dwarf: Update to 20190529.

thirdparty/dwarf/CMakeLists.txt

@@ -2,31 +2,29 @@ set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-pointer-to-int-cast -Wno-int-to-pointe
 
 add_library (dwarf STATIC
  dwarf_abbrev.c
- dwarf_addr_finder.c
  dwarf_alloc.c
  dwarf_arange.c
  dwarf_die_deliv.c
+ dwarf_dsc.c
+ dwarf_dnames.c
  dwarf_error.c
  dwarf_form.c
  dwarf_frame.c
  dwarf_frame2.c
- dwarf_frame3.c
  dwarf_funcs.c
  dwarf_global.c
+ dwarf_groups.c
  dwarf_harmless.c
  dwarf_init_finish.c
  dwarf_leb.c
  dwarf_line.c
- dwarf_line2.c
  dwarf_loc.c
- #dwarf_loc2.c
  dwarf_macro.c
  dwarf_macro5.c
  dwarf_print_lines.c
  dwarf_pubtypes.c
  dwarf_query.c
  dwarf_ranges.c
- dwarf_sort_line.c
  dwarf_string.c
  dwarf_stubs.c
  dwarf_tied.c

thirdparty/dwarf/NEWS

@@ -1,3 +1,74 @@
+January 15, 2019
+ All references to C data types spelled *int16* *int32* or
+ *int64* have been removed. Dwarf_Unsigned is used instead.
+ This simplifies builds in certain environments.
+December 05, 2018
+ Many new producer functions provided. Now no matter
+ what producer task is to be done there is a version
+ that returns DW_DLV_OK/DW_DLV_ERROR and no ugly
+ casting of return values is needed to check for success/failure.
+ All the old interfaces continue to work.
+ One can switch from
+ Dwarf_P_Attribute dwarf_add_AT_name(Dwarf_P_Die die,
+ char* name,
+ Dwarf_Error* error);
+ (requires a cast to check return code DW_DLV_BADADDR)
+ to
+ int dwarf_add_AT_comp_dir_a(Dwarf_P_Die ownerdie,
+ char* current_working_directory,
+ Dwarf_P_Attribute * outattr,
+ Dwarf_Error* error);
+ (no cast,type safe)
+ for example.
+ The libdwarf2p.1.mm document table-of-contents
+ lists only the latest functions, but all the documentation
+ of all the earlier versions remain in the document as
+ subsections.
+October 24, 2018
+ Now supports reading MacOS dSYM object files. 
+May 17, 2017
+ Now supports some COMDAT groups as well as split-dwarf.
+ Some new functions added so consumer code can know
+ what the sections and groups contain.
+ Some compilers emit groups findable only with relocation
+ data: libdwarf does not understand those groups.
+April 02, 2017
+ The consumer code now reads DWARF5 split-dwarf sections.
+ The functions dwarf_init_b() and dwarf_elf_init_b()
+ and dwarf_object_init_b() have a groupnumber argument
+ added. For non-split-dwarf objects the original
+ dwarf_init() and dwarf_elf_init() and 
+ dwarf_object_init() functions continue to work properly.
+September 11, 2016
+ The producer code is getting a new batch of functions.
+
+ For each existing producer call returning
+ a value other than DW_DLV_OK/DW_DLV_ERROR/DW_DLV_NO_ENTRY
+ a new function returning one of those three codes with
+ a pointer argument added to return the actual desired
+ value (that used to be the 'return').
+ The existing calls require the caller to do ugly casting
+ to determine whether the call did its work or got an error.
+ The new calls have type-safe interfaces that separate
+ the desired result from the error-indication.
+ So producer calls look more like consumer calls.
+
+ The existing historical producer interfaces will remain 
+ unchanged and will continue to be supported. The
+ existing interfaces will simply call the new interfaces
+ so there is no code duplication: Old and new use the same
+ implementation.
+
+ Source and binary compatibility is retained, but
+ users of the producer code can, when they wish, 
+ partially or fully convert to the new interfaces.
+
+ This work will be ongoing and gradual, not 'all at once'.
+
+August 27, 2016
+ Now the producer is capable of producing .debug_str strings.
+ Strings are never duplicated in .debug_str.
+ See dwarf_pro_set_default_string_form() in libdwarf2p.1.pdf
 May 23, 2016
  When building a shared-library the soname is set
  in the dynamic section "libdwarf.so.1".

thirdparty/dwarf/README

@@ -8,6 +8,16 @@ To build both, type
  ./configure --enable-shared 
  make
 
+April 16, 2017: Some people have had build problems, getting
+errors like:
+"dwarf_elf_access.c:238:21: warning: assignment makes 
+pointer from integer without a cast [enabled by default]
+ if ((ehdr_ident = elf_getident(elf, NULL)) == NULL) {"
+That suggests that the libelf headers needed are missing.
+On Ubuntu the command 'sudo apt-get install libelf-dev'
+should solve this problem.
+
+
 January 30, 2013: libdwarf.h is no longer in the distribution,
 but libdwarf.h.in is identical to libdwarf.h. 'configure'
 copies libdwarf.h.in to libdwarf.h and whether libelf.h defines