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
26 * Enhanced decoding of kern_features syscall.
28 * Updated lists of ioctl commands from Linux 4.16.
31 * Fixed build on m68k.
32 * Fixed v4l2 pixelformat decoding on big-endian architectures.
35 Noteworthy changes in release 4.21 (2018-02-13)
36 ===============================================
38 * Changes in behaviour
39 * Warning is now issued when -F option is used.
40 * Warning is now issued when a tracee with unsupported personality
42 * Unknown syscall numbers are now printed in hexadecimal form.
45 * Implemented decoding of netlink descriptor attributes as file descriptors.
46 * Implemented decoding of hugetlb page size selection flags.
47 * Implemented decoding of BPF_PROG_TEST_RUN, BPF_PROG_GET_NEXT_ID,
48 BPF_MAP_GET_NEXT_ID, BPF_PROG_GET_FD_BY_ID, BPF_MAP_GET_FD_BY_ID,
49 and BPF_OBJ_GET_INFO_BY_FD commands of bpf syscall.
50 * Enhanced decoding of get_thread_area, memfd_create, modify_ldt,
51 perf_event_open, reboot, s390_guarded_storage, s390_pcio_mmio_read,
52 s390_pci_mmio_write, s390_runtime_instr, s390_sthyi, set_thread_area,
54 * Implemented decoding of KVM_* and DM_LIST_DEVICES ioctl commands.
55 * Implemented decoding of riscv_flush_icache syscall.
56 * Enhanced decoding of getsockopt and setsockopt syscalls for SOL_NETLINK
58 * Enhanced decoding of BPF_MAP_CREATE command of bpf syscall.
59 * Print values returned by mq_open syscall and first arguments
60 of mq_getsetattr, mq_notify, mq_timedreceive, and mq_timedsend syscalls
62 * Added decoding of get_tls syscall on arm.
63 * Added -e trace=%pure option for tracing system calls with no arguments that
65 * Updated lists of IPV6_*, MAP_*, MEMBARRIER_CMD_*, MSG_*, NT_*, PKEY_*,
66 SHM_*, and TCP_* constants.
67 * Added manual page for the strace-log-merge command.
68 * Updated lists of ioctl commands from Linux 4.15.
69 * Implemented biarch support for s390x.
70 * Implemented an optional support for symbol demangling in strace -k output
71 (activated by --with-libiberty configure option).
72 * Information about availability of demangling and reliable personality
73 decoding (on architectures with multiple personalities) is now available
75 * Added decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls on
76 powerpc and powerpc64.
77 * Enhanced manual page.
80 * Fixed multi-personality support in cross builds.
81 * Added mq_getsetattr, mq_notify, mq_open, mq_timedreceive, and mq_timedsend
82 syscalls to %desc tracing set.
83 * Fixed path tracing support for mmap syscalls with indirect arguments and
84 for old select syscall.
85 * Fixed decoding of arm-specific (__ARM_NR_*) syscalls.
86 * Fixed open mode flags decoding.
87 * Fixed corner cases in handling of strace -ff -ttt logs by strace-log-merge.
88 * Error counts that exceed one billion are now printed correctly in call
90 * Fixed call summary header for x32 personality.
91 * Changes of tracee personalities are reported more reliably.
92 * Fixed the case when strace attaches to a tracee being inside exec and its
93 first syscall stop is syscall-exit-stop instead of syscall-enter-stop,
94 which messed up all the syscall state tracking.
95 * Fixed printing of higher 32 bits of the return value for x32 personality.
98 * A C compiler that supports "for" loop initial declarations is now required.
99 * Inability to configure multiple personality support on architectures where
100 multiple personalities are supported leads to configuration failure during
101 build now. Use --enable-mpers=check to revert to the old behaviour.
102 * Build-time requirement for the mpers support has been lowered from gawk 4
104 * Removed incomplete and non-functional support for the CRIS architecture.
105 * Removed incomplete and unused support for IA-32 mode on the IA-64
108 Noteworthy changes in release 4.20 (2017-11-13)
109 ===============================================
112 * Implemented decoding of NETLINK_NETFILTER netlink message types and flags.
113 * Implemented decoding of SECCOMP_GET_ACTION_AVAIL operation of seccomp
115 * Updated lists of ARPHRD_*, BPF_*, ETH_P_*, LOOP_*, MADV_*,
116 MEMBARRIER_CMD_*, MFD_*, SECCOMP_*, SO_*, SOL_*, TCP_*, and UFFD_FEATURE_*
118 * Added decoding of statx syscall on hppa.
119 * Updated lists of ioctl commands from Linux 4.14.
122 * Fixed powerpc personality support on powerpc64.
124 Noteworthy changes in release 4.19 (2017-09-05)
125 ===============================================
127 * Changes in behaviour
128 * Changed formatting of personality names on tile architecture in order
129 to make it in line with other multi-personality architectures.
130 * Changed field output order in struct v4l2_requestbuffers to improve in/out
132 * Changed handling of multiple signal= specifications in an injection
133 expression: multiple specification now leads to error instead of implicit
134 usage the last specification.
137 * Enhanced decoding of optlen argument of getsockopt syscall.
138 * Enhanced decoding of SO_LINGER option of getsockopt and setsockopt syscalls.
139 * Enhanced decoding of SO_PEERCRED option of getsockopt syscall.
140 * Enhanced decoding of IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP,
141 IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_JOIN_ANYCAST,
142 IPV6_LEAVE_ANYCAST, MCAST_JOIN_GROUP, and MCAST_LEAVE_GROUP options
143 of setsockopt syscall.
144 * Enhanced decoding of KEYCTL_DH_COMPUTE operation of keyctl syscall
145 (KDF parameters decoding).
146 * Implemented decoding of KEYCTL_RESTRICT_KEYRING operation of keyctl syscall.
147 * Enhanced decoding of UFFDIO_API ioctl command.
148 * Enhanced decoding of BPF_PROG_LOAD, BPF_MAP_CREATE, BPF_MAP_LOOKUP_ELEM,
149 and BPF_MAP_GET_NEXT_KEY commands of bpf syscall.
150 * Implemented decoding of linux socket filter programs specified
151 for SO_ATTACH_FILTER and SO_ATTACH_REUSEPORT_CBPF socket options.
152 * Implemented decoding of inet_diag_req_v2, inet_diag_req_compat,
153 packet_diag_msg, and smc_diag_msg netlink attributes of NETLINK_SOCK_DIAG.
154 * Implemented NETLINK_SELINUX protocol specific decoding.
155 * Implemented decoding of netlink message ack flags.
156 * Implemented decoding of nlmsgerr netlink attributes.
157 * Implemented basic protocol specific decoding of NETLINK_CRYPTO.
158 * Implemented decoding of crypto_user_alg netlink attributes
160 * Implemented basic protocol specific decoding of addr, addrlabel, dcb, link,
161 mdb, neigh, neightbl, netconf, nsid, route, rule, tc, and tca messages
163 * Implemented decoding of NETLINK_KOBJECT_UEVENT messages.
164 * Improved handling of unexpected tracees (the ones that cloned with
165 CLONE_PARENT/CLONE_PTRACE or called PTRACE_TRACEME on themselves): they
166 are now PTRACE_DETACH'ed instead of PTRACE_CONT'ed.
167 * Updated lists of BPF_*, KEY_*, RWF_*, SCM_*, SO_*, and *_MAGIC constants.
168 * Added decoding of arch_prctl syscall on x86.
169 * Added decoding of seccomp, bpf, userfaultfd, membarrier, mlock2,
170 copy_file_range, preadv2, pwritev2, and statx on alpha.
171 * Added decoding of statx syscall on microblaze.
172 * Added decoding of s390_guarded_storage syscall on s390.
173 * Updated lists of ioctl commands from Linux 4.13.
174 * Enhanced manual page.
177 * Fixed printing of group_req structure on non-native personalities.
178 * Fixed output formatting of blkpg_ioctl_arg, dm_name_list, and iocb
180 * Fixed formatting of nul-terminated strings which have kernel-imposed size
182 * Fixed printing of paths that hit PATM_MAX limit in order to match kernel's
184 * Fixed build warnings on Android mips64.
185 * Fixed unused function "is_negated_errno" build warning when built
187 * Fixed syscall number and arguments retrieval behaviour on sparc64 and
188 mips o32 after prctl(PR_SET_DUMPABLE, 0) makes PTRACE_PEEKTEXT impossible
189 to use if Linux kernel has commit v4.10-rc1~114^2~2.
190 * Fixed path tracing for execveat, symlink, symlinkat, inotify_add_watch,
191 and inotify_init syscalls.
192 * Fixed personality switch printing on sparc64 and risc-v.
194 Noteworthy changes in release 4.18 (2017-07-05)
195 ===============================================
198 * Implemented decoding of SCM_TIMESTAMP* control messages.
199 * Implemented decoding of netlink NLMSG_DONE messages.
200 * Implemented decoding of netlink generic nlmsg_type and nlmsg_flags.
201 * Implemented decoding of NETLINK_AUDIT, NETLINK_NETFILTER, NETLINK_ROUTE,
202 NETLINK_SELINUX, NETLINK_SOCK_DIAG, and NETLINK_XFRM message types.
203 * Implemented decoding of NETLINK_GENERIC protocol families.
204 * Implemented basic protocol specific decoding of AF_INET, AF_INET6,
205 AF_NETLINK, AF_PACKET, AF_SMC, and AF_UNIX messages of NETLINK_SOCK_DIAG.
206 * Implemented basic decoding of netlink attributes.
207 * Implemented basic protocol specific decoding of AF_INET, AF_NETLINK,
208 AF_PACKET, AF_SMC, and AF_UNIX netlink attributes of NETLINK_SOCK_DIAG.
209 * Implemented decoding of inet_diag_msg, netlink_diag_msg, and unix_diag_msg
210 netlink attributes of NETLINK_SOCK_DIAG.
211 * Updated lists of ARPHRD_*, KEYCTL_*, NDIAG_SHOW_*, RTM_*, SCM_*, SCTP_*,
212 SO_*, V4L2_*, and prctl ARCH_* constants.
213 * Updated lists of ioctl commands from Linux 4.12.
216 * In interactive mode (-I2), those signals that were blocked at startup
217 will remain blocked for the whole period of strace execution.
218 * strace no longer resets SIGCHLD handler in tracees to the default action.
219 * When traced command is terminated by a blocked signal, strace unblocks
220 that signal to ensure its own termination with the same signal.
221 * Fixed corner cases in decoding of old sigaction syscall.
222 * Fixed build with old kernel headers on mips.
223 * Fixed build on aarch64 and tile with glibc >= 2.26.
224 * Fixed build on arc and nios2.
226 Noteworthy changes in release 4.17 (2017-05-24)
227 ===============================================
229 * Changes in command line syntax
230 * Syscall classes specified in -e trace= option now have % prefix (like
231 -e trace=%process). Old style class names without leading % are still
232 supported, but considered deprecated now.
235 * Optimized syscall filtering.
236 * Improved representation of timestamps.
237 * Enhanced decoding of sched_setattr syscall.
238 * Added -e trace=%stat option for tracing variants of stat syscall.
239 * Added -e trace=%lstat option for tracing variants of lstat syscall.
240 * Added -e trace=%fstat option for tracing variants of fstat and fstatat
242 * Added -e trace=%%stat option for tracing syscalls used for querying file
243 status information (stat, lstat, fstat, fstatat, statx, and their
245 * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs
247 * Added -e trace=%fstatfs option for tracing fstatfs, fstatfs64 and fstatvfs
249 * Added -e trace=%%statfs option for tracing syscalls used for querying file
250 system statistics information (statfs-like, fstatfs-like and ustat).
251 * Added -e trace=/regex option for filtering syscalls using regular
253 * Added support for prepending of question mark before syscall qualification
254 in -e trace expressions in order to suppress error in case no syscalls
255 matched the provided qualification.
256 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
257 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
258 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
260 * Implemented decoding of statx syscall.
261 * Implemented decoding of NS_* ioctl commands.
262 * Implemented decoding of the remaining V4L2_BUF_TYPE_* types.
263 * Implemented decoding of VIDIOC_[SG]_TUNER ioctl commands.
264 * Implemented decoding of NLMSG_ERROR netlink messages.
265 * Improved decoding of BPF_PROG_ATTACH command of bpf syscall.
266 * Improved decoding of misplaced parts in DM_* ioctl commands.
267 * Updated lists of ioctl commands from Linux 4.11.
270 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
271 * Fixed the number of arguments and tracing flags of alpha specific syscalls.
272 * Fixed decoding of old sigsuspend syscall on alpha, cris, mips, powerpc,
273 powerpc64, sh, sh64, sparc, and sparc64.
274 * Fixed decoding of sgetmask and ssetmask syscalls on 64-bit architectures.
275 * Fixed decoding of netlink messages received within struct msghdr.
276 * Worked around a bug in miscompiled aarch64 kernels leading to the 3rd
277 argument of sched_getattr syscall being not quite 32-bit.
278 * Fixed corner cases of printing inaccessible times argument of utimes
279 and futimesat syscalls.
281 Noteworthy changes in release 4.16 (2017-02-14)
282 ===============================================
285 * Implemented syscall return value injection (-e inject=SET:retval= option).
286 * Implemented signal injection (-e inject=SET:signal= option).
287 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
288 * Implemented decoding of all SG_* ioctl commands.
289 * Implemented decoding of ustat syscall.
290 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
291 and BPF_PROG_DETACH commands of bpf syscall.
292 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
293 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
295 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
296 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
297 * Updated lists of ioctl commands from Linux 4.10.
298 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
302 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
303 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
304 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
305 and pwritev* syscalls on x32.
306 * Fixed printing of string arguments of getxattr and setxattr syscalls
307 when -s option is used to limit the printed string size.
308 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
310 * Fixed decoding of SG_* and LOOP_* ioctl commands.
311 * Fixed build on mips with musl libc.
312 * Fixed cross-building of ioctlsort.
313 * Applied minor formatting fixes to the manual page.
315 Noteworthy changes in release 4.15 (2016-12-14)
316 ===============================================
318 * Changes in behavior
319 * Time stamps are now printed according to ISO 8601.
320 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
321 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
322 syscalls is now formatted as an array.
325 * Implemented syscall fault injection (-e fault=... option).
326 * Implemented decoding of DM_* ioctl commands.
327 * Implemented decoding of attr parameter of perf_event_open syscall.
328 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
329 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
330 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
332 * Implemented PTRACE_GETREGS API support on m68k.
333 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
334 and V4L2_* constants.
335 * Updated lists of ioctl commands from Linux 4.9.
336 * Added decoding of recently added syscalls on arc, x32, and xtensa.
337 * Enhanced manual page.
340 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
341 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
342 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
343 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
344 setgroups, setns, unshare, and utimes syscalls.
345 * Fixed handling of verbose flag in printing of controls array
346 of struct v4l2_ext_controls.
347 * Fixed omission of field names in the output of capability, sigaction,
348 sigevent, statfs, timespec, timeval, and utimbuf structures.
349 * Fixed printing of unknown syscalls in siginfo structure.
350 * Fixed decoding of ioctl constants on m68k.
351 * Fixed cris architecture support.
352 * Fixed cross build when host compiler does not support the same
353 set of warning flags as the cross compiler.
354 * Fixed build on SLE10 and SLE11.
356 Noteworthy changes in release 4.14 (2016-10-04)
357 ===============================================
359 * Changes in behavior
360 * When using -p option without a command and no processes has been attached,
361 strace exits with exit status 1.
364 * Added printing of the mode argument of open and openat syscalls
365 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
366 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
367 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
368 and aio family syscalls.
369 * Implemented fetching of the 7th subcall argument on mips o32.
370 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
372 * Updated lists of ioctl commands from Linux 4.8.
373 * Added decoding of new syscalls on sh and sh64.
374 * Added RISC-V architecture support.
377 * Marked io_setup and io_destroy as memory mapping related syscalls.
378 * Fixed leakage of placeholder descriptors to tracees.
379 * Fixed printing of mode_t, umode_t, and umask types.
380 * Fixed decoding of iovec arrays without a limit on total data size.
381 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
382 and ipc family syscalls.
383 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
384 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
386 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
387 * Fixed decoding of struct stat64 on sparc64.
388 * Fixed decoding of uid and gid-related syscalls on sparc64.
389 * Fixed decoding of the forth argument of semctl syscall on sparc64.
390 * Fixed values of tty ioctl constants on sparc64.
391 * Fixed sparc personality support on sparc64.
393 Noteworthy changes in release 4.13 (2016-07-26)
394 ===============================================
397 * Implemented a general netlink socket parser.
398 * Enhanced decoding of socket addresses.
399 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
400 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
401 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
402 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
403 and *_MAGIC constants.
404 * Updated lists of ioctl commands from Linux 4.7.
407 * Fixed decoding of pid_t argument of prlimit64 syscall.
408 * Fixed sign extension issues in the parser of struct rusage.
409 * Fixed race condition in decoding of timeout argument of recvmmsg and
410 rt_sigtimedwait syscalls.
411 * Fixed build with fresh linux kernel headers.
413 Noteworthy changes in release 4.12 (2016-05-31)
414 ===============================================
417 * Implemented simultaneous use of -p option and tracing of a command.
418 (addresses Debian bug #549942).
419 * Implemented caching of netlink conversations to reduce amount of time
420 spent in decoding socket details in -yy mode.
421 * Implemented -yy mode decoding of protocol:portid pairs associated with
422 netlink socket descriptors.
423 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
424 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
426 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
427 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
428 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
429 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
430 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
431 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
432 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
433 statfs64, tgkill, waitid, and xattr family syscalls.
434 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
435 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
436 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
437 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
438 * Added decoding of fadvise64 and fadvise64_64 on s390.
439 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
440 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
441 * Updated lists of ioctl commands from Linux 4.6.
444 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
445 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
446 * Fixed decoding of mlock2 syscall on sparc.
447 * Fixed decoding of osf_shmat syscall on alpha.
448 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
449 (addresses Debian bug #485979 and Fedora bug #1298294).
450 * Fixed decoding of preadv syscall in case of short read.
451 * Fixed decoding and dumping of readv syscall in case of short read.
452 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
453 * Fixed decoding of mincore syscall's last argument.
454 * Fixed remaining errors in mapping between syscall numbers and numbers
455 of syscall arguments.
456 * Applied various fixes to strace-graph script.
458 Noteworthy changes in release 4.11 (2015-12-21)
459 ===============================================
461 * Changes in behavior
462 * Some syscalls have different names depending on architecture and
463 personality. In these cases, syscall filtering and printing now
464 consistently uses the names that match corresponding __NR_* kernel
465 macros of the tracee's architecture and personality.
466 * Added strace prefix to all diagnostic messages.
469 * Enhanced and extended test suite.
470 * Implemented reliable tracing of processes whose personality differs
471 from the personality of strace, fixed decoding of 32-bit personality
472 syscalls on 64-bit architectures.
473 * When some data referenced by syscall arguments is irrelevant or cannot
474 be read from tracee's memory, strace now prints its address consistently.
475 * When a syscall is restarted using restart_syscall mechanism, strace now
476 shows the syscall name on architectures that expose this information.
477 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
478 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
479 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
480 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
481 * Optimized decoding of indirect socket syscalls.
482 * Implemented decoding of nanoseconds along with seconds in stat family
483 syscalls (addresses Fedora bug #1251176).
484 * Implemented decoding of struct statfs.f_flags in statfs syscall.
485 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
487 * Implemented decoding of indirect syscall on mips o32.
488 * Implemented decoding of IPPROTO_IP control messages.
489 * Implemented decoding of setsockopt syscall multicast arguments.
490 * Enhanced decoding of struct sigevent.
491 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
492 and v4l2 ioctl syscall arguments.
493 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
494 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
495 sendfile, setsockopt, and shmctl syscalls.
496 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
497 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
498 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
499 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
500 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
501 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
503 * Added Nios II architecture support.
504 * Added new syscall entries to match Linux 4.4.
507 * Fixed potential short read of strings from tracee's memory.
508 * Fixed -qq option in conjunction with -o option.
509 * Fixed filtering of <unavailable> syscalls.
510 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
511 with 64-bit aligned structures.
512 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
513 syscall flags arguments.
514 * Fixed decoding of 4th argument of clock_nanosleep syscall.
515 * Fixed decoding of getpagesize syscall on m68k.
516 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
517 * Fixed decoding of timezone argument of gettimeofday and settimeofday
519 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
521 * Fixed decoding of pipe syscall on alpha and mips.
522 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
523 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
524 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
526 * Fixed decoding of 4th argument of semctl indirect syscall.
527 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
528 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
529 * Fixed decoding of struct dirent on x32.
530 * Fixed decoding of times syscall return value on mips n32 and x32.
531 * Fixed decoding of path argument of umount2 syscall
532 (addresses Debian bug #785050).
533 * Worked around a kernel bug in tracing privileged executables.
534 * Fixed various errors in mapping between syscall numbers and associated
535 information like the number of syscall arguments, the name of syscall,
538 Noteworthy changes in release 4.10 (2015-03-06)
539 ===============================================
542 * Added -yy option to print protocol and address information associated with
544 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
545 recvmsg, sendmmsg, and recvmmsg syscalls.
546 * Implemented full 32-bit decoding of ioctl commands
547 (addresses Debian bug #692913 and Fedora bug #902788).
548 * Implemented PTRACE_GETREGS API support on ia64.
549 * Implemented PTRACE_GETREGS API support on mips.
550 * Implemented PTRACE_GETREGSET API support on s390/s390x.
551 * Implemented decoding of getrandom and seccomp syscalls.
552 * Implemented full decoding of 64-bit capability sets.
553 * Implemented decoding of all prctl commands.
554 * Implemented decoding of parametrized ioctl commands.
555 * Implemented decoding of evdev ioctl commands.
556 * Implemented decoding of v4l ioctl commands.
557 * Implemented decoding of SG_IO v4 ioctl commands.
558 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
559 * Implemented decoding of FALLOC_FL_* fallocate flags.
560 * Implemented decoding of rt_sigreturn signal mask on aarch64,
562 * Enhanced socket decoder to support bluetooth sockets.
563 * Enhanced decoding of unlisted ioctl commands.
564 * Enhanced decoding of getsockopt and setsockopt syscall.
565 * Enhanced decoding of sysinfo syscall.
566 * Enhanced decoding of struct cmsghdr.
567 * Enhanced decoding of wait status.
568 * Enhanced aio support on non-x86 architectures by using external libaio.h.
569 * Added O_TMPFILE to the list of recognized open mode flags.
570 * Updated the list of filesystem type constants that is used in decoding
571 statfs family syscalls.
572 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
574 * Updated lists of signal constants from Linux 3.19.
575 * Updated lists of errno constants from Linux 3.19.
576 * Updated lists of ioctl commands from Linux 3.9.
577 * Added new syscall entries to match Linux 3.19.
580 * Fixed various errors in mapping between syscall numbers and associated
581 information like the number of syscall arguments, the name of syscall,
583 * Fixed quoting issues in printing descriptors, filenames, network interface
584 names, struct utsname members, device/volume names of BLK* ioctl commands.
585 * Fixed uid_t/git_t decoding.
586 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
587 * Fixed potential open flags truncation on some architectures.
588 * Fixed decoding of struct ifreq.ifr_name.
589 * Fixed decoding of SIOCSIFNAME ioctl command.
590 * Fixed decoding of RENAME_* renameat2 flags.
591 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
592 * Fixed decoding of indirect ipc subcalls on some architectures.
593 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
594 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
595 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
596 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
597 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
598 sparc, sparc64, mips, and s390.
599 * Fixed instruction pointer output (-i option) on architectures that support
600 several personalities.
601 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
603 * Fixed build on systems where struct sigaction has no sa_restorer member.
604 * Fixed build with uclibc and musl libc.
607 * Linux kernel >= 2.5.46 is required.
608 Older versions without a decent PTRACE_SETOPTIONS support will not work.
609 * On mips, linux kernel >= 2.6.15 is required.
610 Older versions without a decent PTRACE_GETREGS support will not work.
611 * On s390 and s390x, linux kernel >= 2.6.27 is required.
612 Older versions without a decent PTRACE_GETREGSET support will not work.
614 Noteworthy changes in release 4.9 (2014-08-15)
615 ==============================================
617 * Changes in behavior
618 * Disabled OABI support on ARM EABI systems by default,
619 added --enable-arm-oabi option to enable it at configure time.
622 * Added experimental -k option to print stack trace after each traced syscall.
623 * Added -w option to produce stats on syscall latency.
624 (addresses Debian bug #457497).
625 * Added ARC architecture support.
626 * Added PTRACE_GETREGS API support on PowerPC.
627 * Enhanced Bionic libc and musl libc support.
628 * Enhanced tracing of x86 personality processes on x86_64 and x32.
629 * Enhanced tracing of ARM personality processes on AArch64.
630 * Enhanced 32/64bit personality detection on PowerPC.
631 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
632 renameat2, and request_key syscalls.
633 * Robustified decoding of select, pselect, and io_submit syscalls.
634 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
635 setdomainname, sethostname, setns, and sync_file_range syscalls.
636 * Enhanced decoding of signal bitmasks.
637 * Enhanced decoding of file descriptors.
638 * Enhanced siginfo_t decoding.
639 * Enhanced PF_NETLINK decoding.
640 * Updated CLOCK_* constants
641 (addresses Fedora bug #1088455).
642 * Added new syscall entries to match Linux 3.16.
645 * Added shmat and shmdt to the set of memory mapping related syscalls.
646 * Fixed detaching from stopped processes.
647 * Fixed fanotify_mark decoding on 32bit architectures.
648 * Fixed offset decoding in preadv and pwritev syscalls.
649 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
650 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
651 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
652 (addresses Fedora bug #993384).
653 * Miscellaneous corrections in the manual page.
654 (Addresses Debian bug #725987).
656 Noteworthy changes in release 4.8 (2013-06-03)
657 ==============================================
659 * Changes in behavior
660 * In case of normal strace termination, when the trace output is
661 redirected to a pipe, strace now closes it and waits for the pipe
662 process termination before exit.
665 * Implemented tracing using PTRACE_SEIZE API (when available).
666 * Implemented more reliable PTRACE_GETREGSET-based process personality
667 detection on x86-64 and x32 (when available).
668 * Added -e trace=memory option for tracing memory mapping related syscalls.
669 * Documented -b option.
670 * Allowed exit status messages to be suppressed by giving -q option twice.
671 * Added AArch64 architecture support
672 (addresses Debian bug #693074 and Fedora bug #969858).
673 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
674 * Added tilegx personality support for Tile.
675 * Enhanced support of NOMMU architectures.
676 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
678 * Added new syscall entries to match Linux 3.9.
679 * Regenerated the list of common ioctl names from Linux 3.9.
680 * Updated the list of errno constants.
681 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
682 PTRACE_O_*, and TCP_* constants.
683 * Implemented decoding of UBI ioctls.
684 * Removed redundant "*32" ioctl names.
687 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
688 (addresses Fedora bug #659382).
689 * Fixed kernel release string parsing
690 (addresses Debian bug #702309).
691 * Fixed decoding of *xattr syscalls
692 (addresses Fedora bug #885233).
693 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
694 (addresses Fedora bug #912790).
695 * Fixed tracing forks on SPARC.
696 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
697 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
698 and truncate64 syscalls.
699 * Fixed categories of multiple syscalls on most of supported architectures.
700 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
701 * Fixed decoding of multiple 32-bit personality syscalls on x32.
702 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
703 S390x, and Tile architectures.
704 * Fixed semtimedop decoding on S390x.
705 * Fixed sram_alloc decoding on Blackfin.
706 * Fixed build when process_vm_readv is a stab.
707 * Fixed build with older versions of libaio.h.
709 Noteworthy changes in release 4.7 (2012-05-02)
710 ==============================================
712 * Changes in behavior
713 * strace no longer suspends waitpid until there is a child
714 for waitpid'ing process to collect status from.
715 * strace no longer detaches from a tracee which is supposed
717 * strace now issues a new message: "+++ exited with EXITCODE +++"
718 which shows exact moment strace got exit notification,
719 analogous to existing "+++ killed by SIG +++" message.
722 * Added x32 personality support (x86_64 architecture).
723 * Added -y and -P options to print file descriptor paths and
724 filter by those paths.
725 * Added -I option to control strace interactivity.
726 * Allowed -p option to take comma or whitespace-separated list of PIDs.
727 * Added strace_log_merge script helper to merge timestamped "strace -ff"
729 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
730 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
731 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
732 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
733 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
734 listxattr, setrlimit and swapon syscalls.
735 * Implemented decoding of loop and mtd ioctls.
736 * Added syscall entries for new linux syscalls.
737 * Added syscall entries for direct socket system calls on powerpc.
738 * Updated the list of errno constants.
739 * Updated lists of MSG_*, STA_*, and TCP_* constants.
740 * Regenerated the list of ioctl names from Linux 3.3.
741 * Enhanced switching between processes with different personalities.
742 * Enhanced signals reporting by using short signal names.
743 * Made ERESTART* messages more descriptive.
744 * Made parsing of numbers from strings more robust.
745 * Added support for compat_statfs64 and statfs64.f_flags.
746 * Changed read of data blocks to use single process_vm_readv syscall
747 (when available) instead of several PTRACE_PEEKDATA operations.
748 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
749 operation instead of several PTRACE_PEEKUSER operations.
750 * Applied various optimizations to make strace work faster.
753 * Implemented proper handling of real SIGTRAPs on kernels supporting
754 PTRACE_O_TRACESYSGOOD.
755 (Addresses Fedora bug #162774).
756 * Fixed sockaddr_un.sun_path name in decoded output.
757 (Addresses Debian bug #554946).
758 * Fixed to avoid potential core file clobbering on exit.
759 (Addresses Debian bug #656398).
760 * Fixed a typo in documentation.
761 (Addresses Debian bug #653309).
762 * Fixed decoding of timer id returned by timer_create.
763 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
764 * Fixed *at syscalls flags decoding.
765 * Fixed ARM EABI 64-bit syscall's arguments decoding.
766 * Fixed semtimedop decoding on s390.
767 * Fixed osf_sigprocmask decoding on alpha.
768 * Fixed ipc and socket subcall decoding on several architectures.
769 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
770 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
771 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
772 * Corrected io_* syscall entries on ARM.
773 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
774 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
775 * Fixed build when libaio-devel is not available.
776 * Fixed configure checks for PTRACE_* constants.
777 * Fixed compilation warnings remained on several architectures.
780 * Removed all non-Linux code. After years of neglect, that dead code
781 just hampered further strace development.
782 * Linux kernel >= 2.6.18 is recommended. Older versions might still
783 work but they haven't been thoroughly tested with this release.
785 Noteworthy changes in release 4.6 (2011-03-15)
786 ==============================================
788 * Changes in behavior
789 * Print diagnostic information about changes in personality mode to
790 standard error instead of standard output.
793 * Implemented a new method of following clone, fork, and vfork
794 syscalls using the Linux kernel's explicit facilities for tracing
795 creation of threads and child processes.
796 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
797 * Implemented decoding of TLS syscalls on m68k.
798 * Implemented biarch support on powerpc64.
799 * Implemented biarch support for getrlimit() and setrlimit().
800 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
801 * Implemented SOL_SCTP socket options decoding.
802 * Added HDIO_* ioctl names.
803 (Addresses Debian bug #450953).
804 * Added LOOP_* ioctl names.
805 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
806 to match Linux 2.6.37.
807 * Updated the list of IPPROTO_* constants to match netinet/in.h.
808 * Implemented decoding of HDIO_* and BLK* ioctls.
809 * Added MicroBlaze architecture support.
810 * Added new syscall entries to match Linux 2.6.37.
811 * Regenerated list of ioctl names from Linux 2.6.37.
812 * Enhanced signal notification decoding.
813 * Documented -C and -D options.
816 * Fixed fetching syscall arguments on m68k.
817 * Fixed an error when judging whether a process has children.
818 * Fixed get/set_robust_list syscall numbers for powerpc.
819 * Fixed a corner case in printing clone flags.
820 * Fixed cross-compiling issues.
821 * Fixed build issues on powerpc64, SH and SPARC.
822 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
823 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
824 fanotify_init, and fanotify_mark syscalls.
825 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
826 * Fixed biarch support in IO dumping.
827 * Fixed raw exit_group decoding.
828 * Fixed decoding of file descriptors on 64-bit architectures.
829 * Fixed a corner case in waitpid handling.
830 (Addresses Red Hat bug #663547).
831 * Fixed stat64 decoding on mips
832 (Addresses Debian bug #599028).
833 * Fixed misleading italics in the manual page.
834 (Addresses Debian bug #589323).
836 Noteworthy changes in release 4.5.20 (2010-04-13)
837 =================================================
840 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
841 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
842 rt_tgsigqueueinfo, perf_event_open.
843 * Enhanced decoding of recently added syscalls on non-x86 architectures
844 by replacing a bare decoder with elaborate parsers enabled earlier
846 * Implemented -C option to combine regular and -c output.
847 (Addresses Debian bug #466196)
848 * Enhanced decoding of mbind and mremap syscalls.
849 * Enhanced SOL_PACKET socket options decoding.
850 * Regenerated list of ioctl names from linux 2.6.33.
851 * Added TILE architecture support.
854 * Fixed build with Linux kernel headers 2.6.32-rc5+.
855 (Addresses Debian bug #560516 and Fedora bug #539044)
856 * Fixed build on mips.
857 * Fixed handling of Linux systems without struct statfs64.
858 * Fixed reporting signal mask by sigreturn on powerpc.
859 * Fixed potential stack buffer overflow in select decoder.
860 (Addresses Fedora bug #556678)
861 * Corrected msgsnd indirect ipccall decoding.
862 * Corrected decoding of 64bit syscalls.
863 (Addresses Debian bug #570603)
864 * Corrected getsockopt decoding on architectures where
865 sizeof(long) > sizeof(int).
866 (Addresses Debian bug #494844)
867 * Corrected decoding of epoll_pwait.
868 (Addresses Debian bug #513014)
869 * Corrected handling of killed threads.
871 Noteworthy changes in release 4.5.19 (2009-10-21)
872 =================================================
874 * Changes in behavior
875 * When command exits, strace now exits with the same exit status.
876 If command is terminated by a signal, strace terminates itself
877 with the same signal, so that strace can be used as a wrapper
878 process transparent to the invoking parent process.
879 When using -p option, the exit status of strace is zero unless
880 there was an unexpected error in doing the tracing.
881 (Addresses Fedora bug #105371 and Debian bug #37665)
884 * Implemented decoding of new Linux syscalls: accept4, dup3,
885 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
886 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
887 * Implemented decoding of accept4 socketcall.
888 * Enhanced prctl decoding.
889 * Enhanced nanosleep decoding.
890 * Enhanced ptrace decoding.
891 * Enhanced futex decoding.
892 * Enhanced CAP_* decoding.
893 * Enhanced SIOCS* ioctls decoding.
894 * Enhanced fcntl F_* flags decoding.
895 * Enhanced semop/semtimedop decoding.
896 * Updated ARM architecture support.
897 * Added Blackfin architecture support.
898 * Added AVR32 architecture support.
899 * Added CRIS architecture support.
900 * Made strace detect when traced process suddenly disappeared.
903 * Fixed syscall numbers for tee and sync_file_range.
904 (Addresses Debian bug #503124)
905 * Fixed several bugs in strings decoder, including potential heap
907 (Addresses Fedora bugs #470529, #478324 and #511035)
908 * Marked sendfile(2) as a network syscall.
909 (Addresses Debian bug #509499)
910 * Fixed accept(2) decoding.
911 (Addresses Debian bug #507573)
912 * Fixed sigtimedwait(2) decoding.
913 * Fixed build on ARM EABI.
914 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
915 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
916 (Addresses Red Hat bug #471169)
917 * Fixed display of 32-bit argv array on 64-bit architectures.
918 (Addresses Fedora bug #519480)
919 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
920 * Fixed HPPA architecture support.
921 (Addresses Debian bugs #437928 and #546619)
926 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
927 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
932 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
933 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
934 * Improved output for prctl system call on Linux.
935 * Improved support for Linux/ARM.
936 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
941 * Improved output for delete_module, futex, and mbind system calls on Linux.
942 * Improved output for SG_IO ioctls on Linux.
943 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
944 eventfd, getcpu, epoll_pwait.
949 * Several biarch improvements.
950 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
951 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
956 * Accept numeric system calls in -e.
961 * Introduce "-e trace=desc".
966 * Better x86-64 support for IA32 processes.
967 * Update PowerPC system calls.
968 * Better printing for Linux aio system calls.
972 * Quick fix release for build issues.
973 * One fix for Linux/ARM system call table.
978 * Print fault address for SIGSEGV/SIGBUS signals when available.
983 * Improve socket ioctl printing.
984 * Update Linux/IA64 syscall list.
985 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
986 * Improve mount flags printing.
987 * Support symbolic printing of x86_64 arch_prctl parameters.
992 * Update syscall tables for Alpha, ARM, HPPA.
993 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
994 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
995 * Improve ioctl command name matching.
996 * Print RTC_* ioctl structure contents.
997 * Support newer RLIMIT_* values.
998 * Print struct cmsghdr details in sendmsg.
1003 * Print attribute values in *xattr system calls on Linux.
1004 * Include pread and pwrite calls in -e read and -e write tracing.
1005 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
1006 * Print clock_t values symbolically in Linux clock_* system calls.
1010 * Bug fixes, Linux ioctl updates.
1011 * David Miller contributed support for Linux/SPARC64.
1019 * Update Linux ioctl lists.
1020 * Update PF_* and AF_* value lists.
1021 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
1026 * On Linux using NPTL threads, -p will now attach to all threads in a process.
1027 * Handle new mq_* system calls in Linux 2.6.6 and later.
1032 * Report some new VM_* bit values on Linux.
1033 * Better output for Linux sched_* system calls.
1038 * Display multiple ioctl name matches on Linux.
1042 * New port to AMD's x86-64 architecture. One strace binary can
1043 handle both new x86-64 and old i386 processes.
1044 * Fixed support for LFS64 calls.
1045 * New switch -E to add/remove environment variables for the command.
1046 * Merged s390/s390x port.
1047 * Trace an unbounded number of processes.
1048 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
1049 * Fixed bugs with attach/detach leaving things stopped.
1050 * Fixed traced process seeing ECHILD despite live, traced children
1051 in waitpid calls with WNOHANG.
1052 * Stuart Menefy contributed a port to Linux/SH.
1053 * Stephen Thomas contributed a port to Linux/SH64.
1054 * Many other bug fixes.
1058 * Fix Linux/ia64 support, looks like someone renamed a few things on us
1059 * Fix the ioctl setup for Linux, turned out it did not really work.
1060 Improve the ioctl extractor as well so we decode some more ones.
1064 * compile fixes for Linux/mips
1068 * Linux ia64 and hppa ports added
1069 * The usual Linux syscall updates (includes 32bit uid/gid support),
1070 * Linux ioctl list updated
1071 * Support IPv6 scope ids
1072 * FreeBSD/i386 port added
1073 * UnixWare and Solaris updates
1074 * Better support for tracing multithreaded processes in Linux
1078 * Compiles on glibc2.0 systems again
1079 * Linux/S390 port added
1080 * The usual Linux syscall updates
1081 * we can follow fork on arm now
1085 * Linux/MIPS port added
1086 * Lots of Linux updates again
1087 * Improved IPv6 support
1093 * Compiles on glibc2.0 systems again
1097 * Get stat structure properly on Linux 64bit archs
1098 * Personalities work again
1099 * Compile correctly on SunOS again
1105 * Linux (ultra)sparc fixes
1112 * add support for more Linux architectures (powerpc, sparc, arm)
1113 * support lots more Linux syscalls
1114 * fix signal handling
1115 * add IPX and IPIP support
1116 * check stray syscall after execv
1117 * fix hanging children
1119 Changes in version 3.1
1120 ======================
1122 * Irix5 is supported
1123 * Linux 68k is supported
1124 * Linux alpha is supported
1125 * configure is upgraded to autoconf 2.x
1126 * using -f in combination with -e now works correctly
1127 * output can be piped to a program
1128 * tracing setuid programs works better
1129 * it is now reasonable to install strace setuid to root in some circumstances
1130 * new useful tracing names like file and process to trace whole
1131 classes of system calls, e.g. -efile traces all system calls that
1132 take a file name as an argument
1133 * IPC calls on SunOS 4.1.x are decoded
1134 * Linux program memory is reliably dereferenced
1135 * Linux decodes at least the name of all syscalls as of pre2.0.4
1136 * various cosmetic changes and bug fixes
1138 Changes from versions 2.x to version 3.0
1139 ========================================
1141 * filename arguments are neither abbreviated nor stringified
1142 * string arguments are now true C strings using octal instead of hex by default
1143 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
1144 * by default the output for multiple processes now goes into one file
1145 * all structures, vectors, bitsets, etc. use consistent output formats
1146 * the -c option now means count calls, -i does what the old -c used to do
1148 New Features in version 3.0
1149 ===========================
1151 * non-ascii strings can be optionally printed entirely in hex
1152 * the output format is readable when multiple processes are generating output
1153 * exit values are printed in an alignment column
1154 * is is possible to suppress messages about attaching and detaching
1155 * various tracing features can be enabled on a per syscall/signal/desc basis
1156 * selective tracing of syscalls
1157 * selective printing of syscall structures
1158 * selective abbreviation of long structures on a per syscall basis
1159 * selective printing of raw syscall arguments and results
1160 * selective tracing of signals
1161 * selective dumping of all I/O read from file descriptors
1162 * selective dumping of all I/O written to file descriptors
1163 * optional counting of time, calls, and errors for each syscall