added the fields in 2019-12-13 I forgot to initialize them.

	* dwarf.c (build_address_map): Initialize DWARF 5 fields of unit.