1 Noteworthy changes in release ?.?? (????-??-??)
2 ===============================================
5 * Enhanced decoding of optlen argument of getsockopt syscall.
6 * Enhanced decoding of SO_LINGER option of getsockopt and setsockopt syscalls.
7 * Enhanced decoding of SO_PEERCRED option of getsockopt syscall.
8 * Enhanced decoding of IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP,
9 IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_JOIN_ANYCAST,
10 IPV6_LEAVE_ANYCAST, MCAST_JOIN_GROUP, and MCAST_LEAVE_GROUP options
11 of setsockopt syscall.
12 * Implemented decoding of linux socket filter programs specified
13 for SO_ATTACH_FILTER and SO_ATTACH_REUSEPORT_CBPF socket options.
15 Noteworthy changes in release 4.18 (2017-07-05)
16 ===============================================
19 * Implemented decoding of SCM_TIMESTAMP* control messages.
20 * Implemented decoding of netlink NLMSG_DONE messages.
21 * Implemented decoding of netlink generic nlmsg_type and nlmsg_flags.
22 * Implemented decoding of NETLINK_AUDIT, NETLINK_NETFILTER, NETLINK_ROUTE,
23 NETLINK_SELINUX, NETLINK_SOCK_DIAG, and NETLINK_XFRM message types.
24 * Implemented decoding of NETLINK_GENERIC protocol families.
25 * Implemented basic protocol specific decoding of AF_INET, AF_INET6,
26 AF_NETLINK, AF_PACKET, AF_SMC, and AF_UNIX messages of NETLINK_SOCK_DIAG.
27 * Implemented basic decoding of netlink attributes.
28 * Implemented basic protocol specific decoding of AF_INET, AF_NETLINK,
29 AF_PACKET, AF_SMC, and AF_UNIX netlink attributes of NETLINK_SOCK_DIAG.
30 * Implemented decoding of inet_diag_msg, netlink_diag_msg, and unix_diag_msg
31 netlink attributes of NETLINK_SOCK_DIAG.
32 * Updated lists of ARPHRD_*, KEYCTL_*, NDIAG_SHOW_*, RTM_*, SCM_*, SCTP_*,
33 SO_*, V4L2_*, and prctl ARCH_* constants.
34 * Updated lists of ioctl commands from Linux 4.12.
37 * In interactive mode (-I2), those signals that were blocked at startup
38 will remain blocked for the whole period of strace execution.
39 * strace no longer resets SIGCHLD handler in tracees to the default action.
40 * When traced command is terminated by a blocked signal, strace unblocks
41 that signal to ensure its own termination with the same signal.
42 * Fixed corner cases in decoding of old sigaction syscall.
43 * Fixed build with old kernel headers on mips.
44 * Fixed build on aarch64 and tile with glibc >= 2.26.
45 * Fixed build on arc and nios2.
47 Noteworthy changes in release 4.17 (2017-05-24)
48 ===============================================
50 * Changes in command line syntax
51 * Syscall classes specified in -e trace= option now have % prefix (like
52 -e trace=%process). Old style class names without leading % are still
53 supported, but considered deprecated now.
56 * Optimized syscall filtering.
57 * Improved representation of timestamps.
58 * Enhanced decoding of sched_setattr syscall.
59 * Added -e trace=%stat option for tracing variants of stat syscall.
60 * Added -e trace=%lstat option for tracing variants of lstat syscall.
61 * Added -e trace=%fstat option for tracing variants of fstat and fstatat
63 * Added -e trace=%%stat option for tracing syscalls used for querying file
64 status information (stat, lstat, fstat, fstatat, statx, and their
66 * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs
68 * Added -e trace=%fstatfs option for tracing fstatfs, fstatfs64 and fstatvfs
70 * Added -e trace=%%statfs option for tracing syscalls used for querying file
71 system statistics information (statfs-like, fstatfs-like and ustat).
72 * Added -e trace=/regex option for filtering syscalls using regular
74 * Added support for prepending of question mark before syscall qualification
75 in -e trace expressions in order to suppress error in case no syscalls
76 matched the provided qualification.
77 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
78 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
79 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
81 * Implemented decoding of statx syscall.
82 * Implemented decoding of NS_* ioctl commands.
83 * Implemented decoding of the remaining V4L2_BUF_TYPE_* types.
84 * Implemented decoding of VIDIOC_[SG]_TUNER ioctl commands.
85 * Implemented decoding of NLMSG_ERROR netlink messages.
86 * Improved decoding of BPF_PROG_ATTACH command of bpf syscall.
87 * Improved decoding of misplaced parts in DM_* ioctl commands.
88 * Updated lists of ioctl commands from Linux 4.11.
91 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
92 * Fixed the number of arguments and tracing flags of alpha specific syscalls.
93 * Fixed decoding of old sigsuspend syscall on alpha, cris, mips, powerpc,
94 powerpc64, sh, sh64, sparc, and sparc64.
95 * Fixed decoding of sgetmask and ssetmask syscalls on 64-bit architectures.
96 * Fixed decoding of netlink messages received within struct msghdr.
97 * Worked around a bug in miscompiled aarch64 kernels leading to the 3rd
98 argument of sched_getattr syscall being not quite 32-bit.
99 * Fixed corner cases of printing inaccessible times argument of utimes
100 and futimesat syscalls.
102 Noteworthy changes in release 4.16 (2017-02-14)
103 ===============================================
106 * Implemented syscall return value injection (-e inject=SET:retval= option).
107 * Implemented signal injection (-e inject=SET:signal= option).
108 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
109 * Implemented decoding of all SG_* ioctl commands.
110 * Implemented decoding of ustat syscall.
111 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
112 and BPF_PROG_DETACH commands of bpf syscall.
113 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
114 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
116 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
117 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
118 * Updated lists of ioctl commands from Linux 4.10.
119 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
123 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
124 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
125 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
126 and pwritev* syscalls on x32.
127 * Fixed printing of string arguments of getxattr and setxattr syscalls
128 when -s option is used to limit the printed string size.
129 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
131 * Fixed decoding of SG_* and LOOP_* ioctl commands.
132 * Fixed build on mips with musl libc.
133 * Fixed cross-building of ioctlsort.
134 * Applied minor formatting fixes to the manual page.
136 Noteworthy changes in release 4.15 (2016-12-14)
137 ===============================================
139 * Changes in behavior
140 * Time stamps are now printed according to ISO 8601.
141 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
142 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
143 syscalls is now formatted as an array.
146 * Implemented syscall fault injection (-e fault=... option).
147 * Implemented decoding of DM_* ioctl commands.
148 * Implemented decoding of attr parameter of perf_event_open syscall.
149 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
150 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
151 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
153 * Implemented PTRACE_GETREGS API support on m68k.
154 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
155 and V4L2_* constants.
156 * Updated lists of ioctl commands from Linux 4.9.
157 * Added decoding of recently added syscalls on arc, x32, and xtensa.
158 * Enhanced manual page.
161 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
162 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
163 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
164 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
165 setgroups, setns, unshare, and utimes syscalls.
166 * Fixed handling of verbose flag in printing of controls array
167 of struct v4l2_ext_controls.
168 * Fixed omission of field names in the output of capability, sigaction,
169 sigevent, statfs, timespec, timeval, and utimbuf structures.
170 * Fixed printing of unknown syscalls in siginfo structure.
171 * Fixed decoding of ioctl constants on m68k.
172 * Fixed cris architecture support.
173 * Fixed cross build when host compiler does not support the same
174 set of warning flags as the cross compiler.
175 * Fixed build on SLE10 and SLE11.
177 Noteworthy changes in release 4.14 (2016-10-04)
178 ===============================================
180 * Changes in behavior
181 * When using -p option without a command and no processes has been attached,
182 strace exits with exit status 1.
185 * Added printing of the mode argument of open and openat syscalls
186 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
187 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
188 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
189 and aio family syscalls.
190 * Implemented fetching of the 7th subcall argument on mips o32.
191 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
193 * Updated lists of ioctl commands from Linux 4.8.
194 * Added decoding of new syscalls on sh and sh64.
195 * Added RISC-V architecture support.
198 * Marked io_setup and io_destroy as memory mapping related syscalls.
199 * Fixed leakage of placeholder descriptors to tracees.
200 * Fixed printing of mode_t, umode_t, and umask types.
201 * Fixed decoding of iovec arrays without a limit on total data size.
202 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
203 and ipc family syscalls.
204 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
205 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
207 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
208 * Fixed decoding of struct stat64 on sparc64.
209 * Fixed decoding of uid and gid-related syscalls on sparc64.
210 * Fixed decoding of the forth argument of semctl syscall on sparc64.
211 * Fixed values of tty ioctl constants on sparc64.
212 * Fixed sparc personality support on sparc64.
214 Noteworthy changes in release 4.13 (2016-07-26)
215 ===============================================
218 * Implemented a general netlink socket parser.
219 * Enhanced decoding of socket addresses.
220 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
221 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
222 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
223 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
224 and *_MAGIC constants.
225 * Updated lists of ioctl commands from Linux 4.7.
228 * Fixed decoding of pid_t argument of prlimit64 syscall.
229 * Fixed sign extension issues in the parser of struct rusage.
230 * Fixed race condition in decoding of timeout argument of recvmmsg and
231 rt_sigtimedwait syscalls.
232 * Fixed build with fresh linux kernel headers.
234 Noteworthy changes in release 4.12 (2016-05-31)
235 ===============================================
238 * Implemented simultaneous use of -p option and tracing of a command.
239 (addresses Debian bug #549942).
240 * Implemented caching of netlink conversations to reduce amount of time
241 spent in decoding socket details in -yy mode.
242 * Implemented -yy mode decoding of protocol:portid pairs associated with
243 netlink socket descriptors.
244 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
245 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
247 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
248 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
249 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
250 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
251 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
252 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
253 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
254 statfs64, tgkill, waitid, and xattr family syscalls.
255 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
256 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
257 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
258 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
259 * Added decoding of fadvise64 and fadvise64_64 on s390.
260 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
261 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
262 * Updated lists of ioctl commands from Linux 4.6.
265 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
266 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
267 * Fixed decoding of mlock2 syscall on sparc.
268 * Fixed decoding of osf_shmat syscall on alpha.
269 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
270 (addresses Debian bug #485979 and Fedora bug #1298294).
271 * Fixed decoding of preadv syscall in case of short read.
272 * Fixed decoding and dumping of readv syscall in case of short read.
273 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
274 * Fixed decoding of mincore syscall's last argument.
275 * Fixed remaining errors in mapping between syscall numbers and numbers
276 of syscall arguments.
277 * Applied various fixes to strace-graph script.
279 Noteworthy changes in release 4.11 (2015-12-21)
280 ===============================================
282 * Changes in behavior
283 * Some syscalls have different names depending on architecture and
284 personality. In these cases, syscall filtering and printing now
285 consistently uses the names that match corresponding __NR_* kernel
286 macros of the tracee's architecture and personality.
287 * Added strace prefix to all diagnostic messages.
290 * Enhanced and extended test suite.
291 * Implemented reliable tracing of processes whose personality differs
292 from the personality of strace, fixed decoding of 32-bit personality
293 syscalls on 64-bit architectures.
294 * When some data referenced by syscall arguments is irrelevant or cannot
295 be read from tracee's memory, strace now prints its address consistently.
296 * When a syscall is restarted using restart_syscall mechanism, strace now
297 shows the syscall name on architectures that expose this information.
298 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
299 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
300 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
301 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
302 * Optimized decoding of indirect socket syscalls.
303 * Implemented decoding of nanoseconds along with seconds in stat family
304 syscalls (addresses Fedora bug #1251176).
305 * Implemented decoding of struct statfs.f_flags in statfs syscall.
306 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
308 * Implemented decoding of indirect syscall on mips o32.
309 * Implemented decoding of IPPROTO_IP control messages.
310 * Implemented decoding of setsockopt syscall multicast arguments.
311 * Enhanced decoding of struct sigevent.
312 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
313 and v4l2 ioctl syscall arguments.
314 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
315 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
316 sendfile, setsockopt, and shmctl syscalls.
317 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
318 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
319 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
320 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
321 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
322 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
324 * Added Nios II architecture support.
325 * Added new syscall entries to match Linux 4.4.
328 * Fixed potential short read of strings from tracee's memory.
329 * Fixed -qq option in conjunction with -o option.
330 * Fixed filtering of <unavailable> syscalls.
331 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
332 with 64-bit aligned structures.
333 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
334 syscall flags arguments.
335 * Fixed decoding of 4th argument of clock_nanosleep syscall.
336 * Fixed decoding of getpagesize syscall on m68k.
337 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
338 * Fixed decoding of timezone argument of gettimeofday and settimeofday
340 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
342 * Fixed decoding of pipe syscall on alpha and mips.
343 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
344 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
345 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
347 * Fixed decoding of 4th argument of semctl indirect syscall.
348 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
349 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
350 * Fixed decoding of struct dirent on x32.
351 * Fixed decoding of times syscall return value on mips n32 and x32.
352 * Fixed decoding of path argument of umount2 syscall
353 (addresses Debian bug #785050).
354 * Worked around a kernel bug in tracing privileged executables.
355 * Fixed various errors in mapping between syscall numbers and associated
356 information like the number of syscall arguments, the name of syscall,
359 Noteworthy changes in release 4.10 (2015-03-06)
360 ===============================================
363 * Added -yy option to print protocol and address information associated with
365 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
366 recvmsg, sendmmsg, and recvmmsg syscalls.
367 * Implemented full 32-bit decoding of ioctl commands
368 (addresses Debian bug #692913 and Fedora bug #902788).
369 * Implemented PTRACE_GETREGS API support on ia64.
370 * Implemented PTRACE_GETREGS API support on mips.
371 * Implemented PTRACE_GETREGSET API support on s390/s390x.
372 * Implemented decoding of getrandom and seccomp syscalls.
373 * Implemented full decoding of 64-bit capability sets.
374 * Implemented decoding of all prctl commands.
375 * Implemented decoding of parametrized ioctl commands.
376 * Implemented decoding of evdev ioctl commands.
377 * Implemented decoding of v4l ioctl commands.
378 * Implemented decoding of SG_IO v4 ioctl commands.
379 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
380 * Implemented decoding of FALLOC_FL_* fallocate flags.
381 * Implemented decoding of rt_sigreturn signal mask on aarch64,
383 * Enhanced socket decoder to support bluetooth sockets.
384 * Enhanced decoding of unlisted ioctl commands.
385 * Enhanced decoding of getsockopt and setsockopt syscall.
386 * Enhanced decoding of sysinfo syscall.
387 * Enhanced decoding of struct cmsghdr.
388 * Enhanced decoding of wait status.
389 * Enhanced aio support on non-x86 architectures by using external libaio.h.
390 * Added O_TMPFILE to the list of recognized open mode flags.
391 * Updated the list of filesystem type constants that is used in decoding
392 statfs family syscalls.
393 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
395 * Updated lists of signal constants from Linux 3.19.
396 * Updated lists of errno constants from Linux 3.19.
397 * Updated lists of ioctl commands from Linux 3.9.
398 * Added new syscall entries to match Linux 3.19.
401 * Fixed various errors in mapping between syscall numbers and associated
402 information like the number of syscall arguments, the name of syscall,
404 * Fixed quoting issues in printing descriptors, filenames, network interface
405 names, struct utsname members, device/volume names of BLK* ioctl commands.
406 * Fixed uid_t/git_t decoding.
407 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
408 * Fixed potential open flags truncation on some architectures.
409 * Fixed decoding of struct ifreq.ifr_name.
410 * Fixed decoding of SIOCSIFNAME ioctl command.
411 * Fixed decoding of RENAME_* renameat2 flags.
412 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
413 * Fixed decoding of indirect ipc subcalls on some architectures.
414 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
415 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
416 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
417 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
418 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
419 sparc, sparc64, mips, and s390.
420 * Fixed instruction pointer output (-i option) on architectures that support
421 several personalities.
422 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
424 * Fixed build on systems where struct sigaction has no sa_restorer member.
425 * Fixed build with uclibc and musl libc.
428 * Linux kernel >= 2.5.46 is required.
429 Older versions without a decent PTRACE_SETOPTIONS support will not work.
430 * On mips, linux kernel >= 2.6.15 is required.
431 Older versions without a decent PTRACE_GETREGS support will not work.
432 * On s390 and s390x, linux kernel >= 2.6.27 is required.
433 Older versions without a decent PTRACE_GETREGSET support will not work.
435 Noteworthy changes in release 4.9 (2014-08-15)
436 ==============================================
438 * Changes in behavior
439 * Disabled OABI support on ARM EABI systems by default,
440 added --enable-arm-oabi option to enable it at configure time.
443 * Added experimental -k option to print stack trace after each traced syscall.
444 * Added -w option to produce stats on syscall latency.
445 (addresses Debian bug #457497).
446 * Added ARC architecture support.
447 * Added PTRACE_GETREGS API support on PowerPC.
448 * Enhanced Bionic libc and musl libc support.
449 * Enhanced tracing of x86 personality processes on x86_64 and x32.
450 * Enhanced tracing of ARM personality processes on AArch64.
451 * Enhanced 32/64bit personality detection on PowerPC.
452 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
453 renameat2, and request_key syscalls.
454 * Robustified decoding of select, pselect, and io_submit syscalls.
455 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
456 setdomainname, sethostname, setns, and sync_file_range syscalls.
457 * Enhanced decoding of signal bitmasks.
458 * Enhanced decoding of file descriptors.
459 * Enhanced siginfo_t decoding.
460 * Enhanced PF_NETLINK decoding.
461 * Updated CLOCK_* constants
462 (addresses Fedora bug #1088455).
463 * Added new syscall entries to match Linux 3.16.
466 * Added shmat and shmdt to the set of memory mapping related syscalls.
467 * Fixed detaching from stopped processes.
468 * Fixed fanotify_mark decoding on 32bit architectures.
469 * Fixed offset decoding in preadv and pwritev syscalls.
470 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
471 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
472 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
473 (addresses Fedora bug #993384).
474 * Miscellaneous corrections in the manual page.
475 (Addresses Debian bug #725987).
477 Noteworthy changes in release 4.8 (2013-06-03)
478 ==============================================
480 * Changes in behavior
481 * In case of normal strace termination, when the trace output is
482 redirected to a pipe, strace now closes it and waits for the pipe
483 process termination before exit.
486 * Implemented tracing using PTRACE_SEIZE API (when available).
487 * Implemented more reliable PTRACE_GETREGSET-based process personality
488 detection on x86-64 and x32 (when available).
489 * Added -e trace=memory option for tracing memory mapping related syscalls.
490 * Documented -b option.
491 * Allowed exit status messages to be suppressed by giving -q option twice.
492 * Added AArch64 architecture support
493 (addresses Debian bug #693074 and Fedora bug #969858).
494 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
495 * Added tilegx personality support for Tile.
496 * Enhanced support of NOMMU architectures.
497 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
499 * Added new syscall entries to match Linux 3.9.
500 * Regenerated the list of common ioctl names from Linux 3.9.
501 * Updated the list of errno constants.
502 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
503 PTRACE_O_*, and TCP_* constants.
504 * Implemented decoding of UBI ioctls.
505 * Removed redundant "*32" ioctl names.
508 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
509 (addresses Fedora bug #659382).
510 * Fixed kernel release string parsing
511 (addresses Debian bug #702309).
512 * Fixed decoding of *xattr syscalls
513 (addresses Fedora bug #885233).
514 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
515 (addresses Fedora bug #912790).
516 * Fixed tracing forks on SPARC.
517 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
518 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
519 and truncate64 syscalls.
520 * Fixed categories of multiple syscalls on most of supported architectures.
521 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
522 * Fixed decoding of multiple 32-bit personality syscalls on x32.
523 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
524 S390x, and Tile architectures.
525 * Fixed semtimedop decoding on S390x.
526 * Fixed sram_alloc decoding on Blackfin.
527 * Fixed build when process_vm_readv is a stab.
528 * Fixed build with older versions of libaio.h.
530 Noteworthy changes in release 4.7 (2012-05-02)
531 ==============================================
533 * Changes in behavior
534 * strace no longer suspends waitpid until there is a child
535 for waitpid'ing process to collect status from.
536 * strace no longer detaches from a tracee which is supposed
538 * strace now issues a new message: "+++ exited with EXITCODE +++"
539 which shows exact moment strace got exit notification,
540 analogous to existing "+++ killed by SIG +++" message.
543 * Added x32 personality support (x86_64 architecture).
544 * Added -y and -P options to print file descriptor paths and
545 filter by those paths.
546 * Added -I option to control strace interactivity.
547 * Allowed -p option to take comma or whitespace-separated list of PIDs.
548 * Added strace_log_merge script helper to merge timestamped "strace -ff"
550 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
551 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
552 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
553 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
554 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
555 listxattr, setrlimit and swapon syscalls.
556 * Implemented decoding of loop and mtd ioctls.
557 * Added syscall entries for new linux syscalls.
558 * Added syscall entries for direct socket system calls on powerpc.
559 * Updated the list of errno constants.
560 * Updated lists of MSG_*, STA_*, and TCP_* constants.
561 * Regenerated the list of ioctl names from Linux 3.3.
562 * Enhanced switching between processes with different personalities.
563 * Enhanced signals reporting by using short signal names.
564 * Made ERESTART* messages more descriptive.
565 * Made parsing of numbers from strings more robust.
566 * Added support for compat_statfs64 and statfs64.f_flags.
567 * Changed read of data blocks to use single process_vm_readv syscall
568 (when available) instead of several PTRACE_PEEKDATA operations.
569 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
570 operation instead of several PTRACE_PEEKUSER operations.
571 * Applied various optimizations to make strace work faster.
574 * Implemented proper handling of real SIGTRAPs on kernels supporting
575 PTRACE_O_TRACESYSGOOD.
576 (Addresses Fedora bug #162774).
577 * Fixed sockaddr_un.sun_path name in decoded output.
578 (Addresses Debian bug #554946).
579 * Fixed to avoid potential core file clobbering on exit.
580 (Addresses Debian bug #656398).
581 * Fixed a typo in documentation.
582 (Addresses Debian bug #653309).
583 * Fixed decoding of timer id returned by timer_create.
584 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
585 * Fixed *at syscalls flags decoding.
586 * Fixed ARM EABI 64-bit syscall's arguments decoding.
587 * Fixed semtimedop decoding on s390.
588 * Fixed osf_sigprocmask decoding on alpha.
589 * Fixed ipc and socket subcall decoding on several architectures.
590 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
591 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
592 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
593 * Corrected io_* syscall entries on ARM.
594 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
595 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
596 * Fixed build when libaio-devel is not available.
597 * Fixed configure checks for PTRACE_* constants.
598 * Fixed compilation warnings remained on several architectures.
601 * Removed all non-Linux code. After years of neglect, that dead code
602 just hampered further strace development.
603 * Linux kernel >= 2.6.18 is recommended. Older versions might still
604 work but they haven't been thoroughly tested with this release.
606 Noteworthy changes in release 4.6 (2011-03-15)
607 ==============================================
609 * Changes in behavior
610 * Print diagnostic information about changes in personality mode to
611 standard error instead of standard output.
614 * Implemented a new method of following clone, fork, and vfork
615 syscalls using the Linux kernel's explicit facilities for tracing
616 creation of threads and child processes.
617 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
618 * Implemented decoding of TLS syscalls on m68k.
619 * Implemented biarch support on powerpc64.
620 * Implemented biarch support for getrlimit() and setrlimit().
621 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
622 * Implemented SOL_SCTP socket options decoding.
623 * Added HDIO_* ioctl names.
624 (Addresses Debian bug #450953).
625 * Added LOOP_* ioctl names.
626 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
627 to match Linux 2.6.37.
628 * Updated the list of IPPROTO_* constants to match netinet/in.h.
629 * Implemented decoding of HDIO_* and BLK* ioctls.
630 * Added MicroBlaze architecture support.
631 * Added new syscall entries to match Linux 2.6.37.
632 * Regenerated list of ioctl names from Linux 2.6.37.
633 * Enhanced signal notification decoding.
634 * Documented -C and -D options.
637 * Fixed fetching syscall arguments on m68k.
638 * Fixed an error when judging whether a process has children.
639 * Fixed get/set_robust_list syscall numbers for powerpc.
640 * Fixed a corner case in printing clone flags.
641 * Fixed cross-compiling issues.
642 * Fixed build issues on powerpc64, SH and SPARC.
643 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
644 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
645 fanotify_init, and fanotify_mark syscalls.
646 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
647 * Fixed biarch support in IO dumping.
648 * Fixed raw exit_group decoding.
649 * Fixed decoding of file descriptors on 64-bit architectures.
650 * Fixed a corner case in waitpid handling.
651 (Addresses Red Hat bug #663547).
652 * Fixed stat64 decoding on mips
653 (Addresses Debian bug #599028).
654 * Fixed misleading italics in the manual page.
655 (Addresses Debian bug #589323).
657 Noteworthy changes in release 4.5.20 (2010-04-13)
658 =================================================
661 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
662 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
663 rt_tgsigqueueinfo, perf_event_open.
664 * Enhanced decoding of recently added syscalls on non-x86 architectures
665 by replacing a bare decoder with elaborate parsers enabled earlier
667 * Implemented -C option to combine regular and -c output.
668 (Addresses Debian bug #466196)
669 * Enhanced decoding of mbind and mremap syscalls.
670 * Enhanced SOL_PACKET socket options decoding.
671 * Regenerated list of ioctl names from linux 2.6.33.
672 * Added TILE architecture support.
675 * Fixed build with Linux kernel headers 2.6.32-rc5+.
676 (Addresses Debian bug #560516 and Fedora bug #539044)
677 * Fixed build on mips.
678 * Fixed handling of Linux systems without struct statfs64.
679 * Fixed reporting signal mask by sigreturn on powerpc.
680 * Fixed potential stack buffer overflow in select decoder.
681 (Addresses Fedora bug #556678)
682 * Corrected msgsnd indirect ipccall decoding.
683 * Corrected decoding of 64bit syscalls.
684 (Addresses Debian bug #570603)
685 * Corrected getsockopt decoding on architectures where
686 sizeof(long) > sizeof(int).
687 (Addresses Debian bug #494844)
688 * Corrected decoding of epoll_pwait.
689 (Addresses Debian bug #513014)
690 * Corrected handling of killed threads.
692 Noteworthy changes in release 4.5.19 (2009-10-21)
693 =================================================
695 * Changes in behavior
696 * When command exits, strace now exits with the same exit status.
697 If command is terminated by a signal, strace terminates itself
698 with the same signal, so that strace can be used as a wrapper
699 process transparent to the invoking parent process.
700 When using -p option, the exit status of strace is zero unless
701 there was an unexpected error in doing the tracing.
702 (Addresses Fedora bug #105371 and Debian bug #37665)
705 * Implemented decoding of new Linux syscalls: accept4, dup3,
706 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
707 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
708 * Implemented decoding of accept4 socketcall.
709 * Enhanced prctl decoding.
710 * Enhanced nanosleep decoding.
711 * Enhanced ptrace decoding.
712 * Enhanced futex decoding.
713 * Enhanced CAP_* decoding.
714 * Enhanced SIOCS* ioctls decoding.
715 * Enhanced fcntl F_* flags decoding.
716 * Enhanced semop/semtimedop decoding.
717 * Updated ARM architecture support.
718 * Added Blackfin architecture support.
719 * Added AVR32 architecture support.
720 * Added CRIS architecture support.
721 * Made strace detect when traced process suddenly disappeared.
724 * Fixed syscall numbers for tee and sync_file_range.
725 (Addresses Debian bug #503124)
726 * Fixed several bugs in strings decoder, including potential heap
728 (Addresses Fedora bugs #470529, #478324 and #511035)
729 * Marked sendfile(2) as a network syscall.
730 (Addresses Debian bug #509499)
731 * Fixed accept(2) decoding.
732 (Addresses Debian bug #507573)
733 * Fixed sigtimedwait(2) decoding.
734 * Fixed build on ARM EABI.
735 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
736 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
737 (Addresses Red Hat bug #471169)
738 * Fixed display of 32-bit argv array on 64-bit architectures.
739 (Addresses Fedora bug #519480)
740 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
741 * Fixed HPPA architecture support.
742 (Addresses Debian bugs #437928 and #546619)
747 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
748 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
753 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
754 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
755 * Improved output for prctl system call on Linux.
756 * Improved support for Linux/ARM.
757 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
762 * Improved output for delete_module, futex, and mbind system calls on Linux.
763 * Improved output for SG_IO ioctls on Linux.
764 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
765 eventfd, getcpu, epoll_pwait.
770 * Several biarch improvements.
771 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
772 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
777 * Accept numeric system calls in -e.
782 * Introduce "-e trace=desc".
787 * Better x86-64 support for IA32 processes.
788 * Update PowerPC system calls.
789 * Better printing for Linux aio system calls.
793 * Quick fix release for build issues.
794 * One fix for Linux/ARM system call table.
799 * Print fault address for SIGSEGV/SIGBUS signals when available.
804 * Improve socket ioctl printing.
805 * Update Linux/IA64 syscall list.
806 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
807 * Improve mount flags printing.
808 * Support symbolic printing of x86_64 arch_prctl parameters.
813 * Update syscall tables for Alpha, ARM, HPPA.
814 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
815 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
816 * Improve ioctl command name matching.
817 * Print RTC_* ioctl structure contents.
818 * Support newer RLIMIT_* values.
819 * Print struct cmsghdr details in sendmsg.
824 * Print attribute values in *xattr system calls on Linux.
825 * Include pread and pwrite calls in -e read and -e write tracing.
826 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
827 * Print clock_t values symbolically in Linux clock_* system calls.
831 * Bug fixes, Linux ioctl updates.
832 * David Miller contributed support for Linux/SPARC64.
840 * Update Linux ioctl lists.
841 * Update PF_* and AF_* value lists.
842 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
847 * On Linux using NPTL threads, -p will now attach to all threads in a process.
848 * Handle new mq_* system calls in Linux 2.6.6 and later.
853 * Report some new VM_* bit values on Linux.
854 * Better output for Linux sched_* system calls.
859 * Display multiple ioctl name matches on Linux.
863 * New port to AMD's x86-64 architecture. One strace binary can
864 handle both new x86-64 and old i386 processes.
865 * Fixed support for LFS64 calls.
866 * New switch -E to add/remove environment variables for the command.
867 * Merged s390/s390x port.
868 * Trace an unbounded number of processes.
869 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
870 * Fixed bugs with attach/detach leaving things stopped.
871 * Fixed traced process seeing ECHILD despite live, traced children
872 in waitpid calls with WNOHANG.
873 * Stuart Menefy contributed a port to Linux/SH.
874 * Stephen Thomas contributed a port to Linux/SH64.
875 * Many other bug fixes.
879 * Fix Linux/ia64 support, looks like someone renamed a few things on us
880 * Fix the ioctl setup for Linux, turned out it did not really work.
881 Improve the ioctl extractor as well so we decode some more ones.
885 * compile fixes for Linux/mips
889 * Linux ia64 and hppa ports added
890 * The usual Linux syscall updates (includes 32bit uid/gid support),
891 * Linux ioctl list updated
892 * Support IPv6 scope ids
893 * FreeBSD/i386 port added
894 * UnixWare and Solaris updates
895 * Better support for tracing multithreaded processes in Linux
899 * Compiles on glibc2.0 systems again
900 * Linux/S390 port added
901 * The usual Linux syscall updates
902 * we can follow fork on arm now
906 * Linux/MIPS port added
907 * Lots of Linux updates again
908 * Improved IPv6 support
914 * Compiles on glibc2.0 systems again
918 * Get stat structure properly on Linux 64bit archs
919 * Personalities work again
920 * Compile correctly on SunOS again
926 * Linux (ultra)sparc fixes
933 * add support for more Linux architectures (powerpc, sparc, arm)
934 * support lots more Linux syscalls
935 * fix signal handling
936 * add IPX and IPIP support
937 * check stray syscall after execv
938 * fix hanging children
940 Changes in version 3.1
941 ======================
944 * Linux 68k is supported
945 * Linux alpha is supported
946 * configure is upgraded to autoconf 2.x
947 * using -f in combination with -e now works correctly
948 * output can be piped to a program
949 * tracing setuid programs works better
950 * it is now reasonable to install strace setuid to root in some circumstances
951 * new useful tracing names like file and process to trace whole
952 classes of system calls, e.g. -efile traces all system calls that
953 take a file name as an argument
954 * IPC calls on SunOS 4.1.x are decoded
955 * Linux program memory is reliably dereferenced
956 * Linux decodes at least the name of all syscalls as of pre2.0.4
957 * various cosmetic changes and bug fixes
959 Changes from versions 2.x to version 3.0
960 ========================================
962 * filename arguments are neither abbreviated nor stringified
963 * string arguments are now true C strings using octal instead of hex by default
964 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
965 * by default the output for multiple processes now goes into one file
966 * all structures, vectors, bitsets, etc. use consistent output formats
967 * the -c option now means count calls, -i does what the old -c used to do
969 New Features in version 3.0
970 ===========================
972 * non-ascii strings can be optionally printed entirely in hex
973 * the output format is readable when multiple processes are generating output
974 * exit values are printed in an alignment column
975 * is is possible to suppress messages about attaching and detaching
976 * various tracing features can be enabled on a per syscall/signal/desc basis
977 * selective tracing of syscalls
978 * selective printing of syscall structures
979 * selective abbreviation of long structures on a per syscall basis
980 * selective printing of raw syscall arguments and results
981 * selective tracing of signals
982 * selective dumping of all I/O read from file descriptors
983 * selective dumping of all I/O written to file descriptors
984 * optional counting of time, calls, and errors for each syscall
projects / strace / blob