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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.
Bug: N/A
Test: strace -f date
Change-Id: I9eff306cca99b239815284a366315fb04686667a
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Noteworthy changes in release 4.21 (2018-02-13)
===============================================
* Changes in behaviour
* Warning is now issued when -F option is used.
* Warning is now issued when a tracee with unsupported personality
is attached.
* Unknown syscall numbers are now printed in hexadecimal form.
* Improvements
* Implemented decoding of netlink descriptor attributes as file descriptors.
* Implemented decoding of hugetlb page size selection flags.
* Implemented decoding of BPF_PROG_TEST_RUN, BPF_PROG_GET_NEXT_ID,
BPF_MAP_GET_NEXT_ID, BPF_PROG_GET_FD_BY_ID, BPF_MAP_GET_FD_BY_ID,
and BPF_OBJ_GET_INFO_BY_FD commands of bpf syscall.
* Enhanced decoding of get_thread_area, memfd_create, modify_ldt,
perf_event_open, reboot, s390_guarded_storage, s390_pcio_mmio_read,
s390_pci_mmio_write, s390_runtime_instr, s390_sthyi, set_thread_area,
and shmget syscalls.
* Implemented decoding of KVM_* and DM_LIST_DEVICES ioctl commands.
* Implemented decoding of riscv_flush_icache syscall.
* Enhanced decoding of getsockopt and setsockopt syscalls for SOL_NETLINK
level.
* Enhanced decoding of BPF_MAP_CREATE command of bpf syscall.
* Print values returned by mq_open syscall and first arguments
of mq_getsetattr, mq_notify, mq_timedreceive, and mq_timedsend syscalls
as file descriptors.
* Added decoding of get_tls syscall on arm.
* Added -e trace=%pure option for tracing system calls with no arguments that
never fail.
* Updated lists of IPV6_*, MAP_*, MEMBARRIER_CMD_*, MSG_*, NT_*, PKEY_*,
SHM_*, and TCP_* constants.
* Added manual page for the strace-log-merge command.
* Updated lists of ioctl commands from Linux 4.15.
* Implemented biarch support for s390x.
* Implemented an optional support for symbol demangling in strace -k output
(activated by --with-libiberty configure option).
* Information about availability of demangling and reliable personality
decoding (on architectures with multiple personalities) is now available
in strace -V output.
* Added decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls on
powerpc and powerpc64.
* Enhanced manual page.
* Bug fixes
* Fixed multi-personality support in cross builds.
* Added mq_getsetattr, mq_notify, mq_open, mq_timedreceive, and mq_timedsend
syscalls to %desc tracing set.
* Fixed path tracing support for mmap syscalls with indirect arguments and
for old select syscall.
* Fixed decoding of arm-specific (__ARM_NR_*) syscalls.
* Fixed open mode flags decoding.
* Fixed corner cases in handling of strace -ff -ttt logs by strace-log-merge.
* Error counts that exceed one billion are now printed correctly in call
summary output.
* Fixed call summary header for x32 personality.
* Changes of tracee personalities are reported more reliably.
* Fixed the case when strace attaches to a tracee being inside exec and its
first syscall stop is syscall-exit-stop instead of syscall-enter-stop,
which messed up all the syscall state tracking.
* Fixed printing of higher 32 bits of the return value for x32 personality.
* Portability
* A C compiler that supports "for" loop initial declarations is now required.
* Inability to configure multiple personality support on architectures where
multiple personalities are supported leads to configuration failure during
build now. Use --enable-mpers=check to revert to the old behaviour.
* Build-time requirement for the mpers support has been lowered from gawk 4
to gawk 3.
* Removed incomplete and non-functional support for the CRIS architecture.
* Removed incomplete and unused support for IA-32 mode on the IA-64
architecture.
Bug: N/A
Test: strace -f date
Change-Id: I126eec18d7309a89f5a75dcab6498c99bb099836
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Noteworthy changes in release 4.19 (2017-09-05)
===============================================
* Changes in behaviour
* Changed formatting of personality names on tile architecture in order
to make it in line with other multi-personality architectures.
* Changed field output order in struct v4l2_requestbuffers to improve in/out
field formatting.
* Changed handling of multiple signal= specifications in an injection
expression: multiple specification now leads to error instead of implicit
usage the last specification.
* Improvements
* Enhanced decoding of optlen argument of getsockopt syscall.
* Enhanced decoding of SO_LINGER option of getsockopt and setsockopt syscalls.
* Enhanced decoding of SO_PEERCRED option of getsockopt syscall.
* Enhanced decoding of IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP,
IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_JOIN_ANYCAST,
IPV6_LEAVE_ANYCAST, MCAST_JOIN_GROUP, and MCAST_LEAVE_GROUP options
of setsockopt syscall.
* Enhanced decoding of KEYCTL_DH_COMPUTE operation of keyctl syscall
(KDF parameters decoding).
* Implemented decoding of KEYCTL_RESTRICT_KEYRING operation of keyctl syscall.
* Enhanced decoding of UFFDIO_API ioctl command.
* Enhanced decoding of BPF_PROG_LOAD, BPF_MAP_CREATE, BPF_MAP_LOOKUP_ELEM,
and BPF_MAP_GET_NEXT_KEY commands of bpf syscall.
* Implemented decoding of linux socket filter programs specified
for SO_ATTACH_FILTER and SO_ATTACH_REUSEPORT_CBPF socket options.
* Implemented decoding of inet_diag_req_v2, inet_diag_req_compat,
packet_diag_msg, and smc_diag_msg netlink attributes of NETLINK_SOCK_DIAG.
* Implemented NETLINK_SELINUX protocol specific decoding.
* Implemented decoding of netlink message ack flags.
* Implemented decoding of nlmsgerr netlink attributes.
* Implemented basic protocol specific decoding of NETLINK_CRYPTO.
* Implemented decoding of crypto_user_alg netlink attributes
of NETLINK_CRYPTO.
* Implemented basic protocol specific decoding of addr, addrlabel, dcb, link,
mdb, neigh, neightbl, netconf, nsid, route, rule, tc, and tca messages
of NETLINK_ROUTE.
* Implemented decoding of NETLINK_KOBJECT_UEVENT messages.
* Improved handling of unexpected tracees (the ones that cloned with
CLONE_PARENT/CLONE_PTRACE or called PTRACE_TRACEME on themselves): they
are now PTRACE_DETACH'ed instead of PTRACE_CONT'ed.
* Updated lists of BPF_*, KEY_*, RWF_*, SCM_*, SO_*, and *_MAGIC constants.
* Added decoding of arch_prctl syscall on x86.
* Added decoding of seccomp, bpf, userfaultfd, membarrier, mlock2,
copy_file_range, preadv2, pwritev2, and statx on alpha.
* Added decoding of statx syscall on microblaze.
* Added decoding of s390_guarded_storage syscall on s390.
* Updated lists of ioctl commands from Linux 4.13.
* Enhanced manual page.
* Bug fixes
* Fixed printing of group_req structure on non-native personalities.
* Fixed output formatting of blkpg_ioctl_arg, dm_name_list, and iocb
structures.
* Fixed formatting of nul-terminated strings which have kernel-imposed size
limit.
* Fixed printing of paths that hit PATM_MAX limit in order to match kernel's
behaviour.
* Fixed build warnings on Android mips64.
* Fixed unused function "is_negated_errno" build warning when built
with clang.
* Fixed syscall number and arguments retrieval behaviour on sparc64 and
mips o32 after prctl(PR_SET_DUMPABLE, 0) makes PTRACE_PEEKTEXT impossible
to use if Linux kernel has commit v4.10-rc1~114^2~2.
* Fixed path tracing for execveat, symlink, symlinkat, inotify_add_watch,
and inotify_init syscalls.
* Fixed personality switch printing on sparc64 and risc-v.
Bug: N/A
Test: strace date
Change-Id: Idd0ba3efc3fe14dad8aa7b3859045b00d4e6749d
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