360301a6c2
test_global_func[12] - check 512 stack limit.
test_global_func[34] - check 8 frame call chain limit.
test_global_func5 - check that non-ctx pointer cannot be passed into
a function that expects context.
test_global_func6 - check that ctx pointer is unmodified.
test_global_func7 - check that global function returns scalar.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20200110064124.1760511-7-ast@kernel.org
82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2020 Facebook */
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#include <test_progs.h>
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const char *err_str;
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bool found;
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static int libbpf_debug_print(enum libbpf_print_level level,
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const char *format, va_list args)
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{
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char *log_buf;
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if (level != LIBBPF_WARN ||
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strcmp(format, "libbpf: \n%s\n")) {
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vprintf(format, args);
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return 0;
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}
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log_buf = va_arg(args, char *);
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if (!log_buf)
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goto out;
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if (strstr(log_buf, err_str) == 0)
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found = true;
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out:
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printf(format, log_buf);
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return 0;
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}
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extern int extra_prog_load_log_flags;
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static int check_load(const char *file)
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{
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struct bpf_prog_load_attr attr;
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struct bpf_object *obj = NULL;
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int err, prog_fd;
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memset(&attr, 0, sizeof(struct bpf_prog_load_attr));
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attr.file = file;
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attr.prog_type = BPF_PROG_TYPE_UNSPEC;
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attr.log_level = extra_prog_load_log_flags;
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attr.prog_flags = BPF_F_TEST_RND_HI32;
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found = false;
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err = bpf_prog_load_xattr(&attr, &obj, &prog_fd);
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bpf_object__close(obj);
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return err;
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}
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struct test_def {
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const char *file;
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const char *err_str;
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};
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void test_test_global_funcs(void)
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{
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struct test_def tests[] = {
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{ "test_global_func1.o", "combined stack size of 4 calls is 544" },
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{ "test_global_func2.o" },
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{ "test_global_func3.o" , "the call stack of 8 frames" },
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{ "test_global_func4.o" },
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{ "test_global_func5.o" , "expected pointer to ctx, but got PTR" },
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{ "test_global_func6.o" , "modified ctx ptr R2" },
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{ "test_global_func7.o" , "foo() doesn't return scalar" },
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};
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libbpf_print_fn_t old_print_fn = NULL;
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int err, i, duration = 0;
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old_print_fn = libbpf_set_print(libbpf_debug_print);
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for (i = 0; i < ARRAY_SIZE(tests); i++) {
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const struct test_def *test = &tests[i];
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if (!test__start_subtest(test->file))
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continue;
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err_str = test->err_str;
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err = check_load(test->file);
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CHECK_FAIL(!!err ^ !!err_str);
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if (err_str)
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CHECK(found, "", "expected string '%s'", err_str);
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}
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libbpf_set_print(old_print_fn);
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}
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