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e17dca21a1
as helgrind died many years ago, but resuscitate since then. git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14557
46 lines
1.5 KiB
Plaintext
46 lines
1.5 KiB
Plaintext
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On 4 Apr 06, the debuginfo reader (m_debuginfo) was majorly cleaned up
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and restructured. It has been a bit of a tangle for a while. On 18 Sep 14
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the STABS support was completely removed. The new structure looks like this:
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debuginfo.c
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readelf.c
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readdwarf.c
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storage.c
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Each .c can only call those below it on the page.
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storage.c contains the SegInfo structure and stuff for
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maintaining/searching arrays of symbols, line-numbers, and Dwarf CF
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info records.
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readdwarf.c parses the relevant kind of info and call storage.c to
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store the results.
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readelf.c reads ELF format, hands syms directly to storage.c,
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then delegates to readdwarf.c for debug info. All straightforward.
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debuginfo.c is the top-level file, and is quite small.
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There are 2 goals to this:
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(1) Generally tidy up something which needs tidying up
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(2) Introduce more modularity, so as to make it easier to add
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readers for other formats, if needed
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Rationale for (1) and (2) are obvious.
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Originally there was also goal (3) Simplify the stabs reader.
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But stabs support was broken since 3.9.0 and completely removed in 3.10.0.
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The worst thing is that it is the stabs type reader that was crashing,
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not the stabs line-number reader.
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Old versions of the stabs type reader can be found in the subversion repository
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as m_debuginfo/UNUSED_STABS.txt, the stabs line-number reader was in
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m_debuginfo/readstabs.c. The old version of this file explained more
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about the setup.
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