1 Noteworthy changes in release ?.?? (????-??-??)
2 ===============================================
4 * Changes in infrastructure
5 * The mailing list was moved to strace-devel@lists.strace.io.
8 * IPv6 addresses shown in socket information in -yy mode are now printed
12 * Fixed build on m68k.
14 Noteworthy changes in release 4.21 (2018-02-13)
15 ===============================================
17 * Changes in behaviour
18 * Warning is now issued when -F option is used.
19 * Warning is now issued when a tracee with unsupported personality
21 * Unknown syscall numbers are now printed in hexadecimal form.
24 * Implemented decoding of netlink descriptor attributes as file descriptors.
25 * Implemented decoding of hugetlb page size selection flags.
26 * Implemented decoding of BPF_PROG_TEST_RUN, BPF_PROG_GET_NEXT_ID,
27 BPF_MAP_GET_NEXT_ID, BPF_PROG_GET_FD_BY_ID, BPF_MAP_GET_FD_BY_ID,
28 and BPF_OBJ_GET_INFO_BY_FD commands of bpf syscall.
29 * Enhanced decoding of get_thread_area, memfd_create, modify_ldt,
30 perf_event_open, reboot, s390_guarded_storage, s390_pcio_mmio_read,
31 s390_pci_mmio_write, s390_runtime_instr, s390_sthyi, set_thread_area,
33 * Implemented decoding of KVM_* and DM_LIST_DEVICES ioctl commands.
34 * Implemented decoding of riscv_flush_icache syscall.
35 * Enhanced decoding of getsockopt and setsockopt syscalls for SOL_NETLINK
37 * Enhanced decoding of BPF_MAP_CREATE command of bpf syscall.
38 * Print values returned by mq_open syscall and first arguments
39 of mq_getsetattr, mq_notify, mq_timedreceive, and mq_timedsend syscalls
41 * Added decoding of get_tls syscall on arm.
42 * Added -e trace=%pure option for tracing system calls with no arguments that
44 * Updated lists of IPV6_*, MAP_*, MEMBARRIER_CMD_*, MSG_*, NT_*, PKEY_*,
45 SHM_*, and TCP_* constants.
46 * Added manual page for the strace-log-merge command.
47 * Updated lists of ioctl commands from Linux 4.15.
48 * Implemented biarch support for s390x.
49 * Implemented an optional support for symbol demangling in strace -k output
50 (activated by --with-libiberty configure option).
51 * Information about availability of demangling and reliable personality
52 decoding (on architectures with multiple personalities) is now available
54 * Added decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls on
55 powerpc and powerpc64.
56 * Enhanced manual page.
59 * Fixed multi-personality support in cross builds.
60 * Added mq_getsetattr, mq_notify, mq_open, mq_timedreceive, and mq_timedsend
61 syscalls to %desc tracing set.
62 * Fixed path tracing support for mmap syscalls with indirect arguments and
63 for old select syscall.
64 * Fixed decoding of arm-specific (__ARM_NR_*) syscalls.
65 * Fixed open mode flags decoding.
66 * Fixed corner cases in handling of strace -ff -ttt logs by strace-log-merge.
67 * Error counts that exceed one billion are now printed correctly in call
69 * Fixed call summary header for x32 personality.
70 * Changes of tracee personalities are reported more reliably.
71 * Fixed the case when strace attaches to a tracee being inside exec and its
72 first syscall stop is syscall-exit-stop instead of syscall-enter-stop,
73 which messed up all the syscall state tracking.
74 * Fixed printing of higher 32 bits of the return value for x32 personality.
77 * A C compiler that supports "for" loop initial declarations is now required.
78 * Inability to configure multiple personality support on architectures where
79 multiple personalities are supported leads to configuration failure during
80 build now. Use --enable-mpers=check to revert to the old behaviour.
81 * Build-time requirement for the mpers support has been lowered from gawk 4
83 * Removed incomplete and non-functional support for the CRIS architecture.
84 * Removed incomplete and unused support for IA-32 mode on the IA-64
87 Noteworthy changes in release 4.20 (2017-11-13)
88 ===============================================
91 * Implemented decoding of NETLINK_NETFILTER netlink message types and flags.
92 * Implemented decoding of SECCOMP_GET_ACTION_AVAIL operation of seccomp
94 * Updated lists of ARPHRD_*, BPF_*, ETH_P_*, LOOP_*, MADV_*,
95 MEMBARRIER_CMD_*, MFD_*, SECCOMP_*, SO_*, SOL_*, TCP_*, and UFFD_FEATURE_*
97 * Added decoding of statx syscall on hppa.
98 * Updated lists of ioctl commands from Linux 4.14.
101 * Fixed powerpc personality support on powerpc64.
103 Noteworthy changes in release 4.19 (2017-09-05)
104 ===============================================
106 * Changes in behaviour
107 * Changed formatting of personality names on tile architecture in order
108 to make it in line with other multi-personality architectures.
109 * Changed field output order in struct v4l2_requestbuffers to improve in/out
111 * Changed handling of multiple signal= specifications in an injection
112 expression: multiple specification now leads to error instead of implicit
113 usage the last specification.
116 * Enhanced decoding of optlen argument of getsockopt syscall.
117 * Enhanced decoding of SO_LINGER option of getsockopt and setsockopt syscalls.
118 * Enhanced decoding of SO_PEERCRED option of getsockopt syscall.
119 * Enhanced decoding of IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP,
120 IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_JOIN_ANYCAST,
121 IPV6_LEAVE_ANYCAST, MCAST_JOIN_GROUP, and MCAST_LEAVE_GROUP options
122 of setsockopt syscall.
123 * Enhanced decoding of KEYCTL_DH_COMPUTE operation of keyctl syscall
124 (KDF parameters decoding).
125 * Implemented decoding of KEYCTL_RESTRICT_KEYRING operation of keyctl syscall.
126 * Enhanced decoding of UFFDIO_API ioctl command.
127 * Enhanced decoding of BPF_PROG_LOAD, BPF_MAP_CREATE, BPF_MAP_LOOKUP_ELEM,
128 and BPF_MAP_GET_NEXT_KEY commands of bpf syscall.
129 * Implemented decoding of linux socket filter programs specified
130 for SO_ATTACH_FILTER and SO_ATTACH_REUSEPORT_CBPF socket options.
131 * Implemented decoding of inet_diag_req_v2, inet_diag_req_compat,
132 packet_diag_msg, and smc_diag_msg netlink attributes of NETLINK_SOCK_DIAG.
133 * Implemented NETLINK_SELINUX protocol specific decoding.
134 * Implemented decoding of netlink message ack flags.
135 * Implemented decoding of nlmsgerr netlink attributes.
136 * Implemented basic protocol specific decoding of NETLINK_CRYPTO.
137 * Implemented decoding of crypto_user_alg netlink attributes
139 * Implemented basic protocol specific decoding of addr, addrlabel, dcb, link,
140 mdb, neigh, neightbl, netconf, nsid, route, rule, tc, and tca messages
142 * Implemented decoding of NETLINK_KOBJECT_UEVENT messages.
143 * Improved handling of unexpected tracees (the ones that cloned with
144 CLONE_PARENT/CLONE_PTRACE or called PTRACE_TRACEME on themselves): they
145 are now PTRACE_DETACH'ed instead of PTRACE_CONT'ed.
146 * Updated lists of BPF_*, KEY_*, RWF_*, SCM_*, SO_*, and *_MAGIC constants.
147 * Added decoding of arch_prctl syscall on x86.
148 * Added decoding of seccomp, bpf, userfaultfd, membarrier, mlock2,
149 copy_file_range, preadv2, pwritev2, and statx on alpha.
150 * Added decoding of statx syscall on microblaze.
151 * Added decoding of s390_guarded_storage syscall on s390.
152 * Updated lists of ioctl commands from Linux 4.13.
153 * Enhanced manual page.
156 * Fixed printing of group_req structure on non-native personalities.
157 * Fixed output formatting of blkpg_ioctl_arg, dm_name_list, and iocb
159 * Fixed formatting of nul-terminated strings which have kernel-imposed size
161 * Fixed printing of paths that hit PATM_MAX limit in order to match kernel's
163 * Fixed build warnings on Android mips64.
164 * Fixed unused function "is_negated_errno" build warning when built
166 * Fixed syscall number and arguments retrieval behaviour on sparc64 and
167 mips o32 after prctl(PR_SET_DUMPABLE, 0) makes PTRACE_PEEKTEXT impossible
168 to use if Linux kernel has commit v4.10-rc1~114^2~2.
169 * Fixed path tracing for execveat, symlink, symlinkat, inotify_add_watch,
170 and inotify_init syscalls.
171 * Fixed personality switch printing on sparc64 and risc-v.
173 Noteworthy changes in release 4.18 (2017-07-05)
174 ===============================================
177 * Implemented decoding of SCM_TIMESTAMP* control messages.
178 * Implemented decoding of netlink NLMSG_DONE messages.
179 * Implemented decoding of netlink generic nlmsg_type and nlmsg_flags.
180 * Implemented decoding of NETLINK_AUDIT, NETLINK_NETFILTER, NETLINK_ROUTE,
181 NETLINK_SELINUX, NETLINK_SOCK_DIAG, and NETLINK_XFRM message types.
182 * Implemented decoding of NETLINK_GENERIC protocol families.
183 * Implemented basic protocol specific decoding of AF_INET, AF_INET6,
184 AF_NETLINK, AF_PACKET, AF_SMC, and AF_UNIX messages of NETLINK_SOCK_DIAG.
185 * Implemented basic decoding of netlink attributes.
186 * Implemented basic protocol specific decoding of AF_INET, AF_NETLINK,
187 AF_PACKET, AF_SMC, and AF_UNIX netlink attributes of NETLINK_SOCK_DIAG.
188 * Implemented decoding of inet_diag_msg, netlink_diag_msg, and unix_diag_msg
189 netlink attributes of NETLINK_SOCK_DIAG.
190 * Updated lists of ARPHRD_*, KEYCTL_*, NDIAG_SHOW_*, RTM_*, SCM_*, SCTP_*,
191 SO_*, V4L2_*, and prctl ARCH_* constants.
192 * Updated lists of ioctl commands from Linux 4.12.
195 * In interactive mode (-I2), those signals that were blocked at startup
196 will remain blocked for the whole period of strace execution.
197 * strace no longer resets SIGCHLD handler in tracees to the default action.
198 * When traced command is terminated by a blocked signal, strace unblocks
199 that signal to ensure its own termination with the same signal.
200 * Fixed corner cases in decoding of old sigaction syscall.
201 * Fixed build with old kernel headers on mips.
202 * Fixed build on aarch64 and tile with glibc >= 2.26.
203 * Fixed build on arc and nios2.
205 Noteworthy changes in release 4.17 (2017-05-24)
206 ===============================================
208 * Changes in command line syntax
209 * Syscall classes specified in -e trace= option now have % prefix (like
210 -e trace=%process). Old style class names without leading % are still
211 supported, but considered deprecated now.
214 * Optimized syscall filtering.
215 * Improved representation of timestamps.
216 * Enhanced decoding of sched_setattr syscall.
217 * Added -e trace=%stat option for tracing variants of stat syscall.
218 * Added -e trace=%lstat option for tracing variants of lstat syscall.
219 * Added -e trace=%fstat option for tracing variants of fstat and fstatat
221 * Added -e trace=%%stat option for tracing syscalls used for querying file
222 status information (stat, lstat, fstat, fstatat, statx, and their
224 * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs
226 * Added -e trace=%fstatfs option for tracing fstatfs, fstatfs64 and fstatvfs
228 * Added -e trace=%%statfs option for tracing syscalls used for querying file
229 system statistics information (statfs-like, fstatfs-like and ustat).
230 * Added -e trace=/regex option for filtering syscalls using regular
232 * Added support for prepending of question mark before syscall qualification
233 in -e trace expressions in order to suppress error in case no syscalls
234 matched the provided qualification.
235 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
236 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
237 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
239 * Implemented decoding of statx syscall.
240 * Implemented decoding of NS_* ioctl commands.
241 * Implemented decoding of the remaining V4L2_BUF_TYPE_* types.
242 * Implemented decoding of VIDIOC_[SG]_TUNER ioctl commands.
243 * Implemented decoding of NLMSG_ERROR netlink messages.
244 * Improved decoding of BPF_PROG_ATTACH command of bpf syscall.
245 * Improved decoding of misplaced parts in DM_* ioctl commands.
246 * Updated lists of ioctl commands from Linux 4.11.
249 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
250 * Fixed the number of arguments and tracing flags of alpha specific syscalls.
251 * Fixed decoding of old sigsuspend syscall on alpha, cris, mips, powerpc,
252 powerpc64, sh, sh64, sparc, and sparc64.
253 * Fixed decoding of sgetmask and ssetmask syscalls on 64-bit architectures.
254 * Fixed decoding of netlink messages received within struct msghdr.
255 * Worked around a bug in miscompiled aarch64 kernels leading to the 3rd
256 argument of sched_getattr syscall being not quite 32-bit.
257 * Fixed corner cases of printing inaccessible times argument of utimes
258 and futimesat syscalls.
260 Noteworthy changes in release 4.16 (2017-02-14)
261 ===============================================
264 * Implemented syscall return value injection (-e inject=SET:retval= option).
265 * Implemented signal injection (-e inject=SET:signal= option).
266 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
267 * Implemented decoding of all SG_* ioctl commands.
268 * Implemented decoding of ustat syscall.
269 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
270 and BPF_PROG_DETACH commands of bpf syscall.
271 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
272 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
274 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
275 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
276 * Updated lists of ioctl commands from Linux 4.10.
277 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
281 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
282 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
283 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
284 and pwritev* syscalls on x32.
285 * Fixed printing of string arguments of getxattr and setxattr syscalls
286 when -s option is used to limit the printed string size.
287 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
289 * Fixed decoding of SG_* and LOOP_* ioctl commands.
290 * Fixed build on mips with musl libc.
291 * Fixed cross-building of ioctlsort.
292 * Applied minor formatting fixes to the manual page.
294 Noteworthy changes in release 4.15 (2016-12-14)
295 ===============================================
297 * Changes in behavior
298 * Time stamps are now printed according to ISO 8601.
299 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
300 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
301 syscalls is now formatted as an array.
304 * Implemented syscall fault injection (-e fault=... option).
305 * Implemented decoding of DM_* ioctl commands.
306 * Implemented decoding of attr parameter of perf_event_open syscall.
307 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
308 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
309 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
311 * Implemented PTRACE_GETREGS API support on m68k.
312 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
313 and V4L2_* constants.
314 * Updated lists of ioctl commands from Linux 4.9.
315 * Added decoding of recently added syscalls on arc, x32, and xtensa.
316 * Enhanced manual page.
319 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
320 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
321 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
322 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
323 setgroups, setns, unshare, and utimes syscalls.
324 * Fixed handling of verbose flag in printing of controls array
325 of struct v4l2_ext_controls.
326 * Fixed omission of field names in the output of capability, sigaction,
327 sigevent, statfs, timespec, timeval, and utimbuf structures.
328 * Fixed printing of unknown syscalls in siginfo structure.
329 * Fixed decoding of ioctl constants on m68k.
330 * Fixed cris architecture support.
331 * Fixed cross build when host compiler does not support the same
332 set of warning flags as the cross compiler.
333 * Fixed build on SLE10 and SLE11.
335 Noteworthy changes in release 4.14 (2016-10-04)
336 ===============================================
338 * Changes in behavior
339 * When using -p option without a command and no processes has been attached,
340 strace exits with exit status 1.
343 * Added printing of the mode argument of open and openat syscalls
344 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
345 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
346 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
347 and aio family syscalls.
348 * Implemented fetching of the 7th subcall argument on mips o32.
349 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
351 * Updated lists of ioctl commands from Linux 4.8.
352 * Added decoding of new syscalls on sh and sh64.
353 * Added RISC-V architecture support.
356 * Marked io_setup and io_destroy as memory mapping related syscalls.
357 * Fixed leakage of placeholder descriptors to tracees.
358 * Fixed printing of mode_t, umode_t, and umask types.
359 * Fixed decoding of iovec arrays without a limit on total data size.
360 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
361 and ipc family syscalls.
362 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
363 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
365 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
366 * Fixed decoding of struct stat64 on sparc64.
367 * Fixed decoding of uid and gid-related syscalls on sparc64.
368 * Fixed decoding of the forth argument of semctl syscall on sparc64.
369 * Fixed values of tty ioctl constants on sparc64.
370 * Fixed sparc personality support on sparc64.
372 Noteworthy changes in release 4.13 (2016-07-26)
373 ===============================================
376 * Implemented a general netlink socket parser.
377 * Enhanced decoding of socket addresses.
378 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
379 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
380 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
381 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
382 and *_MAGIC constants.
383 * Updated lists of ioctl commands from Linux 4.7.
386 * Fixed decoding of pid_t argument of prlimit64 syscall.
387 * Fixed sign extension issues in the parser of struct rusage.
388 * Fixed race condition in decoding of timeout argument of recvmmsg and
389 rt_sigtimedwait syscalls.
390 * Fixed build with fresh linux kernel headers.
392 Noteworthy changes in release 4.12 (2016-05-31)
393 ===============================================
396 * Implemented simultaneous use of -p option and tracing of a command.
397 (addresses Debian bug #549942).
398 * Implemented caching of netlink conversations to reduce amount of time
399 spent in decoding socket details in -yy mode.
400 * Implemented -yy mode decoding of protocol:portid pairs associated with
401 netlink socket descriptors.
402 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
403 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
405 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
406 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
407 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
408 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
409 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
410 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
411 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
412 statfs64, tgkill, waitid, and xattr family syscalls.
413 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
414 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
415 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
416 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
417 * Added decoding of fadvise64 and fadvise64_64 on s390.
418 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
419 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
420 * Updated lists of ioctl commands from Linux 4.6.
423 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
424 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
425 * Fixed decoding of mlock2 syscall on sparc.
426 * Fixed decoding of osf_shmat syscall on alpha.
427 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
428 (addresses Debian bug #485979 and Fedora bug #1298294).
429 * Fixed decoding of preadv syscall in case of short read.
430 * Fixed decoding and dumping of readv syscall in case of short read.
431 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
432 * Fixed decoding of mincore syscall's last argument.
433 * Fixed remaining errors in mapping between syscall numbers and numbers
434 of syscall arguments.
435 * Applied various fixes to strace-graph script.
437 Noteworthy changes in release 4.11 (2015-12-21)
438 ===============================================
440 * Changes in behavior
441 * Some syscalls have different names depending on architecture and
442 personality. In these cases, syscall filtering and printing now
443 consistently uses the names that match corresponding __NR_* kernel
444 macros of the tracee's architecture and personality.
445 * Added strace prefix to all diagnostic messages.
448 * Enhanced and extended test suite.
449 * Implemented reliable tracing of processes whose personality differs
450 from the personality of strace, fixed decoding of 32-bit personality
451 syscalls on 64-bit architectures.
452 * When some data referenced by syscall arguments is irrelevant or cannot
453 be read from tracee's memory, strace now prints its address consistently.
454 * When a syscall is restarted using restart_syscall mechanism, strace now
455 shows the syscall name on architectures that expose this information.
456 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
457 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
458 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
459 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
460 * Optimized decoding of indirect socket syscalls.
461 * Implemented decoding of nanoseconds along with seconds in stat family
462 syscalls (addresses Fedora bug #1251176).
463 * Implemented decoding of struct statfs.f_flags in statfs syscall.
464 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
466 * Implemented decoding of indirect syscall on mips o32.
467 * Implemented decoding of IPPROTO_IP control messages.
468 * Implemented decoding of setsockopt syscall multicast arguments.
469 * Enhanced decoding of struct sigevent.
470 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
471 and v4l2 ioctl syscall arguments.
472 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
473 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
474 sendfile, setsockopt, and shmctl syscalls.
475 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
476 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
477 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
478 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
479 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
480 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
482 * Added Nios II architecture support.
483 * Added new syscall entries to match Linux 4.4.
486 * Fixed potential short read of strings from tracee's memory.
487 * Fixed -qq option in conjunction with -o option.
488 * Fixed filtering of <unavailable> syscalls.
489 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
490 with 64-bit aligned structures.
491 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
492 syscall flags arguments.
493 * Fixed decoding of 4th argument of clock_nanosleep syscall.
494 * Fixed decoding of getpagesize syscall on m68k.
495 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
496 * Fixed decoding of timezone argument of gettimeofday and settimeofday
498 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
500 * Fixed decoding of pipe syscall on alpha and mips.
501 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
502 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
503 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
505 * Fixed decoding of 4th argument of semctl indirect syscall.
506 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
507 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
508 * Fixed decoding of struct dirent on x32.
509 * Fixed decoding of times syscall return value on mips n32 and x32.
510 * Fixed decoding of path argument of umount2 syscall
511 (addresses Debian bug #785050).
512 * Worked around a kernel bug in tracing privileged executables.
513 * Fixed various errors in mapping between syscall numbers and associated
514 information like the number of syscall arguments, the name of syscall,
517 Noteworthy changes in release 4.10 (2015-03-06)
518 ===============================================
521 * Added -yy option to print protocol and address information associated with
523 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
524 recvmsg, sendmmsg, and recvmmsg syscalls.
525 * Implemented full 32-bit decoding of ioctl commands
526 (addresses Debian bug #692913 and Fedora bug #902788).
527 * Implemented PTRACE_GETREGS API support on ia64.
528 * Implemented PTRACE_GETREGS API support on mips.
529 * Implemented PTRACE_GETREGSET API support on s390/s390x.
530 * Implemented decoding of getrandom and seccomp syscalls.
531 * Implemented full decoding of 64-bit capability sets.
532 * Implemented decoding of all prctl commands.
533 * Implemented decoding of parametrized ioctl commands.
534 * Implemented decoding of evdev ioctl commands.
535 * Implemented decoding of v4l ioctl commands.
536 * Implemented decoding of SG_IO v4 ioctl commands.
537 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
538 * Implemented decoding of FALLOC_FL_* fallocate flags.
539 * Implemented decoding of rt_sigreturn signal mask on aarch64,
541 * Enhanced socket decoder to support bluetooth sockets.
542 * Enhanced decoding of unlisted ioctl commands.
543 * Enhanced decoding of getsockopt and setsockopt syscall.
544 * Enhanced decoding of sysinfo syscall.
545 * Enhanced decoding of struct cmsghdr.
546 * Enhanced decoding of wait status.
547 * Enhanced aio support on non-x86 architectures by using external libaio.h.
548 * Added O_TMPFILE to the list of recognized open mode flags.
549 * Updated the list of filesystem type constants that is used in decoding
550 statfs family syscalls.
551 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
553 * Updated lists of signal constants from Linux 3.19.
554 * Updated lists of errno constants from Linux 3.19.
555 * Updated lists of ioctl commands from Linux 3.9.
556 * Added new syscall entries to match Linux 3.19.
559 * Fixed various errors in mapping between syscall numbers and associated
560 information like the number of syscall arguments, the name of syscall,
562 * Fixed quoting issues in printing descriptors, filenames, network interface
563 names, struct utsname members, device/volume names of BLK* ioctl commands.
564 * Fixed uid_t/git_t decoding.
565 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
566 * Fixed potential open flags truncation on some architectures.
567 * Fixed decoding of struct ifreq.ifr_name.
568 * Fixed decoding of SIOCSIFNAME ioctl command.
569 * Fixed decoding of RENAME_* renameat2 flags.
570 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
571 * Fixed decoding of indirect ipc subcalls on some architectures.
572 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
573 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
574 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
575 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
576 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
577 sparc, sparc64, mips, and s390.
578 * Fixed instruction pointer output (-i option) on architectures that support
579 several personalities.
580 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
582 * Fixed build on systems where struct sigaction has no sa_restorer member.
583 * Fixed build with uclibc and musl libc.
586 * Linux kernel >= 2.5.46 is required.
587 Older versions without a decent PTRACE_SETOPTIONS support will not work.
588 * On mips, linux kernel >= 2.6.15 is required.
589 Older versions without a decent PTRACE_GETREGS support will not work.
590 * On s390 and s390x, linux kernel >= 2.6.27 is required.
591 Older versions without a decent PTRACE_GETREGSET support will not work.
593 Noteworthy changes in release 4.9 (2014-08-15)
594 ==============================================
596 * Changes in behavior
597 * Disabled OABI support on ARM EABI systems by default,
598 added --enable-arm-oabi option to enable it at configure time.
601 * Added experimental -k option to print stack trace after each traced syscall.
602 * Added -w option to produce stats on syscall latency.
603 (addresses Debian bug #457497).
604 * Added ARC architecture support.
605 * Added PTRACE_GETREGS API support on PowerPC.
606 * Enhanced Bionic libc and musl libc support.
607 * Enhanced tracing of x86 personality processes on x86_64 and x32.
608 * Enhanced tracing of ARM personality processes on AArch64.
609 * Enhanced 32/64bit personality detection on PowerPC.
610 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
611 renameat2, and request_key syscalls.
612 * Robustified decoding of select, pselect, and io_submit syscalls.
613 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
614 setdomainname, sethostname, setns, and sync_file_range syscalls.
615 * Enhanced decoding of signal bitmasks.
616 * Enhanced decoding of file descriptors.
617 * Enhanced siginfo_t decoding.
618 * Enhanced PF_NETLINK decoding.
619 * Updated CLOCK_* constants
620 (addresses Fedora bug #1088455).
621 * Added new syscall entries to match Linux 3.16.
624 * Added shmat and shmdt to the set of memory mapping related syscalls.
625 * Fixed detaching from stopped processes.
626 * Fixed fanotify_mark decoding on 32bit architectures.
627 * Fixed offset decoding in preadv and pwritev syscalls.
628 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
629 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
630 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
631 (addresses Fedora bug #993384).
632 * Miscellaneous corrections in the manual page.
633 (Addresses Debian bug #725987).
635 Noteworthy changes in release 4.8 (2013-06-03)
636 ==============================================
638 * Changes in behavior
639 * In case of normal strace termination, when the trace output is
640 redirected to a pipe, strace now closes it and waits for the pipe
641 process termination before exit.
644 * Implemented tracing using PTRACE_SEIZE API (when available).
645 * Implemented more reliable PTRACE_GETREGSET-based process personality
646 detection on x86-64 and x32 (when available).
647 * Added -e trace=memory option for tracing memory mapping related syscalls.
648 * Documented -b option.
649 * Allowed exit status messages to be suppressed by giving -q option twice.
650 * Added AArch64 architecture support
651 (addresses Debian bug #693074 and Fedora bug #969858).
652 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
653 * Added tilegx personality support for Tile.
654 * Enhanced support of NOMMU architectures.
655 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
657 * Added new syscall entries to match Linux 3.9.
658 * Regenerated the list of common ioctl names from Linux 3.9.
659 * Updated the list of errno constants.
660 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
661 PTRACE_O_*, and TCP_* constants.
662 * Implemented decoding of UBI ioctls.
663 * Removed redundant "*32" ioctl names.
666 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
667 (addresses Fedora bug #659382).
668 * Fixed kernel release string parsing
669 (addresses Debian bug #702309).
670 * Fixed decoding of *xattr syscalls
671 (addresses Fedora bug #885233).
672 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
673 (addresses Fedora bug #912790).
674 * Fixed tracing forks on SPARC.
675 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
676 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
677 and truncate64 syscalls.
678 * Fixed categories of multiple syscalls on most of supported architectures.
679 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
680 * Fixed decoding of multiple 32-bit personality syscalls on x32.
681 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
682 S390x, and Tile architectures.
683 * Fixed semtimedop decoding on S390x.
684 * Fixed sram_alloc decoding on Blackfin.
685 * Fixed build when process_vm_readv is a stab.
686 * Fixed build with older versions of libaio.h.
688 Noteworthy changes in release 4.7 (2012-05-02)
689 ==============================================
691 * Changes in behavior
692 * strace no longer suspends waitpid until there is a child
693 for waitpid'ing process to collect status from.
694 * strace no longer detaches from a tracee which is supposed
696 * strace now issues a new message: "+++ exited with EXITCODE +++"
697 which shows exact moment strace got exit notification,
698 analogous to existing "+++ killed by SIG +++" message.
701 * Added x32 personality support (x86_64 architecture).
702 * Added -y and -P options to print file descriptor paths and
703 filter by those paths.
704 * Added -I option to control strace interactivity.
705 * Allowed -p option to take comma or whitespace-separated list of PIDs.
706 * Added strace_log_merge script helper to merge timestamped "strace -ff"
708 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
709 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
710 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
711 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
712 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
713 listxattr, setrlimit and swapon syscalls.
714 * Implemented decoding of loop and mtd ioctls.
715 * Added syscall entries for new linux syscalls.
716 * Added syscall entries for direct socket system calls on powerpc.
717 * Updated the list of errno constants.
718 * Updated lists of MSG_*, STA_*, and TCP_* constants.
719 * Regenerated the list of ioctl names from Linux 3.3.
720 * Enhanced switching between processes with different personalities.
721 * Enhanced signals reporting by using short signal names.
722 * Made ERESTART* messages more descriptive.
723 * Made parsing of numbers from strings more robust.
724 * Added support for compat_statfs64 and statfs64.f_flags.
725 * Changed read of data blocks to use single process_vm_readv syscall
726 (when available) instead of several PTRACE_PEEKDATA operations.
727 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
728 operation instead of several PTRACE_PEEKUSER operations.
729 * Applied various optimizations to make strace work faster.
732 * Implemented proper handling of real SIGTRAPs on kernels supporting
733 PTRACE_O_TRACESYSGOOD.
734 (Addresses Fedora bug #162774).
735 * Fixed sockaddr_un.sun_path name in decoded output.
736 (Addresses Debian bug #554946).
737 * Fixed to avoid potential core file clobbering on exit.
738 (Addresses Debian bug #656398).
739 * Fixed a typo in documentation.
740 (Addresses Debian bug #653309).
741 * Fixed decoding of timer id returned by timer_create.
742 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
743 * Fixed *at syscalls flags decoding.
744 * Fixed ARM EABI 64-bit syscall's arguments decoding.
745 * Fixed semtimedop decoding on s390.
746 * Fixed osf_sigprocmask decoding on alpha.
747 * Fixed ipc and socket subcall decoding on several architectures.
748 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
749 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
750 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
751 * Corrected io_* syscall entries on ARM.
752 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
753 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
754 * Fixed build when libaio-devel is not available.
755 * Fixed configure checks for PTRACE_* constants.
756 * Fixed compilation warnings remained on several architectures.
759 * Removed all non-Linux code. After years of neglect, that dead code
760 just hampered further strace development.
761 * Linux kernel >= 2.6.18 is recommended. Older versions might still
762 work but they haven't been thoroughly tested with this release.
764 Noteworthy changes in release 4.6 (2011-03-15)
765 ==============================================
767 * Changes in behavior
768 * Print diagnostic information about changes in personality mode to
769 standard error instead of standard output.
772 * Implemented a new method of following clone, fork, and vfork
773 syscalls using the Linux kernel's explicit facilities for tracing
774 creation of threads and child processes.
775 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
776 * Implemented decoding of TLS syscalls on m68k.
777 * Implemented biarch support on powerpc64.
778 * Implemented biarch support for getrlimit() and setrlimit().
779 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
780 * Implemented SOL_SCTP socket options decoding.
781 * Added HDIO_* ioctl names.
782 (Addresses Debian bug #450953).
783 * Added LOOP_* ioctl names.
784 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
785 to match Linux 2.6.37.
786 * Updated the list of IPPROTO_* constants to match netinet/in.h.
787 * Implemented decoding of HDIO_* and BLK* ioctls.
788 * Added MicroBlaze architecture support.
789 * Added new syscall entries to match Linux 2.6.37.
790 * Regenerated list of ioctl names from Linux 2.6.37.
791 * Enhanced signal notification decoding.
792 * Documented -C and -D options.
795 * Fixed fetching syscall arguments on m68k.
796 * Fixed an error when judging whether a process has children.
797 * Fixed get/set_robust_list syscall numbers for powerpc.
798 * Fixed a corner case in printing clone flags.
799 * Fixed cross-compiling issues.
800 * Fixed build issues on powerpc64, SH and SPARC.
801 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
802 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
803 fanotify_init, and fanotify_mark syscalls.
804 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
805 * Fixed biarch support in IO dumping.
806 * Fixed raw exit_group decoding.
807 * Fixed decoding of file descriptors on 64-bit architectures.
808 * Fixed a corner case in waitpid handling.
809 (Addresses Red Hat bug #663547).
810 * Fixed stat64 decoding on mips
811 (Addresses Debian bug #599028).
812 * Fixed misleading italics in the manual page.
813 (Addresses Debian bug #589323).
815 Noteworthy changes in release 4.5.20 (2010-04-13)
816 =================================================
819 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
820 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
821 rt_tgsigqueueinfo, perf_event_open.
822 * Enhanced decoding of recently added syscalls on non-x86 architectures
823 by replacing a bare decoder with elaborate parsers enabled earlier
825 * Implemented -C option to combine regular and -c output.
826 (Addresses Debian bug #466196)
827 * Enhanced decoding of mbind and mremap syscalls.
828 * Enhanced SOL_PACKET socket options decoding.
829 * Regenerated list of ioctl names from linux 2.6.33.
830 * Added TILE architecture support.
833 * Fixed build with Linux kernel headers 2.6.32-rc5+.
834 (Addresses Debian bug #560516 and Fedora bug #539044)
835 * Fixed build on mips.
836 * Fixed handling of Linux systems without struct statfs64.
837 * Fixed reporting signal mask by sigreturn on powerpc.
838 * Fixed potential stack buffer overflow in select decoder.
839 (Addresses Fedora bug #556678)
840 * Corrected msgsnd indirect ipccall decoding.
841 * Corrected decoding of 64bit syscalls.
842 (Addresses Debian bug #570603)
843 * Corrected getsockopt decoding on architectures where
844 sizeof(long) > sizeof(int).
845 (Addresses Debian bug #494844)
846 * Corrected decoding of epoll_pwait.
847 (Addresses Debian bug #513014)
848 * Corrected handling of killed threads.
850 Noteworthy changes in release 4.5.19 (2009-10-21)
851 =================================================
853 * Changes in behavior
854 * When command exits, strace now exits with the same exit status.
855 If command is terminated by a signal, strace terminates itself
856 with the same signal, so that strace can be used as a wrapper
857 process transparent to the invoking parent process.
858 When using -p option, the exit status of strace is zero unless
859 there was an unexpected error in doing the tracing.
860 (Addresses Fedora bug #105371 and Debian bug #37665)
863 * Implemented decoding of new Linux syscalls: accept4, dup3,
864 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
865 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
866 * Implemented decoding of accept4 socketcall.
867 * Enhanced prctl decoding.
868 * Enhanced nanosleep decoding.
869 * Enhanced ptrace decoding.
870 * Enhanced futex decoding.
871 * Enhanced CAP_* decoding.
872 * Enhanced SIOCS* ioctls decoding.
873 * Enhanced fcntl F_* flags decoding.
874 * Enhanced semop/semtimedop decoding.
875 * Updated ARM architecture support.
876 * Added Blackfin architecture support.
877 * Added AVR32 architecture support.
878 * Added CRIS architecture support.
879 * Made strace detect when traced process suddenly disappeared.
882 * Fixed syscall numbers for tee and sync_file_range.
883 (Addresses Debian bug #503124)
884 * Fixed several bugs in strings decoder, including potential heap
886 (Addresses Fedora bugs #470529, #478324 and #511035)
887 * Marked sendfile(2) as a network syscall.
888 (Addresses Debian bug #509499)
889 * Fixed accept(2) decoding.
890 (Addresses Debian bug #507573)
891 * Fixed sigtimedwait(2) decoding.
892 * Fixed build on ARM EABI.
893 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
894 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
895 (Addresses Red Hat bug #471169)
896 * Fixed display of 32-bit argv array on 64-bit architectures.
897 (Addresses Fedora bug #519480)
898 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
899 * Fixed HPPA architecture support.
900 (Addresses Debian bugs #437928 and #546619)
905 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
906 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
911 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
912 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
913 * Improved output for prctl system call on Linux.
914 * Improved support for Linux/ARM.
915 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
920 * Improved output for delete_module, futex, and mbind system calls on Linux.
921 * Improved output for SG_IO ioctls on Linux.
922 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
923 eventfd, getcpu, epoll_pwait.
928 * Several biarch improvements.
929 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
930 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
935 * Accept numeric system calls in -e.
940 * Introduce "-e trace=desc".
945 * Better x86-64 support for IA32 processes.
946 * Update PowerPC system calls.
947 * Better printing for Linux aio system calls.
951 * Quick fix release for build issues.
952 * One fix for Linux/ARM system call table.
957 * Print fault address for SIGSEGV/SIGBUS signals when available.
962 * Improve socket ioctl printing.
963 * Update Linux/IA64 syscall list.
964 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
965 * Improve mount flags printing.
966 * Support symbolic printing of x86_64 arch_prctl parameters.
971 * Update syscall tables for Alpha, ARM, HPPA.
972 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
973 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
974 * Improve ioctl command name matching.
975 * Print RTC_* ioctl structure contents.
976 * Support newer RLIMIT_* values.
977 * Print struct cmsghdr details in sendmsg.
982 * Print attribute values in *xattr system calls on Linux.
983 * Include pread and pwrite calls in -e read and -e write tracing.
984 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
985 * Print clock_t values symbolically in Linux clock_* system calls.
989 * Bug fixes, Linux ioctl updates.
990 * David Miller contributed support for Linux/SPARC64.
998 * Update Linux ioctl lists.
999 * Update PF_* and AF_* value lists.
1000 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
1005 * On Linux using NPTL threads, -p will now attach to all threads in a process.
1006 * Handle new mq_* system calls in Linux 2.6.6 and later.
1011 * Report some new VM_* bit values on Linux.
1012 * Better output for Linux sched_* system calls.
1017 * Display multiple ioctl name matches on Linux.
1021 * New port to AMD's x86-64 architecture. One strace binary can
1022 handle both new x86-64 and old i386 processes.
1023 * Fixed support for LFS64 calls.
1024 * New switch -E to add/remove environment variables for the command.
1025 * Merged s390/s390x port.
1026 * Trace an unbounded number of processes.
1027 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
1028 * Fixed bugs with attach/detach leaving things stopped.
1029 * Fixed traced process seeing ECHILD despite live, traced children
1030 in waitpid calls with WNOHANG.
1031 * Stuart Menefy contributed a port to Linux/SH.
1032 * Stephen Thomas contributed a port to Linux/SH64.
1033 * Many other bug fixes.
1037 * Fix Linux/ia64 support, looks like someone renamed a few things on us
1038 * Fix the ioctl setup for Linux, turned out it did not really work.
1039 Improve the ioctl extractor as well so we decode some more ones.
1043 * compile fixes for Linux/mips
1047 * Linux ia64 and hppa ports added
1048 * The usual Linux syscall updates (includes 32bit uid/gid support),
1049 * Linux ioctl list updated
1050 * Support IPv6 scope ids
1051 * FreeBSD/i386 port added
1052 * UnixWare and Solaris updates
1053 * Better support for tracing multithreaded processes in Linux
1057 * Compiles on glibc2.0 systems again
1058 * Linux/S390 port added
1059 * The usual Linux syscall updates
1060 * we can follow fork on arm now
1064 * Linux/MIPS port added
1065 * Lots of Linux updates again
1066 * Improved IPv6 support
1072 * Compiles on glibc2.0 systems again
1076 * Get stat structure properly on Linux 64bit archs
1077 * Personalities work again
1078 * Compile correctly on SunOS again
1084 * Linux (ultra)sparc fixes
1091 * add support for more Linux architectures (powerpc, sparc, arm)
1092 * support lots more Linux syscalls
1093 * fix signal handling
1094 * add IPX and IPIP support
1095 * check stray syscall after execv
1096 * fix hanging children
1098 Changes in version 3.1
1099 ======================
1101 * Irix5 is supported
1102 * Linux 68k is supported
1103 * Linux alpha is supported
1104 * configure is upgraded to autoconf 2.x
1105 * using -f in combination with -e now works correctly
1106 * output can be piped to a program
1107 * tracing setuid programs works better
1108 * it is now reasonable to install strace setuid to root in some circumstances
1109 * new useful tracing names like file and process to trace whole
1110 classes of system calls, e.g. -efile traces all system calls that
1111 take a file name as an argument
1112 * IPC calls on SunOS 4.1.x are decoded
1113 * Linux program memory is reliably dereferenced
1114 * Linux decodes at least the name of all syscalls as of pre2.0.4
1115 * various cosmetic changes and bug fixes
1117 Changes from versions 2.x to version 3.0
1118 ========================================
1120 * filename arguments are neither abbreviated nor stringified
1121 * string arguments are now true C strings using octal instead of hex by default
1122 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
1123 * by default the output for multiple processes now goes into one file
1124 * all structures, vectors, bitsets, etc. use consistent output formats
1125 * the -c option now means count calls, -i does what the old -c used to do
1127 New Features in version 3.0
1128 ===========================
1130 * non-ascii strings can be optionally printed entirely in hex
1131 * the output format is readable when multiple processes are generating output
1132 * exit values are printed in an alignment column
1133 * is is possible to suppress messages about attaching and detaching
1134 * various tracing features can be enabled on a per syscall/signal/desc basis
1135 * selective tracing of syscalls
1136 * selective printing of syscall structures
1137 * selective abbreviation of long structures on a per syscall basis
1138 * selective printing of raw syscall arguments and results
1139 * selective tracing of signals
1140 * selective dumping of all I/O read from file descriptors
1141 * selective dumping of all I/O written to file descriptors
1142 * optional counting of time, calls, and errors for each syscall
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