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Indent the C preprocessor directives to reflect their nesting
using the following script:
$ cppi -l $(git grep -El '^[[:space:]]*#[[:space:]]*(if|ifdef|ifndef|elif|else|endif|define|pragma)[[:space:]]' |grep -v '\.sh$') |while read f; do
cppi < "$f" > "$f".cppi; mv "$f".cppi "$f"
done
strace is now provided under the terms of the GNU Lesser General
Public License version 2.1 or later, see COPYING for more details.
strace test suite is now provided under the terms of the GNU General
Public License version 2 or later, see tests/COPYING for more details.
* defs.h (XLAT_STYLE_SPEC_BITS, XLAT_STYLE_MASK): New macro constants.
(tfetch_mem_fn, print_fn): New typedefs.
(enum print_array_flag_bits, enum print_array_flags): New enumerations.
(print_array_ex): Rename from print_array, add flags, index_xlat,
index_xlat_size, and index_dflt arguments.
(print_array): New static inline function, a thin wrapper around
print_array_ex.
util.c: Include "xlat.h".
(print_array): Rename to print_array_ex, add flags, index_xlat,
index_xlat_size, and index_dflt arguments. Print array indices
according to the style settings specified by flags if PAF_PRINT_INDICES
is set.
These new functions are going to be used instead of umove_or_printaddr*
as umoven_func argument of print_array.
* defs.h (tfetch_mem64, tfetch_mem64_ignore_syserror): New
function prototypes.
(tfetch_mem, tfetch_mem_ignore_syserror): New static inline
wrappers.
(tfetch_obj): New macro wrapper around tfetch_mem.
* util.c (tfetch_mem64, tfetch_mem64_ignore_syserror): New
functions.
(umoven_or_printaddr64, umoven_or_printaddr64_ignore_syserror): Use
them.
Analogous to print_int32_array_member, this helper is going to be used
in various decoders, including BPF_PROG_QUERY, PERF_EVENT_IOC_*,
and netlink meminfo.
* defs.h (print_uint32_array_member): New declaration.
* util.c (print_uint32_array_member): New function.
Analogous to print_uint64_array_member, this helper is going to be used
for IFLA_AF_SPEC decoding.
* defs.h (print_int32_array_member): New declaration.
* util.c (print_int32_array_member): New function.
As those are pretty unusual, let's add some additional information
that can be reported by users.
* util.c (print_quoted_string_ex, dumpstr): Add reasons for memory
allocation errors.
(sizeof_iov): Change type from size_t to unsigned int.
(dumpiov_upto): Rewrite size initialisation similarly to the way it's
done in print_quoted_string_ex, add reasons for memory allocation errors.
Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>
Since these are emitted in multiple places and are not expected during
any normal operation, it makes sense to report the caller name.
* util.c (print_quoted_string_ex, print_quoted_string_ex, dumpiov_upto,
dumpstr): Replace error_msg with error_func_msg.
And rename it to print_uint64_array_member to make the name sensible
without additional context.
* defs.h (print_uint64_array_member): New function prototype.
* btrfs.c (print_uint64): Move...
* util.c (print_uint64_array_member): ...here, drop "static" qualifier.
Counterparts for umoven_or_printaddr/umoven_or_printaddr_ignore_syserror
that always print 64 bits of addr (as this is needed in bpf and btrfs
decoders).
* util.c (umoven_or_printaddr64): Rename from umoven_or_printaddr,
change addr argument type to uint64_t, call printaddr64 instead of
printaddr.
(umoven_or_printaddr64_ignore_syserror): Rename from
umoven_or_printaddr_ignore_syserror, change addr argument type to
uint64_t, call printaddr64 instead of printaddr.
* defs.h (umoven_or_printaddr64): Rename from umoven_or_printaddr,
change addr argument type to uint64_t.
(umoven_or_printaddr64_ignore_syserror): Rename from
umoven_or_printaddr_ignore_syserror, change addr argument type to
uint64_t.
(umove_or_printaddr64): New macro, a wrapper for umoven_or_printaddr64.
(umoven_or_printaddr): New function, a wrapper for
umoven_or_printaddr64.
(umoven_or_printaddr_ignore_syserror): New function, a wrapper for
umoven_or_printaddr64_ignore_syserror.
This is required to implement more precise time measurements.
* Makefile.am (strace_LDADD): Add $(clock_LIBS).
* defs.h (struct tcb): Change the type of stime, dtime, and etime fields
from struct timeval to struct timespec, all users updated.
(syscall_exiting_decode, syscall_exiting_trace, count_syscall): Change
the type of "struct timeval *" argument to "struct timespec *", all
users updated.
(tv_nz, tv_cmp, tv_float, tv_add, tv_sub, tv_div, tv_mul): Rename to
ts_nz, ts_cmp, ts_float, ts_add, ts_sub, ts_div, and ts_mul. Change
the type of all "struct timeval *" arguments to "struct timespec *",
all users updated.
* util.c (tv_nz, tv_cmp, tv_float, tv_add, tv_sub, tv_div, tv_mul):
Rename to ts_nz, ts_cmp, ts_float, ts_add, ts_sub, ts_div, and ts_mul.
Change the type of all "struct timeval *" arguments to "struct timespec *".
* count.c (struct call_counts): Change the type of "time" field
from struct timeval to struct timespec, all users updated.
(overhead): Change type from struct timeval to struct timespec, all
users updated.
(count_syscall): Change the type of "struct timeval *" argument to
"struct timespec *".
* strace.c (printleader): Change the type of struct timeval variables
to struct timespec, call clock_gettime instead of gettimeofday.
(next_event, trace_syscall): Change the type of struct timeval variables
to struct timespec.
* syscall.c (syscall_entering_finish, syscall_exiting_decode): Call
clock_gettime instead of gettimeofday.
Sometimes, 64-bit value is expected to be interpreted as an address
(in BTRFS ioctl interface, for example).
* defs.h (printaddr64): New declaration.
* util.c (printaddr64): Rename from printaddr, change argument type
to uint64_t.
(printaddr): Turn into a thin wrapper around printaddr64.
(printnum_addr_int, printnum_addr_int64): Use printaddr64 instead of
printaddr. printnum_addr_int64 is not used outside the cases where
kernel_long is less or equal than 64 bit currently, so this change
should be safe.
* util.c: Include <sys/stat.h>, <sys/sysmacros.h>,
and "largefile_wrappers.h".
(printsocket, printdev): New functions.
(printfd): Move socket matching/printing logic to printsocket. Check
also for printdev. Escape opening angle bracket in addition to closing angle
bracket as it can show up as a separator in printdev.
* tests/fsync-y.c: Update expected output.
* strace.1.in: Mention this.
* NEWS: Likewise.
Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>
Quotes are not always used to denote string limits; printfd uses angle
brackets for that, for example. As result, mechanism for supplying
set of additional characters in order to avoid ambiguities regarding
the end of the quoted string is needed.
* defs.h (string_quote): Add escape_chars parameter.
(print_quoted_string_ex): New function prototype.
* util.c (string_quote): Add escape_chars parameter.
(print_quoted_string_ex): Rename from print_quoted_string, add
escape_chars parameter, pass it to string_quote call.
(print_quoted_string): Turn into a thin wrapper around
print_quoted_string_ex.
(printstr_ex): Pass NULL as escape_chars argument of string_quote call.
* socketutils.c (unix_parse_response): Pass NULL as escape_chars
argument of string_quote call.
* tests/print_quoted_string.c (print_octal): New function.
print_quoted_memory_ex): Use it. Add escape_chars parameter.
(print_quoted_memory): Pass NULL as escape_chars argument
of print_quoted_memory_ex call.
* tests/tests.h (print_quoted_string_ex, print_quoted_memory_ex): Add
escape_chars parameter.
* tests/fsync-y.c: Pass NULL as escape_chars argument of
print_quoted_string_ex call.
Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>
* util.c (string_quote): Change the upper limit for the next character
in unabbreviated octal printing from '9' to '7'.
* tests/print_quoted_string.c (print_quoted_memory): Likewise.
Because there are never enough print_quoted_string flags.
* defs.h (QUOTE_EMIT_COMMENT): New quoting flag macro constant.
* util.c (string_quote): Emit " /* " in the beginning and " */" in the
end if QUOTE_EMIT_COMMENT is passed.
(print_quoted_string): Increase alloc_size by 7 if QUOTE_EMIT_COMMENT is
passed.
As umovestr now returns something useful, let's propagate it further.
* defs.h (printstr_ex, printpathn, printpath): Change return type from
void to int.
(printstrn, printstr): Change return type from void to int, return
printstr_ex result.
* util.c (printpathn): Return -1 on NULL addr, nul_seen (exit code of
umovestr) on success.
(printpath): Return printpathn result.
(printstr_ex): Return -1 on NULL addr, umoven/umovestr result otherwise.
In preparation to passing tcp to all tracee-related syscalls.
* defs.h (read_int_from_file): Add "struct tcb *" as the first argument.
* util.c (read_int_from_file): Likewise.
* msghdr.c (get_optmem_max): Add "struct tcb *tcp" as the first
argument, pass it to read_int_from_file call.
(decode_msg_control): Pass tcp to get_optmem_max.
Make string_to_uint* functions available to other binaries
included in the strace package.
* string_to_uint.h: New file.
* defs.h: Include it.
(string_to_uint_ex, string_to_uint_upto, string_to_uint): Move
to string_to_uint.h.
* util.c (string_to_uint_ex, string_to_uint): Move ...
* string_to_uint.c: ... to the new file.
* Makefile.am (strace_SOURCES): Add string_to_uint.h and string_to_uint.c.
Signed-off-by: Edgar Kaziakhmedov <edgar.kaziakhmedov@virtuozzo.com>
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
The kernel does not copy more than PATH_MAX bytes from userspace
pathnames, treating non-NUL-terminated pathnames as ENAMETOOLONG.
* util.c (printpathn): Decrease buffer size to PATH_MAX.
(printpath): Specify PATH_MAX - 1 as the maximum pathname length
to match the kernel behaviour. The underlying umovestr call will fetch
up to PATH_MAX bytes from tracee's memory, but no more than first
PATH_MAX - 1 bytes will be printed.
These functions are more kernel-specific compared to all other functions
defined in util.c.
* ucopy.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* util.c (umoven, umovestr): Move to ucopy.c.
In many places where kernel expects a NUL-terminated string of length
up to a known fixed limit, e.g. when a NUL-terminated string is
a fixed-size field of a structure, strace does not print the last byte
assuming it is NUL, which is not always the case.
Change output format for such strings to distinguish NUL-terminated
strings from non-NUL-terminated ones: append ellipsis to the output
when the string is not NUL-terminated.
* defs.h (print_quoted_cstring): New prototype.
* util.c (print_quoted_cstring): New function.
(printpathn): Use it instead of print_quoted_string with
QUOTE_0_TERMINATED argument.
* print_fields.h (PRINT_FIELD_CSTRING): Likewise.
* btrfs.c (btrfs_ioctl): Likewise.
* dirent.c (SYS_FUNC(getdents)): Likewise.
* dirent64.c (SYS_FUNC(getdents64)): Likewise.
* print_ifindex.c (print_ifindex): Likewise.
* sysmips.c (SYS_FUNC(sysmips)): Likewise.
* ubi.c (ubi_ioctl): Likewise.
* tests/tests.h (print_quoted_cstring): New prototype.
* tests/print_quoted_string.c (print_quoted_cstring): New function.
* tests/ioctl_block.c (main): Update expected output.
* tests/ioctl_dm.c (main): Likewise.
* tests/ioctl_loop.c (print_loop_info, print_loop_info64): Likewise.
* tests/netlink_crypto.c (test_crypto_msg_newalg): Likewise.
* util.c (printstr_ex): Move the check that -s argument
does not exceed -1U / 4 ...
* strace.c (init): ... here.
* tests/options-syntax.test: Check it.
Add printflags_ex extension over printflags64 that, similar
to printxvals, takes a NULL-terminated sequence of xlat pointers.
* defs.h (printflags_ex): New prototype.
(printflags64): Turn into a thin wrapper around printflags_ex.
* netlink.c (decode_nlmsg_flags): Use printflags_ex.
* util.c (printflags_ex): New function.
(printflags64): Remove.
* xlat/netlink_get_flags.in: Remove entries listed
in xlat/netlink_flags.in file.
* xlat/netlink_new_flags.in: Likewise.
Change print_sockaddr_by_inode to be the only function exposed,
hide print_sockaddr_by_inode_cached as a part of implementation.
* defs.h (print_sockaddr_by_inode_cached): Remove prototype.
(print_sockaddr_by_inode): Add struct tcb * and descriptor arguments.
* socketutils.c (print_sockaddr_by_inode_cached): Make static.
(print_sockaddr_by_inode): Rename to print_sockaddr_by_inode_uncached,
make static.
(print_sockaddr_by_inode): New function.
* util.c (printfd): Update to use new print_sockaddr_by_inode.
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>
Due to a subtle gcc bug that leads to miscompiled aarch64 kernels,
the 3rd argument of sched_getattr syscall is not quite 32-bit
on aarch64 as on other architectures. For more details see
https://sourceforge.net/p/strace/mailman/message/35721703/
* defs.h (print_abnormal_hi): New prototype.
* util.c (print_abnormal_hi): New function.
* sched.c (SYS_FUNC(sched_getattr)) [AARCH64]: Use it.
* tests/sched_xetattr.c (main) [__arm64__ || __aarch64__]: Test it.
This could be useful in cases when some binary data should not be
interpreted as an ASCII string, but rather as an array of byte values.
* defs.h (QUOTE_FORCE_HEX): New macro constant.
* util.c (quote_string): Enable use_hex when QUOTE_FORCE_HEX is set
in user_style parameter.
* strace.c: Remove __NR_tkill checks, assume it is always defined.
* util.c: Remove __NR_process_vm_readv checks and fallback definitions,
assume it is always defined.
