1 Noteworthy changes in release 4.15 (2016-12-13)
4 * Time stamps are now printed according to ISO 8601.
5 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
6 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
7 syscalls is now formatted as an array.
10 * Implemented syscall fault injection (-e fault=... option).
11 * Implemented decoding of DM_* ioctl commands.
12 * Implemented decoding of attr parameter of perf_event_open syscall.
13 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
14 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
15 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
17 * Implemented PTRACE_GETREGS API support on m68k.
18 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
20 * Updated lists of ioctl commands from Linux 4.9.
21 * Added decoding of recently added syscalls on arc, x32, and xtensa.
22 * Enhanced manual page.
25 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
26 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
27 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
28 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
29 setgroups, setns, unshare, and utimes syscalls.
30 * Fixed handling of verbose flag in printing of controls array
31 of struct v4l2_ext_controls.
32 * Fixed omission of field names in the output of capability, sigaction,
33 sigevent, statfs, timespec, timeval, and utimbuf structures.
34 * Fixed printing of unknown syscalls in siginfo structure.
35 * Fixed decoding of ioctl constants on m68k.
36 * Fixed cris architecture support.
37 * Fixed cross build when host compiler does not support the same
38 set of warning flags as the cross compiler.
39 * Fixed build on SLE10 and SLE11.
41 Noteworthy changes in release 4.14 (2016-10-04)
42 ===============================================
45 * When using -p option without a command and no processes has been attached,
46 strace exits with exit status 1.
49 * Added printing of the mode argument of open and openat syscalls
50 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
51 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
52 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
53 and aio family syscalls.
54 * Implemented fetching of the 7th subcall argument on mips o32.
55 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
57 * Updated lists of ioctl commands from Linux 4.8.
58 * Added decoding of new syscalls on sh and sh64.
59 * Added RISC-V architecture support.
62 * Marked io_setup and io_destroy as memory mapping related syscalls.
63 * Fixed leakage of placeholder descriptors to tracees.
64 * Fixed printing of mode_t, umode_t, and umask types.
65 * Fixed decoding of iovec arrays without a limit on total data size.
66 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
67 and ipc family syscalls.
68 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
69 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
71 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
72 * Fixed decoding of struct stat64 on sparc64.
73 * Fixed decoding of uid and gid-related syscalls on sparc64.
74 * Fixed decoding of the forth argument of semctl syscall on sparc64.
75 * Fixed values of tty ioctl constants on sparc64.
76 * Fixed sparc personality support on sparc64.
78 Noteworthy changes in release 4.13 (2016-07-26)
79 ===============================================
82 * Implemented a general netlink socket parser.
83 * Enhanced decoding of socket addresses.
84 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
85 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
86 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
87 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
88 and *_MAGIC constants.
89 * Updated lists of ioctl commands from Linux 4.7.
92 * Fixed decoding of pid_t argument of prlimit64 syscall.
93 * Fixed sign extension issues in the parser of struct rusage.
94 * Fixed race condition in decoding of timeout argument of recvmmsg and
95 rt_sigtimedwait syscalls.
96 * Fixed build with fresh linux kernel headers.
98 Noteworthy changes in release 4.12 (2016-05-31)
99 ===============================================
102 * Implemented simultaneous use of -p option and tracing of a command.
103 (addresses Debian bug #549942).
104 * Implemented caching of netlink conversations to reduce amount of time
105 spent in decoding socket details in -yy mode.
106 * Implemented -yy mode decoding of protocol:portid pairs associated with
107 netlink socket descriptors.
108 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
109 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
111 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
112 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
113 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
114 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
115 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
116 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
117 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
118 statfs64, tgkill, waitid, and xattr family syscalls.
119 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
120 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
121 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
122 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
123 * Added decoding of fadvise64 and fadvise64_64 on s390.
124 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
125 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
126 * Updated lists of ioctl commands from Linux 4.6.
129 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
130 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
131 * Fixed decoding of mlock2 syscall on sparc.
132 * Fixed decoding of osf_shmat syscall on alpha.
133 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
134 (addresses Debian bug #485979 and Fedora bug #1298294).
135 * Fixed decoding of preadv syscall in case of short read.
136 * Fixed decoding and dumping of readv syscall in case of short read.
137 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
138 * Fixed decoding of mincore syscall's last argument.
139 * Fixed remaining errors in mapping between syscall numbers and numbers
140 of syscall arguments.
141 * Applied various fixes to strace-graph script.
143 Noteworthy changes in release 4.11 (2015-12-21)
144 ===============================================
146 * Changes in behavior
147 * Some syscalls have different names depending on architecture and
148 personality. In these cases, syscall filtering and printing now
149 consistently uses the names that match corresponding __NR_* kernel
150 macros of the tracee's architecture and personality.
151 * Added strace prefix to all diagnostic messages.
154 * Enhanced and extended test suite.
155 * Implemented reliable tracing of processes whose personality differs
156 from the personality of strace, fixed decoding of 32-bit personality
157 syscalls on 64-bit architectures.
158 * When some data referenced by syscall arguments is irrelevant or cannot
159 be read from tracee's memory, strace now prints its address consistently.
160 * When a syscall is restarted using restart_syscall mechanism, strace now
161 shows the syscall name on architectures that expose this information.
162 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
163 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
164 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
165 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
166 * Optimized decoding of indirect socket syscalls.
167 * Implemented decoding of nanoseconds along with seconds in stat family
168 syscalls (addresses Fedora bug #1251176).
169 * Implemented decoding of struct statfs.f_flags in statfs syscall.
170 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
172 * Implemented decoding of indirect syscall on mips o32.
173 * Implemented decoding of IPPROTO_IP control messages.
174 * Implemented decoding of setsockopt syscall multicast arguments.
175 * Enhanced decoding of struct sigevent.
176 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
177 and v4l2 ioctl syscall arguments.
178 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
179 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
180 sendfile, setsockopt, and shmctl syscalls.
181 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
182 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
183 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
184 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
185 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
186 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
188 * Added Nios II architecture support.
189 * Added new syscall entries to match Linux 4.4.
192 * Fixed potential short read of strings from tracee's memory.
193 * Fixed -qq option in conjunction with -o option.
194 * Fixed filtering of <unavailable> syscalls.
195 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
196 with 64-bit aligned structures.
197 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
198 syscall flags arguments.
199 * Fixed decoding of 4th argument of clock_nanosleep syscall.
200 * Fixed decoding of getpagesize syscall on m68k.
201 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
202 * Fixed decoding of timezone argument of gettimeofday and settimeofday
204 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
206 * Fixed decoding of pipe syscall on alpha and mips.
207 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
208 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
209 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
211 * Fixed decoding of 4th argument of semctl indirect syscall.
212 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
213 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
214 * Fixed decoding of struct dirent on x32.
215 * Fixed decoding of times syscall return value on mips n32 and x32.
216 * Fixed decoding of path argument of umount2 syscall
217 (addresses Debian bug #785050).
218 * Worked around a kernel bug in tracing privileged executables.
219 * Fixed various errors in mapping between syscall numbers and associated
220 information like the number of syscall arguments, the name of syscall,
223 Noteworthy changes in release 4.10 (2015-03-06)
224 ===============================================
227 * Added -yy option to print protocol and address information associated with
229 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
230 recvmsg, sendmmsg, and recvmmsg syscalls.
231 * Implemented full 32-bit decoding of ioctl commands
232 (addresses Debian bug #692913 and Fedora bug #902788).
233 * Implemented PTRACE_GETREGS API support on ia64.
234 * Implemented PTRACE_GETREGS API support on mips.
235 * Implemented PTRACE_GETREGSET API support on s390/s390x.
236 * Implemented decoding of getrandom and seccomp syscalls.
237 * Implemented full decoding of 64-bit capability sets.
238 * Implemented decoding of all prctl commands.
239 * Implemented decoding of parametrized ioctl commands.
240 * Implemented decoding of evdev ioctl commands.
241 * Implemented decoding of v4l ioctl commands.
242 * Implemented decoding of SG_IO v4 ioctl commands.
243 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
244 * Implemented decoding of FALLOC_FL_* fallocate flags.
245 * Implemented decoding of rt_sigreturn signal mask on aarch64,
247 * Enhanced socket decoder to support bluetooth sockets.
248 * Enhanced decoding of unlisted ioctl commands.
249 * Enhanced decoding of getsockopt and setsockopt syscall.
250 * Enhanced decoding of sysinfo syscall.
251 * Enhanced decoding of struct cmsghdr.
252 * Enhanced decoding of wait status.
253 * Enhanced aio support on non-x86 architectures by using external libaio.h.
254 * Added O_TMPFILE to the list of recognized open mode flags.
255 * Updated the list of filesystem type constants that is used in decoding
256 statfs family syscalls.
257 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
259 * Updated lists of signal constants from Linux 3.19.
260 * Updated lists of errno constants from Linux 3.19.
261 * Updated lists of ioctl commands from Linux 3.9.
262 * Added new syscall entries to match Linux 3.19.
265 * Fixed various errors in mapping between syscall numbers and associated
266 information like the number of syscall arguments, the name of syscall,
268 * Fixed quoting issues in printing descriptors, filenames, network interface
269 names, struct utsname members, device/volume names of BLK* ioctl commands.
270 * Fixed uid_t/git_t decoding.
271 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
272 * Fixed potential open flags truncation on some architectures.
273 * Fixed decoding of struct ifreq.ifr_name.
274 * Fixed decoding of SIOCSIFNAME ioctl command.
275 * Fixed decoding of RENAME_* renameat2 flags.
276 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
277 * Fixed decoding of indirect ipc subcalls on some architectures.
278 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
279 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
280 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
281 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
282 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
283 sparc, sparc64, mips, and s390.
284 * Fixed instruction pointer output (-i option) on architectures that support
285 several personalities.
286 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
288 * Fixed build on systems where struct sigaction has no sa_restorer member.
289 * Fixed build with uclibc and musl libc.
292 * Linux kernel >= 2.5.46 is required.
293 Older versions without a decent PTRACE_SETOPTIONS support will not work.
294 * On mips, linux kernel >= 2.6.15 is required.
295 Older versions without a decent PTRACE_GETREGS support will not work.
296 * On s390 and s390x, linux kernel >= 2.6.27 is required.
297 Older versions without a decent PTRACE_GETREGSET support will not work.
299 Noteworthy changes in release 4.9 (2014-08-15)
300 ==============================================
302 * Changes in behavior
303 * Disabled OABI support on ARM EABI systems by default,
304 added --enable-arm-oabi option to enable it at configure time.
307 * Added experimental -k option to print stack trace after each traced syscall.
308 * Added -w option to produce stats on syscall latency.
309 (addresses Debian bug #457497).
310 * Added ARC architecture support.
311 * Added PTRACE_GETREGS API support on PowerPC.
312 * Enhanced Bionic libc and musl libc support.
313 * Enhanced tracing of x86 personality processes on x86_64 and x32.
314 * Enhanced tracing of ARM personality processes on AArch64.
315 * Enhanced 32/64bit personality detection on PowerPC.
316 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
317 renameat2, and request_key syscalls.
318 * Robustified decoding of select, pselect, and io_submit syscalls.
319 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
320 setdomainname, sethostname, setns, and sync_file_range syscalls.
321 * Enhanced decoding of signal bitmasks.
322 * Enhanced decoding of file descriptors.
323 * Enhanced siginfo_t decoding.
324 * Enhanced PF_NETLINK decoding.
325 * Updated CLOCK_* constants
326 (addresses Fedora bug #1088455).
327 * Added new syscall entries to match Linux 3.16.
330 * Added shmat and shmdt to the set of memory mapping related syscalls.
331 * Fixed detaching from stopped processes.
332 * Fixed fanotify_mark decoding on 32bit architectures.
333 * Fixed offset decoding in preadv and pwritev syscalls.
334 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
335 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
336 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
337 (addresses Fedora bug #993384).
338 * Miscellaneous corrections in the manual page.
339 (Addresses Debian bug #725987).
341 Noteworthy changes in release 4.8 (2013-06-03)
342 ==============================================
344 * Changes in behavior
345 * In case of normal strace termination, when the trace output is
346 redirected to a pipe, strace now closes it and waits for the pipe
347 process termination before exit.
350 * Implemented tracing using PTRACE_SEIZE API (when available).
351 * Implemented more reliable PTRACE_GETREGSET-based process personality
352 detection on x86-64 and x32 (when available).
353 * Added -e trace=memory option for tracing memory mapping related syscalls.
354 * Documented -b option.
355 * Allowed exit status messages to be suppressed by giving -q option twice.
356 * Added AArch64 architecture support
357 (addresses Debian bug #693074 and Fedora bug #969858).
358 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
359 * Added tilegx personality support for Tile.
360 * Enhanced support of NOMMU architectures.
361 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
363 * Added new syscall entries to match Linux 3.9.
364 * Regenerated the list of common ioctl names from Linux 3.9.
365 * Updated the list of errno constants.
366 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
367 PTRACE_O_*, and TCP_* constants.
368 * Implemented decoding of UBI ioctls.
369 * Removed redundant "*32" ioctl names.
372 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
373 (addresses Fedora bug #659382).
374 * Fixed kernel release string parsing
375 (addresses Debian bug #702309).
376 * Fixed decoding of *xattr syscalls
377 (addresses Fedora bug #885233).
378 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
379 (addresses Fedora bug #912790).
380 * Fixed tracing forks on SPARC.
381 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
382 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
383 and truncate64 syscalls.
384 * Fixed categories of multiple syscalls on most of supported architectures.
385 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
386 * Fixed decoding of multiple 32-bit personality syscalls on x32.
387 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
388 S390x, and Tile architectures.
389 * Fixed semtimedop decoding on S390x.
390 * Fixed sram_alloc decoding on Blackfin.
391 * Fixed build when process_vm_readv is a stab.
392 * Fixed build with older versions of libaio.h.
394 Noteworthy changes in release 4.7 (2012-05-02)
395 ==============================================
397 * Changes in behavior
398 * strace no longer suspends waitpid until there is a child
399 for waitpid'ing process to collect status from.
400 * strace no longer detaches from a tracee which is supposed
402 * strace now issues a new message: "+++ exited with EXITCODE +++"
403 which shows exact moment strace got exit notification,
404 analogous to existing "+++ killed by SIG +++" message.
407 * Added x32 personality support (x86_64 architecture).
408 * Added -y and -P options to print file descriptor paths and
409 filter by those paths.
410 * Added -I option to control strace interactivity.
411 * Allowed -p option to take comma or whitespace-separated list of PIDs.
412 * Added strace_log_merge script helper to merge timestamped "strace -ff"
414 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
415 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
416 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
417 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
418 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
419 listxattr, setrlimit and swapon syscalls.
420 * Implemented decoding of loop and mtd ioctls.
421 * Added syscall entries for new linux syscalls.
422 * Added syscall entries for direct socket system calls on powerpc.
423 * Updated the list of errno constants.
424 * Updated lists of MSG_*, STA_*, and TCP_* constants.
425 * Regenerated the list of ioctl names from Linux 3.3.
426 * Enhanced switching between processes with different personalities.
427 * Enhanced signals reporting by using short signal names.
428 * Made ERESTART* messages more descriptive.
429 * Made parsing of numbers from strings more robust.
430 * Added support for compat_statfs64 and statfs64.f_flags.
431 * Changed read of data blocks to use single process_vm_readv syscall
432 (when available) instead of several PTRACE_PEEKDATA operations.
433 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
434 operation instead of several PTRACE_PEEKUSER operations.
435 * Applied various optimizations to make strace work faster.
438 * Implemented proper handling of real SIGTRAPs on kernels supporting
439 PTRACE_O_TRACESYSGOOD.
440 (Addresses Fedora bug #162774).
441 * Fixed sockaddr_un.sun_path name in decoded output.
442 (Addresses Debian bug #554946).
443 * Fixed to avoid potential core file clobbering on exit.
444 (Addresses Debian bug #656398).
445 * Fixed a typo in documentation.
446 (Addresses Debian bug #653309).
447 * Fixed decoding of timer id returned by timer_create.
448 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
449 * Fixed *at syscalls flags decoding.
450 * Fixed ARM EABI 64-bit syscall's arguments decoding.
451 * Fixed semtimedop decoding on s390.
452 * Fixed osf_sigprocmask decoding on alpha.
453 * Fixed ipc and socket subcall decoding on several architectures.
454 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
455 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
456 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
457 * Corrected io_* syscall entries on ARM.
458 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
459 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
460 * Fixed build when libaio-devel is not available.
461 * Fixed configure checks for PTRACE_* constants.
462 * Fixed compilation warnings remained on several architectures.
465 * Removed all non-Linux code. After years of neglect, that dead code
466 just hampered further strace development.
467 * Linux kernel >= 2.6.18 is recommended. Older versions might still
468 work but they haven't been thoroughly tested with this release.
470 Noteworthy changes in release 4.6 (2011-03-15)
471 ==============================================
473 * Changes in behavior
474 * Print diagnostic information about changes in personality mode to
475 standard error instead of standard output.
478 * Implemented a new method of following clone, fork, and vfork
479 syscalls using the Linux kernel's explicit facilities for tracing
480 creation of threads and child processes.
481 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
482 * Implemented decoding of TLS syscalls on m68k.
483 * Implemented biarch support on powerpc64.
484 * Implemented biarch support for getrlimit() and setrlimit().
485 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
486 * Implemented SOL_SCTP socket options decoding.
487 * Added HDIO_* ioctl names.
488 (Addresses Debian bug #450953).
489 * Added LOOP_* ioctl names.
490 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
491 to match Linux 2.6.37.
492 * Updated the list of IPPROTO_* constants to match netinet/in.h.
493 * Implemented decoding of HDIO_* and BLK* ioctls.
494 * Added MicroBlaze architecture support.
495 * Added new syscall entries to match Linux 2.6.37.
496 * Regenerated list of ioctl names from Linux 2.6.37.
497 * Enhanced signal notification decoding.
498 * Documented -C and -D options.
501 * Fixed fetching syscall arguments on m68k.
502 * Fixed an error when judging whether a process has children.
503 * Fixed get/set_robust_list syscall numbers for powerpc.
504 * Fixed a corner case in printing clone flags.
505 * Fixed cross-compiling issues.
506 * Fixed build issues on powerpc64, SH and SPARC.
507 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
508 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
509 fanotify_init, and fanotify_mark syscalls.
510 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
511 * Fixed biarch support in IO dumping.
512 * Fixed raw exit_group decoding.
513 * Fixed decoding of file descriptors on 64-bit architectures.
514 * Fixed a corner case in waitpid handling.
515 (Addresses Red Hat bug #663547).
516 * Fixed stat64 decoding on mips
517 (Addresses Debian bug #599028).
518 * Fixed misleading italics in the manual page.
519 (Addresses Debian bug #589323).
521 Noteworthy changes in release 4.5.20 (2010-04-13)
522 =================================================
525 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
526 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
527 rt_tgsigqueueinfo, perf_event_open.
528 * Enhanced decoding of recently added syscalls on non-x86 architectures
529 by replacing a bare decoder with elaborate parsers enabled earlier
531 * Implemented -C option to combine regular and -c output.
532 (Addresses Debian bug #466196)
533 * Enhanced decoding of mbind and mremap syscalls.
534 * Enhanced SOL_PACKET socket options decoding.
535 * Regenerated list of ioctl names from linux 2.6.33.
536 * Added TILE architecture support.
539 * Fixed build with Linux kernel headers 2.6.32-rc5+.
540 (Addresses Debian bug #560516 and Fedora bug #539044)
541 * Fixed build on mips.
542 * Fixed handling of Linux systems without struct statfs64.
543 * Fixed reporting signal mask by sigreturn on powerpc.
544 * Fixed potential stack buffer overflow in select decoder.
545 (Addresses Fedora bug #556678)
546 * Corrected msgsnd indirect ipccall decoding.
547 * Corrected decoding of 64bit syscalls.
548 (Addresses Debian bug #570603)
549 * Corrected getsockopt decoding on architectures where
550 sizeof(long) > sizeof(int).
551 (Addresses Debian bug #494844)
552 * Corrected decoding of epoll_pwait.
553 (Addresses Debian bug #513014)
554 * Corrected handling of killed threads.
556 Noteworthy changes in release 4.5.19 (2009-10-21)
557 =================================================
559 * Changes in behavior
560 * When command exits, strace now exits with the same exit status.
561 If command is terminated by a signal, strace terminates itself
562 with the same signal, so that strace can be used as a wrapper
563 process transparent to the invoking parent process.
564 When using -p option, the exit status of strace is zero unless
565 there was an unexpected error in doing the tracing.
566 (Addresses Fedora bug #105371 and Debian bug #37665)
569 * Implemented decoding of new Linux syscalls: accept4, dup3,
570 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
571 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
572 * Implemented decoding of accept4 socketcall.
573 * Enhanced prctl decoding.
574 * Enhanced nanosleep decoding.
575 * Enhanced ptrace decoding.
576 * Enhanced futex decoding.
577 * Enhanced CAP_* decoding.
578 * Enhanced SIOCS* ioctls decoding.
579 * Enhanced fcntl F_* flags decoding.
580 * Enhanced semop/semtimedop decoding.
581 * Updated ARM architecture support.
582 * Added Blackfin architecture support.
583 * Added AVR32 architecture support.
584 * Added CRIS architecture support.
585 * Made strace detect when traced process suddenly disappeared.
588 * Fixed syscall numbers for tee and sync_file_range.
589 (Addresses Debian bug #503124)
590 * Fixed several bugs in strings decoder, including potential heap
592 (Addresses Fedora bugs #470529, #478324 and #511035)
593 * Marked sendfile(2) as a network syscall.
594 (Addresses Debian bug #509499)
595 * Fixed accept(2) decoding.
596 (Addresses Debian bug #507573)
597 * Fixed sigtimedwait(2) decoding.
598 * Fixed build on ARM EABI.
599 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
600 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
601 (Addresses Red Hat bug #471169)
602 * Fixed display of 32-bit argv array on 64-bit architectures.
603 (Addresses Fedora bug #519480)
604 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
605 * Fixed HPPA architecture support.
606 (Addresses Debian bugs #437928 and #546619)
611 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
612 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
617 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
618 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
619 * Improved output for prctl system call on Linux.
620 * Improved support for Linux/ARM.
621 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
626 * Improved output for delete_module, futex, and mbind system calls on Linux.
627 * Improved output for SG_IO ioctls on Linux.
628 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
629 eventfd, getcpu, epoll_pwait.
634 * Several biarch improvements.
635 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
636 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
641 * Accept numeric system calls in -e.
646 * Introduce "-e trace=desc".
651 * Better x86-64 support for IA32 processes.
652 * Update PowerPC system calls.
653 * Better printing for Linux aio system calls.
657 * Quick fix release for build issues.
658 * One fix for Linux/ARM system call table.
663 * Print fault address for SIGSEGV/SIGBUS signals when available.
668 * Improve socket ioctl printing.
669 * Update Linux/IA64 syscall list.
670 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
671 * Improve mount flags printing.
672 * Support symbolic printing of x86_64 arch_prctl parameters.
677 * Update syscall tables for Alpha, ARM, HPPA.
678 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
679 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
680 * Improve ioctl command name matching.
681 * Print RTC_* ioctl structure contents.
682 * Support newer RLIMIT_* values.
683 * Print struct cmsghdr details in sendmsg.
688 * Print attribute values in *xattr system calls on Linux.
689 * Include pread and pwrite calls in -e read and -e write tracing.
690 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
691 * Print clock_t values symbolically in Linux clock_* system calls.
695 * Bug fixes, Linux ioctl updates.
696 * David Miller contributed support for Linux/SPARC64.
704 * Update Linux ioctl lists.
705 * Update PF_* and AF_* value lists.
706 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
711 * On Linux using NPTL threads, -p will now attach to all threads in a process.
712 * Handle new mq_* system calls in Linux 2.6.6 and later.
717 * Report some new VM_* bit values on Linux.
718 * Better output for Linux sched_* system calls.
723 * Display multiple ioctl name matches on Linux.
727 * New port to AMD's x86-64 architecture. One strace binary can
728 handle both new x86-64 and old i386 processes.
729 * Fixed support for LFS64 calls.
730 * New switch -E to add/remove environment variables for the command.
731 * Merged s390/s390x port.
732 * Trace an unbounded number of processes.
733 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
734 * Fixed bugs with attach/detach leaving things stopped.
735 * Fixed traced process seeing ECHILD despite live, traced children
736 in waitpid calls with WNOHANG.
737 * Stuart Menefy contributed a port to Linux/SH.
738 * Stephen Thomas contributed a port to Linux/SH64.
739 * Many other bug fixes.
743 * Fix Linux/ia64 support, looks like someone renamed a few things on us
744 * Fix the ioctl setup for Linux, turned out it did not really work.
745 Improve the ioctl extracter as well so we decode some more ones.
749 * compile fixes for Linux/mips
753 * Linux ia64 and hppa ports added
754 * The usual Linux syscall updates (includes 32bit uid/gid support),
755 * Linux ioctl list updated
756 * Support IPv6 scope ids
757 * FreeBSD/i386 port added
758 * UnixWare and Solaris updates
759 * Better support for tracing multithreaded processes in Linux
763 * Compiles on glibc2.0 systems again
764 * Linux/S390 port added
765 * The usual Linux syscall updates
766 * we can follow fork on arm now
770 * Linux/MIPS port added
771 * Lots of Linux updates again
772 * Improved IPv6 support
778 * Compiles on glibc2.0 systems again
782 * Get stat structure properly on Linux 64bit archs
783 * Personalities work again
784 * Compile correctly on SunOS again
790 * Linux (ultra)sparc fixes
797 * add support for more Linux architectures (powerpc, sparc, arm)
798 * support lots more Linux syscalls
799 * fix signal handling
800 * add IPX and IPIP support
801 * check stray syscall after execv
802 * fix hanging children
804 Changes in version 3.1
805 ======================
808 * Linux 68k is supported
809 * Linux alpha is supported
810 * configure is upgraded to autoconf 2.x
811 * using -f in combination with -e now works correctly
812 * output can be piped to a program
813 * tracing setuid programs works better
814 * it is now reasonable to install strace setuid to root in some circumstances
815 * new useful tracing names like file and process to trace whole
816 classes of system calls, e.g. -efile traces all system calls that
817 take a file name as an argument
818 * IPC calls on SunOS 4.1.x are decoded
819 * Linux program memory is reliably dereferenced
820 * Linux decodes at least the name of all syscalls as of pre2.0.4
821 * various cosmetic changes and bug fixes
823 Changes from versions 2.x to version 3.0
824 ========================================
826 * filename arguments are neither abbreviated nor stringified
827 * string arguments are now true C strings using octal instead of hex by default
828 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
829 * by default the output for multiple processes now goes into one file
830 * all structures, vectors, bitsets, etc. use consistent output formats
831 * the -c option now means count calls, -i does what the old -c used to do
833 New Features in version 3.0
834 ===========================
836 * non-ascii strings can be optionally printed entirely in hex
837 * the output format is readable when mutiple processes are generating output
838 * exit values are printed in an alignment column
839 * is is possible to suppress messages about attaching and detaching
840 * various tracing features can be enabled on a per syscall/signal/desc basis
841 * selective tracing of syscalls
842 * selective printing of syscall structures
843 * selective abbreviation of long structures on a per syscall basis
844 * selective printing of raw syscall arguments and results
845 * selective tracing of signals
846 * selective dumping of all I/O read from file descriptors
847 * selective dumping of all I/O written to file descriptors
848 * optional counting of time, calls, and errors for each syscall
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