tools/testing/selftests/cgroup/test_freezer.c

File Facts

System

Linux kernel

Corpus path

tools/testing/selftests/cgroup/test_freezer.c

Extension

.c

Size

29424 bytes

Lines

1513

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.

• Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• stdbool.h
• linux/limits.h
• sys/ptrace.h
• sys/types.h
• sys/mman.h
• unistd.h
• stdio.h
• errno.h
• stdlib.h
• string.h
• sys/wait.h
• kselftest.h
• cgroup_util.h

Detected Declarations

• struct cgfreezer_test
• function cg_check_frozen
• function cg_freeze_nowait
• function events
• function cg_freeze_wait
• function child_fn
• function test_cgfreezer_simple
• function test_cgfreezer_tree
• function forkbomb_fn
• function test_cgfreezer_forkbomb
• function test_cgfreezer_mkdir
• function test_cgfreezer_rmdir
• function test_cgfreezer_migrate
• function test_cgfreezer_ptrace
• function proc_check_stopped
• function test_cgfreezer_stopped
• function test_cgfreezer_ptraced
• function vfork_fn
• function vfork
• function cg_check_freezetime
• function test_cgfreezer_time_empty
• function test_cgfreezer_time_simple
• function test_cgfreezer_time_populate
• function test_cgfreezer_time_migrate
• function test_cgfreezer_time_parent
• function test_cgfreezer_time_child
• function test_cgfreezer_time_nested
• function main

Annotated Snippet

struct cgfreezer_test {
	int (*fn)(const char *root);
	const char *name;
} tests[] = {
	T(test_cgfreezer_simple),
	T(test_cgfreezer_tree),
	T(test_cgfreezer_forkbomb),
	T(test_cgfreezer_mkdir),
	T(test_cgfreezer_rmdir),
	T(test_cgfreezer_migrate),
	T(test_cgfreezer_ptrace),
	T(test_cgfreezer_stopped),
	T(test_cgfreezer_ptraced),
	T(test_cgfreezer_vfork),
	T(test_cgfreezer_time_empty),
	T(test_cgfreezer_time_simple),
	T(test_cgfreezer_time_populate),
	T(test_cgfreezer_time_migrate),
	T(test_cgfreezer_time_parent),
	T(test_cgfreezer_time_child),
	T(test_cgfreezer_time_nested),
};
#undef T

int main(int argc, char *argv[])
{
	char root[PATH_MAX];
	int i;

	ksft_print_header();
	ksft_set_plan(ARRAY_SIZE(tests));
	if (cg_find_unified_root(root, sizeof(root), NULL))
		ksft_exit_skip("cgroup v2 isn't mounted\n");
	for (i = 0; i < ARRAY_SIZE(tests); i++) {
		switch (tests[i].fn(root)) {
		case KSFT_PASS:
			ksft_test_result_pass("%s\n", tests[i].name);
			break;
		case KSFT_SKIP:
			ksft_test_result_skip("%s\n", tests[i].name);
			break;
		default:
			ksft_test_result_fail("%s\n", tests[i].name);
			break;
		}
	}

	ksft_finished();
}

Annotation

• Immediate include surface: `stdbool.h`, `linux/limits.h`, `sys/ptrace.h`, `sys/types.h`, `sys/mman.h`, `unistd.h`, `stdio.h`, `errno.h`.
• Detected declarations: `struct cgfreezer_test`, `function cg_check_frozen`, `function cg_freeze_nowait`, `function events`, `function cg_freeze_wait`, `function child_fn`, `function test_cgfreezer_simple`, `function test_cgfreezer_tree`, `function forkbomb_fn`, `function test_cgfreezer_forkbomb`.
• Atlas domain: Support Tooling And Documentation / tools.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.