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bpf: Add unit tests for bpf_line_info 

Add unit tests for bpf_line_info for both BPF_PROG_LOAD and
BPF_OBJ_GET_INFO_BY_FD.

jit enabled:
[root@arch-fb-vm1 bpf]# ./test_btf -k 0
BTF prog info raw test[5] (line_info (No subprog)): OK
BTF prog info raw test[6] (line_info (No subprog. insn_off >= prog->len)): OK
BTF prog info raw test[7] (line_info (No subprog. zero tailing line_info): OK
BTF prog info raw test[8] (line_info (No subprog. nonzero tailing line_info)): OK
BTF prog info raw test[9] (line_info (subprog)): OK
BTF prog info raw test[10] (line_info (subprog + func_info)): OK
BTF prog info raw test[11] (line_info (subprog. missing 1st func line info)): OK
BTF prog info raw test[12] (line_info (subprog. missing 2nd func line info)): OK
BTF prog info raw test[13] (line_info (subprog. unordered insn offset)): OK

jit disabled:
BTF prog info raw test[5] (line_info (No subprog)): not jited. skipping jited_line_info check. OK
BTF prog info raw test[6] (line_info (No subprog. insn_off >= prog->len)): OK
BTF prog info raw test[7] (line_info (No subprog. zero tailing line_info): not jited. skipping jited_line_info check. OK
BTF prog info raw test[8] (line_info (No subprog. nonzero tailing line_info)): OK
BTF prog info raw test[9] (line_info (subprog)): not jited. skipping jited_line_info check. OK
BTF prog info raw test[10] (line_info (subprog + func_info)): not jited. skipping jited_line_info check. OK
BTF prog info raw test[11] (line_info (subprog. missing 1st func line info)): OK
BTF prog info raw test[12] (line_info (subprog. missing 2nd func line info)): OK
BTF prog info raw test[13] (line_info (subprog. unordered insn offset)): OK

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Martin KaFai Lau 2018-12-07 16:42:28 -08:00 committed by Alexei Starovoitov
parent 05687352c6
commit 4d6304c763
1 changed files with 580 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

597
tools/testing/selftests/bpf/test_btf.c
View File

@ -108,7 +108,7 @@ static int __base_pr(const char *format, ...)
#define BTF_END_RAW 0xdeadbeef
#define NAME_TBD 0xdeadb33f
#define MAX_NR_RAW_TYPES 1024
#define MAX_NR_RAW_U32 1024
#define BTF_LOG_BUF_SIZE 65535
static struct args {
@ -137,7 +137,7 @@ struct btf_raw_test {
const char *str_sec;
const char *map_name;
const char *err_str;
__u32 raw_types[MAX_NR_RAW_TYPES];
__u32 raw_types[MAX_NR_RAW_U32];
__u32 str_sec_size;
enum bpf_map_type map_type;
__u32 key_size;
@ -156,6 +156,9 @@ struct btf_raw_test {
int str_len_delta;
};
#define BTF_STR_SEC(str) \
.str_sec = str, .str_sec_size = sizeof(str)
static struct btf_raw_test raw_tests[] = {
/* enum E {
* E0,
@ -1858,11 +1861,11 @@ static const char *get_next_str(const char *start, const char *end)
return start < end - 1 ? start + 1 : NULL;
}
static int get_type_sec_size(const __u32 *raw_types)
static int get_raw_sec_size(const __u32 *raw_types)
{
int i;
for (i = MAX_NR_RAW_TYPES - 1;
for (i = MAX_NR_RAW_U32 - 1;
i >= 0 && raw_types[i] != BTF_END_RAW;
i--)
;
@ -1874,7 +1877,8 @@ static void *btf_raw_create(const struct btf_header *hdr,
const __u32 *raw_types,
const char *str,
unsigned int str_sec_size,
unsigned int *btf_size)
unsigned int *btf_size,
const char **ret_next_str)
{
const char *next_str = str, *end_str = str + str_sec_size;
unsigned int size_needed, offset;
@ -1883,7 +1887,7 @@ static void *btf_raw_create(const struct btf_header *hdr,
uint32_t *ret_types;
void *raw_btf;
type_sec_size = get_type_sec_size(raw_types);
type_sec_size = get_raw_sec_size(raw_types);
if (CHECK(type_sec_size < 0, "Cannot get nr_raw_types"))
return NULL;
@ -1922,6 +1926,8 @@ static void *btf_raw_create(const struct btf_header *hdr,
ret_hdr->str_len = str_sec_size;
*btf_size = size_needed;
if (ret_next_str)
*ret_next_str = next_str;
return raw_btf;
}
@ -1941,7 +1947,7 @@ static int do_test_raw(unsigned int test_num)
test->raw_types,
test->str_sec,
test->str_sec_size,
&raw_btf_size);
&raw_btf_size, NULL);
if (!raw_btf)
return -1;
@ -2018,7 +2024,7 @@ static int test_raw(void)
struct btf_get_info_test {
const char *descr;
const char *str_sec;
__u32 raw_types[MAX_NR_RAW_TYPES];
__u32 raw_types[MAX_NR_RAW_U32];
__u32 str_sec_size;
int btf_size_delta;
int (*special_test)(unsigned int test_num);
@ -2098,7 +2104,7 @@ static int test_big_btf_info(unsigned int test_num)
test->raw_types,
test->str_sec,
test->str_sec_size,
&raw_btf_size);
&raw_btf_size, NULL);
if (!raw_btf)
return -1;
@ -2182,7 +2188,7 @@ static int test_btf_id(unsigned int test_num)
test->raw_types,
test->str_sec,
test->str_sec_size,
&raw_btf_size);
&raw_btf_size, NULL);
if (!raw_btf)
return -1;
@ -2320,7 +2326,7 @@ static int do_test_get_info(unsigned int test_num)
test->raw_types,
test->str_sec,
test->str_sec_size,
&raw_btf_size);
&raw_btf_size, NULL);
if (!raw_btf)
return -1;
@ -2849,7 +2855,7 @@ static int do_test_pprint(void)
fprintf(stderr, "%s......", test->descr);
raw_btf = btf_raw_create(&hdr_tmpl, test->raw_types,
test->str_sec, test->str_sec_size,
&raw_btf_size);
&raw_btf_size, NULL);
if (!raw_btf)
return -1;
@ -3053,16 +3059,23 @@ static int test_pprint(void)
return err;
}
#define BPF_LINE_INFO_ENC(insn_off, file_off, line_off, line_num, line_col) \
(insn_off), (file_off), (line_off), ((line_num) << 10 | ((line_col) & 0x3ff))
static struct prog_info_raw_test {
const char *descr;
const char *str_sec;
__u32 raw_types[MAX_NR_RAW_TYPES];
const char *err_str;
__u32 raw_types[MAX_NR_RAW_U32];
__u32 str_sec_size;
struct bpf_insn insns[MAX_INSNS];
__u32 prog_type;
__u32 func_info[MAX_SUBPROGS][2];
__u32 func_info_rec_size;
__u32 func_info_cnt;
__u32 line_info[MAX_NR_RAW_U32];
__u32 line_info_rec_size;
__u32 nr_jited_ksyms;
bool expected_prog_load_failure;
} info_raw_tests[] = {
{
@ -3093,6 +3106,7 @@ static struct prog_info_raw_test {
.func_info = { {0, 5}, {3, 6} },
.func_info_rec_size = 8,
.func_info_cnt = 2,
.line_info = { BTF_END_RAW },
},
{
@ -3123,6 +3137,7 @@ static struct prog_info_raw_test {
.func_info = { {0, 5}, {3, 6} },
.func_info_rec_size = 4,
.func_info_cnt = 2,
.line_info = { BTF_END_RAW },
.expected_prog_load_failure = true,
},
@ -3154,6 +3169,7 @@ static struct prog_info_raw_test {
.func_info = { {0, 5}, {3, 6} },
.func_info_rec_size = 8,
.func_info_cnt = 1,
.line_info = { BTF_END_RAW },
.expected_prog_load_failure = true,
},
@ -3185,6 +3201,278 @@ static struct prog_info_raw_test {
.func_info = { {0, 5}, {2, 6} },
.func_info_rec_size = 8,
.func_info_cnt = 2,
.line_info = { BTF_END_RAW },
.expected_prog_load_failure = true,
},
{
.descr = "line_info (No subprog)",
.raw_types = {
BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4), /* [1] */
BTF_END_RAW,
},
BTF_STR_SEC("\0int\0int a=1;\0int b=2;\0return a + b;\0return a + b;"),
.insns = {
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_MOV64_IMM(BPF_REG_1, 2),
BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
.func_info_cnt = 0,
.line_info = {
BPF_LINE_INFO_ENC(0, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(1, 0, NAME_TBD, 2, 9),
BPF_LINE_INFO_ENC(2, 0, NAME_TBD, 3, 8),
BPF_LINE_INFO_ENC(3, 0, NAME_TBD, 4, 7),
BTF_END_RAW,
},
.line_info_rec_size = sizeof(struct bpf_line_info),
.nr_jited_ksyms = 1,
},
{
.descr = "line_info (No subprog. insn_off >= prog->len)",
.raw_types = {
BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4), /* [1] */
BTF_END_RAW,
},
BTF_STR_SEC("\0int\0int a=1;\0int b=2;\0return a + b;\0return a + b;"),
.insns = {
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_MOV64_IMM(BPF_REG_1, 2),
BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
.func_info_cnt = 0,
.line_info = {
BPF_LINE_INFO_ENC(0, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(1, 0, NAME_TBD, 2, 9),
BPF_LINE_INFO_ENC(2, 0, NAME_TBD, 3, 8),
BPF_LINE_INFO_ENC(3, 0, NAME_TBD, 4, 7),
BPF_LINE_INFO_ENC(4, 0, 0, 5, 6),
BTF_END_RAW,
},
.line_info_rec_size = sizeof(struct bpf_line_info),
.nr_jited_ksyms = 1,
.err_str = "line_info[4].insn_off",
.expected_prog_load_failure = true,
},
{
.descr = "line_info (No subprog. zero tailing line_info",
.raw_types = {
BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4), /* [1] */
BTF_END_RAW,
},
BTF_STR_SEC("\0int\0int a=1;\0int b=2;\0return a + b;\0return a + b;"),
.insns = {
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_MOV64_IMM(BPF_REG_1, 2),
BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
.func_info_cnt = 0,
.line_info = {
BPF_LINE_INFO_ENC(0, 0, NAME_TBD, 1, 10), 0,
BPF_LINE_INFO_ENC(1, 0, NAME_TBD, 2, 9), 0,
BPF_LINE_INFO_ENC(2, 0, NAME_TBD, 3, 8), 0,
BPF_LINE_INFO_ENC(3, 0, NAME_TBD, 4, 7), 0,
BTF_END_RAW,
},
.line_info_rec_size = sizeof(struct bpf_line_info) + sizeof(__u32),
.nr_jited_ksyms = 1,
},
{
.descr = "line_info (No subprog. nonzero tailing line_info)",
.raw_types = {
BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4), /* [1] */
BTF_END_RAW,
},
BTF_STR_SEC("\0int\0int a=1;\0int b=2;\0return a + b;\0return a + b;"),
.insns = {
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_MOV64_IMM(BPF_REG_1, 2),
BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
.func_info_cnt = 0,
.line_info = {
BPF_LINE_INFO_ENC(0, 0, NAME_TBD, 1, 10), 0,
BPF_LINE_INFO_ENC(1, 0, NAME_TBD, 2, 9), 0,
BPF_LINE_INFO_ENC(2, 0, NAME_TBD, 3, 8), 0,
BPF_LINE_INFO_ENC(3, 0, NAME_TBD, 4, 7), 1,
BTF_END_RAW,
},
.line_info_rec_size = sizeof(struct bpf_line_info) + sizeof(__u32),
.nr_jited_ksyms = 1,
.err_str = "nonzero tailing record in line_info",
.expected_prog_load_failure = true,
},
{
.descr = "line_info (subprog)",
.raw_types = {
BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4), /* [1] */
BTF_END_RAW,
},
BTF_STR_SEC("\0int\0int a=1+1;\0return func(a);\0b+=1;\0return b;"),
.insns = {
BPF_MOV64_IMM(BPF_REG_2, 1),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, 1),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_2),
BPF_CALL_REL(1),
BPF_EXIT_INSN(),
BPF_MOV64_REG(BPF_REG_0, BPF_REG_1),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 1),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
.func_info_cnt = 0,
.line_info = {
BPF_LINE_INFO_ENC(0, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(2, 0, NAME_TBD, 2, 9),
BPF_LINE_INFO_ENC(5, 0, NAME_TBD, 3, 8),
BPF_LINE_INFO_ENC(7, 0, NAME_TBD, 4, 7),
BTF_END_RAW,
},
.line_info_rec_size = sizeof(struct bpf_line_info),
.nr_jited_ksyms = 2,
},
{
.descr = "line_info (subprog + func_info)",
.raw_types = {
BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4), /* [1] */
BTF_FUNC_PROTO_ENC(1, 1), /* [2] */
BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1),
BTF_FUNC_ENC(NAME_TBD, 2), /* [3] */
BTF_FUNC_ENC(NAME_TBD, 2), /* [4] */
BTF_END_RAW,
},
BTF_STR_SEC("\0int\0x\0sub\0main\0int a=1+1;\0return func(a);\0b+=1;\0return b;"),
.insns = {
BPF_MOV64_IMM(BPF_REG_2, 1),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, 1),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_2),
BPF_CALL_REL(1),
BPF_EXIT_INSN(),
BPF_MOV64_REG(BPF_REG_0, BPF_REG_1),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 1),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
.func_info_cnt = 2,
.func_info_rec_size = 8,
.func_info = { {0, 4}, {5, 3} },
.line_info = {
BPF_LINE_INFO_ENC(0, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(2, 0, NAME_TBD, 2, 9),
BPF_LINE_INFO_ENC(5, 0, NAME_TBD, 3, 8),
BPF_LINE_INFO_ENC(7, 0, NAME_TBD, 4, 7),
BTF_END_RAW,
},
.line_info_rec_size = sizeof(struct bpf_line_info),
.nr_jited_ksyms = 2,
},
{
.descr = "line_info (subprog. missing 1st func line info)",
.raw_types = {
BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4), /* [1] */
BTF_END_RAW,
},
BTF_STR_SEC("\0int\0int a=1+1;\0return func(a);\0b+=1;\0return b;"),
.insns = {
BPF_MOV64_IMM(BPF_REG_2, 1),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, 1),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_2),
BPF_CALL_REL(1),
BPF_EXIT_INSN(),
BPF_MOV64_REG(BPF_REG_0, BPF_REG_1),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 1),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
.func_info_cnt = 0,
.line_info = {
BPF_LINE_INFO_ENC(1, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(2, 0, NAME_TBD, 2, 9),
BPF_LINE_INFO_ENC(5, 0, NAME_TBD, 3, 8),
BPF_LINE_INFO_ENC(7, 0, NAME_TBD, 4, 7),
BTF_END_RAW,
},
.line_info_rec_size = sizeof(struct bpf_line_info),
.nr_jited_ksyms = 2,
.err_str = "missing bpf_line_info for func#0",
.expected_prog_load_failure = true,
},
{
.descr = "line_info (subprog. missing 2nd func line info)",
.raw_types = {
BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4), /* [1] */
BTF_END_RAW,
},
BTF_STR_SEC("\0int\0int a=1+1;\0return func(a);\0b+=1;\0return b;"),
.insns = {
BPF_MOV64_IMM(BPF_REG_2, 1),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, 1),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_2),
BPF_CALL_REL(1),
BPF_EXIT_INSN(),
BPF_MOV64_REG(BPF_REG_0, BPF_REG_1),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 1),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
.func_info_cnt = 0,
.line_info = {
BPF_LINE_INFO_ENC(0, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(2, 0, NAME_TBD, 2, 9),
BPF_LINE_INFO_ENC(6, 0, NAME_TBD, 3, 8),
BPF_LINE_INFO_ENC(7, 0, NAME_TBD, 4, 7),
BTF_END_RAW,
},
.line_info_rec_size = sizeof(struct bpf_line_info),
.nr_jited_ksyms = 2,
.err_str = "missing bpf_line_info for func#1",
.expected_prog_load_failure = true,
},
{
.descr = "line_info (subprog. unordered insn offset)",
.raw_types = {
BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4), /* [1] */
BTF_END_RAW,
},
BTF_STR_SEC("\0int\0int a=1+1;\0return func(a);\0b+=1;\0return b;"),
.insns = {
BPF_MOV64_IMM(BPF_REG_2, 1),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, 1),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_2),
BPF_CALL_REL(1),
BPF_EXIT_INSN(),
BPF_MOV64_REG(BPF_REG_0, BPF_REG_1),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 1),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
.func_info_cnt = 0,
.line_info = {
BPF_LINE_INFO_ENC(0, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(5, 0, NAME_TBD, 2, 9),
BPF_LINE_INFO_ENC(2, 0, NAME_TBD, 3, 8),
BPF_LINE_INFO_ENC(7, 0, NAME_TBD, 4, 7),
BTF_END_RAW,
},
.line_info_rec_size = sizeof(struct bpf_line_info),
.nr_jited_ksyms = 2,
.err_str = "Invalid line_info[2].insn_off",
.expected_prog_load_failure = true,
},
@ -3200,6 +3488,46 @@ static size_t probe_prog_length(const struct bpf_insn *fp)
return len + 1;
}
static __u32 *patch_name_tbd(const __u32 *raw_u32,
const char *str, __u32 str_off,
unsigned int str_sec_size,
unsigned int *ret_size)
{
int i, raw_u32_size = get_raw_sec_size(raw_u32);
const char *end_str = str + str_sec_size;
const char *next_str = str + str_off;
__u32 *new_u32 = NULL;
if (raw_u32_size == -1)
return ERR_PTR(-EINVAL);
if (!raw_u32_size) {
*ret_size = 0;
return NULL;
}
new_u32 = malloc(raw_u32_size);
if (!new_u32)
return ERR_PTR(-ENOMEM);
for (i = 0; i < raw_u32_size / sizeof(raw_u32[0]); i++) {
if (raw_u32[i] == NAME_TBD) {
next_str = get_next_str(next_str, end_str);
if (CHECK(!next_str, "Error in getting next_str\n")) {
free(new_u32);
return ERR_PTR(-EINVAL);
}
new_u32[i] = next_str - str;
next_str += strlen(next_str);
} else {
new_u32[i] = raw_u32[i];
}
}
*ret_size = raw_u32_size;
return new_u32;
}
static int test_get_finfo(const struct prog_info_raw_test *test,
int prog_fd)
{
@ -3283,18 +3611,229 @@ done:
return err;
}
static int test_get_linfo(const struct prog_info_raw_test *test,
const void *patched_linfo,
__u32 cnt, int prog_fd)
{
__u32 i, info_len, nr_jited_ksyms, nr_jited_func_lens;
__u64 *jited_linfo = NULL, *jited_ksyms = NULL;
__u32 rec_size, jited_rec_size, jited_cnt;
struct bpf_line_info *linfo = NULL;
__u32 cur_func_len, ksyms_found;
struct bpf_prog_info info = {};
__u32 *jited_func_lens = NULL;
__u64 cur_func_ksyms;
int err;
jited_cnt = cnt;
rec_size = sizeof(*linfo);
jited_rec_size = sizeof(*jited_linfo);
if (test->nr_jited_ksyms)
nr_jited_ksyms = test->nr_jited_ksyms;
else
nr_jited_ksyms = test->func_info_cnt;
nr_jited_func_lens = nr_jited_ksyms;
info_len = sizeof(struct bpf_prog_info);
err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len);
if (CHECK(err == -1, "err:%d errno:%d", err, errno)) {
err = -1;
goto done;
}
if (!info.jited_prog_len) {
/* prog is not jited */
jited_cnt = 0;
nr_jited_ksyms = 1;
nr_jited_func_lens = 1;
}
if (CHECK(info.line_info_cnt != cnt ||
info.jited_line_info_cnt != jited_cnt ||
info.nr_jited_ksyms != nr_jited_ksyms ||
info.nr_jited_func_lens != nr_jited_func_lens ||
(!info.line_info_cnt && info.jited_line_info_cnt),
"info: line_info_cnt:%u(expected:%u) jited_line_info_cnt:%u(expected:%u) nr_jited_ksyms:%u(expected:%u) nr_jited_func_lens:%u(expected:%u)",
info.line_info_cnt, cnt,
info.jited_line_info_cnt, jited_cnt,
info.nr_jited_ksyms, nr_jited_ksyms,
info.nr_jited_func_lens, nr_jited_func_lens)) {
err = -1;
goto done;
}
if (CHECK(info.line_info_rec_size < 16 ||
info.jited_line_info_rec_size < 8,
"info: line_info_rec_size:%u(userspace expected:%u) jited_line_info_rec_size:%u(userspace expected:%u)",
info.line_info_rec_size, rec_size,
info.jited_line_info_rec_size, jited_rec_size)) {
err = -1;
goto done;
}
if (!cnt)
return 0;
rec_size = info.line_info_rec_size;
jited_rec_size = info.jited_line_info_rec_size;
memset(&info, 0, sizeof(info));
linfo = calloc(cnt, rec_size);
if (CHECK(!linfo, "!linfo")) {
err = -1;
goto done;
}
info.line_info_cnt = cnt;
info.line_info_rec_size = rec_size;
info.line_info = ptr_to_u64(linfo);
if (jited_cnt) {
jited_linfo = calloc(jited_cnt, jited_rec_size);
jited_ksyms = calloc(nr_jited_ksyms, sizeof(*jited_ksyms));
jited_func_lens = calloc(nr_jited_func_lens,
sizeof(*jited_func_lens));
if (CHECK(!jited_linfo || !jited_ksyms || !jited_func_lens,
"jited_linfo:%p jited_ksyms:%p jited_func_lens:%p",
jited_linfo, jited_ksyms, jited_func_lens)) {
err = -1;
goto done;
}
info.jited_line_info_cnt = jited_cnt;
info.jited_line_info_rec_size = jited_rec_size;
info.jited_line_info = ptr_to_u64(jited_linfo);
info.nr_jited_ksyms = nr_jited_ksyms;
info.jited_ksyms = ptr_to_u64(jited_ksyms);
info.nr_jited_func_lens = nr_jited_func_lens;
info.jited_func_lens = ptr_to_u64(jited_func_lens);
}
err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len);
/*
* Only recheck the info.*line_info* fields.
* Other fields are not the concern of this test.
*/
if (CHECK(err == -1 ||
!info.line_info ||
info.line_info_cnt != cnt ||
(jited_cnt && !info.jited_line_info) ||
info.jited_line_info_cnt != jited_cnt ||
info.line_info_rec_size != rec_size ||
info.jited_line_info_rec_size != jited_rec_size,
"err:%d errno:%d info: line_info_cnt:%u(expected:%u) jited_line_info_cnt:%u(expected:%u) line_info_rec_size:%u(expected:%u) jited_linfo_rec_size:%u(expected:%u) line_info:%p jited_line_info:%p",
err, errno,
info.line_info_cnt, cnt,
info.jited_line_info_cnt, jited_cnt,
info.line_info_rec_size, rec_size,
info.jited_line_info_rec_size, jited_rec_size,
(void *)(long)info.line_info,
(void *)(long)info.jited_line_info)) {
err = -1;
goto done;
}
CHECK(linfo[0].insn_off, "linfo[0].insn_off:%u",
linfo[0].insn_off);
for (i = 1; i < cnt; i++) {
const struct bpf_line_info *expected_linfo;
expected_linfo = patched_linfo + (i * test->line_info_rec_size);
if (CHECK(linfo[i].insn_off <= linfo[i - 1].insn_off,
"linfo[%u].insn_off:%u <= linfo[%u].insn_off:%u",
i, linfo[i].insn_off,
i - 1, linfo[i - 1].insn_off)) {
err = -1;
goto done;
}
if (CHECK(linfo[i].file_name_off != expected_linfo->file_name_off ||
linfo[i].line_off != expected_linfo->line_off ||
linfo[i].line_col != expected_linfo->line_col,
"linfo[%u] (%u, %u, %u) != (%u, %u, %u)", i,
linfo[i].file_name_off,
linfo[i].line_off,
linfo[i].line_col,
expected_linfo->file_name_off,
expected_linfo->line_off,
expected_linfo->line_col)) {
err = -1;
goto done;
}
}
if (!jited_cnt) {
fprintf(stderr, "not jited. skipping jited_line_info check. ");
err = 0;
goto done;
}
if (CHECK(jited_linfo[0] != jited_ksyms[0],
"jited_linfo[0]:%lx != jited_ksyms[0]:%lx",
(long)(jited_linfo[0]), (long)(jited_ksyms[0]))) {
err = -1;
goto done;
}
ksyms_found = 1;
cur_func_len = jited_func_lens[0];
cur_func_ksyms = jited_ksyms[0];
for (i = 1; i < jited_cnt; i++) {
if (ksyms_found < nr_jited_ksyms &&
jited_linfo[i] == jited_ksyms[ksyms_found]) {
cur_func_ksyms = jited_ksyms[ksyms_found];
cur_func_len = jited_ksyms[ksyms_found];
ksyms_found++;
continue;
}
if (CHECK(jited_linfo[i] <= jited_linfo[i - 1],
"jited_linfo[%u]:%lx <= jited_linfo[%u]:%lx",
i, (long)jited_linfo[i],
i - 1, (long)(jited_linfo[i - 1]))) {
err = -1;
goto done;
}
if (CHECK(jited_linfo[i] - cur_func_ksyms > cur_func_len,
"jited_linfo[%u]:%lx - %lx > %u",
i, (long)jited_linfo[i], (long)cur_func_ksyms,
cur_func_len)) {
err = -1;
goto done;
}
}
if (CHECK(ksyms_found != nr_jited_ksyms,
"ksyms_found:%u != nr_jited_ksyms:%u",
ksyms_found, nr_jited_ksyms)) {
err = -1;
goto done;
}
err = 0;
done:
free(linfo);
free(jited_linfo);
free(jited_ksyms);
free(jited_func_lens);
return err;
}
static int do_test_info_raw(unsigned int test_num)
{
const struct prog_info_raw_test *test = &info_raw_tests[test_num - 1];
unsigned int raw_btf_size, linfo_str_off, linfo_size;
int btf_fd = -1, prog_fd = -1, err = 0;
unsigned int raw_btf_size;
void *raw_btf, *patched_linfo = NULL;
const char *ret_next_str;
union bpf_attr attr = {};
void *raw_btf;
fprintf(stderr, "BTF prog info raw test[%u] (%s): ", test_num, test->descr);
raw_btf = btf_raw_create(&hdr_tmpl, test->raw_types,
test->str_sec, test->str_sec_size,
&raw_btf_size);
&raw_btf_size, &ret_next_str);
if (!raw_btf)
return -1;
@ -3314,6 +3853,16 @@ static int do_test_info_raw(unsigned int test_num)
fprintf(stderr, "\n%s", btf_log_buf);
*btf_log_buf = '\0';
linfo_str_off = ret_next_str - test->str_sec;
patched_linfo = patch_name_tbd(test->line_info,
test->str_sec, linfo_str_off,
test->str_sec_size, &linfo_size);
if (IS_ERR(patched_linfo)) {
fprintf(stderr, "error in creating raw bpf_line_info");
err = -1;
goto done;
}
attr.prog_type = test->prog_type;
attr.insns = ptr_to_u64(test->insns);
attr.insn_cnt = probe_prog_length(test->insns);
@ -3325,11 +3874,18 @@ static int do_test_info_raw(unsigned int test_num)
attr.log_buf = ptr_to_u64(btf_log_buf);
attr.log_size = BTF_LOG_BUF_SIZE;
attr.log_level = 1;
if (linfo_size) {
attr.line_info_rec_size = test->line_info_rec_size;
attr.line_info = ptr_to_u64(patched_linfo);
attr.line_info_cnt = linfo_size / attr.line_info_rec_size;
}
prog_fd = syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
err = ((prog_fd == -1) != test->expected_prog_load_failure);
if (CHECK(err, "prog_fd:%d expected_prog_load_failure:%u errno:%d",
prog_fd, test->expected_prog_load_failure, errno)) {
prog_fd, test->expected_prog_load_failure, errno) ||
CHECK(test->err_str && !strstr(btf_log_buf, test->err_str),
"expected err_str:%s", test->err_str)) {
err = -1;
goto done;
}
@ -3341,6 +3897,10 @@ static int do_test_info_raw(unsigned int test_num)
if (err)
goto done;
err = test_get_linfo(test, patched_linfo, attr.line_info_cnt, prog_fd);
if (err)
goto done;
done:
if (!err)
fprintf(stderr, "OK");
@ -3353,6 +3913,9 @@ done:
if (prog_fd != -1)
close(prog_fd);
if (!IS_ERR(patched_linfo))
free(patched_linfo);
return err;
}