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[src/trunk]: src/tests/lib/libbpfjit Add external memory tests.
details: https://anonhg.NetBSD.org/src/rev/6d9022c3f8d9
branches: trunk
changeset: 796930:6d9022c3f8d9
user: alnsn <alnsn%NetBSD.org@localhost>
date: Wed Jun 25 19:13:03 2014 +0000
description:
Add external memory tests.
diffstat:
tests/lib/libbpfjit/t_extmem.c | 479 +++++++++++++++++++++++++++++++++++++++++
1 files changed, 479 insertions(+), 0 deletions(-)
diffs (truncated from 483 to 300 lines):
diff -r 7b045cf45003 -r 6d9022c3f8d9 tests/lib/libbpfjit/t_extmem.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/lib/libbpfjit/t_extmem.c Wed Jun 25 19:13:03 2014 +0000
@@ -0,0 +1,479 @@
+/* $NetBSD: t_extmem.c,v 1.1 2014/06/25 19:13:03 alnsn Exp $ */
+
+/*-
+ * Copyright (c) 2014 Alexander Nasonov.
+ * 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 HOLDERS 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.
+ */
+
+#include <sys/cdefs.h>
+__RCSID("$NetBSD: t_extmem.c,v 1.1 2014/06/25 19:13:03 alnsn Exp $");
+
+#include <atf-c.h>
+#include <stdint.h>
+#include <string.h>
+
+#define __BPF_PRIVATE
+#include <net/bpf.h>
+#include <net/bpfjit.h>
+
+static uint32_t retM(const bpf_ctx_t *bc, bpf_args_t *args, uint32_t A);
+
+static const bpf_copfunc_t copfuncs[] = {
+ &retM
+};
+
+static const bpf_ctx_t ctx = {
+ .copfuncs = copfuncs,
+ .nfuncs = sizeof(copfuncs) / sizeof(copfuncs[0]),
+ .extwords = 4,
+ .preinited = BPF_MEMWORD_INIT(0) | BPF_MEMWORD_INIT(3),
+};
+
+static uint32_t
+retM(const bpf_ctx_t *bc, bpf_args_t *args, uint32_t A)
+{
+
+ return args->mem[(uintptr_t)args->arg];
+}
+
+
+ATF_TC(bpfjit_extmem_load_default);
+ATF_TC_HEAD(bpfjit_extmem_load_default, tc)
+{
+ atf_tc_set_md_var(tc, "descr", "Test that external memory "
+ "is zero initialized by default");
+}
+
+ATF_TC_BODY(bpfjit_extmem_load_default, tc)
+{
+ static struct bpf_insn insns[] = {
+ BPF_STMT(BPF_LD+BPF_MEM, 1),
+ BPF_STMT(BPF_RET+BPF_A, 0)
+ };
+
+ bpfjit_func_t code;
+ uint8_t pkt[1] = { 0 };
+ uint32_t mem[ctx.extwords];
+
+ /* Pre-inited words. */
+ mem[0] = 0;
+ mem[3] = 3;
+
+ bpf_args_t args = {
+ .pkt = pkt,
+ .buflen = sizeof(pkt),
+ .wirelen = sizeof(pkt),
+ .mem = mem,
+ };
+
+ size_t insn_count = sizeof(insns) / sizeof(insns[0]);
+
+ code = bpfjit_generate_code(&ctx, insns, insn_count);
+ ATF_REQUIRE(code != NULL);
+
+ ATF_CHECK(code(&ctx, &args) == 0);
+
+ bpfjit_free_code(code);
+}
+
+ATF_TC(bpfjit_extmem_load_preinited);
+ATF_TC_HEAD(bpfjit_extmem_load_preinited, tc)
+{
+ atf_tc_set_md_var(tc, "descr", "Test a load of external "
+ "pre-initialized memory");
+}
+
+ATF_TC_BODY(bpfjit_extmem_load_preinited, tc)
+{
+ static struct bpf_insn insns[] = {
+ BPF_STMT(BPF_LD+BPF_MEM, 3),
+ BPF_STMT(BPF_RET+BPF_A, 0)
+ };
+
+ bpfjit_func_t code;
+ uint8_t pkt[1] = { 0 };
+ uint32_t mem[ctx.extwords];
+
+ /* Pre-inited words. */
+ mem[0] = 0;
+ mem[3] = 3;
+
+ bpf_args_t args = {
+ .pkt = pkt,
+ .buflen = sizeof(pkt),
+ .wirelen = sizeof(pkt),
+ .mem = mem,
+ };
+
+ size_t insn_count = sizeof(insns) / sizeof(insns[0]);
+
+ code = bpfjit_generate_code(&ctx, insns, insn_count);
+ ATF_REQUIRE(code != NULL);
+
+ ATF_CHECK(code(&ctx, &args) == 3);
+
+ bpfjit_free_code(code);
+}
+
+ATF_TC(bpfjit_extmem_invalid_load);
+ATF_TC_HEAD(bpfjit_extmem_invalid_load, tc)
+{
+ atf_tc_set_md_var(tc, "descr", "Test that out-of-range load "
+ "fails validation");
+}
+
+ATF_TC_BODY(bpfjit_extmem_invalid_load, tc)
+{
+ static struct bpf_insn insns[] = {
+ BPF_STMT(BPF_LD+BPF_MEM, 4),
+ BPF_STMT(BPF_RET+BPF_A, 0)
+ };
+
+ size_t insn_count = sizeof(insns) / sizeof(insns[0]);
+
+ ATF_CHECK(bpfjit_generate_code(&ctx, insns, insn_count) == NULL);
+}
+
+ATF_TC(bpfjit_extmem_store);
+ATF_TC_HEAD(bpfjit_extmem_store, tc)
+{
+ atf_tc_set_md_var(tc, "descr", "Test stores to external memory");
+}
+
+ATF_TC_BODY(bpfjit_extmem_store, tc)
+{
+ static struct bpf_insn insns[] = {
+ BPF_STMT(BPF_LD+BPF_IMM, 1), /* A <- 1 */
+ BPF_STMT(BPF_LDX+BPF_W+BPF_IMM, 2), /* X <- 2 */
+ BPF_STMT(BPF_ST, 1), /* M[1] <- A */
+ BPF_STMT(BPF_ALU+BPF_ADD+BPF_X, 0), /* A <- A + X */
+ BPF_STMT(BPF_STX, 2), /* M[2] <- X */
+ BPF_STMT(BPF_ST, 3), /* M[3] <- A */
+ BPF_STMT(BPF_RET+BPF_A, 0) /* ret A */
+ };
+
+ bpfjit_func_t code;
+ uint8_t pkt[1] = { 0 };
+ uint32_t mem[ctx.extwords];
+
+ /* Pre-inited words. */
+ mem[0] = 0;
+ mem[3] = 7;
+
+ mem[1] = mem[2] = 0xdeadbeef;
+
+ bpf_args_t args = {
+ .pkt = pkt,
+ .buflen = sizeof(pkt),
+ .wirelen = sizeof(pkt),
+ .mem = mem,
+ };
+
+ size_t insn_count = sizeof(insns) / sizeof(insns[0]);
+
+ code = bpfjit_generate_code(&ctx, insns, insn_count);
+ ATF_REQUIRE(code != NULL);
+
+ ATF_CHECK(code(&ctx, &args) == 3);
+
+ bpfjit_free_code(code);
+
+ ATF_CHECK(mem[0] == 0);
+ ATF_CHECK(mem[1] == 1);
+ ATF_CHECK(mem[2] == 2);
+ ATF_CHECK(mem[3] == 3);
+}
+
+ATF_TC(bpfjit_extmem_side_effect);
+ATF_TC_HEAD(bpfjit_extmem_side_effect, tc)
+{
+ atf_tc_set_md_var(tc, "descr", "Test that ABC optimization doesn\'t "
+ "skip stores to external memory");
+}
+
+ATF_TC_BODY(bpfjit_extmem_side_effect, tc)
+{
+ static struct bpf_insn insns[] = {
+ BPF_STMT(BPF_LD+BPF_B+BPF_ABS, 0), /* A <- P[0] */
+ BPF_STMT(BPF_LDX+BPF_W+BPF_IMM, 2), /* X <- 2 */
+ BPF_STMT(BPF_ST, 1), /* M[1] <- A */
+ BPF_STMT(BPF_ALU+BPF_ADD+BPF_X, 0), /* A <- A + X */
+ BPF_STMT(BPF_STX, 2), /* M[2] <- X */
+ BPF_STMT(BPF_ST, 3), /* M[3] <- A */
+ BPF_STMT(BPF_LD+BPF_B+BPF_ABS, 99), /* A <- P[99] */
+ BPF_STMT(BPF_RET+BPF_A, 0) /* ret A */
+ };
+
+ bpfjit_func_t code;
+ uint8_t pkt[1] = { 1 };
+ uint32_t mem[ctx.extwords];
+
+ /* Pre-inited words. */
+ mem[0] = 0;
+ mem[3] = 7;
+
+ mem[1] = mem[2] = 0xdeadbeef;
+
+ bpf_args_t args = {
+ .pkt = pkt,
+ .buflen = sizeof(pkt),
+ .wirelen = sizeof(pkt),
+ .mem = mem,
+ };
+
+ size_t insn_count = sizeof(insns) / sizeof(insns[0]);
+
+ code = bpfjit_generate_code(&ctx, insns, insn_count);
+ ATF_REQUIRE(code != NULL);
+
+ ATF_CHECK(code(&ctx, &args) == 0);
+
+ bpfjit_free_code(code);
+
+ ATF_CHECK(mem[0] == 0);
+ ATF_CHECK(mem[1] == 1);
+ ATF_CHECK(mem[2] == 2);
+ ATF_CHECK(mem[3] == 3);
+}
+
+ATF_TC(bpfjit_extmem_invalid_store);
+ATF_TC_HEAD(bpfjit_extmem_invalid_store, tc)
+{
+ atf_tc_set_md_var(tc, "descr", "Test that out-of-range store "
+ "fails validation");
+}
+
+ATF_TC_BODY(bpfjit_extmem_invalid_store, tc)
+{
+ static struct bpf_insn insns[] = {
+ BPF_STMT(BPF_ST, 4),
+ BPF_STMT(BPF_RET+BPF_A, 0)
+ };
+
+ size_t insn_count = sizeof(insns) / sizeof(insns[0]);
+
+ ATF_CHECK(bpfjit_generate_code(&ctx, insns, insn_count) == NULL);
+}
+
+ATF_TC(bpfjit_cop_ret_mem);
+ATF_TC_HEAD(bpfjit_cop_ret_mem, tc)
+{
+ atf_tc_set_md_var(tc, "descr", "Test coprocessor function "
+ "that returns a content of external memory word");
+}
+
+ATF_TC_BODY(bpfjit_cop_ret_mem, tc)
+{
+ static struct bpf_insn insns[] = {
+ BPF_STMT(BPF_LD+BPF_IMM, 13),
+ BPF_STMT(BPF_ST, 2),
+ BPF_STMT(BPF_LD+BPF_IMM, 137),
+ BPF_STMT(BPF_ST, 1),
+ BPF_STMT(BPF_MISC+BPF_COP, 0), // retM
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