1 Noteworthy changes in release ?.?? (????-??-??)
4 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
7 * Fixed decoding of lookup_dcookie, inotify_init1, kcmp, process_vm_readv,
8 process_vm_writev, init_module, setns, unshare, kexec_load,
9 name_to_handle_at, mq_timedsend, mq_timedreceive, mq_notify, mq_getsetattr,
11 * Fixed handling of verbose flag in printing of controls array of
12 struct v4l2_ext_controls.
14 Noteworthy changes in release 4.14 (2016-10-04)
15 ===============================================
18 * When using -p option without a command and no processes has been attached,
19 strace exits with exit status 1.
22 * Added printing of the mode argument of open and openat syscalls
23 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
24 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
25 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
26 and aio family syscalls.
27 * Implemented fetching of the 7th subcall argument on mips o32.
28 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
30 * Updated lists of ioctl commands from Linux 4.8.
31 * Added decoding of new syscalls on sh and sh64.
32 * Added RISC-V architecture support.
35 * Marked io_setup and io_destroy as memory mapping related syscalls.
36 * Fixed leakage of placeholder descriptors to tracees.
37 * Fixed printing of mode_t, umode_t, and umask types.
38 * Fixed decoding of iovec arrays without a limit on total data size.
39 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
40 and ipc family syscalls.
41 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
42 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
44 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
45 * Fixed decoding of struct stat64 on sparc64.
46 * Fixed decoding of uid and gid-related syscalls on sparc64.
47 * Fixed decoding of the forth argument of semctl syscall on sparc64.
48 * Fixed values of tty ioctl constants on sparc64.
49 * Fixed sparc personality support on sparc64.
51 Noteworthy changes in release 4.13 (2016-07-26)
52 ===============================================
55 * Implemented a general netlink socket parser.
56 * Enhanced decoding of socket addresses.
57 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
58 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
59 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
60 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
61 and *_MAGIC constants.
62 * Updated lists of ioctl commands from Linux 4.7.
65 * Fixed decoding of pid_t argument of prlimit64 syscall.
66 * Fixed sign extension issues in the parser of struct rusage.
67 * Fixed race condition in decoding of timeout argument of recvmmsg and
68 rt_sigtimedwait syscalls.
69 * Fixed build with fresh linux kernel headers.
71 Noteworthy changes in release 4.12 (2016-05-31)
72 ===============================================
75 * Implemented simultaneous use of -p option and tracing of a command.
76 (addresses Debian bug #549942).
77 * Implemented caching of netlink conversations to reduce amount of time
78 spent in decoding socket details in -yy mode.
79 * Implemented -yy mode decoding of protocol:portid pairs associated with
80 netlink socket descriptors.
81 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
82 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
84 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
85 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
86 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
87 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
88 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
89 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
90 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
91 statfs64, tgkill, waitid, and xattr family syscalls.
92 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
93 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
94 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
95 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
96 * Added decoding of fadvise64 and fadvise64_64 on s390.
97 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
98 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
99 * Updated lists of ioctl commands from Linux 4.6.
102 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
103 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
104 * Fixed decoding of mlock2 syscall on sparc.
105 * Fixed decoding of osf_shmat syscall on alpha.
106 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
107 (addresses Debian bug #485979 and Fedora bug #1298294).
108 * Fixed decoding of preadv syscall in case of short read.
109 * Fixed decoding and dumping of readv syscall in case of short read.
110 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
111 * Fixed decoding of mincore syscall's last argument.
112 * Fixed remaining errors in mapping between syscall numbers and numbers
113 of syscall arguments.
114 * Applied various fixes to strace-graph script.
116 Noteworthy changes in release 4.11 (2015-12-21)
117 ===============================================
119 * Changes in behavior
120 * Some syscalls have different names depending on architecture and
121 personality. In these cases, syscall filtering and printing now
122 consistently uses the names that match corresponding __NR_* kernel
123 macros of the tracee's architecture and personality.
124 * Added strace prefix to all diagnostic messages.
127 * Enhanced and extended test suite.
128 * Implemented reliable tracing of processes whose personality differs
129 from the personality of strace, fixed decoding of 32-bit personality
130 syscalls on 64-bit architectures.
131 * When some data referenced by syscall arguments is irrelevant or cannot
132 be read from tracee's memory, strace now prints its address consistently.
133 * When a syscall is restarted using restart_syscall mechanism, strace now
134 shows the syscall name on architectures that expose this information.
135 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
136 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
137 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
138 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
139 * Optimized decoding of indirect socket syscalls.
140 * Implemented decoding of nanoseconds along with seconds in stat family
141 syscalls (addresses Fedora bug #1251176).
142 * Implemented decoding of struct statfs.f_flags in statfs syscall.
143 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
145 * Implemented decoding of indirect syscall on mips o32.
146 * Implemented decoding of IPPROTO_IP control messages.
147 * Implemented decoding of setsockopt syscall multicast arguments.
148 * Enhanced decoding of struct sigevent.
149 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
150 and v4l2 ioctl syscall arguments.
151 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
152 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
153 sendfile, setsockopt, and shmctl syscalls.
154 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
155 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
156 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
157 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
158 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
159 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
161 * Added Nios II architecture support.
162 * Added new syscall entries to match Linux 4.4.
165 * Fixed potential short read of strings from tracee's memory.
166 * Fixed -qq option in conjunction with -o option.
167 * Fixed filtering of <unavailable> syscalls.
168 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
169 with 64-bit aligned structures.
170 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
171 syscall flags arguments.
172 * Fixed decoding of 4th argument of clock_nanosleep syscall.
173 * Fixed decoding of getpagesize syscall on m68k.
174 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
175 * Fixed decoding of timezone argument of gettimeofday and settimeofday
177 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
179 * Fixed decoding of pipe syscall on alpha and mips.
180 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
181 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
182 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
184 * Fixed decoding of 4th argument of semctl indirect syscall.
185 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
186 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
187 * Fixed decoding of struct dirent on x32.
188 * Fixed decoding of times syscall return value on mips n32 and x32.
189 * Fixed decoding of path argument of umount2 syscall
190 (addresses Debian bug #785050).
191 * Worked around a kernel bug in tracing privileged executables.
192 * Fixed various errors in mapping between syscall numbers and associated
193 information like the number of syscall arguments, the name of syscall,
196 Noteworthy changes in release 4.10 (2015-03-06)
197 ===============================================
200 * Added -yy option to print protocol and address information associated with
202 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
203 recvmsg, sendmmsg, and recvmmsg syscalls.
204 * Implemented full 32-bit decoding of ioctl commands
205 (addresses Debian bug #692913 and Fedora bug #902788).
206 * Implemented PTRACE_GETREGS API support on ia64.
207 * Implemented PTRACE_GETREGS API support on mips.
208 * Implemented PTRACE_GETREGSET API support on s390/s390x.
209 * Implemented decoding of getrandom and seccomp syscalls.
210 * Implemented full decoding of 64-bit capability sets.
211 * Implemented decoding of all prctl commands.
212 * Implemented decoding of parametrized ioctl commands.
213 * Implemented decoding of evdev ioctl commands.
214 * Implemented decoding of v4l ioctl commands.
215 * Implemented decoding of SG_IO v4 ioctl commands.
216 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
217 * Implemented decoding of FALLOC_FL_* fallocate flags.
218 * Implemented decoding of rt_sigreturn signal mask on aarch64,
220 * Enhanced socket decoder to support bluetooth sockets.
221 * Enhanced decoding of unlisted ioctl commands.
222 * Enhanced decoding of getsockopt and setsockopt syscall.
223 * Enhanced decoding of sysinfo syscall.
224 * Enhanced decoding of struct cmsghdr.
225 * Enhanced decoding of wait status.
226 * Enhanced aio support on non-x86 architectures by using external libaio.h.
227 * Added O_TMPFILE to the list of recognized open mode flags.
228 * Updated the list of filesystem type constants that is used in decoding
229 statfs family syscalls.
230 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
232 * Updated lists of signal constants from Linux 3.19.
233 * Updated lists of errno constants from Linux 3.19.
234 * Updated lists of ioctl commands from Linux 3.9.
235 * Added new syscall entries to match Linux 3.19.
238 * Fixed various errors in mapping between syscall numbers and associated
239 information like the number of syscall arguments, the name of syscall,
241 * Fixed quoting issues in printing descriptors, filenames, network interface
242 names, struct utsname members, device/volume names of BLK* ioctl commands.
243 * Fixed uid_t/git_t decoding.
244 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
245 * Fixed potential open flags truncation on some architectures.
246 * Fixed decoding of struct ifreq.ifr_name.
247 * Fixed decoding of SIOCSIFNAME ioctl command.
248 * Fixed decoding of RENAME_* renameat2 flags.
249 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
250 * Fixed decoding of indirect ipc subcalls on some architectures.
251 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
252 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
253 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
254 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
255 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
256 sparc, sparc64, mips, and s390.
257 * Fixed instruction pointer output (-i option) on architectures that support
258 several personalities.
259 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
261 * Fixed build on systems where struct sigaction has no sa_restorer member.
262 * Fixed build with uclibc and musl libc.
265 * Linux kernel >= 2.5.46 is required.
266 Older versions without a decent PTRACE_SETOPTIONS support will not work.
267 * On mips, linux kernel >= 2.6.15 is required.
268 Older versions without a decent PTRACE_GETREGS support will not work.
269 * On s390 and s390x, linux kernel >= 2.6.27 is required.
270 Older versions without a decent PTRACE_GETREGSET support will not work.
272 Noteworthy changes in release 4.9 (2014-08-15)
273 ==============================================
275 * Changes in behavior
276 * Disabled OABI support on ARM EABI systems by default,
277 added --enable-arm-oabi option to enable it at configure time.
280 * Added experimental -k option to print stack trace after each traced syscall.
281 * Added -w option to produce stats on syscall latency.
282 (addresses Debian bug #457497).
283 * Added ARC architecture support.
284 * Added PTRACE_GETREGS API support on PowerPC.
285 * Enhanced Bionic libc and musl libc support.
286 * Enhanced tracing of x86 personality processes on x86_64 and x32.
287 * Enhanced tracing of ARM personality processes on AArch64.
288 * Enhanced 32/64bit personality detection on PowerPC.
289 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
290 renameat2, and request_key syscalls.
291 * Robustified decoding of select, pselect, and io_submit syscalls.
292 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
293 setdomainname, sethostname, setns, and sync_file_range syscalls.
294 * Enhanced decoding of signal bitmasks.
295 * Enhanced decoding of file descriptors.
296 * Enhanced siginfo_t decoding.
297 * Enhanced PF_NETLINK decoding.
298 * Updated CLOCK_* constants
299 (addresses Fedora bug #1088455).
300 * Added new syscall entries to match Linux 3.16.
303 * Added shmat and shmdt to the set of memory mapping related syscalls.
304 * Fixed detaching from stopped processes.
305 * Fixed fanotify_mark decoding on 32bit architectures.
306 * Fixed offset decoding in preadv and pwritev syscalls.
307 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
308 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
309 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
310 (addresses Fedora bug #993384).
311 * Miscellaneous corrections in the manual page.
312 (Addresses Debian bug #725987).
314 Noteworthy changes in release 4.8 (2013-06-03)
315 ==============================================
317 * Changes in behavior
318 * In case of normal strace termination, when the trace output is
319 redirected to a pipe, strace now closes it and waits for the pipe
320 process termination before exit.
323 * Implemented tracing using PTRACE_SEIZE API (when available).
324 * Implemented more reliable PTRACE_GETREGSET-based process personality
325 detection on x86-64 and x32 (when available).
326 * Added -e trace=memory option for tracing memory mapping related syscalls.
327 * Documented -b option.
328 * Allowed exit status messages to be suppressed by giving -q option twice.
329 * Added AArch64 architecture support
330 (addresses Debian bug #693074 and Fedora bug #969858).
331 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
332 * Added tilegx personality support for Tile.
333 * Enhanced support of NOMMU architectures.
334 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
336 * Added new syscall entries to match Linux 3.9.
337 * Regenerated the list of common ioctl names from Linux 3.9.
338 * Updated the list of errno constants.
339 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
340 PTRACE_O_*, and TCP_* constants.
341 * Implemented decoding of UBI ioctls.
342 * Removed redundant "*32" ioctl names.
345 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
346 (addresses Fedora bug #659382).
347 * Fixed kernel release string parsing
348 (addresses Debian bug #702309).
349 * Fixed decoding of *xattr syscalls
350 (addresses Fedora bug #885233).
351 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
352 (addresses Fedora bug #912790).
353 * Fixed tracing forks on SPARC.
354 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
355 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
356 and truncate64 syscalls.
357 * Fixed categories of multiple syscalls on most of supported architectures.
358 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
359 * Fixed decoding of multiple 32-bit personality syscalls on x32.
360 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
361 S390x, and Tile architectures.
362 * Fixed semtimedop decoding on S390x.
363 * Fixed sram_alloc decoding on Blackfin.
364 * Fixed build when process_vm_readv is a stab.
365 * Fixed build with older versions of libaio.h.
367 Noteworthy changes in release 4.7 (2012-05-02)
368 ==============================================
370 * Changes in behavior
371 * strace no longer suspends waitpid until there is a child
372 for waitpid'ing process to collect status from.
373 * strace no longer detaches from a tracee which is supposed
375 * strace now issues a new message: "+++ exited with EXITCODE +++"
376 which shows exact moment strace got exit notification,
377 analogous to existing "+++ killed by SIG +++" message.
380 * Added x32 personality support (x86_64 architecture).
381 * Added -y and -P options to print file descriptor paths and
382 filter by those paths.
383 * Added -I option to control strace interactivity.
384 * Allowed -p option to take comma or whitespace-separated list of PIDs.
385 * Added strace_log_merge script helper to merge timestamped "strace -ff"
387 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
388 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
389 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
390 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
391 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
392 listxattr, setrlimit and swapon syscalls.
393 * Implemented decoding of loop and mtd ioctls.
394 * Added syscall entries for new linux syscalls.
395 * Added syscall entries for direct socket system calls on powerpc.
396 * Updated the list of errno constants.
397 * Updated lists of MSG_*, STA_*, and TCP_* constants.
398 * Regenerated the list of ioctl names from Linux 3.3.
399 * Enhanced switching between processes with different personalities.
400 * Enhanced signals reporting by using short signal names.
401 * Made ERESTART* messages more descriptive.
402 * Made parsing of numbers from strings more robust.
403 * Added support for compat_statfs64 and statfs64.f_flags.
404 * Changed read of data blocks to use single process_vm_readv syscall
405 (when available) instead of several PTRACE_PEEKDATA operations.
406 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
407 operation instead of several PTRACE_PEEKUSER operations.
408 * Applied various optimizations to make strace work faster.
411 * Implemented proper handling of real SIGTRAPs on kernels supporting
412 PTRACE_O_TRACESYSGOOD.
413 (Addresses Fedora bug #162774).
414 * Fixed sockaddr_un.sun_path name in decoded output.
415 (Addresses Debian bug #554946).
416 * Fixed to avoid potential core file clobbering on exit.
417 (Addresses Debian bug #656398).
418 * Fixed a typo in documentation.
419 (Addresses Debian bug #653309).
420 * Fixed decoding of timer id returned by timer_create.
421 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
422 * Fixed *at syscalls flags decoding.
423 * Fixed ARM EABI 64-bit syscall's arguments decoding.
424 * Fixed semtimedop decoding on s390.
425 * Fixed osf_sigprocmask decoding on alpha.
426 * Fixed ipc and socket subcall decoding on several architectures.
427 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
428 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
429 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
430 * Corrected io_* syscall entries on ARM.
431 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
432 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
433 * Fixed build when libaio-devel is not available.
434 * Fixed configure checks for PTRACE_* constants.
435 * Fixed compilation warnings remained on several architectures.
438 * Removed all non-Linux code. After years of neglect, that dead code
439 just hampered further strace development.
440 * Linux kernel >= 2.6.18 is recommended. Older versions might still
441 work but they haven't been thoroughly tested with this release.
443 Noteworthy changes in release 4.6 (2011-03-15)
444 ==============================================
446 * Changes in behavior
447 * Print diagnostic information about changes in personality mode to
448 standard error instead of standard output.
451 * Implemented a new method of following clone, fork, and vfork
452 syscalls using the Linux kernel's explicit facilities for tracing
453 creation of threads and child processes.
454 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
455 * Implemented decoding of TLS syscalls on m68k.
456 * Implemented biarch support on powerpc64.
457 * Implemented biarch support for getrlimit() and setrlimit().
458 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
459 * Implemented SOL_SCTP socket options decoding.
460 * Added HDIO_* ioctl names.
461 (Addresses Debian bug #450953).
462 * Added LOOP_* ioctl names.
463 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
464 to match Linux 2.6.37.
465 * Updated the list of IPPROTO_* constants to match netinet/in.h.
466 * Implemented decoding of HDIO_* and BLK* ioctls.
467 * Added MicroBlaze architecture support.
468 * Added new syscall entries to match Linux 2.6.37.
469 * Regenerated list of ioctl names from Linux 2.6.37.
470 * Enhanced signal notification decoding.
471 * Documented -C and -D options.
474 * Fixed fetching syscall arguments on m68k.
475 * Fixed an error when judging whether a process has children.
476 * Fixed get/set_robust_list syscall numbers for powerpc.
477 * Fixed a corner case in printing clone flags.
478 * Fixed cross-compiling issues.
479 * Fixed build issues on powerpc64, SH and SPARC.
480 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
481 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
482 fanotify_init, and fanotify_mark syscalls.
483 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
484 * Fixed biarch support in IO dumping.
485 * Fixed raw exit_group decoding.
486 * Fixed decoding of file descriptors on 64-bit architectures.
487 * Fixed a corner case in waitpid handling.
488 (Addresses Red Hat bug #663547).
489 * Fixed stat64 decoding on mips
490 (Addresses Debian bug #599028).
491 * Fixed misleading italics in the manual page.
492 (Addresses Debian bug #589323).
494 Noteworthy changes in release 4.5.20 (2010-04-13)
495 =================================================
498 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
499 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
500 rt_tgsigqueueinfo, perf_event_open.
501 * Enhanced decoding of recently added syscalls on non-x86 architectures
502 by replacing a bare decoder with elaborate parsers enabled earlier
504 * Implemented -C option to combine regular and -c output.
505 (Addresses Debian bug #466196)
506 * Enhanced decoding of mbind and mremap syscalls.
507 * Enhanced SOL_PACKET socket options decoding.
508 * Regenerated list of ioctl names from linux 2.6.33.
509 * Added TILE architecture support.
512 * Fixed build with Linux kernel headers 2.6.32-rc5+.
513 (Addresses Debian bug #560516 and Fedora bug #539044)
514 * Fixed build on mips.
515 * Fixed handling of Linux systems without struct statfs64.
516 * Fixed reporting signal mask by sigreturn on powerpc.
517 * Fixed potential stack buffer overflow in select decoder.
518 (Addresses Fedora bug #556678)
519 * Corrected msgsnd indirect ipccall decoding.
520 * Corrected decoding of 64bit syscalls.
521 (Addresses Debian bug #570603)
522 * Corrected getsockopt decoding on architectures where
523 sizeof(long) > sizeof(int).
524 (Addresses Debian bug #494844)
525 * Corrected decoding of epoll_pwait.
526 (Addresses Debian bug #513014)
527 * Corrected handling of killed threads.
529 Noteworthy changes in release 4.5.19 (2009-10-21)
530 =================================================
532 * Changes in behavior
533 * When command exits, strace now exits with the same exit status.
534 If command is terminated by a signal, strace terminates itself
535 with the same signal, so that strace can be used as a wrapper
536 process transparent to the invoking parent process.
537 When using -p option, the exit status of strace is zero unless
538 there was an unexpected error in doing the tracing.
539 (Addresses Fedora bug #105371 and Debian bug #37665)
542 * Implemented decoding of new Linux syscalls: accept4, dup3,
543 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
544 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
545 * Implemented decoding of accept4 socketcall.
546 * Enhanced prctl decoding.
547 * Enhanced nanosleep decoding.
548 * Enhanced ptrace decoding.
549 * Enhanced futex decoding.
550 * Enhanced CAP_* decoding.
551 * Enhanced SIOCS* ioctls decoding.
552 * Enhanced fcntl F_* flags decoding.
553 * Enhanced semop/semtimedop decoding.
554 * Updated ARM architecture support.
555 * Added Blackfin architecture support.
556 * Added AVR32 architecture support.
557 * Added CRIS architecture support.
558 * Made strace detect when traced process suddenly disappeared.
561 * Fixed syscall numbers for tee and sync_file_range.
562 (Addresses Debian bug #503124)
563 * Fixed several bugs in strings decoder, including potential heap
565 (Addresses Fedora bugs #470529, #478324 and #511035)
566 * Marked sendfile(2) as a network syscall.
567 (Addresses Debian bug #509499)
568 * Fixed accept(2) decoding.
569 (Addresses Debian bug #507573)
570 * Fixed sigtimedwait(2) decoding.
571 * Fixed build on ARM EABI.
572 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
573 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
574 (Addresses Red Hat bug #471169)
575 * Fixed display of 32-bit argv array on 64-bit architectures.
576 (Addresses Fedora bug #519480)
577 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
578 * Fixed HPPA architecture support.
579 (Addresses Debian bugs #437928 and #546619)
584 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
585 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
590 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
591 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
592 * Improved output for prctl system call on Linux.
593 * Improved support for Linux/ARM.
594 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
599 * Improved output for delete_module, futex, and mbind system calls on Linux.
600 * Improved output for SG_IO ioctls on Linux.
601 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
602 eventfd, getcpu, epoll_pwait.
607 * Several biarch improvements.
608 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
609 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
614 * Accept numeric system calls in -e.
619 * Introduce "-e trace=desc".
624 * Better x86-64 support for IA32 processes.
625 * Update PowerPC system calls.
626 * Better printing for Linux aio system calls.
630 * Quick fix release for build issues.
631 * One fix for Linux/ARM system call table.
636 * Print fault address for SIGSEGV/SIGBUS signals when available.
641 * Improve socket ioctl printing.
642 * Update Linux/IA64 syscall list.
643 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
644 * Improve mount flags printing.
645 * Support symbolic printing of x86_64 arch_prctl parameters.
650 * Update syscall tables for Alpha, ARM, HPPA.
651 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
652 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
653 * Improve ioctl command name matching.
654 * Print RTC_* ioctl structure contents.
655 * Support newer RLIMIT_* values.
656 * Print struct cmsghdr details in sendmsg.
661 * Print attribute values in *xattr system calls on Linux.
662 * Include pread and pwrite calls in -e read and -e write tracing.
663 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
664 * Print clock_t values symbolically in Linux clock_* system calls.
668 * Bug fixes, Linux ioctl updates.
669 * David Miller contributed support for Linux/SPARC64.
677 * Update Linux ioctl lists.
678 * Update PF_* and AF_* value lists.
679 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
684 * On Linux using NPTL threads, -p will now attach to all threads in a process.
685 * Handle new mq_* system calls in Linux 2.6.6 and later.
690 * Report some new VM_* bit values on Linux.
691 * Better output for Linux sched_* system calls.
696 * Display multiple ioctl name matches on Linux.
700 * New port to AMD's x86-64 architecture. One strace binary can
701 handle both new x86-64 and old i386 processes.
702 * Fixed support for LFS64 calls.
703 * New switch -E to add/remove environment variables for the command.
704 * Merged s390/s390x port.
705 * Trace an unbounded number of processes.
706 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
707 * Fixed bugs with attach/detach leaving things stopped.
708 * Fixed traced process seeing ECHILD despite live, traced children
709 in waitpid calls with WNOHANG.
710 * Stuart Menefy contributed a port to Linux/SH.
711 * Stephen Thomas contributed a port to Linux/SH64.
712 * Many other bug fixes.
716 * Fix Linux/ia64 support, looks like someone renamed a few things on us
717 * Fix the ioctl setup for Linux, turned out it did not really work.
718 Improve the ioctl extracter as well so we decode some more ones.
722 * compile fixes for Linux/mips
726 * Linux ia64 and hppa ports added
727 * The usual Linux syscall updates (includes 32bit uid/gid support),
728 * Linux ioctl list updated
729 * Support IPv6 scope ids
730 * FreeBSD/i386 port added
731 * UnixWare and Solaris updates
732 * Better support for tracing multithreaded processes in Linux
736 * Compiles on glibc2.0 systems again
737 * Linux/S390 port added
738 * The usual Linux syscall updates
739 * we can follow fork on arm now
743 * Linux/MIPS port added
744 * Lots of Linux updates again
745 * Improved IPv6 support
751 * Compiles on glibc2.0 systems again
755 * Get stat structure properly on Linux 64bit archs
756 * Personalities work again
757 * Compile correctly on SunOS again
763 * Linux (ultra)sparc fixes
770 * add support for more Linux architectures (powerpc, sparc, arm)
771 * support lots more Linux syscalls
772 * fix signal handling
773 * add IPX and IPIP support
774 * check stray syscall after execv
775 * fix hanging children
777 Changes in version 3.1
778 ======================
781 * Linux 68k is supported
782 * Linux alpha is supported
783 * configure is upgraded to autoconf 2.x
784 * using -f in combination with -e now works correctly
785 * output can be piped to a program
786 * tracing setuid programs works better
787 * it is now reasonable to install strace setuid to root in some circumstances
788 * new useful tracing names like file and process to trace whole
789 classes of system calls, e.g. -efile traces all system calls that
790 take a file name as an argument
791 * IPC calls on SunOS 4.1.x are decoded
792 * Linux program memory is reliably dereferenced
793 * Linux decodes at least the name of all syscalls as of pre2.0.4
794 * various cosmetic changes and bug fixes
796 Changes from versions 2.x to version 3.0
797 ========================================
799 * filename arguments are neither abbreviated nor stringified
800 * string arguments are now true C strings using octal instead of hex by default
801 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
802 * by default the output for multiple processes now goes into one file
803 * all structures, vectors, bitsets, etc. use consistent output formats
804 * the -c option now means count calls, -i does what the old -c used to do
806 New Features in version 3.0
807 ===========================
809 * non-ascii strings can be optionally printed entirely in hex
810 * the output format is readable when mutiple processes are generating output
811 * exit values are printed in an alignment column
812 * is is possible to suppress messages about attaching and detaching
813 * various tracing features can be enabled on a per syscall/signal/desc basis
814 * selective tracing of syscalls
815 * selective printing of syscall structures
816 * selective abbreviation of long structures on a per syscall basis
817 * selective printing of raw syscall arguments and results
818 * selective tracing of signals
819 * selective dumping of all I/O read from file descriptors
820 * selective dumping of all I/O written to file descriptors
821 * optional counting of time, calls, and errors for each syscall
projects / strace / blob