2 files changed, 173 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/test_bpf_ma.c b/tools/testing/selftests/bpf/prog_tests/test_bpf_ma.c
new file mode 100644
index 000000000000..0cca4e8ae38e
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/test_bpf_ma.c
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (C) 2023. Huawei Technologies Co., Ltd */
+#define _GNU_SOURCE
+#include <sched.h>
+#include <pthread.h>
+#include <stdbool.h>
+#include <bpf/btf.h>
+#include <test_progs.h>
+
+#include "test_bpf_ma.skel.h"
+
+void test_test_bpf_ma(void)
+{
+	struct test_bpf_ma *skel;
+	struct btf *btf;
+	int i, err;
+
+	skel = test_bpf_ma__open();
+	if (!ASSERT_OK_PTR(skel, "open"))
+		return;
+
+	btf = bpf_object__btf(skel->obj);
+	if (!ASSERT_OK_PTR(btf, "btf"))
+		goto out;
+
+	for (i = 0; i < ARRAY_SIZE(skel->rodata->data_sizes); i++) {
+		char name[32];
+		int id;
+
+		snprintf(name, sizeof(name), "bin_data_%u", skel->rodata->data_sizes[i]);
+		id = btf__find_by_name_kind(btf, name, BTF_KIND_STRUCT);
+		if (!ASSERT_GT(id, 0, "bin_data"))
+			goto out;
+		skel->rodata->data_btf_ids[i] = id;
+	}
+
+	err = test_bpf_ma__load(skel);
+	if (!ASSERT_OK(err, "load"))
+		goto out;
+
+	err = test_bpf_ma__attach(skel);
+	if (!ASSERT_OK(err, "attach"))
+		goto out;
+
+	skel->bss->pid = getpid();
+	usleep(1);
+	ASSERT_OK(skel->bss->err, "test error");
+out:
+	test_bpf_ma__destroy(skel);
+}
diff --git a/tools/testing/selftests/bpf/progs/test_bpf_ma.c b/tools/testing/selftests/bpf/progs/test_bpf_ma.c
new file mode 100644
index 000000000000..ecde41ae0fc8
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/test_bpf_ma.c
@@ -0,0 +1,123 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (C) 2023. Huawei Technologies Co., Ltd */
+#include <vmlinux.h>
+#include <bpf/bpf_tracing.h>
+#include <bpf/bpf_helpers.h>
+
+#include "bpf_experimental.h"
+#include "bpf_misc.h"
+
+#ifndef ARRAY_SIZE
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+#endif
+
+struct generic_map_value {
+	void *data;
+};
+
+char _license[] SEC("license") = "GPL";
+
+const unsigned int data_sizes[] = {8, 16, 32, 64, 96, 128, 192, 256, 512, 1024, 2048, 4096};
+const volatile unsigned int data_btf_ids[ARRAY_SIZE(data_sizes)] = {};
+
+int err = 0;
+int pid = 0;
+
+#define DEFINE_ARRAY_WITH_KPTR(_size) \
+	struct bin_data_##_size { \
+		char data[_size - sizeof(void *)]; \
+	}; \
+	struct map_value_##_size { \
+		struct bin_data_##_size __kptr * data; \
+		/* To emit BTF info for bin_data_xx */ \
+		struct bin_data_##_size not_used; \
+	}; \
+	struct { \
+		__uint(type, BPF_MAP_TYPE_ARRAY); \
+		__type(key, int); \
+		__type(value, struct map_value_##_size); \
+		__uint(max_entries, 128); \
+	} array_##_size SEC(".maps");
+
+static __always_inline void batch_alloc_free(struct bpf_map *map, unsigned int batch,
+					     unsigned int idx)
+{
+	struct generic_map_value *value;
+	unsigned int i, key;
+	void *old, *new;
+
+	for (i = 0; i < batch; i++) {
+		key = i;
+		value = bpf_map_lookup_elem(map, &key);
+		if (!value) {
+			err = 1;
+			return;
+		}
+		new = bpf_obj_new_impl(data_btf_ids[idx], NULL);
+		if (!new) {
+			err = 2;
+			return;
+		}
+		old = bpf_kptr_xchg(&value->data, new);
+		if (old) {
+			bpf_obj_drop(old);
+			err = 3;
+			return;
+		}
+	}
+	for (i = 0; i < batch; i++) {
+		key = i;
+		value = bpf_map_lookup_elem(map, &key);
+		if (!value) {
+			err = 4;
+			return;
+		}
+		old = bpf_kptr_xchg(&value->data, NULL);
+		if (!old) {
+			err = 5;
+			return;
+		}
+		bpf_obj_drop(old);
+	}
+}
+
+#define CALL_BATCH_ALLOC_FREE(size, batch, idx) \
+	batch_alloc_free((struct bpf_map *)(&array_##size), batch, idx)
+
+DEFINE_ARRAY_WITH_KPTR(8);
+DEFINE_ARRAY_WITH_KPTR(16);
+DEFINE_ARRAY_WITH_KPTR(32);
+DEFINE_ARRAY_WITH_KPTR(64);
+DEFINE_ARRAY_WITH_KPTR(96);
+DEFINE_ARRAY_WITH_KPTR(128);
+DEFINE_ARRAY_WITH_KPTR(192);
+DEFINE_ARRAY_WITH_KPTR(256);
+DEFINE_ARRAY_WITH_KPTR(512);
+DEFINE_ARRAY_WITH_KPTR(1024);
+DEFINE_ARRAY_WITH_KPTR(2048);
+DEFINE_ARRAY_WITH_KPTR(4096);
+
+SEC("fentry/" SYS_PREFIX "sys_nanosleep")
+int test_bpf_mem_alloc_free(void *ctx)
+{
+	if ((u32)bpf_get_current_pid_tgid() != pid)
+		return 0;
+
+	/* Alloc 128 8-bytes objects in batch to trigger refilling,
+	 * then free 128 8-bytes objects in batch to trigger freeing.
+	 */
+	CALL_BATCH_ALLOC_FREE(8, 128, 0);
+	CALL_BATCH_ALLOC_FREE(16, 128, 1);
+	CALL_BATCH_ALLOC_FREE(32, 128, 2);
+	CALL_BATCH_ALLOC_FREE(64, 128, 3);
+	CALL_BATCH_ALLOC_FREE(96, 128, 4);
+	CALL_BATCH_ALLOC_FREE(128, 128, 5);
+	CALL_BATCH_ALLOC_FREE(192, 128, 6);
+	CALL_BATCH_ALLOC_FREE(256, 128, 7);
+	CALL_BATCH_ALLOC_FREE(512, 64, 8);
+	CALL_BATCH_ALLOC_FREE(1024, 32, 9);
+	CALL_BATCH_ALLOC_FREE(2048, 16, 10);
+	CALL_BATCH_ALLOC_FREE(4096, 8, 11);
+
+	return 0;
+}