[LLVMbugs] [Bug 14658] New: debug info DW_AT_comp_dir is not the same path as that used to resolve file names

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=14658

             Bug #: 14658
           Summary: debug info DW_AT_comp_dir is not the same path as that
                    used to resolve file names
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Keywords: googler
          Severity: enhancement
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: dblaikie at gmail.com
                CC: dgregor at apple.com, echristo at gmail.com,
                    llvmbugs at cs.uiuc.edu
            Blocks: 14330
    Classification: Unclassified


gdb.base/fullname.exp is failing due to a gap between the DW_AT_comp_dir and
the DW_AT_name of the compile_unit. The latter is not a path relative to the
former.

I believe this is reproduced outside the test suite by doing something like
this:

PWD=/foo/bar clang baz.cpp

the DW_AT_name will be baz.cpp, resolved relative to the actual current working
directory of clang, not the PWD variable.
the value of DW_AT_comp_dir will be the value of $PWD

Thus the debugger cannot find the file because baz.cpp is in the real current
working directory, not /foo/bar.

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