1 Noteworthy changes in release ?.? (????-??-??)
2 ==============================================
5 * Implemented decoding of pidfd_open syscall.
6 * Enhanced decoding of NETLINK_ROUTE protocol.
7 * Implemented decoding of UNIX_DIAG_UID netlink attribute.
8 * Updated lists of BPF_*, ETH_*, KEYCTL_*, KVM_*, MAP_*, SO_*, TCP_*, V4L2_*,
9 XDP_*, and *_MAGIC constants.
10 * Updated lists of ioctl commands from Linux 5.3.
13 * Fixed syscall tampering on arc, avr32, csky, ia64, m68k, metag, mips,
14 nios2, or1k, riscv, s390, s390x, sparc, sparc64, and tile architectures
15 when PTRACE_GET_SYSCALL_INFO is in use.
16 * Fixed tests on alpha with Linux kernel headers 5.1+.
19 * Removed support for decoding syscalls in range [1024...1079] on AArch64
20 architecture as this range has never been implemented in mainline kernel
23 Noteworthy changes in release 5.2 (2019-07-12)
24 ==============================================
27 * Implemented syscall return status filtering with -e status=set option
28 and its aliases: -z (limit syscall printing to successful syscalls only)
29 and -Z (limit syscall printing to failed syscalls only). Addresses Debian
31 * Implemented decoding of open_tree, move_mount, fsopen, fsconfig, fsmount,
33 * Enhanced decoding of bpf, clone, inotify_init, mbind, and set_mempolicy
35 * Updated lists of AT_*, AUDIT_*, BPF_*, CLONE_*, ETH_*, KEY_*, KVM_*, MPOL_*,
36 TIPC_*, and V4L2_* constants.
37 * Updated lists of ioctl commands from Linux 5.2.
40 * Fixed syscall tampering on powerpc and powerpc64 when
41 PTRACE_GET_SYSCALL_INFO is in use.
42 * Fixed build with cutting-edge toolchain.
44 Noteworthy changes in release 5.1 (2019-05-22)
45 ==============================================
48 * Fixed decoding of last two arguments of clone syscall on riscv.
51 * Added C-SKY architecture support.
52 * Implemented decoding of SO_TIMESTAMP*_NEW control messages.
53 * Implemented decoding of clock_gettime64, clock_settime64, clock_adjtime64,
54 clock_getres_time64, clock_nanosleep_time64, timer_gettime64,
55 timer_settime64, timerfd_gettime64, timerfd_settime64, utimensat_time64,
56 pselect6_time64, ppoll_time64, io_pgetevents_time64, recvmmsg_time64,
57 mq_timedsend_time64, mq_timedreceive_time64, semtimedop_time64,
58 rt_sigtimedwait_time64, futex_time64, sched_rr_get_interval_time64,
59 pidfd_send_signal, io_uring_setup, io_uring_enter, and io_uring_register
61 * Enhanced decoding of bpf syscall.
62 * Wired up getegid, geteuid, getppid, io_pgetevents, statfs64, and fstatfs64
64 * Wired up kexec_file_load and migrate_pages syscalls on arm.
65 * Wired up io_pgetevents, perf_event_open, seccomp, and statx syscalls
67 * Wired up seccomp syscall on m68k.
68 * Wired up statx syscall on sh.
69 * Wired up pkey_mprotect, pkey_alloc, and pkey_free syscalls on alpha, hppa,
70 ia64, m68k, s390, s390x, sh, sparc, and sparc64.
71 * Wired up rseq syscall on alpha, hppa, ia64, m68k, sh, sparc, sparc64,
73 * Wired up direct ipc syscalls on m68k, mips o32, powerpc, powerpc64,
74 s390, s390x, sh, sparc, sparc64, and x86.
75 * Updated lists of BPF_*, FAN_*, F_SEAL_*, IPV6_*, NT_*, PR_SPEC_*, SO_*,
77 * Updated lists of ioctl commands from Linux 5.1.
79 Noteworthy changes in release 5.0 (2019-03-19)
80 ==============================================
83 * -D option now implies -I4: by default strace ignores SIGHUP, SIGINT,
84 SIGQUIT, SIGPIPE, SIGTERM, SIGTTIN, SIGTTOU, and SIGTSTP when -D option
86 * Diagnostic message is no longer printed if an attempt to restart a process
87 has failed with ESRCH. (Addresses RHBZ bug #1662936.)
88 * ASCII dump no longer tries to read the whole buffer at once. As result,
89 it can fail with a diagnostic message after dumping only a part.
90 Amount of preceding zeroes printed for offset is now chosen in a way
91 to accommodate all the digits of all the offsets being printed.
94 * Changed the way tracees are handled: all pending tracees are now waited for
95 before further processing, this improves fairness of tracee processing.
96 (Addresses RHBZ bugs #478419, #526740, #851457, #1609318, #1610774,
97 and maybe some others.)
98 * Enhanced xlat styles support configured by -X option.
99 * Enhanced decoding of bpf syscall.
100 * Enhanced decoding of PTRACE_PEEKUSER and PTRACE_POKEUSER on hppa.
101 * Enhanced pid formatting in strace-log-merge output.
102 * Wired up kexec_file_load and rseq syscalls on aarch64, arc, metag, nios2,
103 or1k, riscv, and tile architectures.
104 * Updated lists of BPF_*, BTRFS_*, FAN_*, IFLA_*, KERN_*, KVM_CAP_*, NDA_*,
105 NETNSA_*, NT_*, PR_*, REL_*, SECCOMP_*, SCTP_*, UDP_*, V4L2_*, and *_MAGIC
107 * Updated lists of ioctl commands from Linux 5.0.
110 * Fixed ordering of sockaddr_in6 fields.
111 * Fixed strace-k test on alpha.
112 * Fixed build on mips o32.
113 * Fixed build on NOMMU architectures.
114 * Fixed build in --with-libiberty=yes mode.
115 * Fixed potential NULL dereference during printing of line continuation
116 for syscalls that haven't been decoded.
117 * Fixed strace-log-merge error diagnostics.
119 Noteworthy changes in release 4.26 (2018-12-26)
120 ===============================================
123 * The test suite is now provided under the terms of
124 the GNU General Public License version 2 or later.
125 * All the rest of strace is now provided under the terms of
126 the GNU Lesser General Public License version 2.1 or later.
128 * Changes in behavior
129 * If strace is interrupted by a signal it handles (currently
130 one of HUP, INT, QUIT, PIPE, or TERM), strace terminates
131 itself with this signal.
134 * Implemented obtainment of system call information using
135 PTRACE_GET_SYSCALL_INFO ptrace API.
136 * Implemented decoding of PTRACE_GET_SYSCALL_INFO ptrace request.
137 * Implemented decoding of BLKGETZONESZ, BLKGETNRZONES, and RND* ioctl
139 * Enhanced xlat styles support configured by -X option.
140 * Enhanced internet address formatting in structureless contexts.
141 * Enhanced decoding of getsockopt SO_ERROR option.
142 * Enhanced error diagnostics when the first exec fails.
143 * Added %net as a short form of %network in syscall specifications.
144 * Updated lists of ABS_*, BPF_*, FAN_*, IFA_*, IFLA_*, KVM_CAP_*, NETLINK_*,
145 NTF_*, PR_SPEC_*, REL_*, SOL_*, TCA_*, and V4L2_* constants.
146 * Updated lists of ioctl commands from Linux 4.20.
147 * Enhanced manual page.
150 * Fixed "xlat_idx: Unexpected xlat value 0" warnings.
151 * Fixed sthyi output format on s390.
152 * Documented -X option in strace -h output.
154 Noteworthy changes in release 4.25 (2018-10-30)
155 ===============================================
158 * Implemented decoding of KVM_CHECK_EXTENSION and NBD_* ioctl commands.
159 * Implemented decoding of SOL_XDP socket option names.
160 * Implemented decoding of AF_PACKET protocols in socket syscall.
161 * Implemented decoding of AF_AX25 and AF_X25 addresses, protocols,
163 * Implemented stack trace printing on receiving signals.
164 * Enhanced xlat styles support configured by -X option.
165 * Enhanced decoding of IFLA_*, NETCONFA_*, and SMC_DIAG_* netlink attributes.
166 * Wired up io_pgetevents syscall on arm, sparc, and sparc64.
167 * Updated lists of AF_*, AUDIT_*, BPF_*, IFLA_*, IN_*, IPSTATS_*,
168 IPV4_DEVCONF_*, NT_*, SCTP_*, SO_*, SOCK_*, SOL_*, and V4L2_* constants.
169 * Updated lists of ioctl commands from Linux 4.19.
172 * Fixed decoding of bit sets in evdev ioctl commands.
173 * Fixed decoding of EVIOCGBIT(0, ...) ioctl commands.
174 * Fixed test suite for the case when mlockall and unimplemented syscalls
175 are explicitly disabled by a seccomp filter.
177 Noteworthy changes in release 4.24 (2018-08-14)
178 ===============================================
181 * Implemented decoding of kvm vcpu exit reason (-e kvm=vcpu option),
182 requires Linux kernel version 4.16.0 or higher.
183 * Implemented decoding of KVM_SET_CPUID2 and KVM_GET_*_CPUID ioctl commands.
184 * Enhanced decoding of corner cases of SO_LINGER, SO_PEERCRED,
185 and PACKET_STATISTICS getsockopt options.
186 * Wired up io_pgetevents and rseq syscalls on hppa, microblaze, mips, powerpc,
188 * Updated lists of AUDIT_*, BPF_*, IFA_*, IFLA_*, RTA_*, RTPROT_*, TCP_*,
189 TRAP_*, and UDP_* constants.
190 * Updated lists of ioctl commands from Linux 4.18.
193 * Fixed decoding of Q_XGETQSTAT on non-native personalities.
194 * Fixed race condition in aio test.
195 * Fixed build with Bionic libc.
196 * Fixed build with glibc-2.28.
197 * Fixed build in exotic systemd-nspawn based environments.
198 * Fixed build on s390 with kernel headers that do not contain Linux commit
201 Noteworthy changes in release 4.23 (2018-06-14)
202 ===============================================
204 * Changes in behaviour
205 * On x32 personality, 64-bit syscalls (such as readv) are now shown with "#64"
206 suffix instead of "64:" prefix. Unlike the old names, these new names
207 can be used in syscall qualification expressions.
208 * Changed error number output format: error numbers are consistently
209 printed as "-1 ECONST (Error description)"
210 for known errors and as "-1 (errno 123)" for unknown errors,
211 regardless of -e raw qualification settings. One can specify
212 -X raw for displaying raw error numbers unconditionally.
213 * Unfetchable addresses inside arrays are now printed as comments.
214 * Obsolete IA-32 mode syscall names are no longer printed on ia64.
217 * Implemented libdw backend for -k option, configured at build time
218 using --with-libdw option.
219 Whether -k option is compiled is now configured at build time
220 using --enable-stacktrace option.
221 * Added -X option for configuring xlat output formatting (addresses
223 * Added support for personality designation ("64", "32", or "x32") to syscall
224 qualifications in -e trace expressions.
225 * Implemented injection of syscalls with no side effects as an alternative
226 to injection of an invalid syscall (-e inject=SET:syscall= expression).
227 * Improved support for reproducible builds (addresses Debian bug #896016).
228 * Implemented decoding of BPF_PROG_QUERY and BPF_RAW_TRACEPOINT_OPEN bpf
230 * Implemented decoding of INOTIFY_IOC_SETNEXTWD and PERF_EVENT_IOC_* ioctl
232 * Implemented decoding of PR_GET_SPECULATION_CTRL and PR_SET_SPECULATION_CTRL
233 prctl syscall options.
234 * Enhanced decoding of bpf, getsockopt, setsockopt, and socket syscalls.
235 * Enhanced decoding of NETLINK_KOBJECT_UEVENT and NETLINK_ROUTE protocols.
236 * Enhanced decoding of *_DIAG_MEMINFO netlink attributes.
237 * Enhanced decoding of BTRFS_*, FS_IOC_*, SIOCGIFHWADDR, and SIOCSIFHWADDR
239 * Enhanced decoding of AF_BLUETOOTH socket addresses.
240 * Implemented decoding of io_pgetevent syscall.
241 * Wired up rseq syscall.
242 * Updated lists of ADJ_*, BPF_*, BPF_F_*, BPF_PROG_TYPE_*, ETH_P_*, FPE_*,
243 IFF_*, IPPROTO_*, MAP_*, MS_*, MSG_*, NETLINK_*, PACKET_*, PROT_*, SCTP_*,
244 SECCOMP_FILTER_FLAG_*, SEGV_*, SEM_*, SHM_*, SW_*, V4L2_CID_*,
245 V4L2_CTRL_CLASS_*, and V4L2_PIX_FMT_* constants.
246 * Updated lists of ioctl commands from Linux 4.17.
249 * Fixed decoding of msgtyp argument of msgrcv syscall.
250 * Fixed fallback definitions for F_*, MCL_*, MSG_ZEROCOPY, SI_*,
251 and SOL_SOCKET constants.
252 * Fixed -e trace=%pure expression on mips.
254 Noteworthy changes in release 4.22 (2018-04-05)
255 ===============================================
257 * Changes in infrastructure
258 * The mailing list was moved to strace-devel@lists.strace.io.
259 * SourceForge git repository
260 (https://sourceforge.net/p/strace/code/ci/master/tree/) is no longer
261 maintained. Please use GitLab (https://gitlab.com/strace/strace/)
262 or GitHub (https://github.com/strace/strace/) repository instead.
264 * Changes in behaviour
265 * When printing string data, '8' and '9' following an octal escape sequence
266 no longer lead to unabbreviated octal escape sequence output, as they used
268 * Angle brackets are now printed as octal number escape sequences
269 in the output of paths associated with file descriptors.
270 * Data dump for write syscalls (-e write) is performed regardless
271 of successfulness of these syscall (addresses Debian bug #436284).
272 * -r and -t options are now affect output independently. Previously,
273 -r option led to ignoring of the -t option (addresses Debian bug #466195).
276 * Implemented delay injection (-e inject=SET:delay_enter= and
277 -e inject=SET:delay_exit= options).
278 * Added -A option for opening output files in append mode
279 (addresses Debian bug #528488).
280 * IPv6 addresses shown in socket information in -yy mode are now printed
282 * Enhanced decoding of bpf, prctl and ptrace syscalls.
283 * Enhanced decoding of BTRFS_IOC_INO_PATHS, BTRFS_IOC_LOGICAL_INO, and PTP_*
285 * Enhanced NETLINK_ROUTE protocol decoding.
286 * Updated lists of signal codes.
287 * Updated lists of BPF_*, BTN_*, ETH_P_*, INET_DIAG_BC_*, KEY_*, POLL*, RWF_*,
288 SCHED_FLAG_*, SCTP_* and error constants.
289 * Implemented block/character device number printing in -yy mode.
290 * Known pixel/SDR format names are printed as comments for pixelformat fields
292 * Enhanced decoding of kern_features syscall.
293 * Enhanced NETLINK_NETFILTER netlink protocol decoder.
294 * Optimized handling of large number of tracees.
295 * Improved wall clock time measurement in syscall count statistics
297 * Extended the range of allowed values in -e inject=...:retval= expression.
298 * Added i18n support.
299 * Updated lists of ioctl commands from Linux 4.16.
300 * Enhanced manual page.
303 * Fixed build on m68k.
304 * Fixed v4l2 pixelformat decoding on big-endian architectures.
307 Noteworthy changes in release 4.21 (2018-02-13)
308 ===============================================
310 * Changes in behaviour
311 * Warning is now issued when -F option is used.
312 * Warning is now issued when a tracee with unsupported personality
314 * Unknown syscall numbers are now printed in hexadecimal form.
317 * Implemented decoding of netlink descriptor attributes as file descriptors.
318 * Implemented decoding of hugetlb page size selection flags.
319 * Implemented decoding of BPF_PROG_TEST_RUN, BPF_PROG_GET_NEXT_ID,
320 BPF_MAP_GET_NEXT_ID, BPF_PROG_GET_FD_BY_ID, BPF_MAP_GET_FD_BY_ID,
321 and BPF_OBJ_GET_INFO_BY_FD commands of bpf syscall.
322 * Enhanced decoding of get_thread_area, memfd_create, modify_ldt,
323 perf_event_open, reboot, s390_guarded_storage, s390_pcio_mmio_read,
324 s390_pci_mmio_write, s390_runtime_instr, s390_sthyi, set_thread_area,
326 * Implemented decoding of KVM_* and DM_LIST_DEVICES ioctl commands.
327 * Implemented decoding of riscv_flush_icache syscall.
328 * Enhanced decoding of getsockopt and setsockopt syscalls for SOL_NETLINK
330 * Enhanced decoding of BPF_MAP_CREATE command of bpf syscall.
331 * Print values returned by mq_open syscall and first arguments
332 of mq_getsetattr, mq_notify, mq_timedreceive, and mq_timedsend syscalls
334 * Added decoding of get_tls syscall on arm.
335 * Added -e trace=%pure option for tracing system calls with no arguments that
337 * Updated lists of IPV6_*, MAP_*, MEMBARRIER_CMD_*, MSG_*, NT_*, PKEY_*,
338 SHM_*, and TCP_* constants.
339 * Added manual page for the strace-log-merge command.
340 * Updated lists of ioctl commands from Linux 4.15.
341 * Implemented biarch support for s390x.
342 * Implemented an optional support for symbol demangling in strace -k output
343 (activated by --with-libiberty configure option).
344 * Information about availability of demangling and reliable personality
345 decoding (on architectures with multiple personalities) is now available
347 * Added decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls on
348 powerpc and powerpc64.
349 * Enhanced manual page.
352 * Fixed multi-personality support in cross builds.
353 * Added mq_getsetattr, mq_notify, mq_open, mq_timedreceive, and mq_timedsend
354 syscalls to %desc tracing set.
355 * Fixed path tracing support for mmap syscalls with indirect arguments and
356 for old select syscall.
357 * Fixed decoding of arm-specific (__ARM_NR_*) syscalls.
358 * Fixed open mode flags decoding.
359 * Fixed corner cases in handling of strace -ff -ttt logs by strace-log-merge.
360 * Error counts that exceed one billion are now printed correctly in call
362 * Fixed call summary header for x32 personality.
363 * Changes of tracee personalities are reported more reliably.
364 * Fixed the case when strace attaches to a tracee being inside exec and its
365 first syscall stop is syscall-exit-stop instead of syscall-enter-stop,
366 which messed up all the syscall state tracking.
367 * Fixed printing of higher 32 bits of the return value for x32 personality.
370 * A C compiler that supports "for" loop initial declarations is now required.
371 * Inability to configure multiple personality support on architectures where
372 multiple personalities are supported leads to configuration failure during
373 build now. Use --enable-mpers=check to revert to the old behaviour.
374 * Build-time requirement for the mpers support has been lowered from gawk 4
376 * Removed incomplete and non-functional support for the CRIS architecture.
377 * Removed incomplete and unused support for IA-32 mode on the IA-64
380 Noteworthy changes in release 4.20 (2017-11-13)
381 ===============================================
384 * Implemented decoding of NETLINK_NETFILTER netlink message types and flags.
385 * Implemented decoding of SECCOMP_GET_ACTION_AVAIL operation of seccomp
387 * Updated lists of ARPHRD_*, BPF_*, ETH_P_*, LOOP_*, MADV_*,
388 MEMBARRIER_CMD_*, MFD_*, SECCOMP_*, SO_*, SOL_*, TCP_*, and UFFD_FEATURE_*
390 * Added decoding of statx syscall on hppa.
391 * Updated lists of ioctl commands from Linux 4.14.
394 * Fixed powerpc personality support on powerpc64.
396 Noteworthy changes in release 4.19 (2017-09-05)
397 ===============================================
399 * Changes in behaviour
400 * Changed formatting of personality names on tile architecture in order
401 to make it in line with other multi-personality architectures.
402 * Changed field output order in struct v4l2_requestbuffers to improve in/out
404 * Changed handling of multiple signal= specifications in an injection
405 expression: multiple specification now leads to error instead of implicit
406 usage the last specification.
409 * Enhanced decoding of optlen argument of getsockopt syscall.
410 * Enhanced decoding of SO_LINGER option of getsockopt and setsockopt syscalls.
411 * Enhanced decoding of SO_PEERCRED option of getsockopt syscall.
412 * Enhanced decoding of IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP,
413 IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_JOIN_ANYCAST,
414 IPV6_LEAVE_ANYCAST, MCAST_JOIN_GROUP, and MCAST_LEAVE_GROUP options
415 of setsockopt syscall.
416 * Enhanced decoding of KEYCTL_DH_COMPUTE operation of keyctl syscall
417 (KDF parameters decoding).
418 * Implemented decoding of KEYCTL_RESTRICT_KEYRING operation of keyctl syscall.
419 * Enhanced decoding of UFFDIO_API ioctl command.
420 * Enhanced decoding of BPF_PROG_LOAD, BPF_MAP_CREATE, BPF_MAP_LOOKUP_ELEM,
421 and BPF_MAP_GET_NEXT_KEY commands of bpf syscall.
422 * Implemented decoding of linux socket filter programs specified
423 for SO_ATTACH_FILTER and SO_ATTACH_REUSEPORT_CBPF socket options.
424 * Implemented decoding of inet_diag_req_v2, inet_diag_req_compat,
425 packet_diag_msg, and smc_diag_msg netlink attributes of NETLINK_SOCK_DIAG.
426 * Implemented NETLINK_SELINUX protocol specific decoding.
427 * Implemented decoding of netlink message ack flags.
428 * Implemented decoding of nlmsgerr netlink attributes.
429 * Implemented basic protocol specific decoding of NETLINK_CRYPTO.
430 * Implemented decoding of crypto_user_alg netlink attributes
432 * Implemented basic protocol specific decoding of addr, addrlabel, dcb, link,
433 mdb, neigh, neightbl, netconf, nsid, route, rule, tc, and tca messages
435 * Implemented decoding of NETLINK_KOBJECT_UEVENT messages.
436 * Improved handling of unexpected tracees (the ones that cloned with
437 CLONE_PARENT/CLONE_PTRACE or called PTRACE_TRACEME on themselves): they
438 are now PTRACE_DETACH'ed instead of PTRACE_CONT'ed.
439 * Updated lists of BPF_*, KEY_*, RWF_*, SCM_*, SO_*, and *_MAGIC constants.
440 * Added decoding of arch_prctl syscall on x86.
441 * Added decoding of seccomp, bpf, userfaultfd, membarrier, mlock2,
442 copy_file_range, preadv2, pwritev2, and statx on alpha.
443 * Added decoding of statx syscall on microblaze.
444 * Added decoding of s390_guarded_storage syscall on s390.
445 * Updated lists of ioctl commands from Linux 4.13.
446 * Enhanced manual page.
449 * Fixed printing of group_req structure on non-native personalities.
450 * Fixed output formatting of blkpg_ioctl_arg, dm_name_list, and iocb
452 * Fixed formatting of nul-terminated strings which have kernel-imposed size
454 * Fixed printing of paths that hit PATM_MAX limit in order to match kernel's
456 * Fixed build warnings on Android mips64.
457 * Fixed unused function "is_negated_errno" build warning when built
459 * Fixed syscall number and arguments retrieval behaviour on sparc64 and
460 mips o32 after prctl(PR_SET_DUMPABLE, 0) makes PTRACE_PEEKTEXT impossible
461 to use if Linux kernel has commit v4.10-rc1~114^2~2.
462 * Fixed path tracing for execveat, symlink, symlinkat, inotify_add_watch,
463 and inotify_init syscalls.
464 * Fixed personality switch printing on sparc64 and risc-v.
466 Noteworthy changes in release 4.18 (2017-07-05)
467 ===============================================
470 * Implemented decoding of SCM_TIMESTAMP* control messages.
471 * Implemented decoding of netlink NLMSG_DONE messages.
472 * Implemented decoding of netlink generic nlmsg_type and nlmsg_flags.
473 * Implemented decoding of NETLINK_AUDIT, NETLINK_NETFILTER, NETLINK_ROUTE,
474 NETLINK_SELINUX, NETLINK_SOCK_DIAG, and NETLINK_XFRM message types.
475 * Implemented decoding of NETLINK_GENERIC protocol families.
476 * Implemented basic protocol specific decoding of AF_INET, AF_INET6,
477 AF_NETLINK, AF_PACKET, AF_SMC, and AF_UNIX messages of NETLINK_SOCK_DIAG.
478 * Implemented basic decoding of netlink attributes.
479 * Implemented basic protocol specific decoding of AF_INET, AF_NETLINK,
480 AF_PACKET, AF_SMC, and AF_UNIX netlink attributes of NETLINK_SOCK_DIAG.
481 * Implemented decoding of inet_diag_msg, netlink_diag_msg, and unix_diag_msg
482 netlink attributes of NETLINK_SOCK_DIAG.
483 * Updated lists of ARPHRD_*, KEYCTL_*, NDIAG_SHOW_*, RTM_*, SCM_*, SCTP_*,
484 SO_*, V4L2_*, and prctl ARCH_* constants.
485 * Updated lists of ioctl commands from Linux 4.12.
488 * In interactive mode (-I2), those signals that were blocked at startup
489 will remain blocked for the whole period of strace execution.
490 * strace no longer resets SIGCHLD handler in tracees to the default action.
491 * When traced command is terminated by a blocked signal, strace unblocks
492 that signal to ensure its own termination with the same signal.
493 * Fixed corner cases in decoding of old sigaction syscall.
494 * Fixed build with old kernel headers on mips.
495 * Fixed build on aarch64 and tile with glibc >= 2.26.
496 * Fixed build on arc and nios2.
498 Noteworthy changes in release 4.17 (2017-05-24)
499 ===============================================
501 * Changes in command line syntax
502 * Syscall classes specified in -e trace= option now have % prefix (like
503 -e trace=%process). Old style class names without leading % are still
504 supported, but considered deprecated now.
507 * Optimized syscall filtering.
508 * Improved representation of timestamps.
509 * Enhanced decoding of sched_setattr syscall.
510 * Added -e trace=%stat option for tracing variants of stat syscall.
511 * Added -e trace=%lstat option for tracing variants of lstat syscall.
512 * Added -e trace=%fstat option for tracing variants of fstat and fstatat
514 * Added -e trace=%%stat option for tracing syscalls used for querying file
515 status information (stat, lstat, fstat, fstatat, statx, and their
517 * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs
519 * Added -e trace=%fstatfs option for tracing fstatfs, fstatfs64 and fstatvfs
521 * Added -e trace=%%statfs option for tracing syscalls used for querying file
522 system statistics information (statfs-like, fstatfs-like and ustat).
523 * Added -e trace=/regex option for filtering syscalls using regular
525 * Added support for prepending of question mark before syscall qualification
526 in -e trace expressions in order to suppress error in case no syscalls
527 matched the provided qualification.
528 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
529 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
530 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
532 * Implemented decoding of statx syscall.
533 * Implemented decoding of NS_* ioctl commands.
534 * Implemented decoding of the remaining V4L2_BUF_TYPE_* types.
535 * Implemented decoding of VIDIOC_[SG]_TUNER ioctl commands.
536 * Implemented decoding of NLMSG_ERROR netlink messages.
537 * Improved decoding of BPF_PROG_ATTACH command of bpf syscall.
538 * Improved decoding of misplaced parts in DM_* ioctl commands.
539 * Updated lists of ioctl commands from Linux 4.11.
542 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
543 * Fixed the number of arguments and tracing flags of alpha specific syscalls.
544 * Fixed decoding of old sigsuspend syscall on alpha, cris, mips, powerpc,
545 powerpc64, sh, sh64, sparc, and sparc64.
546 * Fixed decoding of sgetmask and ssetmask syscalls on 64-bit architectures.
547 * Fixed decoding of netlink messages received within struct msghdr.
548 * Worked around a bug in miscompiled aarch64 kernels leading to the 3rd
549 argument of sched_getattr syscall being not quite 32-bit.
550 * Fixed corner cases of printing inaccessible times argument of utimes
551 and futimesat syscalls.
553 Noteworthy changes in release 4.16 (2017-02-14)
554 ===============================================
557 * Implemented syscall return value injection (-e inject=SET:retval= option).
558 * Implemented signal injection (-e inject=SET:signal= option).
559 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
560 * Implemented decoding of all SG_* ioctl commands.
561 * Implemented decoding of ustat syscall.
562 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
563 and BPF_PROG_DETACH commands of bpf syscall.
564 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
565 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
567 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
568 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
569 * Updated lists of ioctl commands from Linux 4.10.
570 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
574 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
575 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
576 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
577 and pwritev* syscalls on x32.
578 * Fixed printing of string arguments of getxattr and setxattr syscalls
579 when -s option is used to limit the printed string size.
580 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
582 * Fixed decoding of SG_* and LOOP_* ioctl commands.
583 * Fixed build on mips with musl libc.
584 * Fixed cross-building of ioctlsort.
585 * Applied minor formatting fixes to the manual page.
587 Noteworthy changes in release 4.15 (2016-12-14)
588 ===============================================
590 * Changes in behavior
591 * Time stamps are now printed according to ISO 8601.
592 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
593 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
594 syscalls is now formatted as an array.
597 * Implemented syscall fault injection (-e fault=... option).
598 * Implemented decoding of DM_* ioctl commands.
599 * Implemented decoding of attr parameter of perf_event_open syscall.
600 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
601 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
602 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
604 * Implemented PTRACE_GETREGS API support on m68k.
605 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
606 and V4L2_* constants.
607 * Updated lists of ioctl commands from Linux 4.9.
608 * Added decoding of recently added syscalls on arc, x32, and xtensa.
609 * Enhanced manual page.
612 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
613 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
614 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
615 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
616 setgroups, setns, unshare, and utimes syscalls.
617 * Fixed handling of verbose flag in printing of controls array
618 of struct v4l2_ext_controls.
619 * Fixed omission of field names in the output of capability, sigaction,
620 sigevent, statfs, timespec, timeval, and utimbuf structures.
621 * Fixed printing of unknown syscalls in siginfo structure.
622 * Fixed decoding of ioctl constants on m68k.
623 * Fixed cris architecture support.
624 * Fixed cross build when host compiler does not support the same
625 set of warning flags as the cross compiler.
626 * Fixed build on SLE10 and SLE11.
628 Noteworthy changes in release 4.14 (2016-10-04)
629 ===============================================
631 * Changes in behavior
632 * When using -p option without a command and no processes has been attached,
633 strace exits with exit status 1.
636 * Added printing of the mode argument of open and openat syscalls
637 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
638 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
639 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
640 and aio family syscalls.
641 * Implemented fetching of the 7th subcall argument on mips o32.
642 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
644 * Updated lists of ioctl commands from Linux 4.8.
645 * Added decoding of new syscalls on sh and sh64.
646 * Added RISC-V architecture support.
649 * Marked io_setup and io_destroy as memory mapping related syscalls.
650 * Fixed leakage of placeholder descriptors to tracees.
651 * Fixed printing of mode_t, umode_t, and umask types.
652 * Fixed decoding of iovec arrays without a limit on total data size.
653 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
654 and ipc family syscalls.
655 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
656 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
658 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
659 * Fixed decoding of struct stat64 on sparc64.
660 * Fixed decoding of uid and gid-related syscalls on sparc64.
661 * Fixed decoding of the forth argument of semctl syscall on sparc64.
662 * Fixed values of tty ioctl constants on sparc64.
663 * Fixed sparc personality support on sparc64.
665 Noteworthy changes in release 4.13 (2016-07-26)
666 ===============================================
669 * Implemented a general netlink socket parser.
670 * Enhanced decoding of socket addresses.
671 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
672 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
673 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
674 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
675 and *_MAGIC constants.
676 * Updated lists of ioctl commands from Linux 4.7.
679 * Fixed decoding of pid_t argument of prlimit64 syscall.
680 * Fixed sign extension issues in the parser of struct rusage.
681 * Fixed race condition in decoding of timeout argument of recvmmsg and
682 rt_sigtimedwait syscalls.
683 * Fixed build with fresh linux kernel headers.
685 Noteworthy changes in release 4.12 (2016-05-31)
686 ===============================================
689 * Implemented simultaneous use of -p option and tracing of a command.
690 (addresses Debian bug #549942).
691 * Implemented caching of netlink conversations to reduce amount of time
692 spent in decoding socket details in -yy mode.
693 * Implemented -yy mode decoding of protocol:portid pairs associated with
694 netlink socket descriptors.
695 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
696 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
698 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
699 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
700 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
701 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
702 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
703 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
704 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
705 statfs64, tgkill, waitid, and xattr family syscalls.
706 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
707 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
708 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
709 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
710 * Added decoding of fadvise64 and fadvise64_64 on s390.
711 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
712 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
713 * Updated lists of ioctl commands from Linux 4.6.
716 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
717 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
718 * Fixed decoding of mlock2 syscall on sparc.
719 * Fixed decoding of osf_shmat syscall on alpha.
720 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
721 (addresses Debian bug #485979 and Fedora bug #1298294).
722 * Fixed decoding of preadv syscall in case of short read.
723 * Fixed decoding and dumping of readv syscall in case of short read.
724 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
725 * Fixed decoding of mincore syscall's last argument.
726 * Fixed remaining errors in mapping between syscall numbers and numbers
727 of syscall arguments.
728 * Applied various fixes to strace-graph script.
730 Noteworthy changes in release 4.11 (2015-12-21)
731 ===============================================
733 * Changes in behavior
734 * Some syscalls have different names depending on architecture and
735 personality. In these cases, syscall filtering and printing now
736 consistently uses the names that match corresponding __NR_* kernel
737 macros of the tracee's architecture and personality.
738 * Added strace prefix to all diagnostic messages.
741 * Enhanced and extended test suite.
742 * Implemented reliable tracing of processes whose personality differs
743 from the personality of strace, fixed decoding of 32-bit personality
744 syscalls on 64-bit architectures.
745 * When some data referenced by syscall arguments is irrelevant or cannot
746 be read from tracee's memory, strace now prints its address consistently.
747 * When a syscall is restarted using restart_syscall mechanism, strace now
748 shows the syscall name on architectures that expose this information.
749 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
750 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
751 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
752 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
753 * Optimized decoding of indirect socket syscalls.
754 * Implemented decoding of nanoseconds along with seconds in stat family
755 syscalls (addresses Fedora bug #1251176).
756 * Implemented decoding of struct statfs.f_flags in statfs syscall.
757 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
759 * Implemented decoding of indirect syscall on mips o32.
760 * Implemented decoding of IPPROTO_IP control messages.
761 * Implemented decoding of setsockopt syscall multicast arguments.
762 * Enhanced decoding of struct sigevent.
763 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
764 and v4l2 ioctl syscall arguments.
765 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
766 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
767 sendfile, setsockopt, and shmctl syscalls.
768 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
769 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
770 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
771 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
772 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
773 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
775 * Added Nios II architecture support.
776 * Added new syscall entries to match Linux 4.4.
779 * Fixed potential short read of strings from tracee's memory.
780 * Fixed -qq option in conjunction with -o option.
781 * Fixed filtering of <unavailable> syscalls.
782 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
783 with 64-bit aligned structures.
784 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
785 syscall flags arguments.
786 * Fixed decoding of 4th argument of clock_nanosleep syscall.
787 * Fixed decoding of getpagesize syscall on m68k.
788 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
789 * Fixed decoding of timezone argument of gettimeofday and settimeofday
791 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
793 * Fixed decoding of pipe syscall on alpha and mips.
794 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
795 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
796 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
798 * Fixed decoding of 4th argument of semctl indirect syscall.
799 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
800 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
801 * Fixed decoding of struct dirent on x32.
802 * Fixed decoding of times syscall return value on mips n32 and x32.
803 * Fixed decoding of path argument of umount2 syscall
804 (addresses Debian bug #785050).
805 * Worked around a kernel bug in tracing privileged executables.
806 * Fixed various errors in mapping between syscall numbers and associated
807 information like the number of syscall arguments, the name of syscall,
810 Noteworthy changes in release 4.10 (2015-03-06)
811 ===============================================
814 * Added -yy option to print protocol and address information associated with
816 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
817 recvmsg, sendmmsg, and recvmmsg syscalls.
818 * Implemented full 32-bit decoding of ioctl commands
819 (addresses Debian bug #692913 and Fedora bug #902788).
820 * Implemented PTRACE_GETREGS API support on ia64.
821 * Implemented PTRACE_GETREGS API support on mips.
822 * Implemented PTRACE_GETREGSET API support on s390/s390x.
823 * Implemented decoding of getrandom and seccomp syscalls.
824 * Implemented full decoding of 64-bit capability sets.
825 * Implemented decoding of all prctl commands.
826 * Implemented decoding of parametrized ioctl commands.
827 * Implemented decoding of evdev ioctl commands.
828 * Implemented decoding of v4l ioctl commands.
829 * Implemented decoding of SG_IO v4 ioctl commands.
830 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
831 * Implemented decoding of FALLOC_FL_* fallocate flags.
832 * Implemented decoding of rt_sigreturn signal mask on aarch64,
834 * Enhanced socket decoder to support bluetooth sockets.
835 * Enhanced decoding of unlisted ioctl commands.
836 * Enhanced decoding of getsockopt and setsockopt syscall.
837 * Enhanced decoding of sysinfo syscall.
838 * Enhanced decoding of struct cmsghdr.
839 * Enhanced decoding of wait status.
840 * Enhanced aio support on non-x86 architectures by using external libaio.h.
841 * Added O_TMPFILE to the list of recognized open mode flags.
842 * Updated the list of filesystem type constants that is used in decoding
843 statfs family syscalls.
844 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
846 * Updated lists of signal constants from Linux 3.19.
847 * Updated lists of errno constants from Linux 3.19.
848 * Updated lists of ioctl commands from Linux 3.9.
849 * Added new syscall entries to match Linux 3.19.
852 * Fixed various errors in mapping between syscall numbers and associated
853 information like the number of syscall arguments, the name of syscall,
855 * Fixed quoting issues in printing descriptors, filenames, network interface
856 names, struct utsname members, device/volume names of BLK* ioctl commands.
857 * Fixed uid_t/git_t decoding.
858 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
859 * Fixed potential open flags truncation on some architectures.
860 * Fixed decoding of struct ifreq.ifr_name.
861 * Fixed decoding of SIOCSIFNAME ioctl command.
862 * Fixed decoding of RENAME_* renameat2 flags.
863 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
864 * Fixed decoding of indirect ipc subcalls on some architectures.
865 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
866 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
867 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
868 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
869 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
870 sparc, sparc64, mips, and s390.
871 * Fixed instruction pointer output (-i option) on architectures that support
872 several personalities.
873 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
875 * Fixed build on systems where struct sigaction has no sa_restorer member.
876 * Fixed build with uclibc and musl libc.
879 * Linux kernel >= 2.5.46 is required.
880 Older versions without a decent PTRACE_SETOPTIONS support will not work.
881 * On mips, linux kernel >= 2.6.15 is required.
882 Older versions without a decent PTRACE_GETREGS support will not work.
883 * On s390 and s390x, linux kernel >= 2.6.27 is required.
884 Older versions without a decent PTRACE_GETREGSET support will not work.
886 Noteworthy changes in release 4.9 (2014-08-15)
887 ==============================================
889 * Changes in behavior
890 * Disabled OABI support on ARM EABI systems by default,
891 added --enable-arm-oabi option to enable it at configure time.
894 * Added experimental -k option to print stack trace after each traced syscall.
895 * Added -w option to produce stats on syscall latency.
896 (addresses Debian bug #457497).
897 * Added ARC architecture support.
898 * Added PTRACE_GETREGS API support on PowerPC.
899 * Enhanced Bionic libc and musl libc support.
900 * Enhanced tracing of x86 personality processes on x86_64 and x32.
901 * Enhanced tracing of ARM personality processes on AArch64.
902 * Enhanced 32/64bit personality detection on PowerPC.
903 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
904 renameat2, and request_key syscalls.
905 * Robustified decoding of select, pselect, and io_submit syscalls.
906 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
907 setdomainname, sethostname, setns, and sync_file_range syscalls.
908 * Enhanced decoding of signal bitmasks.
909 * Enhanced decoding of file descriptors.
910 * Enhanced siginfo_t decoding.
911 * Enhanced PF_NETLINK decoding.
912 * Updated CLOCK_* constants
913 (addresses Fedora bug #1088455).
914 * Added new syscall entries to match Linux 3.16.
917 * Added shmat and shmdt to the set of memory mapping related syscalls.
918 * Fixed detaching from stopped processes.
919 * Fixed fanotify_mark decoding on 32bit architectures.
920 * Fixed offset decoding in preadv and pwritev syscalls.
921 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
922 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
923 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
924 (addresses Fedora bug #993384).
925 * Miscellaneous corrections in the manual page.
926 (Addresses Debian bug #725987).
928 Noteworthy changes in release 4.8 (2013-06-03)
929 ==============================================
931 * Changes in behavior
932 * In case of normal strace termination, when the trace output is
933 redirected to a pipe, strace now closes it and waits for the pipe
934 process termination before exit.
937 * Implemented tracing using PTRACE_SEIZE API (when available).
938 * Implemented more reliable PTRACE_GETREGSET-based process personality
939 detection on x86-64 and x32 (when available).
940 * Added -e trace=memory option for tracing memory mapping related syscalls.
941 * Documented -b option.
942 * Allowed exit status messages to be suppressed by giving -q option twice.
943 * Added AArch64 architecture support
944 (addresses Debian bug #693074 and Fedora bug #969858).
945 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
946 * Added tilegx personality support for Tile.
947 * Enhanced support of NOMMU architectures.
948 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
950 * Added new syscall entries to match Linux 3.9.
951 * Regenerated the list of common ioctl names from Linux 3.9.
952 * Updated the list of errno constants.
953 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
954 PTRACE_O_*, and TCP_* constants.
955 * Implemented decoding of UBI ioctls.
956 * Removed redundant "*32" ioctl names.
959 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
960 (addresses Fedora bug #659382).
961 * Fixed kernel release string parsing
962 (addresses Debian bug #702309).
963 * Fixed decoding of *xattr syscalls
964 (addresses Fedora bug #885233).
965 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
966 (addresses Fedora bug #912790).
967 * Fixed tracing forks on SPARC.
968 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
969 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
970 and truncate64 syscalls.
971 * Fixed categories of multiple syscalls on most of supported architectures.
972 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
973 * Fixed decoding of multiple 32-bit personality syscalls on x32.
974 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
975 S390x, and Tile architectures.
976 * Fixed semtimedop decoding on S390x.
977 * Fixed sram_alloc decoding on Blackfin.
978 * Fixed build when process_vm_readv is a stab.
979 * Fixed build with older versions of libaio.h.
981 Noteworthy changes in release 4.7 (2012-05-02)
982 ==============================================
984 * Changes in behavior
985 * strace no longer suspends waitpid until there is a child
986 for waitpid'ing process to collect status from.
987 * strace no longer detaches from a tracee which is supposed
989 * strace now issues a new message: "+++ exited with EXITCODE +++"
990 which shows exact moment strace got exit notification,
991 analogous to existing "+++ killed by SIG +++" message.
994 * Added x32 personality support (x86_64 architecture).
995 * Added -y and -P options to print file descriptor paths and
996 filter by those paths.
997 * Added -I option to control strace interactivity.
998 * Allowed -p option to take comma or whitespace-separated list of PIDs.
999 * Added strace_log_merge script helper to merge timestamped "strace -ff"
1001 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
1002 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
1003 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
1004 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
1005 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
1006 listxattr, setrlimit and swapon syscalls.
1007 * Implemented decoding of loop and mtd ioctls.
1008 * Added syscall entries for new linux syscalls.
1009 * Added syscall entries for direct socket system calls on powerpc.
1010 * Updated the list of errno constants.
1011 * Updated lists of MSG_*, STA_*, and TCP_* constants.
1012 * Regenerated the list of ioctl names from Linux 3.3.
1013 * Enhanced switching between processes with different personalities.
1014 * Enhanced signals reporting by using short signal names.
1015 * Made ERESTART* messages more descriptive.
1016 * Made parsing of numbers from strings more robust.
1017 * Added support for compat_statfs64 and statfs64.f_flags.
1018 * Changed read of data blocks to use single process_vm_readv syscall
1019 (when available) instead of several PTRACE_PEEKDATA operations.
1020 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
1021 operation instead of several PTRACE_PEEKUSER operations.
1022 * Applied various optimizations to make strace work faster.
1025 * Implemented proper handling of real SIGTRAPs on kernels supporting
1026 PTRACE_O_TRACESYSGOOD.
1027 (Addresses Fedora bug #162774).
1028 * Fixed sockaddr_un.sun_path name in decoded output.
1029 (Addresses Debian bug #554946).
1030 * Fixed to avoid potential core file clobbering on exit.
1031 (Addresses Debian bug #656398).
1032 * Fixed a typo in documentation.
1033 (Addresses Debian bug #653309).
1034 * Fixed decoding of timer id returned by timer_create.
1035 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
1036 * Fixed *at syscalls flags decoding.
1037 * Fixed ARM EABI 64-bit syscall's arguments decoding.
1038 * Fixed semtimedop decoding on s390.
1039 * Fixed osf_sigprocmask decoding on alpha.
1040 * Fixed ipc and socket subcall decoding on several architectures.
1041 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
1042 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
1043 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
1044 * Corrected io_* syscall entries on ARM.
1045 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
1046 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
1047 * Fixed build when libaio-devel is not available.
1048 * Fixed configure checks for PTRACE_* constants.
1049 * Fixed compilation warnings remained on several architectures.
1052 * Removed all non-Linux code. After years of neglect, that dead code
1053 just hampered further strace development.
1054 * Linux kernel >= 2.6.18 is recommended. Older versions might still
1055 work but they haven't been thoroughly tested with this release.
1057 Noteworthy changes in release 4.6 (2011-03-15)
1058 ==============================================
1060 * Changes in behavior
1061 * Print diagnostic information about changes in personality mode to
1062 standard error instead of standard output.
1065 * Implemented a new method of following clone, fork, and vfork
1066 syscalls using the Linux kernel's explicit facilities for tracing
1067 creation of threads and child processes.
1068 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
1069 * Implemented decoding of TLS syscalls on m68k.
1070 * Implemented biarch support on powerpc64.
1071 * Implemented biarch support for getrlimit() and setrlimit().
1072 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
1073 * Implemented SOL_SCTP socket options decoding.
1074 * Added HDIO_* ioctl names.
1075 (Addresses Debian bug #450953).
1076 * Added LOOP_* ioctl names.
1077 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
1078 to match Linux 2.6.37.
1079 * Updated the list of IPPROTO_* constants to match netinet/in.h.
1080 * Implemented decoding of HDIO_* and BLK* ioctls.
1081 * Added MicroBlaze architecture support.
1082 * Added new syscall entries to match Linux 2.6.37.
1083 * Regenerated list of ioctl names from Linux 2.6.37.
1084 * Enhanced signal notification decoding.
1085 * Documented -C and -D options.
1088 * Fixed fetching syscall arguments on m68k.
1089 * Fixed an error when judging whether a process has children.
1090 * Fixed get/set_robust_list syscall numbers for powerpc.
1091 * Fixed a corner case in printing clone flags.
1092 * Fixed cross-compiling issues.
1093 * Fixed build issues on powerpc64, SH and SPARC.
1094 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
1095 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
1096 fanotify_init, and fanotify_mark syscalls.
1097 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
1098 * Fixed biarch support in IO dumping.
1099 * Fixed raw exit_group decoding.
1100 * Fixed decoding of file descriptors on 64-bit architectures.
1101 * Fixed a corner case in waitpid handling.
1102 (Addresses Red Hat bug #663547).
1103 * Fixed stat64 decoding on mips
1104 (Addresses Debian bug #599028).
1105 * Fixed misleading italics in the manual page.
1106 (Addresses Debian bug #589323).
1108 Noteworthy changes in release 4.5.20 (2010-04-13)
1109 =================================================
1112 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
1113 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
1114 rt_tgsigqueueinfo, perf_event_open.
1115 * Enhanced decoding of recently added syscalls on non-x86 architectures
1116 by replacing a bare decoder with elaborate parsers enabled earlier
1118 * Implemented -C option to combine regular and -c output.
1119 (Addresses Debian bug #466196)
1120 * Enhanced decoding of mbind and mremap syscalls.
1121 * Enhanced SOL_PACKET socket options decoding.
1122 * Regenerated list of ioctl names from linux 2.6.33.
1123 * Added TILE architecture support.
1126 * Fixed build with Linux kernel headers 2.6.32-rc5+.
1127 (Addresses Debian bug #560516 and Fedora bug #539044)
1128 * Fixed build on mips.
1129 * Fixed handling of Linux systems without struct statfs64.
1130 * Fixed reporting signal mask by sigreturn on powerpc.
1131 * Fixed potential stack buffer overflow in select decoder.
1132 (Addresses Fedora bug #556678)
1133 * Corrected msgsnd indirect ipccall decoding.
1134 * Corrected decoding of 64bit syscalls.
1135 (Addresses Debian bug #570603)
1136 * Corrected getsockopt decoding on architectures where
1137 sizeof(long) > sizeof(int).
1138 (Addresses Debian bug #494844)
1139 * Corrected decoding of epoll_pwait.
1140 (Addresses Debian bug #513014)
1141 * Corrected handling of killed threads.
1143 Noteworthy changes in release 4.5.19 (2009-10-21)
1144 =================================================
1146 * Changes in behavior
1147 * When command exits, strace now exits with the same exit status.
1148 If command is terminated by a signal, strace terminates itself
1149 with the same signal, so that strace can be used as a wrapper
1150 process transparent to the invoking parent process.
1151 When using -p option, the exit status of strace is zero unless
1152 there was an unexpected error in doing the tracing.
1153 (Addresses Fedora bug #105371 and Debian bug #37665)
1156 * Implemented decoding of new Linux syscalls: accept4, dup3,
1157 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
1158 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
1159 * Implemented decoding of accept4 socketcall.
1160 * Enhanced prctl decoding.
1161 * Enhanced nanosleep decoding.
1162 * Enhanced ptrace decoding.
1163 * Enhanced futex decoding.
1164 * Enhanced CAP_* decoding.
1165 * Enhanced SIOCS* ioctls decoding.
1166 * Enhanced fcntl F_* flags decoding.
1167 * Enhanced semop/semtimedop decoding.
1168 * Updated ARM architecture support.
1169 * Added Blackfin architecture support.
1170 * Added AVR32 architecture support.
1171 * Added CRIS architecture support.
1172 * Made strace detect when traced process suddenly disappeared.
1175 * Fixed syscall numbers for tee and sync_file_range.
1176 (Addresses Debian bug #503124)
1177 * Fixed several bugs in strings decoder, including potential heap
1179 (Addresses Fedora bugs #470529, #478324 and #511035)
1180 * Marked sendfile(2) as a network syscall.
1181 (Addresses Debian bug #509499)
1182 * Fixed accept(2) decoding.
1183 (Addresses Debian bug #507573)
1184 * Fixed sigtimedwait(2) decoding.
1185 * Fixed build on ARM EABI.
1186 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
1187 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
1188 (Addresses Red Hat bug #471169)
1189 * Fixed display of 32-bit argv array on 64-bit architectures.
1190 (Addresses Fedora bug #519480)
1191 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
1192 * Fixed HPPA architecture support.
1193 (Addresses Debian bugs #437928 and #546619)
1198 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
1199 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
1204 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
1205 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
1206 * Improved output for prctl system call on Linux.
1207 * Improved support for Linux/ARM.
1208 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
1213 * Improved output for delete_module, futex, and mbind system calls on Linux.
1214 * Improved output for SG_IO ioctls on Linux.
1215 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
1216 eventfd, getcpu, epoll_pwait.
1221 * Several biarch improvements.
1222 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
1223 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
1228 * Accept numeric system calls in -e.
1233 * Introduce "-e trace=desc".
1238 * Better x86-64 support for IA32 processes.
1239 * Update PowerPC system calls.
1240 * Better printing for Linux aio system calls.
1244 * Quick fix release for build issues.
1245 * One fix for Linux/ARM system call table.
1250 * Print fault address for SIGSEGV/SIGBUS signals when available.
1255 * Improve socket ioctl printing.
1256 * Update Linux/IA64 syscall list.
1257 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
1258 * Improve mount flags printing.
1259 * Support symbolic printing of x86_64 arch_prctl parameters.
1264 * Update syscall tables for Alpha, ARM, HPPA.
1265 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
1266 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
1267 * Improve ioctl command name matching.
1268 * Print RTC_* ioctl structure contents.
1269 * Support newer RLIMIT_* values.
1270 * Print struct cmsghdr details in sendmsg.
1275 * Print attribute values in *xattr system calls on Linux.
1276 * Include pread and pwrite calls in -e read and -e write tracing.
1277 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
1278 * Print clock_t values symbolically in Linux clock_* system calls.
1282 * Bug fixes, Linux ioctl updates.
1283 * David Miller contributed support for Linux/SPARC64.
1291 * Update Linux ioctl lists.
1292 * Update PF_* and AF_* value lists.
1293 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
1298 * On Linux using NPTL threads, -p will now attach to all threads in a process.
1299 * Handle new mq_* system calls in Linux 2.6.6 and later.
1304 * Report some new VM_* bit values on Linux.
1305 * Better output for Linux sched_* system calls.
1310 * Display multiple ioctl name matches on Linux.
1314 * New port to AMD's x86-64 architecture. One strace binary can
1315 handle both new x86-64 and old i386 processes.
1316 * Fixed support for LFS64 calls.
1317 * New switch -E to add/remove environment variables for the command.
1318 * Merged s390/s390x port.
1319 * Trace an unbounded number of processes.
1320 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
1321 * Fixed bugs with attach/detach leaving things stopped.
1322 * Fixed traced process seeing ECHILD despite live, traced children
1323 in waitpid calls with WNOHANG.
1324 * Stuart Menefy contributed a port to Linux/SH.
1325 * Stephen Thomas contributed a port to Linux/SH64.
1326 * Many other bug fixes.
1330 * Fix Linux/ia64 support, looks like someone renamed a few things on us
1331 * Fix the ioctl setup for Linux, turned out it did not really work.
1332 Improve the ioctl extractor as well so we decode some more ones.
1336 * compile fixes for Linux/mips
1340 * Linux ia64 and hppa ports added
1341 * The usual Linux syscall updates (includes 32bit uid/gid support),
1342 * Linux ioctl list updated
1343 * Support IPv6 scope ids
1344 * FreeBSD/i386 port added
1345 * UnixWare and Solaris updates
1346 * Better support for tracing multithreaded processes in Linux
1350 * Compiles on glibc2.0 systems again
1351 * Linux/S390 port added
1352 * The usual Linux syscall updates
1353 * we can follow fork on arm now
1357 * Linux/MIPS port added
1358 * Lots of Linux updates again
1359 * Improved IPv6 support
1365 * Compiles on glibc2.0 systems again
1369 * Get stat structure properly on Linux 64bit archs
1370 * Personalities work again
1371 * Compile correctly on SunOS again
1377 * Linux (ultra)sparc fixes
1384 * add support for more Linux architectures (powerpc, sparc, arm)
1385 * support lots more Linux syscalls
1386 * fix signal handling
1387 * add IPX and IPIP support
1388 * check stray syscall after execv
1389 * fix hanging children
1391 Changes in version 3.1
1392 ======================
1394 * Irix5 is supported
1395 * Linux 68k is supported
1396 * Linux alpha is supported
1397 * configure is upgraded to autoconf 2.x
1398 * using -f in combination with -e now works correctly
1399 * output can be piped to a program
1400 * tracing setuid programs works better
1401 * it is now reasonable to install strace setuid to root in some circumstances
1402 * new useful tracing names like file and process to trace whole
1403 classes of system calls, e.g. -efile traces all system calls that
1404 take a file name as an argument
1405 * IPC calls on SunOS 4.1.x are decoded
1406 * Linux program memory is reliably dereferenced
1407 * Linux decodes at least the name of all syscalls as of pre2.0.4
1408 * various cosmetic changes and bug fixes
1410 Changes from versions 2.x to version 3.0
1411 ========================================
1413 * filename arguments are neither abbreviated nor stringified
1414 * string arguments are now true C strings using octal instead of hex by default
1415 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
1416 * by default the output for multiple processes now goes into one file
1417 * all structures, vectors, bitsets, etc. use consistent output formats
1418 * the -c option now means count calls, -i does what the old -c used to do
1420 New Features in version 3.0
1421 ===========================
1423 * non-ascii strings can be optionally printed entirely in hex
1424 * the output format is readable when multiple processes are generating output
1425 * exit values are printed in an alignment column
1426 * is is possible to suppress messages about attaching and detaching
1427 * various tracing features can be enabled on a per syscall/signal/desc basis
1428 * selective tracing of syscalls
1429 * selective printing of syscall structures
1430 * selective abbreviation of long structures on a per syscall basis
1431 * selective printing of raw syscall arguments and results
1432 * selective tracing of signals
1433 * selective dumping of all I/O read from file descriptors
1434 * selective dumping of all I/O written to file descriptors
1435 * optional counting of time, calls, and errors for each syscall
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