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0b9b49cf4a2c9229fc052d6716e1528b2f23e91a
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46 Commits
Author SHA1 Message Date
Ian Lance Taylor 0b9b49cf4a libbacktrace: make backtrace_syminfo_to_full_callback_moredata static 
* elf.c (backtrace_syminfo_to_full_callback_moredata): Move to
	elf.c from fileline.c and make static.
	* fileline.c (backtrace_syminfo_to_full_callback_moredata):
	Moved to elf.c.
	* internal.h (backtrace_syminfo_to_full_callback_moredata): Don't
	declare.
 2026-09-03 12:30:32 -07:00
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 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
Dhruv Chawla 9477521bc1 libbacktrace: Fix typos in various files 
Signed-off-by: Dhruv Chawla <dhruvc@nvidia.com>

libbacktrace/ChangeLog:

	* allocfail.sh: Fix typos.
	* elf.c (elf_fetch_bits): Likewise.
 2026-06-01 21:36:45 -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
Jakub Jelinek 42962d2cfb Update copyright years. 2026-05-03 18:21:13 -07:00
Jakub Jelinek bdd324c192 Update copyright years. 2026-05-03 18:20:27 -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 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 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 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
Martin Liska 5aa92540f0 libbacktrace: fix UBSAN issues 
Fix issues mentioned in the PR.

	PR libbacktrace/103167

libbacktrace/ChangeLog:

	* elf.c (elf_uncompress_lzma_block): Cast to unsigned int.
	(elf_uncompress_lzma): Likewise.
	* xztest.c (test_samples): memcpy only if v > 0.
 2024-07-11 18:40:13 -07:00
Ian Lance Taylor 8c05bcb94f libbacktrace: update copyright years 2024-07-11 18:14:01 -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 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 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 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 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 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 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
Jakub Jelinek 5496ee0a1a Update copyright years. 2021-01-18 14:56:19 -08:00
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 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 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 bd02146d90 Update copyright years. 2020-02-18 18:46:13 -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 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 012b950b37 Copy changes from GCC: 
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.

2018-02-15  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.

2018-01-19  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.

Fixes #13
 2018-04-17 07:04:02 -07:00
Ian Lance Taylor 177940370e * elf.c (elf_add): Close descriptor if we use a debugfile. 
* btest.c (check_open_files): New static function.
	(main): Call check_open_files.
 2018-01-31 15:24:01 -08:00
Ian Lance Taylor 811741b03b * 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 10:14:34 -08:00
Ian Lance Taylor f2c17c0417 libbacktrace: update to GCC SVN revision 256776 
This brings in this patch:

	* 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.
 2018-01-16 17:39:45 -08:00
Than McIntosh 17f687d2b9 Update from gcc trunk version of libbacktrace at svn rev 256427. (#8) 
Includes (among other things) support for compressed debug sections,
a variety of bugfixes, and expanded test coverage.
 2018-01-12 10:26:02 -08:00
Ian Lance Taylor ba79a27ee9 all: remove meaningless trailing whitespace 2016-09-11 06:45:37 -07:00
Ian Lance Taylor 84241313f2 libbacktrace: initial commit 
This is a standalone version of the libbacktrace library that I
originally wrote for GCC.  This is a copy of libbacktrace from GCC
trunk, with all dependencies incorporated here.
 2016-09-10 07:59:09 -07:00