1 Noteworthy changes in release ?.?? (????-??-??)
2 ===============================================
4 * Changes in command line syntax
5 * Syscall classes specified in -e trace= option now have % prefix (like
6 -e trace=%process). Old style class names without leading % are still
7 supported, but considered deprecated now.
10 * Optimized syscall filtering.
11 * Enhanced decoding of sched_setattr syscall.
12 * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs
14 * Added -e trace=/regex option for filtering syscalls using regular
16 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
17 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
18 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
20 * Implemented decoding of statx syscall.
21 * Implemented decoding of NS_* ioctl commands.
22 * Implemented decoding of the remaining V4L2_BUF_TYPE_* types.
23 * Updated lists of ioctl commands from Linux 4.11.
26 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
27 * Fixed the number of arguments and tracing flags of alpha specific syscalls.
29 Noteworthy changes in release 4.16 (2017-02-14)
30 ===============================================
33 * Implemented syscall return value injection (-e inject=SET:retval= option).
34 * Implemented signal injection (-e inject=SET:signal= option).
35 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
36 * Implemented decoding of all SG_* ioctl commands.
37 * Implemented decoding of ustat syscall.
38 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
39 and BPF_PROG_DETACH commands of bpf syscall.
40 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
41 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
43 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
44 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
45 * Updated lists of ioctl commands from Linux 4.10.
46 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
50 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
51 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
52 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
53 and pwritev* syscalls on x32.
54 * Fixed printing of string arguments of getxattr and setxattr syscalls
55 when -s option is used to limit the printed string size.
56 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
58 * Fixed decoding of SG_* and LOOP_* ioctl commands.
59 * Fixed build on mips with musl libc.
60 * Fixed cross-building of ioctlsort.
61 * Applied minor formatting fixes to the manual page.
63 Noteworthy changes in release 4.15 (2016-12-14)
64 ===============================================
67 * Time stamps are now printed according to ISO 8601.
68 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
69 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
70 syscalls is now formatted as an array.
73 * Implemented syscall fault injection (-e fault=... option).
74 * Implemented decoding of DM_* ioctl commands.
75 * Implemented decoding of attr parameter of perf_event_open syscall.
76 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
77 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
78 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
80 * Implemented PTRACE_GETREGS API support on m68k.
81 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
83 * Updated lists of ioctl commands from Linux 4.9.
84 * Added decoding of recently added syscalls on arc, x32, and xtensa.
85 * Enhanced manual page.
88 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
89 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
90 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
91 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
92 setgroups, setns, unshare, and utimes syscalls.
93 * Fixed handling of verbose flag in printing of controls array
94 of struct v4l2_ext_controls.
95 * Fixed omission of field names in the output of capability, sigaction,
96 sigevent, statfs, timespec, timeval, and utimbuf structures.
97 * Fixed printing of unknown syscalls in siginfo structure.
98 * Fixed decoding of ioctl constants on m68k.
99 * Fixed cris architecture support.
100 * Fixed cross build when host compiler does not support the same
101 set of warning flags as the cross compiler.
102 * Fixed build on SLE10 and SLE11.
104 Noteworthy changes in release 4.14 (2016-10-04)
105 ===============================================
107 * Changes in behavior
108 * When using -p option without a command and no processes has been attached,
109 strace exits with exit status 1.
112 * Added printing of the mode argument of open and openat syscalls
113 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
114 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
115 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
116 and aio family syscalls.
117 * Implemented fetching of the 7th subcall argument on mips o32.
118 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
120 * Updated lists of ioctl commands from Linux 4.8.
121 * Added decoding of new syscalls on sh and sh64.
122 * Added RISC-V architecture support.
125 * Marked io_setup and io_destroy as memory mapping related syscalls.
126 * Fixed leakage of placeholder descriptors to tracees.
127 * Fixed printing of mode_t, umode_t, and umask types.
128 * Fixed decoding of iovec arrays without a limit on total data size.
129 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
130 and ipc family syscalls.
131 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
132 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
134 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
135 * Fixed decoding of struct stat64 on sparc64.
136 * Fixed decoding of uid and gid-related syscalls on sparc64.
137 * Fixed decoding of the forth argument of semctl syscall on sparc64.
138 * Fixed values of tty ioctl constants on sparc64.
139 * Fixed sparc personality support on sparc64.
141 Noteworthy changes in release 4.13 (2016-07-26)
142 ===============================================
145 * Implemented a general netlink socket parser.
146 * Enhanced decoding of socket addresses.
147 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
148 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
149 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
150 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
151 and *_MAGIC constants.
152 * Updated lists of ioctl commands from Linux 4.7.
155 * Fixed decoding of pid_t argument of prlimit64 syscall.
156 * Fixed sign extension issues in the parser of struct rusage.
157 * Fixed race condition in decoding of timeout argument of recvmmsg and
158 rt_sigtimedwait syscalls.
159 * Fixed build with fresh linux kernel headers.
161 Noteworthy changes in release 4.12 (2016-05-31)
162 ===============================================
165 * Implemented simultaneous use of -p option and tracing of a command.
166 (addresses Debian bug #549942).
167 * Implemented caching of netlink conversations to reduce amount of time
168 spent in decoding socket details in -yy mode.
169 * Implemented -yy mode decoding of protocol:portid pairs associated with
170 netlink socket descriptors.
171 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
172 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
174 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
175 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
176 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
177 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
178 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
179 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
180 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
181 statfs64, tgkill, waitid, and xattr family syscalls.
182 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
183 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
184 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
185 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
186 * Added decoding of fadvise64 and fadvise64_64 on s390.
187 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
188 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
189 * Updated lists of ioctl commands from Linux 4.6.
192 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
193 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
194 * Fixed decoding of mlock2 syscall on sparc.
195 * Fixed decoding of osf_shmat syscall on alpha.
196 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
197 (addresses Debian bug #485979 and Fedora bug #1298294).
198 * Fixed decoding of preadv syscall in case of short read.
199 * Fixed decoding and dumping of readv syscall in case of short read.
200 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
201 * Fixed decoding of mincore syscall's last argument.
202 * Fixed remaining errors in mapping between syscall numbers and numbers
203 of syscall arguments.
204 * Applied various fixes to strace-graph script.
206 Noteworthy changes in release 4.11 (2015-12-21)
207 ===============================================
209 * Changes in behavior
210 * Some syscalls have different names depending on architecture and
211 personality. In these cases, syscall filtering and printing now
212 consistently uses the names that match corresponding __NR_* kernel
213 macros of the tracee's architecture and personality.
214 * Added strace prefix to all diagnostic messages.
217 * Enhanced and extended test suite.
218 * Implemented reliable tracing of processes whose personality differs
219 from the personality of strace, fixed decoding of 32-bit personality
220 syscalls on 64-bit architectures.
221 * When some data referenced by syscall arguments is irrelevant or cannot
222 be read from tracee's memory, strace now prints its address consistently.
223 * When a syscall is restarted using restart_syscall mechanism, strace now
224 shows the syscall name on architectures that expose this information.
225 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
226 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
227 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
228 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
229 * Optimized decoding of indirect socket syscalls.
230 * Implemented decoding of nanoseconds along with seconds in stat family
231 syscalls (addresses Fedora bug #1251176).
232 * Implemented decoding of struct statfs.f_flags in statfs syscall.
233 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
235 * Implemented decoding of indirect syscall on mips o32.
236 * Implemented decoding of IPPROTO_IP control messages.
237 * Implemented decoding of setsockopt syscall multicast arguments.
238 * Enhanced decoding of struct sigevent.
239 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
240 and v4l2 ioctl syscall arguments.
241 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
242 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
243 sendfile, setsockopt, and shmctl syscalls.
244 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
245 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
246 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
247 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
248 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
249 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
251 * Added Nios II architecture support.
252 * Added new syscall entries to match Linux 4.4.
255 * Fixed potential short read of strings from tracee's memory.
256 * Fixed -qq option in conjunction with -o option.
257 * Fixed filtering of <unavailable> syscalls.
258 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
259 with 64-bit aligned structures.
260 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
261 syscall flags arguments.
262 * Fixed decoding of 4th argument of clock_nanosleep syscall.
263 * Fixed decoding of getpagesize syscall on m68k.
264 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
265 * Fixed decoding of timezone argument of gettimeofday and settimeofday
267 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
269 * Fixed decoding of pipe syscall on alpha and mips.
270 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
271 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
272 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
274 * Fixed decoding of 4th argument of semctl indirect syscall.
275 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
276 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
277 * Fixed decoding of struct dirent on x32.
278 * Fixed decoding of times syscall return value on mips n32 and x32.
279 * Fixed decoding of path argument of umount2 syscall
280 (addresses Debian bug #785050).
281 * Worked around a kernel bug in tracing privileged executables.
282 * Fixed various errors in mapping between syscall numbers and associated
283 information like the number of syscall arguments, the name of syscall,
286 Noteworthy changes in release 4.10 (2015-03-06)
287 ===============================================
290 * Added -yy option to print protocol and address information associated with
292 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
293 recvmsg, sendmmsg, and recvmmsg syscalls.
294 * Implemented full 32-bit decoding of ioctl commands
295 (addresses Debian bug #692913 and Fedora bug #902788).
296 * Implemented PTRACE_GETREGS API support on ia64.
297 * Implemented PTRACE_GETREGS API support on mips.
298 * Implemented PTRACE_GETREGSET API support on s390/s390x.
299 * Implemented decoding of getrandom and seccomp syscalls.
300 * Implemented full decoding of 64-bit capability sets.
301 * Implemented decoding of all prctl commands.
302 * Implemented decoding of parametrized ioctl commands.
303 * Implemented decoding of evdev ioctl commands.
304 * Implemented decoding of v4l ioctl commands.
305 * Implemented decoding of SG_IO v4 ioctl commands.
306 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
307 * Implemented decoding of FALLOC_FL_* fallocate flags.
308 * Implemented decoding of rt_sigreturn signal mask on aarch64,
310 * Enhanced socket decoder to support bluetooth sockets.
311 * Enhanced decoding of unlisted ioctl commands.
312 * Enhanced decoding of getsockopt and setsockopt syscall.
313 * Enhanced decoding of sysinfo syscall.
314 * Enhanced decoding of struct cmsghdr.
315 * Enhanced decoding of wait status.
316 * Enhanced aio support on non-x86 architectures by using external libaio.h.
317 * Added O_TMPFILE to the list of recognized open mode flags.
318 * Updated the list of filesystem type constants that is used in decoding
319 statfs family syscalls.
320 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
322 * Updated lists of signal constants from Linux 3.19.
323 * Updated lists of errno constants from Linux 3.19.
324 * Updated lists of ioctl commands from Linux 3.9.
325 * Added new syscall entries to match Linux 3.19.
328 * Fixed various errors in mapping between syscall numbers and associated
329 information like the number of syscall arguments, the name of syscall,
331 * Fixed quoting issues in printing descriptors, filenames, network interface
332 names, struct utsname members, device/volume names of BLK* ioctl commands.
333 * Fixed uid_t/git_t decoding.
334 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
335 * Fixed potential open flags truncation on some architectures.
336 * Fixed decoding of struct ifreq.ifr_name.
337 * Fixed decoding of SIOCSIFNAME ioctl command.
338 * Fixed decoding of RENAME_* renameat2 flags.
339 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
340 * Fixed decoding of indirect ipc subcalls on some architectures.
341 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
342 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
343 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
344 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
345 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
346 sparc, sparc64, mips, and s390.
347 * Fixed instruction pointer output (-i option) on architectures that support
348 several personalities.
349 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
351 * Fixed build on systems where struct sigaction has no sa_restorer member.
352 * Fixed build with uclibc and musl libc.
355 * Linux kernel >= 2.5.46 is required.
356 Older versions without a decent PTRACE_SETOPTIONS support will not work.
357 * On mips, linux kernel >= 2.6.15 is required.
358 Older versions without a decent PTRACE_GETREGS support will not work.
359 * On s390 and s390x, linux kernel >= 2.6.27 is required.
360 Older versions without a decent PTRACE_GETREGSET support will not work.
362 Noteworthy changes in release 4.9 (2014-08-15)
363 ==============================================
365 * Changes in behavior
366 * Disabled OABI support on ARM EABI systems by default,
367 added --enable-arm-oabi option to enable it at configure time.
370 * Added experimental -k option to print stack trace after each traced syscall.
371 * Added -w option to produce stats on syscall latency.
372 (addresses Debian bug #457497).
373 * Added ARC architecture support.
374 * Added PTRACE_GETREGS API support on PowerPC.
375 * Enhanced Bionic libc and musl libc support.
376 * Enhanced tracing of x86 personality processes on x86_64 and x32.
377 * Enhanced tracing of ARM personality processes on AArch64.
378 * Enhanced 32/64bit personality detection on PowerPC.
379 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
380 renameat2, and request_key syscalls.
381 * Robustified decoding of select, pselect, and io_submit syscalls.
382 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
383 setdomainname, sethostname, setns, and sync_file_range syscalls.
384 * Enhanced decoding of signal bitmasks.
385 * Enhanced decoding of file descriptors.
386 * Enhanced siginfo_t decoding.
387 * Enhanced PF_NETLINK decoding.
388 * Updated CLOCK_* constants
389 (addresses Fedora bug #1088455).
390 * Added new syscall entries to match Linux 3.16.
393 * Added shmat and shmdt to the set of memory mapping related syscalls.
394 * Fixed detaching from stopped processes.
395 * Fixed fanotify_mark decoding on 32bit architectures.
396 * Fixed offset decoding in preadv and pwritev syscalls.
397 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
398 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
399 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
400 (addresses Fedora bug #993384).
401 * Miscellaneous corrections in the manual page.
402 (Addresses Debian bug #725987).
404 Noteworthy changes in release 4.8 (2013-06-03)
405 ==============================================
407 * Changes in behavior
408 * In case of normal strace termination, when the trace output is
409 redirected to a pipe, strace now closes it and waits for the pipe
410 process termination before exit.
413 * Implemented tracing using PTRACE_SEIZE API (when available).
414 * Implemented more reliable PTRACE_GETREGSET-based process personality
415 detection on x86-64 and x32 (when available).
416 * Added -e trace=memory option for tracing memory mapping related syscalls.
417 * Documented -b option.
418 * Allowed exit status messages to be suppressed by giving -q option twice.
419 * Added AArch64 architecture support
420 (addresses Debian bug #693074 and Fedora bug #969858).
421 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
422 * Added tilegx personality support for Tile.
423 * Enhanced support of NOMMU architectures.
424 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
426 * Added new syscall entries to match Linux 3.9.
427 * Regenerated the list of common ioctl names from Linux 3.9.
428 * Updated the list of errno constants.
429 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
430 PTRACE_O_*, and TCP_* constants.
431 * Implemented decoding of UBI ioctls.
432 * Removed redundant "*32" ioctl names.
435 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
436 (addresses Fedora bug #659382).
437 * Fixed kernel release string parsing
438 (addresses Debian bug #702309).
439 * Fixed decoding of *xattr syscalls
440 (addresses Fedora bug #885233).
441 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
442 (addresses Fedora bug #912790).
443 * Fixed tracing forks on SPARC.
444 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
445 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
446 and truncate64 syscalls.
447 * Fixed categories of multiple syscalls on most of supported architectures.
448 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
449 * Fixed decoding of multiple 32-bit personality syscalls on x32.
450 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
451 S390x, and Tile architectures.
452 * Fixed semtimedop decoding on S390x.
453 * Fixed sram_alloc decoding on Blackfin.
454 * Fixed build when process_vm_readv is a stab.
455 * Fixed build with older versions of libaio.h.
457 Noteworthy changes in release 4.7 (2012-05-02)
458 ==============================================
460 * Changes in behavior
461 * strace no longer suspends waitpid until there is a child
462 for waitpid'ing process to collect status from.
463 * strace no longer detaches from a tracee which is supposed
465 * strace now issues a new message: "+++ exited with EXITCODE +++"
466 which shows exact moment strace got exit notification,
467 analogous to existing "+++ killed by SIG +++" message.
470 * Added x32 personality support (x86_64 architecture).
471 * Added -y and -P options to print file descriptor paths and
472 filter by those paths.
473 * Added -I option to control strace interactivity.
474 * Allowed -p option to take comma or whitespace-separated list of PIDs.
475 * Added strace_log_merge script helper to merge timestamped "strace -ff"
477 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
478 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
479 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
480 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
481 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
482 listxattr, setrlimit and swapon syscalls.
483 * Implemented decoding of loop and mtd ioctls.
484 * Added syscall entries for new linux syscalls.
485 * Added syscall entries for direct socket system calls on powerpc.
486 * Updated the list of errno constants.
487 * Updated lists of MSG_*, STA_*, and TCP_* constants.
488 * Regenerated the list of ioctl names from Linux 3.3.
489 * Enhanced switching between processes with different personalities.
490 * Enhanced signals reporting by using short signal names.
491 * Made ERESTART* messages more descriptive.
492 * Made parsing of numbers from strings more robust.
493 * Added support for compat_statfs64 and statfs64.f_flags.
494 * Changed read of data blocks to use single process_vm_readv syscall
495 (when available) instead of several PTRACE_PEEKDATA operations.
496 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
497 operation instead of several PTRACE_PEEKUSER operations.
498 * Applied various optimizations to make strace work faster.
501 * Implemented proper handling of real SIGTRAPs on kernels supporting
502 PTRACE_O_TRACESYSGOOD.
503 (Addresses Fedora bug #162774).
504 * Fixed sockaddr_un.sun_path name in decoded output.
505 (Addresses Debian bug #554946).
506 * Fixed to avoid potential core file clobbering on exit.
507 (Addresses Debian bug #656398).
508 * Fixed a typo in documentation.
509 (Addresses Debian bug #653309).
510 * Fixed decoding of timer id returned by timer_create.
511 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
512 * Fixed *at syscalls flags decoding.
513 * Fixed ARM EABI 64-bit syscall's arguments decoding.
514 * Fixed semtimedop decoding on s390.
515 * Fixed osf_sigprocmask decoding on alpha.
516 * Fixed ipc and socket subcall decoding on several architectures.
517 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
518 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
519 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
520 * Corrected io_* syscall entries on ARM.
521 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
522 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
523 * Fixed build when libaio-devel is not available.
524 * Fixed configure checks for PTRACE_* constants.
525 * Fixed compilation warnings remained on several architectures.
528 * Removed all non-Linux code. After years of neglect, that dead code
529 just hampered further strace development.
530 * Linux kernel >= 2.6.18 is recommended. Older versions might still
531 work but they haven't been thoroughly tested with this release.
533 Noteworthy changes in release 4.6 (2011-03-15)
534 ==============================================
536 * Changes in behavior
537 * Print diagnostic information about changes in personality mode to
538 standard error instead of standard output.
541 * Implemented a new method of following clone, fork, and vfork
542 syscalls using the Linux kernel's explicit facilities for tracing
543 creation of threads and child processes.
544 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
545 * Implemented decoding of TLS syscalls on m68k.
546 * Implemented biarch support on powerpc64.
547 * Implemented biarch support for getrlimit() and setrlimit().
548 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
549 * Implemented SOL_SCTP socket options decoding.
550 * Added HDIO_* ioctl names.
551 (Addresses Debian bug #450953).
552 * Added LOOP_* ioctl names.
553 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
554 to match Linux 2.6.37.
555 * Updated the list of IPPROTO_* constants to match netinet/in.h.
556 * Implemented decoding of HDIO_* and BLK* ioctls.
557 * Added MicroBlaze architecture support.
558 * Added new syscall entries to match Linux 2.6.37.
559 * Regenerated list of ioctl names from Linux 2.6.37.
560 * Enhanced signal notification decoding.
561 * Documented -C and -D options.
564 * Fixed fetching syscall arguments on m68k.
565 * Fixed an error when judging whether a process has children.
566 * Fixed get/set_robust_list syscall numbers for powerpc.
567 * Fixed a corner case in printing clone flags.
568 * Fixed cross-compiling issues.
569 * Fixed build issues on powerpc64, SH and SPARC.
570 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
571 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
572 fanotify_init, and fanotify_mark syscalls.
573 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
574 * Fixed biarch support in IO dumping.
575 * Fixed raw exit_group decoding.
576 * Fixed decoding of file descriptors on 64-bit architectures.
577 * Fixed a corner case in waitpid handling.
578 (Addresses Red Hat bug #663547).
579 * Fixed stat64 decoding on mips
580 (Addresses Debian bug #599028).
581 * Fixed misleading italics in the manual page.
582 (Addresses Debian bug #589323).
584 Noteworthy changes in release 4.5.20 (2010-04-13)
585 =================================================
588 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
589 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
590 rt_tgsigqueueinfo, perf_event_open.
591 * Enhanced decoding of recently added syscalls on non-x86 architectures
592 by replacing a bare decoder with elaborate parsers enabled earlier
594 * Implemented -C option to combine regular and -c output.
595 (Addresses Debian bug #466196)
596 * Enhanced decoding of mbind and mremap syscalls.
597 * Enhanced SOL_PACKET socket options decoding.
598 * Regenerated list of ioctl names from linux 2.6.33.
599 * Added TILE architecture support.
602 * Fixed build with Linux kernel headers 2.6.32-rc5+.
603 (Addresses Debian bug #560516 and Fedora bug #539044)
604 * Fixed build on mips.
605 * Fixed handling of Linux systems without struct statfs64.
606 * Fixed reporting signal mask by sigreturn on powerpc.
607 * Fixed potential stack buffer overflow in select decoder.
608 (Addresses Fedora bug #556678)
609 * Corrected msgsnd indirect ipccall decoding.
610 * Corrected decoding of 64bit syscalls.
611 (Addresses Debian bug #570603)
612 * Corrected getsockopt decoding on architectures where
613 sizeof(long) > sizeof(int).
614 (Addresses Debian bug #494844)
615 * Corrected decoding of epoll_pwait.
616 (Addresses Debian bug #513014)
617 * Corrected handling of killed threads.
619 Noteworthy changes in release 4.5.19 (2009-10-21)
620 =================================================
622 * Changes in behavior
623 * When command exits, strace now exits with the same exit status.
624 If command is terminated by a signal, strace terminates itself
625 with the same signal, so that strace can be used as a wrapper
626 process transparent to the invoking parent process.
627 When using -p option, the exit status of strace is zero unless
628 there was an unexpected error in doing the tracing.
629 (Addresses Fedora bug #105371 and Debian bug #37665)
632 * Implemented decoding of new Linux syscalls: accept4, dup3,
633 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
634 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
635 * Implemented decoding of accept4 socketcall.
636 * Enhanced prctl decoding.
637 * Enhanced nanosleep decoding.
638 * Enhanced ptrace decoding.
639 * Enhanced futex decoding.
640 * Enhanced CAP_* decoding.
641 * Enhanced SIOCS* ioctls decoding.
642 * Enhanced fcntl F_* flags decoding.
643 * Enhanced semop/semtimedop decoding.
644 * Updated ARM architecture support.
645 * Added Blackfin architecture support.
646 * Added AVR32 architecture support.
647 * Added CRIS architecture support.
648 * Made strace detect when traced process suddenly disappeared.
651 * Fixed syscall numbers for tee and sync_file_range.
652 (Addresses Debian bug #503124)
653 * Fixed several bugs in strings decoder, including potential heap
655 (Addresses Fedora bugs #470529, #478324 and #511035)
656 * Marked sendfile(2) as a network syscall.
657 (Addresses Debian bug #509499)
658 * Fixed accept(2) decoding.
659 (Addresses Debian bug #507573)
660 * Fixed sigtimedwait(2) decoding.
661 * Fixed build on ARM EABI.
662 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
663 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
664 (Addresses Red Hat bug #471169)
665 * Fixed display of 32-bit argv array on 64-bit architectures.
666 (Addresses Fedora bug #519480)
667 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
668 * Fixed HPPA architecture support.
669 (Addresses Debian bugs #437928 and #546619)
674 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
675 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
680 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
681 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
682 * Improved output for prctl system call on Linux.
683 * Improved support for Linux/ARM.
684 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
689 * Improved output for delete_module, futex, and mbind system calls on Linux.
690 * Improved output for SG_IO ioctls on Linux.
691 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
692 eventfd, getcpu, epoll_pwait.
697 * Several biarch improvements.
698 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
699 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
704 * Accept numeric system calls in -e.
709 * Introduce "-e trace=desc".
714 * Better x86-64 support for IA32 processes.
715 * Update PowerPC system calls.
716 * Better printing for Linux aio system calls.
720 * Quick fix release for build issues.
721 * One fix for Linux/ARM system call table.
726 * Print fault address for SIGSEGV/SIGBUS signals when available.
731 * Improve socket ioctl printing.
732 * Update Linux/IA64 syscall list.
733 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
734 * Improve mount flags printing.
735 * Support symbolic printing of x86_64 arch_prctl parameters.
740 * Update syscall tables for Alpha, ARM, HPPA.
741 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
742 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
743 * Improve ioctl command name matching.
744 * Print RTC_* ioctl structure contents.
745 * Support newer RLIMIT_* values.
746 * Print struct cmsghdr details in sendmsg.
751 * Print attribute values in *xattr system calls on Linux.
752 * Include pread and pwrite calls in -e read and -e write tracing.
753 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
754 * Print clock_t values symbolically in Linux clock_* system calls.
758 * Bug fixes, Linux ioctl updates.
759 * David Miller contributed support for Linux/SPARC64.
767 * Update Linux ioctl lists.
768 * Update PF_* and AF_* value lists.
769 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
774 * On Linux using NPTL threads, -p will now attach to all threads in a process.
775 * Handle new mq_* system calls in Linux 2.6.6 and later.
780 * Report some new VM_* bit values on Linux.
781 * Better output for Linux sched_* system calls.
786 * Display multiple ioctl name matches on Linux.
790 * New port to AMD's x86-64 architecture. One strace binary can
791 handle both new x86-64 and old i386 processes.
792 * Fixed support for LFS64 calls.
793 * New switch -E to add/remove environment variables for the command.
794 * Merged s390/s390x port.
795 * Trace an unbounded number of processes.
796 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
797 * Fixed bugs with attach/detach leaving things stopped.
798 * Fixed traced process seeing ECHILD despite live, traced children
799 in waitpid calls with WNOHANG.
800 * Stuart Menefy contributed a port to Linux/SH.
801 * Stephen Thomas contributed a port to Linux/SH64.
802 * Many other bug fixes.
806 * Fix Linux/ia64 support, looks like someone renamed a few things on us
807 * Fix the ioctl setup for Linux, turned out it did not really work.
808 Improve the ioctl extracter as well so we decode some more ones.
812 * compile fixes for Linux/mips
816 * Linux ia64 and hppa ports added
817 * The usual Linux syscall updates (includes 32bit uid/gid support),
818 * Linux ioctl list updated
819 * Support IPv6 scope ids
820 * FreeBSD/i386 port added
821 * UnixWare and Solaris updates
822 * Better support for tracing multithreaded processes in Linux
826 * Compiles on glibc2.0 systems again
827 * Linux/S390 port added
828 * The usual Linux syscall updates
829 * we can follow fork on arm now
833 * Linux/MIPS port added
834 * Lots of Linux updates again
835 * Improved IPv6 support
841 * Compiles on glibc2.0 systems again
845 * Get stat structure properly on Linux 64bit archs
846 * Personalities work again
847 * Compile correctly on SunOS again
853 * Linux (ultra)sparc fixes
860 * add support for more Linux architectures (powerpc, sparc, arm)
861 * support lots more Linux syscalls
862 * fix signal handling
863 * add IPX and IPIP support
864 * check stray syscall after execv
865 * fix hanging children
867 Changes in version 3.1
868 ======================
871 * Linux 68k is supported
872 * Linux alpha is supported
873 * configure is upgraded to autoconf 2.x
874 * using -f in combination with -e now works correctly
875 * output can be piped to a program
876 * tracing setuid programs works better
877 * it is now reasonable to install strace setuid to root in some circumstances
878 * new useful tracing names like file and process to trace whole
879 classes of system calls, e.g. -efile traces all system calls that
880 take a file name as an argument
881 * IPC calls on SunOS 4.1.x are decoded
882 * Linux program memory is reliably dereferenced
883 * Linux decodes at least the name of all syscalls as of pre2.0.4
884 * various cosmetic changes and bug fixes
886 Changes from versions 2.x to version 3.0
887 ========================================
889 * filename arguments are neither abbreviated nor stringified
890 * string arguments are now true C strings using octal instead of hex by default
891 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
892 * by default the output for multiple processes now goes into one file
893 * all structures, vectors, bitsets, etc. use consistent output formats
894 * the -c option now means count calls, -i does what the old -c used to do
896 New Features in version 3.0
897 ===========================
899 * non-ascii strings can be optionally printed entirely in hex
900 * the output format is readable when mutiple processes are generating output
901 * exit values are printed in an alignment column
902 * is is possible to suppress messages about attaching and detaching
903 * various tracing features can be enabled on a per syscall/signal/desc basis
904 * selective tracing of syscalls
905 * selective printing of syscall structures
906 * selective abbreviation of long structures on a per syscall basis
907 * selective printing of raw syscall arguments and results
908 * selective tracing of signals
909 * selective dumping of all I/O read from file descriptors
910 * selective dumping of all I/O written to file descriptors
911 * optional counting of time, calls, and errors for each syscall