tests: check that -f -p attaches to threads properly
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.
diff --git a/tests/.gitignore b/tests/.gitignore
index 690242e..c5dd3cb 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -8,6 +8,7 @@
_newselect
adjtimex
aio
+attach-f-p
attach-p-cmd-cmd
attach-p-cmd-p
bpf
diff --git a/tests/Makefile.am b/tests/Makefile.am
index a28a46a..7efbf77 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -58,6 +58,7 @@
_newselect \
adjtimex \
aio \
+ attach-f-p \
attach-p-cmd-cmd \
attach-p-cmd-p \
bpf \
@@ -172,6 +173,7 @@
xettimeofday \
# end of check_PROGRAMS
+attach_f_p_LDADD = -lrt -lpthread $(LDADD)
clock_xettime_LDADD = -lrt $(LDADD)
filter_unavailable_LDADD = -lpthread $(LDADD)
fstat64_CPPFLAGS = $(AM_CPPFLAGS) -D_FILE_OFFSET_BITS=64
@@ -311,6 +313,7 @@
xettimeofday.test \
\
count.test \
+ attach-f-p.test \
attach-p-cmd.test \
detach-sleeping.test \
detach-stopped.test \
diff --git a/tests/attach-f-p.c b/tests/attach-f-p.c
new file mode 100644
index 0000000..51a5333
--- /dev/null
+++ b/tests/attach-f-p.c
@@ -0,0 +1,137 @@
+/*
+ * This file is part of attach-f-p strace test.
+ *
+ * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
+ * 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"
+#include <assert.h>
+#include <errno.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+
+#define N 3
+
+typedef union {
+ void *ptr;
+ pid_t pid;
+} retval_t;
+
+typedef struct {
+ sigset_t set;
+ unsigned int no;
+} thread_arg_t;
+
+static const char text_parent[] = "attach-f-p.test parent";
+static const char *child[N] = {
+ "attach-f-p.test child 0",
+ "attach-f-p.test child 1",
+ "attach-f-p.test child 2"
+};
+static const int sigs[N] = { SIGALRM, SIGUSR1, SIGUSR2 };
+static const struct itimerspec its[N] = {
+ { .it_value.tv_nsec = 500000000 },
+ { .it_value.tv_nsec = 700000000 },
+ { .it_value.tv_nsec = 900000000 },
+};
+static thread_arg_t args[N] = {
+ { .no = 0 },
+ { .no = 1 },
+ { .no = 2 }
+};
+
+static void *
+thread(void *a)
+{
+ thread_arg_t *arg = a;
+ int signo;
+ errno = sigwait(&arg->set, &signo);
+ if (errno)
+ perror_msg_and_fail("sigwait");
+ assert(chdir(child[arg->no]) == -1);
+ retval_t retval = { .pid = syscall(__NR_gettid) };
+ return retval.ptr;
+}
+
+int
+main(void)
+{
+ pthread_t t[N];
+ unsigned int i;
+
+ for (i = 0; i < N; ++i) {
+ sigemptyset(&args[i].set);
+ sigaddset(&args[i].set, sigs[i]);
+
+ errno = pthread_sigmask(SIG_BLOCK, &args[i].set, NULL);
+ if (errno)
+ perror_msg_and_fail("pthread_sigmask");
+ }
+
+ for (i = 0; i < N; ++i) {
+ struct sigevent sev = {
+ .sigev_notify = SIGEV_SIGNAL,
+ .sigev_signo = sigs[i]
+ };
+ timer_t timerid;
+ if (timer_create(CLOCK_MONOTONIC, &sev, &timerid))
+ perror_msg_and_skip("timer_create");
+
+ if (timer_settime(timerid, 0, &its[i], NULL))
+ perror_msg_and_fail("timer_settime");
+
+ errno = pthread_create(&t[i], NULL, thread, (void *) &args[i]);
+ if (errno)
+ perror_msg_and_fail("pthread_create");
+ }
+
+ if (write(3, "\n", 1) != 1)
+ perror_msg_and_fail("write");
+
+ for (i = 0; i < N; ++i) {
+ retval_t retval;
+ errno = pthread_join(t[i], &retval.ptr);
+ if (errno)
+ perror_msg_and_fail("pthread_join");
+ errno = ENOENT;
+ printf("%-5d chdir(\"%s\") = -1 ENOENT (%m)\n"
+ "%-5d +++ exited with 0 +++\n",
+ retval.pid, child[i], retval.pid);
+ }
+
+ pid_t pid = getpid();
+ assert(chdir(text_parent) == -1);
+
+ printf("%-5d chdir(\"%s\") = -1 ENOENT (%m)\n"
+ "%-5d +++ exited with 0 +++\n", pid, text_parent, pid);
+
+ return 0;
+}
diff --git a/tests/attach-f-p.test b/tests/attach-f-p.test
new file mode 100755
index 0000000..ecae25f
--- /dev/null
+++ b/tests/attach-f-p.test
@@ -0,0 +1,51 @@
+#!/bin/sh
+#
+# Check that -f -p attaches to threads properly.
+#
+# Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
+# 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.
+
+. "${srcdir=.}/init.sh"
+
+# strace -f -p is implemented using /proc/$pid/task/
+[ -d /proc/self/task/ ] ||
+ framework_skip_ '/proc/self/task/ is not available'
+run_prog_skip_if_failed \
+ kill -0 $$
+run_prog ./attach-f-p > /dev/null 3>&1
+
+OUT="$LOG.out"
+EXP="$LOG.exp"
+./set_ptracer_any sh -c "exec ./attach-f-p > $EXP 3> $OUT" > /dev/null &
+tracee_pid=$!
+
+while ! [ -s "$OUT" ]; do
+ kill -0 $tracee_pid 2> /dev/null ||
+ fail_ 'set_ptracer_any sleep failed'
+done
+
+run_strace -a32 -f -echdir -esignal=none -p $tracee_pid
+match_diff "$LOG" "$EXP"
+rm -f "$EXP" "$OUT"
