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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 | #include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <linux/err.h>
#include <btf.h>
#define CHECK(condition, format...) ({ \
int __ret = !!(condition); \
if (__ret) { \
fprintf(stderr, "%s:%d:FAIL ", __func__, __LINE__); \
fprintf(stderr, format); \
} \
__ret; \
})
void btf_dump_printf(void *ctx, const char *fmt, va_list args)
{
vfprintf(ctx, fmt, args);
}
struct btf_dump_test_case {
const char *name;
struct btf_dump_opts opts;
} btf_dump_test_cases[] = {
{.name = "btf_dump_test_case_syntax", .opts = {}},
{.name = "btf_dump_test_case_ordering", .opts = {}},
{.name = "btf_dump_test_case_padding", .opts = {}},
{.name = "btf_dump_test_case_packing", .opts = {}},
{.name = "btf_dump_test_case_bitfields", .opts = {}},
{.name = "btf_dump_test_case_multidim", .opts = {}},
{.name = "btf_dump_test_case_namespacing", .opts = {}},
};
static int btf_dump_all_types(const struct btf *btf,
const struct btf_dump_opts *opts)
{
size_t type_cnt = btf__get_nr_types(btf);
struct btf_dump *d;
int err = 0, id;
d = btf_dump__new(btf, NULL, opts, btf_dump_printf);
if (IS_ERR(d))
return PTR_ERR(d);
for (id = 1; id <= type_cnt; id++) {
err = btf_dump__dump_type(d, id);
if (err)
goto done;
}
done:
btf_dump__free(d);
return err;
}
int test_btf_dump_case(int n, struct btf_dump_test_case *test_case)
{
char test_file[256], out_file[256], diff_cmd[1024];
struct btf *btf = NULL;
int err = 0, fd = -1;
FILE *f = NULL;
fprintf(stderr, "Test case #%d (%s): ", n, test_case->name);
snprintf(test_file, sizeof(test_file), "%s.o", test_case->name);
btf = btf__parse_elf(test_file, NULL);
if (CHECK(IS_ERR(btf),
"failed to load test BTF: %ld\n", PTR_ERR(btf))) {
err = -PTR_ERR(btf);
btf = NULL;
goto done;
}
snprintf(out_file, sizeof(out_file),
"/tmp/%s.output.XXXXXX", test_case->name);
fd = mkstemp(out_file);
if (CHECK(fd < 0, "failed to create temp output file: %d\n", fd)) {
err = fd;
goto done;
}
f = fdopen(fd, "w");
if (CHECK(f == NULL, "failed to open temp output file: %s(%d)\n",
strerror(errno), errno)) {
close(fd);
goto done;
}
test_case->opts.ctx = f;
err = btf_dump_all_types(btf, &test_case->opts);
fclose(f);
close(fd);
if (CHECK(err, "failure during C dumping: %d\n", err)) {
goto done;
}
snprintf(test_file, sizeof(test_file), "progs/%s.c", test_case->name);
if (access(test_file, R_OK) == -1)
/*
* When the test is run with O=, kselftest copies TEST_FILES
* without preserving the directory structure.
*/
snprintf(test_file, sizeof(test_file), "%s.c",
test_case->name);
/*
* Diff test output and expected test output, contained between
* START-EXPECTED-OUTPUT and END-EXPECTED-OUTPUT lines in test case.
* For expected output lines, everything before '*' is stripped out.
* Also lines containing comment start and comment end markers are
* ignored.
*/
snprintf(diff_cmd, sizeof(diff_cmd),
"awk '/START-EXPECTED-OUTPUT/{out=1;next} "
"/END-EXPECTED-OUTPUT/{out=0} "
"/\\/\\*|\\*\\//{next} " /* ignore comment start/end lines */
"out {sub(/^[ \\t]*\\*/, \"\"); print}' '%s' | diff -u - '%s'",
test_file, out_file);
err = system(diff_cmd);
if (CHECK(err,
"differing test output, output=%s, err=%d, diff cmd:\n%s\n",
out_file, err, diff_cmd))
goto done;
remove(out_file);
fprintf(stderr, "OK\n");
done:
btf__free(btf);
return err;
}
int main() {
int test_case_cnt, i, err, failed = 0;
test_case_cnt = sizeof(btf_dump_test_cases) /
sizeof(btf_dump_test_cases[0]);
for (i = 0; i < test_case_cnt; i++) {
err = test_btf_dump_case(i, &btf_dump_test_cases[i]);
if (err)
failed++;
}
fprintf(stderr, "%d tests succeeded, %d tests failed.\n",
test_case_cnt - failed, failed);
return failed;
}
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