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Before, it relied on implicit assumptions that syscall-exit event is
right the next one after syscall-enter. Also, there's some additional
debugging output that may be might help someone someday.
* count.c (count_syscall): Calculate system time as difference of tcp's
stime and ltime.
* defs.h (struct tcb): Add ltime, atime fields, remove dtime.
* strace.c (droptcb): Print total system time spent by a tcb.
(startup_tcb): Store initial system time in atime.
(next_event): Update stime directly.
* syscall.c (syscall_entering_finish): Store current system time in
tcb's ltime field.
(syscall_exiting_finish): Likewise.
* count.c (set_overhead): Change argument type to const char *, call
parse_ts to parse it and set to overhead.
* defs.h (set_overhead): Update declaration.
* strace.c: (init) <case 'O'>: do not parse argument, pass optarg to
set_overhead call.
* tests/count.test (GENERIC, WALLCLOCK, HALFCLOCK): New variables with
expected patterns.
Add checks for the new -O syntax.
* defs.h (sprintflags_ex): Add "sep" argument.
(sprintflags): Pass '\0' in "sep" argument.
* open.c (sprint_open_modes): Use sprintflags_ex for printing
open_mode_flags.
* xlat.c (sprintflags_ex): Add "sep" argument, use it as initial
separator (if not nul).
* defs.h [!MAX_ADDR_LEN] (MAX_ADDR_LEN): New macro.
(sprint_hwaddr): New declaration.
(print_hwaddr): New inline function, a wrapper for sprint_hwaddr.
* print_fields.h (PRINT_FIELD_HWADDR_SZ): New macro.
* print_mac.c: Include "xlat/arp_hardware_types.h" under
XLAT_MACROS_ONLY.
[!MAX_ADDR_LEN] (MAX_ADDR_LEN): Remove.
(sprint_hwaddr): New function.
* sock.c (print_ifreq) <SIOCSIFHWADDR, SIOCGIFHWADDR>: Print hardware
address using PRINT_FIELD_HWADDR_SZ.
get_fd_nl_family did a weird thing: it parsed netlink socket address in
order to get netlink proto, but the address itself is constructed based
on the netlink proto number in the first place. Avoid doing so by
stashing information about netlink protocol right after nul byte of the
sockaddress and providing it on request.
* socketutils.c (cache_entry): Add has_data field.
(cache_inode_details): Add data argument, store it in has_data field.
(get_sockdata_by_inode_cached): New function.
(inet_parse_response, unix_parse_response, packet_parse_response):
Pass false in data argument of cache_inode_details call.
(netlink_parse_response): Append ndiag_protocol value to details string,
pass true to cache_inode_details call.
(unix_get, inet_get, packet_get): Add data argument, return NULL
if called with data == true.
(netlink_get): Add data argument, call get_sockdata_by_inode_cached
instead of get_sockaddr_by_inode_cached if called with data == true.
(protocols): Add data arguments to the type definition of the get field.
(get_sockaddr_by_inode_uncached): Add data argument, pass
it to protocols->get.
(print_sockaddr_by_inode_uncached): Call get_sockaddr_by_inode_uncached
with data == false.
(get_sockaddr_by_inode): Call get_sockaddr_by_inode_uncached with
data == false;
(get_sockdata_by_inode): New function.
* defs.h (get_sockdata_by_inode): New declaration.
* netlink.c (get_fd_nl_family): Use get_sockdata_by_inode.
* xlat/aio_iocb_flags.in: New file.
* defs.h (pollflags, rwf_flags): New declarations.
* configure.ac: Check for the presence of aio_rw_flags field of the
struct iocb.
* aio.c: Include "xlat/aio_iocb_flags.h".
(AIO_RW_FLAGS_FIELD): New macro definition, defined based on the
presence of HAVE_STRUCT_IOCB_AIO_RW_FLAGS macro.
(iocb_sub): Add SUB_POLL.
(tprint_lio_opcode): Change IOCB_CMD_POLL subtype to SUB_POLL.
[!IOCB_FLAG_RESFD] (print_common_flags): Remove IOCB_FLAG_RESFD presence
check, as it is now provided via xlat.
(print_common_flags): Print aio_flags using aio_iocb_flags xlat.
(print_iocb_header): Always print aio_data. Print aio_rw_flags if it is
non-zero. Print aio_reqprio based on the presence of IOCB_FLAG_IOPRIO
flag in aio_flags (us print_ioprio if it set and print as a signed
integer otherwise).
(print_iocb): Decode SUB_POLL subtype.
* tests/aio.c: Update expected output.
In order to be able to obtain sanitised device name internally.
* defs.h (geT_ifname): New declaration.
* print_ifindex.c (get_ifname): Refactor, leaving out addition of
if_nametoindex("") part.
(sprint_ifname): New function, adds if_nametoindex("") to
get_ifname's output.
(print_ifindex): Use sprint_ifname instead of get_ifname.
Add a helper function that provides address family based on the internal
notion of the socket protocol (using protocols table).
* defs.h (get_family_by_proto): New declaration.
* socketutils.c (get_family_by_proto): New function.
* defs.h (print_rose_addr): New declaration.
* print_fields.h (PRINT_FIELD_ROSE_ADDR): New macro.
* sockaddr.c (print_rose_addr, print_sockaddr_data_rose): New function.
(sa_printers) <[AF_ROSE]>: New printer.
* sockaddr.c: Include <linux/x25.h>.
(print_sockaddr_data_x25): New function.
(sa_printers) <[AF_X25]>: New socket address handler.
* tests/net-sockaddr.c (check_x25): New function.
(main): Call check_x25 in order to check X.25 socket address decoding.
* sockaddr.c: Include <linux/ax25.h>
(check_ax25_address, ax25_addr2str, print_ax25_addr_raw,
print_ax25_addr, print_sockaddr_data_ax25): New function.
(sa_printers) <[AF_AX25]>: New printer.
* tests/net-sockaddr.c (AX25_ADDR): New macro.
(check_ax25): New function.
(main): Call check_ax25 in order to check AX.25 socket address decoding.
For the cases when it is preferable to print something like
"BASE_VAL+increment".
* defs.h (xlat_search_eq_or_less): New declaration.
* xlat.c (xlat_search_eq_or_less): New function.
In order to avoid dealing with xlat verbosity styles outside xlat code
as much as possible.
* defs.h (xlat_style_private_flag_bits): Rename from
print_array_flag_bits, add PXF_DEFAULT_STR_BIT.
(xlat_style_private_flags): Rename from print_array_flags, add
FLAG_(PXF_DEFAULT_STR).
* xlat.c (print_xlat_ex): Handle PXF_DEFAULT_STR by interpreting str
as a default value (print both value and str in XLAT_STYLE_ABBREV).
There is a comment in drivers/input/evdev.c which says:
/* EV_SYN==0 is EV_CNT, _not_ SYN_CNT, see EVIOCGBIT */
That is, EVIOCGBIT(0, ...) should return a bit mask with supported
event types instead of SYN_* event codes.
* defs.h (evdev_ev): New prototype.
* evdev.c: Include "xlat/evdev_ev.h" and remove "xlat/evdev_sync.h".
(bit_ioctl) <case EV_SYN>: Replace EV_SYN with 0, use evdev_ev
with XT_SORTED in decode_bitset invocation instead.
* ioctl.c: Do not include "xlat/evdev_ev.h".
(evdev_decode_number): Print nr == 0x20 as "0" instead of "EV_SYN".
* tests/ioctl_evdev.c (main): Use 0 instead of EV_SYN in EVIOCGBIT
output.
* xlat/evdev_sync.in: Remove.
Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>
Fixes: v4.10~89 "Add decoding for evdev ioctls"
In KVM, a virtual machine implementation like Qemu can access a vcpu
via ioctl. KVM_RUN is an ioctl command to enter vcpu. The command
returns control for various reasons: needs of device emulation or
consuming time slices are the typical ones. The vmi takes a different
action for the reason.
We, strace users, want to know the reason to understand kvm. This
change prints the reason as auxstr if "-e kvm=vcpu" option is given,
and if strace runs on Linux 4.16.0 or higher, which includes commit
e46b469278a59781f9b25ff608af84892963821b, "kvm: embed vcpu id to dentry
of vcpu anon inode."
The way to get the reason is a bit complicated because the ioctl does
not return it to the userspace directly. Instead, the vmi and kvm
communicate via an area of the process virtual memory where the fd of
vcpu is mmap'ed. strace must peek the area to know the reason.
The change does three things: (1) recording the area for the given vcpu
when the target calls VCPU_CREATE to vcpu_info_list per tcb data field,
(2) verifying the data recorded in vcpu_info_list before doing (3), and
(3) decoding the exit reason field of the area.
The change is complicated because there is a case that strace
does not have a chance to do (1) if -p option is used.
In this case, vcpu_info data created in the step (2).
The area has more fields than "exit reason",
dumping them may be implemented in the future.
* defs.h (struct tcb) [HAVE_LINUX_KVM_H]: Add vcpu_info_list field.
[HAVE_LINUX_KVM_H]: (kvm_run_structure_decoder_init,
kvm_vcpu_info_free): New declarations.
* strace.c (usage): Add "kvm" as a new expression for -e option.
(droptcb): Call kvm_vcpu_info_free.
* filter_qualify.c (qualify_kvm): New function calling
kvm_run_structure_decoder_init to enable for attaching the exit
reason to auxstr.
(qual_options): Add "kvm" as an entry.
* xlat/kvm_exit_reason.in: New file.
* kvm.c: Include xmalloc.h and mmap_cache.h.
(dump_kvm_run_structure): New static variable.
(kvm_run_structure_decoder_init): New function.
(vcpu_info): New struct definition representing the 3-tuple: vcpu file
descriptor, id of the vcpu, and mmap'ed entry.
(vcpu_find, vcpu_alloc, vcpu_register, vcpu_getinfo,
kvm_vcpu_info_free): New functions to access tcb's vcpu_info_list
field and vcpu_info data type.
(is_map_for_file, map_len): New helper functions.
(kvm_ioclt_run_attach_auxstr, kvm_ioctl_decode_run): New functions
decoding vcpu exit reason and attaching the decoded data to auxstr
field of tcb.
(kvm_ioctl_create_vcpu): Call vcpu_register to make an entry mapping
a file descriptor and the vcpu id associated with the fd.
(kvm_ioctl): Call kvm_ioctl_decode_run.
Signed-off-by: Masatake YAMATO <yamato@redhat.com>
Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>
* syscall.c (personality_designators): New array.
* defs.h (personality_designators): New declaration.
* basic_filters.c (qualify_syscall_separate_personality,
qualify_syscall_number_personality): New functions.
(qualify_syscall_number): Use qualify_syscall_separate_personality for
checking for a personality specification, call
qualify_syscall_number_personality for setting number set for specific
personality.
(qualify_syscall_name_personality): New function.
(qualify_syscall_name): Use qualify_syscall_separate_personality for
checking for a personality specification, call
qualify_syscall_name_personality for setting number set for specific
personality.
* strace.1.in (.SS Filtering): Document it.
* NEWS: Mention it.
Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>
Closes: https://github.com/strace/strace/issues/35
* defs.h (INJECT_F_SYSCALL, INJECT_ACTION_FLAGS, TCB_TAMPERED_NO_FAIL,
syscall_tampered_nofail): New macros.
(inject_data): Add scno field.
* filter_qualify.c (struct inject_personality_data): New type.
(parse_inject_token): Add "pdata" argument, parse "syscall=" option.
(parse_inject_expression): Add "pdata" argument, forward it to
parse_inject_token.
(qualify_inject_common) <pdata>: New variable array, pass it to
parse_inject_expression, copy it into inject_vec.
* syscall.c (tamper_with_syscall_entering): Inject the specified syscall
if INJECT_F_SYSCALL is set.
(tamper_with_syscall_exiting): Update the check for a failed syscall
injection.
(get_syscall_result): Update get_error invocation.
* strace.1.in: Document new syscall injection expression.
* NEWS: Mention it.
Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>
Closes: https://github.com/strace/strace/issues/26
* 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.
* defs.h (printxval_dispatch_ex): Rename from printxval_dispatch, add
style argument.
(printxval_dispatch): New static inline function, a thin wrapper around
printxval_dispatch_ex.
* xlat.c (printxval_dispatch): Rename to printxval_dispatch_ex, add
style argument, handle it.
Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>
* print_mac.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* defs.h (sprint_mac_addr): New declaration.
(print_mac_addr): New function, a thin wrapper around sprint_mac_addr.
* print_fields.h (PRINT_FIELD_MAC, PRINT_FIELD_MAC_SZ): New macros.
* rtnl_link.c (decode_ifla_bridge_id): Use PRINT_FIELD_MAC for bridge
address printing.
* sock.c (print_ifreq) <case SIOCGIFHWADDR>: Use print_mac_addr for
ifr_hwaddr printing.
* sockaddr.c (print_sockaddr_data_bt): Use print_mac_addr for
{sco,rc,l2}_bdaddr field printing.
Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>
Starting with commit v4.22~109, sorted xlat tables are terminated
with XLAT_END.
* defs.h (ethernet_protocols): Remove the "unterminated" part from
description.
Do not call mmap_cache functions until mmap_cache_enable is invoked.
Change struct mmap_cache_t into a proxy structure, move all mmap_cache
data from struct tcb inside this new structure.
* Makefile.am (strace_SOURCES): Move mmap_cache.c and mmap_cache.h
to libstrace_a_SOURCES.
* defs.h (struct tcb): Remove mmap_cache_size and mmap_cache_generation
* fields.
* mmap_cache.h (struct mmap_cache_t): Rename
to struct mmap_cache_entry_t, create a new struct mmap_cache_t,
all users updated.
(mmap_cache_delete): Remove.
* mmap_cache.c (mmap_cache_delete): Rename to delete_mmap_cache,
add static qualifier.
(build_mmap_cache): Merge into mmap_cache_rebuild_if_invalid.
* strace.c (droptcb): Replace mmap_cache_delete invocation
with tcp->mmap_cache->free_fn.
Also introduce evdev_abs_size constant, which will be needed later.
* defs.h (evdev_abs_size): New declaration.
* ioctl.c: Move xlat/evdev_abs.h inclusion ...
* evdev.c: ... here.
(evdev_abs_size): New constant variable.
