1 2On 4 Apr 06, the debuginfo reader (m_debuginfo) was majorly cleaned up 3and restructured. It has been a bit of a tangle for a while. On 18 Sep 14 4the STABS support was completely removed. The new structure looks like this: 5 6 debuginfo.c 7 8 readelf.c 9 10 readdwarf.c 11 12 storage.c 13 14Each .c can only call those below it on the page. 15 16storage.c contains the SegInfo structure and stuff for 17maintaining/searching arrays of symbols, line-numbers, and Dwarf CF 18info records. 19 20readdwarf.c parses the relevant kind of info and call storage.c to 21store the results. 22 23readelf.c reads ELF format, hands syms directly to storage.c, 24then delegates to readdwarf.c for debug info. All straightforward. 25 26debuginfo.c is the top-level file, and is quite small. 27 28There are 2 goals to this: 29 30(1) Generally tidy up something which needs tidying up 31 32(2) Introduce more modularity, so as to make it easier to add 33 readers for other formats, if needed 34 35Rationale for (1) and (2) are obvious. 36 37Originally there was also goal (3) Simplify the stabs reader. 38But stabs support was broken since 3.9.0 and completely removed in 3.10.0. 39 40The worst thing is that it is the stabs type reader that was crashing, 41not the stabs line-number reader. 42Old versions of the stabs type reader can be found in the subversion repository 43as m_debuginfo/UNUSED_STABS.txt, the stabs line-number reader was in 44m_debuginfo/readstabs.c. The old version of this file explained more 45about the setup. 46