tools/testing/selftests/bpf/progs/arena_strsearch.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/progs/arena_strsearch.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/progs/arena_strsearch.c
Extension
.c
Size
3750 bytes
Lines
147
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

struct glob_test {
	char const __arena *pat, *str;
	bool expected;
};

static bool test(char const __arena *pat, char const __arena *str, bool expected)
{
	bool match = glob_match(pat, str);
	bool success = match == expected;

	/* bpf_printk("glob_match %s %s res %d ok %d", pat, str, match, success); */
	return success;
}

/*
 * The tests are all jammed together in one array to make it simpler
 * to place that array in the .init.rodata section.  The obvious
 * "array of structures containing char *" has no way to force the
 * pointed-to strings to be in a particular section.
 *
 * Anyway, a test consists of:
 * 1. Expected glob_match result: '1' or '0'.
 * 2. Pattern to match: null-terminated string
 * 3. String to match against: null-terminated string
 *
 * The list of tests is terminated with a final '\0' instead of
 * a glob_match result character.
 */
static const char __arena glob_tests[] =
	/* Some basic tests */
	"1" "a\0" "a\0"
	"0" "a\0" "b\0"
	"0" "a\0" "aa\0"
	"0" "a\0" "\0"
	"1" "\0" "\0"
	"0" "\0" "a\0"
	/* Simple character class tests */
	"1" "[a]\0" "a\0"
	"0" "[a]\0" "b\0"
	"0" "[!a]\0" "a\0"
	"1" "[!a]\0" "b\0"
	"1" "[ab]\0" "a\0"
	"1" "[ab]\0" "b\0"
	"0" "[ab]\0" "c\0"
	"1" "[!ab]\0" "c\0"
	"1" "[a-c]\0" "b\0"
	"0" "[a-c]\0" "d\0"
	/* Corner cases in character class parsing */
	"1" "[a-c-e-g]\0" "-\0"
	"0" "[a-c-e-g]\0" "d\0"
	"1" "[a-c-e-g]\0" "f\0"
	"1" "[]a-ceg-ik[]\0" "a\0"
	"1" "[]a-ceg-ik[]\0" "]\0"
	"1" "[]a-ceg-ik[]\0" "[\0"
	"1" "[]a-ceg-ik[]\0" "h\0"
	"0" "[]a-ceg-ik[]\0" "f\0"
	"0" "[!]a-ceg-ik[]\0" "h\0"
	"0" "[!]a-ceg-ik[]\0" "]\0"
	"1" "[!]a-ceg-ik[]\0" "f\0"
	/* Simple wild cards */
	"1" "?\0" "a\0"
	"0" "?\0" "aa\0"
	"0" "??\0" "a\0"
	"1" "?x?\0" "axb\0"
	"0" "?x?\0" "abx\0"
	"0" "?x?\0" "xab\0"
	/* Asterisk wild cards (backtracking) */
	"0" "*??\0" "a\0"
	"1" "*??\0" "ab\0"
	"1" "*??\0" "abc\0"
	"1" "*??\0" "abcd\0"
	"0" "??*\0" "a\0"
	"1" "??*\0" "ab\0"
	"1" "??*\0" "abc\0"
	"1" "??*\0" "abcd\0"
	"0" "?*?\0" "a\0"
	"1" "?*?\0" "ab\0"
	"1" "?*?\0" "abc\0"
	"1" "?*?\0" "abcd\0"
	"1" "*b\0" "b\0"
	"1" "*b\0" "ab\0"
	"0" "*b\0" "ba\0"
	"1" "*b\0" "bb\0"
	"1" "*b\0" "abb\0"
	"1" "*b\0" "bab\0"
	"1" "*bc\0" "abbc\0"
	"1" "*bc\0" "bc\0"
	"1" "*bc\0" "bbc\0"
	"1" "*bc\0" "bcbc\0"
	/* Multiple asterisks (complex backtracking) */

Annotation

Implementation Notes