1 Noteworthy changes in release ?.?? (????-??-??)
2 ===============================================
5 * Implemented simultaneous use of -p option and tracing of a command.
6 (addresses Debian bug #549942).
7 * Enhanced decoding of personality, sched_getaffinity,
8 and sched_setaffinity syscalls.
9 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
10 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
11 * Implemented caching of netlink conversations to reduce amount of time
12 spent in decoding socket details in -yy mode.
13 * Implemented decoding of copy_file_range syscall.
14 * Implemented dumping of vmsplice syscall.
15 * Updated lists of ioctl commands from Linux 4.5.
18 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
19 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
20 * Fixed decoding of mlock2 syscall on sparc.
21 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
22 (addresses Debian bug #485979 and Fedora bug #1298294).
23 * Fixed decoding of preadv syscall in case of short read.
24 * Fixed decoding and dumping of readv syscall in case of short read.
25 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
26 * Fixed decoding of mincore syscall's last argument.
27 * Fixed remaining errors in mapping between syscall numbers and numbers
30 Noteworthy changes in release 4.11 (2015-12-21)
31 ===============================================
34 * Some syscalls have different names depending on architecture and
35 personality. In these cases, syscall filtering and printing now
36 consistently uses the names that match corresponding __NR_* kernel
37 macros of the tracee's architecture and personality.
38 * Added strace prefix to all diagnostic messages.
41 * Enhanced and extended test suite.
42 * Implemented reliable tracing of processes whose personality differs
43 from the personality of strace, fixed decoding of 32-bit personality
44 syscalls on 64-bit architectures.
45 * When some data referenced by syscall arguments is irrelevant or cannot
46 be read from tracee's memory, strace now prints its address consistently.
47 * When a syscall is restarted using restart_syscall mechanism, strace now
48 shows the syscall name on architectures that expose this information.
49 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
50 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
51 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
52 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
53 * Optimized decoding of indirect socket syscalls.
54 * Implemented decoding of nanoseconds along with seconds in stat family
55 syscalls (addresses Fedora bug #1251176).
56 * Implemented decoding of struct statfs.f_flags in statfs syscall.
57 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
59 * Implemented decoding of indirect syscall on mips o32.
60 * Implemented decoding of IPPROTO_IP control messages.
61 * Implemented decoding of setsockopt syscall multicast arguments.
62 * Enhanced decoding of struct sigevent.
63 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
64 and v4l2 ioctl syscall arguments.
65 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
66 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
67 sendfile, setsockopt, and shmctl syscalls.
68 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
69 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
70 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
71 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
72 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
73 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
75 * Added Nios II architecture support.
76 * Added new syscall entries to match Linux 4.4.
79 * Fixed potential short read of strings from tracee's memory.
80 * Fixed -qq option in conjunction with -o option.
81 * Fixed filtering of <unavailable> syscalls.
82 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
83 with 64-bit aligned structures.
84 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
85 syscall flags arguments.
86 * Fixed decoding of 4th argument of clock_nanosleep syscall.
87 * Fixed decoding of getpagesize syscall on m68k.
88 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
89 * Fixed decoding of timezone argument of gettimeofday and settimeofday
91 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
93 * Fixed decoding of pipe syscall on alpha and mips.
94 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
95 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
96 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
98 * Fixed decoding of 4th argument of semctl indirect syscall.
99 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
100 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
101 * Fixed decoding of struct dirent on x32.
102 * Fixed decoding of times syscall return value on mips n32 and x32.
103 * Fixed decoding of path argument of umount2 syscall
104 (addresses Debian bug #785050).
105 * Worked around a kernel bug in tracing privileged executables.
106 * Fixed various errors in mapping between syscall numbers and associated
107 information like the number of syscall arguments, the name of syscall,
110 Noteworthy changes in release 4.10 (2015-03-06)
111 ===============================================
114 * Added -yy option to print protocol and address information associated with
116 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
117 recvmsg, sendmmsg, and recvmmsg syscalls.
118 * Implemented full 32-bit decoding of ioctl commands
119 (addresses Debian bug #692913 and Fedora bug #902788).
120 * Implemented PTRACE_GETREGS API support on ia64.
121 * Implemented PTRACE_GETREGS API support on mips.
122 * Implemented PTRACE_GETREGSET API support on s390/s390x.
123 * Implemented decoding of getrandom and seccomp syscalls.
124 * Implemented full decoding of 64-bit capability sets.
125 * Implemented decoding of all prctl commands.
126 * Implemented decoding of parametrized ioctl commands.
127 * Implemented decoding of evdev ioctl commands.
128 * Implemented decoding of v4l ioctl commands.
129 * Implemented decoding of SG_IO v4 ioctl commands.
130 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
131 * Implemented decoding of FALLOC_FL_* fallocate flags.
132 * Implemented decoding of rt_sigreturn signal mask on aarch64,
134 * Enhanced socket decoder to support bluetooth sockets.
135 * Enhanced decoding of unlisted ioctl commands.
136 * Enhanced decoding of getsockopt and setsockopt syscall.
137 * Enhanced decoding of sysinfo syscall.
138 * Enhanced decoding of struct cmsghdr.
139 * Enhanced decoding of wait status.
140 * Enhanced aio support on non-x86 architectures by using external libaio.h.
141 * Added O_TMPFILE to the list of recognized open mode flags.
142 * Updated the list of filesystem type constants that is used in decoding
143 statfs family syscalls.
144 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
146 * Updated lists of signal constants from Linux 3.19.
147 * Updated lists of errno constants from Linux 3.19.
148 * Updated lists of ioctl commands from Linux 3.9.
149 * Added new syscall entries to match Linux 3.19.
152 * Fixed various errors in mapping between syscall numbers and associated
153 information like the number of syscall arguments, the name of syscall,
155 * Fixed quoting issues in printing descriptors, filenames, network interface
156 names, struct utsname members, device/volume names of BLK* ioctl commands.
157 * Fixed uid_t/git_t decoding.
158 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
159 * Fixed potential open flags truncation on some architectures.
160 * Fixed decoding of struct ifreq.ifr_name.
161 * Fixed decoding of SIOCSIFNAME ioctl command.
162 * Fixed decoding of RENAME_* renameat2 flags.
163 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
164 * Fixed decoding of indirect ipc subcalls on some architectures.
165 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
166 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
167 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
168 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
169 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
170 sparc, sparc64, mips, and s390.
171 * Fixed instruction pointer output (-i option) on architectures that support
172 several personalities.
173 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
175 * Fixed build on systems where struct sigaction has no sa_restorer member.
176 * Fixed build with uclibc and musl libc.
179 * Linux kernel >= 2.5.46 is required.
180 Older versions without a decent PTRACE_SETOPTIONS support will not work.
181 * On mips, linux kernel >= 2.6.15 is required.
182 Older versions without a decent PTRACE_GETREGS support will not work.
183 * On s390 and s390x, linux kernel >= 2.6.27 is required.
184 Older versions without a decent PTRACE_GETREGSET support will not work.
186 Noteworthy changes in release 4.9 (2014-08-15)
187 ==============================================
189 * Changes in behavior
190 * Disabled OABI support on ARM EABI systems by default,
191 added --enable-arm-oabi option to enable it at configure time.
194 * Added experimental -k option to print stack trace after each traced syscall.
195 * Added -w option to produce stats on syscall latency.
196 (addresses Debian bug #457497).
197 * Added ARC architecture support.
198 * Added PTRACE_GETREGS API support on PowerPC.
199 * Enhanced Bionic libc and musl libc support.
200 * Enhanced tracing of x86 personality processes on x86_64 and x32.
201 * Enhanced tracing of ARM personality processes on AArch64.
202 * Enhanced 32/64bit personality detection on PowerPC.
203 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
204 renameat2, and request_key syscalls.
205 * Robustified decoding of select, pselect, and io_submit syscalls.
206 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
207 setdomainname, sethostname, setns, and sync_file_range syscalls.
208 * Enhanced decoding of signal bitmasks.
209 * Enhanced decoding of file descriptors.
210 * Enhanced siginfo_t decoding.
211 * Enhanced PF_NETLINK decoding.
212 * Updated CLOCK_* constants
213 (addresses Fedora bug #1088455).
214 * Added new syscall entries to match Linux 3.16.
217 * Added shmat and shmdt to the set of memory mapping related syscalls.
218 * Fixed detaching from stopped processes.
219 * Fixed fanotify_mark decoding on 32bit architectures.
220 * Fixed offset decoding in preadv and pwritev syscalls.
221 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
222 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
223 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
224 (addresses Fedora bug #993384).
225 * Miscellaneous corrections in the manual page.
226 (Addresses Debian bug #725987).
228 Noteworthy changes in release 4.8 (2013-06-03)
229 ==============================================
231 * Changes in behavior
232 * In case of normal strace termination, when the trace output is
233 redirected to a pipe, strace now closes it and waits for the pipe
234 process termination before exit.
237 * Implemented tracing using PTRACE_SEIZE API (when available).
238 * Implemented more reliable PTRACE_GETREGSET-based process personality
239 detection on x86-64 and x32 (when available).
240 * Added -e trace=memory option for tracing memory mapping related syscalls.
241 * Documented -b option.
242 * Allowed exit status messages to be suppressed by giving -q option twice.
243 * Added AArch64 architecture support
244 (addresses Debian bug #693074 and Fedora bug #969858).
245 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
246 * Added tilegx personality support for Tile.
247 * Enhanced support of NOMMU architectures.
248 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
250 * Added new syscall entries to match Linux 3.9.
251 * Regenerated the list of common ioctl names from Linux 3.9.
252 * Updated the list of errno constants.
253 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
254 PTRACE_O_*, and TCP_* constants.
255 * Implemented decoding of UBI ioctls.
256 * Removed redundant "*32" ioctl names.
259 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
260 (addresses Fedora bug #659382).
261 * Fixed kernel release string parsing
262 (addresses Debian bug #702309).
263 * Fixed decoding of *xattr syscalls
264 (addresses Fedora bug #885233).
265 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
266 (addresses Fedora bug #912790).
267 * Fixed tracing forks on SPARC.
268 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
269 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
270 and truncate64 syscalls.
271 * Fixed categories of multiple syscalls on most of supported architectures.
272 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
273 * Fixed decoding of multiple 32-bit personality syscalls on x32.
274 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
275 S390x, and Tile architectures.
276 * Fixed semtimedop decoding on S390x.
277 * Fixed sram_alloc decoding on Blackfin.
278 * Fixed build when process_vm_readv is a stab.
279 * Fixed build with older versions of libaio.h.
281 Noteworthy changes in release 4.7 (2012-05-02)
282 ==============================================
284 * Changes in behavior
285 * strace no longer suspends waitpid until there is a child
286 for waitpid'ing process to collect status from.
287 * strace no longer detaches from a tracee which is supposed
289 * strace now issues a new message: "+++ exited with EXITCODE +++"
290 which shows exact moment strace got exit notification,
291 analogous to existing "+++ killed by SIG +++" message.
294 * Added x32 personality support (x86_64 architecture).
295 * Added -y and -P options to print file descriptor paths and
296 filter by those paths.
297 * Added -I option to control strace interactivity.
298 * Allowed -p option to take comma or whitespace-separated list of PIDs.
299 * Added strace_log_merge script helper to merge timestamped "strace -ff"
301 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
302 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
303 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
304 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
305 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
306 listxattr, setrlimit and swapon syscalls.
307 * Implemented decoding of loop and mtd ioctls.
308 * Added syscall entries for new linux syscalls.
309 * Added syscall entries for direct socket system calls on powerpc.
310 * Updated the list of errno constants.
311 * Updated lists of MSG_*, STA_*, and TCP_* constants.
312 * Regenerated the list of ioctl names from Linux 3.3.
313 * Enhanced switching between processes with different personalities.
314 * Enhanced signals reporting by using short signal names.
315 * Made ERESTART* messages more descriptive.
316 * Made parsing of numbers from strings more robust.
317 * Added support for compat_statfs64 and statfs64.f_flags.
318 * Changed read of data blocks to use single process_vm_readv syscall
319 (when available) instead of several PTRACE_PEEKDATA operations.
320 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
321 operation instead of several PTRACE_PEEKUSER operations.
322 * Applied various optimizations to make strace work faster.
325 * Implemented proper handling of real SIGTRAPs on kernels supporting
326 PTRACE_O_TRACESYSGOOD.
327 (Addresses Fedora bug #162774).
328 * Fixed sockaddr_un.sun_path name in decoded output.
329 (Addresses Debian bug #554946).
330 * Fixed to avoid potential core file clobbering on exit.
331 (Addresses Debian bug #656398).
332 * Fixed a typo in documentation.
333 (Addresses Debian bug #653309).
334 * Fixed decoding of timer id returned by timer_create.
335 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
336 * Fixed *at syscalls flags decoding.
337 * Fixed ARM EABI 64-bit syscall's arguments decoding.
338 * Fixed semtimedop decoding on s390.
339 * Fixed osf_sigprocmask decoding on alpha.
340 * Fixed ipc and socket subcall decoding on several architectures.
341 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
342 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
343 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
344 * Corrected io_* syscall entries on ARM.
345 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
346 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
347 * Fixed build when libaio-devel is not available.
348 * Fixed configure checks for PTRACE_* constants.
349 * Fixed compilation warnings remained on several architectures.
352 * Removed all non-Linux code. After years of neglect, that dead code
353 just hampered further strace development.
354 * Linux kernel >= 2.6.18 is recommended. Older versions might still
355 work but they haven't been thoroughly tested with this release.
357 Noteworthy changes in release 4.6 (2011-03-15)
358 ==============================================
360 * Changes in behavior
361 * Print diagnostic information about changes in personality mode to
362 standard error instead of standard output.
365 * Implemented a new method of following clone, fork, and vfork
366 syscalls using the Linux kernel's explicit facilities for tracing
367 creation of threads and child processes.
368 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
369 * Implemented decoding of TLS syscalls on m68k.
370 * Implemented biarch support on powerpc64.
371 * Implemented biarch support for getrlimit() and setrlimit().
372 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
373 * Implemented SOL_SCTP socket options decoding.
374 * Added HDIO_* ioctl names.
375 (Addresses Debian bug #450953).
376 * Added LOOP_* ioctl names.
377 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
378 to match Linux 2.6.37.
379 * Updated the list of IPPROTO_* constants to match netinet/in.h.
380 * Implemented decoding of HDIO_* and BLK* ioctls.
381 * Added MicroBlaze architecture support.
382 * Added new syscall entries to match Linux 2.6.37.
383 * Regenerated list of ioctl names from Linux 2.6.37.
384 * Enhanced signal notification decoding.
385 * Documented -C and -D options.
388 * Fixed fetching syscall arguments on m68k.
389 * Fixed an error when judging whether a process has children.
390 * Fixed get/set_robust_list syscall numbers for powerpc.
391 * Fixed a corner case in printing clone flags.
392 * Fixed cross-compiling issues.
393 * Fixed build issues on powerpc64, SH and SPARC.
394 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
395 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
396 fanotify_init, and fanotify_mark syscalls.
397 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
398 * Fixed biarch support in IO dumping.
399 * Fixed raw exit_group decoding.
400 * Fixed decoding of file descriptors on 64-bit architectures.
401 * Fixed a corner case in waitpid handling.
402 (Addresses Red Hat bug #663547).
403 * Fixed stat64 decoding on mips
404 (Addresses Debian bug #599028).
405 * Fixed misleading italics in the manual page.
406 (Addresses Debian bug #589323).
408 Noteworthy changes in release 4.5.20 (2010-04-13)
409 =================================================
412 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
413 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
414 rt_tgsigqueueinfo, perf_event_open.
415 * Enhanced decoding of recently added syscalls on non-x86 architectures
416 by replacing a bare decoder with elaborate parsers enabled earlier
418 * Implemented -C option to combine regular and -c output.
419 (Addresses Debian bug #466196)
420 * Enhanced decoding of mbind and mremap syscalls.
421 * Enhanced SOL_PACKET socket options decoding.
422 * Regenerated list of ioctl names from linux 2.6.33.
423 * Added TILE architecture support.
426 * Fixed build with Linux kernel headers 2.6.32-rc5+.
427 (Addresses Debian bug #560516 and Fedora bug #539044)
428 * Fixed build on mips.
429 * Fixed handling of Linux systems without struct statfs64.
430 * Fixed reporting signal mask by sigreturn on powerpc.
431 * Fixed potential stack buffer overflow in select decoder.
432 (Addresses Fedora bug #556678)
433 * Corrected msgsnd indirect ipccall decoding.
434 * Corrected decoding of 64bit syscalls.
435 (Addresses Debian bug #570603)
436 * Corrected getsockopt decoding on architectures where
437 sizeof(long) > sizeof(int).
438 (Addresses Debian bug #494844)
439 * Corrected decoding of epoll_pwait.
440 (Addresses Debian bug #513014)
441 * Corrected handling of killed threads.
443 Noteworthy changes in release 4.5.19 (2009-10-21)
444 =================================================
446 * Changes in behavior
447 * When command exits, strace now exits with the same exit status.
448 If command is terminated by a signal, strace terminates itself
449 with the same signal, so that strace can be used as a wrapper
450 process transparent to the invoking parent process.
451 When using -p option, the exit status of strace is zero unless
452 there was an unexpected error in doing the tracing.
453 (Addresses Fedora bug #105371 and Debian bug #37665)
456 * Implemented decoding of new Linux syscalls: accept4, dup3,
457 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
458 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
459 * Implemented decoding of accept4 socketcall.
460 * Enhanced prctl decoding.
461 * Enhanced nanosleep decoding.
462 * Enhanced ptrace decoding.
463 * Enhanced futex decoding.
464 * Enhanced CAP_* decoding.
465 * Enhanced SIOCS* ioctls decoding.
466 * Enhanced fcntl F_* flags decoding.
467 * Enhanced semop/semtimedop decoding.
468 * Updated ARM architecture support.
469 * Added Blackfin architecture support.
470 * Added AVR32 architecture support.
471 * Added CRIS architecture support.
472 * Made strace detect when traced process suddenly disappeared.
475 * Fixed syscall numbers for tee and sync_file_range.
476 (Addresses Debian bug #503124)
477 * Fixed several bugs in strings decoder, including potential heap
479 (Addresses Fedora bugs #470529, #478324 and #511035)
480 * Marked sendfile(2) as a network syscall.
481 (Addresses Debian bug #509499)
482 * Fixed accept(2) decoding.
483 (Addresses Debian bug #507573)
484 * Fixed sigtimedwait(2) decoding.
485 * Fixed build on ARM EABI.
486 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
487 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
488 (Addresses Red Hat bug #471169)
489 * Fixed display of 32-bit argv array on 64-bit architectures.
490 (Addresses Fedora bug #519480)
491 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
492 * Fixed HPPA architecture support.
493 (Addresses Debian bugs #437928 and #546619)
498 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
499 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
504 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
505 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
506 * Improved output for prctl system call on Linux.
507 * Improved support for Linux/ARM.
508 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
513 * Improved output for delete_module, futex, and mbind system calls on Linux.
514 * Improved output for SG_IO ioctls on Linux.
515 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
516 eventfd, getcpu, epoll_pwait.
521 * Several biarch improvements.
522 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
523 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
528 * Accept numeric system calls in -e.
533 * Introduce "-e trace=desc".
538 * Better x86-64 support for IA32 processes.
539 * Update PowerPC system calls.
540 * Better printing for Linux aio system calls.
544 * Quick fix release for build issues.
545 * One fix for Linux/ARM system call table.
550 * Print fault address for SIGSEGV/SIGBUS signals when available.
555 * Improve socket ioctl printing.
556 * Update Linux/IA64 syscall list.
557 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
558 * Improve mount flags printing.
559 * Support symbolic printing of x86_64 arch_prctl parameters.
564 * Update syscall tables for Alpha, ARM, HPPA.
565 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
566 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
567 * Improve ioctl command name matching.
568 * Print RTC_* ioctl structure contents.
569 * Support newer RLIMIT_* values.
570 * Print struct cmsghdr details in sendmsg.
575 * Print attribute values in *xattr system calls on Linux.
576 * Include pread and pwrite calls in -e read and -e write tracing.
577 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
578 * Print clock_t values symbolically in Linux clock_* system calls.
582 * Bug fixes, Linux ioctl updates.
583 * David Miller contributed support for Linux/SPARC64.
591 * Update Linux ioctl lists.
592 * Update PF_* and AF_* value lists.
593 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
598 * On Linux using NPTL threads, -p will now attach to all threads in a process.
599 * Handle new mq_* system calls in Linux 2.6.6 and later.
604 * Report some new VM_* bit values on Linux.
605 * Better output for Linux sched_* system calls.
610 * Display multiple ioctl name matches on Linux.
614 * New port to AMD's x86-64 architecture. One strace binary can
615 handle both new x86-64 and old i386 processes.
616 * Fixed support for LFS64 calls.
617 * New switch -E to add/remove environment variables for the command.
618 * Merged s390/s390x port.
619 * Trace an unbounded number of processes.
620 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
621 * Fixed bugs with attach/detach leaving things stopped.
622 * Fixed traced process seeing ECHILD despite live, traced children
623 in waitpid calls with WNOHANG.
624 * Stuart Menefy contributed a port to Linux/SH.
625 * Stephen Thomas contributed a port to Linux/SH64.
626 * Many other bug fixes.
630 * Fix Linux/ia64 support, looks like someone renamed a few things on us
631 * Fix the ioctl setup for Linux, turned out it did not really work.
632 Improve the ioctl extracter as well so we decode some more ones.
636 * compile fixes for Linux/mips
640 * Linux ia64 and hppa ports added
641 * The usual Linux syscall updates (includes 32bit uid/gid support),
642 * Linux ioctl list updated
643 * Support IPv6 scope ids
644 * FreeBSD/i386 port added
645 * UnixWare and Solaris updates
646 * Better support for tracing multithreaded processes in Linux
650 * Compiles on glibc2.0 systems again
651 * Linux/S390 port added
652 * The usual Linux syscall updates
653 * we can follow fork on arm now
657 * Linux/MIPS port added
658 * Lots of Linux updates again
659 * Improved IPv6 support
665 * Compiles on glibc2.0 systems again
669 * Get stat structure properly on Linux 64bit archs
670 * Personalities work again
671 * Compile correctly on SunOS again
677 * Linux (ultra)sparc fixes
684 * add support for more Linux architectures (powerpc, sparc, arm)
685 * support lots more Linux syscalls
686 * fix signal handling
687 * add IPX and IPIP support
688 * check stray syscall after execv
689 * fix hanging children
691 Changes in version 3.1
692 ======================
695 * Linux 68k is supported
696 * Linux alpha is supported
697 * configure is upgraded to autoconf 2.x
698 * using -f in combination with -e now works correctly
699 * output can be piped to a program
700 * tracing setuid programs works better
701 * it is now reasonable to install strace setuid to root in some circumstances
702 * new useful tracing names like file and process to trace whole
703 classes of system calls, e.g. -efile traces all system calls that
704 take a file name as an argument
705 * IPC calls on SunOS 4.1.x are decoded
706 * Linux program memory is reliably dereferenced
707 * Linux decodes at least the name of all syscalls as of pre2.0.4
708 * various cosmetic changes and bug fixes
710 Changes from versions 2.x to version 3.0
711 ========================================
713 * filename arguments are neither abbreviated nor stringified
714 * string arguments are now true C strings using octal instead of hex by default
715 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
716 * by default the output for multiple processes now goes into one file
717 * all structures, vectors, bitsets, etc. use consistent output formats
718 * the -c option now means count calls, -i does what the old -c used to do
720 New Features in version 3.0
721 ===========================
723 * non-ascii strings can be optionally printed entirely in hex
724 * the output format is readable when mutiple processes are generating output
725 * exit values are printed in an alignment column
726 * is is possible to suppress messages about attaching and detaching
727 * various tracing features can be enabled on a per syscall/signal/desc basis
728 * selective tracing of syscalls
729 * selective printing of syscall structures
730 * selective abbreviation of long structures on a per syscall basis
731 * selective printing of raw syscall arguments and results
732 * selective tracing of signals
733 * selective dumping of all I/O read from file descriptors
734 * selective dumping of all I/O written to file descriptors
735 * optional counting of time, calls, and errors for each syscall
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