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 * Implemented decoding of NLMSG_ERROR netlink messages.
24 * Updated lists of ioctl commands from Linux 4.11.
27 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
28 * Fixed the number of arguments and tracing flags of alpha specific syscalls.
29 * Fixed decoding of netlink messages received within struct msghdr.
31 Noteworthy changes in release 4.16 (2017-02-14)
32 ===============================================
35 * Implemented syscall return value injection (-e inject=SET:retval= option).
36 * Implemented signal injection (-e inject=SET:signal= option).
37 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
38 * Implemented decoding of all SG_* ioctl commands.
39 * Implemented decoding of ustat syscall.
40 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
41 and BPF_PROG_DETACH commands of bpf syscall.
42 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
43 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
45 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
46 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
47 * Updated lists of ioctl commands from Linux 4.10.
48 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
52 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
53 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
54 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
55 and pwritev* syscalls on x32.
56 * Fixed printing of string arguments of getxattr and setxattr syscalls
57 when -s option is used to limit the printed string size.
58 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
60 * Fixed decoding of SG_* and LOOP_* ioctl commands.
61 * Fixed build on mips with musl libc.
62 * Fixed cross-building of ioctlsort.
63 * Applied minor formatting fixes to the manual page.
65 Noteworthy changes in release 4.15 (2016-12-14)
66 ===============================================
69 * Time stamps are now printed according to ISO 8601.
70 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
71 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
72 syscalls is now formatted as an array.
75 * Implemented syscall fault injection (-e fault=... option).
76 * Implemented decoding of DM_* ioctl commands.
77 * Implemented decoding of attr parameter of perf_event_open syscall.
78 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
79 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
80 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
82 * Implemented PTRACE_GETREGS API support on m68k.
83 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
85 * Updated lists of ioctl commands from Linux 4.9.
86 * Added decoding of recently added syscalls on arc, x32, and xtensa.
87 * Enhanced manual page.
90 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
91 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
92 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
93 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
94 setgroups, setns, unshare, and utimes syscalls.
95 * Fixed handling of verbose flag in printing of controls array
96 of struct v4l2_ext_controls.
97 * Fixed omission of field names in the output of capability, sigaction,
98 sigevent, statfs, timespec, timeval, and utimbuf structures.
99 * Fixed printing of unknown syscalls in siginfo structure.
100 * Fixed decoding of ioctl constants on m68k.
101 * Fixed cris architecture support.
102 * Fixed cross build when host compiler does not support the same
103 set of warning flags as the cross compiler.
104 * Fixed build on SLE10 and SLE11.
106 Noteworthy changes in release 4.14 (2016-10-04)
107 ===============================================
109 * Changes in behavior
110 * When using -p option without a command and no processes has been attached,
111 strace exits with exit status 1.
114 * Added printing of the mode argument of open and openat syscalls
115 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
116 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
117 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
118 and aio family syscalls.
119 * Implemented fetching of the 7th subcall argument on mips o32.
120 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
122 * Updated lists of ioctl commands from Linux 4.8.
123 * Added decoding of new syscalls on sh and sh64.
124 * Added RISC-V architecture support.
127 * Marked io_setup and io_destroy as memory mapping related syscalls.
128 * Fixed leakage of placeholder descriptors to tracees.
129 * Fixed printing of mode_t, umode_t, and umask types.
130 * Fixed decoding of iovec arrays without a limit on total data size.
131 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
132 and ipc family syscalls.
133 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
134 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
136 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
137 * Fixed decoding of struct stat64 on sparc64.
138 * Fixed decoding of uid and gid-related syscalls on sparc64.
139 * Fixed decoding of the forth argument of semctl syscall on sparc64.
140 * Fixed values of tty ioctl constants on sparc64.
141 * Fixed sparc personality support on sparc64.
143 Noteworthy changes in release 4.13 (2016-07-26)
144 ===============================================
147 * Implemented a general netlink socket parser.
148 * Enhanced decoding of socket addresses.
149 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
150 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
151 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
152 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
153 and *_MAGIC constants.
154 * Updated lists of ioctl commands from Linux 4.7.
157 * Fixed decoding of pid_t argument of prlimit64 syscall.
158 * Fixed sign extension issues in the parser of struct rusage.
159 * Fixed race condition in decoding of timeout argument of recvmmsg and
160 rt_sigtimedwait syscalls.
161 * Fixed build with fresh linux kernel headers.
163 Noteworthy changes in release 4.12 (2016-05-31)
164 ===============================================
167 * Implemented simultaneous use of -p option and tracing of a command.
168 (addresses Debian bug #549942).
169 * Implemented caching of netlink conversations to reduce amount of time
170 spent in decoding socket details in -yy mode.
171 * Implemented -yy mode decoding of protocol:portid pairs associated with
172 netlink socket descriptors.
173 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
174 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
176 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
177 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
178 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
179 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
180 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
181 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
182 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
183 statfs64, tgkill, waitid, and xattr family syscalls.
184 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
185 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
186 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
187 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
188 * Added decoding of fadvise64 and fadvise64_64 on s390.
189 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
190 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
191 * Updated lists of ioctl commands from Linux 4.6.
194 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
195 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
196 * Fixed decoding of mlock2 syscall on sparc.
197 * Fixed decoding of osf_shmat syscall on alpha.
198 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
199 (addresses Debian bug #485979 and Fedora bug #1298294).
200 * Fixed decoding of preadv syscall in case of short read.
201 * Fixed decoding and dumping of readv syscall in case of short read.
202 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
203 * Fixed decoding of mincore syscall's last argument.
204 * Fixed remaining errors in mapping between syscall numbers and numbers
205 of syscall arguments.
206 * Applied various fixes to strace-graph script.
208 Noteworthy changes in release 4.11 (2015-12-21)
209 ===============================================
211 * Changes in behavior
212 * Some syscalls have different names depending on architecture and
213 personality. In these cases, syscall filtering and printing now
214 consistently uses the names that match corresponding __NR_* kernel
215 macros of the tracee's architecture and personality.
216 * Added strace prefix to all diagnostic messages.
219 * Enhanced and extended test suite.
220 * Implemented reliable tracing of processes whose personality differs
221 from the personality of strace, fixed decoding of 32-bit personality
222 syscalls on 64-bit architectures.
223 * When some data referenced by syscall arguments is irrelevant or cannot
224 be read from tracee's memory, strace now prints its address consistently.
225 * When a syscall is restarted using restart_syscall mechanism, strace now
226 shows the syscall name on architectures that expose this information.
227 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
228 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
229 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
230 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
231 * Optimized decoding of indirect socket syscalls.
232 * Implemented decoding of nanoseconds along with seconds in stat family
233 syscalls (addresses Fedora bug #1251176).
234 * Implemented decoding of struct statfs.f_flags in statfs syscall.
235 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
237 * Implemented decoding of indirect syscall on mips o32.
238 * Implemented decoding of IPPROTO_IP control messages.
239 * Implemented decoding of setsockopt syscall multicast arguments.
240 * Enhanced decoding of struct sigevent.
241 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
242 and v4l2 ioctl syscall arguments.
243 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
244 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
245 sendfile, setsockopt, and shmctl syscalls.
246 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
247 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
248 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
249 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
250 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
251 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
253 * Added Nios II architecture support.
254 * Added new syscall entries to match Linux 4.4.
257 * Fixed potential short read of strings from tracee's memory.
258 * Fixed -qq option in conjunction with -o option.
259 * Fixed filtering of <unavailable> syscalls.
260 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
261 with 64-bit aligned structures.
262 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
263 syscall flags arguments.
264 * Fixed decoding of 4th argument of clock_nanosleep syscall.
265 * Fixed decoding of getpagesize syscall on m68k.
266 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
267 * Fixed decoding of timezone argument of gettimeofday and settimeofday
269 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
271 * Fixed decoding of pipe syscall on alpha and mips.
272 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
273 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
274 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
276 * Fixed decoding of 4th argument of semctl indirect syscall.
277 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
278 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
279 * Fixed decoding of struct dirent on x32.
280 * Fixed decoding of times syscall return value on mips n32 and x32.
281 * Fixed decoding of path argument of umount2 syscall
282 (addresses Debian bug #785050).
283 * Worked around a kernel bug in tracing privileged executables.
284 * Fixed various errors in mapping between syscall numbers and associated
285 information like the number of syscall arguments, the name of syscall,
288 Noteworthy changes in release 4.10 (2015-03-06)
289 ===============================================
292 * Added -yy option to print protocol and address information associated with
294 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
295 recvmsg, sendmmsg, and recvmmsg syscalls.
296 * Implemented full 32-bit decoding of ioctl commands
297 (addresses Debian bug #692913 and Fedora bug #902788).
298 * Implemented PTRACE_GETREGS API support on ia64.
299 * Implemented PTRACE_GETREGS API support on mips.
300 * Implemented PTRACE_GETREGSET API support on s390/s390x.
301 * Implemented decoding of getrandom and seccomp syscalls.
302 * Implemented full decoding of 64-bit capability sets.
303 * Implemented decoding of all prctl commands.
304 * Implemented decoding of parametrized ioctl commands.
305 * Implemented decoding of evdev ioctl commands.
306 * Implemented decoding of v4l ioctl commands.
307 * Implemented decoding of SG_IO v4 ioctl commands.
308 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
309 * Implemented decoding of FALLOC_FL_* fallocate flags.
310 * Implemented decoding of rt_sigreturn signal mask on aarch64,
312 * Enhanced socket decoder to support bluetooth sockets.
313 * Enhanced decoding of unlisted ioctl commands.
314 * Enhanced decoding of getsockopt and setsockopt syscall.
315 * Enhanced decoding of sysinfo syscall.
316 * Enhanced decoding of struct cmsghdr.
317 * Enhanced decoding of wait status.
318 * Enhanced aio support on non-x86 architectures by using external libaio.h.
319 * Added O_TMPFILE to the list of recognized open mode flags.
320 * Updated the list of filesystem type constants that is used in decoding
321 statfs family syscalls.
322 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
324 * Updated lists of signal constants from Linux 3.19.
325 * Updated lists of errno constants from Linux 3.19.
326 * Updated lists of ioctl commands from Linux 3.9.
327 * Added new syscall entries to match Linux 3.19.
330 * Fixed various errors in mapping between syscall numbers and associated
331 information like the number of syscall arguments, the name of syscall,
333 * Fixed quoting issues in printing descriptors, filenames, network interface
334 names, struct utsname members, device/volume names of BLK* ioctl commands.
335 * Fixed uid_t/git_t decoding.
336 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
337 * Fixed potential open flags truncation on some architectures.
338 * Fixed decoding of struct ifreq.ifr_name.
339 * Fixed decoding of SIOCSIFNAME ioctl command.
340 * Fixed decoding of RENAME_* renameat2 flags.
341 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
342 * Fixed decoding of indirect ipc subcalls on some architectures.
343 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
344 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
345 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
346 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
347 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
348 sparc, sparc64, mips, and s390.
349 * Fixed instruction pointer output (-i option) on architectures that support
350 several personalities.
351 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
353 * Fixed build on systems where struct sigaction has no sa_restorer member.
354 * Fixed build with uclibc and musl libc.
357 * Linux kernel >= 2.5.46 is required.
358 Older versions without a decent PTRACE_SETOPTIONS support will not work.
359 * On mips, linux kernel >= 2.6.15 is required.
360 Older versions without a decent PTRACE_GETREGS support will not work.
361 * On s390 and s390x, linux kernel >= 2.6.27 is required.
362 Older versions without a decent PTRACE_GETREGSET support will not work.
364 Noteworthy changes in release 4.9 (2014-08-15)
365 ==============================================
367 * Changes in behavior
368 * Disabled OABI support on ARM EABI systems by default,
369 added --enable-arm-oabi option to enable it at configure time.
372 * Added experimental -k option to print stack trace after each traced syscall.
373 * Added -w option to produce stats on syscall latency.
374 (addresses Debian bug #457497).
375 * Added ARC architecture support.
376 * Added PTRACE_GETREGS API support on PowerPC.
377 * Enhanced Bionic libc and musl libc support.
378 * Enhanced tracing of x86 personality processes on x86_64 and x32.
379 * Enhanced tracing of ARM personality processes on AArch64.
380 * Enhanced 32/64bit personality detection on PowerPC.
381 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
382 renameat2, and request_key syscalls.
383 * Robustified decoding of select, pselect, and io_submit syscalls.
384 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
385 setdomainname, sethostname, setns, and sync_file_range syscalls.
386 * Enhanced decoding of signal bitmasks.
387 * Enhanced decoding of file descriptors.
388 * Enhanced siginfo_t decoding.
389 * Enhanced PF_NETLINK decoding.
390 * Updated CLOCK_* constants
391 (addresses Fedora bug #1088455).
392 * Added new syscall entries to match Linux 3.16.
395 * Added shmat and shmdt to the set of memory mapping related syscalls.
396 * Fixed detaching from stopped processes.
397 * Fixed fanotify_mark decoding on 32bit architectures.
398 * Fixed offset decoding in preadv and pwritev syscalls.
399 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
400 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
401 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
402 (addresses Fedora bug #993384).
403 * Miscellaneous corrections in the manual page.
404 (Addresses Debian bug #725987).
406 Noteworthy changes in release 4.8 (2013-06-03)
407 ==============================================
409 * Changes in behavior
410 * In case of normal strace termination, when the trace output is
411 redirected to a pipe, strace now closes it and waits for the pipe
412 process termination before exit.
415 * Implemented tracing using PTRACE_SEIZE API (when available).
416 * Implemented more reliable PTRACE_GETREGSET-based process personality
417 detection on x86-64 and x32 (when available).
418 * Added -e trace=memory option for tracing memory mapping related syscalls.
419 * Documented -b option.
420 * Allowed exit status messages to be suppressed by giving -q option twice.
421 * Added AArch64 architecture support
422 (addresses Debian bug #693074 and Fedora bug #969858).
423 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
424 * Added tilegx personality support for Tile.
425 * Enhanced support of NOMMU architectures.
426 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
428 * Added new syscall entries to match Linux 3.9.
429 * Regenerated the list of common ioctl names from Linux 3.9.
430 * Updated the list of errno constants.
431 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
432 PTRACE_O_*, and TCP_* constants.
433 * Implemented decoding of UBI ioctls.
434 * Removed redundant "*32" ioctl names.
437 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
438 (addresses Fedora bug #659382).
439 * Fixed kernel release string parsing
440 (addresses Debian bug #702309).
441 * Fixed decoding of *xattr syscalls
442 (addresses Fedora bug #885233).
443 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
444 (addresses Fedora bug #912790).
445 * Fixed tracing forks on SPARC.
446 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
447 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
448 and truncate64 syscalls.
449 * Fixed categories of multiple syscalls on most of supported architectures.
450 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
451 * Fixed decoding of multiple 32-bit personality syscalls on x32.
452 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
453 S390x, and Tile architectures.
454 * Fixed semtimedop decoding on S390x.
455 * Fixed sram_alloc decoding on Blackfin.
456 * Fixed build when process_vm_readv is a stab.
457 * Fixed build with older versions of libaio.h.
459 Noteworthy changes in release 4.7 (2012-05-02)
460 ==============================================
462 * Changes in behavior
463 * strace no longer suspends waitpid until there is a child
464 for waitpid'ing process to collect status from.
465 * strace no longer detaches from a tracee which is supposed
467 * strace now issues a new message: "+++ exited with EXITCODE +++"
468 which shows exact moment strace got exit notification,
469 analogous to existing "+++ killed by SIG +++" message.
472 * Added x32 personality support (x86_64 architecture).
473 * Added -y and -P options to print file descriptor paths and
474 filter by those paths.
475 * Added -I option to control strace interactivity.
476 * Allowed -p option to take comma or whitespace-separated list of PIDs.
477 * Added strace_log_merge script helper to merge timestamped "strace -ff"
479 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
480 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
481 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
482 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
483 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
484 listxattr, setrlimit and swapon syscalls.
485 * Implemented decoding of loop and mtd ioctls.
486 * Added syscall entries for new linux syscalls.
487 * Added syscall entries for direct socket system calls on powerpc.
488 * Updated the list of errno constants.
489 * Updated lists of MSG_*, STA_*, and TCP_* constants.
490 * Regenerated the list of ioctl names from Linux 3.3.
491 * Enhanced switching between processes with different personalities.
492 * Enhanced signals reporting by using short signal names.
493 * Made ERESTART* messages more descriptive.
494 * Made parsing of numbers from strings more robust.
495 * Added support for compat_statfs64 and statfs64.f_flags.
496 * Changed read of data blocks to use single process_vm_readv syscall
497 (when available) instead of several PTRACE_PEEKDATA operations.
498 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
499 operation instead of several PTRACE_PEEKUSER operations.
500 * Applied various optimizations to make strace work faster.
503 * Implemented proper handling of real SIGTRAPs on kernels supporting
504 PTRACE_O_TRACESYSGOOD.
505 (Addresses Fedora bug #162774).
506 * Fixed sockaddr_un.sun_path name in decoded output.
507 (Addresses Debian bug #554946).
508 * Fixed to avoid potential core file clobbering on exit.
509 (Addresses Debian bug #656398).
510 * Fixed a typo in documentation.
511 (Addresses Debian bug #653309).
512 * Fixed decoding of timer id returned by timer_create.
513 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
514 * Fixed *at syscalls flags decoding.
515 * Fixed ARM EABI 64-bit syscall's arguments decoding.
516 * Fixed semtimedop decoding on s390.
517 * Fixed osf_sigprocmask decoding on alpha.
518 * Fixed ipc and socket subcall decoding on several architectures.
519 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
520 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
521 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
522 * Corrected io_* syscall entries on ARM.
523 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
524 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
525 * Fixed build when libaio-devel is not available.
526 * Fixed configure checks for PTRACE_* constants.
527 * Fixed compilation warnings remained on several architectures.
530 * Removed all non-Linux code. After years of neglect, that dead code
531 just hampered further strace development.
532 * Linux kernel >= 2.6.18 is recommended. Older versions might still
533 work but they haven't been thoroughly tested with this release.
535 Noteworthy changes in release 4.6 (2011-03-15)
536 ==============================================
538 * Changes in behavior
539 * Print diagnostic information about changes in personality mode to
540 standard error instead of standard output.
543 * Implemented a new method of following clone, fork, and vfork
544 syscalls using the Linux kernel's explicit facilities for tracing
545 creation of threads and child processes.
546 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
547 * Implemented decoding of TLS syscalls on m68k.
548 * Implemented biarch support on powerpc64.
549 * Implemented biarch support for getrlimit() and setrlimit().
550 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
551 * Implemented SOL_SCTP socket options decoding.
552 * Added HDIO_* ioctl names.
553 (Addresses Debian bug #450953).
554 * Added LOOP_* ioctl names.
555 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
556 to match Linux 2.6.37.
557 * Updated the list of IPPROTO_* constants to match netinet/in.h.
558 * Implemented decoding of HDIO_* and BLK* ioctls.
559 * Added MicroBlaze architecture support.
560 * Added new syscall entries to match Linux 2.6.37.
561 * Regenerated list of ioctl names from Linux 2.6.37.
562 * Enhanced signal notification decoding.
563 * Documented -C and -D options.
566 * Fixed fetching syscall arguments on m68k.
567 * Fixed an error when judging whether a process has children.
568 * Fixed get/set_robust_list syscall numbers for powerpc.
569 * Fixed a corner case in printing clone flags.
570 * Fixed cross-compiling issues.
571 * Fixed build issues on powerpc64, SH and SPARC.
572 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
573 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
574 fanotify_init, and fanotify_mark syscalls.
575 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
576 * Fixed biarch support in IO dumping.
577 * Fixed raw exit_group decoding.
578 * Fixed decoding of file descriptors on 64-bit architectures.
579 * Fixed a corner case in waitpid handling.
580 (Addresses Red Hat bug #663547).
581 * Fixed stat64 decoding on mips
582 (Addresses Debian bug #599028).
583 * Fixed misleading italics in the manual page.
584 (Addresses Debian bug #589323).
586 Noteworthy changes in release 4.5.20 (2010-04-13)
587 =================================================
590 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
591 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
592 rt_tgsigqueueinfo, perf_event_open.
593 * Enhanced decoding of recently added syscalls on non-x86 architectures
594 by replacing a bare decoder with elaborate parsers enabled earlier
596 * Implemented -C option to combine regular and -c output.
597 (Addresses Debian bug #466196)
598 * Enhanced decoding of mbind and mremap syscalls.
599 * Enhanced SOL_PACKET socket options decoding.
600 * Regenerated list of ioctl names from linux 2.6.33.
601 * Added TILE architecture support.
604 * Fixed build with Linux kernel headers 2.6.32-rc5+.
605 (Addresses Debian bug #560516 and Fedora bug #539044)
606 * Fixed build on mips.
607 * Fixed handling of Linux systems without struct statfs64.
608 * Fixed reporting signal mask by sigreturn on powerpc.
609 * Fixed potential stack buffer overflow in select decoder.
610 (Addresses Fedora bug #556678)
611 * Corrected msgsnd indirect ipccall decoding.
612 * Corrected decoding of 64bit syscalls.
613 (Addresses Debian bug #570603)
614 * Corrected getsockopt decoding on architectures where
615 sizeof(long) > sizeof(int).
616 (Addresses Debian bug #494844)
617 * Corrected decoding of epoll_pwait.
618 (Addresses Debian bug #513014)
619 * Corrected handling of killed threads.
621 Noteworthy changes in release 4.5.19 (2009-10-21)
622 =================================================
624 * Changes in behavior
625 * When command exits, strace now exits with the same exit status.
626 If command is terminated by a signal, strace terminates itself
627 with the same signal, so that strace can be used as a wrapper
628 process transparent to the invoking parent process.
629 When using -p option, the exit status of strace is zero unless
630 there was an unexpected error in doing the tracing.
631 (Addresses Fedora bug #105371 and Debian bug #37665)
634 * Implemented decoding of new Linux syscalls: accept4, dup3,
635 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
636 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
637 * Implemented decoding of accept4 socketcall.
638 * Enhanced prctl decoding.
639 * Enhanced nanosleep decoding.
640 * Enhanced ptrace decoding.
641 * Enhanced futex decoding.
642 * Enhanced CAP_* decoding.
643 * Enhanced SIOCS* ioctls decoding.
644 * Enhanced fcntl F_* flags decoding.
645 * Enhanced semop/semtimedop decoding.
646 * Updated ARM architecture support.
647 * Added Blackfin architecture support.
648 * Added AVR32 architecture support.
649 * Added CRIS architecture support.
650 * Made strace detect when traced process suddenly disappeared.
653 * Fixed syscall numbers for tee and sync_file_range.
654 (Addresses Debian bug #503124)
655 * Fixed several bugs in strings decoder, including potential heap
657 (Addresses Fedora bugs #470529, #478324 and #511035)
658 * Marked sendfile(2) as a network syscall.
659 (Addresses Debian bug #509499)
660 * Fixed accept(2) decoding.
661 (Addresses Debian bug #507573)
662 * Fixed sigtimedwait(2) decoding.
663 * Fixed build on ARM EABI.
664 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
665 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
666 (Addresses Red Hat bug #471169)
667 * Fixed display of 32-bit argv array on 64-bit architectures.
668 (Addresses Fedora bug #519480)
669 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
670 * Fixed HPPA architecture support.
671 (Addresses Debian bugs #437928 and #546619)
676 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
677 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
682 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
683 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
684 * Improved output for prctl system call on Linux.
685 * Improved support for Linux/ARM.
686 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
691 * Improved output for delete_module, futex, and mbind system calls on Linux.
692 * Improved output for SG_IO ioctls on Linux.
693 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
694 eventfd, getcpu, epoll_pwait.
699 * Several biarch improvements.
700 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
701 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
706 * Accept numeric system calls in -e.
711 * Introduce "-e trace=desc".
716 * Better x86-64 support for IA32 processes.
717 * Update PowerPC system calls.
718 * Better printing for Linux aio system calls.
722 * Quick fix release for build issues.
723 * One fix for Linux/ARM system call table.
728 * Print fault address for SIGSEGV/SIGBUS signals when available.
733 * Improve socket ioctl printing.
734 * Update Linux/IA64 syscall list.
735 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
736 * Improve mount flags printing.
737 * Support symbolic printing of x86_64 arch_prctl parameters.
742 * Update syscall tables for Alpha, ARM, HPPA.
743 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
744 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
745 * Improve ioctl command name matching.
746 * Print RTC_* ioctl structure contents.
747 * Support newer RLIMIT_* values.
748 * Print struct cmsghdr details in sendmsg.
753 * Print attribute values in *xattr system calls on Linux.
754 * Include pread and pwrite calls in -e read and -e write tracing.
755 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
756 * Print clock_t values symbolically in Linux clock_* system calls.
760 * Bug fixes, Linux ioctl updates.
761 * David Miller contributed support for Linux/SPARC64.
769 * Update Linux ioctl lists.
770 * Update PF_* and AF_* value lists.
771 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
776 * On Linux using NPTL threads, -p will now attach to all threads in a process.
777 * Handle new mq_* system calls in Linux 2.6.6 and later.
782 * Report some new VM_* bit values on Linux.
783 * Better output for Linux sched_* system calls.
788 * Display multiple ioctl name matches on Linux.
792 * New port to AMD's x86-64 architecture. One strace binary can
793 handle both new x86-64 and old i386 processes.
794 * Fixed support for LFS64 calls.
795 * New switch -E to add/remove environment variables for the command.
796 * Merged s390/s390x port.
797 * Trace an unbounded number of processes.
798 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
799 * Fixed bugs with attach/detach leaving things stopped.
800 * Fixed traced process seeing ECHILD despite live, traced children
801 in waitpid calls with WNOHANG.
802 * Stuart Menefy contributed a port to Linux/SH.
803 * Stephen Thomas contributed a port to Linux/SH64.
804 * Many other bug fixes.
808 * Fix Linux/ia64 support, looks like someone renamed a few things on us
809 * Fix the ioctl setup for Linux, turned out it did not really work.
810 Improve the ioctl extracter as well so we decode some more ones.
814 * compile fixes for Linux/mips
818 * Linux ia64 and hppa ports added
819 * The usual Linux syscall updates (includes 32bit uid/gid support),
820 * Linux ioctl list updated
821 * Support IPv6 scope ids
822 * FreeBSD/i386 port added
823 * UnixWare and Solaris updates
824 * Better support for tracing multithreaded processes in Linux
828 * Compiles on glibc2.0 systems again
829 * Linux/S390 port added
830 * The usual Linux syscall updates
831 * we can follow fork on arm now
835 * Linux/MIPS port added
836 * Lots of Linux updates again
837 * Improved IPv6 support
843 * Compiles on glibc2.0 systems again
847 * Get stat structure properly on Linux 64bit archs
848 * Personalities work again
849 * Compile correctly on SunOS again
855 * Linux (ultra)sparc fixes
862 * add support for more Linux architectures (powerpc, sparc, arm)
863 * support lots more Linux syscalls
864 * fix signal handling
865 * add IPX and IPIP support
866 * check stray syscall after execv
867 * fix hanging children
869 Changes in version 3.1
870 ======================
873 * Linux 68k is supported
874 * Linux alpha is supported
875 * configure is upgraded to autoconf 2.x
876 * using -f in combination with -e now works correctly
877 * output can be piped to a program
878 * tracing setuid programs works better
879 * it is now reasonable to install strace setuid to root in some circumstances
880 * new useful tracing names like file and process to trace whole
881 classes of system calls, e.g. -efile traces all system calls that
882 take a file name as an argument
883 * IPC calls on SunOS 4.1.x are decoded
884 * Linux program memory is reliably dereferenced
885 * Linux decodes at least the name of all syscalls as of pre2.0.4
886 * various cosmetic changes and bug fixes
888 Changes from versions 2.x to version 3.0
889 ========================================
891 * filename arguments are neither abbreviated nor stringified
892 * string arguments are now true C strings using octal instead of hex by default
893 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
894 * by default the output for multiple processes now goes into one file
895 * all structures, vectors, bitsets, etc. use consistent output formats
896 * the -c option now means count calls, -i does what the old -c used to do
898 New Features in version 3.0
899 ===========================
901 * non-ascii strings can be optionally printed entirely in hex
902 * the output format is readable when mutiple processes are generating output
903 * exit values are printed in an alignment column
904 * is is possible to suppress messages about attaching and detaching
905 * various tracing features can be enabled on a per syscall/signal/desc basis
906 * selective tracing of syscalls
907 * selective printing of syscall structures
908 * selective abbreviation of long structures on a per syscall basis
909 * selective printing of raw syscall arguments and results
910 * selective tracing of signals
911 * selective dumping of all I/O read from file descriptors
912 * selective dumping of all I/O written to file descriptors
913 * optional counting of time, calls, and errors for each syscall
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