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* tests/netlink_route.c: Include <linux/neighbour.h>.
(test_rtnl_neigh): New function.
(main): Use it.
Co-authored-by: Fabien Siron <fabien.siron@epita.fr>
* tests/netlink_route.c: Include <linux/fib_rules.h>.
(test_rtnl_rule): New function.
(main): Use it.
Co-authored-by: Fabien Siron <fabien.siron@epita.fr>
* tests/netlink_route.c: Include <linux/if_addr.h>.
(test_rtnl_addr): New function.
(main): Use it.
Co-authored-by: Fabien Siron <fabien.siron@epita.fr>
Looks like this part was untouched since the days strace supported OSes
other than Linux. Well, it's time to make it more contemporary.
* strace.1.in (.SH NOTES): Use faccessat(2) and setrlimit(2)/prlimit(2)
instead of time(2) and stat(2)/xstat(2) as examples of libc/kernel API
discrepancies.
Also, add .OM and .OR macros and use { ... | ... } syntax for indicating
possible options regarding mandatory arguments.
* strace.1 (.OM, .OR): New macro definitions, based on .OP
(.SH SYNOPSYS): Format using .SY/.OP/.OM/.OR. Put -p/command inside
{ ... | ... } block.
<sys/socket.h> has to be included before <linux/netlink.h> because
the latter used to be incomplete in older kernel headers.
As a local wrapper file called netlink.h was introduced earlier
to workaround this and related portability issues, include it before
<linux/rtnetlink.h> that in turn includes <linux/netlink.h>.
This fixes build on systems with older kernel headers.
* rtnl_link.c: Include "netlink.h" before <linux/rtnetlink.h>.
* tests/netlink_route.c: Include <linux/if_arp.h>.
(TEST_NL_ROUTE): New macro.
(test_rtnl_link): New function.
(main): Use it.
Co-authored-by: Fabien Siron <fabien.siron@epita.fr>
* netlink_route.h: New file.
* rtnl_link.c: Likewise.
* Makefile.am (strace_SOURCES): Add them.
* defs.h (arp_hardware_types, iffflags): New xlat prototypes.
* netlink_route.c: Include "netlink_route.h"
and <linux/rtnetlink.h>.
(netlink_route_decoder_t): New typedef.
(route_decoders): New array.
(decode_netlink_route): Use it.
Co-authored-by: Fabien Siron <fabien.siron@epita.fr>
The side effect of #include "xlat/nl_route_types.h" is
RTM_* constants properly defined in that header file.
While netlink.c does not use these constants itself,
netlink_route.c is going to need them soon.
* defs.h (nl_route_types): New xlat prototype.
* netlink.c: Move inclusion of "xlat/nl_route_types.h" ...
* netlink_route.c: ... here.
* tests/netlink_route.c: Include <stdint.h>,
include "test_netlink.h" instead of "netlink.h".
(test_rtnl_unspec): New function.
(main): Use it.
Co-authored-by: Fabien Siron <fabien.siron@epita.fr>
Prepare for decoding of NETLINK_KOBJECT_UEVENT. Messages of the latter,
unlike traditional netlink families, don't contain a header at all.
* netlink.c (NL_FAMILY_*): Remove enum.
(get_fd_nl_family): Replace NL_FAMILY_ERROR with -1.
(decode_nlmsg_type): Update the comment.
Skip family specific type decoders for type < NLMSG_MIN_TYPE.
(decode_nlmsghdr_with_payload): Skip family specific decoders
for type < NLMSG_MIN_TYPE && type != NLMSG_DONE.
(print_nlmsghdr): Move get_fd_nl_family invocation ...
(decode_nlmsghdr_with_payload): ... here.
Avoid proliferation of exactly the same definitions of shorthand
notations for macros defined in sysent.h by moving definitions
and undefs of these shorthand notations to separate files.
* sysent_shorthand_defs.h: New file.
* sysent_shorthand_undefs.h: Likewise.
* Makefile.am (strace_SOURCES): Add them.
* syscall.c: Use them.
Signed-off-by: Edgar Kaziakhmedov <edgar.kaziakhmedov@virtuozzo.com>
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
In order to allow usage of utility functions by other binaries
included in the strace package (like the upcoming asinfo utility),
these functions should be moved to separate files.
* error_prints.h: New file.
* xmalloc.h: Likewise.
* defs.h: Include "xmalloc.h" and "error_prints.h".
(error_msg, error_msg_and_die, error_msg_and_help, perror_msg,
perror_msg_and_die): Move to error_prints.h.
(xcalloc, xmalloc, xreallocarray, xstrdup, xstrndup): Move to xmalloc.h.
* strace.c (die): Remove static quialifier to make visible
by error_prints.c.
(error_msg, error_msg_and_die, error_msg_and_help, perror_msg,
perror_msg_and_die, verror_msg): Move ...
* error_prints.c: ... to the new file.
* xmalloc.c: Include "config.h", <stdlib.h>, <string.h>,
"error_prints.h", and "xmalloc.h" instead of "defs.h".
Use int instead of bool. Fix codestyle.
* Makefile.am (strace_SOURCES): Add error_prints.c, error_prints.h,
and xmalloc.h.
Signed-off-by: Edgar Kaziakhmedov <edgar.kaziakhmedov@virtuozzo.com>
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
This change also exports add_number_to_set, qualify_tokens,
and qualify_syscall_tokens.
* basic_filters.c: New file, part of qualify.c.
* filter_qualify.c: Likewise.
* filter.h: New file.
* qualify.c: Remove.
* Makefile.am (strace_SOURCES): Add new files, remove qualify.c.
* strace.c (maybe_allocate_tcb) <WIFSTOPPED(status) && !followfork>:
Remove the dance around possible re-injection of WSTOPSIG(status)
as the only observable stop here is the initial ptrace-stop.
* strace.c (maybe_allocate_tcb) <WIFSTOPPED(status) && !followfork>:
The expected ptrace stop signal in case of !use seize is not
syscall_trap_sig but SIGSTOP. An idea of using PTRACE_GETSIGINFO to
distinguish signal stops that should be re-injected from other kinds
of stops didn't work out due to kernel implementation peculiarities
of initial ptrace-stop.
* strace.c (flush_tcp_output): New function.
(line_ended, droptcb, print_event_exit): Use it to flush tcp->outf.
* tests/fflush.c: New file.
* tests/fflush.test: New test.
* tests/Makefile.am (MISC_TESTS): Add it.
* tests/.gitignore: Add fflush.
* tests/pure_executables.list: Likewise.
This solves potential issues when tests run first and strace is rebuilt
only after they have finished. As noted in [1], providing the current
directory explicitly should help.
[1] https://www.gnu.org/software/automake/manual/html_node/Subdirectories.html
* Makefile.am (SUBDIRS): Prepend the current directory.
When receiving a ptrace stop of an unexpected child, handle it
in the most transparent way possible:
- detach it instead of PTRACE_CONT'ing;
- send it the signal with which it has been stopped.
This should hopefully help to deal with processes that have been created
with misused CLONE_PTRACE flag set.
* strace.c (maybe_allocate_tcb) <WIFSTOPPED(status) && !followfork>:
Calculate the signal similarly to the way next_event does,
forward it to the unexpected tracee, and detach the tracee.
If the kernel contains commit 84d77d3f06e7e8dea057d10e8ec77ad71f721be3,
PTRACE_PEEKTEXT becames unavailable when the process dumpable flag is
cleared. As this is not a fatal condition for get_scno, do not bail out
if PTRACE_PEEKTEXT fails.
This condition is triggered and therefore tested by prctl-dumpable test.
* linux/sparc64/get_scno.c (arch_get_scno): Do not bail out
if PTRACE_PEEKTEXT fails.
