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7170b7ed6a
KUnit has several macros and functions intended for use from non-test
code. These hooks, currently the kunit_get_current_test() and
kunit_fail_current_test() macros, didn't work when CONFIG_KUNIT=m.
In order to support this case, the required functions and static data
need to be available unconditionally, even when KUnit itself is not
built-in. The new 'hooks.c' file is therefore always included, and has
both the static key required for kunit_get_current_test(), and a table
of function pointers in struct kunit_hooks_table. This is filled in with
the real implementations by kunit_install_hooks(), which is kept in
hooks-impl.h and called when the kunit module is loaded.
This can be extended for future features which require similar
"hook" behaviour, such as static stubs, by simply adding new entries to
the struct, and the appropriate code to set them.
Fixed white-space errors during commit:
Shuah Khan <skhan@linuxfoundation.org>
Resolved merge conflicts with:
db105c37a4 ("kunit: Export kunit_running()")
This patch supersedes the above.
Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: David Gow <davidgow@google.com>
Reviewed-by: Rae Moar <rmoar@google.com>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* KUnit API providing hooks for non-test code to interact with tests.
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*
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* Copyright (C) 2020, Google LLC.
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* Author: Uriel Guajardo <urielguajardo@google.com>
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*/
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#ifndef _KUNIT_TEST_BUG_H
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#define _KUNIT_TEST_BUG_H
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#if IS_ENABLED(CONFIG_KUNIT)
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#include <linux/jump_label.h> /* For static branch */
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#include <linux/sched.h>
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/* Static key if KUnit is running any tests. */
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DECLARE_STATIC_KEY_FALSE(kunit_running);
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/* Hooks table: a table of function pointers filled in when kunit loads */
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extern struct kunit_hooks_table {
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__printf(3, 4) void (*fail_current_test)(const char*, int, const char*, ...);
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} kunit_hooks;
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/**
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* kunit_get_current_test() - Return a pointer to the currently running
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* KUnit test.
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*
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* If a KUnit test is running in the current task, returns a pointer to its
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* associated struct kunit. This pointer can then be passed to any KUnit
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* function or assertion. If no test is running (or a test is running in a
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* different task), returns NULL.
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*
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* This function is safe to call even when KUnit is disabled. If CONFIG_KUNIT
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* is not enabled, it will compile down to nothing and will return quickly no
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* test is running.
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*/
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static inline struct kunit *kunit_get_current_test(void)
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{
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if (!static_branch_unlikely(&kunit_running))
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return NULL;
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return current->kunit_test;
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}
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/**
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* kunit_fail_current_test() - If a KUnit test is running, fail it.
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*
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* If a KUnit test is running in the current task, mark that test as failed.
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*/
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#define kunit_fail_current_test(fmt, ...) do { \
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if (static_branch_unlikely(&kunit_running)) { \
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/* Guaranteed to be non-NULL when kunit_running true*/ \
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kunit_hooks.fail_current_test(__FILE__, __LINE__, \
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fmt, ##__VA_ARGS__); \
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} \
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} while (0)
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#else
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static inline struct kunit *kunit_get_current_test(void) { return NULL; }
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#define kunit_fail_current_test(fmt, ...) do {} while (0)
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#endif
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#endif /* _KUNIT_TEST_BUG_H */
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