From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <sourceware-bugzilla@sourceware.org>
Received: by sourceware.org (Postfix, from userid 48)
 id 98CFE383F851; Thu,  7 May 2020 07:10:43 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 98CFE383F851
From: "andre.poenitz at qt dot io" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug python/25936] New: Sizeof value for arrays reported wrongly as
 zero
Date: Thu, 07 May 2020 07:10:43 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gdb
X-Bugzilla-Component: python
X-Bugzilla-Version: 9.1
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: andre.poenitz at qt dot io
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: unassigned at sourceware dot org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status
 bug_severity priority component assigned_to reporter target_milestone
Message-ID: <bug-25936-4717@http.sourceware.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://sourceware.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-BeenThere: gdb-prs@sourceware.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gdb-prs mailing list <gdb-prs.sourceware.org>
List-Unsubscribe: <http://sourceware.org/mailman/options/gdb-prs>,
 <mailto:gdb-prs-request@sourceware.org?subject=unsubscribe>
List-Archive: <https://sourceware.org/pipermail/gdb-prs/>
List-Help: <mailto:gdb-prs-request@sourceware.org?subject=help>
List-Subscribe: <http://sourceware.org/mailman/listinfo/gdb-prs>,
 <mailto:gdb-prs-request@sourceware.org?subject=subscribe>
X-List-Received-Date: Thu, 07 May 2020 07:10:43 -0000

https://sourceware.org/bugzilla/show_bug.cgi?id=3D25936

            Bug ID: 25936
           Summary: Sizeof value for arrays reported wrongly as zero
           Product: gdb
           Version: 9.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: python
          Assignee: unassigned at sourceware dot org
          Reporter: andre.poenitz at qt dot io
  Target Milestone: ---

In the code below, the array data member reported to have a size zero.

The behavior depends on the actual types in the array, std::fstream and
std::strings are only examples, possibly it works for types that are comple=
tely
inlined.



#include <fstream>
#include <string>

struct S
{
    std::fstream items[5];  // Does not work. Same for QObject, ...
    // std::string items[5];  // Works. Same for int, ...
};

int main()
{
    S s;

    // Break here.
    // py print(gdb.parse_and_eval('s').type.sizeof) yields 2640       // G=
ood
    // py print(gdb.parse_and_eval('s.items').type.sizeof)  yields 0   // B=
ad
    // py print(gdb.parse_and_eval('s').type.fields()[0].type.sizeof)  yiel=
ds 0
// Bad
    return s.items[0].is_open();
//    return int(s.items[0].size());
}

--=20
You are receiving this mail because:
You are on the CC list for the bug.=