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Check decoding of prctl operations that take the second syscall argument
as a pointer to an integer.
* tests/prctl-arg2-intptr.c: New file.
* tests/prctl-arg2-intptr.test: New test.
* tests/.gitignore: Add prctl-arg2-intptr.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(DECODER_TESTS): Add prctl-arg2-intptr.test.
Do not treat len == -1 in any special way. All users who need the
string to be handled as a NUL-terminated string set QUOTE_0_TERMINATED
bit in user_style flags already.
* util.c (printstr_ex): Remove (len == -1) check.
* tests/printstr.c: New file.
* tests/printstr.test: New test.
* tests/.gitignore: Add printstr.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(DECODER_TESTS): Add printstr.test.
The second argument of sethostname syscall is not an unsigned long but
unsigned int. The kernel does not look at the string argument when
the length argument is too long.
* hostname.c [HAVE_LINUX_UTSNAME_H]: Include <linux/utsname.h>.
[!__NEW_UTS_LEN] (__NEW_UTS_LEN): Define.
(SYS_FUNC(sethostname)): Treat the second argument as unsigned int.
Print the first argument as a pointer when the second argument exceeds
__NEW_UTS_LEN.
* tests/sethostname.c [HAVE_LINUX_UTSNAME_H]: Include <linux/utsname.h>.
[!__NEW_UTS_LEN] (__NEW_UTS_LEN): Define.
(main): Use it. Check that the second argument of sethostname
is handled as unsigned int. Check that the first argument is printed
as a pointer when the second argument exceeds __NEW_UTS_LEN.
* tests/xattr.c (DEFAULT_STRLEN): New macro.
(main): Use it to limit the length passed to print_quoted_memory.
Print ellipsis when the list returned by listxattr is too long.
Provide scno.h with fallback definitions of all __NR_* constants known
to strace for the personbality being tested.
Some tests need just __NR_* constants without any kernel support.
Such tests can include "scno.h" after <asm/unistd.h> to get definitions
of these constants when system headers are too old.
* tests/generate_scno.c: New file.
* tests/.gitignore: Add generate_scno.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(scno.h): New rule.
(BUILT_SOURCES, CLEANFILES): Add scno.h.
x32 syscalls starting with number 512 are compat syscalls that operate
on compat types. Set COMPAT_SYSCALL_TYPES flag to these syscall entries
and make get_syscall_args truncate arguments of syscalls that have this
flag set, to avoid unpleasant alternative of adding multiple
widen_to_ulong invocations to individual syscall parsers.
preadv, pwritev, preadv2, and pwritev2 are exceptions: while these
syscalls operate on compat types, the offset argument has a regular
64-bit type, so the automatic argument truncation cannot be applied.
* defs.h (COMPAT_SYSCALL_TYPES): New macro.
* syscall.c (CST): New macro, defined to COMPAT_SYSCALL_TYPES.
* linux/ia64/syscallent.h: Do not include "../i386/syscallent.h"
unless [CST > 0].
* linux/x32/syscallent.h [512..533, 536..545]: Add CST flag.
* linux/x86_64/get_syscall_args.c (get_syscall_args): Truncate arguments
of compat syscalls to 32-bit values.
* tests/ksysent.c (CST): New macro, defined to 0.
* tests/nsyscalls.c (CST): Likewise.
On x32 p(read|write)v(|2) syscalls are implemented via compat, which
truncates len argument to unsigned int.
* tests/preadv2-pwritev2.c (main): Print vlen argument as unsigned long.
* tests/sched_xetaffinity.c (errstr): New variable.
(getaffinity, setaffinity): Initialize it.
(main): Use it. Allow getaffinity return value to be less than
its cpusetsize argument.
Workaround a bug introduced in GNU grep 2.27, for details see
https://lists.gnu.org/archive/html/bug-grep/2016-12/msg00011.html
* tests/init.sh (grep_pid_status): New function.
* tests/detach-running.test: Use it instead of grep to search
in /proc/$pid/status.
* tests/detach-sleeping.test: Likewise.
* tests/detach-stopped.test: Likewise.
* tests/fault_injection.sh: New file.
* tests/Makefile.am (EXTRA_DIST): Add it.
* tests/fault_injection-exit_group.test: Use it.
* tests/fault_injection.test: Likewise.
* tests/init.sh (kernel_version_code,
require_min_kernel_version_or_skip): New functions.
* tests/threads-execve.test: Use require_min_kernel_version_or_skip.
Due to probabilistic nature of the test, try it several times.
* tests/threads-execve.c (NUMBER_OF_ITERATIONS): Change to 1.
* tests/threads-execve.test: Iterate up to 10 times.
If strace -ttt is running too long, it might happen that time stamps
before and after its invocation differ for more than a second.
Adjust expected output to handle this rare but possible case.
* tests/strace-ttt.test: Allow any time stamp between start and finish
of strace invocation.
If strace -tt is running too long, it might happen that time stamps
before and after its invocation differ for more than a second.
Adjust expected output to handle this rare but possible case.
* tests/strace-tt.test: Allow any time stamp between start and finish
of strace invocation.
Introduce a synchronization mechanism between the tracee and its peer.
* tests/redirect.test: Change timeout file to $OUT. Let the tracee
remove $LOG, wait for $LOG removal in its peer.
Introduce a synchronization mechanism between attach-f-p and strace.
* tests/attach-f-p-cmd.c: New file.
* tests/Makefile.am (check_PROGRAMS): Add attach-f-p-cmd.
* tests/attach-f-p.c: Include <sys/stat.h>.
(main): Write to stdout instead of descriptor 3. Wait for the peer
writing to stdout.
* tests/attach-f-p.test: Assume that ./attach-f-p-cmd works.
Use $OUT for expected output. Use attach-f-p-cmd for unlocking $OUT.
Introduce a synchronization mechanism between attach-p-cmd-p
and attach-p-cmd-cmd processes.
* tests/attach-p-cmd-cmd.c: Include <errno.h> and <sys/stat.h>.
(main): Wait for the lock directory creation by attach-p-cmd-p.
* tests/attach-p-cmd-p.c: Include <errno.h> and <sys/stat.h>.
(main): Create a lock directory and wait for its removal
by attach-p-cmd-cmd.
* tests/attach-p-cmd.test: Assume that test programs work.
As a side effect, this also fixes support of negated sets
of descriptors.
* defs.h (struct number_set): New forward declaration.
(read_set, write_set): New variable prototypes.
(is_number_in_set, qualify_read, qualify_write): New function
prototypes.
(QUAL_READ, QUAL_WRITE): Change to values greater than 0xff.
* qualify.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* syscall.c (qual_desc): Remove.
(qual_options): Replace qual_desc with NULL.
(qualify): Use qualify_read and qualify_write.
(dumpio): Use is_number_in_set.
* tests/options-syntax.test: Check invalid sets of descriptors.
* tests/readv.test: Check dumping of negated sets of descriptors.
valgrind is not as transparent as strace wrt standard descriptors,
so if strace is wrapped with valgrind, the test would check valgrind
transparency properties and fail imminently.
* tests/redirect-fds.test: Skip the test when $STRACE shows a presence
of valgrind.
Change the test to allow wrappers like STRACE="valgrind ./strace".
* tests/options-syntax.test: Strip all words but last from $STRACE
variable in all contexts where the name of strace executable is expected
in its output.
As this is the type used in kernel.
* uid.c (SYS_FUNC(setgroups), SYS_FUNC(getgroups)): Print size parameter
as "%d".
* tests/getgroups.c: Update expected output.
* tests/setgroups.c: Likewise.
Co-authored-by: Elvira Khabirova <lineprinter0@gmail.com>
* uid.c (setfsuid, get_print_uid, print_gid): Use printuid.
* tests/setfsugid.c (printuid): New function.
(main): Use it to print UID/GID values.
* tests/setgroups.c: Likewise.
* tests/setugid.c (ugid2int): Remove.
(printuid): New function.
(main): Use it to print UID/GID values.
Co-authored-by: Elvira Khabirova <lineprinter0@gmail.com>
The string literal "__NR_syscall_4294967295" is semantically incorrect
as there is no such constant defined.
* syscall.c (syscall_name): Return NULL if there is no syscall
corresponding to the given number.
* defs.h (syscall_name): Document this behaviour.
* printsiginfo.c (print_si_info): Print syscall name with "__NR_" prefix
only if there is a syscall corresponding to si_syscall number; print
a plain syscall number otherwise.
* tests/ptrace.c (main): Update expected output.
* print_statfs.c: Print f_fsid as a structure containing field "val"
which, in turn, is an array of two elements that used to be printed
as members of f_fsid structure.
* tests/statfs.expected: Update expected output.
* tests/xstatfsx.c (print_statfs): Likewise.
* swapon.c (SYS_FUNC(swapon)): Do not check for non-zero the value
of the prio variable in order to print it.
* tests/swap.c (main): Update expected output.
This makes debugging of failing test a bit easier.
* tests/init.sh (match_grep): Add the cnt variable, increment it on every
pattern line read, print it as a prefix for non-matched pattern.
It is a number which consists of several xlat values, not a structure.
* futex.c (SYS_FUNC(futex)): Modify output of the val3 argument
of the FUTEX_WAKE_OP futex syscall command.
* tests/futex.c (main): Update expected output.
Co-authored-by: Elvira Khabirova <lineprinter0@gmail.com>
