stress2: Added a test scenario from Bug 227041

tools/test/stress2/misc/pmc8.sh

@@ -0,0 +1,116 @@
+#!/bin/sh
+
+# https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=227041
+
+# panic: [pmc,2749] (ri21, rc1) waiting too long for pmc to be free
+# cpuid = 23
+# time = 1624293771
+# KDB: stack backtrace:
+# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe01ab083850
+# vpanic() at vpanic+0x181/frame 0xfffffe01ab0838a0
+# panic() at panic+0x43/frame 0xfffffe01ab083900
+# pmc_wait_for_pmc_idle() at pmc_wait_for_pmc_idle+0xa2/frame 0xfffffe01ab083930
+# pmc_release_pmc_descriptor() at pmc_release_pmc_descriptor+0x20b/frame 0xfffffe01ab083980
+# pmc_syscall_handler() at pmc_syscall_handler+0x4bd/frame 0xfffffe01ab083ac0
+# amd64_syscall() at amd64_syscall+0x762/frame 0xfffffe01ab083bf0
+# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe01ab083bf0
+# --- syscall (0, FreeBSD ELF64, nosys), rip = 0x8009c154a, rsp = 0x7fffffffe4d8, rbp = 0x7fffffffe500 ---
+# KDB: enter: panic
+# [ thread pid 3123 tid 100454 ]
+# Stopped at      kdb_enter+0x37: movq    $0,0x1285d1e(%rip)
+# db> x/s version
+# version: FreeBSD 14.0-CURRENT #1 ufs-n247476-f77f86ecfea: Mon Jun 21 08:40:40 CEST 2021
+# pho@t2.osted.lan:/var/tmp/deviant3/sys/amd64/compile/PHO
+# db>
+
+. ../default.cfg
+cat > /tmp/pmc-crash.c <<EOF
+/*
+	Copyright (c) 2018 Dominic Dwyer <dom@itsallbroken.com>
+	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.
+
+	clang -lpmc pmc-crash.c -o pmc-crash
+*/
+
+#include <sys/types.h>
+#include <errno.h>
+#include <pmc.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+int main(void)
+{
+	if (pmc_init() != 0)
+	{
+		printf("pmc_init %s", strerror(errno));
+		exit(-1);
+	}
+
+	pmc_id_t pmc_id = 0;
+	if (pmc_allocate("inst_retired.any", PMC_MODE_TC, 0, PMC_CPU_ANY,
+	    &pmc_id, 1024) != 0)
+	{
+		printf("pmc_allocate %s", strerror(errno));
+		exit(-1);
+	}
+
+	printf("attaching to self\n");
+	if (pmc_attach(pmc_id, 0) != 0)
+	{
+		printf("pmc_attach %s", strerror(errno));
+		exit(-1);
+	}
+
+	if (pmc_start(pmc_id) != 0)
+	{
+		printf("pmc_start %s", strerror(errno));
+		exit(-1);
+	}
+
+	pmc_value_t v = 0;
+	for (int i = 0; i < 100; i++)
+	{
+		pmc_read(pmc_id, &v);
+	}
+	pmc_stop(pmc_id);
+
+	printf("success, detaching...\n");
+	pmc_detach(pmc_id, 0);
+	pmc_release(pmc_id);
+
+	printf("ok?");
+}
+EOF
+mycc -o /tmp/pmc-crash -Wall -Wextra -O0 /tmp/pmc-crash.c -lpmc || exit
+kldstat -v | grep -q hwpmc  || { kldload hwpmc; loaded=1; }
+here=`pwd`
+cd /tmp
+./pmc-crash; s=$?
+cd $here
+rm -f /tmp/pmc-crash /tmp/pmc-crash.core /tmp/pmc-crash.c
+[ $loaded ] && kldunload hwpmc
+exit $s