[Bug libbacktrace/93608] [libbacktrace] Add support for .gnu_debugdata section (aka MiniDebugInfo)

[Bug libbacktrace/93608] [libbacktrace] Add support for .gnu_debugdata section (aka MiniDebugInfo)

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93608

--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Ian Lance Taylor <ian@gcc.gnu.org>:

https://gcc.gnu.org/g:05f40bc4c116ba48843728201bc7290a5e518598

commit r11-3196-g05f40bc4c116ba48843728201bc7290a5e518598
Author: Ian Lance Taylor <iant@golang.org>
Date:   Mon Sep 14 14:01:56 2020 -0700

    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.

[Bug libbacktrace/93608] [libbacktrace] Add support for .gnu_debugdata section (aka MiniDebugInfo)

[ian at airs dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93608

Ian Lance Taylor <ian at airs dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #5 from Ian Lance Taylor <ian at airs dot com> ---
This now works.