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 * IPv6 addresses shown in socket information in -yy mode are now printed
14 * Enhanced decoding of prctl and ptrace syscalls.
15 * Enhanced decoding of BTRFS_IOC_INO_PATHS and BTRFS_IOC_LOGICAL_INO ioctl
17 * Enhanced NETLINK_ROUTE protocol decoding.
18 * Updated lists of signal codes.
19 * Updated lists of BPF_*, BTN_*, ETH_P_*, INET_DIAG_BC_*, KEY_*, POLL*, RWF_*,
20 SCHED_FLAG_*, and SCTP_* constants.
21 * Implemented block/character device number printing in -yy mode.
22 * Known pixel/SDR format names are printed as comments for pixelformat fields
26 * Fixed build on m68k.
27 * Fixed v4l2 pixelformat decoding on big-endian architectures.
29 Noteworthy changes in release 4.21 (2018-02-13)
30 ===============================================
32 * Changes in behaviour
33 * Warning is now issued when -F option is used.
34 * Warning is now issued when a tracee with unsupported personality
36 * Unknown syscall numbers are now printed in hexadecimal form.
39 * Implemented decoding of netlink descriptor attributes as file descriptors.
40 * Implemented decoding of hugetlb page size selection flags.
41 * Implemented decoding of BPF_PROG_TEST_RUN, BPF_PROG_GET_NEXT_ID,
42 BPF_MAP_GET_NEXT_ID, BPF_PROG_GET_FD_BY_ID, BPF_MAP_GET_FD_BY_ID,
43 and BPF_OBJ_GET_INFO_BY_FD commands of bpf syscall.
44 * Enhanced decoding of get_thread_area, memfd_create, modify_ldt,
45 perf_event_open, reboot, s390_guarded_storage, s390_pcio_mmio_read,
46 s390_pci_mmio_write, s390_runtime_instr, s390_sthyi, set_thread_area,
48 * Implemented decoding of KVM_* and DM_LIST_DEVICES ioctl commands.
49 * Implemented decoding of riscv_flush_icache syscall.
50 * Enhanced decoding of getsockopt and setsockopt syscalls for SOL_NETLINK
52 * Enhanced decoding of BPF_MAP_CREATE command of bpf syscall.
53 * Print values returned by mq_open syscall and first arguments
54 of mq_getsetattr, mq_notify, mq_timedreceive, and mq_timedsend syscalls
56 * Added decoding of get_tls syscall on arm.
57 * Added -e trace=%pure option for tracing system calls with no arguments that
59 * Updated lists of IPV6_*, MAP_*, MEMBARRIER_CMD_*, MSG_*, NT_*, PKEY_*,
60 SHM_*, and TCP_* constants.
61 * Added manual page for the strace-log-merge command.
62 * Updated lists of ioctl commands from Linux 4.15.
63 * Implemented biarch support for s390x.
64 * Implemented an optional support for symbol demangling in strace -k output
65 (activated by --with-libiberty configure option).
66 * Information about availability of demangling and reliable personality
67 decoding (on architectures with multiple personalities) is now available
69 * Added decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls on
70 powerpc and powerpc64.
71 * Enhanced manual page.
74 * Fixed multi-personality support in cross builds.
75 * Added mq_getsetattr, mq_notify, mq_open, mq_timedreceive, and mq_timedsend
76 syscalls to %desc tracing set.
77 * Fixed path tracing support for mmap syscalls with indirect arguments and
78 for old select syscall.
79 * Fixed decoding of arm-specific (__ARM_NR_*) syscalls.
80 * Fixed open mode flags decoding.
81 * Fixed corner cases in handling of strace -ff -ttt logs by strace-log-merge.
82 * Error counts that exceed one billion are now printed correctly in call
84 * Fixed call summary header for x32 personality.
85 * Changes of tracee personalities are reported more reliably.
86 * Fixed the case when strace attaches to a tracee being inside exec and its
87 first syscall stop is syscall-exit-stop instead of syscall-enter-stop,
88 which messed up all the syscall state tracking.
89 * Fixed printing of higher 32 bits of the return value for x32 personality.
92 * A C compiler that supports "for" loop initial declarations is now required.
93 * Inability to configure multiple personality support on architectures where
94 multiple personalities are supported leads to configuration failure during
95 build now. Use --enable-mpers=check to revert to the old behaviour.
96 * Build-time requirement for the mpers support has been lowered from gawk 4
98 * Removed incomplete and non-functional support for the CRIS architecture.
99 * Removed incomplete and unused support for IA-32 mode on the IA-64
102 Noteworthy changes in release 4.20 (2017-11-13)
103 ===============================================
106 * Implemented decoding of NETLINK_NETFILTER netlink message types and flags.
107 * Implemented decoding of SECCOMP_GET_ACTION_AVAIL operation of seccomp
109 * Updated lists of ARPHRD_*, BPF_*, ETH_P_*, LOOP_*, MADV_*,
110 MEMBARRIER_CMD_*, MFD_*, SECCOMP_*, SO_*, SOL_*, TCP_*, and UFFD_FEATURE_*
112 * Added decoding of statx syscall on hppa.
113 * Updated lists of ioctl commands from Linux 4.14.
116 * Fixed powerpc personality support on powerpc64.
118 Noteworthy changes in release 4.19 (2017-09-05)
119 ===============================================
121 * Changes in behaviour
122 * Changed formatting of personality names on tile architecture in order
123 to make it in line with other multi-personality architectures.
124 * Changed field output order in struct v4l2_requestbuffers to improve in/out
126 * Changed handling of multiple signal= specifications in an injection
127 expression: multiple specification now leads to error instead of implicit
128 usage the last specification.
131 * Enhanced decoding of optlen argument of getsockopt syscall.
132 * Enhanced decoding of SO_LINGER option of getsockopt and setsockopt syscalls.
133 * Enhanced decoding of SO_PEERCRED option of getsockopt syscall.
134 * Enhanced decoding of IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP,
135 IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_JOIN_ANYCAST,
136 IPV6_LEAVE_ANYCAST, MCAST_JOIN_GROUP, and MCAST_LEAVE_GROUP options
137 of setsockopt syscall.
138 * Enhanced decoding of KEYCTL_DH_COMPUTE operation of keyctl syscall
139 (KDF parameters decoding).
140 * Implemented decoding of KEYCTL_RESTRICT_KEYRING operation of keyctl syscall.
141 * Enhanced decoding of UFFDIO_API ioctl command.
142 * Enhanced decoding of BPF_PROG_LOAD, BPF_MAP_CREATE, BPF_MAP_LOOKUP_ELEM,
143 and BPF_MAP_GET_NEXT_KEY commands of bpf syscall.
144 * Implemented decoding of linux socket filter programs specified
145 for SO_ATTACH_FILTER and SO_ATTACH_REUSEPORT_CBPF socket options.
146 * Implemented decoding of inet_diag_req_v2, inet_diag_req_compat,
147 packet_diag_msg, and smc_diag_msg netlink attributes of NETLINK_SOCK_DIAG.
148 * Implemented NETLINK_SELINUX protocol specific decoding.
149 * Implemented decoding of netlink message ack flags.
150 * Implemented decoding of nlmsgerr netlink attributes.
151 * Implemented basic protocol specific decoding of NETLINK_CRYPTO.
152 * Implemented decoding of crypto_user_alg netlink attributes
154 * Implemented basic protocol specific decoding of addr, addrlabel, dcb, link,
155 mdb, neigh, neightbl, netconf, nsid, route, rule, tc, and tca messages
157 * Implemented decoding of NETLINK_KOBJECT_UEVENT messages.
158 * Improved handling of unexpected tracees (the ones that cloned with
159 CLONE_PARENT/CLONE_PTRACE or called PTRACE_TRACEME on themselves): they
160 are now PTRACE_DETACH'ed instead of PTRACE_CONT'ed.
161 * Updated lists of BPF_*, KEY_*, RWF_*, SCM_*, SO_*, and *_MAGIC constants.
162 * Added decoding of arch_prctl syscall on x86.
163 * Added decoding of seccomp, bpf, userfaultfd, membarrier, mlock2,
164 copy_file_range, preadv2, pwritev2, and statx on alpha.
165 * Added decoding of statx syscall on microblaze.
166 * Added decoding of s390_guarded_storage syscall on s390.
167 * Updated lists of ioctl commands from Linux 4.13.
168 * Enhanced manual page.
171 * Fixed printing of group_req structure on non-native personalities.
172 * Fixed output formatting of blkpg_ioctl_arg, dm_name_list, and iocb
174 * Fixed formatting of nul-terminated strings which have kernel-imposed size
176 * Fixed printing of paths that hit PATM_MAX limit in order to match kernel's
178 * Fixed build warnings on Android mips64.
179 * Fixed unused function "is_negated_errno" build warning when built
181 * Fixed syscall number and arguments retrieval behaviour on sparc64 and
182 mips o32 after prctl(PR_SET_DUMPABLE, 0) makes PTRACE_PEEKTEXT impossible
183 to use if Linux kernel has commit v4.10-rc1~114^2~2.
184 * Fixed path tracing for execveat, symlink, symlinkat, inotify_add_watch,
185 and inotify_init syscalls.
186 * Fixed personality switch printing on sparc64 and risc-v.
188 Noteworthy changes in release 4.18 (2017-07-05)
189 ===============================================
192 * Implemented decoding of SCM_TIMESTAMP* control messages.
193 * Implemented decoding of netlink NLMSG_DONE messages.
194 * Implemented decoding of netlink generic nlmsg_type and nlmsg_flags.
195 * Implemented decoding of NETLINK_AUDIT, NETLINK_NETFILTER, NETLINK_ROUTE,
196 NETLINK_SELINUX, NETLINK_SOCK_DIAG, and NETLINK_XFRM message types.
197 * Implemented decoding of NETLINK_GENERIC protocol families.
198 * Implemented basic protocol specific decoding of AF_INET, AF_INET6,
199 AF_NETLINK, AF_PACKET, AF_SMC, and AF_UNIX messages of NETLINK_SOCK_DIAG.
200 * Implemented basic decoding of netlink attributes.
201 * Implemented basic protocol specific decoding of AF_INET, AF_NETLINK,
202 AF_PACKET, AF_SMC, and AF_UNIX netlink attributes of NETLINK_SOCK_DIAG.
203 * Implemented decoding of inet_diag_msg, netlink_diag_msg, and unix_diag_msg
204 netlink attributes of NETLINK_SOCK_DIAG.
205 * Updated lists of ARPHRD_*, KEYCTL_*, NDIAG_SHOW_*, RTM_*, SCM_*, SCTP_*,
206 SO_*, V4L2_*, and prctl ARCH_* constants.
207 * Updated lists of ioctl commands from Linux 4.12.
210 * In interactive mode (-I2), those signals that were blocked at startup
211 will remain blocked for the whole period of strace execution.
212 * strace no longer resets SIGCHLD handler in tracees to the default action.
213 * When traced command is terminated by a blocked signal, strace unblocks
214 that signal to ensure its own termination with the same signal.
215 * Fixed corner cases in decoding of old sigaction syscall.
216 * Fixed build with old kernel headers on mips.
217 * Fixed build on aarch64 and tile with glibc >= 2.26.
218 * Fixed build on arc and nios2.
220 Noteworthy changes in release 4.17 (2017-05-24)
221 ===============================================
223 * Changes in command line syntax
224 * Syscall classes specified in -e trace= option now have % prefix (like
225 -e trace=%process). Old style class names without leading % are still
226 supported, but considered deprecated now.
229 * Optimized syscall filtering.
230 * Improved representation of timestamps.
231 * Enhanced decoding of sched_setattr syscall.
232 * Added -e trace=%stat option for tracing variants of stat syscall.
233 * Added -e trace=%lstat option for tracing variants of lstat syscall.
234 * Added -e trace=%fstat option for tracing variants of fstat and fstatat
236 * Added -e trace=%%stat option for tracing syscalls used for querying file
237 status information (stat, lstat, fstat, fstatat, statx, and their
239 * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs
241 * Added -e trace=%fstatfs option for tracing fstatfs, fstatfs64 and fstatvfs
243 * Added -e trace=%%statfs option for tracing syscalls used for querying file
244 system statistics information (statfs-like, fstatfs-like and ustat).
245 * Added -e trace=/regex option for filtering syscalls using regular
247 * Added support for prepending of question mark before syscall qualification
248 in -e trace expressions in order to suppress error in case no syscalls
249 matched the provided qualification.
250 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
251 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
252 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
254 * Implemented decoding of statx syscall.
255 * Implemented decoding of NS_* ioctl commands.
256 * Implemented decoding of the remaining V4L2_BUF_TYPE_* types.
257 * Implemented decoding of VIDIOC_[SG]_TUNER ioctl commands.
258 * Implemented decoding of NLMSG_ERROR netlink messages.
259 * Improved decoding of BPF_PROG_ATTACH command of bpf syscall.
260 * Improved decoding of misplaced parts in DM_* ioctl commands.
261 * Updated lists of ioctl commands from Linux 4.11.
264 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
265 * Fixed the number of arguments and tracing flags of alpha specific syscalls.
266 * Fixed decoding of old sigsuspend syscall on alpha, cris, mips, powerpc,
267 powerpc64, sh, sh64, sparc, and sparc64.
268 * Fixed decoding of sgetmask and ssetmask syscalls on 64-bit architectures.
269 * Fixed decoding of netlink messages received within struct msghdr.
270 * Worked around a bug in miscompiled aarch64 kernels leading to the 3rd
271 argument of sched_getattr syscall being not quite 32-bit.
272 * Fixed corner cases of printing inaccessible times argument of utimes
273 and futimesat syscalls.
275 Noteworthy changes in release 4.16 (2017-02-14)
276 ===============================================
279 * Implemented syscall return value injection (-e inject=SET:retval= option).
280 * Implemented signal injection (-e inject=SET:signal= option).
281 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
282 * Implemented decoding of all SG_* ioctl commands.
283 * Implemented decoding of ustat syscall.
284 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
285 and BPF_PROG_DETACH commands of bpf syscall.
286 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
287 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
289 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
290 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
291 * Updated lists of ioctl commands from Linux 4.10.
292 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
296 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
297 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
298 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
299 and pwritev* syscalls on x32.
300 * Fixed printing of string arguments of getxattr and setxattr syscalls
301 when -s option is used to limit the printed string size.
302 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
304 * Fixed decoding of SG_* and LOOP_* ioctl commands.
305 * Fixed build on mips with musl libc.
306 * Fixed cross-building of ioctlsort.
307 * Applied minor formatting fixes to the manual page.
309 Noteworthy changes in release 4.15 (2016-12-14)
310 ===============================================
312 * Changes in behavior
313 * Time stamps are now printed according to ISO 8601.
314 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
315 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
316 syscalls is now formatted as an array.
319 * Implemented syscall fault injection (-e fault=... option).
320 * Implemented decoding of DM_* ioctl commands.
321 * Implemented decoding of attr parameter of perf_event_open syscall.
322 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
323 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
324 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
326 * Implemented PTRACE_GETREGS API support on m68k.
327 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
328 and V4L2_* constants.
329 * Updated lists of ioctl commands from Linux 4.9.
330 * Added decoding of recently added syscalls on arc, x32, and xtensa.
331 * Enhanced manual page.
334 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
335 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
336 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
337 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
338 setgroups, setns, unshare, and utimes syscalls.
339 * Fixed handling of verbose flag in printing of controls array
340 of struct v4l2_ext_controls.
341 * Fixed omission of field names in the output of capability, sigaction,
342 sigevent, statfs, timespec, timeval, and utimbuf structures.
343 * Fixed printing of unknown syscalls in siginfo structure.
344 * Fixed decoding of ioctl constants on m68k.
345 * Fixed cris architecture support.
346 * Fixed cross build when host compiler does not support the same
347 set of warning flags as the cross compiler.
348 * Fixed build on SLE10 and SLE11.
350 Noteworthy changes in release 4.14 (2016-10-04)
351 ===============================================
353 * Changes in behavior
354 * When using -p option without a command and no processes has been attached,
355 strace exits with exit status 1.
358 * Added printing of the mode argument of open and openat syscalls
359 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
360 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
361 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
362 and aio family syscalls.
363 * Implemented fetching of the 7th subcall argument on mips o32.
364 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
366 * Updated lists of ioctl commands from Linux 4.8.
367 * Added decoding of new syscalls on sh and sh64.
368 * Added RISC-V architecture support.
371 * Marked io_setup and io_destroy as memory mapping related syscalls.
372 * Fixed leakage of placeholder descriptors to tracees.
373 * Fixed printing of mode_t, umode_t, and umask types.
374 * Fixed decoding of iovec arrays without a limit on total data size.
375 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
376 and ipc family syscalls.
377 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
378 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
380 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
381 * Fixed decoding of struct stat64 on sparc64.
382 * Fixed decoding of uid and gid-related syscalls on sparc64.
383 * Fixed decoding of the forth argument of semctl syscall on sparc64.
384 * Fixed values of tty ioctl constants on sparc64.
385 * Fixed sparc personality support on sparc64.
387 Noteworthy changes in release 4.13 (2016-07-26)
388 ===============================================
391 * Implemented a general netlink socket parser.
392 * Enhanced decoding of socket addresses.
393 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
394 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
395 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
396 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
397 and *_MAGIC constants.
398 * Updated lists of ioctl commands from Linux 4.7.
401 * Fixed decoding of pid_t argument of prlimit64 syscall.
402 * Fixed sign extension issues in the parser of struct rusage.
403 * Fixed race condition in decoding of timeout argument of recvmmsg and
404 rt_sigtimedwait syscalls.
405 * Fixed build with fresh linux kernel headers.
407 Noteworthy changes in release 4.12 (2016-05-31)
408 ===============================================
411 * Implemented simultaneous use of -p option and tracing of a command.
412 (addresses Debian bug #549942).
413 * Implemented caching of netlink conversations to reduce amount of time
414 spent in decoding socket details in -yy mode.
415 * Implemented -yy mode decoding of protocol:portid pairs associated with
416 netlink socket descriptors.
417 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
418 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
420 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
421 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
422 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
423 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
424 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
425 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
426 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
427 statfs64, tgkill, waitid, and xattr family syscalls.
428 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
429 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
430 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
431 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
432 * Added decoding of fadvise64 and fadvise64_64 on s390.
433 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
434 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
435 * Updated lists of ioctl commands from Linux 4.6.
438 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
439 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
440 * Fixed decoding of mlock2 syscall on sparc.
441 * Fixed decoding of osf_shmat syscall on alpha.
442 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
443 (addresses Debian bug #485979 and Fedora bug #1298294).
444 * Fixed decoding of preadv syscall in case of short read.
445 * Fixed decoding and dumping of readv syscall in case of short read.
446 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
447 * Fixed decoding of mincore syscall's last argument.
448 * Fixed remaining errors in mapping between syscall numbers and numbers
449 of syscall arguments.
450 * Applied various fixes to strace-graph script.
452 Noteworthy changes in release 4.11 (2015-12-21)
453 ===============================================
455 * Changes in behavior
456 * Some syscalls have different names depending on architecture and
457 personality. In these cases, syscall filtering and printing now
458 consistently uses the names that match corresponding __NR_* kernel
459 macros of the tracee's architecture and personality.
460 * Added strace prefix to all diagnostic messages.
463 * Enhanced and extended test suite.
464 * Implemented reliable tracing of processes whose personality differs
465 from the personality of strace, fixed decoding of 32-bit personality
466 syscalls on 64-bit architectures.
467 * When some data referenced by syscall arguments is irrelevant or cannot
468 be read from tracee's memory, strace now prints its address consistently.
469 * When a syscall is restarted using restart_syscall mechanism, strace now
470 shows the syscall name on architectures that expose this information.
471 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
472 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
473 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
474 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
475 * Optimized decoding of indirect socket syscalls.
476 * Implemented decoding of nanoseconds along with seconds in stat family
477 syscalls (addresses Fedora bug #1251176).
478 * Implemented decoding of struct statfs.f_flags in statfs syscall.
479 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
481 * Implemented decoding of indirect syscall on mips o32.
482 * Implemented decoding of IPPROTO_IP control messages.
483 * Implemented decoding of setsockopt syscall multicast arguments.
484 * Enhanced decoding of struct sigevent.
485 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
486 and v4l2 ioctl syscall arguments.
487 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
488 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
489 sendfile, setsockopt, and shmctl syscalls.
490 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
491 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
492 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
493 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
494 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
495 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
497 * Added Nios II architecture support.
498 * Added new syscall entries to match Linux 4.4.
501 * Fixed potential short read of strings from tracee's memory.
502 * Fixed -qq option in conjunction with -o option.
503 * Fixed filtering of <unavailable> syscalls.
504 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
505 with 64-bit aligned structures.
506 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
507 syscall flags arguments.
508 * Fixed decoding of 4th argument of clock_nanosleep syscall.
509 * Fixed decoding of getpagesize syscall on m68k.
510 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
511 * Fixed decoding of timezone argument of gettimeofday and settimeofday
513 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
515 * Fixed decoding of pipe syscall on alpha and mips.
516 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
517 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
518 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
520 * Fixed decoding of 4th argument of semctl indirect syscall.
521 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
522 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
523 * Fixed decoding of struct dirent on x32.
524 * Fixed decoding of times syscall return value on mips n32 and x32.
525 * Fixed decoding of path argument of umount2 syscall
526 (addresses Debian bug #785050).
527 * Worked around a kernel bug in tracing privileged executables.
528 * Fixed various errors in mapping between syscall numbers and associated
529 information like the number of syscall arguments, the name of syscall,
532 Noteworthy changes in release 4.10 (2015-03-06)
533 ===============================================
536 * Added -yy option to print protocol and address information associated with
538 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
539 recvmsg, sendmmsg, and recvmmsg syscalls.
540 * Implemented full 32-bit decoding of ioctl commands
541 (addresses Debian bug #692913 and Fedora bug #902788).
542 * Implemented PTRACE_GETREGS API support on ia64.
543 * Implemented PTRACE_GETREGS API support on mips.
544 * Implemented PTRACE_GETREGSET API support on s390/s390x.
545 * Implemented decoding of getrandom and seccomp syscalls.
546 * Implemented full decoding of 64-bit capability sets.
547 * Implemented decoding of all prctl commands.
548 * Implemented decoding of parametrized ioctl commands.
549 * Implemented decoding of evdev ioctl commands.
550 * Implemented decoding of v4l ioctl commands.
551 * Implemented decoding of SG_IO v4 ioctl commands.
552 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
553 * Implemented decoding of FALLOC_FL_* fallocate flags.
554 * Implemented decoding of rt_sigreturn signal mask on aarch64,
556 * Enhanced socket decoder to support bluetooth sockets.
557 * Enhanced decoding of unlisted ioctl commands.
558 * Enhanced decoding of getsockopt and setsockopt syscall.
559 * Enhanced decoding of sysinfo syscall.
560 * Enhanced decoding of struct cmsghdr.
561 * Enhanced decoding of wait status.
562 * Enhanced aio support on non-x86 architectures by using external libaio.h.
563 * Added O_TMPFILE to the list of recognized open mode flags.
564 * Updated the list of filesystem type constants that is used in decoding
565 statfs family syscalls.
566 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
568 * Updated lists of signal constants from Linux 3.19.
569 * Updated lists of errno constants from Linux 3.19.
570 * Updated lists of ioctl commands from Linux 3.9.
571 * Added new syscall entries to match Linux 3.19.
574 * Fixed various errors in mapping between syscall numbers and associated
575 information like the number of syscall arguments, the name of syscall,
577 * Fixed quoting issues in printing descriptors, filenames, network interface
578 names, struct utsname members, device/volume names of BLK* ioctl commands.
579 * Fixed uid_t/git_t decoding.
580 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
581 * Fixed potential open flags truncation on some architectures.
582 * Fixed decoding of struct ifreq.ifr_name.
583 * Fixed decoding of SIOCSIFNAME ioctl command.
584 * Fixed decoding of RENAME_* renameat2 flags.
585 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
586 * Fixed decoding of indirect ipc subcalls on some architectures.
587 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
588 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
589 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
590 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
591 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
592 sparc, sparc64, mips, and s390.
593 * Fixed instruction pointer output (-i option) on architectures that support
594 several personalities.
595 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
597 * Fixed build on systems where struct sigaction has no sa_restorer member.
598 * Fixed build with uclibc and musl libc.
601 * Linux kernel >= 2.5.46 is required.
602 Older versions without a decent PTRACE_SETOPTIONS support will not work.
603 * On mips, linux kernel >= 2.6.15 is required.
604 Older versions without a decent PTRACE_GETREGS support will not work.
605 * On s390 and s390x, linux kernel >= 2.6.27 is required.
606 Older versions without a decent PTRACE_GETREGSET support will not work.
608 Noteworthy changes in release 4.9 (2014-08-15)
609 ==============================================
611 * Changes in behavior
612 * Disabled OABI support on ARM EABI systems by default,
613 added --enable-arm-oabi option to enable it at configure time.
616 * Added experimental -k option to print stack trace after each traced syscall.
617 * Added -w option to produce stats on syscall latency.
618 (addresses Debian bug #457497).
619 * Added ARC architecture support.
620 * Added PTRACE_GETREGS API support on PowerPC.
621 * Enhanced Bionic libc and musl libc support.
622 * Enhanced tracing of x86 personality processes on x86_64 and x32.
623 * Enhanced tracing of ARM personality processes on AArch64.
624 * Enhanced 32/64bit personality detection on PowerPC.
625 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
626 renameat2, and request_key syscalls.
627 * Robustified decoding of select, pselect, and io_submit syscalls.
628 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
629 setdomainname, sethostname, setns, and sync_file_range syscalls.
630 * Enhanced decoding of signal bitmasks.
631 * Enhanced decoding of file descriptors.
632 * Enhanced siginfo_t decoding.
633 * Enhanced PF_NETLINK decoding.
634 * Updated CLOCK_* constants
635 (addresses Fedora bug #1088455).
636 * Added new syscall entries to match Linux 3.16.
639 * Added shmat and shmdt to the set of memory mapping related syscalls.
640 * Fixed detaching from stopped processes.
641 * Fixed fanotify_mark decoding on 32bit architectures.
642 * Fixed offset decoding in preadv and pwritev syscalls.
643 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
644 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
645 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
646 (addresses Fedora bug #993384).
647 * Miscellaneous corrections in the manual page.
648 (Addresses Debian bug #725987).
650 Noteworthy changes in release 4.8 (2013-06-03)
651 ==============================================
653 * Changes in behavior
654 * In case of normal strace termination, when the trace output is
655 redirected to a pipe, strace now closes it and waits for the pipe
656 process termination before exit.
659 * Implemented tracing using PTRACE_SEIZE API (when available).
660 * Implemented more reliable PTRACE_GETREGSET-based process personality
661 detection on x86-64 and x32 (when available).
662 * Added -e trace=memory option for tracing memory mapping related syscalls.
663 * Documented -b option.
664 * Allowed exit status messages to be suppressed by giving -q option twice.
665 * Added AArch64 architecture support
666 (addresses Debian bug #693074 and Fedora bug #969858).
667 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
668 * Added tilegx personality support for Tile.
669 * Enhanced support of NOMMU architectures.
670 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
672 * Added new syscall entries to match Linux 3.9.
673 * Regenerated the list of common ioctl names from Linux 3.9.
674 * Updated the list of errno constants.
675 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
676 PTRACE_O_*, and TCP_* constants.
677 * Implemented decoding of UBI ioctls.
678 * Removed redundant "*32" ioctl names.
681 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
682 (addresses Fedora bug #659382).
683 * Fixed kernel release string parsing
684 (addresses Debian bug #702309).
685 * Fixed decoding of *xattr syscalls
686 (addresses Fedora bug #885233).
687 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
688 (addresses Fedora bug #912790).
689 * Fixed tracing forks on SPARC.
690 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
691 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
692 and truncate64 syscalls.
693 * Fixed categories of multiple syscalls on most of supported architectures.
694 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
695 * Fixed decoding of multiple 32-bit personality syscalls on x32.
696 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
697 S390x, and Tile architectures.
698 * Fixed semtimedop decoding on S390x.
699 * Fixed sram_alloc decoding on Blackfin.
700 * Fixed build when process_vm_readv is a stab.
701 * Fixed build with older versions of libaio.h.
703 Noteworthy changes in release 4.7 (2012-05-02)
704 ==============================================
706 * Changes in behavior
707 * strace no longer suspends waitpid until there is a child
708 for waitpid'ing process to collect status from.
709 * strace no longer detaches from a tracee which is supposed
711 * strace now issues a new message: "+++ exited with EXITCODE +++"
712 which shows exact moment strace got exit notification,
713 analogous to existing "+++ killed by SIG +++" message.
716 * Added x32 personality support (x86_64 architecture).
717 * Added -y and -P options to print file descriptor paths and
718 filter by those paths.
719 * Added -I option to control strace interactivity.
720 * Allowed -p option to take comma or whitespace-separated list of PIDs.
721 * Added strace_log_merge script helper to merge timestamped "strace -ff"
723 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
724 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
725 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
726 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
727 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
728 listxattr, setrlimit and swapon syscalls.
729 * Implemented decoding of loop and mtd ioctls.
730 * Added syscall entries for new linux syscalls.
731 * Added syscall entries for direct socket system calls on powerpc.
732 * Updated the list of errno constants.
733 * Updated lists of MSG_*, STA_*, and TCP_* constants.
734 * Regenerated the list of ioctl names from Linux 3.3.
735 * Enhanced switching between processes with different personalities.
736 * Enhanced signals reporting by using short signal names.
737 * Made ERESTART* messages more descriptive.
738 * Made parsing of numbers from strings more robust.
739 * Added support for compat_statfs64 and statfs64.f_flags.
740 * Changed read of data blocks to use single process_vm_readv syscall
741 (when available) instead of several PTRACE_PEEKDATA operations.
742 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
743 operation instead of several PTRACE_PEEKUSER operations.
744 * Applied various optimizations to make strace work faster.
747 * Implemented proper handling of real SIGTRAPs on kernels supporting
748 PTRACE_O_TRACESYSGOOD.
749 (Addresses Fedora bug #162774).
750 * Fixed sockaddr_un.sun_path name in decoded output.
751 (Addresses Debian bug #554946).
752 * Fixed to avoid potential core file clobbering on exit.
753 (Addresses Debian bug #656398).
754 * Fixed a typo in documentation.
755 (Addresses Debian bug #653309).
756 * Fixed decoding of timer id returned by timer_create.
757 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
758 * Fixed *at syscalls flags decoding.
759 * Fixed ARM EABI 64-bit syscall's arguments decoding.
760 * Fixed semtimedop decoding on s390.
761 * Fixed osf_sigprocmask decoding on alpha.
762 * Fixed ipc and socket subcall decoding on several architectures.
763 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
764 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
765 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
766 * Corrected io_* syscall entries on ARM.
767 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
768 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
769 * Fixed build when libaio-devel is not available.
770 * Fixed configure checks for PTRACE_* constants.
771 * Fixed compilation warnings remained on several architectures.
774 * Removed all non-Linux code. After years of neglect, that dead code
775 just hampered further strace development.
776 * Linux kernel >= 2.6.18 is recommended. Older versions might still
777 work but they haven't been thoroughly tested with this release.
779 Noteworthy changes in release 4.6 (2011-03-15)
780 ==============================================
782 * Changes in behavior
783 * Print diagnostic information about changes in personality mode to
784 standard error instead of standard output.
787 * Implemented a new method of following clone, fork, and vfork
788 syscalls using the Linux kernel's explicit facilities for tracing
789 creation of threads and child processes.
790 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
791 * Implemented decoding of TLS syscalls on m68k.
792 * Implemented biarch support on powerpc64.
793 * Implemented biarch support for getrlimit() and setrlimit().
794 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
795 * Implemented SOL_SCTP socket options decoding.
796 * Added HDIO_* ioctl names.
797 (Addresses Debian bug #450953).
798 * Added LOOP_* ioctl names.
799 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
800 to match Linux 2.6.37.
801 * Updated the list of IPPROTO_* constants to match netinet/in.h.
802 * Implemented decoding of HDIO_* and BLK* ioctls.
803 * Added MicroBlaze architecture support.
804 * Added new syscall entries to match Linux 2.6.37.
805 * Regenerated list of ioctl names from Linux 2.6.37.
806 * Enhanced signal notification decoding.
807 * Documented -C and -D options.
810 * Fixed fetching syscall arguments on m68k.
811 * Fixed an error when judging whether a process has children.
812 * Fixed get/set_robust_list syscall numbers for powerpc.
813 * Fixed a corner case in printing clone flags.
814 * Fixed cross-compiling issues.
815 * Fixed build issues on powerpc64, SH and SPARC.
816 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
817 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
818 fanotify_init, and fanotify_mark syscalls.
819 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
820 * Fixed biarch support in IO dumping.
821 * Fixed raw exit_group decoding.
822 * Fixed decoding of file descriptors on 64-bit architectures.
823 * Fixed a corner case in waitpid handling.
824 (Addresses Red Hat bug #663547).
825 * Fixed stat64 decoding on mips
826 (Addresses Debian bug #599028).
827 * Fixed misleading italics in the manual page.
828 (Addresses Debian bug #589323).
830 Noteworthy changes in release 4.5.20 (2010-04-13)
831 =================================================
834 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
835 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
836 rt_tgsigqueueinfo, perf_event_open.
837 * Enhanced decoding of recently added syscalls on non-x86 architectures
838 by replacing a bare decoder with elaborate parsers enabled earlier
840 * Implemented -C option to combine regular and -c output.
841 (Addresses Debian bug #466196)
842 * Enhanced decoding of mbind and mremap syscalls.
843 * Enhanced SOL_PACKET socket options decoding.
844 * Regenerated list of ioctl names from linux 2.6.33.
845 * Added TILE architecture support.
848 * Fixed build with Linux kernel headers 2.6.32-rc5+.
849 (Addresses Debian bug #560516 and Fedora bug #539044)
850 * Fixed build on mips.
851 * Fixed handling of Linux systems without struct statfs64.
852 * Fixed reporting signal mask by sigreturn on powerpc.
853 * Fixed potential stack buffer overflow in select decoder.
854 (Addresses Fedora bug #556678)
855 * Corrected msgsnd indirect ipccall decoding.
856 * Corrected decoding of 64bit syscalls.
857 (Addresses Debian bug #570603)
858 * Corrected getsockopt decoding on architectures where
859 sizeof(long) > sizeof(int).
860 (Addresses Debian bug #494844)
861 * Corrected decoding of epoll_pwait.
862 (Addresses Debian bug #513014)
863 * Corrected handling of killed threads.
865 Noteworthy changes in release 4.5.19 (2009-10-21)
866 =================================================
868 * Changes in behavior
869 * When command exits, strace now exits with the same exit status.
870 If command is terminated by a signal, strace terminates itself
871 with the same signal, so that strace can be used as a wrapper
872 process transparent to the invoking parent process.
873 When using -p option, the exit status of strace is zero unless
874 there was an unexpected error in doing the tracing.
875 (Addresses Fedora bug #105371 and Debian bug #37665)
878 * Implemented decoding of new Linux syscalls: accept4, dup3,
879 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
880 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
881 * Implemented decoding of accept4 socketcall.
882 * Enhanced prctl decoding.
883 * Enhanced nanosleep decoding.
884 * Enhanced ptrace decoding.
885 * Enhanced futex decoding.
886 * Enhanced CAP_* decoding.
887 * Enhanced SIOCS* ioctls decoding.
888 * Enhanced fcntl F_* flags decoding.
889 * Enhanced semop/semtimedop decoding.
890 * Updated ARM architecture support.
891 * Added Blackfin architecture support.
892 * Added AVR32 architecture support.
893 * Added CRIS architecture support.
894 * Made strace detect when traced process suddenly disappeared.
897 * Fixed syscall numbers for tee and sync_file_range.
898 (Addresses Debian bug #503124)
899 * Fixed several bugs in strings decoder, including potential heap
901 (Addresses Fedora bugs #470529, #478324 and #511035)
902 * Marked sendfile(2) as a network syscall.
903 (Addresses Debian bug #509499)
904 * Fixed accept(2) decoding.
905 (Addresses Debian bug #507573)
906 * Fixed sigtimedwait(2) decoding.
907 * Fixed build on ARM EABI.
908 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
909 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
910 (Addresses Red Hat bug #471169)
911 * Fixed display of 32-bit argv array on 64-bit architectures.
912 (Addresses Fedora bug #519480)
913 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
914 * Fixed HPPA architecture support.
915 (Addresses Debian bugs #437928 and #546619)
920 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
921 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
926 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
927 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
928 * Improved output for prctl system call on Linux.
929 * Improved support for Linux/ARM.
930 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
935 * Improved output for delete_module, futex, and mbind system calls on Linux.
936 * Improved output for SG_IO ioctls on Linux.
937 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
938 eventfd, getcpu, epoll_pwait.
943 * Several biarch improvements.
944 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
945 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
950 * Accept numeric system calls in -e.
955 * Introduce "-e trace=desc".
960 * Better x86-64 support for IA32 processes.
961 * Update PowerPC system calls.
962 * Better printing for Linux aio system calls.
966 * Quick fix release for build issues.
967 * One fix for Linux/ARM system call table.
972 * Print fault address for SIGSEGV/SIGBUS signals when available.
977 * Improve socket ioctl printing.
978 * Update Linux/IA64 syscall list.
979 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
980 * Improve mount flags printing.
981 * Support symbolic printing of x86_64 arch_prctl parameters.
986 * Update syscall tables for Alpha, ARM, HPPA.
987 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
988 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
989 * Improve ioctl command name matching.
990 * Print RTC_* ioctl structure contents.
991 * Support newer RLIMIT_* values.
992 * Print struct cmsghdr details in sendmsg.
997 * Print attribute values in *xattr system calls on Linux.
998 * Include pread and pwrite calls in -e read and -e write tracing.
999 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
1000 * Print clock_t values symbolically in Linux clock_* system calls.
1004 * Bug fixes, Linux ioctl updates.
1005 * David Miller contributed support for Linux/SPARC64.
1013 * Update Linux ioctl lists.
1014 * Update PF_* and AF_* value lists.
1015 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
1020 * On Linux using NPTL threads, -p will now attach to all threads in a process.
1021 * Handle new mq_* system calls in Linux 2.6.6 and later.
1026 * Report some new VM_* bit values on Linux.
1027 * Better output for Linux sched_* system calls.
1032 * Display multiple ioctl name matches on Linux.
1036 * New port to AMD's x86-64 architecture. One strace binary can
1037 handle both new x86-64 and old i386 processes.
1038 * Fixed support for LFS64 calls.
1039 * New switch -E to add/remove environment variables for the command.
1040 * Merged s390/s390x port.
1041 * Trace an unbounded number of processes.
1042 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
1043 * Fixed bugs with attach/detach leaving things stopped.
1044 * Fixed traced process seeing ECHILD despite live, traced children
1045 in waitpid calls with WNOHANG.
1046 * Stuart Menefy contributed a port to Linux/SH.
1047 * Stephen Thomas contributed a port to Linux/SH64.
1048 * Many other bug fixes.
1052 * Fix Linux/ia64 support, looks like someone renamed a few things on us
1053 * Fix the ioctl setup for Linux, turned out it did not really work.
1054 Improve the ioctl extractor as well so we decode some more ones.
1058 * compile fixes for Linux/mips
1062 * Linux ia64 and hppa ports added
1063 * The usual Linux syscall updates (includes 32bit uid/gid support),
1064 * Linux ioctl list updated
1065 * Support IPv6 scope ids
1066 * FreeBSD/i386 port added
1067 * UnixWare and Solaris updates
1068 * Better support for tracing multithreaded processes in Linux
1072 * Compiles on glibc2.0 systems again
1073 * Linux/S390 port added
1074 * The usual Linux syscall updates
1075 * we can follow fork on arm now
1079 * Linux/MIPS port added
1080 * Lots of Linux updates again
1081 * Improved IPv6 support
1087 * Compiles on glibc2.0 systems again
1091 * Get stat structure properly on Linux 64bit archs
1092 * Personalities work again
1093 * Compile correctly on SunOS again
1099 * Linux (ultra)sparc fixes
1106 * add support for more Linux architectures (powerpc, sparc, arm)
1107 * support lots more Linux syscalls
1108 * fix signal handling
1109 * add IPX and IPIP support
1110 * check stray syscall after execv
1111 * fix hanging children
1113 Changes in version 3.1
1114 ======================
1116 * Irix5 is supported
1117 * Linux 68k is supported
1118 * Linux alpha is supported
1119 * configure is upgraded to autoconf 2.x
1120 * using -f in combination with -e now works correctly
1121 * output can be piped to a program
1122 * tracing setuid programs works better
1123 * it is now reasonable to install strace setuid to root in some circumstances
1124 * new useful tracing names like file and process to trace whole
1125 classes of system calls, e.g. -efile traces all system calls that
1126 take a file name as an argument
1127 * IPC calls on SunOS 4.1.x are decoded
1128 * Linux program memory is reliably dereferenced
1129 * Linux decodes at least the name of all syscalls as of pre2.0.4
1130 * various cosmetic changes and bug fixes
1132 Changes from versions 2.x to version 3.0
1133 ========================================
1135 * filename arguments are neither abbreviated nor stringified
1136 * string arguments are now true C strings using octal instead of hex by default
1137 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
1138 * by default the output for multiple processes now goes into one file
1139 * all structures, vectors, bitsets, etc. use consistent output formats
1140 * the -c option now means count calls, -i does what the old -c used to do
1142 New Features in version 3.0
1143 ===========================
1145 * non-ascii strings can be optionally printed entirely in hex
1146 * the output format is readable when multiple processes are generating output
1147 * exit values are printed in an alignment column
1148 * is is possible to suppress messages about attaching and detaching
1149 * various tracing features can be enabled on a per syscall/signal/desc basis
1150 * selective tracing of syscalls
1151 * selective printing of syscall structures
1152 * selective abbreviation of long structures on a per syscall basis
1153 * selective printing of raw syscall arguments and results
1154 * selective tracing of signals
1155 * selective dumping of all I/O read from file descriptors
1156 * selective dumping of all I/O written to file descriptors
1157 * optional counting of time, calls, and errors for each syscall
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