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* socketutils.c (cache_and_print_inode_details): Make "details"
parameter const.
(print_sockaddr_by_inode_cached): Make "e" variable const.
(inet_send_query): Make struct nlmsghdr and struct inet_diag_req_v2
members const. Make "msg" variable const.
(inet_parse_response): Make "data" parameter and diag_msg variable const.
(receive_responses): Make "h" and "rc" variables const.
(unix_send_query): Make struct nlmsghdr and struct unix_diag_req
members const. Make "msg" variable const.
(unix_print): Make all parameters const.
(print_sockaddr_by_inode): Make proto_name parameter const.
* socketutils.c (tcp_v4_print, udp_v4_print, tcp_v6_print,
udp_v6_print): New functions.
(print_sockaddr_by_inode): Make "protocols" array static, replace
"family" and "protocol" members with "print" in its underlying
structure. Iterate through protocols array when the protocol name
is specified.
Check that -f -p attaches and follows all threads of the given pid.
* tests/attach-f-p.c: New file.
* tests/attach-f-p.test: New test.
* tests/.gitignore: Add attach-f-p.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(attach_f_p_LDADD): New variable.
(TESTS): Add attach-f-p.test.
Some files are used conditionally depending on architecture and
configuration. Create a library for the purpose of keeping such
compilation units.
* Makefile.am (strace_LDADD, noinst_LIBRARIES): Add libstrace.a.
(libstrace_a_CPPFLAGS): New variable, set to $(strace_CPPFLAGS).
(libstrace_a_CFLAGS): New variable, set to $(strace_CFLAGS).
(libstrace_a_SOURCES): New variable, set to upeek.c.
* util.c (upeek): Move ...
* upeek.c: ... here.
* tests/utime.c (main): Check decoding of NULL struct utimbuf pointer.
Check decoding of struct utimbuf located at the end of page boundary.
* tests/utime.test: Update.
* tests/sysinfo.c (main): Check decoding of NULL struct sysinfo pointer.
Check decoding of struct sysinfo located at the end of page boundary.
* tests/sysinfo.test: Update.
* tests/adjtimex.c (main): Check decoding of NULL struct timex pointer.
Check decoding of struct timex located at the end of page boundary.
* tests/adjtimex.test: Update.
* strace.c (open_dev_null): Rename to open_dummy_desc. All callers
changed. Create a pipe and return its first descriptor instead of
opening /dev/null.
Otherwise, -oLOGFILE may end up using one of them. This conflicts
with the previous change, which closes stdin/out in strace.
* strace.c (init): If fcntl(F_GETFD) fails on stdin or stdout,
sanitize them: open /dev/null and dup it until fds 0,1,2
are all used up.
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Testcase:
{ sleep 1; yes | head -n99999; } | strace -o/dev/null sh -c 'exec <&-; sleep 9'
The writer (head) will be able to perform writes to write end of the pipe.
With strace call removed, head will immediately get SIGPIPE.
This change fixes this: now writer immediately gets SIGPIPE with strace too.
* strace.c (startup_child): Close stdin/out and reopen them to /dev/null.
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Check that -o |pipe_command works. In particular, check that
strace waits for completion of piped command.
* tests/opipe.test: New test.
* tests/Makefile.am (TESTS): Add it.
* strace-graph: A clone() followed by exit() with no intervening fork
or execve resulted in the new pid having no seq key. That breaks when
trying to use seq as an array reference. Ensure that clone populates
the new pid with an empty seq entry.
* strace-graph: Set "use strict" and "use warnings" options. Fix errors
detected by strict/warnings. $result is really a string, it can be "-1"
followed by an error text.
* tests/readlink.c (PREFIX, TARGET, LINKPATH): New macros.
(main): Allocate memory for string and buffer passed to the syscall
being tested using tail_alloc mechanism. Create and cleanup test
symlink. Test syscall error path output. Print hexquoted strings
using hexquote_strndup.
* tests/readlinkat.c: Likewise.
* tests/readlink.test: Remove creation and cleanup of test symlinks.
* Makefile.am (strace_CFLAGS): New variable, set to $(AM_CFLAGS).
(libmpers_CFLAGS): New variable, set to $(strace_CFLAGS).
(libmpers_m32_a_CFLAGS, libmpers_mx32_a_CFLAGS): New variables,
set to $(libmpers_CFLAGS).
Unlike the former test that was based on match_grep,
the new one uses match_diff and does more rigorous testing.
* tests/net-y-unix.c: New file.
* tests/net-y-unix.test: New test.
* tests/net-fd.test: Remove.
* tests/net-fd.expected: Remove.
* tests/.gitignore: Add net-y-unix.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(TESTS): Replace net-fd.test with net-y-unix.test.
(net-fd.log): Remove.
(EXTRA_DIST): Remove net-fd.expected.
As -yy parser, compared to -y, needs to do at least 5 extra syscalls
(getxattr, socket, sendmsg, recvmsg, close) to print socket details,
caching results of netlink conversations between strace and kernel
noticeably reduces amount of system time spent by strace.
The caching is safe since sockets do not change their addresses after
successful bind or connect syscall.
* defs.h (string_quote, print_sockaddr_by_inode_cached): New prototypes.
* socketutils.c (cache_entry): New type.
(CACHE_SIZE, CACHE_MASK): New macros.
(cache): New static array.
(cache_and_print_inode_details): New static function.
(print_sockaddr_by_inode_cached): New function.
(inet_parse_response, unix_parse_response): Use
cache_and_print_inode_details.
* util.c (printfd): Use string_quote and print_sockaddr_by_inode_cached.
(string_quote): Remove static qualifier.
* NEWS: Mention this improvement.
* tests/unix-yy.c (main): Update.
* socketutils.c (inet_parse_response, unix_parse_response): Change
return type from bool to int, return -1 on all parse errors except
inode mismatch.
(receive_responses): Stop on the first nlmsg_type that is not
SOCK_DIAG_BY_FAMILY, also stop when the parser returns -1.
* tests/netlink_inet_diag.c (check_responses): Stop on short messages,
on first nlmsg_type that is not SOCK_DIAG_BY_FAMILY, print more verbose
diagnostics for NLMSG_ERROR.
* tests/netlink_unix_diag.c (check_responses): Likewise.
Unlike the former test that was based on match_awk,
the new one uses match_diff and does more rigorous testing.
* tests/net-yy-inet.c: New file.
* tests/net-yy-inet.test: New test.
* tests/net-yy.test: Remove.
* tests/net-yy-accept.awk: Remove.
* tests/net-yy-connect.awk: Remove.
* tests/inet-accept-connect-send-recv.c: Remove.
* tests/.gitignore: Replace inet-accept-connect-send-recv
with net-yy-inet.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(TESTS): Replace net-yy.test with net-yy-inet.test.
(EXTRA_DIST): Remove net-yy-accept.awk and net-yy-connect.awk.
Unlike the former test that was based on match_awk,
the new one uses match_diff and does more rigorous testing.
* tests/net-yy-unix.c: New file.
* tests/net-yy-unix.test: New test.
* tests/unix-yy.test: Remove.
* tests/unix-yy-accept.awk: Remove.
* tests/unix-yy-connect.awk: Remove.
* tests/.gitignore: Add net-yy-unix.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(TESTS): Replace unix-yy.test with net-yy-unix.test.
(EXTRA_DIST): Remove unix-yy-accept.awk and unix-yy-connect.awk.
* mem.c (SYS_FUNC(mincore)): Print only those bytes of the vector
that were written by the kernel.
* NEWS: Mention this fix.
* tests/mincore.c: New file.
* tests/mincore.test: New test.
* tests/Makefile.am (check_PROGRAMS): Add mincore.
(TESTS): Add mincore.test.
* tests/.gitignore: Add mincore.
* strace.c (init): Allow -p option along with a command.
(startup_child): In -D mode, record the parent of the tracer process
as strace_child.
(startup_attach): Save trace_tracer_pid before -D mode fork.
When tracing a command in -f mode, do not check for the command's
threads as it has no threads at this moment.
Never attach to the tracer process.
In -D mode, never attach to the parent of the tracer process,
terminate that process only once at the end of startup_attach,
and reset strace_child.
* strace.1: Document that -p option can be used along with tracing
of a command.
* NEWS: Mention it.
* tests/attach-p-cmd-cmd.c: New file.
* tests/attach-p-cmd-p.c: Likewise.
* tests/attach-p-cmd.test: New test.
* tests/.gitignore: Add attach-p-cmd-cmd and attach-p-cmd-p.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(TESTS): Add attach-p-cmd.test.
This fixes Debian bug #549942.
