This change decouples waiting for next event from reacting to it. This
makes the control flow easier to understand, and serves as a preparation
for implementing a pull-style API for LuaJIT.
* strace.c (enum trace_event): New enum.
(trace): Split into ...
(next_event, dispatch_event): ... new functions.
(main): Use them.
Dmitry V. Levin [Sat, 27 May 2017 18:58:31 +0000 (18:58 +0000)]
Enable coverage when strace is self terminated by signal
The data collected by -fprofile-arcs during program run is saved
on program exit. When program is terminated by signal, the data
is not saved. However, libgcov provides an interface to dump
the data at runtime.
* m4/ax_code_coverage.m4 (AX_CODE_COVERAGE): Add -DENABLE_COVERAGE_GCOV
to CODE_COVERAGE_CPPFLAGS.
* strace.c [ENABLE_COVERAGE_GCOV] (__gcov_flush): New prototype.
(main) [ENABLE_COVERAGE_GCOV]: Call __gcov_flush() before raise()
and sigprocmask() calls that might cause program termination.
Dmitry V. Levin [Sat, 27 May 2017 15:58:54 +0000 (15:58 +0000)]
Do not reset SIGCHLD handler in tracees to SIG_DFL
While strace resets SIGCHLD handler to the default action so that
waitpid definitely works without losing track of children, tracees
should not inherit this change.
* strace.c (struct exec_params): Add child_sa field.
(init): When setting SIGCHLD handler to SIG_DFL, save the old handler.
(exec_or_die): Restore SIGCHLD handler if it was different from SIG_DFL
at startup.
* NEWS: Mention this change.
Dmitry V. Levin [Sat, 27 May 2017 10:00:43 +0000 (10:00 +0000)]
Fix unblocking of signals in interactive mode
In interactive mode (-I2), those signals that were blocked at startup
will remain blocked for the whole period of strace execution.
* strace.c (empty_set): Rename to start_set. All users changed.
(init): Initialize start_set and blocked_set to the set of currently
blocked signals.
(startup_attach, trace): Use SIG_SETMASK instead of SIG_BLOCK.
* NEWS: Mention this change.
Dmitry V. Levin [Mon, 22 May 2017 10:48:13 +0000 (10:48 +0000)]
Fix decoding of sgetmask and ssetmask syscalls
Old ssetmask syscall takes an argument and returns a value of type int.
Old sgetmask syscall may return an error.
* signal.c (SYS_FUNC(ssetmask)): Explicitly convert the argument
and return value to unsigned int, print it using sprint_old_sigmask_val.
(SYS_FUNC(sgetmask)): Do not print the mask in case of syserror.
* tests/sxetmask.c: New file.
* tests/gen_tests.in (sxetmask): New entry.
* tests/pure_executables.list: Add sxetmask.
* tests/.gitignore: Likewise.
* NEWS: Mention this fix.
On some architectures old sigsuspend syscall takes the signal mask from
the 3rd argument, on some from the 1st. And, if it wasn't peculiar
enough, the signal mask is passed by value on all architectures except
mips where it's passed by reference.
* signal.c (SYS_FUNC(sigsuspend)): Take the signal mask from the last
argument.
* linux/alpha/syscallent.h (sigsuspend): Set nargs to 1.
* linux/crisv10/syscallent.h: Likewise.
* linux/mips/syscallent-o32.h: Likewise.
* linux/powerpc/syscallent.h: Likewise.
* linux/powerpc64/syscallent.h: Likewise.
* linux/sh/syscallent.h: Likewise.
* linux/sh64/syscallent.h: Likewise.
* linux/sparc/syscallent.h: Likewise.
* linux/sparc64/syscallent.h: Likewise.
* tests/sigsuspend.c: New file.
* tests/gen_tests.in (sigsuspend): New entry.
* tests/pure_executables.list: Add sigsuspend.
* tests/.gitignore: Likewise.
* NEWS: Mention this fix.
Recently added tests based on pure_executables.list are quite slow
by their nature, the one minute default timeout is no longer enough
for some of not so fast architectures.
* tests/init.sh (TIMEOUT_DURATION): Raise from 60 to 120.
* v4l2.c: Include "xlat/v4l2_tuner_types.h", "xlat/v4l2_tuner_capabilities.h",
"xlat/v4l2_tuner_rxsubchanses.h", and "xlat/v4l2_tuner_audmodes.h".
(print_v4l2_tuner): New function. Add decoding for VIDIOC_G/S_TUNER's arg.
(v4l2_ioctl): Add new cases for decoding VIDIOC_G/S_TUNER's arg.
* xlat/v4l2_tuner_types.in: Add V4L2_TUNER_RADIO and
V4L2_TUNER_ANALOG_TV introduced by linux kernel commit
2.5.46~39^2~23^2~4.
Add V4L2_TUNER_DIGITAL_TV introduced by linux kernel
commit v2.6.11-rc4~55^2~20.
Add V4L2_TUNER_ADC and V4L2_TUNER_RF introduced by linux kernel commit
v3.15-rc1~85^2~215.
Add V4L2_TUNER_SDR introduced by linux kernel commit v4.4-rc1~118^2~17
(as the replacement of V4L2_TUNER_ADC).
* xlat/v4l2_tuner_capabilities.in: Add V4L2_TUNER_CAP_LOW,
V4L2_TUNER_CAP_NORM, V4L2_TUNER_CAP_STEREO, V4L2_TUNER_CAP_LANG2,
V4L2_TUNER_CAP_SAP, and V4L2_TUNER_CAP_LANG1 introduced by linux kernel
commit 2.5.46~39^2~23^2~4.
Add V4L2_TUNER_CAP_HWSEEK_BOUNDED and V4L2_TUNER_CAP_HWSEEK_WRAP
introduced by linux kernel commit v3.6-rc1~28^2~306.
Add V4L2_TUNER_CAP_RDS introduced by linux commit v2.6.32-rc1~679^2~189.
Add V4L2_TUNER_CAP_RDS_BLOCK_IO and V4L2_TUNER_CAP_RDS_CONTROLS
introduced by linux kernel commit v2.6.37-rc1~64^2~110.
Add V4L2_TUNER_CAP_FREQ_BANDS introduced by linux kernel commit
v3.6-rc1~28^2~46.
Add V4L2_TUNER_CAP_HWSEEK_PROG_LIM introduced by linux kernel commit
v3.6-rc1~28^2~40.
Add V4L2_TUNER_CAP_1HZ introduced by linux kernel commit
v3.15-rc1~85^2~214.
* xlat/v4l2_tuner_audmodes.in: Add V4L2_TUNER_MODE_MONO,
V4L2_TUNER_MODE_STEREO, V4L2_TUNER_MODE_LANG2, V4L2_TUNER_MODE_SAP, and
V4L2_TUNER_MODE_LANG1 introduced by linux kernel commit
2.5.46~39^2~23^2~4.
Add V4L2_TUNER_MODE_LANG1_LANG2 introduced by linux kernel commit
v2.6.17-rc1~739^2~9.
* xlat/v4l2_tuner_rxsubchanses.in: Add V4L2_TUNER_SUB_MONO,
V4L2_TUNER_SUB_STEREO, V4L2_TUNER_SUB_LANG2, V4L2_TUNER_SUB_SAP, and
V4L2_TUNER_SUB_LANG1 introduced by linux kernel commit
2.5.46~39^2~23^2~4.
Add V4L2_TUNER_SUB_RDS introduced by linux kernel commit
v2.6.32-rc1~679^2~189.
Print time in ISO 8601 format in time syscall decoder
* print_time.c (SYS_FUNC(time)): Print timestamp stringification
(via sprinttime) for the value stored in the argument and return value
(return RVAL_STR in the latter case).
* tests/time.c (main): Update expected output.
Print string representation of timestamps in parsers of *utime* syscalls
* print_timespec.c (print_timespec_t_utime): Use sprinttime_nsec
to format a string representation of time, use tprints_comment
to print it as a comment.
* print_timeval.c (print_timeval_t_utime): New function.
(print_timeval_utimes): Use it instead of print_timeval_t.
[ALPHA] (print_timeval32_t_utime): New function.
[ALPHA] (print_timeval32_utimes): Use it instead of print_timeval32_t.
* tests/futimesat.c (print_tv): Update expected output.
* tests/utimensat.c (print_ts): Likewise.
* tests/xutimes.c (print_tv): Likewise.
Co-authored-by: Dmitry V. Levin <ldv@altlinux.org>
Negative micro/nanoseconds values are treated as invalid by kernel
anyway, and in one case (timespec_valid in include/linux/time.h)
it is even checked by conversion to unsigned long.
* print_timespec.c (timespec_fmt): Change tv_sec format to %lld and
tv_nsec format to %llu.
(print_timespec_t): Cast tv_sec to long long and process tv_nsec with
zero_extend_signed_to_ull.
(sprint_timespec): Likewise.
* print_timeval.c (timeval_fmt): Change tv_sec format to %lld and
tv_usec format to %llu.
(print_timeval_t): Cast tv_sec to long long and process tv_nsec with
zero_extend_signed_to_ull.
(sprint_timeval, print_timeval32_t, sprint_timeval32): Likewise.
* defs.h (TIMESPEC_TEXT_BUFSIZE): Update.
* tests/adjtimex.c (main): Change tv_sec printing format to %lld, cast
it to long long; change tv_usec printing format to %llu, process it with
zero_extend_signed_to_ull.
* tests/clock_nanosleep.c (main): Change tv_sec printing format to %lld,
cast it to long long; change tv_nsec printing format to %llu, process it
with zero_extend_signed_to_ull.
* tests/clock_xettime.c (main): Likewise.
* tests/futex.c (main): Likewise.
* tests/futimesat.c (print_tv): Likewise.
* tests/getrusage.c (invoke_print): Likewise.
* tests/mq_sendrecv.c (do_send, do_recv, main): Likewise.
* tests/nanosleep.c (main): Likewise.
* tests/pselect6.c (main): Likewise.
* tests/restart_syscall.c (main): Likewise.
* tests/rt_sigtimedwait.c (iterate, main): Likewise.
* tests/sched_rr_get_interval.c (main): Likewise.
* tests/semop.c (main): Likewise.
* tests/timer_xettime.c (main): Likewise.
* tests/timerfd_xettime.c (main): Likewise.
* tests/waitid.c (main): Likewise.
* tests/xetitimer.c (main): Likewise.
* tests/xettimeofday.c (main): Likewise.
* tests/xselect.c (main): Likewise.
* tests/xutimes.c (print_tv): Likewise.
* tests/wait4.c (sprint_rusage): Likewise.
* tests/waitid.c (sprint_rusage): Likewise.
* tests/utimensat.c (print_ts): Likewise.
(main): Add check for higher bits of tv_sec/tv_nsec.
Co-authored-by: Dmitry V. Levin <ldv@altlinux.org>
Refactor sprinttime: implement sprinttime_nsec and sprinttime_usec
that handle nanoseconds and microseconds, respectively.
Always print raw values of time data fields, format string
representations of time as comments.
* defs.h (sprinttime): Change argument type from time_t to long long.
(sprinttime_nsec, sprinttime_usec): New prototypes.
* util.c (sprinttime_ex, sprinttime_nsec, sprinttime_usec): New
functions.
(sprinttime): Turn into a thin wrapper around sprinttime_ex.
* stat.h (struct strace_stat): Add has_nsec field.
* fetch_struct_stat.c (HAVE_NSEC): New macro.
(fetch_struct_stat): Initialize has_nsec field with HAVE_NSEC.
* fetch_struct_stat64.c (HAVE_NSEC): New macro.
(fetch_struct_stat64): Initialize has_nsec field with HAVE_NSEC.
* print_struct_stat.c (print_struct_stat) <PRINT_ST_TIME>:
Print raw values of time fields, use sprinttime_nsec to format a string
representation of time, use tprints_comment to print it as a comment.
* statx.c (SYS_FUNC(statx)) <PRINT_FIELD_TIME>: Likewise.
* utime.c (SYS_FUNC(utime)): Print raw values of struct utimbuf.actime
and struct utimbuf.modtime fields, use sprinttime to format a string
representation of time, use tprints_comment to print it as a comment.
* tests/tests.h (print_time_t_nsec): Add int argument.
* tests/print_time.c (print_time_t_ex): New function.
(print_time_t_nsec): Add int argument, turn into a thin wrapper around
print_time_t_ex.
* tests/utime.c (main): Update expected output.
* tests/xstatx.c [!IS_STATX] (HAVE_NSEC): New macro.
[!IS_STATX] (PRINT_ST_TIME), [IS_STATX] (PRINT_FIELD_TIME): Update
expected output.
* NEWS: Mention this timestamps representation improvement.
Co-authored-by: Dmitry V. Levin <ldv@altlinux.org>
qualify: add syntax for optional non-matching syscall qualification
It may be useful in case syscall is not present on the target
architecture.
* qualify.c (qualify_syscall): Add ignore_fail flag, set it to true
in case syscall qualification is led by a question mark(s).
* strace.1 (.SS Filtering): Document ability to use question marks
in syscall qualification.
linux/*/syscallent*.h part is updated automatically by:
sed -i 's/\(TSF\),[[:space:]]\?/\1|TSFA,/' linux/*/syscallent*.h
sed -i 's/\(TFSF\),/\1|TSFA,/' linux/*/syscallent*.h
sed -i 's/0\(,.*ustat\)/TSFA\1/' linux/*/syscallent*.h
* tests/gen_tests.in (sched): New entry.
* tests/sched.in: New file, derived from a set of tests in sched.test.
* tests/sched.test: Remove.
* tests/Makefile.am (DECODER_TESTS): Remove sched.test.
(EXTRA_DIST): Add sched.in.
* tests/gen_tests.in (regex): New entry.
* tests/regex.in: New file, derived from a set of tests in regex.test.
* tests/regex.test: Remove.
* tests/Makefile.am (DECODER_TESTS): Remove regex.test.
(EXTRA_DIST): Add regex.in.
* tests/gen_tests.in (clock): New entry.
* tests/clock.in: New file, derived from a set of tests in clock.test.
* tests/clock.test: Remove.
* tests/Makefile.am (DECODER_TESTS): Remove clock.test.
(EXTRA_DIST): Add clock.in.
Rewrite trace_statfs.test using test_trace_expr().
* tests/gen_tests.in (trace_statfs): New entry.
* tests/trace_statfs.in: New file, derived from a set of tests
in trace_statfs.test.
* tests/trace_statfs.test: Remove.
* tests/Makefile.am (DECODER_TESTS): Remove trace_statfs.test.
(EXTRA_DIST): Add trace_statfs.in.
tests/init.sh: add helpers for running set of programs
This introduces three new helpers:
prog_set_subtract subtracts one program set from another,
test_pure_prog_set runs strace check on a set of programs,
test_trace_expr tests trace expressions.
* tests/init.sh (prog_set_subtract, test_pure_prog_set,
test_trace_expr): New functions.
* tests/xstatx.c: Use fixed "stat.sample" name for sample file.
* tests/fstat.test: Use it as an argument for -P option.
* tests/gen_tests.in (fstat64, lstat, lstat64, newfstatat, oldlstat,
oldstat, stat, stat64, statx): Likewise.
This solves problems like the need to update test suite on every
New Year's Eve.
* Makefile.am (dist-hook): Generate .year.
* copyright-year-gen: New file.
* configure.ac (copyright_year): New m4 variable, defined as the output
of copyright-year-gen script.
(AC_COPYRIGHT): Use it.
(COPYRIGHT_YEAR): New output variable and preprocessor macro.
* strace.c (print_version): Use COPYRIGHT_YEAR.
* strace.spec.in (%prep): Save the value of COPYRIGHT_YEAR autoconf
variable to .year file.
* tests/strace-V.test (config_year): New variable, derived from config.h.
Add sanity checks for $config_year and use it in expected output.
* tests/gen_tests.in (pread64-pwrite64): New entry.
* tests/pread64-pwrite64.c: (main): Skip the test if /proc/self/fd/
is not available.
* tests/pread64-pwrite64.test: Remove.
* tests/Makefile.am (DECODER_TESTS): Remove pread64-pwrite64.test.
* tests/gen_tests.in (read-write): New entry.
* tests/read-write.c: (main): Skip the test if /proc/self/fd/
is not available.
* tests/read-write.test: Remove.
* tests/Makefile.am (DECODER_TESTS): Remove read-write.test.
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