[llvm-bugs] [Bug 39997] New: llvm-nm prints 0 for symbol sizes for format=posix output

via llvm-bugs llvm-bugs at lists.llvm.org
Thu Dec 13 06:18:41 PST 2018


https://bugs.llvm.org/show_bug.cgi?id=39997

            Bug ID: 39997
           Summary: llvm-nm prints 0 for symbol sizes for format=posix
                    output
           Product: tools
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: llvm-nm
          Assignee: unassignedbugs at nondot.org
          Reporter: jh7370.2008 at my.bristol.ac.uk
                CC: llvm-bugs at lists.llvm.org

When using --format=posix, llvm-nm prints a column for the sizes, but unless
--print-size is used, the column is all zeroes:

GNU:
C:\Work\TempWork> nm bar.o --format=posix
bar B 0000000000000000 0000000000000004
main T 0000000000000000 0000000000000014

LLVM:
C:\Work\TempWork> llvm-nm bar.o --format=posix
bar B 0 0
main T 0 0

LLVM with print-size:
C:\Work\TempWork> llvm-nm bar.o --format=posix --print-size
bar B 0 4
main T 0 14

Input source:
int bar;

int main(){
    return bar;
}

This is obviously wrong. We should print the correct size with or without
print-size with this format (print-size should be a no-op when format=posix is
used).

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