1 Noteworthy changes in release ?.?? (????-??-??)
2 ===============================================
4 * Changes in infrastructure
5 * The mailing list was moved to strace-devel@lists.strace.io.
8 * Angle brackets are now printed as octal number escape sequences
9 in the output of paths associated with file descriptors.
12 * Implemented delay injection (-e inject=SET:delay_enter= and
13 -e inject=SET:delay_exit= options).
14 * IPv6 addresses shown in socket information in -yy mode are now printed
16 * Enhanced decoding of prctl and ptrace syscalls.
17 * Enhanced decoding of BTRFS_IOC_INO_PATHS and BTRFS_IOC_LOGICAL_INO ioctl
19 * Enhanced NETLINK_ROUTE protocol decoding.
20 * Updated lists of signal codes.
21 * Updated lists of BPF_*, BTN_*, ETH_P_*, INET_DIAG_BC_*, KEY_*, POLL*, RWF_*,
22 SCHED_FLAG_*, and SCTP_* constants.
23 * Implemented block/character device number printing in -yy mode.
24 * Known pixel/SDR format names are printed as comments for pixelformat fields
28 * Fixed build on m68k.
29 * Fixed v4l2 pixelformat decoding on big-endian architectures.
32 Noteworthy changes in release 4.21 (2018-02-13)
33 ===============================================
35 * Changes in behaviour
36 * Warning is now issued when -F option is used.
37 * Warning is now issued when a tracee with unsupported personality
39 * Unknown syscall numbers are now printed in hexadecimal form.
42 * Implemented decoding of netlink descriptor attributes as file descriptors.
43 * Implemented decoding of hugetlb page size selection flags.
44 * Implemented decoding of BPF_PROG_TEST_RUN, BPF_PROG_GET_NEXT_ID,
45 BPF_MAP_GET_NEXT_ID, BPF_PROG_GET_FD_BY_ID, BPF_MAP_GET_FD_BY_ID,
46 and BPF_OBJ_GET_INFO_BY_FD commands of bpf syscall.
47 * Enhanced decoding of get_thread_area, memfd_create, modify_ldt,
48 perf_event_open, reboot, s390_guarded_storage, s390_pcio_mmio_read,
49 s390_pci_mmio_write, s390_runtime_instr, s390_sthyi, set_thread_area,
51 * Implemented decoding of KVM_* and DM_LIST_DEVICES ioctl commands.
52 * Implemented decoding of riscv_flush_icache syscall.
53 * Enhanced decoding of getsockopt and setsockopt syscalls for SOL_NETLINK
55 * Enhanced decoding of BPF_MAP_CREATE command of bpf syscall.
56 * Print values returned by mq_open syscall and first arguments
57 of mq_getsetattr, mq_notify, mq_timedreceive, and mq_timedsend syscalls
59 * Added decoding of get_tls syscall on arm.
60 * Added -e trace=%pure option for tracing system calls with no arguments that
62 * Updated lists of IPV6_*, MAP_*, MEMBARRIER_CMD_*, MSG_*, NT_*, PKEY_*,
63 SHM_*, and TCP_* constants.
64 * Added manual page for the strace-log-merge command.
65 * Updated lists of ioctl commands from Linux 4.15.
66 * Implemented biarch support for s390x.
67 * Implemented an optional support for symbol demangling in strace -k output
68 (activated by --with-libiberty configure option).
69 * Information about availability of demangling and reliable personality
70 decoding (on architectures with multiple personalities) is now available
72 * Added decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls on
73 powerpc and powerpc64.
74 * Enhanced manual page.
77 * Fixed multi-personality support in cross builds.
78 * Added mq_getsetattr, mq_notify, mq_open, mq_timedreceive, and mq_timedsend
79 syscalls to %desc tracing set.
80 * Fixed path tracing support for mmap syscalls with indirect arguments and
81 for old select syscall.
82 * Fixed decoding of arm-specific (__ARM_NR_*) syscalls.
83 * Fixed open mode flags decoding.
84 * Fixed corner cases in handling of strace -ff -ttt logs by strace-log-merge.
85 * Error counts that exceed one billion are now printed correctly in call
87 * Fixed call summary header for x32 personality.
88 * Changes of tracee personalities are reported more reliably.
89 * Fixed the case when strace attaches to a tracee being inside exec and its
90 first syscall stop is syscall-exit-stop instead of syscall-enter-stop,
91 which messed up all the syscall state tracking.
92 * Fixed printing of higher 32 bits of the return value for x32 personality.
95 * A C compiler that supports "for" loop initial declarations is now required.
96 * Inability to configure multiple personality support on architectures where
97 multiple personalities are supported leads to configuration failure during
98 build now. Use --enable-mpers=check to revert to the old behaviour.
99 * Build-time requirement for the mpers support has been lowered from gawk 4
101 * Removed incomplete and non-functional support for the CRIS architecture.
102 * Removed incomplete and unused support for IA-32 mode on the IA-64
105 Noteworthy changes in release 4.20 (2017-11-13)
106 ===============================================
109 * Implemented decoding of NETLINK_NETFILTER netlink message types and flags.
110 * Implemented decoding of SECCOMP_GET_ACTION_AVAIL operation of seccomp
112 * Updated lists of ARPHRD_*, BPF_*, ETH_P_*, LOOP_*, MADV_*,
113 MEMBARRIER_CMD_*, MFD_*, SECCOMP_*, SO_*, SOL_*, TCP_*, and UFFD_FEATURE_*
115 * Added decoding of statx syscall on hppa.
116 * Updated lists of ioctl commands from Linux 4.14.
119 * Fixed powerpc personality support on powerpc64.
121 Noteworthy changes in release 4.19 (2017-09-05)
122 ===============================================
124 * Changes in behaviour
125 * Changed formatting of personality names on tile architecture in order
126 to make it in line with other multi-personality architectures.
127 * Changed field output order in struct v4l2_requestbuffers to improve in/out
129 * Changed handling of multiple signal= specifications in an injection
130 expression: multiple specification now leads to error instead of implicit
131 usage the last specification.
134 * Enhanced decoding of optlen argument of getsockopt syscall.
135 * Enhanced decoding of SO_LINGER option of getsockopt and setsockopt syscalls.
136 * Enhanced decoding of SO_PEERCRED option of getsockopt syscall.
137 * Enhanced decoding of IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP,
138 IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_JOIN_ANYCAST,
139 IPV6_LEAVE_ANYCAST, MCAST_JOIN_GROUP, and MCAST_LEAVE_GROUP options
140 of setsockopt syscall.
141 * Enhanced decoding of KEYCTL_DH_COMPUTE operation of keyctl syscall
142 (KDF parameters decoding).
143 * Implemented decoding of KEYCTL_RESTRICT_KEYRING operation of keyctl syscall.
144 * Enhanced decoding of UFFDIO_API ioctl command.
145 * Enhanced decoding of BPF_PROG_LOAD, BPF_MAP_CREATE, BPF_MAP_LOOKUP_ELEM,
146 and BPF_MAP_GET_NEXT_KEY commands of bpf syscall.
147 * Implemented decoding of linux socket filter programs specified
148 for SO_ATTACH_FILTER and SO_ATTACH_REUSEPORT_CBPF socket options.
149 * Implemented decoding of inet_diag_req_v2, inet_diag_req_compat,
150 packet_diag_msg, and smc_diag_msg netlink attributes of NETLINK_SOCK_DIAG.
151 * Implemented NETLINK_SELINUX protocol specific decoding.
152 * Implemented decoding of netlink message ack flags.
153 * Implemented decoding of nlmsgerr netlink attributes.
154 * Implemented basic protocol specific decoding of NETLINK_CRYPTO.
155 * Implemented decoding of crypto_user_alg netlink attributes
157 * Implemented basic protocol specific decoding of addr, addrlabel, dcb, link,
158 mdb, neigh, neightbl, netconf, nsid, route, rule, tc, and tca messages
160 * Implemented decoding of NETLINK_KOBJECT_UEVENT messages.
161 * Improved handling of unexpected tracees (the ones that cloned with
162 CLONE_PARENT/CLONE_PTRACE or called PTRACE_TRACEME on themselves): they
163 are now PTRACE_DETACH'ed instead of PTRACE_CONT'ed.
164 * Updated lists of BPF_*, KEY_*, RWF_*, SCM_*, SO_*, and *_MAGIC constants.
165 * Added decoding of arch_prctl syscall on x86.
166 * Added decoding of seccomp, bpf, userfaultfd, membarrier, mlock2,
167 copy_file_range, preadv2, pwritev2, and statx on alpha.
168 * Added decoding of statx syscall on microblaze.
169 * Added decoding of s390_guarded_storage syscall on s390.
170 * Updated lists of ioctl commands from Linux 4.13.
171 * Enhanced manual page.
174 * Fixed printing of group_req structure on non-native personalities.
175 * Fixed output formatting of blkpg_ioctl_arg, dm_name_list, and iocb
177 * Fixed formatting of nul-terminated strings which have kernel-imposed size
179 * Fixed printing of paths that hit PATM_MAX limit in order to match kernel's
181 * Fixed build warnings on Android mips64.
182 * Fixed unused function "is_negated_errno" build warning when built
184 * Fixed syscall number and arguments retrieval behaviour on sparc64 and
185 mips o32 after prctl(PR_SET_DUMPABLE, 0) makes PTRACE_PEEKTEXT impossible
186 to use if Linux kernel has commit v4.10-rc1~114^2~2.
187 * Fixed path tracing for execveat, symlink, symlinkat, inotify_add_watch,
188 and inotify_init syscalls.
189 * Fixed personality switch printing on sparc64 and risc-v.
191 Noteworthy changes in release 4.18 (2017-07-05)
192 ===============================================
195 * Implemented decoding of SCM_TIMESTAMP* control messages.
196 * Implemented decoding of netlink NLMSG_DONE messages.
197 * Implemented decoding of netlink generic nlmsg_type and nlmsg_flags.
198 * Implemented decoding of NETLINK_AUDIT, NETLINK_NETFILTER, NETLINK_ROUTE,
199 NETLINK_SELINUX, NETLINK_SOCK_DIAG, and NETLINK_XFRM message types.
200 * Implemented decoding of NETLINK_GENERIC protocol families.
201 * Implemented basic protocol specific decoding of AF_INET, AF_INET6,
202 AF_NETLINK, AF_PACKET, AF_SMC, and AF_UNIX messages of NETLINK_SOCK_DIAG.
203 * Implemented basic decoding of netlink attributes.
204 * Implemented basic protocol specific decoding of AF_INET, AF_NETLINK,
205 AF_PACKET, AF_SMC, and AF_UNIX netlink attributes of NETLINK_SOCK_DIAG.
206 * Implemented decoding of inet_diag_msg, netlink_diag_msg, and unix_diag_msg
207 netlink attributes of NETLINK_SOCK_DIAG.
208 * Updated lists of ARPHRD_*, KEYCTL_*, NDIAG_SHOW_*, RTM_*, SCM_*, SCTP_*,
209 SO_*, V4L2_*, and prctl ARCH_* constants.
210 * Updated lists of ioctl commands from Linux 4.12.
213 * In interactive mode (-I2), those signals that were blocked at startup
214 will remain blocked for the whole period of strace execution.
215 * strace no longer resets SIGCHLD handler in tracees to the default action.
216 * When traced command is terminated by a blocked signal, strace unblocks
217 that signal to ensure its own termination with the same signal.
218 * Fixed corner cases in decoding of old sigaction syscall.
219 * Fixed build with old kernel headers on mips.
220 * Fixed build on aarch64 and tile with glibc >= 2.26.
221 * Fixed build on arc and nios2.
223 Noteworthy changes in release 4.17 (2017-05-24)
224 ===============================================
226 * Changes in command line syntax
227 * Syscall classes specified in -e trace= option now have % prefix (like
228 -e trace=%process). Old style class names without leading % are still
229 supported, but considered deprecated now.
232 * Optimized syscall filtering.
233 * Improved representation of timestamps.
234 * Enhanced decoding of sched_setattr syscall.
235 * Added -e trace=%stat option for tracing variants of stat syscall.
236 * Added -e trace=%lstat option for tracing variants of lstat syscall.
237 * Added -e trace=%fstat option for tracing variants of fstat and fstatat
239 * Added -e trace=%%stat option for tracing syscalls used for querying file
240 status information (stat, lstat, fstat, fstatat, statx, and their
242 * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs
244 * Added -e trace=%fstatfs option for tracing fstatfs, fstatfs64 and fstatvfs
246 * Added -e trace=%%statfs option for tracing syscalls used for querying file
247 system statistics information (statfs-like, fstatfs-like and ustat).
248 * Added -e trace=/regex option for filtering syscalls using regular
250 * Added support for prepending of question mark before syscall qualification
251 in -e trace expressions in order to suppress error in case no syscalls
252 matched the provided qualification.
253 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
254 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
255 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
257 * Implemented decoding of statx syscall.
258 * Implemented decoding of NS_* ioctl commands.
259 * Implemented decoding of the remaining V4L2_BUF_TYPE_* types.
260 * Implemented decoding of VIDIOC_[SG]_TUNER ioctl commands.
261 * Implemented decoding of NLMSG_ERROR netlink messages.
262 * Improved decoding of BPF_PROG_ATTACH command of bpf syscall.
263 * Improved decoding of misplaced parts in DM_* ioctl commands.
264 * Updated lists of ioctl commands from Linux 4.11.
267 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
268 * Fixed the number of arguments and tracing flags of alpha specific syscalls.
269 * Fixed decoding of old sigsuspend syscall on alpha, cris, mips, powerpc,
270 powerpc64, sh, sh64, sparc, and sparc64.
271 * Fixed decoding of sgetmask and ssetmask syscalls on 64-bit architectures.
272 * Fixed decoding of netlink messages received within struct msghdr.
273 * Worked around a bug in miscompiled aarch64 kernels leading to the 3rd
274 argument of sched_getattr syscall being not quite 32-bit.
275 * Fixed corner cases of printing inaccessible times argument of utimes
276 and futimesat syscalls.
278 Noteworthy changes in release 4.16 (2017-02-14)
279 ===============================================
282 * Implemented syscall return value injection (-e inject=SET:retval= option).
283 * Implemented signal injection (-e inject=SET:signal= option).
284 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
285 * Implemented decoding of all SG_* ioctl commands.
286 * Implemented decoding of ustat syscall.
287 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
288 and BPF_PROG_DETACH commands of bpf syscall.
289 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
290 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
292 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
293 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
294 * Updated lists of ioctl commands from Linux 4.10.
295 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
299 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
300 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
301 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
302 and pwritev* syscalls on x32.
303 * Fixed printing of string arguments of getxattr and setxattr syscalls
304 when -s option is used to limit the printed string size.
305 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
307 * Fixed decoding of SG_* and LOOP_* ioctl commands.
308 * Fixed build on mips with musl libc.
309 * Fixed cross-building of ioctlsort.
310 * Applied minor formatting fixes to the manual page.
312 Noteworthy changes in release 4.15 (2016-12-14)
313 ===============================================
315 * Changes in behavior
316 * Time stamps are now printed according to ISO 8601.
317 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
318 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
319 syscalls is now formatted as an array.
322 * Implemented syscall fault injection (-e fault=... option).
323 * Implemented decoding of DM_* ioctl commands.
324 * Implemented decoding of attr parameter of perf_event_open syscall.
325 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
326 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
327 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
329 * Implemented PTRACE_GETREGS API support on m68k.
330 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
331 and V4L2_* constants.
332 * Updated lists of ioctl commands from Linux 4.9.
333 * Added decoding of recently added syscalls on arc, x32, and xtensa.
334 * Enhanced manual page.
337 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
338 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
339 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
340 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
341 setgroups, setns, unshare, and utimes syscalls.
342 * Fixed handling of verbose flag in printing of controls array
343 of struct v4l2_ext_controls.
344 * Fixed omission of field names in the output of capability, sigaction,
345 sigevent, statfs, timespec, timeval, and utimbuf structures.
346 * Fixed printing of unknown syscalls in siginfo structure.
347 * Fixed decoding of ioctl constants on m68k.
348 * Fixed cris architecture support.
349 * Fixed cross build when host compiler does not support the same
350 set of warning flags as the cross compiler.
351 * Fixed build on SLE10 and SLE11.
353 Noteworthy changes in release 4.14 (2016-10-04)
354 ===============================================
356 * Changes in behavior
357 * When using -p option without a command and no processes has been attached,
358 strace exits with exit status 1.
361 * Added printing of the mode argument of open and openat syscalls
362 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
363 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
364 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
365 and aio family syscalls.
366 * Implemented fetching of the 7th subcall argument on mips o32.
367 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
369 * Updated lists of ioctl commands from Linux 4.8.
370 * Added decoding of new syscalls on sh and sh64.
371 * Added RISC-V architecture support.
374 * Marked io_setup and io_destroy as memory mapping related syscalls.
375 * Fixed leakage of placeholder descriptors to tracees.
376 * Fixed printing of mode_t, umode_t, and umask types.
377 * Fixed decoding of iovec arrays without a limit on total data size.
378 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
379 and ipc family syscalls.
380 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
381 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
383 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
384 * Fixed decoding of struct stat64 on sparc64.
385 * Fixed decoding of uid and gid-related syscalls on sparc64.
386 * Fixed decoding of the forth argument of semctl syscall on sparc64.
387 * Fixed values of tty ioctl constants on sparc64.
388 * Fixed sparc personality support on sparc64.
390 Noteworthy changes in release 4.13 (2016-07-26)
391 ===============================================
394 * Implemented a general netlink socket parser.
395 * Enhanced decoding of socket addresses.
396 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
397 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
398 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
399 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
400 and *_MAGIC constants.
401 * Updated lists of ioctl commands from Linux 4.7.
404 * Fixed decoding of pid_t argument of prlimit64 syscall.
405 * Fixed sign extension issues in the parser of struct rusage.
406 * Fixed race condition in decoding of timeout argument of recvmmsg and
407 rt_sigtimedwait syscalls.
408 * Fixed build with fresh linux kernel headers.
410 Noteworthy changes in release 4.12 (2016-05-31)
411 ===============================================
414 * Implemented simultaneous use of -p option and tracing of a command.
415 (addresses Debian bug #549942).
416 * Implemented caching of netlink conversations to reduce amount of time
417 spent in decoding socket details in -yy mode.
418 * Implemented -yy mode decoding of protocol:portid pairs associated with
419 netlink socket descriptors.
420 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
421 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
423 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
424 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
425 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
426 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
427 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
428 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
429 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
430 statfs64, tgkill, waitid, and xattr family syscalls.
431 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
432 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
433 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
434 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
435 * Added decoding of fadvise64 and fadvise64_64 on s390.
436 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
437 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
438 * Updated lists of ioctl commands from Linux 4.6.
441 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
442 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
443 * Fixed decoding of mlock2 syscall on sparc.
444 * Fixed decoding of osf_shmat syscall on alpha.
445 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
446 (addresses Debian bug #485979 and Fedora bug #1298294).
447 * Fixed decoding of preadv syscall in case of short read.
448 * Fixed decoding and dumping of readv syscall in case of short read.
449 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
450 * Fixed decoding of mincore syscall's last argument.
451 * Fixed remaining errors in mapping between syscall numbers and numbers
452 of syscall arguments.
453 * Applied various fixes to strace-graph script.
455 Noteworthy changes in release 4.11 (2015-12-21)
456 ===============================================
458 * Changes in behavior
459 * Some syscalls have different names depending on architecture and
460 personality. In these cases, syscall filtering and printing now
461 consistently uses the names that match corresponding __NR_* kernel
462 macros of the tracee's architecture and personality.
463 * Added strace prefix to all diagnostic messages.
466 * Enhanced and extended test suite.
467 * Implemented reliable tracing of processes whose personality differs
468 from the personality of strace, fixed decoding of 32-bit personality
469 syscalls on 64-bit architectures.
470 * When some data referenced by syscall arguments is irrelevant or cannot
471 be read from tracee's memory, strace now prints its address consistently.
472 * When a syscall is restarted using restart_syscall mechanism, strace now
473 shows the syscall name on architectures that expose this information.
474 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
475 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
476 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
477 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
478 * Optimized decoding of indirect socket syscalls.
479 * Implemented decoding of nanoseconds along with seconds in stat family
480 syscalls (addresses Fedora bug #1251176).
481 * Implemented decoding of struct statfs.f_flags in statfs syscall.
482 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
484 * Implemented decoding of indirect syscall on mips o32.
485 * Implemented decoding of IPPROTO_IP control messages.
486 * Implemented decoding of setsockopt syscall multicast arguments.
487 * Enhanced decoding of struct sigevent.
488 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
489 and v4l2 ioctl syscall arguments.
490 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
491 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
492 sendfile, setsockopt, and shmctl syscalls.
493 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
494 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
495 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
496 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
497 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
498 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
500 * Added Nios II architecture support.
501 * Added new syscall entries to match Linux 4.4.
504 * Fixed potential short read of strings from tracee's memory.
505 * Fixed -qq option in conjunction with -o option.
506 * Fixed filtering of <unavailable> syscalls.
507 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
508 with 64-bit aligned structures.
509 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
510 syscall flags arguments.
511 * Fixed decoding of 4th argument of clock_nanosleep syscall.
512 * Fixed decoding of getpagesize syscall on m68k.
513 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
514 * Fixed decoding of timezone argument of gettimeofday and settimeofday
516 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
518 * Fixed decoding of pipe syscall on alpha and mips.
519 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
520 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
521 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
523 * Fixed decoding of 4th argument of semctl indirect syscall.
524 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
525 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
526 * Fixed decoding of struct dirent on x32.
527 * Fixed decoding of times syscall return value on mips n32 and x32.
528 * Fixed decoding of path argument of umount2 syscall
529 (addresses Debian bug #785050).
530 * Worked around a kernel bug in tracing privileged executables.
531 * Fixed various errors in mapping between syscall numbers and associated
532 information like the number of syscall arguments, the name of syscall,
535 Noteworthy changes in release 4.10 (2015-03-06)
536 ===============================================
539 * Added -yy option to print protocol and address information associated with
541 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
542 recvmsg, sendmmsg, and recvmmsg syscalls.
543 * Implemented full 32-bit decoding of ioctl commands
544 (addresses Debian bug #692913 and Fedora bug #902788).
545 * Implemented PTRACE_GETREGS API support on ia64.
546 * Implemented PTRACE_GETREGS API support on mips.
547 * Implemented PTRACE_GETREGSET API support on s390/s390x.
548 * Implemented decoding of getrandom and seccomp syscalls.
549 * Implemented full decoding of 64-bit capability sets.
550 * Implemented decoding of all prctl commands.
551 * Implemented decoding of parametrized ioctl commands.
552 * Implemented decoding of evdev ioctl commands.
553 * Implemented decoding of v4l ioctl commands.
554 * Implemented decoding of SG_IO v4 ioctl commands.
555 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
556 * Implemented decoding of FALLOC_FL_* fallocate flags.
557 * Implemented decoding of rt_sigreturn signal mask on aarch64,
559 * Enhanced socket decoder to support bluetooth sockets.
560 * Enhanced decoding of unlisted ioctl commands.
561 * Enhanced decoding of getsockopt and setsockopt syscall.
562 * Enhanced decoding of sysinfo syscall.
563 * Enhanced decoding of struct cmsghdr.
564 * Enhanced decoding of wait status.
565 * Enhanced aio support on non-x86 architectures by using external libaio.h.
566 * Added O_TMPFILE to the list of recognized open mode flags.
567 * Updated the list of filesystem type constants that is used in decoding
568 statfs family syscalls.
569 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
571 * Updated lists of signal constants from Linux 3.19.
572 * Updated lists of errno constants from Linux 3.19.
573 * Updated lists of ioctl commands from Linux 3.9.
574 * Added new syscall entries to match Linux 3.19.
577 * Fixed various errors in mapping between syscall numbers and associated
578 information like the number of syscall arguments, the name of syscall,
580 * Fixed quoting issues in printing descriptors, filenames, network interface
581 names, struct utsname members, device/volume names of BLK* ioctl commands.
582 * Fixed uid_t/git_t decoding.
583 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
584 * Fixed potential open flags truncation on some architectures.
585 * Fixed decoding of struct ifreq.ifr_name.
586 * Fixed decoding of SIOCSIFNAME ioctl command.
587 * Fixed decoding of RENAME_* renameat2 flags.
588 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
589 * Fixed decoding of indirect ipc subcalls on some architectures.
590 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
591 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
592 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
593 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
594 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
595 sparc, sparc64, mips, and s390.
596 * Fixed instruction pointer output (-i option) on architectures that support
597 several personalities.
598 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
600 * Fixed build on systems where struct sigaction has no sa_restorer member.
601 * Fixed build with uclibc and musl libc.
604 * Linux kernel >= 2.5.46 is required.
605 Older versions without a decent PTRACE_SETOPTIONS support will not work.
606 * On mips, linux kernel >= 2.6.15 is required.
607 Older versions without a decent PTRACE_GETREGS support will not work.
608 * On s390 and s390x, linux kernel >= 2.6.27 is required.
609 Older versions without a decent PTRACE_GETREGSET support will not work.
611 Noteworthy changes in release 4.9 (2014-08-15)
612 ==============================================
614 * Changes in behavior
615 * Disabled OABI support on ARM EABI systems by default,
616 added --enable-arm-oabi option to enable it at configure time.
619 * Added experimental -k option to print stack trace after each traced syscall.
620 * Added -w option to produce stats on syscall latency.
621 (addresses Debian bug #457497).
622 * Added ARC architecture support.
623 * Added PTRACE_GETREGS API support on PowerPC.
624 * Enhanced Bionic libc and musl libc support.
625 * Enhanced tracing of x86 personality processes on x86_64 and x32.
626 * Enhanced tracing of ARM personality processes on AArch64.
627 * Enhanced 32/64bit personality detection on PowerPC.
628 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
629 renameat2, and request_key syscalls.
630 * Robustified decoding of select, pselect, and io_submit syscalls.
631 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
632 setdomainname, sethostname, setns, and sync_file_range syscalls.
633 * Enhanced decoding of signal bitmasks.
634 * Enhanced decoding of file descriptors.
635 * Enhanced siginfo_t decoding.
636 * Enhanced PF_NETLINK decoding.
637 * Updated CLOCK_* constants
638 (addresses Fedora bug #1088455).
639 * Added new syscall entries to match Linux 3.16.
642 * Added shmat and shmdt to the set of memory mapping related syscalls.
643 * Fixed detaching from stopped processes.
644 * Fixed fanotify_mark decoding on 32bit architectures.
645 * Fixed offset decoding in preadv and pwritev syscalls.
646 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
647 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
648 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
649 (addresses Fedora bug #993384).
650 * Miscellaneous corrections in the manual page.
651 (Addresses Debian bug #725987).
653 Noteworthy changes in release 4.8 (2013-06-03)
654 ==============================================
656 * Changes in behavior
657 * In case of normal strace termination, when the trace output is
658 redirected to a pipe, strace now closes it and waits for the pipe
659 process termination before exit.
662 * Implemented tracing using PTRACE_SEIZE API (when available).
663 * Implemented more reliable PTRACE_GETREGSET-based process personality
664 detection on x86-64 and x32 (when available).
665 * Added -e trace=memory option for tracing memory mapping related syscalls.
666 * Documented -b option.
667 * Allowed exit status messages to be suppressed by giving -q option twice.
668 * Added AArch64 architecture support
669 (addresses Debian bug #693074 and Fedora bug #969858).
670 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
671 * Added tilegx personality support for Tile.
672 * Enhanced support of NOMMU architectures.
673 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
675 * Added new syscall entries to match Linux 3.9.
676 * Regenerated the list of common ioctl names from Linux 3.9.
677 * Updated the list of errno constants.
678 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
679 PTRACE_O_*, and TCP_* constants.
680 * Implemented decoding of UBI ioctls.
681 * Removed redundant "*32" ioctl names.
684 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
685 (addresses Fedora bug #659382).
686 * Fixed kernel release string parsing
687 (addresses Debian bug #702309).
688 * Fixed decoding of *xattr syscalls
689 (addresses Fedora bug #885233).
690 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
691 (addresses Fedora bug #912790).
692 * Fixed tracing forks on SPARC.
693 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
694 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
695 and truncate64 syscalls.
696 * Fixed categories of multiple syscalls on most of supported architectures.
697 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
698 * Fixed decoding of multiple 32-bit personality syscalls on x32.
699 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
700 S390x, and Tile architectures.
701 * Fixed semtimedop decoding on S390x.
702 * Fixed sram_alloc decoding on Blackfin.
703 * Fixed build when process_vm_readv is a stab.
704 * Fixed build with older versions of libaio.h.
706 Noteworthy changes in release 4.7 (2012-05-02)
707 ==============================================
709 * Changes in behavior
710 * strace no longer suspends waitpid until there is a child
711 for waitpid'ing process to collect status from.
712 * strace no longer detaches from a tracee which is supposed
714 * strace now issues a new message: "+++ exited with EXITCODE +++"
715 which shows exact moment strace got exit notification,
716 analogous to existing "+++ killed by SIG +++" message.
719 * Added x32 personality support (x86_64 architecture).
720 * Added -y and -P options to print file descriptor paths and
721 filter by those paths.
722 * Added -I option to control strace interactivity.
723 * Allowed -p option to take comma or whitespace-separated list of PIDs.
724 * Added strace_log_merge script helper to merge timestamped "strace -ff"
726 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
727 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
728 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
729 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
730 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
731 listxattr, setrlimit and swapon syscalls.
732 * Implemented decoding of loop and mtd ioctls.
733 * Added syscall entries for new linux syscalls.
734 * Added syscall entries for direct socket system calls on powerpc.
735 * Updated the list of errno constants.
736 * Updated lists of MSG_*, STA_*, and TCP_* constants.
737 * Regenerated the list of ioctl names from Linux 3.3.
738 * Enhanced switching between processes with different personalities.
739 * Enhanced signals reporting by using short signal names.
740 * Made ERESTART* messages more descriptive.
741 * Made parsing of numbers from strings more robust.
742 * Added support for compat_statfs64 and statfs64.f_flags.
743 * Changed read of data blocks to use single process_vm_readv syscall
744 (when available) instead of several PTRACE_PEEKDATA operations.
745 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
746 operation instead of several PTRACE_PEEKUSER operations.
747 * Applied various optimizations to make strace work faster.
750 * Implemented proper handling of real SIGTRAPs on kernels supporting
751 PTRACE_O_TRACESYSGOOD.
752 (Addresses Fedora bug #162774).
753 * Fixed sockaddr_un.sun_path name in decoded output.
754 (Addresses Debian bug #554946).
755 * Fixed to avoid potential core file clobbering on exit.
756 (Addresses Debian bug #656398).
757 * Fixed a typo in documentation.
758 (Addresses Debian bug #653309).
759 * Fixed decoding of timer id returned by timer_create.
760 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
761 * Fixed *at syscalls flags decoding.
762 * Fixed ARM EABI 64-bit syscall's arguments decoding.
763 * Fixed semtimedop decoding on s390.
764 * Fixed osf_sigprocmask decoding on alpha.
765 * Fixed ipc and socket subcall decoding on several architectures.
766 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
767 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
768 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
769 * Corrected io_* syscall entries on ARM.
770 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
771 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
772 * Fixed build when libaio-devel is not available.
773 * Fixed configure checks for PTRACE_* constants.
774 * Fixed compilation warnings remained on several architectures.
777 * Removed all non-Linux code. After years of neglect, that dead code
778 just hampered further strace development.
779 * Linux kernel >= 2.6.18 is recommended. Older versions might still
780 work but they haven't been thoroughly tested with this release.
782 Noteworthy changes in release 4.6 (2011-03-15)
783 ==============================================
785 * Changes in behavior
786 * Print diagnostic information about changes in personality mode to
787 standard error instead of standard output.
790 * Implemented a new method of following clone, fork, and vfork
791 syscalls using the Linux kernel's explicit facilities for tracing
792 creation of threads and child processes.
793 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
794 * Implemented decoding of TLS syscalls on m68k.
795 * Implemented biarch support on powerpc64.
796 * Implemented biarch support for getrlimit() and setrlimit().
797 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
798 * Implemented SOL_SCTP socket options decoding.
799 * Added HDIO_* ioctl names.
800 (Addresses Debian bug #450953).
801 * Added LOOP_* ioctl names.
802 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
803 to match Linux 2.6.37.
804 * Updated the list of IPPROTO_* constants to match netinet/in.h.
805 * Implemented decoding of HDIO_* and BLK* ioctls.
806 * Added MicroBlaze architecture support.
807 * Added new syscall entries to match Linux 2.6.37.
808 * Regenerated list of ioctl names from Linux 2.6.37.
809 * Enhanced signal notification decoding.
810 * Documented -C and -D options.
813 * Fixed fetching syscall arguments on m68k.
814 * Fixed an error when judging whether a process has children.
815 * Fixed get/set_robust_list syscall numbers for powerpc.
816 * Fixed a corner case in printing clone flags.
817 * Fixed cross-compiling issues.
818 * Fixed build issues on powerpc64, SH and SPARC.
819 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
820 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
821 fanotify_init, and fanotify_mark syscalls.
822 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
823 * Fixed biarch support in IO dumping.
824 * Fixed raw exit_group decoding.
825 * Fixed decoding of file descriptors on 64-bit architectures.
826 * Fixed a corner case in waitpid handling.
827 (Addresses Red Hat bug #663547).
828 * Fixed stat64 decoding on mips
829 (Addresses Debian bug #599028).
830 * Fixed misleading italics in the manual page.
831 (Addresses Debian bug #589323).
833 Noteworthy changes in release 4.5.20 (2010-04-13)
834 =================================================
837 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
838 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
839 rt_tgsigqueueinfo, perf_event_open.
840 * Enhanced decoding of recently added syscalls on non-x86 architectures
841 by replacing a bare decoder with elaborate parsers enabled earlier
843 * Implemented -C option to combine regular and -c output.
844 (Addresses Debian bug #466196)
845 * Enhanced decoding of mbind and mremap syscalls.
846 * Enhanced SOL_PACKET socket options decoding.
847 * Regenerated list of ioctl names from linux 2.6.33.
848 * Added TILE architecture support.
851 * Fixed build with Linux kernel headers 2.6.32-rc5+.
852 (Addresses Debian bug #560516 and Fedora bug #539044)
853 * Fixed build on mips.
854 * Fixed handling of Linux systems without struct statfs64.
855 * Fixed reporting signal mask by sigreturn on powerpc.
856 * Fixed potential stack buffer overflow in select decoder.
857 (Addresses Fedora bug #556678)
858 * Corrected msgsnd indirect ipccall decoding.
859 * Corrected decoding of 64bit syscalls.
860 (Addresses Debian bug #570603)
861 * Corrected getsockopt decoding on architectures where
862 sizeof(long) > sizeof(int).
863 (Addresses Debian bug #494844)
864 * Corrected decoding of epoll_pwait.
865 (Addresses Debian bug #513014)
866 * Corrected handling of killed threads.
868 Noteworthy changes in release 4.5.19 (2009-10-21)
869 =================================================
871 * Changes in behavior
872 * When command exits, strace now exits with the same exit status.
873 If command is terminated by a signal, strace terminates itself
874 with the same signal, so that strace can be used as a wrapper
875 process transparent to the invoking parent process.
876 When using -p option, the exit status of strace is zero unless
877 there was an unexpected error in doing the tracing.
878 (Addresses Fedora bug #105371 and Debian bug #37665)
881 * Implemented decoding of new Linux syscalls: accept4, dup3,
882 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
883 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
884 * Implemented decoding of accept4 socketcall.
885 * Enhanced prctl decoding.
886 * Enhanced nanosleep decoding.
887 * Enhanced ptrace decoding.
888 * Enhanced futex decoding.
889 * Enhanced CAP_* decoding.
890 * Enhanced SIOCS* ioctls decoding.
891 * Enhanced fcntl F_* flags decoding.
892 * Enhanced semop/semtimedop decoding.
893 * Updated ARM architecture support.
894 * Added Blackfin architecture support.
895 * Added AVR32 architecture support.
896 * Added CRIS architecture support.
897 * Made strace detect when traced process suddenly disappeared.
900 * Fixed syscall numbers for tee and sync_file_range.
901 (Addresses Debian bug #503124)
902 * Fixed several bugs in strings decoder, including potential heap
904 (Addresses Fedora bugs #470529, #478324 and #511035)
905 * Marked sendfile(2) as a network syscall.
906 (Addresses Debian bug #509499)
907 * Fixed accept(2) decoding.
908 (Addresses Debian bug #507573)
909 * Fixed sigtimedwait(2) decoding.
910 * Fixed build on ARM EABI.
911 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
912 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
913 (Addresses Red Hat bug #471169)
914 * Fixed display of 32-bit argv array on 64-bit architectures.
915 (Addresses Fedora bug #519480)
916 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
917 * Fixed HPPA architecture support.
918 (Addresses Debian bugs #437928 and #546619)
923 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
924 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
929 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
930 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
931 * Improved output for prctl system call on Linux.
932 * Improved support for Linux/ARM.
933 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
938 * Improved output for delete_module, futex, and mbind system calls on Linux.
939 * Improved output for SG_IO ioctls on Linux.
940 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
941 eventfd, getcpu, epoll_pwait.
946 * Several biarch improvements.
947 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
948 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
953 * Accept numeric system calls in -e.
958 * Introduce "-e trace=desc".
963 * Better x86-64 support for IA32 processes.
964 * Update PowerPC system calls.
965 * Better printing for Linux aio system calls.
969 * Quick fix release for build issues.
970 * One fix for Linux/ARM system call table.
975 * Print fault address for SIGSEGV/SIGBUS signals when available.
980 * Improve socket ioctl printing.
981 * Update Linux/IA64 syscall list.
982 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
983 * Improve mount flags printing.
984 * Support symbolic printing of x86_64 arch_prctl parameters.
989 * Update syscall tables for Alpha, ARM, HPPA.
990 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
991 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
992 * Improve ioctl command name matching.
993 * Print RTC_* ioctl structure contents.
994 * Support newer RLIMIT_* values.
995 * Print struct cmsghdr details in sendmsg.
1000 * Print attribute values in *xattr system calls on Linux.
1001 * Include pread and pwrite calls in -e read and -e write tracing.
1002 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
1003 * Print clock_t values symbolically in Linux clock_* system calls.
1007 * Bug fixes, Linux ioctl updates.
1008 * David Miller contributed support for Linux/SPARC64.
1016 * Update Linux ioctl lists.
1017 * Update PF_* and AF_* value lists.
1018 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
1023 * On Linux using NPTL threads, -p will now attach to all threads in a process.
1024 * Handle new mq_* system calls in Linux 2.6.6 and later.
1029 * Report some new VM_* bit values on Linux.
1030 * Better output for Linux sched_* system calls.
1035 * Display multiple ioctl name matches on Linux.
1039 * New port to AMD's x86-64 architecture. One strace binary can
1040 handle both new x86-64 and old i386 processes.
1041 * Fixed support for LFS64 calls.
1042 * New switch -E to add/remove environment variables for the command.
1043 * Merged s390/s390x port.
1044 * Trace an unbounded number of processes.
1045 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
1046 * Fixed bugs with attach/detach leaving things stopped.
1047 * Fixed traced process seeing ECHILD despite live, traced children
1048 in waitpid calls with WNOHANG.
1049 * Stuart Menefy contributed a port to Linux/SH.
1050 * Stephen Thomas contributed a port to Linux/SH64.
1051 * Many other bug fixes.
1055 * Fix Linux/ia64 support, looks like someone renamed a few things on us
1056 * Fix the ioctl setup for Linux, turned out it did not really work.
1057 Improve the ioctl extractor as well so we decode some more ones.
1061 * compile fixes for Linux/mips
1065 * Linux ia64 and hppa ports added
1066 * The usual Linux syscall updates (includes 32bit uid/gid support),
1067 * Linux ioctl list updated
1068 * Support IPv6 scope ids
1069 * FreeBSD/i386 port added
1070 * UnixWare and Solaris updates
1071 * Better support for tracing multithreaded processes in Linux
1075 * Compiles on glibc2.0 systems again
1076 * Linux/S390 port added
1077 * The usual Linux syscall updates
1078 * we can follow fork on arm now
1082 * Linux/MIPS port added
1083 * Lots of Linux updates again
1084 * Improved IPv6 support
1090 * Compiles on glibc2.0 systems again
1094 * Get stat structure properly on Linux 64bit archs
1095 * Personalities work again
1096 * Compile correctly on SunOS again
1102 * Linux (ultra)sparc fixes
1109 * add support for more Linux architectures (powerpc, sparc, arm)
1110 * support lots more Linux syscalls
1111 * fix signal handling
1112 * add IPX and IPIP support
1113 * check stray syscall after execv
1114 * fix hanging children
1116 Changes in version 3.1
1117 ======================
1119 * Irix5 is supported
1120 * Linux 68k is supported
1121 * Linux alpha is supported
1122 * configure is upgraded to autoconf 2.x
1123 * using -f in combination with -e now works correctly
1124 * output can be piped to a program
1125 * tracing setuid programs works better
1126 * it is now reasonable to install strace setuid to root in some circumstances
1127 * new useful tracing names like file and process to trace whole
1128 classes of system calls, e.g. -efile traces all system calls that
1129 take a file name as an argument
1130 * IPC calls on SunOS 4.1.x are decoded
1131 * Linux program memory is reliably dereferenced
1132 * Linux decodes at least the name of all syscalls as of pre2.0.4
1133 * various cosmetic changes and bug fixes
1135 Changes from versions 2.x to version 3.0
1136 ========================================
1138 * filename arguments are neither abbreviated nor stringified
1139 * string arguments are now true C strings using octal instead of hex by default
1140 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
1141 * by default the output for multiple processes now goes into one file
1142 * all structures, vectors, bitsets, etc. use consistent output formats
1143 * the -c option now means count calls, -i does what the old -c used to do
1145 New Features in version 3.0
1146 ===========================
1148 * non-ascii strings can be optionally printed entirely in hex
1149 * the output format is readable when multiple processes are generating output
1150 * exit values are printed in an alignment column
1151 * is is possible to suppress messages about attaching and detaching
1152 * various tracing features can be enabled on a per syscall/signal/desc basis
1153 * selective tracing of syscalls
1154 * selective printing of syscall structures
1155 * selective abbreviation of long structures on a per syscall basis
1156 * selective printing of raw syscall arguments and results
1157 * selective tracing of signals
1158 * selective dumping of all I/O read from file descriptors
1159 * selective dumping of all I/O written to file descriptors
1160 * optional counting of time, calls, and errors for each syscall
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