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