1 Noteworthy changes in release ?.?? (????-??-??)
2 ===============================================
5 * Updated lists of ARPHRD_*, BPF_*, ETH_P_*, MADV_*, MFD_*, SO_*, SOL_*,
6 TCP_*, and UFFD_FEATURE_* constants.
8 Noteworthy changes in release 4.19 (2017-09-05)
9 ===============================================
11 * Changes in behaviour
12 * Changed formatting of personality names on tile architecture in order
13 to make it in line with other multi-personality architectures.
14 * Changed field output order in struct v4l2_requestbuffers to improve in/out
16 * Changed handling of multiple signal= specifications in an injection
17 expression: multiple specification now leads to error instead of implicit
18 usage the last specification.
21 * Enhanced decoding of optlen argument of getsockopt syscall.
22 * Enhanced decoding of SO_LINGER option of getsockopt and setsockopt syscalls.
23 * Enhanced decoding of SO_PEERCRED option of getsockopt syscall.
24 * Enhanced decoding of IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP,
25 IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_JOIN_ANYCAST,
26 IPV6_LEAVE_ANYCAST, MCAST_JOIN_GROUP, and MCAST_LEAVE_GROUP options
27 of setsockopt syscall.
28 * Enhanced decoding of KEYCTL_DH_COMPUTE operation of keyctl syscall
29 (KDF parameters decoding).
30 * Implemented decoding of KEYCTL_RESTRICT_KEYRING operation of keyctl syscall.
31 * Enhanced decoding of UFFDIO_API ioctl command.
32 * Enhanced decoding of BPF_PROG_LOAD, BPF_MAP_CREATE, BPF_MAP_LOOKUP_ELEM,
33 and BPF_MAP_GET_NEXT_KEY commands of bpf syscall.
34 * Implemented decoding of linux socket filter programs specified
35 for SO_ATTACH_FILTER and SO_ATTACH_REUSEPORT_CBPF socket options.
36 * Implemented decoding of inet_diag_req_v2, inet_diag_req_compat,
37 packet_diag_msg, and smc_diag_msg netlink attributes of NETLINK_SOCK_DIAG.
38 * Implemented NETLINK_SELINUX protocol specific decoding.
39 * Implemented decoding of netlink message ack flags.
40 * Implemented decoding of nlmsgerr netlink attributes.
41 * Implemented basic protocol specific decoding of NETLINK_CRYPTO.
42 * Implemented decoding of crypto_user_alg netlink attributes
44 * Implemented basic protocol specific decoding of addr, addrlabel, dcb, link,
45 mdb, neigh, neightbl, netconf, nsid, route, rule, tc, and tca messages
47 * Implemented decoding of NETLINK_KOBJECT_UEVENT messages.
48 * Improved handling of unexpected tracees (the ones that cloned with
49 CLONE_PARENT/CLONE_PTRACE or called PTRACE_TRACEME on themselves): they
50 are now PTRACE_DETACH'ed instead of PTRACE_CONT'ed.
51 * Updated lists of BPF_*, KEY_*, RWF_*, SCM_*, SO_*, and *_MAGIC constants.
52 * Added decoding of arch_prctl syscall on x86.
53 * Added decoding of seccomp, bpf, userfaultfd, membarrier, mlock2,
54 copy_file_range, preadv2, pwritev2, and statx on alpha.
55 * Added decoding of statx syscall on microblaze.
56 * Added decoding of s390_guarded_storage syscall on s390.
57 * Updated lists of ioctl commands from Linux 4.13.
58 * Enhanced manual page.
61 * Fixed printing of group_req structure on non-native personalities.
62 * Fixed output formatting of blkpg_ioctl_arg, dm_name_list, and iocb
64 * Fixed formatting of nul-terminated strings which have kernel-imposed size
66 * Fixed printing of paths that hit PATM_MAX limit in order to match kernel's
68 * Fixed build warnings on Android mips64.
69 * Fixed unused function "is_negated_errno" build warning when built
71 * Fixed syscall number and arguments retrieval behaviour on sparc64 and
72 mips o32 after prctl(PR_SET_DUMPABLE, 0) makes PTRACE_PEEKTEXT impossible
73 to use if Linux kernel has commit v4.10-rc1~114^2~2.
74 * Fixed path tracing for execveat, symlink, symlinkat, inotify_add_watch,
75 and inotify_init syscalls.
76 * Fixed personality switch printing on sparc64 and risc-v.
78 Noteworthy changes in release 4.18 (2017-07-05)
79 ===============================================
82 * Implemented decoding of SCM_TIMESTAMP* control messages.
83 * Implemented decoding of netlink NLMSG_DONE messages.
84 * Implemented decoding of netlink generic nlmsg_type and nlmsg_flags.
85 * Implemented decoding of NETLINK_AUDIT, NETLINK_NETFILTER, NETLINK_ROUTE,
86 NETLINK_SELINUX, NETLINK_SOCK_DIAG, and NETLINK_XFRM message types.
87 * Implemented decoding of NETLINK_GENERIC protocol families.
88 * Implemented basic protocol specific decoding of AF_INET, AF_INET6,
89 AF_NETLINK, AF_PACKET, AF_SMC, and AF_UNIX messages of NETLINK_SOCK_DIAG.
90 * Implemented basic decoding of netlink attributes.
91 * Implemented basic protocol specific decoding of AF_INET, AF_NETLINK,
92 AF_PACKET, AF_SMC, and AF_UNIX netlink attributes of NETLINK_SOCK_DIAG.
93 * Implemented decoding of inet_diag_msg, netlink_diag_msg, and unix_diag_msg
94 netlink attributes of NETLINK_SOCK_DIAG.
95 * Updated lists of ARPHRD_*, KEYCTL_*, NDIAG_SHOW_*, RTM_*, SCM_*, SCTP_*,
96 SO_*, V4L2_*, and prctl ARCH_* constants.
97 * Updated lists of ioctl commands from Linux 4.12.
100 * In interactive mode (-I2), those signals that were blocked at startup
101 will remain blocked for the whole period of strace execution.
102 * strace no longer resets SIGCHLD handler in tracees to the default action.
103 * When traced command is terminated by a blocked signal, strace unblocks
104 that signal to ensure its own termination with the same signal.
105 * Fixed corner cases in decoding of old sigaction syscall.
106 * Fixed build with old kernel headers on mips.
107 * Fixed build on aarch64 and tile with glibc >= 2.26.
108 * Fixed build on arc and nios2.
110 Noteworthy changes in release 4.17 (2017-05-24)
111 ===============================================
113 * Changes in command line syntax
114 * Syscall classes specified in -e trace= option now have % prefix (like
115 -e trace=%process). Old style class names without leading % are still
116 supported, but considered deprecated now.
119 * Optimized syscall filtering.
120 * Improved representation of timestamps.
121 * Enhanced decoding of sched_setattr syscall.
122 * Added -e trace=%stat option for tracing variants of stat syscall.
123 * Added -e trace=%lstat option for tracing variants of lstat syscall.
124 * Added -e trace=%fstat option for tracing variants of fstat and fstatat
126 * Added -e trace=%%stat option for tracing syscalls used for querying file
127 status information (stat, lstat, fstat, fstatat, statx, and their
129 * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs
131 * Added -e trace=%fstatfs option for tracing fstatfs, fstatfs64 and fstatvfs
133 * Added -e trace=%%statfs option for tracing syscalls used for querying file
134 system statistics information (statfs-like, fstatfs-like and ustat).
135 * Added -e trace=/regex option for filtering syscalls using regular
137 * Added support for prepending of question mark before syscall qualification
138 in -e trace expressions in order to suppress error in case no syscalls
139 matched the provided qualification.
140 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
141 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
142 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
144 * Implemented decoding of statx syscall.
145 * Implemented decoding of NS_* ioctl commands.
146 * Implemented decoding of the remaining V4L2_BUF_TYPE_* types.
147 * Implemented decoding of VIDIOC_[SG]_TUNER ioctl commands.
148 * Implemented decoding of NLMSG_ERROR netlink messages.
149 * Improved decoding of BPF_PROG_ATTACH command of bpf syscall.
150 * Improved decoding of misplaced parts in DM_* ioctl commands.
151 * Updated lists of ioctl commands from Linux 4.11.
154 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
155 * Fixed the number of arguments and tracing flags of alpha specific syscalls.
156 * Fixed decoding of old sigsuspend syscall on alpha, cris, mips, powerpc,
157 powerpc64, sh, sh64, sparc, and sparc64.
158 * Fixed decoding of sgetmask and ssetmask syscalls on 64-bit architectures.
159 * Fixed decoding of netlink messages received within struct msghdr.
160 * Worked around a bug in miscompiled aarch64 kernels leading to the 3rd
161 argument of sched_getattr syscall being not quite 32-bit.
162 * Fixed corner cases of printing inaccessible times argument of utimes
163 and futimesat syscalls.
165 Noteworthy changes in release 4.16 (2017-02-14)
166 ===============================================
169 * Implemented syscall return value injection (-e inject=SET:retval= option).
170 * Implemented signal injection (-e inject=SET:signal= option).
171 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
172 * Implemented decoding of all SG_* ioctl commands.
173 * Implemented decoding of ustat syscall.
174 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
175 and BPF_PROG_DETACH commands of bpf syscall.
176 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
177 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
179 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
180 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
181 * Updated lists of ioctl commands from Linux 4.10.
182 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
186 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
187 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
188 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
189 and pwritev* syscalls on x32.
190 * Fixed printing of string arguments of getxattr and setxattr syscalls
191 when -s option is used to limit the printed string size.
192 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
194 * Fixed decoding of SG_* and LOOP_* ioctl commands.
195 * Fixed build on mips with musl libc.
196 * Fixed cross-building of ioctlsort.
197 * Applied minor formatting fixes to the manual page.
199 Noteworthy changes in release 4.15 (2016-12-14)
200 ===============================================
202 * Changes in behavior
203 * Time stamps are now printed according to ISO 8601.
204 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
205 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
206 syscalls is now formatted as an array.
209 * Implemented syscall fault injection (-e fault=... option).
210 * Implemented decoding of DM_* ioctl commands.
211 * Implemented decoding of attr parameter of perf_event_open syscall.
212 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
213 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
214 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
216 * Implemented PTRACE_GETREGS API support on m68k.
217 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
218 and V4L2_* constants.
219 * Updated lists of ioctl commands from Linux 4.9.
220 * Added decoding of recently added syscalls on arc, x32, and xtensa.
221 * Enhanced manual page.
224 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
225 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
226 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
227 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
228 setgroups, setns, unshare, and utimes syscalls.
229 * Fixed handling of verbose flag in printing of controls array
230 of struct v4l2_ext_controls.
231 * Fixed omission of field names in the output of capability, sigaction,
232 sigevent, statfs, timespec, timeval, and utimbuf structures.
233 * Fixed printing of unknown syscalls in siginfo structure.
234 * Fixed decoding of ioctl constants on m68k.
235 * Fixed cris architecture support.
236 * Fixed cross build when host compiler does not support the same
237 set of warning flags as the cross compiler.
238 * Fixed build on SLE10 and SLE11.
240 Noteworthy changes in release 4.14 (2016-10-04)
241 ===============================================
243 * Changes in behavior
244 * When using -p option without a command and no processes has been attached,
245 strace exits with exit status 1.
248 * Added printing of the mode argument of open and openat syscalls
249 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
250 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
251 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
252 and aio family syscalls.
253 * Implemented fetching of the 7th subcall argument on mips o32.
254 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
256 * Updated lists of ioctl commands from Linux 4.8.
257 * Added decoding of new syscalls on sh and sh64.
258 * Added RISC-V architecture support.
261 * Marked io_setup and io_destroy as memory mapping related syscalls.
262 * Fixed leakage of placeholder descriptors to tracees.
263 * Fixed printing of mode_t, umode_t, and umask types.
264 * Fixed decoding of iovec arrays without a limit on total data size.
265 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
266 and ipc family syscalls.
267 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
268 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
270 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
271 * Fixed decoding of struct stat64 on sparc64.
272 * Fixed decoding of uid and gid-related syscalls on sparc64.
273 * Fixed decoding of the forth argument of semctl syscall on sparc64.
274 * Fixed values of tty ioctl constants on sparc64.
275 * Fixed sparc personality support on sparc64.
277 Noteworthy changes in release 4.13 (2016-07-26)
278 ===============================================
281 * Implemented a general netlink socket parser.
282 * Enhanced decoding of socket addresses.
283 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
284 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
285 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
286 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
287 and *_MAGIC constants.
288 * Updated lists of ioctl commands from Linux 4.7.
291 * Fixed decoding of pid_t argument of prlimit64 syscall.
292 * Fixed sign extension issues in the parser of struct rusage.
293 * Fixed race condition in decoding of timeout argument of recvmmsg and
294 rt_sigtimedwait syscalls.
295 * Fixed build with fresh linux kernel headers.
297 Noteworthy changes in release 4.12 (2016-05-31)
298 ===============================================
301 * Implemented simultaneous use of -p option and tracing of a command.
302 (addresses Debian bug #549942).
303 * Implemented caching of netlink conversations to reduce amount of time
304 spent in decoding socket details in -yy mode.
305 * Implemented -yy mode decoding of protocol:portid pairs associated with
306 netlink socket descriptors.
307 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
308 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
310 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
311 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
312 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
313 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
314 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
315 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
316 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
317 statfs64, tgkill, waitid, and xattr family syscalls.
318 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
319 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
320 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
321 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
322 * Added decoding of fadvise64 and fadvise64_64 on s390.
323 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
324 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
325 * Updated lists of ioctl commands from Linux 4.6.
328 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
329 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
330 * Fixed decoding of mlock2 syscall on sparc.
331 * Fixed decoding of osf_shmat syscall on alpha.
332 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
333 (addresses Debian bug #485979 and Fedora bug #1298294).
334 * Fixed decoding of preadv syscall in case of short read.
335 * Fixed decoding and dumping of readv syscall in case of short read.
336 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
337 * Fixed decoding of mincore syscall's last argument.
338 * Fixed remaining errors in mapping between syscall numbers and numbers
339 of syscall arguments.
340 * Applied various fixes to strace-graph script.
342 Noteworthy changes in release 4.11 (2015-12-21)
343 ===============================================
345 * Changes in behavior
346 * Some syscalls have different names depending on architecture and
347 personality. In these cases, syscall filtering and printing now
348 consistently uses the names that match corresponding __NR_* kernel
349 macros of the tracee's architecture and personality.
350 * Added strace prefix to all diagnostic messages.
353 * Enhanced and extended test suite.
354 * Implemented reliable tracing of processes whose personality differs
355 from the personality of strace, fixed decoding of 32-bit personality
356 syscalls on 64-bit architectures.
357 * When some data referenced by syscall arguments is irrelevant or cannot
358 be read from tracee's memory, strace now prints its address consistently.
359 * When a syscall is restarted using restart_syscall mechanism, strace now
360 shows the syscall name on architectures that expose this information.
361 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
362 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
363 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
364 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
365 * Optimized decoding of indirect socket syscalls.
366 * Implemented decoding of nanoseconds along with seconds in stat family
367 syscalls (addresses Fedora bug #1251176).
368 * Implemented decoding of struct statfs.f_flags in statfs syscall.
369 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
371 * Implemented decoding of indirect syscall on mips o32.
372 * Implemented decoding of IPPROTO_IP control messages.
373 * Implemented decoding of setsockopt syscall multicast arguments.
374 * Enhanced decoding of struct sigevent.
375 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
376 and v4l2 ioctl syscall arguments.
377 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
378 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
379 sendfile, setsockopt, and shmctl syscalls.
380 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
381 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
382 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
383 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
384 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
385 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
387 * Added Nios II architecture support.
388 * Added new syscall entries to match Linux 4.4.
391 * Fixed potential short read of strings from tracee's memory.
392 * Fixed -qq option in conjunction with -o option.
393 * Fixed filtering of <unavailable> syscalls.
394 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
395 with 64-bit aligned structures.
396 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
397 syscall flags arguments.
398 * Fixed decoding of 4th argument of clock_nanosleep syscall.
399 * Fixed decoding of getpagesize syscall on m68k.
400 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
401 * Fixed decoding of timezone argument of gettimeofday and settimeofday
403 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
405 * Fixed decoding of pipe syscall on alpha and mips.
406 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
407 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
408 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
410 * Fixed decoding of 4th argument of semctl indirect syscall.
411 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
412 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
413 * Fixed decoding of struct dirent on x32.
414 * Fixed decoding of times syscall return value on mips n32 and x32.
415 * Fixed decoding of path argument of umount2 syscall
416 (addresses Debian bug #785050).
417 * Worked around a kernel bug in tracing privileged executables.
418 * Fixed various errors in mapping between syscall numbers and associated
419 information like the number of syscall arguments, the name of syscall,
422 Noteworthy changes in release 4.10 (2015-03-06)
423 ===============================================
426 * Added -yy option to print protocol and address information associated with
428 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
429 recvmsg, sendmmsg, and recvmmsg syscalls.
430 * Implemented full 32-bit decoding of ioctl commands
431 (addresses Debian bug #692913 and Fedora bug #902788).
432 * Implemented PTRACE_GETREGS API support on ia64.
433 * Implemented PTRACE_GETREGS API support on mips.
434 * Implemented PTRACE_GETREGSET API support on s390/s390x.
435 * Implemented decoding of getrandom and seccomp syscalls.
436 * Implemented full decoding of 64-bit capability sets.
437 * Implemented decoding of all prctl commands.
438 * Implemented decoding of parametrized ioctl commands.
439 * Implemented decoding of evdev ioctl commands.
440 * Implemented decoding of v4l ioctl commands.
441 * Implemented decoding of SG_IO v4 ioctl commands.
442 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
443 * Implemented decoding of FALLOC_FL_* fallocate flags.
444 * Implemented decoding of rt_sigreturn signal mask on aarch64,
446 * Enhanced socket decoder to support bluetooth sockets.
447 * Enhanced decoding of unlisted ioctl commands.
448 * Enhanced decoding of getsockopt and setsockopt syscall.
449 * Enhanced decoding of sysinfo syscall.
450 * Enhanced decoding of struct cmsghdr.
451 * Enhanced decoding of wait status.
452 * Enhanced aio support on non-x86 architectures by using external libaio.h.
453 * Added O_TMPFILE to the list of recognized open mode flags.
454 * Updated the list of filesystem type constants that is used in decoding
455 statfs family syscalls.
456 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
458 * Updated lists of signal constants from Linux 3.19.
459 * Updated lists of errno constants from Linux 3.19.
460 * Updated lists of ioctl commands from Linux 3.9.
461 * Added new syscall entries to match Linux 3.19.
464 * Fixed various errors in mapping between syscall numbers and associated
465 information like the number of syscall arguments, the name of syscall,
467 * Fixed quoting issues in printing descriptors, filenames, network interface
468 names, struct utsname members, device/volume names of BLK* ioctl commands.
469 * Fixed uid_t/git_t decoding.
470 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
471 * Fixed potential open flags truncation on some architectures.
472 * Fixed decoding of struct ifreq.ifr_name.
473 * Fixed decoding of SIOCSIFNAME ioctl command.
474 * Fixed decoding of RENAME_* renameat2 flags.
475 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
476 * Fixed decoding of indirect ipc subcalls on some architectures.
477 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
478 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
479 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
480 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
481 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
482 sparc, sparc64, mips, and s390.
483 * Fixed instruction pointer output (-i option) on architectures that support
484 several personalities.
485 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
487 * Fixed build on systems where struct sigaction has no sa_restorer member.
488 * Fixed build with uclibc and musl libc.
491 * Linux kernel >= 2.5.46 is required.
492 Older versions without a decent PTRACE_SETOPTIONS support will not work.
493 * On mips, linux kernel >= 2.6.15 is required.
494 Older versions without a decent PTRACE_GETREGS support will not work.
495 * On s390 and s390x, linux kernel >= 2.6.27 is required.
496 Older versions without a decent PTRACE_GETREGSET support will not work.
498 Noteworthy changes in release 4.9 (2014-08-15)
499 ==============================================
501 * Changes in behavior
502 * Disabled OABI support on ARM EABI systems by default,
503 added --enable-arm-oabi option to enable it at configure time.
506 * Added experimental -k option to print stack trace after each traced syscall.
507 * Added -w option to produce stats on syscall latency.
508 (addresses Debian bug #457497).
509 * Added ARC architecture support.
510 * Added PTRACE_GETREGS API support on PowerPC.
511 * Enhanced Bionic libc and musl libc support.
512 * Enhanced tracing of x86 personality processes on x86_64 and x32.
513 * Enhanced tracing of ARM personality processes on AArch64.
514 * Enhanced 32/64bit personality detection on PowerPC.
515 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
516 renameat2, and request_key syscalls.
517 * Robustified decoding of select, pselect, and io_submit syscalls.
518 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
519 setdomainname, sethostname, setns, and sync_file_range syscalls.
520 * Enhanced decoding of signal bitmasks.
521 * Enhanced decoding of file descriptors.
522 * Enhanced siginfo_t decoding.
523 * Enhanced PF_NETLINK decoding.
524 * Updated CLOCK_* constants
525 (addresses Fedora bug #1088455).
526 * Added new syscall entries to match Linux 3.16.
529 * Added shmat and shmdt to the set of memory mapping related syscalls.
530 * Fixed detaching from stopped processes.
531 * Fixed fanotify_mark decoding on 32bit architectures.
532 * Fixed offset decoding in preadv and pwritev syscalls.
533 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
534 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
535 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
536 (addresses Fedora bug #993384).
537 * Miscellaneous corrections in the manual page.
538 (Addresses Debian bug #725987).
540 Noteworthy changes in release 4.8 (2013-06-03)
541 ==============================================
543 * Changes in behavior
544 * In case of normal strace termination, when the trace output is
545 redirected to a pipe, strace now closes it and waits for the pipe
546 process termination before exit.
549 * Implemented tracing using PTRACE_SEIZE API (when available).
550 * Implemented more reliable PTRACE_GETREGSET-based process personality
551 detection on x86-64 and x32 (when available).
552 * Added -e trace=memory option for tracing memory mapping related syscalls.
553 * Documented -b option.
554 * Allowed exit status messages to be suppressed by giving -q option twice.
555 * Added AArch64 architecture support
556 (addresses Debian bug #693074 and Fedora bug #969858).
557 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
558 * Added tilegx personality support for Tile.
559 * Enhanced support of NOMMU architectures.
560 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
562 * Added new syscall entries to match Linux 3.9.
563 * Regenerated the list of common ioctl names from Linux 3.9.
564 * Updated the list of errno constants.
565 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
566 PTRACE_O_*, and TCP_* constants.
567 * Implemented decoding of UBI ioctls.
568 * Removed redundant "*32" ioctl names.
571 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
572 (addresses Fedora bug #659382).
573 * Fixed kernel release string parsing
574 (addresses Debian bug #702309).
575 * Fixed decoding of *xattr syscalls
576 (addresses Fedora bug #885233).
577 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
578 (addresses Fedora bug #912790).
579 * Fixed tracing forks on SPARC.
580 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
581 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
582 and truncate64 syscalls.
583 * Fixed categories of multiple syscalls on most of supported architectures.
584 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
585 * Fixed decoding of multiple 32-bit personality syscalls on x32.
586 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
587 S390x, and Tile architectures.
588 * Fixed semtimedop decoding on S390x.
589 * Fixed sram_alloc decoding on Blackfin.
590 * Fixed build when process_vm_readv is a stab.
591 * Fixed build with older versions of libaio.h.
593 Noteworthy changes in release 4.7 (2012-05-02)
594 ==============================================
596 * Changes in behavior
597 * strace no longer suspends waitpid until there is a child
598 for waitpid'ing process to collect status from.
599 * strace no longer detaches from a tracee which is supposed
601 * strace now issues a new message: "+++ exited with EXITCODE +++"
602 which shows exact moment strace got exit notification,
603 analogous to existing "+++ killed by SIG +++" message.
606 * Added x32 personality support (x86_64 architecture).
607 * Added -y and -P options to print file descriptor paths and
608 filter by those paths.
609 * Added -I option to control strace interactivity.
610 * Allowed -p option to take comma or whitespace-separated list of PIDs.
611 * Added strace_log_merge script helper to merge timestamped "strace -ff"
613 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
614 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
615 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
616 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
617 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
618 listxattr, setrlimit and swapon syscalls.
619 * Implemented decoding of loop and mtd ioctls.
620 * Added syscall entries for new linux syscalls.
621 * Added syscall entries for direct socket system calls on powerpc.
622 * Updated the list of errno constants.
623 * Updated lists of MSG_*, STA_*, and TCP_* constants.
624 * Regenerated the list of ioctl names from Linux 3.3.
625 * Enhanced switching between processes with different personalities.
626 * Enhanced signals reporting by using short signal names.
627 * Made ERESTART* messages more descriptive.
628 * Made parsing of numbers from strings more robust.
629 * Added support for compat_statfs64 and statfs64.f_flags.
630 * Changed read of data blocks to use single process_vm_readv syscall
631 (when available) instead of several PTRACE_PEEKDATA operations.
632 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
633 operation instead of several PTRACE_PEEKUSER operations.
634 * Applied various optimizations to make strace work faster.
637 * Implemented proper handling of real SIGTRAPs on kernels supporting
638 PTRACE_O_TRACESYSGOOD.
639 (Addresses Fedora bug #162774).
640 * Fixed sockaddr_un.sun_path name in decoded output.
641 (Addresses Debian bug #554946).
642 * Fixed to avoid potential core file clobbering on exit.
643 (Addresses Debian bug #656398).
644 * Fixed a typo in documentation.
645 (Addresses Debian bug #653309).
646 * Fixed decoding of timer id returned by timer_create.
647 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
648 * Fixed *at syscalls flags decoding.
649 * Fixed ARM EABI 64-bit syscall's arguments decoding.
650 * Fixed semtimedop decoding on s390.
651 * Fixed osf_sigprocmask decoding on alpha.
652 * Fixed ipc and socket subcall decoding on several architectures.
653 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
654 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
655 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
656 * Corrected io_* syscall entries on ARM.
657 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
658 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
659 * Fixed build when libaio-devel is not available.
660 * Fixed configure checks for PTRACE_* constants.
661 * Fixed compilation warnings remained on several architectures.
664 * Removed all non-Linux code. After years of neglect, that dead code
665 just hampered further strace development.
666 * Linux kernel >= 2.6.18 is recommended. Older versions might still
667 work but they haven't been thoroughly tested with this release.
669 Noteworthy changes in release 4.6 (2011-03-15)
670 ==============================================
672 * Changes in behavior
673 * Print diagnostic information about changes in personality mode to
674 standard error instead of standard output.
677 * Implemented a new method of following clone, fork, and vfork
678 syscalls using the Linux kernel's explicit facilities for tracing
679 creation of threads and child processes.
680 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
681 * Implemented decoding of TLS syscalls on m68k.
682 * Implemented biarch support on powerpc64.
683 * Implemented biarch support for getrlimit() and setrlimit().
684 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
685 * Implemented SOL_SCTP socket options decoding.
686 * Added HDIO_* ioctl names.
687 (Addresses Debian bug #450953).
688 * Added LOOP_* ioctl names.
689 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
690 to match Linux 2.6.37.
691 * Updated the list of IPPROTO_* constants to match netinet/in.h.
692 * Implemented decoding of HDIO_* and BLK* ioctls.
693 * Added MicroBlaze architecture support.
694 * Added new syscall entries to match Linux 2.6.37.
695 * Regenerated list of ioctl names from Linux 2.6.37.
696 * Enhanced signal notification decoding.
697 * Documented -C and -D options.
700 * Fixed fetching syscall arguments on m68k.
701 * Fixed an error when judging whether a process has children.
702 * Fixed get/set_robust_list syscall numbers for powerpc.
703 * Fixed a corner case in printing clone flags.
704 * Fixed cross-compiling issues.
705 * Fixed build issues on powerpc64, SH and SPARC.
706 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
707 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
708 fanotify_init, and fanotify_mark syscalls.
709 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
710 * Fixed biarch support in IO dumping.
711 * Fixed raw exit_group decoding.
712 * Fixed decoding of file descriptors on 64-bit architectures.
713 * Fixed a corner case in waitpid handling.
714 (Addresses Red Hat bug #663547).
715 * Fixed stat64 decoding on mips
716 (Addresses Debian bug #599028).
717 * Fixed misleading italics in the manual page.
718 (Addresses Debian bug #589323).
720 Noteworthy changes in release 4.5.20 (2010-04-13)
721 =================================================
724 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
725 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
726 rt_tgsigqueueinfo, perf_event_open.
727 * Enhanced decoding of recently added syscalls on non-x86 architectures
728 by replacing a bare decoder with elaborate parsers enabled earlier
730 * Implemented -C option to combine regular and -c output.
731 (Addresses Debian bug #466196)
732 * Enhanced decoding of mbind and mremap syscalls.
733 * Enhanced SOL_PACKET socket options decoding.
734 * Regenerated list of ioctl names from linux 2.6.33.
735 * Added TILE architecture support.
738 * Fixed build with Linux kernel headers 2.6.32-rc5+.
739 (Addresses Debian bug #560516 and Fedora bug #539044)
740 * Fixed build on mips.
741 * Fixed handling of Linux systems without struct statfs64.
742 * Fixed reporting signal mask by sigreturn on powerpc.
743 * Fixed potential stack buffer overflow in select decoder.
744 (Addresses Fedora bug #556678)
745 * Corrected msgsnd indirect ipccall decoding.
746 * Corrected decoding of 64bit syscalls.
747 (Addresses Debian bug #570603)
748 * Corrected getsockopt decoding on architectures where
749 sizeof(long) > sizeof(int).
750 (Addresses Debian bug #494844)
751 * Corrected decoding of epoll_pwait.
752 (Addresses Debian bug #513014)
753 * Corrected handling of killed threads.
755 Noteworthy changes in release 4.5.19 (2009-10-21)
756 =================================================
758 * Changes in behavior
759 * When command exits, strace now exits with the same exit status.
760 If command is terminated by a signal, strace terminates itself
761 with the same signal, so that strace can be used as a wrapper
762 process transparent to the invoking parent process.
763 When using -p option, the exit status of strace is zero unless
764 there was an unexpected error in doing the tracing.
765 (Addresses Fedora bug #105371 and Debian bug #37665)
768 * Implemented decoding of new Linux syscalls: accept4, dup3,
769 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
770 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
771 * Implemented decoding of accept4 socketcall.
772 * Enhanced prctl decoding.
773 * Enhanced nanosleep decoding.
774 * Enhanced ptrace decoding.
775 * Enhanced futex decoding.
776 * Enhanced CAP_* decoding.
777 * Enhanced SIOCS* ioctls decoding.
778 * Enhanced fcntl F_* flags decoding.
779 * Enhanced semop/semtimedop decoding.
780 * Updated ARM architecture support.
781 * Added Blackfin architecture support.
782 * Added AVR32 architecture support.
783 * Added CRIS architecture support.
784 * Made strace detect when traced process suddenly disappeared.
787 * Fixed syscall numbers for tee and sync_file_range.
788 (Addresses Debian bug #503124)
789 * Fixed several bugs in strings decoder, including potential heap
791 (Addresses Fedora bugs #470529, #478324 and #511035)
792 * Marked sendfile(2) as a network syscall.
793 (Addresses Debian bug #509499)
794 * Fixed accept(2) decoding.
795 (Addresses Debian bug #507573)
796 * Fixed sigtimedwait(2) decoding.
797 * Fixed build on ARM EABI.
798 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
799 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
800 (Addresses Red Hat bug #471169)
801 * Fixed display of 32-bit argv array on 64-bit architectures.
802 (Addresses Fedora bug #519480)
803 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
804 * Fixed HPPA architecture support.
805 (Addresses Debian bugs #437928 and #546619)
810 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
811 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
816 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
817 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
818 * Improved output for prctl system call on Linux.
819 * Improved support for Linux/ARM.
820 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
825 * Improved output for delete_module, futex, and mbind system calls on Linux.
826 * Improved output for SG_IO ioctls on Linux.
827 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
828 eventfd, getcpu, epoll_pwait.
833 * Several biarch improvements.
834 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
835 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
840 * Accept numeric system calls in -e.
845 * Introduce "-e trace=desc".
850 * Better x86-64 support for IA32 processes.
851 * Update PowerPC system calls.
852 * Better printing for Linux aio system calls.
856 * Quick fix release for build issues.
857 * One fix for Linux/ARM system call table.
862 * Print fault address for SIGSEGV/SIGBUS signals when available.
867 * Improve socket ioctl printing.
868 * Update Linux/IA64 syscall list.
869 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
870 * Improve mount flags printing.
871 * Support symbolic printing of x86_64 arch_prctl parameters.
876 * Update syscall tables for Alpha, ARM, HPPA.
877 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
878 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
879 * Improve ioctl command name matching.
880 * Print RTC_* ioctl structure contents.
881 * Support newer RLIMIT_* values.
882 * Print struct cmsghdr details in sendmsg.
887 * Print attribute values in *xattr system calls on Linux.
888 * Include pread and pwrite calls in -e read and -e write tracing.
889 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
890 * Print clock_t values symbolically in Linux clock_* system calls.
894 * Bug fixes, Linux ioctl updates.
895 * David Miller contributed support for Linux/SPARC64.
903 * Update Linux ioctl lists.
904 * Update PF_* and AF_* value lists.
905 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
910 * On Linux using NPTL threads, -p will now attach to all threads in a process.
911 * Handle new mq_* system calls in Linux 2.6.6 and later.
916 * Report some new VM_* bit values on Linux.
917 * Better output for Linux sched_* system calls.
922 * Display multiple ioctl name matches on Linux.
926 * New port to AMD's x86-64 architecture. One strace binary can
927 handle both new x86-64 and old i386 processes.
928 * Fixed support for LFS64 calls.
929 * New switch -E to add/remove environment variables for the command.
930 * Merged s390/s390x port.
931 * Trace an unbounded number of processes.
932 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
933 * Fixed bugs with attach/detach leaving things stopped.
934 * Fixed traced process seeing ECHILD despite live, traced children
935 in waitpid calls with WNOHANG.
936 * Stuart Menefy contributed a port to Linux/SH.
937 * Stephen Thomas contributed a port to Linux/SH64.
938 * Many other bug fixes.
942 * Fix Linux/ia64 support, looks like someone renamed a few things on us
943 * Fix the ioctl setup for Linux, turned out it did not really work.
944 Improve the ioctl extractor as well so we decode some more ones.
948 * compile fixes for Linux/mips
952 * Linux ia64 and hppa ports added
953 * The usual Linux syscall updates (includes 32bit uid/gid support),
954 * Linux ioctl list updated
955 * Support IPv6 scope ids
956 * FreeBSD/i386 port added
957 * UnixWare and Solaris updates
958 * Better support for tracing multithreaded processes in Linux
962 * Compiles on glibc2.0 systems again
963 * Linux/S390 port added
964 * The usual Linux syscall updates
965 * we can follow fork on arm now
969 * Linux/MIPS port added
970 * Lots of Linux updates again
971 * Improved IPv6 support
977 * Compiles on glibc2.0 systems again
981 * Get stat structure properly on Linux 64bit archs
982 * Personalities work again
983 * Compile correctly on SunOS again
989 * Linux (ultra)sparc fixes
996 * add support for more Linux architectures (powerpc, sparc, arm)
997 * support lots more Linux syscalls
998 * fix signal handling
999 * add IPX and IPIP support
1000 * check stray syscall after execv
1001 * fix hanging children
1003 Changes in version 3.1
1004 ======================
1006 * Irix5 is supported
1007 * Linux 68k is supported
1008 * Linux alpha is supported
1009 * configure is upgraded to autoconf 2.x
1010 * using -f in combination with -e now works correctly
1011 * output can be piped to a program
1012 * tracing setuid programs works better
1013 * it is now reasonable to install strace setuid to root in some circumstances
1014 * new useful tracing names like file and process to trace whole
1015 classes of system calls, e.g. -efile traces all system calls that
1016 take a file name as an argument
1017 * IPC calls on SunOS 4.1.x are decoded
1018 * Linux program memory is reliably dereferenced
1019 * Linux decodes at least the name of all syscalls as of pre2.0.4
1020 * various cosmetic changes and bug fixes
1022 Changes from versions 2.x to version 3.0
1023 ========================================
1025 * filename arguments are neither abbreviated nor stringified
1026 * string arguments are now true C strings using octal instead of hex by default
1027 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
1028 * by default the output for multiple processes now goes into one file
1029 * all structures, vectors, bitsets, etc. use consistent output formats
1030 * the -c option now means count calls, -i does what the old -c used to do
1032 New Features in version 3.0
1033 ===========================
1035 * non-ascii strings can be optionally printed entirely in hex
1036 * the output format is readable when multiple processes are generating output
1037 * exit values are printed in an alignment column
1038 * is is possible to suppress messages about attaching and detaching
1039 * various tracing features can be enabled on a per syscall/signal/desc basis
1040 * selective tracing of syscalls
1041 * selective printing of syscall structures
1042 * selective abbreviation of long structures on a per syscall basis
1043 * selective printing of raw syscall arguments and results
1044 * selective tracing of signals
1045 * selective dumping of all I/O read from file descriptors
1046 * selective dumping of all I/O written to file descriptors
1047 * optional counting of time, calls, and errors for each syscall
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