1 Noteworthy changes in release 4.21 (2018-02-13) 2 =============================================== 3 4 * Changes in behaviour 5 * Warning is now issued when -F option is used. 6 * Warning is now issued when a tracee with unsupported personality 7 is attached. 8 * Unknown syscall numbers are now printed in hexadecimal form. 9 10 * Improvements 11 * Implemented decoding of netlink descriptor attributes as file descriptors. 12 * Implemented decoding of hugetlb page size selection flags. 13 * Implemented decoding of BPF_PROG_TEST_RUN, BPF_PROG_GET_NEXT_ID, 14 BPF_MAP_GET_NEXT_ID, BPF_PROG_GET_FD_BY_ID, BPF_MAP_GET_FD_BY_ID, 15 and BPF_OBJ_GET_INFO_BY_FD commands of bpf syscall. 16 * Enhanced decoding of get_thread_area, memfd_create, modify_ldt, 17 perf_event_open, reboot, s390_guarded_storage, s390_pcio_mmio_read, 18 s390_pci_mmio_write, s390_runtime_instr, s390_sthyi, set_thread_area, 19 and shmget syscalls. 20 * Implemented decoding of KVM_* and DM_LIST_DEVICES ioctl commands. 21 * Implemented decoding of riscv_flush_icache syscall. 22 * Enhanced decoding of getsockopt and setsockopt syscalls for SOL_NETLINK 23 level. 24 * Enhanced decoding of BPF_MAP_CREATE command of bpf syscall. 25 * Print values returned by mq_open syscall and first arguments 26 of mq_getsetattr, mq_notify, mq_timedreceive, and mq_timedsend syscalls 27 as file descriptors. 28 * Added decoding of get_tls syscall on arm. 29 * Added -e trace=%pure option for tracing system calls with no arguments that 30 never fail. 31 * Updated lists of IPV6_*, MAP_*, MEMBARRIER_CMD_*, MSG_*, NT_*, PKEY_*, 32 SHM_*, and TCP_* constants. 33 * Added manual page for the strace-log-merge command. 34 * Updated lists of ioctl commands from Linux 4.15. 35 * Implemented biarch support for s390x. 36 * Implemented an optional support for symbol demangling in strace -k output 37 (activated by --with-libiberty configure option). 38 * Information about availability of demangling and reliable personality 39 decoding (on architectures with multiple personalities) is now available 40 in strace -V output. 41 * Added decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls on 42 powerpc and powerpc64. 43 * Enhanced manual page. 44 45 * Bug fixes 46 * Fixed multi-personality support in cross builds. 47 * Added mq_getsetattr, mq_notify, mq_open, mq_timedreceive, and mq_timedsend 48 syscalls to %desc tracing set. 49 * Fixed path tracing support for mmap syscalls with indirect arguments and 50 for old select syscall. 51 * Fixed decoding of arm-specific (__ARM_NR_*) syscalls. 52 * Fixed open mode flags decoding. 53 * Fixed corner cases in handling of strace -ff -ttt logs by strace-log-merge. 54 * Error counts that exceed one billion are now printed correctly in call 55 summary output. 56 * Fixed call summary header for x32 personality. 57 * Changes of tracee personalities are reported more reliably. 58 * Fixed the case when strace attaches to a tracee being inside exec and its 59 first syscall stop is syscall-exit-stop instead of syscall-enter-stop, 60 which messed up all the syscall state tracking. 61 * Fixed printing of higher 32 bits of the return value for x32 personality. 62 63 * Portability 64 * A C compiler that supports "for" loop initial declarations is now required. 65 * Inability to configure multiple personality support on architectures where 66 multiple personalities are supported leads to configuration failure during 67 build now. Use --enable-mpers=check to revert to the old behaviour. 68 * Build-time requirement for the mpers support has been lowered from gawk 4 69 to gawk 3. 70 * Removed incomplete and non-functional support for the CRIS architecture. 71 * Removed incomplete and unused support for IA-32 mode on the IA-64 72 architecture. 73 74 Noteworthy changes in release 4.20 (2017-11-13) 75 =============================================== 76 77 * Improvements 78 * Implemented decoding of NETLINK_NETFILTER netlink message types and flags. 79 * Implemented decoding of SECCOMP_GET_ACTION_AVAIL operation of seccomp 80 syscall. 81 * Updated lists of ARPHRD_*, BPF_*, ETH_P_*, LOOP_*, MADV_*, 82 MEMBARRIER_CMD_*, MFD_*, SECCOMP_*, SO_*, SOL_*, TCP_*, and UFFD_FEATURE_* 83 constants. 84 * Added decoding of statx syscall on hppa. 85 * Updated lists of ioctl commands from Linux 4.14. 86 87 * Bug fixes 88 * Fixed powerpc personality support on powerpc64. 89 90 Noteworthy changes in release 4.19 (2017-09-05) 91 =============================================== 92 93 * Changes in behaviour 94 * Changed formatting of personality names on tile architecture in order 95 to make it in line with other multi-personality architectures. 96 * Changed field output order in struct v4l2_requestbuffers to improve in/out 97 field formatting. 98 * Changed handling of multiple signal= specifications in an injection 99 expression: multiple specification now leads to error instead of implicit 100 usage the last specification. 101 102 * Improvements 103 * Enhanced decoding of optlen argument of getsockopt syscall. 104 * Enhanced decoding of SO_LINGER option of getsockopt and setsockopt syscalls. 105 * Enhanced decoding of SO_PEERCRED option of getsockopt syscall. 106 * Enhanced decoding of IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP, 107 IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_JOIN_ANYCAST, 108 IPV6_LEAVE_ANYCAST, MCAST_JOIN_GROUP, and MCAST_LEAVE_GROUP options 109 of setsockopt syscall. 110 * Enhanced decoding of KEYCTL_DH_COMPUTE operation of keyctl syscall 111 (KDF parameters decoding). 112 * Implemented decoding of KEYCTL_RESTRICT_KEYRING operation of keyctl syscall. 113 * Enhanced decoding of UFFDIO_API ioctl command. 114 * Enhanced decoding of BPF_PROG_LOAD, BPF_MAP_CREATE, BPF_MAP_LOOKUP_ELEM, 115 and BPF_MAP_GET_NEXT_KEY commands of bpf syscall. 116 * Implemented decoding of linux socket filter programs specified 117 for SO_ATTACH_FILTER and SO_ATTACH_REUSEPORT_CBPF socket options. 118 * Implemented decoding of inet_diag_req_v2, inet_diag_req_compat, 119 packet_diag_msg, and smc_diag_msg netlink attributes of NETLINK_SOCK_DIAG. 120 * Implemented NETLINK_SELINUX protocol specific decoding. 121 * Implemented decoding of netlink message ack flags. 122 * Implemented decoding of nlmsgerr netlink attributes. 123 * Implemented basic protocol specific decoding of NETLINK_CRYPTO. 124 * Implemented decoding of crypto_user_alg netlink attributes 125 of NETLINK_CRYPTO. 126 * Implemented basic protocol specific decoding of addr, addrlabel, dcb, link, 127 mdb, neigh, neightbl, netconf, nsid, route, rule, tc, and tca messages 128 of NETLINK_ROUTE. 129 * Implemented decoding of NETLINK_KOBJECT_UEVENT messages. 130 * Improved handling of unexpected tracees (the ones that cloned with 131 CLONE_PARENT/CLONE_PTRACE or called PTRACE_TRACEME on themselves): they 132 are now PTRACE_DETACH'ed instead of PTRACE_CONT'ed. 133 * Updated lists of BPF_*, KEY_*, RWF_*, SCM_*, SO_*, and *_MAGIC constants. 134 * Added decoding of arch_prctl syscall on x86. 135 * Added decoding of seccomp, bpf, userfaultfd, membarrier, mlock2, 136 copy_file_range, preadv2, pwritev2, and statx on alpha. 137 * Added decoding of statx syscall on microblaze. 138 * Added decoding of s390_guarded_storage syscall on s390. 139 * Updated lists of ioctl commands from Linux 4.13. 140 * Enhanced manual page. 141 142 * Bug fixes 143 * Fixed printing of group_req structure on non-native personalities. 144 * Fixed output formatting of blkpg_ioctl_arg, dm_name_list, and iocb 145 structures. 146 * Fixed formatting of nul-terminated strings which have kernel-imposed size 147 limit. 148 * Fixed printing of paths that hit PATM_MAX limit in order to match kernel's 149 behaviour. 150 * Fixed build warnings on Android mips64. 151 * Fixed unused function "is_negated_errno" build warning when built 152 with clang. 153 * Fixed syscall number and arguments retrieval behaviour on sparc64 and 154 mips o32 after prctl(PR_SET_DUMPABLE, 0) makes PTRACE_PEEKTEXT impossible 155 to use if Linux kernel has commit v4.10-rc1~114^2~2. 156 * Fixed path tracing for execveat, symlink, symlinkat, inotify_add_watch, 157 and inotify_init syscalls. 158 * Fixed personality switch printing on sparc64 and risc-v. 159 160 Noteworthy changes in release 4.18 (2017-07-05) 161 =============================================== 162 163 * Improvements 164 * Implemented decoding of SCM_TIMESTAMP* control messages. 165 * Implemented decoding of netlink NLMSG_DONE messages. 166 * Implemented decoding of netlink generic nlmsg_type and nlmsg_flags. 167 * Implemented decoding of NETLINK_AUDIT, NETLINK_NETFILTER, NETLINK_ROUTE, 168 NETLINK_SELINUX, NETLINK_SOCK_DIAG, and NETLINK_XFRM message types. 169 * Implemented decoding of NETLINK_GENERIC protocol families. 170 * Implemented basic protocol specific decoding of AF_INET, AF_INET6, 171 AF_NETLINK, AF_PACKET, AF_SMC, and AF_UNIX messages of NETLINK_SOCK_DIAG. 172 * Implemented basic decoding of netlink attributes. 173 * Implemented basic protocol specific decoding of AF_INET, AF_NETLINK, 174 AF_PACKET, AF_SMC, and AF_UNIX netlink attributes of NETLINK_SOCK_DIAG. 175 * Implemented decoding of inet_diag_msg, netlink_diag_msg, and unix_diag_msg 176 netlink attributes of NETLINK_SOCK_DIAG. 177 * Updated lists of ARPHRD_*, KEYCTL_*, NDIAG_SHOW_*, RTM_*, SCM_*, SCTP_*, 178 SO_*, V4L2_*, and prctl ARCH_* constants. 179 * Updated lists of ioctl commands from Linux 4.12. 180 181 * Bug fixes 182 * In interactive mode (-I2), those signals that were blocked at startup 183 will remain blocked for the whole period of strace execution. 184 * strace no longer resets SIGCHLD handler in tracees to the default action. 185 * When traced command is terminated by a blocked signal, strace unblocks 186 that signal to ensure its own termination with the same signal. 187 * Fixed corner cases in decoding of old sigaction syscall. 188 * Fixed build with old kernel headers on mips. 189 * Fixed build on aarch64 and tile with glibc >= 2.26. 190 * Fixed build on arc and nios2. 191 192 Noteworthy changes in release 4.17 (2017-05-24) 193 =============================================== 194 195 * Changes in command line syntax 196 * Syscall classes specified in -e trace= option now have % prefix (like 197 -e trace=%process). Old style class names without leading % are still 198 supported, but considered deprecated now. 199 200 * Improvements 201 * Optimized syscall filtering. 202 * Improved representation of timestamps. 203 * Enhanced decoding of sched_setattr syscall. 204 * Added -e trace=%stat option for tracing variants of stat syscall. 205 * Added -e trace=%lstat option for tracing variants of lstat syscall. 206 * Added -e trace=%fstat option for tracing variants of fstat and fstatat 207 syscalls. 208 * Added -e trace=%%stat option for tracing syscalls used for querying file 209 status information (stat, lstat, fstat, fstatat, statx, and their 210 variations). 211 * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs 212 syscalls. 213 * Added -e trace=%fstatfs option for tracing fstatfs, fstatfs64 and fstatvfs 214 syscalls. 215 * Added -e trace=%%statfs option for tracing syscalls used for querying file 216 system statistics information (statfs-like, fstatfs-like and ustat). 217 * Added -e trace=/regex option for filtering syscalls using regular 218 expressions. 219 * Added support for prepending of question mark before syscall qualification 220 in -e trace expressions in order to suppress error in case no syscalls 221 matched the provided qualification. 222 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc, 223 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k, 224 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa 225 architectures. 226 * Implemented decoding of statx syscall. 227 * Implemented decoding of NS_* ioctl commands. 228 * Implemented decoding of the remaining V4L2_BUF_TYPE_* types. 229 * Implemented decoding of VIDIOC_[SG]_TUNER ioctl commands. 230 * Implemented decoding of NLMSG_ERROR netlink messages. 231 * Improved decoding of BPF_PROG_ATTACH command of bpf syscall. 232 * Improved decoding of misplaced parts in DM_* ioctl commands. 233 * Updated lists of ioctl commands from Linux 4.11. 234 235 * Bug fixes 236 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32. 237 * Fixed the number of arguments and tracing flags of alpha specific syscalls. 238 * Fixed decoding of old sigsuspend syscall on alpha, cris, mips, powerpc, 239 powerpc64, sh, sh64, sparc, and sparc64. 240 * Fixed decoding of sgetmask and ssetmask syscalls on 64-bit architectures. 241 * Fixed decoding of netlink messages received within struct msghdr. 242 * Worked around a bug in miscompiled aarch64 kernels leading to the 3rd 243 argument of sched_getattr syscall being not quite 32-bit. 244 * Fixed corner cases of printing inaccessible times argument of utimes 245 and futimesat syscalls. 246 247 Noteworthy changes in release 4.16 (2017-02-14) 248 =============================================== 249 250 * Improvements 251 * Implemented syscall return value injection (-e inject=SET:retval= option). 252 * Implemented signal injection (-e inject=SET:signal= option). 253 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE. 254 * Implemented decoding of all SG_* ioctl commands. 255 * Implemented decoding of ustat syscall. 256 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH, 257 and BPF_PROG_DETACH commands of bpf syscall. 258 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures. 259 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list 260 syscalls. 261 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs. 262 * Updated lists of IP_*, IPV6_*, and LOOP_* constants. 263 * Updated lists of ioctl commands from Linux 4.10. 264 * Added decoding of recently added syscalls on avr32, microblaze, ppc, 265 and ppc64. 266 267 * Bug fixes 268 * Fixed pathmatch of oldselect syscall on 64-bit architectures. 269 * Fixed decoding of mmap2 syscall on s390 when arguments are not available. 270 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*, 271 and pwritev* syscalls on x32. 272 * Fixed printing of string arguments of getxattr and setxattr syscalls 273 when -s option is used to limit the printed string size. 274 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native 275 personalities. 276 * Fixed decoding of SG_* and LOOP_* ioctl commands. 277 * Fixed build on mips with musl libc. 278 * Fixed cross-building of ioctlsort. 279 * Applied minor formatting fixes to the manual page. 280 281 Noteworthy changes in release 4.15 (2016-12-14) 282 =============================================== 283 284 * Changes in behavior 285 * Time stamps are now printed according to ISO 8601. 286 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation. 287 * The last argument of mincore, sched_getaffinity, and sched_setaffinity 288 syscalls is now formatted as an array. 289 290 * Improvements 291 * Implemented syscall fault injection (-e fault=... option). 292 * Implemented decoding of DM_* ioctl commands. 293 * Implemented decoding of attr parameter of perf_event_open syscall. 294 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls. 295 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls. 296 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations 297 of prctl syscall. 298 * Implemented PTRACE_GETREGS API support on m68k. 299 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC, 300 and V4L2_* constants. 301 * Updated lists of ioctl commands from Linux 4.9. 302 * Added decoding of recently added syscalls on arc, x32, and xtensa. 303 * Enhanced manual page. 304 305 * Bug fixes 306 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups, 307 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie, 308 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend, 309 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid, 310 setgroups, setns, unshare, and utimes syscalls. 311 * Fixed handling of verbose flag in printing of controls array 312 of struct v4l2_ext_controls. 313 * Fixed omission of field names in the output of capability, sigaction, 314 sigevent, statfs, timespec, timeval, and utimbuf structures. 315 * Fixed printing of unknown syscalls in siginfo structure. 316 * Fixed decoding of ioctl constants on m68k. 317 * Fixed cris architecture support. 318 * Fixed cross build when host compiler does not support the same 319 set of warning flags as the cross compiler. 320 * Fixed build on SLE10 and SLE11. 321 322 Noteworthy changes in release 4.14 (2016-10-04) 323 =============================================== 324 325 * Changes in behavior 326 * When using -p option without a command and no processes has been attached, 327 strace exits with exit status 1. 328 329 * Improvements 330 * Added printing of the mode argument of open and openat syscalls 331 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846). 332 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set. 333 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime, 334 and aio family syscalls. 335 * Implemented fetching of the 7th subcall argument on mips o32. 336 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC 337 constants. 338 * Updated lists of ioctl commands from Linux 4.8. 339 * Added decoding of new syscalls on sh and sh64. 340 * Added RISC-V architecture support. 341 342 * Bug fixes 343 * Marked io_setup and io_destroy as memory mapping related syscalls. 344 * Fixed leakage of placeholder descriptors to tracees. 345 * Fixed printing of mode_t, umode_t, and umask types. 346 * Fixed decoding of iovec arrays without a limit on total data size. 347 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead, 348 and ipc family syscalls. 349 * Fixed decoding of invalid syscalls mapped to indirect subcalls. 350 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native 351 personalities. 352 * Fixed decoding of PTRACE_DETACH on sparc and sparc64. 353 * Fixed decoding of struct stat64 on sparc64. 354 * Fixed decoding of uid and gid-related syscalls on sparc64. 355 * Fixed decoding of the forth argument of semctl syscall on sparc64. 356 * Fixed values of tty ioctl constants on sparc64. 357 * Fixed sparc personality support on sparc64. 358 359 Noteworthy changes in release 4.13 (2016-07-26) 360 =============================================== 361 362 * Improvements 363 * Implemented a general netlink socket parser. 364 * Enhanced decoding of socket addresses. 365 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures. 366 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname, 367 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls. 368 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*, 369 and *_MAGIC constants. 370 * Updated lists of ioctl commands from Linux 4.7. 371 372 * Bug fixes 373 * Fixed decoding of pid_t argument of prlimit64 syscall. 374 * Fixed sign extension issues in the parser of struct rusage. 375 * Fixed race condition in decoding of timeout argument of recvmmsg and 376 rt_sigtimedwait syscalls. 377 * Fixed build with fresh linux kernel headers. 378 379 Noteworthy changes in release 4.12 (2016-05-31) 380 =============================================== 381 382 * Improvements 383 * Implemented simultaneous use of -p option and tracing of a command. 384 (addresses Debian bug #549942). 385 * Implemented caching of netlink conversations to reduce amount of time 386 spent in decoding socket details in -yy mode. 387 * Implemented -yy mode decoding of protocol:portid pairs associated with 388 netlink socket descriptors. 389 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls. 390 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice 391 syscalls. 392 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands. 393 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands. 394 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents, 395 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod, 396 mknodat, personality, poll, ppoll, quotactl, rt_sigpending, 397 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity, 398 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs, 399 statfs64, tgkill, waitid, and xattr family syscalls. 400 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha. 401 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc. 402 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc. 403 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha. 404 * Added decoding of fadvise64 and fadvise64_64 on s390. 405 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*, 406 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants. 407 * Updated lists of ioctl commands from Linux 4.6. 408 409 * Bug fixes 410 * Fixed build on arc, metag, nios2, or1k, and tile architectures. 411 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures. 412 * Fixed decoding of mlock2 syscall on sparc. 413 * Fixed decoding of osf_shmat syscall on alpha. 414 * Fixed decoding of syscalls unknown to the kernel on s390/s390x. 415 (addresses Debian bug #485979 and Fedora bug #1298294). 416 * Fixed decoding of preadv syscall in case of short read. 417 * Fixed decoding and dumping of readv syscall in case of short read. 418 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read. 419 * Fixed decoding of mincore syscall's last argument. 420 * Fixed remaining errors in mapping between syscall numbers and numbers 421 of syscall arguments. 422 * Applied various fixes to strace-graph script. 423 424 Noteworthy changes in release 4.11 (2015-12-21) 425 =============================================== 426 427 * Changes in behavior 428 * Some syscalls have different names depending on architecture and 429 personality. In these cases, syscall filtering and printing now 430 consistently uses the names that match corresponding __NR_* kernel 431 macros of the tracee's architecture and personality. 432 * Added strace prefix to all diagnostic messages. 433 434 * Improvements 435 * Enhanced and extended test suite. 436 * Implemented reliable tracing of processes whose personality differs 437 from the personality of strace, fixed decoding of 32-bit personality 438 syscalls on 64-bit architectures. 439 * When some data referenced by syscall arguments is irrelevant or cannot 440 be read from tracee's memory, strace now prints its address consistently. 441 * When a syscall is restarted using restart_syscall mechanism, strace now 442 shows the syscall name on architectures that expose this information. 443 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init, 444 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket, 445 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and 446 F_DUPFD_CLOEXEC fcntl commands, as file descriptors. 447 * Optimized decoding of indirect socket syscalls. 448 * Implemented decoding of nanoseconds along with seconds in stat family 449 syscalls (addresses Fedora bug #1251176). 450 * Implemented decoding of struct statfs.f_flags in statfs syscall. 451 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch 452 in SIGSYS signal. 453 * Implemented decoding of indirect syscall on mips o32. 454 * Implemented decoding of IPPROTO_IP control messages. 455 * Implemented decoding of setsockopt syscall multicast arguments. 456 * Enhanced decoding of struct sigevent. 457 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty, 458 and v4l2 ioctl syscall arguments. 459 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents, 460 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom, 461 sendfile, setsockopt, and shmctl syscalls. 462 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load, 463 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at, 464 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls. 465 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*, 466 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*, 467 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t 468 constants. 469 * Added Nios II architecture support. 470 * Added new syscall entries to match Linux 4.4. 471 472 * Bug fixes 473 * Fixed potential short read of strings from tracee's memory. 474 * Fixed -qq option in conjunction with -o option. 475 * Fixed filtering of <unavailable> syscalls. 476 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures 477 with 64-bit aligned structures. 478 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2 479 syscall flags arguments. 480 * Fixed decoding of 4th argument of clock_nanosleep syscall. 481 * Fixed decoding of getpagesize syscall on m68k. 482 * Fixed decoding of getrandom and seccomp syscalls on aarch64. 483 * Fixed decoding of timezone argument of gettimeofday and settimeofday 484 * syscalls. 485 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc, 486 and sparc64. 487 * Fixed decoding of pipe syscall on alpha and mips. 488 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64. 489 * Fixed decoding of signal mask argument of pselect6 syscall on x32. 490 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k, 491 and x32. 492 * Fixed decoding of 4th argument of semctl indirect syscall. 493 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k. 494 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi. 495 * Fixed decoding of struct dirent on x32. 496 * Fixed decoding of times syscall return value on mips n32 and x32. 497 * Fixed decoding of path argument of umount2 syscall 498 (addresses Debian bug #785050). 499 * Worked around a kernel bug in tracing privileged executables. 500 * Fixed various errors in mapping between syscall numbers and associated 501 information like the number of syscall arguments, the name of syscall, 502 and syscall decoder. 503 504 Noteworthy changes in release 4.10 (2015-03-06) 505 =============================================== 506 507 * Improvements 508 * Added -yy option to print protocol and address information associated with 509 socket descriptors. 510 * Extended "-e read=set" and "-e write=set" options to cover sendmsg, 511 recvmsg, sendmmsg, and recvmmsg syscalls. 512 * Implemented full 32-bit decoding of ioctl commands 513 (addresses Debian bug #692913 and Fedora bug #902788). 514 * Implemented PTRACE_GETREGS API support on ia64. 515 * Implemented PTRACE_GETREGS API support on mips. 516 * Implemented PTRACE_GETREGSET API support on s390/s390x. 517 * Implemented decoding of getrandom and seccomp syscalls. 518 * Implemented full decoding of 64-bit capability sets. 519 * Implemented decoding of all prctl commands. 520 * Implemented decoding of parametrized ioctl commands. 521 * Implemented decoding of evdev ioctl commands. 522 * Implemented decoding of v4l ioctl commands. 523 * Implemented decoding of SG_IO v4 ioctl commands. 524 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands. 525 * Implemented decoding of FALLOC_FL_* fallocate flags. 526 * Implemented decoding of rt_sigreturn signal mask on aarch64, 527 x32, and x86_64. 528 * Enhanced socket decoder to support bluetooth sockets. 529 * Enhanced decoding of unlisted ioctl commands. 530 * Enhanced decoding of getsockopt and setsockopt syscall. 531 * Enhanced decoding of sysinfo syscall. 532 * Enhanced decoding of struct cmsghdr. 533 * Enhanced decoding of wait status. 534 * Enhanced aio support on non-x86 architectures by using external libaio.h. 535 * Added O_TMPFILE to the list of recognized open mode flags. 536 * Updated the list of filesystem type constants that is used in decoding 537 statfs family syscalls. 538 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*, 539 and TFD_* constants. 540 * Updated lists of signal constants from Linux 3.19. 541 * Updated lists of errno constants from Linux 3.19. 542 * Updated lists of ioctl commands from Linux 3.9. 543 * Added new syscall entries to match Linux 3.19. 544 545 * Bug fixes 546 * Fixed various errors in mapping between syscall numbers and associated 547 information like the number of syscall arguments, the name of syscall, 548 and syscall decoder. 549 * Fixed quoting issues in printing descriptors, filenames, network interface 550 names, struct utsname members, device/volume names of BLK* ioctl commands. 551 * Fixed uid_t/git_t decoding. 552 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders. 553 * Fixed potential open flags truncation on some architectures. 554 * Fixed decoding of struct ifreq.ifr_name. 555 * Fixed decoding of SIOCSIFNAME ioctl command. 556 * Fixed decoding of RENAME_* renameat2 flags. 557 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures. 558 * Fixed decoding of indirect ipc subcalls on some architectures. 559 * Fixed decoding of fanotify_mark syscall on 32-bit architectures. 560 * Fixed decoding of 32-bit stat structures on 64-bit architectures. 561 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures. 562 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures. 563 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64, 564 sparc, sparc64, mips, and s390. 565 * Fixed instruction pointer output (-i option) on architectures that support 566 several personalities. 567 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write 568 sets intersect. 569 * Fixed build on systems where struct sigaction has no sa_restorer member. 570 * Fixed build with uclibc and musl libc. 571 572 * Portability 573 * Linux kernel >= 2.5.46 is required. 574 Older versions without a decent PTRACE_SETOPTIONS support will not work. 575 * On mips, linux kernel >= 2.6.15 is required. 576 Older versions without a decent PTRACE_GETREGS support will not work. 577 * On s390 and s390x, linux kernel >= 2.6.27 is required. 578 Older versions without a decent PTRACE_GETREGSET support will not work. 579 580 Noteworthy changes in release 4.9 (2014-08-15) 581 ============================================== 582 583 * Changes in behavior 584 * Disabled OABI support on ARM EABI systems by default, 585 added --enable-arm-oabi option to enable it at configure time. 586 587 * Improvements 588 * Added experimental -k option to print stack trace after each traced syscall. 589 * Added -w option to produce stats on syscall latency. 590 (addresses Debian bug #457497). 591 * Added ARC architecture support. 592 * Added PTRACE_GETREGS API support on PowerPC. 593 * Enhanced Bionic libc and musl libc support. 594 * Enhanced tracing of x86 personality processes on x86_64 and x32. 595 * Enhanced tracing of ARM personality processes on AArch64. 596 * Enhanced 32/64bit personality detection on PowerPC. 597 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl, 598 renameat2, and request_key syscalls. 599 * Robustified decoding of select, pselect, and io_submit syscalls. 600 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl, 601 setdomainname, sethostname, setns, and sync_file_range syscalls. 602 * Enhanced decoding of signal bitmasks. 603 * Enhanced decoding of file descriptors. 604 * Enhanced siginfo_t decoding. 605 * Enhanced PF_NETLINK decoding. 606 * Updated CLOCK_* constants 607 (addresses Fedora bug #1088455). 608 * Added new syscall entries to match Linux 3.16. 609 610 * Bug fixes 611 * Added shmat and shmdt to the set of memory mapping related syscalls. 612 * Fixed detaching from stopped processes. 613 * Fixed fanotify_mark decoding on 32bit architectures. 614 * Fixed offset decoding in preadv and pwritev syscalls. 615 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode. 616 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument. 617 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict 618 (addresses Fedora bug #993384). 619 * Miscellaneous corrections in the manual page. 620 (Addresses Debian bug #725987). 621 622 Noteworthy changes in release 4.8 (2013-06-03) 623 ============================================== 624 625 * Changes in behavior 626 * In case of normal strace termination, when the trace output is 627 redirected to a pipe, strace now closes it and waits for the pipe 628 process termination before exit. 629 630 * Improvements 631 * Implemented tracing using PTRACE_SEIZE API (when available). 632 * Implemented more reliable PTRACE_GETREGSET-based process personality 633 detection on x86-64 and x32 (when available). 634 * Added -e trace=memory option for tracing memory mapping related syscalls. 635 * Documented -b option. 636 * Allowed exit status messages to be suppressed by giving -q option twice. 637 * Added AArch64 architecture support 638 (addresses Debian bug #693074 and Fedora bug #969858). 639 * Added support for OpenRISC 1000, Meta, and Xtensa architectures. 640 * Added tilegx personality support for Tile. 641 * Enhanced support of NOMMU architectures. 642 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and 643 quotactl syscalls. 644 * Added new syscall entries to match Linux 3.9. 645 * Regenerated the list of common ioctl names from Linux 3.9. 646 * Updated the list of errno constants. 647 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*, 648 PTRACE_O_*, and TCP_* constants. 649 * Implemented decoding of UBI ioctls. 650 * Removed redundant "*32" ioctl names. 651 652 * Bug fixes 653 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels 654 (addresses Fedora bug #659382). 655 * Fixed kernel release string parsing 656 (addresses Debian bug #702309). 657 * Fixed decoding of *xattr syscalls 658 (addresses Fedora bug #885233). 659 * Fixed handling of files with 64-bit inode numbers by 32-bit strace 660 (addresses Fedora bug #912790). 661 * Fixed tracing forks on SPARC. 662 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread, 663 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl, 664 and truncate64 syscalls. 665 * Fixed categories of multiple syscalls on most of supported architectures. 666 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls. 667 * Fixed decoding of multiple 32-bit personality syscalls on x32. 668 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC, 669 S390x, and Tile architectures. 670 * Fixed semtimedop decoding on S390x. 671 * Fixed sram_alloc decoding on Blackfin. 672 * Fixed build when process_vm_readv is a stab. 673 * Fixed build with older versions of libaio.h. 674 675 Noteworthy changes in release 4.7 (2012-05-02) 676 ============================================== 677 678 * Changes in behavior 679 * strace no longer suspends waitpid until there is a child 680 for waitpid'ing process to collect status from. 681 * strace no longer detaches from a tracee which is supposed 682 to be going to die. 683 * strace now issues a new message: "+++ exited with EXITCODE +++" 684 which shows exact moment strace got exit notification, 685 analogous to existing "+++ killed by SIG +++" message. 686 687 * Improvements 688 * Added x32 personality support (x86_64 architecture). 689 * Added -y and -P options to print file descriptor paths and 690 filter by those paths. 691 * Added -I option to control strace interactivity. 692 * Allowed -p option to take comma or whitespace-separated list of PIDs. 693 * Added strace_log_merge script helper to merge timestamped "strace -ff" 694 log files. 695 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages, 696 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev, 697 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list, 698 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls. 699 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit, 700 listxattr, setrlimit and swapon syscalls. 701 * Implemented decoding of loop and mtd ioctls. 702 * Added syscall entries for new linux syscalls. 703 * Added syscall entries for direct socket system calls on powerpc. 704 * Updated the list of errno constants. 705 * Updated lists of MSG_*, STA_*, and TCP_* constants. 706 * Regenerated the list of ioctl names from Linux 3.3. 707 * Enhanced switching between processes with different personalities. 708 * Enhanced signals reporting by using short signal names. 709 * Made ERESTART* messages more descriptive. 710 * Made parsing of numbers from strings more robust. 711 * Added support for compat_statfs64 and statfs64.f_flags. 712 * Changed read of data blocks to use single process_vm_readv syscall 713 (when available) instead of several PTRACE_PEEKDATA operations. 714 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS 715 operation instead of several PTRACE_PEEKUSER operations. 716 * Applied various optimizations to make strace work faster. 717 718 * Bug fixes 719 * Implemented proper handling of real SIGTRAPs on kernels supporting 720 PTRACE_O_TRACESYSGOOD. 721 (Addresses Fedora bug #162774). 722 * Fixed sockaddr_un.sun_path name in decoded output. 723 (Addresses Debian bug #554946). 724 * Fixed to avoid potential core file clobbering on exit. 725 (Addresses Debian bug #656398). 726 * Fixed a typo in documentation. 727 (Addresses Debian bug #653309). 728 * Fixed decoding of timer id returned by timer_create. 729 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding. 730 * Fixed *at syscalls flags decoding. 731 * Fixed ARM EABI 64-bit syscall's arguments decoding. 732 * Fixed semtimedop decoding on s390. 733 * Fixed osf_sigprocmask decoding on alpha. 734 * Fixed ipc and socket subcall decoding on several architectures. 735 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl, 736 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64, 737 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls. 738 * Corrected io_* syscall entries on ARM. 739 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case. 740 * Fixed logging of unfinished lines in "strace -oLOG -ff" case. 741 * Fixed build when libaio-devel is not available. 742 * Fixed configure checks for PTRACE_* constants. 743 * Fixed compilation warnings remained on several architectures. 744 745 * Portability 746 * Removed all non-Linux code. After years of neglect, that dead code 747 just hampered further strace development. 748 * Linux kernel >= 2.6.18 is recommended. Older versions might still 749 work but they haven't been thoroughly tested with this release. 750 751 Noteworthy changes in release 4.6 (2011-03-15) 752 ============================================== 753 754 * Changes in behavior 755 * Print diagnostic information about changes in personality mode to 756 standard error instead of standard output. 757 758 * Improvements 759 * Implemented a new method of following clone, fork, and vfork 760 syscalls using the Linux kernel's explicit facilities for tracing 761 creation of threads and child processes. 762 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling. 763 * Implemented decoding of TLS syscalls on m68k. 764 * Implemented biarch support on powerpc64. 765 * Implemented biarch support for getrlimit() and setrlimit(). 766 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED. 767 * Implemented SOL_SCTP socket options decoding. 768 * Added HDIO_* ioctl names. 769 (Addresses Debian bug #450953). 770 * Added LOOP_* ioctl names. 771 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants 772 to match Linux 2.6.37. 773 * Updated the list of IPPROTO_* constants to match netinet/in.h. 774 * Implemented decoding of HDIO_* and BLK* ioctls. 775 * Added MicroBlaze architecture support. 776 * Added new syscall entries to match Linux 2.6.37. 777 * Regenerated list of ioctl names from Linux 2.6.37. 778 * Enhanced signal notification decoding. 779 * Documented -C and -D options. 780 781 * Bug fixes 782 * Fixed fetching syscall arguments on m68k. 783 * Fixed an error when judging whether a process has children. 784 * Fixed get/set_robust_list syscall numbers for powerpc. 785 * Fixed a corner case in printing clone flags. 786 * Fixed cross-compiling issues. 787 * Fixed build issues on powerpc64, SH and SPARC. 788 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff, 789 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate, 790 fanotify_init, and fanotify_mark syscalls. 791 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values. 792 * Fixed biarch support in IO dumping. 793 * Fixed raw exit_group decoding. 794 * Fixed decoding of file descriptors on 64-bit architectures. 795 * Fixed a corner case in waitpid handling. 796 (Addresses Red Hat bug #663547). 797 * Fixed stat64 decoding on mips 798 (Addresses Debian bug #599028). 799 * Fixed misleading italics in the manual page. 800 (Addresses Debian bug #589323). 801 802 Noteworthy changes in release 4.5.20 (2010-04-13) 803 ================================================= 804 805 * Improvements 806 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg. 807 * Implemented basic decoding of new linux syscalls: preadv, pwritev, 808 rt_tgsigqueueinfo, perf_event_open. 809 * Enhanced decoding of recently added syscalls on non-x86 architectures 810 by replacing a bare decoder with elaborate parsers enabled earlier 811 for x86/x86-64. 812 * Implemented -C option to combine regular and -c output. 813 (Addresses Debian bug #466196) 814 * Enhanced decoding of mbind and mremap syscalls. 815 * Enhanced SOL_PACKET socket options decoding. 816 * Regenerated list of ioctl names from linux 2.6.33. 817 * Added TILE architecture support. 818 819 * Bug fixes 820 * Fixed build with Linux kernel headers 2.6.32-rc5+. 821 (Addresses Debian bug #560516 and Fedora bug #539044) 822 * Fixed build on mips. 823 * Fixed handling of Linux systems without struct statfs64. 824 * Fixed reporting signal mask by sigreturn on powerpc. 825 * Fixed potential stack buffer overflow in select decoder. 826 (Addresses Fedora bug #556678) 827 * Corrected msgsnd indirect ipccall decoding. 828 * Corrected decoding of 64bit syscalls. 829 (Addresses Debian bug #570603) 830 * Corrected getsockopt decoding on architectures where 831 sizeof(long) > sizeof(int). 832 (Addresses Debian bug #494844) 833 * Corrected decoding of epoll_pwait. 834 (Addresses Debian bug #513014) 835 * Corrected handling of killed threads. 836 837 Noteworthy changes in release 4.5.19 (2009-10-21) 838 ================================================= 839 840 * Changes in behavior 841 * When command exits, strace now exits with the same exit status. 842 If command is terminated by a signal, strace terminates itself 843 with the same signal, so that strace can be used as a wrapper 844 process transparent to the invoking parent process. 845 When using -p option, the exit status of strace is zero unless 846 there was an unexpected error in doing the tracing. 847 (Addresses Fedora bug #105371 and Debian bug #37665) 848 849 * Improvements 850 * Implemented decoding of new Linux syscalls: accept4, dup3, 851 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4. 852 * Implemented decoding of socket type flags introduced in Linux 2.6.27. 853 * Implemented decoding of accept4 socketcall. 854 * Enhanced prctl decoding. 855 * Enhanced nanosleep decoding. 856 * Enhanced ptrace decoding. 857 * Enhanced futex decoding. 858 * Enhanced CAP_* decoding. 859 * Enhanced SIOCS* ioctls decoding. 860 * Enhanced fcntl F_* flags decoding. 861 * Enhanced semop/semtimedop decoding. 862 * Updated ARM architecture support. 863 * Added Blackfin architecture support. 864 * Added AVR32 architecture support. 865 * Added CRIS architecture support. 866 * Made strace detect when traced process suddenly disappeared. 867 868 * Bug fixes 869 * Fixed syscall numbers for tee and sync_file_range. 870 (Addresses Debian bug #503124) 871 * Fixed several bugs in strings decoder, including potential heap 872 memory corruption. 873 (Addresses Fedora bugs #470529, #478324 and #511035) 874 * Marked sendfile(2) as a network syscall. 875 (Addresses Debian bug #509499) 876 * Fixed accept(2) decoding. 877 (Addresses Debian bug #507573) 878 * Fixed sigtimedwait(2) decoding. 879 * Fixed build on ARM EABI. 880 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576) 881 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures. 882 (Addresses Red Hat bug #471169) 883 * Fixed display of 32-bit argv array on 64-bit architectures. 884 (Addresses Fedora bug #519480) 885 * Fixed display of 32-bit struct sigaction on 64-bit architectures. 886 * Fixed HPPA architecture support. 887 (Addresses Debian bugs #437928 and #546619) 888 889 Changes in 4.5.18 890 ============== 891 * Bug fixes. 892 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag. 893 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN. 894 895 Changes in 4.5.17 896 ============== 897 * Many bug fixes. 898 * -F is now deprecated, -f has traced vfork too on Linux for a long time now. 899 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits. 900 * Improved output for prctl system call on Linux. 901 * Improved support for Linux/ARM. 902 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND. 903 904 Changes in 4.5.16 905 ============== 906 * Bug fixes. 907 * Improved output for delete_module, futex, and mbind system calls on Linux. 908 * Improved output for SG_IO ioctls on Linux. 909 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd, 910 eventfd, getcpu, epoll_pwait. 911 912 Changes in 4.5.15 913 ============== 914 * Bug fixes. 915 * Several biarch improvements. 916 * Improved output for adjtimex, sysctl, quotactl, mount, umount. 917 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare. 918 919 Changes in 4.5.14 920 ============== 921 * Bug fixes. 922 * Accept numeric system calls in -e. 923 924 Changes in 4.5.13 925 ============== 926 * Bug fixes. 927 * Introduce "-e trace=desc". 928 929 Changes in 4.5.12 930 ============== 931 * Bug fixes. 932 * Better x86-64 support for IA32 processes. 933 * Update PowerPC system calls. 934 * Better printing for Linux aio system calls. 935 936 Changes in 4.5.11 937 ============== 938 * Quick fix release for build issues. 939 * One fix for Linux/ARM system call table. 940 941 Changes in 4.5.10 942 ============== 943 * Bug fixes. 944 * Print fault address for SIGSEGV/SIGBUS signals when available. 945 946 Changes in 4.5.9 947 ============== 948 * Bug fixes. 949 * Improve socket ioctl printing. 950 * Update Linux/IA64 syscall list. 951 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes. 952 * Improve mount flags printing. 953 * Support symbolic printing of x86_64 arch_prctl parameters. 954 955 Changes in 4.5.8 956 ============== 957 * Bug fixes. 958 * Update syscall tables for Alpha, ARM, HPPA. 959 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid. 960 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*. 961 * Improve ioctl command name matching. 962 * Print RTC_* ioctl structure contents. 963 * Support newer RLIMIT_* values. 964 * Print struct cmsghdr details in sendmsg. 965 966 Changes in 4.5.7 967 ============== 968 * Bug fixes. 969 * Print attribute values in *xattr system calls on Linux. 970 * Include pread and pwrite calls in -e read and -e write tracing. 971 * Update SO_* and IP_* value lists and add IPV6_* values for socket options. 972 * Print clock_t values symbolically in Linux clock_* system calls. 973 974 Changes in 4.5.6 975 ============== 976 * Bug fixes, Linux ioctl updates. 977 * David Miller contributed support for Linux/SPARC64. 978 979 Changes in 4.5.5 980 ============== 981 * Just bug fixes. 982 983 Changes in 4.5.4 984 ============== 985 * Update Linux ioctl lists. 986 * Update PF_* and AF_* value lists. 987 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed. 988 989 Changes in 4.5.3 990 ============== 991 * Bug fixes. 992 * On Linux using NPTL threads, -p will now attach to all threads in a process. 993 * Handle new mq_* system calls in Linux 2.6.6 and later. 994 995 Changes in 4.5.2 996 ============== 997 * Bug fixes. 998 * Report some new VM_* bit values on Linux. 999 * Better output for Linux sched_* system calls. 1000 1001 Changes in 4.5.1 1002 ============== 1003 * Bug fixes. 1004 * Display multiple ioctl name matches on Linux. 1005 1006 Changes in 4.5 1007 ============== 1008 * New port to AMD's x86-64 architecture. One strace binary can 1009 handle both new x86-64 and old i386 processes. 1010 * Fixed support for LFS64 calls. 1011 * New switch -E to add/remove environment variables for the command. 1012 * Merged s390/s390x port. 1013 * Trace an unbounded number of processes. 1014 * Handle numerous new system calls in Linux 2.5, and new threads semantics. 1015 * Fixed bugs with attach/detach leaving things stopped. 1016 * Fixed traced process seeing ECHILD despite live, traced children 1017 in waitpid calls with WNOHANG. 1018 * Stuart Menefy contributed a port to Linux/SH. 1019 * Stephen Thomas contributed a port to Linux/SH64. 1020 * Many other bug fixes. 1021 1022 Changes in 4.4 1023 ============== 1024 * Fix Linux/ia64 support, looks like someone renamed a few things on us 1025 * Fix the ioctl setup for Linux, turned out it did not really work. 1026 Improve the ioctl extractor as well so we decode some more ones. 1027 1028 Changes in 4.3.1 1029 ================ 1030 * compile fixes for Linux/mips 1031 1032 Changes in 4.3 1033 ============== 1034 * Linux ia64 and hppa ports added 1035 * The usual Linux syscall updates (includes 32bit uid/gid support), 1036 * Linux ioctl list updated 1037 * Support IPv6 scope ids 1038 * FreeBSD/i386 port added 1039 * UnixWare and Solaris updates 1040 * Better support for tracing multithreaded processes in Linux 1041 1042 Changes in 4.2 1043 ============== 1044 * Compiles on glibc2.0 systems again 1045 * Linux/S390 port added 1046 * The usual Linux syscall updates 1047 * we can follow fork on arm now 1048 1049 Changes in 4.1 1050 ================ 1051 * Linux/MIPS port added 1052 * Lots of Linux updates again 1053 * Improved IPv6 support 1054 * Add strace-graph 1055 1056 Changes in 4.0.1 1057 ================ 1058 * Minor bugfixes 1059 * Compiles on glibc2.0 systems again 1060 1061 Changes in 4.0 1062 ============== 1063 * Get stat structure properly on Linux 64bit archs 1064 * Personalities work again 1065 * Compile correctly on SunOS again 1066 * IRIX64 updates 1067 * Solaris updates 1068 1069 Changes in 3.99.1 1070 ================= 1071 * Linux (ultra)sparc fixes 1072 * Linux alpha fixes 1073 * Minor cleanups 1074 1075 Changes in 3.99 1076 =============== 1077 * New maintainer 1078 * add support for more Linux architectures (powerpc, sparc, arm) 1079 * support lots more Linux syscalls 1080 * fix signal handling 1081 * add IPX and IPIP support 1082 * check stray syscall after execv 1083 * fix hanging children 1084 1085 Changes in version 3.1 1086 ====================== 1087 1088 * Irix5 is supported 1089 * Linux 68k is supported 1090 * Linux alpha is supported 1091 * configure is upgraded to autoconf 2.x 1092 * using -f in combination with -e now works correctly 1093 * output can be piped to a program 1094 * tracing setuid programs works better 1095 * it is now reasonable to install strace setuid to root in some circumstances 1096 * new useful tracing names like file and process to trace whole 1097 classes of system calls, e.g. -efile traces all system calls that 1098 take a file name as an argument 1099 * IPC calls on SunOS 4.1.x are decoded 1100 * Linux program memory is reliably dereferenced 1101 * Linux decodes at least the name of all syscalls as of pre2.0.4 1102 * various cosmetic changes and bug fixes 1103 1104 Changes from versions 2.x to version 3.0 1105 ======================================== 1106 1107 * filename arguments are neither abbreviated nor stringified 1108 * string arguments are now true C strings using octal instead of hex by default 1109 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY) 1110 * by default the output for multiple processes now goes into one file 1111 * all structures, vectors, bitsets, etc. use consistent output formats 1112 * the -c option now means count calls, -i does what the old -c used to do 1113 1114 New Features in version 3.0 1115 =========================== 1116 1117 * non-ascii strings can be optionally printed entirely in hex 1118 * the output format is readable when multiple processes are generating output 1119 * exit values are printed in an alignment column 1120 * is is possible to suppress messages about attaching and detaching 1121 * various tracing features can be enabled on a per syscall/signal/desc basis 1122 * selective tracing of syscalls 1123 * selective printing of syscall structures 1124 * selective abbreviation of long structures on a per syscall basis 1125 * selective printing of raw syscall arguments and results 1126 * selective tracing of signals 1127 * selective dumping of all I/O read from file descriptors 1128 * selective dumping of all I/O written to file descriptors 1129 * optional counting of time, calls, and errors for each syscall 1130
