1 Noteworthy changes in release ?.?? (????-??-??)
2 ===============================================
5 * Updated lists of MADV_*, SO_*, SOL_* and TCP_* constants.
7 Noteworthy changes in release 4.19 (2017-09-05)
8 ===============================================
10 * Changes in behaviour
11 * Changed formatting of personality names on tile architecture in order
12 to make it in line with other multi-personality architectures.
13 * Changed field output order in struct v4l2_requestbuffers to improve in/out
15 * Changed handling of multiple signal= specifications in an injection
16 expression: multiple specification now leads to error instead of implicit
17 usage the last specification.
20 * Enhanced decoding of optlen argument of getsockopt syscall.
21 * Enhanced decoding of SO_LINGER option of getsockopt and setsockopt syscalls.
22 * Enhanced decoding of SO_PEERCRED option of getsockopt syscall.
23 * Enhanced decoding of IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP,
24 IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_JOIN_ANYCAST,
25 IPV6_LEAVE_ANYCAST, MCAST_JOIN_GROUP, and MCAST_LEAVE_GROUP options
26 of setsockopt syscall.
27 * Enhanced decoding of KEYCTL_DH_COMPUTE operation of keyctl syscall
28 (KDF parameters decoding).
29 * Implemented decoding of KEYCTL_RESTRICT_KEYRING operation of keyctl syscall.
30 * Enhanced decoding of UFFDIO_API ioctl command.
31 * Enhanced decoding of BPF_PROG_LOAD, BPF_MAP_CREATE, BPF_MAP_LOOKUP_ELEM,
32 and BPF_MAP_GET_NEXT_KEY commands of bpf syscall.
33 * Implemented decoding of linux socket filter programs specified
34 for SO_ATTACH_FILTER and SO_ATTACH_REUSEPORT_CBPF socket options.
35 * Implemented decoding of inet_diag_req_v2, inet_diag_req_compat,
36 packet_diag_msg, and smc_diag_msg netlink attributes of NETLINK_SOCK_DIAG.
37 * Implemented NETLINK_SELINUX protocol specific decoding.
38 * Implemented decoding of netlink message ack flags.
39 * Implemented decoding of nlmsgerr netlink attributes.
40 * Implemented basic protocol specific decoding of NETLINK_CRYPTO.
41 * Implemented decoding of crypto_user_alg netlink attributes
43 * Implemented basic protocol specific decoding of addr, addrlabel, dcb, link,
44 mdb, neigh, neightbl, netconf, nsid, route, rule, tc, and tca messages
46 * Implemented decoding of NETLINK_KOBJECT_UEVENT messages.
47 * Improved handling of unexpected tracees (the ones that cloned with
48 CLONE_PARENT/CLONE_PTRACE or called PTRACE_TRACEME on themselves): they
49 are now PTRACE_DETACH'ed instead of PTRACE_CONT'ed.
50 * Updated lists of BPF_*, KEY_*, RWF_*, SCM_*, SO_*, and *_MAGIC constants.
51 * Added decoding of arch_prctl syscall on x86.
52 * Added decoding of seccomp, bpf, userfaultfd, membarrier, mlock2,
53 copy_file_range, preadv2, pwritev2, and statx on alpha.
54 * Added decoding of statx syscall on microblaze.
55 * Added decoding of s390_guarded_storage syscall on s390.
56 * Updated lists of ioctl commands from Linux 4.13.
57 * Enhanced manual page.
60 * Fixed printing of group_req structure on non-native personalities.
61 * Fixed output formatting of blkpg_ioctl_arg, dm_name_list, and iocb
63 * Fixed formatting of nul-terminated strings which have kernel-imposed size
65 * Fixed printing of paths that hit PATM_MAX limit in order to match kernel's
67 * Fixed build warnings on Android mips64.
68 * Fixed unused function "is_negated_errno" build warning when built
70 * Fixed syscall number and arguments retrieval behaviour on sparc64 and
71 mips o32 after prctl(PR_SET_DUMPABLE, 0) makes PTRACE_PEEKTEXT impossible
72 to use if Linux kernel has commit v4.10-rc1~114^2~2.
73 * Fixed path tracing for execveat, symlink, symlinkat, inotify_add_watch,
74 and inotify_init syscalls.
75 * Fixed personality switch printing on sparc64 and risc-v.
77 Noteworthy changes in release 4.18 (2017-07-05)
78 ===============================================
81 * Implemented decoding of SCM_TIMESTAMP* control messages.
82 * Implemented decoding of netlink NLMSG_DONE messages.
83 * Implemented decoding of netlink generic nlmsg_type and nlmsg_flags.
84 * Implemented decoding of NETLINK_AUDIT, NETLINK_NETFILTER, NETLINK_ROUTE,
85 NETLINK_SELINUX, NETLINK_SOCK_DIAG, and NETLINK_XFRM message types.
86 * Implemented decoding of NETLINK_GENERIC protocol families.
87 * Implemented basic protocol specific decoding of AF_INET, AF_INET6,
88 AF_NETLINK, AF_PACKET, AF_SMC, and AF_UNIX messages of NETLINK_SOCK_DIAG.
89 * Implemented basic decoding of netlink attributes.
90 * Implemented basic protocol specific decoding of AF_INET, AF_NETLINK,
91 AF_PACKET, AF_SMC, and AF_UNIX netlink attributes of NETLINK_SOCK_DIAG.
92 * Implemented decoding of inet_diag_msg, netlink_diag_msg, and unix_diag_msg
93 netlink attributes of NETLINK_SOCK_DIAG.
94 * Updated lists of ARPHRD_*, KEYCTL_*, NDIAG_SHOW_*, RTM_*, SCM_*, SCTP_*,
95 SO_*, V4L2_*, and prctl ARCH_* constants.
96 * Updated lists of ioctl commands from Linux 4.12.
99 * In interactive mode (-I2), those signals that were blocked at startup
100 will remain blocked for the whole period of strace execution.
101 * strace no longer resets SIGCHLD handler in tracees to the default action.
102 * When traced command is terminated by a blocked signal, strace unblocks
103 that signal to ensure its own termination with the same signal.
104 * Fixed corner cases in decoding of old sigaction syscall.
105 * Fixed build with old kernel headers on mips.
106 * Fixed build on aarch64 and tile with glibc >= 2.26.
107 * Fixed build on arc and nios2.
109 Noteworthy changes in release 4.17 (2017-05-24)
110 ===============================================
112 * Changes in command line syntax
113 * Syscall classes specified in -e trace= option now have % prefix (like
114 -e trace=%process). Old style class names without leading % are still
115 supported, but considered deprecated now.
118 * Optimized syscall filtering.
119 * Improved representation of timestamps.
120 * Enhanced decoding of sched_setattr syscall.
121 * Added -e trace=%stat option for tracing variants of stat syscall.
122 * Added -e trace=%lstat option for tracing variants of lstat syscall.
123 * Added -e trace=%fstat option for tracing variants of fstat and fstatat
125 * Added -e trace=%%stat option for tracing syscalls used for querying file
126 status information (stat, lstat, fstat, fstatat, statx, and their
128 * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs
130 * Added -e trace=%fstatfs option for tracing fstatfs, fstatfs64 and fstatvfs
132 * Added -e trace=%%statfs option for tracing syscalls used for querying file
133 system statistics information (statfs-like, fstatfs-like and ustat).
134 * Added -e trace=/regex option for filtering syscalls using regular
136 * Added support for prepending of question mark before syscall qualification
137 in -e trace expressions in order to suppress error in case no syscalls
138 matched the provided qualification.
139 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
140 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
141 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
143 * Implemented decoding of statx syscall.
144 * Implemented decoding of NS_* ioctl commands.
145 * Implemented decoding of the remaining V4L2_BUF_TYPE_* types.
146 * Implemented decoding of VIDIOC_[SG]_TUNER ioctl commands.
147 * Implemented decoding of NLMSG_ERROR netlink messages.
148 * Improved decoding of BPF_PROG_ATTACH command of bpf syscall.
149 * Improved decoding of misplaced parts in DM_* ioctl commands.
150 * Updated lists of ioctl commands from Linux 4.11.
153 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
154 * Fixed the number of arguments and tracing flags of alpha specific syscalls.
155 * Fixed decoding of old sigsuspend syscall on alpha, cris, mips, powerpc,
156 powerpc64, sh, sh64, sparc, and sparc64.
157 * Fixed decoding of sgetmask and ssetmask syscalls on 64-bit architectures.
158 * Fixed decoding of netlink messages received within struct msghdr.
159 * Worked around a bug in miscompiled aarch64 kernels leading to the 3rd
160 argument of sched_getattr syscall being not quite 32-bit.
161 * Fixed corner cases of printing inaccessible times argument of utimes
162 and futimesat syscalls.
164 Noteworthy changes in release 4.16 (2017-02-14)
165 ===============================================
168 * Implemented syscall return value injection (-e inject=SET:retval= option).
169 * Implemented signal injection (-e inject=SET:signal= option).
170 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
171 * Implemented decoding of all SG_* ioctl commands.
172 * Implemented decoding of ustat syscall.
173 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
174 and BPF_PROG_DETACH commands of bpf syscall.
175 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
176 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
178 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
179 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
180 * Updated lists of ioctl commands from Linux 4.10.
181 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
185 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
186 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
187 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
188 and pwritev* syscalls on x32.
189 * Fixed printing of string arguments of getxattr and setxattr syscalls
190 when -s option is used to limit the printed string size.
191 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
193 * Fixed decoding of SG_* and LOOP_* ioctl commands.
194 * Fixed build on mips with musl libc.
195 * Fixed cross-building of ioctlsort.
196 * Applied minor formatting fixes to the manual page.
198 Noteworthy changes in release 4.15 (2016-12-14)
199 ===============================================
201 * Changes in behavior
202 * Time stamps are now printed according to ISO 8601.
203 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
204 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
205 syscalls is now formatted as an array.
208 * Implemented syscall fault injection (-e fault=... option).
209 * Implemented decoding of DM_* ioctl commands.
210 * Implemented decoding of attr parameter of perf_event_open syscall.
211 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
212 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
213 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
215 * Implemented PTRACE_GETREGS API support on m68k.
216 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
217 and V4L2_* constants.
218 * Updated lists of ioctl commands from Linux 4.9.
219 * Added decoding of recently added syscalls on arc, x32, and xtensa.
220 * Enhanced manual page.
223 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
224 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
225 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
226 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
227 setgroups, setns, unshare, and utimes syscalls.
228 * Fixed handling of verbose flag in printing of controls array
229 of struct v4l2_ext_controls.
230 * Fixed omission of field names in the output of capability, sigaction,
231 sigevent, statfs, timespec, timeval, and utimbuf structures.
232 * Fixed printing of unknown syscalls in siginfo structure.
233 * Fixed decoding of ioctl constants on m68k.
234 * Fixed cris architecture support.
235 * Fixed cross build when host compiler does not support the same
236 set of warning flags as the cross compiler.
237 * Fixed build on SLE10 and SLE11.
239 Noteworthy changes in release 4.14 (2016-10-04)
240 ===============================================
242 * Changes in behavior
243 * When using -p option without a command and no processes has been attached,
244 strace exits with exit status 1.
247 * Added printing of the mode argument of open and openat syscalls
248 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
249 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
250 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
251 and aio family syscalls.
252 * Implemented fetching of the 7th subcall argument on mips o32.
253 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
255 * Updated lists of ioctl commands from Linux 4.8.
256 * Added decoding of new syscalls on sh and sh64.
257 * Added RISC-V architecture support.
260 * Marked io_setup and io_destroy as memory mapping related syscalls.
261 * Fixed leakage of placeholder descriptors to tracees.
262 * Fixed printing of mode_t, umode_t, and umask types.
263 * Fixed decoding of iovec arrays without a limit on total data size.
264 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
265 and ipc family syscalls.
266 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
267 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
269 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
270 * Fixed decoding of struct stat64 on sparc64.
271 * Fixed decoding of uid and gid-related syscalls on sparc64.
272 * Fixed decoding of the forth argument of semctl syscall on sparc64.
273 * Fixed values of tty ioctl constants on sparc64.
274 * Fixed sparc personality support on sparc64.
276 Noteworthy changes in release 4.13 (2016-07-26)
277 ===============================================
280 * Implemented a general netlink socket parser.
281 * Enhanced decoding of socket addresses.
282 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
283 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
284 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
285 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
286 and *_MAGIC constants.
287 * Updated lists of ioctl commands from Linux 4.7.
290 * Fixed decoding of pid_t argument of prlimit64 syscall.
291 * Fixed sign extension issues in the parser of struct rusage.
292 * Fixed race condition in decoding of timeout argument of recvmmsg and
293 rt_sigtimedwait syscalls.
294 * Fixed build with fresh linux kernel headers.
296 Noteworthy changes in release 4.12 (2016-05-31)
297 ===============================================
300 * Implemented simultaneous use of -p option and tracing of a command.
301 (addresses Debian bug #549942).
302 * Implemented caching of netlink conversations to reduce amount of time
303 spent in decoding socket details in -yy mode.
304 * Implemented -yy mode decoding of protocol:portid pairs associated with
305 netlink socket descriptors.
306 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
307 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
309 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
310 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
311 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
312 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
313 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
314 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
315 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
316 statfs64, tgkill, waitid, and xattr family syscalls.
317 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
318 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
319 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
320 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
321 * Added decoding of fadvise64 and fadvise64_64 on s390.
322 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
323 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
324 * Updated lists of ioctl commands from Linux 4.6.
327 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
328 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
329 * Fixed decoding of mlock2 syscall on sparc.
330 * Fixed decoding of osf_shmat syscall on alpha.
331 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
332 (addresses Debian bug #485979 and Fedora bug #1298294).
333 * Fixed decoding of preadv syscall in case of short read.
334 * Fixed decoding and dumping of readv syscall in case of short read.
335 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
336 * Fixed decoding of mincore syscall's last argument.
337 * Fixed remaining errors in mapping between syscall numbers and numbers
338 of syscall arguments.
339 * Applied various fixes to strace-graph script.
341 Noteworthy changes in release 4.11 (2015-12-21)
342 ===============================================
344 * Changes in behavior
345 * Some syscalls have different names depending on architecture and
346 personality. In these cases, syscall filtering and printing now
347 consistently uses the names that match corresponding __NR_* kernel
348 macros of the tracee's architecture and personality.
349 * Added strace prefix to all diagnostic messages.
352 * Enhanced and extended test suite.
353 * Implemented reliable tracing of processes whose personality differs
354 from the personality of strace, fixed decoding of 32-bit personality
355 syscalls on 64-bit architectures.
356 * When some data referenced by syscall arguments is irrelevant or cannot
357 be read from tracee's memory, strace now prints its address consistently.
358 * When a syscall is restarted using restart_syscall mechanism, strace now
359 shows the syscall name on architectures that expose this information.
360 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
361 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
362 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
363 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
364 * Optimized decoding of indirect socket syscalls.
365 * Implemented decoding of nanoseconds along with seconds in stat family
366 syscalls (addresses Fedora bug #1251176).
367 * Implemented decoding of struct statfs.f_flags in statfs syscall.
368 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
370 * Implemented decoding of indirect syscall on mips o32.
371 * Implemented decoding of IPPROTO_IP control messages.
372 * Implemented decoding of setsockopt syscall multicast arguments.
373 * Enhanced decoding of struct sigevent.
374 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
375 and v4l2 ioctl syscall arguments.
376 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
377 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
378 sendfile, setsockopt, and shmctl syscalls.
379 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
380 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
381 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
382 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
383 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
384 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
386 * Added Nios II architecture support.
387 * Added new syscall entries to match Linux 4.4.
390 * Fixed potential short read of strings from tracee's memory.
391 * Fixed -qq option in conjunction with -o option.
392 * Fixed filtering of <unavailable> syscalls.
393 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
394 with 64-bit aligned structures.
395 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
396 syscall flags arguments.
397 * Fixed decoding of 4th argument of clock_nanosleep syscall.
398 * Fixed decoding of getpagesize syscall on m68k.
399 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
400 * Fixed decoding of timezone argument of gettimeofday and settimeofday
402 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
404 * Fixed decoding of pipe syscall on alpha and mips.
405 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
406 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
407 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
409 * Fixed decoding of 4th argument of semctl indirect syscall.
410 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
411 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
412 * Fixed decoding of struct dirent on x32.
413 * Fixed decoding of times syscall return value on mips n32 and x32.
414 * Fixed decoding of path argument of umount2 syscall
415 (addresses Debian bug #785050).
416 * Worked around a kernel bug in tracing privileged executables.
417 * Fixed various errors in mapping between syscall numbers and associated
418 information like the number of syscall arguments, the name of syscall,
421 Noteworthy changes in release 4.10 (2015-03-06)
422 ===============================================
425 * Added -yy option to print protocol and address information associated with
427 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
428 recvmsg, sendmmsg, and recvmmsg syscalls.
429 * Implemented full 32-bit decoding of ioctl commands
430 (addresses Debian bug #692913 and Fedora bug #902788).
431 * Implemented PTRACE_GETREGS API support on ia64.
432 * Implemented PTRACE_GETREGS API support on mips.
433 * Implemented PTRACE_GETREGSET API support on s390/s390x.
434 * Implemented decoding of getrandom and seccomp syscalls.
435 * Implemented full decoding of 64-bit capability sets.
436 * Implemented decoding of all prctl commands.
437 * Implemented decoding of parametrized ioctl commands.
438 * Implemented decoding of evdev ioctl commands.
439 * Implemented decoding of v4l ioctl commands.
440 * Implemented decoding of SG_IO v4 ioctl commands.
441 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
442 * Implemented decoding of FALLOC_FL_* fallocate flags.
443 * Implemented decoding of rt_sigreturn signal mask on aarch64,
445 * Enhanced socket decoder to support bluetooth sockets.
446 * Enhanced decoding of unlisted ioctl commands.
447 * Enhanced decoding of getsockopt and setsockopt syscall.
448 * Enhanced decoding of sysinfo syscall.
449 * Enhanced decoding of struct cmsghdr.
450 * Enhanced decoding of wait status.
451 * Enhanced aio support on non-x86 architectures by using external libaio.h.
452 * Added O_TMPFILE to the list of recognized open mode flags.
453 * Updated the list of filesystem type constants that is used in decoding
454 statfs family syscalls.
455 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
457 * Updated lists of signal constants from Linux 3.19.
458 * Updated lists of errno constants from Linux 3.19.
459 * Updated lists of ioctl commands from Linux 3.9.
460 * Added new syscall entries to match Linux 3.19.
463 * Fixed various errors in mapping between syscall numbers and associated
464 information like the number of syscall arguments, the name of syscall,
466 * Fixed quoting issues in printing descriptors, filenames, network interface
467 names, struct utsname members, device/volume names of BLK* ioctl commands.
468 * Fixed uid_t/git_t decoding.
469 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
470 * Fixed potential open flags truncation on some architectures.
471 * Fixed decoding of struct ifreq.ifr_name.
472 * Fixed decoding of SIOCSIFNAME ioctl command.
473 * Fixed decoding of RENAME_* renameat2 flags.
474 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
475 * Fixed decoding of indirect ipc subcalls on some architectures.
476 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
477 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
478 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
479 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
480 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
481 sparc, sparc64, mips, and s390.
482 * Fixed instruction pointer output (-i option) on architectures that support
483 several personalities.
484 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
486 * Fixed build on systems where struct sigaction has no sa_restorer member.
487 * Fixed build with uclibc and musl libc.
490 * Linux kernel >= 2.5.46 is required.
491 Older versions without a decent PTRACE_SETOPTIONS support will not work.
492 * On mips, linux kernel >= 2.6.15 is required.
493 Older versions without a decent PTRACE_GETREGS support will not work.
494 * On s390 and s390x, linux kernel >= 2.6.27 is required.
495 Older versions without a decent PTRACE_GETREGSET support will not work.
497 Noteworthy changes in release 4.9 (2014-08-15)
498 ==============================================
500 * Changes in behavior
501 * Disabled OABI support on ARM EABI systems by default,
502 added --enable-arm-oabi option to enable it at configure time.
505 * Added experimental -k option to print stack trace after each traced syscall.
506 * Added -w option to produce stats on syscall latency.
507 (addresses Debian bug #457497).
508 * Added ARC architecture support.
509 * Added PTRACE_GETREGS API support on PowerPC.
510 * Enhanced Bionic libc and musl libc support.
511 * Enhanced tracing of x86 personality processes on x86_64 and x32.
512 * Enhanced tracing of ARM personality processes on AArch64.
513 * Enhanced 32/64bit personality detection on PowerPC.
514 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
515 renameat2, and request_key syscalls.
516 * Robustified decoding of select, pselect, and io_submit syscalls.
517 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
518 setdomainname, sethostname, setns, and sync_file_range syscalls.
519 * Enhanced decoding of signal bitmasks.
520 * Enhanced decoding of file descriptors.
521 * Enhanced siginfo_t decoding.
522 * Enhanced PF_NETLINK decoding.
523 * Updated CLOCK_* constants
524 (addresses Fedora bug #1088455).
525 * Added new syscall entries to match Linux 3.16.
528 * Added shmat and shmdt to the set of memory mapping related syscalls.
529 * Fixed detaching from stopped processes.
530 * Fixed fanotify_mark decoding on 32bit architectures.
531 * Fixed offset decoding in preadv and pwritev syscalls.
532 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
533 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
534 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
535 (addresses Fedora bug #993384).
536 * Miscellaneous corrections in the manual page.
537 (Addresses Debian bug #725987).
539 Noteworthy changes in release 4.8 (2013-06-03)
540 ==============================================
542 * Changes in behavior
543 * In case of normal strace termination, when the trace output is
544 redirected to a pipe, strace now closes it and waits for the pipe
545 process termination before exit.
548 * Implemented tracing using PTRACE_SEIZE API (when available).
549 * Implemented more reliable PTRACE_GETREGSET-based process personality
550 detection on x86-64 and x32 (when available).
551 * Added -e trace=memory option for tracing memory mapping related syscalls.
552 * Documented -b option.
553 * Allowed exit status messages to be suppressed by giving -q option twice.
554 * Added AArch64 architecture support
555 (addresses Debian bug #693074 and Fedora bug #969858).
556 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
557 * Added tilegx personality support for Tile.
558 * Enhanced support of NOMMU architectures.
559 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
561 * Added new syscall entries to match Linux 3.9.
562 * Regenerated the list of common ioctl names from Linux 3.9.
563 * Updated the list of errno constants.
564 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
565 PTRACE_O_*, and TCP_* constants.
566 * Implemented decoding of UBI ioctls.
567 * Removed redundant "*32" ioctl names.
570 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
571 (addresses Fedora bug #659382).
572 * Fixed kernel release string parsing
573 (addresses Debian bug #702309).
574 * Fixed decoding of *xattr syscalls
575 (addresses Fedora bug #885233).
576 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
577 (addresses Fedora bug #912790).
578 * Fixed tracing forks on SPARC.
579 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
580 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
581 and truncate64 syscalls.
582 * Fixed categories of multiple syscalls on most of supported architectures.
583 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
584 * Fixed decoding of multiple 32-bit personality syscalls on x32.
585 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
586 S390x, and Tile architectures.
587 * Fixed semtimedop decoding on S390x.
588 * Fixed sram_alloc decoding on Blackfin.
589 * Fixed build when process_vm_readv is a stab.
590 * Fixed build with older versions of libaio.h.
592 Noteworthy changes in release 4.7 (2012-05-02)
593 ==============================================
595 * Changes in behavior
596 * strace no longer suspends waitpid until there is a child
597 for waitpid'ing process to collect status from.
598 * strace no longer detaches from a tracee which is supposed
600 * strace now issues a new message: "+++ exited with EXITCODE +++"
601 which shows exact moment strace got exit notification,
602 analogous to existing "+++ killed by SIG +++" message.
605 * Added x32 personality support (x86_64 architecture).
606 * Added -y and -P options to print file descriptor paths and
607 filter by those paths.
608 * Added -I option to control strace interactivity.
609 * Allowed -p option to take comma or whitespace-separated list of PIDs.
610 * Added strace_log_merge script helper to merge timestamped "strace -ff"
612 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
613 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
614 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
615 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
616 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
617 listxattr, setrlimit and swapon syscalls.
618 * Implemented decoding of loop and mtd ioctls.
619 * Added syscall entries for new linux syscalls.
620 * Added syscall entries for direct socket system calls on powerpc.
621 * Updated the list of errno constants.
622 * Updated lists of MSG_*, STA_*, and TCP_* constants.
623 * Regenerated the list of ioctl names from Linux 3.3.
624 * Enhanced switching between processes with different personalities.
625 * Enhanced signals reporting by using short signal names.
626 * Made ERESTART* messages more descriptive.
627 * Made parsing of numbers from strings more robust.
628 * Added support for compat_statfs64 and statfs64.f_flags.
629 * Changed read of data blocks to use single process_vm_readv syscall
630 (when available) instead of several PTRACE_PEEKDATA operations.
631 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
632 operation instead of several PTRACE_PEEKUSER operations.
633 * Applied various optimizations to make strace work faster.
636 * Implemented proper handling of real SIGTRAPs on kernels supporting
637 PTRACE_O_TRACESYSGOOD.
638 (Addresses Fedora bug #162774).
639 * Fixed sockaddr_un.sun_path name in decoded output.
640 (Addresses Debian bug #554946).
641 * Fixed to avoid potential core file clobbering on exit.
642 (Addresses Debian bug #656398).
643 * Fixed a typo in documentation.
644 (Addresses Debian bug #653309).
645 * Fixed decoding of timer id returned by timer_create.
646 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
647 * Fixed *at syscalls flags decoding.
648 * Fixed ARM EABI 64-bit syscall's arguments decoding.
649 * Fixed semtimedop decoding on s390.
650 * Fixed osf_sigprocmask decoding on alpha.
651 * Fixed ipc and socket subcall decoding on several architectures.
652 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
653 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
654 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
655 * Corrected io_* syscall entries on ARM.
656 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
657 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
658 * Fixed build when libaio-devel is not available.
659 * Fixed configure checks for PTRACE_* constants.
660 * Fixed compilation warnings remained on several architectures.
663 * Removed all non-Linux code. After years of neglect, that dead code
664 just hampered further strace development.
665 * Linux kernel >= 2.6.18 is recommended. Older versions might still
666 work but they haven't been thoroughly tested with this release.
668 Noteworthy changes in release 4.6 (2011-03-15)
669 ==============================================
671 * Changes in behavior
672 * Print diagnostic information about changes in personality mode to
673 standard error instead of standard output.
676 * Implemented a new method of following clone, fork, and vfork
677 syscalls using the Linux kernel's explicit facilities for tracing
678 creation of threads and child processes.
679 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
680 * Implemented decoding of TLS syscalls on m68k.
681 * Implemented biarch support on powerpc64.
682 * Implemented biarch support for getrlimit() and setrlimit().
683 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
684 * Implemented SOL_SCTP socket options decoding.
685 * Added HDIO_* ioctl names.
686 (Addresses Debian bug #450953).
687 * Added LOOP_* ioctl names.
688 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
689 to match Linux 2.6.37.
690 * Updated the list of IPPROTO_* constants to match netinet/in.h.
691 * Implemented decoding of HDIO_* and BLK* ioctls.
692 * Added MicroBlaze architecture support.
693 * Added new syscall entries to match Linux 2.6.37.
694 * Regenerated list of ioctl names from Linux 2.6.37.
695 * Enhanced signal notification decoding.
696 * Documented -C and -D options.
699 * Fixed fetching syscall arguments on m68k.
700 * Fixed an error when judging whether a process has children.
701 * Fixed get/set_robust_list syscall numbers for powerpc.
702 * Fixed a corner case in printing clone flags.
703 * Fixed cross-compiling issues.
704 * Fixed build issues on powerpc64, SH and SPARC.
705 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
706 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
707 fanotify_init, and fanotify_mark syscalls.
708 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
709 * Fixed biarch support in IO dumping.
710 * Fixed raw exit_group decoding.
711 * Fixed decoding of file descriptors on 64-bit architectures.
712 * Fixed a corner case in waitpid handling.
713 (Addresses Red Hat bug #663547).
714 * Fixed stat64 decoding on mips
715 (Addresses Debian bug #599028).
716 * Fixed misleading italics in the manual page.
717 (Addresses Debian bug #589323).
719 Noteworthy changes in release 4.5.20 (2010-04-13)
720 =================================================
723 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
724 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
725 rt_tgsigqueueinfo, perf_event_open.
726 * Enhanced decoding of recently added syscalls on non-x86 architectures
727 by replacing a bare decoder with elaborate parsers enabled earlier
729 * Implemented -C option to combine regular and -c output.
730 (Addresses Debian bug #466196)
731 * Enhanced decoding of mbind and mremap syscalls.
732 * Enhanced SOL_PACKET socket options decoding.
733 * Regenerated list of ioctl names from linux 2.6.33.
734 * Added TILE architecture support.
737 * Fixed build with Linux kernel headers 2.6.32-rc5+.
738 (Addresses Debian bug #560516 and Fedora bug #539044)
739 * Fixed build on mips.
740 * Fixed handling of Linux systems without struct statfs64.
741 * Fixed reporting signal mask by sigreturn on powerpc.
742 * Fixed potential stack buffer overflow in select decoder.
743 (Addresses Fedora bug #556678)
744 * Corrected msgsnd indirect ipccall decoding.
745 * Corrected decoding of 64bit syscalls.
746 (Addresses Debian bug #570603)
747 * Corrected getsockopt decoding on architectures where
748 sizeof(long) > sizeof(int).
749 (Addresses Debian bug #494844)
750 * Corrected decoding of epoll_pwait.
751 (Addresses Debian bug #513014)
752 * Corrected handling of killed threads.
754 Noteworthy changes in release 4.5.19 (2009-10-21)
755 =================================================
757 * Changes in behavior
758 * When command exits, strace now exits with the same exit status.
759 If command is terminated by a signal, strace terminates itself
760 with the same signal, so that strace can be used as a wrapper
761 process transparent to the invoking parent process.
762 When using -p option, the exit status of strace is zero unless
763 there was an unexpected error in doing the tracing.
764 (Addresses Fedora bug #105371 and Debian bug #37665)
767 * Implemented decoding of new Linux syscalls: accept4, dup3,
768 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
769 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
770 * Implemented decoding of accept4 socketcall.
771 * Enhanced prctl decoding.
772 * Enhanced nanosleep decoding.
773 * Enhanced ptrace decoding.
774 * Enhanced futex decoding.
775 * Enhanced CAP_* decoding.
776 * Enhanced SIOCS* ioctls decoding.
777 * Enhanced fcntl F_* flags decoding.
778 * Enhanced semop/semtimedop decoding.
779 * Updated ARM architecture support.
780 * Added Blackfin architecture support.
781 * Added AVR32 architecture support.
782 * Added CRIS architecture support.
783 * Made strace detect when traced process suddenly disappeared.
786 * Fixed syscall numbers for tee and sync_file_range.
787 (Addresses Debian bug #503124)
788 * Fixed several bugs in strings decoder, including potential heap
790 (Addresses Fedora bugs #470529, #478324 and #511035)
791 * Marked sendfile(2) as a network syscall.
792 (Addresses Debian bug #509499)
793 * Fixed accept(2) decoding.
794 (Addresses Debian bug #507573)
795 * Fixed sigtimedwait(2) decoding.
796 * Fixed build on ARM EABI.
797 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
798 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
799 (Addresses Red Hat bug #471169)
800 * Fixed display of 32-bit argv array on 64-bit architectures.
801 (Addresses Fedora bug #519480)
802 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
803 * Fixed HPPA architecture support.
804 (Addresses Debian bugs #437928 and #546619)
809 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
810 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
815 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
816 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
817 * Improved output for prctl system call on Linux.
818 * Improved support for Linux/ARM.
819 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
824 * Improved output for delete_module, futex, and mbind system calls on Linux.
825 * Improved output for SG_IO ioctls on Linux.
826 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
827 eventfd, getcpu, epoll_pwait.
832 * Several biarch improvements.
833 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
834 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
839 * Accept numeric system calls in -e.
844 * Introduce "-e trace=desc".
849 * Better x86-64 support for IA32 processes.
850 * Update PowerPC system calls.
851 * Better printing for Linux aio system calls.
855 * Quick fix release for build issues.
856 * One fix for Linux/ARM system call table.
861 * Print fault address for SIGSEGV/SIGBUS signals when available.
866 * Improve socket ioctl printing.
867 * Update Linux/IA64 syscall list.
868 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
869 * Improve mount flags printing.
870 * Support symbolic printing of x86_64 arch_prctl parameters.
875 * Update syscall tables for Alpha, ARM, HPPA.
876 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
877 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
878 * Improve ioctl command name matching.
879 * Print RTC_* ioctl structure contents.
880 * Support newer RLIMIT_* values.
881 * Print struct cmsghdr details in sendmsg.
886 * Print attribute values in *xattr system calls on Linux.
887 * Include pread and pwrite calls in -e read and -e write tracing.
888 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
889 * Print clock_t values symbolically in Linux clock_* system calls.
893 * Bug fixes, Linux ioctl updates.
894 * David Miller contributed support for Linux/SPARC64.
902 * Update Linux ioctl lists.
903 * Update PF_* and AF_* value lists.
904 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
909 * On Linux using NPTL threads, -p will now attach to all threads in a process.
910 * Handle new mq_* system calls in Linux 2.6.6 and later.
915 * Report some new VM_* bit values on Linux.
916 * Better output for Linux sched_* system calls.
921 * Display multiple ioctl name matches on Linux.
925 * New port to AMD's x86-64 architecture. One strace binary can
926 handle both new x86-64 and old i386 processes.
927 * Fixed support for LFS64 calls.
928 * New switch -E to add/remove environment variables for the command.
929 * Merged s390/s390x port.
930 * Trace an unbounded number of processes.
931 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
932 * Fixed bugs with attach/detach leaving things stopped.
933 * Fixed traced process seeing ECHILD despite live, traced children
934 in waitpid calls with WNOHANG.
935 * Stuart Menefy contributed a port to Linux/SH.
936 * Stephen Thomas contributed a port to Linux/SH64.
937 * Many other bug fixes.
941 * Fix Linux/ia64 support, looks like someone renamed a few things on us
942 * Fix the ioctl setup for Linux, turned out it did not really work.
943 Improve the ioctl extractor as well so we decode some more ones.
947 * compile fixes for Linux/mips
951 * Linux ia64 and hppa ports added
952 * The usual Linux syscall updates (includes 32bit uid/gid support),
953 * Linux ioctl list updated
954 * Support IPv6 scope ids
955 * FreeBSD/i386 port added
956 * UnixWare and Solaris updates
957 * Better support for tracing multithreaded processes in Linux
961 * Compiles on glibc2.0 systems again
962 * Linux/S390 port added
963 * The usual Linux syscall updates
964 * we can follow fork on arm now
968 * Linux/MIPS port added
969 * Lots of Linux updates again
970 * Improved IPv6 support
976 * Compiles on glibc2.0 systems again
980 * Get stat structure properly on Linux 64bit archs
981 * Personalities work again
982 * Compile correctly on SunOS again
988 * Linux (ultra)sparc fixes
995 * add support for more Linux architectures (powerpc, sparc, arm)
996 * support lots more Linux syscalls
997 * fix signal handling
998 * add IPX and IPIP support
999 * check stray syscall after execv
1000 * fix hanging children
1002 Changes in version 3.1
1003 ======================
1005 * Irix5 is supported
1006 * Linux 68k is supported
1007 * Linux alpha is supported
1008 * configure is upgraded to autoconf 2.x
1009 * using -f in combination with -e now works correctly
1010 * output can be piped to a program
1011 * tracing setuid programs works better
1012 * it is now reasonable to install strace setuid to root in some circumstances
1013 * new useful tracing names like file and process to trace whole
1014 classes of system calls, e.g. -efile traces all system calls that
1015 take a file name as an argument
1016 * IPC calls on SunOS 4.1.x are decoded
1017 * Linux program memory is reliably dereferenced
1018 * Linux decodes at least the name of all syscalls as of pre2.0.4
1019 * various cosmetic changes and bug fixes
1021 Changes from versions 2.x to version 3.0
1022 ========================================
1024 * filename arguments are neither abbreviated nor stringified
1025 * string arguments are now true C strings using octal instead of hex by default
1026 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
1027 * by default the output for multiple processes now goes into one file
1028 * all structures, vectors, bitsets, etc. use consistent output formats
1029 * the -c option now means count calls, -i does what the old -c used to do
1031 New Features in version 3.0
1032 ===========================
1034 * non-ascii strings can be optionally printed entirely in hex
1035 * the output format is readable when multiple processes are generating output
1036 * exit values are printed in an alignment column
1037 * is is possible to suppress messages about attaching and detaching
1038 * various tracing features can be enabled on a per syscall/signal/desc basis
1039 * selective tracing of syscalls
1040 * selective printing of syscall structures
1041 * selective abbreviation of long structures on a per syscall basis
1042 * selective printing of raw syscall arguments and results
1043 * selective tracing of signals
1044 * selective dumping of all I/O read from file descriptors
1045 * selective dumping of all I/O written to file descriptors
1046 * optional counting of time, calls, and errors for each syscall