Synopsis

ltrace bug fix and enhancement update

Type/Severity

Bug Fix Advisory

Topic

Updated ltrace packages that fix multiple bugs and add one enhancement are now
available for Red Hat Enterprise Linux 6.

Description

The ltrace utility is a debugging program that runs a specified command until
the command exits. While the command is executing, ltrace intercepts and records
both the dynamic library calls called by the executed process and the signals
received by the executed process. The ltrace utility can also intercept and
print system calls executed by the process.

This update fixes the following bugs:

• Prior to this update, a traced process that had more than one thread could be
  aborted if the threads ran into breakpoints which the ltrace utility did not
  handle. With this update, ltrace attaches to the newly created threads, and
  carefully handles the breakpoints so that tracing events are not missed. This
  update also improves the detach logic so that a running process to which ltrace
  has been attached is left in a consistent state before detaching. (BZ#742340)
  

Prior to this update, the ltrace utility could, under certain circumstances,
fail to trace returns from functions which where called with a tail call
optimization. This update adds support for tracing returns from functions called
with a tail call optimization. (BZ#811184)

This update also adds the following enhancement:

• Prior to this update, ltrace could not trace library functions loaded via
  libdl. This update changes the behavior of the "-x" option for placing static
  breakpoints so that dynamic libraries are also considered and breakpoints set in
  them. This works for dynamic libraries that are linked to the binary as well as
  those that are opened with the function "dlopen" in runtime. (BZ#738254)
  

All users of ltrace are advised to upgrade to this updated package, which fixes
these bugs and adds this update.

Solution

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/knowledge/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for IBM z Systems 6 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386

Fixes

• BZ - 742340 - ltrace cannot properly handle multi-threaded processes

CVEs

(none)

References

(none)

Red Hat Enterprise Linux Server 6

SRPM
ltrace-0.5-23.45svn.el6.src.rpm	SHA-256: 81f0d124c45ca30500405c46f33adb48f9b82d4608687610d9cf91be95ee1858
x86_64
ltrace-0.5-23.45svn.el6.x86_64.rpm	SHA-256: 18c78ff8f0b855e3a2f54c15ddbed2b52bd5b580de1764c3d5acff0fcdc896c4
ltrace-debuginfo-0.5-23.45svn.el6.x86_64.rpm	SHA-256: d910c88d77cac65cec05e2953d0456d359db8bb16f17e71777c5c7a19b802b85
i386
ltrace-0.5-23.45svn.el6.i686.rpm	SHA-256: b0cf1caa9dbbd05d99ed69ffeda95c83e55ef3fe37d9fda294fe22a16f4b4b30
ltrace-debuginfo-0.5-23.45svn.el6.i686.rpm	SHA-256: b23895d3c435d530aae1e81e58df7de16b8a53bf4fb72e2240b259cb96dde767

Red Hat Enterprise Linux Workstation 6

SRPM
ltrace-0.5-23.45svn.el6.src.rpm	SHA-256: 81f0d124c45ca30500405c46f33adb48f9b82d4608687610d9cf91be95ee1858
x86_64
ltrace-0.5-23.45svn.el6.x86_64.rpm	SHA-256: 18c78ff8f0b855e3a2f54c15ddbed2b52bd5b580de1764c3d5acff0fcdc896c4
ltrace-debuginfo-0.5-23.45svn.el6.x86_64.rpm	SHA-256: d910c88d77cac65cec05e2953d0456d359db8bb16f17e71777c5c7a19b802b85
i386
ltrace-0.5-23.45svn.el6.i686.rpm	SHA-256: b0cf1caa9dbbd05d99ed69ffeda95c83e55ef3fe37d9fda294fe22a16f4b4b30
ltrace-debuginfo-0.5-23.45svn.el6.i686.rpm	SHA-256: b23895d3c435d530aae1e81e58df7de16b8a53bf4fb72e2240b259cb96dde767

Red Hat Enterprise Linux Desktop 6

SRPM
ltrace-0.5-23.45svn.el6.src.rpm	SHA-256: 81f0d124c45ca30500405c46f33adb48f9b82d4608687610d9cf91be95ee1858
x86_64
ltrace-0.5-23.45svn.el6.x86_64.rpm	SHA-256: 18c78ff8f0b855e3a2f54c15ddbed2b52bd5b580de1764c3d5acff0fcdc896c4
ltrace-debuginfo-0.5-23.45svn.el6.x86_64.rpm	SHA-256: d910c88d77cac65cec05e2953d0456d359db8bb16f17e71777c5c7a19b802b85
i386
ltrace-0.5-23.45svn.el6.i686.rpm	SHA-256: b0cf1caa9dbbd05d99ed69ffeda95c83e55ef3fe37d9fda294fe22a16f4b4b30
ltrace-debuginfo-0.5-23.45svn.el6.i686.rpm	SHA-256: b23895d3c435d530aae1e81e58df7de16b8a53bf4fb72e2240b259cb96dde767

Red Hat Enterprise Linux for IBM z Systems 6

SRPM
ltrace-0.5-23.45svn.el6.src.rpm	SHA-256: 81f0d124c45ca30500405c46f33adb48f9b82d4608687610d9cf91be95ee1858
s390x
ltrace-0.5-23.45svn.el6.s390x.rpm	SHA-256: 5cdd7a89e51ee795dc4cba81ea49b5a5de61c524dfa03783354ab9c6684429ce
ltrace-debuginfo-0.5-23.45svn.el6.s390x.rpm	SHA-256: 4ef34a27ef45e4473ab473d60476f7c87cfe827027f54eaa0b6efd13996e53e7

Red Hat Enterprise Linux for Power, big endian 6

SRPM
ltrace-0.5-23.45svn.el6.src.rpm	SHA-256: 81f0d124c45ca30500405c46f33adb48f9b82d4608687610d9cf91be95ee1858
ppc64
ltrace-0.5-23.45svn.el6.ppc64.rpm	SHA-256: 9cb0822130791f01118a0cc1af483e7ff6f6fa73390e47faba5674b7960477db
ltrace-debuginfo-0.5-23.45svn.el6.ppc64.rpm	SHA-256: 73b21e624c56ece14a8a3e0df0f45f15fccaf0ae2012807b1963d138d6ad48e3

Red Hat Enterprise Linux for Scientific Computing 6

SRPM
ltrace-0.5-23.45svn.el6.src.rpm	SHA-256: 81f0d124c45ca30500405c46f33adb48f9b82d4608687610d9cf91be95ee1858
x86_64
ltrace-0.5-23.45svn.el6.x86_64.rpm	SHA-256: 18c78ff8f0b855e3a2f54c15ddbed2b52bd5b580de1764c3d5acff0fcdc896c4
ltrace-debuginfo-0.5-23.45svn.el6.x86_64.rpm	SHA-256: d910c88d77cac65cec05e2953d0456d359db8bb16f17e71777c5c7a19b802b85

Red Hat Enterprise Linux Server from RHUI 6

SRPM
ltrace-0.5-23.45svn.el6.src.rpm	SHA-256: 81f0d124c45ca30500405c46f33adb48f9b82d4608687610d9cf91be95ee1858
x86_64
ltrace-0.5-23.45svn.el6.x86_64.rpm	SHA-256: 18c78ff8f0b855e3a2f54c15ddbed2b52bd5b580de1764c3d5acff0fcdc896c4
ltrace-debuginfo-0.5-23.45svn.el6.x86_64.rpm	SHA-256: d910c88d77cac65cec05e2953d0456d359db8bb16f17e71777c5c7a19b802b85
i386
ltrace-0.5-23.45svn.el6.i686.rpm	SHA-256: b0cf1caa9dbbd05d99ed69ffeda95c83e55ef3fe37d9fda294fe22a16f4b4b30
ltrace-debuginfo-0.5-23.45svn.el6.i686.rpm	SHA-256: b23895d3c435d530aae1e81e58df7de16b8a53bf4fb72e2240b259cb96dde767