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 098E63858003; Mon, 13 Sep 2021 10:20:02 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 098E63858003
From: "913495245 at qq dot com" <sourceware-bugzilla@sourceware.org>
To: systemtap@sourceware.org
Subject: [Bug translator/28334] New: cannot handle offset into register
Date: Mon, 13 Sep 2021 10:20:01 +0000
X-Bugzilla-Reason: AssignedTo
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: systemtap
X-Bugzilla-Component: translator
X-Bugzilla-Version: unspecified
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: critical
X-Bugzilla-Who: 913495245 at qq dot com
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: systemtap 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-28334-6586@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: systemtap@sourceware.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Systemtap mailing list <systemtap.sourceware.org>
List-Unsubscribe: <https://sourceware.org/mailman/options/systemtap>,
 <mailto:systemtap-request@sourceware.org?subject=unsubscribe>
List-Archive: <https://sourceware.org/pipermail/systemtap/>
List-Help: <mailto:systemtap-request@sourceware.org?subject=help>
List-Subscribe: <https://sourceware.org/mailman/listinfo/systemtap>,
 <mailto:systemtap-request@sourceware.org?subject=subscribe>
X-List-Received-Date: Mon, 13 Sep 2021 10:20:02 -0000

https://sourceware.org/bugzilla/show_bug.cgi?id=3D28334

            Bug ID: 28334
           Summary: cannot handle offset into register
           Product: systemtap
           Version: unspecified
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: translator
          Assignee: systemtap at sourceware dot org
          Reporter: 913495245 at qq dot com
  Target Milestone: ---

Hi team

I had a function trace demo with Struct parameter and Struct return, but got
the "cannot handle offset into register" error.

my environments:
  os: Ubuntu 16.04 LTS
  gcc 8.3
  systemtap 4.5
  elfutils 0.185


# func.h
struct DataPackage {
    int len;
    float width;
    // float width2; // uncomment this line will work :)
    double angle;
};

struct DataPackage func_complex_v2(struct DataPackage input_data, int page);

# func.c

struct DataPackage func_complex_v2(struct DataPackage input_data, int page)=
 {
    struct DataPackage d;
    d.len =3D 19;
    d.width =3D 115.33;
    d.angle =3D 6.66;

    return d;
}

# main.c
int main(int argc, char const *argv[])
{

    struct DataPackage d;
    d.len =3D 997;
    d.width =3D 10;
    d.angle =3D 0.777;

    struct DataPackage r =3Dfunc_complex_v2(d, 789);

    return 0;
}

# cc_stap_test_complex.stp
probe
process("/home/xyz/vs_workspace/CacheLab/build/test").function("func_comple=
x_v2").return
{
    printf("func_complex_v2 return: %s\n", fp_to_string($return->width, 6))
}


Here is the console output:

Debug translate_offsetsemantic error: cannot handle offset into register:
identifier '$return' at=20
/home/xyz/cc_stap_test_complex.stp:73:57
        source:     printf("func_complex_v2 return: %s\n",
fp_to_string($return->width, 6))
                                                                        ^

semantic error: unresolved type : identifier '$return' at :73:57
        source:     printf("func_complex_v2 return: %s\n",
fp_to_string($return->width, 6))


Any advice is appreciate, thanks!

--=20
You are receiving this mail because:
You are the assignee for the bug.=