gcc/libbacktrace/ChangeLog

2022-04-05  Ian Lance Taylor  <iant@golang.org>

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

2022-02-17  Ian Lance Taylor  <iant@golang.org>

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

2022-02-16  Ian Lance Taylor  <iant@golang.org>

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

2022-02-03  David Seifert  <soap@gentoo.org>
	    Jakub Jelinek  <jakub@redhat.com>

	* configure.ac: Support --disable-werror.
	* configure: Regenerate.

2021-12-28  Francois-Xavier Coudert  <fxcoudert@gmail.com>

	PR libbacktrace/103822
	* Makefile.am: Fix newline.
	* Makefile.in: Regenerate.

2021-11-12  Martin Liska  <mliska@suse.cz>

	PR libbacktrace/103167
	* elf.c (elf_uncompress_lzma_block): Cast to unsigned int.
	(elf_uncompress_lzma): Likewise.
	* xztest.c (test_samples): memcpy only if v > 0.

2021-10-22  Martin Liska  <mliska@suse.cz>

	PR testsuite/102742
	* btest.c (MIN_DESCRIPTOR): New.
	(MAX_DESCRIPTOR): Likewise.
	(check_available_files): Likewise.
	(check_open_files): Check only file descriptors that
	were not available at the entry.
	(main): Call check_available_files.

2021-08-13  Sergei Trofimovich  <siarheit@google.com>

	* install-debuginfo-for-buildid.sh.in: Force non-localized readelf
	output with LANG=C.

2021-06-28  Clément Chigot  <clement.chigot@atos.net>

	* xcoff.c (SSUBTYP_DWRNGES): New define.
	(xcoff_add): Use correct XCOFF DWARF section subtype
	for DEBUG_RANGES. Remove lineoff workaround.
	Adjust base_address.
	(xcoff_initialize_syminfo): Adapt to new base_address.
	(xcoff_lookup_pc): Likewise.
	(xcoff_initialize_fileline): Likewise.

2021-05-03  H.J. Lu  <hjl.tools@gmail.com>

	PR bootstrap/99703
	* configure: Regenerated.

2021-03-03  Ian Lance Taylor  <iant@golang.org>

	* dwarf.c (read_line_program): Don't special case file 0.
	(read_function_entry): Likewise.

2021-03-02  Ian Lance Taylor  <iant@golang.org>

	PR libbacktrace/98818
	* dwarf.c (dwarf_buf_error): Add errnum parameter.  Change all
	callers.
	* backtrace.h: Update backtrace_error_callback comment.

2021-02-12  Ian Lance Taylor  <iant@golang.org>

	* configure.ac: Check for objcopy --add-gnu-debuglink by using
	objcopy --help.
	* configure: Regenerate

2021-01-18  Ian Lance Taylor  <iant@golang.org>

	* Makefile.am (%_dwz): If dwz fails, use uncompressed debug info.
	* Makefile.in: Regenerate.
	* configure: Regenerate.

2021-01-18  Ian Lance Taylor  <iant@golang.org>

	PR debug/98716
	* dwarf.c (read_v2_paths): Allocate zero entry for dirs and
	filenames.
	(read_line_program): Remove parameter u, change caller.  Don't
	subtract one from dirs and filenames index.
	(read_function_entry): Don't subtract one from filenames index.

2021-01-05  Samuel Thibault  <samuel.thibault@ens-lyon.org>

	* configure: Re-generate.

2020-12-05  Iain Sandoe  <iain@sandoe.co.uk>

	PR target/97865
	* configure: Regenerate.

2020-12-02  Ian Lance Taylor  <iant@golang.org>

	* dwarf.c (resolve_string): Use > rather than >= to check whether
	string index extends past buffer.
	(resolve_addr_index): Similarly for address index.

2020-11-29  John David Anglin  <danglin@gcc.gnu.org>

	* configure: Regenerate.

2020-10-20  Ian Lance Taylor  <iant@golang.org>

	* internal.h (ATTRIBUTE_FALLTHROUGH): Define.
	* elf.c (elf_zlib_inflate): Use ATTRIBUTE_FALLTHROUGH.

2020-09-28  Ian Lance Taylor  <iant@golang.org>

	PR libbacktrace/97082
	* Makefile.am (check_DATA): Add mtest.dSYM if USE_DSYMUTIL.
	* Makefile.in: Regenerate.

2020-09-28  Ian Lance Taylor  <iant@golang.org>

	PR libbacktrace/97227
	* configure.ac (USE_DSYMUTIL): Define instead of HAVE_DSYMUTIL.
	* Makefile.am: Change all uses of HAVE_DSYMUTIL to USE_DSYMUTIL.
	* configure: Regenerate.
	* Makefile.in: Regenerate.

2020-09-23  Ian Lance Taylor  <iant@golang.org>

	* dwarf.c (report_inlined_functions): Handle PC == -1 and PC ==
	p->low.
	(dwarf_lookup_pc): Likewise.

2020-09-17  Ian Lance Taylor  <iant@golang.org>

	PR libbacktrace/97080
	* fileline.c (backtrace_syminfo_to_full_callback): New function.
	(backtrace_syminfo_to_full_error_callback): New function.
	* elf.c (elf_nodebug): Call syminfo_fn if possible.
	* internal.h (struct backtrace_call_full): Define.
	(backtrace_syminfo_to_full_callback): Declare.
	(backtrace_syminfo_to_full_error_callback): Declare.
	* mtest.c (f3): Only check all[i] if data.index permits.

2020-09-16  Iain Sandoe  <iain@sandoe.co.uk>

	* macho.c (MACH_O_CPU_TYPE_PPC): New.
	(MACH_O_CPU_TYPE_PPC64): New.
	Add compile-tests for powerpc to the Mach-O variants.

2020-09-14  Ian Lance Taylor  <iant@golang.org>

	PR libbacktrace/93608
	Add support for MiniDebugInfo.
	* elf.c (struct elf_view): Define.  Replace most uses of
	backtrace_view with elf_view.
	(elf_get_view): New static functions.  Replace most calls of
	backtrace_get_view with elf_get_view.
	(elf_release_view): New static functions.  Replace most calls of
	backtrace_release_view with elf_release_view.
	(elf_uncompress_failed): Rename from elf_zlib_failed.  Change all
	callers.
	(LZMA_STATES, LZMA_POS_STATES, LZMA_DIST_STATES): Define.
	(LZMA_DIST_SLOTS, LZMA_DIST_MODEL_START): Define.
	(LZMA_DIST_MODEL_END, LZMA_FULL_DISTANCES): Define.
	(LZMA_ALIGN_SIZE, LZMA_LEN_LOW_SYMBOLS): Define.
	(LZMA_LEN_MID_SYMBOLS, LZMA_LEN_HIGH_SYMBOLS): Define.
	(LZMA_LITERAL_CODERS_MAX, LZMA_LITERAL_CODER_SIZE): Define.
	(LZMA_PROB_IS_MATCH_LEN, LZMA_PROB_IS_REP_LEN): Define.
	(LZMA_PROB_IS_REP0_LEN, LZMA_PROB_IS_REP1_LEN): Define.
	(LZMA_PROB_IS_REP2_LEN, LZMA_PROB_IS_REP0_LONG_LEN): Define.
	(LZMA_PROB_DIST_SLOT_LEN, LZMA_PROB_DIST_SPECIAL_LEN): Define.
	(LZMA_PROB_DIST_ALIGN_LEN): Define.
	(LZMA_PROB_MATCH_LEN_CHOICE_LEN): Define.
	(LZMA_PROB_MATCH_LEN_CHOICE2_LEN): Define.
	(LZMA_PROB_MATCH_LEN_LOW_LEN): Define.
	(LZMA_PROB_MATCH_LEN_MID_LEN): Define.
	(LZMA_PROB_MATCH_LEN_HIGH_LEN): Define.
	(LZMA_PROB_REP_LEN_CHOICE_LEN): Define.
	(LZMA_PROB_REP_LEN_CHOICE2_LEN): Define.
	(LZMA_PROB_REP_LEN_LOW_LEN): Define.
	(LZMA_PROB_REP_LEN_MID_LEN): Define.
	(LZMA_PROB_REP_LEN_HIGH_LEN): Define.
	(LZMA_PROB_LITERAL_LEN): Define.
	(LZMA_PROB_IS_MATCH_OFFSET, LZMA_PROB_IS_REP_OFFSET): Define.
	(LZMA_PROB_IS_REP0_OFFSET, LZMA_PROB_IS_REP1_OFFSET): Define.
	(LZMA_PROB_IS_REP2_OFFSET): Define.
	(LZMA_PROB_IS_REP0_LONG_OFFSET): Define.
	(LZMA_PROB_DIST_SLOT_OFFSET): Define.
	(LZMA_PROB_DIST_SPECIAL_OFFSET): Define.
	(LZMA_PROB_DIST_ALIGN_OFFSET): Define.
	(LZMA_PROB_MATCH_LEN_CHOICE_OFFSET): Define.
	(LZMA_PROB_MATCH_LEN_CHOICE2_OFFSET): Define.
	(LZMA_PROB_MATCH_LEN_LOW_OFFSET): Define.
	(LZMA_PROB_MATCH_LEN_MID_OFFSET): Define.
	(LZMA_PROB_MATCH_LEN_HIGH_OFFSET): Define.
	(LZMA_PROB_REP_LEN_CHOICE_OFFSET): Define.
	(LZMA_PROB_REP_LEN_CHOICE2_OFFSET): Define.
	(LZMA_PROB_REP_LEN_LOW_OFFSET): Define.
	(LZMA_PROB_REP_LEN_MID_OFFSET): Define.
	(LZMA_PROB_REP_LEN_HIGH_OFFSET): Define.
	(LZMA_PROB_LITERAL_OFFSET): Define.
	(LZMA_PROB_TOTAL_COUNT): Define.
	(LZMA_IS_MATCH, LZMA_IS_REP, LZMA_IS_REP0): Define.
	(LZMA_IS_REP1, LZMA_IS_REP2, LZMA_IS_REP0_LONG): Define.
	(LZMA_DIST_SLOT, LZMA_DIST_SPECIAL, LZMA_DIST_ALIGN): Define.
	(LZMA_MATCH_LEN_CHOICE, LZMA_MATCH_LEN_CHOICE2): Define.
	(LZMA_MATCH_LEN_LOW, LZMA_MATCH_LEN_MID): Define.
	(LZMA_MATCH_LEN_HIGH, LZMA_REP_LEN_CHOICE): Define.
	(LZMA_REP_LEN_CHOICE2, LZMA_REP_LEN_LOW): Define.
	(LZMA_REP_LEN_MID, LZMA_REP_LEN_HIGH, LZMA_LITERAL): Define.
	(elf_lzma_varint): New static function.
	(elf_lzma_range_normalize): New static function.
	(elf_lzma_bit, elf_lzma_integer): New static functions.
	(elf_lzma_reverse_integer): New static function.
	(elf_lzma_len, elf_uncompress_lzma_block): New static functions.
	(elf_uncompress_lzma): New static function.
	(backtrace_uncompress_lzma): New function.
	(elf_add): Add memory and memory_size parameters.  Change all
	callers.  Look for .gnu_debugdata section, and, if found,
	decompress it and use it for symbols and debug info.  Permit the
	descriptor parameter to be -1.
	* internal.h (backtrace_uncompress_lzma): Declare.
	* mtest.c: New file.
	* xztest.c: New file.
	* configure.ac: Check for nm, xz, and comm programs.  Check for
	liblzma library.
	(HAVE_MINIDEBUG): Define.
	* Makefile.am (mtest_SOURCES): Define.
	(mtest_CFLAGS, mtest_LDADD): Define.
	(TESTS): Add mtest_minidebug if HAVE_MINIDEBUG.
	(%_minidebug): New pattern rule, if HAVE_MINIDEBUG.
	(xztest_SOURCES, xztest_CFLAGS, xztest_LDADD): Define.
	(xztest_alloc_SOURCES, xztest_alloc_CFLAGS): Define
	(xztest_alloc_LDADD): Define.
	(BUILDTESTS): Add mtest, xztest, xztest_alloc.
	(CLEANFILES): Add files created by minidebug pattern.
	(btest.lo): Correct INCDIR reference.
	(mtest.lo, xztest.lo, ztest.lo): New targets.
	* configure: Regenerate.
	* config.h.in: Regenerate.
	* Makefile.in: Regenerate.

2020-09-09  Ian Lance Taylor  <iant@golang.org>

	* pecoff.c (coff_initialize_syminfo): Add is_64 parameter.
	(coff_add): Determine and pass is_64.

2020-09-09  Ian Lance Taylor  <iant@golang.org>

	PR libbacktrace/96973
	* fileline.c (macho_get_executable_path): New static function.
	(fileline_initialize): Call macho_get_executable_path.

2020-09-09  Ian Lance Taylor  <iant@golang.org>

	* dwarf.c (function_addrs_search): Compare against the next entry
	low address, not the high address.
	(unit_addrs_search): Likewise.
	(build_address_map): Add a trailing unit_addrs.
	(read_function_entry): Add a trailing function_addrs.
	(read_function_info): Likewise.
	(report_inlined_functions): Search backward for function_addrs
	match.
	(dwarf_lookup_pc): Search backward for unit_addrs and
	function_addrs matches.

2020-09-08  Ian Lance Taylor  <iant@golang.org>

	* simple.c (simple_unwind): Correct comment spelling.

2020-09-08  Ian Lance Taylor  <iant@golang.org>

	* macho.c (macho_add_dsym): Make space for '/' in dsym.  Use
	correct length when freeing diralc.

2020-09-08  Ian Lance Taylor  <iant@golang.org>

	PR libbacktrace/96973
	* macho.c (macho_add_fat): Correctly swap 32-bit file offset.

2020-09-08  Ian Lance Taylor  <iant@golang.org>

	PR libbacktrace/96971
	* filetype.awk: Only match magic number at start of line.

2020-08-24  Ian Lance Taylor  <iant@golang.org>

	* macho.c (MACH_O_MH_MAGIC_FAT_64): Define.
	(MACH_O_MH_CIGAM_FAT_64): Define.
	(struct macho_fat_arch_64): Define.
	(macho_add_fat): Add and use is_64 parameter.
	(macho_add): Recognize 64-bit fat files.

2020-07-30  H.J. Lu  <hjl.tools@gmail.com>

	PR bootstrap/96202
	* configure: Regenerated.

2020-07-08  Ian Lance Taylor  <iant@golang.org>

	* configure.ac: Test linker support for DWARF5
	* configure: Regenerate

2020-05-29  H.J. Lu  <hjl.tools@gmail.com>

	PR bootstrap/95413
	* configure: Regenerated.

2020-05-15  H.J. Lu  <hongjiu.lu@intel.com>

	PR bootstrap/95147
	* configure: Regenerated.

2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>

	* configure: Regenerated.

2020-05-13  Ian Lance Taylor  <iant@golang.org>

	* ztest.c (test_large): Mark state ATTRIBUTE_UNUSED.

2020-05-13  Ian Lance Taylor  <iant@golang.org>

	PR go/95061
	* posix.c (backtrace_open): Treat EACCESS like ENOENT.

2020-05-12  H.J. Lu  <hongjiu.lu@intel.com>

	* Makefile.am (AM_CFLAGS): Add $(CET_HOST_FLAGS).
	* configure.ac: Add GCC_CET_HOST_FLAGS(CET_HOST_FLAGS) and
	AC_SUBST(CET_HOST_FLAGS).  Clear CET_HOST_FLAGS if jit isn't
	enabled.
	* Makefile.in: Regenerated.
	* configure: Likewise.

2020-05-11  Ian Lance Taylor  <iant@golang.org>

	PR libbacktrace/95012
	* configure.ac: Check for getpagesize declaration.
	* mmap.c: Declare getpagesize if necessary.
	* mmapio.c: Likewise.
	* configure: Regenerate.
	* config.h.in: Regenerate.
	* Makefile.in: Regenerate.

2020-05-09  Roland McGrath  <mcgrathr@google.com>

	* elf.c (elf_add): Bail early if there are no section headers at all.

2020-05-09  Ian Lance Taylor  <iant@golang.org>

	* elf.c (elf_add): Don't free strtab if an error occurs after
	recording symbol information.

2020-05-09  Ian Lance Taylor  <iant@golang.org>

	PR libbacktrace/88745
	* macho.c: New file.
	* filetype.awk: Recognize Mach-O files.
	* Makefile.am (FORMAT_FILES): Add macho.c.
	(check_DATA): New variable.  Set to .dSYM if HAVE_DSYMUTIL.
	(%.dSYM): New pattern target.
	(test_macho_SOURCES, test_macho_CFLAGS): New targets.
	(test_macho_LDADD): New target.
	(BUILDTESTS): Add test_macho.
	(macho.lo): Add dependencies.
	* configure.ac: Recognize macho file type.  Check for
	mach-o/dyld.h.  Don't try to run objcopy if we don't find it.
	Look for dsymutil and define a HAVE_DSYMUTIL conditional.
	* Makefile.in: Regenerate.
	* configure: Regenerate.
	* config.h.in: Regenerate.

2020-05-09  Ian Lance Taylor  <iant@golang.org>

	* read.c (backtrace_get_view): Support short read.

2020-05-09  Ian Lance Taylor  <iant@golang.org>

	* elf.c (elf_add): If debug sections are very large or far apart,
	read them individually rather than as a single view.

2020-05-08  Ian Lance Taylor  <iant@golang.org>

	* fileline.c (sysctl_exec_name): New static function.
	(sysctl_exec_name1): New macro or static function.
	(sysctl_exec_name2): Likewise.
	(fileline_initialize): Try sysctl_exec_name[12].
	* configure.ac: Check for sysctl args to fetch executable name.
	* configure: Regenerate.
	* config.h.in: Regenerate.

2020-02-15  Ian Lance Taylor  <iant@golang.org>

	* ztest.c (test_large): Update file to current libgo test file.

2020-02-03  Ian Lance Taylor  <iant@golang.org>

	* Makefile.am (libbacktrace_TEST_CFLAGS): Define.
	(test_elf32_CFLAGS): Use $(libbacktrace_test_CFLAGS).
	(test_elf_64_CFLAGS, test_xcoff_32_CFLAGS): Likewise.
	(test_xcoff_64_CFLAGS, test_pecoff_CFLAGS): Likewise.
	(test_unknown_CFLAGS, unittest_CFLAGS): Likewise.
	(unittest_alloc_CFLAGS, allocfail_CFLAGS): Likewise.
	(b2test_CFLAGS, b3test_CFLAGS, btest_CFLAGS): Likewise.
	(btest_lto_CFLAGS, btest_alloc_CFLAGS, stest_CFLAGS): Likewise.
	(stest_alloc_CFLAGS): Likewise.
	* Makefile.in: Regenerate.
	* ztest.c (error_callback_compress): Mark vdata unused.
	(test_large): Add casts to avoid warnings.

2020-01-01  Jakub Jelinek  <jakub@redhat.com>

	Update copyright years.

2019-12-13  Ian Lance Taylor  <iant@golang.org>

	Add DWARF 5 support.
	* dwarf.c (struct attr): Add val field.
	(enum attr_val_encoding): Add ATTR_VAL_ADDDRESS_INDEX,
	ATTR_VAL_STRING_INDEX, ATTR_VAL_RNGLISTS_INDEX.
	(struct line_header): Add addrsize field.
	(struct line_header_format): Define.
	(struct unit): Add str_offsets_base, addr_base, and rnglists_base
	fields.
	(read_uint24): New static function.
	(read_attribute): Add implicit_val parameter.  Replace dwarf_str
	and dwarf_str_size parameters with dwarf_sections parameter.  Add
	support for new DWARF 5 forms.  Change all callers.
	(resolve_string): New static function.
	(resolve_addr_index): Likewise.
	(read_abbrevs): Support DW_FORM_implicit_const.
	(struct pcrange): Add lowpc_is_addr_index, highpc_is_addr_Index,
	and ranges_is_index fields.
	(update_pcrange): Support DWARF 5 encodings.
	(add_high_low_range): New static function, split out of
	add_ranges.
	(add_ranges_from_ranges): Likewise.
	(add_ranges_from_rnglists): New static function.
	(add_ranges): Just call new helper functions.
	(find_address_ranges): Use resolve_string for strings, after
	reading all attributes.  Handle new DWARF 5 attributes.
	(build_address_map): Support DWARF 5 compilation units.
	(read_v2_paths): New static function, split out of
	read_line_header.
	(read_lnct): New static	function.
	(read_line_header_format_entries): Likewise.
	(read_line_header): Add ddata parameter.  Support DWARF 5 line
	headers.  Call new helper functions.  Change all callers.
	(read_line_program): Use addrsize from line program header.  Don't
	special case directory index 0 for DWARF 5.
	(read_referenced_name): Use resolve_string.
	(read_function_entry): Handle DWARF 5 encodings.  Use
	resolve_string.
	* internal.h (enum dwarf_section): Add DEBUG_ADDR,
	DEBUG_STR_OFFSETS, DEBUG_LINE_STR, DEBUG_RNGLISTS.
	* elf.c (dwarf_section_names): Add new section names.
	* pecoff.c (dwarf_section_names): Likewise.
	* xcoff.c (xcoff_add): Clear dwarf_sections before setting
	fields.
	* configure.ac: Define HAVE_DWARF5 automake conditional.
	* Makefile.am (dwarf5_SOURCES): New variable if HAVE_DWARF5.
	(dwarf5_CFLAGS, dwarf5_LDADD): Likewise.
	(dwarf5_alloc_SOURCES, dwarf5_alloc_CFLAGS): Likewise.
	(dwarf5_alloc_LDADD): Likewise.
	(BUILDTESTS): Add dwarf5 tests if HAVE_DWARF5.
	(CLEANFILES, clean-local): Define.

2019-12-08  Ian Lance Taylor  <iant@golang.org>

	* dwarf.c (struct pcrange): Define.
	(update_pcrange, add_ranges): New static functions.
	(add_unit_addr): Change signature to work with add_ranges.  Don't
	add base_address here.
	(add_unit_ranges): Remove.
	(find_address_ranges): Replace str/ranges parameters with
	dwarf_sections.  Use update_pcrange and add_ranges.  Change all
	callers.
	(add_function_range): Change signature to work with add_ranges.
	Don't add base_address here.
	(add_function_ranges): Remove.
	(read_function_entry): Use update_pcrange and add_ranges.

2019-12-04  Ian Lance Taylor  <iant@golang.org>

	* edtest.c (test1): Add noclone attribute.

2019-12-04  Ian Lance Taylor  <iant@golang.org>

	* internal.h (enum dwarf_section): Define.
	(struct dwarf_sections): Define.
	(backtrace_dwarf_add): Update declaration to replace specific
	section parameters with dwarf_sections parameter.
	* dwarf.c (struct dwarf_data): Replace specific section fields
	with dwarf_sections field.
	(read_attribute): Use dwarf_sections with altlink.
	(build_address_map): Replace specific section parameters with
	dwarf_sections parameter.  Change all callers.
	(read_line_info): Use dwarf_sections with ddata.
	(read_referenced_name): Likewise.
	(add_function_ranges): Likewise.
	(read_function_entry): Likewise.
	(read_function_info): Likewise.
	(build_dwarf_data): Replace specific section parameters with
	dwarf_sections parameter.  Change all callers.
	(backtrace_dwarf_add): Likewise.
	* elf.c (enum debug_section): Remove.
	(dwarf_section_names): Remove .zdebug names.
	(elf_add): Track zsections separately.  Build dwarf_sections.
	* pecoff.c (enum debug_section): Remove.
	(struct debug_section_info): Remove data field.
	(coff_add): Build dwarf_sections.
	* xcoff.c (enum dwarf_section): Remove.  Replace DWSECT_xxx
	references with DEBUG_xxx references.
	(xcoff_add): Build dwarf_sections.

2019-09-27  Maciej W. Rozycki  <macro@wdc.com>

	* configure: Regenerate.

2019-09-26  Ian Lance Taylor  <iant@golang.org>

	PR libbacktrace/91908
	* pecoff.c (backtrace_initialize): Explicitly cast unchecked
	__sync_bool_compare_and_swap to void.
	* xcoff.c (backtrace_initialize): Likewise.

2019-09-03  Ulrich Weigand  <uweigand@de.ibm.com>

	* configure.ac: Remove references to spu.
	* configure: Regenerate.

2019-05-24  Clement Chigot  <clement.chigot@atos.net>

	* Makefile.am (BUILDTESTS): Remove test_elf, add test_elf_32 and
	test_elf_64.
	* Makefile.in: Regenerate.

2019-05-14  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	* configure.ac (have_dl_iterate_phdr): Remove *-*-solaris2.10*
	handling.
	* configure: Regenerate.

2019-03-11  Ian Lance Taylor  <iant@golang.org>

	PR libbacktrace/89669
	* Makefile.am (BUILDTESTS): Only add ztest and ztest_alloc if
	HAVE_ELF.
	* Makefile.in: Regenerate.

2019-02-26  Tom de Vries  <tdevries@suse.de>

	* btest.c (test5): Allow global.* as minimal symbol name for global.

2019-02-26  Tom de Vries  <tdevries@suse.de>

	* Makefile.am (TESTS): Only add b3test_dwz_buildid if HAVE_DWZ.
	* Makefile.in: Regenerate.

2019-02-12  Tom de Vries  <tdevries@suse.de>

	PR libbacktrace/81983
	* dwarf.c (dwarf_lookup_pc): Don't call bsearch if nmemb == 0.

2019-02-10  Tom de Vries  <tdevries@suse.de>

	* Makefile.am (BUILDTESTS): Add btest_lto.
	* Makefile.in: Regenerate.
	* btest.c (test1, f2, f3, test3, f22, f23): Declare with
	__attribute__((noclone)).

2019-02-08  Tom de Vries  <tdevries@suse.de>

	* backtrace.c (backtrace_full): Declare with __attribute__((noinline)).
	* print.c (backtrace_print): Same.
	* simple.c (backtrace_simple): Same.

2019-02-08  Tom de Vries  <tdevries@suse.de>

	PR libbacktrace/78063
	* dwarf.c (build_address_map): Keep all parsed units.
	(read_referenced_name_from_attr): Handle DW_FORM_ref_addr.

2019-01-31  Tom de Vries  <tdevries@suse.de>

	PR libbacktrace/89136
	* elf.c (elf_add): Read build-id if with_buildid_data.  Fix
	'debugaltlink_name_len =+ 1'.

2019-01-29  Tom de Vries  <tdevries@suse.de>

	* install-debuginfo-for-buildid.sh.in: New script.
	* Makefile.am (check_PROGRAMS): Add b2test and b3test.
	(TESTS): Add b2test_buildid and b3test_dwz_buildid.
	* Makefile.in: Regenerate.
	* configure.ac (HAVE_ELF): Set with AM_CONDITIONAL.
	(READELF): Set with AC_CHECK_PROG.
	(install-debuginfo-for-buildid.sh): Generate with AC_CONFIG_FILES.
	* configure: Regenerate.
	* elf.c (SYSTEM_BUILD_ID_DIR): Factor out of ...
	(elf_open_debugfile_by_buildid): ... here.

2019-01-29  Tom de Vries  <tdevries@suse.de>

	* Makefile.am: Replace check_PROGRAMS with BUILDTESTS, except for
	allocfail.
	(TESTS): Don't add check_PROGRAMS. Add BUILDTESTS.
	(check_PROGRAMS): Add BUILDTESTS.
	* Makefile.in: Regenerate.

2019-01-28  Tom de Vries  <tdevries@suse.de>

	* Makefile.am (xcoff_%.c): Generate sed result into temporary file.
	Use $< to access prerequisite.
	* Makefile.in: Regenerate.

2019-01-25  Nathan Sidwell  <nathan@acm.org>

	* elf.c (elf_add): Pass "" filename to recursive call with
	separated debug.

2019-01-25  Tom de Vries  <tdevries@suse.de>

	* elf.c (elf_add): When handling .gnu_debugaltlink, call elf_add with
	filename == "".
	* Makefile.am (TESTS): Add btest_dwz_gnudebuglink.
	* Makefile.in: Regenerate.

2019-01-25  Tom de Vries  <tdevries@suse.de>

	* Makefile.am: Rewrite dtest rule into "%_gnudebuglink" pattern rule.
	(TESTS): Rename dtest to btest_gnudebuglink.
	* Makefile.in: Regenerate.

2019-01-23  Tom de Vries  <tdevries@suse.de>

	* dwarf.c (struct unit): Use size_t for low_offset/high_offset fields.
	(units_search, find_unit): Use size_t for offset.
	(build_address_map): Use size_t for unit_offset.

2019-01-20  Gerald Pfeifer  <gerald@pfeifer.com>

	* allocfail.c (main): Increase portability of printf statement.

2019-01-18  Ian Lance Taylor  <iant@golang.org>

	PR libbacktrace/88890
	* mmapio.c (backtrace_get_view): Change size parameter to
	uint64_t.  Check that value fits in size_t.
	* read.c (backtrace_get_view): Likewise.
	* internal.h (backtrace_get_view): Update declaration.
	* elf.c (elf_add): Pass shstrhdr->sh_size to backtrace_get_view.

2019-01-17  Tom de Vries  <tdevries@suse.de>

	PR libbacktrace/82857
	* configure.ac (DWZ): Set with AC_CHECK_PROG.
	(HAVE_DWZ): Set with AM_CONDITIONAL.
	* configure: Regenerate.
	* Makefile.am (TESTS): Add btest_dwz.
	* Makefile.in: Regenerate.

2019-01-17  Tom de Vries  <tdevries@suse.de>

	PR libbacktrace/82857
	* dwarf.c (enum attr_val_encoding): Add ATTR_VAL_REF_ALT_INFO.
	(read_attribute): Handle DW_FORM_GNU_ref_alt using
	ATTR_VAL_REF_ALT_INFO.
	(read_referenced_name_from_attr): Handle DW_FORM_GNU_ref_alt.

2019-01-17  Tom de Vries  <tdevries@suse.de>

	* dwarf.c (struct unit): Add low_offset and high_offset fields.
	(struct unit_vector): New type.
	(struct dwarf_data): Add units and units_counts fields.
	(find_unit): New function.
	(find_address_ranges): Add and handle unit_tag parameter.
	(build_address_map): Add and handle units_vec parameter.
	(build_dwarf_data): Pass units_vec to build_address_map.  Store resulting
	units vector.

2019-01-17  Tom de Vries  <tdevries@suse.de>

	PR libbacktrace/82857
	* dwarf.c (read_attribute): Handle DW_FORM_GNU_strp_alt
	using altlink.

2019-01-17  Tom de Vries  <tdevries@suse.de>

	* dwarf.c (enum attr_val_encoding): Add ATTR_VAL_NONE.
	(read_attribute): Add altlink parameter.  Handle missing altlink for
	DW_FORM_GNU_strp_alt and DW_FORM_GNU_ref_alt.
	(find_address_ranges, build_address_map, build_dwarf_data): Add and
	handle altlink parameter.
	(read_referenced_name, read_function_entry): Add argument to
	read_attribute call.

2019-01-17  Tom de Vries  <tdevries@suse.de>

	* dwarf.c (struct dwarf_data): Add altlink field.
	(backtrace_dwarf_add): Add and handle fileline_altlink parameter.
	* elf.c	(elf_add): Add argument to backtrace_dwarf_add call.
	(phdr_callback, backtrace_initialize): Add argument to elf_add calls.
	* internal.h (backtrace_dwarf_add): Add fileline_altlink parameter.
	* pecoff.c (coff_add): Add argument to backtrace_dwarf_add call.
	* xcoff.c (xcoff_add): Same.

2019-01-17  Tom de Vries  <tdevries@suse.de>

	* internal.h (backtrace_dwarf_add): Add fileline_entry parameter.
	* dwarf.c (backtrace_dwarf_add): Add and handle fileline_entry parameter.
	* elf.c	(elf_add): Add and handle fileline_entry parameter.  Add
	argument to backtrace_dwarf_add call.
	(phdr_callback, backtrace_initialize): Add argument to elf_add calls.
	* pecoff.c (coff_add): Add argument to backtrace_dwarf_add call.
	* xcoff.c (xcoff_add): Same.

2019-01-17  Tom de Vries  <tdevries@suse.de>

	* elf.c (elf_add): Add and handle with_buildid_data and
	with_buildid_size parameters.  Handle .gnu_debugaltlink section.
	(phdr_callback, backtrace_initialize): Add arguments to elf_add calls.

2019-01-16  Tom de Vries  <tdevries@suse.de>

	* dwarf.c (read_referenced_name_from_attr): New function.  Factor out
	of ...
 	(read_referenced_name): ... here, and ...
	(read_function_entry): ... here.

2019-01-16  Tom de Vries  <tdevries@suse.de>

	* dwarf.c (read_referenced_name): Don't allow DW_AT_name to override any
	name.
	(read_function_entry): Same.  Don't allow name found via
	DW_AT_abstract_origin or case DW_AT_specification to override linkage
	name.

2019-01-09  Sandra Loosemore  <sandra@codesourcery.com>

	PR other/16615

	* backtrace.h: Mechanically replace "can not" with "cannot".

2019-01-01  Jakub Jelinek  <jakub@redhat.com>

	Update copyright years.

2018-12-29  Gerald Pfeifer  <gerald@pfeifer.com>

	* Makefile.am (xcoff_%.c): Use an actual newline instead of \n
	in sed pattern.
	* Makefile.in: Regenerate.

2018-12-28  Tom de Vries  <tdevries@suse.de>

	* dwarf.c (build_address_map): Reuse unused units.

2018-12-28  Tom de Vries  <tdevries@suse.de>

	* dwarf.c (build_address_map): Simplify by removing local variable
	abbrevs.

2018-12-28  Ian Lance Taylor  <iant@golang.org>
	    Tom de Vries  <tdevries@suse.de>

	PR libbacktrace/88063
	* dwarf.c (free_unit_addrs_vector): Remove.
	(build_address_map): Keep track of allocated units in vector.  Free
	allocated units and corresponding abbrevs upon failure.  Remove now
	redundant call to free_unit_addrs_vector.  Free addrs vector upon
	failure.  Free allocated unit vector.

2018-12-28  Tom de Vries  <tdevries@suse.de>

	* dwarf.c (build_address_map): Free addrs vector upon failure.

2018-12-14  Tom de Vries  <tdevries@suse.de>

	PR testsuite/88491
	* allocfail.sh: Remove "set -o pipefail".

2018-12-12  Tom de Vries  <tdevries@suse.de>

	* Makefile.am (TESTS): Add allocfail.sh.
	(check_PROGRAMS): Add allocfail.
	* Makefile.in: Regenerate.
	* instrumented_alloc.c: New file.  Redefine malloc and realloc.
	Include alloc.c.
	* allocfail.c: New file.
	* allocfail.sh: New file.

2018-11-30  Tom de Vries  <tdevries@suse.de>

	* Makefile.am (check_PROGRAMS): Add test_elf, test_xcoff_32,
	test_xcoff_64, test_pecoff and test_unknown.
	* Makefile.in: Regenerate.
	* test_format.c: New file.

2018-11-30  Tom de Vries  <tdevries@suse.de>

	* Makefile.am : Add _with_alloc version for each test in
	check_PROGRAMS.
	* Makefile.in: Regenerate.

2018-11-30  Tom de Vries  <tdevries@suse.de>

	* internal.h (backtrace_vector_free): New static inline fuction,
	factored out of ...
	* dwarf.c (read_line_info): ... here.

2018-11-28  Tom de Vries  <tdevries@suse.de>

	* dwarf.c (read_abbrevs): Fix handling of abbrevs->abbrevs allocation
	failure.

2018-11-27  Tom de Vries  <tdevries@suse.de>

	* mmap.c (backtrace_vector_release): Same.
	* unittest.c (test1): Add check.

2018-11-27  Tom de Vries  <tdevries@suse.de>

	* alloc.c (backtrace_vector_release): Handle vec->size == 0 using free
	instead of realloc.
	* Makefile.am (check_PROGRAMS): Add unittest.
	* Makefile.in: Regenerate.
	* unittest.c: New file.

2018-11-22  Tom de Vries  <tdevries@suse.de>

	* dwarf.c (read_initial_length): Factor out of ...
	(build_address_map, read_line_info): ... here.

2018-11-21  Tom de Vries  <tdevries@suse.de>

	* dwarf.c (read_string): Factor out of ...
	(read_attribute, read_line_header, read_line_program): ... here.

2018-10-31  Joseph Myers  <joseph@codesourcery.com>

	PR bootstrap/82856
	* Makefile.am: Include multilib.am.
	* configure.ac: Remove AC_PREREQ.  Use AC_LANG_SOURCE.
	* Makefile.in, aclocal.m4, config.h.in, configure: Regenerate.

2018-10-05  Ian Lance Taylor  <iant@golang.org>

	PR libbacktrace/87529
	* backtrace.h: Document that backtrace_create_state should be
	called only once.

2018-08-05 Iain Buclaw  <ibuclaw@gdcproject.org>

	* configure.ac: Move define of HAVE_ZLIB into check for -lz.
	* Makefile.in: Regenerate.
	* config.h.in: Likewise.
	* configure: Likewise.

2018-08-01  Tony Reix  <tony.reix@atos.net>

	* xcoff.c (struct xcoff_line, struct xcoff_line_vector): Remove.
	(struct xcoff_func, struct xcoff_func_vector): New structs.
	(xcoff_syminfo): Drop leading dot from symbol name.
	(xcoff_line_compare, xcoff_line_search): Remove.
	(xcoff_func_compare, xcoff_func_search): New static functions.
	(xcoff_lookup_pc): Search function table.
	(xcoff_add_line, xcoff_process_linenos): Remove.
	(xcoff_initialize_fileline): Build function table.

2018-06-21 Denis Khalikov <d.khalikov@partner.samsung.com>

	PR other/86198
	* elf.c (elf_add): Increase ".note.gnu.build-id" section size
	checking up to 36 bytes.

2018-04-24  H.J. Lu  <hongjiu.lu@intel.com>

	* configure: Regenerated.

2018-04-19  Jakub Jelinek  <jakub@redhat.com>

	* configure: Regenerated.

2018-04-17  Ian Lance Taylor  <iant@golang.org>

	* backtrace.c: Revert last two changes.  Don't call mmap
	directly.

2018-04-17  Ian Lance Taylor  <iant@golang.org>

	* backtrace.c: Include backtrace-supported.h before checking
	BACKTRACE_USES_MALLOC.

2018-04-17  Ian Lance Taylor  <iant@golang.org>

	* backtrace.c (backtrace_full): When testing whether we can
	allocate memory, call mmap directly, and munmap the memory.

2018-04-04  Jakub Jelinek  <jakub@redhat.com>

	PR other/85161
	* elf.c (elf_zlib_fetch): Fix up predefined macro names in test for
	big endian, only use 32-bit loads if endianity macros are predefined
	and indicate big or little endian.

2018-02-14  Igor Tsimbalist  <igor.v.tsimbalist@intel.com>

	PR target/84148
	* configure: Regenerate.

2018-02-15  Jakub Jelinek  <jakub@redhat.com>

	PR other/82368
	* elf.c (SHT_PROGBITS): Undefine and define.

2018-02-14  Jakub Jelinek  <jakub@redhat.com>

	PR other/82368
	* elf.c (EM_PPC64, EF_PPC64_ABI): Undefine and define.
	(struct elf_ppc64_opd_data): New type.
	(elf_initialize_syminfo): Add opd argument, handle symbols
	pointing into the PowerPC64 ELFv1 .opd section.
	(elf_add): Read .opd section on PowerPC64 ELFv1, pass pointer
	to structure with .opd data to elf_initialize_syminfo.

2018-01-31  Ian Lance Taylor  <iant@golang.org>

	* elf.c (elf_add): Close descriptor if we use a debugfile.
	* btest.c (check_open_files): New static function.
	(main): Call check_open_files.

2018-01-25  Ian Lance Taylor  <iant@golang.org>

	* elf.c (elf_open_debugfile_by_debuglink): Don't check CRC if the
	desired CRC is zero.
	(elf_add): Don't clear *found_sym and *found_dwarf if debuginfo.

2018-01-25  Ian Lance Taylor  <iant@golang.org>

	* pecoff.c (coff_add): Only release syms_view if it is valid.

2018-01-25  Ian Lance Taylor  <iant@golang.org>

	* pecoff.c (coff_add): Another memcpy -> coff_read4 fix.

2018-01-24  Ian Lance Taylor  <iant@golang.org>

	* pecoff.c (coff_add): Use coff_read4, not memcpy.

2018-01-24  Ian Lance Taylor  <iant@golang.org>

	PR other/68239
	* mmap.c (backtrace_free_locked): Don't put more than 16 entries
	on the free list.

2018-01-19  Tony Reix  <tony.reix@atos.net>

	* xcoff.c (xcoff_incl_compare): New function.
	(xcoff_incl_search): New function.
	(xcoff_process_linenos): Use bsearch to find include file.
	(xcoff_initialize_fileline): Sort include file information.

2018-01-16  Ian Lance Taylor  <iant@golang.org>

	* elf.c (codes) [GENERATE_FIXED_HUFFMAN_TABLE]: Fix size to be
	288.
	(main) [GENERATE_FIXED_HUFFMAN_TABLE]: Pass 288 to
	elf_zlib_inflate_table.  Generate elf_zlib_default_dist_table.
	(elf_zlib_default_table): Update.
	(elf_zlib_default_dist_table): New static array.
	(elf_zlib_inflate): Use elf_zlib_default_dist_table for dist table
	for block type 1.
	* ztest.c (struct zlib_test): Add uncompressed_len.
	(tests): Initialize uncompressed_len field.  Add new test case.
	(test_samples): Use uncompressed_len field.

2018-01-03  Jakub Jelinek  <jakub@redhat.com>

	Update copyright years.

2017-11-17  Igor Tsimbalist  <igor.v.tsimbalist@intel.com>

	* configure.ac: Add CET_FLAGS to EXTRA_FLAGS.
	* aclocal.m4: Regenerate.
	* Makefile.in: Likewise.
	* configure: Likewise.

2017-10-06  Ian Lance Taylor  <iant@golang.org>

	* ztest.c (test_large): Pass unsigned long *, not size_t *, to
	zlib uncompress function.

2017-10-05  Ian Lance Taylor  <iant@golang.org>

	* elf.c (elf_zlib_fetch): Change pval argument to uint64_t *.
	Read a four byte integer.
	(elf_zlib_inflate): Change val to uint64_t.  Align pin to a 32-bit
	boundary before ever calling elf_zlib_fetch.
	* ztest.c (test_large): Simplify print statements a bit.

2017-10-02  Ian Lance Taylor  <iant@golang.org>

	* ztest.c: #include <errno.h>.
	(TEST_TIMING): Don't define, don't test.
	(xclock_gettime, xclockid_t): Define if !HAVE_CLOCK_GETTIME.
	(clockid_t, clock_gettime, CLOCK_REALTIME): Likewise.
	(ZLIB_CLOCK_GETTIME_ARG): Define.
	* configure.ac: Change clock_gettime_link to CLOCK_GETTIME_LINK.
	* Makefile.am: Likewise.
	* configure, Makefile.in: Rebuild.

2017-10-02  Thomas Schwinge  <thomas@codesourcery.com>

	PR other/67165
	* Makefile.am: Append the content of clock_gettime_link to
	ztest_LDADD.
	* configure.ac: Test for the case that clock_gettime is in librt.
	* Makefile.in: Regenerate.
	* configure: Likewise.

	PR other/67165
	* configure.ac: Check for clock_gettime.
	* config.h.in: Regenerate.
	* configure: Likewise.
	* ztest.c (average_time, test_large): Conditionalize test timing
	on clock_gettime availability.

2017-09-29  Tony Reix  <tony.reix@atos.net>

	* xcoff.c: Initial support for DWARF debug sections in XCOFF.
	(STYP_DWARF, SSUBTYP_DW*): Define.
	(enum dwarf_section): Define.
	(struct dwsect_info): Define.
	(xcoff_add): Look for DWARF sections, pass them to
	backtrace_dwarf_add.

2017-09-28  Ian Lance Taylor  <iant@golang.org>

	PR other/67165
	* elf.c (__builtin_prefetch): Define if not __GNUC__.
	(unlikely): Define.
	(SHF_UNCOMPRESSED, ELFCOMPRESS_ZLIB): Define.
	(b_elf_chdr): Define type.
	(enum debug_section): Add ZDEBUG_xxx values.
	(debug_section_names): Add names for new sections.
	(struct debug_section_info): Add compressed field.
	(elf_zlib_failed, elf_zlib_fetch): New static functions.
	(HUFFMAN_TABLE_SIZE, HUFFMAN_VALUE_MASK): Define.
	(HUFFMAN_BITS_SHIFT, HUFFMAN_BITS_MASK): Define.
	(HUFFMAN_SECONDARY_SHIFT): Define.
	(ZDEBUG_TABLE_SIZE): Define.
	(ZDEBUG_TABLE_CODELEN_OFFSET, ZDEBUG_TABLE_WORK_OFFSET): Define.
	(final_next_secondary): New static variable if
	BACKTRACE_GENERATE_FIXED_HUFFMAN_TABLE.
	(elf_zlib_inflate_table): New static function.
	(BACKTRACE_GENERATE_FIXED_HUFFMAN_TABLE): If define, define main
	function to produce fixed Huffman table.
	(elf_zlib_default_table): New static variable.
	(elf_zlib_inflate): New static function.
	(elf_zlib_verify_checksum): Likewise.
	(elf_zlib_inflate_and_verify): Likewise.
	(elf_uncompress_zdebug): Likewise.
	(elf_uncompress_chdr): Likewise.
	(backtrace_uncompress_zdebug): New extern function.
	(elf_add): Look for .zdebug sections and SHF_COMPRESSED debug
	sections, and uncompress them.
	* internal.h (backtrace_compress_zdebug): Declare.
	* ztest.c: New file.
	* configure.ac: Check for -lz and check whether the linker
	supports --compress-debug-sections.
	* Makefile.am (ztest_SOURCES): New variable.
	(ztest_CFLAGS, ztest_LDADD): New variables.
	(check_PROGRAMS): Add ztest.
	(ctestg_SOURCES): New variable.
	(ctestg_CFLAGS, ctestg_LDFLAGS, ctestg_LDADD): New variables.
	(ctesta_SOURCES): New variable.
	(ctesta_CFLAGS, ctesta_LDFLAGS, ctesta_LDADD): New variables.
	(check_PROGRAMS): Add ctestg and ctesta.
	* configure, config.h.in, Makefile.in: Rebuild.

2017-09-22  Ian Lance Taylor  <iant@golang.org>

	PR sanitizer/77631
	* configure.ac: Check for lstat and readlink.
	* elf.c (lstat, readlink): Provide dummy versions if real versions
	are not available.
	* configure, config.h.in: Rebuild.

2017-09-21  Ian Lance Taylor  <iant@google.com>

	PR go/82284
	* elf.c (backtrace_initialize): Set pd.exe_filename.

2017-09-20  Ian Lance Taylor  <iant@golang.org>
	    Denis Khalikov  <d.khalikov@partner.samsung.com>

	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  <sellcey@cavium.com>

	PR other/81096
	* Makefile.am (ttest_CFLAGS): Add $(AM_CFLAGS)
	* Makefile.in: Regenerate.

2017-09-12  Steve Ellcey  <sellcey@cavium.com>

	PR other/81096
	* libbacktrace/Makefile.in
	(HAVE_PTHREAD_TRUE@@NATIVE_TRUE@ttest_CFLAGS): Add $(AM_CFLAGS)

2017-08-02  David Edelsohn  <dje.gcc@gmail.com>

	PR bootstrap/81638
	* xcoff.c (xcoff_process_linenos): Initialize incl to NULL.

2017-07-28  Tony Reix  <tony.reix@atos.net>

	* xcoff.c: Don't leak a file descriptor if an archive is malformed.

2017-07-28  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	* fileline.c (fileline_initialize): Print pid_t as long.

2017-07-26  Tony Reix  <tony.reix@atos.net>

	* 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  <tony.reix@atos.net>

	* 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  <rguenther@suse.de>

	* configure.ac: Add AC_SYS_LARGEFILE.
	* config.h.in: Regenerate.
	* configure: Likewise.

2017-06-11  Ian Lance Taylor  <iant@golang.org>

	* 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  <thanm@google.com>

	* 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  <sam.thursfield@codethink.co.uk>

	* btest.c (test5): Replace #ifdef guard with 'unused' attribute
	to fix compile warning when BACKTRACE_SUPPORTED isn't defined.

2017-01-01  Jakub Jelinek  <jakub@redhat.com>

	Update copyright years.

2016-11-15  Matthias Klose  <doko@ubuntu.com>

	* configure: Regenerate.

2016-09-11  Carlos Liam  <carlos@aarzee.me>

	* all: Remove meaningless trailing whitespace.

2016-05-18  Uros Bizjak  <ubizjak@gmail.com>

	PR target/71161
	* elf.c (phdr_callback) [__i386__]: Add
	__attribute__((__force_align_arg_pointer__)).

2016-03-02  Maxim Ostapenko  <m.ostapenko@partner.samsung.com>

	* 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  <danglin@gcc.gnu.org>

	* mmap.c (MAP_FAILED): Define if not defined.

2016-01-04  Jakub Jelinek  <jakub@redhat.com>

	Update copyright years.

2015-12-18  Andris Pavenis  <andris.pavenis@iki.fi>

	* configure.ac: Specify that DJGPP do not have mmap
	even when sys/mman.h exists.
	* configure: Regenerate

2015-12-09  John David Anglin  <danglin@gcc.gnu.org>

	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  <iant@google.com>

	* posix.c (backtrace_open): Cast second argument of open() to int.

2015-09-11  Ian Lance Taylor  <iant@google.com>

	* Makefile.am (backtrace.lo): Depend on internal.h.
	(sort.lo, stest.lo): Add explicit dependencies.
	* Makefile.in: Rebuild.

2015-09-09  Hans-Peter Nilsson  <hp@axis.com>

	* backtrace.c: #include <sys/types.h>.

2015-09-08  Ian Lance Taylor  <iant@google.com>

	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  <iant@google.com>

	PR other/67457
	* mmap.c (backtrace_alloc): Correct test for mmap failure.

2015-08-31  Ulrich Weigand  <Ulrich.Weigand@de.ibm.com>

	* configure.ac: For spu-*-* targets, set have_fcntl to no.
	* configure: Regenerate.

2015-08-27  Ulrich Weigand  <Ulrich.Weigand@de.ibm.com>

	* 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  <hp@axis.com>

	* configure.ac: Only compile with -fPIC if the target
	supports it.
	* configure: Regenerate.

2015-08-24  Ulrich Weigand  <Ulrich.Weigand@de.ibm.com>

	* configure.ac: Set have_mmap to no on spu-*-* targets.
	* configure: Regenerate.

2015-08-13  Ian Lance Taylor  <iant@google.com>

	* dwarf.c (read_function_entry): Add vec_inlined parameter.
	Change all callers.

2015-06-11  Martin Sebor  <msebor@redhat.com>

	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  <gingold@adacore.com>

	* 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  <michael.haubenwallner@ssi-schaefer.com>

	* Makefile.in: Regenerated with automake-1.11.6.
	* aclocal.m4: Likewise.
	* configure: Likewise.

2015-01-24  Matthias Klose  <doko@ubuntu.com>

	* configure.ac: Move AM_ENABLE_MULTILIB before AC_PROG_CC.
	* configure: Regenerate.

2015-01-05  Jakub Jelinek  <jakub@redhat.com>

	Update copyright years.

2014-11-21  H.J. Lu  <hongjiu.lu@intel.com>

	PR bootstrap/63784
	* configure: Regenerated.

2014-11-11  David Malcolm  <dmalcolm@redhat.com>

	* ChangeLog.jit: New.

2014-11-11  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>

	PR target/63610
	* configure: Regenerate.

2014-10-23  Ian Lance Taylor  <iant@google.com>

	* internal.h (backtrace_atomic_load_pointer) [no atomic or sync]:
	Fix to return void *.

2014-05-08  Ian Lance Taylor  <iant@google.com>

	* 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  <iant@google.com>

	* sort.c (backtrace_qsort): Use middle element as pivot.

2014-03-06  Ian Lance Taylor  <iant@google.com>

	* 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  <misty@brew.sh>

	PR target/58710
	* configure.ac: Use AC_LINK_IFELSE in check for
	_Unwind_GetIPInfo.
	* configure: Regenerate.

2014-01-02  Richard Sandiford  <rdsandiford@googlemail.com>

	Update copyright years

2013-12-06  Jakub Jelinek  <jakub@redhat.com>

	* 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  <iant@google.com>

	* 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  <iant@google.com>

	* 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  <jakub@redhat.com>

	* 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  <iant@google.com>

	* 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  <jakub@redhat.com>

	* 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  <iant@google.com>

	* backtrace.h (backtrace_create_state): Correct comment about
	threading.

2013-11-15  Ian Lance Taylor  <iant@google.com>

	* 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  <iant@google.com>

	* elf.c (elf_add): Don't get the wrong offsets if a debug section
	is missing.

2013-10-15  David Malcolm  <dmalcolm@redhat.com>

	* 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  <amodra@gmail.com>

	* configure: Regenerate.

2013-07-23  Alexander Monakov  <amonakov@ispras.ru>

	* elf.c (elf_syminfo): Loop over the elf_syminfo_data chain.

2013-07-23  Alexander Monakov  <amonakov@ispras.ru>

	* elf.c (backtrace_initialize): Pass elf_fileline_fn to
	dl_iterate_phdr callbacks.

2013-03-25  Ian Lance Taylor  <iant@google.com>

	* alloc.c: #include <sys/types.h>.
	* mmap.c: Likewise.

2013-01-31  Ian Lance Taylor  <iant@google.com>

	* 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  <jakub@redhat.com>

	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  <iant@google.com>

	* 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  <rdsandiford@googlemail.com>

	Update copyright years.

2013-01-01  Ian Lance Taylor  <iant@google.com>

	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  <iant@google.com>

	PR other/55536
	* mmap.c (backtrace_alloc): Don't call sync functions if not
	threaded.
	(backtrace_free): Likewise.

2012-12-12  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>

	* mmapio.c: Define MAP_FAILED if not defined.

2012-12-11  Jakub Jelinek  <jakub@redhat.com>

	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  <jakub@redhat.com>

	PR bootstrap/54926
	* Makefile.am (AM_CFLAGS): Add -frandom-seed=$@.
	* Makefile.in: Regenerated.

2012-11-20  Ian Lance Taylor  <iant@google.com>

	* dwarf.c (read_attribute): Always clear val.

2012-11-13  Ian Lance Taylor  <iant@google.com>

	PR other/55312
	* configure.ac: Only add -Werror if building a target library.
	* configure: Rebuild.

2012-11-12  Ian Lance Taylor  <iant@google.com>
	    Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
	    Gerald Pfeifer  <gerald@pfeifer.com>

	* 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  <iant@google.com>

	* mmap.c (backtrace_vector_release): Correct last patch: add
	aligned, not size.

2012-10-29  Ian Lance Taylor  <iant@google.com>

	* mmap.c (backtrace_vector_release): Make sure freed block is
	aligned on 8-byte boundary.

2012-10-26  Ian Lance Taylor  <iant@google.com>

	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  <howarth@bromo.med.uc.edu>

	PR target/55061
	* configure.ac: Check for _Unwind_GetIPInfo function declaration.
	* configure: Regenerate.

2012-10-24  Ian Lance Taylor  <iant@google.com>

	PR target/55061
	* configure.ac: Check whether -funwind-tables option works.
	* configure: Rebuild.

2012-10-11  Ian Lance Taylor  <iant@google.com>

	* configure.ac: Do not use dl_iterate_phdr on Solaris 10.
	* configure: Rebuild.

2012-10-10  Ian Lance Taylor  <iant@google.com>

	* elf.c: Rename all Elf typedefs to start with b_elf, and be all
	lower case.

2012-10-10  Hans-Peter Nilsson  <hp@bitrange.com>

	* elf.c (elf_add_syminfo_data): Add casts to avoid warning.

2012-10-09  Ian Lance Taylor  <iant@google.com>

	* dwarf.c (dwarf_fileline): Add cast to avoid warning.
	(backtrace_dwarf_add): Likewise.

2012-10-09  Ian Lance Taylor  <iant@google.com>

	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  <gerald@pfeifer.com>

	* btest.c (f23): Avoid uninitialized variable warning.

2012-10-04  Ian Lance Taylor  <iant@google.com>

	* dwarf.c: If the system header files do not declare strnlen,
	provide our own version.

2012-10-03  Ian Lance Taylor  <iant@google.com>

	* dwarf.c (read_uleb128): Fix overflow test.
	(read_sleb128): Likewise.
	(build_address_map): Don't change unit_buf.start.

2012-10-02  Uros Bizjak  <ubizjak@gmail.com>

	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  <iant@google.com>

	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  <iant@google.com>

	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  <iant@google.com>

	PR other/54726
	* elf.c (backtrace_initialize): Set *fileln_fn, not
	state->fileln_fn.

2012-09-19  Ian Lance Taylor  <iant@google.com>

	* configure.ac: Only use GCC_CHECK_UNWIND_GETIPINFO when compiled
	as a target library.
	* configure: Rebuild.

2012-09-19  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
	    Ian Lance Taylor  <iant@google.com>

	* 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  <iant@google.com>

	PR bootstrap/54623
	* Makefile.am (AM_CPPFLAGS): Define.
	(AM_CFLAGS): Remove -I options.
	* Makefile.in: Rebuild.

2012-09-18  Ian Lance Taylor  <iant@google.com>

	* 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  <iant@google.com>

	* btest.c (test1, test2, test3, test4): Add the unused attribute.

2012-09-18  Ian Lance Taylor  <iant@google.com>

	* dwarf.c: Correct test of HAVE_DECL_STRNLEN.

2012-09-18  Ian Lance Taylor  <iant@google.com>

	* 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  <iant@google.com>

	* configure.ac: Check whether strnlen is declared.
	* dwarf.c: Declare strnlen if not declared.
	* configure, config.h.in: Rebuild.

2012-09-18  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	* fileline.c: Include <stdlib.h>.
	* mmap.c: Likewise.

2012-09-17  Ian Lance Taylor  <iant@google.com>

	PR bootstrap/54611
	* nounwind.c (backtrace_full): Rename from backtrace.  Add state
	parameter.

2012-09-17  Gerald Pfeifer  <gerald@pfeifer.com>

	PR bootstrap/54611
	* nounwind.c (backtrace_simple): Add state parameter.

2012-09-17  Ian Lance Taylor  <iant@google.com>

	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  <iant@google.com>

	* Initial implementation.

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