5.313. strace

Updated strace packages that fix a bug are now available for Red Hat Enterprise Linux 6.
The strace packages provide an utility to intercept and record the system calls called and received by a running process. The strace utility can print a record of each system call, its arguments, and its return value. The strace utility is useful for diagnosing, debugging, and instructional purposes.

Bug Fix

BZ#849052
Previously, the strace utility used magic breakpoints in the process startup code to detect and control process startup. Consequently, under certain circumstances, the %ebx register could be corrupted around the clone syscall within the libc_fork() function, which could cause an application to terminate unexpectedly with a segmentation fault while under strace control. This update changes strace to use the TRACE{FORK,VFORK,CLONE} ptrace capabilities which provide a cleaner, less error-prone interface to monitor and control process startup when tracing, thus preventing this bug.
All users of strace are advised to upgrade to these updated packages, which fix this bug.