[llvm-bugs] [Bug 43245] New: llvm-readelf --stack-sizes does not report all functions that share code

via llvm-bugs llvm-bugs at lists.llvm.org
Fri Sep 6 13:45:00 PDT 2019


            Bug ID: 43245
           Summary: llvm-readelf --stack-sizes does not report all
                    functions that share code
           Product: tools
           Version: trunk
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: llvm-readobj
          Assignee: unassignedbugs at nondot.org
          Reporter: Wolfgang_Pieb at playstation.sony.com
                CC: jh7370.2008 at my.bristol.ac.uk, llvm-bugs at lists.llvm.org

// Given the following C source:

static void bash ()

static void bash1 ()

int main ()
   bash ();
   bash1 ();
   return 0;
// ==== end ====

When compiled with --function-sections -fstack-size-section and linked with lld
--gc-sections -icf=all, bash() and bash1() are physically represented by the
same code and the symbols for both functions have the same value.

llvm-readelf --stack-sizes, when invoked on the executable, displays only the
stack size for one of the functions.

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