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strace/tests/attach-p-cmd-cmd.c

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Implement simultaneous use of -p option and tracing of a command * 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.
2016-01-22 14:37:14 +00:00
/*
* This file is part of attach-p-cmd strace test.
*
tests: robustify attach-p-cmd.test against buggy kernels From time to time various kernels, old and new, just go nuts and fail attach-p-cmd.test with the following diagnostics: 12345 --- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} --- -12345 chdir("attach-p-cmd.test -p") = -1 ENOENT (No such file or directory) +12345 syscall_4294967295(0xffe60934, 0x1c0, 0xffe60934, 0x1, 0xffe609b4, 0xffe60a58) = -1 (errno 38) +12345 chdir("attach-p-cmd.test -p") = -1 ENOSYS (Function not implemented) Let's workaround this kernel madness by rewriting the test without use of SIGALRM. * tests/attach-p-cmd.h: New file. * tests/Makefile.am (EXTRA_DIST): Add attach-p-cmd.h. * tests/attach-p-cmd-cmd.c: Include "attach-p-cmd.h". (write_pidfile, wait_for_peer_invocation): New functions. (main): Use them. * tests/attach-p-cmd-p.c: Include <time.h> and "attach-p-cmd.h". (wait_for_peer_invocation, wait_for_peer_termination): New functions. (main): Use them. Do not raise SIGALRM, use nanosleep after peer termination.
2017-12-03 00:25:43 +00:00
* Copyright (c) 2016-2017 Dmitry V. Levin <ldv@altlinux.org>
Implement simultaneous use of -p option and tracing of a command * 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.
2016-01-22 14:37:14 +00:00
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "tests.h"
tests: robustify attach-p-cmd.test against race conditions 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.
2016-12-06 00:32:06 +00:00
#include <errno.h>
Implement simultaneous use of -p option and tracing of a command * 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.
2016-01-22 14:37:14 +00:00
#include <stdio.h>
tests: robustify attach-p-cmd.test against race conditions 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.
2016-12-06 00:32:06 +00:00
#include <sys/stat.h>
Implement simultaneous use of -p option and tracing of a command * 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.
2016-01-22 14:37:14 +00:00
#include <unistd.h>
tests: robustify attach-p-cmd.test against buggy kernels From time to time various kernels, old and new, just go nuts and fail attach-p-cmd.test with the following diagnostics: 12345 --- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} --- -12345 chdir("attach-p-cmd.test -p") = -1 ENOENT (No such file or directory) +12345 syscall_4294967295(0xffe60934, 0x1c0, 0xffe60934, 0x1, 0xffe609b4, 0xffe60a58) = -1 (errno 38) +12345 chdir("attach-p-cmd.test -p") = -1 ENOSYS (Function not implemented) Let's workaround this kernel madness by rewriting the test without use of SIGALRM. * tests/attach-p-cmd.h: New file. * tests/Makefile.am (EXTRA_DIST): Add attach-p-cmd.h. * tests/attach-p-cmd-cmd.c: Include "attach-p-cmd.h". (write_pidfile, wait_for_peer_invocation): New functions. (main): Use them. * tests/attach-p-cmd-p.c: Include <time.h> and "attach-p-cmd.h". (wait_for_peer_invocation, wait_for_peer_termination): New functions. (main): Use them. Do not raise SIGALRM, use nanosleep after peer termination.
2017-12-03 00:25:43 +00:00
#include "attach-p-cmd.h"
Implement simultaneous use of -p option and tracing of a command * 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.
2016-01-22 14:37:14 +00:00
tests: robustify attach-p-cmd.test against buggy kernels From time to time various kernels, old and new, just go nuts and fail attach-p-cmd.test with the following diagnostics: 12345 --- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} --- -12345 chdir("attach-p-cmd.test -p") = -1 ENOENT (No such file or directory) +12345 syscall_4294967295(0xffe60934, 0x1c0, 0xffe60934, 0x1, 0xffe609b4, 0xffe60a58) = -1 (errno 38) +12345 chdir("attach-p-cmd.test -p") = -1 ENOSYS (Function not implemented) Let's workaround this kernel madness by rewriting the test without use of SIGALRM. * tests/attach-p-cmd.h: New file. * tests/Makefile.am (EXTRA_DIST): Add attach-p-cmd.h. * tests/attach-p-cmd-cmd.c: Include "attach-p-cmd.h". (write_pidfile, wait_for_peer_invocation): New functions. (main): Use them. * tests/attach-p-cmd-p.c: Include <time.h> and "attach-p-cmd.h". (wait_for_peer_invocation, wait_for_peer_termination): New functions. (main): Use them. Do not raise SIGALRM, use nanosleep after peer termination.
2017-12-03 00:25:43 +00:00
static void
write_pidfile(const pid_t pid)
{
FILE *fp = fopen(pidfile, "w");
if (!fp)
perror_msg_and_fail("fopen: %s", pidfile);
if (fprintf(fp, "%d", pid) < 0)
perror_msg_and_fail("fprintf: %s", pidfile);
if (fclose(fp))
perror_msg_and_fail("fclose: %s", pidfile);
}
static void
wait_for_peer_invocation(void)
Implement simultaneous use of -p option and tracing of a command * 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.
2016-01-22 14:37:14 +00:00
{
tests: robustify attach-p-cmd.test against race conditions 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.
2016-12-06 00:32:06 +00:00
/* wait for the lock directory to be created by peer */
while (rmdir(lockdir)) {
if (ENOENT != errno)
perror_msg_and_fail("rmdir: %s", lockdir);
}
tests: robustify attach-p-cmd.test against buggy kernels From time to time various kernels, old and new, just go nuts and fail attach-p-cmd.test with the following diagnostics: 12345 --- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} --- -12345 chdir("attach-p-cmd.test -p") = -1 ENOENT (No such file or directory) +12345 syscall_4294967295(0xffe60934, 0x1c0, 0xffe60934, 0x1, 0xffe609b4, 0xffe60a58) = -1 (errno 38) +12345 chdir("attach-p-cmd.test -p") = -1 ENOSYS (Function not implemented) Let's workaround this kernel madness by rewriting the test without use of SIGALRM. * tests/attach-p-cmd.h: New file. * tests/Makefile.am (EXTRA_DIST): Add attach-p-cmd.h. * tests/attach-p-cmd-cmd.c: Include "attach-p-cmd.h". (write_pidfile, wait_for_peer_invocation): New functions. (main): Use them. * tests/attach-p-cmd-p.c: Include <time.h> and "attach-p-cmd.h". (wait_for_peer_invocation, wait_for_peer_termination): New functions. (main): Use them. Do not raise SIGALRM, use nanosleep after peer termination.
2017-12-03 00:25:43 +00:00
}
int
main(void)
{
const pid_t pid = getpid();
write_pidfile(pid);
wait_for_peer_invocation();
tests: robustify attach-p-cmd.test against race conditions 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.
2016-12-06 00:32:06 +00:00
tests: cleanup attach-p-cmd.test * tests/attach-p-cmd-cmd.c (main): Cleanup expected output. * tests/attach-p-cmd-p.c (main): Print expected output. * tests/attach-p-cmd.test: Do not print expected output.
2016-08-02 16:43:37 +00:00
static const char dir[] = "attach-p-cmd.test cmd";
int rc = chdir(dir);
tests: robustify attach-p-cmd.test against race conditions 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.
2016-12-06 00:32:06 +00:00
printf("%-5d chdir(\"%s\") = %s\n"
tests: cleanup attach-p-cmd.test * tests/attach-p-cmd-cmd.c (main): Cleanup expected output. * tests/attach-p-cmd-p.c (main): Print expected output. * tests/attach-p-cmd.test: Do not print expected output.
2016-08-02 16:43:37 +00:00
"%-5d +++ exited with 0 +++\n",
tests: robustify attach-p-cmd.test against race conditions 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.
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pid, dir, sprintrc(rc), pid);
tests: cleanup attach-p-cmd.test * tests/attach-p-cmd-cmd.c (main): Cleanup expected output. * tests/attach-p-cmd-p.c (main): Print expected output. * tests/attach-p-cmd.test: Do not print expected output.
2016-08-02 16:43:37 +00:00
Implement simultaneous use of -p option and tracing of a command * 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.
2016-01-22 14:37:14 +00:00
return 0;
}
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