1 Noteworthy changes in release ?.?? (????-??-??)
2 ===============================================
4 * Changes in infrastructure
5 * The mailing list was moved to strace-devel@lists.strace.io.
8 * Closing angle bracket is now printed as an octal number escape sequence
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 NETLINK_ROUTE protocol decoding.
15 * Updated lists of signal codes.
16 * Updated lists of INET_DIAG_BC_*, POLL*, RWF_*, and SCHED_FLAG_* constants.
19 * Fixed build on m68k.
21 Noteworthy changes in release 4.21 (2018-02-13)
22 ===============================================
24 * Changes in behaviour
25 * Warning is now issued when -F option is used.
26 * Warning is now issued when a tracee with unsupported personality
28 * Unknown syscall numbers are now printed in hexadecimal form.
31 * Implemented decoding of netlink descriptor attributes as file descriptors.
32 * Implemented decoding of hugetlb page size selection flags.
33 * Implemented decoding of BPF_PROG_TEST_RUN, BPF_PROG_GET_NEXT_ID,
34 BPF_MAP_GET_NEXT_ID, BPF_PROG_GET_FD_BY_ID, BPF_MAP_GET_FD_BY_ID,
35 and BPF_OBJ_GET_INFO_BY_FD commands of bpf syscall.
36 * Enhanced decoding of get_thread_area, memfd_create, modify_ldt,
37 perf_event_open, reboot, s390_guarded_storage, s390_pcio_mmio_read,
38 s390_pci_mmio_write, s390_runtime_instr, s390_sthyi, set_thread_area,
40 * Implemented decoding of KVM_* and DM_LIST_DEVICES ioctl commands.
41 * Implemented decoding of riscv_flush_icache syscall.
42 * Enhanced decoding of getsockopt and setsockopt syscalls for SOL_NETLINK
44 * Enhanced decoding of BPF_MAP_CREATE command of bpf syscall.
45 * Print values returned by mq_open syscall and first arguments
46 of mq_getsetattr, mq_notify, mq_timedreceive, and mq_timedsend syscalls
48 * Added decoding of get_tls syscall on arm.
49 * Added -e trace=%pure option for tracing system calls with no arguments that
51 * Updated lists of IPV6_*, MAP_*, MEMBARRIER_CMD_*, MSG_*, NT_*, PKEY_*,
52 SHM_*, and TCP_* constants.
53 * Added manual page for the strace-log-merge command.
54 * Updated lists of ioctl commands from Linux 4.15.
55 * Implemented biarch support for s390x.
56 * Implemented an optional support for symbol demangling in strace -k output
57 (activated by --with-libiberty configure option).
58 * Information about availability of demangling and reliable personality
59 decoding (on architectures with multiple personalities) is now available
61 * Added decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls on
62 powerpc and powerpc64.
63 * Enhanced manual page.
66 * Fixed multi-personality support in cross builds.
67 * Added mq_getsetattr, mq_notify, mq_open, mq_timedreceive, and mq_timedsend
68 syscalls to %desc tracing set.
69 * Fixed path tracing support for mmap syscalls with indirect arguments and
70 for old select syscall.
71 * Fixed decoding of arm-specific (__ARM_NR_*) syscalls.
72 * Fixed open mode flags decoding.
73 * Fixed corner cases in handling of strace -ff -ttt logs by strace-log-merge.
74 * Error counts that exceed one billion are now printed correctly in call
76 * Fixed call summary header for x32 personality.
77 * Changes of tracee personalities are reported more reliably.
78 * Fixed the case when strace attaches to a tracee being inside exec and its
79 first syscall stop is syscall-exit-stop instead of syscall-enter-stop,
80 which messed up all the syscall state tracking.
81 * Fixed printing of higher 32 bits of the return value for x32 personality.
84 * A C compiler that supports "for" loop initial declarations is now required.
85 * Inability to configure multiple personality support on architectures where
86 multiple personalities are supported leads to configuration failure during
87 build now. Use --enable-mpers=check to revert to the old behaviour.
88 * Build-time requirement for the mpers support has been lowered from gawk 4
90 * Removed incomplete and non-functional support for the CRIS architecture.
91 * Removed incomplete and unused support for IA-32 mode on the IA-64
94 Noteworthy changes in release 4.20 (2017-11-13)
95 ===============================================
98 * Implemented decoding of NETLINK_NETFILTER netlink message types and flags.
99 * Implemented decoding of SECCOMP_GET_ACTION_AVAIL operation of seccomp
101 * Updated lists of ARPHRD_*, BPF_*, ETH_P_*, LOOP_*, MADV_*,
102 MEMBARRIER_CMD_*, MFD_*, SECCOMP_*, SO_*, SOL_*, TCP_*, and UFFD_FEATURE_*
104 * Added decoding of statx syscall on hppa.
105 * Updated lists of ioctl commands from Linux 4.14.
108 * Fixed powerpc personality support on powerpc64.
110 Noteworthy changes in release 4.19 (2017-09-05)
111 ===============================================
113 * Changes in behaviour
114 * Changed formatting of personality names on tile architecture in order
115 to make it in line with other multi-personality architectures.
116 * Changed field output order in struct v4l2_requestbuffers to improve in/out
118 * Changed handling of multiple signal= specifications in an injection
119 expression: multiple specification now leads to error instead of implicit
120 usage the last specification.
123 * Enhanced decoding of optlen argument of getsockopt syscall.
124 * Enhanced decoding of SO_LINGER option of getsockopt and setsockopt syscalls.
125 * Enhanced decoding of SO_PEERCRED option of getsockopt syscall.
126 * Enhanced decoding of IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP,
127 IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_JOIN_ANYCAST,
128 IPV6_LEAVE_ANYCAST, MCAST_JOIN_GROUP, and MCAST_LEAVE_GROUP options
129 of setsockopt syscall.
130 * Enhanced decoding of KEYCTL_DH_COMPUTE operation of keyctl syscall
131 (KDF parameters decoding).
132 * Implemented decoding of KEYCTL_RESTRICT_KEYRING operation of keyctl syscall.
133 * Enhanced decoding of UFFDIO_API ioctl command.
134 * Enhanced decoding of BPF_PROG_LOAD, BPF_MAP_CREATE, BPF_MAP_LOOKUP_ELEM,
135 and BPF_MAP_GET_NEXT_KEY commands of bpf syscall.
136 * Implemented decoding of linux socket filter programs specified
137 for SO_ATTACH_FILTER and SO_ATTACH_REUSEPORT_CBPF socket options.
138 * Implemented decoding of inet_diag_req_v2, inet_diag_req_compat,
139 packet_diag_msg, and smc_diag_msg netlink attributes of NETLINK_SOCK_DIAG.
140 * Implemented NETLINK_SELINUX protocol specific decoding.
141 * Implemented decoding of netlink message ack flags.
142 * Implemented decoding of nlmsgerr netlink attributes.
143 * Implemented basic protocol specific decoding of NETLINK_CRYPTO.
144 * Implemented decoding of crypto_user_alg netlink attributes
146 * Implemented basic protocol specific decoding of addr, addrlabel, dcb, link,
147 mdb, neigh, neightbl, netconf, nsid, route, rule, tc, and tca messages
149 * Implemented decoding of NETLINK_KOBJECT_UEVENT messages.
150 * Improved handling of unexpected tracees (the ones that cloned with
151 CLONE_PARENT/CLONE_PTRACE or called PTRACE_TRACEME on themselves): they
152 are now PTRACE_DETACH'ed instead of PTRACE_CONT'ed.
153 * Updated lists of BPF_*, KEY_*, RWF_*, SCM_*, SO_*, and *_MAGIC constants.
154 * Added decoding of arch_prctl syscall on x86.
155 * Added decoding of seccomp, bpf, userfaultfd, membarrier, mlock2,
156 copy_file_range, preadv2, pwritev2, and statx on alpha.
157 * Added decoding of statx syscall on microblaze.
158 * Added decoding of s390_guarded_storage syscall on s390.
159 * Updated lists of ioctl commands from Linux 4.13.
160 * Enhanced manual page.
163 * Fixed printing of group_req structure on non-native personalities.
164 * Fixed output formatting of blkpg_ioctl_arg, dm_name_list, and iocb
166 * Fixed formatting of nul-terminated strings which have kernel-imposed size
168 * Fixed printing of paths that hit PATM_MAX limit in order to match kernel's
170 * Fixed build warnings on Android mips64.
171 * Fixed unused function "is_negated_errno" build warning when built
173 * Fixed syscall number and arguments retrieval behaviour on sparc64 and
174 mips o32 after prctl(PR_SET_DUMPABLE, 0) makes PTRACE_PEEKTEXT impossible
175 to use if Linux kernel has commit v4.10-rc1~114^2~2.
176 * Fixed path tracing for execveat, symlink, symlinkat, inotify_add_watch,
177 and inotify_init syscalls.
178 * Fixed personality switch printing on sparc64 and risc-v.
180 Noteworthy changes in release 4.18 (2017-07-05)
181 ===============================================
184 * Implemented decoding of SCM_TIMESTAMP* control messages.
185 * Implemented decoding of netlink NLMSG_DONE messages.
186 * Implemented decoding of netlink generic nlmsg_type and nlmsg_flags.
187 * Implemented decoding of NETLINK_AUDIT, NETLINK_NETFILTER, NETLINK_ROUTE,
188 NETLINK_SELINUX, NETLINK_SOCK_DIAG, and NETLINK_XFRM message types.
189 * Implemented decoding of NETLINK_GENERIC protocol families.
190 * Implemented basic protocol specific decoding of AF_INET, AF_INET6,
191 AF_NETLINK, AF_PACKET, AF_SMC, and AF_UNIX messages of NETLINK_SOCK_DIAG.
192 * Implemented basic decoding of netlink attributes.
193 * Implemented basic protocol specific decoding of AF_INET, AF_NETLINK,
194 AF_PACKET, AF_SMC, and AF_UNIX netlink attributes of NETLINK_SOCK_DIAG.
195 * Implemented decoding of inet_diag_msg, netlink_diag_msg, and unix_diag_msg
196 netlink attributes of NETLINK_SOCK_DIAG.
197 * Updated lists of ARPHRD_*, KEYCTL_*, NDIAG_SHOW_*, RTM_*, SCM_*, SCTP_*,
198 SO_*, V4L2_*, and prctl ARCH_* constants.
199 * Updated lists of ioctl commands from Linux 4.12.
202 * In interactive mode (-I2), those signals that were blocked at startup
203 will remain blocked for the whole period of strace execution.
204 * strace no longer resets SIGCHLD handler in tracees to the default action.
205 * When traced command is terminated by a blocked signal, strace unblocks
206 that signal to ensure its own termination with the same signal.
207 * Fixed corner cases in decoding of old sigaction syscall.
208 * Fixed build with old kernel headers on mips.
209 * Fixed build on aarch64 and tile with glibc >= 2.26.
210 * Fixed build on arc and nios2.
212 Noteworthy changes in release 4.17 (2017-05-24)
213 ===============================================
215 * Changes in command line syntax
216 * Syscall classes specified in -e trace= option now have % prefix (like
217 -e trace=%process). Old style class names without leading % are still
218 supported, but considered deprecated now.
221 * Optimized syscall filtering.
222 * Improved representation of timestamps.
223 * Enhanced decoding of sched_setattr syscall.
224 * Added -e trace=%stat option for tracing variants of stat syscall.
225 * Added -e trace=%lstat option for tracing variants of lstat syscall.
226 * Added -e trace=%fstat option for tracing variants of fstat and fstatat
228 * Added -e trace=%%stat option for tracing syscalls used for querying file
229 status information (stat, lstat, fstat, fstatat, statx, and their
231 * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs
233 * Added -e trace=%fstatfs option for tracing fstatfs, fstatfs64 and fstatvfs
235 * Added -e trace=%%statfs option for tracing syscalls used for querying file
236 system statistics information (statfs-like, fstatfs-like and ustat).
237 * Added -e trace=/regex option for filtering syscalls using regular
239 * Added support for prepending of question mark before syscall qualification
240 in -e trace expressions in order to suppress error in case no syscalls
241 matched the provided qualification.
242 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
243 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
244 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
246 * Implemented decoding of statx syscall.
247 * Implemented decoding of NS_* ioctl commands.
248 * Implemented decoding of the remaining V4L2_BUF_TYPE_* types.
249 * Implemented decoding of VIDIOC_[SG]_TUNER ioctl commands.
250 * Implemented decoding of NLMSG_ERROR netlink messages.
251 * Improved decoding of BPF_PROG_ATTACH command of bpf syscall.
252 * Improved decoding of misplaced parts in DM_* ioctl commands.
253 * Updated lists of ioctl commands from Linux 4.11.
256 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
257 * Fixed the number of arguments and tracing flags of alpha specific syscalls.
258 * Fixed decoding of old sigsuspend syscall on alpha, cris, mips, powerpc,
259 powerpc64, sh, sh64, sparc, and sparc64.
260 * Fixed decoding of sgetmask and ssetmask syscalls on 64-bit architectures.
261 * Fixed decoding of netlink messages received within struct msghdr.
262 * Worked around a bug in miscompiled aarch64 kernels leading to the 3rd
263 argument of sched_getattr syscall being not quite 32-bit.
264 * Fixed corner cases of printing inaccessible times argument of utimes
265 and futimesat syscalls.
267 Noteworthy changes in release 4.16 (2017-02-14)
268 ===============================================
271 * Implemented syscall return value injection (-e inject=SET:retval= option).
272 * Implemented signal injection (-e inject=SET:signal= option).
273 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
274 * Implemented decoding of all SG_* ioctl commands.
275 * Implemented decoding of ustat syscall.
276 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
277 and BPF_PROG_DETACH commands of bpf syscall.
278 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
279 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
281 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
282 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
283 * Updated lists of ioctl commands from Linux 4.10.
284 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
288 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
289 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
290 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
291 and pwritev* syscalls on x32.
292 * Fixed printing of string arguments of getxattr and setxattr syscalls
293 when -s option is used to limit the printed string size.
294 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
296 * Fixed decoding of SG_* and LOOP_* ioctl commands.
297 * Fixed build on mips with musl libc.
298 * Fixed cross-building of ioctlsort.
299 * Applied minor formatting fixes to the manual page.
301 Noteworthy changes in release 4.15 (2016-12-14)
302 ===============================================
304 * Changes in behavior
305 * Time stamps are now printed according to ISO 8601.
306 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
307 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
308 syscalls is now formatted as an array.
311 * Implemented syscall fault injection (-e fault=... option).
312 * Implemented decoding of DM_* ioctl commands.
313 * Implemented decoding of attr parameter of perf_event_open syscall.
314 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
315 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
316 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
318 * Implemented PTRACE_GETREGS API support on m68k.
319 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
320 and V4L2_* constants.
321 * Updated lists of ioctl commands from Linux 4.9.
322 * Added decoding of recently added syscalls on arc, x32, and xtensa.
323 * Enhanced manual page.
326 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
327 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
328 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
329 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
330 setgroups, setns, unshare, and utimes syscalls.
331 * Fixed handling of verbose flag in printing of controls array
332 of struct v4l2_ext_controls.
333 * Fixed omission of field names in the output of capability, sigaction,
334 sigevent, statfs, timespec, timeval, and utimbuf structures.
335 * Fixed printing of unknown syscalls in siginfo structure.
336 * Fixed decoding of ioctl constants on m68k.
337 * Fixed cris architecture support.
338 * Fixed cross build when host compiler does not support the same
339 set of warning flags as the cross compiler.
340 * Fixed build on SLE10 and SLE11.
342 Noteworthy changes in release 4.14 (2016-10-04)
343 ===============================================
345 * Changes in behavior
346 * When using -p option without a command and no processes has been attached,
347 strace exits with exit status 1.
350 * Added printing of the mode argument of open and openat syscalls
351 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
352 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
353 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
354 and aio family syscalls.
355 * Implemented fetching of the 7th subcall argument on mips o32.
356 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
358 * Updated lists of ioctl commands from Linux 4.8.
359 * Added decoding of new syscalls on sh and sh64.
360 * Added RISC-V architecture support.
363 * Marked io_setup and io_destroy as memory mapping related syscalls.
364 * Fixed leakage of placeholder descriptors to tracees.
365 * Fixed printing of mode_t, umode_t, and umask types.
366 * Fixed decoding of iovec arrays without a limit on total data size.
367 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
368 and ipc family syscalls.
369 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
370 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
372 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
373 * Fixed decoding of struct stat64 on sparc64.
374 * Fixed decoding of uid and gid-related syscalls on sparc64.
375 * Fixed decoding of the forth argument of semctl syscall on sparc64.
376 * Fixed values of tty ioctl constants on sparc64.
377 * Fixed sparc personality support on sparc64.
379 Noteworthy changes in release 4.13 (2016-07-26)
380 ===============================================
383 * Implemented a general netlink socket parser.
384 * Enhanced decoding of socket addresses.
385 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
386 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
387 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
388 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
389 and *_MAGIC constants.
390 * Updated lists of ioctl commands from Linux 4.7.
393 * Fixed decoding of pid_t argument of prlimit64 syscall.
394 * Fixed sign extension issues in the parser of struct rusage.
395 * Fixed race condition in decoding of timeout argument of recvmmsg and
396 rt_sigtimedwait syscalls.
397 * Fixed build with fresh linux kernel headers.
399 Noteworthy changes in release 4.12 (2016-05-31)
400 ===============================================
403 * Implemented simultaneous use of -p option and tracing of a command.
404 (addresses Debian bug #549942).
405 * Implemented caching of netlink conversations to reduce amount of time
406 spent in decoding socket details in -yy mode.
407 * Implemented -yy mode decoding of protocol:portid pairs associated with
408 netlink socket descriptors.
409 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
410 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
412 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
413 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
414 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
415 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
416 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
417 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
418 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
419 statfs64, tgkill, waitid, and xattr family syscalls.
420 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
421 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
422 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
423 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
424 * Added decoding of fadvise64 and fadvise64_64 on s390.
425 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
426 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
427 * Updated lists of ioctl commands from Linux 4.6.
430 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
431 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
432 * Fixed decoding of mlock2 syscall on sparc.
433 * Fixed decoding of osf_shmat syscall on alpha.
434 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
435 (addresses Debian bug #485979 and Fedora bug #1298294).
436 * Fixed decoding of preadv syscall in case of short read.
437 * Fixed decoding and dumping of readv syscall in case of short read.
438 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
439 * Fixed decoding of mincore syscall's last argument.
440 * Fixed remaining errors in mapping between syscall numbers and numbers
441 of syscall arguments.
442 * Applied various fixes to strace-graph script.
444 Noteworthy changes in release 4.11 (2015-12-21)
445 ===============================================
447 * Changes in behavior
448 * Some syscalls have different names depending on architecture and
449 personality. In these cases, syscall filtering and printing now
450 consistently uses the names that match corresponding __NR_* kernel
451 macros of the tracee's architecture and personality.
452 * Added strace prefix to all diagnostic messages.
455 * Enhanced and extended test suite.
456 * Implemented reliable tracing of processes whose personality differs
457 from the personality of strace, fixed decoding of 32-bit personality
458 syscalls on 64-bit architectures.
459 * When some data referenced by syscall arguments is irrelevant or cannot
460 be read from tracee's memory, strace now prints its address consistently.
461 * When a syscall is restarted using restart_syscall mechanism, strace now
462 shows the syscall name on architectures that expose this information.
463 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
464 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
465 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
466 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
467 * Optimized decoding of indirect socket syscalls.
468 * Implemented decoding of nanoseconds along with seconds in stat family
469 syscalls (addresses Fedora bug #1251176).
470 * Implemented decoding of struct statfs.f_flags in statfs syscall.
471 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
473 * Implemented decoding of indirect syscall on mips o32.
474 * Implemented decoding of IPPROTO_IP control messages.
475 * Implemented decoding of setsockopt syscall multicast arguments.
476 * Enhanced decoding of struct sigevent.
477 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
478 and v4l2 ioctl syscall arguments.
479 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
480 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
481 sendfile, setsockopt, and shmctl syscalls.
482 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
483 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
484 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
485 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
486 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
487 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
489 * Added Nios II architecture support.
490 * Added new syscall entries to match Linux 4.4.
493 * Fixed potential short read of strings from tracee's memory.
494 * Fixed -qq option in conjunction with -o option.
495 * Fixed filtering of <unavailable> syscalls.
496 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
497 with 64-bit aligned structures.
498 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
499 syscall flags arguments.
500 * Fixed decoding of 4th argument of clock_nanosleep syscall.
501 * Fixed decoding of getpagesize syscall on m68k.
502 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
503 * Fixed decoding of timezone argument of gettimeofday and settimeofday
505 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
507 * Fixed decoding of pipe syscall on alpha and mips.
508 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
509 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
510 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
512 * Fixed decoding of 4th argument of semctl indirect syscall.
513 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
514 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
515 * Fixed decoding of struct dirent on x32.
516 * Fixed decoding of times syscall return value on mips n32 and x32.
517 * Fixed decoding of path argument of umount2 syscall
518 (addresses Debian bug #785050).
519 * Worked around a kernel bug in tracing privileged executables.
520 * Fixed various errors in mapping between syscall numbers and associated
521 information like the number of syscall arguments, the name of syscall,
524 Noteworthy changes in release 4.10 (2015-03-06)
525 ===============================================
528 * Added -yy option to print protocol and address information associated with
530 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
531 recvmsg, sendmmsg, and recvmmsg syscalls.
532 * Implemented full 32-bit decoding of ioctl commands
533 (addresses Debian bug #692913 and Fedora bug #902788).
534 * Implemented PTRACE_GETREGS API support on ia64.
535 * Implemented PTRACE_GETREGS API support on mips.
536 * Implemented PTRACE_GETREGSET API support on s390/s390x.
537 * Implemented decoding of getrandom and seccomp syscalls.
538 * Implemented full decoding of 64-bit capability sets.
539 * Implemented decoding of all prctl commands.
540 * Implemented decoding of parametrized ioctl commands.
541 * Implemented decoding of evdev ioctl commands.
542 * Implemented decoding of v4l ioctl commands.
543 * Implemented decoding of SG_IO v4 ioctl commands.
544 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
545 * Implemented decoding of FALLOC_FL_* fallocate flags.
546 * Implemented decoding of rt_sigreturn signal mask on aarch64,
548 * Enhanced socket decoder to support bluetooth sockets.
549 * Enhanced decoding of unlisted ioctl commands.
550 * Enhanced decoding of getsockopt and setsockopt syscall.
551 * Enhanced decoding of sysinfo syscall.
552 * Enhanced decoding of struct cmsghdr.
553 * Enhanced decoding of wait status.
554 * Enhanced aio support on non-x86 architectures by using external libaio.h.
555 * Added O_TMPFILE to the list of recognized open mode flags.
556 * Updated the list of filesystem type constants that is used in decoding
557 statfs family syscalls.
558 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
560 * Updated lists of signal constants from Linux 3.19.
561 * Updated lists of errno constants from Linux 3.19.
562 * Updated lists of ioctl commands from Linux 3.9.
563 * Added new syscall entries to match Linux 3.19.
566 * Fixed various errors in mapping between syscall numbers and associated
567 information like the number of syscall arguments, the name of syscall,
569 * Fixed quoting issues in printing descriptors, filenames, network interface
570 names, struct utsname members, device/volume names of BLK* ioctl commands.
571 * Fixed uid_t/git_t decoding.
572 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
573 * Fixed potential open flags truncation on some architectures.
574 * Fixed decoding of struct ifreq.ifr_name.
575 * Fixed decoding of SIOCSIFNAME ioctl command.
576 * Fixed decoding of RENAME_* renameat2 flags.
577 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
578 * Fixed decoding of indirect ipc subcalls on some architectures.
579 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
580 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
581 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
582 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
583 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
584 sparc, sparc64, mips, and s390.
585 * Fixed instruction pointer output (-i option) on architectures that support
586 several personalities.
587 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
589 * Fixed build on systems where struct sigaction has no sa_restorer member.
590 * Fixed build with uclibc and musl libc.
593 * Linux kernel >= 2.5.46 is required.
594 Older versions without a decent PTRACE_SETOPTIONS support will not work.
595 * On mips, linux kernel >= 2.6.15 is required.
596 Older versions without a decent PTRACE_GETREGS support will not work.
597 * On s390 and s390x, linux kernel >= 2.6.27 is required.
598 Older versions without a decent PTRACE_GETREGSET support will not work.
600 Noteworthy changes in release 4.9 (2014-08-15)
601 ==============================================
603 * Changes in behavior
604 * Disabled OABI support on ARM EABI systems by default,
605 added --enable-arm-oabi option to enable it at configure time.
608 * Added experimental -k option to print stack trace after each traced syscall.
609 * Added -w option to produce stats on syscall latency.
610 (addresses Debian bug #457497).
611 * Added ARC architecture support.
612 * Added PTRACE_GETREGS API support on PowerPC.
613 * Enhanced Bionic libc and musl libc support.
614 * Enhanced tracing of x86 personality processes on x86_64 and x32.
615 * Enhanced tracing of ARM personality processes on AArch64.
616 * Enhanced 32/64bit personality detection on PowerPC.
617 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
618 renameat2, and request_key syscalls.
619 * Robustified decoding of select, pselect, and io_submit syscalls.
620 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
621 setdomainname, sethostname, setns, and sync_file_range syscalls.
622 * Enhanced decoding of signal bitmasks.
623 * Enhanced decoding of file descriptors.
624 * Enhanced siginfo_t decoding.
625 * Enhanced PF_NETLINK decoding.
626 * Updated CLOCK_* constants
627 (addresses Fedora bug #1088455).
628 * Added new syscall entries to match Linux 3.16.
631 * Added shmat and shmdt to the set of memory mapping related syscalls.
632 * Fixed detaching from stopped processes.
633 * Fixed fanotify_mark decoding on 32bit architectures.
634 * Fixed offset decoding in preadv and pwritev syscalls.
635 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
636 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
637 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
638 (addresses Fedora bug #993384).
639 * Miscellaneous corrections in the manual page.
640 (Addresses Debian bug #725987).
642 Noteworthy changes in release 4.8 (2013-06-03)
643 ==============================================
645 * Changes in behavior
646 * In case of normal strace termination, when the trace output is
647 redirected to a pipe, strace now closes it and waits for the pipe
648 process termination before exit.
651 * Implemented tracing using PTRACE_SEIZE API (when available).
652 * Implemented more reliable PTRACE_GETREGSET-based process personality
653 detection on x86-64 and x32 (when available).
654 * Added -e trace=memory option for tracing memory mapping related syscalls.
655 * Documented -b option.
656 * Allowed exit status messages to be suppressed by giving -q option twice.
657 * Added AArch64 architecture support
658 (addresses Debian bug #693074 and Fedora bug #969858).
659 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
660 * Added tilegx personality support for Tile.
661 * Enhanced support of NOMMU architectures.
662 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
664 * Added new syscall entries to match Linux 3.9.
665 * Regenerated the list of common ioctl names from Linux 3.9.
666 * Updated the list of errno constants.
667 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
668 PTRACE_O_*, and TCP_* constants.
669 * Implemented decoding of UBI ioctls.
670 * Removed redundant "*32" ioctl names.
673 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
674 (addresses Fedora bug #659382).
675 * Fixed kernel release string parsing
676 (addresses Debian bug #702309).
677 * Fixed decoding of *xattr syscalls
678 (addresses Fedora bug #885233).
679 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
680 (addresses Fedora bug #912790).
681 * Fixed tracing forks on SPARC.
682 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
683 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
684 and truncate64 syscalls.
685 * Fixed categories of multiple syscalls on most of supported architectures.
686 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
687 * Fixed decoding of multiple 32-bit personality syscalls on x32.
688 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
689 S390x, and Tile architectures.
690 * Fixed semtimedop decoding on S390x.
691 * Fixed sram_alloc decoding on Blackfin.
692 * Fixed build when process_vm_readv is a stab.
693 * Fixed build with older versions of libaio.h.
695 Noteworthy changes in release 4.7 (2012-05-02)
696 ==============================================
698 * Changes in behavior
699 * strace no longer suspends waitpid until there is a child
700 for waitpid'ing process to collect status from.
701 * strace no longer detaches from a tracee which is supposed
703 * strace now issues a new message: "+++ exited with EXITCODE +++"
704 which shows exact moment strace got exit notification,
705 analogous to existing "+++ killed by SIG +++" message.
708 * Added x32 personality support (x86_64 architecture).
709 * Added -y and -P options to print file descriptor paths and
710 filter by those paths.
711 * Added -I option to control strace interactivity.
712 * Allowed -p option to take comma or whitespace-separated list of PIDs.
713 * Added strace_log_merge script helper to merge timestamped "strace -ff"
715 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
716 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
717 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
718 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
719 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
720 listxattr, setrlimit and swapon syscalls.
721 * Implemented decoding of loop and mtd ioctls.
722 * Added syscall entries for new linux syscalls.
723 * Added syscall entries for direct socket system calls on powerpc.
724 * Updated the list of errno constants.
725 * Updated lists of MSG_*, STA_*, and TCP_* constants.
726 * Regenerated the list of ioctl names from Linux 3.3.
727 * Enhanced switching between processes with different personalities.
728 * Enhanced signals reporting by using short signal names.
729 * Made ERESTART* messages more descriptive.
730 * Made parsing of numbers from strings more robust.
731 * Added support for compat_statfs64 and statfs64.f_flags.
732 * Changed read of data blocks to use single process_vm_readv syscall
733 (when available) instead of several PTRACE_PEEKDATA operations.
734 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
735 operation instead of several PTRACE_PEEKUSER operations.
736 * Applied various optimizations to make strace work faster.
739 * Implemented proper handling of real SIGTRAPs on kernels supporting
740 PTRACE_O_TRACESYSGOOD.
741 (Addresses Fedora bug #162774).
742 * Fixed sockaddr_un.sun_path name in decoded output.
743 (Addresses Debian bug #554946).
744 * Fixed to avoid potential core file clobbering on exit.
745 (Addresses Debian bug #656398).
746 * Fixed a typo in documentation.
747 (Addresses Debian bug #653309).
748 * Fixed decoding of timer id returned by timer_create.
749 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
750 * Fixed *at syscalls flags decoding.
751 * Fixed ARM EABI 64-bit syscall's arguments decoding.
752 * Fixed semtimedop decoding on s390.
753 * Fixed osf_sigprocmask decoding on alpha.
754 * Fixed ipc and socket subcall decoding on several architectures.
755 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
756 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
757 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
758 * Corrected io_* syscall entries on ARM.
759 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
760 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
761 * Fixed build when libaio-devel is not available.
762 * Fixed configure checks for PTRACE_* constants.
763 * Fixed compilation warnings remained on several architectures.
766 * Removed all non-Linux code. After years of neglect, that dead code
767 just hampered further strace development.
768 * Linux kernel >= 2.6.18 is recommended. Older versions might still
769 work but they haven't been thoroughly tested with this release.
771 Noteworthy changes in release 4.6 (2011-03-15)
772 ==============================================
774 * Changes in behavior
775 * Print diagnostic information about changes in personality mode to
776 standard error instead of standard output.
779 * Implemented a new method of following clone, fork, and vfork
780 syscalls using the Linux kernel's explicit facilities for tracing
781 creation of threads and child processes.
782 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
783 * Implemented decoding of TLS syscalls on m68k.
784 * Implemented biarch support on powerpc64.
785 * Implemented biarch support for getrlimit() and setrlimit().
786 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
787 * Implemented SOL_SCTP socket options decoding.
788 * Added HDIO_* ioctl names.
789 (Addresses Debian bug #450953).
790 * Added LOOP_* ioctl names.
791 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
792 to match Linux 2.6.37.
793 * Updated the list of IPPROTO_* constants to match netinet/in.h.
794 * Implemented decoding of HDIO_* and BLK* ioctls.
795 * Added MicroBlaze architecture support.
796 * Added new syscall entries to match Linux 2.6.37.
797 * Regenerated list of ioctl names from Linux 2.6.37.
798 * Enhanced signal notification decoding.
799 * Documented -C and -D options.
802 * Fixed fetching syscall arguments on m68k.
803 * Fixed an error when judging whether a process has children.
804 * Fixed get/set_robust_list syscall numbers for powerpc.
805 * Fixed a corner case in printing clone flags.
806 * Fixed cross-compiling issues.
807 * Fixed build issues on powerpc64, SH and SPARC.
808 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
809 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
810 fanotify_init, and fanotify_mark syscalls.
811 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
812 * Fixed biarch support in IO dumping.
813 * Fixed raw exit_group decoding.
814 * Fixed decoding of file descriptors on 64-bit architectures.
815 * Fixed a corner case in waitpid handling.
816 (Addresses Red Hat bug #663547).
817 * Fixed stat64 decoding on mips
818 (Addresses Debian bug #599028).
819 * Fixed misleading italics in the manual page.
820 (Addresses Debian bug #589323).
822 Noteworthy changes in release 4.5.20 (2010-04-13)
823 =================================================
826 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
827 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
828 rt_tgsigqueueinfo, perf_event_open.
829 * Enhanced decoding of recently added syscalls on non-x86 architectures
830 by replacing a bare decoder with elaborate parsers enabled earlier
832 * Implemented -C option to combine regular and -c output.
833 (Addresses Debian bug #466196)
834 * Enhanced decoding of mbind and mremap syscalls.
835 * Enhanced SOL_PACKET socket options decoding.
836 * Regenerated list of ioctl names from linux 2.6.33.
837 * Added TILE architecture support.
840 * Fixed build with Linux kernel headers 2.6.32-rc5+.
841 (Addresses Debian bug #560516 and Fedora bug #539044)
842 * Fixed build on mips.
843 * Fixed handling of Linux systems without struct statfs64.
844 * Fixed reporting signal mask by sigreturn on powerpc.
845 * Fixed potential stack buffer overflow in select decoder.
846 (Addresses Fedora bug #556678)
847 * Corrected msgsnd indirect ipccall decoding.
848 * Corrected decoding of 64bit syscalls.
849 (Addresses Debian bug #570603)
850 * Corrected getsockopt decoding on architectures where
851 sizeof(long) > sizeof(int).
852 (Addresses Debian bug #494844)
853 * Corrected decoding of epoll_pwait.
854 (Addresses Debian bug #513014)
855 * Corrected handling of killed threads.
857 Noteworthy changes in release 4.5.19 (2009-10-21)
858 =================================================
860 * Changes in behavior
861 * When command exits, strace now exits with the same exit status.
862 If command is terminated by a signal, strace terminates itself
863 with the same signal, so that strace can be used as a wrapper
864 process transparent to the invoking parent process.
865 When using -p option, the exit status of strace is zero unless
866 there was an unexpected error in doing the tracing.
867 (Addresses Fedora bug #105371 and Debian bug #37665)
870 * Implemented decoding of new Linux syscalls: accept4, dup3,
871 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
872 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
873 * Implemented decoding of accept4 socketcall.
874 * Enhanced prctl decoding.
875 * Enhanced nanosleep decoding.
876 * Enhanced ptrace decoding.
877 * Enhanced futex decoding.
878 * Enhanced CAP_* decoding.
879 * Enhanced SIOCS* ioctls decoding.
880 * Enhanced fcntl F_* flags decoding.
881 * Enhanced semop/semtimedop decoding.
882 * Updated ARM architecture support.
883 * Added Blackfin architecture support.
884 * Added AVR32 architecture support.
885 * Added CRIS architecture support.
886 * Made strace detect when traced process suddenly disappeared.
889 * Fixed syscall numbers for tee and sync_file_range.
890 (Addresses Debian bug #503124)
891 * Fixed several bugs in strings decoder, including potential heap
893 (Addresses Fedora bugs #470529, #478324 and #511035)
894 * Marked sendfile(2) as a network syscall.
895 (Addresses Debian bug #509499)
896 * Fixed accept(2) decoding.
897 (Addresses Debian bug #507573)
898 * Fixed sigtimedwait(2) decoding.
899 * Fixed build on ARM EABI.
900 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
901 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
902 (Addresses Red Hat bug #471169)
903 * Fixed display of 32-bit argv array on 64-bit architectures.
904 (Addresses Fedora bug #519480)
905 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
906 * Fixed HPPA architecture support.
907 (Addresses Debian bugs #437928 and #546619)
912 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
913 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
918 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
919 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
920 * Improved output for prctl system call on Linux.
921 * Improved support for Linux/ARM.
922 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
927 * Improved output for delete_module, futex, and mbind system calls on Linux.
928 * Improved output for SG_IO ioctls on Linux.
929 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
930 eventfd, getcpu, epoll_pwait.
935 * Several biarch improvements.
936 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
937 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
942 * Accept numeric system calls in -e.
947 * Introduce "-e trace=desc".
952 * Better x86-64 support for IA32 processes.
953 * Update PowerPC system calls.
954 * Better printing for Linux aio system calls.
958 * Quick fix release for build issues.
959 * One fix for Linux/ARM system call table.
964 * Print fault address for SIGSEGV/SIGBUS signals when available.
969 * Improve socket ioctl printing.
970 * Update Linux/IA64 syscall list.
971 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
972 * Improve mount flags printing.
973 * Support symbolic printing of x86_64 arch_prctl parameters.
978 * Update syscall tables for Alpha, ARM, HPPA.
979 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
980 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
981 * Improve ioctl command name matching.
982 * Print RTC_* ioctl structure contents.
983 * Support newer RLIMIT_* values.
984 * Print struct cmsghdr details in sendmsg.
989 * Print attribute values in *xattr system calls on Linux.
990 * Include pread and pwrite calls in -e read and -e write tracing.
991 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
992 * Print clock_t values symbolically in Linux clock_* system calls.
996 * Bug fixes, Linux ioctl updates.
997 * David Miller contributed support for Linux/SPARC64.
1005 * Update Linux ioctl lists.
1006 * Update PF_* and AF_* value lists.
1007 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
1012 * On Linux using NPTL threads, -p will now attach to all threads in a process.
1013 * Handle new mq_* system calls in Linux 2.6.6 and later.
1018 * Report some new VM_* bit values on Linux.
1019 * Better output for Linux sched_* system calls.
1024 * Display multiple ioctl name matches on Linux.
1028 * New port to AMD's x86-64 architecture. One strace binary can
1029 handle both new x86-64 and old i386 processes.
1030 * Fixed support for LFS64 calls.
1031 * New switch -E to add/remove environment variables for the command.
1032 * Merged s390/s390x port.
1033 * Trace an unbounded number of processes.
1034 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
1035 * Fixed bugs with attach/detach leaving things stopped.
1036 * Fixed traced process seeing ECHILD despite live, traced children
1037 in waitpid calls with WNOHANG.
1038 * Stuart Menefy contributed a port to Linux/SH.
1039 * Stephen Thomas contributed a port to Linux/SH64.
1040 * Many other bug fixes.
1044 * Fix Linux/ia64 support, looks like someone renamed a few things on us
1045 * Fix the ioctl setup for Linux, turned out it did not really work.
1046 Improve the ioctl extractor as well so we decode some more ones.
1050 * compile fixes for Linux/mips
1054 * Linux ia64 and hppa ports added
1055 * The usual Linux syscall updates (includes 32bit uid/gid support),
1056 * Linux ioctl list updated
1057 * Support IPv6 scope ids
1058 * FreeBSD/i386 port added
1059 * UnixWare and Solaris updates
1060 * Better support for tracing multithreaded processes in Linux
1064 * Compiles on glibc2.0 systems again
1065 * Linux/S390 port added
1066 * The usual Linux syscall updates
1067 * we can follow fork on arm now
1071 * Linux/MIPS port added
1072 * Lots of Linux updates again
1073 * Improved IPv6 support
1079 * Compiles on glibc2.0 systems again
1083 * Get stat structure properly on Linux 64bit archs
1084 * Personalities work again
1085 * Compile correctly on SunOS again
1091 * Linux (ultra)sparc fixes
1098 * add support for more Linux architectures (powerpc, sparc, arm)
1099 * support lots more Linux syscalls
1100 * fix signal handling
1101 * add IPX and IPIP support
1102 * check stray syscall after execv
1103 * fix hanging children
1105 Changes in version 3.1
1106 ======================
1108 * Irix5 is supported
1109 * Linux 68k is supported
1110 * Linux alpha is supported
1111 * configure is upgraded to autoconf 2.x
1112 * using -f in combination with -e now works correctly
1113 * output can be piped to a program
1114 * tracing setuid programs works better
1115 * it is now reasonable to install strace setuid to root in some circumstances
1116 * new useful tracing names like file and process to trace whole
1117 classes of system calls, e.g. -efile traces all system calls that
1118 take a file name as an argument
1119 * IPC calls on SunOS 4.1.x are decoded
1120 * Linux program memory is reliably dereferenced
1121 * Linux decodes at least the name of all syscalls as of pre2.0.4
1122 * various cosmetic changes and bug fixes
1124 Changes from versions 2.x to version 3.0
1125 ========================================
1127 * filename arguments are neither abbreviated nor stringified
1128 * string arguments are now true C strings using octal instead of hex by default
1129 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
1130 * by default the output for multiple processes now goes into one file
1131 * all structures, vectors, bitsets, etc. use consistent output formats
1132 * the -c option now means count calls, -i does what the old -c used to do
1134 New Features in version 3.0
1135 ===========================
1137 * non-ascii strings can be optionally printed entirely in hex
1138 * the output format is readable when multiple processes are generating output
1139 * exit values are printed in an alignment column
1140 * is is possible to suppress messages about attaching and detaching
1141 * various tracing features can be enabled on a per syscall/signal/desc basis
1142 * selective tracing of syscalls
1143 * selective printing of syscall structures
1144 * selective abbreviation of long structures on a per syscall basis
1145 * selective printing of raw syscall arguments and results
1146 * selective tracing of signals
1147 * selective dumping of all I/O read from file descriptors
1148 * selective dumping of all I/O written to file descriptors
1149 * optional counting of time, calls, and errors for each syscall