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Re: Variable tracking (location lists support) - part 2
- From: Roger Sayle <roger at eyesopen dot com>
- To: Josef Zlomek <zlomj9am at artax dot karlin dot mff dot cuni dot cz>
- Cc: Daniel Berlin <dberlin at dberlin dot org>, <gcc-patches at gcc dot gnu dot org>
- Date: Sun, 8 Feb 2004 14:23:47 -0700 (MST)
- Subject: Re: Variable tracking (location lists support) - part 2
Hi Josef and Dan,
I've just discovered that typing "gdb cc1" on i686-pc-linux-gnu with
a recently built mainline GCC, causes both gdb 6.0 and gdb 5.2.1 to
segmentation fault. Given that 6.0 is the most recent release of GDB,
I suspect that either there's a bug in gcc's location list generation
or that GDB's dwarf-2 location list code isn't as backwardly "safe"
as we'd hoped.
The segfault in gdb 6.0 is in decode_locdesc of dwarf2read.c line 6771,
where the value of the "blk" pointer looks invalid.
I'm looking into the issue as best I can (without a debugger :<), but
I wonder if I could also ask you to investigate? As a worst case
scenario, we might consider a patch to disable location lists by
default, until this failure is resolved?
Many thanks in advance,