1 Noteworthy changes in release ?.?? (????-??-??)
2 ===============================================
5 * Implemented decoding of kvm vcpu exit reason (-e kvm=vcpu option),
6 requires Linux kernel version 4.16.0 or higher.
7 * Implemented decoding of KVM_SET_CPUID2 and KVM_GET_*_CPUID ioctl commands.
8 * Enhanced decoding of corner cases of SO_LINGER, SO_PEERCRED,
9 and PACKET_STATISTICS getsockopt options.
10 * Wired up io_pgetevents and rseq syscalls on hppa, microblaze, mips, powerpc,
12 * Updated lists of AUDIT_*, BPF_*, IFA_*, IFLA_*, RTA_*, RTPROT_*, TCP_*,
13 TRAP_*, and UDP_* constants.
14 * Updated lists of ioctl commands from Linux 4.18.
17 * Fixed decoding of Q_XGETQSTAT on non-native personalities.
18 * Fixed race condition in aio test.
19 * Fixed build with Bionic libc.
20 * Fixed build with glibc-2.28.
21 * Fixed build in exotic systemd-nspawn based environments.
22 * Fixed build on s390 with kernel headers that do not contain Linux commit
25 Noteworthy changes in release 4.23 (2018-06-14)
26 ===============================================
28 * Changes in behaviour
29 * On x32 personality, 64-bit syscalls (such as readv) are now shown with "#64"
30 suffix instead of "64:" prefix. Unlike the old names, these new names
31 can be used in syscall qualification expressions.
32 * Changed error number output format: error numbers are consistently
33 printed as "-1 ECONST (Error description)"
34 for known errors and as "-1 (errno 123)" for unknown errors,
35 regardless of -e raw qualification settings. One can specify
36 -X raw for displaying raw error numbers unconditionally.
37 * Unfetchable addresses inside arrays are now printed as comments.
38 * Obsolete IA-32 mode syscall names are no longer printed on ia64.
41 * Implemented libdw backend for -k option, configured at build time
42 using --with-libdw option.
43 Whether -k option is compiled is now configured at build time
44 using --enable-stacktrace option.
45 * Added -X option for configuring xlat output formatting (addresses
47 * Added support for personality designation ("64", "32", or "x32") to syscall
48 qualifications in -e trace expressions.
49 * Implemented injection of syscalls with no side effects as an alternative
50 to injection of an invalid syscall (-e inject=SET:syscall= expression).
51 * Improved support for reproducible builds (addresses Debian bug #896016).
52 * Implemented decoding of BPF_PROG_QUERY and BPF_RAW_TRACEPOINT_OPEN bpf
54 * Implemented decoding of INOTIFY_IOC_SETNEXTWD and PERF_EVENT_IOC_* ioctl
56 * Implemented decoding of PR_GET_SPECULATION_CTRL and PR_SET_SPECULATION_CTRL
57 prctl syscall options.
58 * Enhanced decoding of bpf, getsockopt, setsockopt, and socket syscalls.
59 * Enhanced decoding of NETLINK_KOBJECT_UEVENT and NETLINK_ROUTE protocols.
60 * Enhanced decoding of *_DIAG_MEMINFO netlink attributes.
61 * Enhanced decoding of BTRFS_*, FS_IOC_*, SIOCGIFHWADDR, and SIOCSIFHWADDR
63 * Enhanced decoding of AF_BLUETOOTH socket addresses.
64 * Implemented decoding of io_pgetevent syscall.
65 * Wired up rseq syscall.
66 * Updated lists of ADJ_*, BPF_*, BPF_F_*, BPF_PROG_TYPE_*, ETH_P_*, FPE_*,
67 IFF_*, IPPROTO_*, MAP_*, MS_*, MSG_*, NETLINK_*, PACKET_*, PROT_*, SCTP_*,
68 SECCOMP_FILTER_FLAG_*, SEGV_*, SEM_*, SHM_*, SW_*, V4L2_CID_*,
69 V4L2_CTRL_CLASS_*, and V4L2_PIX_FMT_* constants.
70 * Updated lists of ioctl commands from Linux 4.17.
73 * Fixed decoding of msgtyp argument of msgrcv syscall.
74 * Fixed fallback definitions for F_*, MCL_*, MSG_ZEROCOPY, SI_*,
75 and SOL_SOCKET constants.
76 * Fixed -e trace=%pure expression on mips.
78 Noteworthy changes in release 4.22 (2018-04-05)
79 ===============================================
81 * Changes in infrastructure
82 * The mailing list was moved to strace-devel@lists.strace.io.
83 * SourceForge git repository
84 (https://sourceforge.net/p/strace/code/ci/master/tree/) is no longer
85 maintained. Please use GitLab (https://gitlab.com/strace/strace/)
86 or GitHub (https://github.com/strace/strace/) repository instead.
88 * Changes in behaviour
89 * When printing string data, '8' and '9' following an octal escape sequence
90 no longer lead to unabbreviated octal escape sequence output, as they used
92 * Angle brackets are now printed as octal number escape sequences
93 in the output of paths associated with file descriptors.
94 * Data dump for write syscalls (-e write) is performed regardless
95 of successfulness of these syscall (addresses Debian bug #436284).
96 * -r and -t options are now affect output independently. Previously,
97 -r option led to ignoring of the -t option (addresses Debian bug #466195).
100 * Implemented delay injection (-e inject=SET:delay_enter= and
101 -e inject=SET:delay_exit= options).
102 * Added -A option for opening output files in append mode
103 (addresses Debian bug #528488).
104 * IPv6 addresses shown in socket information in -yy mode are now printed
106 * Enhanced decoding of bpf, prctl and ptrace syscalls.
107 * Enhanced decoding of BTRFS_IOC_INO_PATHS, BTRFS_IOC_LOGICAL_INO, and PTP_*
109 * Enhanced NETLINK_ROUTE protocol decoding.
110 * Updated lists of signal codes.
111 * Updated lists of BPF_*, BTN_*, ETH_P_*, INET_DIAG_BC_*, KEY_*, POLL*, RWF_*,
112 SCHED_FLAG_*, SCTP_* and error constants.
113 * Implemented block/character device number printing in -yy mode.
114 * Known pixel/SDR format names are printed as comments for pixelformat fields
116 * Enhanced decoding of kern_features syscall.
117 * Enhanced NETLINK_NETFILTER netlink protocol decoder.
118 * Optimized handling of large number of tracees.
119 * Improved wall clock time measurement in syscall count statistics
121 * Extended the range of allowed values in -e inject=...:retval= expression.
122 * Added i18n support.
123 * Updated lists of ioctl commands from Linux 4.16.
124 * Enhanced manual page.
127 * Fixed build on m68k.
128 * Fixed v4l2 pixelformat decoding on big-endian architectures.
131 Noteworthy changes in release 4.21 (2018-02-13)
132 ===============================================
134 * Changes in behaviour
135 * Warning is now issued when -F option is used.
136 * Warning is now issued when a tracee with unsupported personality
138 * Unknown syscall numbers are now printed in hexadecimal form.
141 * Implemented decoding of netlink descriptor attributes as file descriptors.
142 * Implemented decoding of hugetlb page size selection flags.
143 * Implemented decoding of BPF_PROG_TEST_RUN, BPF_PROG_GET_NEXT_ID,
144 BPF_MAP_GET_NEXT_ID, BPF_PROG_GET_FD_BY_ID, BPF_MAP_GET_FD_BY_ID,
145 and BPF_OBJ_GET_INFO_BY_FD commands of bpf syscall.
146 * Enhanced decoding of get_thread_area, memfd_create, modify_ldt,
147 perf_event_open, reboot, s390_guarded_storage, s390_pcio_mmio_read,
148 s390_pci_mmio_write, s390_runtime_instr, s390_sthyi, set_thread_area,
150 * Implemented decoding of KVM_* and DM_LIST_DEVICES ioctl commands.
151 * Implemented decoding of riscv_flush_icache syscall.
152 * Enhanced decoding of getsockopt and setsockopt syscalls for SOL_NETLINK
154 * Enhanced decoding of BPF_MAP_CREATE command of bpf syscall.
155 * Print values returned by mq_open syscall and first arguments
156 of mq_getsetattr, mq_notify, mq_timedreceive, and mq_timedsend syscalls
158 * Added decoding of get_tls syscall on arm.
159 * Added -e trace=%pure option for tracing system calls with no arguments that
161 * Updated lists of IPV6_*, MAP_*, MEMBARRIER_CMD_*, MSG_*, NT_*, PKEY_*,
162 SHM_*, and TCP_* constants.
163 * Added manual page for the strace-log-merge command.
164 * Updated lists of ioctl commands from Linux 4.15.
165 * Implemented biarch support for s390x.
166 * Implemented an optional support for symbol demangling in strace -k output
167 (activated by --with-libiberty configure option).
168 * Information about availability of demangling and reliable personality
169 decoding (on architectures with multiple personalities) is now available
171 * Added decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls on
172 powerpc and powerpc64.
173 * Enhanced manual page.
176 * Fixed multi-personality support in cross builds.
177 * Added mq_getsetattr, mq_notify, mq_open, mq_timedreceive, and mq_timedsend
178 syscalls to %desc tracing set.
179 * Fixed path tracing support for mmap syscalls with indirect arguments and
180 for old select syscall.
181 * Fixed decoding of arm-specific (__ARM_NR_*) syscalls.
182 * Fixed open mode flags decoding.
183 * Fixed corner cases in handling of strace -ff -ttt logs by strace-log-merge.
184 * Error counts that exceed one billion are now printed correctly in call
186 * Fixed call summary header for x32 personality.
187 * Changes of tracee personalities are reported more reliably.
188 * Fixed the case when strace attaches to a tracee being inside exec and its
189 first syscall stop is syscall-exit-stop instead of syscall-enter-stop,
190 which messed up all the syscall state tracking.
191 * Fixed printing of higher 32 bits of the return value for x32 personality.
194 * A C compiler that supports "for" loop initial declarations is now required.
195 * Inability to configure multiple personality support on architectures where
196 multiple personalities are supported leads to configuration failure during
197 build now. Use --enable-mpers=check to revert to the old behaviour.
198 * Build-time requirement for the mpers support has been lowered from gawk 4
200 * Removed incomplete and non-functional support for the CRIS architecture.
201 * Removed incomplete and unused support for IA-32 mode on the IA-64
204 Noteworthy changes in release 4.20 (2017-11-13)
205 ===============================================
208 * Implemented decoding of NETLINK_NETFILTER netlink message types and flags.
209 * Implemented decoding of SECCOMP_GET_ACTION_AVAIL operation of seccomp
211 * Updated lists of ARPHRD_*, BPF_*, ETH_P_*, LOOP_*, MADV_*,
212 MEMBARRIER_CMD_*, MFD_*, SECCOMP_*, SO_*, SOL_*, TCP_*, and UFFD_FEATURE_*
214 * Added decoding of statx syscall on hppa.
215 * Updated lists of ioctl commands from Linux 4.14.
218 * Fixed powerpc personality support on powerpc64.
220 Noteworthy changes in release 4.19 (2017-09-05)
221 ===============================================
223 * Changes in behaviour
224 * Changed formatting of personality names on tile architecture in order
225 to make it in line with other multi-personality architectures.
226 * Changed field output order in struct v4l2_requestbuffers to improve in/out
228 * Changed handling of multiple signal= specifications in an injection
229 expression: multiple specification now leads to error instead of implicit
230 usage the last specification.
233 * Enhanced decoding of optlen argument of getsockopt syscall.
234 * Enhanced decoding of SO_LINGER option of getsockopt and setsockopt syscalls.
235 * Enhanced decoding of SO_PEERCRED option of getsockopt syscall.
236 * Enhanced decoding of IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP,
237 IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_JOIN_ANYCAST,
238 IPV6_LEAVE_ANYCAST, MCAST_JOIN_GROUP, and MCAST_LEAVE_GROUP options
239 of setsockopt syscall.
240 * Enhanced decoding of KEYCTL_DH_COMPUTE operation of keyctl syscall
241 (KDF parameters decoding).
242 * Implemented decoding of KEYCTL_RESTRICT_KEYRING operation of keyctl syscall.
243 * Enhanced decoding of UFFDIO_API ioctl command.
244 * Enhanced decoding of BPF_PROG_LOAD, BPF_MAP_CREATE, BPF_MAP_LOOKUP_ELEM,
245 and BPF_MAP_GET_NEXT_KEY commands of bpf syscall.
246 * Implemented decoding of linux socket filter programs specified
247 for SO_ATTACH_FILTER and SO_ATTACH_REUSEPORT_CBPF socket options.
248 * Implemented decoding of inet_diag_req_v2, inet_diag_req_compat,
249 packet_diag_msg, and smc_diag_msg netlink attributes of NETLINK_SOCK_DIAG.
250 * Implemented NETLINK_SELINUX protocol specific decoding.
251 * Implemented decoding of netlink message ack flags.
252 * Implemented decoding of nlmsgerr netlink attributes.
253 * Implemented basic protocol specific decoding of NETLINK_CRYPTO.
254 * Implemented decoding of crypto_user_alg netlink attributes
256 * Implemented basic protocol specific decoding of addr, addrlabel, dcb, link,
257 mdb, neigh, neightbl, netconf, nsid, route, rule, tc, and tca messages
259 * Implemented decoding of NETLINK_KOBJECT_UEVENT messages.
260 * Improved handling of unexpected tracees (the ones that cloned with
261 CLONE_PARENT/CLONE_PTRACE or called PTRACE_TRACEME on themselves): they
262 are now PTRACE_DETACH'ed instead of PTRACE_CONT'ed.
263 * Updated lists of BPF_*, KEY_*, RWF_*, SCM_*, SO_*, and *_MAGIC constants.
264 * Added decoding of arch_prctl syscall on x86.
265 * Added decoding of seccomp, bpf, userfaultfd, membarrier, mlock2,
266 copy_file_range, preadv2, pwritev2, and statx on alpha.
267 * Added decoding of statx syscall on microblaze.
268 * Added decoding of s390_guarded_storage syscall on s390.
269 * Updated lists of ioctl commands from Linux 4.13.
270 * Enhanced manual page.
273 * Fixed printing of group_req structure on non-native personalities.
274 * Fixed output formatting of blkpg_ioctl_arg, dm_name_list, and iocb
276 * Fixed formatting of nul-terminated strings which have kernel-imposed size
278 * Fixed printing of paths that hit PATM_MAX limit in order to match kernel's
280 * Fixed build warnings on Android mips64.
281 * Fixed unused function "is_negated_errno" build warning when built
283 * Fixed syscall number and arguments retrieval behaviour on sparc64 and
284 mips o32 after prctl(PR_SET_DUMPABLE, 0) makes PTRACE_PEEKTEXT impossible
285 to use if Linux kernel has commit v4.10-rc1~114^2~2.
286 * Fixed path tracing for execveat, symlink, symlinkat, inotify_add_watch,
287 and inotify_init syscalls.
288 * Fixed personality switch printing on sparc64 and risc-v.
290 Noteworthy changes in release 4.18 (2017-07-05)
291 ===============================================
294 * Implemented decoding of SCM_TIMESTAMP* control messages.
295 * Implemented decoding of netlink NLMSG_DONE messages.
296 * Implemented decoding of netlink generic nlmsg_type and nlmsg_flags.
297 * Implemented decoding of NETLINK_AUDIT, NETLINK_NETFILTER, NETLINK_ROUTE,
298 NETLINK_SELINUX, NETLINK_SOCK_DIAG, and NETLINK_XFRM message types.
299 * Implemented decoding of NETLINK_GENERIC protocol families.
300 * Implemented basic protocol specific decoding of AF_INET, AF_INET6,
301 AF_NETLINK, AF_PACKET, AF_SMC, and AF_UNIX messages of NETLINK_SOCK_DIAG.
302 * Implemented basic decoding of netlink attributes.
303 * Implemented basic protocol specific decoding of AF_INET, AF_NETLINK,
304 AF_PACKET, AF_SMC, and AF_UNIX netlink attributes of NETLINK_SOCK_DIAG.
305 * Implemented decoding of inet_diag_msg, netlink_diag_msg, and unix_diag_msg
306 netlink attributes of NETLINK_SOCK_DIAG.
307 * Updated lists of ARPHRD_*, KEYCTL_*, NDIAG_SHOW_*, RTM_*, SCM_*, SCTP_*,
308 SO_*, V4L2_*, and prctl ARCH_* constants.
309 * Updated lists of ioctl commands from Linux 4.12.
312 * In interactive mode (-I2), those signals that were blocked at startup
313 will remain blocked for the whole period of strace execution.
314 * strace no longer resets SIGCHLD handler in tracees to the default action.
315 * When traced command is terminated by a blocked signal, strace unblocks
316 that signal to ensure its own termination with the same signal.
317 * Fixed corner cases in decoding of old sigaction syscall.
318 * Fixed build with old kernel headers on mips.
319 * Fixed build on aarch64 and tile with glibc >= 2.26.
320 * Fixed build on arc and nios2.
322 Noteworthy changes in release 4.17 (2017-05-24)
323 ===============================================
325 * Changes in command line syntax
326 * Syscall classes specified in -e trace= option now have % prefix (like
327 -e trace=%process). Old style class names without leading % are still
328 supported, but considered deprecated now.
331 * Optimized syscall filtering.
332 * Improved representation of timestamps.
333 * Enhanced decoding of sched_setattr syscall.
334 * Added -e trace=%stat option for tracing variants of stat syscall.
335 * Added -e trace=%lstat option for tracing variants of lstat syscall.
336 * Added -e trace=%fstat option for tracing variants of fstat and fstatat
338 * Added -e trace=%%stat option for tracing syscalls used for querying file
339 status information (stat, lstat, fstat, fstatat, statx, and their
341 * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs
343 * Added -e trace=%fstatfs option for tracing fstatfs, fstatfs64 and fstatvfs
345 * Added -e trace=%%statfs option for tracing syscalls used for querying file
346 system statistics information (statfs-like, fstatfs-like and ustat).
347 * Added -e trace=/regex option for filtering syscalls using regular
349 * Added support for prepending of question mark before syscall qualification
350 in -e trace expressions in order to suppress error in case no syscalls
351 matched the provided qualification.
352 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
353 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
354 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
356 * Implemented decoding of statx syscall.
357 * Implemented decoding of NS_* ioctl commands.
358 * Implemented decoding of the remaining V4L2_BUF_TYPE_* types.
359 * Implemented decoding of VIDIOC_[SG]_TUNER ioctl commands.
360 * Implemented decoding of NLMSG_ERROR netlink messages.
361 * Improved decoding of BPF_PROG_ATTACH command of bpf syscall.
362 * Improved decoding of misplaced parts in DM_* ioctl commands.
363 * Updated lists of ioctl commands from Linux 4.11.
366 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
367 * Fixed the number of arguments and tracing flags of alpha specific syscalls.
368 * Fixed decoding of old sigsuspend syscall on alpha, cris, mips, powerpc,
369 powerpc64, sh, sh64, sparc, and sparc64.
370 * Fixed decoding of sgetmask and ssetmask syscalls on 64-bit architectures.
371 * Fixed decoding of netlink messages received within struct msghdr.
372 * Worked around a bug in miscompiled aarch64 kernels leading to the 3rd
373 argument of sched_getattr syscall being not quite 32-bit.
374 * Fixed corner cases of printing inaccessible times argument of utimes
375 and futimesat syscalls.
377 Noteworthy changes in release 4.16 (2017-02-14)
378 ===============================================
381 * Implemented syscall return value injection (-e inject=SET:retval= option).
382 * Implemented signal injection (-e inject=SET:signal= option).
383 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
384 * Implemented decoding of all SG_* ioctl commands.
385 * Implemented decoding of ustat syscall.
386 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
387 and BPF_PROG_DETACH commands of bpf syscall.
388 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
389 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
391 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
392 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
393 * Updated lists of ioctl commands from Linux 4.10.
394 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
398 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
399 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
400 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
401 and pwritev* syscalls on x32.
402 * Fixed printing of string arguments of getxattr and setxattr syscalls
403 when -s option is used to limit the printed string size.
404 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
406 * Fixed decoding of SG_* and LOOP_* ioctl commands.
407 * Fixed build on mips with musl libc.
408 * Fixed cross-building of ioctlsort.
409 * Applied minor formatting fixes to the manual page.
411 Noteworthy changes in release 4.15 (2016-12-14)
412 ===============================================
414 * Changes in behavior
415 * Time stamps are now printed according to ISO 8601.
416 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
417 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
418 syscalls is now formatted as an array.
421 * Implemented syscall fault injection (-e fault=... option).
422 * Implemented decoding of DM_* ioctl commands.
423 * Implemented decoding of attr parameter of perf_event_open syscall.
424 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
425 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
426 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
428 * Implemented PTRACE_GETREGS API support on m68k.
429 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
430 and V4L2_* constants.
431 * Updated lists of ioctl commands from Linux 4.9.
432 * Added decoding of recently added syscalls on arc, x32, and xtensa.
433 * Enhanced manual page.
436 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
437 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
438 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
439 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
440 setgroups, setns, unshare, and utimes syscalls.
441 * Fixed handling of verbose flag in printing of controls array
442 of struct v4l2_ext_controls.
443 * Fixed omission of field names in the output of capability, sigaction,
444 sigevent, statfs, timespec, timeval, and utimbuf structures.
445 * Fixed printing of unknown syscalls in siginfo structure.
446 * Fixed decoding of ioctl constants on m68k.
447 * Fixed cris architecture support.
448 * Fixed cross build when host compiler does not support the same
449 set of warning flags as the cross compiler.
450 * Fixed build on SLE10 and SLE11.
452 Noteworthy changes in release 4.14 (2016-10-04)
453 ===============================================
455 * Changes in behavior
456 * When using -p option without a command and no processes has been attached,
457 strace exits with exit status 1.
460 * Added printing of the mode argument of open and openat syscalls
461 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
462 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
463 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
464 and aio family syscalls.
465 * Implemented fetching of the 7th subcall argument on mips o32.
466 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
468 * Updated lists of ioctl commands from Linux 4.8.
469 * Added decoding of new syscalls on sh and sh64.
470 * Added RISC-V architecture support.
473 * Marked io_setup and io_destroy as memory mapping related syscalls.
474 * Fixed leakage of placeholder descriptors to tracees.
475 * Fixed printing of mode_t, umode_t, and umask types.
476 * Fixed decoding of iovec arrays without a limit on total data size.
477 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
478 and ipc family syscalls.
479 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
480 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
482 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
483 * Fixed decoding of struct stat64 on sparc64.
484 * Fixed decoding of uid and gid-related syscalls on sparc64.
485 * Fixed decoding of the forth argument of semctl syscall on sparc64.
486 * Fixed values of tty ioctl constants on sparc64.
487 * Fixed sparc personality support on sparc64.
489 Noteworthy changes in release 4.13 (2016-07-26)
490 ===============================================
493 * Implemented a general netlink socket parser.
494 * Enhanced decoding of socket addresses.
495 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
496 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
497 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
498 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
499 and *_MAGIC constants.
500 * Updated lists of ioctl commands from Linux 4.7.
503 * Fixed decoding of pid_t argument of prlimit64 syscall.
504 * Fixed sign extension issues in the parser of struct rusage.
505 * Fixed race condition in decoding of timeout argument of recvmmsg and
506 rt_sigtimedwait syscalls.
507 * Fixed build with fresh linux kernel headers.
509 Noteworthy changes in release 4.12 (2016-05-31)
510 ===============================================
513 * Implemented simultaneous use of -p option and tracing of a command.
514 (addresses Debian bug #549942).
515 * Implemented caching of netlink conversations to reduce amount of time
516 spent in decoding socket details in -yy mode.
517 * Implemented -yy mode decoding of protocol:portid pairs associated with
518 netlink socket descriptors.
519 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
520 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
522 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
523 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
524 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
525 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
526 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
527 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
528 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
529 statfs64, tgkill, waitid, and xattr family syscalls.
530 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
531 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
532 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
533 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
534 * Added decoding of fadvise64 and fadvise64_64 on s390.
535 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
536 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
537 * Updated lists of ioctl commands from Linux 4.6.
540 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
541 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
542 * Fixed decoding of mlock2 syscall on sparc.
543 * Fixed decoding of osf_shmat syscall on alpha.
544 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
545 (addresses Debian bug #485979 and Fedora bug #1298294).
546 * Fixed decoding of preadv syscall in case of short read.
547 * Fixed decoding and dumping of readv syscall in case of short read.
548 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
549 * Fixed decoding of mincore syscall's last argument.
550 * Fixed remaining errors in mapping between syscall numbers and numbers
551 of syscall arguments.
552 * Applied various fixes to strace-graph script.
554 Noteworthy changes in release 4.11 (2015-12-21)
555 ===============================================
557 * Changes in behavior
558 * Some syscalls have different names depending on architecture and
559 personality. In these cases, syscall filtering and printing now
560 consistently uses the names that match corresponding __NR_* kernel
561 macros of the tracee's architecture and personality.
562 * Added strace prefix to all diagnostic messages.
565 * Enhanced and extended test suite.
566 * Implemented reliable tracing of processes whose personality differs
567 from the personality of strace, fixed decoding of 32-bit personality
568 syscalls on 64-bit architectures.
569 * When some data referenced by syscall arguments is irrelevant or cannot
570 be read from tracee's memory, strace now prints its address consistently.
571 * When a syscall is restarted using restart_syscall mechanism, strace now
572 shows the syscall name on architectures that expose this information.
573 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
574 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
575 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
576 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
577 * Optimized decoding of indirect socket syscalls.
578 * Implemented decoding of nanoseconds along with seconds in stat family
579 syscalls (addresses Fedora bug #1251176).
580 * Implemented decoding of struct statfs.f_flags in statfs syscall.
581 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
583 * Implemented decoding of indirect syscall on mips o32.
584 * Implemented decoding of IPPROTO_IP control messages.
585 * Implemented decoding of setsockopt syscall multicast arguments.
586 * Enhanced decoding of struct sigevent.
587 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
588 and v4l2 ioctl syscall arguments.
589 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
590 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
591 sendfile, setsockopt, and shmctl syscalls.
592 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
593 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
594 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
595 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
596 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
597 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
599 * Added Nios II architecture support.
600 * Added new syscall entries to match Linux 4.4.
603 * Fixed potential short read of strings from tracee's memory.
604 * Fixed -qq option in conjunction with -o option.
605 * Fixed filtering of <unavailable> syscalls.
606 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
607 with 64-bit aligned structures.
608 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
609 syscall flags arguments.
610 * Fixed decoding of 4th argument of clock_nanosleep syscall.
611 * Fixed decoding of getpagesize syscall on m68k.
612 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
613 * Fixed decoding of timezone argument of gettimeofday and settimeofday
615 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
617 * Fixed decoding of pipe syscall on alpha and mips.
618 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
619 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
620 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
622 * Fixed decoding of 4th argument of semctl indirect syscall.
623 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
624 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
625 * Fixed decoding of struct dirent on x32.
626 * Fixed decoding of times syscall return value on mips n32 and x32.
627 * Fixed decoding of path argument of umount2 syscall
628 (addresses Debian bug #785050).
629 * Worked around a kernel bug in tracing privileged executables.
630 * Fixed various errors in mapping between syscall numbers and associated
631 information like the number of syscall arguments, the name of syscall,
634 Noteworthy changes in release 4.10 (2015-03-06)
635 ===============================================
638 * Added -yy option to print protocol and address information associated with
640 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
641 recvmsg, sendmmsg, and recvmmsg syscalls.
642 * Implemented full 32-bit decoding of ioctl commands
643 (addresses Debian bug #692913 and Fedora bug #902788).
644 * Implemented PTRACE_GETREGS API support on ia64.
645 * Implemented PTRACE_GETREGS API support on mips.
646 * Implemented PTRACE_GETREGSET API support on s390/s390x.
647 * Implemented decoding of getrandom and seccomp syscalls.
648 * Implemented full decoding of 64-bit capability sets.
649 * Implemented decoding of all prctl commands.
650 * Implemented decoding of parametrized ioctl commands.
651 * Implemented decoding of evdev ioctl commands.
652 * Implemented decoding of v4l ioctl commands.
653 * Implemented decoding of SG_IO v4 ioctl commands.
654 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
655 * Implemented decoding of FALLOC_FL_* fallocate flags.
656 * Implemented decoding of rt_sigreturn signal mask on aarch64,
658 * Enhanced socket decoder to support bluetooth sockets.
659 * Enhanced decoding of unlisted ioctl commands.
660 * Enhanced decoding of getsockopt and setsockopt syscall.
661 * Enhanced decoding of sysinfo syscall.
662 * Enhanced decoding of struct cmsghdr.
663 * Enhanced decoding of wait status.
664 * Enhanced aio support on non-x86 architectures by using external libaio.h.
665 * Added O_TMPFILE to the list of recognized open mode flags.
666 * Updated the list of filesystem type constants that is used in decoding
667 statfs family syscalls.
668 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
670 * Updated lists of signal constants from Linux 3.19.
671 * Updated lists of errno constants from Linux 3.19.
672 * Updated lists of ioctl commands from Linux 3.9.
673 * Added new syscall entries to match Linux 3.19.
676 * Fixed various errors in mapping between syscall numbers and associated
677 information like the number of syscall arguments, the name of syscall,
679 * Fixed quoting issues in printing descriptors, filenames, network interface
680 names, struct utsname members, device/volume names of BLK* ioctl commands.
681 * Fixed uid_t/git_t decoding.
682 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
683 * Fixed potential open flags truncation on some architectures.
684 * Fixed decoding of struct ifreq.ifr_name.
685 * Fixed decoding of SIOCSIFNAME ioctl command.
686 * Fixed decoding of RENAME_* renameat2 flags.
687 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
688 * Fixed decoding of indirect ipc subcalls on some architectures.
689 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
690 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
691 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
692 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
693 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
694 sparc, sparc64, mips, and s390.
695 * Fixed instruction pointer output (-i option) on architectures that support
696 several personalities.
697 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
699 * Fixed build on systems where struct sigaction has no sa_restorer member.
700 * Fixed build with uclibc and musl libc.
703 * Linux kernel >= 2.5.46 is required.
704 Older versions without a decent PTRACE_SETOPTIONS support will not work.
705 * On mips, linux kernel >= 2.6.15 is required.
706 Older versions without a decent PTRACE_GETREGS support will not work.
707 * On s390 and s390x, linux kernel >= 2.6.27 is required.
708 Older versions without a decent PTRACE_GETREGSET support will not work.
710 Noteworthy changes in release 4.9 (2014-08-15)
711 ==============================================
713 * Changes in behavior
714 * Disabled OABI support on ARM EABI systems by default,
715 added --enable-arm-oabi option to enable it at configure time.
718 * Added experimental -k option to print stack trace after each traced syscall.
719 * Added -w option to produce stats on syscall latency.
720 (addresses Debian bug #457497).
721 * Added ARC architecture support.
722 * Added PTRACE_GETREGS API support on PowerPC.
723 * Enhanced Bionic libc and musl libc support.
724 * Enhanced tracing of x86 personality processes on x86_64 and x32.
725 * Enhanced tracing of ARM personality processes on AArch64.
726 * Enhanced 32/64bit personality detection on PowerPC.
727 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
728 renameat2, and request_key syscalls.
729 * Robustified decoding of select, pselect, and io_submit syscalls.
730 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
731 setdomainname, sethostname, setns, and sync_file_range syscalls.
732 * Enhanced decoding of signal bitmasks.
733 * Enhanced decoding of file descriptors.
734 * Enhanced siginfo_t decoding.
735 * Enhanced PF_NETLINK decoding.
736 * Updated CLOCK_* constants
737 (addresses Fedora bug #1088455).
738 * Added new syscall entries to match Linux 3.16.
741 * Added shmat and shmdt to the set of memory mapping related syscalls.
742 * Fixed detaching from stopped processes.
743 * Fixed fanotify_mark decoding on 32bit architectures.
744 * Fixed offset decoding in preadv and pwritev syscalls.
745 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
746 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
747 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
748 (addresses Fedora bug #993384).
749 * Miscellaneous corrections in the manual page.
750 (Addresses Debian bug #725987).
752 Noteworthy changes in release 4.8 (2013-06-03)
753 ==============================================
755 * Changes in behavior
756 * In case of normal strace termination, when the trace output is
757 redirected to a pipe, strace now closes it and waits for the pipe
758 process termination before exit.
761 * Implemented tracing using PTRACE_SEIZE API (when available).
762 * Implemented more reliable PTRACE_GETREGSET-based process personality
763 detection on x86-64 and x32 (when available).
764 * Added -e trace=memory option for tracing memory mapping related syscalls.
765 * Documented -b option.
766 * Allowed exit status messages to be suppressed by giving -q option twice.
767 * Added AArch64 architecture support
768 (addresses Debian bug #693074 and Fedora bug #969858).
769 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
770 * Added tilegx personality support for Tile.
771 * Enhanced support of NOMMU architectures.
772 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
774 * Added new syscall entries to match Linux 3.9.
775 * Regenerated the list of common ioctl names from Linux 3.9.
776 * Updated the list of errno constants.
777 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
778 PTRACE_O_*, and TCP_* constants.
779 * Implemented decoding of UBI ioctls.
780 * Removed redundant "*32" ioctl names.
783 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
784 (addresses Fedora bug #659382).
785 * Fixed kernel release string parsing
786 (addresses Debian bug #702309).
787 * Fixed decoding of *xattr syscalls
788 (addresses Fedora bug #885233).
789 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
790 (addresses Fedora bug #912790).
791 * Fixed tracing forks on SPARC.
792 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
793 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
794 and truncate64 syscalls.
795 * Fixed categories of multiple syscalls on most of supported architectures.
796 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
797 * Fixed decoding of multiple 32-bit personality syscalls on x32.
798 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
799 S390x, and Tile architectures.
800 * Fixed semtimedop decoding on S390x.
801 * Fixed sram_alloc decoding on Blackfin.
802 * Fixed build when process_vm_readv is a stab.
803 * Fixed build with older versions of libaio.h.
805 Noteworthy changes in release 4.7 (2012-05-02)
806 ==============================================
808 * Changes in behavior
809 * strace no longer suspends waitpid until there is a child
810 for waitpid'ing process to collect status from.
811 * strace no longer detaches from a tracee which is supposed
813 * strace now issues a new message: "+++ exited with EXITCODE +++"
814 which shows exact moment strace got exit notification,
815 analogous to existing "+++ killed by SIG +++" message.
818 * Added x32 personality support (x86_64 architecture).
819 * Added -y and -P options to print file descriptor paths and
820 filter by those paths.
821 * Added -I option to control strace interactivity.
822 * Allowed -p option to take comma or whitespace-separated list of PIDs.
823 * Added strace_log_merge script helper to merge timestamped "strace -ff"
825 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
826 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
827 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
828 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
829 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
830 listxattr, setrlimit and swapon syscalls.
831 * Implemented decoding of loop and mtd ioctls.
832 * Added syscall entries for new linux syscalls.
833 * Added syscall entries for direct socket system calls on powerpc.
834 * Updated the list of errno constants.
835 * Updated lists of MSG_*, STA_*, and TCP_* constants.
836 * Regenerated the list of ioctl names from Linux 3.3.
837 * Enhanced switching between processes with different personalities.
838 * Enhanced signals reporting by using short signal names.
839 * Made ERESTART* messages more descriptive.
840 * Made parsing of numbers from strings more robust.
841 * Added support for compat_statfs64 and statfs64.f_flags.
842 * Changed read of data blocks to use single process_vm_readv syscall
843 (when available) instead of several PTRACE_PEEKDATA operations.
844 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
845 operation instead of several PTRACE_PEEKUSER operations.
846 * Applied various optimizations to make strace work faster.
849 * Implemented proper handling of real SIGTRAPs on kernels supporting
850 PTRACE_O_TRACESYSGOOD.
851 (Addresses Fedora bug #162774).
852 * Fixed sockaddr_un.sun_path name in decoded output.
853 (Addresses Debian bug #554946).
854 * Fixed to avoid potential core file clobbering on exit.
855 (Addresses Debian bug #656398).
856 * Fixed a typo in documentation.
857 (Addresses Debian bug #653309).
858 * Fixed decoding of timer id returned by timer_create.
859 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
860 * Fixed *at syscalls flags decoding.
861 * Fixed ARM EABI 64-bit syscall's arguments decoding.
862 * Fixed semtimedop decoding on s390.
863 * Fixed osf_sigprocmask decoding on alpha.
864 * Fixed ipc and socket subcall decoding on several architectures.
865 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
866 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
867 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
868 * Corrected io_* syscall entries on ARM.
869 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
870 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
871 * Fixed build when libaio-devel is not available.
872 * Fixed configure checks for PTRACE_* constants.
873 * Fixed compilation warnings remained on several architectures.
876 * Removed all non-Linux code. After years of neglect, that dead code
877 just hampered further strace development.
878 * Linux kernel >= 2.6.18 is recommended. Older versions might still
879 work but they haven't been thoroughly tested with this release.
881 Noteworthy changes in release 4.6 (2011-03-15)
882 ==============================================
884 * Changes in behavior
885 * Print diagnostic information about changes in personality mode to
886 standard error instead of standard output.
889 * Implemented a new method of following clone, fork, and vfork
890 syscalls using the Linux kernel's explicit facilities for tracing
891 creation of threads and child processes.
892 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
893 * Implemented decoding of TLS syscalls on m68k.
894 * Implemented biarch support on powerpc64.
895 * Implemented biarch support for getrlimit() and setrlimit().
896 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
897 * Implemented SOL_SCTP socket options decoding.
898 * Added HDIO_* ioctl names.
899 (Addresses Debian bug #450953).
900 * Added LOOP_* ioctl names.
901 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
902 to match Linux 2.6.37.
903 * Updated the list of IPPROTO_* constants to match netinet/in.h.
904 * Implemented decoding of HDIO_* and BLK* ioctls.
905 * Added MicroBlaze architecture support.
906 * Added new syscall entries to match Linux 2.6.37.
907 * Regenerated list of ioctl names from Linux 2.6.37.
908 * Enhanced signal notification decoding.
909 * Documented -C and -D options.
912 * Fixed fetching syscall arguments on m68k.
913 * Fixed an error when judging whether a process has children.
914 * Fixed get/set_robust_list syscall numbers for powerpc.
915 * Fixed a corner case in printing clone flags.
916 * Fixed cross-compiling issues.
917 * Fixed build issues on powerpc64, SH and SPARC.
918 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
919 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
920 fanotify_init, and fanotify_mark syscalls.
921 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
922 * Fixed biarch support in IO dumping.
923 * Fixed raw exit_group decoding.
924 * Fixed decoding of file descriptors on 64-bit architectures.
925 * Fixed a corner case in waitpid handling.
926 (Addresses Red Hat bug #663547).
927 * Fixed stat64 decoding on mips
928 (Addresses Debian bug #599028).
929 * Fixed misleading italics in the manual page.
930 (Addresses Debian bug #589323).
932 Noteworthy changes in release 4.5.20 (2010-04-13)
933 =================================================
936 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
937 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
938 rt_tgsigqueueinfo, perf_event_open.
939 * Enhanced decoding of recently added syscalls on non-x86 architectures
940 by replacing a bare decoder with elaborate parsers enabled earlier
942 * Implemented -C option to combine regular and -c output.
943 (Addresses Debian bug #466196)
944 * Enhanced decoding of mbind and mremap syscalls.
945 * Enhanced SOL_PACKET socket options decoding.
946 * Regenerated list of ioctl names from linux 2.6.33.
947 * Added TILE architecture support.
950 * Fixed build with Linux kernel headers 2.6.32-rc5+.
951 (Addresses Debian bug #560516 and Fedora bug #539044)
952 * Fixed build on mips.
953 * Fixed handling of Linux systems without struct statfs64.
954 * Fixed reporting signal mask by sigreturn on powerpc.
955 * Fixed potential stack buffer overflow in select decoder.
956 (Addresses Fedora bug #556678)
957 * Corrected msgsnd indirect ipccall decoding.
958 * Corrected decoding of 64bit syscalls.
959 (Addresses Debian bug #570603)
960 * Corrected getsockopt decoding on architectures where
961 sizeof(long) > sizeof(int).
962 (Addresses Debian bug #494844)
963 * Corrected decoding of epoll_pwait.
964 (Addresses Debian bug #513014)
965 * Corrected handling of killed threads.
967 Noteworthy changes in release 4.5.19 (2009-10-21)
968 =================================================
970 * Changes in behavior
971 * When command exits, strace now exits with the same exit status.
972 If command is terminated by a signal, strace terminates itself
973 with the same signal, so that strace can be used as a wrapper
974 process transparent to the invoking parent process.
975 When using -p option, the exit status of strace is zero unless
976 there was an unexpected error in doing the tracing.
977 (Addresses Fedora bug #105371 and Debian bug #37665)
980 * Implemented decoding of new Linux syscalls: accept4, dup3,
981 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
982 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
983 * Implemented decoding of accept4 socketcall.
984 * Enhanced prctl decoding.
985 * Enhanced nanosleep decoding.
986 * Enhanced ptrace decoding.
987 * Enhanced futex decoding.
988 * Enhanced CAP_* decoding.
989 * Enhanced SIOCS* ioctls decoding.
990 * Enhanced fcntl F_* flags decoding.
991 * Enhanced semop/semtimedop decoding.
992 * Updated ARM architecture support.
993 * Added Blackfin architecture support.
994 * Added AVR32 architecture support.
995 * Added CRIS architecture support.
996 * Made strace detect when traced process suddenly disappeared.
999 * Fixed syscall numbers for tee and sync_file_range.
1000 (Addresses Debian bug #503124)
1001 * Fixed several bugs in strings decoder, including potential heap
1003 (Addresses Fedora bugs #470529, #478324 and #511035)
1004 * Marked sendfile(2) as a network syscall.
1005 (Addresses Debian bug #509499)
1006 * Fixed accept(2) decoding.
1007 (Addresses Debian bug #507573)
1008 * Fixed sigtimedwait(2) decoding.
1009 * Fixed build on ARM EABI.
1010 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
1011 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
1012 (Addresses Red Hat bug #471169)
1013 * Fixed display of 32-bit argv array on 64-bit architectures.
1014 (Addresses Fedora bug #519480)
1015 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
1016 * Fixed HPPA architecture support.
1017 (Addresses Debian bugs #437928 and #546619)
1022 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
1023 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
1028 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
1029 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
1030 * Improved output for prctl system call on Linux.
1031 * Improved support for Linux/ARM.
1032 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
1037 * Improved output for delete_module, futex, and mbind system calls on Linux.
1038 * Improved output for SG_IO ioctls on Linux.
1039 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
1040 eventfd, getcpu, epoll_pwait.
1045 * Several biarch improvements.
1046 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
1047 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
1052 * Accept numeric system calls in -e.
1057 * Introduce "-e trace=desc".
1062 * Better x86-64 support for IA32 processes.
1063 * Update PowerPC system calls.
1064 * Better printing for Linux aio system calls.
1068 * Quick fix release for build issues.
1069 * One fix for Linux/ARM system call table.
1074 * Print fault address for SIGSEGV/SIGBUS signals when available.
1079 * Improve socket ioctl printing.
1080 * Update Linux/IA64 syscall list.
1081 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
1082 * Improve mount flags printing.
1083 * Support symbolic printing of x86_64 arch_prctl parameters.
1088 * Update syscall tables for Alpha, ARM, HPPA.
1089 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
1090 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
1091 * Improve ioctl command name matching.
1092 * Print RTC_* ioctl structure contents.
1093 * Support newer RLIMIT_* values.
1094 * Print struct cmsghdr details in sendmsg.
1099 * Print attribute values in *xattr system calls on Linux.
1100 * Include pread and pwrite calls in -e read and -e write tracing.
1101 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
1102 * Print clock_t values symbolically in Linux clock_* system calls.
1106 * Bug fixes, Linux ioctl updates.
1107 * David Miller contributed support for Linux/SPARC64.
1115 * Update Linux ioctl lists.
1116 * Update PF_* and AF_* value lists.
1117 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
1122 * On Linux using NPTL threads, -p will now attach to all threads in a process.
1123 * Handle new mq_* system calls in Linux 2.6.6 and later.
1128 * Report some new VM_* bit values on Linux.
1129 * Better output for Linux sched_* system calls.
1134 * Display multiple ioctl name matches on Linux.
1138 * New port to AMD's x86-64 architecture. One strace binary can
1139 handle both new x86-64 and old i386 processes.
1140 * Fixed support for LFS64 calls.
1141 * New switch -E to add/remove environment variables for the command.
1142 * Merged s390/s390x port.
1143 * Trace an unbounded number of processes.
1144 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
1145 * Fixed bugs with attach/detach leaving things stopped.
1146 * Fixed traced process seeing ECHILD despite live, traced children
1147 in waitpid calls with WNOHANG.
1148 * Stuart Menefy contributed a port to Linux/SH.
1149 * Stephen Thomas contributed a port to Linux/SH64.
1150 * Many other bug fixes.
1154 * Fix Linux/ia64 support, looks like someone renamed a few things on us
1155 * Fix the ioctl setup for Linux, turned out it did not really work.
1156 Improve the ioctl extractor as well so we decode some more ones.
1160 * compile fixes for Linux/mips
1164 * Linux ia64 and hppa ports added
1165 * The usual Linux syscall updates (includes 32bit uid/gid support),
1166 * Linux ioctl list updated
1167 * Support IPv6 scope ids
1168 * FreeBSD/i386 port added
1169 * UnixWare and Solaris updates
1170 * Better support for tracing multithreaded processes in Linux
1174 * Compiles on glibc2.0 systems again
1175 * Linux/S390 port added
1176 * The usual Linux syscall updates
1177 * we can follow fork on arm now
1181 * Linux/MIPS port added
1182 * Lots of Linux updates again
1183 * Improved IPv6 support
1189 * Compiles on glibc2.0 systems again
1193 * Get stat structure properly on Linux 64bit archs
1194 * Personalities work again
1195 * Compile correctly on SunOS again
1201 * Linux (ultra)sparc fixes
1208 * add support for more Linux architectures (powerpc, sparc, arm)
1209 * support lots more Linux syscalls
1210 * fix signal handling
1211 * add IPX and IPIP support
1212 * check stray syscall after execv
1213 * fix hanging children
1215 Changes in version 3.1
1216 ======================
1218 * Irix5 is supported
1219 * Linux 68k is supported
1220 * Linux alpha is supported
1221 * configure is upgraded to autoconf 2.x
1222 * using -f in combination with -e now works correctly
1223 * output can be piped to a program
1224 * tracing setuid programs works better
1225 * it is now reasonable to install strace setuid to root in some circumstances
1226 * new useful tracing names like file and process to trace whole
1227 classes of system calls, e.g. -efile traces all system calls that
1228 take a file name as an argument
1229 * IPC calls on SunOS 4.1.x are decoded
1230 * Linux program memory is reliably dereferenced
1231 * Linux decodes at least the name of all syscalls as of pre2.0.4
1232 * various cosmetic changes and bug fixes
1234 Changes from versions 2.x to version 3.0
1235 ========================================
1237 * filename arguments are neither abbreviated nor stringified
1238 * string arguments are now true C strings using octal instead of hex by default
1239 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
1240 * by default the output for multiple processes now goes into one file
1241 * all structures, vectors, bitsets, etc. use consistent output formats
1242 * the -c option now means count calls, -i does what the old -c used to do
1244 New Features in version 3.0
1245 ===========================
1247 * non-ascii strings can be optionally printed entirely in hex
1248 * the output format is readable when multiple processes are generating output
1249 * exit values are printed in an alignment column
1250 * is is possible to suppress messages about attaching and detaching
1251 * various tracing features can be enabled on a per syscall/signal/desc basis
1252 * selective tracing of syscalls
1253 * selective printing of syscall structures
1254 * selective abbreviation of long structures on a per syscall basis
1255 * selective printing of raw syscall arguments and results
1256 * selective tracing of signals
1257 * selective dumping of all I/O read from file descriptors
1258 * selective dumping of all I/O written to file descriptors
1259 * optional counting of time, calls, and errors for each syscall
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