Noteworthy changes in release ?.?? (????-??-??)
===============================================
+* Improvements
+ * Implemented decoding of kvm vcpu exit reason (-e kvm=vcpu option),
+ requires Linux kernel version 4.16.0 or higher.
+ * Implemented decoding of KVM_SET_CPUID2 and KVM_GET_*_CPUID ioctl commands.
+
+Noteworthy changes in release 4.23 (2018-06-14)
+===============================================
+
+* Changes in behaviour
+ * On x32 personality, 64-bit syscalls (such as readv) are now shown with "#64"
+ suffix instead of "64:" prefix. Unlike the old names, these new names
+ can be used in syscall qualification expressions.
+ * Changed error number output format: error numbers are consistently
+ printed as "-1 ECONST (Error description)"
+ for known errors and as "-1 (errno 123)" for unknown errors,
+ regardless of -e raw qualification settings. One can specify
+ -X raw for displaying raw error numbers unconditionally.
+ * Unfetchable addresses inside arrays are now printed as comments.
+ * Obsolete IA-32 mode syscall names are no longer printed on ia64.
+
+* Improvements
+ * Implemented libdw backend for -k option, configured at build time
+ using --with-libdw option.
+ Whether -k option is compiled is now configured at build time
+ using --enable-stacktrace option.
+ * Added -X option for configuring xlat output formatting (addresses
+ Debian bug #692915).
+ * Added support for personality designation ("64", "32", or "x32") to syscall
+ qualifications in -e trace expressions.
+ * Implemented injection of syscalls with no side effects as an alternative
+ to injection of an invalid syscall (-e inject=SET:syscall= expression).
+ * Improved support for reproducible builds (addresses Debian bug #896016).
+ * Implemented decoding of BPF_PROG_QUERY and BPF_RAW_TRACEPOINT_OPEN bpf
+ syscall commands.
+ * Implemented decoding of INOTIFY_IOC_SETNEXTWD and PERF_EVENT_IOC_* ioctl
+ commands.
+ * Implemented decoding of PR_GET_SPECULATION_CTRL and PR_SET_SPECULATION_CTRL
+ prctl syscall options.
+ * Enhanced decoding of bpf, getsockopt, setsockopt, and socket syscalls.
+ * Enhanced decoding of NETLINK_KOBJECT_UEVENT and NETLINK_ROUTE protocols.
+ * Enhanced decoding of *_DIAG_MEMINFO netlink attributes.
+ * Enhanced decoding of BTRFS_*, FS_IOC_*, SIOCGIFHWADDR, and SIOCSIFHWADDR
+ ioctl commands.
+ * Enhanced decoding of AF_BLUETOOTH socket addresses.
+ * Implemented decoding of io_pgetevent syscall.
+ * Wired up rseq syscall.
+ * Updated lists of ADJ_*, BPF_*, BPF_F_*, BPF_PROG_TYPE_*, ETH_P_*, FPE_*,
+ IFF_*, IPPROTO_*, MAP_*, MS_*, MSG_*, NETLINK_*, PACKET_*, PROT_*, SCTP_*,
+ SECCOMP_FILTER_FLAG_*, SEGV_*, SEM_*, SHM_*, SW_*, V4L2_CID_*,
+ V4L2_CTRL_CLASS_*, and V4L2_PIX_FMT_* constants.
+ * Updated lists of ioctl commands from Linux 4.17.
+
+* Bug fixes
+ * Fixed decoding of msgtyp argument of msgrcv syscall.
+ * Fixed fallback definitions for F_*, MCL_*, MSG_ZEROCOPY, SI_*,
+ and SOL_SOCKET constants.
+ * Fixed -e trace=%pure expression on mips.
+
+Noteworthy changes in release 4.22 (2018-04-05)
+===============================================
+
* Changes in infrastructure
* The mailing list was moved to strace-devel@lists.strace.io.
+ * SourceForge git repository
+ (https://sourceforge.net/p/strace/code/ci/master/tree/) is no longer
+ maintained. Please use GitLab (https://gitlab.com/strace/strace/)
+ or GitHub (https://github.com/strace/strace/) repository instead.
* Changes in behaviour
+ * When printing string data, '8' and '9' following an octal escape sequence
+ no longer lead to unabbreviated octal escape sequence output, as they used
+ to do.
* Angle brackets are now printed as octal number escape sequences
in the output of paths associated with file descriptors.
+ * Data dump for write syscalls (-e write) is performed regardless
+ of successfulness of these syscall (addresses Debian bug #436284).
+ * -r and -t options are now affect output independently. Previously,
+ -r option led to ignoring of the -t option (addresses Debian bug #466195).
* Improvements
* Implemented delay injection (-e inject=SET:delay_enter= and
-e inject=SET:delay_exit= options).
+ * Added -A option for opening output files in append mode
+ (addresses Debian bug #528488).
* IPv6 addresses shown in socket information in -yy mode are now printed
in brackets.
- * Enhanced decoding of prctl and ptrace syscalls.
- * Enhanced decoding of BTRFS_IOC_INO_PATHS and BTRFS_IOC_LOGICAL_INO ioctl
- commands.
+ * Enhanced decoding of bpf, prctl and ptrace syscalls.
+ * Enhanced decoding of BTRFS_IOC_INO_PATHS, BTRFS_IOC_LOGICAL_INO, and PTP_*
+ ioctl commands.
* Enhanced NETLINK_ROUTE protocol decoding.
* Updated lists of signal codes.
* Updated lists of BPF_*, BTN_*, ETH_P_*, INET_DIAG_BC_*, KEY_*, POLL*, RWF_*,
- SCHED_FLAG_*, and SCTP_* constants.
+ SCHED_FLAG_*, SCTP_* and error constants.
* Implemented block/character device number printing in -yy mode.
* Known pixel/SDR format names are printed as comments for pixelformat fields
in v4l2 structures.
* Enhanced decoding of kern_features syscall.
+ * Enhanced NETLINK_NETFILTER netlink protocol decoder.
+ * Optimized handling of large number of tracees.
+ * Improved wall clock time measurement in syscall count statistics
+ (-c -w option).
+ * Extended the range of allowed values in -e inject=...:retval= expression.
* Added i18n support.
+ * Updated lists of ioctl commands from Linux 4.16.
+ * Enhanced manual page.
* Bug fixes
* Fixed build on m68k.
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