1 Noteworthy changes in release ?.?? (????-??-??)
2 ===============================================
5 * Warning is now issued when -F option is used.
6 * Warning is now issued when a tracee with unsupported personality
10 * Implemented decoding of netlink descriptor attributes as file descriptors.
11 * Implemented decoding of hugetlb page size selection flags.
12 * Implemented decoding of BPF_PROG_TEST_RUN, BPF_PROG_GET_NEXT_ID,
13 BPF_MAP_GET_NEXT_ID, BPF_PROG_GET_FD_BY_ID, BPF_MAP_GET_FD_BY_ID,
14 and BPF_OBJ_GET_INFO_BY_FD commands of bpf syscall.
15 * Enhanced decoding of get_thread_area, memfd_create, modify_ldt,
16 perf_event_open, reboot, s390_guarded_storage, s390_pcio_mmio_read,
17 s390_pci_mmio_write, s390_runtime_instr, s390_sthyi, set_thread_area,
19 * Implemented decoding of KVM_* and DM_LIST_DEVICES ioctl commands.
20 * Implemented decoding of riscv_flush_icache syscall.
21 * Enhanced decoding of getsockopt and setsockopt syscalls for SOL_NETLINK
23 * Enhanced decoding of BPF_MAP_CREATE command of bpf syscall.
24 * Print values returned by mq_open syscall and first arguments
25 of mq_getsetattr, mq_notify, mq_timedreceive, and mq_timedsend syscalls
27 * Added decoding of get_tls syscall on arm.
28 * Updated lists of MAP_*, MSG_*, NT_*, and SHM_* constants.
29 * Added manual page for the strace-log-merge command.
30 * Updated lists of ioctl commands from Linux 4.15.
31 * Implemented biarch support for s390x.
32 * Implemented an optional support for symbol demangling in strace -k output
33 (activated by --with-libiberty configure option).
34 * Information about availability of demangling and reliable personality
35 decoding (on architectures with multiple personalities) is now available
37 * Enhanced manual page.
40 * Fixed multi-personality support in cross builds.
41 * Added mq_getsetattr, mq_notify, mq_open, mq_timedreceive, and mq_timedsend
42 syscalls to %desc tracing set.
43 * Fixed path tracing support for mmap syscalls with indirect arguments.
44 * Fixed corner cases in handling of strace -ff -ttt logs by strace-log-merge.
45 * Error counts that exceed one billion are now printed correctly in call
47 * Fixed call summary header for x32 personality.
48 * Changes of tracee personalities are reported more reliably.
49 * Fixed the case when strace attaches to a tracee being inside exec and its
50 first syscall stop is syscall-exit-stop instead of syscall-enter-stop,
51 which messed up all the syscall state tracking.
54 * A C compiler that supports "for" loop initial declarations is now required.
55 * Inability to configure multiple personality support on architectures where
56 multiple personalities are supported leads to configuration failure during
57 build now. Use --enable-mpers=check to revert to the old behaviour.
58 * Build-time requirement for the mpers support has been lowered from gawk 4
61 Noteworthy changes in release 4.20 (2017-11-13)
62 ===============================================
65 * Implemented decoding of NETLINK_NETFILTER netlink message types and flags.
66 * Implemented decoding of SECCOMP_GET_ACTION_AVAIL operation of seccomp
68 * Updated lists of ARPHRD_*, BPF_*, ETH_P_*, LOOP_*, MADV_*,
69 MEMBARRIER_CMD_*, MFD_*, SECCOMP_*, SO_*, SOL_*, TCP_*, and UFFD_FEATURE_*
71 * Added decoding of statx syscall on hppa.
72 * Updated lists of ioctl commands from Linux 4.14.
75 * Fixed powerpc personality support on powerpc64.
77 Noteworthy changes in release 4.19 (2017-09-05)
78 ===============================================
80 * Changes in behaviour
81 * Changed formatting of personality names on tile architecture in order
82 to make it in line with other multi-personality architectures.
83 * Changed field output order in struct v4l2_requestbuffers to improve in/out
85 * Changed handling of multiple signal= specifications in an injection
86 expression: multiple specification now leads to error instead of implicit
87 usage the last specification.
90 * Enhanced decoding of optlen argument of getsockopt syscall.
91 * Enhanced decoding of SO_LINGER option of getsockopt and setsockopt syscalls.
92 * Enhanced decoding of SO_PEERCRED option of getsockopt syscall.
93 * Enhanced decoding of IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP,
94 IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_JOIN_ANYCAST,
95 IPV6_LEAVE_ANYCAST, MCAST_JOIN_GROUP, and MCAST_LEAVE_GROUP options
96 of setsockopt syscall.
97 * Enhanced decoding of KEYCTL_DH_COMPUTE operation of keyctl syscall
98 (KDF parameters decoding).
99 * Implemented decoding of KEYCTL_RESTRICT_KEYRING operation of keyctl syscall.
100 * Enhanced decoding of UFFDIO_API ioctl command.
101 * Enhanced decoding of BPF_PROG_LOAD, BPF_MAP_CREATE, BPF_MAP_LOOKUP_ELEM,
102 and BPF_MAP_GET_NEXT_KEY commands of bpf syscall.
103 * Implemented decoding of linux socket filter programs specified
104 for SO_ATTACH_FILTER and SO_ATTACH_REUSEPORT_CBPF socket options.
105 * Implemented decoding of inet_diag_req_v2, inet_diag_req_compat,
106 packet_diag_msg, and smc_diag_msg netlink attributes of NETLINK_SOCK_DIAG.
107 * Implemented NETLINK_SELINUX protocol specific decoding.
108 * Implemented decoding of netlink message ack flags.
109 * Implemented decoding of nlmsgerr netlink attributes.
110 * Implemented basic protocol specific decoding of NETLINK_CRYPTO.
111 * Implemented decoding of crypto_user_alg netlink attributes
113 * Implemented basic protocol specific decoding of addr, addrlabel, dcb, link,
114 mdb, neigh, neightbl, netconf, nsid, route, rule, tc, and tca messages
116 * Implemented decoding of NETLINK_KOBJECT_UEVENT messages.
117 * Improved handling of unexpected tracees (the ones that cloned with
118 CLONE_PARENT/CLONE_PTRACE or called PTRACE_TRACEME on themselves): they
119 are now PTRACE_DETACH'ed instead of PTRACE_CONT'ed.
120 * Updated lists of BPF_*, KEY_*, RWF_*, SCM_*, SO_*, and *_MAGIC constants.
121 * Added decoding of arch_prctl syscall on x86.
122 * Added decoding of seccomp, bpf, userfaultfd, membarrier, mlock2,
123 copy_file_range, preadv2, pwritev2, and statx on alpha.
124 * Added decoding of statx syscall on microblaze.
125 * Added decoding of s390_guarded_storage syscall on s390.
126 * Updated lists of ioctl commands from Linux 4.13.
127 * Enhanced manual page.
130 * Fixed printing of group_req structure on non-native personalities.
131 * Fixed output formatting of blkpg_ioctl_arg, dm_name_list, and iocb
133 * Fixed formatting of nul-terminated strings which have kernel-imposed size
135 * Fixed printing of paths that hit PATM_MAX limit in order to match kernel's
137 * Fixed build warnings on Android mips64.
138 * Fixed unused function "is_negated_errno" build warning when built
140 * Fixed syscall number and arguments retrieval behaviour on sparc64 and
141 mips o32 after prctl(PR_SET_DUMPABLE, 0) makes PTRACE_PEEKTEXT impossible
142 to use if Linux kernel has commit v4.10-rc1~114^2~2.
143 * Fixed path tracing for execveat, symlink, symlinkat, inotify_add_watch,
144 and inotify_init syscalls.
145 * Fixed personality switch printing on sparc64 and risc-v.
147 Noteworthy changes in release 4.18 (2017-07-05)
148 ===============================================
151 * Implemented decoding of SCM_TIMESTAMP* control messages.
152 * Implemented decoding of netlink NLMSG_DONE messages.
153 * Implemented decoding of netlink generic nlmsg_type and nlmsg_flags.
154 * Implemented decoding of NETLINK_AUDIT, NETLINK_NETFILTER, NETLINK_ROUTE,
155 NETLINK_SELINUX, NETLINK_SOCK_DIAG, and NETLINK_XFRM message types.
156 * Implemented decoding of NETLINK_GENERIC protocol families.
157 * Implemented basic protocol specific decoding of AF_INET, AF_INET6,
158 AF_NETLINK, AF_PACKET, AF_SMC, and AF_UNIX messages of NETLINK_SOCK_DIAG.
159 * Implemented basic decoding of netlink attributes.
160 * Implemented basic protocol specific decoding of AF_INET, AF_NETLINK,
161 AF_PACKET, AF_SMC, and AF_UNIX netlink attributes of NETLINK_SOCK_DIAG.
162 * Implemented decoding of inet_diag_msg, netlink_diag_msg, and unix_diag_msg
163 netlink attributes of NETLINK_SOCK_DIAG.
164 * Updated lists of ARPHRD_*, KEYCTL_*, NDIAG_SHOW_*, RTM_*, SCM_*, SCTP_*,
165 SO_*, V4L2_*, and prctl ARCH_* constants.
166 * Updated lists of ioctl commands from Linux 4.12.
169 * In interactive mode (-I2), those signals that were blocked at startup
170 will remain blocked for the whole period of strace execution.
171 * strace no longer resets SIGCHLD handler in tracees to the default action.
172 * When traced command is terminated by a blocked signal, strace unblocks
173 that signal to ensure its own termination with the same signal.
174 * Fixed corner cases in decoding of old sigaction syscall.
175 * Fixed build with old kernel headers on mips.
176 * Fixed build on aarch64 and tile with glibc >= 2.26.
177 * Fixed build on arc and nios2.
179 Noteworthy changes in release 4.17 (2017-05-24)
180 ===============================================
182 * Changes in command line syntax
183 * Syscall classes specified in -e trace= option now have % prefix (like
184 -e trace=%process). Old style class names without leading % are still
185 supported, but considered deprecated now.
188 * Optimized syscall filtering.
189 * Improved representation of timestamps.
190 * Enhanced decoding of sched_setattr syscall.
191 * Added -e trace=%stat option for tracing variants of stat syscall.
192 * Added -e trace=%lstat option for tracing variants of lstat syscall.
193 * Added -e trace=%fstat option for tracing variants of fstat and fstatat
195 * Added -e trace=%%stat option for tracing syscalls used for querying file
196 status information (stat, lstat, fstat, fstatat, statx, and their
198 * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs
200 * Added -e trace=%fstatfs option for tracing fstatfs, fstatfs64 and fstatvfs
202 * Added -e trace=%%statfs option for tracing syscalls used for querying file
203 system statistics information (statfs-like, fstatfs-like and ustat).
204 * Added -e trace=/regex option for filtering syscalls using regular
206 * Added support for prepending of question mark before syscall qualification
207 in -e trace expressions in order to suppress error in case no syscalls
208 matched the provided qualification.
209 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
210 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
211 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
213 * Implemented decoding of statx syscall.
214 * Implemented decoding of NS_* ioctl commands.
215 * Implemented decoding of the remaining V4L2_BUF_TYPE_* types.
216 * Implemented decoding of VIDIOC_[SG]_TUNER ioctl commands.
217 * Implemented decoding of NLMSG_ERROR netlink messages.
218 * Improved decoding of BPF_PROG_ATTACH command of bpf syscall.
219 * Improved decoding of misplaced parts in DM_* ioctl commands.
220 * Updated lists of ioctl commands from Linux 4.11.
223 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
224 * Fixed the number of arguments and tracing flags of alpha specific syscalls.
225 * Fixed decoding of old sigsuspend syscall on alpha, cris, mips, powerpc,
226 powerpc64, sh, sh64, sparc, and sparc64.
227 * Fixed decoding of sgetmask and ssetmask syscalls on 64-bit architectures.
228 * Fixed decoding of netlink messages received within struct msghdr.
229 * Worked around a bug in miscompiled aarch64 kernels leading to the 3rd
230 argument of sched_getattr syscall being not quite 32-bit.
231 * Fixed corner cases of printing inaccessible times argument of utimes
232 and futimesat syscalls.
234 Noteworthy changes in release 4.16 (2017-02-14)
235 ===============================================
238 * Implemented syscall return value injection (-e inject=SET:retval= option).
239 * Implemented signal injection (-e inject=SET:signal= option).
240 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
241 * Implemented decoding of all SG_* ioctl commands.
242 * Implemented decoding of ustat syscall.
243 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
244 and BPF_PROG_DETACH commands of bpf syscall.
245 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
246 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
248 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
249 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
250 * Updated lists of ioctl commands from Linux 4.10.
251 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
255 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
256 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
257 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
258 and pwritev* syscalls on x32.
259 * Fixed printing of string arguments of getxattr and setxattr syscalls
260 when -s option is used to limit the printed string size.
261 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
263 * Fixed decoding of SG_* and LOOP_* ioctl commands.
264 * Fixed build on mips with musl libc.
265 * Fixed cross-building of ioctlsort.
266 * Applied minor formatting fixes to the manual page.
268 Noteworthy changes in release 4.15 (2016-12-14)
269 ===============================================
271 * Changes in behavior
272 * Time stamps are now printed according to ISO 8601.
273 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
274 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
275 syscalls is now formatted as an array.
278 * Implemented syscall fault injection (-e fault=... option).
279 * Implemented decoding of DM_* ioctl commands.
280 * Implemented decoding of attr parameter of perf_event_open syscall.
281 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
282 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
283 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
285 * Implemented PTRACE_GETREGS API support on m68k.
286 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
287 and V4L2_* constants.
288 * Updated lists of ioctl commands from Linux 4.9.
289 * Added decoding of recently added syscalls on arc, x32, and xtensa.
290 * Enhanced manual page.
293 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
294 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
295 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
296 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
297 setgroups, setns, unshare, and utimes syscalls.
298 * Fixed handling of verbose flag in printing of controls array
299 of struct v4l2_ext_controls.
300 * Fixed omission of field names in the output of capability, sigaction,
301 sigevent, statfs, timespec, timeval, and utimbuf structures.
302 * Fixed printing of unknown syscalls in siginfo structure.
303 * Fixed decoding of ioctl constants on m68k.
304 * Fixed cris architecture support.
305 * Fixed cross build when host compiler does not support the same
306 set of warning flags as the cross compiler.
307 * Fixed build on SLE10 and SLE11.
309 Noteworthy changes in release 4.14 (2016-10-04)
310 ===============================================
312 * Changes in behavior
313 * When using -p option without a command and no processes has been attached,
314 strace exits with exit status 1.
317 * Added printing of the mode argument of open and openat syscalls
318 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
319 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
320 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
321 and aio family syscalls.
322 * Implemented fetching of the 7th subcall argument on mips o32.
323 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
325 * Updated lists of ioctl commands from Linux 4.8.
326 * Added decoding of new syscalls on sh and sh64.
327 * Added RISC-V architecture support.
330 * Marked io_setup and io_destroy as memory mapping related syscalls.
331 * Fixed leakage of placeholder descriptors to tracees.
332 * Fixed printing of mode_t, umode_t, and umask types.
333 * Fixed decoding of iovec arrays without a limit on total data size.
334 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
335 and ipc family syscalls.
336 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
337 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
339 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
340 * Fixed decoding of struct stat64 on sparc64.
341 * Fixed decoding of uid and gid-related syscalls on sparc64.
342 * Fixed decoding of the forth argument of semctl syscall on sparc64.
343 * Fixed values of tty ioctl constants on sparc64.
344 * Fixed sparc personality support on sparc64.
346 Noteworthy changes in release 4.13 (2016-07-26)
347 ===============================================
350 * Implemented a general netlink socket parser.
351 * Enhanced decoding of socket addresses.
352 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
353 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
354 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
355 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
356 and *_MAGIC constants.
357 * Updated lists of ioctl commands from Linux 4.7.
360 * Fixed decoding of pid_t argument of prlimit64 syscall.
361 * Fixed sign extension issues in the parser of struct rusage.
362 * Fixed race condition in decoding of timeout argument of recvmmsg and
363 rt_sigtimedwait syscalls.
364 * Fixed build with fresh linux kernel headers.
366 Noteworthy changes in release 4.12 (2016-05-31)
367 ===============================================
370 * Implemented simultaneous use of -p option and tracing of a command.
371 (addresses Debian bug #549942).
372 * Implemented caching of netlink conversations to reduce amount of time
373 spent in decoding socket details in -yy mode.
374 * Implemented -yy mode decoding of protocol:portid pairs associated with
375 netlink socket descriptors.
376 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
377 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
379 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
380 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
381 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
382 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
383 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
384 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
385 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
386 statfs64, tgkill, waitid, and xattr family syscalls.
387 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
388 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
389 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
390 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
391 * Added decoding of fadvise64 and fadvise64_64 on s390.
392 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
393 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
394 * Updated lists of ioctl commands from Linux 4.6.
397 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
398 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
399 * Fixed decoding of mlock2 syscall on sparc.
400 * Fixed decoding of osf_shmat syscall on alpha.
401 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
402 (addresses Debian bug #485979 and Fedora bug #1298294).
403 * Fixed decoding of preadv syscall in case of short read.
404 * Fixed decoding and dumping of readv syscall in case of short read.
405 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
406 * Fixed decoding of mincore syscall's last argument.
407 * Fixed remaining errors in mapping between syscall numbers and numbers
408 of syscall arguments.
409 * Applied various fixes to strace-graph script.
411 Noteworthy changes in release 4.11 (2015-12-21)
412 ===============================================
414 * Changes in behavior
415 * Some syscalls have different names depending on architecture and
416 personality. In these cases, syscall filtering and printing now
417 consistently uses the names that match corresponding __NR_* kernel
418 macros of the tracee's architecture and personality.
419 * Added strace prefix to all diagnostic messages.
422 * Enhanced and extended test suite.
423 * Implemented reliable tracing of processes whose personality differs
424 from the personality of strace, fixed decoding of 32-bit personality
425 syscalls on 64-bit architectures.
426 * When some data referenced by syscall arguments is irrelevant or cannot
427 be read from tracee's memory, strace now prints its address consistently.
428 * When a syscall is restarted using restart_syscall mechanism, strace now
429 shows the syscall name on architectures that expose this information.
430 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
431 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
432 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
433 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
434 * Optimized decoding of indirect socket syscalls.
435 * Implemented decoding of nanoseconds along with seconds in stat family
436 syscalls (addresses Fedora bug #1251176).
437 * Implemented decoding of struct statfs.f_flags in statfs syscall.
438 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
440 * Implemented decoding of indirect syscall on mips o32.
441 * Implemented decoding of IPPROTO_IP control messages.
442 * Implemented decoding of setsockopt syscall multicast arguments.
443 * Enhanced decoding of struct sigevent.
444 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
445 and v4l2 ioctl syscall arguments.
446 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
447 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
448 sendfile, setsockopt, and shmctl syscalls.
449 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
450 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
451 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
452 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
453 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
454 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
456 * Added Nios II architecture support.
457 * Added new syscall entries to match Linux 4.4.
460 * Fixed potential short read of strings from tracee's memory.
461 * Fixed -qq option in conjunction with -o option.
462 * Fixed filtering of <unavailable> syscalls.
463 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
464 with 64-bit aligned structures.
465 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
466 syscall flags arguments.
467 * Fixed decoding of 4th argument of clock_nanosleep syscall.
468 * Fixed decoding of getpagesize syscall on m68k.
469 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
470 * Fixed decoding of timezone argument of gettimeofday and settimeofday
472 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
474 * Fixed decoding of pipe syscall on alpha and mips.
475 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
476 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
477 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
479 * Fixed decoding of 4th argument of semctl indirect syscall.
480 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
481 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
482 * Fixed decoding of struct dirent on x32.
483 * Fixed decoding of times syscall return value on mips n32 and x32.
484 * Fixed decoding of path argument of umount2 syscall
485 (addresses Debian bug #785050).
486 * Worked around a kernel bug in tracing privileged executables.
487 * Fixed various errors in mapping between syscall numbers and associated
488 information like the number of syscall arguments, the name of syscall,
491 Noteworthy changes in release 4.10 (2015-03-06)
492 ===============================================
495 * Added -yy option to print protocol and address information associated with
497 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
498 recvmsg, sendmmsg, and recvmmsg syscalls.
499 * Implemented full 32-bit decoding of ioctl commands
500 (addresses Debian bug #692913 and Fedora bug #902788).
501 * Implemented PTRACE_GETREGS API support on ia64.
502 * Implemented PTRACE_GETREGS API support on mips.
503 * Implemented PTRACE_GETREGSET API support on s390/s390x.
504 * Implemented decoding of getrandom and seccomp syscalls.
505 * Implemented full decoding of 64-bit capability sets.
506 * Implemented decoding of all prctl commands.
507 * Implemented decoding of parametrized ioctl commands.
508 * Implemented decoding of evdev ioctl commands.
509 * Implemented decoding of v4l ioctl commands.
510 * Implemented decoding of SG_IO v4 ioctl commands.
511 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
512 * Implemented decoding of FALLOC_FL_* fallocate flags.
513 * Implemented decoding of rt_sigreturn signal mask on aarch64,
515 * Enhanced socket decoder to support bluetooth sockets.
516 * Enhanced decoding of unlisted ioctl commands.
517 * Enhanced decoding of getsockopt and setsockopt syscall.
518 * Enhanced decoding of sysinfo syscall.
519 * Enhanced decoding of struct cmsghdr.
520 * Enhanced decoding of wait status.
521 * Enhanced aio support on non-x86 architectures by using external libaio.h.
522 * Added O_TMPFILE to the list of recognized open mode flags.
523 * Updated the list of filesystem type constants that is used in decoding
524 statfs family syscalls.
525 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
527 * Updated lists of signal constants from Linux 3.19.
528 * Updated lists of errno constants from Linux 3.19.
529 * Updated lists of ioctl commands from Linux 3.9.
530 * Added new syscall entries to match Linux 3.19.
533 * Fixed various errors in mapping between syscall numbers and associated
534 information like the number of syscall arguments, the name of syscall,
536 * Fixed quoting issues in printing descriptors, filenames, network interface
537 names, struct utsname members, device/volume names of BLK* ioctl commands.
538 * Fixed uid_t/git_t decoding.
539 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
540 * Fixed potential open flags truncation on some architectures.
541 * Fixed decoding of struct ifreq.ifr_name.
542 * Fixed decoding of SIOCSIFNAME ioctl command.
543 * Fixed decoding of RENAME_* renameat2 flags.
544 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
545 * Fixed decoding of indirect ipc subcalls on some architectures.
546 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
547 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
548 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
549 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
550 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
551 sparc, sparc64, mips, and s390.
552 * Fixed instruction pointer output (-i option) on architectures that support
553 several personalities.
554 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
556 * Fixed build on systems where struct sigaction has no sa_restorer member.
557 * Fixed build with uclibc and musl libc.
560 * Linux kernel >= 2.5.46 is required.
561 Older versions without a decent PTRACE_SETOPTIONS support will not work.
562 * On mips, linux kernel >= 2.6.15 is required.
563 Older versions without a decent PTRACE_GETREGS support will not work.
564 * On s390 and s390x, linux kernel >= 2.6.27 is required.
565 Older versions without a decent PTRACE_GETREGSET support will not work.
567 Noteworthy changes in release 4.9 (2014-08-15)
568 ==============================================
570 * Changes in behavior
571 * Disabled OABI support on ARM EABI systems by default,
572 added --enable-arm-oabi option to enable it at configure time.
575 * Added experimental -k option to print stack trace after each traced syscall.
576 * Added -w option to produce stats on syscall latency.
577 (addresses Debian bug #457497).
578 * Added ARC architecture support.
579 * Added PTRACE_GETREGS API support on PowerPC.
580 * Enhanced Bionic libc and musl libc support.
581 * Enhanced tracing of x86 personality processes on x86_64 and x32.
582 * Enhanced tracing of ARM personality processes on AArch64.
583 * Enhanced 32/64bit personality detection on PowerPC.
584 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
585 renameat2, and request_key syscalls.
586 * Robustified decoding of select, pselect, and io_submit syscalls.
587 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
588 setdomainname, sethostname, setns, and sync_file_range syscalls.
589 * Enhanced decoding of signal bitmasks.
590 * Enhanced decoding of file descriptors.
591 * Enhanced siginfo_t decoding.
592 * Enhanced PF_NETLINK decoding.
593 * Updated CLOCK_* constants
594 (addresses Fedora bug #1088455).
595 * Added new syscall entries to match Linux 3.16.
598 * Added shmat and shmdt to the set of memory mapping related syscalls.
599 * Fixed detaching from stopped processes.
600 * Fixed fanotify_mark decoding on 32bit architectures.
601 * Fixed offset decoding in preadv and pwritev syscalls.
602 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
603 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
604 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
605 (addresses Fedora bug #993384).
606 * Miscellaneous corrections in the manual page.
607 (Addresses Debian bug #725987).
609 Noteworthy changes in release 4.8 (2013-06-03)
610 ==============================================
612 * Changes in behavior
613 * In case of normal strace termination, when the trace output is
614 redirected to a pipe, strace now closes it and waits for the pipe
615 process termination before exit.
618 * Implemented tracing using PTRACE_SEIZE API (when available).
619 * Implemented more reliable PTRACE_GETREGSET-based process personality
620 detection on x86-64 and x32 (when available).
621 * Added -e trace=memory option for tracing memory mapping related syscalls.
622 * Documented -b option.
623 * Allowed exit status messages to be suppressed by giving -q option twice.
624 * Added AArch64 architecture support
625 (addresses Debian bug #693074 and Fedora bug #969858).
626 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
627 * Added tilegx personality support for Tile.
628 * Enhanced support of NOMMU architectures.
629 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
631 * Added new syscall entries to match Linux 3.9.
632 * Regenerated the list of common ioctl names from Linux 3.9.
633 * Updated the list of errno constants.
634 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
635 PTRACE_O_*, and TCP_* constants.
636 * Implemented decoding of UBI ioctls.
637 * Removed redundant "*32" ioctl names.
640 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
641 (addresses Fedora bug #659382).
642 * Fixed kernel release string parsing
643 (addresses Debian bug #702309).
644 * Fixed decoding of *xattr syscalls
645 (addresses Fedora bug #885233).
646 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
647 (addresses Fedora bug #912790).
648 * Fixed tracing forks on SPARC.
649 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
650 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
651 and truncate64 syscalls.
652 * Fixed categories of multiple syscalls on most of supported architectures.
653 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
654 * Fixed decoding of multiple 32-bit personality syscalls on x32.
655 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
656 S390x, and Tile architectures.
657 * Fixed semtimedop decoding on S390x.
658 * Fixed sram_alloc decoding on Blackfin.
659 * Fixed build when process_vm_readv is a stab.
660 * Fixed build with older versions of libaio.h.
662 Noteworthy changes in release 4.7 (2012-05-02)
663 ==============================================
665 * Changes in behavior
666 * strace no longer suspends waitpid until there is a child
667 for waitpid'ing process to collect status from.
668 * strace no longer detaches from a tracee which is supposed
670 * strace now issues a new message: "+++ exited with EXITCODE +++"
671 which shows exact moment strace got exit notification,
672 analogous to existing "+++ killed by SIG +++" message.
675 * Added x32 personality support (x86_64 architecture).
676 * Added -y and -P options to print file descriptor paths and
677 filter by those paths.
678 * Added -I option to control strace interactivity.
679 * Allowed -p option to take comma or whitespace-separated list of PIDs.
680 * Added strace_log_merge script helper to merge timestamped "strace -ff"
682 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
683 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
684 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
685 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
686 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
687 listxattr, setrlimit and swapon syscalls.
688 * Implemented decoding of loop and mtd ioctls.
689 * Added syscall entries for new linux syscalls.
690 * Added syscall entries for direct socket system calls on powerpc.
691 * Updated the list of errno constants.
692 * Updated lists of MSG_*, STA_*, and TCP_* constants.
693 * Regenerated the list of ioctl names from Linux 3.3.
694 * Enhanced switching between processes with different personalities.
695 * Enhanced signals reporting by using short signal names.
696 * Made ERESTART* messages more descriptive.
697 * Made parsing of numbers from strings more robust.
698 * Added support for compat_statfs64 and statfs64.f_flags.
699 * Changed read of data blocks to use single process_vm_readv syscall
700 (when available) instead of several PTRACE_PEEKDATA operations.
701 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
702 operation instead of several PTRACE_PEEKUSER operations.
703 * Applied various optimizations to make strace work faster.
706 * Implemented proper handling of real SIGTRAPs on kernels supporting
707 PTRACE_O_TRACESYSGOOD.
708 (Addresses Fedora bug #162774).
709 * Fixed sockaddr_un.sun_path name in decoded output.
710 (Addresses Debian bug #554946).
711 * Fixed to avoid potential core file clobbering on exit.
712 (Addresses Debian bug #656398).
713 * Fixed a typo in documentation.
714 (Addresses Debian bug #653309).
715 * Fixed decoding of timer id returned by timer_create.
716 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
717 * Fixed *at syscalls flags decoding.
718 * Fixed ARM EABI 64-bit syscall's arguments decoding.
719 * Fixed semtimedop decoding on s390.
720 * Fixed osf_sigprocmask decoding on alpha.
721 * Fixed ipc and socket subcall decoding on several architectures.
722 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
723 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
724 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
725 * Corrected io_* syscall entries on ARM.
726 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
727 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
728 * Fixed build when libaio-devel is not available.
729 * Fixed configure checks for PTRACE_* constants.
730 * Fixed compilation warnings remained on several architectures.
733 * Removed all non-Linux code. After years of neglect, that dead code
734 just hampered further strace development.
735 * Linux kernel >= 2.6.18 is recommended. Older versions might still
736 work but they haven't been thoroughly tested with this release.
738 Noteworthy changes in release 4.6 (2011-03-15)
739 ==============================================
741 * Changes in behavior
742 * Print diagnostic information about changes in personality mode to
743 standard error instead of standard output.
746 * Implemented a new method of following clone, fork, and vfork
747 syscalls using the Linux kernel's explicit facilities for tracing
748 creation of threads and child processes.
749 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
750 * Implemented decoding of TLS syscalls on m68k.
751 * Implemented biarch support on powerpc64.
752 * Implemented biarch support for getrlimit() and setrlimit().
753 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
754 * Implemented SOL_SCTP socket options decoding.
755 * Added HDIO_* ioctl names.
756 (Addresses Debian bug #450953).
757 * Added LOOP_* ioctl names.
758 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
759 to match Linux 2.6.37.
760 * Updated the list of IPPROTO_* constants to match netinet/in.h.
761 * Implemented decoding of HDIO_* and BLK* ioctls.
762 * Added MicroBlaze architecture support.
763 * Added new syscall entries to match Linux 2.6.37.
764 * Regenerated list of ioctl names from Linux 2.6.37.
765 * Enhanced signal notification decoding.
766 * Documented -C and -D options.
769 * Fixed fetching syscall arguments on m68k.
770 * Fixed an error when judging whether a process has children.
771 * Fixed get/set_robust_list syscall numbers for powerpc.
772 * Fixed a corner case in printing clone flags.
773 * Fixed cross-compiling issues.
774 * Fixed build issues on powerpc64, SH and SPARC.
775 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
776 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
777 fanotify_init, and fanotify_mark syscalls.
778 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
779 * Fixed biarch support in IO dumping.
780 * Fixed raw exit_group decoding.
781 * Fixed decoding of file descriptors on 64-bit architectures.
782 * Fixed a corner case in waitpid handling.
783 (Addresses Red Hat bug #663547).
784 * Fixed stat64 decoding on mips
785 (Addresses Debian bug #599028).
786 * Fixed misleading italics in the manual page.
787 (Addresses Debian bug #589323).
789 Noteworthy changes in release 4.5.20 (2010-04-13)
790 =================================================
793 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
794 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
795 rt_tgsigqueueinfo, perf_event_open.
796 * Enhanced decoding of recently added syscalls on non-x86 architectures
797 by replacing a bare decoder with elaborate parsers enabled earlier
799 * Implemented -C option to combine regular and -c output.
800 (Addresses Debian bug #466196)
801 * Enhanced decoding of mbind and mremap syscalls.
802 * Enhanced SOL_PACKET socket options decoding.
803 * Regenerated list of ioctl names from linux 2.6.33.
804 * Added TILE architecture support.
807 * Fixed build with Linux kernel headers 2.6.32-rc5+.
808 (Addresses Debian bug #560516 and Fedora bug #539044)
809 * Fixed build on mips.
810 * Fixed handling of Linux systems without struct statfs64.
811 * Fixed reporting signal mask by sigreturn on powerpc.
812 * Fixed potential stack buffer overflow in select decoder.
813 (Addresses Fedora bug #556678)
814 * Corrected msgsnd indirect ipccall decoding.
815 * Corrected decoding of 64bit syscalls.
816 (Addresses Debian bug #570603)
817 * Corrected getsockopt decoding on architectures where
818 sizeof(long) > sizeof(int).
819 (Addresses Debian bug #494844)
820 * Corrected decoding of epoll_pwait.
821 (Addresses Debian bug #513014)
822 * Corrected handling of killed threads.
824 Noteworthy changes in release 4.5.19 (2009-10-21)
825 =================================================
827 * Changes in behavior
828 * When command exits, strace now exits with the same exit status.
829 If command is terminated by a signal, strace terminates itself
830 with the same signal, so that strace can be used as a wrapper
831 process transparent to the invoking parent process.
832 When using -p option, the exit status of strace is zero unless
833 there was an unexpected error in doing the tracing.
834 (Addresses Fedora bug #105371 and Debian bug #37665)
837 * Implemented decoding of new Linux syscalls: accept4, dup3,
838 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
839 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
840 * Implemented decoding of accept4 socketcall.
841 * Enhanced prctl decoding.
842 * Enhanced nanosleep decoding.
843 * Enhanced ptrace decoding.
844 * Enhanced futex decoding.
845 * Enhanced CAP_* decoding.
846 * Enhanced SIOCS* ioctls decoding.
847 * Enhanced fcntl F_* flags decoding.
848 * Enhanced semop/semtimedop decoding.
849 * Updated ARM architecture support.
850 * Added Blackfin architecture support.
851 * Added AVR32 architecture support.
852 * Added CRIS architecture support.
853 * Made strace detect when traced process suddenly disappeared.
856 * Fixed syscall numbers for tee and sync_file_range.
857 (Addresses Debian bug #503124)
858 * Fixed several bugs in strings decoder, including potential heap
860 (Addresses Fedora bugs #470529, #478324 and #511035)
861 * Marked sendfile(2) as a network syscall.
862 (Addresses Debian bug #509499)
863 * Fixed accept(2) decoding.
864 (Addresses Debian bug #507573)
865 * Fixed sigtimedwait(2) decoding.
866 * Fixed build on ARM EABI.
867 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
868 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
869 (Addresses Red Hat bug #471169)
870 * Fixed display of 32-bit argv array on 64-bit architectures.
871 (Addresses Fedora bug #519480)
872 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
873 * Fixed HPPA architecture support.
874 (Addresses Debian bugs #437928 and #546619)
879 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
880 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
885 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
886 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
887 * Improved output for prctl system call on Linux.
888 * Improved support for Linux/ARM.
889 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
894 * Improved output for delete_module, futex, and mbind system calls on Linux.
895 * Improved output for SG_IO ioctls on Linux.
896 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
897 eventfd, getcpu, epoll_pwait.
902 * Several biarch improvements.
903 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
904 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
909 * Accept numeric system calls in -e.
914 * Introduce "-e trace=desc".
919 * Better x86-64 support for IA32 processes.
920 * Update PowerPC system calls.
921 * Better printing for Linux aio system calls.
925 * Quick fix release for build issues.
926 * One fix for Linux/ARM system call table.
931 * Print fault address for SIGSEGV/SIGBUS signals when available.
936 * Improve socket ioctl printing.
937 * Update Linux/IA64 syscall list.
938 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
939 * Improve mount flags printing.
940 * Support symbolic printing of x86_64 arch_prctl parameters.
945 * Update syscall tables for Alpha, ARM, HPPA.
946 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
947 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
948 * Improve ioctl command name matching.
949 * Print RTC_* ioctl structure contents.
950 * Support newer RLIMIT_* values.
951 * Print struct cmsghdr details in sendmsg.
956 * Print attribute values in *xattr system calls on Linux.
957 * Include pread and pwrite calls in -e read and -e write tracing.
958 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
959 * Print clock_t values symbolically in Linux clock_* system calls.
963 * Bug fixes, Linux ioctl updates.
964 * David Miller contributed support for Linux/SPARC64.
972 * Update Linux ioctl lists.
973 * Update PF_* and AF_* value lists.
974 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
979 * On Linux using NPTL threads, -p will now attach to all threads in a process.
980 * Handle new mq_* system calls in Linux 2.6.6 and later.
985 * Report some new VM_* bit values on Linux.
986 * Better output for Linux sched_* system calls.
991 * Display multiple ioctl name matches on Linux.
995 * New port to AMD's x86-64 architecture. One strace binary can
996 handle both new x86-64 and old i386 processes.
997 * Fixed support for LFS64 calls.
998 * New switch -E to add/remove environment variables for the command.
999 * Merged s390/s390x port.
1000 * Trace an unbounded number of processes.
1001 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
1002 * Fixed bugs with attach/detach leaving things stopped.
1003 * Fixed traced process seeing ECHILD despite live, traced children
1004 in waitpid calls with WNOHANG.
1005 * Stuart Menefy contributed a port to Linux/SH.
1006 * Stephen Thomas contributed a port to Linux/SH64.
1007 * Many other bug fixes.
1011 * Fix Linux/ia64 support, looks like someone renamed a few things on us
1012 * Fix the ioctl setup for Linux, turned out it did not really work.
1013 Improve the ioctl extractor as well so we decode some more ones.
1017 * compile fixes for Linux/mips
1021 * Linux ia64 and hppa ports added
1022 * The usual Linux syscall updates (includes 32bit uid/gid support),
1023 * Linux ioctl list updated
1024 * Support IPv6 scope ids
1025 * FreeBSD/i386 port added
1026 * UnixWare and Solaris updates
1027 * Better support for tracing multithreaded processes in Linux
1031 * Compiles on glibc2.0 systems again
1032 * Linux/S390 port added
1033 * The usual Linux syscall updates
1034 * we can follow fork on arm now
1038 * Linux/MIPS port added
1039 * Lots of Linux updates again
1040 * Improved IPv6 support
1046 * Compiles on glibc2.0 systems again
1050 * Get stat structure properly on Linux 64bit archs
1051 * Personalities work again
1052 * Compile correctly on SunOS again
1058 * Linux (ultra)sparc fixes
1065 * add support for more Linux architectures (powerpc, sparc, arm)
1066 * support lots more Linux syscalls
1067 * fix signal handling
1068 * add IPX and IPIP support
1069 * check stray syscall after execv
1070 * fix hanging children
1072 Changes in version 3.1
1073 ======================
1075 * Irix5 is supported
1076 * Linux 68k is supported
1077 * Linux alpha is supported
1078 * configure is upgraded to autoconf 2.x
1079 * using -f in combination with -e now works correctly
1080 * output can be piped to a program
1081 * tracing setuid programs works better
1082 * it is now reasonable to install strace setuid to root in some circumstances
1083 * new useful tracing names like file and process to trace whole
1084 classes of system calls, e.g. -efile traces all system calls that
1085 take a file name as an argument
1086 * IPC calls on SunOS 4.1.x are decoded
1087 * Linux program memory is reliably dereferenced
1088 * Linux decodes at least the name of all syscalls as of pre2.0.4
1089 * various cosmetic changes and bug fixes
1091 Changes from versions 2.x to version 3.0
1092 ========================================
1094 * filename arguments are neither abbreviated nor stringified
1095 * string arguments are now true C strings using octal instead of hex by default
1096 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
1097 * by default the output for multiple processes now goes into one file
1098 * all structures, vectors, bitsets, etc. use consistent output formats
1099 * the -c option now means count calls, -i does what the old -c used to do
1101 New Features in version 3.0
1102 ===========================
1104 * non-ascii strings can be optionally printed entirely in hex
1105 * the output format is readable when multiple processes are generating output
1106 * exit values are printed in an alignment column
1107 * is is possible to suppress messages about attaching and detaching
1108 * various tracing features can be enabled on a per syscall/signal/desc basis
1109 * selective tracing of syscalls
1110 * selective printing of syscall structures
1111 * selective abbreviation of long structures on a per syscall basis
1112 * selective printing of raw syscall arguments and results
1113 * selective tracing of signals
1114 * selective dumping of all I/O read from file descriptors
1115 * selective dumping of all I/O written to file descriptors
1116 * optional counting of time, calls, and errors for each syscall
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