Skip to content

K
Kernel

openeuler / Kernel
1 年多 前同步成功

通知 8
Star 0
Fork 0
K
Kernel
提交 cb050775 编写于 作者: J Jakub Kicinski 提交者： Alexei Starovoitov
浏览文件
操作

selftests: bpf: add tests for dead code removal 

Add tests for newly added dead code elimination.  Both verifier
and BTF tests are added.  BTF test infrastructure has to be
extended to be able to account for line info which is eliminated
during dead code removal.
Signed-off-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: NYonghong Song <yhs@fb.com>
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
上级 a1b14abc
隐藏空白更改
内联 并排
Showing with 549 addition and 7 deletion
tools/testing/selftests/bpf/test_btf.c
浏览文件 @ cb050775
......@@ -4293,6 +4293,10 @@ static struct prog_info_raw_test {
__u32 line_info_rec_size;
__u32 nr_jited_ksyms;
bool expected_prog_load_failure;
__u32 dead_code_cnt;
__u32 dead_code_mask;
__u32 dead_func_cnt;
__u32 dead_func_mask;
} info_raw_tests[] = {
{
.descr = "func_type (main func + one sub)",
......@@ -4719,6 +4723,369 @@ static struct prog_info_raw_test {
.expected_prog_load_failure = true,
},
{
.descr = "line_info (dead start)",
.raw_types = {
BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4), /* [1] */
BTF_END_RAW,
},
BTF_STR_SEC("\0int\0/* dead jmp */\0int a=1;\0int b=2;\0return a + b;\0return a + b;"),
.insns = {
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
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, NAME_TBD, 5, 6),
BTF_END_RAW,
},
.line_info_rec_size = sizeof(struct bpf_line_info),
.nr_jited_ksyms = 1,
.dead_code_cnt = 1,
.dead_code_mask = 0x01,
},
{
.descr = "line_info (dead end)",
.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;\0/* dead jmp */\0return a + b;\0/* dead exit */"),
.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_JMP_IMM(BPF_JGE, BPF_REG_0, 10, 1),
BPF_EXIT_INSN(),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
.func_info_cnt = 0,
.line_info = {
BPF_LINE_INFO_ENC(0, 0, NAME_TBD, 1, 12),
BPF_LINE_INFO_ENC(1, 0, NAME_TBD, 2, 11),
BPF_LINE_INFO_ENC(2, 0, NAME_TBD, 3, 10),
BPF_LINE_INFO_ENC(3, 0, NAME_TBD, 4, 9),
BPF_LINE_INFO_ENC(4, 0, NAME_TBD, 5, 8),
BPF_LINE_INFO_ENC(5, 0, NAME_TBD, 6, 7),
BTF_END_RAW,
},
.line_info_rec_size = sizeof(struct bpf_line_info),
.nr_jited_ksyms = 1,
.dead_code_cnt = 2,
.dead_code_mask = 0x28,
},
{
.descr = "line_info (dead code + 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;\0/* dead jmp */"
"\0/* dead */\0/* dead */\0/* dead */\0/* dead */"
"\0/* dead */\0/* dead */\0/* dead */\0/* dead */"
"\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_JMP_IMM(BPF_JGE, BPF_REG_2, 0, 8),
BPF_MOV64_IMM(BPF_REG_2, 1),
BPF_MOV64_IMM(BPF_REG_2, 1),
BPF_MOV64_IMM(BPF_REG_2, 1),
BPF_MOV64_IMM(BPF_REG_2, 1),
BPF_MOV64_IMM(BPF_REG_2, 1),
BPF_MOV64_IMM(BPF_REG_2, 1),
BPF_MOV64_IMM(BPF_REG_2, 1),
BPF_MOV64_IMM(BPF_REG_2, 1),
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}, {14, 3} },
.line_info = {
BPF_LINE_INFO_ENC(0, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(3, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(4, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(5, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(6, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(7, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(8, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(9, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(10, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(11, 0, NAME_TBD, 2, 9),
BPF_LINE_INFO_ENC(12, 0, NAME_TBD, 2, 9),
BPF_LINE_INFO_ENC(14, 0, NAME_TBD, 3, 8),
BPF_LINE_INFO_ENC(16, 0, NAME_TBD, 4, 7),
BTF_END_RAW,
},
.line_info_rec_size = sizeof(struct bpf_line_info),
.nr_jited_ksyms = 2,
.dead_code_cnt = 9,
.dead_code_mask = 0x3fe,
},
{
.descr = "line_info (dead subprog)",
.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_FUNC_ENC(NAME_TBD, 2), /* [5] */
BTF_END_RAW,
},
BTF_STR_SEC("\0int\0x\0dead\0main\0func\0int a=1+1;\0/* live call */"
"\0return 0;\0return 0;\0/* dead */\0/* dead */"
"\0/* dead */\0return bla + 1;\0return bla + 1;"
"\0return bla + 1;\0return func(a);\0b+=1;\0return b;"),
.insns = {
BPF_MOV64_IMM(BPF_REG_2, 1),
BPF_JMP_IMM(BPF_JGE, BPF_REG_2, 0, 1),
BPF_CALL_REL(3),
BPF_CALL_REL(5),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_CALL_REL(1),
BPF_EXIT_INSN(),
BPF_MOV64_REG(BPF_REG_0, 2),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 1),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
.func_info_cnt = 3,
.func_info_rec_size = 8,
.func_info = { {0, 4}, {6, 3}, {9, 5} },
.line_info = {
BPF_LINE_INFO_ENC(0, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(3, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(4, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(5, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(6, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(7, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(8, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(9, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(10, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(11, 0, NAME_TBD, 2, 9),
BTF_END_RAW,
},
.line_info_rec_size = sizeof(struct bpf_line_info),
.nr_jited_ksyms = 2,
.dead_code_cnt = 3,
.dead_code_mask = 0x70,
.dead_func_cnt = 1,
.dead_func_mask = 0x2,
},
{
.descr = "line_info (dead last subprog)",
.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), /* [5] */
BTF_END_RAW,
},
BTF_STR_SEC("\0int\0x\0dead\0main\0int a=1+1;\0/* live call */"
"\0return 0;\0/* dead */\0/* dead */"),
.insns = {
BPF_MOV64_IMM(BPF_REG_2, 1),
BPF_JMP_IMM(BPF_JGE, BPF_REG_2, 0, 1),
BPF_CALL_REL(2),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
BPF_MOV64_IMM(BPF_REG_0, 0),
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(3, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(4, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(5, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(6, 0, NAME_TBD, 1, 10),
BTF_END_RAW,
},
.line_info_rec_size = sizeof(struct bpf_line_info),
.nr_jited_ksyms = 1,
.dead_code_cnt = 2,
.dead_code_mask = 0x18,
.dead_func_cnt = 1,
.dead_func_mask = 0x2,
},
{
.descr = "line_info (dead subprog + dead start)",
.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_FUNC_ENC(NAME_TBD, 2), /* [5] */
BTF_END_RAW,
},
BTF_STR_SEC("\0int\0x\0dead\0main\0func\0int a=1+1;\0/* dead */"
"\0return 0;\0return 0;\0return 0;"
"\0/* dead */\0/* dead */\0/* dead */\0/* dead */"
"\0return b + 1;\0return b + 1;\0return b + 1;"),
.insns = {
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_MOV64_IMM(BPF_REG_2, 1),
BPF_JMP_IMM(BPF_JGE, BPF_REG_2, 0, 1),
BPF_CALL_REL(3),
BPF_CALL_REL(5),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_CALL_REL(1),
BPF_EXIT_INSN(),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_MOV64_REG(BPF_REG_0, 2),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 1),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
.func_info_cnt = 3,
.func_info_rec_size = 8,
.func_info = { {0, 4}, {7, 3}, {10, 5} },
.line_info = {
BPF_LINE_INFO_ENC(0, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(3, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(4, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(5, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(6, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(7, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(8, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(9, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(10, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(11, 0, NAME_TBD, 2, 9),
BPF_LINE_INFO_ENC(12, 0, NAME_TBD, 2, 9),
BPF_LINE_INFO_ENC(13, 0, NAME_TBD, 2, 9),
BTF_END_RAW,
},
.line_info_rec_size = sizeof(struct bpf_line_info),
.nr_jited_ksyms = 2,
.dead_code_cnt = 5,
.dead_code_mask = 0x1e2,
.dead_func_cnt = 1,
.dead_func_mask = 0x2,
},
{
.descr = "line_info (dead subprog + dead start w/ move)",
.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_FUNC_ENC(NAME_TBD, 2), /* [5] */
BTF_END_RAW,
},
BTF_STR_SEC("\0int\0x\0dead\0main\0func\0int a=1+1;\0/* live call */"
"\0return 0;\0return 0;\0/* dead */\0/* dead */"
"\0/* dead */\0return bla + 1;\0return bla + 1;"
"\0return bla + 1;\0return func(a);\0b+=1;\0return b;"),
.insns = {
BPF_MOV64_IMM(BPF_REG_2, 1),
BPF_JMP_IMM(BPF_JGE, BPF_REG_2, 0, 1),
BPF_CALL_REL(3),
BPF_CALL_REL(5),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_CALL_REL(1),
BPF_EXIT_INSN(),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_MOV64_REG(BPF_REG_0, 2),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 1),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
.func_info_cnt = 3,
.func_info_rec_size = 8,
.func_info = { {0, 4}, {6, 3}, {9, 5} },
.line_info = {
BPF_LINE_INFO_ENC(0, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(3, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(4, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(5, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(6, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(7, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(8, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(9, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(11, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(12, 0, NAME_TBD, 2, 9),
BTF_END_RAW,
},
.line_info_rec_size = sizeof(struct bpf_line_info),
.nr_jited_ksyms = 2,
.dead_code_cnt = 3,
.dead_code_mask = 0x70,
.dead_func_cnt = 1,
.dead_func_mask = 0x2,
},
{
.descr = "line_info (dead end + subprog start w/ no linfo)",
.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\0main\0func\0/* main linfo */\0/* func linfo */"),
.insns = {
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_JMP_IMM(BPF_JGE, BPF_REG_0, 1, 3),
BPF_CALL_REL(3),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
BPF_EXIT_INSN(),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
.func_info_cnt = 2,
.func_info_rec_size = 8,
.func_info = { {0, 3}, {6, 4}, },
.line_info = {
BPF_LINE_INFO_ENC(0, 0, NAME_TBD, 1, 10),
BPF_LINE_INFO_ENC(6, 0, NAME_TBD, 1, 10),
BTF_END_RAW,
},
.line_info_rec_size = sizeof(struct bpf_line_info),
.nr_jited_ksyms = 2,
},
};
static size_t probe_prog_length(const struct bpf_insn *fp)
......@@ -4778,6 +5145,7 @@ static int test_get_finfo(const struct prog_info_raw_test *test,
struct bpf_func_info *finfo;
__u32 info_len, rec_size, i;
void *func_info = NULL;
__u32 nr_func_info;
int err;
/* get necessary lens */
......@@ -4787,7 +5155,8 @@ static int test_get_finfo(const struct prog_info_raw_test *test,
fprintf(stderr, "%s\n", btf_log_buf);
return -1;
}
if (CHECK(info.nr_func_info != test->func_info_cnt,
nr_func_info = test->func_info_cnt - test->dead_func_cnt;
if (CHECK(info.nr_func_info != nr_func_info,
"incorrect info.nr_func_info (1st) %d",
info.nr_func_info)) {
return -1;
......@@ -4808,7 +5177,7 @@ static int test_get_finfo(const struct prog_info_raw_test *test,
/* reset info to only retrieve func_info related data */
memset(&info, 0, sizeof(info));
info.nr_func_info = test->func_info_cnt;
info.nr_func_info = nr_func_info;
info.func_info_rec_size = rec_size;
info.func_info = ptr_to_u64(func_info);
err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len);
......@@ -4817,7 +5186,7 @@ static int test_get_finfo(const struct prog_info_raw_test *test,
err = -1;
goto done;
}
if (CHECK(info.nr_func_info != test->func_info_cnt,
if (CHECK(info.nr_func_info != nr_func_info,
"incorrect info.nr_func_info (2nd) %d",
info.nr_func_info)) {
err = -1;
......@@ -4831,7 +5200,9 @@ static int test_get_finfo(const struct prog_info_raw_test *test,
}
finfo = func_info;
for (i = 0; i < test->func_info_cnt; i++) {
for (i = 0; i < nr_func_info; i++) {
if (test->dead_func_mask & (1 << i))
continue;
if (CHECK(finfo->type_id != test->func_info[i][1],
"incorrect func_type %u expected %u",
finfo->type_id, test->func_info[i][1])) {
......@@ -4860,6 +5231,7 @@ static int test_get_linfo(const struct prog_info_raw_test *test,
struct bpf_prog_info info = {};
__u32 *jited_func_lens = NULL;
__u64 cur_func_ksyms;
__u32 dead_insns;
int err;
jited_cnt = cnt;
......@@ -4868,7 +5240,7 @@ static int test_get_linfo(const struct prog_info_raw_test *test,
if (test->nr_jited_ksyms)
nr_jited_ksyms = test->nr_jited_ksyms;
else
nr_jited_ksyms = test->func_info_cnt;
nr_jited_ksyms = test->func_info_cnt - test->dead_func_cnt;
nr_jited_func_lens = nr_jited_ksyms;
info_len = sizeof(struct bpf_prog_info);
......@@ -4970,12 +5342,20 @@ static int test_get_linfo(const struct prog_info_raw_test *test,
goto done;
}
dead_insns = 0;
while (test->dead_code_mask & (1 << dead_insns))
dead_insns++;
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);
while (test->dead_code_mask & (1 << (i + dead_insns)))
dead_insns++;
expected_linfo = patched_linfo +
((i + dead_insns) * 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,
......@@ -5133,7 +5513,9 @@ 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);
err = test_get_linfo(test, patched_linfo,
attr.line_info_cnt - test->dead_code_cnt,
prog_fd);
if (err)
goto done;
......
tools/testing/selftests/bpf/test_verifier.c
浏览文件 @ cb050775
......@@ -15599,6 +15599,166 @@ static struct bpf_test tests[] = {
.result_unpriv = ACCEPT,
.result = ACCEPT,
},
{
"dead code: start",
.insns = {
BPF_JMP_IMM(BPF_JA, 0, 0, 2),
BPF_LDX_MEM(BPF_B, BPF_REG_8, BPF_REG_9, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, 2),
BPF_MOV64_IMM(BPF_REG_0, 7),
BPF_JMP_IMM(BPF_JGE, BPF_REG_0, 10, -4),
BPF_EXIT_INSN(),
},
.result = ACCEPT,
.retval = 7,
},
{
"dead code: mid 1",
.insns = {
BPF_MOV64_IMM(BPF_REG_0, 7),
BPF_JMP_IMM(BPF_JGE, BPF_REG_0, 0, 1),
BPF_JMP_IMM(BPF_JGE, BPF_REG_0, 10, 0),
BPF_EXIT_INSN(),
},
.result = ACCEPT,
.retval = 7,
},
{
"dead code: mid 2",
.insns = {
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
BPF_FUNC_get_prandom_u32),
BPF_JMP_IMM(BPF_JSET, BPF_REG_0, 1, 4),
BPF_JMP_IMM(BPF_JSET, BPF_REG_0, 1, 1),
BPF_JMP_IMM(BPF_JA, 0, 0, 2),
BPF_MOV64_IMM(BPF_REG_0, 7),
BPF_EXIT_INSN(),
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_EXIT_INSN(),
},
.result = ACCEPT,
.retval = 1,
},
{
"dead code: end 1",
.insns = {
BPF_MOV64_IMM(BPF_REG_0, 7),
BPF_JMP_IMM(BPF_JGE, BPF_REG_0, 10, 1),
BPF_EXIT_INSN(),
BPF_EXIT_INSN(),
},
.result = ACCEPT,
.retval = 7,
},
{
"dead code: end 2",
.insns = {
BPF_MOV64_IMM(BPF_REG_0, 7),
BPF_JMP_IMM(BPF_JGE, BPF_REG_0, 10, 1),
BPF_EXIT_INSN(),
BPF_MOV64_IMM(BPF_REG_0, 12),
BPF_EXIT_INSN(),
},
.result = ACCEPT,
.retval = 7,
},
{
"dead code: end 3",
.insns = {
BPF_MOV64_IMM(BPF_REG_0, 7),
BPF_JMP_IMM(BPF_JGE, BPF_REG_0, 8, 1),
BPF_EXIT_INSN(),
BPF_JMP_IMM(BPF_JGE, BPF_REG_0, 10, 1),
BPF_JMP_IMM(BPF_JA, 0, 0, 1),
BPF_MOV64_IMM(BPF_REG_0, 12),
BPF_JMP_IMM(BPF_JA, 0, 0, -5),
},
.result = ACCEPT,
.retval = 7,
},
{
"dead code: tail of main + func",
.insns = {
BPF_MOV64_IMM(BPF_REG_0, 7),
BPF_JMP_IMM(BPF_JGE, BPF_REG_0, 8, 1),
BPF_EXIT_INSN(),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
BPF_EXIT_INSN(),
BPF_MOV64_IMM(BPF_REG_0, 12),
BPF_EXIT_INSN(),
},
.errstr_unpriv = "function calls to other bpf functions are allowed for root only",
.result_unpriv = REJECT,
.result = ACCEPT,
.retval = 7,
},
{
"dead code: tail of main + two functions",
.insns = {
BPF_MOV64_IMM(BPF_REG_0, 7),
BPF_JMP_IMM(BPF_JGE, BPF_REG_0, 8, 1),
BPF_EXIT_INSN(),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
BPF_EXIT_INSN(),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
BPF_EXIT_INSN(),
BPF_MOV64_IMM(BPF_REG_0, 12),
BPF_EXIT_INSN(),
},
.errstr_unpriv = "function calls to other bpf functions are allowed for root only",
.result_unpriv = REJECT,
.result = ACCEPT,
.retval = 7,
},
{
"dead code: function in the middle and mid of another func",
.insns = {
BPF_MOV64_IMM(BPF_REG_1, 7),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 3),
BPF_EXIT_INSN(),
BPF_MOV64_IMM(BPF_REG_0, 12),
BPF_EXIT_INSN(),
BPF_MOV64_IMM(BPF_REG_0, 7),
BPF_JMP_IMM(BPF_JGE, BPF_REG_1, 7, 1),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, -5),
BPF_EXIT_INSN(),
},
.errstr_unpriv = "function calls to other bpf functions are allowed for root only",
.result_unpriv = REJECT,
.result = ACCEPT,
.retval = 7,
},
{
"dead code: middle of main before call",
.insns = {
BPF_MOV64_IMM(BPF_REG_1, 2),
BPF_JMP_IMM(BPF_JGE, BPF_REG_1, 2, 1),
BPF_MOV64_IMM(BPF_REG_1, 5),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
BPF_EXIT_INSN(),
BPF_MOV64_REG(BPF_REG_0, BPF_REG_1),
BPF_EXIT_INSN(),
},
.errstr_unpriv = "function calls to other bpf functions are allowed for root only",
.result_unpriv = REJECT,
.result = ACCEPT,
.retval = 2,
},
{
"dead code: start of a function",
.insns = {
BPF_MOV64_IMM(BPF_REG_1, 2),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
BPF_EXIT_INSN(),
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
BPF_MOV64_REG(BPF_REG_0, BPF_REG_1),
BPF_EXIT_INSN(),
},
.errstr_unpriv = "function calls to other bpf functions are allowed for root only",
.result_unpriv = REJECT,
.result = ACCEPT,
.retval = 2,
},
};
static int probe_filter_length(const struct bpf_insn *fp)
......
Markdown is supported
0% 或 .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑！
想要评论请 注册 或