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From: "msebor at gmail dot com" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug c++/28901] New: unable to resolve function overloads involving
 inheritance
Date: Wed, 16 Feb 2022 23:56:06 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D28901

            Bug ID: 28901
           Summary: unable to resolve function overloads involving
                    inheritance
           Product: gdb
           Version: 11.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
          Assignee: unassigned at sourceware dot org
          Reporter: msebor at gmail dot com
  Target Milestone: ---

The following test case shows that GDB 11.1 is unable to perform basic over=
load
resolution involving derivation.  This limitation prevents, for example,
calling output functions when debugging LLVM.  The LLVM debugger, lldb, han=
dles
this without a problem.

I'm using GNU gdb (GDB) Fedora 11.1-5.fc35.

$ cat t.C && g++ -g3 t.C && gdb -batch -nx -ex "break main" -ex run -ex "pr=
int
f (x, b)" a.out=20
struct A { };
struct B: A { };

struct X { };
struct Z { };

void f (X&, A&) { }
void f (Z&, B&) { }

B b;
X x;

int main ()
{
  f (x, b);
}

Breakpoint 1 at 0x401128: file t.C, line 15.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".

Breakpoint 1, main () at t.C:15
15        f (x, b);
Cannot resolve function f to any overloaded instance

--=20
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