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Ian Lance Taylor 735c54d9dc libbacktrace: handle MOREDATA correctly without debug info 
Based on patch from Andi Kleen.

	* elf.c (elf_nodebug): Handle state->moredata.
	* fileline.c (backtrace_syminfo_to_full_callback): Remove
	incorrect comment about MOREDATA.
	(backtrace_syminfo_to_full_callback_moredata): New function.
	* internal.h (backtrace_syminfo_to_full_callback_moredata):
	Declare.
	* strippedtest.c: New file.
	* configure.ac: check whether objcopy supports --strip-debug.
	* Makefile.am (strippedtest_SOURCES): New variable.
	(strippedtest_CFLAGS, strippedtest_LDFLAGS): Likewise.
	(strippedtest_LDADD): Likewise.
	(check_PROGRAMS): Add strippedtest.
	(MAKETESTS): Add strippedtest_stripped
	(%_stripped): New rule.
	* configure, Makefile.in: Regenerate.
 2026-09-01 15:17:39 -07:00
Ian Lance Taylor 3bd5a08e4f libbacktrace: use BACKTRACE_MOREDATA_VERSION rather than 3 
Patch from Andi Kleen.

	* pecoff.c (coff_syminfo): Use BACKTRACE_MOREDATA_VERSION.
	* xcoff.c (xcoff_syminfo): Likewise.
	(xcoff_lookup_pc): Likewise.
	(xcoff_fileline): Likewise.
	* unknown.c (unknown_fileline): Likewise.
 2026-09-01 15:11:24 -07:00
Ian Lance Taylor 6d913c4521 libbacktrace: report decl_lineno with MOREDATA 
Based on patch by Andi Kleen.

	* backtrace.h (struct backtrace_moredata): Add
	backtrace_decl_lineno field.
	* internal.h (BACKTRACE_MOREDATA_VERSION): Change to 4.
	* dwarf.c (struct function): Add decl_lineno field.
	(call_callback): Add decl_lineno parameter. Change all callers.
	(read_referenced_name_from_attr): Likewise.
	(read_referenced_name): Likewise.
	(report_inlined_functions): Likewise.
	(read_function_entry): Set decl_lineno field.
	(dwarf_lookup_pc): Handle decl_lineno across inlines.
	* mdtest.c (struct mdinfo): Define.
	(struct mddata): Define.
	(md_callback_one): Adjust for mddata.
	(md_callback_three): Likewise.
	(test1, f2): Reformat for simpler line number testing.
	(f3): Test that decl_lineno is correct.
	(f13): Adjust for mddata.
 2026-08-31 12:42:36 -07:00
Ian Lance Taylor 6f8310e238 libbacktrace: support returning discriminator field 
Based on patch from Andi Kleen.

	* backtrace.h (backtrace_create_state): Rewrite comment to change
	threaded parameter to flags.
	(backtrace_full_callback, backtrace_syminfo_callback): Document
	behavior change if moredata flag is set.
	(struct backtrace_moredata): Define.
	* backtrace-supported.h.in (BACKTRACE_SUPPORTS_MOREDATA): Define.
	* internal.h (struct backtrace_state): Add moredata field.
	(BACKTRACE_MOREDATA_VERSION): Define.
	* state.c (backtrace_create_state): Change threaded parameter to
	flags.  Set state moredata field based on flags.
	* dwarf.c (struct line): Add disc field.
	(struct function): Add caller_disc field.
	(call_callback): New static function.
	(add_line): Add disc parameter.  Change all callers.  Store disc
	in new line value.
	(read_line_program): Track discriminator value.
	(read_line_info): Initialize disc field in final line entry.
	(read_function_entry): Handle DW_AT_GNU_discriminator.
	(report_inlined_functions): Add disc parameter. Change all
	callers. Call call_callback rather than calling callback
	directly.
	(dwarf_lookup_pc): Handle inlined discriminators. Call
	call_callback rather than calling callback directly.
	(dwarf_fileline): Call call_callback rather than calling callback
	directly.
	* elf.c (elf_syminfo): Pass moredata if requested.
	* macho.c (macho_syminfo): Likewise.
	* pecoff.c (coff_syminfo): Likewise.
	* xcoff.c (xcoff_syminfo): Likewise.
	(xcoff_lookup_pc): Likewise.
	* backtrace.c: #include <string.h>.
	(unwind): Pass moredata if requested.
	* unknown.c: #include <string.h>.
	(unknown_fileline): Pass moredata if requested.
	* fileline.c (backtrace_syminfo_to_full_callback): Add comment
	about moredata.
	* mdtest.c: New test file.
	* Makefile.am (mdtest_SOURCES): Define.
	(mdtest_CFLAGS, mdtest_LDFLAGS, mdtest_LDADD): Define.
	(BUILDTESTS): Add mdtest.
	* Makefile.in: Regenerate.
 2026-07-06 12:42:21 -07:00
Ian Lance Taylor 5f4a6d4941 libbacktrace: set table field for zstd RLE sequence 
Patch from Ivan Molodetskikh.

	* elf.c (elf_zstd_unpack_seq_decode): Set table field for RLE
	sequence.
	* zstdtest.c (tests): Add rle-sequence-tables test.
 2026-06-27 09:09:58 -07:00
Ian Lance Taylor 058d953bb7 libbacktrace: support window size in zstd decompression 
Reportedly this occurs on AerynOS.

Patch from Ivan Molodetskikh.

	* elf.c (elf_zstd_decompress_frame): Support a compressed block
	that does not set the single segment flag.
	* zstdtest.c (tests): Add tests without single segment.
 2026-06-27 08:53:22 -07:00
Ian Lance Taylor 549b81b43b libbacktrace: support compressed block with no sequences 
* elf.c (elf_zstd_decompress_frame): Support a compressed block
	with no sequences, only literals.

Fixes #164
 2026-06-01 21:39:35 -07:00
Ian Lance Taylor 96664e69b1 libbacktrace: support multiple zstd frames 
Based on patch by GitHub user ofats.

	* elf.c (elf_zstd_decompress_frame): New static function,
	broken out of elf_zstd_decompress.
	(elf_zstd_decompress): Call elf_zstd_decompress_frame in a loop.
	* zstdtest.c (test_large): Compress the file in chunks.
 2026-05-03 18:30:11 -07:00
Ian Lance Taylor ab3c042b80 libbacktrace: don't use ZSTD_CLEVEL_DEFAULT 
PR 117812 reports that testing GCC with zstd 1.3.4 fails because
ZSTD_CLEVEL_DEFAULT is not defined, so avoid using it.

	PR libbacktrace/117812
	* zstdtest.c (test_large): Use 3 rather than ZSTD_CLEVEL_DEFAULT
 2026-05-03 18:30:08 -07:00
Ian Lance Taylor b9e40069c0 libbacktrace: use correct names in #undef of ELF macros 
Patch from Joseph Koshy.

	* elf.c (ELFMAGn): In #undef rename from ELF_MAGn.
 2025-11-06 11:30:33 -08:00
Ian Lance Taylor 2f67a3abfd libbacktrace: recognize PE bigobj objects at configure time 
Patch from Christopher Wellons.

	* filetype.awk: Recognize PE bigobj objects at configure time.
 2025-09-28 14:48:55 -07:00
Ian Lance Taylor 0034e33946 libbacktrace: add cast to avoid undefined shift 
Patch from pgerell@github.

	* elf.c (elf_uncompress_lzma_block): Add casts to avoid
	potentially shifting a value farther than its type size.
 2025-02-10 15:04:43 -08:00
Ian Lance Taylor 78af4ffa26 libbacktrace: add casts to avoid undefined shifts 
Patch from pgerell@github.

	* elf.c (elf_fetch_bits): Add casts to avoid potentially shifting
	a value farther than its type size.
	(elf_fetch_bits_backward): Likewise.
	(elf_uncompress_lzma_block): Likewise.
	(elf_uncompress_lzma): Likewise.
 2025-01-30 15:24:13 -08:00
Ian Lance Taylor 1db85642e3 libbacktrace: use WIN32_LEAN_AND_MEAN, not WIN32_MEAN_AND_LEAN 
Patch from awmorgan.

	* fileline.c: Use WIN32_LEAN_AND_MEAN, not WIN32_MEAN_AND_LEAN.
	* pecoff.c: Likewise.

Fixes #144
 2024-11-29 13:21:28 -08:00
Ian Lance Taylor d48f84034c libbacktrace: recognize new Mach-O DWARF sections 
Patch from Pavel Safonov.

These sections are used on macOS Sequoia.

Fixes #136

	* macho.c (dwarf_section_names): Add __debug_addr and
	__debug_line_str.
 2024-10-25 15:21:34 -07:00
Ian Lance Taylor 3d0be55844 libbacktrace: don't get confused by overlapping address ranges 
Fixes https://github.com/ianlancetaylor/libbacktrace/issues/137.

	* dwarf.c (resolve_unit_addrs_overlap_walk): New static function.
	(resolve_unit_addrs_overlap): New static function.
	(build_dwarf_data): Call resolve_unit_addrs_overlap.
 2024-10-18 13:04:47 -07:00
Ian Lance Taylor 86885d1404 libbacktrace: update xcoff.c for base_address changes 
* xcoff.c (struct xcoff_fileline_data): Change base_address field
	to struct libbacktrace_base_address.
	(xcoff_initialize_syminfo): Change base_address to struct
	libbacktrace_base_address.  Use libbacktrace_add_base.
	(xcoff_initialize_fileline): Likewise.
	(xcoff_lookup_pc): Use libbacktrace_add_base.
	(xcoff_add): Change base_address to struct
	libbacktrace_base_address.
	(xcoff_armem_add, xcoff_add_shared_libs): Likewise.
	(backtrace_initialize): Likewise.
	* Makefile.am (xcoff.lo): Remove unused target.
	(xcoff_32.lo, xcoff_64.lo): New targets.
	* Makefile.in: Regenerate.
 2024-08-05 16:54:56 -07:00
Ian Lance Taylor 6ce91a2ef7 libbacktrace: avoid -Wpointer-arith errors 
Based on patch from Kirill Müller.

	* configure.ac (ACX_PROG_CC_WARNING_OPTS): Add -Wpointer-arith.
	* pecoff.c (coff_add): Cast void pointers.
	* xcoff.c (xcoff_add): Likewise.
	* configure: Regenerate.
 2024-08-05 16:49:57 -07:00
Ian Lance Taylor 0dd27b95f9 libbacktrace: fix syntax of Windows registration functions 
Adjust the syntax to keep MSVC happy.

Fixes #131

	* pecoff.c (LDR_DLL_NOTIFICATION): Put function modifier
	inside parentheses.
	(LDR_REGISTER_FUNCTION): Likewise.
 2024-07-30 09:28:33 -07:00
Ian Lance Taylor 7e2b7da3d6 libbacktrace: use __has_attribute for fallthrough 
Also convert some FALLTHROUGH comments to ATTRIBUTE_FALLTHROUGH.

	* internal.h: Use __has_attribute to check for fallthrough
	attribute.
	* elf.c (elf_zstd_decompress): Use ATTRIBUTE_FALLTHROUGH rather
	than a FALLTHROUGH comment.
 2024-07-18 11:37:33 -07:00
Ian Lance Taylor f37b51de9b libbacktrace: add cast to avoid warning 
* print.c (print_syminfo_callback): Add cast to avoid warning.
 2024-07-17 18:00:03 -07:00
Ian Lance Taylor 9e10af0e8f libbacktrace: better backtrace_print when no debug info 
Fixes #59

	* print.c (print_syminfo_callback): New static function.
	(print_callback): Call backtrace_syminfo if there is no function
	or file name.
 2024-07-17 17:40:19 -07:00
Ian Lance Taylor 8e32931a4f libbacktrace: add notes about dl_iterate_phdr to README 
* README: Add notes about dl_iterate_phdr.

For #20
 2024-07-17 17:06:51 -07:00
Ian Lance Taylor 1dd5c408fe libbacktrace: support FDPIC 
Based on patch by Max Filippov.

	* internal.h: If FDPIC, #include <link.h> and/or <sys/link.h>.
	(libbacktrace_using_fdpic): Define.
	(struct libbacktrace_base_address): Define.
	(libbacktrace_add_base): Define.
	(backtrace_dwarf_add): Change base_address to struct
	libbacktrace_base_address.
	* dwarf.c (struct dwarf_data): Change base_address to struct
	libbacktrace_base_address.
	(add_ranges, find_address_ranges, build_ddress_map): Likewise.
	(build_dwarf_data, build_dwarf_add): Likewise.
	(add_low_high_range): Change base_address to struct
	libbacktrace_base_address.  Use libbacktrace_add_base.
	(add_ranges_from_ranges, add_ranges_from_rnglists): Likewise.
	(add_line): Use libbacktrace_add_base.
	* elf.c (elf_initialize_syminfo): Change base_address to struct
	libbacktrace_base_address.  Use libbacktrace_add_base.
	(elf_add): Change base_address to struct
	libbacktrace_base_address.
	(phdr_callback): Likewise.  Initialize base_address.m.
	(backtrace_initialize): If using FDPIC, don't call elf_add with
	main executable; always use dl_iterate_phdr.
	* macho.c (macho_add_symtab): Change base_address to struct
	libbacktrace_base_address.  Use libbacktrace_add_base.
	(macho_syminfo): Change base_address to struct
	libbacktrace_base_address.
	(macho_add_fat, macho_add_dsym, macho_add): Likewise.
	(backtrace_initialize): Likewise.  Initialize base_address.m.
	* pecoff.c (coff_initialize_syminfo): Change base_address to
	struct libbacktrace_base_address.  Use libbacktrace_add_base.
	(coff_add): Change base_address to struct
	libbacktrace_base_address.  Initialize base_address.m.
 2024-07-15 17:29:35 -07:00
Ian Lance Taylor febbb9bff9 libbacktrace: avoid infinite recursion 
We could get an infinite recursion in an odd case in which a
.gnu_debugdata section was added to a debug file, and mini_debuginfo
was put into the debug file, and the debug file was put into a
/usr/lib/debug directory to be found by build ID.  This combination
doesn't really make sense but we shouldn't get an infinite recursion.

	* elf.c (elf_add): Don't use .gnu_debugdata if we are already
	reading a debuginfo file.
	* Makefile.am (m2test_*): New test targets.
	(CHECK_PROGRAMS): Add m2test.
	(MAKETESTS): Add m2test_minidebug2.
	(%_minidebug2): New pattern.
	(CLEANFILES): Remove minidebug2 files.
	* Makefile.in: Regenerate.

Fixes #129
 2024-07-11 19:36:00 -07:00
Ian Lance Taylor 1023a09511 libbacktrace: improve XCOFF support 
libbacktrace/ChangeLog:
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.
 2024-07-11 18:44:19 -07:00
Ian Lance Taylor dbb5fd82bc libbacktrace: correct duplicate configury 
I accidentally duplicated the autoconf config files in the top level
directory and the config directory.  Fix that, and regenerate
Makefile.in and configure.
 2024-07-11 18:36:00 -07:00
Ian Lance Taylor e3def4fa6e libbacktrace: update libtool.m4 to current GCC HEAD 2024-07-11 18:31:47 -07:00
Ian Lance Taylor 8c05bcb94f libbacktrace: update copyright years 2024-07-11 18:14:01 -07:00
Ian Lance Taylor 0cb5d00374 libbacktrace: don't fail if symbol size is unknown 
* btest.c (test5): Don't fail if symbol size is 0.
	* mtest.c (test5): Likewise.
 2024-07-11 18:00:38 -07:00
Ian Lance Taylor 3fda5a8759 libbacktrace: correctly gather Mach-O symbol table 
For PR libbacktrace/97082.
	* macho.c (MACH_O_N_EXT): Don't define.
	(MACH_O_N_UNDF): Define.
	(macho_defined_symbol): Don't discard N_EXT symbols.  Do
	discard N_UNDF symbols.
 2024-07-11 17:57:40 -07:00
Ian Lance Taylor d4bdca038e libbacktrace: fix testsuite for clang 
* btest.c (test1, test3): Add optnone attribute.
	* edtest.c (test1): Likewise.
	* mtest.c (test1, test3): Likewise.
	* configure.ac: Use -Wno-attributes and -Wno-unknown-attributes.
	* configure: Regenerate.
 2024-07-11 16:13:11 -07:00
Ian Lance Taylor e3e64ddd18 libbacktrace: suggest how to fix missing debug info 
* elf.c (elf_nodebug): Suggest -g.
	* macho.c (macho_nodebug): Suggest -g and dsymutil.
	* pecoff.c (coff_nodebug): Suggest -g.

Fixes #122
 2024-07-11 15:42:10 -07:00
Ian Lance Taylor f69acdfbd6 libbacktrace: remove trailing whitespace 
* dwarf.c: Remove trailing whitespace.
	* macho.c: Likewise.

Fixes #124
 2024-07-11 15:30:09 -07:00
Ian Lance Taylor 4ead348bb4 libbacktrace: it's OK if zstd decompressor sees no backward bits 
* elf.c (elf_fetch_bits_backward) Don't fail if no bits are
	available.
 2024-06-26 09:12:25 -07:00
Ian Lance Taylor 11427f31a6 libbacktrace: add DLLS as they are loaded 
Patch from Björn Schäpers.

	* pecoff.c (struct dll_notification_data): Define.
	(LDR_DLL_NOTIFICATION): New typedef.
	(LDR_REGISTER_FUNCTION): New typedef.
	(struct dll_notification_context): Define.
	(dll_notification): New static function.
	(backtrace_initialize): Register DLL notification.
 2024-05-03 15:27:21 -07:00
Ian Lance Taylor 0e933e763f libbacktrace: load Windows modules 
Patch from Björn Schäpers <bjoern@hazardy.de>.

	* configure.ac: Checked for tlhelp32.h
	* pecoff.c: Include <tlhelp32.h> if available.
	(backtrace_initialize): Use tlhelp32 api for a snapshot to
	detect loaded modules.
	(coff_add): New argument for the module handle of the file,
	to get the base address.
	* configure, config.h.in: Regenerate.
 2024-05-01 10:40:39 -07:00
Ian Lance Taylor ae1e707dba libbacktrace: test --compress-debug-sections=ARG for each ARG 
This should fix a testsuite problem with Solaris ld that supports zlib
but not zlib-gabi.

	* configure.ac: Test --compress-debug-sections=zlib-gnu and
	--compress-debug-sections=zlib-gabi separately, setting new
	automake conditionals.
	* Makefile.am (ctestg, ctestg_alloc): Only build if
	HAVE_COMPRESSED_DEBUG_ZLIB_GNU.
	(ctesta, ctesta_alloc): Only build if
	HAVE_COMPRESSED_DEBUG_ZLIB_GABI.
	(ctestzstd_alloc): New test if HAVE_COMPRESSED_DEBUG_ZSTD.
	* configure, Makefile.in: Regenerate.
 2024-04-23 10:17:03 -07:00
Ian Lance Taylor 7ead8c1ea2 libbacktrace: don't assume compressed section is aligned 
Patch originally by GitHub user ubyte at
https://github.com/ianlancetaylor/libbacktrace/pull/120.

	* elf.c (elf_uncompress_chdr): Don't assume compressed section is
	aligned.
 2024-03-08 13:57:13 -08:00
Ian Lance Taylor f41cf1fecb libbacktrace: pass -no-install when linking test programs 
* Makefile.am (libbacktrace_testing_ldflags): Define.
	(*_LDFLAGS): Add $(libbacktrace_testing_ldflags) for test
	programs.
	* Makefile.in: Regenerate
 2024-03-02 13:12:16 -08:00
Ian Lance Taylor 28824f2cc9 libbacktrace: skip all LZMA block header padding bytes 
* elf.c (elf_uncompress_lzma_block): Skip all header padding bytes
	and verify that they are zero.

Fixes #118
 2024-03-02 12:18:17 -08:00
Ian Lance Taylor 592e9c8727 libbacktrace: use real .opd for debuginfo on ppc64 v1 ABI 
PR libbacktrace/114201
	* elf.c (elf_add): Add caller_opd parameter.  Change all callers.
	Release opd data after all recursive calls.
 2024-03-02 07:09:12 -08:00
Ian Lance Taylor 36cfdc18ed libbacktrace: read symbol table of debuginfo file 
These become another symbol table to search.  This is needed if people
use --strip-all rather than --strip-debug when adding a debuglink
section.

Patch is from GitHub user pickard1.

Fixes #113

	* elf.c (elf_add): Add the symbol table from a debuginfo file.
	* Makefile.am (MAKETESTS): Add buildidfull and gnudebuglinkfull
	variants of buildid and gnudebuglink tests.
	(%_gnudebuglinkfull, %_buildidfull): New patterns.
	* Makefile.in: Regenerate.
 2024-02-29 19:48:38 -08:00
Ian Lance Taylor 14818b7783 libbacktrace: support ASLR on Windows 
Patch from Björn Schäpers.

	* pecoff.c: Include <windows.h> if available.
	(coff_add): On Windows call GetModuleHandle to get base address.
 2023-11-30 11:46:57 -08:00
Ian Lance Taylor 25889d241c libbacktrace: call GetModuleFileNameA on Windows 
Patch from Björn Schäpers.

	* fileline.c: Include <windows.h> if available.
	(windows_get_executable_path): New static function.
	(fileline_initialize): Call windows_get_executable_path.
	* configure.ac: Checked for windows.h
	* configure: Regenerate.
	* config.h.in: Regenerate.
 2023-11-29 14:09:55 -08:00
Ian Lance Taylor c1c86fa2f0 libbacktrace: look for _pgmptr on Windows 
Patch from Andres Freund:
	* configure.ac: Check for _pgmptr declaration.
	* fileline.c (fileline_initialize): Check for _pgmfptr before
	/proc/self/exec.
	* configure, config.h.in: Regenerate.
 2023-07-31 17:02:14 -07:00
Ian Lance Taylor cdb64b688d libbacktrace: minor fixes for zstd decompression 
* 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.
 2023-03-28 13:10:54 -07:00
Ian Lance Taylor afe2967c77 libbacktrace: change PC variables from uint64_t to uintptr_t 
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.
 2023-01-20 14:25:38 -08:00
Ian Lance Taylor ad106d5fdd libbacktrace: don't run --build-id tests if it is not supported 
PR libbacktrace/108297
	* configure.ac: Test whether linker supports --build-id.
	* Makefile.am: Only run --build-id tests if supported.
	* configure, Makefile.in: Regenerate.
 2023-01-06 09:46:08 -08:00
Ian Lance Taylor da7eff2f37 libbacktrace: unpack literals into output buffer 
* 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.<
 2022-12-16 18:53:11 -08:00
Ian Lance Taylor fd9442f7b5 libbacktrace: rewrite and simplify main zstd loop 
* 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.
 2022-12-09 17:47:18 -08:00
Ian Lance Taylor c992dd8a9b libbacktrace: support zstd decompression 
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.
 2022-12-07 16:27:12 -08:00
Ian Lance Taylor 8602fda64e libbacktrace: check for sys/link.h 
QNX uses sys/link.h rather than link.h for dl_iterate_phdr

Fixes #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.
 2022-07-08 10:35:17 -07:00
Ian Lance Taylor 7409767403 libbacktrace: don't exit Mach-O dyld library loop on one failure 
* 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 #85
 2022-07-07 16:55:51 -07:00
Ian Lance Taylor bc78542d20 libbacktrace: don't let "make clean" remove allocfail.sh 
* Makefile.am (MAKETESTS): New variable split out of TESTS.
	(CLEANFILES): Replace TESTS with BUILDTESTS and MAKETESTS.
	* Makefile.in: Regenerate.

Fixes #81
 2022-07-07 16:18:23 -07:00
Ian Lance Taylor b6ddb3aa1b libbacktrace: replace fgrep with grep in configure script 
Patch by Xi Ruoyao.

	* configure.ac: Use grep instead of fgrep.
	* configure: Regenerate.
 2022-07-07 15:46:41 -07:00
Ian Lance Taylor 4d2dd0b172 libbacktrace: don't skip initial aligned byte in uncompressed block 
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.
 2022-04-05 16:10:04 -07:00
Ian Lance Taylor 2446c66076 libbacktrace: gather address ranges from skeleton units 
* dwarf.c (find_address_ranges): Handle skeleton units.
	(read_function_entry): Likewise.
 2022-02-17 08:27:13 -08:00
Ian Lance Taylor 509f74a2fb libbacktrace: initialize DWARF 5 fields of unit 
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.
 2022-02-16 11:42:40 -08:00
Ian Lance Taylor c062afc28c configury: support --disable-werror 2022-02-16 11:41:40 -08:00
Ian Lance Taylor 332522e199 configury: update to recent versions 
Copied from GCC tip.

Fixes #84
 2022-01-18 20:10:43 -08:00
Ian Lance Taylor d0f5e95a87 config/override.m4: don't require exactly autoconf 2.69 
Fixes #71
Fixes #74
 2021-05-29 14:17:08 -07:00
Ian Lance Taylor 4f57c99971 libbacktrace: don't special case file 0 
It's no longer necessary as file 0 is now set up in all cases.

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

Fixes #69
 2021-03-02 18:17:36 -08:00
Ian Lance Taylor 59473f7906 libbacktrace: pass -1 to error callback for unrecognized DWARF 
PR libbacktrace/98818
	* dwarf.c (dwarf_buf_error): Add errnum parameter.  Change all
	callers.
	* backtrace.h: Update backtrace_error_callback comment.
 2021-03-02 13:49:18 -08:00
Ian Lance Taylor 7854b0bc25 libbacktrace: check for objcopy --add-gnu-debuglink using --help 
* configure.ac: Check for objcopy --add-gnu-debuglink by using
	objcopy --help.
	* configure: Regenerate
 2021-02-11 18:11:18 -08:00
Ian Lance Taylor dedbe13fda libbacktrace: don't fail tests if dwz fails 
* Makefile.am (%_dwz): If dwz fails, use uncompressed debug info.
	* Makefile.in: Regenerate.
 2021-01-18 14:58:41 -08:00
Ian Lance Taylor 096650403a libbacktrace: use correct directory/filename for DWARF 5 
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.
 2021-01-18 14:57:11 -08:00
Ian Lance Taylor 1da441c1b0 libbacktrace: correct buffer overflow tests 
* dwarf.c (resolve_string): Use > rather than >= to check whether
	string index extends past buffer.
	(resolve_addr_index): Similarly for address index.
 2020-12-04 11:19:55 -08:00
Ian Lance Taylor f24e9f401f libbacktrace: update README 2020-10-26 13:45:23 -07:00
Ian Lance Taylor 73eb1803b1 libbacktrace: use __attribute__((__fallthrough__)) 
Use an attribute rather than a comment when falling through a switch case.

	* internal.h (ATTRIBUTE_FALLTHROUGH): Define.
	* elf.c (elf_zlib_inflate): Use ATTRIBUTE_FALLTHROUGH.
 2020-10-20 11:50:23 -07:00
Ian Lance Taylor 5009c11398 libbacktrace: replace Tom Sawyer with Opticks 
The main source uses Opticks now.
 2020-09-30 20:08:56 -07:00
Ian Lance Taylor 3bd25ab355 libbacktrace/ChangeLog: 
PR libbacktrace/97082
        * Makefile.am (check_DATA): Add mtest.dSYM if USE_DSYMUTIL.
        * Makefile.in: Regenerate.
 2020-09-28 13:57:18 -07:00
Ian Lance Taylor 1286f69fde libbacktrace: only run dsymutil with Mach-O 
libbacktrace/ChangeLog:
	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.
 2020-09-28 13:50:34 -07:00
Ian Lance Taylor 95e8e96c86 libbacktrace: handle pc == low correctly 
* dwarf.c (report_inlined_functions): Handle PC == -1 and PC ==
	p->low.
	(dwarf_lookup_pc): Likewise.
 2020-09-27 17:30:21 -07:00
Ian Lance Taylor c8a81d4e3a libbacktrace: use ELF symbol table if no debug info available 
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.
 2020-09-27 17:29:53 -07:00
Ian Lance Taylor 77bcaa99f5 libbacktrace: support MiniDebugInfo 
libbacktrace/ChangeLog:
	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.

Close #38
 2020-09-27 17:28:39 -07:00
Ian Lance Taylor 2f5efbfa32 libbacktrace: don't strip leading underscore on 64-bit PE 
* pecoff.c (coff_initialize_syminfo): Add is_64 parameter.
	(coff_add): Determine and pass is_64.

Closes #28
 2020-09-27 17:19:28 -07:00
Ian Lance Taylor 4ae8d988a7 libbacktrace: fetch executable path on macOS 
PR libbacktrace/96973
	* fileline.c (macho_get_executable_path): New static function.
	(fileline_initialize): Call macho_get_executable_path.
 2020-09-27 17:18:38 -07:00
Ian Lance Taylor 430dc8b6fe libbacktrace: avoid ambiguous binary search 
Searching for a range match can cause the search order to not match
the sort order, which can cause libbacktrace to miss matching entries.
Allocate an extra entry at the end of function_addrs and unit_addrs vectors,
so that we can safely compare to the next entry when searching.
Adjust the matching code accordingly.

Fixes #44

	* 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.
 2020-09-27 17:17:59 -07:00
Ian Lance Taylor 5dec0fae31 libbacktrace: fix tipo in comment 
* simple.c (simple_unwind): Correct comment spelling.

Close #47
 2020-09-27 17:17:10 -07:00
Ian Lance Taylor 030bd0a709 libbacktrace: correct memory lengths in Mach-O dsym support 
* macho.c (macho_add_dsym): Make space for '/' in dsym.  Use
	correct length when freeing diralc.

Close #40
 2020-09-27 17:16:15 -07:00
Ian Lance Taylor b3b57f9ee0 libbacktrace: correctly swap Mach-O 32-bit file offset 
libbacktrace/ChangeLog:
	PR libbacktrace/96973
	* macho.c (macho_add_fat): Correctly swap 32-bit file offset.
 2020-09-27 17:15:03 -07:00
Ian Lance Taylor 886aef3783 libbacktrace: only match magic number at start of line 
libbacktrace/ChangeLog:
	PR libbacktrace/96971
	* filetype.awk: Only match magic number at start of line.
 2020-09-27 17:14:27 -07:00
Ian Lance Taylor 89b2b5066b libbacktrace: add Mach-O 64-bit FAT support 
libbacktrace/:
	* 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.
 2020-09-27 17:13:21 -07:00
Ian Lance Taylor aaa51b6dbe libbacktrace: test linker support for DWARF 5 
On AIX, the compiler supports DWARF 5 but the linker does not.

2020-07-07 Clement Chigot <clement.chigot@atos.net>

	* configure.ac: Test linker support for DWARF5
	* configure: Regenerate
 2020-09-27 17:12:15 -07:00
Ian Lance Taylor 9b7f216e86 libbacktrace: mark test_large parameter unused in ztest.c 2020-05-13 11:11:13 -07:00
Ian Lance Taylor d68a7ac6dd libbacktrace: treat EACCESS like ENOENT 
For https://gcc.gnu.org/PR95061
 2020-05-13 10:29:45 -07:00
Ian Lance Taylor 14465a9574 libbacktrace: declare getpagesize if necessary 
Fixes https://gcc.gnu.org/PR95012.
 2020-05-11 10:54:46 -07:00
Ian Lance Taylor 7206f5bd06 libbacktrace: don't crash if ELF file has no sections 
Patch from Roland McGrath.

Fixes #41
 2020-05-09 20:36:19 -07:00
Ian Lance Taylor ca0de0517f libbacktrace: don't free ELF strtab if error occurs after saving syminfo 
Fixes #29
 2020-02-19 10:32:09 -08:00
Ian Lance Taylor 4e548e735f libbacktrace: add preliminary Mach-O support 2020-02-18 18:57:14 -08:00
Ian Lance Taylor 929d6205cf libbacktrace: always pass -g when compiling test code 
This approach required adding a few casts to ztest.c, as it is now
compiled with -Wall.

Fixes GCC PR libbacktrace/90636
 2020-02-18 18:49:42 -08:00
Ian Lance Taylor bd02146d90 Update copyright years. 2020-02-18 18:46:13 -08:00
Ian Lance Taylor 75cac302a5 libbacktrace: update to current libgo test file 2020-02-15 18:26:32 -08:00
Ian Lance Taylor 4e14a008cd libbacktrace: support short read 
Fixes #32
 2020-02-15 18:14:20 -08:00
Ian Lance Taylor aced4e1f2a libbacktrace: if debug info large or split, read sections individually 
Fixes #29
 2020-02-15 17:58:09 -08:00
Ian Lance Taylor 0f06cda953 libbacktrace: support fetching executable name using sysctl 
This supports FreeBSD and NetBSD when /proc is not mounted.
 2020-02-15 15:33:11 -08:00
Ian Lance Taylor 559ab7cab4 libbacktrace: update to current version from GCC trunk 
This adds DWARF 5 support as well as an enhanced testsuite.

Patch assembled by Than McIntosh.
 2019-12-23 18:55:51 -08:00
Ian Lance Taylor 5a99ff7fed config.guess, config.sub: update to latest versions 
Update to config.guess 2018-05-19 and config.sub 2018-05-24 from
git://git.savannah.gnu.org/config.git revision
3a2a927f547ee478147008c3fda2adb8a2b2ebc4.

This brings in musl support.
 2018-06-05 08:00:51 -07:00
Ian Lance Taylor 22508c46b3 config.guess, config.sub: update to current GCC versions 
Copied from GCC revision 256122.
 2018-06-05 07:37:14 -07:00