[RFA] patch for DW_AT_comp_dir/DW_AT_name vs .debug_line inconsistencies

["Doug Evans" <dje at google dot com>]

Ref: http://sourceware.org/ml/gdb/2008-01/msg00007.html

[Also ref: http://sourceware.org/ml/gdb-patches/2007-11/msg00314.html
but I'm agnostic as to whether gdb should handle #line like this.  The
testcases in this patch use #line for convenience only.]

How about this?
Aleksandar, does this work for you? [you'll need to still account for
IS_ABSOLUTE_PATH issues I suspect]

This patch has dwarf_decode_lines prescan the .debug_line info for
files that match DW_AT_name of the main source file, and passes that
to start_subfile instead of what's recorded in .debug_line.  This lets
start_subfile get a match with the initial subfile created by
start_symtab.

I took an easy out in scanning for a match, I just pick the first.  I
can add the requisite code if folks think this is the way to go.

No regressions in the testsuite (i686-linux).

Attachment: gdb-080105-dwarf-decode-lines-1.patch
Description: Binary data