1 Noteworthy changes in release 4.9 (????-??-??) 2 ============================================== 3 4 * Changes in behavior 5 * Disabled OABI support on ARM EABI systems by default, 6 added --enable-arm-oabi option to enable it at configure time. 7 8 * Improvements 9 * Added experimental -k option to print stack trace after each traced syscall. 10 * Added -w option to produce stats on syscall latency. 11 (addresses Debian bug #457497). 12 * Added ARC architecture support. 13 * Added PTRACE_GETREGS API support on PowerPC. 14 * Enhanced Bionic libc and musl libc support. 15 * Enhanced tracing of x86 personality processes on x86_64 and x32. 16 * Enhanced tracing of ARM personality processes on AArch64. 17 * Enhanced 32/64bit personality detection on PowerPC. 18 * Robustified decoding of select, pselect, and io_submit syscalls. 19 * Enhanced decoding of delete_module, fcntl, setdomainname, sethostname, 20 setns, and sync_file_range syscalls. 21 * Enhanced decoding of signal bitmasks. 22 * Enhanced decoding of file descriptors. 23 * Enhanced siginfo_t decoding. 24 * Enhanced PF_NETLINK decoding. 25 * Updated CLOCK_* constants 26 (addresses Fedora bug #1088455). 27 28 * Bug fixes 29 * Added shmat and shmdt to the set of memory mapping related syscalls. 30 * Fixed detaching from stopped processes. 31 * Fixed fanotify_mark decoding on 32bit architectures. 32 * Fixed offset decoding in preadv and pwritev syscalls. 33 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode. 34 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument. 35 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict 36 (addresses Fedora bug #993384). 37 * Miscellaneous corrections in the manual page. 38 (Addresses Debian bug #725987). 39 40 Noteworthy changes in release 4.8 (2013-06-03) 41 ============================================== 42 43 * Changes in behavior 44 * In case of normal strace termination, when the trace output is 45 redirected to a pipe, strace now closes it and waits for the pipe 46 process termination before exit. 47 48 * Improvements 49 * Implemented tracing using PTRACE_SEIZE API (when available). 50 * Implemented more reliable PTRACE_GETREGSET-based process personality 51 detection on x86-64 and x32 (when available). 52 * Added -e trace=memory option for tracing memory mapping related syscalls. 53 * Documented -b option. 54 * Allowed exit status messages to be suppressed by giving -q option twice. 55 * Added AArch64 architecture support 56 (addresses Debian bug #693074 and Fedora bug #969858). 57 * Added support for OpenRISC 1000, Meta, and Xtensa architectures. 58 * Added tilegx personality support for Tile. 59 * Enhanced support of NOMMU architectures. 60 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and 61 quotactl syscalls. 62 * Added new syscall entries to match Linux 3.9. 63 * Regenerated the list of common ioctl names from Linux 3.9. 64 * Updated the list of errno constants. 65 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*, 66 PTRACE_O_*, and TCP_* constants. 67 * Implemented decoding of UBI ioctls. 68 * Removed redundant "*32" ioctl names. 69 70 * Bug fixes 71 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels 72 (addresses Fedora bug #659382). 73 * Fixed kernel release string parsing 74 (addresses Debian bug #702309). 75 * Fixed decoding of *xattr syscalls 76 (addresses Fedora bug #885233). 77 * Fixed handling of files with 64-bit inode numbers by 32-bit strace 78 (addresses Fedora bug #912790). 79 * Fixed tracing forks on SPARC. 80 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread, 81 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl, 82 and truncate64 syscalls. 83 * Fixed categories of multiple syscalls on most of supported architectures. 84 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls. 85 * Fixed decoding of multiple 32-bit personality syscalls on x32. 86 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC, 87 S390x, and Tile architectures. 88 * Fixed semtimedop decoding on S390x. 89 * Fixed sram_alloc decoding on Blackfin. 90 * Fixed build when process_vm_readv is a stab. 91 * Fixed build with older versions of libaio.h. 92 93 Noteworthy changes in release 4.7 (2012-05-02) 94 ============================================== 95 96 * Changes in behavior 97 * strace no longer suspends waitpid until there is a child 98 for waitpid'ing process to collect status from. 99 * strace no longer detaches from a tracee which is supposed 100 to be going to die. 101 * strace now issues a new message: "+++ exited with EXITCODE +++" 102 which shows exact moment strace got exit notification, 103 analogous to existing "+++ killed by SIG +++" message. 104 105 * Improvements 106 * Added x32 personality support (x86_64 architecture). 107 * Added -y and -P options to print file descriptor paths and 108 filter by those paths. 109 * Added -I option to control strace interactivity. 110 * Allowed -p option to take comma or whitespace-separated list of PIDs. 111 * Added strace_log_merge script helper to merge timestamped "strace -ff" 112 log files. 113 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages, 114 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev, 115 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list, 116 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls. 117 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit, 118 listxattr, setrlimit and swapon syscalls. 119 * Implemented decoding of loop and mtd ioctls. 120 * Added syscall entries for new linux syscalls. 121 * Added syscall entries for direct socket system calls on powerpc. 122 * Updated the list of errno constants. 123 * Updated lists of MSG_*, STA_*, and TCP_* constants. 124 * Regenerated the list of ioctl names from Linux 3.3. 125 * Enhanced switching between processes with different personalities. 126 * Enhanced signals reporting by using short signal names. 127 * Made ERESTART* messages more descriptive. 128 * Made parsing of numbers from strings more robust. 129 * Added support for compat_statfs64 and statfs64.f_flags. 130 * Changed read of data blocks to use single process_vm_readv syscall 131 (when available) instead of several PTRACE_PEEKDATA operations. 132 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS 133 operation instead of several PTRACE_PEEKUSER operations. 134 * Applied various optimizations to make strace work faster. 135 136 * Bug fixes 137 * Implemented proper handling of real SIGTRAPs on kernels supporting 138 PTRACE_O_TRACESYSGOOD. 139 (Addresses Fedora bug #162774). 140 * Fixed sockaddr_un.sun_path name in decoded output. 141 (Addresses Debian bug #554946). 142 * Fixed to avoid potential core file clobbering on exit. 143 (Addresses Debian bug #656398). 144 * Fixed a typo in documentation. 145 (Addresses Debian bug #653309). 146 * Fixed decoding of timer id returned by timer_create. 147 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding. 148 * Fixed *at syscalls flags decoding. 149 * Fixed ARM EABI 64-bit syscall's arguments decoding. 150 * Fixed semtimedop decoding on s390. 151 * Fixed osf_sigprocmask decoding on alpha. 152 * Fixed ipc and socket subcall decoding on several architectures. 153 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl, 154 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64, 155 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls. 156 * Corrected io_* syscall entries on ARM. 157 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case. 158 * Fixed logging of unfinished lines in "strace -oLOG -ff" case. 159 * Fixed build when libaio-devel is not available. 160 * Fixed configure checks for PTRACE_* constants. 161 * Fixed compilation warnings remained on several architectures. 162 163 * Portability 164 * Removed all non-Linux code. After years of neglect, that dead code 165 just hampered further strace development. 166 * Linux kernel >= 2.6.18 is recommended. Older versions might still 167 work but they haven't been thoroughly tested with this release. 168 169 Noteworthy changes in release 4.6 (2011-03-15) 170 ============================================== 171 172 * Changes in behavior 173 * Print diagnostic information about changes in personality mode to 174 standard error instead of standard output. 175 176 * Improvements 177 * Implemented a new method of following clone, fork, and vfork 178 syscalls using the Linux kernel's explicit facilities for tracing 179 creation of threads and child processes. 180 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling. 181 * Implemented decoding of TLS syscalls on m68k. 182 * Implemented biarch support on powerpc64. 183 * Implemented biarch support for getrlimit() and setrlimit(). 184 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED. 185 * Implemented SOL_SCTP socket options decoding. 186 * Added HDIO_* ioctl names. 187 (Addresses Debian bug #450953). 188 * Added LOOP_* ioctl names. 189 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants 190 to match Linux 2.6.37. 191 * Updated the list of IPPROTO_* constants to match netinet/in.h. 192 * Implemented decoding of HDIO_* and BLK* ioctls. 193 * Added MicroBlaze architecture support. 194 * Added new syscall entries to match Linux 2.6.37. 195 * Regenerated list of ioctl names from Linux 2.6.37. 196 * Enhanced signal notification decoding. 197 * Documented -C and -D options. 198 199 * Bug fixes 200 * Fixed fetching syscall arguments on m68k. 201 * Fixed an error when judging whether a process has children. 202 * Fixed get/set_robust_list syscall numbers for powerpc. 203 * Fixed a corner case in printing clone flags. 204 * Fixed cross-compiling issues. 205 * Fixed build issues on powerpc64, SH and SPARC. 206 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff, 207 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate, 208 fanotify_init, and fanotify_mark syscalls. 209 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values. 210 * Fixed biarch support in IO dumping. 211 * Fixed raw exit_group decoding. 212 * Fixed decoding of file descriptors on 64-bit architectures. 213 * Fixed a corner case in waitpid handling. 214 (Addresses Red Hat bug #663547). 215 * Fixed stat64 decoding on mips 216 (Addresses Debian bug #599028). 217 * Fixed misleading italics in the manual page. 218 (Addresses Debian bug #589323). 219 220 Noteworthy changes in release 4.5.20 (2010-04-13) 221 ================================================= 222 223 * Improvements 224 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg. 225 * Implemented basic decoding of new linux syscalls: preadv, pwritev, 226 rt_tgsigqueueinfo, perf_event_open. 227 * Enhanced decoding of recently added syscalls on non-x86 architectures 228 by replacing a bare decoder with elaborate parsers enabled earlier 229 for x86/x86-64. 230 * Implemented -C option to combine regular and -c output. 231 (Addresses Debian bug #466196) 232 * Enhanced decoding of mbind and mremap syscalls. 233 * Enhanced SOL_PACKET socket options decoding. 234 * Regenerated list of ioctl names from linux 2.6.33. 235 * Added TILE architecture support. 236 237 * Bug fixes 238 * Fixed build with Linux kernel headers 2.6.32-rc5+. 239 (Addresses Debian bug #560516 and Fedora bug #539044) 240 * Fixed build on mips. 241 * Fixed handling of Linux systems without struct statfs64. 242 * Fixed reporting signal mask by sigreturn on powerpc. 243 * Fixed potential stack buffer overflow in select decoder. 244 (Addresses Fedora bug #556678) 245 * Corrected msgsnd indirect ipccall decoding. 246 * Corrected decoding of 64bit syscalls. 247 (Addresses Debian bug #570603) 248 * Corrected getsockopt decoding on architectures where 249 sizeof(long) > sizeof(int). 250 (Addresses Debian bug #494844) 251 * Corrected decoding of epoll_pwait. 252 (Addresses Debian bug #513014) 253 * Corrected handling of killed threads. 254 255 Noteworthy changes in release 4.5.19 (2009-10-21) 256 ================================================= 257 258 * Changes in behavior 259 * When command exits, strace now exits with the same exit status. 260 If command is terminated by a signal, strace terminates itself 261 with the same signal, so that strace can be used as a wrapper 262 process transparent to the invoking parent process. 263 When using -p option, the exit status of strace is zero unless 264 there was an unexpected error in doing the tracing. 265 (Addresses Fedora bug #105371 and Debian bug #37665) 266 267 * Improvements 268 * Implemented decoding of new Linux syscalls: accept4, dup3, 269 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4. 270 * Implemented decoding of socket type flags introduced in Linux 2.6.27. 271 * Implemented decoding of accept4 socketcall. 272 * Enhanced prctl decoding. 273 * Enhanced nanosleep decoding. 274 * Enhanced ptrace decoding. 275 * Enhanced futex decoding. 276 * Enhanced CAP_* decoding. 277 * Enhanced SIOCS* ioctls decoding. 278 * Enhanced fcntl F_* flags decoding. 279 * Enhanced semop/semtimedop decoding. 280 * Updated ARM architecture support. 281 * Added Blackfin architecture support. 282 * Added AVR32 architecture support. 283 * Added CRIS architecture support. 284 * Made strace detect when traced process suddenly disappeared. 285 286 * Bug fixes 287 * Fixed syscall numbers for tee and sync_file_range. 288 (Addresses Debian bug #503124) 289 * Fixed several bugs in strings decoder, including potential heap 290 memory corruption. 291 (Addresses Fedora bugs #470529, #478324 and #511035) 292 * Marked sendfile(2) as a network syscall. 293 (Addresses Debian bug #509499) 294 * Fixed accept(2) decoding. 295 (Addresses Debian bug #507573) 296 * Fixed sigtimedwait(2) decoding. 297 * Fixed build on ARM EABI. 298 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576) 299 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures. 300 (Addresses Red Hat bug #471169) 301 * Fixed display of 32-bit argv array on 64-bit architectures. 302 (Addresses Fedora bug #519480) 303 * Fixed display of 32-bit struct sigaction on 64-bit architectures. 304 * Fixed HPPA architecture support. 305 (Addresses Debian bugs #437928 and #546619) 306 307 Changes in 4.5.18 308 ============== 309 * Bug fixes. 310 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag. 311 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN. 312 313 Changes in 4.5.17 314 ============== 315 * Many bug fixes. 316 * -F is now deprecated, -f has traced vfork too on Linux for a long time now. 317 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits. 318 * Improved output for prctl system call on Linux. 319 * Improved support for Linux/ARM. 320 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND. 321 322 Changes in 4.5.16 323 ============== 324 * Bug fixes. 325 * Improved output for delete_module, futex, and mbind system calls on Linux. 326 * Improved output for SG_IO ioctls on Linux. 327 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd, 328 eventfd, getcpu, epoll_pwait. 329 330 Changes in 4.5.15 331 ============== 332 * Bug fixes. 333 * Several biarch improvements. 334 * Improved output for adjtimex, sysctl, quotactl, mount, umount. 335 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare. 336 337 Changes in 4.5.14 338 ============== 339 * Bug fixes. 340 * Accept numeric system calls in -e. 341 342 Changes in 4.5.13 343 ============== 344 * Bug fixes. 345 * Introduce "-e trace=desc". 346 347 Changes in 4.5.12 348 ============== 349 * Bug fixes. 350 * Better x86-64 support for IA32 processes. 351 * Update PowerPC system calls. 352 * Better printing for Linux aio system calls. 353 354 Changes in 4.5.11 355 ============== 356 * Quick fix release for build issues. 357 * One fix for Linux/ARM system call table. 358 359 Changes in 4.5.10 360 ============== 361 * Bug fixes. 362 * Print fault address for SIGSEGV/SIGBUS signals when available. 363 364 Changes in 4.5.9 365 ============== 366 * Bug fixes. 367 * Improve socket ioctl printing. 368 * Update Linux/IA64 syscall list. 369 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes. 370 * Improve mount flags printing. 371 * Support symbolic printing of x86_64 arch_prctl parameters. 372 373 Changes in 4.5.8 374 ============== 375 * Bug fixes. 376 * Update syscall tables for Alpha, ARM, HPPA. 377 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid. 378 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*. 379 * Improve ioctl command name matching. 380 * Print RTC_* ioctl structure contents. 381 * Support newer RLIMIT_* values. 382 * Print struct cmsghdr details in sendmsg. 383 384 Changes in 4.5.7 385 ============== 386 * Bug fixes. 387 * Print attribute values in *xattr system calls on Linux. 388 * Include pread and pwrite calls in -e read and -e write tracing. 389 * Update SO_* and IP_* value lists and add IPV6_* values for socket options. 390 * Print clock_t values symbolically in Linux clock_* system calls. 391 392 Changes in 4.5.6 393 ============== 394 * Bug fixes, Linux ioctl updates. 395 * David Miller contributed support for Linux/SPARC64. 396 397 Changes in 4.5.5 398 ============== 399 * Just bug fixes. 400 401 Changes in 4.5.4 402 ============== 403 * Update Linux ioctl lists. 404 * Update PF_* and AF_* value lists. 405 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed. 406 407 Changes in 4.5.3 408 ============== 409 * Bug fixes. 410 * On Linux using NPTL threads, -p will now attach to all threads in a process. 411 * Handle new mq_* system calls in Linux 2.6.6 and later. 412 413 Changes in 4.5.2 414 ============== 415 * Bug fixes. 416 * Report some new VM_* bit values on Linux. 417 * Better output for Linux sched_* system calls. 418 419 Changes in 4.5.1 420 ============== 421 * Bug fixes. 422 * Display multiple ioctl name matches on Linux. 423 424 Changes in 4.5 425 ============== 426 * New port to AMD's x86-64 architecture. One strace binary can 427 handle both new x86-64 and old i386 processes. 428 * Fixed support for LFS64 calls. 429 * New switch -E to add/remove environment variables for the command. 430 * Merged s390/s390x port. 431 * Trace an unbounded number of processes. 432 * Handle numerous new system calls in Linux 2.5, and new threads semantics. 433 * Fixed bugs with attach/detach leaving things stopped. 434 * Fixed traced process seeing ECHILD despite live, traced children 435 in waitpid calls with WNOHANG. 436 * Stuart Menefy contributed a port to Linux/SH. 437 * Stephen Thomas contributed a port to Linux/SH64. 438 * Many other bug fixes. 439 440 Changes in 4.4 441 ============== 442 * Fix Linux/ia64 support, looks like someone renamed a few things on us 443 * Fix the ioctl setup for Linux, turned out it did not really work. 444 Improve the ioctl extracter as well so we decode some more ones. 445 446 Changes in 4.3.1 447 ================ 448 * compile fixes for Linux/mips 449 450 Changes in 4.3 451 ============== 452 * Linux ia64 and hppa ports added 453 * The usual Linux syscall updates (includes 32bit uid/gid support), 454 * Linux ioctl list updated 455 * Support IPv6 scope ids 456 * FreeBSD/i386 port added 457 * UnixWare and Solaris updates 458 * Better support for tracing multithreaded processes in Linux 459 460 Changes in 4.2 461 ============== 462 * Compiles on glibc2.0 systems again 463 * Linux/S390 port added 464 * The usual Linux syscall updates 465 * we can follow fork on arm now 466 467 Changes in 4.1 468 ================ 469 * Linux/MIPS port added 470 * Lots of Linux updates again 471 * Improved IPv6 support 472 * Add strace-graph 473 474 Changes in 4.0.1 475 ================ 476 * Minor bugfixes 477 * Compiles on glibc2.0 systems again 478 479 Changes in 4.0 480 ============== 481 * Get stat structure properly on Linux 64bit archs 482 * Personalities work again 483 * Compile correctly on SunOS again 484 * IRIX64 updates 485 * Solaris updates 486 487 Changes in 3.99.1 488 ================= 489 * Linux (ultra)sparc fixes 490 * Linux alpha fixes 491 * Minor cleanups 492 493 Changes in 3.99 494 =============== 495 * New maintainer 496 * add support for more Linux architectures (powerpc, sparc, arm) 497 * support lots more Linux syscalls 498 * fix signal handling 499 * add IPX and IPIP support 500 * check stray syscall after execv 501 * fix hanging children 502 503 Changes in version 3.1 504 ====================== 505 506 * Irix5 is supported 507 * Linux 68k is supported 508 * Linux alpha is supported 509 * configure is upgraded to autoconf 2.x 510 * using -f in combination with -e now works correctly 511 * output can be piped to a program 512 * tracing setuid programs works better 513 * it is now reasonable to install strace setuid to root in some circumstances 514 * new useful tracing names like file and process to trace whole 515 classes of system calls, e.g. -efile traces all system calls that 516 take a file name as an argument 517 * IPC calls on SunOS 4.1.x are decoded 518 * Linux program memory is reliably dereferenced 519 * Linux decodes at least the name of all syscalls as of pre2.0.4 520 * various cosmetic changes and bug fixes 521 522 Changes from versions 2.x to version 3.0 523 ======================================== 524 525 * filename arguments are neither abbreviated nor stringified 526 * string arguments are now true C strings using octal instead of hex by default 527 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY) 528 * by default the output for multiple processes now goes into one file 529 * all structures, vectors, bitsets, etc. use consistent output formats 530 * the -c option now means count calls, -i does what the old -c used to do 531 532 New Features in version 3.0 533 =========================== 534 535 * non-ascii strings can be optionally printed entirely in hex 536 * the output format is readable when mutiple processes are generating output 537 * exit values are printed in an alignment column 538 * is is possible to suppress messages about attaching and detaching 539 * various tracing features can be enabled on a per syscall/signal/desc basis 540 * selective tracing of syscalls 541 * selective printing of syscall structures 542 * selective abbreviation of long structures on a per syscall basis 543 * selective printing of raw syscall arguments and results 544 * selective tracing of signals 545 * selective dumping of all I/O read from file descriptors 546 * selective dumping of all I/O written to file descriptors 547 * optional counting of time, calls, and errors for each syscall 548
