[LLVMbugs] [Bug 14728] New: debug info doesn't describe TLS variables correctly

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Thu Dec 27 19:42:35 PST 2012


             Bug #: 14728
           Summary: debug info doesn't describe TLS variables correctly
           Product: clang
           Version: unspecified
          Platform: PC
        OS/Version: All
            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

Failures found in the GDB 7.5 test suite (gdb.threads/tls.exp) demonstrate that
Clang/LLVM don't support various debug info related to TLS variables.

I haven't investigated this further as Eric mentioned this is a completely
unimplemented/uninvestigated, not just a minor bug. I'll leave further
investigation to a time when we sit down to actually implement this.

Some of the observed problems include:

* GDB cannot print the value of a TLS variable
* GDB incorrectly describes a TLS variable as static instead of thread local

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