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Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/btf_dedup_split.c')
-rw-r--r--tools/testing/selftests/bpf/prog_tests/btf_dedup_split.c554
1 files changed, 554 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/btf_dedup_split.c b/tools/testing/selftests/bpf/prog_tests/btf_dedup_split.c
new file mode 100644
index 000000000000..5bc15bb6b7ce
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/btf_dedup_split.c
@@ -0,0 +1,554 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2020 Facebook */
+#include <test_progs.h>
+#include <bpf/btf.h>
+#include "btf_helpers.h"
+
+static void test_split_simple() {
+ const struct btf_type *t;
+ struct btf *btf1, *btf2;
+ int str_off, err;
+
+ btf1 = btf__new_empty();
+ if (!ASSERT_OK_PTR(btf1, "empty_main_btf"))
+ return;
+
+ btf__set_pointer_size(btf1, 8); /* enforce 64-bit arch */
+
+ btf__add_int(btf1, "int", 4, BTF_INT_SIGNED); /* [1] int */
+ btf__add_ptr(btf1, 1); /* [2] ptr to int */
+ btf__add_struct(btf1, "s1", 4); /* [3] struct s1 { */
+ btf__add_field(btf1, "f1", 1, 0, 0); /* int f1; */
+ /* } */
+
+ VALIDATE_RAW_BTF(
+ btf1,
+ "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
+ "[2] PTR '(anon)' type_id=1",
+ "[3] STRUCT 's1' size=4 vlen=1\n"
+ "\t'f1' type_id=1 bits_offset=0");
+
+ ASSERT_STREQ(btf_type_c_dump(btf1), "\
+struct s1 {\n\
+ int f1;\n\
+};\n\n", "c_dump");
+
+ btf2 = btf__new_empty_split(btf1);
+ if (!ASSERT_OK_PTR(btf2, "empty_split_btf"))
+ goto cleanup;
+
+ /* pointer size should be "inherited" from main BTF */
+ ASSERT_EQ(btf__pointer_size(btf2), 8, "inherit_ptr_sz");
+
+ str_off = btf__find_str(btf2, "int");
+ ASSERT_NEQ(str_off, -ENOENT, "str_int_missing");
+
+ t = btf__type_by_id(btf2, 1);
+ if (!ASSERT_OK_PTR(t, "int_type"))
+ goto cleanup;
+ ASSERT_EQ(btf_is_int(t), true, "int_kind");
+ ASSERT_STREQ(btf__str_by_offset(btf2, t->name_off), "int", "int_name");
+
+ btf__add_struct(btf2, "s2", 16); /* [4] struct s2 { */
+ btf__add_field(btf2, "f1", 6, 0, 0); /* struct s1 f1; */
+ btf__add_field(btf2, "f2", 5, 32, 0); /* int f2; */
+ btf__add_field(btf2, "f3", 2, 64, 0); /* int *f3; */
+ /* } */
+
+ /* duplicated int */
+ btf__add_int(btf2, "int", 4, BTF_INT_SIGNED); /* [5] int */
+
+ /* duplicated struct s1 */
+ btf__add_struct(btf2, "s1", 4); /* [6] struct s1 { */
+ btf__add_field(btf2, "f1", 5, 0, 0); /* int f1; */
+ /* } */
+
+ VALIDATE_RAW_BTF(
+ btf2,
+ "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
+ "[2] PTR '(anon)' type_id=1",
+ "[3] STRUCT 's1' size=4 vlen=1\n"
+ "\t'f1' type_id=1 bits_offset=0",
+ "[4] STRUCT 's2' size=16 vlen=3\n"
+ "\t'f1' type_id=6 bits_offset=0\n"
+ "\t'f2' type_id=5 bits_offset=32\n"
+ "\t'f3' type_id=2 bits_offset=64",
+ "[5] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
+ "[6] STRUCT 's1' size=4 vlen=1\n"
+ "\t'f1' type_id=5 bits_offset=0");
+
+ ASSERT_STREQ(btf_type_c_dump(btf2), "\
+struct s1 {\n\
+ int f1;\n\
+};\n\
+\n\
+struct s1___2 {\n\
+ int f1;\n\
+};\n\
+\n\
+struct s2 {\n\
+ struct s1___2 f1;\n\
+ int f2;\n\
+ int *f3;\n\
+};\n\n", "c_dump");
+
+ err = btf__dedup(btf2, NULL);
+ if (!ASSERT_OK(err, "btf_dedup"))
+ goto cleanup;
+
+ VALIDATE_RAW_BTF(
+ btf2,
+ "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
+ "[2] PTR '(anon)' type_id=1",
+ "[3] STRUCT 's1' size=4 vlen=1\n"
+ "\t'f1' type_id=1 bits_offset=0",
+ "[4] STRUCT 's2' size=16 vlen=3\n"
+ "\t'f1' type_id=3 bits_offset=0\n"
+ "\t'f2' type_id=1 bits_offset=32\n"
+ "\t'f3' type_id=2 bits_offset=64");
+
+ ASSERT_STREQ(btf_type_c_dump(btf2), "\
+struct s1 {\n\
+ int f1;\n\
+};\n\
+\n\
+struct s2 {\n\
+ struct s1 f1;\n\
+ int f2;\n\
+ int *f3;\n\
+};\n\n", "c_dump");
+
+cleanup:
+ btf__free(btf2);
+ btf__free(btf1);
+}
+
+static void test_split_fwd_resolve() {
+ struct btf *btf1, *btf2;
+ int err;
+
+ btf1 = btf__new_empty();
+ if (!ASSERT_OK_PTR(btf1, "empty_main_btf"))
+ return;
+
+ btf__set_pointer_size(btf1, 8); /* enforce 64-bit arch */
+
+ btf__add_int(btf1, "int", 4, BTF_INT_SIGNED); /* [1] int */
+ btf__add_ptr(btf1, 4); /* [2] ptr to struct s1 */
+ btf__add_ptr(btf1, 5); /* [3] ptr to struct s2 */
+ btf__add_struct(btf1, "s1", 16); /* [4] struct s1 { */
+ btf__add_field(btf1, "f1", 2, 0, 0); /* struct s1 *f1; */
+ btf__add_field(btf1, "f2", 3, 64, 0); /* struct s2 *f2; */
+ /* } */
+ btf__add_struct(btf1, "s2", 4); /* [5] struct s2 { */
+ btf__add_field(btf1, "f1", 1, 0, 0); /* int f1; */
+ /* } */
+ /* keep this not a part of type the graph to test btf_dedup_resolve_fwds */
+ btf__add_struct(btf1, "s3", 4); /* [6] struct s3 { */
+ btf__add_field(btf1, "f1", 1, 0, 0); /* int f1; */
+ /* } */
+
+ VALIDATE_RAW_BTF(
+ btf1,
+ "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
+ "[2] PTR '(anon)' type_id=4",
+ "[3] PTR '(anon)' type_id=5",
+ "[4] STRUCT 's1' size=16 vlen=2\n"
+ "\t'f1' type_id=2 bits_offset=0\n"
+ "\t'f2' type_id=3 bits_offset=64",
+ "[5] STRUCT 's2' size=4 vlen=1\n"
+ "\t'f1' type_id=1 bits_offset=0",
+ "[6] STRUCT 's3' size=4 vlen=1\n"
+ "\t'f1' type_id=1 bits_offset=0");
+
+ btf2 = btf__new_empty_split(btf1);
+ if (!ASSERT_OK_PTR(btf2, "empty_split_btf"))
+ goto cleanup;
+
+ btf__add_int(btf2, "int", 4, BTF_INT_SIGNED); /* [7] int */
+ btf__add_ptr(btf2, 11); /* [8] ptr to struct s1 */
+ btf__add_fwd(btf2, "s2", BTF_FWD_STRUCT); /* [9] fwd for struct s2 */
+ btf__add_ptr(btf2, 9); /* [10] ptr to fwd struct s2 */
+ btf__add_struct(btf2, "s1", 16); /* [11] struct s1 { */
+ btf__add_field(btf2, "f1", 8, 0, 0); /* struct s1 *f1; */
+ btf__add_field(btf2, "f2", 10, 64, 0); /* struct s2 *f2; */
+ /* } */
+ btf__add_fwd(btf2, "s3", BTF_FWD_STRUCT); /* [12] fwd for struct s3 */
+ btf__add_ptr(btf2, 12); /* [13] ptr to struct s1 */
+
+ VALIDATE_RAW_BTF(
+ btf2,
+ "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
+ "[2] PTR '(anon)' type_id=4",
+ "[3] PTR '(anon)' type_id=5",
+ "[4] STRUCT 's1' size=16 vlen=2\n"
+ "\t'f1' type_id=2 bits_offset=0\n"
+ "\t'f2' type_id=3 bits_offset=64",
+ "[5] STRUCT 's2' size=4 vlen=1\n"
+ "\t'f1' type_id=1 bits_offset=0",
+ "[6] STRUCT 's3' size=4 vlen=1\n"
+ "\t'f1' type_id=1 bits_offset=0",
+ "[7] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
+ "[8] PTR '(anon)' type_id=11",
+ "[9] FWD 's2' fwd_kind=struct",
+ "[10] PTR '(anon)' type_id=9",
+ "[11] STRUCT 's1' size=16 vlen=2\n"
+ "\t'f1' type_id=8 bits_offset=0\n"
+ "\t'f2' type_id=10 bits_offset=64",
+ "[12] FWD 's3' fwd_kind=struct",
+ "[13] PTR '(anon)' type_id=12");
+
+ err = btf__dedup(btf2, NULL);
+ if (!ASSERT_OK(err, "btf_dedup"))
+ goto cleanup;
+
+ VALIDATE_RAW_BTF(
+ btf2,
+ "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
+ "[2] PTR '(anon)' type_id=4",
+ "[3] PTR '(anon)' type_id=5",
+ "[4] STRUCT 's1' size=16 vlen=2\n"
+ "\t'f1' type_id=2 bits_offset=0\n"
+ "\t'f2' type_id=3 bits_offset=64",
+ "[5] STRUCT 's2' size=4 vlen=1\n"
+ "\t'f1' type_id=1 bits_offset=0",
+ "[6] STRUCT 's3' size=4 vlen=1\n"
+ "\t'f1' type_id=1 bits_offset=0",
+ "[7] PTR '(anon)' type_id=6");
+
+cleanup:
+ btf__free(btf2);
+ btf__free(btf1);
+}
+
+static void test_split_struct_duped() {
+ struct btf *btf1, *btf2;
+ int err;
+
+ btf1 = btf__new_empty();
+ if (!ASSERT_OK_PTR(btf1, "empty_main_btf"))
+ return;
+
+ btf__set_pointer_size(btf1, 8); /* enforce 64-bit arch */
+
+ btf__add_int(btf1, "int", 4, BTF_INT_SIGNED); /* [1] int */
+ btf__add_ptr(btf1, 5); /* [2] ptr to struct s1 */
+ btf__add_fwd(btf1, "s2", BTF_FWD_STRUCT); /* [3] fwd for struct s2 */
+ btf__add_ptr(btf1, 3); /* [4] ptr to fwd struct s2 */
+ btf__add_struct(btf1, "s1", 16); /* [5] struct s1 { */
+ btf__add_field(btf1, "f1", 2, 0, 0); /* struct s1 *f1; */
+ btf__add_field(btf1, "f2", 4, 64, 0); /* struct s2 *f2; */
+ /* } */
+
+ VALIDATE_RAW_BTF(
+ btf1,
+ "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
+ "[2] PTR '(anon)' type_id=5",
+ "[3] FWD 's2' fwd_kind=struct",
+ "[4] PTR '(anon)' type_id=3",
+ "[5] STRUCT 's1' size=16 vlen=2\n"
+ "\t'f1' type_id=2 bits_offset=0\n"
+ "\t'f2' type_id=4 bits_offset=64");
+
+ btf2 = btf__new_empty_split(btf1);
+ if (!ASSERT_OK_PTR(btf2, "empty_split_btf"))
+ goto cleanup;
+
+ btf__add_int(btf2, "int", 4, BTF_INT_SIGNED); /* [6] int */
+ btf__add_ptr(btf2, 10); /* [7] ptr to struct s1 */
+ btf__add_fwd(btf2, "s2", BTF_FWD_STRUCT); /* [8] fwd for struct s2 */
+ btf__add_ptr(btf2, 11); /* [9] ptr to struct s2 */
+ btf__add_struct(btf2, "s1", 16); /* [10] struct s1 { */
+ btf__add_field(btf2, "f1", 7, 0, 0); /* struct s1 *f1; */
+ btf__add_field(btf2, "f2", 9, 64, 0); /* struct s2 *f2; */
+ /* } */
+ btf__add_struct(btf2, "s2", 40); /* [11] struct s2 { */
+ btf__add_field(btf2, "f1", 7, 0, 0); /* struct s1 *f1; */
+ btf__add_field(btf2, "f2", 9, 64, 0); /* struct s2 *f2; */
+ btf__add_field(btf2, "f3", 6, 128, 0); /* int f3; */
+ btf__add_field(btf2, "f4", 10, 192, 0); /* struct s1 f4; */
+ /* } */
+ btf__add_ptr(btf2, 8); /* [12] ptr to fwd struct s2 */
+ btf__add_struct(btf2, "s3", 8); /* [13] struct s3 { */
+ btf__add_field(btf2, "f1", 12, 0, 0); /* struct s2 *f1; (fwd) */
+ /* } */
+
+ VALIDATE_RAW_BTF(
+ btf2,
+ "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
+ "[2] PTR '(anon)' type_id=5",
+ "[3] FWD 's2' fwd_kind=struct",
+ "[4] PTR '(anon)' type_id=3",
+ "[5] STRUCT 's1' size=16 vlen=2\n"
+ "\t'f1' type_id=2 bits_offset=0\n"
+ "\t'f2' type_id=4 bits_offset=64",
+ "[6] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
+ "[7] PTR '(anon)' type_id=10",
+ "[8] FWD 's2' fwd_kind=struct",
+ "[9] PTR '(anon)' type_id=11",
+ "[10] STRUCT 's1' size=16 vlen=2\n"
+ "\t'f1' type_id=7 bits_offset=0\n"
+ "\t'f2' type_id=9 bits_offset=64",
+ "[11] STRUCT 's2' size=40 vlen=4\n"
+ "\t'f1' type_id=7 bits_offset=0\n"
+ "\t'f2' type_id=9 bits_offset=64\n"
+ "\t'f3' type_id=6 bits_offset=128\n"
+ "\t'f4' type_id=10 bits_offset=192",
+ "[12] PTR '(anon)' type_id=8",
+ "[13] STRUCT 's3' size=8 vlen=1\n"
+ "\t'f1' type_id=12 bits_offset=0");
+
+ err = btf__dedup(btf2, NULL);
+ if (!ASSERT_OK(err, "btf_dedup"))
+ goto cleanup;
+
+ VALIDATE_RAW_BTF(
+ btf2,
+ "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
+ "[2] PTR '(anon)' type_id=5",
+ "[3] FWD 's2' fwd_kind=struct",
+ "[4] PTR '(anon)' type_id=3",
+ "[5] STRUCT 's1' size=16 vlen=2\n"
+ "\t'f1' type_id=2 bits_offset=0\n"
+ "\t'f2' type_id=4 bits_offset=64",
+ "[6] PTR '(anon)' type_id=8",
+ "[7] PTR '(anon)' type_id=9",
+ "[8] STRUCT 's1' size=16 vlen=2\n"
+ "\t'f1' type_id=6 bits_offset=0\n"
+ "\t'f2' type_id=7 bits_offset=64",
+ "[9] STRUCT 's2' size=40 vlen=4\n"
+ "\t'f1' type_id=6 bits_offset=0\n"
+ "\t'f2' type_id=7 bits_offset=64\n"
+ "\t'f3' type_id=1 bits_offset=128\n"
+ "\t'f4' type_id=8 bits_offset=192",
+ "[10] STRUCT 's3' size=8 vlen=1\n"
+ "\t'f1' type_id=7 bits_offset=0");
+
+cleanup:
+ btf__free(btf2);
+ btf__free(btf1);
+}
+
+static void btf_add_dup_struct_in_cu(struct btf *btf, int start_id)
+{
+#define ID(n) (start_id + n)
+ btf__set_pointer_size(btf, 8); /* enforce 64-bit arch */
+
+ btf__add_int(btf, "int", 4, BTF_INT_SIGNED); /* [1] int */
+
+ btf__add_struct(btf, "s", 8); /* [2] struct s { */
+ btf__add_field(btf, "a", ID(3), 0, 0); /* struct anon a; */
+ btf__add_field(btf, "b", ID(4), 0, 0); /* struct anon b; */
+ /* } */
+
+ btf__add_struct(btf, "(anon)", 8); /* [3] struct anon { */
+ btf__add_field(btf, "f1", ID(1), 0, 0); /* int f1; */
+ btf__add_field(btf, "f2", ID(1), 32, 0); /* int f2; */
+ /* } */
+
+ btf__add_struct(btf, "(anon)", 8); /* [4] struct anon { */
+ btf__add_field(btf, "f1", ID(1), 0, 0); /* int f1; */
+ btf__add_field(btf, "f2", ID(1), 32, 0); /* int f2; */
+ /* } */
+#undef ID
+}
+
+static void test_split_dup_struct_in_cu()
+{
+ struct btf *btf1, *btf2 = NULL;
+ int err;
+
+ /* generate the base data.. */
+ btf1 = btf__new_empty();
+ if (!ASSERT_OK_PTR(btf1, "empty_main_btf"))
+ return;
+
+ btf_add_dup_struct_in_cu(btf1, 0);
+
+ VALIDATE_RAW_BTF(
+ btf1,
+ "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
+ "[2] STRUCT 's' size=8 vlen=2\n"
+ "\t'a' type_id=3 bits_offset=0\n"
+ "\t'b' type_id=4 bits_offset=0",
+ "[3] STRUCT '(anon)' size=8 vlen=2\n"
+ "\t'f1' type_id=1 bits_offset=0\n"
+ "\t'f2' type_id=1 bits_offset=32",
+ "[4] STRUCT '(anon)' size=8 vlen=2\n"
+ "\t'f1' type_id=1 bits_offset=0\n"
+ "\t'f2' type_id=1 bits_offset=32");
+
+ /* ..dedup them... */
+ err = btf__dedup(btf1, NULL);
+ if (!ASSERT_OK(err, "btf_dedup"))
+ goto cleanup;
+
+ VALIDATE_RAW_BTF(
+ btf1,
+ "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
+ "[2] STRUCT 's' size=8 vlen=2\n"
+ "\t'a' type_id=3 bits_offset=0\n"
+ "\t'b' type_id=3 bits_offset=0",
+ "[3] STRUCT '(anon)' size=8 vlen=2\n"
+ "\t'f1' type_id=1 bits_offset=0\n"
+ "\t'f2' type_id=1 bits_offset=32");
+
+ /* and add the same data on top of it */
+ btf2 = btf__new_empty_split(btf1);
+ if (!ASSERT_OK_PTR(btf2, "empty_split_btf"))
+ goto cleanup;
+
+ btf_add_dup_struct_in_cu(btf2, 3);
+
+ VALIDATE_RAW_BTF(
+ btf2,
+ "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
+ "[2] STRUCT 's' size=8 vlen=2\n"
+ "\t'a' type_id=3 bits_offset=0\n"
+ "\t'b' type_id=3 bits_offset=0",
+ "[3] STRUCT '(anon)' size=8 vlen=2\n"
+ "\t'f1' type_id=1 bits_offset=0\n"
+ "\t'f2' type_id=1 bits_offset=32",
+ "[4] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
+ "[5] STRUCT 's' size=8 vlen=2\n"
+ "\t'a' type_id=6 bits_offset=0\n"
+ "\t'b' type_id=7 bits_offset=0",
+ "[6] STRUCT '(anon)' size=8 vlen=2\n"
+ "\t'f1' type_id=4 bits_offset=0\n"
+ "\t'f2' type_id=4 bits_offset=32",
+ "[7] STRUCT '(anon)' size=8 vlen=2\n"
+ "\t'f1' type_id=4 bits_offset=0\n"
+ "\t'f2' type_id=4 bits_offset=32");
+
+ err = btf__dedup(btf2, NULL);
+ if (!ASSERT_OK(err, "btf_dedup"))
+ goto cleanup;
+
+ /* after dedup it should match the original data */
+ VALIDATE_RAW_BTF(
+ btf2,
+ "[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
+ "[2] STRUCT 's' size=8 vlen=2\n"
+ "\t'a' type_id=3 bits_offset=0\n"
+ "\t'b' type_id=3 bits_offset=0",
+ "[3] STRUCT '(anon)' size=8 vlen=2\n"
+ "\t'f1' type_id=1 bits_offset=0\n"
+ "\t'f2' type_id=1 bits_offset=32");
+
+cleanup:
+ btf__free(btf2);
+ btf__free(btf1);
+}
+
+/* Ensure module split BTF dedup worked correctly; when dedup fails badly
+ * core kernel types are in split BTF also, so ensure that references to
+ * such types point at base - not split - BTF.
+ *
+ * bpf_testmod_test_write() has multiple core kernel type parameters;
+ *
+ * ssize_t
+ * bpf_testmod_test_write(struct file *file, struct kobject *kobj,
+ * struct bin_attribute *bin_attr,
+ * char *buf, loff_t off, size_t len);
+ *
+ * Ensure each of the FUNC_PROTO params is a core kernel type.
+ *
+ * Do the same for
+ *
+ * __bpf_kfunc struct sock *bpf_kfunc_call_test3(struct sock *sk);
+ *
+ * ...and
+ *
+ * __bpf_kfunc void bpf_kfunc_call_test_pass_ctx(struct __sk_buff *skb);
+ *
+ */
+const char *mod_funcs[] = {
+ "bpf_testmod_test_write",
+ "bpf_kfunc_call_test3",
+ "bpf_kfunc_call_test_pass_ctx"
+};
+
+static void test_split_module(void)
+{
+ struct btf *vmlinux_btf, *btf1 = NULL;
+ int i, nr_base_types;
+
+ vmlinux_btf = btf__load_vmlinux_btf();
+ if (!ASSERT_OK_PTR(vmlinux_btf, "vmlinux_btf"))
+ return;
+ nr_base_types = btf__type_cnt(vmlinux_btf);
+ if (!ASSERT_GT(nr_base_types, 0, "nr_base_types"))
+ goto cleanup;
+
+ btf1 = btf__parse_split("/sys/kernel/btf/bpf_testmod", vmlinux_btf);
+ if (!ASSERT_OK_PTR(btf1, "split_btf"))
+ return;
+
+ for (i = 0; i < ARRAY_SIZE(mod_funcs); i++) {
+ const struct btf_param *p;
+ const struct btf_type *t;
+ __u16 vlen;
+ __u32 id;
+ int j;
+
+ id = btf__find_by_name_kind(btf1, mod_funcs[i], BTF_KIND_FUNC);
+ if (!ASSERT_GE(id, nr_base_types, "func_id"))
+ goto cleanup;
+ t = btf__type_by_id(btf1, id);
+ if (!ASSERT_OK_PTR(t, "func_id_type"))
+ goto cleanup;
+ t = btf__type_by_id(btf1, t->type);
+ if (!ASSERT_OK_PTR(t, "func_proto_id_type"))
+ goto cleanup;
+ if (!ASSERT_EQ(btf_is_func_proto(t), true, "is_func_proto"))
+ goto cleanup;
+ vlen = btf_vlen(t);
+
+ for (j = 0, p = btf_params(t); j < vlen; j++, p++) {
+ /* bpf_testmod uses resilient split BTF, so any
+ * reference types will be added to split BTF and their
+ * associated targets will be base BTF types; for example
+ * for a "struct sock *" the PTR will be in split BTF
+ * while the "struct sock" will be in base.
+ *
+ * In some cases like loff_t we have to resolve
+ * multiple typedefs hence the while() loop below.
+ *
+ * Note that resilient split BTF generation depends
+ * on pahole version, so we do not assert that
+ * reference types are in split BTF, as if pahole
+ * does not support resilient split BTF they will
+ * also be base BTF types.
+ */
+ id = p->type;
+ do {
+ t = btf__type_by_id(btf1, id);
+ if (!ASSERT_OK_PTR(t, "param_ref_type"))
+ goto cleanup;
+ if (!btf_is_mod(t) && !btf_is_ptr(t) && !btf_is_typedef(t))
+ break;
+ id = t->type;
+ } while (true);
+
+ if (!ASSERT_LT(id, nr_base_types, "verify_base_type"))
+ goto cleanup;
+ }
+ }
+cleanup:
+ btf__free(btf1);
+ btf__free(vmlinux_btf);
+}
+
+void test_btf_dedup_split()
+{
+ if (test__start_subtest("split_simple"))
+ test_split_simple();
+ if (test__start_subtest("split_struct_duped"))
+ test_split_struct_duped();
+ if (test__start_subtest("split_fwd_resolve"))
+ test_split_fwd_resolve();
+ if (test__start_subtest("split_dup_struct_in_cu"))
+ test_split_dup_struct_in_cu();
+ if (test__start_subtest("split_module"))
+ test_split_module();
+}
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