Public bug reported:
Ltrace in Ubuntu 18 prints meaningless value of first operand (nmemb) of
calloc call:
yugr@yugr-VirtualBox:~$ ltrace -e calloc ls
libc.so.6->calloc(140737455811080, 64)
= 0x7ffffe0f6a0d
I would expect a much smaller value and indeed gdb reports completely
different numbers:
yugr@yugr-VirtualBox:~$ gdb ls
GNU gdb (Ubuntu 8.1-0ubuntu3) 8.1.0.20180409-git
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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and "show warranty" for details.
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Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
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For help, type "help".
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Reading symbols from ls...(no debugging symbols found)...done.
(gdb) b calloc
Breakpoint 1 at 0x3b00
(gdb) r
Starting program: /bin/ls
Breakpoint 1, calloc (nmemb=nmemb@entry=1425, size=size@entry=1) at
dl-minimal.c:92
92 dl-minimal.c: No such file or directory.
(gdb) c
Continuing.
Breakpoint 1, calloc (nmemb=nmemb@entry=1169, size=size@entry=1) at
dl-minimal.c:92
92 in dl-minimal.c
(gdb)
Continuing.
Breakpoint 1, calloc (nmemb=nmemb@entry=1184, size=size@entry=1) at
dl-minimal.c:92
92 in dl-minimal.c
(gdb)
Continuing.
Breakpoint 1, calloc (nmemb=nmemb@entry=1178, size=size@entry=1) at
dl-minimal.c:92
92 in dl-minimal.c
(gdb)
Continuing.
Breakpoint 1, calloc (nmemb=nmemb@entry=1181, size=size@entry=1) at
dl-minimal.c:92
92 in dl-minimal.c
(gdb)
Continuing.
Breakpoint 1, calloc (nmemb=nmemb@entry=1179, size=size@entry=1) at
dl-minimal.c:92
92 in dl-minimal.c
(gdb)
Continuing.
Breakpoint 1, calloc (nmemb=nmemb@entry=1184, size=size@entry=1) at
dl-minimal.c:92
92 in dl-minimal.c
(gdb)
Continuing.
Breakpoint 1, calloc (nmemb=nmemb@entry=8, size=size@entry=24) at
dl-minimal.c:92
92 in dl-minimal.c
(gdb)
Continuing.
Breakpoint 1, calloc (nmemb=nmemb@entry=3, size=size@entry=24) at
dl-minimal.c:92
92 in dl-minimal.c
(gdb)
Continuing.
Breakpoint 1, calloc (nmemb=nmemb@entry=11, size=size@entry=24) at
dl-minimal.c:92
92 in dl-minimal.c
(gdb)
Continuing.
Breakpoint 1, calloc (nmemb=nmemb@entry=32, size=size@entry=24) at
dl-minimal.c:92
92 in dl-minimal.c
(gdb)
Continuing.
Breakpoint 1, calloc (nmemb=nmemb@entry=8, size=size@entry=24) at
dl-minimal.c:92
92 in dl-minimal.c
(gdb)
Continuing.
Breakpoint 1, calloc (nmemb=nmemb@entry=10, size=size@entry=24) at
dl-minimal.c:92
92 in dl-minimal.c
(gdb)
Continuing.
Breakpoint 1, calloc (nmemb=nmemb@entry=6, size=size@entry=24) at
dl-minimal.c:92
92 in dl-minimal.c
(gdb)
Continuing.
Breakpoint 1, calloc (nmemb=nmemb@entry=19, size=size@entry=24) at
dl-minimal.c:92
92 in dl-minimal.c
(gdb)
Continuing.
Breakpoint 1, calloc (nmemb=nmemb@entry=1056, size=size@entry=1) at
dl-minimal.c:92
92 in dl-minimal.c
(gdb)
Continuing.
Breakpoint 1, calloc (nmemb=nmemb@entry=18, size=size@entry=16) at
dl-minimal.c:92
92 in dl-minimal.c
(gdb)
Continuing.
Additional info:
yugr@yugr-VirtualBox:~$ lsb_release -rd
Description: Ubuntu 18.04.1 LTS
Release: 18.04
yugr@yugr-VirtualBox:~$ apt-cache policy ltrace
ltrace:
Installed: 0.7.3-6ubuntu1
Candidate: 0.7.3-6ubuntu1
Version table:
*** 0.7.3-6ubuntu1 500
500 http://gb.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
100 /var/lib/dpkg/status
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ltrace 0.7.3-6ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-33.36-generic 4.15.18
Uname: Linux 4.15.0-33-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Sep 13 07:58:16 2018
InstallationDate: Installed on 2018-09-01 (11 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
SourcePackage: ltrace
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: ltrace (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic
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https://bugs.launchpad.net/bugs/1792306
Title:
ltrace prints wrong operands in calloc calls
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