[llvm-bugs] [Bug 52442] New: Wasm .debug_aranges should not contain both code and data addresses

via llvm-bugs llvm-bugs at lists.llvm.org
Mon Nov 8 16:13:09 PST 2021


            Bug ID: 52442
           Summary: Wasm .debug_aranges should not contain both code and
                    data addresses
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: other
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: WebAssembly
          Assignee: unassignedbugs at nondot.org
          Reporter: aardappel at gmail.com
                CC: llvm-bugs at lists.llvm.org

Follow-up from: https://bugs.llvm.org/show_bug.cgi?id=52376

As can be seen in the test code fixed in https://reviews.llvm.org/D113438 we
are emitting aranges for 2 separate "address spaces": data in linear memory,
and code as code section offsets. These could overlap and thus not make sense.

Since aranges does not accomodate for the concept of address spaces, the
easiest solution may be to only emit code offsets to aranges.

Aranges are being collected thru addArangeLabel in DwarfCompileUnit.cpp, and
thus some Wasm specific code filtering out data symbols may be required there?

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