tests: check error diagnostics when exec file name is too long

* tests/options-syntax.test: Check error diagnostics when
exec file name length equals to PATH_MAX.

strace.c: minor style fixes

* strace.c (test_ptrace_seize): Remove excess braces.
(init): Wrap overly long string literal.  Add braces
to the else if branch.

strace.c: use *_func_* message printing macros where appropriate

In order to provide some additional bits of information in weird error
cases or just replace existing usages of __func__/literal function name.

* strace.c (detach): Use perror_func_msg() instead of perror_msg().
(startup_attach, open_dummy_desc, startup_child, test_ptrace_seize): Use
perror_func_msg_and_die() instead of perror_msg_and_die().
(test_ptrace_seize): Use error_func_msg_and_die() instead of
error_msg_and_die().

unwind.c: more verbose mapping overlapping diagnostic message

* unwind.c (build_mmap_cache): Change error_msg() to debug_msg(), add
information about region names and the respective start and end
addresses.

unwind.c: non-fatal handling of asprintf error

An error returned by asprintf is a poor excuse for dying.

* unwind.c (asprintf_error_str): New string constant.
(sprint_call_or_error): Replace error_msg_and_die() with
perror_func_msg() and usage of asprintf_error_str for a return value.
(queue_print): Free tmp->output line only if it is not
asprintf_error_str.

unwind.c: eliminate DPRINTF

Since DPRINTF is simply a macro that provides debugging information
along with some information about printing routine call site, now standard
debug_func_* macros are deemed to be a suitable replacement.

* unwind.c (DPRINTF): Remove.
(build_mmap_cache, delete_mmap_cache, unwind_cache_invalidate,
unwind_print_stacktrace, unwind_captiure_stacktrace): Replace
DPRINTF(fmt, str, ...) with debug_func_msg(fmt, ...)/

strace.c: replace if (debug_flag) ... with suitable debug printing macros

* strace.c (alloc_tcb, droptcb, detach, attach_tcb, test_ptrace_seize,
init, startup_tcb): Replace if (debug_flag) error_msg(...) occurrences
with debug_error_msg(...).
(attach_tcb): Replace if (debug_flag) perror_msg(...) with
debug_perror_msg(...).
(cleanup, startup_tcb): Replace if (debug_flag) error_msg(...)
occurrences with debug_func_msg() in attempt to provide additional
information.

error_prints.h: add *_func_* printing macros

In order to reduce boilerplate for the cases when __func__ is desired
to be printed.

* error_prints.h (error_func_msg, perror_func_msg, debug_func_msg,
debug_func_perror_msg, error_func_msg_and_die, perror_func_msg_and_die):
New macro definitions.

error_prints.h: add debug print macros

* defs.h (debug_flag): Move the declaration...
* error_prints.h (debug_flag): ... here.
(debug_msg, debug_perror_msg): New macro definitions.
Include <stdbool.h> for the debug_flag declaration.

tests: check decoding of KVM ioctl commands

* tests/ioctl_kvm_run.c: New file.
* tests/ioctl_kvm_run.test: New test.
* tests/Makefile.am (DECODER_TESTS): Add ioctl_kvm_run.test.
* tests/pure_executables.list: Add ioctl_kvm_run.
* tests/.gitignore: Likewise.

Co-authored-by: Dmitry V. Levin <ldv@altlinux.org>

kvm: decode the argument of KVM_{SET, GET}_SREGS ioctl command

* configure.ac (AC_CHECK_TYPES): Add struct kvm_sregs.
* kvm.c [HAVE_STRUCT_KVM_SREGS] (kvm_ioctl_decode_sregs): New function.
(kvm_ioctl) [HAVE_STRUCT_KVM_SREGS] <KVM_SET_SREGS, KVM_GET_SREGS>:
Use it.
* linux/arch_kvm.c (arch_print_kvm_sregs): New function.
* linux/x86_64/arch_kvm.c (PRINT_FIELD_KVM_SREGS_STRUCT): New macro.
(kvm_ioctl_decode_regs_dtable, kvm_ioctl_decode_regs_segment,
arch_print_kvm_sregs): New functions.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>

kvm: decode the argument of KVM_{SET, GET}_REGS ioctl command

* configure.ac (AC_CHECK_TYPES): Add struct kvm_regs.
* linux/arck_kvm.c: New file.
* linux/x86_64/arch_kvm.c: Likewise.
* linux/i386/arch_kvm.c: Likewise.
* linux/x32/arch_kvm.c: Likewise.
* Makefile.am (EXTRA_DIST): Add them.
* kvm.c: Include "arch_kvm.c".
[HAVE_STRUCT_KVM_REGS] (kvm_ioctl_decode_regs): New function.
(kvm_ioctl) [HAVE_STRUCT_KVM_REGS] <KVM_SET_REGS, KVM_GET_REGS>: Use it.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>

kvm: decode the argument of KVM_SET_USER_MEMORY_REGION ioctl command

* configure.ac (AC_CHECK_TYPES): Add struct kvm_userspace_memory_region.
* xlat/kvm_mem_flags.in: New file.
* kvm.c: Include print_fields.h.
[HAVE_STRUCT_KVM_USERSPACE_MEMORY_REGION]: Include xlat/kvm_mem_flags.h,
(kvm_ioctl_set_user_memory_region): New function.
(kvm_ioctl) [HAVE_STRUCT_KVM_USERSPACE_MEMORY_REGION]
<KVM_SET_USER_MEMORY_REGION>: Use it.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>

Add strace mascot

* strace.svg: New file.

Co-Authored-by: Vitaly Chaykovsky <mgspeker@gmail.com>

tests: robustify attach-p-cmd.test against buggy kernels

From time to time various kernels, old and new, just go nuts
and fail attach-p-cmd.test with the following diagnostics:

 12345 --- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} ---
-12345 chdir("attach-p-cmd.test -p") = -1 ENOENT (No such file or directory)
+12345 syscall_4294967295(0xffe60934, 0x1c0, 0xffe60934, 0x1, 0xffe609b4, 0xffe60a58) = -1 (errno 38)
+12345 chdir("attach-p-cmd.test -p") = -1 ENOSYS (Function not implemented)

Let's workaround this kernel madness by rewriting the test
without use of SIGALRM.

* tests/attach-p-cmd.h: New file.
* tests/Makefile.am (EXTRA_DIST): Add attach-p-cmd.h.
* tests/attach-p-cmd-cmd.c: Include "attach-p-cmd.h".
(write_pidfile, wait_for_peer_invocation): New functions.
(main): Use them.
* tests/attach-p-cmd-p.c: Include <time.h> and "attach-p-cmd.h".
(wait_for_peer_invocation, wait_for_peer_termination): New functions.
(main): Use them.  Do not raise SIGALRM, use nanosleep after peer
termination.

tests: robustify ipc_msgbuf.test against broken libc

glibc between commits glibc-2.25~130 and glibc-2.26~740 had broken
msgctl(IPC_RMID) on hppa: this operation always failed with EINVAL
because of inappropriate use of IPC_64 flag.  Similar issues were
fixed on other niche architectures.  Let's workaround these issues
by skipping the test in case of msgctl(IPC_RMID) failure.

* tests/ipc_msgbuf.c (cleanup): Change return type to int,
return 77 in case of msgctl(IPC_RMID) failure.
(main): Explicitly invoke cleanup() at the end.

kvm: decode the argument of KVM_CREATE_VCPU ioctl command

* kvm.c (kvm_ioctl_create_vcpu): New function.
(kvm_ioctl) <KVM_CREATE_VCPU>: Use it.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>

kvm: handle KVM_CREATE_VM ioctl command

* kvm.c (kvm_ioctl): Handle KVM_CREATE_VM command.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>

kvm: handle KVM_RUN, KVM_GET_VCPU_MMAP_SIZE, and KVM_GET_API_VERSION ioctl commands

* kvm.c (kvm_ioctl): Handle KVM_RUN, KVM_GET_VCPU_MMAP_SIZE,
and KVM_GET_API_VERSION commands.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>

ioctl: add a stub for decoding kvm related ioctls

* kvm.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* configure.ac (AC_CHECK_HEADERS): Add linux/kvm.h.
* defs.h (kvm_ioctl): New prototype.
* ioctl.c (ioctl_decode) HAVE_LINUX_KVM_H]: Use kvm_ioctl.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>

strace-log-merge: work around corner cases of strace -ttt parsing

Employing strace -ttt for the logs destined to be fed to
strace-log-merge is ultimately the best solution except for the logs
that pass the following dates:

Thu Jan  1 00:00:09 UTC 1970
Thu Jan  1 00:01:39 UTC 1970
Thu Jan  1 00:16:39 UTC 1970
Thu Jan  1 02:46:39 UTC 1970
Fri Jan  2 03:46:39 UTC 1970
Mon Jan 12 13:46:39 UTC 1970
Sun Apr 26 17:46:39 UTC 1970
Sat Mar  3 09:46:39 UTC 1973
Sun Sep  9 01:46:39 UTC 2001
Sat Nov 20 17:46:39 UTC 2286
Wed Nov 16 09:46:39 UTC 5138
Fri Sep 27 01:46:39 UTC 33658
Sun May 20 17:46:39 UTC 318857
Sat Nov  7 09:46:39 UTC 3170843
Sun Jul  5 01:46:39 UTC 31690708
Sat Jan 25 17:46:39 UTC 316889355

Let's lift this limitation.

* strace-log-merge: Generate numeric-only key for sorting, use sort -n
option.

debian: add strace-log-merge to the list of installed files

* debian/strace.install: Add strace-log-merge.

Add strace-log-merge man page

* strace-log-merge.1.in: New file.
* NEWS: Mention this.
* .gitignore: Add strace-log-merge.1.
* Makefile.am (man_MANS): Likewise.
* configure.ac (AC_CONFIG_FILES): Likewise.
* debian/strace.manpages: Likewise.

strace-log-merge: add copyright header

Add initial GitLab CI support

* .gitlab-ci.yml: New file.
* travis-build.sh: Print $CC -print-multi-lib.  Print config.log
in case of configure failure.
* travis-install.sh: Check sudo availability.  Install autoconf,
automake, file, gawk, gcc-multilib, git, gzip, make, and xz-utils
for all targets.
(musl-gcc): Install ca-certificates.

mpers: fix cross-compiling

In cross builds, a target version of readelf has to be used
instead of a native one.

* configure.ac (AC_CHECK_TOOL): Add readelf.
* Makefile.am (READELF): New variable.
(mpers-m%.stamp): Pass it to $(srcdir)/mpers.sh.
* m4/mpers.m4 (st_MPERS): Pass READELF environment variable
to $srcdir/mpers_test.sh.
* mpers.sh (READELF): New variable.
Use it instead of readelf.
* maint/ioctls_sym.sh: Likewise.
* NEWS: Mention this fix.

Reported-by: Rolf Eike Beer <eb@emlix.com>

tests: fix llseek test

* tests/llseek.test: Fix typo.

INSTALL-git.md: fix typo

tests: simplify bpf test a bit

* tests/bpf.c (DEF_BPF_INIT_FIRST): New macro.
(init_BPF_MAP_CREATE_first, init_BPF_MAP_LOOKUP_ELEM_first,
init_BPF_PROG_LOAD_first, init_BPF_OBJ_PIN_first,
init_BPF_PROG_ATTACH_first, init_BPF_PROG_TEST_RUN_first,
init_BPF_PROG_GET_NEXT_ID_first, init_BPF_OBJ_GET_INFO_BY_FD_first):
Use it.

Implement decoding of BPF_OBJ_GET_INFO_BY_FD command of bpf syscall

* configure.ac (AC_CHECK_MEMBERS): Add union bpf_attr.info.info.
* bpf.c (decode_BPF_OBJ_GET_INFO_BY_FD): New function.
(SYS_FUNC(bpf)) <bpf_cmd_decoders>: Use it.
* NEWS: Mention this.
* tests/bpf.c: Add macro guard for BPF_OBJ_GET_INFO_BY_FD decoder test.
[HAVE_UNION_BPF_ATTR_INFO_INFO] (sample_BPF_OBJ_GET_INFO_BY_FD_attr):
New variable.
[HAVE_UNION_BPF_ATTR_INFO_INFO] (init_BPF_OBJ_GET_INFO_BY_FD_first,
print_BPF_OBJ_GET_INFO_BY_FD_first, init_BPF_OBJ_GET_INFO_BY_FD_attr,
print_BPF_OBJ_GET_INFO_BY_FD_attr): New functions.
(main) [HAVE_UNION_BPF_ATTR_INFO_INFO]: Use them.

Simplify union bpf_attr field checks

* configure.ac: Use AC_CHECK_MEMBERS instead of st_CHECK_UNION_BPF_ATTR
for union bpf_attr field checks as the former seems to be enough
for the case.
* m4/st_bpf.m4: Remove.

Implement decoding of BPF_*_GET_*_ID commands of bpf syscall

* configure.ac: Check for union bpf_attr.next_id.
* bpf.c (decode_BPF_PROG_GET_NEXT_ID, decode_BPF_PROG_GET_FD_BY_ID,
* decode_BPF_MAP_GET_FD_BY_ID): New functions.
(decode_BPF_MAP_GET_NEXT_ID): New macro.
(SYS_FUNC(bpf)) <bpf_cmd_decoders>: Use them.
* NEWS: Mention this.
* tests/bpf.c: Add macro guard for BPF_*_GET_*_ID decoder tests.
[HAVE_UNION_BPF_ATTR_NEXT_ID] (init_BPF_PROG_GET_NEXT_ID_first,
print_BPF_PROG_GET_NEXT_ID_first, init_BPF_PROG_GET_NEXT_ID_attr,
print_BPF_PROG_GET_NEXT_ID_attr, print_BPF_PROG_GET_FD_BY_ID_first,
print_BPF_PROG_GET_FD_BY_ID_attr, print_BPF_MAP_GET_NEXT_ID_first,
print_BPF_MAP_GET_NEXT_ID_attr): New functions.
(init_BPF_MAP_GET_NEXT_ID_first, print_BPF_MAP_GET_NEXT_ID_first,
init_BPF_MAP_GET_NEXT_ID_attr, print_BPF_MAP_GET_NEXT_ID_attr,
init_BPF_PROG_GET_FD_BY_ID_first, init_BPF_PROG_GET_FD_BY_ID_attr,
init_BPF_MAP_GET_FD_BY_ID_first, init_BPF_MAP_GET_FD_BY_ID_attr):
New macros.
(main) [HAVE_UNION_BPF_ATTR_NEXT_ID]: Use them.

Implement decoding of BPF_PROG_TEST_RUN command of bpf syscall

* configure.ac: Check for union bpf_attr.test.duration.
* bpf.c (decode_BPF_PROG_TEST_RUN): New function.
(SYS_FUNC(bpf)) <bpf_cmd_decoders>: Use it.
* NEWS: Mention this.
* tests/bpf.c: Include "print_fields.h".
Add macro guard for BPF_PROG_TEST_RUN decoder test.
[HAVE_UNION_BPF_ATTR_TEST_DURATION] (sample_BPF_PROG_TEST_RUN_attr):
New variable.
[HAVE_UNION_BPF_ATTR_TEST_DURATION] (init_BPF_PROG_TEST_RUN_first,
print_BPF_PROG_TEST_RUN_first, init_BPF_PROG_TEST_RUN_attr,
print_BPF_PROG_TEST_RUN_attr): New functions.
(main) [HAVE_UNION_BPF_ATTR_TEST_DURATION]: Use them.

bpf: update BPF_MAP_CREATE decoding

Implement decoding of union bpf_attr.numa_node field for BPF_MAP_CREATE
command introduced by linux kernel commit v4.14-rc1~130^2~196^2~1.

* configure.ac: Check for numa_node member of union bpf_attr
instead of inner_map_fd.
(decode_BPF_MAP_CREATE): Add numa_node field to the structure, print it.
* NEWS: Mention this.
* tests/bpf.c: Update macro guards of BPF_MAP_CREATE decoder test.
(init_BPF_MAP_CREATE_first, print_BPF_MAP_CREATE_attr): Update expected
output.
(init_BPF_MAP_CREATE_attr): Initialize numa_node field, update offset.

unwind.c: cleanup

* unwind.c (rebuild_cache_if_invalid): Simplify return statement.

unwind.c: fix typo in comment

* unwind.c (unwind_cache_invalidate, unwind_print_stacktrace,
unwind_capture_stacktrace): Replace strack with stack.

ipc_shm: decode hugetlb page size in shmget flags

Decode alternative hugetlb page sizes introduced by kernel commit
v3.8-rc1~175^2~36.

* ipc_shm.c [!SHM_HUGE_SHIFT] (SHM_HUGE_SHIFT): New macro.
[!SHM_HUGE_MASK] (SHM_HUGE_MASK): Likewise.
(SYS_FUNC(shmget)): Print hugetlb page size.
* tests/ipc_shm.c: Check it.

memfd_create: decode hugetlb page size

Decode alternative hugetlb page sizes introduced by kernel commit
v4.14-rc1~126^2~17.

* configure.ac (AC_CHECK_HEADERS): Add linux/memfd.h.
* memfd_create.c [HAVE_LINUX_MEMFD_H]: Include it.
[!MFD_HUGE_SHIFT] (MFD_HUGE_SHIFT): New macro.
[!MFD_HUGE_MASK] (MFD_HUGE_MASK): Likewise.
(SYS_FUNC(memfd_create)): Print hugetlb page size.
* tests/memfd_create.c: Check it.

Print the first argument of memfd_create syscall as a path

The limit imposed by the kernel on the length of memfd_create first
argument is NAME_MAX - strlen("memfd:").

* memfd_create.c (SYS_FUNC(memfd_create)): Print the first argument
using printpathn.
* tests/memfd_create.c: Check it.

mem: decode hugetlb page size in mmap flags

Decode alternative hugetlb page sizes introduced by kernel commit
v3.8-rc1~175^2~36.

* mem.c [!MAP_HUGE_SHIFT] (MAP_HUGE_SHIFT): New macro.
[!MAP_HUGE_MASK] (MAP_HUGE_MASK): Likewise.
(print_mmap_flags): Print hugetlb page size.
* NEWS: Mention it.
* tests/remap_file_pages.c: Check it.

mem: assume that MAP_TYPE is defined

Since linux kernel provided a definition of MAP_TYPE in <asm/mman.h>
as long ago as in v2.4.0, it's safe to assume that MAP_TYPE is defined.

* mem.c (print_mmap_flags) [!MAP_TYPE]: Remove.

mem: move printing of mmap_flags to a separate function

* mem.c (print_mmap_flags): New function.
(print_mmap, SYS_FUNC(remap_file_pages)): Use it.

Provide fallback definitions for SHM_EXEC constant

Although SHM_EXEC is available in <linux/shm.h> since kernel commit
v2.6.9-rc2~23^2~93^2~78, the glibc version of <sys/shm.h> did not
provide SHM_EXEC until commit glibc-2.10~238.

* xlat/shm_flags.in (SHM_EXEC): Add fallback definition.
* tests/shmxt.c (SHM_EXEC): Likewise.

Update SHM_* constants

* xlat/shm_flags.in: Add SHM_EXEC introduced by kernel commit
v2.6.9-rc2~23^2~93^2~78.
* xlat/shm_resource_flags.in: Add SHM_NORESERVE introduced by kernel
commit v2.6.15-rc1~622.
* NEWS: Mention this.
* tests/ipc_shm.c (main): Update expected output.
* tests/shmxt.c (main): Update expected output, check SHM_EXEC decoding.

Remove fallback definitions for SHM_STAT and SHM_INFO constants

These constants are universally available for quite a long time
and are used unconditionally in tests without any complaints.

* xlat/shmctl_flags.in: Remove fallback definitions.

net: fix SOL_NETLINK NETLINK_LIST_MEMBERSHIPS decoding

NETLINK_LIST_MEMBERSHIPS, unlike all other SOL_NETLINK options, requests
not just a single integer but an array of integers.  The kernel also
supports a zero optlen NETLINK_LIST_MEMBERSHIPS request.

* net.c (print_uint32): New function.
(print_getsockopt): Add ulen argument, rename len argument to rlen,
<SOL_NETLINK> Handle NETLINK_LIST_MEMBERSHIPS using print_array
and print_uint32.
(SYS_FUNC(getsockopt)): Pass ulen to print_getsockopt.
* tests/sockopt-sol_netlink.c (main): Check NETLINK_LIST_MEMBERSHIPS
decoding.

tests: check [gs]etsockopt SOL_NETLINK decoding

* tests/sockopt-sol_netlink.c: New file.
* tests/gen_tests.in (sockopt-sol_netlink): New entry.
* tests/pure_executables.list: Add sockopt-sol_netlink.
* tests/.gitignore: Likewise.

net: fix decoding of optval argument of [gs]etsockopt SOL_NETLINK

Tweak the parser to follow the kernel behaviour.

* net.c (print_getsockopt, print_setsockopt) <SOL_NETLINK>: Fetch and
print returned value as integer iff the length is >= sizeof(int),
otherwise print the address.
* NEWS: Mention this.

net: decode optname argument of [gs]etsockopt for SOL_NETLINK level

* xlat/socknetlinkoptions.in: New file.
* net.c: Include "xlat/socknetlinkoptions.h".
(print_sockopt_fd_level_name) <SOL_NETLINK>: Print name using
socknetlinkoptions.
* NEWS: Metnion this.

Update MSG_* constants

* xlat/msg_flags.in: Add MSG_ZEROCOPY introduced by kernel commit
v4.14-rc1~130^2~376^2~6.
* NEWS: Mention this.

netlink: print descriptor attributes using printfd

* nlattr.h (DECL_NLA(fd)): New prototype.
* nlattr.c (decode_nla_fd): New function.
* rtnl_link.c (ifla_xdp_nla_decoders) <IFLA_XDP_FD>: Use it.
(ifinfomsg_nla_decoders) <IFLA_NET_NS_FD>: Likewise.
* rtnl_nsid.c (rtgenmsg_nla_decoders) <NETNSA_FD>: Likewise.
* NEWS: Mention this.

maint/update_copyright_years.sh: implement concurrent execution

Analogous to the way it is done in xlat/gen.sh.

* maint/update_copyright_years.sh (MAX_JOBS): New variable, initialize
it to double the CPU count.
<while [ -n "${1:-}" ]; do case "$1" in>: Add -j option parsing.
(jobs, pids): New variables.
<git ls-files -- "$@" | grep -vFx "$IGNORED_FILES" | while read f; do>:
Execute process_file in background, count background jobs and wait
if there are too many.

maint/update_copyright_years.sh: use -efu shell mode

* maint/update_copyright_years.sh: Add -efu to shebang.  Adjust
the script for -efu shell mode.

Post-release administrivia

* NEWS: Add a header line for the next release.
* debian/changelog.in: Add a changelog entry for 4.20-1.
* strace.spec.in: Likewise.

Prepare for 4.20 release

* NEWS: Update for 4.20 release.

CREDITS.in: remove entries listed by maint/gen-contributors-list.sh

Makefile.am: use gen-contributors-list.sh for CREDITS

* Makefile.am ($(srcdir)/CREDITS): Employ maint/gen-contributors-list.sh
for the contributor list generation.

maint: make gen-contributors-list.sh suitable for generation of CREDITS

Implement various features in order to make it suitable for the
generation of the CREDITS file:
- add an option for including contributor e-mail;
- add an option to read additional list of contributors from stdin;
- add shorthand for referring to the initial commit of the branch;
- document all of the above in a help message.

* maint/gen-contributors-list.sh (print_help): New function.
(script): Rename to SCRIPT.
(SCRIPT_NORM_EMAILS, MATCH_OUT, OUT_EMAILS, OUT_NO_EMAILS, read_stdin,
include_email): New variables.
Add parsing of options, rewrite input processing.

.mailmap: add more entries to avoid duplication in CREDITS

.mailmap: sort entries

.mailmap: more deduplication

Of course there are no two persons in the whole world that share
the same name.

CREDITS.in: use UTF-8 consistently

In particular, do not use " symbols in names.

CREDITS.in: add Jiri Slaby as a contributor

Unfortunately, he wasn't mentioned in the message of the commit
v4.19-68-g48cb633, so let's fix that omission.

References: https://github.com/strace/strace/pull/16

s390, s390x: update ioctl entries from linux 4.14

* linux/s390/ioctls_arch0.h: Update from linux v4.14 using ioctls_gen.sh.
* linux/s390x/ioctls_arch0.h: Likewise.

s390x: remove some of non-s390 KVM ioctls

* linux/s390x/ioctls_arch0.h: Regenerate.

maint: remove KVM_PPC_CONFIGURE_V3_MMU ioctl from non-powerpc arches

* maint/ioctls_sym.sh (ppc_list): Update.

Update copyright headers

Headers updated semi-automatically using
maint/update_copyright_years.sh script.

* m4/mpers.m4: Update copyright years.
* tests/kcmp.c: Likewise.
* tests/membarrier.c: Likewise.

maint/update_copyright_years.sh: fix typo in help output

* maint/update_copyright_years.sh (print_help): Fix typo, disable
here-document expansion.

Move MIN, MAX, and CLAMP to macros.h

We shouldn't have to include the whole defs.h to get them.

* defs.h (MIN, MAX, CLAMP): Move ...
* macros.h: ... here.

Update .mailmap

* .mailmap (Eugene Syromyatnikov): Add work address.

debian: update debhelper compat level to 10, replace -s with -a in some calls

debian: update Standards-Version to 3.9.8

mpers.m4: check for size of long and kernel_long_t

The primary purpose of this new check is diagnostics.

* m4/mpers.m4 (st_MPERS): Check for size of long and kernel_long_t.

xlat/gen.sh: speedup xlat generation

This commit implements the following changes:
- increases the number of concurrent jobs to twice the CPU count;
- creates a circular buffer, so instead of running multiple jobs
  at once, the generator tries to keep about the same number of jobs
  being run concurrently;
- runs gen_git and gen_make concurrently in order to squeeze in
  one more bit of concurrency.

With my deeply scientific measurements, this approach achieves
up to 15% speedup with dash and about 30-40% with bash as /bin/sh
on a 4-core machine.

* xlat/gen.sh (main): Declare pids local variable, append pid of every
run job to it; increase the limit of jobs to ncpus * 2; when the limit
is reached, wait for the first pid in pids instead of resetting jobs
to zero and waiting for all the run jobs; put gen_git and gen_make
into background.

hppa: wire up statx syscall

* linux/hppa/syscallent.h [349]: Add statx entry.

tests: check signal mask transparency

Starting with commit v4.17-5-gf83b49b strace is expected
to forward the signal mask to tracees unchanged.

* tests/check_sigblock.c: New file.
* tests/set_sigblock.c: Likewise.
* tests/sigblock.test: New test.
* tests/.gitignore: Add check_sigblock and set_sigblock.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(MISC_TESTS): Add sigblock.test.

tests: check signal disposition transparency

Starting with commit v4.17-8-ge97a66f strace is expected
to forward the signal disposition to tracees unchanged.

* tests/check_sigign.c: New file.
* tests/list_sigaction_signum.c: Likewise.
* tests/set_sigign.c: Likewise.
* tests/sigign.test: New test.
* tests/.gitignore: Add check_sigign, list_sigaction_signum,
and set_sigign.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(MISC_TESTS): Add sigign.test.

tests: update futex test to accommodate the recent kernel change

Kernel commit v4.14-rc1~162^2~8 refactored futex implementation and
introduced checks for invalid shift sizes.  Accommodate this change
by allowing EINVAL in the corresponding futex checks.

* tests/futex.c (CHECK_FUTEX_GENERIC): Reset errno before the syscall.
(main) <wake_ops>: Add err2 field, describe err/err2 fields.
Add EINVAL as a possible errno to the checks that contain invalid
shift values.
Update return value check so it checks that values are strictly
as expected.

Closes: https://github.com/strace/strace/pull/16

tests: cleanup futex test

* tests/futex.c (main) <wake_ops>: Remove unused errstr field
from the structure type definition.

seccomp: decode SECCOMP_GET_ACTION_AVAIL operation

* defs.h (seccomp_ret_action): New xlat prototype.
* seccomp.c (decode_seccomp_set_mode_strict): Remove.
(SYS_FUNC(seccomp)): Decode SECCOMP_GET_ACTION_AVAIL operation.
* NEWS: Mention this.
* tests/seccomp_get_action_avail.c: New file.
* tests/gen_tests.in (seccomp_get_action_avail): New entry.
* tests/pure_executables.list: Add seccomp_get_action_avail.
* tests/.gitignore: Likewise.

Add SECCOMP_RET_KILL_PROCESS decoding support

* bpf_seccomp_filter.c [!SECCOMP_RET_ACTION]: Remove.
[!SECCOMP_RET_ACTION_FULL] (SECCOMP_RET_ACTION_FULL): Define.
(print_seccomp_filter_k): Use SECCOMP_RET_ACTION_FULL
instead of SECCOMP_RET_ACTION.
* xlat/seccomp_ret_action.in: Add SECCOMP_RET_KILL_PROCESS introduced
by linux kernel commit v4.14-rc2~15^2~3.

Rename SECCOMP_RET_KILL to SECCOMP_RET_KILL_THREAD

Follow linux kernel commit v4.14-rc2~15^2~4 and rename SECCOMP_RET_KILL
to SECCOMP_RET_KILL_THREAD.

* xlat/seccomp_ret_action.in (SECCOMP_RET_KILL): Rename
to SECCOMP_RET_KILL_THREAD.
* tests/prctl-seccomp-filter-v.c (main): Update expected output.
* tests/seccomp-filter-v.c (main): Likewise.

Update SECCOMP_* constants

* xlat/seccomp_filter_flags.in: Add SECCOMP_FILTER_FLAG_LOG introduced
by kernel commit v4.14-rc2~15^2~6.
* xlat/seccomp_ops.in: Add SECCOMP_GET_ACTION_AVAIL introduced
by kernel commit v4.14-rc2~15^2~9.
* xlat/seccomp_ret_action.in: Add SECCOMP_RET_LOG introduced
by kernel commit v4.14-rc2~15^2~5.
* NEWS: Mention this.
* tests/seccomp-filter.c (main): Update expected output.
* tests/seccomp-filter-v.c (main): Likewise.

Provide fallback definitions for SECCOMP_RET_* constants

* xlat/seccomp_ret_action.in: Add fallback definitions.

tests: robustify options-syntax.test against inquisitive musl

Workaround musl >= 1.1.17 ability to use AT_EXECFN during
program_invocation_name initialization.

* tests/options-syntax.test: Check for two valid variants
of "zeroargc strace" expected output.

Update MEMBARRIER_CMD_* constants

* xlat/membarrier_cmds.in: Add MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED
introduced by kernel commit v4.14-rc6~26.
* tests/membarrier.c (main): Update expected output.

tests: check decoding of NFNL_SUBSYS_NFT_COMPAT netlink message flags

* tests/nfnetlink_nft_compat.c (test_nlmsg_flags): New function.
(main): Use it.

tests: check decoding of NFNL_SUBSYS_NFTABLES netlink message flags

* tests/nfnetlink_nftables.c (test_nlmsg_flags): New function.
(main): Use it.

tests: check decoding of NFNL_SUBSYS_CTHELPER netlink message flags

* tests/nfnetlink_cthelper.c (test_nlmsg_flags): New function.
(main): Use it.

tests: check decoding of NFNL_SUBSYS_CTNETLINK_TIMEOUT netlink message flags

* tests/nfnetlink_cttimeout.c (test_nlmsg_flags): New function.
(main): Use it.

tests: check decoding of NFNL_SUBSYS_ACCT netlink message flags

* tests/nfnetlink_acct.c (test_nlmsg_flags): New function.
(main): Use it.

tests: check decoding of NFNL_SUBSYS_CTNETLINK_EXP netlink message flags

* tests/nfnetlink_ctnetlink_exp.c (test_nlmsg_flags): New function.
(main): Use it.

tests: check decoding of NFNL_SUBSYS_CTNETLINK netlink message flags

* tests/nfnetlink_ctnetlink.c (test_nlmsg_flags): New function.
(main): Use it.

netlink: decode NETLINK_NETFILTER netlink message flags

* netlink.c (decode_nlmsg_flags_netfilter): New function.
(nlmsg_flags): Add NETLINK_NETFILTER.
* NEWS: Mention this.

netlink: decode netlink message delete flags

* netlink.c: Include "xlat/netlink_delete_flags.h".
(decode_nlmsg_flags_crypto, decode_nlmsg_flags_route,
decode_nlmsg_flags_xfrm): Decode delete flags.
* netlink.h (NLM_F_NONREC): New macro.
* xlat/netlink_delete_flags.in: New file.
* tests/netlink_crypto.c (test_nlmsg_flags): Check this.
* tests/netlink_route.c (test_nlmsg_flags): Likewise.
* tests/netlink_xfrm.c (test_nlmsg_flags): Likewise.

netlink: refactor decode_nlmsg_flags

Refactor decode_nlmsg_flags to make it family-specific, just like
decode_nlmsg_type and decode_payload.

* netlink.c (decode_nlmsg_flags_crypto, decode_nlmsg_flags_route,
decode_nlmsg_flags_sock_diag, decode_nlmsg_flags_xfrm): New functions.
(nlmsg_flags_decoder_t): New typedef.
(nlmsg_flags): New array.
(decode_nlmsg_flags): Use it.

Workaround historic linux/netfilter/xt_osf.h deficiencies

When using linux kernel headers without commit v4.5-rc1~128^2~115^2~22
("netfilter: fix include files for compilation"), both <linux/ip.h>
and <linux/tcp.h> have to be included before <linux/netfilter/xt_osf.h>.

* configure.ac (AC_CHECK_HEADERS): Include <linux/ip.h>
and <linux/tcp.h> when checking for linux/netfilter/xt_osf.h header.
* tests/nfnetlink_osf.c: Include <linux/ip.h> and <linux/tcp.h>
before <linux/netfilter/xt_osf.h>.

tests: check decoding of NFNL_SUBSYS_NFT_COMPAT netlink message types

* configure.ac (AC_CHECK_HEADERS): Add
linux/netfilter/nf_tables_compat.h.
* tests/nfnetlink_nft_compat.c: New file.
* tests/gen_tests.in (nfnetlink_nft_compat): New entry.
* tests/pure_executables.list: Add nfnetlink_nft_compat.
* tests/.gitignore: Likewise.

tests: check decoding of NFNL_SUBSYS_NFTABLES netlink message types

* configure.ac (AC_CHECK_HEADERS): Add linux/netfilter/nf_tables.h.
* tests/nfnetlink_nftables.c: New file.
* tests/gen_tests.in (nfnetlink_nftables): New entry.
* tests/pure_executables.list: Add nfnetlink_nftables.
* tests/.gitignore: Likewise.

tests: check decoding of NFNL_SUBSYS_CTHELPER netlink message types

* configure.ac (AC_CHECK_HEADERS): Add
linux/netfilter/nfnetlink_cthelper.h.
* tests/nfnetlink_cthelper.c: New file.
* tests/gen_tests.in (nfnetlink_cthelper): New entry.
* tests/pure_executables.list: Add nfnetlink_cthelper.
* tests/.gitignore: Likewise.