1 Noteworthy changes in release 4.18 (2017-07-05)
2 ===============================================
5 * Implemented decoding of SCM_TIMESTAMP* control messages.
6 * Implemented decoding of netlink NLMSG_DONE messages.
7 * Implemented decoding of netlink generic nlmsg_type and nlmsg_flags.
8 * Implemented decoding of NETLINK_AUDIT, NETLINK_NETFILTER, NETLINK_ROUTE,
9 NETLINK_SELINUX, NETLINK_SOCK_DIAG, and NETLINK_XFRM message types.
10 * Implemented decoding of NETLINK_GENERIC protocol families.
11 * Implemented basic protocol specific decoding of AF_INET, AF_INET6,
12 AF_NETLINK, AF_PACKET, AF_SMC, and AF_UNIX messages of NETLINK_SOCK_DIAG.
13 * Implemented basic decoding of netlink attributes.
14 * Implemented basic protocol specific decoding of AF_INET, AF_NETLINK,
15 AF_PACKET, AF_SMC, and AF_UNIX netlink attributes of NETLINK_SOCK_DIAG.
16 * Implemented decoding of inet_diag_msg, netlink_diag_msg, and unix_diag_msg
17 netlink attributes of NETLINK_SOCK_DIAG.
18 * Updated lists of ARPHRD_*, KEYCTL_*, NDIAG_SHOW_*, RTM_*, SCM_*, SCTP_*,
19 SO_*, V4L2_*, and prctl ARCH_* constants.
20 * Updated lists of ioctl commands from Linux 4.12.
23 * In interactive mode (-I2), those signals that were blocked at startup
24 will remain blocked for the whole period of strace execution.
25 * strace no longer resets SIGCHLD handler in tracees to the default action.
26 * When traced command is terminated by a blocked signal, strace unblocks
27 that signal to ensure its own termination with the same signal.
28 * Fixed corner cases in decoding of old sigaction syscall.
29 * Fixed build with old kernel headers on mips.
30 * Fixed build on aarch64 and tile with glibc >= 2.26.
31 * Fixed build on arc and nios2.
33 Noteworthy changes in release 4.17 (2017-05-24)
34 ===============================================
36 * Changes in command line syntax
37 * Syscall classes specified in -e trace= option now have % prefix (like
38 -e trace=%process). Old style class names without leading % are still
39 supported, but considered deprecated now.
42 * Optimized syscall filtering.
43 * Improved representation of timestamps.
44 * Enhanced decoding of sched_setattr syscall.
45 * Added -e trace=%stat option for tracing variants of stat syscall.
46 * Added -e trace=%lstat option for tracing variants of lstat syscall.
47 * Added -e trace=%fstat option for tracing variants of fstat and fstatat
49 * Added -e trace=%%stat option for tracing syscalls used for querying file
50 status information (stat, lstat, fstat, fstatat, statx, and their
52 * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs
54 * Added -e trace=%fstatfs option for tracing fstatfs, fstatfs64 and fstatvfs
56 * Added -e trace=%%statfs option for tracing syscalls used for querying file
57 system statistics information (statfs-like, fstatfs-like and ustat).
58 * Added -e trace=/regex option for filtering syscalls using regular
60 * Added support for prepending of question mark before syscall qualification
61 in -e trace expressions in order to suppress error in case no syscalls
62 matched the provided qualification.
63 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
64 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
65 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
67 * Implemented decoding of statx syscall.
68 * Implemented decoding of NS_* ioctl commands.
69 * Implemented decoding of the remaining V4L2_BUF_TYPE_* types.
70 * Implemented decoding of VIDIOC_[SG]_TUNER ioctl commands.
71 * Implemented decoding of NLMSG_ERROR netlink messages.
72 * Improved decoding of BPF_PROG_ATTACH command of bpf syscall.
73 * Improved decoding of misplaced parts in DM_* ioctl commands.
74 * Updated lists of ioctl commands from Linux 4.11.
77 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
78 * Fixed the number of arguments and tracing flags of alpha specific syscalls.
79 * Fixed decoding of old sigsuspend syscall on alpha, cris, mips, powerpc,
80 powerpc64, sh, sh64, sparc, and sparc64.
81 * Fixed decoding of sgetmask and ssetmask syscalls on 64-bit architectures.
82 * Fixed decoding of netlink messages received within struct msghdr.
83 * Worked around a bug in miscompiled aarch64 kernels leading to the 3rd
84 argument of sched_getattr syscall being not quite 32-bit.
85 * Fixed corner cases of printing inaccessible times argument of utimes
86 and futimesat syscalls.
88 Noteworthy changes in release 4.16 (2017-02-14)
89 ===============================================
92 * Implemented syscall return value injection (-e inject=SET:retval= option).
93 * Implemented signal injection (-e inject=SET:signal= option).
94 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
95 * Implemented decoding of all SG_* ioctl commands.
96 * Implemented decoding of ustat syscall.
97 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
98 and BPF_PROG_DETACH commands of bpf syscall.
99 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
100 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
102 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
103 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
104 * Updated lists of ioctl commands from Linux 4.10.
105 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
109 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
110 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
111 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
112 and pwritev* syscalls on x32.
113 * Fixed printing of string arguments of getxattr and setxattr syscalls
114 when -s option is used to limit the printed string size.
115 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
117 * Fixed decoding of SG_* and LOOP_* ioctl commands.
118 * Fixed build on mips with musl libc.
119 * Fixed cross-building of ioctlsort.
120 * Applied minor formatting fixes to the manual page.
122 Noteworthy changes in release 4.15 (2016-12-14)
123 ===============================================
125 * Changes in behavior
126 * Time stamps are now printed according to ISO 8601.
127 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
128 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
129 syscalls is now formatted as an array.
132 * Implemented syscall fault injection (-e fault=... option).
133 * Implemented decoding of DM_* ioctl commands.
134 * Implemented decoding of attr parameter of perf_event_open syscall.
135 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
136 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
137 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
139 * Implemented PTRACE_GETREGS API support on m68k.
140 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
141 and V4L2_* constants.
142 * Updated lists of ioctl commands from Linux 4.9.
143 * Added decoding of recently added syscalls on arc, x32, and xtensa.
144 * Enhanced manual page.
147 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
148 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
149 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
150 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
151 setgroups, setns, unshare, and utimes syscalls.
152 * Fixed handling of verbose flag in printing of controls array
153 of struct v4l2_ext_controls.
154 * Fixed omission of field names in the output of capability, sigaction,
155 sigevent, statfs, timespec, timeval, and utimbuf structures.
156 * Fixed printing of unknown syscalls in siginfo structure.
157 * Fixed decoding of ioctl constants on m68k.
158 * Fixed cris architecture support.
159 * Fixed cross build when host compiler does not support the same
160 set of warning flags as the cross compiler.
161 * Fixed build on SLE10 and SLE11.
163 Noteworthy changes in release 4.14 (2016-10-04)
164 ===============================================
166 * Changes in behavior
167 * When using -p option without a command and no processes has been attached,
168 strace exits with exit status 1.
171 * Added printing of the mode argument of open and openat syscalls
172 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
173 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
174 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
175 and aio family syscalls.
176 * Implemented fetching of the 7th subcall argument on mips o32.
177 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
179 * Updated lists of ioctl commands from Linux 4.8.
180 * Added decoding of new syscalls on sh and sh64.
181 * Added RISC-V architecture support.
184 * Marked io_setup and io_destroy as memory mapping related syscalls.
185 * Fixed leakage of placeholder descriptors to tracees.
186 * Fixed printing of mode_t, umode_t, and umask types.
187 * Fixed decoding of iovec arrays without a limit on total data size.
188 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
189 and ipc family syscalls.
190 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
191 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
193 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
194 * Fixed decoding of struct stat64 on sparc64.
195 * Fixed decoding of uid and gid-related syscalls on sparc64.
196 * Fixed decoding of the forth argument of semctl syscall on sparc64.
197 * Fixed values of tty ioctl constants on sparc64.
198 * Fixed sparc personality support on sparc64.
200 Noteworthy changes in release 4.13 (2016-07-26)
201 ===============================================
204 * Implemented a general netlink socket parser.
205 * Enhanced decoding of socket addresses.
206 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
207 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
208 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
209 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
210 and *_MAGIC constants.
211 * Updated lists of ioctl commands from Linux 4.7.
214 * Fixed decoding of pid_t argument of prlimit64 syscall.
215 * Fixed sign extension issues in the parser of struct rusage.
216 * Fixed race condition in decoding of timeout argument of recvmmsg and
217 rt_sigtimedwait syscalls.
218 * Fixed build with fresh linux kernel headers.
220 Noteworthy changes in release 4.12 (2016-05-31)
221 ===============================================
224 * Implemented simultaneous use of -p option and tracing of a command.
225 (addresses Debian bug #549942).
226 * Implemented caching of netlink conversations to reduce amount of time
227 spent in decoding socket details in -yy mode.
228 * Implemented -yy mode decoding of protocol:portid pairs associated with
229 netlink socket descriptors.
230 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
231 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
233 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
234 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
235 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
236 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
237 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
238 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
239 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
240 statfs64, tgkill, waitid, and xattr family syscalls.
241 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
242 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
243 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
244 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
245 * Added decoding of fadvise64 and fadvise64_64 on s390.
246 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
247 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
248 * Updated lists of ioctl commands from Linux 4.6.
251 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
252 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
253 * Fixed decoding of mlock2 syscall on sparc.
254 * Fixed decoding of osf_shmat syscall on alpha.
255 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
256 (addresses Debian bug #485979 and Fedora bug #1298294).
257 * Fixed decoding of preadv syscall in case of short read.
258 * Fixed decoding and dumping of readv syscall in case of short read.
259 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
260 * Fixed decoding of mincore syscall's last argument.
261 * Fixed remaining errors in mapping between syscall numbers and numbers
262 of syscall arguments.
263 * Applied various fixes to strace-graph script.
265 Noteworthy changes in release 4.11 (2015-12-21)
266 ===============================================
268 * Changes in behavior
269 * Some syscalls have different names depending on architecture and
270 personality. In these cases, syscall filtering and printing now
271 consistently uses the names that match corresponding __NR_* kernel
272 macros of the tracee's architecture and personality.
273 * Added strace prefix to all diagnostic messages.
276 * Enhanced and extended test suite.
277 * Implemented reliable tracing of processes whose personality differs
278 from the personality of strace, fixed decoding of 32-bit personality
279 syscalls on 64-bit architectures.
280 * When some data referenced by syscall arguments is irrelevant or cannot
281 be read from tracee's memory, strace now prints its address consistently.
282 * When a syscall is restarted using restart_syscall mechanism, strace now
283 shows the syscall name on architectures that expose this information.
284 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
285 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
286 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
287 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
288 * Optimized decoding of indirect socket syscalls.
289 * Implemented decoding of nanoseconds along with seconds in stat family
290 syscalls (addresses Fedora bug #1251176).
291 * Implemented decoding of struct statfs.f_flags in statfs syscall.
292 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
294 * Implemented decoding of indirect syscall on mips o32.
295 * Implemented decoding of IPPROTO_IP control messages.
296 * Implemented decoding of setsockopt syscall multicast arguments.
297 * Enhanced decoding of struct sigevent.
298 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
299 and v4l2 ioctl syscall arguments.
300 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
301 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
302 sendfile, setsockopt, and shmctl syscalls.
303 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
304 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
305 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
306 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
307 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
308 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
310 * Added Nios II architecture support.
311 * Added new syscall entries to match Linux 4.4.
314 * Fixed potential short read of strings from tracee's memory.
315 * Fixed -qq option in conjunction with -o option.
316 * Fixed filtering of <unavailable> syscalls.
317 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
318 with 64-bit aligned structures.
319 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
320 syscall flags arguments.
321 * Fixed decoding of 4th argument of clock_nanosleep syscall.
322 * Fixed decoding of getpagesize syscall on m68k.
323 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
324 * Fixed decoding of timezone argument of gettimeofday and settimeofday
326 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
328 * Fixed decoding of pipe syscall on alpha and mips.
329 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
330 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
331 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
333 * Fixed decoding of 4th argument of semctl indirect syscall.
334 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
335 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
336 * Fixed decoding of struct dirent on x32.
337 * Fixed decoding of times syscall return value on mips n32 and x32.
338 * Fixed decoding of path argument of umount2 syscall
339 (addresses Debian bug #785050).
340 * Worked around a kernel bug in tracing privileged executables.
341 * Fixed various errors in mapping between syscall numbers and associated
342 information like the number of syscall arguments, the name of syscall,
345 Noteworthy changes in release 4.10 (2015-03-06)
346 ===============================================
349 * Added -yy option to print protocol and address information associated with
351 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
352 recvmsg, sendmmsg, and recvmmsg syscalls.
353 * Implemented full 32-bit decoding of ioctl commands
354 (addresses Debian bug #692913 and Fedora bug #902788).
355 * Implemented PTRACE_GETREGS API support on ia64.
356 * Implemented PTRACE_GETREGS API support on mips.
357 * Implemented PTRACE_GETREGSET API support on s390/s390x.
358 * Implemented decoding of getrandom and seccomp syscalls.
359 * Implemented full decoding of 64-bit capability sets.
360 * Implemented decoding of all prctl commands.
361 * Implemented decoding of parametrized ioctl commands.
362 * Implemented decoding of evdev ioctl commands.
363 * Implemented decoding of v4l ioctl commands.
364 * Implemented decoding of SG_IO v4 ioctl commands.
365 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
366 * Implemented decoding of FALLOC_FL_* fallocate flags.
367 * Implemented decoding of rt_sigreturn signal mask on aarch64,
369 * Enhanced socket decoder to support bluetooth sockets.
370 * Enhanced decoding of unlisted ioctl commands.
371 * Enhanced decoding of getsockopt and setsockopt syscall.
372 * Enhanced decoding of sysinfo syscall.
373 * Enhanced decoding of struct cmsghdr.
374 * Enhanced decoding of wait status.
375 * Enhanced aio support on non-x86 architectures by using external libaio.h.
376 * Added O_TMPFILE to the list of recognized open mode flags.
377 * Updated the list of filesystem type constants that is used in decoding
378 statfs family syscalls.
379 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
381 * Updated lists of signal constants from Linux 3.19.
382 * Updated lists of errno constants from Linux 3.19.
383 * Updated lists of ioctl commands from Linux 3.9.
384 * Added new syscall entries to match Linux 3.19.
387 * Fixed various errors in mapping between syscall numbers and associated
388 information like the number of syscall arguments, the name of syscall,
390 * Fixed quoting issues in printing descriptors, filenames, network interface
391 names, struct utsname members, device/volume names of BLK* ioctl commands.
392 * Fixed uid_t/git_t decoding.
393 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
394 * Fixed potential open flags truncation on some architectures.
395 * Fixed decoding of struct ifreq.ifr_name.
396 * Fixed decoding of SIOCSIFNAME ioctl command.
397 * Fixed decoding of RENAME_* renameat2 flags.
398 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
399 * Fixed decoding of indirect ipc subcalls on some architectures.
400 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
401 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
402 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
403 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
404 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
405 sparc, sparc64, mips, and s390.
406 * Fixed instruction pointer output (-i option) on architectures that support
407 several personalities.
408 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
410 * Fixed build on systems where struct sigaction has no sa_restorer member.
411 * Fixed build with uclibc and musl libc.
414 * Linux kernel >= 2.5.46 is required.
415 Older versions without a decent PTRACE_SETOPTIONS support will not work.
416 * On mips, linux kernel >= 2.6.15 is required.
417 Older versions without a decent PTRACE_GETREGS support will not work.
418 * On s390 and s390x, linux kernel >= 2.6.27 is required.
419 Older versions without a decent PTRACE_GETREGSET support will not work.
421 Noteworthy changes in release 4.9 (2014-08-15)
422 ==============================================
424 * Changes in behavior
425 * Disabled OABI support on ARM EABI systems by default,
426 added --enable-arm-oabi option to enable it at configure time.
429 * Added experimental -k option to print stack trace after each traced syscall.
430 * Added -w option to produce stats on syscall latency.
431 (addresses Debian bug #457497).
432 * Added ARC architecture support.
433 * Added PTRACE_GETREGS API support on PowerPC.
434 * Enhanced Bionic libc and musl libc support.
435 * Enhanced tracing of x86 personality processes on x86_64 and x32.
436 * Enhanced tracing of ARM personality processes on AArch64.
437 * Enhanced 32/64bit personality detection on PowerPC.
438 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
439 renameat2, and request_key syscalls.
440 * Robustified decoding of select, pselect, and io_submit syscalls.
441 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
442 setdomainname, sethostname, setns, and sync_file_range syscalls.
443 * Enhanced decoding of signal bitmasks.
444 * Enhanced decoding of file descriptors.
445 * Enhanced siginfo_t decoding.
446 * Enhanced PF_NETLINK decoding.
447 * Updated CLOCK_* constants
448 (addresses Fedora bug #1088455).
449 * Added new syscall entries to match Linux 3.16.
452 * Added shmat and shmdt to the set of memory mapping related syscalls.
453 * Fixed detaching from stopped processes.
454 * Fixed fanotify_mark decoding on 32bit architectures.
455 * Fixed offset decoding in preadv and pwritev syscalls.
456 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
457 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
458 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
459 (addresses Fedora bug #993384).
460 * Miscellaneous corrections in the manual page.
461 (Addresses Debian bug #725987).
463 Noteworthy changes in release 4.8 (2013-06-03)
464 ==============================================
466 * Changes in behavior
467 * In case of normal strace termination, when the trace output is
468 redirected to a pipe, strace now closes it and waits for the pipe
469 process termination before exit.
472 * Implemented tracing using PTRACE_SEIZE API (when available).
473 * Implemented more reliable PTRACE_GETREGSET-based process personality
474 detection on x86-64 and x32 (when available).
475 * Added -e trace=memory option for tracing memory mapping related syscalls.
476 * Documented -b option.
477 * Allowed exit status messages to be suppressed by giving -q option twice.
478 * Added AArch64 architecture support
479 (addresses Debian bug #693074 and Fedora bug #969858).
480 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
481 * Added tilegx personality support for Tile.
482 * Enhanced support of NOMMU architectures.
483 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
485 * Added new syscall entries to match Linux 3.9.
486 * Regenerated the list of common ioctl names from Linux 3.9.
487 * Updated the list of errno constants.
488 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
489 PTRACE_O_*, and TCP_* constants.
490 * Implemented decoding of UBI ioctls.
491 * Removed redundant "*32" ioctl names.
494 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
495 (addresses Fedora bug #659382).
496 * Fixed kernel release string parsing
497 (addresses Debian bug #702309).
498 * Fixed decoding of *xattr syscalls
499 (addresses Fedora bug #885233).
500 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
501 (addresses Fedora bug #912790).
502 * Fixed tracing forks on SPARC.
503 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
504 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
505 and truncate64 syscalls.
506 * Fixed categories of multiple syscalls on most of supported architectures.
507 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
508 * Fixed decoding of multiple 32-bit personality syscalls on x32.
509 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
510 S390x, and Tile architectures.
511 * Fixed semtimedop decoding on S390x.
512 * Fixed sram_alloc decoding on Blackfin.
513 * Fixed build when process_vm_readv is a stab.
514 * Fixed build with older versions of libaio.h.
516 Noteworthy changes in release 4.7 (2012-05-02)
517 ==============================================
519 * Changes in behavior
520 * strace no longer suspends waitpid until there is a child
521 for waitpid'ing process to collect status from.
522 * strace no longer detaches from a tracee which is supposed
524 * strace now issues a new message: "+++ exited with EXITCODE +++"
525 which shows exact moment strace got exit notification,
526 analogous to existing "+++ killed by SIG +++" message.
529 * Added x32 personality support (x86_64 architecture).
530 * Added -y and -P options to print file descriptor paths and
531 filter by those paths.
532 * Added -I option to control strace interactivity.
533 * Allowed -p option to take comma or whitespace-separated list of PIDs.
534 * Added strace_log_merge script helper to merge timestamped "strace -ff"
536 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
537 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
538 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
539 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
540 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
541 listxattr, setrlimit and swapon syscalls.
542 * Implemented decoding of loop and mtd ioctls.
543 * Added syscall entries for new linux syscalls.
544 * Added syscall entries for direct socket system calls on powerpc.
545 * Updated the list of errno constants.
546 * Updated lists of MSG_*, STA_*, and TCP_* constants.
547 * Regenerated the list of ioctl names from Linux 3.3.
548 * Enhanced switching between processes with different personalities.
549 * Enhanced signals reporting by using short signal names.
550 * Made ERESTART* messages more descriptive.
551 * Made parsing of numbers from strings more robust.
552 * Added support for compat_statfs64 and statfs64.f_flags.
553 * Changed read of data blocks to use single process_vm_readv syscall
554 (when available) instead of several PTRACE_PEEKDATA operations.
555 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
556 operation instead of several PTRACE_PEEKUSER operations.
557 * Applied various optimizations to make strace work faster.
560 * Implemented proper handling of real SIGTRAPs on kernels supporting
561 PTRACE_O_TRACESYSGOOD.
562 (Addresses Fedora bug #162774).
563 * Fixed sockaddr_un.sun_path name in decoded output.
564 (Addresses Debian bug #554946).
565 * Fixed to avoid potential core file clobbering on exit.
566 (Addresses Debian bug #656398).
567 * Fixed a typo in documentation.
568 (Addresses Debian bug #653309).
569 * Fixed decoding of timer id returned by timer_create.
570 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
571 * Fixed *at syscalls flags decoding.
572 * Fixed ARM EABI 64-bit syscall's arguments decoding.
573 * Fixed semtimedop decoding on s390.
574 * Fixed osf_sigprocmask decoding on alpha.
575 * Fixed ipc and socket subcall decoding on several architectures.
576 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
577 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
578 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
579 * Corrected io_* syscall entries on ARM.
580 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
581 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
582 * Fixed build when libaio-devel is not available.
583 * Fixed configure checks for PTRACE_* constants.
584 * Fixed compilation warnings remained on several architectures.
587 * Removed all non-Linux code. After years of neglect, that dead code
588 just hampered further strace development.
589 * Linux kernel >= 2.6.18 is recommended. Older versions might still
590 work but they haven't been thoroughly tested with this release.
592 Noteworthy changes in release 4.6 (2011-03-15)
593 ==============================================
595 * Changes in behavior
596 * Print diagnostic information about changes in personality mode to
597 standard error instead of standard output.
600 * Implemented a new method of following clone, fork, and vfork
601 syscalls using the Linux kernel's explicit facilities for tracing
602 creation of threads and child processes.
603 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
604 * Implemented decoding of TLS syscalls on m68k.
605 * Implemented biarch support on powerpc64.
606 * Implemented biarch support for getrlimit() and setrlimit().
607 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
608 * Implemented SOL_SCTP socket options decoding.
609 * Added HDIO_* ioctl names.
610 (Addresses Debian bug #450953).
611 * Added LOOP_* ioctl names.
612 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
613 to match Linux 2.6.37.
614 * Updated the list of IPPROTO_* constants to match netinet/in.h.
615 * Implemented decoding of HDIO_* and BLK* ioctls.
616 * Added MicroBlaze architecture support.
617 * Added new syscall entries to match Linux 2.6.37.
618 * Regenerated list of ioctl names from Linux 2.6.37.
619 * Enhanced signal notification decoding.
620 * Documented -C and -D options.
623 * Fixed fetching syscall arguments on m68k.
624 * Fixed an error when judging whether a process has children.
625 * Fixed get/set_robust_list syscall numbers for powerpc.
626 * Fixed a corner case in printing clone flags.
627 * Fixed cross-compiling issues.
628 * Fixed build issues on powerpc64, SH and SPARC.
629 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
630 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
631 fanotify_init, and fanotify_mark syscalls.
632 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
633 * Fixed biarch support in IO dumping.
634 * Fixed raw exit_group decoding.
635 * Fixed decoding of file descriptors on 64-bit architectures.
636 * Fixed a corner case in waitpid handling.
637 (Addresses Red Hat bug #663547).
638 * Fixed stat64 decoding on mips
639 (Addresses Debian bug #599028).
640 * Fixed misleading italics in the manual page.
641 (Addresses Debian bug #589323).
643 Noteworthy changes in release 4.5.20 (2010-04-13)
644 =================================================
647 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
648 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
649 rt_tgsigqueueinfo, perf_event_open.
650 * Enhanced decoding of recently added syscalls on non-x86 architectures
651 by replacing a bare decoder with elaborate parsers enabled earlier
653 * Implemented -C option to combine regular and -c output.
654 (Addresses Debian bug #466196)
655 * Enhanced decoding of mbind and mremap syscalls.
656 * Enhanced SOL_PACKET socket options decoding.
657 * Regenerated list of ioctl names from linux 2.6.33.
658 * Added TILE architecture support.
661 * Fixed build with Linux kernel headers 2.6.32-rc5+.
662 (Addresses Debian bug #560516 and Fedora bug #539044)
663 * Fixed build on mips.
664 * Fixed handling of Linux systems without struct statfs64.
665 * Fixed reporting signal mask by sigreturn on powerpc.
666 * Fixed potential stack buffer overflow in select decoder.
667 (Addresses Fedora bug #556678)
668 * Corrected msgsnd indirect ipccall decoding.
669 * Corrected decoding of 64bit syscalls.
670 (Addresses Debian bug #570603)
671 * Corrected getsockopt decoding on architectures where
672 sizeof(long) > sizeof(int).
673 (Addresses Debian bug #494844)
674 * Corrected decoding of epoll_pwait.
675 (Addresses Debian bug #513014)
676 * Corrected handling of killed threads.
678 Noteworthy changes in release 4.5.19 (2009-10-21)
679 =================================================
681 * Changes in behavior
682 * When command exits, strace now exits with the same exit status.
683 If command is terminated by a signal, strace terminates itself
684 with the same signal, so that strace can be used as a wrapper
685 process transparent to the invoking parent process.
686 When using -p option, the exit status of strace is zero unless
687 there was an unexpected error in doing the tracing.
688 (Addresses Fedora bug #105371 and Debian bug #37665)
691 * Implemented decoding of new Linux syscalls: accept4, dup3,
692 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
693 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
694 * Implemented decoding of accept4 socketcall.
695 * Enhanced prctl decoding.
696 * Enhanced nanosleep decoding.
697 * Enhanced ptrace decoding.
698 * Enhanced futex decoding.
699 * Enhanced CAP_* decoding.
700 * Enhanced SIOCS* ioctls decoding.
701 * Enhanced fcntl F_* flags decoding.
702 * Enhanced semop/semtimedop decoding.
703 * Updated ARM architecture support.
704 * Added Blackfin architecture support.
705 * Added AVR32 architecture support.
706 * Added CRIS architecture support.
707 * Made strace detect when traced process suddenly disappeared.
710 * Fixed syscall numbers for tee and sync_file_range.
711 (Addresses Debian bug #503124)
712 * Fixed several bugs in strings decoder, including potential heap
714 (Addresses Fedora bugs #470529, #478324 and #511035)
715 * Marked sendfile(2) as a network syscall.
716 (Addresses Debian bug #509499)
717 * Fixed accept(2) decoding.
718 (Addresses Debian bug #507573)
719 * Fixed sigtimedwait(2) decoding.
720 * Fixed build on ARM EABI.
721 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
722 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
723 (Addresses Red Hat bug #471169)
724 * Fixed display of 32-bit argv array on 64-bit architectures.
725 (Addresses Fedora bug #519480)
726 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
727 * Fixed HPPA architecture support.
728 (Addresses Debian bugs #437928 and #546619)
733 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
734 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
739 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
740 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
741 * Improved output for prctl system call on Linux.
742 * Improved support for Linux/ARM.
743 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
748 * Improved output for delete_module, futex, and mbind system calls on Linux.
749 * Improved output for SG_IO ioctls on Linux.
750 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
751 eventfd, getcpu, epoll_pwait.
756 * Several biarch improvements.
757 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
758 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
763 * Accept numeric system calls in -e.
768 * Introduce "-e trace=desc".
773 * Better x86-64 support for IA32 processes.
774 * Update PowerPC system calls.
775 * Better printing for Linux aio system calls.
779 * Quick fix release for build issues.
780 * One fix for Linux/ARM system call table.
785 * Print fault address for SIGSEGV/SIGBUS signals when available.
790 * Improve socket ioctl printing.
791 * Update Linux/IA64 syscall list.
792 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
793 * Improve mount flags printing.
794 * Support symbolic printing of x86_64 arch_prctl parameters.
799 * Update syscall tables for Alpha, ARM, HPPA.
800 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
801 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
802 * Improve ioctl command name matching.
803 * Print RTC_* ioctl structure contents.
804 * Support newer RLIMIT_* values.
805 * Print struct cmsghdr details in sendmsg.
810 * Print attribute values in *xattr system calls on Linux.
811 * Include pread and pwrite calls in -e read and -e write tracing.
812 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
813 * Print clock_t values symbolically in Linux clock_* system calls.
817 * Bug fixes, Linux ioctl updates.
818 * David Miller contributed support for Linux/SPARC64.
826 * Update Linux ioctl lists.
827 * Update PF_* and AF_* value lists.
828 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
833 * On Linux using NPTL threads, -p will now attach to all threads in a process.
834 * Handle new mq_* system calls in Linux 2.6.6 and later.
839 * Report some new VM_* bit values on Linux.
840 * Better output for Linux sched_* system calls.
845 * Display multiple ioctl name matches on Linux.
849 * New port to AMD's x86-64 architecture. One strace binary can
850 handle both new x86-64 and old i386 processes.
851 * Fixed support for LFS64 calls.
852 * New switch -E to add/remove environment variables for the command.
853 * Merged s390/s390x port.
854 * Trace an unbounded number of processes.
855 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
856 * Fixed bugs with attach/detach leaving things stopped.
857 * Fixed traced process seeing ECHILD despite live, traced children
858 in waitpid calls with WNOHANG.
859 * Stuart Menefy contributed a port to Linux/SH.
860 * Stephen Thomas contributed a port to Linux/SH64.
861 * Many other bug fixes.
865 * Fix Linux/ia64 support, looks like someone renamed a few things on us
866 * Fix the ioctl setup for Linux, turned out it did not really work.
867 Improve the ioctl extractor as well so we decode some more ones.
871 * compile fixes for Linux/mips
875 * Linux ia64 and hppa ports added
876 * The usual Linux syscall updates (includes 32bit uid/gid support),
877 * Linux ioctl list updated
878 * Support IPv6 scope ids
879 * FreeBSD/i386 port added
880 * UnixWare and Solaris updates
881 * Better support for tracing multithreaded processes in Linux
885 * Compiles on glibc2.0 systems again
886 * Linux/S390 port added
887 * The usual Linux syscall updates
888 * we can follow fork on arm now
892 * Linux/MIPS port added
893 * Lots of Linux updates again
894 * Improved IPv6 support
900 * Compiles on glibc2.0 systems again
904 * Get stat structure properly on Linux 64bit archs
905 * Personalities work again
906 * Compile correctly on SunOS again
912 * Linux (ultra)sparc fixes
919 * add support for more Linux architectures (powerpc, sparc, arm)
920 * support lots more Linux syscalls
921 * fix signal handling
922 * add IPX and IPIP support
923 * check stray syscall after execv
924 * fix hanging children
926 Changes in version 3.1
927 ======================
930 * Linux 68k is supported
931 * Linux alpha is supported
932 * configure is upgraded to autoconf 2.x
933 * using -f in combination with -e now works correctly
934 * output can be piped to a program
935 * tracing setuid programs works better
936 * it is now reasonable to install strace setuid to root in some circumstances
937 * new useful tracing names like file and process to trace whole
938 classes of system calls, e.g. -efile traces all system calls that
939 take a file name as an argument
940 * IPC calls on SunOS 4.1.x are decoded
941 * Linux program memory is reliably dereferenced
942 * Linux decodes at least the name of all syscalls as of pre2.0.4
943 * various cosmetic changes and bug fixes
945 Changes from versions 2.x to version 3.0
946 ========================================
948 * filename arguments are neither abbreviated nor stringified
949 * string arguments are now true C strings using octal instead of hex by default
950 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
951 * by default the output for multiple processes now goes into one file
952 * all structures, vectors, bitsets, etc. use consistent output formats
953 * the -c option now means count calls, -i does what the old -c used to do
955 New Features in version 3.0
956 ===========================
958 * non-ascii strings can be optionally printed entirely in hex
959 * the output format is readable when multiple processes are generating output
960 * exit values are printed in an alignment column
961 * is is possible to suppress messages about attaching and detaching
962 * various tracing features can be enabled on a per syscall/signal/desc basis
963 * selective tracing of syscalls
964 * selective printing of syscall structures
965 * selective abbreviation of long structures on a per syscall basis
966 * selective printing of raw syscall arguments and results
967 * selective tracing of signals
968 * selective dumping of all I/O read from file descriptors
969 * selective dumping of all I/O written to file descriptors
970 * optional counting of time, calls, and errors for each syscall
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