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Index: head/tests/sys/kern/Makefile
===================================================================
--- head/tests/sys/kern/Makefile
+++ head/tests/sys/kern/Makefile
@@ -14,6 +14,11 @@
TEST_METADATA.unix_seqpacket_test+= timeout="15"
ATF_TESTS_C+= waitpid_nohang
+ATF_TESTS_SH+= coredump_phnum_test
+
+BINDIR= ${TESTSDIR}
+PROGS+= coredump_phnum_helper
+
LIBADD.ptrace_test+= pthread
LIBADD.unix_seqpacket_test+= pthread
Index: head/tests/sys/kern/coredump_phnum_helper.c
===================================================================
--- head/tests/sys/kern/coredump_phnum_helper.c
+++ head/tests/sys/kern/coredump_phnum_helper.c
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2016, Conrad Meyer
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/param.h>
+#include <sys/mman.h>
+
+#include <err.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+/*
+ * This program is intended to create a bunch of segment mappings, then dump
+ * core.
+ */
+int
+main(int argc __unused, char **argv __unused)
+{
+ void *v;
+ unsigned i;
+
+ for (i = 0; i < UINT16_MAX + 1000; i++) {
+ /*
+ * Alternate protections; otherwise the kernel will just extend
+ * the adjacent same-protection previous mapping.
+ */
+ v = mmap(NULL, PAGE_SIZE,
+ (((i % 2) == 0) ? PROT_READ : 0) | PROT_WRITE,
+ MAP_ANON | MAP_PRIVATE, -1, 0);
+ if (v == MAP_FAILED)
+ err(1, "mmap");
+ }
+
+ /* Dump core. */
+ abort();
+}
Index: head/tests/sys/kern/coredump_phnum_test.sh
===================================================================
--- head/tests/sys/kern/coredump_phnum_test.sh
+++ head/tests/sys/kern/coredump_phnum_test.sh
@@ -0,0 +1,90 @@
+#
+# Copyright (c) 2016 Dell EMC Isilon
+# 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,
+# without modification.
+# 2. Redistributions in binary form must reproduce at minimum a disclaimer
+# substantially similar to the "NO WARRANTY" disclaimer below
+# ("Disclaimer") and any redistribution must be conditioned upon
+# including a substantially similar Disclaimer requirement for further
+# binary redistribution.
+#
+# NO WARRANTY
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
+#
+# $FreeBSD$
+
+atf_test_case coredump_phnum cleanup
+coredump_phnum_head()
+{
+ atf_set "allow_sysctl_side_effects" "1"
+ atf_set "descr" "More than 65534 segments"
+ atf_set "require.progs" "readelf procstat"
+ atf_set "require.user" "root"
+}
+coredump_phnum_body()
+{
+ # Set up core dumping
+ cat > coredump_phnum_restore_state.sh <<-EOF
+ #!/bin/sh
+ ulimit -c '$(ulimit -c)'
+ sysctl kern.coredump=$(sysctl -n kern.coredump)
+ sysctl kern.corefile='$(sysctl -n kern.corefile)'
+EOF
+ chmod +x coredump_phnum_restore_state.sh
+
+ ulimit -c unlimited
+ sysctl kern.coredump=1
+ sysctl kern.corefile="$(pwd)/coredump_phnum_helper.core"
+
+ atf_check -s signal:sigabrt "$(atf_get_srcdir)/coredump_phnum_helper"
+
+ # Check that core looks good
+ if [ ! -f coredump_phnum_helper.core ]; then
+ atf_fail "Helper program did not dump core"
+ fi
+
+ # These magic numbers don't have any real significance. They are just
+ # the result of running the helper program and dumping core. The only
+ # important bit is that they're larger than 65535 (UINT16_MAX).
+ readelf -h coredump_phnum_helper.core | \
+ atf_check -o "match:65535 \(66169\)" \
+ grep "Number of program headers:"
+ readelf -l coredump_phnum_helper.core | \
+ atf_check -o "match:There are 66169 program headers" \
+ grep -1 "program headers"
+ readelf -S coredump_phnum_helper.core | \
+ atf_check -o "match: 0000000000000001 .* 66169 " \
+ grep -A1 "^ \[ 0\] "
+
+ procstat -v coredump_phnum_helper.core | \
+ atf_check -o "match:66545" wc -l
+}
+coredump_phnum_cleanup()
+{
+ rm -f coredump_phnum_helper.core
+ if [ -x coredump_phnum_restore_state.sh ]; then
+ ./coredump_phnum_restore_state.sh
+ fi
+ rm -f coredump_phnum_restore_state.sh
+}
+
+atf_init_test_cases()
+{
+ atf_add_test_case coredump_phnum
+}

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