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From: "dermojo at gmail dot com" <sourceware-bugzilla@sourceware.org>
To: libabigail@sourceware.org
Subject: [Bug default/29733] New: Comparing 2.0 dump to 2.1 dump: parameter 1
 of type 'int' was added to destructor
Date: Mon, 31 Oct 2022 08:41:31 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D29733

            Bug ID: 29733
           Summary: Comparing 2.0 dump to 2.1 dump: parameter 1 of type
                    'int' was added to destructor
           Product: libabigail
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: default
          Assignee: dodji at redhat dot com
          Reporter: dermojo at gmail dot com
                CC: libabigail at sourceware dot org
  Target Milestone: ---

Created attachment 14423
  --> https://sourceware.org/bugzilla/attachment.cgi?id=3D14423&action=3Ded=
it
sample library code

Hi,

I'm storing ABI dumps together with my shared library (C++) to check for ABI
breaks when rebuilding. I found an incompatibility when upgrading libabigail
and its tools from 2.0 to 2.1:

The exact same code yields different ABI dumps between both versions, and
abidiff reports incompatible changes, For example, the attached sample shows
this (compiled with "g++ -shared -o libsample.so sample.cpp -Wall -std=3Dc+=
+11 -g
-ggdb"):

> $ ~/git/libabigail-2.1/build/tools/abidiff abi-2.0.dump abi-2.1.dump
> Functions changes summary: 0 Removed, 1 Changed, 0 Added function
> Variables changes summary: 0 Removed, 0 Changed, 0 Added variable
>=20
> 1 function with some indirect sub-type change:
>=20
>   [C] 'method Sample::~Sample()' at sample.cpp:2:1 has some indirect sub-=
type changes:
>     parameter 1 of type 'int' was added
>=20
> (exit code: 4)

Comparing the ABI dumps between version 2.0 and 2.1, I can see that the 2.0
dump only contains 1 destructor as member function (_ZN6SampleD2Ev), while =
the
2. dump contains an additional _ZN6SampleD4Ev and both have the additional
"int" parameter.

The library symbol table doesn't contain _ZN6SampleD4Ev, only the debug info
does, and AFAIS only the D4 destructor has the additional int parameter.

Any help to resolve this is highly appreitated.

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