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.

1 files changed, 53 insertions, 2 deletions

diff --git a/libbacktrace/Makefile.am b/libbacktrace/Makefile.am
index 6fc07498787..4d349386c9b 100644
--- a/libbacktrace/Makefile.am
+++ b/libbacktrace/Makefile.am
@@ -478,13 +478,61 @@ endif HAVE_DSYMUTIL
 
 endif
 
+mtest_SOURCES = mtest.c testlib.c
+mtest_CFLAGS = $(libbacktrace_TEST_CFLAGS) -O
+mtest_LDADD = libbacktrace.la
+
+BUILDTESTS += mtest
+
+if HAVE_MINIDEBUG
+
+TESTS += mtest_minidebug
+
+%_minidebug: %
+	$(NM) -D $< -P --defined-only | $(AWK) '{ print $$1 }' | sort > $<.dsyms
+	$(NM) $< -P --defined-only | $(AWK) '{ if ($$2 == "T" || $$2 == "t" || $$2 == "D") print $$1 }' | sort > $<.fsyms
+	$(COMM) -13 $<.dsyms $<.fsyms > $<.keepsyms
+	$(OBJCOPY) --only-keep-debug $< $<.dbg
+	$(OBJCOPY) -S --remove-section .gdb_index --remove-section .comment --keep-symbols=$<.keepsyms $<.dbg $<.mdbg
+	$(OBJCOPY) --strip-all --remove-section ..comment $< $<.strip
+	rm -f $<.mdbg.xz
+	$(XZ) $<.mdbg
+	$(OBJCOPY) --add-section .gnu_debugdata=$<.mdbg.xz $<.strip
+	mv $<.strip $@
+
+endif HAVE_MINIDEBUG
+
 endif NATIVE
 
+if HAVE_ELF
+
+xztest_SOURCES = xztest.c testlib.c
+xztest_CFLAGS = $(libbacktrace_TEST_CFLAGS) -DSRCDIR=\"$(srcdir)\"
+xztest_LDADD = libbacktrace.la
+
+xztest_alloc_SOURCES = $(xztest_SOURCES)
+xztest_alloc_CFLAGS = $(xztest_CFLAGS)
+xztest_alloc_LDADD = libbacktrace_alloc.la
+
+if HAVE_LIBLZMA
+xztest_LDADD += -llzma
+xztest_alloc_LDADD += -llzma
+endif
+
+xztest_LDADD += $(CLOCK_GETTIME_LINK)
+xztest_alloc_LDADD += $(CLOCK_GETTIME_LINK)
+
+BUILDTESTS += xztest xztest_alloc
+
+endif HAVE_ELF
+
 check_PROGRAMS += $(BUILDTESTS)
 
 TESTS += $(BUILDTESTS)
 
-CLEANFILES = $(TESTS) *.debug elf_for_test.c edtest2_build.c gen_edtest2_build
+CLEANFILES = \
+	$(TESTS) *.debug elf_for_test.c edtest2_build.c gen_edtest2_build \
+	*.dsyms *.fsyms *.keepsyms *.dbg *.mdbg *.mdbg.xz *.strip
 
 clean-local:
 	-rm -rf usr
@@ -504,7 +552,7 @@ clean-local:
 INCDIR = $(top_srcdir)/../include
 alloc.lo: config.h backtrace.h internal.h
 backtrace.lo: config.h backtrace.h internal.h
-btest.lo: (INCDIR)/filenames.h backtrace.h backtrace-supported.h
+btest.lo: $(INCDIR)/filenames.h backtrace.h backtrace-supported.h
 dwarf.lo: config.h $(INCDIR)/dwarf2.h $(INCDIR)/dwarf2.def \
 	$(INCDIR)/filenames.h backtrace.h internal.h
 elf.lo: config.h backtrace.h internal.h
@@ -512,6 +560,7 @@ fileline.lo: config.h backtrace.h internal.h
 macho.lo: config.h backtrace.h internal.h
 mmap.lo: config.h backtrace.h internal.h
 mmapio.lo: config.h backtrace.h internal.h
+mtest.lo: backtrace.h backtrace-supported.h
 nounwind.lo: config.h internal.h
 pecoff.lo: config.h backtrace.h internal.h
 posix.lo: config.h backtrace.h internal.h
@@ -523,5 +572,7 @@ stest.lo: config.h backtrace.h internal.h
 state.lo: config.h backtrace.h backtrace-supported.h internal.h
 unknown.lo: config.h backtrace.h internal.h
 xcoff.lo: config.h backtrace.h internal.h
+xztest.lo: config.h backtrace.h backtrace-supported.h internal.h testlib.h
+ztest.lo: config.h backtrace.h backtrace-supported.h internal.h testlib.h
 
 include $(top_srcdir)/../multilib.am