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 * Enhanced decoding of sched_setattr syscall.
11 * Added -e trace=%sched option for tracing sched_* syscalls.
12 * Added -e trace=%clock option for tracing clock_* syscalls.
13 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
14 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
15 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
17 * Implemented decoding of statx syscall.
18 * Updated lists of ioctl commands from Linux 4.11.
21 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
23 Noteworthy changes in release 4.16 (2017-02-14)
24 ===============================================
27 * Implemented syscall return value injection (-e inject=SET:retval= option).
28 * Implemented signal injection (-e inject=SET:signal= option).
29 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
30 * Implemented decoding of all SG_* ioctl commands.
31 * Implemented decoding of ustat syscall.
32 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
33 and BPF_PROG_DETACH commands of bpf syscall.
34 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
35 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
37 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
38 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
39 * Updated lists of ioctl commands from Linux 4.10.
40 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
44 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
45 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
46 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
47 and pwritev* syscalls on x32.
48 * Fixed printing of string arguments of getxattr and setxattr syscalls
49 when -s option is used to limit the printed string size.
50 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
52 * Fixed decoding of SG_* and LOOP_* ioctl commands.
53 * Fixed build on mips with musl libc.
54 * Fixed cross-building of ioctlsort.
55 * Applied minor formatting fixes to the manual page.
57 Noteworthy changes in release 4.15 (2016-12-14)
58 ===============================================
61 * Time stamps are now printed according to ISO 8601.
62 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
63 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
64 syscalls is now formatted as an array.
67 * Implemented syscall fault injection (-e fault=... option).
68 * Implemented decoding of DM_* ioctl commands.
69 * Implemented decoding of attr parameter of perf_event_open syscall.
70 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
71 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
72 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
74 * Implemented PTRACE_GETREGS API support on m68k.
75 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
77 * Updated lists of ioctl commands from Linux 4.9.
78 * Added decoding of recently added syscalls on arc, x32, and xtensa.
79 * Enhanced manual page.
82 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
83 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
84 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
85 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
86 setgroups, setns, unshare, and utimes syscalls.
87 * Fixed handling of verbose flag in printing of controls array
88 of struct v4l2_ext_controls.
89 * Fixed omission of field names in the output of capability, sigaction,
90 sigevent, statfs, timespec, timeval, and utimbuf structures.
91 * Fixed printing of unknown syscalls in siginfo structure.
92 * Fixed decoding of ioctl constants on m68k.
93 * Fixed cris architecture support.
94 * Fixed cross build when host compiler does not support the same
95 set of warning flags as the cross compiler.
96 * Fixed build on SLE10 and SLE11.
98 Noteworthy changes in release 4.14 (2016-10-04)
99 ===============================================
101 * Changes in behavior
102 * When using -p option without a command and no processes has been attached,
103 strace exits with exit status 1.
106 * Added printing of the mode argument of open and openat syscalls
107 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
108 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
109 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
110 and aio family syscalls.
111 * Implemented fetching of the 7th subcall argument on mips o32.
112 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
114 * Updated lists of ioctl commands from Linux 4.8.
115 * Added decoding of new syscalls on sh and sh64.
116 * Added RISC-V architecture support.
119 * Marked io_setup and io_destroy as memory mapping related syscalls.
120 * Fixed leakage of placeholder descriptors to tracees.
121 * Fixed printing of mode_t, umode_t, and umask types.
122 * Fixed decoding of iovec arrays without a limit on total data size.
123 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
124 and ipc family syscalls.
125 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
126 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
128 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
129 * Fixed decoding of struct stat64 on sparc64.
130 * Fixed decoding of uid and gid-related syscalls on sparc64.
131 * Fixed decoding of the forth argument of semctl syscall on sparc64.
132 * Fixed values of tty ioctl constants on sparc64.
133 * Fixed sparc personality support on sparc64.
135 Noteworthy changes in release 4.13 (2016-07-26)
136 ===============================================
139 * Implemented a general netlink socket parser.
140 * Enhanced decoding of socket addresses.
141 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
142 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
143 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
144 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
145 and *_MAGIC constants.
146 * Updated lists of ioctl commands from Linux 4.7.
149 * Fixed decoding of pid_t argument of prlimit64 syscall.
150 * Fixed sign extension issues in the parser of struct rusage.
151 * Fixed race condition in decoding of timeout argument of recvmmsg and
152 rt_sigtimedwait syscalls.
153 * Fixed build with fresh linux kernel headers.
155 Noteworthy changes in release 4.12 (2016-05-31)
156 ===============================================
159 * Implemented simultaneous use of -p option and tracing of a command.
160 (addresses Debian bug #549942).
161 * Implemented caching of netlink conversations to reduce amount of time
162 spent in decoding socket details in -yy mode.
163 * Implemented -yy mode decoding of protocol:portid pairs associated with
164 netlink socket descriptors.
165 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
166 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
168 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
169 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
170 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
171 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
172 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
173 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
174 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
175 statfs64, tgkill, waitid, and xattr family syscalls.
176 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
177 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
178 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
179 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
180 * Added decoding of fadvise64 and fadvise64_64 on s390.
181 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
182 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
183 * Updated lists of ioctl commands from Linux 4.6.
186 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
187 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
188 * Fixed decoding of mlock2 syscall on sparc.
189 * Fixed decoding of osf_shmat syscall on alpha.
190 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
191 (addresses Debian bug #485979 and Fedora bug #1298294).
192 * Fixed decoding of preadv syscall in case of short read.
193 * Fixed decoding and dumping of readv syscall in case of short read.
194 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
195 * Fixed decoding of mincore syscall's last argument.
196 * Fixed remaining errors in mapping between syscall numbers and numbers
197 of syscall arguments.
198 * Applied various fixes to strace-graph script.
200 Noteworthy changes in release 4.11 (2015-12-21)
201 ===============================================
203 * Changes in behavior
204 * Some syscalls have different names depending on architecture and
205 personality. In these cases, syscall filtering and printing now
206 consistently uses the names that match corresponding __NR_* kernel
207 macros of the tracee's architecture and personality.
208 * Added strace prefix to all diagnostic messages.
211 * Enhanced and extended test suite.
212 * Implemented reliable tracing of processes whose personality differs
213 from the personality of strace, fixed decoding of 32-bit personality
214 syscalls on 64-bit architectures.
215 * When some data referenced by syscall arguments is irrelevant or cannot
216 be read from tracee's memory, strace now prints its address consistently.
217 * When a syscall is restarted using restart_syscall mechanism, strace now
218 shows the syscall name on architectures that expose this information.
219 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
220 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
221 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
222 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
223 * Optimized decoding of indirect socket syscalls.
224 * Implemented decoding of nanoseconds along with seconds in stat family
225 syscalls (addresses Fedora bug #1251176).
226 * Implemented decoding of struct statfs.f_flags in statfs syscall.
227 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
229 * Implemented decoding of indirect syscall on mips o32.
230 * Implemented decoding of IPPROTO_IP control messages.
231 * Implemented decoding of setsockopt syscall multicast arguments.
232 * Enhanced decoding of struct sigevent.
233 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
234 and v4l2 ioctl syscall arguments.
235 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
236 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
237 sendfile, setsockopt, and shmctl syscalls.
238 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
239 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
240 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
241 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
242 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
243 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
245 * Added Nios II architecture support.
246 * Added new syscall entries to match Linux 4.4.
249 * Fixed potential short read of strings from tracee's memory.
250 * Fixed -qq option in conjunction with -o option.
251 * Fixed filtering of <unavailable> syscalls.
252 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
253 with 64-bit aligned structures.
254 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
255 syscall flags arguments.
256 * Fixed decoding of 4th argument of clock_nanosleep syscall.
257 * Fixed decoding of getpagesize syscall on m68k.
258 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
259 * Fixed decoding of timezone argument of gettimeofday and settimeofday
261 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
263 * Fixed decoding of pipe syscall on alpha and mips.
264 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
265 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
266 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
268 * Fixed decoding of 4th argument of semctl indirect syscall.
269 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
270 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
271 * Fixed decoding of struct dirent on x32.
272 * Fixed decoding of times syscall return value on mips n32 and x32.
273 * Fixed decoding of path argument of umount2 syscall
274 (addresses Debian bug #785050).
275 * Worked around a kernel bug in tracing privileged executables.
276 * Fixed various errors in mapping between syscall numbers and associated
277 information like the number of syscall arguments, the name of syscall,
280 Noteworthy changes in release 4.10 (2015-03-06)
281 ===============================================
284 * Added -yy option to print protocol and address information associated with
286 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
287 recvmsg, sendmmsg, and recvmmsg syscalls.
288 * Implemented full 32-bit decoding of ioctl commands
289 (addresses Debian bug #692913 and Fedora bug #902788).
290 * Implemented PTRACE_GETREGS API support on ia64.
291 * Implemented PTRACE_GETREGS API support on mips.
292 * Implemented PTRACE_GETREGSET API support on s390/s390x.
293 * Implemented decoding of getrandom and seccomp syscalls.
294 * Implemented full decoding of 64-bit capability sets.
295 * Implemented decoding of all prctl commands.
296 * Implemented decoding of parametrized ioctl commands.
297 * Implemented decoding of evdev ioctl commands.
298 * Implemented decoding of v4l ioctl commands.
299 * Implemented decoding of SG_IO v4 ioctl commands.
300 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
301 * Implemented decoding of FALLOC_FL_* fallocate flags.
302 * Implemented decoding of rt_sigreturn signal mask on aarch64,
304 * Enhanced socket decoder to support bluetooth sockets.
305 * Enhanced decoding of unlisted ioctl commands.
306 * Enhanced decoding of getsockopt and setsockopt syscall.
307 * Enhanced decoding of sysinfo syscall.
308 * Enhanced decoding of struct cmsghdr.
309 * Enhanced decoding of wait status.
310 * Enhanced aio support on non-x86 architectures by using external libaio.h.
311 * Added O_TMPFILE to the list of recognized open mode flags.
312 * Updated the list of filesystem type constants that is used in decoding
313 statfs family syscalls.
314 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
316 * Updated lists of signal constants from Linux 3.19.
317 * Updated lists of errno constants from Linux 3.19.
318 * Updated lists of ioctl commands from Linux 3.9.
319 * Added new syscall entries to match Linux 3.19.
322 * Fixed various errors in mapping between syscall numbers and associated
323 information like the number of syscall arguments, the name of syscall,
325 * Fixed quoting issues in printing descriptors, filenames, network interface
326 names, struct utsname members, device/volume names of BLK* ioctl commands.
327 * Fixed uid_t/git_t decoding.
328 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
329 * Fixed potential open flags truncation on some architectures.
330 * Fixed decoding of struct ifreq.ifr_name.
331 * Fixed decoding of SIOCSIFNAME ioctl command.
332 * Fixed decoding of RENAME_* renameat2 flags.
333 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
334 * Fixed decoding of indirect ipc subcalls on some architectures.
335 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
336 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
337 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
338 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
339 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
340 sparc, sparc64, mips, and s390.
341 * Fixed instruction pointer output (-i option) on architectures that support
342 several personalities.
343 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
345 * Fixed build on systems where struct sigaction has no sa_restorer member.
346 * Fixed build with uclibc and musl libc.
349 * Linux kernel >= 2.5.46 is required.
350 Older versions without a decent PTRACE_SETOPTIONS support will not work.
351 * On mips, linux kernel >= 2.6.15 is required.
352 Older versions without a decent PTRACE_GETREGS support will not work.
353 * On s390 and s390x, linux kernel >= 2.6.27 is required.
354 Older versions without a decent PTRACE_GETREGSET support will not work.
356 Noteworthy changes in release 4.9 (2014-08-15)
357 ==============================================
359 * Changes in behavior
360 * Disabled OABI support on ARM EABI systems by default,
361 added --enable-arm-oabi option to enable it at configure time.
364 * Added experimental -k option to print stack trace after each traced syscall.
365 * Added -w option to produce stats on syscall latency.
366 (addresses Debian bug #457497).
367 * Added ARC architecture support.
368 * Added PTRACE_GETREGS API support on PowerPC.
369 * Enhanced Bionic libc and musl libc support.
370 * Enhanced tracing of x86 personality processes on x86_64 and x32.
371 * Enhanced tracing of ARM personality processes on AArch64.
372 * Enhanced 32/64bit personality detection on PowerPC.
373 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
374 renameat2, and request_key syscalls.
375 * Robustified decoding of select, pselect, and io_submit syscalls.
376 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
377 setdomainname, sethostname, setns, and sync_file_range syscalls.
378 * Enhanced decoding of signal bitmasks.
379 * Enhanced decoding of file descriptors.
380 * Enhanced siginfo_t decoding.
381 * Enhanced PF_NETLINK decoding.
382 * Updated CLOCK_* constants
383 (addresses Fedora bug #1088455).
384 * Added new syscall entries to match Linux 3.16.
387 * Added shmat and shmdt to the set of memory mapping related syscalls.
388 * Fixed detaching from stopped processes.
389 * Fixed fanotify_mark decoding on 32bit architectures.
390 * Fixed offset decoding in preadv and pwritev syscalls.
391 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
392 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
393 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
394 (addresses Fedora bug #993384).
395 * Miscellaneous corrections in the manual page.
396 (Addresses Debian bug #725987).
398 Noteworthy changes in release 4.8 (2013-06-03)
399 ==============================================
401 * Changes in behavior
402 * In case of normal strace termination, when the trace output is
403 redirected to a pipe, strace now closes it and waits for the pipe
404 process termination before exit.
407 * Implemented tracing using PTRACE_SEIZE API (when available).
408 * Implemented more reliable PTRACE_GETREGSET-based process personality
409 detection on x86-64 and x32 (when available).
410 * Added -e trace=memory option for tracing memory mapping related syscalls.
411 * Documented -b option.
412 * Allowed exit status messages to be suppressed by giving -q option twice.
413 * Added AArch64 architecture support
414 (addresses Debian bug #693074 and Fedora bug #969858).
415 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
416 * Added tilegx personality support for Tile.
417 * Enhanced support of NOMMU architectures.
418 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
420 * Added new syscall entries to match Linux 3.9.
421 * Regenerated the list of common ioctl names from Linux 3.9.
422 * Updated the list of errno constants.
423 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
424 PTRACE_O_*, and TCP_* constants.
425 * Implemented decoding of UBI ioctls.
426 * Removed redundant "*32" ioctl names.
429 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
430 (addresses Fedora bug #659382).
431 * Fixed kernel release string parsing
432 (addresses Debian bug #702309).
433 * Fixed decoding of *xattr syscalls
434 (addresses Fedora bug #885233).
435 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
436 (addresses Fedora bug #912790).
437 * Fixed tracing forks on SPARC.
438 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
439 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
440 and truncate64 syscalls.
441 * Fixed categories of multiple syscalls on most of supported architectures.
442 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
443 * Fixed decoding of multiple 32-bit personality syscalls on x32.
444 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
445 S390x, and Tile architectures.
446 * Fixed semtimedop decoding on S390x.
447 * Fixed sram_alloc decoding on Blackfin.
448 * Fixed build when process_vm_readv is a stab.
449 * Fixed build with older versions of libaio.h.
451 Noteworthy changes in release 4.7 (2012-05-02)
452 ==============================================
454 * Changes in behavior
455 * strace no longer suspends waitpid until there is a child
456 for waitpid'ing process to collect status from.
457 * strace no longer detaches from a tracee which is supposed
459 * strace now issues a new message: "+++ exited with EXITCODE +++"
460 which shows exact moment strace got exit notification,
461 analogous to existing "+++ killed by SIG +++" message.
464 * Added x32 personality support (x86_64 architecture).
465 * Added -y and -P options to print file descriptor paths and
466 filter by those paths.
467 * Added -I option to control strace interactivity.
468 * Allowed -p option to take comma or whitespace-separated list of PIDs.
469 * Added strace_log_merge script helper to merge timestamped "strace -ff"
471 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
472 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
473 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
474 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
475 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
476 listxattr, setrlimit and swapon syscalls.
477 * Implemented decoding of loop and mtd ioctls.
478 * Added syscall entries for new linux syscalls.
479 * Added syscall entries for direct socket system calls on powerpc.
480 * Updated the list of errno constants.
481 * Updated lists of MSG_*, STA_*, and TCP_* constants.
482 * Regenerated the list of ioctl names from Linux 3.3.
483 * Enhanced switching between processes with different personalities.
484 * Enhanced signals reporting by using short signal names.
485 * Made ERESTART* messages more descriptive.
486 * Made parsing of numbers from strings more robust.
487 * Added support for compat_statfs64 and statfs64.f_flags.
488 * Changed read of data blocks to use single process_vm_readv syscall
489 (when available) instead of several PTRACE_PEEKDATA operations.
490 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
491 operation instead of several PTRACE_PEEKUSER operations.
492 * Applied various optimizations to make strace work faster.
495 * Implemented proper handling of real SIGTRAPs on kernels supporting
496 PTRACE_O_TRACESYSGOOD.
497 (Addresses Fedora bug #162774).
498 * Fixed sockaddr_un.sun_path name in decoded output.
499 (Addresses Debian bug #554946).
500 * Fixed to avoid potential core file clobbering on exit.
501 (Addresses Debian bug #656398).
502 * Fixed a typo in documentation.
503 (Addresses Debian bug #653309).
504 * Fixed decoding of timer id returned by timer_create.
505 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
506 * Fixed *at syscalls flags decoding.
507 * Fixed ARM EABI 64-bit syscall's arguments decoding.
508 * Fixed semtimedop decoding on s390.
509 * Fixed osf_sigprocmask decoding on alpha.
510 * Fixed ipc and socket subcall decoding on several architectures.
511 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
512 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
513 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
514 * Corrected io_* syscall entries on ARM.
515 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
516 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
517 * Fixed build when libaio-devel is not available.
518 * Fixed configure checks for PTRACE_* constants.
519 * Fixed compilation warnings remained on several architectures.
522 * Removed all non-Linux code. After years of neglect, that dead code
523 just hampered further strace development.
524 * Linux kernel >= 2.6.18 is recommended. Older versions might still
525 work but they haven't been thoroughly tested with this release.
527 Noteworthy changes in release 4.6 (2011-03-15)
528 ==============================================
530 * Changes in behavior
531 * Print diagnostic information about changes in personality mode to
532 standard error instead of standard output.
535 * Implemented a new method of following clone, fork, and vfork
536 syscalls using the Linux kernel's explicit facilities for tracing
537 creation of threads and child processes.
538 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
539 * Implemented decoding of TLS syscalls on m68k.
540 * Implemented biarch support on powerpc64.
541 * Implemented biarch support for getrlimit() and setrlimit().
542 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
543 * Implemented SOL_SCTP socket options decoding.
544 * Added HDIO_* ioctl names.
545 (Addresses Debian bug #450953).
546 * Added LOOP_* ioctl names.
547 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
548 to match Linux 2.6.37.
549 * Updated the list of IPPROTO_* constants to match netinet/in.h.
550 * Implemented decoding of HDIO_* and BLK* ioctls.
551 * Added MicroBlaze architecture support.
552 * Added new syscall entries to match Linux 2.6.37.
553 * Regenerated list of ioctl names from Linux 2.6.37.
554 * Enhanced signal notification decoding.
555 * Documented -C and -D options.
558 * Fixed fetching syscall arguments on m68k.
559 * Fixed an error when judging whether a process has children.
560 * Fixed get/set_robust_list syscall numbers for powerpc.
561 * Fixed a corner case in printing clone flags.
562 * Fixed cross-compiling issues.
563 * Fixed build issues on powerpc64, SH and SPARC.
564 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
565 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
566 fanotify_init, and fanotify_mark syscalls.
567 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
568 * Fixed biarch support in IO dumping.
569 * Fixed raw exit_group decoding.
570 * Fixed decoding of file descriptors on 64-bit architectures.
571 * Fixed a corner case in waitpid handling.
572 (Addresses Red Hat bug #663547).
573 * Fixed stat64 decoding on mips
574 (Addresses Debian bug #599028).
575 * Fixed misleading italics in the manual page.
576 (Addresses Debian bug #589323).
578 Noteworthy changes in release 4.5.20 (2010-04-13)
579 =================================================
582 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
583 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
584 rt_tgsigqueueinfo, perf_event_open.
585 * Enhanced decoding of recently added syscalls on non-x86 architectures
586 by replacing a bare decoder with elaborate parsers enabled earlier
588 * Implemented -C option to combine regular and -c output.
589 (Addresses Debian bug #466196)
590 * Enhanced decoding of mbind and mremap syscalls.
591 * Enhanced SOL_PACKET socket options decoding.
592 * Regenerated list of ioctl names from linux 2.6.33.
593 * Added TILE architecture support.
596 * Fixed build with Linux kernel headers 2.6.32-rc5+.
597 (Addresses Debian bug #560516 and Fedora bug #539044)
598 * Fixed build on mips.
599 * Fixed handling of Linux systems without struct statfs64.
600 * Fixed reporting signal mask by sigreturn on powerpc.
601 * Fixed potential stack buffer overflow in select decoder.
602 (Addresses Fedora bug #556678)
603 * Corrected msgsnd indirect ipccall decoding.
604 * Corrected decoding of 64bit syscalls.
605 (Addresses Debian bug #570603)
606 * Corrected getsockopt decoding on architectures where
607 sizeof(long) > sizeof(int).
608 (Addresses Debian bug #494844)
609 * Corrected decoding of epoll_pwait.
610 (Addresses Debian bug #513014)
611 * Corrected handling of killed threads.
613 Noteworthy changes in release 4.5.19 (2009-10-21)
614 =================================================
616 * Changes in behavior
617 * When command exits, strace now exits with the same exit status.
618 If command is terminated by a signal, strace terminates itself
619 with the same signal, so that strace can be used as a wrapper
620 process transparent to the invoking parent process.
621 When using -p option, the exit status of strace is zero unless
622 there was an unexpected error in doing the tracing.
623 (Addresses Fedora bug #105371 and Debian bug #37665)
626 * Implemented decoding of new Linux syscalls: accept4, dup3,
627 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
628 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
629 * Implemented decoding of accept4 socketcall.
630 * Enhanced prctl decoding.
631 * Enhanced nanosleep decoding.
632 * Enhanced ptrace decoding.
633 * Enhanced futex decoding.
634 * Enhanced CAP_* decoding.
635 * Enhanced SIOCS* ioctls decoding.
636 * Enhanced fcntl F_* flags decoding.
637 * Enhanced semop/semtimedop decoding.
638 * Updated ARM architecture support.
639 * Added Blackfin architecture support.
640 * Added AVR32 architecture support.
641 * Added CRIS architecture support.
642 * Made strace detect when traced process suddenly disappeared.
645 * Fixed syscall numbers for tee and sync_file_range.
646 (Addresses Debian bug #503124)
647 * Fixed several bugs in strings decoder, including potential heap
649 (Addresses Fedora bugs #470529, #478324 and #511035)
650 * Marked sendfile(2) as a network syscall.
651 (Addresses Debian bug #509499)
652 * Fixed accept(2) decoding.
653 (Addresses Debian bug #507573)
654 * Fixed sigtimedwait(2) decoding.
655 * Fixed build on ARM EABI.
656 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
657 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
658 (Addresses Red Hat bug #471169)
659 * Fixed display of 32-bit argv array on 64-bit architectures.
660 (Addresses Fedora bug #519480)
661 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
662 * Fixed HPPA architecture support.
663 (Addresses Debian bugs #437928 and #546619)
668 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
669 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
674 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
675 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
676 * Improved output for prctl system call on Linux.
677 * Improved support for Linux/ARM.
678 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
683 * Improved output for delete_module, futex, and mbind system calls on Linux.
684 * Improved output for SG_IO ioctls on Linux.
685 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
686 eventfd, getcpu, epoll_pwait.
691 * Several biarch improvements.
692 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
693 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
698 * Accept numeric system calls in -e.
703 * Introduce "-e trace=desc".
708 * Better x86-64 support for IA32 processes.
709 * Update PowerPC system calls.
710 * Better printing for Linux aio system calls.
714 * Quick fix release for build issues.
715 * One fix for Linux/ARM system call table.
720 * Print fault address for SIGSEGV/SIGBUS signals when available.
725 * Improve socket ioctl printing.
726 * Update Linux/IA64 syscall list.
727 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
728 * Improve mount flags printing.
729 * Support symbolic printing of x86_64 arch_prctl parameters.
734 * Update syscall tables for Alpha, ARM, HPPA.
735 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
736 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
737 * Improve ioctl command name matching.
738 * Print RTC_* ioctl structure contents.
739 * Support newer RLIMIT_* values.
740 * Print struct cmsghdr details in sendmsg.
745 * Print attribute values in *xattr system calls on Linux.
746 * Include pread and pwrite calls in -e read and -e write tracing.
747 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
748 * Print clock_t values symbolically in Linux clock_* system calls.
752 * Bug fixes, Linux ioctl updates.
753 * David Miller contributed support for Linux/SPARC64.
761 * Update Linux ioctl lists.
762 * Update PF_* and AF_* value lists.
763 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
768 * On Linux using NPTL threads, -p will now attach to all threads in a process.
769 * Handle new mq_* system calls in Linux 2.6.6 and later.
774 * Report some new VM_* bit values on Linux.
775 * Better output for Linux sched_* system calls.
780 * Display multiple ioctl name matches on Linux.
784 * New port to AMD's x86-64 architecture. One strace binary can
785 handle both new x86-64 and old i386 processes.
786 * Fixed support for LFS64 calls.
787 * New switch -E to add/remove environment variables for the command.
788 * Merged s390/s390x port.
789 * Trace an unbounded number of processes.
790 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
791 * Fixed bugs with attach/detach leaving things stopped.
792 * Fixed traced process seeing ECHILD despite live, traced children
793 in waitpid calls with WNOHANG.
794 * Stuart Menefy contributed a port to Linux/SH.
795 * Stephen Thomas contributed a port to Linux/SH64.
796 * Many other bug fixes.
800 * Fix Linux/ia64 support, looks like someone renamed a few things on us
801 * Fix the ioctl setup for Linux, turned out it did not really work.
802 Improve the ioctl extracter as well so we decode some more ones.
806 * compile fixes for Linux/mips
810 * Linux ia64 and hppa ports added
811 * The usual Linux syscall updates (includes 32bit uid/gid support),
812 * Linux ioctl list updated
813 * Support IPv6 scope ids
814 * FreeBSD/i386 port added
815 * UnixWare and Solaris updates
816 * Better support for tracing multithreaded processes in Linux
820 * Compiles on glibc2.0 systems again
821 * Linux/S390 port added
822 * The usual Linux syscall updates
823 * we can follow fork on arm now
827 * Linux/MIPS port added
828 * Lots of Linux updates again
829 * Improved IPv6 support
835 * Compiles on glibc2.0 systems again
839 * Get stat structure properly on Linux 64bit archs
840 * Personalities work again
841 * Compile correctly on SunOS again
847 * Linux (ultra)sparc fixes
854 * add support for more Linux architectures (powerpc, sparc, arm)
855 * support lots more Linux syscalls
856 * fix signal handling
857 * add IPX and IPIP support
858 * check stray syscall after execv
859 * fix hanging children
861 Changes in version 3.1
862 ======================
865 * Linux 68k is supported
866 * Linux alpha is supported
867 * configure is upgraded to autoconf 2.x
868 * using -f in combination with -e now works correctly
869 * output can be piped to a program
870 * tracing setuid programs works better
871 * it is now reasonable to install strace setuid to root in some circumstances
872 * new useful tracing names like file and process to trace whole
873 classes of system calls, e.g. -efile traces all system calls that
874 take a file name as an argument
875 * IPC calls on SunOS 4.1.x are decoded
876 * Linux program memory is reliably dereferenced
877 * Linux decodes at least the name of all syscalls as of pre2.0.4
878 * various cosmetic changes and bug fixes
880 Changes from versions 2.x to version 3.0
881 ========================================
883 * filename arguments are neither abbreviated nor stringified
884 * string arguments are now true C strings using octal instead of hex by default
885 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
886 * by default the output for multiple processes now goes into one file
887 * all structures, vectors, bitsets, etc. use consistent output formats
888 * the -c option now means count calls, -i does what the old -c used to do
890 New Features in version 3.0
891 ===========================
893 * non-ascii strings can be optionally printed entirely in hex
894 * the output format is readable when mutiple processes are generating output
895 * exit values are printed in an alignment column
896 * is is possible to suppress messages about attaching and detaching
897 * various tracing features can be enabled on a per syscall/signal/desc basis
898 * selective tracing of syscalls
899 * selective printing of syscall structures
900 * selective abbreviation of long structures on a per syscall basis
901 * selective printing of raw syscall arguments and results
902 * selective tracing of signals
903 * selective dumping of all I/O read from file descriptors
904 * selective dumping of all I/O written to file descriptors
905 * optional counting of time, calls, and errors for each syscall
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